WITTER DEAN NATURAL RESOURCE DEVELOPMENT SECURITIES INC
485BPOS, 1997-04-24
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<PAGE>
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 24, 1997
    
 
   
                                                     REGISTRATION NOS.:  2-70421
                                                                        811-3129
    
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       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. 19                       /X/
    
                                     AND/OR
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                 ACT OF 1940                                 /X/
   
                               AMENDMENT NO. 20                              /X/
    
                              -------------------
 
                    DEAN WITTER NATURAL RESOURCE DEVELOPMENT
                                SECURITIES INC.
               (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)
   
        _____ IMMEDIATELY UPON FILING PURSUANT TO PARAGRAPH (B)
    
   
        ___ ON APRIL 29, 1997 PURSUANT TO PARAGRAPH (B)
    
        ___ 60 DAYS AFTER FILING PURSUANT TO PARAGRAPH (A)
        ___ ON (DATE) PURSUANT TO PARAGRAPH (A) OF RULE 485.
 
   
    THE  REGISTRANT HAS REGISTERED AN INDEFINITE  NUMBER OF ITS SHARES UNDER THE
SECURITIES ACT OF  1933 PURSUANT  TO SECTION  (A) (1)  OF RULE  24F-2 UNDER  THE
INVESTMENT  COMPANY ACT OF 1940. THE REGISTRANT HAS FILED THE RULE 24F-2 NOTICE,
FOR ITS FISCAL YEAR  ENDED FEBRUARY 28, 1997,  WITH THE SECURITIES AND  EXCHANGE
COMMISSION ON APRIL 3, 1997.
    
 
           AMENDING THE PROSPECTUS AND UPDATING FINANCIAL STATEMENTS
 
            -------------------------------------------------------
            -------------------------------------------------------
<PAGE>
            DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
 
                             CROSS-REFERENCE SHEET
 
                                   FORM N-1A
 
<TABLE>
<S>                                             <C>
ITEM                                                                           CAPTION
- ----------------------------------------------  ---------------------------------------------------------------------
PART A                                                                       PROSPECTUS
 1.  .........................................  Cover Page
 2.  .........................................  Prospectus Summary; Summary of Fund Expenses
 3.  .........................................  Financial Highlights; Performance Information
 4.  .........................................  Investment Objective and Policies; The Fund and its Management; Cover
                                                 Page; Investment Restrictions; Prospectus Summary
 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; Redemptions and
                                                 Repurchases
 8.  .........................................  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; Directors and Officers
15.  .........................................  Directors and Officers
16.  .........................................  The Fund and Its Management; Custodian and Transfer Agent;
                                                 Independent Accountants
17.  .........................................  Portfolio Transactions and Brokerage
18.  .........................................  Shares of the Fund
19.  .........................................  Redemptions and Repurchases; Financial Statements; Determination of
                                                 Net Asset Value; Shareholder Services
20.  .........................................  Dividends, Distributions and Taxes
21.  .........................................  The Distributor
22.  .........................................  Performance Information
23.  .........................................  Experts
</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>
 
   
<TABLE>
<S>                                                        <C>
              PROSPECTUS                                   TABLE OF CONTENTS
              APRIL 29, 1997                               Prospectus Summary/2
              Dean Witter Natural Resource Development     Summary of Fund Expenses/3
Securities Inc. (the "Fund") is an open-end, diversified   Financial Highlights/4
management investment company whose investment objective   The Fund and its Management/4
is capital growth. The Fund invests primarily in common    Investment Objective and Policies/5
stock of companies in the natural resources and related    Risk Considerations and Investment Practices/6
areas, including companies engaged in the exploration for  Investment Restrictions/10
and development, production and distribution of natural    Purchase of Fund Shares/10
resources or in the development of energy-efficient        Shareholder Services/13
technologies or other natural resource related supplies    Redemptions and Repurchases/16
or products. (See "Investment Objective and Policies.")    Dividends, Distributions and Taxes/18
               Shares of the Fund are continuously         Performance Information/19
offered at net asset value. However, redemptions and/or    Additional Information/19
repurchases are subject in most circumstances to a         SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
contingent deferred sales charge, scaled down from 5% to   GUARANTEED OR ENDORSED BY, ANY BANK, AND THE SHARES ARE
1% of the amount redeemed, if made within six years of     NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT INSURANCE
purchase, which charge will be paid to the Fund's          CORPORATION, THE FEDERAL RESERVE BOARD, OR ANY OTHER
Distributor, Dean Witter Distributors Inc. (See            AGENCY.
"Redemptions and Repurchases--Contingent Deferred Sales    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY
Charge.") In addition, the Fund pays the Distributor a     THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE
distribution fee pursuant to a Plan of Distribution at     SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE
the annual rate of 1% of the lesser of the (i) average     COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON
daily aggregate net sales since inception of the Plan of   THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
Distribution or (ii) average daily net assets of the Fund  REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
attributable to shares issued since the inception of the   Dean Witter
Plan of Distribution. (See "Purchase of Fund Shares--Plan  Natural Resource Development
of Distribution.")                                         Securities Inc.
               This Prospectus sets forth concisely the    Two World Trade Center
information you should know before investing in the Fund.  New York, New York 10048
It should be read and retained for future reference.       (212) 392-2550 or
Additional information about the Fund is contained in the  (800) 869-NEWS (toll-free)
Statement of Additional Information, dated April 29,
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>
    
<PAGE>
 
   
<TABLE>
<S>                  <C>
PROSPECTUS SUMMARY
The                  The Fund, a Maryland corporation, is an open-end, diversified management
Fund                 investment company investing primarily in common stock of companies in the
                     natural resources and related areas.
Shares Offered       Common Stock with $0.01 par value (see page 19).
Offering             At net asset value. (see page 11). Shares redeemed within six years of purchase
Price                are subject to a contingent deferred sales charge under most circumstances (see
                     page 16).
Minimum Purchase     Minimum initial investment $1,000; ($100 if the account is opened through
                     EasyInvest -SM-); minimum subsequent investment $100 (see page 11).
Investment           The investment objective of the Fund is capital growth.
Objective
Investment           Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the
Manager              Fund, and its wholly-owned 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 of
                     approximately $91.4 billion at March 31, 1997 (see page 4).
Management           The Investment Manager receives a monthly fee at an annual rate of 0.625 of 1%
Fee                  of daily net assets up to $250 million and 0.50 of 1% of daily net assets over
                     $250 million.
Dividends and        Dividends  from net investment income dividends paid annually; capital gains, if
Capital Gains        any, distributed annually or  retained for reinvestment  by the Fund.  Dividends
Distributions        and capital gains distributions automatically reinvested in additional shares at
                     net asset value unless the shareholder elects to receive cash (see page 18).
Distributor          Dean Witter Distributors Inc. (the "Distributor"). The Distributor receives from
                     the Fund a distribution fee accrued daily and payable monthly at the rate of
                     1.0% per annum of the lesser of (a) the Fund's average daily aggregate net sales
                     or (b) the Fund's average daily net assets. This fee compensates the Distributor
                     for the services provided in distributing shares of the Fund and for its sales
                     related expenses (see page 11). The Distributor also receives the proceeds of
                     any contingent deferred sales charges.
Redemption --        Shares are redeemable by the shareholder at net asset value. An account may be
Contingent Deferred  involuntarily redeemed if the total value of the account is less than $100, or,
Sales Charge         if the account was opened through EasyInvest -SM-, if after twelve months the
                     shareholder has invested less than $1,000 in the account. Although no commission
                     or sales charge is imposed upon the purchase of shares, a contingent deferred
                     sales charge (scaled down from 5% to 1%) is imposed on any redemption of shares
                     which causes the aggregate current value of an account with the Fund to fall
                     below the aggregate amount of the investor's purchase payments made during the
                     preceding six years. There is no charge imposed on redemption of shares
                     purchased through reinvestment of dividends or distributions (see page 16).
Retirement           You can take advantage of tax benefits for personal retirement accounts by
Plans                investing in the Fund through an IRA (Individual Retirement Account) or
                     Custodial Account under Section 403(b)(7) of the Internal Revenue Code (see page
                     13).
Risks                The net asset value of the Fund's shares will fluctuate with changes in market
                     value of portfolio securities. Emphasis on natural resources may result in
                     exposure of some companies to foreign political and currency risks and
                     substantial price fluctuations (see page 6). Investors should review the
                     investment objective and policies of the Fund carefully and consider their
                     ability to assume the risks involved in purchasing shares of the Fund (see pages
                     5 through 9). The Fund may also invest in futures and options which may be
                     considered speculative in nature and may involve greater risks than those
                     customarily assumed by other investment companies which do not invest in such
                     instruments (see page 6). In addition, the investor is directed to the
                     discussions of foreign securities on page 6.
       THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING ELSEWHERE
                  IN THE PROSPECTUS AND IN THE STATEMENT OF ADDITIONAL INFORMATION.
</TABLE>
    
 
                                       2
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
   
    The  following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The  expenses and fees set forth  in the table are for  the
fiscal year ended February 28, 1997.
    
 
<TABLE>
<CAPTION>
SHAREHOLDER TRANSACTION EXPENSES
<S>                                   <C>                                   <C>                <C>
Maximum Sales Charge Imposed on Purchases....................................................       None
Maximum Sales Charge Imposed on Reinvested Dividends.........................................       None
Deferred Sales Charge
 (as a percentage of the lesser of original purchase price or redemption proceeds)...........       5.0%
 A contingent deferred sales charge is imposed at the following declining rates:
</TABLE>
 
<TABLE>
<CAPTION>
YEAR SINCE PURCHASE                                                                 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>
 
<TABLE>
<S>                                  <C>                                  <C>                <C>
Redemption Fees............................................................................       None
Exchange Fees..............................................................................       None
</TABLE>
 
   
<TABLE>
<CAPTION>
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
<S>                                                                                        <C>
Management Fees..........................................................................       0.62%
12b-1 Fees*..............................................................................       0.98%
Other Expenses...........................................................................       0.24%
Total Fund Operating Expenses............................................................       1.84%
<FN>
- ---------------
*     A  portion of  the 12b-1  fee, which  may not  exceed 0.25%  of the Fund's
      average daily net  assets, is characterized  as a service  fee within  the
      meaning  of  National  Association of  Securities  Dealers,  Inc. ("NASD")
      guidelines (see "Purchase of Fund Shares").
</TABLE>
    
 
   
<TABLE>
<CAPTION>
EXAMPLE                                                                 1 YEAR   3 YEARS  5 YEARS  10 YEARS
- ----------------------------------------------------------------------  -------  -------  -------  --------
<S>                                                                     <C>      <C>      <C>      <C>
You would pay the following expenses on a $1,000 investment, assuming
 (1) 5% annual return and (2) redemption at the end of each time
 period...............................................................    $ 69     $ 88     $119     $215
You would pay the following expenses on the same investment, assuming
 no redemption........................................................    $ 19     $ 58     $ 99     $215
</TABLE>
    
 
    THE ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST  OR
FUTURE  EXPENSES OR PERFORMANCE. ACTUAL  EXPENSES OF THE FUND  MAY BE GREATER OR
LESS THAN THOSE SHOWN.
 
    The purpose of  this table is  to assist the  investor in understanding  the
various  costs and expenses that  an investor in the  Fund will bear directly or
indirectly. For a more complete description  of these costs and expenses, see  "
The  Fund  and  its Management,"  "Plan  of Distribution"  and  "Redemptions and
Repurchases."
 
    Long-term shareholders  of  the Fund  may  pay  more in  sales  charges  and
distribution  fees than the  economic equivalent of  the maximum front-end sales
charges permitted by the NASD.
 
                                       3
<PAGE>
FINANCIAL HIGHLIGHTS
 
- --------------------------------------------------------------------------------
 
   
    The following  ratios  and per  share  data for  a  share of  capital  stock
outstanding  throughout each period  have been audited  by Price Waterhouse LLP,
independent accountants. The financial highlights should be read in  conjunction
with  the financial  statements, notes  thereto, and  the unqualified  report of
independent accountants  which  are contained  in  the Statement  of  Additional
Information.  Further information about the performance of the Fund is contained
in the  Fund's Annual  Report to  Shareholders, which  may be  obtained  without
charge upon request to the Fund.
    
 
   
<TABLE>
<CAPTION>
                                               FOR THE YEAR ENDED FEBRUARY 28
                  ----------------------------------------------------------------------------------------
                   1997     1996*    1995     1994     1993     1992*    1991     1990     1989     1988*
- ----------------------------------------------------------------------------------------------------------
<S>               <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value,
 beginning of
 period.......... $ 12.70  $ 10.77  $ 11.82  $ 11.36  $ 10.20  $ 11.03  $ 11.33  $  9.93  $  9.46  $  9.10
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
Net investment
 income..........   --        0.06     0.09     0.09     0.16     0.20     0.25     0.30     0.23     0.20
Net realized and
 unrealized gain
 (loss)..........    2.66     2.53    (0.24)    1.25     1.18    (0.44)    0.02     1.80     0.72     0.44
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
Total from
 investment
 operations......    2.66     2.59    (0.15)    1.34     1.34    (0.24)    0.27     2.10     0.95     0.64
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
Less dividends
 and
 distributions
 from:
  Net investment
   income........   (0.02)   (0.04)   (0.12)   (0.09)   (0.18)   (0.20)   (0.28)   (0.32)   (0.21)   (0.28)
  Net realized
   gain..........   (2.00)   (0.62)   (0.78)   (0.79)   --       (0.39)   (0.29)   (0.38)   (0.27)   --
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
Total dividends
 and
 distributions...   (2.02)   (0.66)   (0.90)   (0.88)   (0.18)   (0.59)   (0.57)   (0.70)   (0.48)   (0.28)
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
Net asset value,
 end of period... $ 13.34  $ 12.70  $ 10.77  $ 11.82  $ 11.36  $ 10.20  $ 11.03  $ 11.33  $  9.93  $  9.46
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
TOTAL INVESTMENT
 RETURN+.........   20.88%   24.32%   (1.26)%   12.16%   13.31%   (1.91)%    2.87%   21.11%   10.29%    7.32%
RATIOS TO AVERAGE
 NET ASSETS:
Expenses.........    1.84%    1.90%    1.90%    1.91%    1.96%    1.93%    1.80%    1.81%    1.92%    1.81%
Net investment
 income..........    0.05%    0.52%    0.77%    0.73%    1.46%    1.67%    2.28%    2.57%    2.09%    2.14%
SUPPLEMENTAL DATA:
Net assets, end
 of period, in
 thousands....... $247,989 $152,661 $132,812 $139,459 $118,496 $113,145 $150,636 $154,741 $136,911 $171,725
Portfolio
 turnover rate...     156%      49%      59%      69%      52%      31%      29%      22%       7%      26%
Average
 commission rate
 paid............ $0.0534    --       --       --       --       --       --       --       --       --
</TABLE>
    
 
   
<TABLE>
<C>  <S>
<FN>
 
- ---------------------
 * Year ended February 29.
 +  Does not reflect the deduction of  sales charge. Calculated based on the net
asset value as of the last business day of the period.
</TABLE>
    
 
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
   
    Dean Witter Natural Resource Development Securities Inc. (the "Fund") is  an
open-end,  diversified management investment company incorporated in Maryland on
December 22, 1980.
    
 
    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
 
                                       4
<PAGE>
wholly-owned subsidiary  of Dean  Witter, Discover  & Co.  ("DWDC"), a  balanced
financial  services organization providing a  broad range of nationally marketed
credit and investment products.
 
   
    InterCapital and its wholly-owned  subsidiary, Dean Witter Services  Company
Inc.,   serve  in  various  investment   management,  advisory,  management  and
administrative capacities  to  102 investment  companies,  thirty of  which  are
listed   on  the  New  York  Stock  Exchange,  with  combined  total  assets  of
approximately $88.3 billion as  of March 31, 1997.  The Investment Manager  also
manages  and  advises  portfolios  of  pension  plans,  other  institutions  and
individuals which aggregated approximately $3.1 billion at such date.
    
 
   
    On February 5, 1997, DWDC and Morgan Stanley Group Inc. announced that  they
had  entered into an Agreement and Plan  of Merger, with the combined company to
be named Morgan  Stanley, Dean  Witter, Discover &  Co. The  business of  Morgan
Stanley  Group Inc. and  its affiliated companies  is providing a  wide range of
financial services  for sovereign  governments, corporations,  institutions  and
individuals  throughout the world. DWDC is the direct parent of InterCapital and
Dean  Witter  Distributors  Inc.,  the  Fund's  distributor.  It  is   currently
anticipated   that  the   transaction  will   close  in   mid-1997.  Thereafter,
InterCapital and Dean Witter  Distributors Inc. will  be direct subsidiaries  of
Morgan Stanley, Dean Witter, Discover & Co.
    
 
    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 to the Fund.
 
    The  Fund's Board of Directors reviews  the various services provided by the
Investment Manager to  ensure that  the Fund's general  investment policies  and
programs  are being  properly carried out  and that  administrative services are
being provided to the Fund in a satisfactory manner.
 
   
    As full compensation for the services  and facilities furnished to the  Fund
and  for expenses of the  Fund assumed by the  Investment Manager, the Fund pays
the Investment Manager  monthly compensation  calculated daily  by applying  the
following  annual rates to the net assets of the Fund determined as of the close
of each  business  day: 0.625%  of  the portion  of  the daily  net  assets  not
exceeding  $250  million  and 0.50%  of  the  portion of  the  daily  net assets
exceeding $250 million. For  the fiscal year ended  February 28, 1997, the  Fund
accrued  total compensation to the Investment  Manager amounting to 0.62% of the
Fund's average daily net assets and the Fund's total expenses amounted to  1.84%
of the Fund's average daily net assets.
    
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The  investment  objective  of  the  Fund is  capital  growth.  There  is no
assurance that the objective will be achieved. This objective is fundamental and
may not be changed  without the approval  of the stockholders  of the Fund.  The
Fund will invest primarily in common stock of companies in the natural resources
and  related areas, and will invest at least 65% of its net assets at all times,
except for  temporary and  defensive purposes,  in the  securities of  companies
engaged  in these areas. A portfolio company is considered to be so engaged when
at least 50% of its assets and/or revenues are currently the result of ownership
or development of assets in such areas. Such companies include those engaged  in
the  exploration  for and  development, production  and distribution  of natural
resources, in  the  development of  energy-efficient  technologies or  in  other
natural resource related supplies or services.
 
    The  Fund will  seek capital  growth by  investing in  securities of issuers
believed to be responsive to domestic and world demand for natural resources. As
a result of the challenges presented by natural
 
                                       5
<PAGE>
resource needs, the Fund believes that opportunities for growth can be found  in
securities  of  issuers which:  (1) own  or process  natural resources,  such as
precious metals, other minerals, water, timberland and forest products; (2)  own
or  produce  sources  of  energy  such  as  oil,  natural  gas,  coal,  uranium,
geothermal, oil shale and  biomass; (3) participate in  the exploration for  and
development of natural resources supplies from new and conventional sources; (4)
own  or  control  oil, gas,  or  other  mineral leases  (which  may  not produce
recoverable energy  or  resources), rights  or  royalty interests;  (5)  provide
natural  resources transportation, distribution or  processing services, such as
refining and pipeline services; (6)  provide related services or supplies,  such
as  drilling, well servicing, chemicals, parts and equipment; and (7) contribute
energy-efficient  technologies,   such  as   systems  for   energy   conversion,
conservation  and pollution control. Emphasis on natural resources may result in
exposure of some portfolio companies to foreign political and currency risks and
substantial price fluctuations.
 
    The Fund may purchase securities on a when issued or delayed delivery basis,
may purchase or sell securities on  a forward commitment basis and may  purchase
securities  on  a "when,  as and  if  issued" basis,  may enter  into repurchase
agreements and may invest in options  and futures transactions all as  described
below.
 
RISK CONSIDERATIONS AND INVESTMENT PRACTICES
 
    FOREIGN  SECURITIES.   Foreign  securities  investments may  be  affected by
changes  in  currency  rates  or   exchange  control  regulations,  changes   in
governmental administration or economic or monetary policy (in the United States
and  abroad) or changed circumstances  in dealings between nations. Fluctuations
in the relative rates  of exchange between the  currencies of different  nations
will affect the value of the Fund's investments denominated in foreign currency.
Changes  in foreign  currency exchange  rates relative  to the  U.S. dollar will
affect the U.S. dollar value of  the Fund's assets denominated in that  currency
and thereby impact upon the Fund's total return on such assets.
 
    Foreign  currency  exchange rates  are determined  by  forces of  supply and
demand on the foreign exchange markets. These forces are themselves affected  by
the   international  balance  of  payments  and  other  economic  and  financial
conditions, government intervention,  speculation and  other factors.  Moreover,
foreign currency exchange rates may be affected by the regulatory control of the
exchanges on which the currencies trade.
 
    Investments  in  foreign securities  will  also occasion  risks  relating to
political  and  economic  developments  abroad,  including  the  possibility  of
expropriations  or confiscatory taxation, limitations on  the use or transfer of
Fund  assets  and  any  effects   of  foreign  social,  economic  or   political
instability. Foreign companies are not subject to the regulatory requirements of
U.S.  companies and, as  such, there may be  less publicly available information
about such companies.  Moreover, foreign  companies are not  subject to  uniform
accounting,   auditing  and  financial   reporting  standards  and  requirements
comparable to those applicable to U.S. companies.
 
    Securities of foreign issuers may be less liquid than comparable  securities
of  U.S.  issuers  and, as  such,  their  price changes  may  be  more volatile.
Furthermore, foreign exchanges and broker-dealers are generally subject to  less
government   and   exchange  scrutiny   and   regulation  than   their  American
counterparts. Brokerage commissions,  dealer concessions  and other  transaction
costs may be higher on foreign markets than in the U.S. In addition, differences
in clearance and settlement procedures on foreign markets may occasion delays in
settlements  of  the  Fund's  trades  effected in  such  markets.  As  such, the
inability to  dispose of  portfolio securities  due to  settlement delays  could
result  in  losses to  the  Fund due  to subsequent  declines  in value  of such
securities and the inability of the Fund to make intended security purchases due
to settlement problems could result in a failure of the Fund to make potentially
advantageous  investments.  To   the  extent  the   Fund  purchases   Eurodollar
certifi-
 
                                       6
<PAGE>
cates  of deposit  issued by foreign  branches of domestic  Unites States banks,
consideration will be given to  their domestic marketability, the lower  reserve
requirements  normally mandated  for overseas  banking operations,  the possible
impact of interruptions in the  flow of international currency transactions  and
future  international political and economic  developments which might adversely
affect the payment of principal or interest.
 
    PRIVATE PLACEMENTS.  The  Fund may invest  up to 5% of  its total assets  in
securities  which are  subject to restrictions  on resale because  they have not
been registered under the  Securities Act of 1933,  as amended (the  "Securities
Act"),  or which are otherwise not  readily marketable. (Securities eligible for
resale pursuant to  Rule 144A  under the Securities  Act, and  determined to  be
liquid  pursuant to the procedures discussed 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  Directors of  the  Fund, will  make  a
determination  as to the liquidity of  each restricted security purchased by the
Fund. If a restricted security is determined to be "liquid," such security  will
not  be included within the category  "illiquid securities," which under current
policy may not exceed 15% of the Fund's 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.
    
 
   
    REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements, which
may  be viewed  as a type  of secured lending  by the Fund,  and which typically
involve the acquisition by the Fund of debt securities from a selling  financial
institution  such as a bank, savings  and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a fixed time in the  future, usually not more than  seven days from the date  of
purchase.  While repurchase agreements involve certain risks not associated with
direct investments  in  debt  securities,  including the  risks  of  default  or
bankruptcy  of the  selling financial  institution, the  Fund follows procedures
designed to minimize those risks. These procedures include effecting  repurchase
transactions  only with  large, well-capitalized and  well established financial
institutions and maintaining  adequate collateralization. See  the Statement  of
Additional Information for a further discussion of such investments.
    
 
    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
 
                                       7
<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.
 
OPTIONS AND FUTURES TRANSACTIONS
 
    The Fund may  purchase and sell  (write) call  and put options  on debt  and
equity  securities which  are listed  on Exchanges  or are  written in over-the-
counter transactions ("OTC Options"). Listed options, which are currently listed
on several different Exchanges, 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  will  engage  in  OTC  option  transactions  only  with  primary U.S.
Government securities  dealers recognized  by the  Federal Reserve  Bank of  New
York.  The Fund will not write covered options on portfolio securities exceeding
in the aggregate 25% of the value of its total assets.
 
    The Fund may invest up to 10% of its total assets in the purchase of put and
call options on securities and stock indexes, with a maximum of 5% of the Fund's
total assets invested in stock index options. The Fund may purchase put  options
on securities which it holds (or has the right to acquire) 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 also
purchase and write options on stock  indexes. See "Risks of Options on  Indexes"
in the Statement of Additional Information.
 
    The  Fund may also purchase  and sell interest rate  and stock index futures
contracts ("futures contracts") that are  traded on U.S. commodity exchanges  on
such  underlying securities  as U.S. Treasury  bonds, notes, and  bills and GNMA
Certificates ("interest rate" futures) and such indexes as the S&P 500 Index and
the New York  Stock Exchange  Composite Index  ("stock index"  futures) and  the
Moody's  Investment-Grade Corporate Bond Index  ("bond index" futures). The Fund
will purchase or  sell interest rate  futures contracts and  bond index  futures
contracts  for the purpose of hedging its fixed-income portfolio (or anticipated
portfolio) securities against  changes in  prevailing interest  rates. The  Fund
will  purchase or sell stock index futures  contracts for the purpose of hedging
its equity portfolio  (or anticipated portfolio)  securities against changes  in
their prices.
 
    The  Fund  also may  purchase  and write  call  and put  options  on futures
contracts and enter into  closing transactions with respect  to such options  to
terminate an existing 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.  Also,
exchanges  may limit the amount by which the price of many futures contracts may
move on any day. If  the price moves equal the  daily limit on successive  days,
then  it may prove  impossible to liquidate  a futures position  until the daily
limit  moves  have  ceased.  The  extent  to  which  the  Fund  may  enter  into
transactions  involving  options and  futures contracts  may  be limited  by the
Internal Revenue Code's requirements for qualification as a regulated investment
company  and  the  Fund's  intention   to  qualify  as  such.  See   "Dividends,
Distributions and Taxes."
 
    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  is  that  the Investment  Manager  could  be  incorrect  in its
expectations as to  the direction or  extent of various  interest rate or  price
movements  or the time span within which  the movements take place. For example,
if the Fund sold futures contracts for the sale of securities in anticipation of
an increase in interest rates, and  then interest rates went down, causing  bond
prices  to rise, the Fund would incur a loss on the sale. Another risk which may
arise in employing
 
                                       8
<PAGE>
futures  contracts  to  protect  against  the  price  volatility  of   portfolio
securities  is  that the  prices of  securities and  indexes subject  to futures
contracts (and thereby the futures  contracts prices) may correlate  imperfectly
with the behavior of the cash prices of the Fund's portfolio securities. See the
Statement of Additional Information for further discussion of such risks.
 
    New  futures  contracts, options  and other  financial products  and various
combinations thereof continue to be developed.  The Fund may invest in any  such
futures,  options or products as may be developed, to the extent consistent with
its investment objective and applicable regulatory requirements.
 
SPECIFIC INVESTMENT POLICIES
 
    The  Fund  has  adopted  the  following  specific  policies  which  are  not
fundamental  investment policies and which may be changed by the Fund's Board of
Directors:
 
        (1) At least 65% of the Fund's  total assets will be invested in  common
    stock  of  domestic and  foreign companies  in  the natural  resources areas
    described above. The  Fund may  also invest in  securities convertible  into
    common  stock and  may acquire warrants  and other rights  to acquire common
    stock in connection with purchases of portfolio securities.
 
