WITTER DEAN DIVIDEND GROWTH SECURITIES INC
497, 1997-05-06
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<PAGE>
              PROSPECTUS
              APRIL 29, 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.")
 
               Shares of the Fund are continuously offered at net asset value.
However, redemptions and/or repurchases are subject in most circumstances to a
contingent deferred sales charge, scaled down from 5% to 1% of the amount
redeemed, if made within six years of purchase, which charge will be paid to the
Fund's Distributor, Dean Witter Distributors Inc. See "Redemptions and
Repurchases--Contingent Deferred Sales Charge." In addition, the Fund pays the
Distributor a distribution fee pursuant to a Plan of Distribution at the annual
rate of 1% of the lesser of the (i) average daily aggregate net sales since
inception of the Plan of Distribution or (ii) average daily net assets of the
Fund attributable to shares issued since inception of the Plan of Distribution.
See "Purchase of Fund Shares-- Plan of Distribution."
 
               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 April 29, 1997, which has been filed with the
Securities and Exchange Commission, and which is available at no charge upon
request of the Fund at the address or telephone numbers listed on this page. The
Statement of Additional Information is incorporated herein by reference.
 
     DEAN WITTER DISTRIBUTORS INC.
      DISTRIBUTOR
 
      TABLE OF CONTENTS
 
Prospectus Summary/2
Summary of Fund Expenses/3
Financial Highlights/4
The Fund and its Management/5
Investment Objective and Policies/5
  Risk Considerations and
   Investment Practices/6
Investment Restrictions/9
Purchase of Fund Shares/9
Shareholder Services/12
Redemptions and Repurchases/15
Dividends, Distributions and Taxes/17
Performance Information/18
Additional Information/18
 
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 investing primarily
Fund                in common stock of companies with a record of paying dividends and the potential for increasing dividends.
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Offered      Shares of common stock with $0.01 par value (see page 18).
- ------------------------------------------------------------------------------------------------------------------------------------
Offering            At net asset value without sales charge (see page 9). Shares redeemed within six years of purchase are subject
Price               to a contingent deferred sales charge under most circumstances (see page 15).
- ------------------------------------------------------------------------------------------------------------------------------------
Minimum             Minimum initial investment, $1,000; ($100 if the account is opened through EasyInvest-SM-); minimum subsequent
Purchase            investment, $100 (see page 9).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          The investment objective of the Fund is to provide reasonable current income and long-term growth of income and
Objective           capital.
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          Dean Witter InterCapital Inc., ("InterCapital"), the Investment Manager of the Fund, and its wholly-owned
Manager             subsidiary, Dean Witter Services Company Inc., serve in various investment management, advisory, management and
                    administrative capacities to 102 investment companies and other portfolios with assets of approximately $91.4
                    billion at March 31, 1997 (see page 5).
- ------------------------------------------------------------------------------------------------------------------------------------
Management          The Investment Manager receives a monthly fee at an annual rate of 0.625 of 1% of daily net assets, scaled down
Fee                 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.
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends and       Income dividends are paid quarterly; capital gains, if any, are distributed at least annually or retained for
Capital Gains       reinvestment by the Fund. Dividends and capital gains distributions are automatically reinvested in additional
Distributions       shares at net asset value unless the shareholder elects to receive cash (see page 17).
- ------------------------------------------------------------------------------------------------------------------------------------
Distributor and     Dean Witter Distributors Inc. (the "Distributor"). For its services as Distributor, which include payment of
Distribution Fee    sales commissions to account executives and various other promotional and sales-related expenses, the
                    Distributor receives from the Fund a distribution fee accrued daily and payable monthly at the rate of 1.0% per
                    annum of the lesser of (a) the Fund's average daily aggregate net sales of the Fund's shares since the inception
                    of a plan of distribution pursuant to Rule 12b-1 under the Investment Company Act of 1940, as amended (the
                    "Plan") or (b) the average daily net assets of the Fund attributable to shares issued, net of related shares
                    redeemed, since the inception of the Plan. This fee compensates the Distributor for the services provided in
                    distributing shares of the Fund and for sales related expenses. The Distributor also receives the proceeds of
                    any contingent deferred sales charges (see pages 10 and 11).
- ------------------------------------------------------------------------------------------------------------------------------------
Redemption--        At net asset value; redeemable involuntarily if total value of the account is less than $100, or, if the account
Contingent          was opened through EasyInvest-SM-, if after twelve months the shareholder has invested less than $1,000 in the
Deferred Sales      account. Although no commission or sales charge is imposed upon the purchase of shares, a contingent deferred
Charge              sales charge (scaled down from 5% to 1%) is imposed on any redemption of shares which causes the aggregate
                    current value of an account with the Fund to fall below the aggregate amount of the investor's purchase payments
                    made during the preceding six years. There is no charge imposed on redemption of shares purchased through
                    reinvestment of dividends or distributions (see page 12).
- ------------------------------------------------------------------------------------------------------------------------------------
Retirement          Investors can take advantage of tax benefits for personal retirement accounts by investing in the Fund through
Plans               an IRA (Individual Retirement Account) or Custodial Account under Section 403(b)(7) of the Internal Revenue Code
                    (see page 12).
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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 6-8).
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
                          ELSEWHERE IN THE PROSPECTUS
                AND IN THE STATEMENT OF ADDITIONAL INFORMATION.
 
                                       2
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
    The  following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The  expenses and fees set forth  in the table are for  the
fiscal year ended February 28, 1997.
 
<TABLE>
<S>                                                                             <C>
SHAREHOLDER TRANSACTION EXPENSES
- ---------------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases..................................     None
Maximum Sales Charge Imposed on Reinvested Dividends.......................     None
Deferred Sales Charge
  (as a percentage of the lesser of original purchase price or redemption
   proceeds)...............................................................     5.0%
      A contingent deferred sales charge is imposed at the following
      declining rates:
</TABLE>
 
<TABLE>
<CAPTION>
          YEAR SINCE PURCHASE                                                 PERCENTAGE OF
          PAYMENT MADE                                                       AMOUNT REDEEMED
          -----------------------------------------------------------------  ----------------
          <S>                                                                <C>
          First............................................................            5.0%
          Second...........................................................            4.0%
          Third............................................................            3.0%
          Fourth...........................................................            2.0%
          Fifth............................................................            2.0%
          Sixth............................................................            1.0%
          Seventh and thereafter...........................................        None
</TABLE>
 
<TABLE>
<S>                                                                             <C>
Redemption Fees............................................................       None
Exchange Fees..............................................................       None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- ---------------------------------------------------------------------------
Management Fees............................................................      0.39%
12b-1 Fees*................................................................      0.74%
Other Expenses.............................................................      0.09%
Total Fund Operating Expenses..............................................      1.22%
<FN>
- ------------
*  A PORTION OF THE 12B-1  FEE WHICH MAY NOT EXCEED  0.25% OF THE FUND'S AVERAGE
  DAILY NET  ASSETS IS  CHARACTERIZED AS  A SERVICE  FEE WITHIN  THE MEANING  OF
  NATIONAL  ASSOCIATION  OF SECURITIES  DEALERS,  INC. ("NASD")  GUIDELINES (SEE
  "PURCHASE OF FUND SHARES").
</TABLE>
 
<TABLE>
<CAPTION>
EXAMPLE                                   1 year    3 years   5 years   10 years
- ----------------------------------------  -------   -------   -------   --------
<S>                                       <C>       <C>       <C>       <C>
You would pay the following expenses  on
 a  $1,000  investment, assuming  (1) 5%
 annual return and (2) redemption at the
 end of each time period:...............    $62       $69       $87       $148
You would pay the following expenses  on
 the   same   investment,   assuming  no
 redemption:............................    $12       $39       $67       $148
</TABLE>
 
    THE ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST  OR
FUTURE  EXPENSES OR PERFORMANCE. ACTUAL EXPENSES AND  RETURNS OF THE FUND MAY BE
GREATER OR LESS THAN THOSE SHOWN.
 
    The purpose of  this table is  to assist the  investor in understanding  the
various  costs and expenses that  an investor in the  Fund will bear directly or
indirectly. For a  more complete description  of these costs  and expenses,  see
"The  Fund  and its  Management," "Plan  of  Distribution" and  "Redemptions and
Repurchases."
 
    Long-term shareholders  of  the Fund  may  pay  more in  sales  charges  and
distribution  fees than the  economic equivalent of  the maximum front-end sales
charge permitted by the NASD.
 
                                       3
<PAGE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
    The  following  ratios and  per  share data  for  a share  of  capital stock
outstanding throughout each period  have been audited  by Price Waterhouse  LLP,
independent  accountants. The financial highlights should be read in conjunction
with the financial statements  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.
<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.
 
                                       4
<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 Dean Witter,  Discover & Co. ("DWDC"),  a
balanced  financial services organization providing  a broad range of nationally
marketed credit and investment products.
 
    On February 5, 1997, DWDC and Morgan Stanley Group Inc. announced that  they
had  entered into an Agreement and Plan  of Merger, with the combined company to
be named Morgan  Stanley, Dean  Witter, Discover &  Co. The  business of  Morgan
Stanley  Group Inc. and  its affiliated companies  is providing a  wide range of
financial services  for sovereign  governments, corporations,  institutions  and
individuals  throughout the world. DWDC is the direct parent of InterCapital and
Dean  Witter  Distributors  Inc.,  the  Fund's  distributor.  It  is   currently
anticipated   that  the   transaction  will   close  in   mid-1997.  Thereafter,
InterCapital and Dean Witter  Distributors Inc. will  be direct subsidiaries  of
Morgan Stanley, Dean Witter, Discover & Co.
 
    InterCapital  and its wholly-owned subsidiary,  Dean Witter Services Company
Inc.,  serve  in  various   investment  management,  advisory,  management   and
administrative  capacities  to 102  investment  companies, thirty  of  which are
listed  on  the  New  York  Stock  Exchange,  with  combined  total  assets   of
approximately  $88.3  billion at  March 31,  1997.  The Investment  Manager also
manages portfolios of  pension plans, other  institutions and individuals  which
aggregated approximately $3.1 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 0.30% on assets over $10 billion. Effective May 1, 1997,
the Investment Manager's compensation  will be scaled down  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
 
                                       5
<PAGE>
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
Investment Manager, the projected total return on such securities is equal to or
greater  than  the  expected total  return  on  equity securities  or  when such
holdings might  be expected  to  reduce the  volatility  of the  portfolio  (for
purposes of this provision, the term "total return" means the difference between
the cost of a security and the aggregate of its market value and 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
 
                                       6
<PAGE>
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 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
 
                                       7
<PAGE>
any accrued  interest earned  on the  repurchase agreement.  In the  event of  a
default  or bankruptcy by a selling financial institution, the Fund will seek to
liquidate such  collateral.  However, the  exercising  of the  Fund's  right  to
liquidate  such collateral  could involve  certain costs  or delays  and, to the
extent that  proceeds  from  any  sale  upon a  default  of  the  obligation  to
repurchase were less than the repurchase price, the Fund could suffer a loss. It
is the current policy of the Fund not to invest in repurchase agreements that do
not  mature within seven  days if any  such investment, together  with any other
illiquid assets held by the Fund, amounts to more than 15% of its net assets.
 
