DEAN WITTER GLOBAL UTILITIES FUND
497, 1996-05-03
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<PAGE>
              PROSPECTUS
              APRIL 26, 1996
 
              Dean Witter Global Utilities Fund (the "Fund") is an open-end,
diversified management investment company whose investment objective is to seek
both capital appreciation and current income. The Fund seeks to meet its
objective by investing in equity and fixed-income securities of issuers
worldwide, which are primarily engaged in the utilities industry. (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 cases 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 Rule 12b-1 distribution fee pursuant to a Plan of Distribution at
the annual rate of 1.0% of the lesser of the (i) average daily aggregate net
sales or (ii) average daily net assets of the Fund. 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 26, 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.
 
     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/7
Investment Restrictions/13
Purchase of Fund Shares/13
Shareholder Services/16
Redemptions and Repurchases/19
Dividends, Distributions and Taxes/21
Performance Information/22
Additional Information/22
 
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
    Global Utilities Fund
    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 Fund          The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an
                  open-end, diversified management investment company. The Fund invests in equity and fixed-income
                  securities of issuers worldwide, which are primarily engaged in the utilities industry.
- ----------------------------------------------------------------------------------------------------------------------
Shares Offered    Shares of beneficial interest with $0.01 par value (see page 22).
- ----------------------------------------------------------------------------------------------------------------------
Minimum           Minimum initial investment, $1,000 ($100 if the account is opened through EasyInvest-SM-); minimum
Purchase          subsequent investments, $100 (see pages 13-14).
- ----------------------------------------------------------------------------------------------------------------------
Investment        The investment objective of the Fund is to seek both capital appreciation and current income.
Objective
- ----------------------------------------------------------------------------------------------------------------------
Investment        Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the Fund, and its wholly-
Manager           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).
- ----------------------------------------------------------------------------------------------------------------------
Management        The Investment Manager receives a monthly fee at the annual rate of 0.65% of daily net assets (see
Fee               page 5).
- ----------------------------------------------------------------------------------------------------------------------
Dividends and     Dividends from net investment income are paid quarterly. Capital gains, if any, are distributed at
Distributions     least annually or retained for reinvestment by the Fund. Dividends and capital gains distributions
                  are automatically reinvested in additional shares at net asset value unless the shareholder elects
                  to receive cash (see page 21).
- ----------------------------------------------------------------------------------------------------------------------
Distributor and   Dean Witter Distributors Inc. (the "Distributor"). The Distributor receives from the Fund a
Distribution 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 or (ii) the Fund's average daily net assets. 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 13-15).
- ----------------------------------------------------------------------------------------------------------------------
Redemption--      Shares are redeemable by the shareholder at net asset value. An account may be involuntarily
Contingent        redeemed if the total value of the account is less than $100 or, if the account was opened through
Deferred          EasyInvest, if after twelve months the shareholder has invested less than $1,000 in the account.
Sales             Although no commission or sales load 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 if after such
                  redemption the aggregate current value of an account with the Fund falls below the aggregate amount
                  of the investor's purchase payments made during the six years preceding the redemption. However,
                  there is no charge imposed on redemption of shares purchased through reinvestment of dividends or
                  distributions (see pages 19-20).
- ----------------------------------------------------------------------------------------------------------------------
Risks             The net asset value of the Fund's shares will fluctuate with changes in market value of portfolio
                  securities. The utilities industry has certain characteristics and risks, and developments within
                  that industry will affect the Fund's portfolio (see page 7). The value of debt securities (and, to a
                  lesser extent, equity securities) issued by utilities industry issuers tends to have an inverse
                  relationship to movement of interest rates. It should be recognized that the foreign securities and
                  markets in which the Fund will invest pose different and greater risks than those customarily
                  associated with domestic securities and their markets (see page 7).
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
    
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
                                   ELSEWHERE
       IN THIS 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 29, 1996.
 
<TABLE>
<S>                                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES
- ----------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases.............................   None
Maximum Sales Charge Imposed on Reinvested Dividends..................   None
Contingent 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
PAYMENT MADE                                                             PERCENTAGE
- ----------------------------------------------------------------------   -----------
<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 Fee..........................................................   None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- ----------------------------------------------------------------------
Management Fees.......................................................   0.65%
12b-1 Fees*...........................................................   0.95%
Other Expenses........................................................   0.27%
Total Fund Operating Expenses.........................................   1.87%
</TABLE>
 
    *A  PORTION OF THE 12b-1 FEE EQUAL TO  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>
<CAPTION>
                                                                                                       10
EXAMPLE                                                             1 year     3 years    5 years     years
- -----------------------------------------------------------------   -------    -------    -------    -------
<S>                                                                 <C>        <C>        <C>        <C>
You would  pay the  following expenses  on a  $1,000  investment,
 assuming  (1) 5% annual return and  (2) redemption at the end of
 each time period:...............................................     $69        $89        $121       $219
You would  pay the  following expenses  on the  same  investment,
 assuming no redemption:.........................................     $19        $59        $101       $219
</TABLE>
 
    THE  ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST OR
FUTURE EXPENSES OR PERFORMANCE.  ACTUAL EXPENSES OF THE  FUND MAY BE GREATER  OR
LESS THAN THOSE SHOWN.
 
    The  purpose of this  table is to  assist the investor  in understanding the
various costs and expenses that  an investor in the  Fund will bear directly  or
indirectly.  For a  more complete description  of these costs  and expenses, see
"The Fund  and  its Management,"  "Plan  of Distribution"  and  "Redemption  and
Repurchases."
 
    Long-term  shareholders  of  the Fund  may  pay  more in  sales  charges and
distribution fees than the  economic equivalent of  the maximum front-end  sales
charges permitted by the NASD.
 
                                       3
<PAGE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
    The  following ratios and per share data  for a share of beneficial interest
outstanding throughout each period  have been audited  by Price Waterhouse  LLP,
independent  accountants. The financial highlights should be read in conjunction
with the financial statements, the notes  thereto and the unqualified report  of
independent  accountants  which are  contained  in the  Statement  of Additional
Information. Further information about the performance of the Fund is  contained
in  the  Fund's Annual  Report to  Shareholders, which  may be  obtained without
charge upon request to the Fund.
 