        (2) The Fund may invest in securities of foreign companies. However, the
    Fund will not invest more than 10%  of its net assets in securities of  such
    issuers   (other  than  Canadian  issuers  on  which  there  is  no  limit).
    Investments in certain Canadian  issuers may be  speculative due to  certain
    political  risks and may  be subject to  substantial price fluctuations. The
    Fund's investments in unlisted foreign securities are deemed to be  illiquid
    securities,  which under the  Fund's current investment  policies may not in
    the aggregate amount to  more than 15% of  the Fund's total assets.  Foreign
    securities  investments  may be  affected by  changes  in currency  rates or
    exchange control  regulations,  changes in  governmental  administration  or
    economic  or monetary  policy (in the  United States and  abroad) or changed
    circumstances  in  dealings  between  nations.  Costs  may  be  incurred  in
    connection with conversions between various currencies held by the Fund.
 
        (3)  Up to 35% of  the value of the Fund's  total assets may be invested
    in: (a) common stock  of companies not in  the natural resources areas;  (b)
    investment  grade  corporate debt  securities when,  in  the opinion  of the
    Investment Manager, the projected total  return on such securities is  equal
    to  or greater than the expected total  return on equity securities, or when
    such holdings might be  expected to reduce the  volatility of the  portfolio
    (for  purposes  of  this  provision,  the  term  "total  return"  means  the
    difference between the cost  of a security and  the aggregate of its  market
    value  and dividends  received); (c) U.S.  Government securities (securities
    issued or guaranteed as  to principal and interest  by the United States  or
    its  agencies and  instrumentalities); and  (d) in  money market instruments
    under any one or more of the following circumstances: (i) pending investment
    of proceeds of sale of Fund shares or of portfolio securities; (ii)  pending
    settlement  of  purchases  of  portfolio securities;  or  (iii)  to maintain
    liquidity for the purpose of meeting anticipated redemptions.
 
        (4) Notwithstanding  any  of the  foregoing  limitations, the  Fund  may
    invest  more than  35% of  its total assets  in money  market instruments to
    maintain, temporarily, a  "defensive" posture  when, in the  opinion of  the
    Investment  Manager, it is advisable to do  so because of economic or market
    conditions.
 
    The foregoing limitations will apply at the time of acquisition based on the
last determined value  of the relevant  security or other  change in the  Fund's
assets.  Any  subsequent  change  in any  applicable  percentage  resulting from
fluctuations in value  will not  require elimination  of any  security from  the
portfolio.
 
                                       9
<PAGE>
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"), a broker-dealer affiliate of the Investment Manager,  the
views  of Trustees  of the Fund  and others regarding  economic developments and
interest rate trends; and  the Investment Manager's own  analysis of factors  it
deems  relevant.  No  particular  emphasis  will  be  given  to  investments  in
securities for the purpose of earning current income. The Fund is managed within
InterCapital's Growth Group, which manages 28 equity funds and fund  portfolios,
with  approximately $11 billion in assets as of February 28, 1997. Konrad Krill,
Vice President of InterCapital and a member of the Growth Group, is the  primary
portfolio  manager of the  Fund. Mr. Krill  has been a  portfolio manager of the
Fund since May, 1994 and has been  the sole portfolio manager of the Fund  since
April,  1995.  He  has  been  a  portfolio  manager  or  investment  analyst  at
InterCapital for over five years.
    
 
    Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain  money market instruments with DWR.  In
addition,  the Fund  may incur  brokerage commissions  on transactions conducted
through DWR.
 
    Although the Fund  does not engage  in substantial short-term  trading as  a
means  of achieving its  investment objective, it  may sell portfolio securities
without regard to the length of time they have been held, in accordance with the
investment policies described earlier. The Fund will incur underwriting discount
costs (on underwritten  securities) and  brokerage costs  commensurate with  its
portfolio  turnover  rate. Short  term  gains and  losses  may result  from such
portfolio transactions.  See "Dividends,  Distributions and  Taxes" for  a  full
discussion of the tax implications of the Fund's trading policy.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The  investment restrictions listed  below are among  the restrictions which
have been adopted  by the  Fund as  fundamental policies.  Under the  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.
 
    The Fund may not:
 
        1.    Invest more  than  5% of  the  value of  its  total assets  in the
    securities of any one issuer (other than obligations issued or guaranteed by
    the United States Government, its agencies or instrumentalities).
 
        2.  Purchase more than 10%  of all outstanding voting securities or  any
    class of securities of any one issuer.
 
        3.   Invest more than 25% of the value of its total assets in securities
    of issuers in  any one  industry. This restriction  does not  apply to  bank
    obligations  or  obligations  issued  or  guaranteed  by  the  United States
    Government or its agencies or instrumentalities.
 
        4.  Invest more than 5% of  the value of its total assets in  securities
    of  issuers having a record, together  with predecessors, of less than three
    years of  continuous operation.  This  restriction shall  not apply  to  any
    obligation  issued  or  guaranteed  by  the  United  States  Government, its
    agencies or instrumentalities.
 
                                       10
<PAGE>
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    The Fund offers its  shares for sale  to the public  on a continuous  basis.
Pursuant   to  a  Distribution  Agreement  between  the  Fund  and  Dean  Witter
Distributors Inc. (the "Distributor"), an  affiliate of the Investment  Manager,
shares  of the Fund  are distributed by  the Distributor and  offered by DWR and
other brokers and dealers who have entered into agreements with the  Distributor
("Selected  Broker-Dealers"). The principal executive  office of the Distributor
is located at Two World Trade Center, New York, New York 10048.
 
    The minimum initial purchase is $1,000. Subsequent purchases of $100 or more
may be  made  by  sending a  check,  payable  to Dean  Witter  Natural  Resource
Development  Securities  Inc.,  directly  to  Dean  Witter  Trust  Company  (the
"Transfer Agent") at P.O. Box  1040, Jersey City, NJ  07303 or by contacting  an
account  executive of DWR  or other Selected  Broker-Dealer. 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 at least  $1,000
within  the  first  twelve  months.  In  the  case  of  investments  pursuant to
Systematic Payroll Deduction Plans (including Individual Retirement Plans),  the
Fund,  in its discretion,  may accept investments without  regard to any minimum
amounts which would otherwise be required if the Fund has reason to believe that
additional investments will increase the  investment in each account 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. 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.  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.
    
 
   
    The offering price  will be the  net asset value  per share next  determined
following receipt of an order (see "Determination of Net Asset Value"). While no
sales  charge is imposed at the time shares are purchased, a contingent deferred
sales charge may  be imposed  at the time  of redemption  (see "Redemptions  and
Repurchases"). Sales personnel are compensated for selling shares of the Fund at
the  time of  their sale  by the  Distributor and/or  Selected Broker-Dealer. In
addition, some  sales  personnel  of the  Selected  Broker-Dealer  will  receive
various  types of  non-cash compensation  as special  sales incentives including
trips, educational and/or business  seminars and merchandise.  The Fund and  the
Distributor reserve the right to reject any purchase orders.
    
 
PLAN OF DISTRIBUTION
 
   
    The  Fund has adopted a  Plan of Distribution, pursuant  to Rule 12b-1 under
the Act (the "Plan"), under which the Fund will pay the Distributor a fee, which
is accrued daily and payable  monthly, at an annual rate  of 1.0% of the  lesser
of:  (a) the average daily aggregate gross  sales of the Fund's shares since the
Plan's inception on July  2, 1984 (not including  reinvestments of dividends  or
capital  gains distributions), less the average  daily aggregate net asset value
of the Fund's shares redeemed since the Plan's inception upon which a contingent
deferred sales charge has been imposed or  waived, or (b) the average daily  net
assets  of  the  Fund  attributable  to shares  issued,  net  of  related shares
redeemed, since inception of  the Plan. This  fee is treated by  the Fund as  an
expense in the year it is accrued.
    
 
    Amounts paid under the Plan are paid to the Distributor to compensate it for
the services
pro-
 
                                       11
<PAGE>
vided  and the expenses borne by the  Distributor and others in the distribution
of the Fund's  shares, including  the payment of  commissions for  sales of  the
Fund's  shares  and  incentive  compensation  to  and  expenses  of  DWR account
executives and others  who engage in  or support distribution  of shares or  who
service   shareholder  accounts,  including  overhead  and  telephone  expenses;
printing and distribution of  prospectuses and reports  used in connection  with
the  offering  of the  Fund's  shares to  other  than current  shareholders; and
preparation, printing  and  distribution  of sales  literature  and  advertising
materials.  In addition, the  Distributor may utilize fees  paid pursuant to the
Plan to compensate DWR and  other Selected Broker-Dealers for their  opportunity
costs  in advancing such amounts,  which compensation would be  in the form of a
carrying charge on any unreimbursed expenses incurred.
 
   
    For the fiscal year ended February 28, 1997, the Fund accrued payments under
the Plan amounting to $1,910,070, which amount  is equal to 0.98% of the  Fund's
average  daily net assets  for the fiscal  year. The payments  accrued under the
Plan were calculated pursuant  to clause (a) of  the compensation formula  under
the  Plan. A  portion of  the fee payable  pursuant to  the Plan,  which may not
exceed 0.25%  of the  Fund's average  daily net  assets, is  characterized as  a
service  fee within the meaning of NASD guidelines. The service fee is a payment
made for personal service and/or maintenance of shareholder accounts.
    
 
   
    At any given time, the Distributor may incur expenses in distributing shares
of the Fund may be in excess of the  total of (i) the payments made by the  Fund
pursuant  to the Plan and (ii) the proceeds of contingent deferred sales charges
paid  by  investors  upon  the   redemption  of  shares  (see  "Redemption   and
Repurchases--Contingent  Deferred Sales Charge"). For  example, if $1 million in
expenses in distributing shares of the  Fund had been incurred and $750,000  had
been  received as  described in  (i) and  (ii) above,  the excess  expense would
amount to  $250,000.  The Distributor  has  advised  the Fund  that  the  excess
distribution  expenses, including the carrying  charge described above, totalled
$6,803,658 at February  28, 1997, which  was equal  to 2.74% of  the Fund's  net
assets on such date.
    
 
    Because  there  is no  requirement under  the Plan  that the  Distributor be
reimbursed for all expenses or any  requirement that the Plan be continued  from
year  to year, this excess  amount does not constitute  a liability of the Fund.
Although there is no legal obligation for  the Fund to pay expenses incurred  in
excess  of payments made to  the Distributor under the  Plan and the proceeds of
contingent deferred sales charges paid  by investors upon redemption of  shares,
if  for any reason  the Plan is  terminated the Directors  will consider at that
time the  manner  in which  to  treat  such expenses.  Any  cumulative  expenses
incurred, but not yet recovered through distribution fees or contingent deferred
sales  charges, may or may not be  recovered through future distribution fees or
contingent deferred sales charges.
 
DETERMINATION OF NET ASSET VALUE
 
    The net asset value per share of the Fund is determined by taking the  value
of  all assets  of the  Fund, subtracting all  its liabilities,  dividing by the
number of shares outstanding  and adjusting to the  nearest cent. The net  asset
value per share of the Fund is determined once daily at 4:00 p.m., New York time
(or, on days when the New York Stock Exchange closes prior to 4:00 p.m., at such
earlier  time), on each  day that the New  York Stock Exchange  is open. The net
asset value per share will  not be determined on Good  Friday and on such  other
federal and non-federal holidays as are observed by the New York Stock Exchange.
 
   
    In  the calculation of the  Fund's net asset value:  (1) an equity portfolio
security listed or traded on  the New York or  American Stock Exchange or  other
stock  exchange is valued  at its latest  sale price on  that exchange; 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 Directors), and (2) all other
    
 
                                       12
<PAGE>
portfolio securities for  which over-the-counter market  quotations are  readily
available  are valued at  the latest bid  price. When market  quotations are not
readily available, including circumstances under  which it is determined by  the
Investment  Manager that sale and bid prices  are not reflective of a security's
market value, portfolio securities are valued at their fair value as  determined
in  good faith under procedures established by and under the general supervision
of the Fund's Directors.
 
    Short-term debt securities with remaining  maturities of sixty days or  less
are  valued  at amortized  cost  unless the  Directors  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 Directors.
 
    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.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
   
    AUTOMATIC  INVESTMENT OF DIVIDENDS AND  DISTRIBUTIONS.  All income dividends
and capital gains distributions  are automatically paid  in full and  fractional
shares  of the  Fund (or,  if specified by  the shareholder,  any other open-end
investment  company  for  which   InterCapital  serves  as  Investment   Manager
(collectively,  with the Fund, the "Dean Witter Funds")), unless the shareholder
requests that they be paid  in cash. Shares so acquired  are not subject to  the
imposition  of a  contingent deferred  sales charge  upon their  redemption (see
"Redemptions and Repurchases").
    
 
    INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who  receives  a  cash  payment   representing  a  dividend  or  capital   gains
distribution may invest such dividend or distribution at the net asset value per
share next determined after receipt by the Transfer Agent by returning the check
or the proceeds to the Transfer Agent within thirty days after the payment date.
Shares  so acquired are not  subject to the imposition  of a contingent deferred
sales charge upon their redemption (see "Redemptions and Repurchases").
 
    EASYINVEST -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, 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
contingent deferred sales charge  will be imposed on  shares redeemed under  the
Withdrawal  Plan  (see "Redemptions  and Repurchases--Contingent  Deferred Sales
Charge"). Therefore, any shareholder participating  in the Withdrawal Plan  will
have  sufficient shares redeemed  from his or  her account so  that the proceeds
(net of any applicable contingent deferred sales charge) to the shareholder will
be the designated monthly or quarterly amount.
    
 
    Shareholders should  contact  their  DWR  or  other  Selected  Broker-Dealer
account executive or the Transfer Agent for further information about any of the
above services.
 
                                       13
<PAGE>
    TAX-SHELTERED  RETIREMENT PLANS.  Retirement plans  are available for use by
corporations, the  self-employed, eligible  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
 
    The Fund  makes  available  to  its  shareholders  an  "Exchange  Privilege"
allowing  the exchange  of shares of  the Fund  for shares of  other Dean Witter
Funds sold  with a  contingent deferred  sales charge  ("CDSC funds"),  and  for
shares  of Dean Witter Short-Term U.S.  Treasury Trust, Dean Witter Limited Term
Municipal Trust, Dean Witter Intermediate Term U.S. Treasury Trust, Dean  Witter
Short-Term  Bond Fund,  Dean Witter Balanced  Income Fund,  Dean Witter Balanced
Growth Fund  and  five Dean  Witter  Funds which  are  money market  funds  (the
foregoing eleven non-CDSC funds are hereinafter collectively referred to in this
section  as the "Exchange Funds"). Exchanges may be made after the shares of the
Fund acquired by purchase (not by  exchange or dividend reinvestment) have  been
held  for  thirty days.  There  is no  waiting  period for  exchanges  of shares
acquired by exchange or dividend reinvestment.
 
    An exchange to another CDSC  fund or any Exchange Fund  that is not a  money
market  fund is on the basis of the next calculated net asset value per share of
each fund after  the exchange order  is received. When  exchanging into a  money
market  fund from the Fund, shares  of the Fund are redeemed  out of the Fund at
their next calculated  net asset value  and the proceeds  of the redemption  are
used  to  purchase shares  of the  money market  fund at  their net  asset value
determined the following business day.  Subsequent exchanges between any of  the
money  market funds and any of the CDSC funds can be effected on the same basis.
No contingent  deferred sales  charge ("CDSC")  is imposed  at the  time of  any
exchange, although any applicable CDSC will be imposed upon ultimate redemption.
Shares of the Fund acquired in exchange for shares of another CDSC fund having a
different  CDSC schedule  than that  of this  Fund will  be subject  to the CDSC
schedule of this  Fund, even if  such shares are  subsequently re-exchanged  for
shares  of the  CDSC fund  originally purchased. During  the period  of time the
shareholder remains in the  Exchange Fund (calculated from  the last day of  the
month in which the shares were acquired), the holding period (for the purpose of
determining  the rate of the  CDSC) is frozen. If  those shares are subsequently
reexchanged for shares of a CDSC fund, the holding period previously frozen when
the first exchange was made resumes on the last day of the month in which shares
of a CDSC fund are reacquired. Thus, the CDSC is based upon the time (calculated
as described above) the shareholder was invested  in shares of a CDSC fund  (see
"Redemptions  and Repurchases--Contingent  Deferred Sales  Charge"). However, in
the case of shares exchanged for shares  of 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
prospectus for those funds.)
 
    In addition, shares of the  Fund may be acquired  in exchange for shares  of
Dean  Witter Funds sold  with a front-end sales  charge ("front-end sales charge
funds"), but shares  of the  Fund, however acquired,  may not  be exchanged  for
shares  of  front-end sales  charge funds.  Shares  of a  CDSC fund  acquired in
exchange for shares of a front-end sales charge fund (or in exchange for  shares
of  other Dean Witter  Funds for which  shares of a  front-end sales charge fund
have been exchanged) are not subject to any CDSC upon their redemption.
 
    Purchases and  exchanges should  be  made for  investment purposes  only.  A
pattern  of frequent  exchanges may  be deemed by  the Investment  Manager to be
abusive and contrary to the best interests of the Fund's other shareholders and,
at the
Invest-
 
                                       14
<PAGE>
ment 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 may be
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 one and examine it carefully before
investing. Exchanges are subject to  the minimum investment requirement and  any
other  conditions imposed by each fund. In the case of any shareholder holding a
share certificate or  certificates, no  exchanges may  be made  until the  share
certificate(s)  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.
 
   
    If DWR or  another 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 or  other  Selected Broker-Dealer
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 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
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 will 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.
 
                                       15
<PAGE>
    Shareholders  should  contact  their  DWR  or  other  Selected Broker-Dealer
account executive  or  the Transfer  Agent  for further  information  about  the
Exchange Privilege.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.   Shares of the Fund can be redeemed for cash at any time at net
asset value per share next determined; however, such redemption proceeds will be
reduced by the amount of any  applicable contingent deferred sales charges  (see
below).  If  shares  are  held  in  a  shareholder's  account  without  a  stock
certificate, a written request for redemption to the Fund's Transfer Agent at P.
O. Box 983, Jersey City, New Jersey 07303 is required. If certificates are  held
by  the shareholder, the shares may be redeemed by surrendering the certificates
with a  written request  for redemption  along with  any additional  information
required by the Transfer Agent.
 
    CONTINGENT DEFERRED SALES CHARGE.  Shares of the Fund which are held for six
years or more after purchase (calculated from the last day of the month in which
the  shares were purchased) will  not be subject to  any charge upon redemption.
Shares redeemed sooner than six years after purchase may, however, be subject to
a charge upon  redemption. This charge  is called a  "contingent deferred  sales
charge"  ("CDSC"), which  will be  a percentage of  the dollar  amount of shares
redeemed and will be assessed  on an amount equal to  the lesser of the  current
market  value  or  the cost  of  the shares  being  redeemed. The  size  of this
percentage will depend upon how long the shares have been held, as set forth  in
the table below:
 
<TABLE>
<CAPTION>
                                     CONTINGENT DEFERRED
            YEAR SINCE                  SALES CHARGE
             PURCHASE                AS A PERCENTAGE OF
           PAYMENT MADE                AMOUNT REDEEMED
- -----------------------------------  -------------------
<S>                                  <C>
First..............................         5.0%
Second.............................         4.0%
Third..............................         3.0%
Fourth.............................         2.0%
Fifth..............................         2.0%
Sixth..............................         1.0%
Seventh and thereafter.............         None
</TABLE>
 
    A  CDSC will not be imposed on:  (i) any amount which represents an increase
in value of shares purchased within the six years preceding the redemption; (ii)
the current net asset value of shares purchased more than six years prior to the
redemption; and (iii) the  current net asset value  of shares purchased  through
reinvestment  of dividends or  distributions and/or shares  acquired in exchange
for shares of Dean Witter Funds sold  with a front-end sales charge or of  other
Dean Witter Funds acquired in exchange for such shares. Morevoer, in determining
whether  a CDSC is applicable it will  be assumed that amounts described in (i),
(ii) and (iii) above (in  that order) are redeemed  first. In addition, no  CDSC
will  be imposed on redemptions  of shares which were  purchased by certain Unit
Investment Trusts  (on  which  a  sales  charge has  been  paid)  or  which  are
attributable to reinvestment of dividends or distributions from, or the proceeds
of, such Unit Investment Trusts.
 
    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,
 
                                       16
<PAGE>
in  the case of a "key employee" of  a "top heavy" plan, following attainment of
age 59 1/2);   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
corporate or self-employed retirement plan qualified under Section 401(k) of the
Internal   Revenue  Code  which  offers  investment  companies  managed  by  the
Investment Manager  or its  subsidiary, Dean  Witter Services  Company Inc.,  as
self-directed investment alternatives and for which Dean Witter Trust Company or
Dean  Witter Trust FSB, each of which is an affiliate of the Investment Manager,
serves as  Trustee  or  the 401(k)  Support  Services  Group of  DWR  serves  as
recordkeeper  ("Eligible  401(k) Plan"),  provided that  either:   (a)  the plan
continues to be  an Eligible  401(k) 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.
 
    REPURCHASE.    DWR  and  other  Selected  Broker-Dealers  are  authorized to
repurchase shares represented by a stock  certificate which is delivered to  any
of  their  offices.  Shares held  in  a  shareholder's account  without  a stock
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 per  share, next determined  (see "Purchase of  Fund Shares")  after
such  repurchase  order  is received  by  DWR or  other  Selected Broker-Dealer,
reduced by any applicable CDSC.
 
    The CDSC, if any, will be the only fee imposed upon repurchase by the  Fund,
the  Distributor, DWR  or other Selected  Broker-Dealers. 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 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  thirty  days  after  the  date  of  the  redemption  or
repurchase,  reinstate any portion or all of  the proceeds of such redemption or
repurchase in shares of the Fund at the net asset value next determined after  a
reinstatement request, together with 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
 
                                       17
<PAGE>
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 Board of Directors or, in the  case
of  an account opened through EasyInvest, if after twelve months the shareholder
has invested less than $1,000 in  the account. However, before the Fund  redeems
such  shares  and sends  the proceeds  to  the shareholder,  it will  notify the
shareholder that the value of the shares is less than the applicable amount  and
allow  the shareholder to make an additional  investment in an amount which will
increase the value of the account to  at least the applicable amount before  the
redemption is processed. No CDSC will be imposed on any involuntary redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS  AND  DISTRIBUTIONS.   The Fund  intends to  pay dividends  and to
distribute substantially  all  of  the  Fund's net  investment  income  and  net
short-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
Fund  shares (without  sales charge) and  will be automatically  credited to the
shareholder's account  without  issuance  of  a  stock  certificate  unless  the
shareholder  requests  in  writing that  all  dividends  be paid  in  cash. (See
"Shareholder Services--Automatic Investment of Dividends and Distributions.")
    
 
    TAXES.  Because  the Fund intends  to distribute all  of its net  investment
income  and net  short-term capital gains  to shareholders  and otherwise remain
qualified as a regulated investment company  under Subchapter M of the  Internal
Revenue  Code of 1986, 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 have to pay Federal income
taxes, and any state  income taxes 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 or net short-term
capital gains,  are  taxable to  the  shareholder as  ordinary  dividend  income
regardless  of whether the shareholder receives such distributions in additional
shares or in cash.
 
    As a regulated investment company, the  Fund is subject to the  requirements
that  less than 30%  of the Fund's gross  income be derived  from gains from the
sale or other disposition  of securities held for  less than three months.  This
requirement  may  limit the  Fund's  ability to  engage  in options  and futures
transactions.
 
   
    The Fund may at times  make payments from sources  other than income or  net
capital gains. Payments from such sources will, in effect, represent a return of
a  portion of each shareholder's investment. All, or a portion, of such payments
will not be taxable to shareholders.
    
 
   
    After  the  end  of  the  calendar  year,  shareholders  will  receive  full
information on their dividends and capital gains distributions for tax purposes.
To  avoid  being subject  to a  31%  Federal backup  withholding tax  on taxable
dividends, capital  gains  distributions and  the  proceeds of  redemptions  and
repurchases, shareholders' taxpayer identification numbers must be furnished and
certified as to their accuracy.
    
 
    Distributions  of  net  long-term  capital gains,  if  any,  are  taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. Capital  gains distributions are not eligible  for
the dividends received deduction.
 
    Shareholders  should consult their  tax advisers as  to the applicability of
the foregoing to their current situation.
 
                                       18
<PAGE>
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From time to time  the Fund may quote  its "total return" in  advertisements
and  sales  literature. The  total return  of  the Fund  is based  on historical
earnings and is not intended to indicate future performance. The "average annual
total return" of the Fund refers  to a figure reflecting the average  annualized
percentage  increase (or decrease) in the value  of an initial investment in the
Fund of $1,000 over  periods of one,  five and ten  years. Average annual  total
return  reflects all income earned by the Fund, any appreciation or depreciation
of the Fund's assets, all  expenses incurred by the  Fund and all sales  charges
which  would be incurred  by redeeming shareholders, for  the stated periods. It
also assumes reinvestment of all dividends and distributions paid by the Fund.
 
    In addition to the foregoing, the  Fund may advertise its total return  over
different  periods of time by means of aggregate, average, year-by-year or other
types of total  return figures.  Such calculations may  or may  not reflect  the
deduction  of the  contingent deferred sales  charge which,  if reflected, would
reduce the  performance  quoted. The  Fund  may  also advertise  the  growth  of
hypothetical investments of $10,000, $50,000 and $100,000 in shares of the Fund.
The  Fund  from time  to time  may  also advertise  its performance  relative to
certain performance rankings and  indexes compiled by independent  organizations
(such as mutual fund performance rankings of Lipper Analytical Services, Inc.).
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING  RIGHTS.   All shares of  common stock of  the Fund are  of $0.01 par
value and are equal as to earnings,  assets and voting privileges. There are  no
conversion,   pre-emptive  or  other  subscription   rights.  In  the  event  of
liquidation, each share of common stock of  the Fund is entitled to its  portion
of  all of the  Fund's assets after all  debts and expenses  have been paid. The
shares do not have cumulative voting rights.
 
    Under ordinary circumstances, the Fund is not required, nor does it  intend,
to hold Annual Meetings of Stockholders. The Directors may call Special Meetings
of  Stockholders for action by stockholder vote as may be required by the Act or
the Fund's By-Laws.
 
    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  60 days of a
sale or  a sale  within 60  days  of a  purchase) of  a security.  In  addition,
investment  personnel may  not purchase  or sell  a security  for their personal
account within 30 days before or after  any transaction in any Dean Witter  Fund
managed  by them. Any violations of the Code of Ethics are subject to sanctions,
including reprimand, demotion  or suspension or  termination of employment.  The
Code  of Ethics comports with regulatory requirements and the recommendations in
the 1994 report by the Investment  Company Institute Advisory Group on  Personal
Investing.
 
    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.
 
                                       19
<PAGE>
 
   
Dean Witter
Natural Resource Development
Securities Inc.
                                    DEAN WITTER
Two World Trade Center
New York, New York 10048
BOARD OF DIRECTORS                  NATURAL RESOURCE
Michael Bozic                       DEVELOPMENT
Charles A. Fiumefreddo              SECURITIES
Edwin J. Garn
John R. Haire
Dr. Manuel H. Johnson
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
OFFICERS
Charles A. Fiumefreddo
Chairman and Chief Executive
Officer
Barry Fink
Vice President, Secretary and
General Counsel
Konrad Krill
Vice President
Thomas F. Caloia
Treasurer
CUSTODIAN
The Bank of New York
90 Washington Street
New York, New York 10286
TRANSFER AGENT AND DIVIDEND
DISBURSING AGENT
Dean Witter Trust Company
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311
INDEPENDENT ACCOUNTANTS
Price Waterhouse LLP
1177 Avenue of the Americas
New York, New York 10036
INVESTMENT MANAGER
Dean Witter InterCapital Inc.
 
