WITTER DEAN DIVIDEND GROWTH SECURITIES INC
497, 1997-07-31
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<PAGE>
              PROSPECTUS
              JULY 28, 1997
 
              Dean Witter Dividend Growth Securities Inc. (the "Fund") is an
open-end, diversified management investment company whose investment objective
is to provide reasonable current income and long-term growth of income and
capital. The Fund invests primarily in common stock of companies with a record
of paying dividends and the potential for increasing dividends. (See "Investment
Objective and Policies.")
 
               The Fund offers four classes of shares (each, a "Class"), each
with a different combination of sales charges, ongoing fees and other features.
The different distribution arrangements permit an investor to choose the method
of purchasing shares that the investor believes is most beneficial given the
amount of the purchase, the length of time the investor expects to hold the
shares and other relevant circumstances. Except as discussed herein, shares of
the Fund held prior to July 28, 1997 have been designated Class B shares. (See
"Purchase of Fund Shares--Alternative Purchase Arrangements.")
 
               This Prospectus sets forth concisely the information you should
know before investing in the Fund. It should be read and retained for future
reference. Additional information about the Fund is contained in the Statement
of Additional Information, dated July 28, 1997, which has been filed with the
Securities and Exchange Commission, and which is available at no charge upon
request of the Fund at the address or telephone numbers listed on this page. The
Statement of Additional Information is incorporated herein by reference.
 
     DEAN WITTER DISTRIBUTORS INC.
      DISTRIBUTOR
 
      TABLE OF CONTENTS
 
Prospectus Summary/2
Summary of Fund Expenses/4
Financial Highlights/6
The Fund and its Management/7
Investment Objective and Policies/7
  Risk Considerations and
   Investment Practices/8
Investment Restrictions/11
Purchase of Fund Shares/12
Shareholder Services/23
Redemptions and Repurchases/26
Dividends, Distributions and Taxes/27
Performance Information/28
Additional Information/28
 
SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK, AND THE SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT
INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD, OR ANY OTHER AGENCY.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
    Dean Witter
    Dividend Growth Securities Inc.
    Two World Trade Center
    New York, New York 10048
    (212) 392-2550 or
    (800) 869-NEWS (toll-free)
<PAGE>
PROSPECTUS SUMMARY
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>               <C>
The               The Fund, a Maryland corporation, is an open-end, diversified management investment company
Fund              investing primarily in common stock of companies with a record of paying dividends and the potential
                  for increasing dividends (see page 7).
- ----------------------------------------------------------------------------------------------------------------------
Shares Offered    Shares of common stock with $0.01 par value (see page 28). The Fund offers four Classes of shares,
                  each with a different combination of sales charges, ongoing fees and other features (see pages
                  12-22).
- ----------------------------------------------------------------------------------------------------------------------
Minimum           The minimum initial investment for each Class is $1,000 ($100 if the account is opened through
Purchase          EasyInvest-SM-). Class D shares are only available to persons investing $5 million or more and to
                  certain other limited categories of investors. For the purpose of meeting the minimum $5 million
                  investment for Class D shares, and subject to the $1,000 minimum initial investment for each Class
                  of the Fund, an investor's existing holdings of Class A shares and shares of funds for which Dean
                  Witter InterCapital Inc. serves as investment manager ("Dean Witter Funds") that are sold with a
                  front-end sales charge, and concurrent investments in Class D shares of the Fund and other Dean
                  Witter Funds that are multiple class funds, will be aggregated. The minimum subsequent investment is
                  $100 (see page 12).
- ----------------------------------------------------------------------------------------------------------------------
Investment        The investment objective of the Fund is to provide reasonable current income and long-term growth of
Objective         income and capital.
- ----------------------------------------------------------------------------------------------------------------------
Investment        Dean Witter InterCapital Inc., ("InterCapital"), the Investment Manager of the Fund, and its
Manager           wholly-owned subsidiary, Dean Witter Services Company Inc., serve in various investment management,
                  advisory, management and administrative capacities to 100 investment companies and other portfolios
                  with assets of approximately $96.6 billion at June 30, 1997 (see page 7).
- ----------------------------------------------------------------------------------------------------------------------
Management        The Investment Manager receives a monthly fee at an annual rate of 0.625 of 1% of daily net assets,
Fee               scaled down on assets over $250 million. The fee should not be compared with fees paid by other
                  investment companies without also considering applicable sales loads and distribution fees,
                  including those noted below (see page 7).
- ----------------------------------------------------------------------------------------------------------------------
Distributor and   Dean Witter Distributors Inc. (the "Distributor"). The Fund has adopted a distribution plan pursuant
Distribution Fee  to Rule 12b-1 under the Investment Company Act (the "12b-1 Plan") with respect to the distribution
                  fees paid by the Class A, Class B and Class C shares of the Fund to the Distributor. The entire
                  12b-1 fee payable by Class A and a portion of the 12b-1 fee payable by each of Class B and Class C
                  equal to 0.25% of the average daily net assets of the Class are currently each characterized as a
                  service fee within the meaning of the National Association of Securities Dealers, Inc. guidelines.
                  The remaining portion of the 12b-1 fee, if any, is characterized as an asset-based sales charge (see
                  pages 12 and 21).
- ----------------------------------------------------------------------------------------------------------------------
Alternative       Four classes of shares are offered:
Purchase
Arrangements      - Class A shares are offered with a front-end sales charge, starting at 5.25% and reduced for larger
                  purchases. Investments of $1 million or more (and investments by certain other limited categories of
                  investors) are not subject to any sales charge at the time of purchase but a contingent deferred
                  sales charge ("CDSC") of 1.0% may be imposed on redemptions within one year of purchase. The Fund is
                  authorized to reimburse the Distributor for specific expenses incurred in promoting the distribution
                  of the Fund's Class A shares and servicing shareholder accounts pursuant to the Fund's 12b-1 Plan.
                  Reimbursement may in no event exceed an amount equal to payments at an annual rate of 0.25% of
                  average daily net assets of the Class (see pages 12, 15 and 21).
</TABLE>
    
 
                                       2
<PAGE>
- --------------------------------------------------------------------------------
   
<TABLE>
<S>               <C>
                  - Class B shares are offered without a front-end sales charge, but will in most cases be subject to
                  a CDSC (scaled down from 5.0% to 1.0%) if redeemed within six years after purchase. The CDSC will be
                  imposed on any redemption of shares if after such redemption the aggregate current value of a Class
                  B account with the Fund falls below the aggregate amount of the investor's purchase payments made
                  during the six years preceding the redemption. A different CDSC schedule applies to investments by
                  certain qualified plans. Class B shares are also subject to a 12b-1 fee assessed at the annual rate
                  of 1.0% of the lesser of: (a) the average daily net sales of the Fund's Class B shares since
                  implementation of the 12b-1 Plan on July 2, 1984, or (b) the average daily net assets of Class B
                  attributable to shares issued since implementation of the 12b-1 Plan. All shares of the Fund held
                  prior to July 28, 1997 (other than shares which were purchased prior to July 2, 1984 (and, with
                  respect to such shares, certain shares acquired through reinvestment of dividends and capital gains
                  distributions) and the shares held by certain employee benefit plans established by Dean Witter
                  Reynolds Inc. and its affiliate, SPS Transaction Services, Inc.) have been designated Class B
                  shares. Shares which were purchased prior to July 2, 1984 (and, with respect to such shares, certain
                  shares acquired through reinvestment of dividends and capital gains distributions) and shares held
                  by those employee benefit plans prior to July 28, 1997 have been designated Class D shares. Shares
                  held before May 1, 1997 that have been designated Class B shares will convert to Class A shares in
                  May, 2007. In all other instances, Class B shares convert to Class A shares approximately ten years
                  after the date of the original purchase (see pages 12, 17 and 21).
 
                  - Class C shares are offered without a front-end sales charge, but will in most cases be subject to
                  a CDSC of 1.0% if redeemed within one year after purchase. The Fund is authorized to reimburse the
                  Distributor for specific expenses incurred in promoting the distribution of the Fund's Class C
                  shares and servicing shareholder accounts pursuant to the Fund's 12b-1 Plan. Reimbursement may in no
                  event exceed an amount equal to payments at an annual rate of 1.0% of average daily net assets of
                  the Class (see pages 12, 20 and 21).
 
                  - Class D shares are offered only to investors meeting an initial investment minimum of $5 million
                  and to certain other limited categories of investors. Class D shares are offered without a front-end
                  sales charge or CDSC and are not subject to any 12b-1 fee (see pages 12, 20 and 21).
- ----------------------------------------------------------------------------------------------------------------------
Dividends         Dividends from net investment income are paid quarterly; and distributions from net capital gains,
and               if any, are distributed at least annually. The Fund may, however, determine to retain all or part of
Capital Gains     any net long-term capital gains in any year for reinvestment. Dividends and capital gains
Distributions     distributions paid on shares of a Class are automatically reinvested in additional shares of the
                  same Class at net asset value unless the shareholder elects to receive cash. Shares acquired by
                  dividend and distribution reinvestment will not be subject to any sales charge or CDSC (see pages 23
                  and 27).
- ----------------------------------------------------------------------------------------------------------------------
Redemption        Shares are redeemable by the shareholder at net asset value less any applicable CDSC on Class A,
                  Class B or Class C shares. An account may be involuntarily redeemed if the total value of the
                  account is less than $100 or, if the account was opened through EasyInvest-SM-, if after twelve
                  months the shareholder has invested less than $1,000 in the account (see page 26).
- ----------------------------------------------------------------------------------------------------------------------
Risks             The net asset value of the Fund's shares will fluctuate with changes in market value of portfolio
                  securities. Dividends payable by the Fund will vary in relation to the amounts of dividends and
                  interest earned on portfolio securities. 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 8-11).
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
                          ELSEWHERE IN THE PROSPECTUS
                AND IN THE STATEMENT OF ADDITIONAL INFORMATION.
 
                                       3
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
    The following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The expenses and fees set forth in the table are based on
the expenses and fees for the fiscal year ended February 28, 1997.
 
<TABLE>
<CAPTION>
                                                                      Class A      Class B      Class C      Class D
                                                                    -----------  -----------  -----------  -----------
<S>                                                                 <C>          <C>          <C>          <C>
SHAREHOLDER TRANSACTION EXPENSES
- ------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases (as a percentage of
  offering price).................................................        5.25%(1)       None       None         None
Sales Charge Imposed on Dividend Reinvestments....................        None         None         None         None
Maximum Contingent Deferred Sales Charge (as a percentage of
  original purchase price or redemption proceeds).................        None(2)       5.00%(3)       1.00%(4)       None
Redemption Fees...................................................        None         None         None         None
Exchange Fee......................................................        None         None         None         None
 
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET
  ASSETS)
- ------------------------------------------------------------------
Management Fees...................................................        0.39%        0.39%        0.39%        0.39%
12b-1 Fees (5) (6)................................................        0.25%        0.74%        1.00%        None
Other Expenses....................................................        0.09%        0.09%        0.09%        0.09%
Total Fund Operating Expenses (7).................................        0.73%        1.22%        1.48%        0.48%
</TABLE>
 
- ------------
(1) REDUCED FOR PURCHASES OF $25,000 AND OVER (SEE "PURCHASE OF FUND
    SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES").
 
(2) INVESTMENTS THAT ARE NOT SUBJECT TO ANY SALES CHARGE AT THE TIME OF PURCHASE
    ARE SUBJECT TO A CDSC OF 1.00% THAT WILL BE IMPOSED ON REDEMPTIONS MADE
    WITHIN ONE YEAR AFTER PURCHASE, EXCEPT FOR CERTAIN SPECIFIC CIRCUMSTANCES
    (SEE "PURCHASE OF FUND SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A
    SHARES").
 
(3) THE CDSC IS SCALED DOWN TO 1.00% DURING THE SIXTH YEAR, REACHING ZERO
    THEREAFTER.
 
(4) ONLY APPLICABLE TO REDEMPTIONS MADE WITHIN ONE YEAR AFTER PURCHASE (SEE
    "PURCHASE OF FUND SHARES-- LEVEL LOAD ALTERNATIVE--CLASS C SHARES").
 
(5) THE 12B-1 FEE IS ACCRUED DAILY AND PAYABLE MONTHLY. THE ENTIRE 12B-1 FEE
    PAYABLE BY CLASS A AND A PORTION OF THE 12B-1 FEE PAYABLE BY EACH OF CLASS B
    AND CLASS C EQUAL TO 0.25% OF THE AVERAGE DAILY NET ASSETS OF THE CLASS ARE
    CURRENTLY EACH CHARACTERIZED AS A SERVICE FEE WITHIN THE MEANING OF NATIONAL
    ASSOCIATION OF SECURITIES DEALERS, INC. ("NASD") GUIDELINES AND ARE PAYMENTS
    MADE FOR PERSONAL SERVICE AND/OR MAINTENANCE OF SHAREHOLDER ACCOUNTS. THE
    REMAINDER OF THE 12B-1 FEE, IF ANY, IS AN ASSET-BASED SALES CHARGE, AND IS A
    DISTRIBUTION FEE PAID TO THE DISTRIBUTOR TO COMPENSATE IT FOR THE SERVICES
    PROVIDED AND THE EXPENSES BORNE BY THE DISTRIBUTOR AND OTHERS IN THE
    DISTRIBUTION OF THE FUND'S SHARES (SEE "PURCHASE OF FUND SHARES--PLAN OF
    DISTRIBUTION").
 
(6) UPON CONVERSION OF CLASS B SHARES TO CLASS A SHARES, SUCH SHARES WILL BE
    SUBJECT TO THE LOWER 12B-1 FEE APPLICABLE TO CLASS A SHARES. NO SALES CHARGE
    IS IMPOSED AT THE TIME OF CONVERSION OF CLASS B SHARES TO CLASS A SHARES.
    CLASS C SHARES DO NOT HAVE A CONVERSION FEATURE AND, THEREFORE, ARE SUBJECT
    TO AN ONGOING 1.00% DISTRIBUTION FEE (SEE "PURCHASE OF FUND
    SHARES--ALTERNATIVE PURCHASE ARRANGEMENTS").
 
(7) THERE WERE NO OUTSTANDING SHARES OF CLASS A, CLASS C OR CLASS D PRIOR TO THE
    DATE OF THIS PROSPECTUS. ACCORDINGLY, "TOTAL FUND OPERATING EXPENSES," AS
    SHOWN ABOVE WITH RESPECT TO THOSE CLASSES, ARE BASED UPON THE SUM OF 12B-1
    FEES, MANAGEMENT FEES AND ESTIMATED "OTHER EXPENSES."
 
                                       4
<PAGE>
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
EXAMPLES                                                                              1 Year       3 Years      5 Years
- ----------------------------------------------------------------------------------  -----------  -----------  -----------
<S>                                                                                 <C>          <C>          <C>
You would pay the following expenses on a $1,000 investment assuming (1) a 5%
annual return and (2) redemption at the end of each time period:
    Class A.......................................................................   $      60    $      75    $      91
    Class B.......................................................................   $      62    $      69    $      87
    Class C.......................................................................   $      25    $      47    $      81
    Class D.......................................................................   $       5    $      15    $      27
 
You would pay the following expenses on the same $1,000 investment assuming no
redemption at the end of the period:
    Class A.......................................................................   $      60    $      75    $      91
    Class B.......................................................................   $      12    $      39    $      67
    Class C.......................................................................   $      15    $      47    $      81
    Class D.......................................................................   $       5    $      15    $      27
 
<CAPTION>
EXAMPLES                                                                             10 Years
- ----------------------------------------------------------------------------------  -----------
<S>                                                                                 <C>
You would pay the following expenses on a $1,000 investment assuming (1) a 5%
annual return and (2) redemption at the end of each time period:
    Class A.......................................................................   $     138
    Class B.......................................................................   $     148
    Class C.......................................................................   $     177
    Class D.......................................................................   $      60
You would pay the following expenses on the same $1,000 investment assuming no
redemption at the end of the period:
    Class A.......................................................................   $     138
    Class B.......................................................................   $     148
    Class C.......................................................................   $     177
    Class D.......................................................................   $      60
</TABLE>
 
    THE ABOVE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR
FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF EACH CLASS MAY BE GREATER OR
LESS THAN THOSE SHOWN.
 
    The purpose of this table is to assist the investor in understanding the
various costs and expenses that an investor in the Fund will bear directly or
indirectly. For a more complete description of these costs and expenses, see
"The Fund and its Management," "Purchase of Fund Shares--Plan of Distribution"
and "Redemptions and Repurchases."
 
    Long-term shareholders of Class B and Class C may pay more in sales charges,
including distribution fees, than the economic equivalent of the maximum
front-end sales charges permitted by the NASD.
 
                                       5
<PAGE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
    The  following  ratios and  per  share data  for  a share  of  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  and 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  Stockholders, which  may be  obtained without
charge upon request to the Fund. All shares  of the Fund held prior to July  28,
1997,  other than shares which  were purchased prior to  July 2, 1984 (and, with
respect  to  such  shares,  certain  shares  acquired  through  reinvestment  of
dividends  and capital gains distributions (collectively, the "Old Shares")) and
shares held  by  certain  employee  benefit plans  established  by  Dean  Witter
Reynolds  Inc.  and its  affiliate, SPS  Transaction  Services, Inc.,  have been
designated Class B  shares. The  Old Shares and  shares held  by those  employee
benefit plans prior to July 28, 1997 have been designated Class D shares.
<TABLE>
<CAPTION>
                                                                 FOR THE YEAR ENDED FEBRUARY 28
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
                                      -----------------------------------------------------------------------------------
 
<CAPTION>
                                       1997       1996*      1995       1994       1993       1992*      1991       1990
                                      -----------------------------------------------------------------------------------
<S>                                  <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
 
PER SHARE OPERATING PERFORMANCE:
  Net asset value, beginning of
   period..........................  $   39.65  $   31.16  $   30.86  $   28.70  $   27.01  $   23.50  $   22.47  $   20.32
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Net investment income............       0.81       0.75       0.72       0.68       0.70       0.71       0.79       0.72
  Net realized and unrealized gain
   (loss)..........................       7.55       8.50       0.24       2.16       1.72       3.63       1.04       2.83
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Total from investment
   operations......................       8.36       9.25       0.96       2.84       2.42       4.34       1.83       3.55
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Less dividends and distributions
   from:
    Net investment income..........      (0.88)     (0.67)     (0.66)     (0.68)     (0.69)     (0.76)     (0.80)     (0.76)
    Net realized gain..............      (0.53)     (0.09)    --         --          (0.04)     (0.07)    --          (0.64)
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Total dividends and
   distributions...................      (1.41)     (0.76)     (0.66)     (0.68)     (0.73)     (0.83)     (0.80)     (1.40)
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  Net asset value, end of period...  $   46.60  $   39.65  $   31.16  $   30.86  $   28.70  $   27.01  $   23.50  $   22.47
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                     ---------  ---------  ---------  ---------  ---------  ---------  ---------  ---------
  TOTAL INVESTMENT RETURN+.........      21.37%     30.01%      3.25%      9.98%      9.13%     18.82%      8.51%     17.85%
 
RATIOS TO AVERAGE NET ASSETS:
  Expenses.........................       1.22%      1.31%      1.42%      1.37%      1.40%      1.42%      1.51%      1.41%
  Net investment income............       1.95%      2.14%      2.42%      2.31%      2.67%      2.91%      3.62%      3.46%
 
SUPPLEMENTAL DATA:
  Net assets, end of period, in
   millions........................  $  12,907  $   9,782  $   7,101  $   6,712  $   5,386  $   4,071  $   3,015  $   2,760
  Portfolio turnover rate..........          4%        10%         6%        13%         8%         5%         5%         3%
  Average commission rate paid.....  $  0.0541     --         --         --         --         --         --         --
 
<CAPTION>
 
<S>                                  <C>        <C>
 
                                       1989       1988*
 
<S>                                  <C>        <C>
PER SHARE OPERATING PERFORMANCE:
  Net asset value, beginning of
   period..........................  $   19.28  $   20.63
                                     ---------  ---------
  Net investment income............       0.68       0.67
  Net realized and unrealized gain
   (loss)..........................       1.78      (0.99)
                                     ---------  ---------
  Total from investment
   operations......................       2.46      (0.32)
                                     ---------  ---------
  Less dividends and distributions
   from:
    Net investment income..........      (0.62)     (0.73)
    Net realized gain..............      (0.80)     (0.30)
                                     ---------  ---------
  Total dividends and
   distributions...................      (1.42)     (1.03)
                                     ---------  ---------
  Net asset value, end of period...  $   20.32  $   19.28
                                     ---------  ---------
                                     ---------  ---------
  TOTAL INVESTMENT RETURN+.........      13.26%     (1.40)%
RATIOS TO AVERAGE NET ASSETS:
  Expenses.........................       1.55%      1.55%
  Net investment income............       3.44%      3.47%
SUPPLEMENTAL DATA:
  Net assets, end of period, in
   millions........................  $   1,860  $   1,824
  Portfolio turnover rate..........          8%         7%
  Average commission rate paid.....     --         --
</TABLE>
 
- ---------------------
 
 * 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.
 
                                       6
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Dean  Witter Dividend  Growth 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 wholly-owned  subsidiary of Morgan Stanley,  Dean Witter, Discover &
Co., a preeminent global financial  services firm that maintains leading  market
positions  in each of its three primary businesses--securities, asset management
and credit services.
 
    InterCapital and its wholly-owned  subsidiary, Dean Witter Services  Company
Inc.,   serve  in  various  investment   management,  advisory,  management  and
administrative capacities  to  100 investment  companies,  thirty of  which  are
listed   on  the  New  York  Stock  Exchange,  with  combined  total  assets  of
approximately $93.1  billion  at June  30,  1997. The  Investment  Manager  also
manages  portfolios of pension  plans, other institutions  and individuals which
aggregated approximately $3.5 billion at such date.
 
    The Fund  has  retained the  Investment  Manager to  provide  administrative
services,  manage its business  affairs and manage the  investment of the Fund's
assets, including the placing of orders  for the purchase and sale of  portfolio
securities.  InterCapital  has retained  Dean  Witter Services  Company  Inc. to
perform the  aforementioned administrative  services for  the Fund.  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 at an annual  rate
of 0.625% of the daily net assets of the Fund up to $250 million, scaled down at
various  asset levels to 0.275% on assets  over $15 billion. For the fiscal year
ended February 28, 1997, the Fund  accrued total compensation to the  Investment
Manager amounting to 0.39% of the Fund's average daily net assets and the Fund's
total expenses amounted to 1.22% of the Fund's average daily net assets.
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The investment objective of the Fund is to provide reasonable current income
and  long-term growth of  income and capital. This  objective is fundamental and
may not be changed without shareholder approval. There is no assurance that  the
objective  will be achieved. The Fund  seeks to achieve its investment objective
primarily through investments  in common  stock of  companies with  a record  of
paying  dividends and the potential for increasing dividends. Net asset value of
the Fund's shares  will fluctuate  with changes  in market  values of  portfolio
securities.  The Fund will attempt to avoid speculative securities or those with
speculative characteristics.
 
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) Up to 30% of the value of the Fund's total assets may be invested in: (a)
convertible debt securities, convertible  preferred securities, U.S.  Government
securities  (securities issued or guaranteed as to principal and interest by the
United States or its agencies and instrumentalities), investment grade corporate
debt securities and/or  money market  instruments when,  in the  opinion of  the
Invest-
 
                                       7
<PAGE>
ment  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 income earned);
or (b)  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.
 