<TABLE>
<CAPTION>
                                       FOR THE
                                        PERIOD
                             FOR THE   MAY 31,
                               YEAR     1994*
                              ENDED    THROUGH
                             FEBRUARY  FEBRUARY
                             29, 1996  28, 1995
                            ---------- --------
<S>                         <C>        <C>
PER SHARE OPERATING
 PERFORMANCE:
  Net asset value,
   beginning of period....    $ 9.80   $10.00
                            ---------- --------
  Net investment income...      0.18   0.13
  Net realized and
   unrealized gain
   (loss).................      1.64   (0.21   )
                            ---------- --------
  Total from investment
   operations.............      1.82   (0.08   )
                            ---------- --------
  Less dividends and
   distributions from:
    Net investment
     income...............     (0.16)  (0.12   )
    Net realized gain.....     (0.13)   --
                            ---------- --------
  Total dividends and
   distributions..........     (0.29)  (0.12   )
                            ---------- --------
  Net asset value, end of
   period.................    $11.33   $ 9.80
                            ---------- --------
                            ---------- --------
TOTAL INVESTMENT
 RETURN+..................    18.76%   (0.87)%(1)
RATIOS TO AVERAGE NET
 ASSETS:
  Expenses................     1.87%   1.97%(2)
  Net investment income...     1.66%   1.83%(2)
SUPPLEMENTAL DATA:
  Net assets, end of
   period, in thousands...  $360,347   $337,600
  Portfolio turnover
   rate...................       16%     2%(1)
</TABLE>
 
- ---------------
 *  COMMENCEMENT OF OPERATIONS.
 +  DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE.
(1) NOT ANNUALIZED.
(2) ANNUALIZED.
 
                                       4
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Dean Witter Global Utilities  Fund (the "Fund")  is an open-end  diversified
management investment company. The Fund is a trust of the type commonly known as
a  "Massachusetts  business  trust" and  was  organized  under the  laws  of The
Commonwealth of Massachusetts on October 22, 1993.
 
    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 (the "Dean  Witter
Funds"),  thirty  of which  are  listed on  the  New York  Stock  Exchange, with
combined 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  Trustees  reviews the  various  services provided  by  the  Investment
Manager  to ensure that the Fund's  general investment policies and programs are
being properly carried out and  that administrative services are being  provided
to the Fund in a satisfactory manner.
 
    As  full compensation for the services  and facilities furnished to the Fund
and for expenses of the  Fund assumed by the  Investment Manager, the Fund  pays
the  Investment Manager  monthly compensation  calculated daily  by applying the
following annual rate of  0.65% to the  Fund's net assets  determined as of  the
close  of each business  day. For the  fiscal year ended  February 29, 1996, the
Fund accrued total compensation to the Investment Manager amounting to 0.65%  of
the  Fund's average daily net  assets and the Fund's  total expenses amounted to
1.87% of the Fund's average daily net assets.
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The investment objective of  the Fund is to  seek both capital  appreciation
and  current income. The objective  is a fundamental policy  of the Fund and may
not be changed  without shareholder  approval. There  is no  assurance that  the
objective will be achieved.
 
    The  Fund will  attempt to  meet its  investment objective  by investing (at
least 65% of its total assets) in equity and fixed-income securities of  issuers
worldwide,  which are  primarily engaged in  the utilities  industry. The Fund's
investment portfolio will be invested in at least three separate countries.
 
    The  term   "utilities  industry"   describes  companies   engaged  in   the
manufacture,  production,  generation,  transmission, sale  and  distribution of
water, gas and electric energy, or who manufacture or supply equipment for  such
companies,  as well  as companies  engaged in  the communications  field and the
companies which manufacture  or supply equipment  for such companies,  including
telephone,  telegraph, satellite,  cable, microwave,  radio-telephone, computer,
mobile  communication  and  cellular  paging,  electronic  mail,  videotext  and
teletext  and  other new  or emerging  technology companies.  A company  will be
considered to be in the utilities industry
 
                                       5
<PAGE>
if, during the most recent  twelve month period, at  least 50% of the  company's
gross  revenues,  on  a  consolidated  basis,  are  derived  from  the utilities
industry. Under ordinary circumstances, at least 65% of the Fund's total  assets
will be invested in securities of companies in the utilities industry.
 
    The  principal currencies in  which securities held  in the Fund's portfolio
will be  denominated are:  the U.S.  dollar; Australian  dollar; Deutsche  mark;
Japanese  yen; French franc; British pound; Canadian dollar; Mexican peso; Swiss
franc; Dutch  guilder; Hong  Kong dollar;  New Zealand  dollar; Spanish  Peseta;
Swedish Krona; and European Currency Unit.
 
    The Investment Manager believes the Fund's investment policies are suited to
benefit   from  certain  characteristics  and   historical  performance  of  the
securities of utility companies. Many of these companies have historically set a
pattern of paying  regular dividends  over time,  and the  average common  stock
dividend  yield  of utilities  historically has  substantially exceeded  that of
industrial stocks. The Investment  Manager believes that  these factors may  not
only  provide current income but  also generally tend to  moderate risk and thus
may enhance the opportunity  for appreciation of securities  owned by the  Fund,
although  the potential for capital appreciation has historically been lower for
many utility  stocks compared  with  most industrial  stocks.  There can  be  no
assurance  that the historical investment  performance of the utilities industry
will be indicative of future events and performance.
 
    The Fund  invests in  both equity  securities (common  stock and  securities
convertible  into common stock) and fixed-income securities (bonds and preferred
stock) in  the utilities  industry. The  Fund will  shift its  asset  allocation
without  restriction between types of  utilities, among nationalities of issuers
and between  equity  and  fixed-income securities,  based  upon  the  Investment
Manager's  determination of  how to achieve  the Fund's  investment objective in
light of prevailing market, economic and financial conditions.
 
    Criteria utilized  by the  Investment  Manager in  the selection  of  equity
securities  include the following considerations:  earnings and dividend growth;
book value; dividend  discount; and price/earnings  relationships. In  addition,
the   Investment  Manager  makes  continuing   assessments  of  management,  the
prevailing regulatory framework and industry trends. The Investment Manager  may
also  utilize computer-based equity selection models. In keeping with the Fund's
objective, if in the opinion of the Investment Manager favorable conditions  for
capital  growth of equity securities are not prevalent at a particular time, the
Fund may allocate  its assets  predominantly or exclusively  in debt  securities
with  the aim of obtaining current income  and thus benefitting long term growth
of capital.
 
    The Fund may purchase equity securities  sold on the New York, American  and
other  domestic and foreign stock exchanges  and in the over-the-counter market.
Fixed-income securities in  which the Fund  may invest are  debt securities  and
preferred  stocks  which are  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") or which, if unrated, are deemed to be of comparable
quality by  the  Fund's  Investment Manager.  Under  normal  circumstances,  the
average  weighted maturity  of the fixed-income  securities held by  the Fund is
expected to be in excess of seven years. A description of corporate bond ratings
is contained in the Appendix to the Statement of Additional Information.
 
    Investments in fixed-income  securities rated either  BBB by S&P  or Baa  by
Moody's   (the  lowest  credit  ratings   designated  "investment  grade")  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 fixed-income security held by the Fund is rated  BBB
or  Baa and is subsequently downgraded by  a rating agency, the Fund will retain
such   security    in   its    portfolio    until   the    Investment    Manager
deter-
 
                                       6
<PAGE>
mines  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 net assets, the Investment Manager will sell
such  securities as soon as is practicable,  in sufficient amounts to reduce the
total to below 5%.
 