    ZERO COUPON SECURITIES.  A portion of the fixed-income securities  purchased
by  the Fund may be  zero coupon securities. Such  securities are purchased at a
discount from their face amount, giving the purchaser the right to receive their
full value at maturity. The interest  earned on such securities is,  implicitly,
automatically  compounded and paid out at  maturity. While such compounding at a
constant rate eliminates the risk of receiving lower yields upon reinvestment of
interest if  prevailing interest  rates  decline, the  owner  of a  zero  coupon
security  will be  unable to participate  in higher yields  upon reinvestment of
interest received  on interest-paying  securities if  prevailing interest  rates
rise.
 
    A  zero coupon  security pays  no interest  to its  holder during  its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will not
receive current cash  available for distribution  to shareholders. In  addition,
zero  coupon securities are subject  to substantially greater price fluctuations
during periods  of  changing  prevailing  interest  rates  than  are  comparable
securities  which  pay interest  on  a current  basis.  Current federal  tax law
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  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"), a broker-dealer  affiliate of InterCapital, the views  of
Directors  of the Fund  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  $23.9 billion  in assets  as of  March 31,  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
 
                                       8
<PAGE>
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.
 
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.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    The Fund offers its  shares for sale  to the public  on a continuous  basis.
Pursuant   to  a  Distribution  Agreement  between  the  Fund  and  Dean  Witter
Distributors Inc. (the "Distributor"), 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 minimum initial purchase is $1,000. 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. The minimum initial purchase in the case of
investments through EasyInvest-SM-, an automatic purchase plan (see "Shareholder
Services"),  is $100, provided  that the schedule  of automatic investments will
result in investments totalling at least $1,000 within the first twelve  months.
In  the  case  of investments  pursuant  to Systematic  Payroll  Deduction Plans
(including Individual Retirement Plans), the
 
                                       9
<PAGE>
Fund, in its discretion,  may accept investments without  regard to any  minimum
amounts  which would otherwise  be required, if  the Fund has  reason to believe
that additional investments will increase  the investment in each account  under
such  Plans to at  least $1,000. Certificates  for shares purchased  will not be
issued unless requested by the shareholder in writing to the Transfer Agent.
 
    Shares of  the Fund  are sold  through the  Distribution 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.
 
    The offering price  will be the  net asset value  per share next  determined
following  receipt of  an order. While  no sales  charge is imposed  at the time
shares are purchased, a contingent deferred  sales charge may be imposed at  the
time  of  redemption (see  "Redemptions and  Repurchases"). Sales  personnel are
compensated for selling shares of the  Trust by the Distributor and/or  Selected
Broker-Dealer.  In addition, some sales  personnel of the Selected Broker-Dealer
will receive various types of non-cash compensation as special sales incentives,
including trips, educational and/or business seminars and merchandise. The  Fund
and the Distributor reserve the right to reject any purchase orders.
 
PLAN OF DISTRIBUTION
 
    The  Fund has adopted a  Plan of Distribution, pursuant  to Rule 12b-1 under
the Act (the "Plan"), under which the Fund will pay the Distributor a fee, which
is accrued daily and payable  monthly, at an annual rate  of 1.0% of the  lesser
of:  (a) the average daily aggregate gross  sales of the Fund's shares since the
inception of the Plan on July 2, 1984 (not including reinvestments of  dividends
or  capital gains  distributions), less  the average  daily aggregate  net asset
value of the  Fund's shares  redeemed since the  Plan's inception  upon which  a
contingent  deferred sales charge has been imposed or waived; or (b) the average
daily net  assets of  the Fund  attributable to  shares issued,  net of  related
shares redeemed, since inception of the Plan. This fee is treated by the Fund as
an  expense in the year it is accrued.  A portion of the fee payable pursuant to
the  Plan,  equal  to  0.25%  of  the  Fund's  average  daily  net  assets,   is
characterized  as  a service  fee  within the  meaning  of NASD  guidelines. The
service fee is  a payment made  for personal service  and/or the maintenance  of
shareholder accounts.
 
    Amounts paid under the Plan are 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, including the payment of commissions  for
sales  of the Fund's  shares and incentive  compensation to and  expenses of DWR
account executives and others who engage in or support distribution of shares or
who service  shareholder accounts,  including overhead  and telephone  expenses;
printing  and distribution of  prospectuses and reports  used in connection with
the offering  of the  Fund's  shares to  other  than current  shareholders;  and
preparation,  printing  and  distribution of  sales  literature  and advertising
materials. In addition, the  Distributor may utilize fees  paid pursuant to  the
Plan  to compensate DWR and other  Selected Broker-Dealers for their opportunity
costs in advancing such amounts,  which compensation would be  in the form of  a
carrying charge on any unreimbursed expenses incurred.
 
    For the fiscal year ended February 28, 1997, the Fund accrued payments under
the  Plan amounting to $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.
 
                                       10
<PAGE>
    At any given time,  expenses in distributing  shares of the  Fund may be  in
excess  of the total of (i) the payments  made by the Fund pursuant to the Plan,
and (ii) the  proceeds of contingent  deferred sales charges  paid by  investors
upon  the  redemption of  shares  (see "Redemptions  and Repurchases--Contingent
Deferred Sales Charge"). For example, if the Distributor incurred $1 million  in
expenses  in distributing shares of  the Fund and $750,000  had been received by
the Distributor as  described in (i)  and (ii) above,  the excess expense  would
amount  to  $250,000.  The Distributor  has  advised  the Fund  that  the excess
distribution expenses, including the  carrying charge described above,  totalled
$221,826,761 at February 28, 1997, which equalled 1.72% of the Fund's net assets
at such date.
 
    Because  there  is no  requirement under  the Plan  that the  Distributor be
reimbursed for all its  expenses or any requirement  that the Plan be  continued
from  year to year,  this excess amount  does not constitute  a liability of the
Fund. Although  there  is no  legal  obligation for  the  Fund to  pay  expenses
incurred  by the Distributor in excess of payments made to the Distributor under
the Plan, 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  by the Distributor, but not yet recovered through distribution fees or
contingent deferred sales charges,  may or may not  be recovered through  future
distribution fees or contingent deferred sales charges.
 
DETERMINATION OF NET ASSET VALUE
 
    The  net asset value per share of the  Fund is determined once daily at 4:00
p.m., New York time (or, on days  when the New York Stock Exchange closes  prior
to  4:00  p.m., at  such earlier  time), on  each  day that  the New  York Stock
Exchange is open by taking the value of all assets of the Fund, subtracting  all
its  liabilities, dividing by the number  of shares outstanding and adjusting to
the nearest cent. The net asset value  per share 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 Trustees); and (2) all other portfolio securities for which over-the-counter
market quotations are readily available are valued at the latest bid price. When
market quotations are not readily available, including circumstances under which
it is determined  by the Investment  Manager that  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  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.
 
                                       11
<PAGE>
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    AUTOMATIC  INVESTMENT OF DIVIDENDS AND  DISTRIBUTIONS.  All income dividends
and capital gains distributions  are automatically paid  in full and  fractional
shares  of the  Fund (or,  if specified by  the shareholder,  any other open-end
investment  company  for  which   InterCapital  serves  as  investment   manager
[collectively,  with the Fund, the "Dean Witter Funds"]), unless the shareholder
requests that they be paid  in cash. Shares so acquired  are not subject to  the
imposition  of a  contingent deferred  sales charge  upon their  redemption (see
"Redemptions and Repurchases").
 
    EASYINVEST.-SM-   Shareholders may  subscribe  to EasyInvest,  an  automatic
purchase  plan  which  provides  for  any  amount  from  $100  to  $5,000  to be
transferred automatically from a checking or savings account, on a semi-monthly,
monthly or quarterly basis,  to the Transfer Agent  for investment in shares  of
the Fund (see "Purchase of Fund Shares"
and "Redemptions and Repurchases--Involuntary Redemption").
 
    INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who   receives  a  cash  payment  representing   a  dividend  or  capital  gains
distribution may invest such dividend or distribution at the net asset value per
share next determined  after receipt  by the  Transfer Agent,  by returning  the
check or the proceeds to the Transfer Agent within thirty days after the payment
date.  Shares so  acquired are  not subject  to the  imposition of  a contingent
deferred sales charge upon their redemption (see "Redemptions and Repurchases.")
 
    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
contingent deferred sales charge  will be imposed on  shares redeemed under  the
Withdrawal  Plan  (See "Redemptions  and Repurchases--Contingent  Deferred Sales
Charge"). Therefore, any shareholder participating  in the Withdrawal Plan  will
have  sufficient shares redeemed  from his or  her account so  that the proceeds
(net of any applicable contingent deferred sales charge) to the shareholder will
be the designated monthly or quarterly amount.
 
    Withdrawal Plan payments should  not be considered  as dividends, yields  or
income.  If periodic withdrawal plan payments continuously exceed net investment
income and  net capital  gains, the  shareholder's original  investment will  be
correspondingly reduced and ultimately exhausted.
 
    Each  withdrawal constitutes  a redemption  of shares  and any  gain or loss
realized must  be  recognized for  Federal  income tax  purposes.  Although  the
shareholder  may  make  additional  investments  of  $2,500  or  more  under the
Withdrawal Plan,  withdrawals made  concurrently  with purchases  of  additional
shares  may  be  inadvisable because  of  the contingent  deferred  sales charge
applicable to the redemption of shares purchased during the preceding six  years
(see "Redemptions and Repurchases--Contingent Deferred Sales Charge").
 
    Shareholders  wishing to enroll in the  Withdrawal Plan should contact their
account executive or the Transfer Agent.
 
    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.  Adoption  of such  plans  should be  on advice  of  legal counsel  or tax
adviser.
 
    For further information  regarding plan administration,  custodial fees  and
other  details, investors  should contact  their DWR  or other  Selected Broker-
Dealer account executive or the Transfer Agent.
 
                                       12
<PAGE>
EXCHANGE PRIVILEGE
 
    The Fund  makes  available  to  its  shareholders  an  "Exchange  Privilege"
allowing  the exchange  of shares of  the Fund  for shares of  other Dean Witter
Funds sold with a contingent deferred sales charge ("CDSC funds"), for shares of
Dean Witter Short-Term U.S. Treasury  Trust, Dean Witter Limited Term  Municipal
Trust, Dean Witter Intermediate Term U.S. Treasury Trust, Dean Witter Short-Term
Bond  Fund, Dean Witter  Balanced Income Fund, Dean  Witter Balanced Growth Fund
and of five Dean Witter Funds which are money market funds (the foregoing eleven
non-CDSC funds are hereinafter referred  to as the "Exchange Funds").  Exchanges
may  be made after the shares of the  Fund acquired by purchase (not by exchange
or dividend reinvestment) have  been held for thirty  days. There is no  waiting
period for exchanges of shares acquired by exchange or dividend reinvestment.
 