   (2) Notwithstanding any  of the  foregoing limitations, the  Fund may  invest
more  than 30%  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  Fund's  assets.  Any subsequent  change  in any
applicable percentage resulting from  fluctuations in value  or other change  in
total  assets will not  require elimination of any  security from the portfolio.
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.
 
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 government securities or  other 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.
 
RISK CONSIDERATIONS AND INVESTMENT PRACTICES
 
    AMERICAN DEPOSITORY RECEIPTS.  The Fund may invest in ADRs. These securities
may  not necessarily be denominated in the  same currency as the securities into
which they may  be converted.  ADRs are receipts  typically issued  by a  United
States bank or trust company evidencing ownership of the underlying securities.
 
    INVESTMENTS  IN SECURITIES RATED BAA BY MOODY'S OR BBB BY S&P.  The Fund may
invest a portion of their assets in fixed-income securities rated at the time of
purchase Baa or better by Moody's Investors Service, Inc. ("Moody's") or BBB  or
better  by Standard  & Poor's  Corporation ("S&P").  Investments in fixed-income
securities rated either Baa by Moody's or BBB by S&P (the lowest credit  ratings
designated   "investment  grade")  may  have  speculative  characteristics  and,
therefore, changes in economic conditions or other circumstances are more likely
to weaken their capacity to make  principal and interest payments than would  be
the  case with investments in  securities with higher credit  ratings. If a bond
held by the Fund is downgraded by a rating agency to a rating below Baa or  BBB,
the Fund will retain such security in its portfolio until the Investment Manager
determines  that it is practicable to sell  the security without undue market or
tax consequences  to the  Fund. In  the event  that such  downgraded  securities
constitute  5% or more of the Fund's assets, the Investment Manager will seek to
sell immediately sufficient securities to reduce the total to below 5%.
 
    INVESTMENTS IN FIXED-INCOME SECURITIES.   The Fund may  invest a portion  of
its  assets in fixed-income securities.  All fixed-income securities are subject
to two types of risks:  the credit risk and the  interest rate risk. The  credit
risk relates to the ability of the issuer to meet interest or principal payments
or both as they come due. Generally, higher yielding fixed-income securities are
subject  to a credit risk  to a greater extent  than lower yielding fixed-income
securities. The interest rate risk refers
 
                                       8
<PAGE>
to the fluctuations  in the  net asset value  of any  portfolio of  fixed-income
securities  resulting from the  inverse relationship between  price and yield of
fixed-income securities;  that is,  when  the general  level of  interest  rates
rises,  the prices of outstanding fixed-income securities generally decline, and
when interest rates fall, prices generally rise.
 
    CONVERTIBLE SECURITIES.   The Fund  may invest a  portion of  its assets  in
convertible  securities.  A convertible  security  is a  bond,  debenture, note,
preferred stock or other security that may be converted into or exchanged for  a
prescribed  amount of common  stock of the  same or a  different issuer within a
particular  period  of  time  at  a  specified  price  or  formula.  Convertible
securities  rank senior  to common stocks  in a  corporation's capital structure
and, therefore, entail less risk than the corporation's common stock. The  value
of  a convertible security is a function of its "investment value" (its value as
if it did  not have  a conversion privilege),  and its  "conversion value"  (the
security's  worth if  it were  to be exchanged  for the  underlying security, at
market value, pursuant to its conversion privilege).
 
    To the extent that a convertible security's investment value is greater than
its conversion  value,  its  price  will  be  primarily  a  reflection  of  such
investment  value and its price  will be likely to  increase when interest rates
fall and decrease when interest rates rise, as with a fixed-income security (the
credit standing of the issuer and other  factors may also have an effect on  the
convertible  security's value). If  the conversion value  exceeds the investment
value, the price  of the  convertible security  will rise  above its  investment
value  and, in addition,  will sell at  some premium over  its conversion value.
(This premium  represents  the  price  investors are  willing  to  pay  for  the
privilege  of purchasing a  fixed-income security with  a possibility of capital
appreciation due to the  conversion privilege.) At such  times the price of  the
convertible  security  will tend  to fluctuate  directly with  the price  of the
underlying equity security.
 
    Because of the special nature of  the Fund's permitted investments in  lower
rated  convertible  securities,  the  Investment Manager  must  take  account of
certain special  considerations  in assessing  the  risks associated  with  such
investments.  The prices of  lower rated securities  have been found  to be less
sensitive to changes in prevailing interest rates than higher rated investments,
but are likely to  be more sensitive to  adverse economic changes or  individual
corporate  developments. During  an economic  downturn or  substantial period of
rising interest rates, highly leveraged issuers may experience financial  stress
which  would  adversely  affect their  ability  to service  their  principal and
interest payment  obligations, to  meet  their projected  business goals  or  to
obtain additional financing. If the issuer of a lower rated convertible security
owned  by the  Fund defaults,  the Fund  may incur  additional expenses  to seek
recovery. In  addition,  periods  of  economic uncertainty  and  change  can  be
expected  to result in an  increased volatility of market  prices of lower rated
securities and a corresponding volatility in the  net asset value of a share  of
the Fund.
 
    REPURCHASE  AGREEMENTS.   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. In addition,  the value of the collateral  underlying
the  repurchase  agreement  will be  at  least  equal to  the  repurchase price,
including any accrued interest earned on the repurchase agreement. In the  event
of  a default or  bankruptcy by a  selling financial institution,  the Fund will
seek to liquidate such collateral. However,  the exercising of the Fund's  right
to  liquidate such collateral could involve certain  costs or delays and, to the
extent that  proceeds  from  any  sale  upon a  default  of  the  obligation  to
repurchase were less than the repurchase price, the Fund could suffer a loss. 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
 
                                       9
<PAGE>
assets held by the Fund, amounts to more than 15% of its net assets.
 
    PRIVATE PLACEMENTS.  The  Fund may invest  up to 5% of  its total assets  in
securities  which are  subject to restrictions  on resale because  they have not
been registered under the  Securities Act of 1933,  as amended (the  "Securities
Act"),  or which are otherwise not  readily marketable. (Securities eligible for
resale pursuant to  Rule 144A  under the Securities  Act, and  determined to  be
liquid  pursuant to the procedures discussed 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 10% of the  Fund's net 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 securities.
 
    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
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.
 
    INVESTMENT  IN REAL  ESTATE INVESTMENT TRUSTS.  The Fund may  invest in real
estate investment trusts, which pool investors' funds for investments  primarily
in  commercial  real estate  properties.  Investment in  real  estate investment
trusts may be the most practical available  means for the Fund to invest in  the
real  estate  industry (the  Fund is  prohibited from  investing in  real estate
directly). As a shareholder  in a real estate  investment trust, the Fund  would
bear its ratable share of the real estate investment trust's expenses, including
its  advisory and administration fees. At the  same time the Fund would continue
to pay its  own investment management  fees and  other expenses as  a result  of
which the Fund and its stockholders in effect will be absorbing duplicate levels
of fees with respect to investments in real estate investment trusts.
 
    For  additional risk disclosure,  please refer to  the "Investment Objective
and Policies"  section  of  the  Prospectus and  to  the  "Investment  Practices
 
                                       10
<PAGE>
and Policies" section of the Statement of Additional Information.
 
PORTFOLIO MANAGEMENT
 
    The  Fund's portfolio is  actively managed by its  Investment Manager with a
view  to  achieving  the  Fund's  investment  objective.  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") and  other brokers  and dealers  that are  affiliates  of
InterCapital,  and  others  regarding economic  developments  and  interest rate
trends, and the Investment Manager's own analysis of factors it deems  relevant.
The  Fund's portfolio is managed within  InterCapital's Growth and Income Group,
which manages  22 equity  funds  and fund  portfolios with  approximately  $27.4
billion  in assets as of June 30, 1997.  Paul D. Vance, Senior Vice President of
InterCapital and a member  of InterCapital's Growth and  Income Group, has  been
the  primary portfolio manager  of the Fund  since its inception  and has been a
portfolio manager at InterCapital for over five years.
 
    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.  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 and other brokers and dealers
that are affiliates of the Investment Manager.
 
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.
 
    Notwithstanding  any other  investment policy  or restriction,  the Fund may
seek to achieve its investment objective  by investing all or substantially  all
of  its  assets  in another  investment  company having  substantially  the same
investment objective and policies as the Fund.
 
                                       11
<PAGE>
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
GENERAL
 
    The Fund  offers each  class of  its  shares for  sale to  the public  on  a
continuous basis. Pursuant to a Distribution Agreement between the Fund and Dean
Witter  Distributors Inc.  (the "Distributor"),  an affiliate  of the Investment
Manager, shares of the  Fund are distributed by  the Distributor and offered  by
DWR  and  others  who have  entered  into  selected dealer  agreements  with the
Distributor ("Selected Broker-Dealers"). The  principal executive office of  the
Distributor is located at Two World Trade Center, New York, New York 10048.
    The Fund offers four classes of shares (each, a "Class"). Class A shares are
sold  to investors with an initial sales charge that declines to zero for larger
purchases; however, Class  A shares  sold without  an initial  sales charge  are
subject  to  a contingent  deferred sales  charge ("CDSC")  of 1.0%  if redeemed
within one year of purchase, except for certain specific circumstances. Class  B
shares  are  sold without  an initial  sales charge  but are  subject to  a CDSC
(scaled down from 5.0% to 1.0%)  payable upon most redemptions within six  years
after    purchase.   (Class   B   shares    purchased   by   certain   qualified
employer-sponsored benefit plans are subject to a CDSC scaled down from 2.0%  to
1.0%  if redeemed within  three years after  purchase.) Class C  shares are sold
without an  initial sales  charge but  are subject  to a  CDSC of  1.0% on  most
redemptions made within one year after purchase. Class D shares are sold without
an  initial sales charge or CDSC and  are available only to investors meeting an
initial  investment  minimum  of  $5  million,  and  to  certain  other  limited
categories  of investors.  At the  discretion of the  Board of  Directors of the
Fund, Class A shares may be sold to categories of investors in addition to those
set forth  in this  prospectus at  net  asset value  without a  front-end  sales
charge, and Class D shares may be sold to certain other categories of investors,
in each case as may be described in the then current prospectus of the Fund. See
"Alternative  Purchase  Arrangements--  Selecting  a  Particular  Class"  for  a
discussion of  factors  to  consider  in selecting  which  Class  of  shares  to
purchase.
 
    The  minimum initial purchase  is $1,000 for each  Class of shares, although
Class D shares are only available to persons investing $5 million or more and to
certain other limited categories  of investors. For the  purpose of meeting  the
minimum  $5 million initial  investment for Class  D shares, and  subject to the
$1,000 minimum initial  investment for  each Class  of the  Fund, an  investor's
existing holdings of Class A shares of the Fund and other Dean Witter Funds that
are  multiple class funds  ("Dean Witter Multi-Class Funds")  and shares of Dean
Witter Funds sold  with a front-end  sales charge ("FSC  Funds") and  concurrent
investments  in Class  D shares  of the Fund  and other  Dean Witter Multi-Class
Funds will be aggregated. Subsequent  purchases of $100 or  more may be made  by
sending  a  check,  payable  to Dean  Witter  Dividend  Growth  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.  When  purchasing shares  of  the Fund,  investors  must
specify whether the purchase is for Class A, Class B, Class C or Class D shares.
If  no Class is specified,  the Transfer Agent will  not process the transaction
until the proper Class is identified.  The minimum initial purchase in the  case
of   investments  through  EasyInvest-SM-,  an   automatic  purchase  plan  (see
"Shareholder Services"),  is  $100,  provided that  the  schedule  of  automatic
investments  will result in investments totalling $1,000 within the first twelve
months. In  the case  of investments  pursuant to  Systematic Payroll  Deduction
Plans  (including Individual Retirement Plans), the Fund, in its discretion, may
accept investments without regard to  any minimum amounts which would  otherwise
be  required, if the Fund has reason to believe that additional investments will
increase the investment  in all accounts  under such Plans  to at least  $1,000.
Certificates for shares purchased will not be issued
 
                                       12
<PAGE>
unless requested by the shareholder in writing to the Transfer Agent.
 
    Shares  of  the Fund  are sold  through  the Distributor  on a  normal three
business day settlement basis; that is, payment is due on the third business day
(settlement date) after the order is placed with the Distributor. Since DWR  and
other  Selected Broker-Dealers forward investors' funds on settlement date, they
will benefit  from the  temporary use  of the  funds if  payment is  made  prior
thereto.  As noted above, orders placed directly with the Transfer Agent must be
accompanied by payment. Investors will  be entitled to receive income  dividends
and  capital gains  distributions if  their order  is received  by the  close of
business  on  the  day  prior  to  the  record  date  for  such  dividends   and
distributions.  Sales personnel of a  Selected Broker-Dealer are compensated for
selling shares of the Trust by the  Distributor or any of its affiliates  and/or
the  Selected Broker-Dealer. In  addition, some sales  personnel of the Selected
Broker-Dealer will receive  various types  of non-cash  compensation as  special
sales  incentives,  including trips,  educational  and/or business  seminars and
merchandise. The  Fund and  the  Distributor reserve  the  right to  reject  any
purchase orders.
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
    The  Fund offers several Classes of  shares to investors designed to provide
them with the flexibility of selecting an investment best suited to their needs.
The general public is offered three Classes  of shares: Class A shares, Class  B
shares  and Class C shares,  which differ principally in  terms of sales charges
and rate of expenses to which they are subject. A fourth Class of shares,  Class
D  shares, is  offered only  to limited  categories of  investors (see  "No Load
Alternative--Class D Shares" below).
 
    Each Class A, Class B,  Class C or Class D  share of the Fund represents  an
identical  interest in the investment portfolio of the Fund except that Class A,
Class B and Class C shares bear the expenses of the ongoing shareholder  service
fees,  Class B and Class C shares  bear the expenses of the ongoing distribution
fees and Class A,  Class B and Class  C shares which are  redeemed subject to  a
CDSC bear the expense of the additional incremental distribution costs resulting
from  the CDSC applicable  to shares of those  Classes. The ongoing distribution
fees that are imposed  on Class A, Class  B and Class C  shares will be  imposed
directly  against those  Classes and  not against  all assets  of the  Fund and,
accordingly, such charges against one Class will not affect the net asset  value
of any other Class or have any impact on investors choosing another sales charge
option. See "Plan of Distribution" and "Redemptions and Repurchases."
 
    Set  forth below is a summary of the differences between the Classes and the
factors an  investor should  consider when  selecting a  particular Class.  This
summary  is qualified in its entirety by  detailed discussion of each Class that
follows this summary.
 
    CLASS A SHARES.  Class A shares are sold at net asset value plus an  initial
sales  charge of up  to 5.25%. The  initial sales charge  is reduced for certain
purchases. Investments of $1 million or  more (and investments by certain  other
limited  categories of investors)  are not subject  to any sales  charges at the
time of purchase but are  subject to a CDSC of  1.0% on redemptions made  within
one  year after  purchase, except  for certain  specific circumstances.  Class A
shares are also subject to a 12b-1 fee  of up to 0.25% of the average daily  net
assets of the Class. See "Initial Sales Charge Alternative--Class A Shares."
 
    CLASS  B SHARES.   Class  B shares are  offered at  net asset  value with no
initial sales charge but are subject to  a CDSC (scaled down from 5.0% to  1.0%)
if  redeemed within six years of purchase.  (Class B shares purchased by certain
qualified employer-sponsored benefit  plans are  subject to a  CDSC scaled  down
from  2.0% to 1.0% if redeemed within three years after purchase.) This CDSC may
be waived for certain redemptions. Class B shares are also subject to an  annual
12b-1  fee of 1.0% of the lesser of: (a) the average daily aggregate gross sales
of the Fund's Class B  shares since the inception of  the 12b-1 Plan on July  2,
1984 (not including
 
                                       13
<PAGE>
reinvestments  of dividends  or capital  gains distributions),  less the average
daily aggregate net asset value of the Fund's Class B shares redeemed since  the
inception of the 12b-1 Plan upon which a CDSC has been imposed or waived, or (b)
the  average daily net assets  of Class B attributable  to shares issued, net of
related shares redeemed, since inception of the 12b-1 Plan. The Class B  shares'
distribution  fee will cause  that Class to  have higher expenses  and pay lower
dividends than Class A or Class D shares.
 
    After  approximately  ten   (10)  years,   Class  B   shares  will   convert
automatically  to Class A  shares of the  Fund, based on  the relative net asset
values of the shares of the two  Classes on the conversion date. In addition,  a
certain  portion  of  Class  B  shares  that  have  been  acquired  through  the
reinvestment of dividends and distributions will be converted at that time.  See
"Contingent Deferred Sales Charge Alternative--Class B Shares."
 
    CLASS  C SHARES.  Class C shares are sold at net asset value with no initial
sales charge but are subject  to a CDSC of 1.0%  on redemptions made within  one
year  after purchase. This CDSC may be  waived for certain redemptions. They are
subject to an annual 12b-1 fee of up to 1.0% of the average daily net assets  of
the Class C shares. The Class C shares' distribution fee may cause that Class to
have higher expenses and pay lower dividends than Class A or Class D shares. See
"Level Load Alternative--Class C Shares."
 
    CLASS  D SHARES.  Class D shares are available only to limited categories of
investors (see "No Load Alternative--Class D Shares" below). Class D shares  are
sold  at net  asset value  with no initial  sales charge  or CDSC.  They are not
subject to any 12b-1 fees. See "No Load Alternative--Class D Shares."
 
    SELECTING A PARTICULAR  CLASS.  In  deciding which Class  of Fund shares  to
purchase,  investors should consider the following factors, as well as any other
relevant facts and circumstances:
 
    The decision as to which Class of  shares is more beneficial to an  investor
depends  on the amount and  intended length of his  or her investment. Investors
who prefer an  initial sales charge  alternative may elect  to purchase Class  A
shares.  Investors  qualifying  for significantly  reduced  or, in  the  case of
purchases of $1  million or  more, no  initial sales  charges may  find Class  A
shares  particularly attractive because similar  sales charge reductions are not
available with respect to Class  B or Class C  shares. Moreover, Class A  shares
are  subject to lower ongoing  expenses than are Class B  or Class C shares over
the term of the investment.  As an alternative, Class B  and Class C shares  are
sold  without  any  initial  sales  charge  so  the  entire  purchase  price  is
immediately invested  in the  Fund. Any  investment return  on these  additional
investment  amounts may partially or wholly offset the higher annual expenses of
these Classes. Because the  Fund's future return  cannot be predicted,  however,
there can be no assurance that this would be the case.
 
    Finally,  investors should  consider the effect  of the CDSC  period and any
conversion rights of  the Classes in  the context of  their own investment  time
frame. For example, although Class C shares are subject to a significantly lower
CDSC  upon redemptions, they do not, unlike Class B shares, convert into Class A
shares after approximately ten years, and, therefore, are subject to an  ongoing
12b-1  fee of 1.0% (rather than the 0.25%  fee applicable to Class A shares) for
an indefinite period of time. Thus, Class  B shares may be more attractive  than
Class  C  shares  to  investors  with  longer  term  investment  outlooks. Other
investors, however, may elect to purchase  Class C shares if, for example,  they
determine  that they do not  wish to be subject to  a front-end sales charge and
they are uncertain as to the length of time they intend to hold their shares.
 
    For the purpose  of meeting  the $5  million minimum  investment amount  for
Class D shares, holdings of Class A shares in all Dean Witter Multi-Class Funds,
shares  of FSC Funds and shares of Dean  Witter Funds for which such shares have
been
 
                                       14
<PAGE>
exchanged will be included together with the current investment amount.
 
    Sales personnel may receive different compensation for selling each Class of
shares. Investors should understand that  the purpose of a  CDSC is the same  as
that  of the initial sales  charge in that the  sales charges applicable to each
Class provide for the financing of the distribution of shares of that Class.
 
    Set forth  below is  a chart  comparing  the sales  charge, 12b-1  fees  and
conversion options applicable to each Class of shares:
 
<TABLE>
<CAPTION>
<C>        <S>              <C>         <C>
                                         CONVERSION
  CLASS     SALES CHARGE    12B-1 FEE      FEATURE
    A      Maximum 5.25%        0.25%        No
           initial sales
           charge reduced
           for purchases
           of $25,000 and
           over; shares
           sold without an
           initial sales
           charge
           generally
           subject to a
           1.0% CDSC
           during first
           year.
    B      Maximum 5.0%         1.0%    B shares
           CDSC during the              convert to A
           first year                   shares
           decreasing to 0              automatically
           after six years              after
                                        approximately
                                        ten years
    C      1.0% CDSC            1.0%         No
           during first
           year
    D           None           None          No
</TABLE>
 
    See  "Purchase  of Fund  Shares" and  "The  Fund and  its Management"  for a
complete description of the sales charges and service and distribution fees  for
each  Class  of  shares  and "Determination  of  Net  Asset  Value," "Dividends,
Distributions and  Taxes"  and "Shareholder  Services--Exchange  Privilege"  for
other differences between the Classes of shares.
 
INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES
 
    Class  A shares are sold at net asset value plus an initial sales charge. In
some cases,  reduced  sales  charges  may  be  available,  as  described  below.
Investments  of $1  million or  more (and  investments by  certain other limited
categories of investors) are  not subject to  any sales charges  at the time  of
purchase  but are subject to a CDSC of  1.0% on redemptions made within one year
after purchase (calculated from the  last day of the  month in which the  shares
were  purchased), except  for certain specific  circumstances. The  CDSC will be
assessed on an amount  equal to the  lesser of the current  market value or  the
cost  of the  shares being  redeemed. The CDSC  will not  be imposed  (i) in the
circumstances set forth below in  the section "Contingent Deferred Sales  Charge
Alternative--Class  B Shares--CDSC Waivers,"  except that the  references to six
years in the first paragraph of that section shall mean one year in the case  of
Class  A  shares,  and  (ii)  in the  circumstances  identified  in  the section
"Additional Net Asset  Value Purchase Options"  below. Class A  shares are  also
subject to an annual 12b-1 fee of up to 0.25% of the average daily net assets of
the Class.
 
    The  offering price of Class A shares will  be the net asset value per share
next determined following receipt of an  order (see "Determination of Net  Asset
Value"  below), plus a sales  charge (expressed as a  percentage of the offering
price) on a single transaction as shown in the following table:
 
<TABLE>
<CAPTION>
                                          SALES CHARGE
                           ------------------------------------------
                              PERCENTAGE OF          APPROXIMATE
    AMOUNT OF SINGLE         PUBLIC OFFERING    PERCENTAGE OF AMOUNT
       TRANSACTION                PRICE               INVESTED
- -------------------------  -------------------  ---------------------
<S>                        <C>                  <C>
Less than $25,000........           5.25%                 5.54%
$25,000 but less
     than $50,000........           4.75%                 4.99%
$50,000 but less
     than $100,000.......           4.00%                 4.17%
$100,000 but less
     than $250,000.......           3.00%                 3.09%
$250,000 but less
     than $1 million.....           2.00%                 2.04%
$1 million and over......              0                     0
</TABLE>
 
                                       15
<PAGE>
    Upon notice to all Selected  Broker-Dealers, the Distributor may reallow  up
to  the  full applicable  sales charge  as  shown in  the above  schedule during
periods specified in such notice. During periods  when 90% or more of the  sales
charge   is  reallowed,  such  Selected  Broker-Dealers  may  be  deemed  to  be
underwriters as that term is defined in the Securities Act of 1933.
 
