MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST
485APOS, 1999-07-29
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<PAGE>


     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 29, 1999
                                                    REGISTRATION NOS.: 33-48189
                                                                       811-6683
================================================================================
                      SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                               ----------------

                                   FORM N-1A
                            REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933                     [X]
                         PRE-EFFECTIVE AMENDMENT NO.                         [ ]
                         POST-EFFECTIVE AMENDMENT NO. 9                      [X]
                                     AND/OR
               REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940                                [X]
                                AMENDMENT NO. 10                             [X]

                               ----------------

               MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST
                       (A MASSACHUSETTS BUSINESS TRUST)
              (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)

      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600
                               BARRY FINK, ESQ.
                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)

                                   Copy to:
                            DAVID M. BUTOWSKY, ESQ.
                              MAYER, BROWN & PLATT
                                 1675 BROADWAY
                         NEW YORK, NEW YORK 10019-5820

                               ----------------

                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:


 As soon as practicable after this Post-Effective Amendment becomes effective.

 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)


                        immediately upon filing pursuant to paragraph (b)
                  -----
                        on (date) pursuant to paragraph (b)
                  -----
                        60 days after filing pursuant to paragraph (a)
                  -----
                    X   on September 27, 1999 pursuant to paragraph (a) of
                  ----- rule 485.

                               ----------------

                            AMENDING THE PROSPECTUS
================================================================================
<PAGE>

                                             PROSPECTUS - SEPTEMBER 27, 1999

Morgan Stanley Dean Witter

           ---------------------------------------------------------------------

                                                          HEALTH SCIENCES TRUST



















                                  A MUTUAL FUND THAT SEEKS CAPITAL APPRECIATION



The Securities and Exchange Commission has not approved or disapproved these
 securities or passed upon the adequacy of this Prospectus. Any representation
                     to the contrary is a criminal offense.

<PAGE>

CONTENTS

The Fund                  Investment Objective.................................1

                          Principal Investment Strategies......................1

                          Principal Risks......................................2

                          Past Performance.....................................3

                          Fees and Expenses....................................4

                          Additional Investment Strategy Information...........5

                          Additional Risk Information..........................6

                          Fund Management......................................7

Shareholder Information   Pricing Fund Shares..................................8

                          How to Buy Shares....................................8

                          How to Exchange Shares...............................9

                          How to Sell Shares..................................11

                          Distributions.......................................13

                          Tax Consequences....................................13

                          Share Class Arrangements............................14

Financial Highlights       ...................................................21

Our Family of Funds        ................................... Inside Back Cover



                  This Prospectus contains important information about the Fund.
                  Please read it carefully and keep it for future reference.

<PAGE>

THE FUND


[GRAPHIC OMITTED]
             INVESTMENT OBJECTIVE
- ---------------------------------
Morgan Stanley Dean Witter Health Sciences Trust seeks capital appreciation.

[GRAPHIC OMITTED]
             PRINCIPAL INVESTMENT STRATEGIES
- --------------------------------------------
(side bar)
CAPITAL APPRECIATION

An investment objective having the goal of selecting securities with the
potential to rise in price rather than pay out income.
(end side bar)

The Fund will normally invest at least 65% of its total assets in common stocks
of health science companies throughout the world. A company will be considered
to be a health science company if it derives at least 50% of its earnings or
revenues, or it devotes at least 50% of its assets, to health science
activities. Health science companies include, among others:

o hospitals, clinical test laboratories, convalescent and mental health care
  facilities and home care businesses;

o pharmaceutical companies and companies involved in biotechnology, medical
  diagnostics, biochemicals, and nuclear research and development;

o companies that produce and manufacture medical, dental and optical supplies
  and equipment;

o companies that provide services to health care companies; and

o HMOs and other health insurance companies.

In deciding which securities to buy, hold or sell, the Fund's "Investment
Manager," Morgan Stanley Dean Witter Advisors Inc., invests in companies based
on its view of business, economic and political conditions.

Common stock is a share ownership or equity interest in a corporation. It may
or may not pay dividends, as some companies reinvest all of their profits back
into their businesses, while others pay out some of their profits to
shareholders as dividends.