                                           PROSPECTUS -- APRIL 29, 1997
 
    
<PAGE>
 
   
STATEMENT OF ADDITIONAL INFORMATION       Dean Witter
APRIL 29, 1997                            Natural Resource
                                          Development
                                          Securities
 
- --------------------------------------------------------------------------------
    
 
   
    Dean  Witter Natural Resource Development Securities Inc. (the "Fund") is an
open-end, diversified management investment  company whose investment  objective
is  capital growth. The Fund  invests primarily in common  stock of companies in
the natural  resources and  related areas,  including companies  engaged in  the
exploration   for  and  development,  production  and  distribution  of  natural
resources or  in  the  development of  energy-efficient  technologies  or  other
natural  resource related supplies  or products. (See  "Investment Practices and
Policies.")
    
 
   
    A Prospectus for  the Fund dated  April 29, 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 Natural Resource Development Securities Inc.
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
Directors and Officers......................................................................          6
Investment Practices and Policies...........................................................         11
Investment Restrictions.....................................................................         22
Portfolio Transactions and Brokerage........................................................         24
The Distributor.............................................................................         25
Shareholder Services........................................................................         29
Redemptions and Repurchases.................................................................         33
Dividends, Distributions and Taxes..........................................................         35
Performance Information.....................................................................         36
Shares of the Fund..........................................................................         37
Custodian and Transfer Agent................................................................         37
Independent Accountants.....................................................................         38
Reports to Shareholders.....................................................................         38
Legal Counsel...............................................................................         38
Experts.....................................................................................         38
Registration Statement......................................................................         38
Report of Independent Accountants...........................................................         39
Financial Statements--February 28, 1997.....................................................         40
</TABLE>
    
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
    The  Fund was  incorporated in  the State of  Maryland on  December 22, 1980
under the  name InterCapital  Natural Resource  Development Securities  Inc.  On
March  16, 1983 the  Fund's shareholders approved  a change in  the Fund's name,
effective March 21, 1983, to Dean Witter Natural Resource Development Securities
Inc.
 
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 Dean Witter, Discover &  Co. ("DWDC"), a Delaware corporation. In
an internal  reorganization  which took  place  in January,  1993,  InterCapital
assumed  the  investment  advisory,  administrative  and  management  activities
previously performed by the InterCapital  Division of Dean Witter Reynolds  Inc.
("DWR"), a broker-dealer affiliate of InterCapital. (As hereinafter used in this
Statement  of Additional  Information, the terms  "InterCapital" and "Investment
Manager"  refer  to   DWR's  InterCapital   Division  prior   to  the   internal
reorganization  and  to Dean  Witter  InterCapital Inc.  thereafter.)  The daily
management of  the  Fund  and  research relating  to  the  Fund's  portfolio  is
conducted  by  or  under  the direction  of  officers  of the  Fund  and  of the
Investment Manager,  subject  to  review  by  the  Fund's  Board  of  Directors.
Information  as to these  Directors and Officers is  contained under the caption
"Directors and Officers."
    
 
   
    InterCapital is also  the investment  manager or investment  adviser of  the
following investment companies: Dean Witter Liquid Asset Fund Inc., InterCapital
Income  Securities Inc., InterCapital Insured Municipal Bond Trust, InterCapital
Insured Municipal Trust,  Dean Witter  High Yield Securities  Inc., Dean  Witter
Tax-Free  Daily Income  Trust, Dean  Witter Developing  Growth Securities Trust,
Dean Witter Tax-Exempt Securities Trust, Dean Witter Dividend Growth  Securities
Inc.,  Dean Witter American Value Fund, 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 New  York Municipal  Money  Market Trust,  Dean Witter
Capital Growth Securities, Dean  Witter European Growth  Fund Inc., Dean  Witter
Precious  Metals and Minerals  Trust, Dean Witter  Global Short-Term Income Fund
Inc., Dean Witter Pacific  Growth Fund Inc.,  Dean Witter Multi-State  Municipal
Series   Trust,  Dean  Witter  Short-Term   U.S.  Treasury  Trust,  Dean  Witter
Diversified Income Trust, Dean Witter Premier Income Trust, InterCapital Quality
Municipal Investment Trust,  InterCapital Quality Municipal  Income Trust,  Dean
Witter  Retirement  Series,  Dean  Witter  Health  Sciences  Trust, InterCapital
Insured Municipal Income Trust, InterCapital California Insured Municipal Income
Trust, 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 National Municipal Trust, Dean  Witter
High  Income Securities,  Dean Witter  International SmallCap  Fund, Dean Witter
Mid-Cap Growth Fund, Dean  Witter Select Dimensions  Series, Dean Witter  Global
Asset  Allocation Fund, Dean  Witter Balanced Income  Fund, Dean Witter Balanced
Growth  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 Financial  Services Trust,  Dean Witter  Market Leader  Trust, Dean
Witter Special Value  Fund, Active  Assets Money Trust,  Active Assets  Tax-Free
Trust,  Active  Assets  California  Tax-Free  Trust,  Active  Assets  Government
Securities Trust, 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, Prime  Income
Trust  and Municipal Premium  Income Trust. The  foregoing investment companies,
together with the Fund, are collectively  referred to as the Dean Witter  Funds.
In
    
 
                                       3
<PAGE>
   
addition,  Dean Witter Services Company Inc. ("DWSC"), a wholly-owned subsidiary
of InterCapital, serves as manager  for the following investment companies,  for
which  TCW Funds Management  Inc. is the investment  adviser: 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  Term Trust  2000,
TCW/DW  Term  Trust 2002,  TCW/DW Term  Trust 2003  and TCW/DW  Emerging Markets
Opportunities Trust  (the  "TCW/DW  Funds"). InterCapital  also  serves  as  (i)
sub-advisor  to  Templeton Global  Opportunities  Trust, an  open-end investment
company; (ii)  administrator of  The Black  Rock Strategic  Term Trust  Inc.,  a
closed-end  investment  company;  and  (iii)  sub-administrator  of  Mass Mutual
Participation  Investors  and   Templeton  Global   Governments  Income   Trust,
closed-end investment companies.
    
 
    Pursuant  to an Investment  Management Agreement (the  "Agreement") with the
Investment Manager, the Fund has retained  the Investment Manager to manage  the
investment  of  the  Fund's assets,  including  the  placing of  orders  for the
purchase and sale of  portfolio securities. The  Investment Manager obtains  and
evaluates  such  information  and  advice relating  to  the  economy, securities
markets, and  specific  securities  as  it  considers  necessary  or  useful  to
continuously  manage the  assets of  the Fund  in a  manner consistent  with its
investment objective and policies.
 
    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, 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  between 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 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  borne by  the Fund  include, but  are not  limited  to:
expenses  of  the  Plan  of  Distribution  pursuant  to  Rule  12b-1  (see  "The
Distributor"); charges and expenses of any registrar, custodian, stock  transfer
and  dividend  disbursing  agent; brokerage  commissions;  taxes;  engraving and
printing stock 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 Directors' meetings and of preparing, printing and
mailing  of  proxy  statements  and reports  to  shareholders;  fees  and travel
expenses of Directors or members of any advisory board or committee who are  not
employees of the Investment Manager or any corporate affiliate of the Investment
Manager;  all  expenses  incident  to  any  dividend,  withdrawal  or redemption
options; charges and  expenses of any  outside service used  for pricing of  the
Fund's  shares; fees  and expenses  of legal  counsel, including  counsel to the
Directors 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
 
                                       4
<PAGE>
property or personnel (including officers and Directors) 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.
 
   
    As full compensation for the services  and facilities furnished to the  Fund
and  expenses of the Fund  assumed by the Investment  Manager, the Fund pays the
Investment  Manager  monthly  compensation  calculated  daily  by  applying  the
following  annual rates to the net assets of the Fund determined as of the close
of each  business  day: 0.625%  of  the portion  of  the daily  net  assets  not
exceeding  $250  million  and 0.50%  of  the  portion of  the  daily  net assets
exceeding $250 million. For the fiscal  years ended February 28, 1995,  February
29, 1996 and February 28, 1997, the Fund accrued to the Investment Manager total
compensation  under  the  Agreement in  the  amounts of  $886,340,  $883,804 and
$1,221,826, 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 Agreement was initially  approved by the Directors  on October 30,  1992
and  by the Shareholders at  a Meeting of Shareholders  on January 12, 1993. The
Agreement is substantially identical to a prior investment management  agreement
which  was initially approved by the Board  of Directors on January 18, 1983 and
by the shareholders on  March 16, 1983.  The Agreement took  effect on June  30,
1993  upon the spin-off by Sears, Roebuck & Co. of its remaining shares of DWDC.
The Agreement may be  terminated at any time,  without penalty, on thirty  days'
notice  by the Board of Directors 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, 1994 and
provides   that  it  will  continue  from  year  to  year  thereafter,  provided
continuance of the Agreement is  approved at least annually  by the vote of  the
holders  of a majority, as defined in the  Act, of the outstanding shares of the
Fund, or by the Board  of Directors of the Fund;  provided that in either  event
such continuance is approved annually by the vote of a majority of the Directors
of  the Fund who  are not parties  to the Agreement  or "interested persons" (as
defined in the Act) of any  such party, which vote must  be cast in person at  a
meeting called for the purpose of voting on such approval. At their meeting held
on  February  21,  1997,  the  Board  of  Directors  approved  a  new Investment
Management Agreement,  to take  effect upon  the proposed  merger of  DWDC  with
Morgan Stanley Group Inc. (see "The Fund and its Management" in the Prospectus),
subject to approval of the Agreement by the shareholders of the Fund, and called
a  Special Meeting  of Shareholders  to be  held on  May 21,  1997 at  which the
shareholders will vote  on approval or  disapproval of such  Agreement. The  new
Agreement  is substantially  identical to the  present Agreement  except for the
dates of effectiveness and termination. At their meeting held on April 24, 1997,
the Board of  Directors, including  all of the  Independent Directors,  approved
continuation  of the present Management Agreement until the earlier of April 30,
1998 or consummation of the proposed merger.
    
 
   
    The Fund has acknowledged that the name "Dean Witter" is a property right of
DWR. The Fund has agreed that the 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.
    
 
                                       5
<PAGE>
DIRECTORS AND OFFICERS
- --------------------------------------------------------------------------------
 
   
    The Directors 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 84 Dean Witter Funds and the 14 TCW/DW Funds are shown
below.
    
 
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND
               AND ADDRESS                                 PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -----------------------------------------  -----------------------------------------------------------------------------
 
<S>                                        <C>
Michael Bozic (56)                         Chairman and Chief Executive Officer  of Levitz Furniture Corporation  (since
Director                                   November,  1995);  Director or  Trustee of  the  Dean Witter  Funds; formerly
c/o Levitz Furniture Corporation           President and  Chief  Executive  Officer of  Hills  Department  Stores  (May,
6111 Broken Sound Parkway, N.W.            1991-July,  1995);  formerly  variously  Chairman,  Chief  Executive Officer,
Boca Raton, Florida                        President and Chief  Operating Officer (1987-1991)  of the Sears  Merchandise
                                           Group  of Sears, Roebuck  and Co.; Director  of Eaglemark Financial Services,
                                           Inc., the United Negro College Fund and Weirton Steel Corporation.
 
Charles A. Fiumefreddo* (63)               Chairman, Chief Executive Officer and Director of InterCapital,  Distributors
Chairman, Director,                        and  DWSC; Executive Vice President and Director of DWR; Chairman, Trustee or
President and Chief                        Director, President and  Chief Executive  Officer of the  Dean Witter  Funds;
Executive Officer                          Chairman,  Chief Executive Officer and Trustee  of the TCW/DW Funds; Chairman
Two World Trade Center                     and Director of Dean Witter  Trust Company ("DWTC"); formerly Executive  Vice
New York, New York                         President  and  Director  of  DWDC (until  February,  1993);  Director and/or
                                           officer of various DWDC subsidiaries.
 
Edwin J. Garn (64)                         Director or Trustee of the Dean Witter Funds; formerly United States  Senator
Director                                   (R-Utah)  (1974-1992)  and  Chairman, Senate  Banking  Committee (1980-1986);
c/o Huntsman Corporation                   formerly Mayor of Salt Lake City, Utah (1971-1974); formerly Astronaut, Space
500 Huntsman Way                           Shuttle Discovery (April  12-19, 1985); Vice  Chairman, Huntsman  Corporation
Salt Lake City, Utah                       (since  January, 1993); Director of  Franklin Quest (time management systems)
                                           and John Alden  Financial Corp. (health  insurance); member of  the board  of
                                           various civic and charitable organizations.
 
John R. Haire (72)                         Chairman  of  the  Audit  Committee  and Chairman  of  the  Committee  of the
Director                                   Independent Directors or Trustees and Director or Trustee of the Dean  Witter
Two World Trade Center                     Funds;  Chairman of the Audit Committee and  Chairman of the Committee of the
New York, New York                         Independent Trustees and Trustee  of the TCW/  DW Funds; formerly  President,
                                           Council  for Aid  to Education  (1978-1989) and  formerly Chairman  and Chief
                                           Executive Officer of Anchor  Corporation, an Investment Adviser  (1964-1978);
                                           Director of Washington National Corporation (insurance).
 
Dr. Manuel H. Johnson (48)                 Senior  Partner,  Johnson  Smick  International,  Inc.,  a  consulting  firm;
Director                                   Co-Chairman  and  a  founder  of  the  Group  of  Seven  Council  (G7C),   an
c/o Johnson Smick International, Inc.      international  economic commission;  Director or  Trustee of  the Dean Witter
1133 Connecticut Avenue, N.W.              Funds; Trustee of the  TCW/DW Funds; Director of  NASDAQ (since June,  1995);
Washington, D.C.                           Director  of Greenwich Capital Markets Inc.  (broker- dealer); Trustee of the
                                           Financial  Accounting  Foundation  (oversight  organization  for  the  FASB);
                                           formerly  Vice  Chairman of  the Board  of Governors  of the  Federal Reserve
                                           System (1986-1990) and Assistant Secretary of the U.S. Treasury (1982-1986).
</TABLE>
    
 
                                       6
<PAGE>
 
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND
               AND ADDRESS                                 PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -----------------------------------------  -----------------------------------------------------------------------------
 
<S>                                        <C>
Michael E. Nugent (60)                     General Partner,  Triumph Capital,  L.P., a  private investment  partnership;
Director                                   Director  or Trustee of the  Dean Witter Funds; Trustee  of the TCW/DW Funds;
c/o Triumph Capital, L.P.                  formerly Vice President,  Bankers Trust  Company and  BT Capital  Corporation
237 Park Avenue                            (1984-1988); director of various business organizations.
New York, New York
 
Philip J. Purcell* (53)                    Chairman  of the Board of Directors and  Chief Executive Officer of DWDC, DWR
Director                                   and  Novus  Credit  Services  Inc.;   Director  of  InterCapital,  DWSC   and
Two World Trade Center                     Distributors;  Director or Trustee of the  Dean Witter Funds; Director and/or
New York, New York                         officer of various DWDC subsidiaries.
 
John L. Schroeder (66)                     Retired; Director or Trustee of the  Dean Witter Funds; Director of  Citizens
Director                                   Utilities  Company; formerly  Executive Vice  President and  Chief Investment
c/o Gordon Altman Butowsky                 Officer of the  Home Insurance  Company (August,  1991-September, 1995);  and
Weitzen Shalov & Wein                      formerly Chairman and Chief Investment Officer of Axe-Houghton Management and
Counsel to the Independent Trustees        the Axe-Houghton Funds (1983-1991).
114 West 47th Street
New York, New York
 
Barry Fink (42)                            Senior  Vice President (since March, 1997)  and Secretary and General Counsel
Vice President, Secretary                  (since February, 1997) of InterCapital and DWSC; Senior Vice President (since
and General Counsel                        March, 1997)  and  Assistant  Secretary  and  Assistant  General  Counsel  of
Two World Trade Center                     Distributors  (since  February,  1997);  Assistant  Secretary  of  DWR (since
New York, New York                         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.
 
Konrad Krill (37)                          Vice President of InterCapital; Vice President of various Dean Witter Funds.
Vice President
Two World Trade Center
New York, New York
 
Thomas F. Caloia (51)                      First  Vice  President  and  Assistant Treasurer  of  InterCapital  and DWSC;
Treasurer                                  Treasurer of the Dean Witter Funds and the TCW/DW Funds.
Two World Trade Center
New York, New York
<FN>
- ------------------------
*Denotes Directors who are "interested persons" of the Fund, as defined in the
Act.
</TABLE>
    
 
   
    In addition, Robert  M. Scanlan,  President and Chief  Operating Officer  of
InterCapital  and DWSC,  Executive Vice President  of Distributors  and DWTC and
Director of  DWTC,  Joseph J.  McAlinden,  Executive Vice  President  and  Chief
Investment  Officer of InterCapital  and Director of  DWTC, Robert S. Giambrone,
Senior Vice President of InterCapital, DWSC, Distributors and DWTC and  Director
of  DWTC and Paul D.  Vance, Kenton J. Hinchliffe, 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 and LouAnne D. McInnis and Ruth Rossi, Vice Presidents and
Assistant General Counsels of InterCapital and DWSC, and Carsten Otto and  Frank
Bruttomesso, staff attorneys with InterCapital, are Assistant Secretaries of the
Fund.
    
 
                                       7
<PAGE>
   
THE BOARD OF DIRECTORS, THE INDEPENDENT DIRECTORS, AND THE COMMITTEES
    
 
   
    The  Board  of  Directors  consists  of  eight  (8)  directors.  These  same
individuals also  serve as  directors or  trustees for  all of  the Dean  Witter
Funds,  and are referred to in this section as Directors. As of the date of this
Statement of Additional Information, there are a total of 84 Dean Witter  Funds,
comprised  of 127 portfolios.  As of March  31, 1997, the  Dean Witter Funds had
total net  assets of  approximately  $82.9 billion  and  more than  six  million
shareholders.
    
 
   
    Six  Directors (75%  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, DWDC.  These
are the "disinterested" or "independent" Directors. The other two Directors (the
"management  Directors")  are  affiliated  with InterCapital.  Four  of  the six
independent Directors are also Independent Directors of the TCW/DW Funds.
    
 
   
    Law and regulation establish both general guidelines and specific duties for
the Independent Directors. The Dean  Witter Funds seek as Independent  Directors
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 Directors 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 Directors serve as members of the Audit Committee and
the  Committee of the Independent Directors. 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  Directors 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  Directors 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 Directors  are required  to select and  nominate individuals  to
fill  any Independent Director vacancy on the Board  of any Fund that has a Rule
12b-1 plan of distribution. Most of the Dean Witter Funds have such a plan.
    
 
   
    The Audit  Committee is  charged with  recommending to  the full  Board  the
engagement  or  discharge  of  the  Fund's  independent  accountants;  directing
investigations into matters  within the  scope of  the independent  accountants'
duties,  including the power  to retain outside  specialists; reviewing with the
independent accountants the audit plan  and results of the auditing  engagement;
approving  professional  services provided  by  the independent  accountants and
other accounting firms prior to the performance of such services; reviewing  the
independence  of the independent accountants; considering the range of audit and
non-audit fees;  reviewing  the  adequacy  of  the  Fund's  system  of  internal
controls;  and preparing  and submitting Committee  meeting minutes  to the full
Board.
    
 
   
    Finally, the  Board of  each  Fund has  formed  a Derivatives  Committee  to
establish  parameters for and oversee the activities of the Fund with respect to
derivative investments, if any, made by the Fund.
    
 
   
DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT DIRECTORS AND AUDIT COMMITTEE
    
 
   
    The Chairman of  the Committee of  the Independent Directors  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  Directors  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
    
 
                                       8
<PAGE>
   
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 Directors 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 Directors.
    
 
   
    The  Chairman of  the Committee of  the Independent Directors  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
Director of the Dean Witter Funds and as an Independent Director 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 DIRECTORS FOR ALL DEAN
WITTER FUNDS
    
 
   
    The Independent Directors and the Funds' management believe that having  the
same  Independent  Directors  for  each  of the  Dean  Witter  Funds  avoids the
duplication  of  effort  that  would  arise  from  having  different  groups  of
individuals  serving as Independent Directors  for each of the  Funds or even of
sub-groups of Funds.  They believe  that having  the same  individuals serve  as
Independent  Directors of  all the Funds  tends to increase  their knowledge and
expertise regarding matters which affect the Fund complex generally and enhances
their ability  to negotiate  on behalf  of  each Fund  with the  Fund's  service
providers. This arrangement also precludes the possibility of separate groups of
Independent Directors 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  Directors serve on all Fund  Boards
enhances  the ability of  each Fund to  obtain, at modest  cost to each separate
Fund, the services of Independent Directors, and a Chairman of their Committees,
of the caliber, experience and business  acumen of the individuals who serve  as
Independent Directors of the Dean Witter Funds.
    
 
   
COMPENSATION OF INDEPENDENT DIRECTORS
    
 
   
    The  Fund pays each Independent Director an  annual fee of $1,000 plus a per
meeting fee of $50 for meetings of  the Board of Directors or committees of  the
Board  of Directors attended by the Director  (the Fund pays the Chairman of the
Audit Committee an annual fee of $750 and pays the Chairman of the Committee  of
the  Independent Directors  an additional annual  fee of $1,200).  The Fund also
reimburses such Directors for travel  and other out-of-pocket expenses  incurred
by  them in connection  with attending such meetings.  Directors 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.
    
 
   
    The  following  table  illustrates  the  compensation  paid  to  the  Fund's
Independent Directors by the Fund for the fiscal year ended February 28, 1997.
    
 
   
                               FUND COMPENSATION
    
 
   
<TABLE>
<CAPTION>
                                                                   AGGREGATE
                                                                 COMPENSATION
NAME OF INDEPENDENT DIRECTOR                                     FROM THE FUND
- --------------------------------------------------------------  ---------------
<S>                                                             <C>
Michael Bozic.................................................      $1,750
Edwin J. Garn.................................................       1,850
John R. Haire.................................................       3,750
Dr. Manuel H. Johnson.........................................       1,800
Michael E. Nugent.............................................       1,850
John L. Schroeder.............................................       1,850
</TABLE>
    
 
                                       9
<PAGE>
   
    The  following  table  illustrates  the  compensation  paid  to  the  Fund's
Independent Directors 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.
    
 
   
              COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
    
 
   
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS    FOR SERVICE        TOTAL
                                                                    CHAIRMAN OF          AS         COMPENSATION
                                                                   COMMITTEES OF     CHAIRMAN OF        PAID
                               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 DIRECTOR              FUNDS              FUNDS             FUNDS            FUNDS           FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
Michael Bozic..............      $138,850           --                 --               --            $138,850
<S>                          <C>                <C>                <C>              <C>             <C>
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, including the Fund, have adopted a retirement program under which
an Independent Director 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 Director referred to
as an "Eligible Director") 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 Director
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  Director for service to  the
Adopting  Fund  in  the five  year  period prior  to  the date  of  the Eligible
Director'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 Directors by the Fund for the fiscal year ended February  28,
1997  and by the  57 Dean Witter Funds  (including the Fund)  for the year ended
December 31,  1996,  and  the  estimated  retirement  benefits  for  the  Fund's
Independent  Directors, to commence  upon their retirement, from  the Fund as of
February 28, 1997 and from the 57 Dean Witter Funds as of December 31, 1996.
    
- ------------------------
   
(1) An Eligible Director may elect  alternate payments of his or her  retirement
    benefits  based upon the combined life  expectancy of such Eligible Director
    and his or her  spouse on the date  of such Eligible Director's  retirement.
    The  amount estimated to be payable under this method, through the remainder
    of the later of the lives of such Eligible Director and spouse, will be  the
    actuarial  equivalent  of the  Regular  Benefit. In  addition,  the Eligible
    Director 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.
    
 
                                       10
<PAGE>
   
RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS
    
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                  RETIREMENT BENEFITS
                                                 FOR ALL ADOPTING FUNDS                                     ESTIMATED ANNUAL
                                         --------------------------------------   ACCRUED AS EXPENSES           BENEFITS
                                              ESTIMATED                                                    UPON RETIREMENT(2)
                                           CREDITED YEARS         ESTIMATED      ----------------------  ----------------------
                                            OF SERVICE AT       PERCENTAGE OF                 BY ALL       FROM      FROM ALL
                                             RETIREMENT           ELIGIBLE        BY THE     ADOPTING       THE      ADOPTING
NAME OF INDEPENDENT DIRECTOR                (MAXIMUM 10)        COMPENSATION       FUND        FUNDS       FUND        FUNDS
- ---------------------------------------  -------------------  -----------------  ---------  -----------  ---------  -----------
<S>                                      <C>                  <C>                <C>        <C>          <C>        <C>
Michael Bozic..........................              10               50.0%      $     379   $  20,147   $     925  $    51,325
Edwin J. Garn..........................              10               50.0             549      27,772         925       51,325
John R. Haire..........................              10               50.0            (385 (3)     46,952     2,246     129,550
Dr. Manuel H. Johnson..................              10               50.0             230      10,926         925       51,325
Michael E. Nugent......................              10               50.0             394      19,217         925       51,325
John L. Schroeder......................               8               41.7             732      38,700         771       42,771
</TABLE>
    
 
- ------------------------
   
(2) Based on  current levels  of compensation.  Amount of  annual benefits  also
    varies  depending  on the  Director's  elections described  in  Footnote (1)
    above.
    
 
   
(3) This number  reflects the effect  of the  extension of Mr.  Haire's term  as
    Director until June 1, 1998.
    
 
   
    As  of the date  of this Statement of  Additional Information, the aggregate
number of shares of Common  Stock of the Fund owned  by the Fund's officers  and
Directors  as a  group was less  than 1 percent  of the Fund's  shares of Common
Stock outstanding.
    
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
FOREIGN SECURITIES
 
   
    As discussed in the Prospectus, the Fund may invest in securities of foreign
companies. It  should  be  noted  that there  may  be  less  publicly  available
information  about  foreign issuers  than  about domestic  issuers,  and foreign
issuers may  not be  subject  to accounting,  auditing and  financial  reporting
standards  and requirements comparable to  those of domestic issuers. Securities
of some foreign  issuers are less  liquid and more  volatile than securities  of
comparable  domestic  issuers and  foreign  brokerage commissions  are generally
higher than in the  United States. Foreign securities  markets may also be  less
liquid,  more volatile  and less subject  to government supervision  than in the
United States.  Investments in  foreign  countries could  be affected  by  other
factors  not present in the United States, including expropriation, confiscatory
taxation and potential difficulties in enforcing contractual obligations. During
the fiscal year ended  February 28, 1997 the  Fund's purchases of securities  of
foreign issuers did not exceed 5% of the Fund's net assets.
    
 
SECURITY LOANS
 
    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 cash
equivalents, 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.
 
    A loan may be terminated by the borrower on one business day's notice, or by
the  Fund on four  business days' notice.  If the borrower  fails to deliver the
loaned securities within four days after  receipt of notice, the Fund could  use
the  collateral to replace the securities  while holding the borrower liable for
any excess  of replacement  cost  over collateral.  As  with any  extensions  of
credit,  there are risks of  delay in recovery and, in  some cases, even loss of
rights in the collateral should the borrower of the securities fail financially.
However, these loans of portfolio securities  will only be made to firms  deemed
by  the Fund's management  to be creditworthy  and when the  income which can be
earned from such 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
 
                                       11
<PAGE>
market  price of the securities during the period of the loan would inure to the
Fund. The Fund will pay  reasonable finder's, administrative and custodial  fees
in  connection with a loan  of its securities. The  creditworthiness of firms to
which the Fund lends  its portfolio securities will  be monitored on an  ongoing
basis.
 