    The above schedule of sales charges  is applicable to purchases in a  single
transaction  by, among others: (a) an individual;  (b) an individual, his or her
spouse and their children under the age of 21 purchasing shares for his, her  or
their  own accounts; (c)  a trustee or  other fiduciary purchasing  shares for a
single trust estate or a single fiduciary account; (d) a pension, profit-sharing
or other employee benefit plan qualified  or non-qualified under Section 401  of
the  Internal Revenue Code;  (e) tax-exempt organizations  enumerated in Section
501(c)(3) or  (13) of  the Internal  Revenue Code;  (f) employee  benefit  plans
qualified under Section 401 of the Internal Revenue Code of a single employer or
of  employers who are "affiliated  persons" of each other  within the meaning of
Section 2(a)(3)(c)  of the  Act; and  for investments  in Individual  Retirement
Accounts  of employees of a single employer through Systematic Payroll Deduction
plans; or (g) any other organized group of persons, whether incorporated or not,
provided the organization has been in existence for at least six months and  has
some  purpose other than  the purchase of redeemable  securities of a registered
investment company at a discount.
 
    COMBINED PURCHASE  PRIVILEGE.   Investors may  have the  benefit of  reduced
sales  charges in accordance  with the above schedule  by combining purchases of
Class A shares of the Fund in  single transactions with the purchase of Class  A
shares of other Dean Witter Multi-Class Funds and shares of FSC Funds. The sales
charge  payable on the purchase of  the Class A shares of  the Fund, the Class A
shares of the  other Dean Witter  Multi-Class Funds  and the shares  of the  FSC
Funds  will be at their  respective rates applicable to  the total amount of the
combined concurrent purchases of such shares.
 
    RIGHT OF ACCUMULATION.   The above persons and  entities may benefit from  a
reduction  of the  sales charges  in accordance with  the above  schedule if the
cumulative net asset value of Class A shares purchased in a single  transaction,
together  with  shares  of  the  Fund and  other  Dean  Witter  Funds previously
purchased at a price including a front-end sales charge (including shares of the
Fund and other  Dean Witter  Funds acquired in  exchange for  those shares,  and
including  in each  case shares acquired  through reinvestment  of dividends and
distributions), which  are held  at the  time of  such transaction,  amounts  to
$25,000  or more. If such investor has a cumulative net asset value of shares of
FSC Funds and  Class A and  Class D shares  equal to at  least $5 million,  such
investor  is eligible to purchase  Class D shares subject  to the $1,000 minimum
initial investment  requirement  of  that  Class  of  the  Fund.  See  "No  Load
Alternative-- Class D Shares" below.
 
    The  Distributor must be notified by DWR  or a Selected Broker-Dealer or the
shareholder at the time a purchase  order is placed that the purchase  qualifies
for  the reduced  charge under the  Right of  Accumulation. Similar notification
must be made  in writing  by the  dealer or shareholder  when such  an order  is
placed  by  mail. The  reduced sales  charge will  not be  granted if:  (a) such
notification is not furnished at the time of  the order; or (b) a review of  the
records of the Selected Broker-Dealer or the Transfer Agent fails to confirm the
investor's represented holdings.
 
    LETTER OF INTENT.  The foregoing schedule of reduced sales charges will also
be  available to investors who  enter into a written  Letter of Intent providing
for the purchase, within a thirteen-month period, of Class A shares of the  Fund
from  DWR or other  Selected Broker-Dealers. The  cost of Class  A shares of the
Fund or shares of other Dean Witter  Funds which were previously purchased at  a
price including a front-end sales charge during the
 
                                       16
<PAGE>
90-day  period prior to the date of receipt  by the Distributor of the Letter of
Intent, or of Class A  shares of the Fund or  shares of other Dean Witter  Funds
acquired  in exchange for shares of such funds purchased during such period at a
price including  a  front-end  sales  charge,  which  are  still  owned  by  the
shareholder, may also be included in determining the applicable reduction.
 
    ADDITIONAL  NET ASSET VALUE PURCHASE OPTIONS.  In addition to investments of
$1 million or more, Class A shares also  may be purchased at net asset value  by
the following:
 
   (1)  trusts for which Dean Witter Trust Company ("DWTC") or Dean Witter Trust
FSB ("DWTFSB")  (each  of which  is  an  affiliate of  the  Investment  Manager)
provides discretionary trustee services;
 
   (2) persons participating in a fee-based program approved by the Distributor,
pursuant to which such persons pay an asset based fee for services in the nature
of  investment advisory or administrative services (such investments are subject
to all  of  the  terms  and  conditions of  such  programs,  which  may  include
termination fees and restrictions on transferability of Fund shares);
 
   (3)  retirement plans qualified under Section  401(k) of the Internal Revenue
Code ("401(k) plans") and other employer-sponsored plans qualified under Section
401(a) of the Internal Revenue Code with at least 200 eligible employees and for
which DWTC or DWTFSB serves as Trustee  or the 401(k) Support Services Group  of
DWR serves as recordkeeper;
 
   (4)  401(k) plans and other  employer-sponsored plans qualified under Section
401(a) of the Internal Revenue Code for  which DWTC or DWTFSB serves as  Trustee
or the 401(k) Support Services Group of DWR serves as recordkeeper whose Class B
shares  have converted to Class A shares, regardless of the plan's asset size or
number of eligible employees;
 
   (5) investors who are clients of  a Dean Witter account executive who  joined
Dean  Witter from another investment firm within six months prior to the date of
purchase of Fund  shares by such  investors, if the  shares are being  purchased
with  the proceeds from a redemption of shares of an open-end proprietary mutual
fund of the account executive's previous  firm which imposed either a  front-end
or  deferred sales  charge, provided  such purchase  was made  within sixty days
after the redemption and the proceeds  of the redemption had been maintained  in
the interim in cash or a money market fund; and
 
   (6)  other  categories  of investors,  at  the  discretion of  the  Board, as
disclosed in the then current prospectus of the Fund.
 
    No CDSC  will be  imposed on  redemptions of  shares purchased  pursuant  to
paragraphs (1), (2) or (5), above.
 
    For  further information concerning purchases  of the Fund's shares, contact
DWR or another  Selected Broker-Dealer  or consult the  Statement of  Additional
Information.
 
CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE-- CLASS B SHARES
 
    Class  B  shares are  sold at  net  asset value  next determined  without an
initial sales charge so that the  full amount of an investor's purchase  payment
may  be immediately invested  in the Fund.  A CDSC, however,  will be imposed on
most Class B shares redeemed within six  years after purchase. The CDSC will  be
imposed  on  any redemption  of shares  if after  such redemption  the aggregate
current value of  a Class  B account  with the  Fund falls  below the  aggregate
amount  of the investor's purchase  payments for Class B  shares made during the
six years (or, in the case of shares held by certain employer-sponsored  benefit
plans,  three years) preceding  the redemption. In addition,  Class B shares are
subject to an annual 12b-1 fee of 1.0%  of the lesser of: (a) the average  daily
aggregate  gross sales of the  Fund's Class B shares  since the inception of the
Fund's 12b-1 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 Class B  shares redeemed since the  Plan's inception upon which  a
CDSC has been
 
                                       17
<PAGE>
imposed  or waived, or (b) the average  daily net assets of Class B attributable
to Class B shares issued, net of related shares redeemed, since inception of the
Plan.
    Except as noted below,  Class B shares  of the Fund which  are held for  six
years or more after purchase (calculated from the last day of the month in which
the  shares were  purchased) will  not be subject  to any  CDSC upon redemption.
Shares redeemed earlier than six years  after purchase may, however, be  subject
to a CDSC which will be a percentage of the dollar amount of shares redeemed and
will be assessed on an amount equal to the lesser of the current market value or
the  cost of the shares being redeemed.  The size of this percentage will depend
upon how long the shares have been held, as set forth in the following table:
 
<TABLE>
<CAPTION>
           YEAR SINCE                     CDSC AS A
            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>
 
    In the case of  Class B shares of  the Fund held by  401 (k) plans or  other
employer-sponsored  plans qualified under Section 401(a) of the Internal Revenue
Code for which DWTC or DWTFSB serves  as Trustee or the 401(k) Support  Services
Group  of DWR serves as  recordkeeper and whose accounts  are opened on or after
July 28, 1997, shares held for three years or more after purchase (calculated as
described in  the  paragraph  above)  will  not be  subject  to  any  CDSC  upon
redemption. However, shares redeemed earlier than three years after purchase may
be  subject to  a CDSC  (calculated as  described in  the paragraph  above), the
percentage of which will depend  on how long the shares  have been held, as  set
forth in the following table:
 
<TABLE>
<CAPTION>
           YEAR SINCE
            PURCHASE               CDSC AS A PERCENTAGE OF
          PAYMENT MADE                 AMOUNT REDEEMED
- ---------------------------------  -----------------------
<S>                                <C>
First............................              2.0%
Second...........................              2.0%
Third............................              1.0%
Fourth and thereafter............              None
</TABLE>
 
    CDSC  WAIVERS.    A  CDSC will  not  be  imposed on:  (i)  any  amount which
represents an increase in value of shares purchased within the six years (or, in
the case  of shares  held  by certain  employer-sponsored benefit  plans,  three
years)  preceding the  redemption; (ii)  the current  net asset  value of shares
purchased more  than six  years  (or, in  the case  of  shares held  by  certain
employer-sponsored  benefit  plans, three  years) prior  to the  redemption; and
(iii) the current net  asset value of shares  purchased through reinvestment  of
dividends  or distributions and/or shares acquired in exchange for shares of FSC
Funds or  of other  Dean Witter  Funds  acquired in  exchange for  such  shares.
Moreover,  in determining whether a  CDSC is applicable it  will be assumed that
amounts described in  (i), (ii)  and (iii) above  (in that  order) are  redeemed
first.  In addition, no CDSC will be  imposed on redemptions of shares which are
attributable to reinvestment of dividends or distributions from, or the proceeds
of, certain Unit Investment Trusts.
 
    In addition, the CDSC, if otherwise  applicable, will be waived in the  case
of:
 
   (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
 
                                       18
<PAGE>
requested within one year of the death or initial determination of disability;
 
   (2)   redemptions   in  connection   with   the  following   retirement  plan
distributions:  (A) lump-sum or  other distributions from a qualified  corporate
or self-employed retirement plan following retirement (or, in the case of a "key
employee"  of a  "top heavy"  plan, following  attainment of  age 59  1/2);  (B)
distributions from an IRA  or 403(b) Custodial  Account following attainment  of
age 59 1/2; or  (C) a tax-free return of an excess contribution to an IRA; and
 
   (3)  all redemptions  of shares held  for the  benefit of a  participant in a
401(k) plan or other employer-sponsored  plan qualified under Section 401(a)  of
the  Internal  Revenue Code  which offers  investment  companies managed  by the
Investment Manager  or its  subsidiary, Dean  Witter Services  Company Inc.,  as
self-directed  investment alternatives  and for which  DWTC or  DWTFSB serves as
Trustee or  the 401(k)  Support Services  Group of  DWR serves  as  recordkeeper
("Eligible  Plan"),  provided that  either:   (A)  the plan  continues to  be an
Eligible Plan after the redemption; or  (B) the redemption is in connection with
the complete termination  of the  plan involving  the distribution  of all  plan
assets to participants.
 
    With  reference to (1) above, for the purpose of determining disability, the
Distributor utilizes the definition of disability contained in Section  72(m)(7)
of  the  Internal Revenue  Code, which  relates  to the  inability to  engage in
gainful employment. With reference  to (2) above,  the term "distribution"  does
not  encompass a direct transfer of  IRA, 403(b) Custodial Account or retirement
plan assets to  a successor custodian  or trustee. All  waivers will be  granted
only  following receipt by the Distributor  of confirmation of the shareholder's
entitlement.
 
    CONVERSION TO CLASS A SHARES.  All shares of the Fund held prior to July 28,
1997 (other than shares which  were purchased prior to  July 2, 1984 (and,  with
respect  to such  shares, including such  proportion of  shares acquired through
reinvestment of dividends and capital gains distributions as the total number of
shares acquired prior  to such date  bears to  the total number  of Fund  shares
purchased  and  owned by  a shareholder  (collectively,  the "Old  Shares")) and
shares held  by  certain employee  benefit  plans  established by  DWR  and  its
affiliate,  SPS Transaction Services, Inc.) have been designated Class B shares.
Shares held before May  1, 1997 that  have been designated  Class B shares  will
convert  to Class A shares  in May, 2007. In all  other instances Class B shares
will convert automatically to  Class A shares, based  on the relative net  asset
values  of the shares of  the two Classes on the  conversion date, which will be
approximately ten (10) years  after the date of  the original purchase. The  ten
year  period is calculated  from the last day  of the month  in which the shares
were purchased or, in the case of Class B shares acquired through an exchange or
a series of  exchanges, from the  last day of  the month in  which the  original
Class  B shares were purchased, provided that shares originally purchased before
May 1, 1997  will convert  to Class  A shares in  May, 2007.  The conversion  of
shares  purchased on or after May 1, 1997 will take place in the month following
the tenth anniversary of the purchase. There will also be converted at that time
such proportion of  Class B  shares acquired through  automatic reinvestment  of
dividends  and distributions owned by the shareholder as the total number of his
or her  Class B  shares converting  at the  time bears  to the  total number  of
outstanding  Class B shares purchased and owned  by the shareholder. In the case
of Class  B  shares held  by  a 401(k)  plan  or other  employer-sponsored  plan
qualified  under Section 401(a) of the Internal  Revenue Code and for which DWTC
or DWTFSB serves as Trustee or the  401(k) Support Services Group of DWR  serves
as recordkeeper, the plan is treated as a single investor and all Class B shares
will  convert to Class A shares on the  conversion date of the first shares of a
Dean Witter Multi-Class  Fund purchased by  that plan.  In the case  of Class  B
shares  previously exchanged for shares of  an "Exchange Fund" (see "Shareholder
Services--Exchange Privilege"), the period of time  the shares were held in  the
Exchange  Fund (calculated from the last day  of the month in which the Exchange
Fund shares were acquired) is excluded
 
                                       19
<PAGE>
from the  holding  period  for  conversion. If  those  shares  are  subsequently
re-exchanged  for Class B shares of a  Dean Witter Multi-Class Fund, the holding
period resumes  on the  last  day of  the  month in  which  Class B  shares  are
reacquired.
 
    If  a shareholder has  received share certificates for  Class B shares, such
certificates must be delivered to the Transfer Agent at least one week prior  to
the date for conversion. Class B shares evidenced by share certificates that are
not  received by the  Transfer Agent at  least one week  prior to any conversion
date will be converted into Class A shares on the next scheduled conversion date
after such certificates are received.
 
    Effectiveness of  the  conversion  feature  is  subject  to  the  continuing
availability  of  a ruling  of the  Internal  Revenue Service  or an  opinion of
counsel that (i) the  conversion of shares does  not constitute a taxable  event
under the Internal Revenue Code, (ii) Class A shares received on conversion will
have  a basis equal to  the shareholder's basis in  the converted Class B shares
immediately prior  to the  conversion,  and (iii)  Class  A shares  received  on
conversion  will have a holding  period that includes the  holding period of the
converted Class B shares. The conversion feature may be suspended if the  ruling
or  opinion is no longer available. In such event, Class B shares would continue
to be subject to Class B 12b-1 fees.
 
    Class B shares purchased before  July 28, 1997 by  trusts for which DWTC  or
DWTFSB provides discretionary trustee services will convert to Class A shares on
or about August 29, 1997. The CDSC will not be applicable to such shares.
 
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class  C  shares are  sold at  net  asset value  next determined  without an
initial sales charge but are subject to a CDSC of 1.0% on most redemptions  made
within  one year after  purchase (calculated from  the last day  of the month in
which the shares were purchased). The CDSC  will be assessed on an amount  equal
to  the lesser  of the  current market  value or  the cost  of the  shares being
redeemed. The CDSC will not be imposed  in the circumstances set forth above  in
the  section "Contingent Deferred Sales Charge Alternative--Class B Shares--CDSC
Waivers," except that the references to six years in the first paragraph of that
section shall mean one year  in the case of Class  C shares. Class C shares  are
subject  to an annual 12b-1 fee of up to 1.0% of the average daily net assets of
the Class. Unlike Class B shares, Class C shares have no conversion feature and,
accordingly, an investor that purchases Class C shares will be subject to  12b-1
fees  applicable to Class  C shares for  an indefinite period  subject to annual
approval by the Fund's Board of Directors and regulatory limitations.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
    Class D  shares  are  offered  without  any  sales  charge  on  purchase  or
redemption  and  without any  12b-1  fee. Class  D  shares are  offered  only to
investors meeting an initial investment minimum of $5 million and the  following
categories  of investors: (i) investors participating in the InterCapital mutual
fund asset allocation program pursuant to which such persons pay an asset  based
fee;  (ii)  persons  participating  in  a  fee-based  program  approved  by  the
Distributor, pursuant to which such persons pay an asset based fee for  services
in  the nature of investment advisory or administrative services (subject to all
of the terms and conditions of such programs, which may include termination fees
and  restrictions  on  transferability  of  Fund  shares);  (iii)  401(k)  plans
established  by DWR and SPS Transaction Services, Inc. (an affiliate of DWR) for
their employees;  (iv) certain  Unit  Investment Trusts  sponsored by  DWR;  (v)
certain  other open-end investment companies whose shares are distributed by the
Distributor; and (vi) other  categories of investors, at  the discretion of  the
Board,  as disclosed in the then current  prospectus of the Fund. The Old Shares
and shares held by the employee benefit plans referred to in clause (iii)  above
prior  to  July 28,  1997 have  been  designated Class  D shares.  Investors who
require a $5 million minimum initial  investment to qualify to purchase Class  D
shares  may  satisfy  that requirement  by  investing  that amount  in  a single
transaction   in   Class    D   shares    of   the   Fund    and   other    Dean
 
                                       20
<PAGE>
Witter  Multi-Class  Funds, subject  to  the $1,000  minimum  initial investment
required for that Class of the Fund. In addition, for the purpose of meeting the
$5 million minimum  investment amount, holdings  of Class A  shares in all  Dean
Witter  Multi-Class Funds, shares of  FSC Funds and shares  of Dean Witter Funds
for which such  shares have been  exchanged will be  included together with  the
current investment amount. If a shareholder redeems Class A shares and purchases
Class D shares, such redemption may be a taxable event.
 
PLAN OF DISTRIBUTION
 
    The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under the
Act  with respect to the distribution of Class  A, Class B and Class C shares of
the Fund. In the case of Class A and Class C shares, the Plan provides that  the
Fund  will  reimburse the  Distributor and  others for  the expenses  of certain
activities and services incurred by them specifically on behalf of those shares.
Reimbursements for these expenses will be  made in monthly payments by the  Fund
to  the Distributor, which will in no  event exceed amounts equal to payments at
the annual rates of 0.25%  and 1.0% of the average  daily net assets of Class  A
and Class C, respectively. In the case of Class B shares, the Plan provides that
the  Fund  will pay  the  Distributor a  fee, which  is  accrued daily  and paid
monthly, at the  annual rate of  1.0% of the  lesser of: (a)  the average  daily
aggregate  gross sales of the  Fund's Class B shares  since the inception of the
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
Class B shares redeemed since  the Plan's inception upon  which a CDSC has  been
imposed  or waived, or (b) the average  daily net assets of Class B attributable
to Class B shares issued, net of related shares redeemed, since inception of the
Plan. The fee is treated by the Fund as an expense in the year it is accrued. In
the case of Class A shares, the entire amount of the fee currently represents  a
service  fee within the meaning  of the NASD guidelines. In  the case of Class B
and Class C shares, a portion of the fee payable pursuant to the Plan, equal  to
0.25%  of the average  daily net assets  of each of  these Classes, is currently
characterized as a service  fee. A service  fee is a  payment made for  personal
service and/or the maintenance of shareholder accounts.
 
    Additional  amounts paid under the  Plan in the case of  Class B and Class C
shares are paid to the Distributor for services provided and the expenses  borne
by  the  Distributor and  others  in the  distribution  of the  shares  of those
Classes, including the payment of commissions  for sales of the shares of  those
Classes  and incentive compensation to and  expenses of DWR's account executives
and others  who engage  in or  support  distribution of  shares or  who  service
shareholder  accounts, including  overhead and telephone  expenses; printing and
distribution of prospectuses and reports used in connection with the offering of
the Fund's shares to other than current shareholders; and preparation,  printing
and distribution of sales literature and advertising materials. In addition, the
Distributor  may utilize fees paid  pursuant to the Plan in  the case of Class B
shares to compensate DWR and other Selected Broker-Dealers for their opportunity
costs in advancing such amounts,  which compensation would be  in the form of  a
carrying charge on any unreimbursed expenses.
 
    For  the fiscal  year ended February  28, 1997,  Class B shares  of the Fund
accrued payments under the Plan amounting to $81,976,079, which amount is  equal
to  0.74%  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.  All shares held  prior to  July 28, 1997
(other than the  Old Shares and  shares held by  certain employee benefit  plans
established  by DWR and its affiliate, SPS Transaction Services, Inc.) have been
designated Class B shares.
 
    In the  case  of  Class  B  shares, at  any  given  time,  the  expenses  in
distributing Class B shares of the Fund may be in excess of the total of (i) the
payments made by the Fund pursuant to the Plan, and
 
                                       21
<PAGE>
(ii)  the proceeds  of CDSCs paid  by investors  upon the redemption  of Class B
shares. For example, if $1 million in expenses in distributing Class B shares of
the Fund had been incurred  and $750,000 had been  received as described in  (i)
and (ii) above, the excess expense would amount to $250,000. The Distributor has
advised  the  Fund  that  such excess  amounts,  including  the  carrying charge
described above, totalled $221,826,761 at February 28, 1997, which was equal  to
1.72%  of  the  net  assets of  the  Fund  on  such date.  Because  there  is no
requirement  under  the  Plan  that  the  Distributor  be  reimbursed  for   all
distribution expenses or any requirement that the Plan be continued from year to
year,  such excess amount does not constitute  a liability of the Fund. Although
there is no legal obligation for the Fund to pay expenses incurred in excess  of
payments  made to the Distributor under the Plan, and the proceeds of CDSCs paid
by investors upon redemption of shares, if for any reason the Plan is terminated
the 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  CDSCs,  may  or  may  not  be  recovered  through  future
distribution fees or CDSCs.
 
    In the case of Class A and Class C shares, expenses incurred pursuant to the
Plan  in any calendar year in  excess of 0.25% or 1.0%  of the average daily net
assets of Class A or Class C,  respectively, will not be reimbursed by the  Fund
through  payments in  any subsequent year,  except that  expenses representing a
gross sales commission credited to account executives at the time of sale may be
reimbursed in  the subsequent  calendar  year. No  interest or  other  financing
charges  will  be incurred  on  any Class  A  or Class  C  distribution expenses
incurred by the Distributor under the  Plan or on any unreimbursed expenses  due
to the Distributor pursuant to the Plan.
 
DETERMINATION OF NET ASSET VALUE
 
    The  net asset value  per share is  determined once daily  at 4:00 p.m., New
York time (or, on  days when the  New York Stock Exchange  closes prior to  4:00
p.m.,  at such earlier  time), on each day  that the New  York Stock Exchange is
open by  taking  net assets  of  the Fund,  dividing  by the  number  of  shares
outstanding and adjusting to the nearest cent. The assets belonging to the Class
A,  Class B, Class  C and Class D  shares will be invested  together in a single
portfolio. The  net asset  value  of each  Class,  however, will  be  determined
separately by subtracting each Class's accrued expenses and liabilities. The net
asset  value per share will  not be determined on Good  Friday and on such other
federal and non-federal holidays as are observed by the New York Stock Exchange.
 