    An  exchange to another CDSC  fund or any Exchange Fund  that is not a money
market fund is on the basis of the next calculated net asset value per share  of
each  fund after the  exchange order is  received. When exchanging  into a money
market fund from the Fund,  shares of the Fund are  redeemed out of the Fund  at
their  next calculated net  asset value and  the proceeds of  the redemption are
used to  purchase shares  of the  money market  fund at  their net  asset  value
determined  the following business day. Subsequent  exchanges between any of the
money market funds and any of the CDSC funds can be effected on the same  basis.
No  contingent deferred  sales charge  ("CDSC") is  imposed at  the time  of any
exchange, although any applicable CDSC will be imposed upon ultimate redemption.
Shares of the Fund acquired in exchange for shares of another CDSC fund having a
different CDSC schedule  than that  of this  Fund will  be subject  to the  CDSC
schedule  of this  Fund, even if  such shares are  subsequently re-exchanged for
shares of the  CDSC fund  originally purchased. During  the period  of time  the
shareholder  remains in the Exchange  Fund (calculated from the  last day of the
month in which the 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  reexchanged  for  shares  of  a  CDSC  fund,  the  holding  period
previously  frozen when the first  exchange was made resumes  on the last day of
the month in which shares of a CDSC fund are reacquired. Thus, the CDSC is based
upon the time (calculated as described above) the shareholder was invested in  a
CDSC fund (see "Redemptions and Repurchases--Contingent Deferred Sales Charge").
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 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.)
 
    In  addition, shares of the  Fund may be acquired  in exchange for shares of
Dean Witter Funds sold  with a front-end sales  charge ("front-end sales  charge
funds"),  but shares  of the  Fund, however acquired,  may not  be exchanged for
shares of  front-end sales  charge funds.  Shares  of a  CDSC fund  acquired  in
exchange  for shares of a front-end sales charge fund (or in exchange for shares
of other Dean Witter  Funds for which  shares of a  front-end sales charge  fund
have been exchanged) are not subject to any CDSC upon their redemption.
 
    Purchases  and  exchanges should  be made  for  investment purposes  only. A
pattern of frequent  exchanges may  be deemed by  the Investment  Manager to  be
abusive and contrary to the best interests of the Fund's other shareholders and,
at  the 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
sharehold-
 
                                       13
<PAGE>
ers, 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 and any
other conditions imposed by each fund. In the case of any shareholder holding  a
share certificate or certificates, no exchanges may be made until 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  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.
 
                                       14
<PAGE>
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  Shares of the Fund can be redeemed for cash at any time at  the
net asset value per share next determined; however, such redemption proceeds may
be  reduced by  the amount of  any applicable contingent  deferred sales charges
(see below). If shares  are held in a  Shareholder 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.
 
    CONTINGENT DEFERRED SALES CHARGE.  Shares of the Fund which are held for six
years or more after purchase (calculated from the last day of the month in which
the shares were purchased)  will not be subject  to any charge upon  redemption.
Shares redeemed sooner than six years after purchase may, however, be subject to
a  charge upon  redemption. This charge  is called a  "contingent deferred sales
charge" ("CDSC"), which  will be  a percentage of  the dollar  amount of  shares
redeemed  and will be assessed  on an amount equal to  the lesser of the current
market value  or  the cost  of  the shares  being  redeemed. The  size  of  this
percentage  will depend upon how long the shares have been held, as set forth in
the table below:
 
<TABLE>
<CAPTION>
                                         CONTINGENT DEFERRED
              YEAR SINCE                    SALES CHARGE
               PURCHASE                  AS A PERCENTAGE OF
             PAYMENT MADE                  AMOUNT REDEEMED
- --------------------------------------  ---------------------
<S>                                     <C>
First.................................          5.0%
Second................................          4.0%
Third.................................          3.0%
Fourth................................          2.0%
Fifth.................................          2.0%
Sixth.................................          1.0%
Seventh and thereafter................          None
</TABLE>
 
    A CDSC will not be imposed on:  (i) any amount which represents an  increase
in value of shares purchased within the six years preceding the redemption; (ii)
the current net asset value of shares purchased more than six years prior to the
redemption;  and (iii) the  current net asset value  of shares purchased through
reinvestment of dividends  or distributions and/or  shares acquired in  exchange
for  shares of Dean Witter Funds sold with  a front-end sales charge or of other
Dean Witter Funds acquired in exchange for such shares. 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, or which were purchased by the employee benefit plans established by DWR
and SPS Transaction Services, Inc. (an affiliate of DWR) for their employees  as
qualified under Section 401(k) of the Internal Revenue Code.
 
    In  addition, the CDSC, if otherwise applicable,  will be waived in the case
of:
 
(1)     redemptions of shares held at the time a
shareholder dies or becomes  disabled, only if the  shares are:  (A)  registered
either  in the name of an individual shareholder  (not a trust), or in the names
of such  shareholder and  his  or her  spouse as  joint  tenants with  right  of
survivorship; or   (B) held in a qualified corporate or self-employed retirement
plan,  Individual Retirement Account ("IRA")  or Custodial Account under Section
403(b)(7) of the Internal Revenue Code ("403(b) Custodial Account"), provided in
either case that the  redemption is requested  within one year  of the death  or
initial determination of disability;
 
(2)     redemptions in connection with the following
retirement  plan  distributions:   (A) lump-sum  or  other distributions  from a
qualified corporate or self-employed  retirement plan following retirement  (or,
in  the case of a "key employee" of  a "top heavy" plan, following attainment of
age 59  1/2);    (B) distributions  from  an  IRA or  403(b)  Custodial  Account
following
 
                                       15
<PAGE>
attainment  of age 59 1/2; or    (C) a tax-free return of an excess contribution
to an IRA; and
 
(3)     all redemptions of shares held for the
benefit of  a  participant  in  a corporate  or  self-employed  retirement  plan
qualified  under  Section  401(k)  of the  Internal  Revenue  Code  which offers
investment companies managed by the  Investment Manager or its subsidiary,  Dean
Witter  Services Company Inc., as  self-directed investment alternatives and for
which Dean Witter Trust Company  or Dean Witter Trust FSB,  each of which is  an
affiliate  of the  Investment Manager, serves  as Trustee or  the 401(k) Support
Services Group of DWR serves as record keeper ("Eligible 401(k) Plan"), provided
that either: (A)  the plan continues  to be  an Eligible 401(k)  Plan after  the
redemption;  or      (B)  the redemption  is  in  connection  with  the complete
termination of  the  plan involving  the  distribution  of all  plan  assets  to
participants.
 
    With  reference to (1) above, for the purpose of determining disability, the
Distributor utilizes the definition of disability contained in Section  72(m)(7)
of  the  Internal Revenue  Code, which  relates  to the  inability to  engage in
gainful employment. With reference  to (2) above,  the term "distribution"  does
not  encompass a direct transfer of  IRA, 403(b) Custodial Account or retirement
plan assets to  a successor custodian  or trustee. All  waivers will be  granted
only  following receipt by the Distributor  of confirmation of the shareholder's
entitlement.
 
    REPURCHASE.   DWR  and  other  Selected  Broker-Dealers  are  authorized  to
repurchase  shares represented by a stock  certificate which is delivered to any
of their  offices.  Shares held  in  a  shareholder's account  without  a  stock
certificate  may also  be repurchased by  DWR and  other Selected Broker-Dealers
upon the telephonic 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 30 days  after the date of  the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase in
shares of the Fund at the net asset value next determined after a  reinstatement
request,  together  with 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 60
days' notice  and at  net asset  value,  the shares  of any  shareholder  (other
 
                                       16
<PAGE>
than  shares held in an Individual Retirement Account or Custodial Account under
Section 403(b)(7) of  the Internal Revenue  Code) whose shares  have a value  of
less  than $100, or  such lesser amount as  may be fixed by  the Fund's Board of
Directors or, in the case of an account opened through EasyInvest-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  to make  an additional
investment in an amount which will increase the value of the account to at least
the applicable  amount before  the  redemption is  processed.  No CDSC  will  be
imposed on any involuntary redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS  AND  DISTRIBUTIONS.   The Fund  intends  to pay  quarterly income
dividends and to distribute substantially all  of the Fund's net short-term  and
long-term  capital gains, if  there are any,  at least once  each year. The Fund
may, however, determine either to distribute or to retain all or part of any net
long-term capital gains for reinvestment.
 
    All dividends and any capital gains distributions will be paid in additional
Fund shares  and will  be automatically  credited to  the shareholder's  account
without  issuance  of a  stock certificate  unless  the shareholder  requests in
writing   that   all   dividends   be   paid   in   cash.   (See    "Shareholder
Services--Automatic Investment of Dividends and Distributions".)
 
    TAXES.   Because the  Fund intends to  distribute all of  its net investment
income and net short-term capital gains to shareholders and 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 received by  the
shareholder  in the prior calendar 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, 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
dis-
 
                                       17
<PAGE>
tributions  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. The  total return  of  the Fund  is based  on historical
earnings and is not intended to indicate future performance. The "average annual
total return" of the Fund refers  to a figure reflecting the average  annualized
percentage  increase (or decrease) in the value  of an initial investment in the
Fund of $1,000 over  periods of one,  five and ten  years. Average annual  total
return  reflects all income earned by the Fund, any appreciation or depreciation
of the Fund's assets, all  expenses incurred by the  Fund and all sales  charges
which  would be incurred  by redeeming shareholders, for  the stated periods. It
also assumes reinvestment of all dividends and distributions paid by the Fund.
 
    In addition to the foregoing, the  Fund may advertise its total return  over
different  periods of time by means of aggregate, average, year-by-year or other
types of total  return figures.  The Fund  may also  advertise the  growth of  a
hypothetical  investment of $10,000, $50,000 or  $100,000 in shares of the Fund.
Such calculations  may  or may  not  reflect  the deduction  of  the  contingent
deferred  sales charge which, if reflected, would reduce the performance quoted.
The Fund  from time  to time  may  also advertise  its performance  relative  to
certain  performance rankings and indexes compiled by independent organizations,
such as mutual fund performance rankings of Lipper Analytical Services, Inc.
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING RIGHTS.   All shares of  common stock of  the Fund are  of $0.01  par
value  and are equal as to earnings,  assets and voting privileges. There are no
conversion,  pre-emptive  or  other  subscription   rights.  In  the  event   of
liquidation,  each share of common stock of  the Fund is entitled to its portion
of all of the  Fund's assets after  all debts and expenses  have been paid.  The
shares do not have cumulative voting rights.
 