   
    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. During its fiscal year ended February 28, 1997, the Fund
did not loan any of its portfolio securities and it has no intention of doing so
in the foreseeable future.
    
 
BORROWING OF MONEY
 
   
    The Fund,  from time  to  time, may  borrow from  a  bank for  temporary  or
emergency  purposes  in  amounts not  exceeding  5%  of its  total  assets. (See
Investment Restriction 6.)
    
 
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 stock indexes and  purchase options of the same  series
to  effect closing transactions, and may  hedge against potential changes in the
market value of investments (or  anticipated investments) by purchasing put  and
call  options on  portfolio (or eligible  portfolio) securities  and engaging in
transactions involving futures contracts and options on such contracts. Call and
put options on U.S.  Treasury notes, bonds and  bills and equity securities  are
listed  on  Exchanges and  are  written in  over-the-counter  transactions ("OTC
options"). Listed  options  are  issued  by  the  Options  Clearing  Corporation
("OCC").  Ownership of a listed call option gives the Fund the right to buy from
the OCC the  underlying security covered  by the option  at the stated  exercise
price  (the price  per unit  of the underlying  security) by  filing an exercise
notice prior to the expiration  date of the option.  The writer (seller) of  the
option would then have the obligation to sell to the OCC the underlying security
at that exercise price prior to the expiration date of the option, regardless of
its  then current market price. Ownership of  a listed put option would give the
Fund the right to sell the underlying security to the OCC at the stated exercise
price. Upon notice of exercise  of the put option, the  writer of the put  would
have  the obligation  to purchase  the underlying security  from the  OCC at the
exercise price.
 
    OPTIONS ON TREASURY BONDS  AND NOTES.  Because  trading interest in  options
written  on  Treasury bonds  and  notes tends  to  center on  the  most recently
auctioned issues, the exchanges on which such securities trade will not continue
indefinitely to  introduce  options with  new  expirations to  replace  expiring
options  on  particular  issues.  Instead,  the  expirations  introduced  at the
commencement of options  trading on a  particular issue will  be allowed to  run
their  course, with the possible addition of a limited number of new expirations
as the original ones  expire. Options trading  on each issue  of bonds or  notes
will  thus be phased  out as new options  are listed on  more recent issues, and
options representing  a  full  range  of  expirations  will  not  ordinarily  be
available for every issue on which options are traded.
 
    OPTIONS ON TREASURY BILLS.  Because a deliverable Treasury bill changes from
week to week, writers of Treasury bill calls cannot provide in advance for their
potential   exercise  settlement  obligations  by   acquiring  and  holding  the
underlying security. However,  if the  Fund holds  a long  position in  Treasury
bills with a principal amount of the securities deliverable upon exercise of the
option,  the position may be  hedged from a risk standpoint  by the writing of a
call option. For so long as the  call option is outstanding, the Fund will  hold
the Treasury bills in a segregated account with its Custodian, so that they will
be treated as being covered.
 
    OTC  OPTIONS.  Exchange-listed  options are issued by  the OCC which assures
that all transactions  in such options  are properly executed.  OTC options  are
purchased from or sold (written) to dealers or financial institutions which have
entered  into direct agreements with the  Fund. With OTC options, such variables
as expiration date, exercise price and  premium will be agreed upon between  the
Fund  and the  transacting dealer, without  the intermediation of  a third party
such as the OCC. If the transacting dealer fails to make or take delivery of the
securities underlying an option it has written, in accordance with the terms  of
that option, the
 
                                       12
<PAGE>
Fund  would lose  the premium  paid for  the option  as well  as any anticipated
benefit of the  transaction. This Fund  will engage in  OTC option  transactions
only  with primary U.S. Government securities  dealers recognized by the Federal
Reserve Bank of New York.
 
   
    COVERED CALL WRITING.  As stated in the Prospectus, the Fund is permitted to
write covered call options on portfolio securities in order to aid in  achieving
its  investment objective.  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 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  securities 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 achieve  a greater  total return  than would  be
realized  from holding  the underlying  securities 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 by the Fund at a loss.  The
premium  received will 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 less total return  from the portion of
its portfolio upon which  calls have been  written than it  would have had  such
calls not been written.
 
   
    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  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 accomplished  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. w
    
 
    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. Also, effecting a closing purchase transaction
will permit the  cash or  proceeds from the  concurrent sale  of any  securities
subject to the option to be used for other investments by the Fund. 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.
 
    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 on the option less the commission paid.
 
    Options  written by a Fund normally have expiration dates of from up to nine
months (equity securities) to eighteen months (fixed-income securities) 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.
 
                                       13
<PAGE>
   
    COVERED  PUT WRITING.  As stated in the Prospectus, 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 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 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 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).  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.
    
 
    The  Fund will write put options for two purposes: (1) to receive the income
derived from  the premiums  paid  by purchasers;  and  (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. 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 on securities and stock indexes in
amounts equalling up to  10% of its total  assets, with a maximum  of 5% of  the
Fund's  assets  invested in  stock  index options.  The  Fund may  purchase call
options only in order to  close out a covered  call position (see "Covered  Call
Writing" above). The purchase of the call option to effect a closing transaction
on  a call  written over-the-counter may  be a  listed or 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 (or has the
right to acquire) 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.
And  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.
 
                                       14
<PAGE>
   
    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, 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  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.
    
 
    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. However,  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  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 excercisable  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.
 
                                       15
<PAGE>
    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.
 
    STOCK INDEX OPTIONS.  As stated in the Prospectus, options on stock  indexes
are  similar to options on  stock except that, rather than  the right to take or
make delivery of stock at  a specified price, an option  on a stock index  gives
the  holder the right to receive, upon exercise of the option, an amount of cash
if the  closing level  of the  stock index  upon which  the option  is based  is
greater  than, in the case  of a call, or  less than, in the  case of a put, the
exercise price of the option.  This amount of cash  is equal to such  difference
between  the closing  price of the  index and  the exercise price  of the option
expressed  in  dollars  times  a  specified  multiple  (the  "multiplier").  The
multiplier  for  an index  option performs  a  function similar  to the  unit of
trading for a stock option. It determines the total dollar value per contract of
each point in the  difference between the  exercise price of  an option and  the
current  level  of  the underlying  index.  A  multiplier of  100  means  that a
one-point difference  will yield  $100. Options  on different  indexes may  have
different  multipliers. The writer of the option is obligated, in return for the
premium received, to  make delivery of  this amount. Unlike  stock options,  all
settlements  are in cash  and a gain or  loss depends on  price movements in the
stock market generally (or  in a particular segment  of the market) rather  than
the  price movements in individual stocks.  Currently, options are traded on the
S&P 100 Index and the S&P 500  Index on the Chicago Board Options Exchange,  the
Major   Market  Index  and   the  Computer  Technology   Index,  Oil  Index  and
Institutional Index on the American Stock  Exchange and the NYSE Index and  NYSE
Beta Index on the New York Stock Exchange, The Financial News Composite Index on
the  Pacific Stock Exchange and  the Value Line Index,  National O-T-C Index and
Utilities Index  on the  Philadelphia  Stock Exchange,  each  of which  and  any
similar  index on which  options are traded  in the future  which include stocks
that are not  limited to any  particular industry  or segment of  the market  is
referred  to as a "broadly based stock  market index." The Fund will invest only
in broadly based indexes. Options on broad-based stock indexes provide the  Fund
with  a  means of  protecting the  Fund against  the risk  of market  wide price
movements. If  the Investment  Manager anticipates  a market  decline, the  Fund
could  purchase  a  stock  index  put option.  If  the  expected  market decline
materialized, the resulting decrease in the value of the Fund's portfolio  would
be  offset to the extent of the increase in  the value of the put option. If the
Investment Manager anticipates  a market  rise, the  Fund may  purchase a  stock
index  call  option  to  enable  the Fund  to  participate  in  such  rise until
completion of  anticipated common  stock purchases  by the  Fund. Purchases  and
sales of stock index options also enable the Investment Manager to more speedily
achieve changes in the Fund's equity positions.
 
   
    The  Fund will write put options on stock indexes only if such positions are
covered by cash, U.S. Government securities or other liquid portfolio securities
equal to the aggregate  exercise price of the  puts, or by a  put option on  the
same  stock index with a strike price no  lower than the strike price of the put
option sold  by the  Fund, which  cover is  held for  the Fund  in a  segregated
account  maintained for it  by the Fund's  Custodian. All call  options on stock
indexes written by  the Fund will  be covered  either by a  portfolio of  stocks
substantially  replicating the movement of the  index underlying the call option
or by holding a separate call option on the same stock index with a strike price
no higher than the strike price of the call option sold by the Fund.
    
 
    RISKS OF OPTIONS ON INDEXES.   Because exercises of stock index options  are
settled  in cash, call  writers such as  the Fund cannot  provide in advance for
their potential settlement obligations by  acquiring and holding the  underlying
securities. A call writer can offset some of the risk of its writing position by
holding  a  diversified  portfolio  of  stocks similar  to  those  on  which the
underlying index  is  based. However,  most  investors cannot,  as  a  practical
matter,  acquire and hold a portfolio containing  exactly the same stocks as the
underlying index, and, as a result, bear a risk that the value of the securities
held will vary from the value of the  index. Even if an index call writer  could
assemble  a  stock  portfolio that  exactly  reproduced the  composition  of the
underlying index,  the writer  still would  not  be fully  covered from  a  risk
standpoint  because of the "timing risk" inherent in writing index options. When
an index option is exercised, the amount of cash that the holder is entitled  to
receive  is  determined by  the difference  between the  exercise price  and the
closing index level  on the date  when the  option is exercised.  As with  other
kinds  of  options,  the  writer  will  not  learn  that  it  has  been assigned
 
                                       16
<PAGE>
until the next business day, at the earliest. The time lag between exercise  and
notice  of  assignment poses  no risk  for the  writer  of a  covered call  on a
specific underlying security, such as a common stock, because there the writer's
obligation is to deliver the underlying security,  not to pay its value as of  a
fixed  time  in the  past. So  long as  the writer  already owns  the underlying
security, it can satisfy its settlement obligations by simply delivering it, and
the risk that its value  may have declined since the  exercise date is borne  by
the  exercising holder. In contrast,  even if the writer  of an index call holds
stocks that exactly match the composition  of the underlying index, it will  not
be able to satisfy its assignment obligations by delivering those stocks against
payment  of the exercise price.  Instead, it will be required  to pay cash in an
amount based on the closing index value on the exercise date; and by the time it
learns that  it  has  been  assigned,  the  index  may  have  declined,  with  a
corresponding  decrease in the value of  its stock portfolio. This "timing risk"
is an inherent limitation on  the ability of index  call writers to cover  their
risk exposure by holding stock positions.
 
    A  holder of an index option who exercises it before the closing index value
for that day is available runs the  risk that the level of the underlying  index
may  subsequently change. If such  a change causes the  exercised option to fall
out-of-the-money, the exercising holder will  be required to pay the  difference
between  the closing index value and the exercise price of the option (times the
applicable multiplier) to the assigned writer.
 
    If dissemination of the current level of an underlying index is interrupted,
or if trading is interrupted in  stocks accounting for a substantial portion  of
the  value of an index, the trading of  options on that index will ordinarily be
halted. If the trading of options on an underlying index is halted, an  exchange
may impose restrictions prohibiting the exercise of such options.
 
    FUTURES  CONTRACTS.  As stated in the  Prospectus, the Fund may purchase and
sell interest rate and stock index futures contracts ("futures contracts")  that
are  traded on  U.S. commodity exchanges  on such underlying  securities as U.S.
Treasury bonds, notes, bills and GNMA Certificates ("interest rate" futures) and
such indexes as the S&P 500  Index, the Moody's Investment-Grade Corporate  Bond
Index and the New York Stock Exchange Composite Index ("index" futures).
 
    As  a  futures contract  purchaser, the  Fund incurs  an obligation  to take
delivery of a specified  amount of the obligation  underlying the contract at  a
specified  time in the  future for a specified  price. As a  seller of a futures
contract, the Fund incurs an obligation  to deliver the specified amount of  the
underlying obligation at a specified time in return for an agreed upon price.
 
    The  Fund will  purchase or  sell interest  rate futures  contracts and bond
index futures contracts for  the purpose of  hedging its fixed-income  portfolio
(or  anticipated portfolio)  securities against  changes in  prevailing interest
rates. If the Investment Manager anticipates  that interest rates may rise  and,
concomitantly,  the price of fixed-income securities falls, the Fund may sell an
interest rate futures contract  or a bond index  futures contract. If  declining
interest  rates are anticipated, the Fund  may purchase an interest rate futures
contract to protect against a potential increase in the price of U.S. Government
securities the Fund intends to purchase. Subsequently, appropriate  fixed-income
securities may be purchased by the Fund in an orderly fashion; as securities are
purchased,  corresponding futures  positions would  be terminated  by offsetting
sales of contracts.
 
    The Fund will purchase or sell stock index futures contracts for the purpose
of hedging its  equity portfolio (or  anticipated portfolio) securities  against
changes  in their prices. If the  Investment Manager anticipates that the prices
of stock held  by the Fund  may fall, the  Fund may sell  a stock index  futures
contract.  Conversely,  if  the  Investment  Manager  wishes  to  hedge  against
anticipated price rises in those stocks which the Fund intends to purchase,  the
Fund  may purchase stock index futures contracts. In addition, interest rate and
stock index futures contracts  will be bought  or sold in order  to close out  a
short or long position in a corresponding futures contract.
 
    Although  most interest rate  futures contracts call  for actual delivery or
acceptance of  securities,  the contracts  usually  are closed  out  before  the
settlement  date without the  making or taking of  delivery. Stock index futures
contracts provide for the  delivery of an  amount of cash  equal to a  specified
dollar  amount times the difference between the stock index value at the open or
close   of    the    last   trading    day    of   the    contract    and    the
 
                                       17
<PAGE>
futures  contract price. A  futures contract sale  is closed out  by effecting a
futures contract purchase for the same aggregate amount of the specific type  of
equity  security  and the  same delivery  date.  If the  sale price  exceeds the
offsetting purchase price,  the seller would  be paid the  difference and  would
realize  a gain. If  the offsetting purchase  price exceeds the  sale price, the
seller would pay the difference and  would realize a loss. Similarly, a  futures
contract  purchase is closed  out by effecting  a futures contract  sale for the
same aggregate amount  of the specific  type of security  and the same  delivery
date.  If the  offsetting sale price  exceeds the purchase  price, the purchaser
would realize a gain, whereas if the purchase price exceeds the offsetting  sale
price,  the purchaser would realize a loss.  There is no assurance that the Fund
will be able to enter into a closing transaction.
 
   
    INTEREST RATE FUTURES CONTRACTS.  When the Fund enters into an interest rate
futures contract, it is initially required to deposit with the Fund's Custodian,
in a segregated account in the name of the broker performing the transaction, an
"initial margin" of cash or U.S. Government securities or other liquid portfolio
securities equal  to approximately  2% of  the contract  amount. Initial  margin
requirements  are established by the Exchanges  on which futures contracts trade
and may, from time  to time, change. In  addition, brokers may establish  margin
deposit requirements in excess of those required by the Exchanges.
    
 
    Initial   margin  in  futures  transactions  is  different  from  margin  in
securities transactions in that initial margin does not involve the borrowing of
funds by a brokers' client but is,  rather, a good faith deposit on the  futures
contract  which will be returned to the  Fund upon the proper termination of the
futures contract. The margin  deposits made are marked  to market daily and  the
Fund  may be  required to  make subsequent deposits  of cash  or U.S. Government
securities called "variation margin," with the Fund's futures contract  clearing
broker,  which are  reflective of  price fluctuations  in the  futures contract.
Currently, interest rate futures contracts  can be purchased on debt  securities
such  as  U.S. Treasury  Bills and  Bonds, U.S.  Treasury Notes  with Maturities
between 6 1/2 and 10 years, GNMA Certificates and Bank Certificates of Deposit.
 
    INDEX FUTURES  CONTRACTS.   As discussed  in the  Prospectus, the  Fund  may
invest  in index  futures contracts. An  index futures contract  sale creates an
obligation by the Fund, as seller, to  deliver cash at a specified future  time.
An  index futures contract purchase  would create an obligation  by the Fund, as
purchaser, to  take  delivery  of  cash at  a  specified  future  time.  Futures
contracts  on indexes  do not require  the physical delivery  of securities, but
provide for  a final  cash  settlement on  the  expiration date  which  reflects
accumulated profits and losses credited or debited to each party's account.
 
    The  Fund  is  required to  maintain  margin deposits  with  brokerage firms
through which it  effects index futures  contracts in a  manner similar to  that
described  above  for interest  rate futures  contracts. Currently,  the initial
margin requirements  range from  3% to  10%  of the  contract amount  for  index
futures.  In addition,  due to  current industry  practice, daily  variations in
gains and losses on open contracts are  required to be reflected in cash in  the
form  of variation margin payments. The Fund  may be required to make additional
margin payments during the term of the contract.
 
    At any time prior to expiration of the futures contract, the Fund may  elect
to  close the  position by  taking an  opposite position  which will  operate to
terminate the Fund's position in the futures contract. A final determination  of
variation  margin is  then made, additional  cash is  required to be  paid by or
released to the Fund and the Fund realizes a loss or a gain.
 
    Currently, index futures contracts can be purchased or sold with respect to,
among others, the Standard  & Poor's 500  Stock Price Index  and the Standard  &
Poor's  100 Stock Price Index  on the Chicago Mercantile  Exchange, the New York
Stock Exchange  Composite Index  on the  New York  Futures Exchange,  the  Major
Market  Index on the American Stock Exchange,  the Value Line Stock Index on the
Kansas City Board of Trade and the Moody's Investment-Grade Corporate Bond Index
on the Chicago Board of Trade.
 
    OPTIONS ON FUTURES CONTRACTS.  The Fund may purchase and write call and  put
options on futures contracts and enter into closing transactions with respect to
such  options to terminate an existing position. An option on a futures contract
gives the purchaser the right (in return  for the premium paid), and the  writer
the  obligation, to assume a position in  a futures contract (a long position if
the option is a call and a short position if the option is a put) at a specified
exercise price at  any time  during the  term of  the option.  Upon exercise  of
 
                                       18
<PAGE>
the  option, the delivery of the futures position by the writer of the option to
the holder of the option is  accompanied by delivery of the accumulated  balance
in the writer's futures margin account, which represents the amount by which the
market  price of the  futures contract at  the time of  exercise exceeds, in the
case of a call, or is less than, in the case of a put, the exercise price of the
option on the futures contract.
 
    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
(purchase of a call option or  sale of a put option)  and the sale of a  futures
contract  (purchase of a put option or sale of a call option), or to close out a
long or short  position in futures  contracts. If, for  example, the  Investment
Manager  wished  to  protect  against  an increase  in  interest  rates  and the
resulting negative  impact  on  the  value of  a  portion  of  its  fixed-income
portfolio,  it might write a  call option on an  interest rate futures contract,
the underlying security of  which correlates with the  portion of the  portfolio
the  Investment Manager seeks to hedge. Any  premiums received in the writing of
options on futures  contracts may, of  course, augment the  total return of  the
Fund  and thereby  provide a further  hedge against losses  resulting from price
declines in portions of the Fund's portfolio.
 
    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.
 
    LIMITATIONS ON FUTURES CONTRACTS AND OPTIONS  ON FUTURES.  The Fund may  not
enter into futures contracts or purchase 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. In  addition, in accordance with  the
regulations of the Commodity Futures Trading Commission ("CFTC") under which the
Fund  is exempted from registration  as a commodity pool  operator, the Fund may
only enter into futures contracts and options on futures contracts  transactions
for  purposes of hedging a part or all of its portfolio. If the CFTC changes its
regulations so that  the Fund  would be permitted  to write  options on  futures
contracts  for purposes other  than hedging the  Fund's investments without CFTC
registration, the  Fund may  engage  in such  transactions for  those  purposes.
Except  as described above, there are no other limitations on the use of futures
and options thereon by the Fund.
 
    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 held  by the Fund.  However, it is  possible
that  the futures  market may advance  and the  value of securities  held in the
portfolio of the Fund may decline. If  this occurred, the Fund would lose  money
on  the futures contract and also experience a decline in value of its portfolio
securities. However, while this could occur for a very brief period or to a very
small degree, over time the value of  a diversified portfolio will tend to  move
in the same direction as the futures contracts.
 
    If  the Fund purchases a  futures contract to hedge  against the increase in
value of  securities  it  intends to  buy,  and  the value  of  such  securities
decreases,  then  the 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 CFTC  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.
 
                                       19
<PAGE>
   
    If the Fund maintains a short position  in a futures contract or 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 underlying
the  futures contract or the  exercise price of the  option. Such a position may
also be covered by owning the securities underlying the futures contract (in the
case of a stock index futures  contract a portfolio of securities  substantially
replicating the relevant index), 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  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.
Transactions are  entered  into by  the  Fund  only with  brokers  or  financial
institutions deemed creditworthy by the Investment Manager.
 
    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 securities 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  securities  and futures
markets could  result.  Price distortions  could  also result  if  investors  in
futures  contracts opt to make or  take delivery of underlying securities rather
than engage  in closing  transactions  due to  the  resultant reduction  in  the
liquidity  of the futures  market. In addition,  due to the  fact that, from the
point of view of  speculators, the deposit requirements  in the futures  markets
are  less  onerous  than  margin  requirements  in  the  cash  market, increased
participation by speculators in the  futures market could cause temporary  price
distortions.  Due to the possibility of  price distortions in the futures market
and because of  the imperfect  correlation between  movements in  the prices  of
securities  and movements in the prices of futures contracts, a correct forecast
of stock price or interest rate trends  by the Investment Manager may still  not
result in a successful hedging transaction.
 
    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  securities  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 securities.
 
REPURCHASE AGREEMENTS
 
   
    When cash may be available  for only a few days,  it may be invested by  the
Fund in repurchase agreements until such time as it may otherwise be invested or
used  for payments of  obligations of the  Fund. These agreements,  which may be
viewed as  a  type  of  secured  lending by  the  Fund,  typically  involve  the
acquisition  by the Fund of debt securities from a selling financial institution
such as a  bank, savings and  loan association or  broker-dealer. The  agreement
provides  that  the  Fund  will  sell back  to  the  institution,  and  that the
institution  will  repurchase,  the  underlying  security  ("collateral")  at  a
specified  price and at a fixed time in  the future, usually not more than seven
days from  the  date  of  purchase.  The collateral  will  be  maintained  in  a
segregated  account and  will be  marked-to-market daily  to determine  that the
value of the collateral, as specified in the agreement, does not decrease  below
the  purchase price plus  accrued interest. If  such decrease occurs, additional
collateral will  be  requested and,  when  received,  added to  the  account  to
maintain  full  collateralization.  The  Fund  will  accrue  interest  from  the
institution until the time when the  repurchase is to occur. Although such  date
is  deemed by the  Fund to be the  maturity date of  a repurchase agreement, the
maturities of securities subject to repurchase agreements are not subject to any
limits.
    
 
    While repurchase agreements involve certain risks not associated with direct
investments in debt securities, the Fund follows procedures designed to minimize
such risks. These procedures include effecting repurchase transactions only with
large,  well-capitalized  and  well-established  financial  institutions   whose
financial  condition  will be  continually monitored  by the  Investment Manager
subject to procedures  established by  the Board of  Directors of  the Fund.  In
addition,  as  described  above,  the value  of  the  collateral  underlying the
repurchase agreement will be at least  equal to the repurchase price,  including
any  accrued interest  earned on  the repurchase  agreement. In  the event  of a
default or bankruptcy by a selling financial institution, the Fund will seek  to
liquidate  such  collateral.  However, the  exercising  of the  Fund's  right to
liquidate such collateral  could involve  certain costs  or delays  and, to  the
extent  that  proceeds  from  any  sale upon  a  default  of  the  obligation to
repurchase were less than the repurchase price, the Fund could suffer a loss. It
is the current policy of the Fund not to invest in repurchase agreements that do
not mature within  seven days if  any such investment,  together with any  other
illiquid assets held by the Fund, amounts to more than 15% of its total assets.
 
WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS
 
   
    From  time to  time the  Fund may  purchase securities  on a  when-issued or
delayed delivery  basis  or  may  purchase  or  sell  securities  on  a  forward
commitment  basis. When 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 commitment. While the Fund will only purchase securities
on a  when-issued,  delayed  delivery  or  forward  commitment  basis  with  the
intention  of acquiring the securities, the  Fund may sell the securities before
the settlement date, if it is  deemed advisable. The securities so purchased  or
sold  are subject to market  fluctuation and no interest  or dividends accrue to
the purchaser prior  to the  settlement date.  At the  time the  Fund makes  the
commitment  to purchase or sell securities on a when-issued, delayed delivery or
forward commitment basis, it will record the transaction and thereafter  reflect
the  value, each day, of such security purchased,  or if a sale, the proceeds to
be received, in determining its net asset value. At the time of delivery of  the
securities, their value may be more or less than the purchase or sale price. The
Fund  will also establish a segregated account  with its custodian bank in which
it will continually maintain cash or cash equivalents or other liquid  portfolio
securities   equal  in  value  to  commitments   to  purchase  securities  on  a
when-issued, delayed delivery  or forward  commitment basis.  During the  fiscal
year  ended  February  28, 1997,  the  Fund  did not  purchase  securities  on a
when-issued, delayed delivery or forward commitment basis.
    
 
                                       21
<PAGE>
WHEN, AS AND IF ISSUED SECURITIES
 
   
    The Fund may purchase securities on a  "when, as and if issued" basis  under
which  the issuance of the security depends  upon the occurrence of a subsequent
event,  such  as  approval  of  a  merger,  corporate  reorganization  or   debt
restructuring.  The commitment for the purchase of any such security will not be
recognized in the portfolio of the Fund until the Investment Manager  determines
that  issuance of the security  is probable. At 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  maintain  cash  or  cash
equivalents  or other liquid  portfolio securities equal  in value to recognized
commitments for such securities. 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").  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 Investment
Manager  and the Board of  Directors do not believe that  the net asset value of
the Fund will be adversely affected by its purchase of securities on such basis.
During the  fiscal year  ended February  28,  1997, the  Fund did  not  purchase
securities  on  a  "when,  as and  if  issued"  basis. The  Fund  may  also sell
securities on a "when, as and if issued" basis provided that the issuance of the
security will result automatically from the exchange or conversion of a security
owned by the Fund at the time of sale.
    
 
PRIVATE PLACEMENTS
 
    The Fund may invest  up to 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, or  which are  otherwise not  readily
marketable.  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 recently adopted Rule 144A  under
the  Securities  Act of  1933, which  will  permit the  Fund to  sell restricted
securities to qualified  institutional buyers without  limitation. The Board  of
Directors  of the  Fund will make  a determination  as to the  liquidity of each
restricted  security  purchased  by  the  Fund.  If  a  restricted  security  is
determined  to  be  "liquid," such  security  will  not be  included  within the
category "illiquid securities," which under current policy may not exceed 15% of
the Fund's total  assets. The  Rule 144A  marketplace of  sellers and  qualified
institutional  buyers is new and still developing  and may take a period of time
to develop into a mature liquid market. As such, the market for certain  private
placements  purchased  pursuant to  Rule  144A may  be  initially small  or may,
subsequent to purchase, become illiquid. Furthermore, the Investment Manager may
not be possessed of all the  information concerning an issue of securities  that
it wishes to purchase in a private placement to which it would normally have had
access,  had the registration  statement necessitated by  a public offering been
filed with the Securities and Exchange Commission. During the fiscal year  ended
February 28, 1997, the Fund did not purchase any restricted securities.
    