    In the calculation of  the Fund's net asset  value: (1) an equity  portfolio
security  listed or traded on  the New York or  American Stock Exchange or other
stock exchange is valued  at its latest  sale price on  that exchange; 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   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 (valuation  of debt  securities for  which market  quotations are  not
readily  available may be  based upon current market  prices of securities which
are comparable in coupon, rating and maturity or an appropriate matrix utilizing
similar factors).
 
    Short-term debt securities with remaining  maturities of sixty days or  less
at  the time  of purchase  are valued  at amortized  cost, unless  the Directors
determine such does  not reflect  the securities'  market value,  in which  case
these securities
 
                                       22
<PAGE>
will be valued at their fair value as determined by the Directors.
 
    Certain  securities  in the  Fund's portfolio  may be  valued by  an outside
pricing service  approved  by the  Fund's  Directors. 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 applicable Class of the Fund (or, if specified by the shareholder,
in  shares  of any  other  open-end Dean  Witter  Fund), unless  the shareholder
requests that they be paid in cash. Shares so acquired are acquired at net asset
value and are not  subject to the  imposition of a front-end  sales charge or  a
CDSC (see "Redemptions and Repurchases").
 
    EASYINVEST.-SM-    Shareholders may  subscribe  to EasyInvest,  an automatic
purchase plan  which  provides  for  any  amount  from  $100  to  $5,000  to  be
transferred  automatically  from a  checking  or savings  account,  or following
redemption of shares  of a  Dean Witter money  market fund,  on a  semi-monthly,
monthly  or quarterly basis, to  the Transfer Agent for  investment in shares of
the   Fund   (see   "Purchase   of    Fund   Shares"   and   "Redemptions    and
Repurchases--Involuntary Redemption").
 
    INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who   receives  a  cash  payment  representing   a  dividend  or  capital  gains
distribution  may  invest  such  dividend  or  distribution  in  shares  of  the
applicable  Class at the net asset value per share next determined after receipt
by the Transfer Agent, by  returning the check or  the proceeds to the  Transfer
Agent within thirty days after the payment date. Shares so acquired are acquired
at  net asset value and  are not subject to the  imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases.")
 
    SYSTEMATIC WITHDRAWAL PLAN.  A  systematic withdrawal plan (the  "Withdrawal
Plan")  is available  for shareholders  who own or  purchase shares  of the Fund
having a minimum value of $10,000 based  upon the then current net asset  value.
The  Withdrawal Plan provides  for monthly or  quarterly (March, June, September
and December)  checks  in  any amount,  not  less  than $25,  or  in  any  whole
percentage  of the account balance, on  an annualized basis. Any applicable CDSC
will be imposed on shares redeemed  under the Withdrawal Plan (see "Purchase  of
Fund  Shares"). Therefore, any shareholder  participating in the Withdrawal Plan
will have  sufficient  shares redeemed  from  his or  her  account so  that  the
proceeds  (net of any applicable CDSC) to the shareholder will be the designated
monthly or quarterly amount. Withdrawal  Plan payments should not be  considered
as   dividends,  yields  or   income.  If  periodic   withdrawal  plan  payments
continuously  exceed  net   investment  income  and   net  capital  gains,   the
shareholder's original investment will be correspondingly reduced and ultimately
exhausted.  Each withdrawal constitutes  a redemption of shares  and any gain or
loss realized must be recognized for Federal income tax purposes.
 
    Shareholders should  contact  their  DWR  or  other  Selected  Broker-Dealer
account executive or the Transfer Agent for further information about any of the
above services.
 
    TAX  SHELTERED RETIREMENT PLANS.  Retirement plans are available through DWR
for use  by  corporations,  the self-employed,  eligible  Individual  Retirement
Accounts  and Custodial Accounts under Section 403(b)(7) of the Internal Revenue
Code.
Adop-
 
                                       23
<PAGE>
tion of such plans should be on advice of legal counsel or tax adviser.
 
    For further information  regarding plan administration,  custodial fees  and
other  details, investors should contact their account executive or the Transfer
Agent.
 
EXCHANGE PRIVILEGE
 
    Shares of each Class may  be exchanged for shares of  the same Class of  any
other  Dean Witter Multi-Class Fund without  the imposition of any exchange fee.
Shares may also  be exchanged  for shares of  the following  funds: Dean  Witter
Short-Term  U.S. Treasury Trust, Dean Witter  Limited Term Municipal Trust, Dean
Witter Short-Term Bond Fund, Dean  Witter Intermediate Term U.S. Treasury  Trust
and  five Dean Witter funds which are money market funds (the "Exchange Funds").
Class A  shares may  also be  exchanged for  shares of  Dean Witter  Multi-State
Municipal  Series Trust and  Dean Witter Hawaii Municipal  Trust, which are Dean
Witter Funds sold with  a front-end sales charge  ("FSC Funds"). Class B  shares
may  also be exchanged for  shares of Dean Witter  Global Short-Term Income Fund
Inc., Dean  Witter High  Income Securities  and Dean  Witter National  Municipal
Trust, which are Dean Witter Funds offered with a CDSC ("CDSC Funds"). Exchanges
may  be made after the shares of the  Fund acquired by purchase (not by exchange
or dividend reinvestment) have  been held for thirty  days. There is no  waiting
period for exchanges of shares acquired by exchange or dividend reinvestment.
 
    An  exchange to another Dean Witter Multi-Class Fund, any FSC Fund, any CDSC
Fund or any Exchange Fund that is not a money market fund is on the basis of the
next calculated net asset value per share of each fund after the exchange  order
is  received. When exchanging into a money  market fund from the Fund, shares of
the Fund are redeemed out of the  Fund at their next calculated net asset  value
and  the proceeds  of the redemption  are used  to purchase shares  of the money
market fund at  their net  asset value  determined the  following business  day.
Subsequent  exchanges between any of the money  market funds and any of the Dean
Witter Multi-Class Funds, FSC Funds or CDSC  Funds or any Exchange Fund that  is
not a money market fund can be effected on the same basis.
 
    No  CDSC is  imposed at  the time  of any  exchange of  shares, although any
applicable CDSC will be imposed upon  ultimate redemption. During the period  of
time  the shareholder remains in an Exchange  Fund (calculated from the last day
of the  month in  which the  Exchange Fund  shares were  acquired), the  holding
period (for the purpose of determining the rate of the CDSC) is frozen. If those
shares  are subsequently  re-exchanged for shares  of a  Dean Witter Multi-Class
Fund or shares of  a CDSC Fund,  the holding period  previously frozen when  the
first  exchange was made resumes on the last day of the month in which shares of
a Dean Witter Multi-Class Fund  or shares of a  CDSC Fund are reacquired.  Thus,
the  CDSC is based upon the time (calculated as described above) the shareholder
was invested in shares of a Dean Witter Multi-Class Fund or in shares of a  CDSC
Fund (see "Purchase of Fund Shares"). In the case of exchanges of Class A shares
which  are  subject  to  a  CDSC, the  holding  period  also  includes  the time
(calculated as described above) the shareholder was invested in shares of a  FSC
Fund. However, in the case of shares exchanged into an Exchange Fund on or after
April  23,  1990, upon  a redemption  of shares  which results  in a  CDSC being
imposed, a credit (not  to exceed the amount  of the CDSC) will  be given in  an
amount  equal to the Exchange Fund 12b-1  distribution fees incurred on or after
that  date  which  are  attributable  to  those  shares.  (Exchange  Fund  12b-1
distribution  fees are described  in the prospectuses for  those funds.) Class B
shares of the  Fund acquired  in exchange  for Class  B shares  of another  Dean
Witter  Multi-Class  Fund or  shares  of a  CDSC  Fund having  a  different CDSC
schedule than that of  this Fund will  be subject to  the higher CDSC  schedule,
even  if such shares are  subsequently re-exchanged for shares  of the fund with
the lower CDSC schedule.
 
                                       24
<PAGE>
    ADDITIONAL INFORMATION REGARDING EXCHANGES.  Purchases and exchanges  should
be  made for investment  purposes only. A  pattern of frequent  exchanges may be
deemed by  the  Investment  Manager to  be  abusive  and contrary  to  the  best
interests  of the  Fund's other  shareholders and,  at the  Investment Manager's
discretion, may be limited by the Fund's refusal to accept additional  purchases
and/  or  exchanges from  the  investor. Although  the  Fund does  not  have any
specific definition of  what constitutes  a pattern of  frequent exchanges,  and
will consider all relevant factors in determining whether a particular situation
is  abusive  and  contrary to  the  best interests  of  the Fund  and  its other
shareholders, investors should be aware that the Fund and each of the other Dean
Witter Funds may in their discretion  limit or otherwise restrict the number  of
times  this  Exchange  Privilege may  be  exercised  by any  investor.  Any such
restriction will be made by the Fund on a prospective basis only, upon notice to
the shareholder not later than ten days following such shareholder's most recent
exchange.
 
    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 of  each
Class  of shares and any other conditions imposed by each fund. In the case of a
shareholder holding a  share certificate  or certificates, no  exchanges may  be
made  until all applicable share certificates have been received by the Transfer
Agent and deposited in  the shareholder's account. An  exchange will be  treated
for  federal  income tax  purposes the  same  as a  repurchase or  redemption of
shares, on which the  shareholder may realize a  capital gain or loss.  However,
the ability to deduct capital losses on an exchange may be limited in situations
where  there is an  exchange of shares  within ninety days  after the shares are
purchased. The Exchange Privilege is only available in states where an  exchange
may legally be made.
 
    If  DWR or  another Selected Broker-Dealer  is the  current broker-dealer of
record and its account numbers are part of the account information, shareholders
may initiate an exchange  of shares of the  Fund for shares of  any of the  Dean
Witter  Funds (for which  the Exchange Privilege is  available) pursuant to this
Exchange Privilege by contacting their account executive (no Exchange  Privilege
Authorization  Form is required). Other shareholders (and those shareholders who
are clients  of DWR  or another  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
 
                                       25
<PAGE>
Form  and who is unable to reach the Fund by telephone should contact his or her
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.
 
    For  further  information  concerning the  Exchange  Privilege, shareholders
should contact their DWR  or other Selected  Broker-Dealer account executive  or
the Transfer Agent.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.   Shares of each  Class of the Fund can  be redeemed for cash at
any time at the net asset value per share next determined less the amount of any
applicable CDSC in the case of Class A, Class B or Class C shares (see "Purchase
of Fund Shares"). If shares are held in a Shareholder Investment Account without
a share certificate,  a written request  for redemption to  the Fund's  Transfer
Agent  at P.O. Box 983,  Jersey City, NJ 07303  is required. If certificates are
held by  the  shareholder,  the  shares may  be  redeemed  by  surrendering  the
certificates  with a written  request for redemption,  along with any additional
information required by the Transfer Agent.
 
   
    REPURCHASE.   DWR  and  other  Selected  Broker-Dealers  are  authorized  to
repurchase  shares represented by a share  certificate which is delivered to any
of their  offices.  Shares held  in  a  shareholder's account  without  a  share
certificate  may also  be repurchased by  DWR and  other Selected Broker-Dealers
upon the telephonic or  telegraphic request of  the shareholder. The  repurchase
price  is the net  asset value 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 by the Fund, the Distributor,
or  DWR or other Selected Broker-Dealer. The  offer by the Distributor and other
Selected Broker-Dealers to repurchase shares may be suspended without notice  by
the Distributor at any time. In that event, shareholders may redeem their shares
through the Fund's Transfer Agent as set forth above under "Redemption".
 
    PAYMENT  FOR SHARES REDEEMED  OR REPURCHASED.   Payment for shares presented
for repurchase  or redemption  will be  made by  check within  seven days  after
receipt  by the Transfer Agent of the certificate and/or written request in good
order. Such payment may be postponed or the right of redemption suspended  under
unusual  circumstances; E.G., when normal trading is not taking place on the New
York Stock Exchange. If the shares  to be redeemed have recently been  purchased
by check, payment of the redemption proceeds may be delayed for the minimum time
needed  to verify that the check used  for investment has been honored (not more
than fifteen days from the time of receipt of the check by the Transfer  Agent).
Shareholders   maintaining  margin   accounts  with  DWR   or  another  Selected
Broker-Dealer are referred to their account executive regarding restrictions  on
redemption of shares of the Fund pledged in the margin account.
 
    REINSTATEMENT  PRIVILEGE.   A  shareholder  who has  had  his or  her shares
redeemed or  repurchased and  has not  previously exercised  this  reinstatement
privilege  may, within 35 days  after the date of  the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase in
shares of the Fund  in the same  Class from which such  shares were redeemed  or
repurchased  at  their net  asset value  next  determined after  a reinstatement
request, together  with the  proceeds, is  received by  the Transfer  Agent  and
receive  a pro rata credit for any  CDSC paid in connection with such redemption
or repurchase.
 
   
    INVOLUNTARY REDEMPTION.  The Fund reserves  the right to redeem, upon  sixty
days'  notice and at net asset value,  the shares of any shareholder (other than
shares held  in an  Individual  Retirement Account  or Custodial  Account  under
Section  403(b)(7) of the  Internal Revenue Code)  whose shares have  a value of
less than $100, or such lesser
    
 
                                       26
<PAGE>
   
amount as may be fixed by  the Fund's Board of Directors  or, in the case of  an
account  opened through EasyInvest-SM-,  if after twelve  months the shareholder
has invested less than $1,000 in  the account. However, before the Fund  redeems
such  shares  and sends  the proceeds  to  the shareholder,  it will  notify the
shareholder that the value of the shares is less than the applicable amount  and
allow  the shareholder sixty days to make  an additional investment in an amount
which will increase the value of the  account to at least the applicable  amount
before  the redemption is processed. No CDSC  will be imposed on any involuntary
redemption.
    
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS AND DISTRIBUTIONS.   The  Fund declares  dividends separately  for
each  Class  of shares  and intends  to  pay quarterly  income dividends  and to
distribute net short-term and long-term capital gains, if any, at least once per
year. The Fund may, however, determine either to distribute or to retain all  or
part of any long-term capital gains in any year for reinvestment.
 
   
    All dividends and any capital gains distributions will be paid in additional
shares of the same Class and will be automatically credited to the shareholder's
account  without issuance of a share certificate unless the shareholder requests
in writing that all dividends be paid  in cash. Shares acquired by dividend  and
distribution  reinvestments will not be subject to any front-end sales charge or
CDSC. Class B  shares acquired through  dividend and distribution  reinvestments
will  become eligible  for conversion  to Class  A shares  on a  pro rata basis.
Distributions paid on Class A and Class D shares will be higher than for Class B
and Class C shares because distribution fees paid by Class B and Class C  shares
are  higher. (See  "Shareholder Services--Automatic Investment  of Dividends and
Distributions.")
    
 
    TAXES.  Because  the Fund intends  to distribute all  of its net  investment
income  and net short-term capital gains to shareholders and remain qualified as
a regulated investment company under Subchapter M of the Internal Revenue  Code,
it  is not expected that the Fund will be required to pay any federal income tax
on such income and capital gains. Shareholders will normally have to pay Federal
income taxes, and  any state income  taxes, on the  dividends and  distributions
they receive from the Fund. Such dividends and distributions, to the extent that
they are derived from 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  payments  in  additional  shares  or  in  cash. Any
dividends declared in the last  quarter of any calendar  year which are paid  in
the  following  calendar  year prior  to  February  1 will  be  deemed,  for tax
purposes, to have been received by  the shareholder in the prior year.  Dividend
distributions  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. In this  regard,
a 46-day holding period generally must be met.
 
    Distributions  of  net  long-term  capital gains,  if  any,  are  taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. Capital  gains distributions are not eligible  for
the dividends received deduction.
 
    The  Fund may at times  make payments from sources  other than income or net
capital gains. Payments from such sources will, in effect, represent a return of
a portion of each shareholder's investment. All, or a portion, of such  payments
will not be taxable to shareholders.
 
    After  the end of  the 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,
 
                                       27
<PAGE>
the portion taxable as capital gains,  and the amount of dividends eligible  for
the  Federal dividends  received deduction  available to  corporations. To avoid
being subject to  a 31%  Federal backup  withholding tax  on taxable  dividends,
capital  gains distributions  and the  proceeds of  redemptions and repurchases,
shareholders' taxpayer identification numbers must be furnished and certified as
to their accuracy.
 
    Shareholders should consult their  tax advisers as  to the applicability  of
the foregoing to their current situation.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From  time to time the  Fund may quote its  "total return" in advertisements
and sales literature. These figures are  computed separately for Class A,  Class
B,  Class  C and  Class D  shares.  The total  return of  the  Fund is  based on
historical earnings  and is  not intended  to indicate  future performance.  The
"average  annual total  return" of  the Fund refers  to a  figure reflecting the
average annualized percentage increase (or decrease) in the value of an  initial
investment  in a Class of the  Fund of $1,000 over periods  of one, five and ten
years. 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
applicable Class and all sales charges which would be incurred by  shareholders,
for  the  stated periods.  It  also assumes  reinvestment  of all  dividends and
distributions paid by the Fund.
 
   
    In addition to the  foregoing, the Fund may  advertise its total return  for
each  Class  over different  periods  of time  by  means of  aggregate, average,
year-by-year or other types  of total return figures.  Such calculations may  or
may  not reflect the  deduction of any  sales charge which,  if reflected, would
reduce the  performance quoted.  The Fund  may also  advertise the  growth of  a
hypothetical  investment of $10,000, $50,000 or $100,000 in each Class of shares
of the Fund.  The Fund  from time  to time  may also  advertise its  performance
relative  to certain  performance rankings  and indexes  compiled by independent
organizations, such as  mutual fund  performance rankings  of Lipper  Analytical
Services, Inc.
    
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING  RIGHTS.   All shares of  common stock of  the Fund are  of $0.01 par
value and are  equal as to  earnings, assets and  voting privileges except  that
each  Class  will  have  exclusive voting  privileges  with  respect  to matters
relating to distribution expenses borne solely by such Class or any other matter
in which the  interests of  one Class  differ from  the interests  of any  other
Class.  In addition,  Class B shareholders  will have  the right to  vote on any
proposed material increase in Class A's expenses, if such proposal is  submitted
separately  to Class A shareholders. Also, as discussed herein, Class A, Class B
and Class C bear  the expenses related to  the distribution of their  respective
shares.
 
    Under  ordinary circumstances, the Fund is not required, nor does it intend,
to hold Annual Meetings of Shareholders. The Directors may call Special Meetings
of Shareholders for action by shareholder 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
 
                                       28
<PAGE>
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 prohibits engaging in futures and
options transactions and profiting  on short-term trading  (that is, a  purchase
within  sixty days of  a sale or  a sale within  sixty days of  a purchase) of a
security. In addition, investment personnel may not purchase or sell a  security
for their personal account within thirty days before or after any transaction in
any  Dean Witter Fund managed by them. Any  violations of the Code of Ethics are
subject to sanctions, including reprimand, demotion or suspension or termination
of employment. The Code of Ethics comports with regulatory requirements and  the
recommendations  in the 1994 report by the Investment Company Institute Advisory
Group on Personal Investing.
 
    MASTER/FEEDER CONVERSION.  The  Fund reserves the right  to seek to  achieve
its  investment  objective  by  investing  all of  its  investable  assets  in a
diversified, open-end management investment  company having the same  investment
objective  and policies  and substantially  the same  investment restrictions as
those applicable to the Fund.
 
    SHAREHOLDER INQUIRIES.  All inquiries regarding the Fund should be  directed
to  the Fund at the telephone numbers or address set forth on the front cover of
this Prospectus.
 
                                       29
<PAGE>
                        THE DEAN WITTER FAMILY OF FUNDS
 
MONEY MARKET FUNDS                       DEAN WITTER RETIREMENT SERIES
Dean Witter Liquid Asset Fund Inc.       Liquid Asset Series
Dean Witter U.S. Government Money        U.S. Government Money Market Series
Market Trust                             U.S. Government Securities Series
Dean Witter Tax-Free Daily Income Trust  Intermediate Income Securities Series
Dean Witter California Tax-Free Daily    American Value Series
Income Trust                             Capital Growth Series
Dean Witter New York Municipal Money     Dividend Growth Series
Market Trust                             Strategist Series
EQUITY FUNDS                             Utilities Series
Dean Witter American Value Fund          Value-Added Market Series
Dean Witter Natural Resource             Global Equity Series
Development Securities Inc.              ASSET ALLOCATION FUNDS
Dean Witter Dividend Growth Securities   Dean Witter Strategist Fund
Inc.                                     Dean Witter Global Asset Allocation
Dean Witter Developing Growth            Fund
Securities Trust                         ACTIVE ASSETS ACCOUNT PROGRAM
Dean Witter World Wide Investment Trust  Active Assets Money Trust
Dean Witter Value-Added Market Series    Active Assets Tax-Free Trust
Dean Witter Utilities Fund               Active Assets California Tax-Free Trust
Dean Witter Capital Growth Securities    Active Assets Government Securities
Dean Witter European Growth Fund Inc.    Trust
Dean Witter Precious Metals and
Minerals Trust
Dean Witter Pacific Growth Fund Inc.
Dean Witter Health Sciences Trust
Dean Witter Global Dividend Growth
Securities
Dean Witter Global Utilities Fund
Dean Witter International SmallCap Fund
Dean Witter Mid-Cap Growth Fund
Dean Witter Balanced Growth Fund
Dean Witter Capital Appreciation Fund
Dean Witter Information Fund
Dean Witter Japan Fund
Dean Witter Special Value Fund
Dean Witter Financial Services Trust
Dean Witter Market Leader Trust
FIXED-INCOME FUNDS
Dean Witter High Yield Securities Inc.
Dean Witter Tax-Exempt Securities Trust
Dean Witter U.S. Government Securities
Trust
Dean Witter Federal Securities Trust
Dean Witter Convertible Securities
Trust
Dean Witter California Tax-Free Income
Fund
Dean Witter New York Tax-Free Income
Fund
Dean Witter World Wide Income Trust
Dean Witter Intermediate Income
Securities
Dean Witter Global Short-Term Income
Fund Inc.
Dean Witter Multi-State Municipal
Series Trust
Dean Witter Short-Term U.S. Treasury
Trust
Dean Witter Diversified Income Trust
Dean Witter Limited Term Municipal
Trust
Dean Witter Short-Term Bond Fund
Dean Witter High Income Securities
Dean Witter National Municipal Trust
Dean Witter Balanced Income Fund
Dean Witter Hawaii Municipal Trust
Dean Witter Intermediate Term U.S.
Treasury Trust
 
<PAGE>
 
Dean Witter
Dividend Growth Securities Inc.
Two World Trade Center
New York, New York 10048
BOARD OF DIRECTORS                  DEAN WITTER
Michael Bozic                       DIVIDEND
Charles A. Fiumefreddo              GROWTH
Edwin J. Garn                       SECURITIES
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
Paul D. Vance
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 -- JULY 28, 1997
<PAGE>
 
<TABLE>
<S>                                           <C>
STATEMENT OF ADDITIONAL INFORMATION           DEAN WITTER
JULY 28, 1997                                 DIVIDEND
                                              GROWTH
                                              SECURITIES INC.
</TABLE>
 
- ------------------------------------------------------------
 
    Dean Witter Dividend Growth Securities Inc. (the "Fund") is an open-end,
diversified management investment company whose investment objective is to
provide reasonable current income and long-term growth of income and capital.
The Fund invests primarily in common stock of companies with a record of paying
dividends and the potential for increasing dividends. (See "Investment Practices
and Policies".)
 