    The Fund may also  invest in securities  of foreign issuers  in the form  of
American  Depository  Receipts (ADRs),  European  Depository Receipts  (EDRs) or
other similar securities convertible into  securities of foreign issuers.  These
securities  may  not necessarily  be  denominated in  the  same currency  as the
securities into which they may be converted. ADRs are receipts typically  issued
by  a United States bank or trust company evidencing ownership of the underlying
securities.  EDRs  are  European  receipts  evidencing  a  similar  arrangement.
Generally,  ADRs, in registered form, are designed  for use in the United States
securities markets and EDRs,  in bearer form, are  designed for use in  European
securities markets.
 
    There may be periods during which, in the opinion of the Investment Manager,
market  conditions warrant  reduction of  some or  all of  the Fund's securities
holdings. During  such  periods, the  Fund  may adopt  a  temporary  "defensive"
posture  in which  greater than 35%  of its net  assets are invested  in cash or
money market instruments. Money market instruments in which the Fund may  invest
are  securities issued  or guaranteed  by the  U.S. Government  (Treasury bills,
notes and bonds, including  zero coupon securities);  bank obligations (such  as
certificates   of  deposit   and  bankers'   acceptances);  Yankee  instruments;
Eurodollar certificates of deposit;  obligations of savings institutions;  fully
insured  certificates  of deposit;  and commercial  paper  rated within  the two
highest grades by  Moody's or  S&P or,  if not rated,  are issued  by a  company
having an outstanding debt issue rated at least AA by S&P or Aa by Moody's.
 
RISK CONSIDERATIONS AND INVESTMENT PRACTICES
 
    UTILITIES  INDUSTRY.    The  utilities  industry  as  a  whole  has  certain
characteristics  and  risks  particular  to  that  industry.  Unlike  industrial
companies,  the  rates  which  utility  companies  may  charge  their  customers
generally are  subject  to  review and  limitation  by  governmental  regulatory
commissions. Although rate changes of a utility usually fluctuate in approximate
correlation  with financing costs, due to political and regulatory factors, rate
changes ordinarily occur only following a  delay after the changes in  financing
costs.  This factor will  tend to favorably affect  a utility company's earnings
and dividends  in  times  of  decreasing costs,  but  conversely  will  tend  to
adversely  affect earnings and dividends when costs are rising. In addition, the
value of utility debt  securities (and, to a  lesser extent, equity  securities)
tends to have an inverse relationship to the movement of interest rates.
 
    Among the risks affecting the utilities industry are the following: risks of
increases  in fuel  and other  operating costs;  the high  cost of  borrowing to
finance  capital  construction  during  inflationary  periods;  restrictions  on
operations  and  increased  costs  and delays  associated  with  compliance with
environmental and  nuclear  safety  regulations; the  difficulties  involved  in
obtaining  natural  gas  for  resale  or  fuel  for  generating  electricity  at
reasonable prices; the risks in  connection with the construction and  operation
of  nuclear power plants; the effects of  energy conservation and the effects of
regulatory changes, such as  the possible adverse effects  on profits of  recent
increased  competition among telecommunications  companies and the uncertainties
resulting  from   such  companies'   diversification  into   new  domestic   and
international  businesses, as well as agreements  by many such companies linking
future rate increases to inflation or other factors not directly related to  the
actual operating profits of the enterprise.
 
    FOREIGN  SECURITIES.   Foreign  securities  investments may  be  affected by
changes  in  currency  rates  or   exchange  control  regulations,  changes   in
governmental administration or economic or monetary policy (in the United States
and  abroad) or changed circumstances  in dealings between nations. Fluctuations
in the relative rates of
 
                                       7
<PAGE>
exchange between the currencies  of different nations will  affect the value  of
the  Fund's  investments denominated  in  foreign currency.  Changes  in foreign
currency exchange rates relative to the U.S. dollar will affect the U.S.  dollar
value  of the Fund's assets denominated in that currency and thereby impact upon
the Fund's total return on such assets.
 
    Foreign currency  exchange rates  are  determined by  forces of  supply  and
demand  on the foreign exchange markets. These forces are themselves affected by
the  international  balance  of  payments  and  other  economic  and   financial
conditions,  government intervention,  speculation and  other factors. Moreover,
foreign currency exchange rates may be affected by the regulatory control of the
exchanges on which the  currencies trade. The  foreign currency transactions  of
the  Fund will be conducted on a  spot basis or through forward foreign currency
exchange contracts  (described below).  The  Fund will  incur certain  costs  in
connection with these currency transactions.
 
    Investments  in  foreign securities  will  also occasion  risks  relating to
political  and  economic  developments  abroad,  including  the  possibility  of
expropriations  or confiscatory taxation, limitations on  the use or transfer of
Fund  assets  and  any  effects   of  foreign  social,  economic  or   political
instability. Foreign companies are not subject to the regulatory requirements of
U.S.  companies and, as  such, there may be  less publicly available information
about such companies.  Moreover, foreign  companies are not  subject to  uniform
accounting,   auditing  and  financial   reporting  standards  and  requirements
comparable to those applicable to U.S. companies.
 
    Securities of foreign issuers may be less liquid than comparable  securities
of  U.S.  issuers  and, as  such,  their  price changes  may  be  more volatile.
Furthermore, foreign exchanges and broker-dealers are generally subject to  less
government   and   exchange  scrutiny   and   regulation  than   their  American
counterparts. Brokerage commissions,  dealer concessions  and other  transaction
costs may be higher on foreign markets than in the U.S. In addition, differences
in clearance and settlement procedures on foreign markets may occasion delays in
settlements  of  the  Fund's  trades  effected in  such  markets.  As  such, the
inability to  dispose of  portfolio securities  due to  settlement delays  could
result  in  losses to  the  Fund due  to subsequent  declines  in value  of such
securities and the inability of the Fund to make intended security purchases due
to settlement problems could result in a failure of the Fund to make potentially
advantageous  investments.  To   the  extent  the   Fund  purchases   Eurodollar
certificates  of deposit  issued by foreign  branches of  domestic United States
banks, consideration will be  given to their  domestic marketability, the  lower
reserve  requirements  normally mandated  for  overseas banking  operations, the
possible  impact  of  interruptions  in  the  flow  of  international   currency
transactions  and future international political and economic developments which
might adversely affect the payment of principal or interest.
 
    Certain of the foreign markets in which the Fund may invest will be emerging
markets. These  new and  incompletely formed  markets will  have increased  risk
levels  above those  occasioned by investing  in foreign  markets generally. The
types of  these risks  are set  forth  above. The  Fund's management  will  take
cognizance  of these risks in allocating any of the Fund's investments in either
fixed-income  or  equity  securities  issued  by  issuers  in  emerging   market
countries.
 
    FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS. The Fund may enter into forward
foreign currency exchange contracts ("forward contracts") in connection with its
foreign securities investments.
 