In addition, the Fund may invest in the common stock of non-health science
companies, preferred stock and investment grade fixed-income securities.

In pursuing the Fund's investment objective, the Investment Manager has
considerable leeway in deciding which investments it buys, holds or sells on a
day-to-day basis -- and which trading strategies it uses. For example, the
Investment Manager in its discretion may determine to use some permitted
trading strategies while not using others.


                                                                               1
<PAGE>


[GRAPHIC OMITTED]
             PRINCIPAL RISKS
- ----------------------------
There is no assurance that the Fund will achieve its investment objective. The
Fund's share price will fluctuate with changes in the market value of the
Fund's portfolio securities. When you sell Fund shares, they may be worth less
than what you paid for them and, accordingly, you can lose money investing in
this Fund.

COMMON STOCKS. In general, stock values fluctuate in response to activities
specific to the company as well as general market, economic and political
conditions. These prices can fluctuate widely.

HEALTH SCIENCES INDUSTRY. The Fund concentrates its investments in the health
sciences industry. Because of this concentration, the value of the Fund's
shares may be more volatile than mutual funds that do not similarly concentrate
their investments. The health sciences industry is subject to substantial
regulation and could be materially adversely effected by changes in
governmental regulations. Additionally, the products and services of companies
in this industry may be subject to faster obsolescence as a result of greater
competition and advancing technological developments. As a result, the
securities of companies in this industry may exhibit greater price volatility
than those of companies in other industries.

The Fund may invest in smaller health science companies which involve greater
risks, than large or more established issuers. These smaller companies may have
limited product lines, markets or financial resources, and their securities may
trade less frequently and in more limited volume than the securities of larger,
more established companies. As a result, the prices of the securities of
smaller companies may fluctuate to a greater degree than the prices of the
securities of other issuers.

FOREIGN SECURITIES. The Fund's investments in foreign securities (including
depository receipts) involve risks that are in addition to the risks associated
with domestic securities. One additional risk is currency risk. While the price
of Fund shares is quoted in U.S. dollars, the Fund generally converts U.S.
dollars to a foreign market's local currency to purchase a security in that
market. If the value of that local currency falls relative to the U.S. dollar,
the U.S. dollar value of the foreign security will decrease. This is true even
if the foreign security's local price remains unchanged.

Foreign securities also have risks related to economic and political
developments abroad, including expropriations, confiscatory taxation, exchange
control regulation, limitations on the use or transfer of Fund assets and any
effects of foreign social, economic or political instability. Foreign
companies, in general, are not subject to the regulatory requirements of U.S.
companies and, as such, there may be less publicly available information about
these companies. Moreover, foreign accounting, auditing and financial reporting
standards generally are different from those applicable to U.S. companies.
Finally, in the event of a default of any foreign debt obligations, it may be
more difficult for the Fund to obtain or enforce a judgment against the issuers
of the securities.

Securities of foreign issuers may be less liquid than comparable securities of
U.S. issuers and, as such, their price changes may be more volatile.
Furthermore, foreign exchanges and broker-dealers are generally subject to less
government and exchange scrutiny and regulation than their U.S. counterparts.
In addition, differences in


2
<PAGE>

clearance and settlement procedures in foreign markets may occasion delays in
settlements of the Fund's trades effected in those markets. Delays in
purchasing securities may result in the Fund losing investment opportunities.
The inability to dispose of foreign securities due to settlement delays could
result in losses to the Fund due to subsequent declines in value of the
securities.

Many European countries have adopted or are in the process of adopting a single
European currency, referred to as the "euro." The long-term consequences of the
euro conversion for foreign exchange rates, interest rates and the value of
European securities the Fund may purchase are unclear. The consequences may
adversely affect the value and/or increase the volatility of securities held by
the Fund.

OTHER RISKS. The performance of the Fund also will depend on whether the
Investment Manager is successful in pursuing the Fund's investment strategy.
The Fund is also subject to other risks from its permissible investments
including the risks associated with its fixed-income investments.

Shares of the Fund are not bank deposits and are not guaranteed or insured by
the FDIC or any other government agency.

[GRAPHIC OMITTED]
             PAST PERFORMANCE
- -----------------------------
The bar chart and table below provide some indication of the risks of investing
in the Fund. The Fund's past performance does not indicate how the Fund will
perform in the future.

