DEAN WITTER PREMIER INCOME TRUST
497, 1995-01-11
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<PAGE>
              PROSPECTUS
              JANUARY 11, 1995

              Dean Witter Premier Income Trust (the "Fund") is an open-end,
diversified management investment company, whose investment objective is to earn
a high level of current income consistent with low volatility of principal. The
Fund seeks to achieve its investment objective by investing primarily in high
quality fixed rate and adjustable rate mortgage-backed securities and other
asset-backed securities which either are issued or guaranteed by the United
States Government, its agencies or instrumentalities, or rated Aaa by Moody's
Investors Service, Inc. or AAA by Standard & Poor's Corporation or, if not
rated, determined to be of comparable quality. See "Investment Objective and
Policies."

               Shares of the Fund are offered at net asset value plus a sales
charge of 3.0% of the offering price, scaled down on purchases of $100,000 or
more. In addition, pursuant to a Rule 12b-1 Plan of Distribution under the
Investment Company Act of 1940, the Fund may reimburse the Distributor, in an
amount equal to payments not exceeding the annual rate of 0.20% of the average
daily net assets of the Fund, for specific expenses incurred in promoting the
distribution of the Fund's shares.

               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 January 11, 1995, 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/6
   Risk Considerations/13
Investment Restrictions/16
Purchase of Fund Shares/17
Shareholder Services/20
Redemptions and Repurchases/22
Dividends, Distributions and Taxes/23
Performance Information/24
Additional Information/25

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
    Premier Income Trust
    Two World Trade Center
    New York, New York 10048
    (212) 392-2550 or
    (800) 526-3143
<PAGE>
PROSPECTUS SUMMARY
--------------------------------------------------------------------------------

<TABLE>
<S>                 <C>
The                 The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open-end,
Fund                diversified management investment company investing primarily in high-quality fixed rate and adjustable rate
                    mortgage-backed securities and in asset-backed securities.
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Shares Offered      Shares of beneficial interest with $0.01 par value (see page 24).
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Offering            The price of the shares offered by this prospectus varies with the changes in the value of the Fund's
Price               investments. The offering price, determined once daily as of 4:00 p.m., New York time, on each day that the New
                    York Stock Exchange is open, is equal to the net asset value plus a sales charge of 3.0% of the offering price,
                    scaled down on purchases of $100,000 or over (see page 17).
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Minimum             Minimum initial investment, $1,000. Minimum subsequent investment, $100 (see page 17).
Purchase
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Investment          The investment objective of the Fund is to earn a high level of current income consistent with low volatility of
Objective           principal.
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Investment Manager  Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the Fund, and its wholly-owned
and                 subsidiary, Dean Witter Services Company Inc., serve in various investment management, advisory, management and
Sub-Advisor         administrative capacities to ninety investment companies and other portfolios with assets of approximately $67.8
                    billion at November 30, 1994. BlackRock Financial Management L.P. (the "Sub-Advisor") has been retained by the
                    Investment Manager to provide investment advice and manage the Fund's portfolio. The Sub-Advisor currently
                    serves as the investment adviser to fixed income investors in the United States and overseas through funds with
                    combined net assets in excess of $22 billion (see page 5).
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Management Fee      The Investment Manager receives a monthly fee at the annual rate of 0.50% of daily net assets. The Sub-Advisor
                    receives a monthly fee from the Investment Manager equal to 40% of the Investment Manager's monthly fee (see
                    page 5).
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Dividends           Income dividends are declared daily and paid monthly; capital gains distributions, if any, are paid at least
                    annually. Income dividends and capital gains distributions are automatically reinvested in additional shares at
                    net asset value unless the shareholder elects to receive cash.
------------------------------------------------------------------------------------------------------------------------------------
Plan of             The Fund is authorized to reimburse Dean Witter Distributors Inc. (the "Distributor") for specific expenses
Distribution        incurred in promoting the distribution of the Fund's shares pursuant to a Plan of Distribution pursuant to Rule
                    12b-1 under the Investment Company Act of 1940. Reimbursement may in no event exceed an amount equal to payments
                    at the annual rate of 0.20 of 1% of average daily net assets of the Fund (see page 18). The Distributor also
                    receives a sales charge of 3% of the offering price.
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Special Risk        The net asset value of the Fund's shares will fluctuate with changes in the market value of its portfolio
Considerations      securities. Mortgage-backed and asset-backed securities have different characteristics than traditional debt
                    securities, primarily in that interest and principal payments are made more frequently, usually monthly, and
                    that principal may be prepaid at any time (see page 7). Mortgage-backed and asset-backed securities generally
                    decrease in value as a result of increases in interest rates and may benefit less than other fixed-income
                    securities from declining interest rates because of prepayment risks. The types of mortgage-backed securities in
                    which the Fund may invest include derivative products such as collateralized mortgage obligations and stripped
                    mortgage-backed securities, which are highly sensitive to changes in prepayment and interest rates and have
                    special characteristics and risks (see pages 8 and 9). Asset-backed securities involve certain risks not posed
                    by mortgage-backed securities, resulting mainly from the fact that asset-backed securities do not usually
                    contain the complete benefit of a security interest in the related collateral (see page 10). In addition, the
                    Fund may utilize certain investment techniques, including options and futures for hedging purposes, and the use
                    of leverage, including reverse repurchase agreements and dollar rolls, which entail additional risks (see pages
                    10-15).
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Reduced Sales       Right of Accumulation; Letter of Intent; Automatic Investment of Dividends and Distributions; EasyInvestSM;
Charges and         Systematic Withdrawal Plan; Exchange Privilege (see pages 18-21).
Shareholder
Services
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</TABLE>

  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
                                   ELSEWHERE
        IN THIS PROSPECTUS AND 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
year ended October 31, 1994.

    The  following table illustrates all expenses and fees that a shareholder of
the Fund will incur.

<TABLE>
<S>                                                                                    <C>
SHAREHOLDER TRANSACTION EXPENSES
-------------------------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases
  (as a percentage of offering price)................................................   3.0 %
Maximum Sales Charge Imposed on Reinvested Dividends.................................   None
Deferred Sales Charge................................................................   None
Redemption Fees......................................................................   None
Exchange Fee.........................................................................   None
ANNUAL FUND EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
-------------------------------------------------------------------------------------
Management Fees......................................................................  0.50 %
12b-1 Fees*..........................................................................  0.18 %
Other Expenses.......................................................................  0.90 %
Total Fund Expenses..................................................................  1.58 %
<FN>
------------
* THE 12B-1 FEE IS CHARACTERIZED AS A SERVICE FEE WITHIN THE MEANING OF NATIONAL
  ASSOCIATION OF SECURITIES DEALERS, INC. ("NASD") GUIDELINES.
</TABLE>

<TABLE>
<CAPTION>
EXAMPLE                                                                   1 year       3 years      5 years     10 years
----------------------------------------------------------------------  -----------  -----------  -----------  -----------
<S>                                                                     <C>          <C>          <C>          <C>
You would pay the following expenses on a $1,000 investment,  assuming
 (1)  5% annual  return and  (2) redemption  at the  end of  each time
 period...............................................................   $      46    $      78    $     113    $     212
</TABLE>

    THE ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST  OR
FUTURE  EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF THE FUND MAY BE MORE 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" and "Purchase of Fund Shares."

    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 and  the data relating  to debt  outstanding
have  been audited by  Price Waterhouse LLP,  independent accountants. This data
should be read in conjunction with the financial statements, notes thereto,  and
the  unqualified report  of independent accountants  which are  contained in the
Statement of Additional Information.  Further information about the  performance
of  the Fund is contained in the Fund's Annual Report to Shareholders, which may
be obtained without charge upon request to the Fund.

<TABLE>
<CAPTION>
                                                                                          FOR THE
                                                                                           PERIOD
                                                                                          JULY 1,
                                                                FOR THE YEAR ENDED         1991*
                                                                   OCTOBER 31,            THROUGH
                                                           ----------------------------   OCTOBER
                                                             1994      1993      1992     31, 1991
                                                           ---------  -------   -------   --------
<S>                                                        <C>        <C>       <C>       <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period.....................      $9.18    $9.69     $9.95     $9.60
                                                           ---------  -------   -------   --------
Net investment income....................................       0.54     0.73      0.71      0.26
Net realized and unrealized gain (loss) on investments...      (0.41)   (0.45)    (0.21)     0.37
                                                           ---------  -------   -------   --------
Total from investment operations.........................       0.13     0.28      0.50      0.63
                                                           ---------  -------   -------   --------
Less dividends and distributions from:
    Net investment income................................      (0.54)   (0.61)    (0.71)    (0.26)
    Net realized gain on investments.....................     --        (0.18)    (0.05)    (0.02)
                                                           ---------  -------   -------   --------
Total dividends and distributions........................      (0.54)   (0.79)    (0.76)    (0.28)
                                                           ---------  -------   -------   --------
Net asset value, end of period...........................      $8.77    $9.18     $9.69     $9.95
                                                           ---------  -------   -------   --------
                                                           ---------  -------   -------   --------
TOTAL INVESTMENT RETURN+.................................       1.44%    2.87%     5.18%     6.41%(1)
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period (in thousands).................    $43,875  $90,260   $154,860  $132,219
Ratios of expenses to average net assets:
  Operating expenses.....................................       1.24%    0.95%     0.99%     0.85%(2)
  Interest expense.......................................       0.34%    0.65%     0.61%     0.84%(2)
    Total expenses.......................................       1.58%    1.60%     1.60%     1.69%(2)(3)
Ratio of net investment income to average net assets.....       5.32%    7.32%     7.05%     7.50%(2)(3)
Portfolio turnover rate..................................        393%     412%      254%       91%(1)
<FN>
------------------------
 *   COMMENCEMENT OF OPERATIONS.
 +   DOES NOT REFLECT THE DEDUCTION OF SALES LOAD.
(1)  NOT ANNUALIZED.
(2)  ANNUALIZED.
(3)  IF THE FUND  HAD BORNE  ALL EXPENSES THAT  WERE ASSUMED  BY THE  INVESTMENT
     MANAGER,  THE ABOVE ANNUALIZED  EXPENSE RATIO WOULD  HAVE BEEN 1.85% ($.065
     PER SHARE) AND THE ABOVE ANNUALIZED NET INVESTMENT INCOME RATIO WOULD  HAVE
     BEEN 7.34% ($.253 PER SHARE).
</TABLE>