    A Prospectus for the Fund dated July 28, 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
Dividend Growth 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..........................................    14
Portfolio Transactions and Brokerage.............................    15
The Distributor..................................................    16
Purchase of Fund Shares..........................................    21
Shareholder Services.............................................    24
Redemptions and Repurchases......................................    28
Dividends, Distributions and Taxes...............................    30
Performance Information..........................................    30
Shares of the Fund...............................................    31
Custodian and Transfer Agent.....................................    31
Independent Accountants..........................................    32
Reports to Shareholders..........................................    32
Legal Counsel....................................................    32
Experts..........................................................    32
Registration Statement...........................................    32
Financial Statements.............................................    36
Report of Independent Accountants................................    45
</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 Dividend Growth 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 Dividend Growth 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 Morgan Stanley, Dean Witter, Discover & Co. ("MSDWD"), a Delaware
corporation. In an internal reorganization which took place in January, 1993,
InterCapital assumed the investment advisory, administrative and management
activities previously performed by the InterCapital Division of Dean Witter
Reynolds Inc. ("DWR"), a broker-dealer affiliate of InterCapital. (As
hereinafter used in this Statement of Additional Information, the terms
"InterCapital" and "Investment Manager" refer to DWR's InterCapital Division
prior to the internal reorganization and 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."
 
    The Investment Manager 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, InterCapital Insured Municipal Income
Trust, InterCapital California Insured Municipal Income Trust, InterCapital
Insured Municipal Securities, InterCapital Insured California Municipal
Securities, InterCapital Quality Municipal Investment Trust, InterCapital
Quality Municipal Income Trust, InterCapital Quality Municipal Securities,
InterCapital California Quality Municipal Securities, InterCapital New York
Quality Municipal Securities, High Income Advantage Trust, High Income Advantage
Trust II, High Income Advantage Trust III, Dean Witter Government Income 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 Natural Resource Development Securities Inc., Dean
Witter Dividend Growth Securities Inc., Dean Witter American Value Fund, Dean
Witter Select Municipal Reinvestment Fund, Dean Witter Variable Investment
Series, Dean Witter World Wide Investment Trust, Dean Witter U.S. Government
Securities Trust, Dean Witter U.S. Government Money Market 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, Dean Witter Utilities Fund, Dean Witter
Strategist Fund, Dean Witter California Tax-Free Daily Income Trust, Dean Witter
World Wide Income Trust, Dean Witter Intermediate Income Securities, Dean Witter
Capital Growth Securities, Dean Witter New York Municipal Money Market Trust,
Dean Witter European Growth Fund Inc., Dean Witter Pacific Growth Fund Inc.,
Dean Witter Precious Metals and Minerals Trust, Dean Witter Global Short-Term
Income Fund Inc., Dean Witter Multi-State Municipal Series Trust, Dean Witter
Short-Term U.S. Treasury Trust, Dean Witter Diversified Income Trust, Dean
Witter Health Sciences Trust, Dean Witter Retirement Series, Dean Witter Global
Dividend Growth Securities, Dean Witter Limited Term Municipal Trust, Dean
Witter Special Value Fund, Dean Witter Income Builder Fund, Dean Witter
Financial Services Trust, Dean Witter Market Leader Trust, Dean Witter
Short-Term Bond Fund, Dean Witter Global Utilities Fund, Dean Witter
International SmallCap Fund, Dean Witter Mid-Cap Growth Fund, Dean Witter High
Income Securities, Dean Witter National Municipal Trust, Dean Witter Select
Dimensions Investment Series, Dean Witter Global Asset Allocation Fund, Dean
Witter Balanced Growth Fund, Dean Witter Balanced Income Fund, Dean Witter
Hawaii Municipal Trust, Dean Witter Capital Appreciation Fund, Dean Witter
Information Fund, Dean Witter Intermediate Term U.S. Treasury Trust, Dean Witter
Japan Fund, 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
 
                                       3
<PAGE>
Trust, Municipal Income Opportunities Trust II, Municipal Income Opportunities
Trust III, Municipal Premium Income Trust and Prime Income Trust. The foregoing
investment companies, together with the Trust, are collectively referred to as
the Dean Witter Funds.
 
    In addition, Dean Witter Services Company Inc. ("DWSC"), a wholly-owned
subsidiary of InterCapital, serves as manager for the following 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
Emerging Markets Opportunities Trust, TCW/DW Global Telecom Trust, TCW/DW
Strategic Income Fund, TCW/DW Term Trust 2000, TCW/DW Term Trust 2002 and TCW/DW
Term Trust 2003 (the "TCW/ DW Funds"). InterCapital also serves as: (i)
administrator of The BlackRock Strategic Term Trust Inc., a closed-end
investment company; and (ii) sub-administrator of MassMutual 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 Management Agreement.
 
    Expenses not expressly assumed by the Investment Manager under the Agreement
or by the Distributor of the Fund's shares, Dean Witter Distributors Inc.
("Distributors" or the "Distributor") (see "The Distributor"), will be paid by
the Fund. These expenses will be allocated among the four classes of shares of
the Fund (each, a "Class") pro rata based on the net assets of the Fund
attributable to each Class, except as described below. The expenses borne by the
Fund include, but are not limited to: expenses of the Plan of Distribution
pursuant to Rule 12b-1 (the "12b-1 fee") (see "The Distributor"); charges and
expenses of any registrar, custodian, stock transfer and dividend disbursing
agent; brokerage commissions; taxes; engraving and printing 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
 
                                       4
<PAGE>
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 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. The 12b-1 fees relating to a particular Class will be
allocated directly to that Class. In addition, other expenses associated with a
particular Class (except advisory or custodial fees) may be allocated directly
to that Class, provided that such expenses are reasonably identified as
specifically attributable to that Class and the direct allocation to that Class
is approved by the Directors.
 
    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 daily net assets not exceeding
$250 million; 0.50% of the portion of daily net assets exceeding $250 million
but not exceeding $1 billion; 0.475% of the portion of daily net assets
exceeding $1 billion but not exceeding $2 billion; 0.45% of the portion of daily
net assets exceeding $2 billion but not exceeding $3 billion; 0.425% of the
portion of daily net assets exceeding $3 billion but not exceeding $4 billion;
0.40% of the portion of daily net assets exceeding $4 billion but not exceeding
$5 billion; 0.375% of the portion of daily net assets exceeding $5 billion but
not exceeding $6 billion; 0.350% of the portion of daily net assets exceeding $6
billion but not exceeding $8 billion; 0.325% of the portion of daily net assets
exceeding $8 billion but not exceeding $10 billion; 0.30% of the portion of
daily net assets exceeding $10 billion but not exceeding $15 billion; and 0.275%
on the portion of daily net assets exceeding $15 billion. For the fiscal years
ended February 28, 1995, February 29, 1996 and February 28, 1997 the Fund
accrued to the Investment Manager total compensation of $29,221,606, $34,849,553
and $43,410,540, 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 Board of Directors on February
21, 1997 and by the shareholders of the Fund at a Special Meeting of
Shareholders held on May 21, 1997. The Agreement is substantially identical to a
prior investment management agreement which was initially approved by the Board
of Directors on October 30, 1992 and by the shareholders of the Fund at a
Special Meeting of Shareholders held on January 12, 1993 as such agreement had
been amended by the Board of Directors at their meeting held on April 24, 1997
to provide a breakpoint in the management fee that reduced the compensation
received by the Investment Manager under the agreement on assets exceeding $10
billion. The Agreement took effect on May 31, 1997 upon the consummation of the
merger of Dean Witter, Discover & Co. with Morgan Stanley Group Inc. The
Agreement may be terminated at any time, without penalty, on thirty days' notice
by the Board of Directors of the Fund, by the holders of a majority, as defined
in the Investment Company Act of 1940 (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 has an initial term ending April 30, 1999 and
will remain in effect from year to year thereafter, provided continuance of the
Agreement is approved at least annually by the vote of the holders of a
majority, as defined in the Act, of the outstanding shares of the Fund, or by
the Board of Directors of the Fund; provided that in either event such
continuance is approved annually by the vote
 
                                       5
<PAGE>
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 (the
"Independent Directors"), which vote must be cast in person at a meeting called
for the purpose of voting on such approval.
 
    The Fund has acknowledged that the name "Dean Witter" is a property right of
DWR. The Fund has agreed that DWR or its parent company may use or, at any time,
permit others to use, the name "Dean Witter." The Fund has also agreed that in
the event the Agreement between the Investment Manager and the Fund is
terminated, or if the affiliation between the Investment Manager and its parent
is terminated, the Fund will eliminate the name "Dean Witter" from its name if
DWR or its parent shall so request.
 
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 the
83 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
Director                                    (since November, 1995); Director or Trustee of the Dean Witter Funds;
c/o Levitz Furniture Corporation            formerly President and Chief Executive Officer of Hills Department
6111 Broken Sound Parkway, N.W.             Stores (May, 1991-July, 1995); formerly variously Chairman, Chief
Boca Raton, Florida                         Executive Officer, President and Chief Operating Officer (1987-1991)
                                            of the Sears Merchandise Group of Sears, Roebuck and Co.; Director of
                                            Eaglemark Financial Services, Inc., the United Negro College Fund, and
                                            Weirton Steel Corporation.
Charles A. Fiumefreddo* (64)                Chairman, Chief Executive Officer and Director of InterCapital,
Chairman, President,                        Distributors and DWSC; Executive Vice President and Director of DWR;
Chief Executive Officer and Director        Chairman, Director or Trustee, President and Chief Executive Officer
Two World Trade Center                      of the Dean Witter Funds; Chairman, Chief Executive Officer and
New York, New York                          Trustee of the TCW/DW Funds; Chairman and Director of Dean Witter
                                            Trust Company ("DWTC"); Director and/or officer of various MSDWD
                                            subsidiaries; formerly Executive Vice President and Director of Dean
                                            Witter, Discover & Co. (until February, 1993).
Edwin J. Garn (64)                          Director or Trustee of the Dean Witter Funds; formerly United States
Director                                    Senator (R-Utah) (1974-1992) and Chairman, Senate Banking Committee
c/o Huntsman Corporation                    (1980-1986); formerly Mayor of Salt Lake City, Utah (1971-1974);
500 Huntsman Way                            formerly Astronaut, Space Shuttle Discovery (April 12-19, 1985); Vice
Salt Lake City, Utah                        Chairman, Huntsman Corporation (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
Two World Trade Center                      Witter Funds; Chairman of the Audit Committee and Chairman of the
New York, New York                          Committee of the Independent Trustees and Trustee of the TCW/DW Funds;
                                            formerly President, Council for Aid to Education (1978-1989) and
                                            Chairman and Chief Executive Officer of Anchor Corporation, an
                                            Investment Adviser (1964-1978); Director of Washington National
                                            Corporation (insurance).
</TABLE>
 
                                       6
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND
               AND ADDRESS                               PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------  ----------------------------------------------------------------------
<S>                                         <C>
Wayne E. Hedien** (63)                      Retired, Director or Trustee of the Dean Witter Funds (commencing on
Director                                    September 1, 1997); Director of The PMI Group, Inc. (private mortgage
c/o Gordon Altman Butowsky                  insurance); Trustee and Vice Chairman of The Field Museum of Natural
 Weitzen Shalov & Wein                      History; formerly associated with the Allstate Companies (1966-1994),
Counsel to the Independent Directors        most recently as Chairman of The Allstate Corporation (March,
114 West 47th Street                        1993-December, 1994) and Chairman and Chief Executive Officer of its
New York, New York                          wholly-owned subsidiary, Allstate Insurance Company (July,
                                            1989-December, 1994); director of various other business and
                                            charitable organizations.
Dr. Manuel H. Johnson (48)                  Senior Partner, Johnson Smick International, Inc., a consulting firm;
Director                                    Co-Chairman and a founder of the Group of Seven Counsel (G7C), an
c/o Johnson Smick International, Inc.       international economic commission; Director or Trustee of the Dean
1133 Connecticut Avenue, N.W.               Witter Funds; Trustee of the TCW/DW Funds; Director of NASDAQ (since
Washington, DC                              June, 1995); Director of Greenwich Capital Markets Inc.
                                            (broker-dealer); Trustee of the Financial Accounting Foundation
                                            (oversight organization for the Financial Accounting Standards Board);
                                            formerly Vice Chairman of the Board of Governors of the Federal
                                            Reserve System (1986-1990) and Assistant Secretary of the U.S.
                                            Treasury.
Michael E. Nugent (61)                      General Partner, Triumph Capital, L.P., a private investment
Director                                    partnership; Director or Trustee of the Dean Witter Funds; Trustee of
c/o Triumph Capital, L.P.                   the TCW/DW Funds; formerly Vice President, Bankers Trust Company and
237 Park Avenue                             BT Capital Corporation (1984-1988); Director of various business
New York, New York                          organizations.
Philip J. Purcell* (53)                     Chairman of the Board of Directors and Chief Executive Officer of
Director                                    MSDWD, DWR and Novus Credit Services Inc.; Director of InterCapital,
1585 Broadway                               DWSC and Distributors; Director or Trustee of the Dean Witter Funds;
New York, New York                          Director and/or officer of various MSDWD subsidiaries.
John L. Schroeder (66)                      Retired; Director or Trustee of the Dean Witter Funds; Trustee of the
Director                                    TCW/DW Funds; Director of Citizens Utilities Company; Formerly
c/o Gordon Altman Butowsky                  Executive Vice President and Chief Investment Officer of the Home
Weitzen Shalov & Wein                       Insurance Company (August, 1991-September, 1995).
Counsel to the Independent Directors
114 West 47th Street
New York, New York
Barry Fink (42)                             Senior Vice President (since March, 1997) and Secretary and General
Vice President,                             Counsel (since February, 1997) of InterCapital and DWSC; Senior Vice
Secretary and General Counsel               President (since March, 1997) and Assistant Secretary and Assistant
Two World Trade Center                      General Counsel (since February, 1997) of Distributors; Assistant
New York, New York                          Secretary of DWR (since August, 1996); Vice President, Secretary and
                                            General Counsel of the Dean Witter Funds and the TCW/DW Funds (since
                                            February, 1997); previously First Vice President (June, 1993-February,
                                            1997), Vice President (until June, 1993) and Assistant Secretary and
                                            Assistant General Counsel of InterCapital and DWSC and Assistant
                                            Secretary of the Dean Witter Funds and TCW/DW Funds.
</TABLE>
 
                                       7
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND
               AND ADDRESS                               PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------  ----------------------------------------------------------------------
<S>                                         <C>
Paul D. Vance (61)                          Senior Vice President of InterCapital; Vice President of various Dean
Vice President                              Witter Funds.
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
</TABLE>
 
- ------------
 *Denotes Directors who are "interested persons" of the Fund, as defined in the
  Act.
**Mr. Hedien's term as Director will commence on September 1, 1997.
 
    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, Mitchell M. Merin, President and Chief Strategic Officer of
InterCapital and DWSC, Executive Vice President of Distributors and DWTC and
Director of DWTC, Executive Vice President and Director of DWR, and Director of
SPS Transaction Services, Inc. and various other MSDWD subsidiaries, 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 Kenton J.
Hinchliffe, Mark Bavoso and Ira N. Ross, Senior Vice Presidents of InterCapital,
are Vice Presidents of the Fund. Marilyn K. Cranney, First Vice President and
Assistant General Counsel of InterCapital and DWSC, Lou Anne D. McInnis, Carsten
Otto and Ruth Rossi, Vice Presidents and Assistant General Counsels of
InterCapital and DWSC, and Frank Bruttomesso, a Staff Attorney with
InterCapital, are Assistant Secretaries of the Fund.
 
THE BOARD OF DIRECTORS, THE INDEPENDENT DIRECTORS, AND THE COMMITTEES
 
    The Board of Directors currently consists of eight (8) directors; as noted
above, Mr. Hedien's term will commence on September 1, 1997. 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 83 Dean Witter Funds,
comprised of 126 portfolios. As of June 30, 1997, the Dean Witter Funds had
total net assets of approximately $87.9 billion and more than six million
shareholders.
 
    Six Directors and Mr. Hedien (77% of the total number) have no affiliation
or business connection with InterCapital or any of its affiliated persons and do
not own any stock or other securities issued by InterCapital's parent company,
MSDWD. These are the "disinterested" or "independent" Directors. The other two
Directors (the "management Directors") are affiliated with InterCapital. Four of
the six independent Directors are also Independent Trustees 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 current 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.
 
                                       8
<PAGE>
    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 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 Trustee and, since July
1, 1996, as Chairman of the Committee of the Independent Trustees and the Audit
Committee of the TCW/DW Funds. The current Committee Chairman has had more than
35 years experience as a senior executive in the investment company industry.
 
ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT 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
 
                                       9
<PAGE>
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.............................................       1,800
</TABLE>
 
    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.
 
           CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
 
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS    FOR SERVICE
                                                                    CHAIRMAN OF          AS          TOTAL CASH
                                                                   COMMITTEES OF     CHAIRMAN OF    COMPENSATION
                               FOR SERVICE                          INDEPENDENT     COMMITTEES OF   FOR SERVICES
                              AS DIRECTOR OR                         DIRECTORS/      INDEPENDENT         TO
                               TRUSTEE AND       FOR SERVICE AS     TRUSTEES AND    TRUSTEES AND       82 DEAN
                             COMMITTEE MEMBER     TRUSTEE AND          AUDIT            AUDIT          WITTER
                                OF 82 DEAN      COMMITTEE MEMBER   COMMITTEES OF    COMMITTEES OF     FUNDS AND
NAME OF                           WITTER          OF 14 TCW/DW     82 DEAN WITTER     14 TCW/DW       14 TCW/DW
INDEPENDENT DIRECTOR              FUNDS              FUNDS             FUNDS            FUNDS           FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
<S>                          <C>                <C>                <C>              <C>             <C>
Michael Bozic..............      $138,850           --                 --               --            $138,850
Edwin J. Garn..............       140,900           --                 --               --             140,900
John R. Haire..............       106,400           $64,283           $195,450        $ 12,187         378,320
Dr. Manuel H. Johnson......       137,100            66,483            --               --             203,583
Michael E. Nugent..........       138,850            64,283            --               --             203,133
John L. Schroeder..........       137,150            69,083            --               --             206,233
</TABLE>
 
    As of the date of this Statement of Additional Information, 57 of the Dean
Witter Funds, 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
 
                                       10
<PAGE>
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.
- ------------
(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.
 
    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
March 31, 1997 and from the 57 Dean Witter Funds as of December 31, 1996.
 
          RETIREMENT BENEFITS FROM THE FUND AND ALL DEAN WITTER FUNDS
 
<TABLE>
<CAPTION>
                                          FOR ALL ADOPTING FUNDS                                      ESTIMATED ANNUAL
                                  --------------------------------------    RETIREMENT BENEFITS           BENEFITS
                                       ESTIMATED                            ACCRUED AS EXPENSES      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 beneficial interest 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
beneficial interest outstanding.
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
PORTFOLIO TRADING
 
    It is anticipated that the Fund's portfolio turnover rate will not exceed
90% in any one year. A 90% turnover rate would occur, for example, if 90% 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.
 
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
 
                                       11
<PAGE>
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 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 did not borrow any money during its fiscal year ended February 28,
1997 and it has no intention of borrowing any money in the foreseeable future.
 
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 Fund will receive interest from the
institution until the time when the repurchase is to occur. Although such date
is deemed by the Fund to be the maturity date of a repurchase agreement, the
maturities of securities subject to repurchase agreements are not subject to any
limits and may exceed one year. While repurchase agreements involve certain
risks not associated with direct investments in debt securities, the Fund
follows procedures designed to minimize such risks. These procedures include
effecting repurchase transactions only with large, well capitalized and well
established financial institutions under guidelines established and monitored by
the Board of Directors of the Fund. In addition, the value of the collateral
underlying the repurchase agreement will always 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 10% of its total assets. The Fund's investments in repurchase
agreements may at times be substantial when, in the view of the Investment
Manager, liquidity or other considerations warrant. However, during its fiscal
year ended February 28, 1997 the Fund did not enter into any repurchase
agreements to the extent that more than 5% of the Fund's net assets were at
risk, and the Fund does not intend to enter into any repurchase agreements to
the extent that more than 5% of the Fund's net assets will be at risk in the
foreseeable future.
 
                                       12
<PAGE>
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's commitments to purchase securities on a
when-issued, delayed delivery or forward commitment basis did not exceed 5% of
the Fund's net assets.
 
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 any
securities on a "when, as and if issued" basis and it does not intend to in the
foreeable future. 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.
 
    The Securities and Exchange Commission has 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 Investment Manager,
pursuant to procedures adopted by 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.
 
                                       13
<PAGE>
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.
 
    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 or commodity futures contracts.
 
         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. Write, purchase or sell puts, calls, or combinations thereof.
 
         6. 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 either
    the New York or American Stock Exchange. However, the acquisition of
    warrants attached to other securities is not subject to this restriction.
 
         7. Purchase securities of other investment companies, except in
    connection with a merger, consolidation, reorganization or acquisition of
    assets.
 
         8. 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).
 
         9. Pledge its assets or assign or otherwise encumber them except to
    secure borrowings effected within the limitations set forth in restriction
    (8). 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.
 
        10. 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.
 
        11. 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.
 
        12. Make short sales of securities.
 
                                       14
<PAGE>
        13. Purchase securities on margin, except for such short-term loans as
    are necessary for the clearance of purchases of portfolio securities.
 
        14. 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.
 
        15. Invest for the purpose of exercising control or management of any
    other issuer.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
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.
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 $850,977, $1,210,946, and $1,915,909 respectively,
in brokerage commissions.
 
    The Investment Manager currently serves as investment manager or advisor to
a number of clients, including other investment companies, and may in the future
act as investment manager or adviser to others. It is the practice of the
Investment Manager to cause purchase and sale transactions to be allocated among
the Fund and others whose assets it manages in such manner as it deems
equitable. In making such allocations among the Fund and other client accounts,
various factors may be considered, including the respective investment
objectives, the relative size of portfolio holdings of the same or comparable
securities, the availability of cash for investment, the size of investment
commitments generally held and the opinions of the persons responsible for
managing the portfolios of the Fund and other client accounts. In the case of
certain initial and secondary public offerings, the Investment Manager may
utilize a pro-rata allocation process based on the size of the Dean Witter Funds
involved and the number of shares available from the public offering.
 
    The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of transactions. Consistent with this
policy, when securities transactions are effected on a stock exchange, the
Fund's policy is to pay commissions which are considered fair and reasonable
without necessarily determining that the lowest possible commissions are paid in
all circumstances. The Fund believes that a requirement always to seek the
lowest possible commission cost could impede effective portfolio management and
preclude the Fund and the Investment Manager from obtaining a high quality of
brokerage and research services. In seeking to determine the reasonableness of
brokerage 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
 
                                       15
<PAGE>
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 $1,336,367 in brokerage commissions in connection with
transactions in the aggregate amount of $897,498,007 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 and other affiliated brokers and dealers. In order for an
affiliated broker or dealer to effect any portfolio transactions for the Fund,
the commissions, fees or other remuneration received by the affiliated broker or
dealer must be reasonable and fair compared to the commissions, fees or other
remuneration paid to other brokers in connection with comparable transactions
involving similar securities being purchased or sold on an exchange during a
comparable period of time. This standard would allow the affiliated broker or
dealer to receive no more than the remuneration which would be expected 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 an affiliated broker or dealer
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 $126,948, $402,635, and $460,302, 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 an
affiliated broker or dealer. During the year ended February 28, 1997, the
brokerage commissions paid to DWR represented approximately 24.03% of the total
brokerage commissions paid by the Fund during the year and were paid on account
of transactions having a dollar value equal to approximately 25.69% 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 their 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 years ended February 28, 1995, February
29, 1996, and 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.
 