ANNUAL TOTAL RETURNS -- CALENDAR YEARS

1993        0
 '94        0
 '95        0
 '96        0
 '97        0
 '98        0

(side bar)
ANNUAL TOTAL RETURNS
This chart shows how the performance of the Fund's Class B shares has varied
from year to year over the past 6 calendar years.
(end side bar)


The bar chart reflects the performance of Class B shares; the performance of
the other Classes will differ because the Classes have different ongoing fees.
The performance information in the bar chart does not reflect the deduction of
sales charges; if these amounts were reflected, returns would be less than
shown. Year-to-date total return as of
June 30, 1999 was   %.

During the periods shown in the bar chart, the highest return for a calendar
quarter was      % (quarter ended        ,    ) and the lowest return for a
calendar quarter was    % (quarter ended      ,    ).


                                                                               3
<PAGE>

(side bar)
AVERAGE ANNUAL TOTAL RETURNS

This table compares the Fund's average annual returns with those of a broad
measure of market performance over time as well as with an index of funds with
similar investment objectives. The Fund's returns include the maximum applicable
sales charge for each Class and assume you sold your shares at the end of each
period.
(end side bar)


<TABLE>
<CAPTION>

 AVERAGE ANNUAL TOTAL RETURNS (AS OF DECEMBER 31, 1998)
- ------------------------------------------------------------------------------------------
                                                                         LIFE OF THE FUND
                                        PAST 1 YEAR     PAST 5 YEARS     (SINCE 10/30/92)
- ------------------------------------------------------------------------------------------
<S>                                    <C>             <C>              <C>
 Class A(1)                                    %               %               --
- ------------------------------------------------------------------------------------------
 Class B                                       %               %                  %
- ------------------------------------------------------------------------------------------
 Class C(1)                                    %               %               --
- ------------------------------------------------------------------------------------------
 Class D(1)                                    %               %               --
- ------------------------------------------------------------------------------------------
 S&P 500 Index(2)                              %               %                  %
- ------------------------------------------------------------------------------------------
 Lipper Health/Biotechnology Funds
 Index(3)                                      %               %                  %
- ------------------------------------------------------------------------------------------
</TABLE>

1   Classes A, C and D commenced operations on July 28, 1997.

2   The Standard & Poor's (Registered Trademark) 500 Composite Stock Price Index
    is a broad-based index, the performance of which is based on the average
    performance of 500 widely held common stocks. The performance of the Index
    does not include any expenses, fees or charges. The Index is unmanaged and
    should not be considered an investment.

3   The Lipper Health/Biotechnology Funds Index is an equally-weighted
    performance index of the largest qualifying funds (based on net assets) in
    the Lipper Health/Biotechnology Funds objective. The Index, which is
    adjusted for capital gains distributions and income dividends, is unmanaged
    and should not be considered an investment. There are currently [ ] funds
    represented in this Index.


[GRAPHIC OMITTED]
             FEES AND EXPENSES
- ------------------------------
The table below briefly describes the fees and expenses that you may pay if you
buy and hold shares of the Fund. The Fund offers four Classes of shares:
Classes A, B, C and D. Each Class has a different combination of fees, expenses
and other features. The Fund does not charge account or exchange fees. See the
"Share Class Arrangements" section for further fee and expense information.

(side bar)
ANNUAL FUND OPERATING EXPENSES

These expenses are deducted from the Fund's assets and are based on expenses
paid for the fiscal year ended July 31, 1999.

SHAREHOLDER FEES

These fees are paid directly from your investment.
(end side bar)

