WITTER DEAN DIVIDEND GROWTH SECURITIES INC
497, 1996-05-02
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<PAGE>
                        DEAN WITTER
                        DIVIDEND GROWTH SECURITIES
                        PROSPECTUS--APRIL 29, 1996
 
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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,  1996, 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.
 
<TABLE>
<CAPTION>
TABLE OF CONTENTS
 
<S>                                                 <C>
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...........................       7
 
Purchase of Fund Shares...........................       8
 
Shareholder Services..............................      10
 
Redemptions and Repurchases.......................      12
 
Dividends, Distributions and Taxes................      13
 
Performance Information...........................      14
 
Additional Information............................      14
</TABLE>
 
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.
 
DEAN WITTER
DIVIDEND GROWTH SECURITIES INC.
TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048
 
(212) 392-2550 or (800) 869-NEWS (toll-free)
 
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  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 DISTRIBUTORS INC., DISTRIBUTOR
<PAGE>
PROSPECTUS SUMMARY
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<TABLE>
<S>             <C>
THE FUND        The  Fund, a  Maryland corporation,  is an  open-end, diversified  management investment
                company investing  primarily  in common  stock  of companies  with  a record  of  paying
                dividends and the potential for increasing dividends.
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SHARES OFFERED  Shares of common stock with $0.01 par value (see page 14).
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OFFERING        At  net asset value without sales charge (see  page 8). Shares redeemed within six years
PRICE           of purchase are subject to a  contingent deferred sales charge under most  circumstances
                (see page 12).
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MINIMUM         Minimum   initial  investment,   $1,000;  ($100  if   the  account   is  opened  through
PURCHASE        EasyInvest-SM-); minimum subsequent investment, $100 (see page 8).
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INVESTMENT      The investment  objective  of the  Fund  is to  provide  reasonable current  income  and
OBJECTIVE       long-term growth of income and capital.
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INVESTMENT      Dean Witter InterCapital Inc., ("InterCapital"), the Investment Manager of the Fund, and
MANAGER         its  wholly-owned  subsidiary,  Dean  Witter Services  Company  Inc.,  serve  in various
                investment management, advisory, management and administrative capacities to  ninety-six
                investment  companies and other portfolios with assets of approximately $83.4 billion at
                March 31, 1996 (see page 5).
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MANAGEMENT      The Investment Manager receives a monthly fee at an annual rate of 0.625 of 1% of  daily
FEE             net assets, scaled down on assets over $250 million. The fee should not be compared with
                fees  paid by other investment companies without also considering applicable sales loads
                and distribution fees, including those noted below.
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DIVIDENDS AND   Income dividends are  paid quarterly; capital  gains, if any,  are distributed at  least
CAPITAL GAINS   annually  or  retained  for  reinvestment  by  the  Fund.  Dividends  and  capital gains
DISTRIBUTIONS   distributions are  automatically reinvested  in  additional shares  at net  asset  value
                unless the shareholder elects to receive cash (see page 13).
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DISTRIBUTOR     Dean  Witter Distributors  Inc. (the  "Distributor"). For  its services  as Distributor,
AND             which include  payment of  sales commissions  to account  executives and  various  other
DISTRIBUTION    promotional  and  sales-related  expenses,  the Distributor  receives  from  the  Fund a
FEE             distribution fee accrued daily and payable monthly at the rate of 1.0% per annum of  the
                lesser  of (i) 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 8 and 9).
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REDEMPTION--    At  net asset value; redeemable involuntarily if total value of the account is less than
CONTINGENT      $100, or, if the account was opened  through EasyInvest-SM-, if after twelve months  the
DEFERRED        shareholder  has invested  less than  $1,000 in the  account. Although  no commission or
SALES CHARGE    sales charge is imposed upon the purchase of shares, a contingent deferred sales  charge
                (scaled  down from 5%  to 1%) is  imposed on any  redemption of shares  which causes the
                aggregate current value of an account with  the Fund to fall below the aggregate  amount
                of  the investor's purchase  payments made during  the preceding six  years. There is no
                charge imposed on redemption  of shares purchased through  reinvestment of dividends  or
                distributions (see page 12).
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RETIREMENT      Investors  can  take  advantage of  tax  benefits  for personal  retirement  accounts by
PLANS           investing in  the Fund  through  an IRA  (Individual  Retirement Account)  or  Custodial
                Account under Section 403(b)(7) of the Internal Revenue Code (see page 10).
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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 page 6).
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</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
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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 29, 1996, except as otherwise noted.
 