   
                       SEE NOTES TO FINANCIAL STATEMENTS
                   IN THE STATEMENT OF ADDITIONAL INFORMATION
    

   
<TABLE>
<CAPTION>
                                                AMOUNT OF       AVERAGE AMOUNT      AVERAGE NUMBER     AVERAGE AMOUNT
                                                   DEBT            OF DEBT          OF FUND SHARES     OF FUND'S DEBT
                                              OUTSTANDING AT  OUTSTANDING DURING  OUTSTANDING DURING      PER SHARE
YEAR                                          END OF PERIOD       THE PERIOD          THE PERIOD      DURING THE PERIOD
--------------------------------------------  --------------  ------------------  ------------------  -----------------
<S>                                           <C>             <C>                 <C>                 <C>
1994........................................  $          -0-   $      5,928,019           6,842,596       $   0.87
1993........................................  $   10,855,000   $     24,425,664          13,722,283       $   1.78
1992........................................  $    8,600,000   $     20,123,140          14,571,640       $   1.38
1991........................................  $   34,909,000   $     17,673,706          12,163,651       $   1.45
</TABLE>
    

                                       4
<PAGE>
THE FUND AND ITS MANAGEMENT
--------------------------------------------------------------------------------

    Dean  Witter Premier Income  Trust (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
Massachusetts on March 27, 1991.

    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  investment companies, thirty  of which are
listed  on  the  New  York  Stock  Exchange,  with  combined  total  assets   of
approximately  $65.8 billion at  November 30, 1994.  The Investment Manager also
manages  and  advises  portfolios  of  pension  plans,  other  institutions  and
individuals which aggregated approximately $2.0 billion at such date.

    The  Fund  has retained  the  Investment Manager  to  provide administrative
services, manage its business affairs and supervise the investment of the Fund's
assets. InterCapital has retained Dean  Witter Services Company Inc. to  perform
the aforementioned administrative services for the Fund.

    Under  a Sub-Advisory Agreement between  BlackRock Financial Management L.P.
(the "Sub-Advisor") and  the Investment  Manager, the  Sub-Advisor provides  the
Fund  with investment  advice and  portfolio management  relating to  the Fund's
investments in portfolio securities, subject  to the overall supervision of  the
Investment  Manager. The Fund's Trustees review the various services provided by
or under the direction of the  Investment Manager and the Sub-Advisor 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.

    The Sub-Advisor, whose address is 345 Park Avenue, New York, New York 10154,
is a Delaware limited partnership organized in April, 1988 by Laurence D.  Fink,
Ralph  L. Schlosstein and The Blackstone  Group (a private investment bank). The
Sub-Advisor's general partners are Messrs.  Fink and Schlosstein and  Blackstone
Financial  Management Inc. (all the  stock of which is  owned by partners of The
Blackstone Group). The Sub-Advisor serves as investment adviser to  fixed-income
investors  in the U.S.  and overseas with  combined net assets  in excess of $22
billion as of November 30, 1994.

    On June 16, 1994, the partners of the Sub-Adviser entered into a  definitive
agreement  to sell their  partnership interests in the  Sub-Adviser to PNC Bank,
N.A. ("PNC"), headquartered in Pittsburgh, Pennsylvania (the "Transaction"). The
Transaction, which was subject to bank regulatory approval, is expected to close
in early 1995 and  is subject to  various conditions. After  the closing of  the
Transaction,  BlackRock will retain its name and will continue to operate out of
its New York  office. All members  of the Sub-Adviser's  senior management  team
have  agreed to sign long-term employment  contracts and will be responsible for
managing the day-to-day affairs of the Sub-Adviser. Following the closing of the
Transaction, the Sub-Adviser will become a wholly owned corporate subsidiary  of
PNC Asset Management Group, Inc., the holding company for PNC's asset management
business.

    PNC is a commercial bank offering a wide range of domestic and international
commercial  banking, retail  banking and  trust services  to its  customers. Its
principal office is located in Pittsburgh, Pennsylvania.

                                       5
<PAGE>
    PNC is a wholly-owned  indirect subsidiary of PNC  Bank Corp. (the  "Holding
Company"),  a bank holding company organized  under the laws of the Commonwealth
of Pennsylvania.

    In order to assure continuity of investment advisory services to the Fund by
the Sub-Adviser after the  Transaction, the Board met  in person on October  20,
1994,  for the purpose of considering whether  it would be in the best interests
of the  Fund  and  its  shareholders  for  InterCapital  to  enter  into  a  new
sub-advisory  agreement with the Sub-Adviser  (the "New Sub-Advisory Agreement")
to take effect upon consummation of the Transaction. At its meeting, the  Board,
including  each of the Trustees who are not "interested persons" of the Fund, as
that term is defined in the  1940 Act (the "Independent Trustees"),  unanimously
approved  the  New Sub-Advisory  Agreement and  recommended  it for  approval by
Shareholders. The  New  Sub-Advisory  Agreement  is  identical  to  the  current
Sub-Advisory  Agreement except for the effective  date and the stated expiration
date. The meeting of Shareholders will take place on or about February 17, 1995.

    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
annual  rate of 0.50% to the Fund's net assets. As compensation for its services
provided pursuant to the Sub-Advisory Agreement, the Investment Manager pays the
Sub-Advisor monthly compensation equal to 40% of its monthly compensation.

    For the  fiscal  year  ended  October  31,  1994,  the  Fund  accrued  total
compensation  to the Investment Manager amounting to 0.50% of the Fund's average
daily net assets (of which 40% was accrued to the Sub-Advisor by the  Investment
Manager)  and the Fund's total expenses amounted  to 1.58% of the Fund's average
daily net assets.

INVESTMENT OBJECTIVE AND POLICIES
--------------------------------------------------------------------------------

    The investment objective  of the Fund  is to  earn a high  level of  current
income  consistent  with  low  volatility of  principal.  The  Fund's investment
objective is a  fundamental policy and  may not be  changed without  shareholder
approval.  There  is  no assurance  that  the  objective will  be  achieved. The
following policies may be changed by  the Board of Trustees without  shareholder
approval.

    The Fund seeks to achieve its investment objective by investing under normal
circumstances  at least 65% of its total assets in (i) fixed rate and adjustable
rate  mortgage-backed   securities  ("Mortgage-Backed   Securities")  and   (ii)
securities backed by other assets, such as automobile or credit card receivables
and  home equity loans ("Asset-Backed Securities").  The Fund will only purchase
Mortgage-Backed Securities  and  Asset-Backed  Securities which  are  issued  or
guaranteed by the United States Government, its agencies or instrumentalities or
are  rated Aaa by Moody's Investors Service, Inc. ("Moody's") or AAA by Standard
& Poor's Corporation ("S&P")  or, if not rated,  determined to be of  comparable
quality  by the Investment Manager and  the Sub-Advisor. (Currently there are no
Asset-Backed Securities issued  or guaranteed by  the United States  Government,
its   agencies  or  instrumentalities.)  The  Fund  expects  that  under  normal
circumstances the market value dollar weighted average life (or period until the
next reset date) of the Fund's portfolio securities will be no greater than five
years.

    The Fund  seeks to  achieve low  volatility by  investing in  a  diversified
portfolio of securities which the Investment Manager and the Sub-Advisor believe
will,  in  the aggregate,  be resistant  to  significant fluctuations  in market
value. The Investment Manager and  Sub-Advisor believe that the Fund's  policies
of  purchasing  shorter term  Mortgage-Backed  and Asset-Backed  Securities will
reduce  the  volatility   of  the  Fund's   net  asset  value   over  the   long

                                       6
<PAGE>
term.  Although the values of  fixed-income securities generally increase during
periods of declining interest  rates and decrease  during periods of  increasing
interest rates, the extent of these fluctuations has historically generally been
smaller  for short term  securities than for  securities with longer maturities.
Conversely, the yield available on  short term securities has also  historically
been lower on average than those available from longer term securities.

    While   the  Fund  invests  primarily   in  Mortgage-Backed  Securities  and
Asset-Backed Securities, under ordinary circumstances it may invest up to 35% of
its total assets in (i) U.S. Government securities (securities guaranteed as  to
principal   and   interest   by   the  United   States   or   its   agencies  or
instrumentalities), (ii) corporate  debt securities,  including adjustable  rate
securities,  rated Aaa by Moody's or AAA by S&P or, if unrated, determined to be
of comparable quality by the Fund's Trustees, (iii) with respect to up to 5%  of
the  Fund's  total assets,  high  quality municipal  securities,  including zero
coupon securities, with  the highest  rating by Moody's  or S&P,  or (iv)  money
market  instruments. U.S.  Government securities  in which  the Fund  may invest
include Treasury bills, notes and bonds, including zero coupon securities. 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; 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, issued by a company having an outstanding debt issue rated AAA by S&P
or Aaa by Moody's.

    In an effort to increase investment return or to hedge the Fund's portfolio,
the  Fund  may  engage  in  various  investment  techniques,  including  reverse
repurchase agreements,  dollar  rolls,  purchasing  and  selling  call  and  put
options,  entering  into interest  rate futures  contracts and  related options,
purchasing securities on a when-issued,  delayed delivery or forward  commitment
basis and lending portfolio securities (see "Other Investment Policies" below).