<TABLE>
<CAPTION>
                                                      CLASS A         CLASS B         CLASS C       CLASS D
- --------------------------------------------------------------------------------------------------------------
<S>                                                <C>             <C>             <C>             <C>
 SHAREHOLDER FEES
- --------------------------------------------------------------------------------------------------------------
 Maximum sales charge (load) imposed on
 purchases (as a percentage of offering price)        5.25%(1)         None             None           None
- --------------------------------------------------------------------------------------------------------------
 Maximum deferred sales charge (load) (as a
 percentage based on the lesser of the offering
 price or net asset value at redemption)              None(2)          5.00%(3)         1.00%(4)       None
- --------------------------------------------------------------------------------------------------------------
 ANNUAL FUND OPERATING EXPENSES
- --------------------------------------------------------------------------------------------------------------
 Management fee                                           %                %                %              %
- --------------------------------------------------------------------------------------------------------------
 Distribution and service (12b-1) fees                0.25%                %            1.00%          None
- --------------------------------------------------------------------------------------------------------------
 Other expenses                                           %                %                %              %
- --------------------------------------------------------------------------------------------------------------
 Total annual Fund operating expenses                     %                %                %              %
- --------------------------------------------------------------------------------------------------------------
</TABLE>

1   Reduced for purchases of $25,000 and over.

2   Investments that are not subject to any sales charge at the time of purchase
    are subject to a CDSC of 1.00% that will be imposed if you sell your shares
    within one year after purchase, except for certain specific circumstances.

3   The CDSC is scaled down to 1.00% during the sixth year, reaching zero
    thereafter. See "Share Class Arrangements" for a complete discussion of the
    CDSC.

4   Only applicable if you sell your shares within one year after purchase.

<PAGE>

EXAMPLE
This example is intended to help you compare the cost of investing in the Fund
with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the Fund, your investment has a
5% return each year, and the Fund's operating expenses remain the same.
Although your actual costs may be higher or lower, the tables below show your
costs at the end of each period based on these assumptions depending upon
whether or not you sell your shares at the end of each period.


<TABLE>
<CAPTION>
                       IF YOU SOLD YOUR SHARES:                        IF YOU HELD YOUR SHARES:
<S>          <C>        <C>         <C>         <C>          <C>        <C>         <C>         <C>
             1 Year     3 Years     5 Years     10 Years     1 Year     3 Years     5 Years     10 Years
- ---------------------------------------------------------   -----------------------------------------------
 CLASS A     $          $           $           $            $          $           $           $
- ---------------------------------------------------------   -----------------------------------------------
 CLASS B     $          $           $           $            $          $           $           $
- ---------------------------------------------------------   -----------------------------------------------
 CLASS C     $          $           $           $            $          $           $           $
- ---------------------------------------------------------   -----------------------------------------------
 CLASS D     $          $           $           $            $          $           $           $
- ---------------------------------------------------------   -----------------------------------------------
</TABLE>

Long-term shareholders of Class B and Class C may pay more in sales charges,
including distribution fees, than the economic equivalent of the maximum
front-end sales charges permitted by the NASD.


[GRAPHIC OMITTED]
             ADDITIONAL INVESTMENT STRATEGY INFORMATION
- -------------------------------------------------------
This section provides additional information relating to the Fund's principal
strategies.

FIXED-INCOME SECURITIES. The Fund may invest up to 35% of its total assets in
preferred stock and investment grade debt securities.

DEFENSIVE INVESTING. The Fund may take temporary "defensive" positions in
attempting to respond to adverse market conditions. The Fund may invest any
amount of its assets in cash or money market instruments in a defensive posture
when the Investment Manager believes it is advisable to do so. Although taking
a defensive posture is designed to protect the Fund from an anticipated market
downturn, it could have the effect of reducing the benefit from any upswing in
the market. When the Fund takes a defensive position, it may not achieve its
investment objective.

PORTFOLIO TURNOVER. The Fund may engage in active and frequent trading of
portfolio securities to achieve its principal investment strategies. The
portfolio turnover rate is not expected to exceed 200% annually under normal
circumstances. A high turnover rate, such as 200%, will increase Fund brokerage
costs. It also may increase the Fund's capital gains, which are passed along to
Fund shareholders as distributions. This, in turn may increase your tax
liability as a Fund shareholder. See the sections on "Distributions" and "Tax
Consequences."

The percentage limitations relating to the composition of the Fund's portfolio
apply at the time the Fund acquires an investment. Subsequent percentage
changes that result from market fluctuations will not require the Fund to sell
any portfolio security. The Fund may change its principal investment strategies
without shareholder approval; however, you would be notified of any changes.


                                                                               5
<PAGE>

[GRAPHIC OMITTED]
             ADDITIONAL RISK INFORMATION
- ----------------------------------------
This section provides additional information relating to the principal risks of
investing in the Fund.