<TABLE>
<CAPTION>
SHAREHOLDER TRANSACTION EXPENSES
<S>                                                 <C>
Maximum Sales Charge Imposed on Purchases.........   None
Maximum Sales Charge Imposed on Reinvested
 Dividends........................................   None
Deferred Sales Charge
 (as a percentage of the lesser of original
 purchase price or redemption proceeds)...........   5.0%
</TABLE>
 
A contingent deferred sales charge is imposed at the following declining rates:
 
<TABLE>
<CAPTION>
                                                    PERCENTAGE
                                                        OF
                                                      AMOUNT
YEAR SINCE PURCHASE PAYMENT MADE                     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...................................           0.41%
12b-1 Fees*.......................................           0.79%
Other Expenses....................................           0.11%
Total Fund Operating Expenses.....................           1.31%
</TABLE>
 
- ------------------------
* 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 ("NASD") guidelines (See  "Purchase
  of Fund Shares").
 
<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:.......    $63       $72       $92       $158
You would pay the  following expenses on the  same
 investment, assuming no redemption:..............    $13       $42       $72       $158
</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
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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
                       ----------------------------------------------------------------------------------------
                        1996*    1995     1994     1993     1992*    1991     1990     1989     1988*    1987
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
<S>                    <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value,
 beginning of
 period............... $31.16   $30.86   $28.70   $27.01   $23.50   $22.47   $20.32   $19.28   $20.63   $17.56
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
  Net investment
   income.............   0.75     0.72     0.68     0.70     0.71     0.79     0.72     0.68     0.67     0.51
  Net realized and
   unrealized gain
   (loss).............   8.50     0.24     2.16     1.72     3.63     1.04     2.83     1.78    (0.99)    3.56
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
  Total from
   investment
   operations.........   9.25     0.96     2.84     2.42     4.34     1.83     3.55     2.46    (0.32)    4.07
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
  Less dividends and
   distributions from:
    Net investment
     income...........  (0.67)   (0.66)   (0.68)   (0.69)   (0.76)   (0.80)   (0.76)   (0.62)   (0.73)   (0.52)
    Net realized
     gain.............  (0.09)    --       --      (0.04)   (0.07)    --      (0.64)   (0.80)   (0.30)   (0.48)
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
  Total dividends and
   distributions......  (0.76)   (0.66)   (0.68)   (0.73)   (0.83)   (0.80)   (1.40)   (1.42)   (1.03)   (1.00)
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
  Net asset value, end
   of period.......... $39.65   $31.16   $30.86   $28.70   $27.01   $23.50   $22.47   $20.32   $19.28   $20.63
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
                       -------  -------  -------  -------  -------  -------  -------  -------  -------  -------
 
TOTAL INVESTMENT
 RETURN+..............  30.01%    3.25%    9.98%    9.13%   18.82%    8.51%   17.85%   13.26%   (1.40)%  23.96%
 
RATIOS TO AVERAGE NET
 ASSETS:
  Expenses............   1.31%    1.42%    1.37%    1.40%    1.42%    1.51%    1.41%    1.55%    1.55%    1.52%
  Net investment
   income.............   2.14%    2.42%    2.31%    2.67%    2.91%    3.62%    3.46%    3.44%    3.47%    3.35%
 
SUPPLEMENTAL DATA:
  Net assets, end of
   period, in
   millions........... $9,782   $7,101   $6,712   $5,386   $4,071   $3,015   $2,760   $1,860   $1,824   $1,652
  Portfolio turnover
   rate...............     10%       6%      13%       8%       5%       5%       3%       8%       7%      12%
</TABLE>
 
- --------------------------
* YEAR ENDED FEBRUARY 29.
 
+ DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE.
 
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.
 