 
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 of the Fund, if  the holders of more  than
50%  of the outstanding shares are present  or represented by proxy; or (b) more
than 50% of the outstanding  shares of the Fund.  For purposes of the  following
restrictions:  (i) all percentage limitations apply immediately after a purchase
or initial  investment;  and  (ii)  any  subsequent  change  in  any  applicable
percentage  resulting from market fluctuations or  other changes in total or net
assets does not require elimination of any security from the portfolio.
 
                                       22
<PAGE>
    The Fund may not:
 
          1.  Invest in  securities of any  issuer if, to  the knowledge of  the
    Fund,  any officer or director of the Fund or of the Investment Manager owns
    more than 1/2 of 1% of the  outstanding securities of such issuer, and  such
    officers and directors who own more than 1/2 of 1% own in the aggregate more
    than 5% of the outstanding securities of such issuer.
 
          2.    Purchase or  sell real  estate  or interests  therein (including
    limited partnership interests), although the Fund may purchase securities of
    issuers which  engage in  real estate  operations and  securities which  are
    secured by real estate or interests therein.
 
          3.  Purchase or sell commodities except that the Fund may purchase and
    sell futures contracts and related options.
 
          4.    Purchase oil,  gas or  other mineral  leases, rights  or royalty
    contracts or exploration or development  programs, except that the Fund  may
    invest  in the securities of companies  which operate, invest in, or sponsor
    such programs.
 
          5.   Purchase  securities of  other  investment companies,  except  in
    connection  with a  merger, consolidation, reorganization  or acquisition of
    assets.
 
          6.  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).
 
          7.   Pledge its assets or assign  or otherwise encumber them except to
    secure borrowings effected within the  limitations set forth in  restriction
    (6).  (To meet the requirements of  regulations in certain states, the Fund,
    as a matter of operating policy but not as a fundamental policy, will  limit
    any  pledge of its assets to 4.5% of its net assets so long as shares of the
    Fund are being sold in those states.) For the purposes 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.
 
          8.   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) borrowing  money in accordance
    with restrictions described above; or (c) lending portfolio securities.
 
          9.  Make loans of money or securities, except: (a) by the purchase  of
    debt obligations in which the Fund may invest consistent with its investment
    objective  and policies; (b) by investment  in repurchase agreements; or (c)
    by lending its portfolio securities.
 
         10.  Make short sales of securities.
 
         11.  Purchase securities on margin, except for such short-term loans as
    are necessary for the  clearance of purchases  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.
 
         12.   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 and then  only in an aggregate amount not
    to exceed 5% of the Fund's total assets.
 
         13.  Invest for the purpose of exercising control or management of  any
    other issuer.
 
    In  addition, the  Fund, as a  non-fundamental policy, will  not invest more
than 5% of the value of its net  assets in warrants, including not more than  2%
of  such  assets  in warrants  not  listed on  the  New York  or  American Stock
Exchange. However, the acquisition of  warrants attached to other securities  is
not subject to this restriction.
 
                                       23
<PAGE>
PORTFOLIO TRANSACTIONS AND BROKERAGE
- --------------------------------------------------------------------------------
 
   
    Subject to the general supervision of the Board of Directors, the Investment
Manager  is responsible for decisions  to buy and sell  securities for the Fund,
the selection  of  brokers and  dealers  to  effect the  transactions,  and  the
negotiation  of brokerage commissions, if any. Purchases and sales of securities
on a stock  exchange are effected  through brokers who  charge a commission  for
their  services. In the over-the-counter market, securities are generally traded
on a "net" basis with dealers acting as principal for their own accounts without
a stated  commission, although  the price  of the  security usually  includes  a
profit to the dealer. The Fund also expects that securities will be purchased at
times  in  underwritten offerings  where the  price includes  a fixed  amount of
compensation, generally referred to as the underwriter's concession or discount.
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.  For the fiscal years  ended February 28, 1995,  February
29,  1996 and February 28, 1997, the Fund paid a total of $373,465, $270,398 and
$986,176, respectively, in brokerage commissions.
    
 
   
    The Investment Manager currently serves as investment manager or adviser  to
a number of clients, including other investment companies, and may in the future
act  as  investment manager  or adviser  to others.  It is  the practice  of the
Investment Manager to cause purchase and sale transactions to be allocated among
the Fund  and  others  whose assets  it  manages  in such  manner  as  it  deems
equitable.  In making such allocations among the Fund and other client accounts,
various  factors  may  be   considered,  including  the  respective   investment
objectives,  the relative size  of portfolio holdings of  the same or comparable
securities, the  availability of  cash for  investment, the  size of  investment
commitments  generally  held and  the opinions  of  the persons  responsible for
managing the portfolios of the  Fund and other client  accounts. In the case  of
certain  initial  and secondary  public  offerings, the  Investment  Manager may
utilize a  pro-rata  allocation based  on  the size  of  the Dean  Witter  Funds
involved and the number of shares available from the public offering.
    
 
    The  policy of the Fund regarding purchases  and sales of securities for its
portfolio is that  primary consideration  will be  given to  obtaining the  most
favorable  prices and efficient executions of transactions. Consistent with this
policy, when  securities transactions  are  effected on  a stock  exchange,  the
Fund's  policy is  to pay commissions  which are considered  fair and reasonable
without necessarily determining that the lowest possible commissions are paid in
all circumstances.  The Fund  believes that  a requirement  always to  seek  the
lowest  possible commission cost could impede effective portfolio management and
preclude the Fund and  the Investment Manager from  obtaining a high quality  of
brokerage  and research services. In seeking  to determine the reasonableness of
brokerage 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.
 
   
    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 price  and execution  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.  During  the
fiscal  year ended February 28, 1997, the  Fund directed the payment of $708,839
in brokerage commissions in connection with transactions in the aggregate amount
of $320,174,825 to brokers because of research services provided.
    
 
    Consistent with  the  policy  described  above,  brokerage  transactions  in
securities listed on exchanges or admitted to unlisted trading privileges may be
effected  through DWR. In order for DWR to effect any portfolio transactions for
the Fund, the commissions,  fees or other remuneration  received by DWR must  be
reasonable and fair compared to the commissions, fees or other remuneration paid
to other brokers in connection with
 
                                       24
<PAGE>
   
comparable  transactions involving similar securities being purchased or sold on
an exchange during a comparable period of time. This standard would allow DWR to
receive no more than the remuneration which would be expected to be received  by
an  unaffiliated broker in a commensurate arm's-length transaction. Furthermore,
the Directors of the  Fund, including a  majority of the  Directors 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 DWR are consistent with the foregoing standard. During  the
fiscal  years ended February 28, 1995, February  29, 1996 and February 28, 1997,
the Fund  paid  a total  of  $84,230,  $88,566 and  $263,065,  respectively,  in
brokerage  commissions to DWR.  The Fund does  not reduce the  management fee it
pays to the Investment Manager by any amount of the brokerage commissions it may
pay to DWR. During the year  ended February 28, 1997, the brokerage  commissions
paid  to DWR represented approximately 26.68% 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 41.27% of the aggregate  dollar
value  of  all portfolio  transactions of  the  Fund during  the year  for which
commissions were paid.
    
 
   
    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. During its fiscal year ended February 28, 1997, the Fund did
not effect any principal transactions with DWR.
    
 
    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 Fund does not reduce the management fee it
pays to the Investment  Manager by any  amount that may  be attributable to  the
value of such services.
 
PORTFOLIO TRADING
   
    It  is anticipated that  the Fund's portfolio turnover  rate will not exceed
200% during the fiscal year ending February 28, 1998. A 200% turnover rate would
occur, for  example, if  200% 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 February
29, 1996 and February 28, 1997, the Fund's portfolio turnover rates were 49% and
156%, respectively. The portfolio turnover rate was higher than anticipated  for
the  fiscal year ended February 28, 1997  becuase of the increased volatility in
the resources market for such period.
    
 
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  an  indirect wholly-owned  subsidiary  of  DWDC.  The
Directors  of the Fund, including  a majority of the  Directors who are not, and
were not at the time they voted,  interested persons of the Fund, as defined  in
the  Act  (the  "Independent Directors"),  approved,  at their  meeting  held on
October 30,  1992,  a  Distribution  Agreement  (the  "Distribution  Agreement")
appointing  the  Distributor  exclusive  distributor of  the  Fund's  shares and
providing for the  Distributor to bear  distribution expenses not  borne by  the
Fund.  The Distribution Agreement took effect on June 30, 1993 upon the spin-off
by Sears, Roebuck  & Co.  of its  remaining shares of  DWDC. By  its terms,  the
Distribution  Agreement had an initial term  ending April 30, 1994, and provides
that it will remain in  effect from year to year  thereafter if approved by  the
Board.  At their  meeting held  on April  24, 1997,  the Directors,  including a
majority of the Independent Directors, approved a new Distribution Agreement, to
take effect upon the proposed merger of DWDC with Morgan Stanley Group Inc. (see
"The Fund and its Management" in  the Prospectus), and approved continuation  of
the  present  Distribution Agreement  until  the earlier  of  April 30,  1998 or
consummation  of  the  proposed  merger.  The  new  Distribution  Agreement   is
substantially  identical  to  the  present Agreement  except  for  its  dates of
effectiveness and termination.
    
 
                                       25
<PAGE>
    The  Distributor bears all expenses it may incur in providing services under
the Distribution Agreement. Such expenses include the payment of commissions for
sales of the Fund's shares and incentive compensation to account executives. The
Distributor also pays certain  expenses in connection  with the distribution  of
the  Fund's shares, including the costs  of preparing, printing and distributing
advertising or promotional materials, and the costs of printing and distributing
prospectuses and supplements thereto  used in connection  with the offering  and
sale  of the  Fund's shares.  The Fund bears  the costs  of initial typesetting,
printing and distribution of prospectuses and supplements thereto to prospective
shareholders. The Fund  also bears  the costs of  registering the  Fund and  its
shares  under federal  and state securities  laws. The Fund  and the Distributor
have agreed  to  indemnify each  other  against certain  liabilities,  including
liabilities under the Securities Act of 1933, as amended. Under the Distribution
Agreement,  the Distributor uses  its best efforts in  rendering services to the
Fund, but in the absence of willful misfeasance, bad faith, gross negligence  or
reckless disregard of its obligations, the Distributor is not liable to the Fund
or  any of its shareholders for any error  of judgement 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  the Fund pays the Distributor  compensation
accrued  daily and payable monthly at the annual  rate of 1.0% of the lesser of:
(a) the  average daily  aggregate gross  sales of  the Fund's  shares since  the
inception  of the Plan on July 2, 1984 (not including reinvestments of dividends
or capital  gains distributions),  less the  average daily  aggregate net  asset
value  of the  Fund's shares  redeemed since the  Plan'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  the Fund attributable to
shares issued, net of related shares redeemed, since inception of the plan.  The
Distributor  also  receives the  proceeds of  contingent deferred  sales charges
imposed on certain  redemptions of  shares, which  are separate  and apart  from
payments  made  pursuant  to  the  Plan  (see  "Redemptions  and  Repurchases --
Contingent Deferred  Sales  Charge"  in the  Prospectus).  The  Distributor  has
informed the Fund that it received approximately $177,000, $184,694 and $151,113
in  contingent deferred  sales charges for  the fiscal years  ended February 28,
1995, February 29, 1996 and February  28, 1997, respectively, none of which  was
retained by the Distributor.
    
 
   
    The  Distributor has informed the Fund that a portion of the fees payable by
the Fund each year  pursuant to the  Plan equal to 0.25%  of the Fund's  average
daily  net assets, is characterized  as a "service fee"  under the Rules of Fair
Practice of  the  National  Association  of Securities  Dealers  (of  which  the
Distributor is a member). Such portion of the fee is a payment made for personal
service and/or the maintenance of shareholder accounts. The remaining portion of
the  Plan of Distribution fee  payments made by the  Fund is characterized as an
"asset-based  sales  charge"  pursuant  to  the  aforementioned  Rules  of  Fair
Practice.  At their meeting held on October 26, 1995, the Directors of the Fund,
including all of the Independent 12b-1  Directors, 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.
    
 
   
    The  Plan  was  originally  adopted  by a  majority  vote  of  the  Board of
Directors, including all of  the Directors who are  not "interested persons"  of
the Fund, as defined in the Act, (the "Independent Directors"), none of whom had
or  have any direct or indirect financial  interest in the operation of the Plan
(the "Independent 12b-1 Directors"), cast in person at a meeting called for  the
purpose  of  voting on  the Plan,  on April  16, 1984,  and by  the shareholders
holding a majority,  as defined in  the Act,  of the outstanding  shares of  the
Fund, at the Fund's Annual Meeting of Stockholders held on June 22, 1984.
    
 
    At  their  meeting held  on October  30,  1992, the  Directors of  the Fund,
including all of the Independent 12b-1 Directors, approved certain amendments to
the Plan which took  effect in January,  1993 and were  designed to reflect  the
fact  that  upon  the  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.
 
                                       26
<PAGE>
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.
 
   
    Pursuant  to the Plan, and as required  by Rule 12b-1, the Distributor shall
provide the Fund, for review by  the Directors, and the Directors shall  review,
at  least quarterly, a written report of the amounts expended under the Plan and
the purpose for which such expenditures  were made. The Fund accrued  $1,910,070
to the Distributor, pursuant to the Plan, for the fiscal year ended February 28,
1997.
    
 
    The  Plan was adopted  in order to  permit the implementation  of the Fund's
method of distribution. Under  this distribution method shares  of the Fund  are
sold  without a sales load  being deducted at the time  of purchase, so that the
full amount of an investor's purchase payment will be invested in shares without
any deduction  for  sales charges.  Shares  of the  Fund  may be  subject  to  a
contingent deferred sales charge, payable to the Distributor, if redeemed during
the  six years after  their purchase. DWR compensates  its account executives by
paying them, from its own funds, commissions for the sale of the Fund's  shares,
currently  a gross sales  credit of up  to 5% of  the amount sold  and an annual
residual commission of up to .25 of 1%  of the current value of the amount  sold
(not  including reinvested dividends and  distributions). 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. The  distribution fee that  the Distributor receives
from the Fund under the Plan, in effect, offsets distribution expenses  incurred
on  behalf of  the Fund  and DWR's  opportunity costs,  such as  the gross sales
credit and  an  assumed interest  charge  thereon ("carrying  charge").  In  the
Distributor's  reporting  of distribution  expenses  to the  Fund,  such assumed
interest (computed at the "broker's call rate") has been calculated on the gross
sales credit as it is reduced by  amounts received by the Distributor under  the
Plan  and any contingent deferred sales charges received by the Distributor upon
redemption of shares  of the Fund.  No other  interest charge is  included as  a
distribution  expense in the Distributor's calculation of its distribution costs
for this  purpose.  The broker's  call  rate is  the  interest rate  charged  to
securities brokers on loans secured by exchange-listed securities.
 
   
    The  Fund paid 100% of the $1,910,070  accrued under the Plan for the fiscal
year ended  February  28, 1997  to  the  Distributor. The  Distributor  and  DWR
estimate  that they have spent,  pursuant to the Plan,  $25,159,477 on behalf of
the Fund since the inception of the  Plan. It is estimated that this amount  was
spent   in  approximately  the  following   ways:  (i)  12.23%  ($3,076,810)  --
advertising and  promotional  expenses; (ii)  1.32%  ($333,300) --  printing  of
prospectuses  for  distribution to  other than  current shareholders;  and (iii)
86.45% ($21,749,367) -- other expenses, including the gross sales credit and the
carrying charge,  of  which  11.58% ($2,518,440)  represents  carrying  charges,
35.69%  ($7,761,602)  represents commission  credits to  DWR branch  offices for
payments  of  commissions  to   account  executives  and  52.73%   ($11,469,325)
represents overhead and other branch office distribution-related expenses.
    
 
   
    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
the excess  distribution expenses,  including the  carrying charge  designed  to
approximate  the opportunity  costs incurred by  DWR which arise  from it having
advanced monies without having received the amount of any sales charges  imposed
at the time of sale of the Fund's shares, totalled $6,803,658 as of February 28,
1997,  which amount  constitutes 2.74%  of the Fund's  net assets  on such date.
Because there  is  no  requirement  under  the  Plan  that  the  Distributor  be
reimbursed  for all its expenses  or any requirement that  the Plan be continued
from year to year,  this excess amount  does not constitute  a liability of  the
Fund.  Although  there is  no  legal obligation  for  the Fund  to  pay expenses
incurred by the Distributor 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
Directors 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.
    
 
                                       27
<PAGE>
   
    No interested person of the Fund nor any Director of the Fund who is not  an
interested person of the Fund, as defined in the Act, had 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 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.
    
 
   
    Under its  terms,  the Plan  will  continue in  effect  from year  to  year,
provided such continuance is approved annually by a vote of the Directors in the
manner  described above. Continuance of  the Plan for one  year, until April 30,
1998, was approved by the Board of  Directors of the Fund, including a  majority
of  the Independent 12b-1 Directors, at a  Board meeting held on April 24, 1997.
At their meeting held on April 28, 1993, the Directors of the Fund, including  a
majority  of the  Independent 12b-1  Directors, also  approved certain technical
amendments to the  Plan in connection  with amendments adopted  by the  National
Association  of  Securities Dealers  to  its Rules  of  Fair Practice.  Prior to
approving the continuation of  the Plan, the Board  requested and received  from
DWR  and reviewed all the information which  it deemed necessary to arrive at an
informed determination. In making their determination to continue the Plan,  the
Directors  considered: (1) the Fund's experience under the Plan and whether such
experience indicates that the Plan is operating as anticipated; (2) the benefits
the Fund had obtained,  was obtaining and  would be likely  to obtain under  the
Plan; and (3) what services had been provided and were continuing to be provided
under  the Plan by the Distributor to  the Fund and its stockholders. Based upon
their review, the Directors of the Fund, including each of the Independent 12b-1
Directors, 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 Directors' quarterly review of the
Plan, they  will  consider  its  continued  appropriateness  and  the  level  of
compensation provided therein.
    
 
    The  Plan may not be  amended to increase materially  the amount to be spent
for the services described therein without  approval of the shareholders of  the
Fund,  and all  material amendments  of the  Plan must  also be  approved by the
Directors 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 Directors who  are
not  interested persons of the Fund and who have no direct or indirect financial
interest in  the operation  of the  Plan, 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 Directors shall be
committed to the discretion of the Independent Directors.
 
DETERMINATION OF NET ASSET VALUE
 
    The  net asset value per share of the  Fund is determined once daily at 4:00
p.m., New York time (or, on days  when the New York Stock Exchange closes  prior
to  4 p.m., at such earlier time), on  each day that the New York Stock Exchange
is open  by  taking  the value  of  all  assets of  the  Fund,  subtracting  its
liabilities,  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,  Presidents'   Day,  Good  Friday,  Memorial  Day,
Independence Day, Labor Day, Thanksgiving Day, and Christmas Day.
 
    As stated  in  the Prospectus,  short-term  debt securities  with  remaining
maturities  of 60 days or  less at the time of  purchase are valued at amortized
cost, unless  the Directors  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  Directors  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 Directors. Listed options on debt securities are
valued at the latest sale price on the exchange on which they are listed  unless
no  sales of such options have taken place  that day, in which case they will be
valued at the mean between their  latest bid and asked prices. Unlisted  options
on  debt securities and all options on  equity securities are valued at the mean
between their latest bid and asked prices. Futures are valued at the latest sale
price on  the commodities  exchange on  which they  trade unless  the  Directors
determine that such price does not reflect their market
 
                                       28
<PAGE>
value,  in which case they  will be valued at their  fair value as determined by
the Directors. 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 Directors.
 
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 Dean  Witter
Trust  Company (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  stock certificate. If a stock certificate is desired, it must be requested in
writing for each transaction. Certificates are  issued only for full shares  and
may  be  redeposited in  the account  at any  time.  There is  no charge  to the
investor for  issuance  of  a certificate.  Whenever  a  shareholder  instituted
transaction  takes place in the  Shareholder Investment Account, the shareholder
will be mailed a written 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  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 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.
 
   
    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 an open-end Dean Witter Fund other than Dean
Witter Natural Resource Development Securities. Such investment will be made  as
described above for automatic investment in shares 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 Dean Witter Fund targeted
to receive  investments from  dividends  at the  time  they enter  the  Targeted
Dividends  program. Investors should review the  prospectus of the targeted Dean
Witter Fund before entering the program.
    
 
   
    EASYINVEST-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, 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.  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 at net asset  value 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.
 
                                       29
<PAGE>
    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 contingent deferred sales charge  will be imposed on shares  redeemed
under  the  Withdrawal  Plan  (see "Redemptions  and  Repurchases  -- Contingent
Deferred  Sales  Charge"   in  the  Prospectus).   Therefore,  any   shareholder
participating  in the Withdrawal Plan will  have sufficient shares redeemed from
his or  her account  so that  the  proceeds (net  of any  applicable  contingent
deferred  sales charge)  to the  shareholder will  be the  designated monthly or
quarterly amount.
 
    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
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  the contingent  deferred  sales  charge
applicable  to the redemption of shares purchased during the preceding six years
(see "Redemptions and Repurchases -- Contingent Deferred Sales Charge").
 
    Any shareholder who wishes to have  payments under the Withdrawal Plan  made
to  a third party or sent to an address other than the one listed on the account
must send complete written instructions to  the Transfer Agent to enroll in  the
Withdrawal  Plan.  The  shareholder's  signature on  such  instructions  must be
guaranteed  by  an   eligible  guarantor  acceptable   to  the  Transfer   Agent
(shareholders  should  contact  the Transfer  Agent  for a  determination  as to
whether a particular institution is  such an eligible guarantor). A  shareholder
may,  at any time, change the amount and interval of withdrawal payments through
his or her account executive or  by written notification to the Transfer  Agent.
In  addition, the  party and/or the  address to  which checks are  mailed may be
changed by written notification to the Transfer Agent, with signature guarantees
required in the manner described above.  The shareholder may also terminate  the
Withdrawal  Plan at  any time by  written notice  to the Transfer  Agent. In the
event  of  such  termination,  the  account  will  be  continued  as  a  regular
shareholder  investment account. The shareholder may  also redeem all or part of
the  shares  held  in  the   Withdrawal  Plan  account  (see  "Redemptions   and
Repurchases") at any time.
 
    DIRECT  INVESTMENTS THROUGH TRANSFER AGENT.  As discussed in the Prospectus,
a shareholder may  make additional  investments in Fund  shares at  any time  by
sending  a  check in  any amount,  not less  than $100,  payable to  Dean Witter
Natural Resource Development  Securities Inc., directly  to the Fund's  Transfer
Agent.  Such amounts 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 the Fund may exchange their shares
for shares of  other Dean  Witter Funds sold  with a  contingent deferred  sales
charge  ("CDSC funds"), and  for shares of Dean  Witter Short-Term U.S. Treasury
Trust, Dean Witter Intermediate  Term U.S. Treasury  Trust, Dean Witter  Limited
Term  Municipal Trust,  Dean Witter Short-Term  Bond Fund,  Dean Witter Balanced
Income Fund, Dean Witter Balanced Growth Fund, and
 
                                       30
<PAGE>
for five Dean Witter  Funds which are money  market funds (the foregoing  eleven
non-CDSC  funds  are  hereinafter  collectively  referred  to  as  the "Exchange
Funds"). Exchanges may be made after the shares of the Fund acquired by purchase
(not by exchange or dividend reinvestment) have been held for thirty days. There
is no waiting period  for exchanges of shares  acquired by exchange or  dividend
reinvestment.  An exchange 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  captions "Exchange
Privilege" and "Contingent Deferred Sales  Charge," a contingent deferred  sales
charge  ("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 the  Fund or any
other CDSC fund 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 the Fund. However, in the case of shares of the  Fund
exchanged into an Exchange Fund on or after April 23, 1990, upon a redemption of
shares which results in a CDSC being imposed, a credit (not to exceed the amount
of  the  CDSC) will  be given  in an  amount  equal to  the Exchange  Fund 12b-1
distribution fees incurred on or after that date which are attributable to those
shares. Shareholders  acquiring shares  of  an Exchange  Fund pursuant  to  this
exchange  privilege  may  exchange those  shares  back  into the  Fund  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 CDSC fund  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  CDSC
fund.
 
    In  addition, shares of the  Fund may be acquired  in exchange for shares of
Dean Witter Funds sold  with a front-end sales  charge ("front-end sales  charge
funds")  but shares  of the  Fund, however  acquired, may  not be  exchanged for
shares of  front-end sales  charge funds.  Shares  of a  CDSC fund  acquired  in
exchange  for shares of a front-end sales charge fund (or in exchange for shares
of other Dean Witter  Funds for which  shares of a  front-end sales charge  fund
have been exchanged) are not subject to any CDSC upon their redemption.
 
    When  shares initially purchased in a CDSC  fund are exchanged for 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 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 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  (all  such shares  called "Free  Shares"),  will be  exchanged first.
Shares of Dean Witter American Value Fund (formerly Dean Witter  Industry-Valued
Securities  Inc.) acquired prior to April 30,  1984, shares of the Fund and Dean
Witter Dividend  Growth Securities  Inc. acquired  prior to  July 2,  1984,  and
shares  of Dean Witter Strategist  Fund acquired prior to  November 8, 1989, are
also considered Free Shares and will be  the first Free Shares to be  exchanged.
After   an   exchange,  all   dividends  earned   on   shares  in   an  Exchange
 
                                       31
<PAGE>
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 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
"Contingent Deferred Sales Charge," 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.
 
   
    Exchanges  are subject to  the minimum investment  requirement and any other
conditions imposed by each fund. (The  minimum initial investment is $5,000  for
Dean  Witter Liquid  Asset Fund Inc.,  Dean Witter Tax-Free  Daily Income Trust,
Dean Witter New  York Municipal Money  Market Trust and  Dean Witter  California
Tax-Free  Daily  Income Trust  although those  funds  may, at  their discretion,
accept initial investments of as low  as $1,000. The minimum initial  investment
for  Dean  Witter  Short-Term  U.S.  Treasury  Trust  is  $10,000.  The  minimum
investment for Dean  Witter Special Value  Fund is $5,000.  The minimum  initial
investment  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 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
 
                                       32
<PAGE>
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.
 
    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. 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.
 
    For further  information  regarding  the  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 the Fund can be redeemed
for cash at any time at the net asset value per share next determined;  however,
such  redemption  proceeds  may  be  reduced by  the  amount  of  any applicable
contingent deferred  sales  charges  (see  below).  If  shares  are  held  in  a
shareholder's  account  without  a  share  certificate,  a  written  request for
redemption to the Fund's Transfer Agent at  P.O. Box 983, Jersey City, NJ  07303
is  required. If  certificates are  held by the  shareholder, the  shares may be
redeemed by surrendering the certificates with a written request for redemption.
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. Any redemption request received after such computation  will
be  redeemed at the next determined net asset value. The Term "good order" means
that the share  certificate, if  any, and  request for  redemption are  properly
signed,  accompanied by  any documentation required  by the  Transfer Agent, and
bear signature guarantees when  required by the Fund  or the Transfer Agent.  If
redemption  is requested by a corporation,  partnership, trust or fiduciary, the
Transfer Agent may require that written evidence of authority acceptable to  the
Transfer Agent be submitted before such request is accepted.
 