    There  may be periods during which, in the opinion of the Investment Manager
and the Sub-Advisor, 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 total assets are  invested
in U.S. Government securities, money market instruments or cash.

MORTGAGE-BACKED SECURITIES

    Mortgage-Backed  Securities  are  securities  that  directly  or  indirectly
represent a participation in, or are secured by and payable from, mortgage loans
secured by real  property. The  term Mortgage-Backed Securities  as used  herein
includes  adjustable rate  mortgage securities and  derivative mortgage products
such as collateralized mortgage obligations, stripped Mortgage-Backed Securities
and other products described below.

    There are currently  three basic  types of  Mortgage-Backed Securities:  (i)
those  issued  or guaranteed  by  the United  States  Government or  one  of its
agencies  or  instrumentalities,  such  as  the  Government  National   Mortgage
Association ("GNMA"), the Federal National Mortgage Association ("FNMA") and the
Federal Home Loan Mortgage Corporation ("FHLMC") (securities issued by GNMA, but
not  those issued by FNMA or FHLMC, are backed by the "full faith and credit" of
the United  States); (ii)  those issued  by private  issuers that  represent  an
interest  in  or  are  collateralized by  Mortgage-Backed  Securities  issued or
guaranteed  by  the  United  States  Government  or  one  of  its  agencies   or
instrumentalities;  and (iii) those issued by  private issuers that represent an
interest in or  are collateralized  by whole mortgage  loans or  Mortgage-Backed
Securities  without  a  government guarantee  but  usually having  some  form of
private credit enhancement.

    The Fund  will  invest  in  mortgage  pass-through  securities  representing
participation  interests in  pools of  residential mortgage  loans originated by
United States governmental or private lenders and

                                       7
<PAGE>
guaranteed, to the  extent provided  in such  securities, by  the United  States
Government  or one of its agencies  or instrumentalities. Such securities, which
are  ownership  interests  in  the   underlying  mortgage  loans,  differ   from
conventional  debt securities, which provide for periodic payment of interest in
fixed amounts (usually semiannually)  and principal payments  at maturity or  on
specified  call  dates.  Mortgage pass-through  securities  provide  for monthly
payments that  are  a  "pass-through"  of the  monthly  interest  and  principal
payments  (including any  prepayments) made by  the individual  borrowers on the
pooled mortgage loans, net of any fees paid to the guarantor of such  securities
and the servicer of the underlying mortgage loans.

    The  mortgage pass-through securities  in which the  Fund may invest include
those issued or guaranteed by GNMA, FNMA and FHLMC. GNMA certificates are direct
obligations of the U.S. Government and, as  such, are backed by the "full  faith
and credit" of the United States. FNMA is a federally chartered, privately owned
corporation  and FHLMC is a corporate instrumentality of the United States. FNMA
and FHLMC certificates are not backed by the full faith and credit of the United
States but the  issuing agency or  instrumentality has the  right to borrow,  to
meet  its obligations, from an  existing line of credit  with the U.S. Treasury.
The U.S. Treasury has no legal obligation to provide such line of credit and may
choose not to do so. Each of GNMA, FNMA and FHLMC guarantee timely  distribution
of  interest  to  certificate  holders.  GNMA  and  FNMA  also  guarantee timely
distribution of scheduled  principal payments. FHLMC  generally guarantees  only
the ultimate collection of principal of the underlying mortgage loans.

    Certificates  for  Mortgage-Backed  Securities  evidence  an  interest  in a
specific pool of  mortgages. These  certificates are, in  most cases,  "modified
pass-through"  instruments, wherein the issuing agency guarantees the payment of
principal and interest on mortgages underlying the certificates, whether or  not
such amounts are collected by the issuer on the underlying mortgages.

    ADJUSTABLE RATE MORTGAGE SECURITIES.  The Fund may also invest in adjustable
rate  mortgage securities  ("ARMs"), which are  pass-through mortgage securities
collateralized by  mortgages  with  adjustable rather  than  fixed  rates.  ARMs
eligible  for inclusion in a mortgage pool generally provide for a fixed initial
mortgage interest  rate for  either the  first three,  six, twelve  or  thirteen
scheduled  monthly  payments.  Thereafter,  the interest  rates  are  subject to
periodic adjustment based on changes to a designated benchmark index.

    ARMs contain maximum and  minimum rates beyond  which the mortgage  interest
rate  may not vary over the lifetime  of the security. In addition, certain ARMs
provide for additional limitations on the  maximum amount by which the  mortgage
interest  rate  may  adjust  for any  single  adjustment  period. Alternatively,
certain ARMs contain limitations on changes in the required monthly payment.  In
the  event that a monthly payment is not sufficient to pay the interest accruing
on an ARM, any  such excess interest  is added to the  principal balance of  the
mortgage  loan, which is repaid through  future monthly payments. If the monthly
payment for such an instrument  exceeds the sum of  the interest accrued at  the
applicable  mortgage interest  rate and the  principal payment  required at such
point to amortize the outstanding principal  balance over the remaining term  of
the  loan,  the excess  is  utilized to  reduce  the then  outstanding principal
balance of the ARM.

    PRIVATE MORTGAGE  PASS-THROUGH  SECURITIES.  Private  mortgage  pass-through
securities  are  structured  similarly  to the  GNMA,  FNMA  and  FHLMC mortgage
pass-through securities  and  are issued  by  originators of  and  investors  in
mortgage  loans,  including  savings  and  loan  associations,  mortgage  banks,
commercial banks,  investment  banks and  special  purpose subsidiaries  of  the
foregoing.  These securities usually are backed  by a pool of conventional fixed
rate or  adjustable rate  mortgage loans.  Since private  mortgage  pass-through
securities typically are not guaranteed by an entity having the credit status of
GNMA, FNMA and FHLMC, such

                                       8
<PAGE>
securities   generally  are  structured  with  one   or  more  types  of  credit
enhancement. Types  of credit  enhancements  are described  under  "Asset-Backed
Securities" below.

    COLLATERALIZED    MORTGAGE    OBLIGATIONS   AND    MULTICLASS   PASS-THROUGH
SECURITIES.  Collateralized mortgage obligations or "CMOs" are debt  obligations
collateralized by mortgage loans or mortgage pass-through securities. Typically,
CMOs  are collateralized by  GNMA, FNMA or  FHLMC Certificates, but  also may be
collateralized by whole loans or private mortgage pass-through securities  (such
collateral   collectively  hereinafter   referred  to   as  "Mortgage  Assets").
Multiclass pass-through securities are equity  interests in a trust composed  of
Mortgage  Assets. Payments of principal of  and interest on the Mortgage Assets,
and any reinvestment income  thereon, provide the funds  to pay debt service  on
the  CMOs  or  make  scheduled  distributions  on  the  multiclass  pass-through
securities. CMOs may be  issued by agencies or  instrumentalities of the  United
States  government,  or by  private originators  of,  or investors  in, mortgage
loans, including  savings  and  loan associations,  mortgage  banks,  commercial
banks,  investment banks and special purpose  subsidiaries of the foregoing. The
issuer of a series  of CMOs may elect  to be treated as  a Real Estate  Mortgage
Investment   Conduit  ("REMIC").  REMICs  include  governmental  and/or  private
entities that issue a  fixed pool of  mortgages secured by  an interest in  real
property.  REMICs are  similar to  CMOs in that  they issue  multiple classes of
securities, but  unlike  CMOs, which  are  required  to be  structured  as  debt
securities,  REMICs may  be structured  as indirect  ownership interests  in the
underlying assets of the REMICs themselves. However, there are no effects on the
Fund from investing in CMOs issued by  entities that have elected to be  treated
as  REMICs, and all  future references to  CMOs shall also  be deemed to include
REMICs.

    In a CMO, a series of bonds  or certificates is issued in multiple  classes.
Each  class of CMOs, often  referred to as a "tranche",  is issued at a specific
fixed or floating coupon  rate and has a  stated maturity or final  distribution
date.  Principal prepayments  on the  Mortgage Assets may  cause the  CMOs to be
retired substantially earlier than their stated maturities or final distribution
dates. Interest is  paid or accrues  on all classes  of the CMOs  on a  monthly,
quarterly  or  semiannual  basis. Certain  CMOs  may have  variable  or floating
interest rates and  others may be  stripped (securities which  provide only  the
principal or interest feature of the underlying security).

    The  principal of and interest on the Mortgage Assets may be allocated among
the several classes of a  CMO series in a  number of different ways.  Generally,
the  purpose of the allocation of the cash  flow of a CMO to the various classes
is to obtain a more predictable cash flow to the individual tranches than exists
with the  underlying  collateral  of  the  CMO. As  a  general  rule,  the  more
predictable  the cash flow is on a  CMO tranche, the lower the anticipated yield
will be on that tranche  at the time of  issuance relative to prevailing  market
yields  on Mortgage-Backed Securities.  As part of the  process of creating more
predictable cash flows on most of the tranches in a series of CMOs, one or  more
tranches  generally must be  created that absorb  most of the  volatility in the
cash flows on the underlying mortgage loans. The yields on these tranches, which
may include  Stripped  Mortgage-Backed Securities  as  described below,  may  be
higher  than prevailing market yields on Mortgage-Backed Securities with similar
maturities. As a result of the uncertainty of the cash flows of these  tranches,
the market prices of and yield on these tranches tend to be more volatile.

    The  Fund also  may invest  in, among  other things,  parallel pay  CMOs and
Planned Amortization Class CMOs ("PAC Bonds"). Parallel pay CMOs are  structured
to  provide payments of principal  on each payment date  to more than one class.
These simultaneous payments  are taken  into account in  calculating the  stated
maturity date or final distribution date of each class, which, as with other CMO
structures,  must be retired  by its stated maturity  date or final distribution
date but may be retired

                                       9
<PAGE>
earlier. PAC Bonds generally require payments of a specified amount of principal
on each payment date. PAC Bonds always  are parallel pay CMOs with the  required
principal  payment on such securities having the highest priority after interest
has been paid to all classes.