    Under  ordinary circumstances, the Fund is not required, nor does it intend,
to hold Annual Meetings of 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  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
 
                                       18
<PAGE>
before  or after any  transaction in any  Dean Witter Fund  managed by them. Any
violations of the Code of Ethics are subject to sanctions, including  reprimand,
demotion or suspension or termination of employment. The Code of Ethics comports
with  regulatory requirements and the recommendations  in the 1994 report by the
Investment Company Institute Advisory Group on Personal Investing.
 
    SHAREHOLDER INQUIRIES.  All inquiries regarding the Fund should be  directed
to  the Fund at the telephone numbers or address set forth on the front cover of
this Prospectus.
 
                                       19
<PAGE>
                        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 Premier Income 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 -- APRIL 29, 1997
<PAGE>
 
<TABLE>
<S>                                           <C>
STATEMENT OF ADDITIONAL INFORMATION           DEAN WITTER
APRIL 29, 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 April  29, 1997, which  provides the basic
information you  should know  before  investing in  the  Fund, may  be  obtained
without charge from the Fund at the address or telephone numbers listed below or
from  the Fund's Distributor, Dean Witter Distributors Inc., or from Dean Witter
Reynolds Inc.,  at any  of  its branch  offices.  This Statement  of  Additional
Information is not a Prospectus. It contains information in addition to and more
detailed  than  that set  forth in  the  Prospectus. It  is intended  to provide
additional information regarding the activities and operations of the Fund,  and
should be read in conjunction with the Prospectus.
 
Dean Witter
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..........................................    13
Portfolio Transactions and Brokerage.............................    14
The Distributor..................................................    16
Shareholder Services.............................................    20
Redemptions and Repurchases......................................    24
Dividends, Distributions and Taxes...............................    26
Performance Information..........................................    27
Shares of the Fund...............................................    28
Custodian and Transfer Agent.....................................    28
Independent Accountants..........................................    28
Reports to Shareholders..........................................    28
Legal Counsel....................................................    29
Experts..........................................................    29
Registration Statement...........................................    29
Financial Statements.............................................    30
Report of Independent Accountants................................    42
</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 Dean Witter, Discover &  Co. ("DWDC"), a Delaware corporation. In
an internal  reorganization  which took  place  in January,  1993,  InterCapital
assumed  the  investment  advisory,  administrative  and  management  activities
previously performed by the InterCapital  Division of Dean Witter Reynolds  Inc.
("DWR"), a broker-dealer affiliate of InterCapital. (As hereinafter used in this
Statement  of Additional  Information, the terms  "InterCapital" and "Investment
Manager"  refer  to   DWR's  InterCapital   Division  prior   to  the   internal
reorganization  and  to Dean  Witter  InterCapital Inc.  thereafter.)  The daily
management of  the  Fund  and  research relating  to  the  Fund's  portfolio  is
conducted  by  or  under  the direction  of  officers  of the  Fund  and  of the
Investment Manager,  subject  to  review  by  the  Fund's  Board  of  Directors.
Information  as to these  Directors and Officers is  contained under the caption
"Directors and Officers."
 
    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
Premier  Income 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 Trust,
Munici-
 
                                       3
<PAGE>
pal  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)
sub-adviser  to  Templeton Global  Opportunities  Trust, an  open-end investment
company; (ii)  administrator  of The  BlackRock  Strategic Term  Trust  Inc.,  a
closed-end   investment  company;  and  (iii)  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.  The expenses  borne by  the Fund  include, but  are not  limited  to:
expenses  of  the  Plan  of  Distribution  pursuant  to  Rule  12b-1  (see  "The
Distributor"); charges and expenses of any registrar, custodian, stock  transfer
and  dividend  disbursing  agent; brokerage  commissions;  taxes;  engraving and
printing stock certificates; registration costs of the Fund and its shares under
federal and state securities laws; the  cost and expense of printing,  including
typesetting,   and  distributing  Prospectuses   and  Statements  of  Additional
Information of the Fund and supplements thereto to the Fund's shareholders;  all
expenses of shareholders' and directors' meetings and of preparing, printing and
mailing  of  proxy  statements  and reports  to  shareholders;  fees  and travel
expenses of directors or members of any advisory board or committee who are  not
employees of the Investment Manager or any corporate affiliate of the Investment
Manager;  all  expenses  incident  to  any  dividend,  withdrawal  or redemption
options; charges and  expenses of any  outside service used  for pricing of  the
Fund's shares;
 
                                       4
<PAGE>
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.
 
    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; and 0.30% of the portion of
daily net assets exceeding  $10 billion. Effective May  1, 1997, the  Investment
Manager's compensation will be scaled down to 0.275% on assets over $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  October
30,  1992 and by the  stockholders at a Special  Meeting of Stockholders held on
January 12, 1993. The Agreement is substantially identical to a prior investment
management agreement which was initially approved  by the Board of Directors  on
January 18, 1983, and by the stockholders of the Fund on March 16, 1983 (as such
agreement  had  been amended  prior thereto  to provide  for breakpoints  in the
management fee). The Agreement took effect on June 30, 1993 upon the spin-off by
Sears, Roebuck  and Co.  of its  remaining  shares of  DWDC. The  Agreement  was
amended  on May 1,  1994 to lower  management fees charged  on average daily net
assets of the  Fund in  excess of  $8 billion to  0.325%. The  Agreement may  be
terminated  at any time, without penalty, on thirty days' notice by the Board of
Directors of  the  Fund,  by the  holders  of  a majority,  as  defined  in  the
Investment  Company  Act of  1940, as  amended (the  "Act"), of  the outstanding
shares  of  the  Fund,  or  by  the  Investment  Manager.  The  Agreement   will
automatically terminate in the event of its assignment (as defined in the Act).
 
    Under its terms, the Agreement had an initial term ending April 30, 1994 and
will  continue 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  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.  At  their  meeting  held  on April  24,  1996,  the  Fund's  Board of
Directors, including all of the Independent Directors, approved continuation  of
the Agreement until April 30, 1998.
 
    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
 
                                       5
<PAGE>
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
84 Dean Witter Funds and the 14 TCW/DW Funds, are shown below.
 
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND
               AND ADDRESS                               PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------  ----------------------------------------------------------------------
<S>                                         <C>
Michael Bozic (56)                          Chairman  and Chief Executive Officer  of Levitz Furniture Corporation
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  or
                                            Trustee  of  the Dean  Witter Funds;  Director of  Eaglemark Financial
                                            Services, Inc.,  the  United Negro  College  Fund, and  Weirton  Steel
                                            Corporation.
 
Charles A. Fiumefreddo* (63)                Chairman,  Chief  Executive  Officer  and  Director  of  InterCapital,
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  DWDC
                                            subsidiaries;  formerly Executive Vice President  and Director of DWDC
                                            (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 Chemical 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  Chemical   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
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
                                            formerly  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>
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 FASB);  formerly Vice Chairman of the
                                            Board of  Governors  of the  Federal  Reserve System  (1986-1990)  and
                                            Assistant Secretary of the U.S. Treasury (1982-1986).
 
Michael E. Nugent (60)                      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                                    DWDC, DWR and  Novus Credit Services  Inc.; Director of  InterCapital,
Two World Trade Center                      DWSC  and Distributors; Director or Trustee  of the Dean Witter Funds;
New York, New York                          Director and/or officer of various DWDC 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); and  Chairman and
Counsel to the Independent Trustees         Chief  Investment  Officer  of   Axe-  Houghton  Management  and   the
114 West 47th Street                        Axe-Houghton Funds (April, 1983-June, 1991).
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.
 
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.
 
    In  addition, Robert  M. Scanlan, President  and Chief  Operating Officer of
InterCapital and DWSC,  Executive Vice  President of Distributors  and DWTC  and
Director of DWTC, Joseph J. McAlinden,
 
                                       7
<PAGE>
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 and Ruth Rossi,
Vice Presidents and  Assistant General  Counsels of InterCapital  and DWSC,  and
Carsten  Otto  and Frank  Bruttomesso,  Staff Attorneys  with  InterCapital, are
Assistant Secretaries of the Fund.
 
THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES
 
    The Board of Trustees consists of eight (8) trustees. These same individuals
also serve as directors or  trustees for all of the  Dean Witter Funds, and  are
referred  to in this  section as Trustees. As  of the date  of this Statement of
Additional Information, there are a total of 84 Dean Witter Funds, comprised  of
127 portfolios. As of March 31, 1997, the Dean Witter Funds had total net assets
of approximately $82.9 billion and more than six million shareholders.
 
    Six  Trustees  (75% of  the total  number) have  no affiliation  or business
connection with InterCapital or any of its affiliated persons and do not own any
stock or other securities issued  by InterCapital's parent company, DWDC.  These
are  the "disinterested" or "independent" Trustees.  The other two Trustees (the
"management Trustees")  are  affiliated  with  InterCapital.  Four  of  the  six
independent Trustees are also Independent Trustees of the TCW/DW Funds.
 
    Law and regulation establish both general guidelines and specific duties for
the  Independent Trustees.  The Dean Witter  Funds seek  as Independent Trustees
individuals of distinction  and experience in  business and finance,  government
service  or academia; these are people whose advice and counsel are in demand by
others and for  whom there is  often competition.  To accept a  position on  the
Funds'  Boards, such individuals may reject other attractive assignments because
the Funds make  substantial demands  on their time.  Indeed, by  serving on  the
Funds'  Boards, certain Trustees who would  otherwise be qualified and in demand
to serve on bank boards would be prohibited by law from doing so.
 
    All of the Independent Trustees serve as members of the Audit Committee  and
the  Committee of the Independent Trustees. Three  of them also serve as members
of the Derivatives Committee. During the calendar year ended December 31,  1996,
the  three Committees held a combined  total of sixteen meetings. The Committees
hold some  meetings at  InterCapital's offices  and some  outside  InterCapital.
Management  Trustees or  officers do not  attend these meetings  unless they are
invited for purposes of furnishing information or making a report.
 
    The Committee of the  Independent Trustees is  charged with recommending  to
the  full Board approval  of management, advisory  and administration contracts,
Rule 12b-1  plans  and  distribution and  underwriting  agreements;  continually
reviewing  Fund performance;  checking on  the pricing  of portfolio securities,
brokerage commissions, transfer agent costs  and performance, and trading  among
Funds  in the  same complex; and  approving fidelity bond  and related insurance
coverage and allocations, as well as other matters that arise from time to time.
The Independent Trustees are required to select and nominate individuals to fill
any Independent Trustee vacancy on the Board  of any Fund that has a Rule  12b-1
plan of distribution. Most of the Dean Witter Funds have such a plan.
 