    A  forward contract involves an obligation to purchase or sell a currency at
a future date,  which may  be any  fixed number  of days  from the  date of  the
contract agreed upon by the parties, at a price set at the time of the contract.
The  Fund may enter  into forward contracts  as a hedge  against fluctuations in
future foreign exchange rates.
 
                                       8
<PAGE>
    The Fund will enter into forward contracts under various circumstances. When
the Fund  enters  into  a contract  for  the  purchase or  sale  of  a  security
denominated  in a foreign currency, it may, for example, desire to "lock in" the
price of the security in U.S. dollars  or some other foreign currency which  the
Fund  is  temporarily  holding in  its  portfolio.  By entering  into  a forward
contract for  the purchase  or sale,  for a  fixed amount  of dollars  or  other
currency,  of the amount of foreign currency involved in the underlying security
transactions, the Fund will  be able to protect  itself against a possible  loss
resulting  from an adverse change in the relationship between the U.S. dollar or
other currency which is being used for the security purchase (by the Fund or the
counterparty) and  the foreign  currency in  which the  security is  denominated
during  the period between the  date on which the  security is purchased or sold
and the date on which payment is made or received.
 
    At other times, when,  for example, the  Fund's Investment Manager  believes
that  the  currency of  a particular  foreign country  may suffer  a substantial
decline against the  U.S. dollar or  some other foreign  currency, the Fund  may
enter  into a forward contract  to sell, for a fixed  amount of dollars or other
currency, the amount of foreign currency approximating the value of some or  all
of  the Fund's securities  holdings (or securities which  the Fund has purchased
for its  portfolio)  denominated  in  such  foreign  currency.  Under  identical
circumstances,  the Fund may enter into a  forward contract to sell, for a fixed
amount of U.S. dollars  or other currency, an  amount of foreign currency  other
than  the  currency  in  which  the  securities  to  be  hedged  are denominated
approximating the value of some or all of the portfolio securities to be hedged.
This method  of  hedging,  called  "cross-hedging,"  will  be  selected  by  the
Investment  Manager when it is determined that the foreign currency in which the
portfolio securities are denominated has insufficient liquidity or is trading at
a discount as compared with some other  foreign currency with which it tends  to
move in tandem.
 
    In  addition,  when  the Fund's  Investment  Manager  anticipates purchasing
securities at  some time  in  the future,  and wishes  to  lock in  the  current
exchange  rate of the currency in which those securities are denominated against
the U.S.  dollar or  some other  foreign currency,  the Fund  may enter  into  a
forward  contract to purchase an amount of currency  equal to some or all of the
value of the anticipated purchase, for a  fixed amount of U.S. dollars or  other
currency.
 
    In  all  of the  above  circumstances, if  the  currency in  which  the Fund
securities holdings (or anticipated portfolio securities) are denominated  rises
in  value with respect to the currency  which is being purchased (or sold), then
the Fund will have realized fewer gains  than had the Fund not entered into  the
forward  contracts.  Moreover,  the  precise matching  of  the  forward contract
amounts and the value of the securities involved will not generally be possible,
since the future value of such securities in foreign currencies will change as a
consequence of market  movements in the  value of those  securities between  the
date  the forward contract is entered into and  the date it matures. The Fund is
not required  to  enter  into  such transactions  with  regard  to  its  foreign
currency-denominated  securities and will not do so unless deemed appropriate by
the Investment  Manager.  The Fund  generally  will  not enter  into  a  forward
contract  with  a term  of greater  than one  year, although  it may  enter into
forward contracts for periods of  up to five years. The  Fund may be limited  in
its  ability to enter  into hedging transactions  involving forward contracts by
the Internal Revenue Code requirements relating to qualification as a  regulated
investment company (see "Dividends, Distributions and Taxes").
 
    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
 
                                       9
<PAGE>
the institution,  and  that  the institution  will  repurchase,  the  underlying
security  at a specified  price and at a  fixed time in  the future, usually not
more than seven  days from  the date  of purchase.  While repurchase  agreements
involve certain risks not associated with direct investments in debt securities,
including   the  risks  of  default  or  bankruptcy  of  the  selling  financial
institution,  the  Fund  follows  procedures  to  minimize  such  risks.   These
procedures   include   effecting  repurchase   transactions  only   with  large,
well-capitalized and  well-established  financial institutions  and  maintaining
adequate collateralization.
 
    WHEN-ISSUED  AND DELAYED DELIVERY SECURITIES  AND FORWARD COMMITMENTS.  From
time to  time,  in  the ordinary  course  of  business, the  Fund  may  purchase
securities  on a when-issued or  delayed delivery basis or  may purchase or sell
securities on a forward commitment basis. When such transactions are negotiated,
the price is fixed at the time  of the commitment, but delivery and payment  can
take place a month or more after the date of the commitment. There is no overall
limit  on the  percentage of  the Fund's  assets which  may be  committed to the
purchase of securities on a when-issued, delayed delivery or forward  commitment
basis.  An increase  in the  percentage of  the Fund's  assets committed  to the
purchase of securities on a when-issued  or delayed delivery basis may  increase
the volatility of the Fund's net asset value.
 
    WHEN,  AS AND IF ISSUED  SECURITIES.  The Fund  may purchase securities on a
"when, as and if issued" basis under which the issuance of the security  depends
upon  the  occurrence of  a  subsequent event,  such  as approval  of  a merger,
corporate  reorganization,  leveraged  buyout  or  debt  restructuring.  If  the
anticipated  event does not  occur and the  securities are not  issued, the Fund
will have  lost an  investment opportunity.  There is  no overall  limit on  the
percentage  of  the Fund's  assets which  may  be committed  to the  purchase of
securities on a "when, as and if issued" basis. An increase in the percentage of
the Fund's assets committed to the purchase of securities on a "when, as and  if
issued" basis may increase the volatility of its net asset value.
 
    REVERSE  REPURCHASE  AGREEMENTS AND  DOLLAR ROLLS.   The  Fund may  also use
reverse repurchase  agreements  and  dollar  rolls as  part  of  its  investment
strategy.  Reverse repurchase agreements involve sales  by the Fund of portfolio
assets concurrently with an agreement by the Fund to repurchase the same  assets
at  a later date at a fixed price. The Fund may enter into dollar rolls in which
the  Fund   sells  securities   and  simultaneously   contracts  to   repurchase
substantially  similar (same type  and coupon) securities  on a specified future
date. Reverse repurchase agreements and dollar  rolls involve the risk that  the
market  value of the  securities the Fund  is obligated to  repurchase under the
agreement may decline  below the  repurchase price. In  the event  the buyer  of
securities  under  a  reverse  repurchase agreement  or  dollar  roll  files for
bankruptcy or becomes insolvent, the Fund's use of proceeds of the agreement may
be restricted pending  a determination  by the other  party, or  its trustee  or
receiver, whether to enforce the Fund's obligation to repurchase the securities.
Reverse  repurchase  agreements  and  dollar  rolls  are  speculative techniques
involving leverage  (which may  increase investment  risk), and  are  considered
borrowings by the Fund.
 