    STRIPPED MORTGAGE-BACKED SECURITIES. Stripped Mortgage-Backed Securities are
derivative multiclass mortgage  securities. Stripped Mortgage-Backed  Securities
may  be issued by agencies or instrumentalities of the United States government,
or by private originators of, or investors in, mortgage loans, including savings
and loan associations,  mortgage banks, commercial  banks, investment banks  and
special purpose subsidiaries of the foregoing.

    Stripped  Mortgage-Backed Securities usually are structured with two classes
that receive different proportions of the interest and principal distribution on
a pool of Mortgage Assets. A common type of Stripped Mortgage-Backed  Securities
will  have one class  receiving some of  the interest and  most of the principal
from the  Mortgage  Assets, while  the  other class  will  receive most  of  the
interest and the remainder of the principal. In the most extreme case, one class
will  receive all of the  interest (the interest-only or  "IO" class), while the
other class  will receive  all  of the  principal  (the principal-only  or  "PO"
class). PO classes generate income through the accretion of the deep discount at
which  such  securities are  purchased,  and, while  PO  classes do  not receive
periodic payments of  interest, they  receive monthly  payments associated  with
scheduled  amortization  and  principal  prepayment  from  the  Mortgage  Assets
underlying the PO  class. The  yield to  maturity on  an IO  class is  extremely
sensitive  to  the rate  of principal  payments  (including prepayments)  on the
related underlying Mortgage Assets, and a  rapid rate of principal payments  may
have  a  material  adverse  effect  on the  Fund's  yield  to  maturity.  If the
underlying Mortgage Assets  experience greater than  anticipated prepayments  of
principal,  the Fund may  fail to fully  recoup its initial  investment in these
securities even if the securities are rated Aaa by Moody's or AAA by S&P.

    The Fund may purchase Stripped Mortgage-Backed Securities for income, or for
hedging  purposes  to  protect  the  Fund's  portfolio  against  interest   rate
fluctuations.  For example, since an IO class  will tend to increase in value as
interest rates rise, it may be utilized to hedge against a decrease in value  of
other  fixed-income securities in a rising interest rate environment. The Fund's
management understands that the staff of the Securities and Exchange  Commission
considers  privately  issued  Stripped  Mortgage-Backed  Securities representing
interest only or  principal only  components of  U.S. Government  or other  debt
securities  to be  illiquid securities. The  Fund will treat  such securities as
illiquid so long as the staff maintains such position. Stripped  Mortgage-Backed
Securities  issued by the U.S. Government or  its agencies, and which are backed
by fixed-rate  mortgages,  will  be  treated as  liquid  provided  they  are  so
determined  by, or under procedures approved by, the Board of Trustees. The Fund
may not invest more than 10% of its net assets in illiquid securities.

ASSET-BACKED SECURITIES

    The securitization techniques used to develop Mortgage-Backed Securities are
also applied to a  broad range of  other assets. Through the  use of trusts  and
special  purpose corporations, various types of assets, primarily automobile and
credit card  receivables  and  home  equity  loans,  are  being  securitized  in
pass-through   structures  similar  to   the  mortgage  pass-through  structures
described above or in a pay-through structure similar to the CMO structure.

    New instruments and  variations of existing  Mortgage-Backed Securities  and
Asset-Backed  Securities continue  to be developed.  The Fund may  invest in any
such instruments or  variations as may  be developed, to  the extent  consistent
with   its  investment   objective  and   policies  and   applicable  regulatory
requirements.

                                       10
<PAGE>
    TYPES OF CREDIT  ENHANCEMENT.  Mortgage-Backed  Securities and  Asset-Backed
Securities  are often backed by a pool of assets representing the obligations of
a number of different parties. To lessen  the effect of failures by obligors  on
underlying  assets to  make payments, those  securities may  contain elements of
credit support, which  fall into  two categories: (i)  liquidity protection  and
(ii)  protection against losses resulting from ultimate default by an obligor on
the underlying assets. Liquidity protection refers to the provision of advances,
generally by the  entity administering the  pool of assets,  to ensure that  the
receipt  of  payments  on  the  underlying  pool  occurs  in  a  timely fashion.
Protection against losses resulting from default ensures ultimate payment of the
obligations on at least a portion of the assets in the pool. This protection may
be provided through guarantees, insurance policies or letters of credit obtained
by  the  issuer  or  sponsor  from  third  parties,  through  various  means  of
structuring  the transaction  or through a  combination of  such approaches. The
degree of  credit  support  provided  for  each  issue  is  generally  based  on
historical  information respecting the level of  credit risk associated with the
underlying assets. Delinquencies or losses in excess of those anticipated  could
adversely  affect the return on  an investment in a  security. The Fund will not
pay any fees for  credit support, although the  existence of credit support  may
increase the price of a security.

OTHER INVESTMENT POLICIES

    REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements, which
may  be viewed  as a type  of secured lending  by the Fund,  and which typically
involve the acquisition by the Fund of debt securities, from a selling financial
institution such as a bank, savings  and loan association or broker-dealer.  The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a  fixed time in the future,  usually not more than seven  days from the date of
purchase. While repurchase agreements involve certain risks not associated  with
direct  investments  in  debt  securities, including  the  risks  of  default or
bankruptcy of the  selling financial  institution, the  Fund follows  procedures
designed  to minimize such risks.  These procedures include effecting repurchase
transactions only with  large, well-capitalized  and well-established  financial
institutions and maintaining adequate collateralization.

    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. Generally, the effect of such a transaction is
that  the Fund  can recover all  or most of  the cash invested  in the portfolio
securities involved during the term  of the reverse repurchase agreement,  while
it  will be  able to  keep the interest  income associated  with those portfolio
securities. Such transactions are only advantageous if the interest cost to  the
Fund  of the reverse repurchase  transaction is less than  the cost of obtaining
the cash otherwise.

    The Fund may enter into dollar rolls in which the Fund sells securities  for
delivery  in  the  current  month  and  simultaneously  contracts  to repurchase
substantially similar (same type  and coupon) securities  on a specified  future
date.  During the roll period, the Fund  foregoes principal and interest paid on
the securities. The Fund  is compensated by the  difference between the  current
sales  price and the lower forward price for the future purchase (often referred
to as the "drop") as well as by the interest earned on the cash proceeds of  the
initial sale.

    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. An increase in the
percentage of the  Fund's assets committed  to the purchase  of securities on  a
when-issued, delayed delivery or forward
commit-

                                       11
<PAGE>
ment  basis may increase the volatility of  the Fund's net asset value. The Fund
will establish a  segregated account with  its custodian bank  in which it  will
maintain  cash,  U.S.  Government securities  or  other liquid  high  grade debt
obligations equal  in value  to its  obligations in  respect of  when-issued  or
delayed delivery securities and forward commitments. The Fund's ability to enter
into such transactions is not otherwise limited, but the Fund expects that under
normal  circumstances no  more than 15%  of the  Fund's total assets  will be so
invested.

    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  buy-out  or  debt  restructuring.  If the
anticipated event does  not occur and  the securities are  not issued, the  Fund
will  have lost an investment opportunity. An  increase in the percentage of the
Fund's assets committed  to the purchase  of securities  on a "when,  as and  if
issued"  basis may increase the volatility of  its net asset value. The Fund may
also sell securities  on a  "when, as  and if  issued" basis  provided that  the
issuance of a security will result automatically from the exchange or conversion
of a security owned by the Fund at the time of sale.

    LENDING  OF  PORTFOLIO SECURITIES.    Consistent with  applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers and
other financial institutions, provided that such loans are callable at any  time
by  the Fund (subject to certain notice provisions described in the Statement of
Additional Information), and are at all  times secured by cash, U.S.  Government
securities  or  other high  grade  debt securities,  which  are maintained  in a
segregated account  pursuant to  applicable regulations  and that  are at  least
equal to the market value, determined daily, of the loaned securities.

    PRIVATE  PLACEMENTS.  The Fund may invest 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. These securities are generally referred to  as
private  placements or restricted securities. Limitations  on the resale of such
securities may have an  adverse effect on their  marketability, and may  prevent
the Fund from disposing of them promptly at reasonable prices. The Fund may have
to  bear the expense of  registering such securities for  resale and the risk of
substantial delays in effecting such registration.

    The Securities  and Exchange  Commission  has adopted  Rule 144A  under  the
Securities  Act,  which  permits  the  Fund  to  sell  restricted  securities to
qualified institutional buyers  without limitation. The  Investment Manager  and
Sub-Adviser  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
is  limited by  the Fund's  investment restrictions to  10% of  the Fund's total
assets.

    OPTIONS AND FUTURES TRANSACTIONS.  The Fund is permitted to enter into  call
and  put options  on U.S. Treasury  notes, bonds  and bills which  are listed on
Exchanges and written in  over-the-counter transactions ("OTC options").  Listed
options  are issued by the Options Clearing Corporation ("OCC"). OTC options are
purchased from or sold (written) to dealers or financial institutions which have
entered into direct agreements with the  Fund. The Fund may purchase listed  and
over-the-counter  call  and  put  options  on  U.S.  Government  securities  and
Mortgage-Backed Securities in amounts  equalling up to 5%  of its total  assets.
The  Fund may purchase call and put options on securities which it holds (or has
the right to acquire) in its portfolio only for hedging purposes.

    The Fund  may  also  purchase  and  sell  interest  rate  futures  contracts
("futures  contracts")  that  are traded  on  U.S. commodity  exchanges  on such
underlying securities  as  U.S.  Treasury bonds,  notes  and  bills,  Eurodollar
instruments  and  Mortgage-Backed Securities.  The  Fund will  purchase  or sell
futures contracts only for the purpose of hedging its portfolio (or  anticipated
portfolio)  securities against changes in prevailing interest rates, and not for
speculative purposes.