    The  Audit  Committee is  charged with  recommending to  the full  Board the
engagement  or  discharge  of  the  Fund's  independent  accountants;  directing
investigations  into matters  within the  scope of  the independent accountants'
duties, including the power  to retain outside  specialists; reviewing with  the
independent  accountants the audit plan and  results of the auditing engagement;
approving professional  services provided  by  the independent  accountants  and
other  accounting firms prior to the performance of such services; reviewing the
independence of the independent accountants; considering the range of audit  and
non-audit  fees;  reviewing  the  adequacy  of  the  Fund's  system  of internal
controls; and preparing  and submitting  Committee meeting minutes  to the  full
Board.
 
    Finally,  the  Board of  each  Fund has  formed  a Derivatives  Committee to
establish parameters for and oversee the activities of the Fund with respect  to
derivative investments, if any, made by the Fund.
 
                                       8
<PAGE>
DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT TRUSTEES AND AUDIT COMMITTEE
 
    The  Chairman of  the Committee  of the  Independent Trustees  and the Audit
Committee maintains an  office at  the Funds' headquarters  in New  York. He  is
responsible  for keeping abreast of regulatory and industry developments and the
Funds' operations and management. He  screens and/or prepares written  materials
and  identifies  critical  issues  for  the  Independent  Trustees  to consider,
develops agendas  for Committee  meetings,  determines the  type and  amount  of
information  that the Committees will need to form a judgment on various issues,
and arranges to have  that information furnished to  Committee members. He  also
arranges  for  the services  of independent  experts and  consults with  them in
advance of meetings  to help  refine reports and  to focus  on critical  issues.
Members of the Committees believe that the person who serves as Chairman of both
Committees  and guides their efforts is  pivotal to the effective functioning of
the Committees.
 
    The Chairman of the  Committees also maintains  continuous contact with  the
Funds' management, with independent counsel to the Independent Trustees and with
the  Funds' independent auditors.  He arranges for a  series of special meetings
involving the  annual  review  of  investment  advisory,  management  and  other
operating  contracts of  the Funds  and, on  behalf of  the Committees, conducts
negotiations with the Investment Manager and other service providers. In effect,
the Chairman of the  Committees serves as a  combination of chief executive  and
support staff of the Independent Trustees.
 
    The  Chairman of  the Committee  of the  Independent Trustees  and the Audit
Committee is  not  employed by  any  other  organization and  devotes  his  time
primarily  to the  services he  performs as  Committee Chairman  and Independent
Trustee of the Dean Witter Funds and  as an Independent Trustee and, since  July
1,  1996, as Chairman of the Committee of the Independent Trustees and the Audit
Committee of the TCW/DW Funds. The current Committee Chairman has had more  than
35 years experience as a senior executive in the investment company industry.
 
ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL DEAN
WITTER FUNDS
 
    The  Independent Trustees and the Funds'  management believe that having the
same Independent  Trustees  for  each  of  the  Dean  Witter  Funds  avoids  the
duplication  of  effort  that  would  arise  from  having  different  groups  of
individuals serving as  Independent Trustees for  each of the  Funds or even  of
sub-groups  of Funds.  They believe  that having  the same  individuals serve as
Independent Trustees of  all the  Funds tends  to increase  their knowledge  and
expertise regarding matters which affect the Fund complex generally and enhances
their  ability  to negotiate  on behalf  of  each Fund  with the  Fund's service
providers. This arrangement also precludes the possibility of separate groups of
Independent Trustees arriving at conflicting decisions regarding operations  and
management  of the  Funds and  avoids the cost  and confusion  that would likely
ensue. Finally, having the  same Independent Trustees serve  on all Fund  Boards
enhances  the ability of  each Fund to  obtain, at modest  cost to each separate
Fund, the services of Independent Trustees, and a Chairman of their  Committees,
of  the caliber, experience and business acumen  of the individuals who serve as
Independent Trustees of the Dean Witter Funds.
 
COMPENSATION OF INDEPENDENT TRUSTEES
 
    The Fund pays each Independent  Trustee an annual fee  of $1,000 plus a  per
meeting  fee of $50 for  meetings of the Board of  Trustees or committees of the
Board of Trustees attended  by the Trustee  (the Fund pays  the Chairman of  the
Audit  Committee an annual fee of $750 and pays the Chairman of the Committee of
the Independent Trustees  an additional  annual fee  of $1,200).  The Fund  also
reimburses such Trustees for travel and other out-of-pocket expenses incurred by
them  in connection with  attending such meetings. Trustees  and officers of the
Fund who are or have  been employed by the  Investment Manager or an  affiliated
company receive no compensation or expense reimbursement from the Fund.
 
    The  following  table  illustrates  the  compensation  paid  to  the  Fund's
Independent Trustees by the Fund for the fiscal year ended February 28, 1997.
 
                                       9
<PAGE>
                               FUND COMPENSATION
 
<TABLE>
<CAPTION>
                                                                   AGGREGATE
                                                                 COMPENSATION
NAME OF INDEPENDENT TRUSTEE                                      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  Trustees for the calendar year ended December 31, 1996 for services
to the 82 Dean Witter Funds and,  in the case of Messrs. Haire, Johnson,  Nugent
and  Schroeder, the 14 TCW/DW Funds that were in operation at December 31, 1996.
With respect to Messrs. Haire, Johnson,  Nugent and Schroeder, the TCW/DW  Funds
are  included solely because of a limited exchange privilege between those Funds
and five Dean Witter Money Market Funds.
 
           CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS
 
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS    FOR SERVICE
                                                                    CHAIRMAN OF          AS          TOTAL CASH
                                                                   COMMITTEES OF     CHAIRMAN OF    COMPENSATION
                               FOR SERVICE                          INDEPENDENT     COMMITTEES OF   FOR SERVICES
                              AS DIRECTOR OR                         DIRECTORS/      INDEPENDENT         TO
                               TRUSTEE AND       FOR SERVICE AS     TRUSTEES AND    TRUSTEES AND       82 DEAN
                             COMMITTEE MEMBER     TRUSTEE AND          AUDIT            AUDIT          WITTER
                                OF 82 DEAN      COMMITTEE MEMBER   COMMITTEES OF    COMMITTEES OF     FUNDS AND
NAME OF                           WITTER          OF 14 TCW/DW     82 DEAN WITTER     14 TCW/DW       14 TCW/DW
INDEPENDENT TRUSTEE               FUNDS              FUNDS             FUNDS            FUNDS           FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
Michael Bozic..............      $138,850           --                 --               --            $138,850
<S>                          <C>                <C>                <C>              <C>             <C>
Edwin J. Garn..............       140,900           --                 --               --             140,900
John R. Haire..............       106,400           $64,283           $195,450        $ 12,187         378,320
Dr. Manuel H. Johnson......       137,100            66,483            --               --             203,583
Michael E. Nugent..........       138,850            64,283            --               --             203,133
John L. Schroeder..........       137,150            69,083            --               --             206,233
</TABLE>
 
    As of the date of this Statement  of Additional Information, 57 of the  Dean
Witter  Funds, including the Fund, have adopted a retirement program under which
an Independent Trustee  who retires after  serving for at  least five years  (or
such lesser period as may be determined by the Board) as an Independent Director
or Trustee of any Dean Witter Fund that has adopted the retirement program (each
such Fund referred to as an "Adopting Fund" and each such Trustee referred to as
an  "Eligible Trustee")  is entitled  to retirement  payments upon  reaching the
eligible retirement age (normally, after attaining age 72). Annual payments  are
based  upon length of service. Currently, upon retirement, each Eligible Trustee
is entitled to  receive from  the Adopting  Fund, commencing  as of  his or  her
retirement  date and continuing for the remainder  of his or her life, an annual
retirement benefit (the "Regular Benefit") equal to 25.0% of his or her Eligible
Compensation plus 0.4166666% of such  Eligible Compensation for each full  month
of  service as an Independent Director or Trustee of any Adopting Fund in excess
of five years up to a maximum of 50.0% after ten years of service. The foregoing
percentages may be changed by the Board.(1) "Eligible Compensation" is one-fifth
of the total  compensation earned by  such Eligible Trustee  for service to  the
Adopting  Fund  in  the five  year  period prior  to  the date  of  the Eligible
Trustee's retirement. Benefits under the  retirement program are not secured  or
funded by the Adopting Funds.
 
    The  following  table illustrates  the  retirement benefits  accrued  to the
Fund's Independent Trustees 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  Trustees, 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.
 
                                       10
<PAGE>
          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 TRUSTEE          (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>
 
- ------------
(1) An Eligible Trustee  may elect alternate payments  of his or her  retirement
    benefits  based upon the  combined life expectancy  of such Eligible Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount estimated to be payable under  this method, through the remainder  of
    the  later of  the lives of  such Eligible  Trustee and spouse,  will be the
    actuarial equivalent  of  the Regular  Benefit.  In addition,  the  Eligible
    Trustee  may elect that the surviving  spouse's periodic payment of benefits
    will be equal  to either 50%  or 100%  of the previous  periodic amount,  an
    election  that, respectively,  increases or decreases  the previous periodic
    amount so that the  resulting payments will be  the actuarial equivalent  of
    the Regular Benefit.
 
(2)  Based on  current levels  of compensation.  Amount of  annual benefits also
    varies depending on the Trustee's elections described in Footnote (1) above.
 
(3) This number  reflects the effect  of the  extension of Mr.  Haire's term  as
    Trustee until June 1, 1998.
 
    As  of the date  of this Statement of  Additional Information, the aggregate
number of shares of beneficial interest of the Fund owned by the Fund's officers
and Trustees  as a  group  was less  than  1 percent  of  the Fund's  shares  of
beneficial interest outstanding.
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
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
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
 
                                       11
<PAGE>
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.
 
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.
 
                                       12
<PAGE>
    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.
 
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.
 
                                       13
<PAGE>
    The Fund may not:
 
         1. Invest in securities of any issuer if, to the knowledge of the Fund,
    any officer or director of the Fund  or of the Investment Manager owns  more
    than  1/2  of 1%  of the  outstanding  securities of  such issuer,  and such
    officers and directors who own more than 1/2 of 1% own in the aggregate more
    than 5% of the outstanding securities of such issuer.
 
         2. Purchase or sell real estate or interests therein (including limited
    partnership interests), although the Fund may purchase securities of issuers
    which engage in real estate operations  and securities which are secured  by
    real estate or interests therein.
 
         3. Purchase or sell commodities 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.
 
        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.
 