    PRIVATE  PLACEMENTS.  The  Fund may invest up  to 5% of  its total assets in
securities which are  subject to restrictions  on resale because  they have  not
been  registered under the  Securities Act of 1933,  as amended (the "Securities
Act"), or which are otherwise  not readily marketable. (Securities eligible  for
resale  pursuant to  Rule 144A  under the Securities  Act, and  determined to be
liquid pursuant to the procedures discussed in the following paragraph, are  not
subject  to the foregoing restriction.)  These securities are generally referred
to as private placements or restricted securities. Limitations on the resale  of
such  securities  may have  an adverse  effect on  their marketability,  and may
prevent the Fund from disposing of them promptly at reasonable prices. The  Fund
may have to bear the expense of
 
                                       10
<PAGE>
registering  such securities  for resale and  the risk of  substantial delays in
effecting such registration.
 
    The Securities  and Exchange  Commission  has adopted  Rule 144A  under  the
Securities  Act,  which  permits  the  Fund  to  sell  restricted  securities to
qualified institutional  buyers  without  limitation.  The  Investment  Manager,
pursuant  to  procedures  adopted by  the  Trustees  of the  Fund,  will  make a
determination as to the liquidity of  each restricted security purchased by  the
Fund.  If a restricted security is determined to be "liquid," such security will
not be included within the  category "illiquid securities," which under  current
policy may not exceed 15% of the Fund's 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.
 
OPTIONS AND FUTURES TRANSACTIONS
 
    The Fund may  purchase and sell  (write) call and  put options on  portfolio
securities  which are denominated  in either U.S.  dollars or foreign currencies
and on the U.S. dollar and foreign currencies, which are or may in the future be
listed on  several U.S.  and  foreign securities  exchanges  or are  written  in
over-the-counter transactions ("OTC options"). OTC options are purchased from or
sold  (written) to  dealers or  financial institutions  which have  entered into
direct agreements with the Fund.
 
    The Fund is permitted to write covered call options on portfolio  securities
and  the U.S. dollar  and foreign currencies,  without limit, in  order to hedge
against the  decline in  the  value of  a security  or  currency in  which  such
security  is denominated  (although such  hedge is limited  to the  value of the
premium received),  to close  out long  call option  positions and  to  generate
income.  The Fund may write covered put  options, under which the Fund incurs an
obligation to buy  the security  (or currency)  underlying the  option from  the
purchaser  of the  put at  the option's  exercise price  at any  time during the
option period, at the purchaser's election.
 
    The Fund  may  purchase listed  and  OTC call  and  put options  in  amounts
equalling  up to 5% of  its total assets. The Fund  may purchase call options to
close out a covered call position or to protect against an increase in the price
of a security it  anticipates purchasing or,  in the case of  call options on  a
foreign  currency,  to hedge  against  an adverse  exchange  rate change  of the
currency  in  which  the  security  it  anticipates  purchasing  is  denominated
vis-a-vis  the currency in which the exercise price is denominated. The Fund may
purchase put  options on  securities which  it holds  in its  portfolio only  to
protect itself against a decline in the value of the security. The Fund may also
purchase  put options to close out written  put positions in a manner similar to
call option closing  purchase transactions.  There are  no other  limits on  the
Fund's ability to purchase call and put options.
 
                                       11
<PAGE>
    The  Fund may purchase and sell futures contracts that are currently traded,
or may in  the future  be traded,  on U.S.  and foreign  commodity exchanges  on
underlying  portfolio securities, on any  currency ("currency" futures), on U.S.
and foreign  fixed-income  securities  ("interest rate"  futures)  and  on  such
indexes  of U.S. or  foreign equity or  fixed-income securities as  may exist or
come into being ("index" futures). The  Fund may purchase or sell interest  rate
futures  contracts for the  purpose of hedging some  or all of  the value of its
portfolio securities (or  anticipated portfolio securities)  against changes  in
prevailing interest rates. The Fund may purchase or sell index futures contracts
for  the  purpose  of  hedging  some or  all  of  its  portfolio  securities (or
anticipated portfolio  securities)  against  changes in  their  prices  (or  the
currency  in which they  are denominated.) As a  futures contract purchaser, the
Fund incurs  an  obligation  to take  delivery  of  a specified  amount  of  the
obligation  underlying the  contract at  a specified  time in  the future  for a
specified price.  As  a  seller  of  a futures  contract,  the  Fund  incurs  an
obligation  to deliver  the specified amount  of the underlying  obligation at a
specified time in return for an agreed upon price.
 
    The Fund  also  may purchase  and  write call  and  put options  on  futures
contracts  which are traded  on an exchange and  enter into closing transactions
with respect to such options to terminate an existing position.
 
    New futures  contracts, options  and other  financial products  and  various
combinations  thereof continue to be developed. The  Fund may invest in any such
futures, options or products as may be developed, to the extent consistent  with
its investment objective and applicable regulatory requirements.
 
    RISKS  OF OPTIONS  AND FUTURES  TRANSACTIONS.   The Fund  may close  out its
position as writer of an option, or as a buyer or seller of a futures  contract,
only  if a liquid  secondary market exists  for options or  futures contracts of
that series. There is no assurance  that such a market will exist,  particularly
in  the case of OTC options, as such options may generally only be closed out by
entering into a closing purchase  transaction with the purchasing dealer.  Also,
exchanges  may limit the amount by which the price of many futures contracts may
move on any day. If  the price moves equal the  daily limit on successive  days,
then  it may prove  impossible to liquidate  a futures position  until the daily
limit moves have ceased.
 
    Futures contracts and options transactions may be considered speculative  in
nature  and may  involve greater risks  than those customarily  assumed by other
investment companies which do not invest  in such instruments. One such risk  is
that  the Investment Manager  could be incorrect  in its expectations  as to the
direction or extent of various interest rate or price movements or the time span
within which the  movements take place.  For example, if  the Fund sold  futures
contracts  for the sale of securities in anticipation of an increase in interest
rates, and then interest rates went  down instead, causing bond prices to  rise,
the  Fund  would  lose money  on  the sale.  Another  risk which  will  arise in
employing futures contracts to protect against the price volatility of portfolio
securities is that the prices of  securities, currencies and indexes subject  to
futures  contracts  (and  thereby  the futures  contract  prices)  may correlate
imperfectly with  the behavior  of the  U.S. dollar  cash prices  of the  Fund's
portfolio  securities  and their  denominated currencies.  See the  Statement of
Additional Information for a further discussion of risks.
 