                                       12
<PAGE>
    The  Fund may also purchase 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.

RISK CONSIDERATIONS

    The  net asset value of the Fund's shares will fluctuate with changes in the
market value of the Fund's portfolio securities. The market value of the  Fund's
portfolio  securities will  increase or decrease  due to a  variety of economic,
market and political factors which cannot be predicted, in particular  movements
in  interest rates  and, with respect  to foreign  currencies, currency exchange
rates. A decline in prevailing interest  rates generally increases the value  of
fixed-income securities, while an increase in rates usually reduces the value of
those  securities. (The Fund's  yield also will  vary based on  the yield of the
Fund's portfolio securities.)

    MORTGAGE-BACKED  AND   ASSET-BACKED   SECURITIES.      Mortgage-Backed   and
Asset-Backed  Securities have certain different characteristics than traditional
debt securities. Among  the major  differences are that  interest and  principal
payments  are made more  frequently, usually monthly, and  that principal may be
prepaid at  any time  because  the underlying  mortgage  loans or  other  assets
generally  may be prepaid at any time. As a result, if the Fund purchases such a
security at  a premium,  a prepayment  rate that  is faster  than expected  will
reduce  yield to maturity, while a prepayment  rate that is slower than expected
will have the opposite effect of increasing yield to maturity. Alternatively, if
the Fund  purchases  these  securities  at  a  discount,  faster  than  expected
prepayments  will increase, while slower  than expected prepayments will reduce,
yield to maturity. The  Fund may invest  a portion of  its assets in  derivative
Mortgage-Backed Securities such as Stripped Mortgage-Backed Securities which are
highly  sensitive to  changes in prepayment  and interest  rates. The Investment
Manager and  the Sub-Advisor  will seek  to manage  these risks  (and  potential
benefits)  by  investing in  a variety  of such  securities and  through hedging
techniques.

    Mortgage-Backed Securities  and  Asset-Backed  Securities,  like  all  fixed
income  securities,  generally decrease  in value  as a  result of  increases in
interest rates.  In  addition,  although generally  the  value  of  fixed-income
securities  increases during  periods of falling  interest rates  and, as stated
above, decreases  during  periods of  rising  interest  rates, as  a  result  of
prepayments  and other  factors, this  is not  always the  case with  respect to
Mortgage-Backed Securities and Asset-Backed Securities.

    Although the extent of  prepayments on a pool  of mortgage loans depends  on
various  economic and other factors, as a general rule prepayments on fixed rate
mortgage loans  will increase  during a  period of  falling interest  rates  and
decrease  during  a  period  of  rising  interest  rates.  Accordingly,  amounts
available for reinvestment by the Fund are likely to be greater during a  period
of  declining interest rates and, as a  result, likely to be reinvested at lower
interest rates  than during  a  period of  rising interest  rates.  Asset-Backed
Securities,  although less  likely to  experience the  same prepayment  rates as
Mortgage-Backed  Securities,  may  respond  to  certain  of  the  same   factors
influencing prepayments, while at other times different factors, such as changes
in  credit use  and payment patterns  resulting from social,  legal and economic
factors,  will   predominate.   Mortgage-Backed  Securities   and   Asset-Backed
Securities  generally decrease  in value  as a  result of  increases in interest
rates and may  benefit less than  other fixed income  securities from  declining
interest rates because of the risk of prepayment.

    The  Fund may  invest in mortgage  derivative securities, such  as CMOs, the
average life of which is  determined using mathematical models that  incorporate
prepayment  assumptions  and  other  factors that  involve  estimates  of future
economic and  market conditions.  These estimates  may vary  from actual  future
results,  particularly during periods of extreme market volatility. In addition,
under

                                       13
<PAGE>
certain market conditions,  such as those  that developed in  1994, the  average
weighted  life of mortgage derivative securities  may not accurately reflect the
price volatility  of such  securities. For  example, in  periods of  supply  and
demand  imbalances in the market for such  securities and/or in periods of sharp
interest rate  movements,  the  prices of  mortgage  derivative  securities  may
fluctuate  to  a  greater  extent  than would  be  expected  from  interest rate
movements alone.

    The Fund's investments  in mortgage derivative  securities also subject  the
Fund  to extension risk. Extension risk  is the possibility that rising interest
rates may  cause prepayments  to occur  at  a slower  than expected  rate.  This
particular  risk may effectively change a security which was considered short or
intermediate-term at the time of  purchase into a long-term security.  Long-term
securities  generally fluctuate more  widely in response  to changes in interest
rates than short or intermediate-term securities.

    There are certain risks  associated specifically with  CMOs. CMOs issued  by
private  entities are not  U.S. Government securities and  are not guaranteed by
any government agency, although the securities  underlying a CMO may be  subject
to  a guarantee. Therefore, if  the collateral securing the  CMO, as well as any
third party credit support or guarantees,  is insufficient to make payment,  the
holder could sustain a loss. However, as stated above, the Fund will invest only
in  CMOs  which are  rated AAA  by S&P  or Aaa  by Moody's  or, if  unrated, are
determined to be  of comparable quality.  Also, a number  of different  factors,
including  the extent of prepayment of  principal of the Mortgage Assets, affect
the availability of cash for principal payments by the CMO issuer on any payment
date and,  accordingly, affect  the timing  of principal  payments on  each  CMO
class.

    Asset-Backed  Securities  involve  certain  risks  that  are  not  posed  by
Mortgage-Backed Securities,  resulting mainly  from the  fact that  Asset-Backed
Securities do not usually contain the complete benefit of a security interest in
the  related  collateral. For  example,  credit card  receivables  generally are
unsecured and the debtors are  entitled to the protection  of a number of  state
and federal consumer credit laws, some of which may reduce the ability to obtain
full  payment. In the case  of automobile receivables, due  to various legal and
economic factors,  proceeds  from  repossessed  collateral  may  not  always  be
sufficient to support payments on these securities.

    STRIPPED  MORTGAGE-BACKED SECURITIES.  The yield  to maturity on an IO class
is extremely sensitive to the rate of principal payments (including prepayments)
on the  related  underlying Mortgage  Assets,  and  a rapid  rate  of  principal
payments  may have a material adverse effect on the Fund's yield to maturity. If
the underlying Mortgage Assets  experience greater than anticipated  prepayments
of  principal, the Fund may fail to fully recoup its initial investment in these
securities even if the securities are rated Aaa by Moody's or AAA by S&P.

    The Fund may purchase Stripped Mortgage-Backed Securities for income, or for
hedging  purposes  to  protect  the  Fund's  portfolio  against  interest   rate
fluctuations.  For example, since an IO class  will tend to increase in value as
interest rates rise, it may be utilized to hedge against a decrease in value  of
other  fixed-income securities in  a rising interest  rate environment. The Fund
understands that the staff of  the Securities and Exchange Commission  considers
privately  issued Stripped Mortgage-Backed Securities representing interest only
or principal only components of U.S.  Government or other debt securities to  be
illiquid  securities. The Fund will treat such securities as illiquid so long as
the staff maintains such position. Stripped Mortgage-Backed Securities issued by
the U.S.  Government  or  its  agencies, and  which  are  backed  by  fixed-rate
mortgages,  will be  treated as  liquid provided they  are so  determined by, or
under procedures approved  by, the Board  of Trustees. The  Fund may not  invest
more  than  10% of  its  total assets  in  illiquid securities  (see "Investment
Restrictions" below).

                                       14
<PAGE>
    REVERSE REPURCHASE AGREEMENTS AND DOLLAR ROLLS.   The Fund will establish  a
segregated  account with its custodian bank in which it will maintain cash, U.S.
Government securities or other liquid high grade debt obligations equal in value
to its obligations in respect of reverse repurchase agreements and dollar rolls.
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  the  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, and are considered borrowings by the Fund. The Fund does not
expect  to engage in reverse repurchase agreements and dollar rolls with respect
to greater than 25% of the Fund's total assets.

    OPTIONS AND FUTURES TRANSACTIONS.  Exchanges may limit  the amount by  which
the  price of a futures contract  may move on any day.  If the price moves equal
the daily limit on successive days, then it may prove impossible to liquidate  a
futures position until the daily limit moves have ceased.

    Participation  in the options  or futures markets  involves investment risks
and transaction costs to which the Fund  would not be subject absent the use  of
these  strategies. If  the Investment  Manager's or  Sub-Advisors' prediction of
movements in the direction of the securities, currency or interest rate  markets
are  inaccurate, the adverse consequences to the  Fund (e.g., a reduction in the
Fund's net asset  value or a  reduction in  the amount of  income available  for
distribution)  may leave the  Fund in a  worse position than  if such strategies
were not  used.  Risks  inherent  in  the  use  of  options,  futures  contracts
and  options  on  futures contracts  include  (a) dependence  on  the Investment
Manager's or  Sub-Advisors'  ability  to  predict  correctly  movements  in  the
direction  of interest rates, as well as securities and/or currency markets; (b)
imperfect correlation between  the price  of options and  futures contracts  and
options  thereon and  movements in  the prices  of the  securities or currencies
being hedged;  (c) the  fact that  skills  needed to  use these  strategies  are
different  from those  needed to select  portfolio securities;  (d) the possible
absence of a liquid secondary market for any particular instrument at any  time;
and (e) the possible need to defer closing out certain hedged positions to avoid
adverse tax consequences.

    Another  such risk is that the price of the futures contract may not move in
tandem with the change in prevailing interest rates against which the Fund seeks
a hedge. A correlation may be distorted  by the fact that the futures market  is
dominated  by short-term traders seeking to profit from the difference between a
contract or security  price objective  and their  cost of  borrowed funds.  Such
distortions  are generally minor  and would diminish  as the contract approached
maturity. See the Statement of Additional Information for further discussion  of
such risks.