THE DISTRIBUTOR
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, shares of the Fund are distributed by Dean
Witter Distributors Inc. (the "Distributor"), on a continuous basis. 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 similar agreements with other selected
broker-dealers. The Distributor, a Delaware corporation, is a wholly-owned
subsidiary of MSDWD. The Directors who are not, and were not at the
 
                                       16
<PAGE>
time they voted, interested persons of the Fund, as defined in the Act (the
"Independent Directors"), approved, at their meeting held on June 30, 1997, the
current Distribution Agreement appointing the Distributor as exclusive
distributor of the Fund's shares and providing for the Distributor to bear
distribution expenses not borne by the Fund. By its terms, the Distribution
Agreement had an initial term ending April 30, 1998, and provides that it will
remain in effect from year to year thereafter if approved by the Board.
 
    The Distributor bears all expenses it may incur in providing services under
the Distribution Agreement. Such expenses include the payment of commissions for
sales of the Fund's shares and incentive compensation to account executives. The
Distributor also pays certain expenses in connection with the distribution of
the Fund's shares, including the costs of preparing, printing and distributing
advertising or promotional materials, and the costs of printing and distributing
prospectuses and supplements thereto used in connection with the offering and
sale of the Fund's shares. The Fund bears the costs of initial typesetting,
printing and distribution of prospectuses and supplements thereto to
shareholders. The Fund also bears the costs of registering the Fund and its
shares under federal and state securities laws and pay filing fees in accordance
with state securities laws. The Fund and the Distributor have agreed to
indemnify each other against certain liabilities, including liabilities under
the Securities Act of 1933, as amended. Under the Distribution Agreement, the
Distributor uses its best efforts in rendering services to the Fund, but in the
absence of willful misfeasance, bad faith, gross negligence or reckless
disregard of its obligations, the Distributor is not liable to the Fund or any
of its shareholders for any error of 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 each Class, other than Class D, pays the
Distributor compensation accrued daily and payable monthly at the following
annual rates: 0.25% and 1.0% of the average daily net assets of Class A and
Class C, respectively, and, with respect to Class B, 1.0% of the lesser of: (a)
the average daily aggregate gross sales of the Fund's Class B shares since the
inception of the 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 Class B shares redeemed since the Plan's inception upon
which a CDSC has been imposed or upon which such charge has been waived, or (b)
the average daily net assets of Class B attributable to Class B shares issued,
net of Class B shares redeemed, since the inception of the Plan. The Distributor
also receives the proceeds of front-end sales charges and of contingent deferred
sales charges imposed on certain redemptions of shares, which are separate and
apart from payments made pursuant to the Plan (see "Purchase of Fund Shares" in
the Prospectus). The Distributor has informed the Fund that it and/or DWR
received approximately $9,850,627, $9,444,839 and $9,636,045 in contingent
deferred sales charges for the fiscal years ended February 28, 1995, February
29, 1996 and February 28,1997, respectively.
 
    The Distributor has informed the Fund that the entire fee payable by Class A
and a portion of the fees payable by each of Class B and Class C each year
pursuant to the Plan equal to 0.25% of such Class's average daily net assets are
currently each characterized as a "service fee" under the Rules of the
Association of the National Association of Securities Dealers, Inc. (of which
the Distributor is a member). The "service fee" is a payment made for personal
service and/or the maintenance of shareholder accounts. The remaining portion of
the Plan fees payable by a Class, if any, is characterized as an "asset-based
sales charge" as such is defined by the aforementioned Rules of the Association.
 
    The Plan was adopted by a majority vote of the Board of Directors, including
all of the Directors of the Fund who are not "interested persons" of the Fund
(as defined in the Act) and who have no direct or indirect financial interest in
the operation of the Plan (the "Independent 12b-1 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
voting securities of the Fund at the Annual Meeting of Shareholders of the Fund
held on June 22, 1984.
 
                                       17
<PAGE>
    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 an internal reorganization the share distribution activities
theretofore performed for the Fund by DWR were assumed by the Distributor and
DWR's sales activities are now being performed pursuant to the terms of a
selected dealer agreement between the Distributor and DWR. The amendments
provide that payments under the Plan will be made to the Distributor rather than
to DWR as before the amendment, and that the Distributor in turn is authorized
to make payments to DWR, its affiliates or other selected broker-dealers (or
direct that the Fund pay such entities directly). The Distributor is also
authorized to retain part of such fee as compensation for its own distribution-
related expenses. At their meeting held on April 28, 1993, the Directors,
including a majority of the Independent 12b-1 Directors, approved certain
technical amendments to the Plan in connection with amendments adopted by the
National Association of Securities Dealers, Inc. to its Rules of the
Association. At their meeting held on October 26, 1995, the 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. At their meeting held on June 30, 1997, the Directors,
including a majority of the Independent 12b-1 Directors, approved amendments to
the Plan to reflect the multiple-class structure for the Fund, which took effect
on July 28, 1997.
 
    Under the Plan and as required by Rule 12b-1, the Directors receive and
review promptly after the end of each calendar quarter a written report provided
by the Distributor of the amounts expended under the Plan and the purpose for
which such expenditures were made. The Fund accrued amounts payable to the
Distributor under the Plan, during the fiscal year ended February 28, 1997, of
$81,976,079. This amount is equal to 0.74% of the Fund's average daily net
assets for the fiscal year and was calculated pursuant to clause (a) of the
compensation formula under the Plan. This amount is treated by the Fund as an
expense in the year it is accrued. This amount represents amounts paid by Class
B only; there were no Class A or Class C shares outstanding on such date.
 
    The Plan was adopted in order to permit the implementation of the Fund's
method of distribution. Under this distribution method the Fund offers four
Classes of shares, each with a different distribution arrangement as set forth
in the Prospectus.
 
    With respect to Class A shares, DWR compensates its account executives by
paying them, from proceeds of the front-end sales charge, commissions for the
sale of Class A shares, currently a gross sales credit of up to 5.0% of the
amount sold (except as provided in the following sentence) and an annual
residual commission, currently a residual of up to 0.25% of the current value of
the respective accounts for which they are the account executives or dealers of
record in all cases. On orders of $1 million or more (for which no sales charge
was paid) or net asset value purchases by 401(k) plans or other
employer-sponsored plans qualified under Section 401(a) of the Internal Revenue
Code for which Dean Witter Trust Company ("DWTC") or Dean Witter Trust FSB
("DWTFSB") serves as Trustee or the 401(k) Support Services Group of DWR serves
as recordkeeper, the Investment Manager compensates DWR's account executives by
paying them, from its own funds, a gross sales credit of 1.0% of the amount
sold.
 
    With respect to Class B shares, DWR compensates its account executives by
paying them, from its own funds, commissions for the sale of Class B shares,
currently a gross sales credit of up to 5.0% of the amount sold (except as
provided in the following sentence) and an annual residual commission, currently
a residual of up to 0.25% of the current value (not including reinvested
dividends or distributions) of the amount sold in all cases. In the case of
retirement plans qualified under Section 401(k) of the Internal Revenue Code and
other employer-sponsored plans qualified under Section 401(a) of the Internal
Revenue Code for which DWTC or DWTFSB serves as Trustee or the 401(k) Support
Services Group of DWR serves as recordkeeper, and which plans are opened on or
after July 28, 1997, DWR compensates its account executives by paying them, from
its own funds, a gross sales credit of 3.0% of the amount sold.
 
                                       18
<PAGE>
    With respect to Class C shares, DWR compensates its account executives by
paying them, from its own funds, commissions for the sale of Class C shares,
currently a gross sales credit of up to 1.0% of the amount sold and an annual
residual commission, currently a residual of up to 1.0% of the current value of
the respective accounts for which they are the account executives of record.
 
    With respect to Class D shares other than shares held by participants in
InterCapital's mutual fund asset allocation program, the Investment Manager
compensates DWR's account executives by paying them, from its own funds,
commissions for the sale of Class D shares, currently a gross sales credit of up
to 1.0% of the amount sold. There is a chargeback of 100% of the amount paid if
the Class D shares are redeemed in the first year and a chargeback of 50% of the
amount paid if the Class D shares are redeemed in the second year after
purchase. The Investment Manager also compensates DWR's account executives by
paying them, from its own funds, an annual residual commission, currently a
residual of up to 0.10% of the current value of the respective accounts for
which they are the account executives of record (not including accounts of
participants in the InterCapital mutual fund asset allocation program).
 
    The gross sales credit is a charge which reflects commissions paid by DWR to
its account executives and DWR's Fund-associated distribution-related expenses,
including sales compensation, and overhead and other branch office
distribution-related expenses including (a) the expenses of operating DWR's
branch offices in connection with the sale of Fund shares, including lease
costs, the salaries and employee benefits of operations and sales support
personnel, utility costs, communications costs and the costs of stationery and
supplies, (b) the costs of client sales seminars, (c) travel expenses of mutual
fund sales coordinators to promote the sale of Fund shares and (d) other
expenses relating to branch promotion of Fund sales. The distribution fee that
the Distributor receives from the Fund under the Plan, in effect, offsets
distribution expenses incurred under the Plan on behalf of the Fund and, in the
case of Class B shares, opportunity costs, such as the gross sales credit and an
assumed interest charge thereon ("carrying charge"). In the Distributor's
reporting of the distribution expenses to the Fund, in the case of Class B
shares, such assumed interest (computed at the "broker's call rate") has been
calculated on the gross credit as it is reduced by amounts received by the
Distributor under the Plan and any contingent deferred sales charges received by
the Distributor upon redemption of shares of the Fund. No other interest charge
is included as a distribution expense in the Distributor's calculation of its
distribution costs for this purpose. The broker's call rate is the interest rate
charged to securities brokers on loans secured by exchange-listed securities.
 
    The Fund paid 100% of the $81,976,079 accrued under the Plan for the fiscal
year ended February 28, 1997 to the Distributor and DWR. DWR and the Distributor
estimate that they spent, pursuant to the Plan, $700,428,623 on behalf of the
Fund from the inception of the Plan through February 28, 1997. It is estimated
that this amount was spent in approximately the following ways: (i) 1.40%
($9,824,157) -- advertising and promotional expenses; (ii) 0.16% ($1,134,768) --
printing of prospectuses for distribution to other than current shareholders;
and (iii) 98.44% ($689,469,698) -- other expenses, including the gross sales
credit and the carrying charge, of which 10.26% ($70,718,297) represents
carrying charges, 36.01% ($248,304,937) represents commission credits to DWR
branch offices for payments of commissions to account executives and 53.73%
($370,446,464) represents overhead and other branch office distribution-related
expenses. These amounts represent amounts paid by Class B only; there were no
Class A or Class C shares outstanding on such date.
 
    The Fund is authorized to reimburse expenses incurred or to be incurred in
promoting the distribution of the Fund's Class A and Class C shares and in
servicing shareholder accounts. Reimbursement will be made through payments at
the end of each month. The amount of each monthly payment may in no event exceed
an amount equal to a payment at the annual rate of 0.25%, in the case of Class
A, and 1.0%, in the case of Class C, of the average net assets of the respective
Class during the month. No interest or other financing charges, if any, incurred
on any distribution expenses on behalf of Class A and Class C will be
reimbursable under the Plan. With respect to Class A, in the case of all
expenses other than expenses representing the service fee, and, with respect to
Class C, in the case of all expenses other than expenses representing a gross
sales credit or a residual to account executives, such amounts
 
                                       19
<PAGE>
shall be determined at the beginning of each calendar quarter by the Directors,
including a majority of the Independent 12b-1 Directors. Expenses representing
the service fee (for Class A) or a gross sales credit or a residual to account
executives (for Class C) may be reimbursed without prior determination. In the
event that the Distributor proposes that monies shall be reimbursed for other
than such expenses, then in making quarterly determinations of the amounts that
may be reimbursed by the Fund, the Distributor will provide and the Directors
will review a quarterly budget of projected distribution expenses to be incurred
on behalf of the Fund, together with a report explaining the purposes and
anticipated benefits of incurring such expenses. The Directors will determine
which particular expenses, and the portions thereof, that may be borne by the
Fund, and in making such a determination shall consider the scope of the
Distributor's commitment to promoting the distribution of the Fund's Class A and
Class C shares.
 
    At any given time, the expenses of distributing shares of the Fund may be
more or less than the total of (i) the payments made by the Fund pursuant to the
Plan and (ii) the proceeds of contingent deferred sales charges paid by
investors upon redemption of shares. The Distributor has advised the Fund that
in the case of Class B shares the excess distribution expenses, including the
carrying charge designed to approximate the opportunity costs incurred by DWR
which arise from it having advanced monies without having received the amount of
any sales charges imposed at the time of sale of the Fund's Class B shares,
totalled $221,826,761 as of February 28, 1997. Because there is no requirement
under the Plan that the Distributor be reimbursed for all distribution expenses
with respect to Class B shares or any requirement that the Plan be continued
from year to year, this excess amount does not constitute a liability of the
Fund. Although there is no legal obligation for the Fund to pay expenses
incurred in excess of payments made to the Distributor under the Plan and the
proceeds of contingent deferred sales charges paid by investors upon redemption
of shares, if for any reason the Plan is terminated, the 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.
 
    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, has any direct financial
interest in the operation of the Plan except to the extent that the Distributor,
InterCapital, DWR, DWSC or certain of their employees may be deemed to have such
an interest as a result of benefits derived from the successful operation of the
Plan or as a result of receiving a portion of the amounts expended thereunder by
the Fund.
 
    Under its terms, the Plan had an initial term ending December 31, 1984 and
will continue from year to year thereafter, provided such continuance is
approved annually by a vote of the Directors in the manner described above.
Prior to the Board's approval of amendments to the Plan to reflect the multiple-
class structure for the Fund, the most recent continuance of the Plan for one
year, until April 30, 1998, was approved by the Board of Directors of the Fund,
including a majority of the Independent 12b-1 Directors, at a Board meeting held
on April 24, 1997. Prior to approving the continuation of the Plan, the
Directors requested and received from the Distributor and reviewed all the
information which they deemed necessary to arrive at an informed determination.
In making their determination to continue the Plan, the 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 to the Fund and its shareholders. 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 by the shareholders of the
affected Class or Classes of the Fund, and all material amendments to 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
 
                                       20
<PAGE>
the Independent 12b-1 Directors 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 12b-1 Directors shall be
committed to the discretion of the Independent 12b-1 Directors.
 
DETERMINATION OF NET ASSET VALUE
 
    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 Board of Directors determines 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. Other short-term debt securities will
be valued on a mark-to-market basis until such time as they reach a remaining
maturity of sixty days, whereupon they will be valued at amortized cost using
their value on the 61st day unless the 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 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.
 
    The net asset value per share for each Class of shares of the Fund is
determined once daily at 4:00 p.m. New York time (or, on days when the New York
Stock Exchange closes prior to 4 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, President's Day, Reverend Dr.
Martin Luther King, Jr. Day, Good Friday, Memorial Day, Independence Day, Labor
Day, Thanksgiving Day, and Christmas Day.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund offers four Classes of shares as
follows:
 
INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES
 
    Class A shares are sold to investors with an initial sales charge that
declines to zero for larger purchases; however, Class A shares sold without an
initial sales charge are subject to a contingent deferred sales charge ("CDSC")
of 1.0% if redeemed within one year of purchase, except in the circumstances
discussed in the Prospectus.
 
    RIGHT OF ACCUMULATION.  As discussed in the Prospectus, investors may
combine the current value of shares purchased in separate transactions for
purposes of benefitting from the reduced sales charges available for purchases
of shares of the Fund totalling at least $25,000 in net asset value. For
example, if any person or entity who qualifies for this privilege holds Class A
shares of the Fund and/or other Dean Witter Funds that are multiple class funds
("Dean Witter Multi-Class Funds") or shares of other Dean Witter Funds sold with
a front-end sales charge purchased at a price including a front-end sales charge
having a current value of $5,000, and purchases $20,000 of additional shares of
the Fund, the sales charge applicable to the $20,000 purchase would be 4.75% of
the offering price.
 
    The Distributor must be notified by the selected broker-dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the selected broker-dealer or shareholder when such
an order is placed by mail. The reduced sales charge will not be granted if: (a)
such notification is not furnished at the time of the order; or (b) a review of
the records of the Distributor or Dean Witter Trust Company (the "Transfer
Agent") fails to confirm the investor's represented holdings.
 
                                       21
<PAGE>
    LETTER OF INTENT.  As discussed in the Prospectus, reduced sales charges are
available to investors who enter into a written Letter of Intent providing for
the purchase, within a thirteen-month period, of Class A shares of the Fund from
the Distributor or from a single Selected Broker-Dealer.
 
    A Letter of Intent permits an investor to establish a total investment goal
to be achieved by any number of purchases over a thirteen-month period. Each
purchase of Class A shares made during the period will receive the reduced sales
commission applicable to the amount represented by the goal, as if it were a
single purchase. A number of shares equal in value to 5% of the dollar amount of
the Letter of Intent will be held in escrow by the Transfer Agent, in the name
of the shareholder. The initial purchase under a Letter of Intent must be equal
to at least 5% of the stated investment goal.
 
    The Letter of Intent does not obligate the investor to purchase, nor the
Fund to sell, the indicated amount. In the event the Letter of Intent goal is
not achieved within the thirteen-month period, the investor is required to pay
the difference between the sales charge otherwise applicable to the purchases
made during this period and sales charges actually paid. Such payment may be
made directly to the Distributor or, if not paid, the Distributor is authorized
by the shareholder to liquidate a sufficient number of his or her escrowed
shares to obtain such difference.
 
    If the goal is exceeded and purchases pass the next sales charge level, the
sales charge on the entire amount of the purchase that results in passing that
level and on subsequent purchases will be subject to further reduced sales
charges in the same manner as set forth above under "Right of Accumulation," but
there will be no retroactive reduction of sales charges on previous purchases.
For the purpose of determining whether the investor is entitled to a further
reduced sales charge applicable to purchases at or above a sales charge level
which exceeds the stated goal of a Letter of Intent, the cumulative current net
asset value of any shares owned by the investor in any other Dean Witter Funds
held by the shareholder which were previously purchased at a price including a
front-end sales charge (including shares of the Fund and other Dean Witter Funds
acquired in exchange for those shares, and including in each case shares
acquired through reinvestment of dividends and distributions) will be added to
the cost or net asset value of shares of the Fund owned by the investor.
However, shares of "Exchange Funds" (see "Shareholder Services--Exchange
Privilege") and the purchase of shares of other Dean Witter Funds will not be
included in determining whether the stated goal of a Letter of Intent has been
reached.
 
    At any time while a Letter of Intent is in effect, a shareholder may, by
written notice to the Distributor, increase the amount of the stated goal. In
that event, only shares purchased during the previous 90-day period and still
owned by the shareholder will be included in the new sales charge reduction. The
5% escrow and minimum purchase requirements will be applicable to the new stated
goal. Investors electing to purchase shares of the Fund pursuant to a Letter of
Intent should carefully read such Letter of Intent.
 
CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--CLASS B SHARES
 
    Class B shares are sold without an initial sales charge but are subject to a
CDSC payable upon most redemptions within six years after purchase. As stated in
the Prospectus, a CDSC will be imposed on any redemption by an investor if after
such redemption the current value of the investor's Class B shares of the Fund
is less than the dollar amount of all payments by the shareholder for the
purchase of Class B shares during the preceding six years (or, in the case of
shares held by certain employer-sponsored benefit plans, three years). However,
no CDSC will be imposed to the extent that the net asset value of the shares
redeemed does not exceed: (a) the current net asset value of shares purchased
more than six years (or, in the case of shares held by certain
employer-sponsored benefit plans, three years) prior to the redemption, plus (b)
the current net asset value of shares purchased through reinvestment of
dividends or distributions of the Fund or another Dean Witter Fund (see
"Shareholder Services-- Targeted Dividends"), plus (c) the current net asset
value of shares acquired in exchange for (i) shares of Dean Witter front-end
sales charge funds, or (ii) shares of other Dean Witter Funds for which shares
of front-end sales charge funds have been exchanged (see "Shareholder
Services--Exchange Privilege"), plus (d) increases in the net asset value of the
investor's shares above the total amount of payments for
 
                                       22
<PAGE>
the purchase of Fund shares made during the preceding six (three) years. The
CDSC will be paid to the Distributor. In addition, no CDSC will be imposed on
redemptions of shares which are attributable to reinvestment of dividends or
distributions from, or the proceeds of, certain Unit Investment Trusts.
 
    In determining the applicability of the CDSC to each redemption, the amount
which represents an increase in the net asset value of the investor's shares
above the amount of the total payments for the purchase of shares within the
last six years (or, in the case of shares held by certain employer-sponsored
benefit plans, three years) will be redeemed first. In the event the redemption
amount exceeds such increase in value, the next portion of the amount redeemed
will be the amount which represents the net asset value of the investor's shares
purchased more than six (three) years prior to the redemption and/or shares
purchased through reinvestment of dividends or distributions and/or shares
acquired in exchange for shares of Dean Witter front-end sales charge funds, or
for shares of other Dean Witter funds for which shares of front-end sales charge
funds have been exchanged. A portion of the amount redeemed which exceeds an
amount which represents both such increase in value and the value of shares
purchased more than six years (or, in the case of shares held by certain
employer-sponsored benefit plans, three years) prior to the redemption and/or
shares purchased through reinvestment of dividends or distributions and/or
shares acquired in the above-described exchanges will be subject to a CDSC.
 
    The amount of the CDSC, if any, will vary depending on the number of years
from the time of payment for the purchase of Class B shares of the Fund until
the time of redemption of such shares. For purposes of determining the number of
years from the time of any payment for the purchase of shares, all payments made
during a month will be aggregated and deemed to have been made on the last day
of the month. The following table sets forth the rates of the CDSC applicable to
most Class B shares of the Fund:
 
<TABLE>
<CAPTION>
                                        YEAR SINCE
                                         PURCHASE                                            CDSC AS A PERCENTAGE OF
                                       PAYMENT MADE                                              AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               5.0%
Second....................................................................................               4.0%
Third.....................................................................................               3.0%
Fourth....................................................................................               2.0%
Fifth.....................................................................................               2.0%
Sixth.....................................................................................               1.0%
Seventh and thereafter....................................................................             None
</TABLE>
 
    The following table sets forth the rates of the CDSC applicable to Class B
shares of the Fund held by 401(k) plans or other employer-sponsored plans
qualified under Section 401(a) of the Internal Revenue Code for which DWTC or
DWTFSB serves as Trustee or the 401(k) Support Services Group of DWR serves as
recordkeeper and whose accounts are opened on or after July 28, 1997:
 
<TABLE>
<CAPTION>
                                        YEAR SINCE
                                         PURCHASE                                            CDSC AS A PERCENTAGE OF
                                       PAYMENT MADE                                              AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               2.0%
Second....................................................................................               2.0%
Third.....................................................................................               1.0%
Fourth and thereafter.....................................................................             None
</TABLE>
 
    In determining the rate of the CDSC, it will be assumed that a redemption is
made of shares held by the investor for the longest period of time within the
applicable six-year or three-year period. This will result in any such CDSC
being imposed at the lowest possible rate. The CDSC will be imposed, in
accordance with the table shown above, on any redemptions within six years (or,
in the case of shares held by certain employer-sponsored benefit plans, three
years) of purchase which are in excess of these amounts and which redemptions do
not qualify for waiver of the CDSC, as described in the Prospectus.
 