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
Trustees of the  Fund and  others regarding economic  developments and  interest
rate  trends,  and the  Investment Manager's  own analysis  of factors  it deems
relevant. The Fund's portfolio is
man-
 
                                       12
<PAGE>
aged within InterCapital's Income and  Growth Group, which manages twenty  funds
and  fund portfolios with approximately $20.3 billion  in assets as of March 31,
1996. Edward F. Gaylor,  Senior Vice President of  InterCapital and a member  of
InterCapital's  Income and Growth Group, has  been the primary portfolio manager
of the  Fund  since its  inception.  Mr.  Gaylor has  been  managing  portfolios
comprised  of equity and  fixed-income securities 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. Under normal circumstances,
it is  not anticipated  that the  portfolio trading  will result  in the  Fund's
portfolio turnover rate exceeding 100% in any one year.
 
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.  As to 75% of  its total assets, invest  more than 5% of  the value of its
total assets in the securities of any one issuer (other than obligations  issued
or   guaranteed   by   the   United   States   Government,   its   agencies   or
instrumentalities).
 
   2. Invest 25%  or more  of the  value of its  total assets  in securities  of
issuers  in any one industry, with the exception of the utilities industry. This
restriction does not  apply to obligations  issued or guaranteed  by the  United
States Government, its agencies or instrumentalities.
 
   3.  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.
 
   4. As  to 75%  of its  total assets,  purchase more  than 10%  of the  voting
securities, or more than 10% of any class of securities, of any issuer.
 
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 "Distributors"), an affiliate of the Investment Manager,
shares of the Fund  are distributed by  the Distributor and  offered by DWR  and
other  dealers  who  have  entered  into  selected  dealer  agreements  with the
Distributor ("Selected Broker-Dealers"). The  principal executive office of  the
Distributor is located at Two World Trade Center, New York, New York 10048.
 
                                       13
<PAGE>
    The minimum initial purchase is $1,000. Minimum subsequent purchases of $100
or  more may be made by sending a check, payable to Dean Witter Global Utilities
Fund, 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,  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  all accounts under  such Plans to  at least $1,000.
Certificates for shares purchased will not be issued unless a request is made by
the shareholder in writing to the Transfer Agent. The offering price will be the
net asset value  per share next  determined following receipt  of an order  (see
"Determination of Net Asset Value").
 
    Shares  of  the Fund  are  sold through  the  Distributor on  a  normal five
business day (three business day as of June 7, 1995) settlement basis; that  is,
payment is due on the fifth business day (third business day as of June 7, 1995)
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  any dividends  declared
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.  While no sales charge  is imposed at the  time shares are purchased, a
contingent deferred sales charge may be  imposed at the time of redemption  (see
"Redemptions  and  Repurchases"). Sales  personnel  are compensated  for selling
shares of the Fund at the time of their sale by the Distributor and/or  Selected
Broker-Dealer.  In addition, some sales  personnel of the Selected Broker-Dealer
will receive 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 pays  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 Fund (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 Fund's  inception upon  which a  contingent deferred
sales charge has been  imposed or waived;  or (b) the  Fund's average daily  net
assets. 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  for  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's
account executives and others who engage in or support distribution of shares or
who service  shareholder accounts,  including overhead  and telephone  expenses;
printing  and distribution of  prospectuses and reports  used in connection with
the offering  of the  Fund's  shares to  other  than current  shareholders;  and
preparation,  printing  and  distribution of  sales  literature  and advertising
materials. In addition, the  Distributor may utilize fees  paid pursuant to  the
Plan  to compensate DWR and other  Selected Broker-Dealers for their opportunity
costs in advancing such
 
                                       14
<PAGE>
amounts,  which compensation would  be in the  form of a  carrying charge on any
unreimbursed expenses.
 
   
    For the fiscal year ended February 29, 1996, the Fund accrued payments under
the Plan amounting to $3,341,620, which amount  is equal to 0.95% of the  Fund's
average  daily net assets for the period.  These payments accrued under the Plan
were calculated pursuant  to clause (a)  of the compensation  formula under  the
Plan.
    
 
    At any given time, the 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 $1 million in expenses in  distributing
shares of the Fund had been incurred and $750,000 had been received as described
in  (i)  and  (ii) above,  the  excess  expense would  amount  to  $250,000. The
Distributor has  advised  the  Fund  that such  excess  amounts,  including  the
carrying  charge  described above,  totalled $12,450,717  at February  29, 1996,
which was equal to 3.46% of the Fund's net assets on such date.
 
    Because there  is no  requirement under  the Plan  that the  Distributor  be
reimbursed  for all  distribution expenses or  any requirement that  the Plan be
continued from year to year, such excess  amount, if any, does not constitute  a
liability of the Fund. Although there is no legal obligation for the Fund to pay
expenses  incurred in excess of payments made to the Distributor under the Plan,
and the proceeds  of contingent deferred  sales charges paid  by investors  upon
redemption of shares, if for any reason the Plan is terminated the Trustees will
consider at that time the manner in which to treat such expenses. Any cumulative
expenses incurred, but not yet recovered through distribution fees or contingent
deferred  sales charges, may or may not be recovered through future distribution
fees or contingent deferred sales charges.
 
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
domestic or foreign 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 Board of Trustees.
 
    Generally, trading in foreign securities, as well as corporate bonds, United
States government  securities and  money  market instruments,  is  substantially
completed  each day at  various times prior to  the close of  the New York Stock
Exchange. The values of such securities used in computing the net asset value of
the Fund's shares  are determined as  of such times.  Foreign currency  exchange
rates  are also generally  determined prior to  the close of  the New York Stock
Exchange. Occasionally, events which  affect the values  of such securities  and
such exchange rates may occur between the times at which they are determined and
the close of the New
 
                                       15
<PAGE>
York  Stock Exchange and will  therefore not be reflected  in the computation of
the Fund's net  asset value. If  events materially affecting  the value of  such
securities  occur during  such period, then  these securities will  be valued at
their fair value as determined in good faith under procedures established by and
under the supervision of some Trustees.
 
    Short-term debt securities with remaining  maturities of sixty days or  less
at  the  time of  purchase are  valued  at amortized  cost, unless  the Trustees
determine such does not reflect the securities' fair value, in which case  these
securities will be valued at their fair value as determined by the Trustees.
 
    Certain  of  the Fund's  portfolio securities  may be  valued by  an outside
pricing service approved by the Fund's Trustees. The pricing service may utilize
a matrix  system incorporating  security  quality, maturity  and coupon  as  the
evaluation model parameters, and/or research evaluations by its staff, including
review of broker-dealer market price quotations, in determining what it believes
is  the  fair  valuation of  the  portfolio  securities valued  by  such pricing
service.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND  DISTRIBUTIONS.  All income  dividends
and  capital gains distributions  are automatically paid  in full and fractional
shares of the  Fund (or,  if specified by  the shareholder,  any other  open-end
investment   company  for  which  InterCapital   serves  as  investment  manager
(collectively, with the Fund, the "Dean Witter Funds")), unless the  shareholder
requests  that they be paid  in cash. Shares as acquired  are not subject to the
imposition of  a contingent  deferred sales  charge upon  their redemption  (see
"Redemptions and Repurchases").
 