    New  futures  contracts, options  and other  financial products  and various
combinations thereof continue to be developed.  The Fund may invest in any  such
futures,  options or products as may be developed, to the extent consistent with
its investment objective and applicable regulatory requirements.

    For additional risk  disclosure, please refer  to the "Investment  Objective
and  Policies" and "Portfolio Characteristics" sections of the Prospectus and to
the "Investment Practices and Policies"  section of the Statement of  Additional
Information.

PORTFOLIO MANAGEMENT

    The  Fund's portfolio is actively managed  by its Investment Manager and the
Sub-Advisor with  a view  to achieving  the Fund's  investment objective.  As  a
result of the Fund's investment objective and

                                       15
<PAGE>
policies,  and  the nature  of the  Mortgage-Backed Securities  and Asset-Backed
Securities markets, the Fund's portfolio turnover  rate may exceed 200%, but  is
not  expected to exceed 300%.  Short-term gains and losses  may result from such
portfolio  transactions.  See  "Dividends,   Distributions  and  Taxes"  for   a
discussion of the tax implications of the Fund's trading policy.

    In  determining which  securities to  purchase for the  Fund or  hold in the
Fund's portfolio,  the  Investment Manager  and  the Sub-Advisor  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  and  Sub-Advisor's  own  analysis  of  factors  they  deem
relevant.  The Fund  is part of  the Dean Witter  family of mutual  funds and is
managed by  its  Investment  Manager,  InterCapital,  and  by  its  Sub-Advisor,
BlackRock Financial Management ("BlackRock"). BlackRock manages in excess of $22
billion  of  net assets  on behalf  of  individual and  institutional investors,
including 21  closed-end funds  and  3 open-end  funds. Along  with  BlackRock's
portfolio  management team,  Scott Amero has  been the  Fund's primary portfolio
manager since its inception. Mr. Amero is a Partner of BlackRock and a member of
its Investment Strategy Committee, and is a specialist in the mortgage and short
duration sectors.  His  areas  of  expertise  include  asset-backed  securities,
adjustable  rate mortgage securities and other short duration mortgage products.
Prior to joining  BlackRock in 1990,  Mr. Amero  was a Vice  President in  Fixed
Income  Research at  The First  Boston Corporation,  where he  became the firm's
primary strategist for short duration securities.

    Brokerage commissions are not  normally charged on the  purchase or sale  of
Mortgage-Backed  Securities or U.S. Government securities, but such transactions
generally involve costs  in the form  of spreads between  bid and asked  prices.
Orders  for transactions in portfolio securities are  placed for the Fund with a
number of brokers and dealers,  which may include DWR.  Pursuant to an order  of
the   Securities  and  Exchange  Commission,   the  Fund  may  effect  principal
transactions in certain money market instruments with DWR. In addition, the Fund
may incur brokerage commissions on transactions conducted through DWR.

INVESTMENT RESTRICTIONS
--------------------------------------------------------------------------------

    The investment restrictions  listed below  are among  the restrictions  that
have  been  adopted  by the  Fund  as  fundamental policies.  Under  the  Act, a
fundamental policy may  not be changed  without the  vote of a  majority of  the
outstanding voting securities of the Fund, as defined in the Act.

    The Fund may not:

    1. With respect 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. Purchase more than 10% of all outstanding
voting securities of any one issuer.

    3. Invest 25% or more of the value of its total
assets  in securities of issuers in any  one industry, except that the Fund will
invest at least 25% of its assets in Mortgage-Backed and Asset-Backed Securities
under normal market conditions. This  restriction does not apply to  obligations
issued  or  guaranteed  by  the  United States  Government  or  its  agencies or
instrumentalities.

    4. Invest more than 10% of its total assets in
"illiquid securities" and repurchase agreements which have a maturity of  longer
than  seven days. The staff of the  Securities and Exchange Commission has taken
the position that OTC  options are illiquid  securities. The Investment  Manager
and Sub-Advisor disagree with this position.
Neverthe-

                                       16
<PAGE>
less,  the  Fund has  agreed to  treat  OTC options  as illiquid  securities for
purposes of this  investment restriction  so long  as the  staff maintains  such
position.

    5. 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 Mortgage-Backed Securities or Asset-Backed Securities or to any obligation of
the United States Government, its agencies or instrumentalities.

    6. Purchase or sell commodities or
commodities  contracts except that the Fund  may purchase and sell interest rate
futures contracts and related options thereon.

    7. Pledge its assets or assign or otherwise
encumber them except to  secure permitted borrowings. (For  the purpose of  this
restriction, collateral arrangements with respect to initial or variation margin
for futures are not deemed to be pledges of assets.)

    8. Purchase securities on margin (but the
Fund  may  obtain  short-term  loans  as  are  necessary  for  the  clearance of
transactions). The deposit or payment by the Fund of initial or variation margin
in  connection  with  futures  contracts  or  related  options  thereon  is  not
considered the purchase of a security on margin.

    9. Borrow money in excess of 33 1/3% of the
Fund's total assets (including the proceeds of the borrowings).

    If  a percentage restriction is adhered to at the time of investment (except
in the  case of  Restriction 9),  a  later increase  or decrease  in  percentage
resulting  from a change in values of portfolio securities or amount of total or
net assets  will  not  be  considered  a  violation  of  any  of  the  foregoing
restrictions.

PURCHASE OF FUND SHARES
--------------------------------------------------------------------------------

    The  Fund offers its  shares for sale  to the public  on a continuous basis.
Shares of  the  Fund are  distributed  by  Dean Witter  Distributors  Inc.  (the
"Distributor"),   an  affiliate  of  the   Investment  Manager,  pursuant  to  a
Distribution Agreement between the Fund and  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.

    The minimum initial purchase is $1,000. Subsequent purchases of $100 or more
may  be made by  sending a check,  payable to Dean  Witter Premier Income Trust,
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.  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"  below),
plus  a sales  charge (expressed  as a  percentage of  the offering  price) on a
single transaction as shown in the following table:

<TABLE>
<CAPTION>
                                      SALES CHARGE
                        ----------------------------------------
                           PERCENTAGE           APPROXIMATE
      AMOUNT OF             OF PUBLIC          PERCENTAGE OF
  SINGLE TRANSACTION     OFFERING PRICE       AMOUNT INVESTED
----------------------  -----------------  ---------------------
<S>                     <C>                <C>
Less than $100,000....          3.00%                 3.09%
$100,000 but less than
 $250,000.............          2.50                  2.56
</TABLE>

                                       17
<PAGE>
<TABLE>
<CAPTION>
                                      SALES CHARGE
                        ----------------------------------------
                           PERCENTAGE           APPROXIMATE
      AMOUNT OF             OF PUBLIC          PERCENTAGE OF
  SINGLE TRANSACTION     OFFERING PRICE       AMOUNT INVESTED
----------------------  -----------------  ---------------------
<S>                     <C>                <C>
$250,000 but less than
 $500,000.............          2.00                  2.04
$500,000 but less than
 $1,000,000...........          1.25                  1.27
$1,000,000 and over...         -0-                  -0-
</TABLE>

    The above schedule of sales charges  is applicable to purchases in a  single
transaction  by, among others: (a) an individual;  (b) an individual, his or her
spouse and their children under the age  of 21 purchasing shares for his or  her
own  accounts; (c) a trustee  or other fiduciary purchasing  shares for a single
trust estate or  a single fiduciary  account; (d) a  pension, profit-sharing  or
other  employee benefit plan qualified or non-qualified under Section 401 of the
Internal Revenue  Code;  (e)  tax-exempt  organizations  enumerated  in  Section
501(c)(3)  or  (13) of  the Internal  Revenue Code;  (f) employee  benefit plans
qualified under Section 401 of the Internal Revenue Code of a single employer or
of employers who are  "affiliated persons" of each  other within the meaning  of
Section  2(a)(3)(c)  of the  Act and  for  investments in  Individual Retirement
Accounts of employees of a single employer through Systematic Payroll  Deduction
Plans, or (g) any other organized group of persons, whether incorporated or not,
provided  the organization has been in existence for at least six months and has
some purpose other than  the purchase of redeemable  securities of a  registered
investment company at a discount.

    Shares  of  the Fund  are  sold through  the  Distributor on  a  normal five
business day settlement basis; that is, payment is due on the fifth business day
(settlement date) after the order is placed with the Distributor. Shares of  the
Fund  purchased through the  Distributor are entitled  to any dividends declared
beginning on the  next business  day following  settlement date.  Since DWR  and
other  Selected Broker-Dealers forward investors' funds on settlement date, they
will benefit  from the  temporary use  of the  funds if  payment is  made  prior
thereto.  Shares  purchased  through  the Transfer  Agent  are  entitled  to 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. Investors  will be  entitled to  receive capital  gains
distributions  if their order  is received by  the close of  business on the day
prior to the record date for such distributions. Sales personnel are compensated
for selling shares  of the Fund  at the time  of their sale  by the  Distributor
and/or Selected Broker-Dealer. In addition, some sales personnel of the Selected
Broker-Dealer  will receive  various types  of non-cash  compensation as special
sales incentives,  including trips,  educational  and/or business  seminars  and
merchandise.  The Fund  and/or the Distributor  reserve the right  to reject any
purchase order.

REDUCED SALES CHARGE

    RIGHT OF ACCUMULATION.  Investors may benefit from a reduction of the  sales
charges  in accordance with the above schedule if the cumulative net asset value
of shares of the  Fund purchased in a  single transaction, together with  shares
previously  purchased which are held at the time of such transaction, amounts to
$100,000 or more.

    The Distributor must be notified by  the shareholder at the time a  purchase
order  is placed that  the purchase qualifies  for the reduced  charge under the
Right of  Accumulation. Similar  notification must  be made  in writing  by  the
shareholder  when such an order is placed by mail. The reduced sales charge will
not be granted if:  (a) such notification  is not furnished at  the time of  the
order;  or (b) a review of the records  of the Distributor or the Transfer Agent
fails to confirm the investor's represented holdings.