FIXED-INCOME SECURITIES. Principal risks of investing in the Fund are also
associated with its fixed-income securities. All fixed-income securities are
subject to two types of risk: credit risk and interest rate risk.

Credit risk refers to the possibility that the issuer of a security will be
unable to make interest payments and/or repay the principal on its debt. While
the Fund may invest in investment grade securities, certain of these securities
have speculative credit characteristics.

Interest rate risk refers to fluctuations in the value of a fixed-income
security resulting from changes in the general level of interest rates. When
the general level of interest rates goes up, the prices of most fixed-income
securities go down. When the general level of interest rates goes down, the
prices of most fixed-income securities go up.

YEAR 2000. The Fund could be adversely affected if the computer systems
necessary for the efficient operation of the Investment Manager, the Fund's
other service providers and the markets and corporate and governmental issuers
in which the Fund invests do not properly process and calculate date-related
information from and after January 1, 2000. While year 2000-related computer
problems could have a negative effect on the Fund, the Investment Manager and
its affiliates are working hard to avoid any problems and to obtain assurances
from their service providers that they are taking similar steps.

In addition, it is possible that the markets for securities in which the Fund
invests may be detrimentally affected by computer failures throughout the
financial services industry beginning January 1, 2000. Improperly functioning
trading systems may result in settlement problems and liquidity issues.
Corporate and governmental data processing errors also may result in production
problems for individual companies and overall economic uncertainties. Earnings
of individual issuers will be affected by remediation costs, which may be
substantial and may be reported inconsistently in U.S. and foreign financial
statements. Accordingly, the Fund's investments may be adversely affected.


6
<PAGE>

[GRAPHIC OMITTED]
             FUND MANAGEMENT
- ----------------------------
(side bar)
MORGAN STANLEY DEAN WITTER ADVISORS INC.

The Investment Manager is widely recognized as a leader in the mutual fund
industry and together with Morgan Stanley Dean Witter Services Company Inc.,
its wholly-owned subsidiary, has more than $136.9 billion in assets under
management or administration as of June 30, 1999.
(end side bar)

The Fund has retained the Investment Manager -- Morgan Stanley Dean Witter
Advisors Inc. -- to provide administrative services, manage its business affairs
and invest its assets, including the placing of orders for the purchase and sale
of portfolio securities. The Investment Manager is a wholly-owned subsidiary of
Morgan Stanley Dean Witter & Co., a preeminent global financial services firm
that maintains leading market positions in each of its three primary businesses:
securities, asset management and credit services. Its main business office is
located at Two World Trade Center, New York, NY 10048.

The Fund's portfolio is managed within the Investment Manager's Growth Group.
Teresa McRoberts, Vice President of the Investment Manager, has been the
primary portfolio manager since December 31, 1998. Ms. McRoberts has been a
portfolio manager with the Investment Manager since June 1, 1998, prior to
which she was employed at Fred Alger Management, Inc. (July 1994-May 1998).

The Fund pays the Investment Manager a monthly management fee as full
compensation for the services and facilities furnished to the Fund, and for
Fund expenses assumed by the Investment Manager. The fee is based on the Fund's
average daily net assets. For the fiscal year ended July 31, 1999, the Fund
accrued total compensation to the Investment Manager amounting to     % of the
Fund's average daily net assets.


                                                                               7
<PAGE>

SHAREHOLDER INFORMATION


[GRAPHIC OMITTED]
             PRICING FUND SHARES
- --------------------------------
The price of Fund shares (excluding sales charges), called "net asset value,"
is based on the value of the Fund's portfolio securities. While the assets of
each Class are invested in a single portfolio of securities, the net asset
value of each Class will differ because the Classes have different ongoing
distribution fees.

The net asset value per share of the Fund is determined once daily at 4:00 p.m.
Eastern time, on each day that the New York Stock Exchange is open (or, on days
when the New York Stock Exchange closes prior to 4:00 p.m., at such earlier
time). Shares will not be priced on days that the New York Stock Exchange is
closed.