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
 
                                       14
<PAGE>
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  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. In order for DWR to effect any portfolio transactions for
the Fund, the commissions,  fees or other remuneration  received by DWR must  be
reasonable and fair compared to the commissions, fees or other remuneration paid
to  other brokers in  connection with comparable  transactions involving similar
securities being purchased or sold on an exchange during a comparable period  of
time. This standard would allow DWR to receive
 
                                       15
<PAGE>
no  more than  the remuneration  which would  be expected  to be  received by an
unaffiliated broker in a commensurate arm's-length transaction. Furthermore, the
Directors of  the  Fund, including  a  majority of  the  Directors who  are  not
"interested" persons of the Fund, as defined in the Act, have adopted procedures
which  are reasonably  designed to provide  that any commissions,  fees or other
remuneration paid to DWR are consistent with the foregoing standard. During  the
fiscal  years ended February 28, 1995, February  29, 1996, and February 28, 1997
the Fund paid  a total  of $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 DWR. 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 DWDC. The  Directors who are  not, and were not  at the time  they
voted,  interested persons of the Fund, as  defined in the Act (the "Independent
Directors"), approved, at their  meeting held on October  30, 1992, 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, 1994, and  provides that it will remain in  effect
from  year to year thereafter if approved by the Board. At their meeting held on
April 24, 1997,  the Directors  of the Fund,  including all  of the  Independent
Directors,  approved  the  continuation  of the  Distribution  Agreement  for an
additional year until April 30, 1998.
 
    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. The Fund  and the Distributor
have agreed  to  indemnify each  other  against certain  liabilities,  including
 
                                       16
<PAGE>
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
 
    To compensate the Distributor for the services provided and for the expenses
borne under  the  Distribution  Agreement,  the  Fund  has  adopted  a  Plan  of
Distribution  pursuant to  Rule 12b-1  under the  Act (the  "Plan"), pursuant to
which the  Fund pays  the  Distributor compensation  accrued daily  and  payable
monthly  at the  annual rate  of 1.0% of  the lesser  of: (a)  the average daily
aggregate gross sales of the  Fund's shares since the  inception of the Plan  on
July  2,  1984  (not  including  reinvestments  of  dividends  or  capital gains
distributions), less the average daily aggregate  net asset value of the  Fund's
shares  redeemed since  the Plan's  inception upon  which a  contingent deferred
sales charge has been imposed or upon which such charge has been waived, or  (b)
the  average daily net assets of the  Fund attributable to shares issued, net of
related shares redeemed, since the inception  of the Plan. The Distributor  also
receives  the proceeds of  contingent deferred sales  charges imposed on certain
redemptions of shares (see "Redemptions  and Repurchases -- Contingent  Deferred
Sales  Charge" in the Prospectus). The Distributor has informed the Fund that it
received approximately  $9,850,627,  $9,444,839, and  $9,636,045  in  contingent
deferred sales charges during the fiscal years ended February 28, 1995, February
29, 1996, and February 28, 1997.
 
    The  Distributor has informed the Fund that a portion of the fees payable by
the Fund each  year pursuant  to the  Plan, which may  not exceed  0.25% of  the
Fund's  average daily net assets, is characterized  as a "service fee" under the
Rules of Fair  Practice of the  National Association of  Securities Dealers  (of
which  the Distributor is a  member). Such portion of the  fee is a payment made
for personal  service  and/or  the  maintenance  of  shareholder  accounts.  The
remaining  portion of the Plan  fees payable by the  Fund is characterized as an
"asset-based sales charge"  as such is  defined by the  aforementioned Rules  of
Fair  Practice. At their meeting held on  October 26, 1995, the Directors of the
Fund, including all of the Independent 12b-1 Directors, approved an amendment to
the Plan to permit payments  to be made under the  Plan with respect to  certain
distribution  expenses incurred in  connection with the  distribution of shares,
including personal services  to shareholders  with respect to  holdings of  such
shares,  of an  investment company whose  assets are  acquired by the  Fund in a
tax-free reorganization.
 
    The Plan  was  originally  adopted  by  a majority  vote  of  the  Board  of
Directors,  including all of  the Directors who are  not "interested persons" of
the Fund (the "Independent Directors") (none of  whom had or have any direct  or
indirect  financial interest  in the  operation of  the Plan)  (the "Independent
12b-1 Directors"), cast in person at a meeting called for the purpose of  voting
on  the Plan, on April 16, 1984, and  by the shareholders holding a majority, as
defined in the Act, of the outstanding shares of the Fund, at the Fund's  Annual
Meeting of Shareholders held on June 22, 1984.
 
    Pursuant  to the Plan and  as required by Rule  12b-1, the Distributor shall
provide the Fund, for review by  the Directors, and the Directors shall  review,
quarterly,  a written  report of  the amounts  expended under  the Plan  and the
purpose for which such expenditures were made.
 
    The Fund accrued $81,976,079 to the  Distributor, pursuant to the Plan,  for
its fiscal year ended February 28, 1997. This is an accrual at an annual rate of
1%  of the average  daily aggregate gross  sales of the  Fund's shares since the
inception of the Plan on July 2, 1984 (not including reinvestments of  dividends
or  capital gains  distributions), less  the average  daily aggregate  net asset
value of the  Fund's shares  redeemed since the  Plan's inception  upon which  a
contingent  deferred sales charge has been imposed or upon which such charge has
been waived.
 
    The Plan was  adopted in order  to permit the  implementation of the  Fund's
method  of distribution. Under  this distribution method shares  of the Fund are
sold without a sales load  being deducted at the time  of purchase, so that  the
full  amount  of  an investor's  purchase  payment  will be  invested  in shares
 
                                       17
<PAGE>
without any deduction for sales charges. Shares of the Fund may be subject to  a
contingent deferred sales charge, payable to the Distributor, if redeemed during
the  six years after  their purchase. DWR compensates  its account executives by
paying them, from its own funds, commissions for the sale of the Fund's  shares,
currently  a gross sales  credit of up  to 5% of  the amount sold  and an annual
residual commission of  up to  .25 of  1% of  the current  value (not  including
reinvested  dividends  or distributions)  of the  amount  sold. 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  share  sales.  The distribution  fee  that  the  Distributor
receives  from the Fund under the Plan, in effect, offsets distribution expenses
incurred on behalf of the  Fund and DWR's opportunity  costs, such as the  gross
sales  credit and an assumed interest charge thereon ("carrying charge"). In the
Distributor's reporting of its distribution  expenses to the Fund, such  assumed
interest (computed at the "broker's call rate") has been calculated on the gross
sales  credit as it is reduced by amounts received by DWR 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.
 
    At  any given time, the expenses incurred in distributing shares of the Fund
may be more or less than the total of (i) the payments made by the Fund pursuant
to the Plan and (ii) the proceeds  of contingent deferred sales charges paid  by
investors  upon redemption of shares. The  Distributor has advised the Fund that
such excess amount, including  the carrying charge  designed to approximate  the
opportunity  costs incurred  by DWR which  arise from it  having advanced monies
without having received the amount of any  sales charges imposed at the time  of
sale  of the Fund's shares, totalled $221,826,761 as of February 28, 1997, which
amount constitutes 1.72% of the Fund's net assets on such date. Because there is
no requirement under  the Plan that  the Distributor be  reimbursed for all  its
expenses  or any requirement that the Plan  be continued from year to year, this
excess amount does not constitute a liability of the Fund. Although there is  no
legal  obligation for the  Fund to pay  expenses incurred 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, had any direct or indirect
financial  interest in the operation  of the Plan except  to the extent that the
Investment Manager  or certain  of its  employees  may be  deemed to  have  such
interest  as a result of  benefits derived from the  successful operation of the
Plan or as a result of receiving a portion of the amounts expended thereunder by
the Fund.
 
                                       18
<PAGE>
    Under its terms, the Plan had an initial term ending December 31, 1984,  and
provides  that it will remain  in effect from year  to year thereafter, provided
such continuance is approved annually by a  vote of the Directors in the  manner
described above. Continuance of the Plan for one year, until April 30, 1998, was
approved  by the  Board of Directors  of the  Fund, including a  majority of the
Independent 12b-1 Directors, at a Board meeting held on April 24, 1997. Prior to
approving the continuation of  the Plan, the Board  requested and received  from
the  Distributor and reviewed  all the information which  it deemed necessary to
arrive at an informed determination.  In making their determination to  continue
the Plan, the Directors considered: (1) the Fund's experience under the Plan and
whether such experience indicates that the Plan is operating as anticipated; (2)
the  benefits the Fund had obtained, was obtaining and would be likely to obtain
under the Plan; and (3) what services  had been provided and were continuing  to
be  provided under the Plan by the Distributor to the Fund and its stockholders.
Based upon  their review,  the Directors  of  the Fund,  including each  of  the
Independent  12b-1 Directors, determined that continuation  of the Plan would be
in the best  interest of  the Fund  and would  have a  reasonable likelihood  of
continuing to benefit the Fund and its shareholders. In the Directors' quarterly
review  of the  Plan, they will  consider its continued  appropriateness and the
level of compensation provided therein.
 
   
    The Plan may not be  amended to increase materially  the amount to be  spent
for  the services described therein without  approval of the shareholders of the
Fund, and all  material amendments  of the  Plan must  also be  approved by  the
Directors in the manner described above. The Plan may be terminated at any time,
without  payment of any penalty, by vote of  a majority of the Directors who are
not interested persons of the Fund and who have no direct or indirect  financial
interest  in  the operation  of the  Plan, or  by a  vote of  a majority  of the
outstanding voting securities of the  Fund (as defined in  the Act) on not  more
than  thirty days' written notice to any other party to the Plan. So long as the
Plan is in effect, the election and nomination of Independent Directors shall be
committed to the discretion of the Independent Directors.
    
 
DETERMINATION OF NET ASSET VALUE
 
    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 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, Good Friday, Memorial Day, Independence Day, Labor
Day, Thanksgiving Day, and Christmas Day.
 
                                       19
<PAGE>
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  Fund's
transfer  agent, Dean  Witter Trust Company  (the "Transfer Agent").  This is an
open account in which shares owned by the investor are credited by the  Transfer
Agent  in lieu  of issuance of  a stock  certificate. If a  stock certificate is
desired, it must be requested in writing for each transaction. Certificates  are
issued  only for full shares and may be  redeposited in the account at any time.
There is no charge  to the investor  for issuance of  a certificate. Whenever  a
shareholder  instituted transaction  takes place  in the  Shareholder Investment
Account,  the  shareholder  will  be  mailed  a  written  confirmation  of   the
transaction from the Fund or from DWR or 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  Fund,  unless the
shareholder requests that they be paid in  cash. Each purchase of shares of  the
Fund is made upon the condition that the Transfer Agent is thereby automatically
appointed  as agent of the  investor to receive all  dividends and capital gains
distributions on shares owned by the investor. Such dividends and  distributions
will  be paid, at the  net asset value per  share, in shares of  the Fund (or in
cash if the shareholder so requests) as  of the close of business on the  record
date.  At any time  an investor may  request the Transfer  Agent, in writing, to
have subsequent dividends and/or capital gains distributions paid to him or  her
in  cash rather than  shares. To assure  sufficient time to  process the change,
such request 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 an open-end Dean Witter Fund other than Dean
Witter Dividend Growth Securities Inc. Such investment will be made as described
above for automatic investment in shares of the Fund, at the net asset value per
share of  the selected  Dean Witter  Fund as  of the  close of  business on  the
payment  date of the dividend or distribution  and will begin to earn dividends,
if any, in the selected Dean Witter  Fund the next business day. To  participate
in  the Targeted  Dividends program,  shareholders should  contact their  DWR or
other  selected  broker-dealer   account  executive  or   the  Transfer   Agent.
Shareholders of Dean Witter Dividend Growth Securities Inc. must be shareholders
of  the Dean Witter Fund  targeted to receive investments  from dividends at the
time they  enter the  Targeted Dividends  program. Investors  should review  the
prospectus of the targeted Dean Witter Fund before entering the program.
 