   
    Whether  certificates are held  by the shareholder  or shares are  held in a
shareholder's account, if the proceeds are to  be paid to any person other  than
the record owner, or if the proceeds are to be paid to a corporation (other than
the Distributor or a selected broker-dealer for the account of the shareholder),
partnership,  trust or fiduciary, or sent to the shareholder at an address other
than the  registered  address, signatures  must  be guaranteed  by  an  eligible
guarantor  acceptable  to the  Transfer Agent  (shareholders should  contact the
Transfer Agent for  a determination as  to whether a  particular institution  is
such  an eligible guarantor). A  stock power may be  obtained from any dealer or
commercial bank. The Fund may  change the signature guarantee requirements  from
time  to time upon notice to shareholders, which may be by means of a supplement
to the prospectus or a new prospectus.
    
 
   
    CONTINGENT DEFERRED SALES CHARGE.  As stated in the Prospectus, a contingent
deferred sales charge ("CDSC") will be imposed on any redemption by an  investor
if,  after such redemption,  the current value  of the investor's  shares of the
Fund is less than the dollar amount  of all payments by the shareholder for  the
purchase of Fund shares during the preceding six 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
prior  to  the  redemption, plus  (b)  the  current net  asset  value  of shares
purchased through  reinvestment of  dividends or  distributions of  the Fund  or
another  Dean Witter  Fund (see  "Shareholder Services  -- Targeted Dividends"),
plus   (c)   the   current   net    asset   value   of   shares   acquired    in
    
 
                                       33
<PAGE>
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 years. The CDSC will be  paid to the Distributor. In addition,  no
CDSC  will be imposed on  redemptions of shares which  were purchased by certain
Unit Investment Trusts  (on which a  sales charge  has been paid)  or which  are
attributable to reinvestment of dividends or distributions from, or the proceeds
of, such Unit Investment Trusts.
 
    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 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  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 the
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 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 Fund  shares 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:
 
<TABLE>
<CAPTION>
                                         CONTINGENT
                                          DEFERRED
            YEAR SINCE                  SALES CHARGE
             PURCHASE                AS A PERCENTAGE OF
           PAYMENT MADE               AMOUNT REDEEMED
- -----------------------------------  ------------------
<S>                                  <C>
First..............................         5.0%
Second.............................         4.0%
Third..............................         3.0%
Fourth.............................         2.0%
Fifth..............................         2.0%
Sixth..............................         1.0%
Seventh and thereafter.............         None
</TABLE>
 
    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 period. This will result in  any such CDSC being imposed at
the  lowest  possible  rate.  Accordingly,  shareholders  may  redeem,   without
incurring  any CDSC,  amounts equal to  any net  increase in the  value of their
shares above the  amount of  their purchase payments  made within  the past  six
years  and amounts equal to the current  value of shares purchased more than six
years prior  to the  redemption  and shares  purchased through  reinvestment  of
dividends  or distributions  or 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.  The CDSC will  be
imposed, in accordance with the table shown above, on any redemptions within six
years of purchase which are in excess of these amounts and which redemptions are
not  (a)  requested  within  one  year  of  death  or  initial  determination of
disability  of  a  shareholder,  or   (b)  made  pursuant  to  certain   taxable
distributions  from retirement plans or retirement accounts, as described in the
Prospectus.
 
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment for shares presented for repurchase or redemption will be made by  check
within  seven days after receipt by the Transfer Agent of the certificate and/or
written request in good  order. Such payment  may be postponed  or the right  of
redemption suspended 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
 
                                       34
<PAGE>
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 certified  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  investment of  the check  by the  Transfer
Agent).  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  investment 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.
 
    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  contingent deferred sales charge  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 shares to be transferred will be determined by using
the same  order  as  used  in processing  a  redemption  (see  "Redemptions  and
Repurchases"  in the  Prospectus). The  transferred shares  will continue  to be
subject to any applicable  contingent deferred sales charge  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  30 days after  the date of
redemption or repurchase, reinstate any portion  or all of the proceeds of  such
redemption  or repurchase  in shares  of the  Fund at  the net  asset value next
determined after a reinstatement request 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.
 
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 shareholders will be able to claim their share of the tax paid
by the Fund as a credit against their individual federal income tax.
 
   
    Because the Fund intends to distribute all of its net investment income  and
capital  gains to shareholders and otherwise  continue to qualify as a regulated
investment company under Subchapter  M of the Internal  Revenue Code, it is  not
expected  that  the  Fund  will  be required  to  pay  any  federal  income tax.
Shareholders will  normally have  to pay  federal income  taxes, and  any  state
and/or  income taxes, on  the dividends and distributions  they receive from the
Fund. Such dividends and distributions, to the extent that they are derived from
net  investment  income  or  short-term  capital  gains,  are  taxable  to   the
shareholder  as ordinary income  regardless of whether  the shareholder receives
such payments in  additional shares or  in cash. Any  dividends declared in  the
last  quarter of any calendar year which are paid in the following year prior to
February 1 will  be deemed  received by the  shareholder in  the prior  calendar
year.
    
 
    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 gains or losses.
 
                                       35
<PAGE>
    The  Fund  has qualified  and  intends to  remain  qualified as  a regulated
investment company under Subchapter M of  the Internal Revenue Code of 1986.  If
so  qualified, the  Fund will not  be subject to  federal income tax  on its net
investment income  and  net short-term  and  long-term capital  gains,  if  any,
realized  during any fiscal year in which it distributes such income and capital
gains to its shareholders. Distributions of net long-term capital gains, if any,
are taxable to shareholders as long-term capital gains regardless of how long  a
shareholder   has  held  the  Fund's  shares   and  regardless  of  whether  the
distribution is  received  in  additional  shares  or  in  cash.  Capital  gains
distributions are not eligible for the dividends received deduction.
 
    Dividends  and  interest  received  by  the  Fund  with  respect  to foreign
securities in its portfolio 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.
 
    Any  dividend or capital  gains distribution received  by a shareholder from
any investment company will have the effect  of reducing the net asset value  of
the  shareholder's stock in that company by  the exact amount of the dividend or
capital gains distribution.  Furthermore, capital gains  distributions and  some
portion  of the dividends are subject to  federal income taxes. If the net asset
value of the shares should be reduced below a shareholder's cost as a result  of
the  payment  of dividends  or the  distribution  of realized  long-term capital
gains, such payment or distribution would be a return of capital but nonetheless
would be taxable to the shareholder. Therefore, an investor should consider  the
tax  implications of purchasing Fund shares  immediately prior to a distribution
record date.
 
    Dividend payments  will  be  eligible for  the  federal  dividends  received
deduction  available to the Fund's corporate shareholders only to the extent the
aggregate dividends received by the Fund would be eligible for the deduction  if
the  Fund were  the shareholder claiming  the dividends  received deduction. 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 had held to
a minimum period, usually 46 days. Any  distributions made by the Fund will  not
be  eligible for the  dividends received deduction with  respect to shares which
are held by  the shareholder for  45 days  or less. 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.
 
    After  the end of  the year, shareholders  will be sent  full information on
their dividends  and capital  gains distributions  for tax  purposes,  including
information as to the portion taxable as ordinary income, the portion taxable as
long-term  capital gains  and the  portion eligible  for the  dividends received
deduction. 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 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. 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. The ending redeemable
value is reduced by any contingent deferred sales charge 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.
 
                                       36
<PAGE>
   
    The average annual total returns of the Fund for the year ended February 28,
1997, the  five years  ended February  28, 1997,  and for  the ten  years  ended
February 28, 1997, were 15.88%, 13.29% and 10.56%, respectively.
    
 
   
    In  addition to the foregoing, the Fund  may advertise its total return over
different periods of time by means of aggregate, average, year-by-year or  other
types  of total  return figures.  Such calculations may  or may  not reflect the
deduction of the  contingent deferred  sales charge which,  if reflected,  would
reduce the performance quoted. For example, the average total return of the Fund
may  be  calculated in  the  manner described  in  the preceding  paragraph, but
without deduction of any applicable  contingent deferred sales charge. Based  on
this  calculation, the  average annual  total returns of  the Fund  for the year
ended February 28, 1997, for the five years ended February 28, 1997, and for the
ten years ended February 28, 1997, were 20.88%, 13.53% and 10.56%, respectively.
    
 
   
    In addition, the Fund may compute  its aggregate total return 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  contingent deferred  sales  charge) by  the  initial  $1,000
investment   and  subtracting  1  from  the   result.  Based  on  the  foregoing
calculation, the Fund's total returns for the year ended February 28, 1997,  the
five  years ended February 28, 1997, and  the ten years ended February 28, 1997,
were 20.88%, 88.58% and 172.77%, respectively.
    
 
   
    The Fund  may  also advertise  the  growth of  hypothetical  investments  of
$10,000,  $50,000 and $100,000 in  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 $10,000, $50,000
and $100,000.  Investments of  $10,000,  $50,000 and  $100,000  in the  Fund  at
inception  would have grown  to $32,335, $161,675  and $323,350, respectively at
February 28, 1997.
    
 
    The Fund from time  to time may also  advertise its performance relative  to
certain performance rankings and indexes compiled by independent organizations.
 
SHARES OF THE FUND
- --------------------------------------------------------------------------------
 
    The  Fund is authorized to issue 500,000,000 shares of common stock of $0.01
par value. Shares of the Fund, when issued, are fully paid, nonassessable, fully
transferable and redeemable at the option  of the holder. Except for  agreements
entered  into  by  the  Fund  in its  ordinary  course  of  business  within the
limitations of the Fund's fundamental investment policies (which may be modified
only by shareholder  vote), the Fund  will not issue  any securities other  than
common stock.
 
    The  shares of the  Fund do not  have cumulative voting  rights, which means
that the holders of more than 50% of  the shares voting for the election of  the
directors  can elect 100% of the directors if  they choose to do so, and in such
event, the holders of the remaining shares voting for the election of  directors
will not be able to elect any person or persons to the Board of Directors.
 
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  Company, 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  Company is  an affiliate  of Dean  Witter InterCapital  Inc.,  the
Fund's  Investment Manager,  and of  Dean Witter  Distributors Inc.,  the Fund's
Distributor. As Transfer Agent and Dividend Disbursing Agent, Dean Witter  Trust
Company's  responsibilities include maintaining shareholder accounts, disbursing
cash dividends and
    
 
                                       37
<PAGE>
   
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
Company receives a per shareholder account fee from the Fund.
    
 
INDEPENDENT ACCOUNTANTS
- --------------------------------------------------------------------------------
 
    Price  Waterhouse LLP, 1177 Avenue of the Americas, New York, New York 10036
serves as the independent accountants  of the Fund. The independent  accountants
are responsible for auditing the annual financial statements of the Fund.
 
REPORTS TO SHAREHOLDERS
- --------------------------------------------------------------------------------
 
    The  Fund will send to shareholders, at least semi-annually, reports showing
the Fund's  portfolio  and  other  information.  An  annual  report,  containing
financial  statements  audited  by  independent  accountants,  will  be  sent to
shareholders each year.
 
    The Fund's  fiscal year  ends on  the last  day of  February. 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 Directors.
 
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 February 28,
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.
    
 
                                       38
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND BOARD OF DIRECTORS
OF DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
 
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  Natural  Resource
Development  Securities Inc. (the  "Fund") at February 28,  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 ten years in the period then ended, 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  February 28,  1997  by correspondence  with the
custodian and brokers  and the  application of  alternative auditing  procedures
where  confirmations from brokers were not  received, provide a reasonable basis
for the opinion expressed above.
 
PRICE WATERHOUSE LLP
1177 AVENUE OF THE AMERICAS
NEW YORK, NEW YORK 10036
APRIL 11, 1997
 
                      1997 FEDERAL TAX NOTICE (UNAUDITED)
 
       During the year  ended February  28, 1997,  the Fund  paid to  its
       shareholders  $1.50 per  share from  long-term capital  gains. For
       such period, 21.03% of the income paid qualified for the dividends
       received deduction available to corporations.
 
                                       39
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997
<TABLE>
<CAPTION>
 NUMBER OF
  SHARES                                                VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
             COMMON STOCKS (91.5%)
             BASIC ENERGY (39.1%)
             NATURAL GAS (8.8%)
    30,000   Anardarko Petroleum Corp............  $     1,687,500
    35,000   Cabot Oil & Gas Corp................          555,625
    75,000   Chesapeake Energy Corp..............        1,556,250
    50,000   Devon Energy Corp...................        1,562,500
    55,000   El Paso Natural Gas Co..............        2,949,375
   120,000   Elan Energy, Inc. (Canada)*.........          964,771
    30,000   FX Energy, Inc.*....................          307,500
   175,000   Gulf Canada Resources, Ltd.
               (Canada)*.........................        1,225,000
   125,000   Numac Energy Inc. (Canada)*.........          571,006
    65,000   Petro-Canada (Canada)...............          940,652
    60,000   Questar Corp........................        2,175,000
    83,800   Rigel Energy Corp. (Canada)*........          796,229
    55,000   Sonat, Inc..........................        2,530,000
    40,000   Suncor, Inc. (Canada)...............        1,780,442
    50,000   Williams Companies, Inc.............        2,187,500
                                                   ---------------
                                                        21,789,350
                                                   ---------------
             NATURAL GAS - EXPLORATION & PRODUCTION (6.9%)
   175,000   Archer Resources Ltd. (Canada)*.....          722,665
    50,000   Barrett Resources Corp.*............        1,643,750
    35,000   Belden & Blake Corp.*...............          787,500
    65,000   Burlington Resources, Inc...........        2,851,875
    65,000   Chieftain International, Inc.*......        1,300,000
    40,000   Clayton Williams Energy, Inc.*......          510,000
   100,000   Comstock Resources, Inc.*...........          900,000
    21,200   Edge Petroleum Co.*.................          368,350
   110,000   Enserch Exploration, Inc.*..........        1,058,750
    40,000   Flores & Rucks, Inc.*...............        1,800,000
    40,000   KN Energy, Inc......................        1,580,000
   100,000   Ranger Oil Ltd. (Canada)............          900,000
    50,000   St. Mary Land & Exploration Co......        1,218,750
    70,000   Swift Energy Co.*...................        1,505,000
                                                   ---------------
                                                        17,146,640
                                                   ---------------
             OIL INTEGRATED - DOMESTIC (7.9%)
    35,000   Amerada Hess Corp...................        1,868,125
    32,000   Atlantic Richfield Co...............        4,000,000
    12,900   Louisiana Land & Exploration Co.....          615,975
    90,000   Occidental Petroleum Corp...........        2,295,000
    75,000   Oryx Energy Co.*....................        1,500,000
    50,000   Phillips Petroleum Co...............        2,068,750
    60,000   Unocal Corp.........................        2,317,500
   100,000   USX-Marathon Group..................        2,662,500
    40,000   Vintage Petroleum, Inc..............        1,205,000
    60,000   Wiser Oil Co........................        1,125,000
                                                   ---------------
                                                        19,657,850
                                                   ---------------
 
<CAPTION>
 NUMBER OF
  SHARES                                                VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
             OIL INTEGRATED - INTERNATIONAL (13.3%)
    30,000   British Petroleum Co. PLC (ADR)
               (United Kingdom)..................  $     3,971,250
    85,000   Ente Nazionale Idrocarburi SpA (ADR)
               (Italy)...........................        4,228,750
    70,000   Exxon Corp..........................        6,991,250
    38,000   Mobil Corp..........................        4,664,500
    30,000   Royal Dutch Petroleum Co. (ADR)
               (Netherlands).....................        5,190,000
    40,000   Texaco, Inc.........................        3,955,000
   100,000   Total S.A. (ADR) (France)...........        3,962,500
                                                   ---------------
                                                        32,963,250
                                                   ---------------
             OIL REFINERIES (2.2%)
    50,000   Ashland, Inc........................        2,093,750
    99,000   Tosco Corp..........................        2,759,625
    20,000   Ultramar Diamond Shamrock Corp......          610,000
                                                   ---------------
                                                         5,463,375
                                                   ---------------
 
             TOTAL BASIC ENERGY..................       97,020,465
                                                   ---------------
 
             ENERGY DEVELOPMENT & TECHNOLOGY (16.4%)
             OIL DRILLING (5.3%)
    20,000   Diamond Offshore Drilling, Inc.*....        1,180,000
    30,000   ENSCO International, Inc.*..........        1,301,250
    50,000   Falcon Drilling Company, Inc.*......        1,693,750
    50,000   Helmerich & Payne, Inc..............        2,112,500
    90,000   Marine Drilling Company, Inc.*......        1,338,750
    40,000   Noble Drilling Corp.*...............          710,000
    55,000   Patterson Energy, Inc.*.............        1,223,750
    50,000   Reading & Bates Corp.*..............        1,212,500
    50,000   Rowan Companies, Inc.*..............          993,750
    25,000   Transocean Offshore, Inc............        1,396,875
                                                   ---------------
                                                        13,163,125
                                                   ---------------
             OIL EQUIPMENT & SERVICES (10.6%)
    55,000   American Oilfield Divers, Inc.*.....          632,500
    35,000   Baker Hughes, Inc...................        1,242,500
    20,000   BJ Services Co.*....................          795,000
    50,000   Camco International, Inc............        1,931,250
    45,000   Cooper Cameron Corp.*...............        2,947,500
   125,000   Dawson Production Services, Inc.*...        1,437,500
    60,000   Dresser Industries, Inc.............        1,822,500
   120,000   Global Industries Ltd.*.............        2,160,000
    35,000   Halliburton Co......................        2,261,875
    75,000   Nabors Industries, Inc.*............        1,153,125
    20,000   Schlumberger, Ltd...................        2,012,500
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       40
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997, CONTINUED
<TABLE>
<CAPTION>
 NUMBER OF
  SHARES                                                VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
    45,000   SEACOR Holdings, Inc.*..............  $     2,086,875
    40,500   Seitel Inc..........................        1,377,000
   150,000   Veritas DGC Inc.*...................        2,493,750
    60,000   Weatherford Enterra, Inc.*..........        1,800,000
                                                   ---------------
                                                        26,153,875
                                                   ---------------
             TRANSPORTATION (0.5%)
    44,000   Teekay Shipping Corp................        1,210,000
                                                   ---------------
             TOTAL ENERGY DEVELOPMENT &
             TECHNOLOGY..........................       40,527,000
                                                   ---------------
             METALS & BASIC MATERIALS (36.0%)
             ALUMINUM (2.0%)
    55,000   Alumax Inc.*........................        2,151,875
    40,000   Aluminum Co. of America.............        2,850,000
                                                   ---------------
                                                         5,001,875
                                                   ---------------
             BUILDING MATERIALS (1.2%)
    60,000   Caraustar Industries, Inc...........        1,770,000
    65,000   Shaw Group, Inc.*...................        1,300,000
                                                   ---------------
                                                         3,070,000
                                                   ---------------
             CHEMICALS (10.4%)
    50,000   Du Pont (E.I.) de Nemours & Co.,
               Inc...............................        5,362,500
    60,000   Eastman Chemical Co.................        3,307,500
    90,000   Georgia Gulf Corp...................        2,430,000
    50,000   Hercules, Inc.......................        2,325,000
    40,000   Imperial Chemical Industries PLC
               (ADR) (United Kingdom)............        1,995,000
   140,000   Monsanto Co.........................        5,092,500
    85,000   Olin Corp...........................        3,400,000
    20,000   Rohm & Haas Co......................        1,840,000
                                                   ---------------
                                                        25,752,500
                                                   ---------------
             CHEMICALS - DIVERSIFIED (0.5%)
    60,000   Engelhard Corp......................        1,327,500
                                                   ---------------
             CHEMICALS - SPECIALTY (4.5%)
   100,000   Asia Pacific Resources Ltd.
               (Canada)*.........................          606,636
    60,000   Cabot Corp..........................        1,410,000
    75,000   Cytec Industries, Inc.*.............        2,971,875
    70,000   IMC Global, Inc.....................        2,441,250
    60,000   Morton International, Inc...........        2,475,000
    75,000   Polymer Group, Inc.*................        1,134,375
                                                   ---------------
                                                        11,039,136
                                                   ---------------
             GOLD (4.6%)
    80,000   Agnico-Eagle Mines Ltd. (Canada)....        1,140,000
    85,000   Barrick Gold Corp. (Canada).........        2,401,250
 
<CAPTION>
 NUMBER OF
  SHARES                                                VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
   200,000   Dayton Mining Corp. (Canada)*.......  $     1,062,500
    50,000   Getchell Gold Corp.*................        2,575,000
    50,000   Golden Star Resources Ltd.*.........          718,750
    35,954   Newmont Mining Corp.................        1,707,815
   200,000   Triton Mining Corp. (Canada)*.......          584,710
   125,000   TVX Gold, Inc. (Canada)*............        1,109,375
                                                   ---------------
                                                        11,299,400
                                                   ---------------
             MACHINERY - DIVERSIFIED (1.6%)
    55,000   Deere & Co..........................        2,344,375
    85,000   Global Industrial Technologies,
               Inc.*.............................        1,508,750
                                                   ---------------
                                                         3,853,125
                                                   ---------------
             METALS - MISCELLANEOUS (2.5%)
    50,687   Freeport-McMoran Copper & Gold, Inc.
               (Series A)........................        1,653,663
   700,000   M.I.M. Holdings Ltd. (Australia)....          974,207
    30,000   RTZ Corp. PLC (ADR) (United
               Kingdom)..........................        1,848,750
    75,000   Stillwater Mining Co.*..............        1,715,625
                                                   ---------------
                                                         6,192,245
                                                   ---------------
             PAPER & FOREST PRODUCTS (6.1%)
    65,000   Buckeye Cellulose Corp..............        1,958,125
    45,000   Champion International Corp.........        1,985,625
    50,000   Fort Howard Corp.*..................        1,487,500
    85,000   Louisiana-Pacific Corp..............        1,806,250
    30,000   Mead Corp...........................        1,747,500
    45,000   Temple-Inland, Inc..................        2,480,625
    50,000   Union Camp Corp.....................        2,412,500
    20,000   Willamette Industries, Inc..........        1,280,000
                                                   ---------------
                                                        15,158,125
                                                   ---------------
             POLLUTION CONTROL (0.7%)
    50,000   U.S.A. Waste Services, Inc.*........        1,800,000
                                                   ---------------
             STEEL (1.9%)
   225,000   Algoma Steel, Inc. (Canada)*........        1,175,815
    50,000   Nucor Corp..........................        2,406,250
    60,000   Steel Dynamics, Inc.*...............        1,200,000
                                                   ---------------
                                                         4,782,065
                                                   ---------------
 
             TOTAL METALS & BASIC MATERIALS......       89,275,971
                                                   ---------------
 
             TOTAL COMMON STOCKS
             (IDENTIFIED COST $216,151,523)......      226,823,436
                                                   ---------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       41
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997, CONTINUED
 
<TABLE>
<CAPTION>
 PRINCIPAL
 AMOUNT IN
 THOUSANDS                                              VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
             SHORT-TERM INVESTMENTS (6.9%)
             U.S. GOVERNMENT AGENCIES (a) (4.0%)
  $  5,000   Federal Home Loan Banks 5.17% due
               03/06/97..........................  $     4,996,410
     5,000   Federal Home Loan Mortgage Corp.
               5.21% due 03/04/97................        4,997,829
                                                   ---------------
 
             TOTAL U.S. GOVERNMENT AGENCIES
             (AMORTIZED COST $9,994,239).........        9,994,239
                                                   ---------------
             REPURCHASE AGREEMENT (2.9%)
     7,312   The Bank of New York 5.25% due
               03/03/97 (dated 02/28/97; proceeds
               $7,315,538; collateralized by
               $863,272 U.S. Treasury Note 7.50%
               due 11/15/01 valued at $919,955
               and $6,417,958 U.S. Treasury Note
               5.625% due 10/31/97 valued at
               $6,538,631) (Identified Cost
               $7,312,339).......................        7,312,339
                                                   ---------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                        VALUE
- ------------------------------------------------------------------
<C>          <S>                                   <C>
 
             TOTAL SHORT-TERM INVESTMENTS
             (IDENTIFIED COST $17,306,578).......  $    17,306,578
                                                   ---------------
 
TOTAL INVESTMENTS
(IDENTIFIED COST $233,458,101)
(B)...........................       98.4%   244,130,014
 
OTHER ASSETS IN EXCESS OF
LIABILITIES...................        1.6      3,858,669
                                    -----   ------------
 
NET ASSETS....................      100.0%  $247,988,683
                                    -----   ------------
                                    -----   ------------
 
<FN>
- ---------------------
ADR  American Depository Receipt.
 *   Non-income producing security.
(a)  Securities were purchased on a discount basis. The interest rates shown
     have been adjusted to reflect a money market equivalent yield.
(b)  The aggregate cost for federal income tax purposes approximates identified
     cost.
     The  aggregate  gross  unrealized  appreciation  is  $19,213,468  and  the
     aggregate gross unrealized depreciation is $8,541,555, resulting in a  net
     unrealized appreciation of $10,671,913.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       42
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
FEBRUARY 28, 1997
 
<TABLE>
<S>                                                           <C>
ASSETS:
Investments in securities, at value
  (identified cost $233,458,101)............................  $244,130,014
Receivable for:
    Investments sold........................................    16,067,395
    Capital stock sold......................................       631,369
    Dividends...............................................       486,658
    Foreign withholding taxes reclaimed.....................        29,242
Prepaid expenses and other assets...........................        32,621
                                                              ------------
 
     TOTAL ASSETS...........................................   261,377,299
                                                              ------------
 
LIABILITIES:
Payable for:
    Investments purchased...................................    12,524,343
    Capital stock repurchased...............................       416,740
    Plan of distribution fee................................       191,427
    Investment management fee...............................       121,339
Accrued expenses............................................       134,767
                                                              ------------
 
     TOTAL LIABILITIES......................................    13,388,616
                                                              ------------
 
NET ASSETS:
Paid-in-capital.............................................   215,489,116
Net unrealized appreciation.................................    10,673,012
Accumulated undistributed net investment income.............        50,909
Accumulated undistributed net realized gain.................    21,775,646
                                                              ------------
 
     NET ASSETS.............................................  $247,988,683
                                                              ------------
                                                              ------------
 
NET ASSET VALUE PER SHARE,
  18,589,547 SHARES OUTSTANDING (500,000,000 SHARES
  AUTHORIZED OF $.01 PAR VALUE).............................
                                                                    $13.34
                                                              ------------
                                                              ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       43
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED FEBRUARY 28, 1997
 
<TABLE>
<S>                                                           <C>
NET INVESTMENT INCOME:
 
INCOME
Dividends (net of $66,360 foreign withholding tax)..........  $  2,993,820
Interest....................................................       702,288
                                                              ------------
 
     TOTAL INCOME...........................................     3,696,108
                                                              ------------
 
EXPENSES
Plan of distribution fee....................................     1,910,070
Investment management fee...................................     1,221,826
Transfer agent fees and expenses............................       222,190
Registration fees...........................................        74,599
Shareholder reports and notices.............................        55,672
Professional fees...........................................        55,473
Custodian fees..............................................        34,268
Directors' fees and expenses................................        16,999
Other.......................................................         2,099
                                                              ------------
 
     TOTAL EXPENSES.........................................     3,593,196
                                                              ------------
 
     NET INVESTMENT INCOME..................................       102,912
                                                              ------------
 
NET REALIZED AND UNREALIZED GAIN (LOSS):
Net realized gain...........................................    49,178,705
Net change in unrealized appreciation.......................   (15,813,380)
                                                              ------------
 
     NET GAIN...............................................    33,365,325
                                                              ------------
 
NET INCREASE................................................  $ 33,468,237
                                                              ------------
                                                              ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       44
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                                                FOR THE YEAR        FOR THE YEAR
                                                                    ENDED               ENDED
                                                              FEBRUARY 28, 1997   FEBRUARY 29, 1996
- ---------------------------------------------------------------------------------------------------
<S>                                                           <C>                 <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment income.......................................    $    102,912        $    743,674
Net realized gain...........................................      49,178,705           9,657,602
Net change in unrealized appreciation.......................     (15,813,380)         20,867,725
                                                              -----------------   -----------------
 
     NET INCREASE...........................................      33,468,237          31,269,001
                                                              -----------------   -----------------
 
DIVIDENDS AND DISTRIBUTIONS FROM:
Net investment income.......................................        (287,205)           (476,340)
Net realized gain...........................................     (30,377,434)         (7,165,637)
                                                              -----------------   -----------------
 
     TOTAL..................................................     (30,664,639)         (7,641,977)
                                                              -----------------   -----------------
 
Net increase (decrease) from capital stock transactions.....      92,523,643          (3,777,196)
                                                              -----------------   -----------------
 
     NET INCREASE...........................................      95,327,241          19,849,828
 
NET ASSETS:
Beginning of period.........................................     152,661,442         132,811,614
                                                              -----------------   -----------------
 
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF
    $50,909 AND $235,202, RESPECTIVELY).....................    $247,988,683        $152,661,442
                                                              -----------------   -----------------
                                                              -----------------   -----------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       45
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Dean Witter Natural Resource Development Securities Inc. (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 capital growth. The Fund invests primarily in common stock of
companies in the natural resources and related areas. The Fund was incorporated
in Maryland on December 22, 1980 and commenced operations on March 30, 1981.
 