    INVESTMENT OF DISTRIBUTIONS RECEIVED IN CASH. Any shareholder who receives a
cash  payment representing a  dividend or capital  gains distribution may invest
such dividend or distribution at the  net asset value per share next  determined
after  receipt by the Transfer Agent, by  returning the check or the proceeds to
the Transfer Agent within thirty days after the payment date. Shares so acquired
are not subject  to the imposition  of a contingent  deferred sales charge  upon
their redemption (see "Redemptions and Repurchases").
 
    EASYINVEST-SM-.    Shareholders may  subscribe  to EasyInvest,  an automatic
purchase plan  which  provides  for  any  amount  from  $100  to  $5,000  to  be
transferred automatically from a checking or savings account, on a semi-monthly,
monthly  or quarterly basis, to  the Transfer Agent for  investment in shares of
the Fund (see  "Purchase of  Fund Shares"  and "Redemptions  and Repurchases  --
Involuntary Redemption").
 
    SYSTEMATIC  WITHDRAWAL PLAN.  A  systematic withdrawal plan (the "Withdrawal
Plan") is available  for shareholders  who own or  purchase shares  of the  Fund
having  a minimum value of $10,000 based  upon the then current net asset value.
The Withdrawal Plan provides  for monthly or  quarterly (March, June,  September
and  December) checks in any  dollar amount, not less than  $25, or in any whole
percentage of  the  account balance,  on  an annualized  basis.  Any  applicable
contingent  deferred sales charge  will be imposed on  shares redeemed under the
Withdrawal Plan  (See "Redemptions  and Repurchases--Contingent  Deferred  Sales
Charge").  Therefore, any shareholder participating  in the Withdrawal Plan will
have sufficient shares  redeemed from his  or her account  so that the  proceeds
(net of any applicable contingent deferred sales charge) to the shareholder will
be the designated monthly or quarterly amount.
 
    TAX-SHELTERED  RETIREMENT PLANS.  Retirement plans  are available for use by
corporations, the self-employed,  Individual Retirement  Accounts and  Custodial
Accounts  under Section 403(b)(7) of the Internal Revenue Code. Adoption of such
plans should be on advice of legal counsel or tax adviser.
 
                                       16
<PAGE>
    Shareholders should  contact  their  DWR  or  other  Selected  Broker-Dealer
account executive or the Transfer Agent for further information about any of the
above services.
 
EXCHANGE PRIVILEGE
 
    The  Fund  makes  available  to  its  shareholders  an  "Exchange Privilege"
allowing the exchange  of shares of  the Fund  for shares of  other Dean  Witter
Funds  sold  with a  contingent deferred  sales charge  ("CDSC funds"),  and for
shares of Dean Witter Short-Term  U.S. Treasury Trust, Dean Witter  Intermediate
Term  U.S. Treasury Trust, Dean Witter Short-Term Bond Fund, Dean Witter Limited
Term Municipal Trust,  Dean Witter  Balanced Income Fund,  Dean Witter  Balanced
Growth  Fund  and five  Dean  Witter Funds  which  are money  market  funds (the
foregoing eleven non-CDSC funds are hereinafter collectively referred to 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 to 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,  upon a
redemption of shares which  results in a  CDSC being imposed,  a credit (not  to
exceed  the amount of the CDSC) will be given in an amount equal to the Exchange
Fund  12b-1  distribution  fees  incurred  on  or  after  that  date  which  are
attributable  to  those  shares.  (Exchange  Fund  12b-1  distribution  fees are
described in the prospectuses for those funds.)
 
    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
consti-
 
                                       17
<PAGE>
tutes 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 of  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 have  been
exchanged, upon such notice as may be required by applicable regulatory agencies
(presently  sixty  days'  prior  written  notice  for  termination  or  material
revision), provided that six months' prior written notice of termination will be
given to  shareholders who  hold shares  of  an Exchange  Fund pursuant  to  the
Exchange  Privilege, and  provided further  that the  Exchange Privilege  may be
terminated  or  materially   revised  without  notice   under  certain   unusual
circumstances.  Shareholders  maintaining margin  accounts  with DWR  or another
Selected Dealer are referred to  their account executive regarding  restrictions
on exchange of shares of the Fund pledged in the margin account.
 
    The  current prospectus for each  fund describes its investment objective(s)
and policies, and  shareholders should obtain  a copy and  examine it  carefully
before  investing. Exchanges are  subject to the  minimum investment requirement
and any other conditions imposed by each  fund. 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 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  other Selected  Broker-Dealers  but who  wish  to make
exchanges directly by writing or  telephoning the Transfer Agent) must  complete
and  forward to  the Transfer  Agent an  Exchange Privilege  Authorization Form,
copies of  which  may  be obtained  from  the  Transfer Agent,  to  initiate  an
exchange. If the Authorization Form is used, exchanges may be made in writing or
by contacting the Transfer Agent at (800) 869-NEWS (toll free).
 
    The  Fund  will  employ  reasonable  procedures  to  confirm  that  exchange
instructions communicated over  the telephone are  genuine. Such procedures  may
include requiring various forms of personal identification such as name, mailing
address,  social security  or other tax  identification number and  DWR or other
Selected Broker-Dealer account number (if any). Telephone instructions may  also
be recorded. If such procedures are not employed, the Fund may be liable for any
losses due to unauthorized or fraudulent instructions.
 
    Telephone exchange instructions will be accepted if received by the Transfer
Agent  between 9:00 a.m. and 4:00  p.m., New York time, on  any day the New York
Stock Exchange is  open. Any  shareholder wishing to  make an  exchange who  has
previously  filed an Exchange Privilege Authorization  Form and who is unable to
reach the Fund  by telephone should  contact his  or her DWR  or other  Selected
Broker-Dealer  account  executive, if  appropriate, or  make a  written exchange
request. Shareholders are  advised that  during periods of  drastic economic  or
market  changes, it  is possible that  the telephone exchange  procedures may be
difficult to implement, although this has not been the experience with the  Dean
Witter Funds in the past.
 
                                       18
<PAGE>
    Shareholders  should  contact  their  DWR  or  other  Selected Broker-Dealer
account executive  or  the Transfer  Agent  for further  information  about  the
Exchange Privilege.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.   Shares of the Fund can be redeemed for cash at any time at 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(s), 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, 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
 
                                       19
<PAGE>
    (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, 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 share  certificate which is delivered to  any
of  their  offices.  Shares held  in  a  shareholder's account  without  a share
certificate may also  be repurchased  by DWR and  other Selected  Broker-Dealers
upon  the telephonic request of the shareholder. The repurchase price is the net
asset value next computed (see "Purchase of Fund Shares") after such  repurchase
order  is  received  by DWR  or  other  Selected Broker-Dealer,  reduced  by any
applicable CDSC.
 