    LETTER OF INTENT.  The foregoing schedule of reduced sales charges will also
be available to investors  who enter into a  written Letter of Intent  providing
for the purchase, within a thirteen-month period, of shares of the Fund from the
Distributor. The cost of shares of the Fund which were previously purchased at a
price  including a front-end sales charge during  the 90-day period prior to the
date of receipt by the Distributor of the Letter of

                                       18
<PAGE>
Intent, which  are still  owned by  the  shareholder, may  also be  included  in
determining the applicable reduction.

    For  further information concerning purchases  of the Fund's shares, contact
the Distributor or consult the Statement of Additional Information.

PLAN OF DISTRIBUTION

    The Fund has  entered into  a Plan of  Distribution pursuant  to Rule  12b-1
under  the Act, whereby the  expenses of certain activities  and services 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. Reimbursements for these expenses will be made in monthly
payments by the Fund to the Distributor, which will in no event exceed an amount
equal  to a payment at  the annual rate of  0.20 of 1% of  the average daily net
assets of the Fund. Expenses incurred by the Distributor pursuant to the Plan in
any fiscal year will not be reimbursed  by the Fund through payments accrued  in
any  subsequent  fiscal year.  No interest  or other  financial charges  will be
incurred on any distribution expense incurred by the Distributor under the  Plan
or on any unreimbursed expenses due to the Distributor pursuant to the Plan. The
fee payable pursuant to the Plan, equal to 0.20% of the Fund's average daily net
assets, is characterized as a service fee within the meaning of NASD guidelines.
The  Fund  accrued  $112,520  to  the  Distributor,  pursuant  to  the  Plan  of
Distribution, for the year  ended October 31,  1994. This is  an accrual at  the
annual rate of 0.18% of the Fund's average daily net assets.

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 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 is  valued
at  its last  sale price  on that  exchange prior  to the  time when  assets are
valued; if there were no sales that  day, the security is valued at the  closing
bid  price, and (2)  all portfolio securities  for which over-the-counter market
quotations are readily available are valued at the latest bid price prior to the
time of valuation. When market  quotations are not readily available,  including
circumstances  under which it is determined by the Investment Manager and/or the
Sub-Advisor that sale or  bid prices are not  reflective of a security's  market
value, portfolio securities are valued at their fair value as determined in good
faith  under procedures established by and  under the general supervision of the
Fund's Trustees (valuation  of securities  for which market  quotations are  not
readily  available may  also be based  upon current market  prices of securities
which are comparable  in coupon, rating  and maturity or  an appropriate  matrix
utilizing similar factors).

    Certain  of  the  Fund's  portfolio  securities  for  which  reliable market
quotations are generally not readily available are valued by an outside  pricing
service  approved  by  the  Fund's  Trustees.  The  pricing  service  utilizes a
computerized grid  matrix and/  or  research and  evaluations  by its  staff  in
determining  what  it believes  is the  fair value  of the  portfolio securities
valued by such pricing service.

    Short-term debt securities with remaining  maturities of sixty days or  less
at the time of
pur-

                                       19
<PAGE>
chase  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 Trust
ees.

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. Each purchase of shares of the Fund is  made
upon the condition that the Transfer Agent is thereby automatically appointed as
agent  of the investor to receive  all dividends and capital gains distributions
on shares owned by the investor.  Such dividends and distributions will be  paid
in  shares of the  Fund (or in cash  if the shareholder so  requests) at the net
asset value per share (without sales charge) on the monthly payment date,  which
will  be no later than the last business day of the month for which the dividend
or distribution is  payable. Processing  of dividend  checks begins  immediately
following  the monthly payment date. Shareholders  who have requested to receive
dividends in cash will normally receive their monthly dividend checks during the
first ten days of the following month.

    EASYINVESTSM.   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.

    SYSTEMATIC WITHDRAWAL PLAN.  A 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 offering price. The plan provides for monthly or quarterly
(March, June, September, December)  checks in any dollar  amount, not less  than
$25 or in any whole percentage of the account balances, on an annualized basis.

    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 front-end (at time of purchase) sales charge
("FESC funds"), for shares of Dean Witter Funds sold with a contingent  deferred
sales  charge  ("CDSC funds"),  and for  shares of  Dean Witter  Short-Term U.S.
Treasury Trust, Dean Witter Limited Term Municipal Trust, Dean Witter Short-Term
Bond Fund and five Dean Witter Funds which are money market funds (the foregoing
eight non-FESC and non-CDSC funds are  hereinafter referred to as the  "Exchange
Funds"). Exchanges may be made after the shares of the Fund acquired by purchase
(not by exchange or dividend reinvestment) have been held for thirty days. There
is  no waiting period for  exchanges of shares acquired  by exchange or dividend
reinvestment. However,  shares  of  CDSC funds,  including  shares  acquired  in
exchange  for shares  of FESC  funds, may  not be  exchanged for  shares of FESC
funds. Thus, shareholders  who exchange  their Fund  shares for  shares of  CDSC
funds  may subsequently exchange those shares for  shares of other CDSC funds or
Exchange Funds but may not reacquire FESC fund shares by exchange.

    An exchange to another FESC fund, to a CDSC fund or to an 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

                                       20
<PAGE>
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
Exchange  Funds, FESC  funds and CDSC  funds can  be effected on  the same basis
(except that CDSC fund shares  may not be exchanged  for shares of FESC  funds).
Shares  of a CDSC  fund acquired in exchange  for shares of an  FESC fund (or in
exchange for shares of other Dean Witter Funds for which shares of an FESC  fund
have  been exchanged)  are not subject  to any contingent  deferred sales charge
upon their redemption.

    Purchases and  exchanges should  be  made for  investment purposes  only.  A
pattern  of frequent  exchanges may  be deemed by  the Investment  Manager to be
abusive and contrary to the best interests of the Fund's other shareholders and,
at the Investment Manager's discretion, may be limited by the Fund's refusal  to
accept  additional purchases and/  or exchanges from  the investor. Although the
Fund does not  have any  specific definition of  what constitutes  a pattern  of
frequent  exchanges,  and  will  consider all  relevant  factors  in determining
whether a particular situation is abusive and contrary to the best interests  of
the Fund and its other shareholders, investors should be aware that the Fund and
each  of the other Dean Witter Funds  may in their discretion limit or otherwise
restrict the number  of times this  Exchange Privilege may  be exercised by  any
investor.  Any such restriction will be made  by the Fund on a prospective basis
only, upon notice  to the  shareholder not later  than ten  days following  such
shareholder's  most  recent  exchange.  Also,  the  Exchange  Privilege  may  be
terminated or revised at  any time by  the Fund and/or any  of such Dean  Witter
Funds  for which shares of the Fund may be exchanged, upon such notice as may be
required by  applicable  regulatory agencies.  Shareholders  maintaining  margin
accounts  with  DWR  or another  Selected  Broker-Dealer are  referred  to their
account executive  regarding restrictions  on  exchange of  shares of  the  Fund
pledged in their 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 another  Selected  Broker-Dealer but  who wish  to make
exchanges directly by writing or  telephoning the Transfer Agent) must  complete
and  forward to  the Transfer  Agent an  Exchange Privilege  Authorization form,
copies of which may be obtained from the Transfer Agent to initiate an exchange.
If the  Authorization Form  is used,  exchanges may  be made  in writing  or  by
contacting  the  Transfer Agent  at (800)  526-3143 (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
proce-

                                       21
<PAGE>
dures  are  not  employed,  the  Fund  may  be  liable  for  any  losses  due to
unauthorized or fraudulent instructions.

    Telephone exchange instructions will be accepted if received by the Transfer
Agent between 9:00 a.m.  and 4:00 p.m. New  York time, on any  day the New  York
Stock  Exchange is  open. Any  shareholder wishing to  make an  exchange who has
previously filed an Exchange Privilege Authorization  Form and who is unable  to
reach  the Fund  by telephone should  contact his  or her DWR  or other Selected
Broker-Dealer account  executive, if  appropriate, or  make a  written  exchange
request.  Shareholders are  advised that during  periods of  drastic economic or
market changes, it  is possible that  the telephone exchange  procedures may  be
difficult to implement, although this has not been the case with the Dean Witter
Funds in the past.

    For additional information about the Exchange Privilege, shareholders should
contact  their  DWR or  other Selected  Broker-Dealer  account executive  or the
Transfer Agent.

REDEMPTIONS AND REPURCHASES
--------------------------------------------------------------------------------

    REDEMPTION.  Shares  of the Fund  can be redeemed  for cash at  any time  at
their  current  net  asset value  per  share  (without any  redemption  or other
charge). If  shares  are  held  in  a  shareholder's  account  without  a  share
certificate,  a written request for redemption sent 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
certificate(s) with a written request for redemption, along with any  additional
information required by the Transfer Agent.

    REPURCHASE.    DWR  and  other  Selected  Broker-Dealers  are  authorized to
repurchase shares represented by a share  certificate which is delivered to  any
of  their  offices.  Shares held  in  a  shareholder's account  without  a share
certificate may 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 determined (see "Purchase of Fund Share -- Determination of Net Asset
Value")  after such repurchase order is  received. Repurchase orders received by
DWR and other Selected Broker-Dealers prior to 4:00 p.m., New York time, on  any
business  day will be priced at  the net asset value per  share that is based on
that day's close.  Repurchase orders received  after 4:00 p.m.,  New York  time,
will  be  priced  on  the  basis of  the  next  business  day's  close. Selected
Broker-Dealers may charge for their services in connection with the  repurchase,
but  the Fund, DWR and  the Distributor do not charge  a fee. Payment for shares
repurchased may be made by the Fund to DWR and other Selected Broker-Dealers for
the  account  of  the  shareholder.  The   offer  by  DWR  and  other   Selected
Broker-Dealers  to  repurchase  shares  from  dealers  or  shareholders  may  be
suspended by them  at any  time. In that  event, shareholders  may redeem  their
shares through the Fund's Transfer Agent as set forth above under "Redemption."