                                       23
<PAGE>
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class C shares are sold without a sales charge but are subject to a CDSC of
1.0% on most redemptions made within one year after purchase, except in the
circumstances discussed in the Prospectus.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
    Class D shares are offered without any sales charge on purchase or
redemption. Class D shares are offered only to those persons meeting the
qualifications set forth in the Prospectus.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    Upon the purchase of shares of the Fund, a Shareholder Investment Account is
opened for the investor on the books of the Fund and maintained by the Transfer
Agent. This is an open account in which shares owned by the investor are
credited by the Transfer Agent in lieu of issuance of a 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 another
broker-dealer.
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  As stated in the
Prospectus, all income dividends and capital gains distributions are
automatically paid in full and fractional shares of the applicable Class of the
Fund, unless the shareholder requests that they be paid in cash. Each purchase
of shares of the Fund is made upon the condition that the Transfer Agent is
thereby automatically appointed as agent of the investor to receive all
dividends and capital gains distributions on shares owned by the investor. Such
dividends and distributions will be paid, at the net asset value per share, in
shares of the applicable Class of the Fund (or in cash if the shareholder so
requests) as of the close of business on the record date. At any time an
investor may request the Transfer Agent, in writing, to have subsequent
dividends and/or capital gains distributions paid to him or her in cash rather
than shares. To assure sufficient time to process the change, such request must
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, which
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 any Class of an open-end Dean Witter Fund
other than Dean Witter Dividend Growth Securities Inc. or in another Class of
Dean Witter Dividend Growth Securites Inc. Such investment will be made as
described above for automatic investment in shares of the applicable Class of
the Fund, at the net asset value per share of the selected Dean Witter Fund as
of the close of business on the payment date of the dividend or distribution and
will begin to earn dividends, if any, in the selected Dean Witter Fund the next
business day. To participate in the Targeted Dividends program, shareholders
should contact their DWR or other selected broker-dealer account executive or
the Transfer Agent. Shareholders of Dean Witter Dividend Growth Securities Inc.
must be shareholders of the selected Class of the Dean Witter Fund targeted to
receive investments from dividends at the time they enter the Targeted Dividends
program. Investors should review the prospectus of the targeted Dean Witter Fund
before entering the program.
 
    EASYINVEST.-SM-  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account or following
redemption of shares of a Dean Witter money market fund, on a semi-monthly,
monthly or quarterly basis, to the Transfer Agent for investment in shares of
the Fund. Shares purchased through EasyInvest will be added to the shareholder's
existing account at the net asset value calculated
 
                                       24
<PAGE>
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.  As discussed in
the Prospectus, any shareholder who receives a cash payment representing a
dividend or capital gains distribution may invest such dividend or distribution
in shares of the applicable Class at net asset value, without the imposition of
a CDSC upon redemption, by returning the check or the proceeds to the Transfer
Agent within 30 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 the proceeds by the
Transfer Agent.
 
    SYSTEMATIC WITHDRAWAL PLAN.  As discussed in the Prospectus, a systematic
withdrawal plan (the "Withdrawal Plan") is available for shareholders who own or
purchase shares of the Fund having a minimum value of $10,000 based upon the
then current net asset value. The Withdrawal Plan provides for monthly or
quarterly (March, June, September and December) checks in any amount, not less
than $25, or in any whole percentage of the account balance, on an annualized
basis. Any applicable CDSC will be imposed on shares redeemed under the
Withdrawal Plan (see "Purchase of Fund Shares" 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
CDSC) to the shareholder will be the designated monthly or quarterly amount.
 
    Withdrawal Plan payments should not be considered as dividends, yields or
income, If periodic withdrawal plan payments continuously exceed net investment
income and net capital gains, the shareholder's original investment will be
correspondingly reduced and ultimately exhausted.
 
    Each withdrawal constitutes a redemption of shares and any gain or loss
realized must be recognized for Federal income tax purposes. 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 sales charges which may be applicable
to purchases or redemptions of shares (see "Purchase of Fund Shares").
 
    The Transfer Agent acts as agent for the shareholder in tendering to the
Fund for redemption sufficient full and fractional shares to provide the amount
of the periodic withdrawal payment designated in the application. The shares
will be redeemed at their net asset value determined, at the shareholder's
option, on the tenth or twenty-fifth day (or next following business day) of the
relevant month or quarter and normally a check for the proceeds will be mailed
by the Transfer Agent, or amounts credited to a shareholder's DWR brokerage
account, within five business days after the date of redemption. The Withdrawal
Plan may be terminated at any time by the Fund.
 
    Any shareholder who wishes to have payments under the Withdrawal Plan made
to a third party, or sent to an address other than the one listed on the
account, must send complete written instructions to the Transfer Agent to enroll
in the Withdrawal Plan. The shareholder's signature on such instructions must be
guaranteed by an eligible guarantor acceptable to the Transfer Agent
(shareholders should contact the Transfer Agent for a determination as to
whether a particular institution is such an eligible guarantor). A shareholder
may, at any time, change the amount and interval of withdrawal payments through
his or her account executive or by written notification to the Transfer Agent.
In addition, the party and/or the address to which checks are mailed may be
changed by written notification to the Transfer Agent, with signature guarantees
required in the manner described above. The shareholder may also terminate the
Withdrawal Plan at any time by written notice to the Transfer Agent. In the
event of such termination, the account will be continued as a regular
shareholder investment account. The shareholder may also redeem all or part of
the shares held in the Withdrawal Plan account (see "Redemptions and
Repurchases" in the Prospectus) at any time.
 
                                       25
<PAGE>
    DIRECT INVESTMENTS THROUGH TRANSFER AGENT.  As discussed in the Prospectus,
shareholders may make additional investments in any Class of shares of the Fund
for which they qualify at any time by sending a check in any amount, not less
than $100, payable to Dean Witter Dividend Growth Securities Inc., and
indicating the selected Class, directly to the Fund's Transfer Agent. In the
case of Class A shares, after deduction of any applicable sales charge, the
balance will be applied to the purchase of Fund shares, and, in the case of
shares of the other Classes, the entire amount will be applied to the purchase
of Fund shares, at the net asset value per share next computed after receipt of
the check or purchase payment by the Transfer Agent. The shares so purchased
will be credited to the investor's account.
 
EXCHANGE PRIVILEGE
 
    As discussed in the Prospectus, the Fund makes available to its shareholders
an Exchange Privilege whereby shareholders of each Class of shares of the Fund
may exchange their shares for shares of the same Class of shares of any other
Dean Witter Multi-Class Fund without the imposition of any exchange fee. Shares
may also be exchanged for shares of any of the following funds: Dean Witter
Short-Term U.S. Treasury Trust, Dean Witter Limited Term Municipal Trust, Dean
Witter Short-Term Bond Fund, Dean Witter Intermediate Term U.S. Treasury Trust
and five Dean Witter Funds which are money market funds (the foregoing nine
funds are hereinafter referred to as the "Exchange Funds"). Class A shares may
also be exchanged for shares of Dean Witter Multi-State Municipal Series Trust
and Dean Witter Hawaii Municipal Trust, which are Dean Witter Funds sold with a
front-end sales charge ("FSC Funds"). Class B shares may also be exchanged for
shares of Dean Witter Global Short-Term Income Fund Inc., Dean Witter High
Income Securities and Dean Witter National Municipal Trust, which are Dean
Witter Funds offered with a CDSC ("CDSC Funds"). Exchanges may be made after the
shares of the Fund acquired by purchase (not by exchange or dividend
reinvestment) have been held for thirty days. There is no waiting period for
exchanges of shares acquired by exchange or dividend reinvestment. An exchange
will be treated for federal income tax purposes the same as a repurchase or
redemption of shares, on which the shareholder may realize a capital gain or
loss.
 
    Any new account established through the Exchange Privilege will have the
same registration and cash dividend or dividend reinvestment plan as the present
account, unless the Transfer Agent receives written notification to the
contrary. For telephone exchanges, the exact registration of the existing
account and the account number must be provided.
 
    Any shares held in certificate form cannot be exchanged but must be
forwarded to the Transfer Agent and deposited into the shareholder's account
before being eligible for exchange. (Certificates mailed in for deposit should
not be endorsed.)
 
    As described below, and in the Prospectus under the caption "Purchase of
Fund Shares," a CDSC may be imposed upon a redemption, depending on a number of
factors, including the number of years from the time of purchase until the time
of redemption or exchange ("holding period"). When shares of a Dean Witter
Multi-Class Fund or any 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 a Dean Witter Multi-Class Fund or
in a CDSC Fund. However, in the case of shares exchanged into an Exchange Fund
on or after April 23, 1990, upon a redemption of shares which results in a CDSC
being imposed, a credit (not to exceed the amount of the CDSC) will be given in
an amount equal to the Exchange Fund 12b-1 distribution fees incurred on or
after that date which are attributable to those shares. Shareholders acquiring
shares of an Exchange Fund pursuant to this exchange privilege may exchange
those shares back into a Dean Witter Multi-Class Fund or a CDSC 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
 
                                       26
<PAGE>
which shares of a Dean Witter Multi-Class Fund or 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 Dean Witter
Multi-Class Fund or in a CDSC Fund. In the case of exchanges of Class A shares
which are subject to a CDSC, the holding period also includes the time
(calculated as described above) the shareholder was invested in a FSC Fund.
 
    When shares initially purchased in a Dean Witter Multi-Class Fund or in a
CDSC Fund are exchanged for shares of a Dean Witter Multi-Class Fund, shares of
a CDSC Fund, shares of a FSC Fund, or shares of an Exchange Fund, the date of
purchase of the shares of the fund exchanged into, for purposes of the CDSC upon
redemption, will be the last day of the month in which the shares being
exchanged were originally purchased. In allocating the purchase payments between
funds for purposes of the CDSC, the amount which represents the current net
asset value of shares at the time of the exchange which were (i) purchased more
than one, three or six years (depending on the CDSC schedule applicable to the
shares) prior to the exchange, (ii) originally acquired through reinvestment of
dividends or distributions and (iii) acquired in exchange for shares of FSC
Funds, or for shares of other Dean Witter Funds for which shares of FSC Funds
have been exchanged (all such shares called "Free Shares"), will be exchanged
first. After an exchange, all dividends earned on shares in an Exchange Fund
will be considered Free Shares. If the exchanged amount exceeds the value of
such Free Shares, an exchange is made, on a block-by-block basis, of non-Free
Shares held for the longest period of time (except that, with respect to Class B
shares, if shares held for identical periods of time but subject to different
CDSC schedules are held in the same Exchange Privilege account, the shares of
that block that are subject to a lower CDSC rate will be exchanged prior to the
shares of that block that are subject to a higher CDSC rate). Shares equal to
any appreciation in the value of non-Free Shares exchanged will be treated as
Free Shares, and the amount of the purchase payments for the non-Free Shares of
the fund exchanged into will be equal to the lesser of (a) the purchase payments
for, or (b) the current net asset value of, the exchanged non-Free Shares. If an
exchange between funds would result in exchange of only part of a particular
block of non-Free Shares, then shares equal to any appreciation in the value of
the block (up to the amount of the exchange) will be treated as Free Shares and
exchanged first, and the purchase payment for that block will be allocated on a
pro rata basis between the non-Free Shares of that block to be retained and the
non-Free Shares to be exchanged. The prorated amount of such purchase payment
attributable to the retained non-Free Shares will remain as the purchase payment
for such shares, and the amount of purchase payment for the exchanged non-Free
Shares will be equal to the lesser of (a) the prorated amount of the purchase
payment for, or (b) the current net asset value of, those exchanged non-Free
Shares. Based upon the procedures described in the Prospectus under the caption
"Purchase of Fund Shares," any applicable CDSC will be imposed upon the ultimate
redemption of shares of any fund, regardless of the number of exchanges since
those shares were originally purchased.
 
    With respect to the redemption or repurchase of shares of the Fund, the
application of proceeds to the purchase of new shares in the Fund or any other
of the funds and the general administration of the Exchange Privilege, the
Transfer Agent acts as agent for the Distributor and for the shareholder's
selected broker-dealer, if any, in the performance of such functions. With
respect to exchanges, redemptions or repurchases, the Transfer Agent shall be
liable for its own negligence and not for the default or negligence of its
correspondents or for losses in transit. The Fund shall not be liable for any
default or negligence of the Transfer Agent, the Distributor or any selected
broker-dealer.
 
    The Distributor and any selected broker-dealer have authorized and appointed
the Transfer Agent to act as their agent in connection with the application of
proceeds of any redemption of Fund shares to the purchase of shares of any other
fund and the general administration of the Exchange Privilege. No commission or
discounts will be paid to the Distributor or any selected broker-dealer for any
transactions pursuant to this Exchange Privilege.
 
    Exchanges are subject to the minimum investment requirement and any other
conditions imposed by each fund. (The minimum initial investment for the
Exchange Privilege account of each Class is $5,000 for Dean Witter Liquid Asset
Fund Inc., Dean Witter Tax-Free Daily Income Trust, Dean Witter
 
                                       27
<PAGE>
California Tax-Free Daily Income Trust and Dean Witter New York Municipal Money
Market Trust, although those funds may, in their discretion, accept initial
investments of as low as $1,000. The minimum initial investment for the Exchange
Privilege account of each Class is $10,000 for Dean Witter Short-Term U.S.
Treasury Trust, although that fund, in its discretion, may accept initial
purchases of as low as $5,000. The minimum initial investment for the Exchange
Privilege account of each Class is $5,000 for Dean Witter Special Value Fund.
The minimum initial investment for the Exchange Privilege account of each Class
of all other Dean Witter Funds for which the Exchange Privilege is available is
$1,000.) Upon exchange into an Exchange Fund, the shares of that fund will be
held in a special Exchange Privilege Account separately from accounts of those
shareholders who have acquired their shares directly from that fund. As a
result, certain services normally available to shareholders of those funds,
including the check writing feature, will not be available for funds held in
that account.
 
    The Fund and each of the other Dean Witter Funds may limit the number of
times this Exchange Privilege may be exercised by any investor within a
specified period of time. Also, the Exchange Privilege may be terminated or
revised at any time by the Fund and/or any of the Dean Witter funds for which
shares of the Fund have been exchanged, upon such notice as may be required by
applicable regulatory agencies (presently sixty days' prior written notice for
termination or material revision), provided that six months' prior written
notice of termination will be given to the shareholders who hold shares of
Exchange Funds pursuant to the Exchange Privilege, and provided further that the
Exchange Privilege may be terminated or materially revised without notice at
times (a) when the New York Stock Exchange is closed for other than customary
weekends and holidays, (b) when trading on that Exchange is restricted, (c) when
an emergency exists as a result of which disposal by the Fund of securities
owned by it is not reasonably practicable or it is not reasonably practicable
for the Fund fairly to determine the value of its net assets, (d) during any
other period when the Securities and Exchange Commission by order so permits
(provided that applicable rules and regulations of the Securities and Exchange
Commission shall govern as to whether the conditions prescribed in (b) or (c)
exist) or (e) if the Fund would be unable to invest amounts effectively in
accordance with its investment objective, policies and restrictions.
 
    For further information regarding the Exchange Privilege, shareholders
should contact their DWR or other selected broker-dealer account executive or
the Transfer Agent.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  As stated in the Prospectus, shares of each Class of the Fund
can be redeemed for cash at any time at the net asset value per share next
determined; however, such redemption proceeds will be reduced by the amount of
any applicable CDSC (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
 
                                       28
<PAGE>
corporation (other than the Distributor or a selected broker-dealer for the
account of the shareholder), partnership, trust or fiduciary, or sent to the
shareholder at an address other than the registered address, signatures must be
guaranteed by an eligible guarantor acceptable to the Transfer Agent
(shareholders should contact the Transfer Agent for a determination as to
whether a particular institution is such an eligible guarantor). A stock power
may be obtained from any dealer or commercial bank. The Fund may change the
signature guarantee requirements from time to time upon notice to shareholders,
which may be by means of a new prospectus.
 
    REPURCHASE.  As stated in the Prospectus, DWR and other selected
broker-dealers are authorized to repurchase shares represented by a share
certificate which is delivered to any of their offices. Shares held in a
shareholder's account without a share certificate may also be repurchased by DWR
and other selected broker-dealers upon the telephonic request of the
shareholder. The repurchase price is the net asset value next computed after
such purchase order is received by DWR or other selected broker-dealer reduced
by any applicable CDSC.
 
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment for shares of any Class presented for repurchase or redemption will be
made by check within seven days after receipt by the Transfer Agent of the
certificate and/or written request in good order. 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. Such
payment may be postponed or the right of redemption suspended at times (a) when
the New York Stock Exchange is closed for other than customary weekends and
holidays, (b) when trading on that Exchange is restricted, (c) when an emergency
exists as a result of which disposal by the Fund of securities owned by it is
not reasonably practicable or it is not reasonably practicable for the Fund
fairly to determine the value of its net assets, or (d) during any other period
when the Securities and Exchange Commission by order so permits; provided that
applicable rules and regulations of the Securities and Exchange Commission shall
govern as to whether the conditions prescribed in (b) or (c) exist. If the
shares to be redeemed have recently been purchased by check (including a
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 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
accounts.
 
    TRANSFERS OF SHARES.  In the event a shareholder requests a transfer of any
shares to a new registration, such shares will be transferred without sales
charge at the time of transfer. With regard to the status of shares which are
either subject to the CDSC or free of such charge (and with regard to the length
of time shares subject to the charge have been held), any transfer involving
less than all the shares in an account will be made on a pro rata basis (that
is, by transferring shares in the same proportion that the transferred shares
bear to the total shares in the account immediately prior to the transfer). The
transferred shares will continue to be subject to any applicable CDSC as if they
had not been so transferred.
 
    REINSTATEMENT PRIVILEGE.  As discussed in the Prospectus, a shareholder who
has had his or her shares redeemed or repurchased and has not previously
exercised this reinstatement privilege may within 35 days after the date of the
redemption or repurchase, reinstate any portion or all of the proceeds of such
redemption or repurchase in shares of the Fund in the same Class at the net
asset value next determined after a reinstatement request, together with the
proceeds, is received by the Transfer Agent.
 
    Exercise of the reinstatement privilege will not affect the federal income
tax 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.
 
                                       29
<PAGE>
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus under "Dividends, Distributions and Taxes,"
the Fund will determine either to distribute or to retain all or part of any net
long-term capital gains in any year for reinvestment. If any such gains are
retained, the Fund will pay federal income tax thereon, and shareholders will be
able to claim their share of the tax paid by the Fund as a credit against their
individual federal income tax.
 
    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.
 
    The Fund has qualified and intends to remain qualified as a regulated
investment company under Subchapter M of the Internal Revenue Code. If so
qualified, the Fund will not be subject to federal income tax on its net
investment income and net short-term capital gains, if any, realized during any
fiscal year to the extent that it distributes such income and capital gains to
its shareholders.
 
    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 distribution would be in part a return of capital but nonetheless
would be taxable to the shareholder. Therefore, an investor should consider the
tax implications of purchasing Fund shares immediately prior to a distribution
record date.
 
    Shareholders are urged to consult their attorneys or tax advisers regarding
specific questions as to federal, state or local taxes.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, from time to time the Fund may quote its
"total return" in advertisements and sales literature. These figures are
computed separately for Class A, Class B, Class C and Class D shares. The Fund's
"average annual total return" represents an annualization of the Fund's total
return over a particular period and is computed by finding the annual percentage
rate which will result in the ending redeemable value of a hypothetical $1,000
investment made at the beginning of a one, five or ten year period, or for the
period from the date of commencement of the Fund's operations, if shorter than
any of the foregoing. The ending redeemable value is reduced by any CDSC at the
end of the one, five or ten year or other period. For the purpose of this
calculation, it is assumed that all dividends and distributions are reinvested.
The formula for computing the average annual total return involves a percentage
obtained by dividing the ending redeemable value by the amount of the initial
investment, taking a root of the quotient (where the root is equivalent to the
number of years in the period) and subtracting 1 from the result. The average
annual total returns of the Fund for the one, five and ten year periods ended
February 28, 1997, were 16.37%, 14.12% and 12.74%, respectively. These returns
are for Class B only; there were no other Classes of shares outstanding on such
date.
 
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average,
year-by-year or other types of total return figures. Such calculations may or
may not reflect the imposition of the maximum front-end sales charge for Class A
or the deduction of the CDSC for each of Class B and Class C which, if
reflected, would reduce the performance quoted. For example, the average annual
total return of the Fund may be calculated in the manner described above, but
without deduction for any applicable sales charge. Based on this
 
                                       30
<PAGE>
calculation, the average annual total returns of the Fund for the one, five and
ten year periods ended February 28, 1997, were 21.37%, 14.35% and 12.74%,
respectively. These returns are for Class B only; there were no other Classes of
shares outstanding on such date.
 
    In addition, the Fund may compute its aggregate total return for each Class
for specified periods by determining the aggregate percentage rate which will
result in the ending value of a hypothetical $1,000 investment made at the
beginning of the period. For the purpose of this calculation, it is assumed that
all dividends and distributions are reinvested. The formula for computing
aggregate total return involves a percentage obtained by dividing the ending
value (without the reduction for any sales charge) by the initial $1,000
investment and subtracting 1 from the result. Based on the foregoing
calculation, the Fund's total return for the one, five and ten year periods
ended February 28, 1997, were 21.37%, 95.55% and 231.82%, respectively. These
returns are for Class B only; there were no other Classes of shares outstanding
on such date.
 
    The Fund may also advertise the growth of a hypothetical investment 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 $9,475, $48,000
and $97,000 in the case of Class A (investments of $10,000, $50,000 and $100,000
adjusted for the initial sales charge) or by $10,000, $50,000 and $100,000 in
the case of each of Class B, Class C and Class D, as the case may be.
Investments of $10,000, $50,000 and $100,000 in the Fund at inception would have
grown to $96,492, $482,460 and $964,920, respectively at February 28, 1997. This
information is for Class B only; there were no other Classes of shares
outstanding on such date.
 
    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 for each Class. Shares of the Fund, when issued, are fully paid,
non-assessable, fully transferrable 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
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 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 reinvesting dividends, processing account registration
changes, handling purchase and redemption transactions, mailing prospectuses and
reports, mailing
 
                                       31
<PAGE>
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 the 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 included in the 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.
 