    The CDSC, if any, will be the only fee imposed upon redemption by either the
Fund, the Distributor or DWR or  other Selected Broker-Dealer. The offer by  DWR
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  thirty  days  after  the  date  of  the  redemption  or
repurchase,  reinstate any portion or all of  the proceeds of such redemption or
repurchase in shares of the Fund at their net asset value next determined  after
a reinstatement request, together with the proceeds, is received by the Transfer
Agent  and receive a pro-rata  credit for any CDSC  paid in connection with such
redemption or repurchase.
 
    INVOLUNTARY REDEMPTION.   The Fund reserves  the right to  redeem, on  sixty
days'  notice and at net asset value,  the shares of any shareholder (other than
shares held  in an  Individual  Retirement Account  or Custodial  Account  under
Section  403(b)(7) of the Internal Revenue Code) whose shares due to redemptions
by the shareholder have a value of less  than $100 or such lesser amount as  may
be fixed by the Trustees or, in the case of an
 
                                       20
<PAGE>
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  him or her sixty days to make an additional investment in an amount which
will increase the value of his or her account to at least the applicable  amount
before  the redemption is processed. No CDSC  will be imposed on any involuntary
redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS AND  DISTRIBUTIONS.   The Fund  intends to  pay dividends  and  to
distribute  substantially all of  its net investment  income quarterly. The Fund
intends to  distribute capital  gains, if  any, once  each year.  The Fund  may,
however,  determine  either  to distribute  or  to  retain all  or  part  of any
long-term capital gains in any year for reinvestment.
 
    All dividends and any capital gains distributions will be paid in additional
Fund shares  and automatically  credited to  the shareholder's  account  without
issuance  of a share certificate unless the shareholder requests in writing that
all  dividends  and/or  distributions  be   paid  in  cash.  (See   "Shareholder
Services--Automatic Investment of Dividends and Distributions".)
 
    TAXES.   Because the  Fund intends to  distribute all of  its net investment
income and net  short-term capital  gains to shareholders  and otherwise  remain
qualified  as a regulated investment company  under Subchapter M of the Internal
Revenue Code, it  is not  expected that  the Fund will  be required  to pay  any
Federal  income  tax on  any such  income and  capital gains.  Shareholders will
normally have to pay Federal income taxes, and any state and local income taxes,
on the dividends and distributions they receive from the Fund.
 
    Distributions of net investment income and net short-term capital gains  are
taxable to the shareholder as ordinary dividend income regardless of whether the
shareholder  receives such distributions  in additional shares  or in cash. Some
part of  such  dividends and  distributions  may  be eligible  for  the  Federal
dividends received deduction available to the Fund's corporate shareholders.
 
    Distributions  of  net  long-term  capital gains,  if  any,  are  taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. Capital  gains distributions are not eligible  for
the dividends received deduction.
 
    After  the  end  of  the  calendar  year,  shareholders  will  be  sent full
information on their dividends and capital gains distributions for tax purposes.
To avoid  being subject  to a  31%  Federal backup  withholding tax  on  taxable
dividends,  capital  gains distributions  and  the proceeds  of  redemptions and
repurchases, shareholders' taxpayer identification numbers must be furnished and
certified as to their accuracy.
 
    Dividends, interest  and  gains  received  by the  Fund  may  give  rise  to
withholding  and other taxes  imposed by foreign countries.  If it qualifies for
and makes the appropriate election with  the Internal Revenue Service, the  Fund
will  report annually to its shareholders the  amount per share of such taxes to
enable shareholders to  claim United  States foreign tax  credits or  deductions
with  respect to such taxes. In the absence  of such an election, the Fund would
deduct foreign tax in computing the amount of its distributable income.
 
    Shareholders should consult their  tax advisers as  to the applicability  of
the foregoing to their current situation.
 
                                       21
<PAGE>
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From  time to time the  Fund may quote its  "total return" in advertisements
and sales literature.  The total  return of the  Fund is  based upon  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 a period of one year  as well as over the life of the Fund.
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 incurred by shareholders, for the stated periods.  It
also assumes reinvestment of all dividends and distributions paid by the Fund.
 
    In  addition to the foregoing, the Fund  may advertise its total return over
different periods of time  by means of aggregate,  average, and year-by-year  or
other  types of total return figures. The  Fund may also advertise the growth of
hypothetical investments of $10,000, $50,000 and $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 beneficial  interest of the Fund are of  $0.01
par value and are equal as to earnings, assets and voting privileges.
 
    The  Fund is  not required  to hold Annual  Meetings of  Shareholders and in
ordinary circumstances  the Fund  does not  intend to  hold such  meetings.  The
Trustees  may call  Special Meetings of  Shareholders for  action by shareholder
vote as may be required  by the Act or the  Declaration of Trust. Under  certain
circumstances  the Trustees may be  removed by action of  the Trustees or by the
shareholders.
 
    Under Massachusetts law, shareholders of a business trust may, under certain
circumstances, be  held personally  liable as  partners for  obligations of  the
Fund.  However,  the  Declaration of  Trust  contains an  express  disclaimer of
shareholder liability for acts  or obligations of the  Fund, requires that  Fund
obligations  include  such  disclaimer,  and  provides  for  indemnification and
reimbursement of expenses out  of the Fund's property  for any shareholder  held
personally  liable  for  the  obligations  of the  Fund.  Thus,  the  risk  of a
shareholder incurring  financial loss  on account  of shareholder  liability  is
limited  to circumstances in which  the Fund itself would  be unable to meet its
obligations. Given the above limitations on shareholder personal liability,  and
the  nature of the Fund's assets and operations, in the opinion of Massachusetts
counsel to the Fund, the risk to shareholders of personal liability is remote.
 
    CODE OF ETHICS.   Directors,  officers and employees  of InterCapital,  Dean
Witter Services Company Inc. and the Distributor are subject to a strict Code of
Ethics adopted by those companies. The Code of Ethics is intended to ensure that
the interests of shareholders and other clients are placed ahead of any personal
interest,  that no undue personal benefit is obtained from a person's employment
activities and that actual and potential  conflicts of interest are avoided.  To
achieve  these goals and comply with regulatory requirements, the Code of Ethics
requires, among other things, that personal securities transactions by employees
of the companies be subject to an  advance clearance process to monitor that  no
Dean  Witter Fund is engaged at the same time  in a purchase or sale of the same
security. The  Code of  Ethics bans  the purchase  of securities  in an  initial
public offering,
 
                                       22
<PAGE>
and also prohibits engaging in futures and options transactions and profiting on
short-term  trading (that is, a  purchase within sixty days of  a sale or a sale
within sixty  days  of  a  purchase) of  a  security.  In  addition,  investment
personnel  may not purchase or sell a security for their personal account within
thirty days before or after any transaction  in any Dean Witter 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.
 
                                       23
<PAGE>
 
Dean Witter
Global Utilities Fund
                                    Dean Witter
Two World Trade Center
New York, New York 10048
TRUSTEES                            Global
Michael Bozic                       Utilities
Charles A. Fiumefreddo              Fund
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
Edward F. Gaylor
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 26, 1996


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