    PAYMENT  FOR SHARES REDEEMED  OR REPURCHASED.   Payment for shares presented
for repurchase  or redemption  will be  made by  check within  seven days  after
receipt  by the Transfer Agent of the certificate and/or written request in good
order. Such payment  may be postponed  or the right  of redemption suspended  at
times 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.

                                       22
<PAGE>
    REINSTATEMENT  PRIVILEGE.   A  shareholder  who has  had  his or  her shares
redeemed or  repurchased and  has not  previously exercised  this  reinstatement
privilege  may, within 30 days  after the date of  the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase in
shares of  the Fund  at their  net asset  value (without  a sales  charge)  next
determined  after  a  reinstatement  request,  together  with  the  proceeds, is
received by the Transfer Agent.

    INVOLUNTARY REDEMPTION.  The Fund reserves the right, on sixty days' notice,
to redeem at their net  asset value, the shares  of any shareholder (other  than
shares  held  in an  Individual Retirement  Account  or custodial  account under
Section 403(b)(7) of  the Internal Revenue  Code) whose shares  have a value  of
less  than $100 as a result of redemptions or repurchases, or such lesser amount
as may be fixed by the Board of Trustees. 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 $100 and allow the shareholder sixty
days to make an additional investment in an amount which will increase the value
of the account to $100 or more before the redemption is processed.

DIVIDENDS, DISTRIBUTIONS AND TAXES
--------------------------------------------------------------------------------

    DIVIDENDS  AND  DISTRIBUTIONS.    The  Fund  declares  dividends  from   net
investment  income on each day the New  York Stock Exchange is open for business
to shareholders of  record as of  the close of  business the preceding  business
day.  Such dividends are paid monthly. The Fund intends to distribute all of the
Fund's net investment income on an annual basis.

    Net realized  short-term  and  long-term  capital gains,  if  any,  will  be
distributed at least once per year, although the Investment Manager reserves the
right to retain a portion of long-term gains for reinvestment.

    All  dividends and  capital gains distributions  will be  paid in additional
Fund  shares  (without   sales  charge)  and   automatically  credited  to   the
shareholder's  account  without  issuance  of  a  share  certificate  unless the
shareholder requests  in  writing that  all  dividends  be paid  in  cash.  (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 such income and capital gains.

    Gains  or losses on the Fund's transactions in listed options on securities,
futures and options on futures may be treated as 60% long-term gain or loss  and
40%  short-term  gain or  loss. When  the  Fund engages  in options  and futures
transactions, various tax regulations applicable to the Fund may have the effect
of causing the Fund  to recognize a  gain or loss for  tax purposes before  that
gain  or loss is  realized, or to defer  recognition of a  realized loss for tax
purposes. Recognition, for tax purposes, of  an unrealized loss may result in  a
lesser  amount of the  Fund's realized net short-term  gains being available for
distribution.

    Shareholders who are  required to pay  taxes on their  income will  normally
have  to pay federal income taxes, and  any applicable state and/or local income
taxes, on  the dividends  and distributions  they receive  from the  Fund.  Such
dividends  and  distributions, to  the  extent that  they  are derived  from net
investment  income  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.  Any  dividends
declared  in  the  last quarter  of  any calendar  year  which are  paid  in the

                                       23
<PAGE>
following year prior to February 1 will be deemed received by the shareholder in
the prior year.
    After the  end  of  the  calendar  year,  shareholders  will  be  sent  full
information  on  their dividends  and any  capital  gains distributions  for tax
purposes, including information as  to the portion  taxable as ordinary  income,
the  portion taxable as capital  gains and any portion  treated as a non-taxable
return of capital. Any such return of capital will reduce the shareholders'  tax
basis  in  their  shares.  To  avoid  being  subject  to  a  31%  federal backup
withholding  tax  on  taxable  dividends,  distributions  and  the  proceeds  of
redemptions  and repurchases, shareholders' taxpayer identification numbers must
be furnished and certified as to their accuracy.

    Distributions of  net  long-term  capital  gains, if  any,  are  taxable  to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional  shares or in cash. Capital  gains distributions are not eligible for
the corporate dividends received deduction.
    The  foregoing  discussion  relates  solely   to  the  federal  income   tax
consequences  of an investment in the Fund. Distributions may also be subject to
state and local taxes; therefore, each shareholder is advised to consult his  or
her  own tax advisor. Shareholders  will be notified annually  by the Fund as to
the Federal tax status  of dividends and distributions  paid or retained by  the
Fund.

PERFORMANCE INFORMATION
--------------------------------------------------------------------------------

    From  time to time the Fund may  quote its "yield" and/or its "total return"
in advertisements and sales literature. Both  the yield and the total return  of
the  Fund are  based on  historical earnings  and are  not intended  to indicate
future performance. The yield of the Fund is computed by dividing the Fund's net
investment income over a  30-day period by an  average value (using the  average
number  of shares entitled  to receive dividends and  the maximum offering price
per share  at  the  end  of  the period),  all  in  accordance  with  applicable
regulatory  requirements.  Such amount  is compounded  for  six months  and then
annualized for a twelve-month period to derive the Fund's yield.

    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 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 period. It also
assumes reinvestment of all dividends and distributions paid by the Fund.

    In  addition to the foregoing, the Fund  may advertise its total return over
different periods of time by means of aggregate, average, year-by-year or  other
types  of total  return figures.  Such calculations may  or may  not reflect the
deduction of the front-end  sales charge which, if  reflected, would reduce  the
performance  quoted.  The Fund  may also  advertise  the growth  of hypothetical
investments of $10,000, $50,000 and $100,000 in  shares of the Fund by adding  1
to  the Fund's aggregate total return to date and multiplying by $9,700, $48,500
and $97,500 ($10,000, $50,000  and $100,000 adjusted for  3%, 3% and 2.5%  sales
charges,  respectively.  The  Fund from  time  to  time may  also  advertise its
performance relative to  certain performance  rankings and  indexes compiled  by
independent organizations (such as Lipper Analytical Services, Inc.).

                                       24
<PAGE>
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  and requires that
notice of such disclaimer be given  in each instrument entered into or  executed
by  the Fund, 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,  the possibility  of the Fund  being unable  to meet its
obligations is remote and, in the opinion of Massachusetts counsel to the  Fund,
the risk to Fund shareholders of personal liability is remote.

    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.

                                       25
<PAGE>
                        THE DEAN WITTER FAMILY OF FUNDS

MONEY MARKET FUNDS                       DEAN WITTER RETIREMENT SERIES
Dean Witter Liquid Asset Fund Inc.       Liquid Asset Series
Dean Witter U.S. Government Money        U.S. Government Money Market Series
Market Trust                             U.S. Government Securities Series
Dean Witter Tax-Free Daily Income Trust  Intermediate Income Securities Series
Dean Witter California Tax-Free Daily    American Value Series
Income Trust                             Capital Growth Series
Dean Witter New York Municipal Money     Dividend Growth Series
Market Trust                             Strategist Series
EQUITY FUNDS                             Utilities Series
Dean Witter American Value Fund          Value-Added Market Series
Dean Witter Natural Resource             Global Equity Series
Development Securities Inc.              ASSET ALLOCATION FUNDS
Dean Witter Dividend Growth Securities   Dean Witter Managed Assets Trust
Inc.                                     Dean Witter Strategist Fund
Dean Witter Developing Growth            ACTIVE ASSETS ACCOUNT PROGRAM
Securities Trust                         Active Assets Money Trust
Dean Witter World Wide Investment Trust  Active Assets Tax-Free Trust
Dean Witter Value-Added Market Series    Active Assets California Tax-Free Trust
Dean Witter Utilities Fund               Active Assets Government Securities
Dean Witter Capital Growth Securities    Trust
Dean Witter European Growth Fund Inc.
Dean Witter Precious Metals and
Minerals Trust
Dean Witter Pacific Growth Fund Inc.
Dean Witter Health Services Trust
Dean Witter Global Dividend Growth
Securities
Dean Witter Global Utilities Fund
Dean Witter International SmallCap Fund
Dean Witter Mid-Cap Growth Fund
FIXED-INCOME FUNDS
Dean Witter High Yield Securities Inc.
Dean Witter Tax-Exempt Securities Trust
Dean Witter U.S. Government Securities
Trust
Dean Witter California Tax-Free Income
Fund
Dean Witter New York Tax-Free Income
Fund
Dean Witter Convertible Securities
Trust
Dean Witter Federal Securities Trust
Dean Witter World Wide Income Trust
Dean Witter Intermediate Income
Securities
Dean Witter Global Short-Term Income
Fund Inc.
Dean Witter Multi-State Municipal
Series Trust
Dean Witter Premier Income Trust
Dean Witter Short-Term U.S. Treasury
Trust
Dean Witter Diversified Income Trust
Dean Witter Limited Term Municipal
Trust
Dean Witter Short-Term Bond Fund
Dean Witter National Municipal Trust
Dean Witter High Income Securities

<PAGE>

Dean Witter
Premier Income Trust
                                    Dean Witter
Two World Trade Center
New York, New York 10048
TRUSTEES                            Premier Income
Jack F. Bennett                     Trust
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Dr. Manuel H. Johnson
Paul Kolton
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
OFFICERS
Charles A. Fiumefreddo
Chairman and Chief Executive
Officer
Sheldon Curtis
Vice President, Secretary and
General Counsel
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.
SUB-ADVISOR
BlackRock Financial Management L.P.
                                         PROSPECTUS -- JANUARY 11, 1995


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