    EASYINVEST.-SM-    Shareholders may  subscribe  to EasyInvest,  an automatic
purchase plan  which  provides  for  any  amount  from  $100  to  $5,000  to  be
transferred automatically from a checking or savings account, on a semi-monthly,
monthly  or quarterly basis, to  the Transfer Agent for  investment in shares of
the Fund. Shares purchased through EasyInvest will be added to the shareholder's
existing account at  the net asset  value calculated the  same business day  the
transfer  of  funds is  effected.  For further  information  or to  subscribe to
EasyInvest,  shareholders   should  contact   their   DWR  or   other   selected
broker-dealer account executive or the Transfer Agent.
 
    INVESTMENT  OF DIVIDENDS OR DISTRIBUTIONS RECEIVED IN CASH.  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
at net asset value, without the imposition of a contingent deferred sales charge
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.
 
                                       20
<PAGE>
    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 contingent deferred sales charge will be imposed on shares
redeemed  under  the  Withdrawal  Plan  (see  "Redemptions  and  Repurchases  --
Contingent Deferred Sales Charge" in the Prospectus). Therefore, any shareholder
participating  in the Withdrawal Plan will  have sufficient shares redeemed from
his or  her account  so that  the  proceeds (net  of any  applicable  contingent
deferred  sales charge)  to the  shareholder will  be the  designated monthly or
quarterly amount.
 
    Withdrawal Plan payments should  not be considered  as dividends, yields  or
income,  If periodic withdrawal plan payments continuously exceed net investment
income and  net capital  gains, the  shareholder's original  investment will  be
correspondingly reduced and ultimately exhausted.
 
    Each  withdrawal constitutes  a redemption  of shares  and any  gain or loss
realized must  be  recognized for  Federal  income tax  purposes.  Although  the
shareholder  may  make  additional  investments  of  $2,500  or  more  under the
Withdrawal Plan,  withdrawals made  concurrently  with purchases  of  additional
shares  may  be  inadvisable because  of  the contingent  deferred  sales charge
applicable to the redemption of shares purchased during the preceding six  years
(see "Redemptions and Repurchases -- Contingent Deferred Sales Charge").
 
    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.
 
    DIRECT INVESTMENT THROUGH TRANSFER AGENT.  As discussed in the Prospectus, a
shareholder  may  make additional  investments  in Fund  shares  at any  time by
sending a  check in  any amount,  not less  than $100,  payable to  Dean  Witter
Dividend  Growth Securities  Inc., directly to  the Fund's  Transfer Agent. Such
amounts will be applied to  the purchase of Fund shares  at the net asset  value
per  share next computed after  receipt of the check  or purchase payment by the
Transfer Agent.  The shares  so purchased  will be  credited to  the  investor's
account.
 
EXCHANGE PRIVILEGE
 
    As discussed in the Prospectus, the Fund makes available to its shareholders
an Exchange Privilege whereby shareholders of the Fund may exchange their shares
for  shares of  other Dean  Witter Funds sold  with a  contingent deferred sales
charge   ("CDSC   funds"),   for   shares   of   Dean   Witter   Limited    Term
 
                                       21
<PAGE>
Municipal  Trust, Dean Witter Short-Term Bond  Fund, Dean Witter Short-Term U.S.
Treasury Trust, Dean Witter Intermediate  Term U.S. Treasury Trust, Dean  Witter
Balanced  Growth Fund,  Dean Witter  Balanced Income  Fund and  five Dean Witter
Funds which are  money market  funds (the  foregoing eleven  non-CDSC funds  are
hereinafter  referred to as  the "Exchange Funds"). Exchanges  may be made after
the shares  of  the Fund  acquired  by purchase  (not  by exchange  or  dividend
reinvestment)  have been held  for thirty days.  There is no  waiting period for
exchanges of shares acquired by  exchange or dividend reinvestment. An  exchange
will  be treated  for federal income  tax purposes  the same as  a repurchase or
redemption of shares,  on which the  shareholder may realize  a capital gain  or
loss.
 
    Any  new account  established through the  Exchange Privilege  will have the
same registration and cash dividend or dividend reinvestment plan as the present
account,  unless  the  Transfer  Agent  receives  written  notification  to  the
contrary.  For  telephone  exchanges,  the exact  registration  of  the existing
account and the account number must be provided.
 
    Any shares  held  in  certificate  form cannot  be  exchanged  but  must  be
forwarded  to the  Transfer Agent and  deposited into  the shareholder's account
before being eligible for exchange.  (Certificates mailed in for deposit  should
not be endorsed.)
 
    As  described  below, and  in the  Prospectus  under the  captions "Exchange
Privilege" and "Contingent Deferred Sales  Charge", a contingent deferred  sales
charge  ("CDSC") may  be imposed  upon a  redemption, depending  on a  number of
factors, including the number of years from the time of purchase until the  time
of  redemption or exchange  ("holding period"). When  shares of the  Fund or any
other CDSC fund are exchanged  for shares of an  Exchange Fund, the exchange  is
executed  at no charge to the shareholder, without the imposition of the CDSC at
the time of the exchange. During the  period of time the shareholder remains  in
the  Exchange  Fund (calculated  from the  last day  of the  month in  which the
Exchange Fund 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 CDSC fund. However, in the case of shares of the Fund exchanged
into an Exchange Fund on  or after April 23, 1990,  upon a redemption of  shares
which results in a CDSC being imposed, a credit (not to exceed the amount of the
CDSC)  will be given in an amount  equal to the Exchange Fund 12b-1 distribution
fees incurred on  or after  that date which  are attributable  to those  shares.
Shareholders  acquiring shares  of an  Exchange Fund  pursuant to  this exchange
privilege may exchange  those shares  back into a  CDSC fund  from the  Exchange
Fund,  with  no  charge  being  imposed on  such  exchange.  The  holding period
previously frozen when shares  were first exchanged for  shares of the  Exchange
Fund  resumes on the last  day of the month  in which shares of  a CDSC fund are
reacquired. A CDSC is imposed only  upon an ultimate redemption, based upon  the
time  (calculated as  discribed above)  the shareholder  was invested  in a CDSC
fund.
 
    In addition, shares of the  Fund may be acquired  in exchange for shares  of
Dean  Witter Funds sold  with a front-end sales  charge ("front-end sales charge
funds") but  shares of  the Fund,  however acquired,  may not  be exchanged  for
shares  of  front-end sales  charge funds.  Shares  of a  CDSC fund  acquired in
exchange for shares of a front-end sales charge fund (or in exchange for  shares
of  other Dean Witter  Funds for which  shares of a  front-end sales charge fund
have been exchanged) are not subject to any CDSC upon their redemption.
 
    When shares initially purchased in a  CDSC fund are exchanged for shares  of
another  CDSC fund, or for  shares of an Exchange Fund,  the date of purchase of
the shares of the fund exchanged into, for purposes of the CDSC upon redemption,
will be the  last day  of the  month in which  the shares  being exchanged  were
originally  purchased.  In allocating  the purchase  payments between  funds for
purposes of the CDSC, the amount which represents the current net asset value of
shares at the time of the exchange  which were (i) purchased more than three  or
six  years (depending on the CDSC schedule  applicable to those shares) prior to
the exchange,  (ii) originally  acquired through  reinvestment of  dividends  or
distributions  and  (iii) acquired  in exchange  for  shares of  front-end sales
charge funds, or  for shares  of other  Dean Witter  Funds for  which shares  of
front-end  sales charge funds have been  exchanged (all such shares called "Free
Shares"), will be exchanged first. Shares of Dean Witter
 
                                       22
<PAGE>
American Value  Fund  (formerly  Dean Witter  Industry-Valued  Securities  Inc.)
acquired  prior to April  30, 1984, shares  of the Fund  and Dean Witter Natural
Resource Development Securities Inc. acquired prior to July 2, 1984, and  shares
of  Dean Witter  Strategist Fund  acquired prior to  November 8,  1989, are also
considered Free Shares and will be the first Free Shares to be exchanged.  After
an  exchange,  all  dividends earned  on  shares  in an  Exchange  Fund  will be
considered Free Shares. If the exchanged  amount exceeds the value of such  Free
Shares,  an exchange is made, on a block-by-block basis, of non-Free Shares held
for the longest period of time (except that if shares held for identical periods
of time but subject to  different CDSC schedules are  held in the same  Exchange
Privilege  account, the shares  of that block  that are subject  to a lower CDSC
rate will be exchanged prior to the shares  of that block that are subject to  a
higher  CDSC rate). Shares  equal to any  appreciation in the  value of non-Free
Shares exchanged will be treated as Free Shares, and the amount of the  purchase
payments for the non-Free Shares of the fund exchanged into will be equal to the
lesser  of (a) the purchase payments for, or (b) the current net asset value of,
the exchanged non-Free  Shares. If  an exchange  between funds  would result  in
exchange  of only  part of  a particular block  of non-Free  Shares, then shares
equal to any appreciation  in the value of  the block (up to  the amount of  the
exchange)  will be treated as Free Shares  and exchanged first, and the purchase
payment for  that block  will  be allocated  on a  pro  rata basis  between  the
non-Free  Shares of  that block  to be  retained and  the non-Free  Shares to be
exchanged. The  prorated amount  of such  purchase payment  attributable to  the
retained  non-Free Shares will  remain as the purchase  payment for such shares,
and the amount  of purchase payment  for the exchanged  non-Free Shares will  be
equal  to the lesser of (a) the prorated  amount of the purchase payment for, or
(b) the current net asset value of, those exchanged non-Free Shares. Based  upon
the  procedures  described  in  the  Prospectus  under  the  caption "Contingent
Deferred Sales Charge," any  applicable CDSC will be  imposed upon the  ultimate
redemption  of shares of any  fund, regardless of the  number of exchanges since
those shares were originally purchased.
 
    With respect to  the redemption  or repurchase of  shares of  the Fund,  the
application  of proceeds to the purchase of new  shares in the Fund or any other
of the  funds and  the general  administration of  the Exchange  Privilege,  the
Transfer  Agent  acts as  agent for  the Distributor  and for  the shareholder's
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 various broker-dealers 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  broker-dealer  for any
transactions pursuant to this Exchange Privilege.
 