                                       32
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997
<TABLE>
<CAPTION>
 NUMBER OF
  SHARES                                              VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             COMMON STOCKS (86.0%)
             AEROSPACE (4.2%)
 1,800,000   Lockheed Martin Corp............  $       159,300,000
 3,050,000   Raytheon Co.....................          143,731,250
 3,100,000   United Technologies Corp........          233,275,000
                                               -------------------
                                                       536,306,250
                                               -------------------
             ALUMINUM (2.1%)
 2,250,000   Alcan Aluminium Ltd. (Canada)...           80,718,750
 2,670,000   Aluminum Co. of America.........          190,237,500
                                               -------------------
                                                       270,956,250
                                               -------------------
             APPAREL (0.6%)
 1,100,000   VF Corp.........................           76,450,000
                                               -------------------
             AUTO PARTS (1.4%)
 2,000,000   Dana Corp.......................           62,000,000
 2,300,000   TRW, Inc........................          120,462,500
                                               -------------------
                                                       182,462,500
                                               -------------------
             AUTOMOTIVE (3.0%)
 3,600,000   Chrysler Corp...................          121,950,000
 3,850,000   Ford Motor Co...................          126,568,750
 2,400,000   General Motors Corp.............          138,900,000
                                               -------------------
                                                       387,418,750
                                               -------------------
             BANKS (5.9%)
 2,000,000   BankAmerica Corp................          227,500,000
 2,600,000   KeyCorp.........................          139,100,000
 1,500,000   Morgan (J.P.) & Co., Inc........          157,687,500
 3,850,000   NationsBank Corp................          230,518,750
                                               -------------------
                                                       754,806,250
                                               -------------------
             BEVERAGES - SOFT DRINKS (3.1%)
 3,900,000   Coca Cola Co....................          237,900,000
 5,000,000   PepsiCo Inc.....................          164,375,000
                                               -------------------
                                                       402,275,000
                                               -------------------
             CHEMICALS (5.0%)
 1,575,000   Dow Chemical Co.................          127,575,000
 1,950,000   Du Pont (E.I.) de Nemours & Co.,
               Inc...........................          209,137,500
 5,300,000   Monsanto Co.....................          192,787,500
 2,000,000   PPG Industries, Inc.............          112,000,000
                                               -------------------
                                                       641,500,000
                                               -------------------
             COAL (0.2%)
 1,000,000   MAPCO Inc.......................           31,750,000
                                               -------------------
             COMPUTERS (1.6%)
 1,400,000   International Business Machines
               Corp..........................          201,250,000
                                               -------------------
 
<CAPTION>
 NUMBER OF
  SHARES                                              VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             CONGLOMERATES (2.2%)
 1,950,000   Minnesota Mining & Manufacturing
               Co............................  $       179,400,000
   480,000   Newport News Shipbuilding
               Inc...........................            7,440,000
 2,600,000   Tenneco, Inc....................          102,375,000
                                               -------------------
                                                       289,215,000
                                               -------------------
             COSMETICS (3.7%)
 3,000,000   Avon Products, Inc..............          174,750,000
 2,900,000   Gillette Co.....................          229,462,500
 1,675,000   International Flavors &
               Fragrances Inc................           77,678,125
                                               -------------------
                                                       481,890,625
                                               -------------------
             DRUGS (8.0%)
 3,300,000   Abbott Laboratories.............          185,625,000
 3,200,000   American Home Products Corp.....          204,800,000
 1,675,000   Bristol-Myers Squibb Co.........          218,587,500
 2,775,000   Schering-Plough Corp............          212,634,375
 2,800,000   Smithkline Beecham PLC
               (ADR) (United Kingdom)........          207,900,000
                                               -------------------
                                                     1,029,546,875
                                               -------------------
             ELECTRIC - MAJOR (2.2%)
 1,900,000   General Electric Co.............          195,462,500
 5,400,000   Westinghouse Electric Corp......           93,150,000
                                               -------------------
                                                       288,612,500
                                               -------------------
             ENERGY (0.6%)
 1,200,000   Kerr-McGee Corp.................           75,150,000
                                               -------------------
             FINANCE (1.6%)
 1,000,000   Beneficial Corp.................           69,125,000
 1,360,000   Household International, Inc....          131,750,000
                                               -------------------
                                                       200,875,000
                                               -------------------
             FINANCIAL - MISCELLANEOUS (1.2%)
 3,800,400   Federal National Mortgage
               Assoc.........................          152,016,000
                                               -------------------
             FOODS (0.8%)
 3,000,000   Quaker Oats Company (The).......          107,625,000
                                               -------------------
             HOUSEHOLD APPLIANCES (0.6%)
 1,600,000   Whirlpool Corp..................           80,800,000
                                               -------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       33
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997, CONTINUED
<TABLE>
<CAPTION>
 NUMBER OF
  SHARES                                              VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             INSURANCE (2.1%)
 1,700,000   Aetna Inc.......................  $       140,887,500
 2,350,000   Lincoln National Corp...........          136,593,750
                                               -------------------
                                                       277,481,250
                                               -------------------
             MACHINERY - AGRICULTURAL (1.4%)
 4,150,000   Deere & Co......................          176,893,750
                                               -------------------
             MACHINERY - DIVERSIFIED (0.5%)
   800,000   Johnson Controls, Inc...........           67,400,000
                                               -------------------
             MANUFACTURING - DIVERSIFIED (1.2%)
 2,250,000   Honeywell, Inc..................          160,031,250
                                               -------------------
             METALS & MINING (0.9%)
 1,700,000   Phelps Dodge Corp...............          121,550,000
                                               -------------------
             NATURAL GAS (2.2%)
 2,300,000   Burlington Resources, Inc.......          100,912,500
   950,000   El Paso Natural Gas Co..........           50,943,750
 3,050,000   ENRON Corp......................          121,618,750
   800,000   NorAm Energy Corp...............           12,000,000
                                               -------------------
                                                       285,475,000
                                               -------------------
             OFFICE EQUIPMENT (2.7%)
 2,400,000   Pitney Bowes, Inc...............          149,100,000
 3,100,000   Xerox Corp......................          193,750,000
                                               -------------------
                                                       342,850,000
                                               -------------------
             OIL - DOMESTIC (3.2%)
 1,750,000   Amoco Corp......................          147,875,000
 1,000,000   Atlantic Richfield Co...........          125,000,000
 5,100,000   USX-Marathon Group..............          135,787,500
                                               -------------------
                                                       408,662,500
                                               -------------------
             OIL INTEGRATED - INTERNATIONAL (3.8%)
 1,675,000   Exxon Corp......................          167,290,625
 1,300,000   Mobil Corp......................          159,575,000
   975,000   Royal Dutch Petroleum Co. (ADR)
               (Netherlands).................          168,675,000
                                               -------------------
                                                       495,540,625
                                               -------------------
             PAPER & FOREST PRODUCTS (1.8%)
 2,750,000   International Paper Co..........          114,812,500
 2,500,000   Weyerhaeuser Co.................          115,625,000
                                               -------------------
                                                       230,437,500
                                               -------------------
 
<CAPTION>
 NUMBER OF
  SHARES                                              VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             PHOTOGRAPHY (1.5%)
 2,175,000   Eastman Kodak Co................  $       194,934,375
                                               -------------------
             RAILROADS (1.9%)
 1,575,000   Burlington Northern Santa Fe
               Corp..........................          131,118,750
 2,500,000   CSX Corp........................          115,312,500
                                               -------------------
                                                       246,431,250
                                               -------------------
             RETAIL (1.4%)
 4,350,000   Dayton-Hudson Corp..............          182,700,000
                                               -------------------
             RETAIL - DEPARTMENT STORES (0.9%)
 2,550,000   May Department Stores Co........          118,893,750
                                               -------------------
             SOAP & HOUSEHOLD PRODUCTS (1.7%)
 1,850,000   Procter & Gamble Co.............          222,231,250
                                               -------------------
             TELECOMMUNICATIONS (1.0%)
 3,550,000   U.S. West, Inc..................          127,800,000
                                               -------------------
             TELEPHONES (3.4%)
 1,800,000   Bell Atlantic Corp..............          124,425,000
 3,000,000   GTE Corp........................          140,250,000
 3,700,000   Sprint Corp.....................          168,350,000
                                               -------------------
                                                       433,025,000
                                               -------------------
             TIRE & RUBBER GOODS (0.9%)
 2,300,000   Goodyear Tire & Rubber Co.......          121,325,000
                                               -------------------
             TOBACCO (0.9%)
 3,600,000   UST, Inc........................          111,150,000
                                               -------------------
             UTILITIES - ELECTRIC (3.9%)
 2,425,000   FPL Group, Inc..................          110,337,500
 3,200,000   GPU, Inc........................          112,000,000
 4,500,000   Houston Industries, Inc.........          104,625,000
 3,450,000   PG & E Corp.....................           79,350,000
 4,100,000   Unicom Corp.....................           91,225,000
                                               -------------------
                                                       497,537,500
                                               -------------------
             UTILITIES - NATURAL GAS (0.7%)
 2,150,000   PanEnergy Corp..................           91,643,751
                                               -------------------
 
             TOTAL COMMON STOCKS
             (IDENTIFIED COST
             $5,607,105,045).................       11,104,899,751
                                               -------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       34
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
PORTFOLIO OF INVESTMENTS FEBRUARY 28, 1997, CONTINUED
 
<TABLE>
<CAPTION>
 PRINCIPAL
 AMOUNT IN
 THOUSANDS                                            VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             U.S. GOVERNMENT OBLIGATIONS (10.1%)
 $  50,000   U.S. Treasury Bond
               8.125% due 08/15/19...........  $        56,751,000
    90,000   U.S. Treasury Bond
               8.00% due 11/15/21............          101,232,900
    50,000   U.S. Treasury Bond
               7.125% due 02/15/23...........           51,160,500
   725,000   U.S. Treasury Bond
               6.25% due 08/15/23............          666,253,250
   450,000   U.S. Treasury Bond
               6.00% due 02/15/26............          399,879,000
    25,000   U.S. Treasury Note
               8.00% due 05/15/01............           26,504,250
                                               -------------------
 
             TOTAL U.S. GOVERNMENT
             OBLIGATIONS
             (IDENTIFIED COST
             $1,356,560,375).................        1,301,780,900
                                               -------------------
 
             SHORT-TERM INVESTMENTS (3.6%)
             COMMERCIAL PAPER (a) (2.0%)
             AUTOMOTIVE - FINANCE (0.4%)
    48,000   Ford Motor Credit Co. 5.30% due
               03/05/97......................           47,971,733
                                               -------------------
             BANKS - COMMERCIAL (1.1%)
    60,000   Canadian Imperial Holdings
               5.27% due 03/10/97............           59,920,950
    25,000   International Netherland (U.S.)
               Funding Corp. 5.25% due
               03/27/97......................           24,905,208
    50,000   National Australia Funding (DE)
               Inc. 5.25% due 03/13/97.......           49,912,500
                                               -------------------
                                                       134,738,658
                                               -------------------
             FINANCE - DIVERSIFIED (0.5%)
    64,900   General Electric Capital Corp.
               5.24% due 03/18/97 to
               03/20/97......................           64,727,793
                                               -------------------
 
             TOTAL COMMERCIAL PAPER
             (AMORTIZED COST $247,438,184)...          247,438,184
                                               -------------------
</TABLE>
 
<TABLE>
<CAPTION>
 PRINCIPAL
 AMOUNT IN
 THOUSANDS                                            VALUE
- ------------------------------------------------------------------
<C>          <S>                               <C>
             U.S. GOVERNMENT AGENCIES (a) (1.6%)
 $ 166,750   Federal Home Loan Banks 5.20% to
               5.30% due 03/03/97 to
               03/06/97......................  $       166,668,818
    45,000   Federal Home Loan Mortgage Corp.
               5.17% due 03/04/97............           44,980,613
                                               -------------------
 
             TOTAL U.S. GOVERNMENT AGENCIES
             (AMORTIZED COST $211,649,431)...          211,649,431
                                               -------------------
 
             REPURCHASE AGREEMENT (0.0%)
       174   The Bank of New York 5.25% due
               03/03/97 (dated 02/28/97;
               proceeds $173,706;
               collateralized by $180,735
               U.S. Treasury Note 6.25% due
               02/15/07 valued at $177,103)
               (Identified Cost $173,630)....              173,630
                                               -------------------
 
             TOTAL SHORT-TERM INVESTMENTS
             (IDENTIFIED COST
             $459,261,245)(B)................          459,261,245
                                               -------------------
 
TOTAL INVESTMENTS
(IDENTIFIED COST $7,422,926,665).........   99.7%   12,865,941,896
 
OTHER ASSETS IN EXCESS OF LIABILITIES....    0.3        40,836,839
                                           ------   --------------
 
NET ASSETS...............................  100.0%   $12,906,778,735
                                           ------   --------------
                                           ------   --------------
 
<FN>
- ---------------------
ADR  American Depository Receipt.
(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 $5,560,462,329 and
     the aggregate gross unrealized depreciation is $117,447,098, resulting in
     net unrealized appreciation of $5,443,015,231.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       35
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
FEBRUARY 28, 1997
 
<TABLE>
<S>                                                           <C>
ASSETS:
Investments in securities, at value
  (identified cost $7,422,926,665)..........................  $12,865,941,896
Receivable for:
    Dividends...............................................       39,023,358
    Capital stock sold......................................       22,887,818
    Interest................................................        5,785,454
Prepaid expenses and other assets...........................          298,800
                                                              ---------------
 
     TOTAL ASSETS...........................................   12,933,937,326
                                                              ---------------
 
LIABILITIES:
Payable for:
    Capital stock repurchased...............................        8,265,352
    Plan of distribution fee................................        6,979,049
    Investments purchased...................................        6,795,390
    Investment management fee...............................        3,740,373
Accrued expenses............................................        1,378,427
                                                              ---------------
 
     TOTAL LIABILITIES......................................       27,158,591
                                                              ---------------
 
NET ASSETS:
Paid-in-capital.............................................    7,274,485,939
Net unrealized appreciation.................................    5,443,015,231
Accumulated undistributed net investment income.............       48,981,789
Accumulated undistributed net realized gain.................      140,295,776
                                                              ---------------
 
     NET ASSETS.............................................  $12,906,778,735
                                                              ---------------
                                                              ---------------
 
NET ASSET VALUE PER SHARE,
  276,991,826 SHARES OUTSTANDING (500,000,000 SHARES
  AUTHORIZED OF $.01 PAR VALUE).............................
                                                                       $46.60
                                                              ---------------
                                                              ---------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       36
<PAGE>
DEAN WITTER DIVIDEND GROWTH 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 $1,375,521 foreign withholding tax).......  $  258,871,991
Interest....................................................      93,505,631
                                                              --------------
 
     TOTAL INCOME...........................................     352,377,622
                                                              --------------
 
EXPENSES
Plan of distribution fee....................................      81,976,079
Investment management fee...................................      43,410,540
Transfer agent fees and expenses............................       8,533,374
Registration fees...........................................         505,137
Custodian fees..............................................         474,288
Shareholder reports and notices.............................         401,497
Professional fees...........................................          66,155
Directors' fees and expenses................................          21,426
Other.......................................................          75,592
                                                              --------------
 
     TOTAL EXPENSES.........................................     135,464,088
                                                              --------------
 
     NET INVESTMENT INCOME..................................     216,913,534
                                                              --------------
 
NET REALIZED AND UNREALIZED GAIN:
Net realized gain...........................................     263,776,646
Net change in unrealized appreciation.......................   1,713,084,128
                                                              --------------
 
     NET GAIN...............................................   1,976,860,774
                                                              --------------
 
NET INCREASE................................................  $2,193,774,308
                                                              --------------
                                                              --------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       37
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                                                                  FOR THE YEAR
                                                                FOR THE YEAR          ENDED
                                                                    ENDED         FEBRUARY 29,
                                                              FEBRUARY 28, 1997       1996
- -----------------------------------------------------------------------------------------------
<S>                                                           <C>                 <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment income.......................................   $    216,913,534   $ 180,277,811
Net realized gain...........................................        263,776,646      17,186,743
Net change in unrealized appreciation.......................      1,713,084,128   1,976,893,191
                                                              -----------------   -------------
 
     NET INCREASE...........................................      2,193,774,308   2,174,357,745
                                                              -----------------   -------------
 
DIVIDENDS AND DISTRIBUTIONS FROM:
Net investment income.......................................       (229,873,261)   (158,425,268)
Net realized gain...........................................       (140,667,573)    (21,206,038)
                                                              -----------------   -------------
 
     TOTAL..................................................       (370,540,834)   (179,631,306)
                                                              -----------------   -------------
Net increase from capital stock transactions................      1,301,439,284     686,811,213
                                                              -----------------   -------------
 
     NET INCREASE...........................................      3,124,672,758   2,681,537,652
 
NET ASSETS:
Beginning of period.........................................      9,782,105,977   7,100,568,325
                                                              -----------------   -------------
 
     END OF PERIOD
    (INCLUDING UNDISTRIBUTED NET INVESTMENT INCOME OF
    $48,981,789 AND $61,941,516, RESPECTIVELY)..............   $ 12,906,778,735   $9,782,105,977
                                                              -----------------   -------------
                                                              -----------------   -------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       38
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Dean Witter Dividend Growth 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 to
provide reasonable current income and long-term growth of income and capital.
The Fund seeks to achieve its objective by investing primarily in common stock
of companies with a record of paying dividends and the potential for increasing
dividends. 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;
(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
 
                                       39
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
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.
 
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, the Fund pays the Investment
Manager 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; 0.50% to the portion of daily net assets exceeding $250 million but not
exceeding $1 billion; 0.475% to the portion of daily net assets exceeding $1
billion but not exceeding $2 billion; 0.45% to the portion of daily net assets
exceeding $2 billion but not exceeding $3 billion; 0.425% to the portion of
daily net assets exceeding $3 billion but not exceeding $4 billion; 0.40% to the
portion of daily net assets exceeding $4 billion but not exceeding $5 billion;
0.375% to the portion of daily net assets exceeding $5 billion but not exceeding
$6 billion; 0.35% to the portion of daily net assets exceeding $6 billion but
not exceeding $8 billion; 0.325% to the portion of daily net assets exceeding $8
billion but not exceeding $10 billion. Effective May 31, 1996, the Agreement was
amended to reduce the annual fee to 0.30% to the portion of daily net assets
exceeding $10 billion.
 
                                       40
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
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 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 and 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.
 
                                       41
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
Although there is no legal obligation for the Fund to pay expenses incurred in
excess of payments made to the Distributor under the Plan and the proceeds of
contingent deferred sales charges paid by investors upon redemption of shares,
if for any reason the Plan is terminated, the Trustees will consider at that
time the manner in which to treat such expenses. The Distributor has advised the
Fund that such excess amounts, including carrying charges, totaled $221,826,761
at February 28, 1997.
 
The Distributor has informed the Fund that for the year ended February 28, 1997,
it received approximately $9,636,000 in contingent deferred sales charges from
certain redemptions of the Fund's shares.
 
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
$1,202,576,556 and $398,476,816, respectively. Included in the aforementioned
are purchases of U.S. Government securities in the amount of $189,179,688.
 
For the year ended February 28, 1997, the Fund incurred brokerage commissions of
$460,302 with DWR for portfolio transactions executed on behalf of the Fund.
 
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 $732,000.
 
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. Aggregate pension costs for the year ended February 28, 1997,
included in Directors' fees and expenses in the Statement of Operations amounted
to $1,286. At February 28, 1997, the Fund had an accrued pension liability of
$55,719 which is included in accrued expenses in the Statement of Assets and
Liabilities.
 
                                       42
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
NOTES TO FINANCIAL STATEMENTS FEBRUARY 28, 1997, CONTINUED
 
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.............................................................    57,912,895   $ 2,481,578,268     50,150,972   $ 1,797,441,027
Reinvestment of dividends and distributions......................     7,903,656       344,605,406      4,681,316       166,381,580
                                                                   ------------   ---------------   ------------   ---------------
                                                                     65,816,551     2,826,183,674     54,832,288     1,963,822,607
Repurchased......................................................   (35,552,864)   (1,524,744,390)   (35,988,870)   (1,277,011,394)
                                                                   ------------   ---------------   ------------   ---------------
Net increase.....................................................    30,263,687   $ 1,301,439,284     18,843,418   $   686,811,213
                                                                   ------------   ---------------   ------------   ---------------
                                                                   ------------   ---------------   ------------   ---------------
</TABLE>
 
                                       43
<PAGE>
DEAN WITTER DIVIDEND GROWTH 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*
- -----------------------------------------------------------------------------------------------------------------------------------
 
<S>                                                              <C>          <C>        <C>        <C>        <C>        <C>
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of period...........................  $     39.65  $   31.16  $   30.86  $   28.70  $   27.01  $   23.50
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
Net investment income..........................................         0.81       0.75       0.72       0.68       0.70       0.71
Net realized and unrealized gain (loss)........................         7.55       8.50       0.24       2.16       1.72       3.63
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
Total from investment operations...............................         8.36       9.25       0.96       2.84       2.42       4.34
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
Less dividends and distributions from:
   Net investment income.......................................        (0.88)     (0.67)     (0.66)     (0.68)     (0.69)     (0.76)
   Net realized gain...........................................        (0.53)     (0.09)    --         --          (0.04)     (0.07)
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
Total dividends and distributions..............................        (1.41)     (0.76)     (0.66)     (0.68)     (0.73)     (0.83)
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
Net asset value, end of period.................................  $     46.60  $   39.65  $   31.16  $   30.86  $   28.70  $   27.01
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
                                                                 -----------  ---------  ---------  ---------  ---------  ---------
 
TOTAL INVESTMENT RETURN+.......................................        21.37%     30.01%      3.25%      9.98%      9.13%     18.82%
 
RATIOS TO AVERAGE NET ASSETS:
Expenses.......................................................         1.22%      1.31%      1.42%      1.37%      1.40%      1.42%
 
Net investment income..........................................         1.95%      2.14%      2.42%      2.31%      2.67%      2.91%
 
SUPPLEMENTAL DATA:
Net assets, end of period, in millions.........................  $    12,907  $   9,782  $   7,101  $   6,712  $   5,386  $   4,071
 
Portfolio turnover rate........................................            4%        10%         6%        13%         8%         5%
 
Average commission rate paid...................................  $    0.0541     --         --         --         --         --
 
<CAPTION>
 
                                                                   1991       1990       1989       1988*
- ---------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>        <C>        <C>        <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period...........................  $   22.47  $   20.32  $   19.28  $   20.63
                                                                 ---------  ---------  ---------  ---------
Net investment income..........................................       0.79       0.72       0.68       0.67
Net realized and unrealized gain (loss)........................       1.04       2.83       1.78      (0.99)
                                                                 ---------  ---------  ---------  ---------
Total from investment operations...............................       1.83       3.55       2.46      (0.32)
                                                                 ---------  ---------  ---------  ---------
Less dividends and distributions from:
   Net investment income.......................................      (0.80)     (0.76)     (0.62)     (0.73)
   Net realized gain...........................................     --          (0.64)     (0.80)     (0.30)
                                                                 ---------  ---------  ---------  ---------
Total dividends and distributions..............................      (0.80)     (1.40)     (1.42)     (1.03)
                                                                 ---------  ---------  ---------  ---------
Net asset value, end of period.................................  $   23.50  $   22.47  $   20.32  $   19.28
                                                                 ---------  ---------  ---------  ---------
                                                                 ---------  ---------  ---------  ---------
TOTAL INVESTMENT RETURN+.......................................       8.51%     17.85%     13.26%     (1.40)%
RATIOS TO AVERAGE NET ASSETS:
Expenses.......................................................       1.51%      1.41%      1.55%      1.55%
Net investment income..........................................       3.62%      3.46%      3.44%      3.47%
SUPPLEMENTAL DATA:
Net assets, end of period, in millions.........................  $   3,015  $   2,760  $   1,860  $   1,824
Portfolio turnover rate........................................          5%         3%         8%         7%
Average commission rate paid...................................     --         --         --         --
<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
 
                                       44
<PAGE>
DEAN WITTER DIVIDEND GROWTH SECURITIES INC.
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND BOARD OF DIRECTORS
OF DEAN WITTER DIVIDEND GROWTH 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 Dividend Growth
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, 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 $0.50 per share from long-term capital gains. For
       such period, 100% of the income paid qualified for the dividends
       received deduction available to corporations.
 
                                       45


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