    InterCapital and its wholly-owned  subsidiary, Dean Witter Services  Company
Inc.,   serve  in  various  investment   management,  advisory,  management  and
administrative capacities to  ninety-six investment companies,  thirty of  which
are  listed  on the  New  York Stock  Exchange,  with combined  total  assets of
approximately $80.7  billion at  March  31, 1996.  The Investment  Manager  also
manages  portfolios of pension  plans, other institutions  and individuals which
aggregated approximately $2.7 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 0.325% on assets over $8 billion. Effective May 1, 1996,
the  Investment Manager's  compensation will be  scaled down to  0.30% on assets
over $10 billion. For the fiscal year ended February 29, 1996, the Fund  accrued
total  compensation to the  Investment Manager amounting to  0.41% of the Fund's
average daily net assets and the Fund's total expenses amounted to 1.31% of  the
Fund's average daily net assets.
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
The investment objective of the Fund is to provide reasonable current income and
long-term  growth of income  and capital. This objective  is fundamental and may
not be changed  without shareholder  approval. There  is no  assurance that  the
objective  will be achieved. The Fund  seeks to achieve its investment objective
primarily through investments  in common  stock of  companies with  a record  of
paying  dividends and the potential for increasing dividends. Net asset value of
the Fund's shares  will fluctuate  with changes  in market  values of  portfolio
securities.  The Fund will attempt to avoid speculative securities or those with
speculative characteristics.
 
SPECIFIC INVESTMENT POLICIES
 
The Fund has adopted the following  specific policies which are not  fundamental
investment policies and which may be changed by the Fund's Board of Directors:
 
        (1)  Up to 30% of  the value of the Fund's  total assets may be invested
    in: (a) convertible debt securities, convertible preferred securities,  U.S.
    Government  securities (securities issued or  guaranteed as to principal and
    interest by  the  United  States or  its  agencies  and  instrumentalities),
    investment  grade corporate debt securities  and/or money market instruments
    when, in the opinion of the  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.
 
                                                                               5
<PAGE>
REPURCHASE AGREEMENTS
 
The Fund may enter into repurchase agreements, which may be viewed as a type  of
secured  lending by the Fund, and which typically involve the acquisition by the
Fund of  government securities  or  other securities  from a  selling  financial
institution  such as a bank, savings  and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a fixed time in the  future, usually not more than  seven days from the date  of
purchase.
 
RISK CONSIDERATIONS AND
INVESTMENT PRACTICES
 
AMERICAN DEPOSITORY RECEIPTS.  The Fund may invest in ADRs. These securities may
not necessarily be denominated in the same currency as the securities into which
they  may be converted.  ADRs are receipts  typically issued by  a United States
bank or trust company evidencing ownership of the underlying securities.
 
INVESTMENTS IN SECURITIES  RATED BAA BY  MOODY'S OR BBB  BY S&P.   The Fund  may
invest a portion of their assets in fixed-income securities rated at the time of
purchase  Baa or better by Moody's Investors Service, Inc. ("Moody's") or BBB or
better by Standard  & Poor's  Corporation ("S&P").  Investments in  fixed-income
securities  rated either Baa by Moody's or BBB by S&P (the lowest credit ratings
designated  "investment  grade")  may  have  speculative  characteristics   and,
therefore, changes in economic conditions or other circumstances are more likely
to  weaken their capacity to make principal  and interest payments than would be
the case with investments  in securities with higher  credit ratings. If a  bond
held  by the Fund is downgraded by a rating agency to a rating below Baa or BBB,
the Fund will retain such security in its portfolio until the Investment Manager
determines that it is practicable to  sell the security without undue market  or
tax  consequences  to the  Fund. In  the event  that such  downgraded securities
constitute 5% or more of the Fund's assets, the Investment Manager will seek  to
sell immediately sufficient securities to reduce the total to below 5%.
 
INVESTMENTS  IN FIXED-INCOME SECURITIES.   The Fund may invest  a portion of its
assets in fixed-income  securities. All fixed-income  securities are subject  to
two  types of risks: the credit risk and the interest rate risk. The credit risk
relates to the ability of the issuer  to meet interest or principal payments  or
both  as they come  due. Generally, higher  yielding fixed-income securities are
subject to a credit  risk to a greater  extent than lower yielding  fixed-income
securities.  The interest rate risk refers 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
 
6
<PAGE>
minimize  such risks. These procedures include effecting repurchase transactions
only with large,  well-capitalized and  well-established financial  institutions
whose  financial  condition  will  be continually  monitored  by  the Investment
Manager. In  addition, the  value of  the collateral  underlying the  repurchase
agreement  will be at least equal to the repurchase price, including any accrued
interest earned  on the  repurchase agreement.  In  the event  of a  default  or
bankruptcy  by a selling financial institution,  the Fund will seek to liquidate
such collateral. However, the exercising of  the Fund's right to liquidate  such
collateral  could  involve  certain costs  or  delays  and, to  the  extent that
proceeds from any sale upon a default of the obligation to repurchase were  less
than  the repurchase  price, the  Fund could  suffer a  loss. It  is the current
policy of the Fund  not to invest  in repurchase agreements  that do not  mature
within  seven  days if  any such  investment, together  with any  other illiquid
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  20 equity funds and fund portfolios with approximately $20.3 billion in
assets  as  of  March  31,  1996.  Paul  D.  Vance,  Senior  Vice  President  of
InterCapital  and a member  of InterCapital's Growth and  Income Group, has been
the primary portfolio manager  of the Fund  since its inception  and has been  a
portfolio manager at InterCapital for over five years.
 