    Exchanges are subject to  the minimum investment  requirement and any  other
conditions  imposed by each fund. (The  minimum initial investment is $5,000 for
Dean Witter Liquid  Asset Fund Inc.,  Dean Witter Tax-Free  Daily Income  Trust,
Dean  Witter New  York Municipal Money  Market Trust and  Dean Witter California
Tax-Free Daily  Income Trust  although  those funds  may, at  their  discretion,
accept  initial investments of as low  as $1,000. The minimum initial investment
is $10,000 for Dean Witter Short-Term  U.S. Treasury Trust, although that  fund,
in  its discretion, may accept  purchases as low as  $5,000. The minimum initial
investment is $5,000  for Dean Witter  Special Value Fund.  The minimum  initial
investment  for all other Dean Witter Funds  for which the Exchange Privilege is
available is $1,000.) Upon  exchange into Dean  Witter Short-Term U.S.  Treasury
Trust  or a money market 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.
 
                                       23
<PAGE>
    The  Fund and each  of the other Dean  Witter Funds may  limit the number of
times this  Exchange  Privilege  may  be exercised  by  any  investor  within  a
specified  period of  time. Also,  the Exchange  Privilege may  be terminated or
revised at any time by  the Fund and/or any of  the Dean Witter Funds for  which
shares  of the Fund have been exchanged, upon  such notice as may be required by
applicable regulatory agencies (presently sixty days for termination or material
revision), provided that six months' prior written notice of termination will be
given to the  shareholders who hold  shares of Exchange  Funds pursuant to  this
Exchange  Privilege  and provided  further that  the  Exchange Privilege  may be
terminated or materially revised without notice  at times (a) when the New  York
Stock  Exchange is  closed for other  than customary weekends  and holidays, (b)
when trading on that Exchange is restricted,  (c) when an emergency exists as  a
result of which 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 the Fund can be redeemed
for cash at any time at the net asset value per share next determined;  however,
such  redemption  proceeds  may  be  reduced by  the  amount  of  any applicable
contingent deferred  sales  charges  (see  below).  If  shares  are  held  in  a
shareholder's  account  without  a  share  certificate,  a  written  request for
redemption to the Fund's Transfer Agent at  P.O. Box 983, Jersey City, NJ  07303
is  required. if  certificates are  held by the  shareholder, the  shares may be
redeemed by surrendering the certificates with a written request for redemption.
The share  certificate, or  an accompanying  stock power,  and the  request  for
redemption,  must be  signed by the  shareholder or shareholders  exactly as the
shares are registered. Each request  for redemption, whether or not  accompanied
by  a share certificate, must  be sent to the  Fund's Transfer Agent, which will
redeem the shares at their net asset value next computed (see "Purchase of  Fund
Shares"  in the Prospectus)  after it receives the  request, and certificate, if
any, in good order. Any redemption request received after such computation  will
be  redeemed at the next determined net asset value. The term "good order" means
that the share  certificate, if  any, and  request for  redemption are  properly
signed,  accompanied by  any documentation required  by the  Transfer Agent, and
bear signature guarantees when  required by the Fund  or the Transfer Agent.  If
redemption  is requested by a corporation,  partnership, trust or fiduciary, the
Transfer Agent may require that written evidence of authority acceptable to  the
Transfer Agent be submitted before such request is accepted.
 
    Whether  certificates are held  by the shareholder  or shares are  held in a
shareholder's account, if the proceeds are to  be paid to any person other  than
the record owner, or if the proceeds are to be paid to a corporation (other than
the Distributor or a selected broker-dealer for the account of the shareholder),
partnership,  trust or fiduciary, or sent to the shareholder at an address other
than the  registered  address, signatures  must  be guaranteed  by  an  eligible
guarantor  acceptable  to the  Transfer Agent  (shareholders should  contact the
Transfer Agent for  a determination as  to whether a  particular institution  is
such  an eligible guarantor). A  stock power may be  obtained from any dealer or
commercial bank. The Fund may  change the signature guarantee requirements  from
time  to  time upon  notice to  shareholders, which  may  be by  means of  a new
prospectus.
 
    CONTINGENT DEFERRED SALES CHARGE.  As stated in the Prospectus, a contingent
deferred sales charge ("CDSC") will be imposed on any redemption by an investor,
if, after such  redemption, the current  value of the  investor's shares of  the
Fund  is less than the dollar amount of  all payments by the shareholder for the
purchase of Fund shares during the preceding six years. However, no CDSC will be
imposed to the extent that the net  asset value of the shares redeemed does  not
exceed: (a) the current
 
                                       24
<PAGE>
net asset value of shares purchased more than six years prior to the redemption,
plus (b) the current net asset value of shares purchased through reinvestment of
dividends  or  distributions  of  the  Fund or  another  Dean  Witter  Fund (see
"Shareholder Services -- Targeted  Dividends"), plus (c)  the current net  asset
value  of shares acquired  in exchange for  (i) shares of  Dean Witter front-end
sales charge funds, or (ii) shares of  other Dean Witter Funds for which  shares
of  front-end sales charge funds have  been exchanged (see "Shareholder Services
- -- Exchange  Privilege"), plus  (d) increases  in  the net  asset value  of  the
investor's  shares above the total  amount of payments for  the purchase of Fund
shares made during the preceding six years. 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, or which
were  purchased  by  the  employee  benefit plans  established  by  DWR  and SPS
Transaction Services,  Inc.  (an  affiliate  of  DWR)  for  their  employees  as
qualified  under Section 401(k) of  the Internal Revenue Code.  The CDSC will be
paid to the Distributor.
 
    In determining the applicability of the CDSC to each redemption, the  amount
which  represents an increase  in the net  asset value of  the investor's shares
above the amount of  the total payments  for the purchase  of shares within  the
last  six  years will  be redeemed  first.  In the  event the  redemption amount
exceeds such increase in value, the next portion of the amount redeemed will  be
the  amount  which  represents the  net  asset  value of  the  investor's shares
purchased more than six  years prior to the  redemption and/or shares  purchased
through  reinvestment of  dividends or  distributions and/or  shares acquired in
exchange for shares of Dean Witter front-end sales charge funds or for shares of
other Dean Witter funds  for which shares of  front-end sales charge funds  have
been  exchanged. A portion of the amount  redeemed which exceeds an amount which
represents both such increase  in value and the  value of shares purchased  more
than  six  years  prior  to  the  redemption  and/or  shares  purchased  through
reinvestment of  dividends  or  distributions  and/or  shares  acquired  in  the
above-described exchanges will be subject to a CDSC.
 
    The  amount of the CDSC, if any, will  vary depending on the number of years
from the time  of payment  for the  purchase of Fund  shares until  the time  of
redemption  of such shares. For purposes of determining the number of years from
the time of any payment for the  purchase of shares, all payments made during  a
month  will be aggregated  and deemed to have  been made on the  last day of the
month. The following table sets forth the rates of the CDSC:
 
<TABLE>
<CAPTION>
                                                                                    CONTINGENT DEFERRED
      YEAR SINCE                                                                      SALES CHARGE AS
       PURCHASE                                                                       A PERCENTAGE OF
     PAYMENT MADE                                                                     AMOUNT REDEEMED
- ----------------------------------------------------------------------------------  --------------------
<S>                                                                                 <C>
First.............................................................................          5.0%
Second............................................................................          4.0%
Third.............................................................................          3.0%
Fourth............................................................................          2.0%
Fifth.............................................................................          2.0%
Sixth.............................................................................          1.0%
Seventh and thereafter............................................................          None
</TABLE>
 
    In determining the rate of the CDSC, it will be assumed that a redemption is
made of shares held by  the investor for the longest  period of time within  the
applicable  six-year period. This will result in  any such CDSC being imposed at
the  lowest  possible  rate.  Accordingly,  shareholders  may  redeem,   without
incurring  any CDSC,  amounts equal to  any net  increase in the  value of their
shares above the  amount of  their purchase payments  made within  the past  six
years  and amounts equal to the current  value of shares purchased more than six
years prior  to the  redemption  and shares  purchased through  reinvestment  of
dividends  or distributions  or acquired in  exchange for shares  of Dean Witter
front-end sales charge funds, or for shares of other Dean Witter Funds for which
shares of front-end  sales charge funds  have been exchanged.  The CDSC will  be
imposed, in accordance with the table shown above, on any redemptions within six
years  of purchase which  are in excess  of these amounts  and which redemptions
 
                                       25
<PAGE>
are not  (a) requested  within one  year of  death or  initial determination  of
disability   of  a  shareholder,  or  (b)   made  pursuant  to  certain  taxable
distributions from retirement plans or retirement accounts, as described in  the
Prospectus.
 
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment  for shares presented for repurchase or redemption will be made by check
within seven days after receipt by the Transfer Agent of the certificate  and/or
written  request  in good  order. 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  contingent deferred sales charge  or free of such  charge
(and  with regard to the  length of time shares subject  to the charge have been
held), any transfer involving  less than all  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 contingent  deferred sales  charge as  if they  had not  been so
transferred.
 
    REINSTATEMENT PRIVILEGE.  As discussed in the Prospectus, a shareholder  who
has  had  his or  her  shares redeemed  or  repurchased and  has  not previously
exercised this reinstatement privilege may reinstate  any portion or all of  the
proceeds of such redemption or repurchase in shares of the Fund at the net asset
value next determined after a reinstatement request, together with 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.
 
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.
 
                                       26
<PAGE>
    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. 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 contingent deferred
sales charge ("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.
 
    In  addition to the foregoing, the Fund  may advertise its total return over
different periods of time by means of aggregate, average, year-by-year or  other
types  of total  return figures.  Such calculations may  or may  not reflect the
deduction of the CDSC 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 CDSC. Based
on this 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.
 
    In addition, the Fund may compute  its aggregate total return for  specified
periods  by determining the  aggregate percentage rate which  will result in the
ending value of a  hypothetical $1,000 investment made  at the beginning of  the
period.  For the purpose of  this calculation, it is  assumed that all dividends
and distributions  are reinvested.  The formula  for computing  aggregate  total
return  involves a percentage obtained by dividing the ending value (without the
reduction for any CDSC) 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.
 
                                       27
<PAGE>
    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 $10,000,  $50,000
or  $100,000.  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.
 
    The Fund from time  to time may also  advertise its performance relative  to
certain performance rankings and indexes compiled by independent organizations.
 
SHARES OF THE FUND
- --------------------------------------------------------------------------------
 
    The  Fund is authorized to issue 500,000,000 shares of common stock of $0.01
par value. Shares  of the  Fund, when  issued, are  fully paid,  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 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.
 
                                       28
<PAGE>
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.
 
                                       29
<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
                                       30
<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
                                       31
<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
                                       32
<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
                                       33
<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
                                       34
<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
                                       35
<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
 
                                       36
<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.
 
                                       37
<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.
 
                                       38
<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.
 
                                       39
<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>
 
                                       40
<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
 
                                       41
<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.
 
                                       42


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