The preparation of financial statements in accordance with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts and disclosures. Actual results could differ from
those estimates.
 
The following is a summary of significant accounting policies:
 
A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the
New York, American or other domestic or foreign stock exchange is valued at its
latest sale price on that exchange prior to the time when assets are valued; if
there were no sales that day, the security is valued at the latest bid price (in
cases where 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 Directors); (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
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 Directors
(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.
Discounts are accreted over the life of the respective securities. Interest
income is accrued daily.
 
                                       46
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
C. 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.
 
D. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions to its shareholders on the ex-dividend date. The amount of
dividends and distributions from net investment income and net realized capital
gains are determined in accordance with federal income tax regulations which may
differ from generally accepted accounting principles. These "book/tax"
differences are either considered temporary or permanent in nature. To the
extent these differences are permanent in nature, such amounts are reclassified
within the capital accounts based on their federal tax-basis treatment;
temporary differences do not require reclassification. Dividends and
distributions which exceed net investment income and net realized capital gains
for financial reporting purposes but not for tax purposes are reported as
dividends in excess of net investment income or distributions in excess of net
realized capital gains. To the extent they exceed net investment income and net
realized capital gains for tax purposes, they are reported as distributions of
paid-in-capital.
 
2. INVESTMENT MANAGEMENT AGREEMENT
 
Pursuant to an Investment Management Agreement with the Investment Manager, the
Fund pays a management fee, accrued daily and payable monthly, by applying the
following annual rates to the net assets of the Fund determined at the close of
each business day: 0.625% to the portion of daily net assets not exceeding $250
million and 0.50% to the portion of daily net assets exceeding $250 million.
 
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 Rule 12b-1 under the Act pursuant
to which the Fund pays the Distributor compensation, accrued
 
                                       47
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
daily and payable monthly, at an annual rate of 1.0% of the lesser of: (a) the
average daily aggregate gross sales of the Fund's shares since the
implementation of the Plan on July 2, 1984 (not including reinvestment of
dividend or capital gain distributions) less the average daily aggregate net
asset value of the Fund's shares redeemed since the Fund's implementation of the
Plan upon which a contingent deferred sales charge has been imposed or upon
which such charge has been waived; or (b) the Fund's average daily net assets
attributable to shares issued, net of related shares redeemed, since
implementation of the Plan. Amounts paid under the Plan are paid to the
Distributor to compensate it for the services provided and the expenses borne by
it and others in the distribution of the Fund's shares, including the payment of
commissions for sales of the Fund's shares and incentive compensation to, and
expenses of, the account executives of Dean Witter Reynolds Inc. ("DWR"), an
affiliate of the Investment Manager and Distributor, and other employees or
selected broker-dealers who engage in or support distribution of the Fund's
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 be compensated under the
Plan for its opportunity costs in advancing such amounts, which compensation
would be in the form of a carrying charge on any unreimbursed expenses incurred
by the Distributor.
 
Provided that the Plan continues in effect, any cumulative expenses incurred but
not yet recovered, may be recovered through future distribution fees from the
Fund and contingent deferred sales charges from the Fund's shareholders.
 
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 the investors upon redemption of
shares, if for any reason the Plan is terminated, the Directors 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
$6,803,658 at February 28, 1997.
 
The Distributor has informed the Fund that for the year ended February 28, 1997,
it received approximately $151,000 in contingent deferred sales charges from
certain redemptions of the Fund's shares.
 
                                       48
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
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 February 28, 1997 aggregated
$336,164,177 and $284,502,518, respectively.
 
For the year ended February 28, 1997, the Fund incurred brokerage commissions of
$263,065 with DWR for portfolio transactions executed on behalf of the Fund. At
February 28, 1997, the Fund's receivable for investments sold included unsettled
trades with DWR of $2,697,660.
 
Dean Witter Trust Company, an affiliate of the Investment Manager and
Distributor, is the Fund's transfer agent. At February 28, 1997, the Fund had
transfer agent fees and expenses payable of approximately $4,800.
 
The Fund has an unfunded noncontributory defined benefit pension plan covering
all independent Directors of the Fund who will have served as independent
Directors for at least five years at the time of retirement. Benefits under this
plan are based on years of service and compensation during the last five years
of service. At February 28, 1997, the Fund had an accrued pension liability of
$48,913 which is included in accrued expenses in the Statement of Assets and
Liabilities.
 
5. CAPITAL STOCK
 
Transactions in capital stock were as follows:
 
<TABLE>
<CAPTION>
                                                                           FOR THE YEAR                  FOR THE YEAR
                                                                              ENDED                         ENDED
                                                                        FEBRUARY 28, 1997             FEBRUARY 29, 1996
                                                                   ----------------------------   --------------------------
                                                                     SHARES          AMOUNT         SHARES         AMOUNT
                                                                   -----------   --------------   -----------   ------------
<S>                                                                <C>           <C>              <C>           <C>
Sold.............................................................   24,642,984   $  344,947,391    17,740,630   $213,549,836
Reinvestment of dividends and distributions......................    2,080,543       28,455,203       587,535      7,130,881
                                                                   -----------   --------------   -----------   ------------
                                                                    26,723,527      373,402,594    18,328,165    220,680,717
Repurchased......................................................  (20,151,281)    (280,878,951)  (18,637,754)  (224,457,913)
                                                                   -----------   --------------   -----------   ------------
Net increase (decrease)..........................................    6,572,246   $   92,523,643      (309,589)  $ (3,777,196)
                                                                   -----------   --------------   -----------   ------------
                                                                   -----------   --------------   -----------   ------------
</TABLE>
 
6. FEDERAL INCOME TAX STATUS
 
As of February 28, 1997, the Fund had temporary book/tax differences
attributable to capital loss deferrals on wash sales.
 
                                       49
<PAGE>
DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.
FINANCIAL HIGHLIGHTS
 
Selected  ratios and  per share  data for a  share of  capital stock outstanding
throughout each period:
 
<TABLE>
<CAPTION>
                                               FOR THE YEAR ENDED FEBRUARY 28
                  ----------------------------------------------------------------------------------------
                   1997     1996*    1995     1994     1993     1992*    1991     1990     1989     1988*
- ----------------------------------------------------------------------------------------------------------
 
<S>               <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
PER SHARE OPERATING
PERFORMANCE:
 
Net asset value,
 beginning of
 period.......... $ 12.70  $ 10.77  $ 11.82  $ 11.36  $ 10.20  $ 11.03  $ 11.33  $  9.93  $  9.46  $  9.10
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
Net investment
 income..........   --        0.06     0.09     0.09     0.16     0.20     0.25     0.30     0.23     0.20
Net realized and
 unrealized gain
 (loss)..........    2.66     2.53    (0.24)    1.25     1.18    (0.44)    0.02     1.80     0.72     0.44
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
Total from
 investment
 operations......    2.66     2.59    (0.15)    1.34     1.34    (0.24)    0.27     2.10     0.95     0.64
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
Less dividends
 and
 distributions
 from:
   Net investment
   income........   (0.02)   (0.04)   (0.12)   (0.09)   (0.18)   (0.20)   (0.28)   (0.32)   (0.21)   (0.28)
   Net realized
   gain..........   (2.00)   (0.62)   (0.78)   (0.79)   --       (0.39)   (0.29)   (0.38)   (0.27)   --
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
Total dividends
 and
 distributions...   (2.02)   (0.66)   (0.90)   (0.88)   (0.18)   (0.59)   (0.57)   (0.70)   (0.48)   (0.28)
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
Net asset value,
 end of period... $ 13.34  $ 12.70  $ 10.77  $ 11.82  $ 11.36  $ 10.20  $ 11.03  $ 11.33  $  9.93  $  9.46
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
                  -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
TOTAL INVESTMENT
RETURN+..........   20.88%   24.32%   (1.26)%   12.16%   13.31%   (1.91)%    2.87%   21.11%   10.29%    7.32%
 
RATIOS TO AVERAGE
NET ASSETS:
Expenses.........    1.84%    1.90%    1.90%    1.91%    1.96%    1.93%    1.80%    1.81%    1.92%    1.81%
 
Net investment
 income..........    0.05%    0.52%    0.77%    0.73%    1.46%    1.67%    2.28%    2.57%    2.09%    2.14%
 
SUPPLEMENTAL DATA:
Net assets, end
 of period, in
 thousands....... $247,989 $152,661 $132,812 $139,459 $118,496 $113,145 $150,636 $154,741 $136,911 $171,725
 
Portfolio
 turnover rate...     156%      49%      59%      69%      52%      31%      29%      22%       7%      26%
 
Average
 commission rate
 paid............ $0.0534    --       --       --       --       --       --       --       --       --
<FN>
 
- ---------------------
 *   Year ended February 29.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
 
                                       50
<PAGE>

               DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.

                              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 fiscal years ended the          ----------
      last day of February 1988, 1989, 1990,1991, 1992, 1993,
      1994, 1995, 1996 and 1997...............................            4    

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

      Portfolio of Investments at February 28, 1997 ..........           39
          
      Statement of assets and liabilities at February 28,
      1997....................................................           42
         
      Statement of operations for the year ended February 28,
      1997....................................................           43
          
      Statement of changes in net assets for the years ended
      February 29, 1996 and February 28, 1997...........                 44

      Notes to Financial Statements ..........................           45 
        
      Financial highlights for the fiscal years ended
      the last day of February 1988, 1989, 1990, 1991, 1992,
      1993, 1994, 1995, 1996 and 1997.........................           50 
                 
      (3)   Financial statements included in Part C:

            None

   (b) EXHIBITS:


    2.  --  By-Laws of the Registrant, Amended and Restated
            as of October 25, 1996  

   11. --   Consent of Independent Accountants


                                          1


<PAGE>

   16. --   Schedule for Computation of Performance Quotations  
         
   27.  --   Financial Data Schedule

- ------------------------------
All other exhibits previously filed and 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 March 31, 1997    
    --------------                  ------------------------
 Shares of Common Stock                       24,499            
  
Item 27. INDEMNIFICATION

       Reference is made to Section 3.15 of the Registrant's By-Laws and Section
2-418 of the Maryland General Corporation Law. 
     
    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


                                          2


<PAGE>

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 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
 (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.
    

                                          3


<PAGE>

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

                                          4


<PAGE>

    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 Small Cap Growth Fund
     (6) TCW/DW Balanced Fund 
     (7) TCW/DW Total Return Trust
     (8) TCW/DW Mid-Cap Equity Trust
     (9) TCW/DW 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
    
NAME AND POSITION        OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION WITH
DEAN WITTER              OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
INTERCAPITAL INC.        AND NATURE OF CONNECTION                        
- -----------------        -----------------------------------------------------

Charles A. Fiumefreddo   Executive Vice President and Director of Dean 
Chairman, Chief          Witter Reynolds Inc. ("DWR"); Chairman, Chief
Executive Officer and    Executive Officer and Director of Dean Witter
Director                 Distributors Inc. ("Distributors") and Dean
                         Witter Services Company Inc. ("DWSC"); Chairman and
                         Director of Dean Witter Trust Company ("DWTC");
                         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; Formerly Executive Vice President and
                         Director of Dean Witter, Discover & Co. ("DWDC");
                         Director and/or officer of various DWDC subsidiaries.

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

Richard M. DeMartini     Executive Vice President of DWDC; President and 
Director                 Chief Operating Officer of Dean Witter Capital,
                         a division of DWR; Member of the DWDC Management
                         Committee; Director of DWR, DWSC, Distributors
                         and DWTC; Trustee of the TCW/DW Funds.

James F. Higgins         Executive Vice President of DWDC; President and
Director                 Chief Operating Officer of Dean Witter Financial;
                         Director of DWR, DWSC, Distributors and DWTC.


                                          5


<PAGE>

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

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

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

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

John Van Heuvelen        President, Chief Operating Officer and Director
Executive Vice           of DWTC.
President

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

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

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

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

Richard Felegy
Senior Vice President                                               

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


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


                                          6


<PAGE>

Name and Position        Other Substantial Business, Profession, Vocation with
Dean Witter              or Employment, including Name, Principal Address
InterCapital Inc.        and Nature of Connection                        
- -----------------        -----------------------------------------------------

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

Kenton J. Hinchcliffe   
Senior Vice President    Vice President of various Dean Witter Funds.

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

Jenny B. Jones
Senior Vice President    Vice President of Dean Witter Special Value Fund.

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

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

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

Guy G. Rutherfurd, Jr.
Senior Vice President    Vice President of Dean Witter Market Leader Trust

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

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

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

Elizabeth A. Vetell     
Senior Vice President

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

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

Thomas F. Caloia         First Vice President and Assistant Treasurer of
First Vice President     DWSC, Assistant Treasurer of Distributors;
and Assistant            Treasurer and Chief Financial Officer of the
Treasurer                Dean Witter Funds and the TCW/DW Funds.

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


                                          7


<PAGE>

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

Michael Interrante       First Vice President and Controller of DWSC; 
First Vice President     Assistant Treasurer of Distributors;First Vice
and Controller           President and Treasurer of DWTC. 

Robert Zimmerman
First Vice President

Joan Allman
Vice President

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

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

Douglas Brown
Vice President

Philip Casparius
Vice President

Thomas Chronert
Vice President

Rosalie Clough
Vice President

Patricia A. Cuddy
Vice President           Vice President of various Dean Witter Funds.

B. Catherine Connelly
Vice President

Salvatore DeSteno
Vice President           Vice President of DWSC.

Frank J. DeVito    
Vice President           Vice President of DWSC.

Bruce Dunn
Vice President

Jeffrey D. Geffen
Vice President

Deborah Genovese
Vice President


                                          8


<PAGE>

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

Peter W. Gurman
Vice President

John Hechtlinger
Vice President

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

Elizabeth Hinchman
Vice President

David Hoffman
Vice President

David Johnson
Vice President

Christopher Jones
Vice President

James Kastberg
Vice President

Stanley Kapica
Vice President

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

Konrad J. Krill
Vice President           Vice President of various Dean Witter Funds.

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

Thomas Lawlor
Vice President

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

LouAnne D. McInnis       Vice President and Assistant Secretary of DWSC;
Vice President and       Assistant Secretary of the Dean Witter Funds and
Assistant Secretary      the TCW/DW Funds.


                                          9


<PAGE>

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

Sharon K. Milligan 
Vice President

Julie Morrone 
Vice President

David Myers   
Vice President

James Nash
Vice President

Richard Norris
Vice President

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

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

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

Carl F. Sadler
Vice President

Rafael Scolari
Vice President           Vice President of Prime Income Trust.

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

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

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

Vinh Q. Tran
Vice President           Vice President of various Dean Witter Funds.

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

Katherine C. Wickham
Vice President


                                          10


<PAGE>

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
(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)            Prime Income Trust
(29)            Dean Witter European Growth Fund Inc.
(30)            Dean Witter Developing Growth Securities Trust
(31)            Dean Witter Precious Metals and Minerals Trust
(32)            Dean Witter Pacific Growth Fund Inc.
(33)            Dean Witter Multi-State Municipal Series Trust
(34)            Dean Witter Federal Securities Trust
(35)            Dean Witter Short-Term U.S. Treasury Trust
(36)            Dean Witter Diversified Income Trust
(37)            Dean Witter Health Sciences Trust
(38)            Dean Witter Global Dividend Growth Securities
(39)            Dean Witter American Value Fund
(40)            Dean Witter U.S. Government Money Market Trust
(41)            Dean Witter Global Short-Term Income Fund Inc.
(42)            Dean Witter Premier Income Trust       
(43)            Dean Witter Value-Added Market Series
(44)            Dean Witter Global Utilities Fund
(45)            Dean Witter High Income Securities
(46)            Dean Witter National Municipal Trust    
(47)            Dean Witter International SmallCap Fund


                                          11


<PAGE>

(48)            Dean Witter Balanced Growth Fund
(49)            Dean Witter Balanced Income Fund
(50)            Dean Witter Hawaii Municipal Trust
(51)            Dean Witter Variable Investment Series   
(52)            Dean Witter Capital Appreciation Fund
(53)            Dean Witter Intermediate Term U.S. Treasury Trust
(54)            Dean Witter Information Fund
(55)            Dean Witter Japan Fund
(56)            Dean Witter Income Builder Fund
(57)            Dean Witter Special Value Fund
(58)            Dean Witter Financial Services Trust
(59)            Dean Witter Market Leader Trust
 (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 Small Cap Growth Fund
 (6)            TCW/DW Balanced Fund
 (7)            TCW/DW Total Return Trust
 (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.

                              Positions and
                              Office with
    Name                      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.


                                          12


<PAGE>

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
stockholders, upon request and without charge.


                                          13


<PAGE>

                                      SIGNATURES
                                           
    Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this
Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 24th day of April, 1997.

                 DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.

                                       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. 19 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,
                                   Director and Chairman
By  /c/ Charles A. Fiumefreddo                                  04/24/97
    ----------------------------
        Charles A. Fiumefreddo

(2) Principal Financial Officer    Treasurer and Principal
                                   Accounting Officer
                   
By  /c/ Thomas F. Caloia                                        04/24/97
    ----------------------------
              Thomas F. Caloia

(3) Majority of the Directors  

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell

By  /c/ Barry Fink                                              04/24/97
    ----------------------------
         Barry Fink   
        Attorney-in-Fact

    Michael Bozic       Manuel H. Johnson      
    Edwin J. Garn       Michael E. Nugent      
    John R. Haire       John L. Schroeder      
    
By  /s/ David A. Butowsky                                       04/24/97
    ----------------------------
        David A. Butowsky     
        Attorney-in-Fact 



<PAGE>

               DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC.

                                    EXHIBIT INDEX



Exhibit No.                  Description
- -----------                  -----------

 2.  -        By-laws of the Registrant, Amended and Restated 
              as of October 25, 1996.
    
11.  -        Consent of Independent Accountants

16. -         Schedules for Computation of Performance Quotations

27.  -        Financial Data Schedule     
                     
                      

<PAGE>

                                   BY-LAWS 

                                      OF 

           DEAN WITTER NATURAL RESOURCE DEVELOPMENT SECURITIES INC. 
                 AMENDED AND RESTATED AS OF OCTOBER 25, 1996 

                                  ARTICLE I 
                                   OFFICES 

   SECTION 1.1. PRINCIPAL OFFICE. The principal office of the Corporation in 
the State of Maryland shall be in the City of Baltimore. 

   SECTION 1.2. OTHER OFFICES. In addition to its principal office in the 
State of Maryland, the Corporation may have an office or offices in the City 
of New York, State of New York, and at such other places as the Board of 
Directors may from time to time designate or the business of the Corporation 
may require. 

                                  ARTICLE II 
                            STOCKHOLDERS' MEETINGS 

   SECTION 2.1. PLACE OF MEETINGS. Meetings of stockholders shall be held at 
such place, within or without the State of Maryland, as may be designated 
from time to time by the Board of Directors. 

   SECTION 2.2. ANNUAL MEETINGS. An annual meeting of stockholders, when 
required, at which the stockholders shall elect a Board of Directors and 
transact such other business as may properly come before the meeting, shall 
be held in June of each year, the precise date in June to be fixed by the 
Board of Directors. Notwithstanding anything to the contrary contained 
herein, the Corporation shall not be required to hold an annual meeting in 
any year in which none of the following is required to be acted upon by 
stockholders under the Investment Company Act of 1940, as amended: 

     (1) election of directors; 

     (2) approval of an investment advisory or management agreement; 

     (3) ratification of the selection of independent accountants; and 

     (4) approval of a distribution plan or agreement; 

provided, however, that a special meeting of stockholders shall promptly be 
called when requested in writing by the recordholders of not less than 10% of 
the Corporation's shares. 

   SECTION 2.3. SPECIAL MEETINGS. Special meetings of stockholders of the 
Corporation shall be held whenever called by the Board of Directors or the 
President of the Corporation. Special meetings of stockholders shall also be 
called by the Secretary upon the written request of the holders of shares 
entitled to vote not less than twenty-five percent (25%) of all the votes 
entitled to be cast at such meeting. Such request shall state the purpose or 
purposes of such meeting and the matters proposed to be acted on thereat. The 
Secretary shall inform such stockholders of the reasonable estimated cost of 
preparing and mailing such notice of the meeting, and upon payment to the 
Corporation of such costs, the Secretary shall give notice stating the 
purpose or purposes of the meeting to all entitled to a vote at such meeting. 
No special 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 special meeting of stockholders held during the 
preceding twelve months. 

   SECTION 2.4. NOTICE OF MEETINGS. Written or printed notice of every 
stockholders' meeting stating the place, date and time, and in the case of a 
special meeting the purpose or purposes thereof, shall be 

                                        1
<PAGE>

given by the Secretary not less than ten (10) nor more than ninety (90) days 
before such meeting to each stockholder entitled to vote at such meeting, 
either by mail or by presenting it to him personally, or by leaving it at his 
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 stockholder at his address as it appears on the records of 
the Corporation. 

   SECTION 2.5. QUORUM AND ADJOURNMENT OF MEETINGS. Except as otherwise 
provided by law, by the Charter of the Corporation, or by these By-Laws, at 
all meetings of stockholders 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 stockholders 
present or represented by proxy and entitled to vote thereat shall have power 
to adjourn the meeting from time to time without notice other than 
announcement at the meeting, until a quorum shall be present. At any 
adjourned meeting at which a quorum shall be present, any business may be 
transacted if the meeting had been held as originally called. 

   SECTION 2.6. VOTING RIGHTS, PROXIES. At each meeting of the stockholders 
at which a quorum is present, each holder of stock entitled to vote thereat 
shall be entitled to one vote in person or by proxy, executed in writing by 
the stockholder or his duly authorized attorney-in-fact, for each share of 
stock of the Corporation entitled to vote so registered in his name on the 
books of the Corporation on the date fixed as the record date for the 
determination of stockholders 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 stockholders, 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. 

   SECTION 2.7. VOTE REQUIRED. Except as otherwise provided by law, by the 
Charter of the Corporation, or by these By-Laws, at each meeting of 
stockholders at which a quorum is present, all matters shall be decided by a 
majority of the votes cast by the stockholders present in person or 
represented by proxy and entitled to vote with respect to any such matter. 

   SECTION 2.8. ACTION BY STOCKHOLDERS 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 stockholders may be taken without a meeting if a 
consent in writing setting forth the action shall be signed by all the 
stockholders entitled to vote upon the action and such consent shall be filed 
with the records of the Corporation. 

   SECTION 2.9. PRESENCE AT MEETINGS. Presence at meetings of stockholders 
requires physical attendance by the stockholder or his or her proxy at the 
meeting site and does not encompass attendance by telephonic or other 
electronic means. 

                                 ARTICLE III 
                                  DIRECTORS 

   SECTION 3.1. NUMBER AND TERM. The Board of Directors shall consist of not 
less than three (3) and not more than fifteen (15) directors, the number of 
directors to be fixed from time to time within the above-specified limits by 
the affirmative vote of a majority of the whole Board of Directors. At the 
first annual meeting of stockholders and at each meeting thereafter called 
for the purpose of electing directors, the stockholders shall elect directors 
to hold office until their successors are elected and qualify. Directors need 
not be stockholders of the Corporation. 

   SECTION 3.2. POWERS. The business of the Corporation shall be managed by 
the Board of Directors which may exercise all powers of the Corporation and 
do all lawful acts and things which are not by law or by the Charter of the 
Corporation, or by these By-Laws, directed or required to be exercised or 
done exclusively by the stockholders. 

   SECTION 3.3. ORGANIZATIONAL MEETINGS. The first meeting of each newly 
elected Board of Directors for the purposes of organization and the election 
of officers and otherwise shall be held at such time and place as shall be 
specified in a notice given as hereinafter provided for special meetings of 
the Board of Directors, or as shall be specified in a written waiver signed 
by all directors. 

                                        2
<PAGE>

   SECTION 3.4. REGULAR MEETINGS. Regular meetings of the Board of Directors 
may be held at such time and place as shall be determined from time to time 
by the Board of Directors without further notice. 

   SECTION 3.5. SPECIAL MEETINGS. Special meetings of the Board of Directors 
may be called at any time by the President and shall be called by such 
President or the Secretary upon the written request of any two (2) directors. 

   SECTION 3.6. NOTICE OF SPECIAL MEETINGS. Written notice of special 
meetings of the Board of Directors, stating the place, date and time thereof, 
shall be given not less than two (2) days before such meeting to each 
director, 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 director at his address as it appears on the records 
of the Corporation. 

   SECTION 3.7. TELEPHONE MEETINGS. Any member or members of the Board of 
Directors or of any committee designated by the Board, may participate in a 
meeting of the Board, 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. This Section 3.7 shall not be applicable to meetings held for 
the purpose of voting in respect of approval of contracts or agreements 
whereby a person undertakes to serve or act as investment adviser of, or 
principal underwriter for, the Corporation. 

   SECTION 3.8. QUORUM, VOTING AND ADJOURNMENT OF MEETINGS. At all meetings 
of the Board of Directors, a majority of the whole Board 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 directors present shall 
be the act of the Board of Directors, unless the concurrence of a greater 
proportion is expressly required for such action by law, the Charter of the 
Corporation or these By-Laws. If at any meeting of the Board there be less 
than a quorum present, the directors 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 3.9. REMOVAL. Any one or more of the directors may be removed, 
either with or without cause, at any time, by the affirmative vote of the 
stockholders holding a majority of the outstanding shares entitled to vote 
for the election of directors. (For purposes of determining the circumstances 
and procedures under which such removal of directors may take place, the 
provisions of Section 16(c) of the Investment Company Act of 1940 shall be 
applicable to the same extent as if the Corporation were subject to the 
provisions of that Section.) The successor or successors of any director or 
directors so removed may be elected by the stockholders entitled to vote 
thereon at the same meeting to fill any resulting vacancies for the unexpired 
term of removed directors. Except as provided by law, pending such an 
election (or in the absence of such an election), the successor or successors 
of any director or directors so removed may be chosen by the Board of 
Directors. 

   SECTION 3.10. VACANCIES. Except as otherwise provided by law, any vacancy 
occurring in the Board of Directors and newly created directorships resulting 
from an increase in the authorized number of directors may be filled by the 
vote of a majority of the directors then in office or, if only one director 
shall then be in office, by such director. A director elected by the Board of 
Directors to fill a vacancy shall be elected to hold office until the next 
annual meeting of stockholders or until his successor is elected and 
qualifies. 