    Although  the Fund  does not engage  in substantial short-term  trading as a
means of achieving its  investment objective, it  may sell portfolio  securities
without regard to the length of time they have been held, in accordance with the
investment  policies described earlier.  Pursuant to an  order of the Securities
and Exchange Commission, the Fund  may effect principal transactions in  certain
money  market instruments  with DWR. In  addition, the Fund  may incur brokerage
commissions on transactions conducted through DWR.
 
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
 
                                                                               7
<PAGE>
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 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. The
Fund  will waive the minimum purchase  requirement for investments in connection
with certain Unit Investment Trusts. 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. Shares of  the
Fund  purchased through the  Distributor are entitled  to any dividends declared
beginning on the  next business  day following  settlement date.  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.  Shares purchased through the Transfer  Agent are entitled to dividends
beginning on  the next  business day  following receipt  of an  order. As  noted
above,  orders placed  directly with the  Transfer Agent must  be accompanied by
payment.
 
    The offering price  will be the  net asset value  per share next  determined
following  receipt of  an order. 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
 
8
<PAGE>
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 29, 1996, the Fund accrued payments under
the  Plan amounting to $66,486,095, which amount is equal to 0.79% 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.
 
    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
$185,746,988 at February 29, 1996, which equalled 1.90% 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 or quoted by  NASDAQ is valued at its  latest sale price on that
exchange or quotation service; 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.
 
                                                                               9
<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.
 
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
 
10
<PAGE>
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 shareholders, investors should be aware that the Fund and
each of the other Dean Witter Funds  may in their discretion limit or  otherwise
restrict  the number of  times this Exchange  Privilege may be  exercised by any
investor. Any such restriction will be made  by the Fund on a prospective  basis
only,  upon notice  to the  shareholder not later  than ten  days following such
shareholder's most recent exchange.
 
    The Exchange Privilege may be terminated or revised at any time by the  Fund
and/or  any  of such  Dean Witter  Funds for  which  shares of  the Fund  may be
exchanged, upon  such  notice  as  may  be  required  by  applicable  regulatory
agencies.  Shareholders maintaining margin accounts with DWR or another Selected
Broker-Dealer are referred to their account executive regarding restrictions  on
exchange of shares of the Fund pledged in the margin account.
 
    The  current prospectus for each  fund describes its investment objective(s)
and policies, and shareholders should obtain one and examine it carefully before
investing. Exchanges are subject to  the minimum investment requirement 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.
Share-
 
                                                                              11
<PAGE>
holders are advised that during periods  of drastic economic or market  changes,
it  is  possible that  the  telephone exchange  procedures  may be  difficult to
implement, although this has not been the case with the Dean Witter Funds in the
past.
 
    For further  information  concerning the  Exchange  Privilege,  shareholders
should  contact their DWR  or other Selected  Broker-Dealer account executive or
the Transfer Agent.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
REDEMPTION.  Shares of 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 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,
an affiliate  of  the Investment  Manager,  serves as  recordkeeper  or  Trustee
("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,
 
12
<PAGE>
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 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 dividends and to
distribute substantially  all  of  the  Fund's net  investment  income  and  net
short-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.
 
                                                                              13
<PAGE>
    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.
 
    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 distributions
and  the  proceeds  of  redemptions  and  repurchases,  shareholders'   taxpayer
identification numbers must be furnished and certified as to their accuracy.
 
    Shareholders  should consult their  tax advisers as  to the applicability of
the foregoing to their current situation.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
From time to time the  Fund may quote its  "total return" in advertisements  and
sales  literature. 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  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.
 
14
<PAGE>
 
DEAN WITTER
DIVIDEND GROWTH SECURITIES
TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048
 
BOARD OF DIRECTORS
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Dr. Manuel H. Johnson
Paul Kolton
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
 
OFFICERS
Charles A. Fiumefreddo
Chairman and Chief Executive
Officer
Sheldon Curtis
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.


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