   SECTION 3.11. ACTION BY DIRECTORS 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 Board of Directors may be taken without a meeting if a 
consent in writing setting forth the action shall be signed by all of the 
directors entitled to vote upon the action and such written consent is filed 
with the minutes of proceedings of the Board of Directors. 

   SECTION 3.12. EXPENSES AND FEES. Each director may be allowed expenses, if 
any, for attendance at each regular or special meeting of the Board of 
Directors and each director who is not an officer or employee of the 
Corporation or of its investment manager or underwriter or of any corporate 
affiliate of 

                                        3
<PAGE>

any of said persons shall receive for services rendered as a director of the 
Corporation such compensation as may be fixed by the Board of Directors. 
Nothing herein contained shall be construed to preclude any director from 
serving the Corporation in any other capacity and receiving compensation 
therefor. 

   SECTION 3.13. 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 Corporation and all 
checks, notes, drafts and other obligations for the payment of money by the 
Corporation shall be signed, and all transfer of securities standing in the 
name of the Corporation shall be executed, by the President, any Vice 
President or the Treasurer or by any one or more officers or agents of the 
Corporation as shall be designated for that purpose by vote of the Board of 
Directors; notwithstanding the above, nothing in this Section 3.13 shall be 
deemed to preclude the electronic authorization, by designated persons, of 
the Corporation's Custodian to transfer assets of the Corporation. 

   SECTION 3.14. CONTRACTS. Except as otherwise provided by law or by the 
Charter of the Corporation, no contract or transaction between the 
Corporation and any partnership or corporation, and no act of the 
Corporation, shall in any way be affected or invalidated by the fact that any 
officer or director of the Corporation is pecuniarily or otherwise interested 
therein or is a member, officer or director of such interest shall be known 
to the Board of Directors of the Corporation. Specifically, but without 
limitation of the foregoing, the Corporation may enter into one or more 
contracts appointing Dean Witter InterCapital Inc. investment manager of the 
Corporation, and may otherwise do business with Dean Witter InterCapital 
Inc., notwithstanding the fact that one or more of the directors of the 
Corporation and some or all of its officers are, have been or may become 
directors, officers, members, employees, or stockholders of Dean Witter 
InterCapital Inc.; and in the absence of fraud, the Corporation and Dean 
Witter InterCapital Inc. may deal freely with each other, and neither such 
contract appointing Dean Witter InterCapital Inc. investment manager to the 
Corporation nor any other contract or transaction between the Corporation and 
Dean Witter InterCapital Inc. shall be invalidated or in any wise affected 
thereby, nor shall any director or officer of the Corporation by reason 
thereof be liable to the Corporation or to any stockholder or creditor of the 
Corporation or to any other person for any loss incurred under or by reason 
of any such contract or transaction. For purposes of this paragraph, any 
reference to "Dean Witter InterCapital Inc." shall be deemed to include said 
company and any parent, subsidiary or affiliate of said company and any 
successor (by merger, consolidation or otherwise) to said company or any such 
parent, subsidiary or affiliate. 

   SECTION 3.15. INDEMNIFICATION OF DIRECTORS, OFFICERS, EMPLOYEES AND 
AGENTS. (a) The Corporation 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 Corporation) by 
reason of the fact that he is or was a director, officer, employee or agent 
of the Corporation. 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 Corporation, and, with 
respect to any criminal action or proceeding, had no reasonable cause to 
believe his conduct was unlawful. Directors acting in their official capacity 
must act in good faith and in a manner reasonably believed to be in the best 
interest of the Corporation. 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 Corporation, 
and, with respect to any criminal action or proceeding, had reasonable cause 
to believe that his conduct was unlawful. A director may not be indemnified 
in respect of any proceeding charging improper personal benefit to the 
director, whether or not involving action in the director's official 
capacity, in which the director was adjudged to be liable on the basis that 
personal benefit was improperly received. 

   (b) The Corporation 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 Corporation to obtain a judgment or decree in 
its favor by reason of the fact that he is or was a director, officer, 
employee, 

                                        4
<PAGE>

or agent of the Corporation. The indemnification shall be against expenses, 
including attorney's 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 Corporation: 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 Corporation, 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 Corporation 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 
director or officer 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 director, officer, employee, or agent of the 
Corporation 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 
subsection (a) or (b) of this section may be made by the Corporation only as 
authorized in the specific case after a determination that indemnification of 
the director, officer, employee, or agent is proper in the circumstances 
because he has met the applicable standard of conduct set forth in subsection 
(a) or (b). 

      (2) The determination shall be made: 

        (i) By the Board of Directors, by a majority vote of a quorum which 
     consists of directors who were not parties to the action ("non-party 
     directors"), suit or proceeding; or if a quorum of non-party directors 
     is not obtainable by a majority vote of a committee of at least two 
     non-party directors; or 

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

      (iii) By the stockholders. 

      (3) Authorization of indemnification and determination as to 
reasonableness of expenses shall be made in the same manner as the 
determination that indemnification is permissible. However, if the 
determination that indemnification is permissible is made by independent 
legal counsel, authorization of indemnification and determination as to 
reasonableness of expenses shall be made by a committee of non-party 
directors or by the non-party quorum of the Board, or if neither exists, by 
the full Board. 

      (4) Notwithstanding the provisions of paragraphs (1) and (2) of this 
subsection (d), 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 Sections 17(h) and (i) of the Investment 
Company Act of 1940, as amended ("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 

      (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 directors who are neither "interested 
         persons" of the Corporation, as defined in Section 2(a)(19) of the 
         Investment Company Act of 1940, as amended, nor parties to the 
         action, suit or proceeding, or 

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

                                        5
<PAGE>

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

    (1) authorized in the specific case by the Board of Directors; and 

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

    (3) either 

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

         (ii) the Corporation 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 directors who are 
           neither "interested persons" of the Corporation, as defined in 
           Section 2(a)(19) of the Investment Company Act of 1940, as 
           amended, 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 stockholders or disinterested directors 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 director, officer, employee, or agent and inure to the 
benefit of the heirs, executors and administrators of such person. 

   (g) The Corporation may purchase and maintain insurance on behalf of any 
person who is or was a director, officer, employee, or agent of the 
Corporation, 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 Corporation pay for that portion of the premium, if any, for 
insurance to indemnify any officer or director against liability for any act 
for which the Corporation itself is not permitted to indemnify him. 

   (h) Nothing contained in this Section shall be construed to protect any 
director or officer of the Corporation against any liability to the 
Corporation 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. 

   (i) Any indemnification of, or advance of expenses to, a director in 
accordance with this Section, if arising out of a proceeding by or in the 
right of the Corporation, shall be reported in writing to the shareholders 
with the notice of the next stockholders' meeting or prior to the meeting. 

                                  ARTICLE IV 
                                  COMMITTEES 

   SECTION 4.1. EXECUTIVE AND OTHER COMMITTEES.  The Board of Directors, by 
resolution adopted by a majority of the whole Board, may designate an 
Executive Committee and/or other committees, each committee to consist of two 
(2) or more of the directors of the Corporation and may delegate to such 
committees, in the intervals between meetings of the Board of Directors, any 
or all of the powers of the Board of Directors in the management of the 
business and affairs of the Corporation, except the power to: declare 
dividends or distributions of stock; issue stock; recommend to stockholders 
any action requiring stockholder approval; amend the By-Laws of the 
Corporation; or approve any merger or share exchange which does not require 
shareholder approval. In the absence of any member of any such committee, the 
members thereof present at any meeting, whether or not they constitute a 
quorum, may appoint a member of the Board of Directors to act in place of 
such absent member. Each such committee shall keep a record of its 
proceedings. 

                                        6
<PAGE>

   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 Board of 
Directors at the meeting thereof next succeeding to the taking of such 
action. 

   SECTION 4.2. ADVISORY COMMITTEE. The Board of Directors may appoint an 
advisory committee which shall be composed of persons who do not serve the 
Corporation in any other capacity and which shall have advisory functions 
with respect to the investments of the Corporation, but which shall have no 
power to determine that any security or other investment shall be purchased, 
sold or otherwise disposed of by the Corporation. The number of persons 
constituting any such advisory committee shall be determined from time to 
time by the Board of Directors. 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 Board of Directors may from 
time to time determine to be appropriate. 

   SECTION 4.3. 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 Board appointed pursuant to Section 4.1 
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 V 
                                   OFFICERS 

   SECTION 5.1. EXECUTIVE OFFICERS.  The executive officers of the 
Corporation shall be a Chairman of the Board, a President, one or more Vice 
Presidents, a Secretary and a Treasurer. The Chairman of the Board shall be 
selected from among the directors but none of the other executive officers 
need be a member of the Board of Directors. 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 Corporation shall be elected annually 
by the Board of Directors at its organizational meeting following the meeting 
of stockholders at which the Board of Directors was elected, and each 
executive officer so elected shall hold office until his successor is elected 
and has qualified. 

   SECTION 5.2. OTHER OFFICERS AND AGENTS. The Board of Directors 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 Board of Directors 
shall at any time or from time to time deem advisable. 

   SECTION 5.3. TERM, REMOVAL AND VACANCIES. Each officer of the Corporation 
shall hold office until his successor is elected and has qualified. Any 
officer or agent of the Corporation may be removed by the Board of Directors 
whenever, in its judgment, the best interests of the Corporation will be 
served thereby, but such removal shall be without prejudice to the 
contractual rights, if any, of the person so removed. 

   SECTION 5.4. COMPENSATION OF OFFICERS. The compensation of officers and 
agents of the Corporation shall be fixed by the Board of Directors, or by the 
President to the extent provided by the Board of Directors with respect to 
officers appointed by the President. 

   SECTION 5.5. POWER AND DUTIES. All officers and agents of the Corporation, 
as between themselves and the Corporation, shall have such authority and 
perform such duties in the management of the Corporation as may be provided 
in or pursuant to these By-Laws, or, to the extent not so provided, as may be 
prescribed by the Board of Directors; provided, that no rights of any third 
party shall be affected or impaired by any such By-Law or resolution of the 
Board unless he has knowledge thereof. 

                                        7
<PAGE>

   SECTION 5.6. THE CHAIRMAN OF THE BOARD. The Chairman shall preside at all 
meetings of the stockholders and of the Board of Directors; shall be a 
signatory on all Annual and Semi-Annual Reports as may be sent to 
stockholders; and he shall perform such other duties as the Board of 
Directors may from time to time prescribe. 

   SECTION 5.7. THE PRESIDENT. (a) The President shall be the chief executive 
officer of the Corporation; he shall have general and active management of 
the business of the Corporation, shall see that all orders and resolutions of 
the Board of Directors 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 stockholders and the Board of Directors; and he shall perform 
such other duties as the Board of Directors may, from time to time, 
prescribe. 

   SECTION 5.8. 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 Board of Directors. 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 Board of Directors 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 Board of Directors or 
the President may from time to time prescribe. 

   SECTION 5.9. 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 Board of Directors or the President. 

   SECTION 5.10. THE SECRETARY. The Secretary shall attend all meetings of 
the Board of Directors and all meetings of the stockholders and record all 
the proceedings of the meetings of the stockholders and of the Board of 
Directors 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 stockholders and special meetings of 
the Board of Directors, and shall perform such other duties and have such 
powers as the Board of Directors, may from time to time prescribe. He shall 
keep in safe custody the seal of the Corporation 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 5.11. THE ASSISTANT SECRETARIES. The Assistant Secretary, or, if 
there be more than one, the Assistant Secretaries in the order determined by 
the Board of Directors 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 Board of 
Directors or the President may from time to time prescribe. 

   SECTION 5.12. THE TREASURER. The Treasurer shall be the chief financial 
officer of the Corporation. He shall keep or cause to be kept full and 
accurate accounts or receipts and disbursements in books belonging to the 
Corporation, and he shall render to the Board of Directors whenever any of 
them require it, an account of his transactions as Treasurer and of the 
financial condition of the Corporation; and he shall perform such other 
duties as the Board of Directors may from time to time prescribe. 

   SECTION 5.13. THE ASSISTANT TREASURERS. The Assistant Treasurer, or, if 
there shall be more than one, the Assistant Treasurers in the order 
determined by the Board of Directors 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 powers as the 
Board of Directors, or the President, may from time to time prescribe. 

   SECTION 5.14. DELEGATION OF DUTIES. Whenever an officer is absent or 
disabled, or whenever for any reason the Board of Directors may deem it 
desirable, the Board may delegate the powers and duties of an officer or 
officers to any other officer or officers or to any Director or Directors. 

                                        8
<PAGE>

                                  ARTICLE VI 
                                CAPITAL STOCK 

   SECTION 6.1. ISSUANCE OF STOCK. The Corporation shall not issue its shares 
of capital stock except as approved by the Board of Directors. 

   SECTION 6.2. CERTIFICATES OF STOCK. Certificates for shares of each class 
of the capital stock of the Corporation shall be in such form and of such 
design as the Board of Directors shall approve, subject to the right of the 
Board of Directors to change such form and design at any time or from time to 
time, and shall be entered in the books of the Corporation 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 Corporation by the 
President, or a Vice President or an Assistant Treasurer, and countersigned 
by the Secretary or an Assistant Secretary or the Treasurer of the 
Corporation; shall be sealed with the corporate seal; and shall contain such 
recitals as may be required by law. Where any stock certificate is signed by 
a Transfer Agent or by a Registrar, the signature of such corporate officers 
and the corporate seal may be facsimile, printed or engraved. The Corporation 
may, at its option, defer the issuance of a certificate or certificates to 
evidence shares of capital stock owned of record by any stockholder until 
such time as demand therefor shall be made upon the Corporation or its 
Transfer Agent, but upon the making of such demand each stockholder shall be 
entitled to such certificate or certificates. 

   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 Corporation, whether 
because of death, resignation or otherwise, before such certificate or 
certificates shall have been delivered by the Corporation, such certificate 
or certificates shall, nevertheless, be adopted by the Corporation 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 
Corporation. 

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

   SECTION 6.3. TRANSFER OF STOCK. Transfers of shares of the capital stock 
of the Corporation shall be made only on the books of the Corporation by the 
holder thereof, or by his attorney thereunto duly authorized by a power of 
attorney duly executed and filed with the Corporation or a Transfer Agent of 
the Corporation, if any, upon written request in proper form if no share 
certificate has been issued, or in the event such certificate has been 
issued, upon presentation and surrender in proper form of said certificate. 

   SECTION 6.4. RECORD DATE. The Board of Directors may fix in advance a date 
as the record date for the purpose of determining stockholders entitled to 
notice of, or to vote at, any meeting of stockholders, or stockholders 
entitled to receive payment of any dividend or the allotment of any rights, 
or in order to make a determination of stockholders for any other purpose. 
Such date, in any case shall be not more than ninety (90) days, and in case 
of a meeting of stockholders not less than ten (10) days prior to the date on 
which particular action requiring such determination of stockholders is to be 
taken. In lieu of fixing a record date the Board of Directors may provide 
that the stock transfer books shall be closed for a stated period but not to 
exceed, in any case, twenty (20) days. If the stock transfer books are closed 
for the purpose of determining stockholders entitled to notice of a vote at a 
meeting of stockholders, such books shall be closed for at least ten (10) 
days immediately preceding such meeting. 

   SECTION 6.5. LOST, STOLEN, DESTROYED AND MULTILATED CERTIFICATES. The 
Board of Directors may direct a new certificate or certificates to be issued 
in place of any certificate or certificates theretofore issued by the 
Corporation alleged to have been lost, stolen or destroyed, upon satisfactory 
proof of such loss, theft, or destruction; and the Board of Directors may, in 
its discretion, require the owner of the lost, stolen or destroyed 
certificate, or his legal representative, to give to the Corporation 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. 

                                        9
<PAGE>

   SECTION 6.6. REGISTERED OWNERS OF STOCK. The Corporation shall be entitled 
to recognize the exclusive right of a person registered on its books as the 
owner of shares of stock to receive dividends, and to vote as such owner, and 
to hold liable for calls and assessments a person registered on its books as 
the owner of shares of stock, and shall not be bound to recognize any 
equitable or other claim to or interest in such share or shares on the part 
of any other person, whether or not it shall have express or other notice 
thereof, except as otherwise provided by the laws of Maryland. 

   SECTION 6.7. FRACTIONAL DENOMINATIONS. Subject to any applicable 
provisions of law and the Charter of the Corporation, the Corporation may 
issue shares of its capital stock in fractional denominations, provided that 
the transactions in which and the terms and conditions upon which shares in 
fractional denominations may be issued may from time to time be limited or 
determined by or under the authority of the Board of Directors. 

                                 ARTICLE VII 
                         SALE AND REDEMPTION OF STOCK 

   SECTION 7.1. SALE OF STOCK. Upon the sale of each share of its Common 
Stock, except as otherwise permitted by applicable laws and regulations, the 
Corporation shall receive in cash or in securities valued as provided in 
Article VIII of these By-Laws, not less than the current net asset value 
thereof, exclusive of any distributing commission or discount, and in no 
event less than the par value thereof. 

   SECTION 7.2. REDEMPTION OF STOCK. Subject to and in accordance with any 
applicable laws and regulations and any applicable provisions of the 
Corporation's Articles of Incorporation, the Corporation shall redeem all 
outstanding shares of its capital stock duly delivered or offered for 
redemption by any registered stockholder in a manner prescribed by or under 
authority of the Board of Directors. Any shares so delivered or offered for 
redemption shall be redeemed at a redemption price prescribed by the Board of 
Directors in accordance with applicable laws and regulations; provided that 
in no event shall such price be less than the applicable net asset value of 
such shares as determined in accordance with the provisions of Article VIII 
of these By-Laws. The Corporation may redeem, at current net asset value, 
shares not offered for redemption held by any shareholder whose shares have a 
value of less than $100, or such lesser amount as may be fixed by the Board 
of Directors; provided that before the Corporation redeems such shares it 
must notify the shareholder that the value of his shares is less than $100 
and allow him 60 days to make an additional investment in an amount which 
will increase the value of his account to $100 or more. The Corporation shall 
pay redemption prices in cash. 

                                 ARTICLE VIII 
                DETERMINATION OF NET ASSET VALUE; VALUATION OF 
                    PORTFOLIO SECURITIES AND OTHER ASSETS 

   SECTION 8.1. NET ASSET VALUE. The net asset value of a share of Common 
Stock of the Corporation shall be determined in accordance with applicable 
laws and regulations under the supervision of such persons and at such time 
or times as shall from time to time be prescribed by the Board of Directors. 
Each such determination shall be made by subtracting from the value of the 
assets of the Corporation (as determined pursuant to Section 8.2 of these 
By-Laws) the amount of its liabilities, dividing the remainder by the number 
of shares of Common Stock issued and outstanding, and adjusting the results 
to the nearest full cent per share. 

   SECTION 8.2. VALUATION OF PORTFOLIO SECURITIES AND OTHER ASSETS. Except as 
otherwise required by any applicable law or regulation of any regulatory 
agency having jurisdiction over the activities of the Corporation, the 
Corporation shall determine the value of its portfolio securities and other 
assets as follows: 

      (a) securities for which market quotations are readily available shall 
    be valued at current market value determined in such manner as the Board 
    of Directors may from time to time prescribe; 

      (b) all other securities and assets shall be valued at amounts deemed 
    best to reflect their fair value as determined in good faith by or under 
    the supervision of such persons and at such time or times as shall from 
    time to time be prescribed by the Board of Directors. 

                                       10
<PAGE>

   All quotations, sale prices, bid and asked prices and other information 
shall be obtained from such sources as the persons making such determination 
believe to be reliable and any determination of net asset value based thereon 
shall be conclusive. 

                                  ARTICLE IX 
                         DIVIDENDS AND DISTRIBUTIONS 

   Subject to any applicable provisions of law and the Charter of the 
Corporation, dividends and distributions upon the Common Stock of the 
Corporation may be declared at such intervals as the Board of Directors may 
determine, in cash, in securities or other property, or in shares of stock of 
the Corporation, from any sources permitted by law, all as the Board of 
Directors shall from time to time determine. 

   Inasmuch as the computation of net income and net profits from the sale of 
securities or other properties for federal income tax purposes may vary from 
the computation thereof on the books of the Corporation, the Board of 
Directors shall have power, in its discretion, to distribute as income 
dividends and as capital gain distributions, respectively, amounts sufficient 
to enable the Corporation to avoid or reduce liability for federal income 
taxes. 

                                  ARTICLE X 
                              BOOKS AND RECORDS 

   SECTION 10.1. LOCATION. The books and records of the Corporation may be 
kept outside the State of Maryland at such place or places as the Board of 
Directors may from time to time determine, except as otherwise required by 
law. 

   SECTION 10.2. STOCK LEDGERS. The Corporation shall maintain at the office 
of its Transfer Agent an original stock ledger containing the names and 
addresses of all stockholders and the number of shares held by each 
stockholder. Such stock ledger may be in written form or any other form 
capable of being converted into written form within a reasonable time for 
visual inspection. 

   SECTION 10.3. ANNUAL STATEMENT. The President or a Vice President or the 
Treasurer shall prepare or cause to be prepared annually a full and correct 
statement of the affairs of the Corporation, including a statement of assets 
and liabilities and a statement of operations for the preceding fiscal year, 
which shall be submitted at the annual meeting of stockholders if such 
meeting be held, and shall be filed within twenty (20) days thereafter at the 
principal office of the Corporation in the State of Maryland. 

                                  ARTICLE XI 
                               WAIVER OF NOTICE 

   Whenever any notice of the time, place or purpose of any meeting of 
stockholders, directors, or of any committee is required to be given under 
the provisions of the statute or under the provisions of the Charter of the 
Corporation 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 Directors or committee in person, shall be deemed equivalent 
to the giving of such notice to such person. 

                                 ARTICLE XII 
                                MISCELLANEOUS 

   SECTION 12.1. SEAL. The Board of Directors shall adopt a corporate seal, 
which shall be in the form of a circle, and shall have inscribed thereon the 
name of the Corporation, the year of its incorporation, and the words 
"Corporate Seal--Maryland." Said seal may be used by causing it or a 
facsimile thereof to be impressed or affixed or reproduced or otherwise. 

                                       11           
<PAGE>

   SECTION 12.2. FISCAL YEAR. The fiscal year of the Corporation shall end on 
such date as the Board of Directors may by resolution specify, and the Board 
of Directors may by resolution change such date for future fiscal years at 
any time and from time to time. 

   SECTION 12.3. ORDERS FOR PAYMENT OF MONEY. All orders or instructions for 
the payment of money of the Corporation, and all notes or other evidences of 
indebtedness issued in the name of the Corporation, shall be signed by such 
officer or officers or such other person or persons as the Board of Directors 
may from time to time designate, or as may be specified in or pursuant to the 
agreement between the Corporation and the bank or trust company appointed as 
Custodian of the securities and funds of the Corporation. 

                                 ARTICLE XIII 
                     COMPLIANCE WITH FEDERAL REGULATIONS 

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

                                 ARTICLE XIV 
                                  AMENDMENTS 

   These By-Laws may be amended, altered, or repealed at any annual or 
special meeting of the stockholders by the affirmative vote of the holders of 
a majority of the shares of capital stock of the Corporation issued and 
outstanding and entitled to vote, provided notice of the general purpose of 
the proposed amendment, alteration or repeal is given in the notice of said 
meeting; or, at any meeting of the Board of Directors, by a vote of a 
majority of the whole Board of Directors, provided, however, that any By-Law 
or amendment or alteration of the By-Laws adopted by the Board of Directors 
may be amended, altered or repealed and any By-Law repealed by the Board of 
Directors may be reinstated, by vote of the stockholders of the Corporation. 

                                       12           

<PAGE>

CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use in the Statement of Additional Information
constituting part of this Post-Effective Amendment No. 19 to the registration
statement on Form N-1A (the "Registration Statement") of our report dated April
11, 1997, relating to the financial statements and financial highlights of Dean
Witter Natural Resource Development Securities Inc., 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 references to us under the headings
"Independent Accountants" and "Experts" in such Statement of Additional
Information and to the reference to us under the heading "Financial Highlights"
in such Prospectus.



/s/ Price Waterhouse LLP
PRICE WATERHOUSE LLP
1177 Avenue of the Americas
New York, New York 10036
April 11, 1997


<PAGE>

                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                       NATURAL RESOURCE DEVELOPMENT SECURTITIES




(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            NUMBER OF       AVERAGE ANNUAL 
   INVESTED - P          28-Feb-97            YEARS - n       TOTAL RETURN - T
   ------------          ---------            ---------       ----------------

      29-Feb-96          $1,158.80                1                15.88%

      28-Feb-92          $1,865.80                5                13.29%

      28-Feb-87          $2,727.70               10                10.56%


(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)


<TABLE>
<CAPTION>

                                                 (C)                                    (B)
        $1,000           EV AS OF              TOTAL              NUMBER OF       AVERAGE ANNUAL 
   INVESTED - P          28-Feb-97           RETURN - TR          YEARS - n       TOTAL RETURN - t
   ------------          ---------           -----------          ---------       ----------------
<S>                       <C>               <C>                  <C>             <C>             
      29-Feb-96          $1,208.80              20.88%                 1                20.88%

      28-Feb-92          $1,885.80              88.58%                 5                13.53%
 
      28-Feb-87          $2,727.70             172.77%                10                10.56%

</TABLE>

(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>
       $10,000         TOTAL          (D)   GROWTH OF         (E)   GROWTH OF          (F)   GROWTH OF
   INVESTED - P    RETURN - TR   $10,000 INVESTMENT - G    $50,000 INVESTMENT - G  $100,000 INVESTMENT - G
   ------------    -----------   ----------------------    ----------------------  -----------------------
<S>                <C>           <C>                       <C>                     <C>                    
      30-Mar-81       223.35              $32,335                 $161,675                $323,350
</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          FEB-28-1997
<PERIOD-END>                               FEB-28-1997
<INVESTMENTS-AT-COST>                      233,458,101
<INVESTMENTS-AT-VALUE>                     244,130,014
<RECEIVABLES>                               17,214,664
<ASSETS-OTHER>                                  32,621
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             261,377,299
<PAYABLE-FOR-SECURITIES>                    12,524,343
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      864,273
<TOTAL-LIABILITIES>                         13,388,616
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   215,489,116
<SHARES-COMMON-STOCK>                       18,589,547
<SHARES-COMMON-PRIOR>                       12,017,301
<ACCUMULATED-NII-CURRENT>                       50,909
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     21,775,646
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                    10,673,012
<NET-ASSETS>                               247,988,683
<DIVIDEND-INCOME>                            2,993,820
<INTEREST-INCOME>                              702,288
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               3,593,196
<NET-INVESTMENT-INCOME>                        102,912
<REALIZED-GAINS-CURRENT>                    49,178,705
<APPREC-INCREASE-CURRENT>                 (15,813,380)
<NET-CHANGE-FROM-OPS>                       33,468,237
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (287,205)
<DISTRIBUTIONS-OF-GAINS>                  (30,377,434)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     24,642,984
<NUMBER-OF-SHARES-REDEEMED>               (20,151,281)
<SHARES-REINVESTED>                          2,080,543
<NET-CHANGE-IN-ASSETS>                      95,327,241
<ACCUMULATED-NII-PRIOR>                        235,202
<ACCUMULATED-GAINS-PRIOR>                    2,974,375
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              3,593,196
<AVERAGE-NET-ASSETS>                       195,654,685
<PER-SHARE-NAV-BEGIN>                            12.70
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                           2.66
<PER-SHARE-DIVIDEND>                            (0.02)
<PER-SHARE-DISTRIBUTIONS>                       (2.00)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              13.34
<EXPENSE-RATIO>                                   1.84
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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