The value of the Fund's portfolio securities is based on the securities' market
price when available. When a market price is not readily available, including
circumstances under which the Investment Manager determines that a security's
market price is not accurate, a portfolio security is valued at its fair value,
as determined under procedures established by the Fund's Board of Trustees. In
these cases, the Fund's net asset value will reflect certain portfolio
securities' fair value rather than their market price.

An exception to the Fund's general policy of using market prices concerns its
short-term debt portfolio securities. Debt securities with remaining maturities
of sixty days or less at the time of purchase are valued at amortized cost.
However, if the cost does not reflect the securities' market value, these
securities will be valued at their fair value.

[GRAPHIC OMITTED]
             HOW TO BUY SHARES
- ------------------------------
(side bar)
CONTACTING A FINANCIAL ADVISOR

If you are new to the Morgan Stanley Dean Witter Family of Funds and would like
to contact a Financial Advisor, call (800) THE-DEAN for the telephone number of
the Morgan Stanley Dean Witter office nearest you. You may also access our
office locator on our Internet site at: www.deanwitter.com/funds
(end side bar)

You may open a new account to buy Fund shares or buy additional Fund shares for
an existing account by contacting your Morgan Stanley Dean Witter Financial
Advisor or other authorized financial representative. Your Financial Advisor
will assist you, step-by-step, with the procedures to invest in the Fund. You
may also purchase shares directly by calling the Fund's transfer agent and
requesting an application.

Because every investor has different immediate financial needs and long-term
investment goals, the Fund offers investors four Classes of shares: Classes A,
B, C and D. Class D shares are only offered to a limited group of investors.
Each Class of shares offers a distinct structure of sales charges, distribution
and service fees, and other features that are designed to address a variety of
needs. Your Financial Advisor or other authorized financial representative can
help you decide which Class may be most appropriate for you. When purchasing
Fund shares, you must specify which Class of shares you wish to purchase.

When you buy Fund shares, the shares are purchased at the next share price
calculated (less any applicable front-end sales charge for Class A shares)
after we receive your purchase order. Your payment is due on the third business
day after you place your purchase order. We reserve the right to reject any
order for the purchase of Fund Shares.


8
<PAGE>

<TABLE>
<CAPTION>

     MINIMUM INVESTMENT AMOUNTS
- -------------------------------------------------------------------------------------------------------
                                                                               MINIMUM INVESTMENT
                                                                      ---------------------------------
INVESTMENT OPTIONS                                                        INITIAL           ADDITIONAL
- -------------------------------------------------------------------------------------------------------
<S>                                  <C>                               <C>               <C>
 Regular Accounts                                                         $1,000              $100
- -------------------------------------------------------------------------------------------------------
 Individual Retirement Accounts:     Regular IRAs                         $1,000              $100
                                     Education IRAs                       $500                $100
- -------------------------------------------------------------------------------------------------------
 EasyInvest(SM)                      (Automatically from your
                                     checking or savings account or
                                     Money Market Fund)                   $100*               $100*
- -------------------------------------------------------------------------------------------------------
</TABLE>
* Provided your schedule of investments totals $1,000 in twelve months.

(side bar)
EASYINVEST(SM)

A purchase plan that allows you to transfer money automatically from your
checking or savings account or from a Money Market Fund on a semi-monthly,
monthly or quarterly basis. Contact your Morgan Stanley Dean Witter Financial
Advisor for further information about this service.
(end side bar)

There is no minimum investment amount if you purchase Fund shares through: (1)
the Investment Manager's mutual fund asset allocation plan, (2) a program,
approved by the Fund's distributor, in which you pay an asset-based fee for
advisory, administrative and/or brokerage services, or (3) employer-sponsored
employee benefit plan accounts.

INVESTMENT OPTIONS FOR CERTAIN INSTITUTIONAL AND OTHER INVESTORS/CLASS D
SHARES. To be eligible to purchase Class D shares, you must qualify under one
of the investor categories specified in the "Share Class Arrangements" section
of this Prospectus.

SUBSEQUENT INVESTMENTS SENT DIRECTLY TO THE FUND. In addition to buying
additional Fund shares for an existing account by contacting your Morgan
Stanley Dean Witter Financial Advisor, you may send a check directly to the
Fund. To buy additional shares in this manner:

o Write a "letter of instruction" to the Fund specifying the name(s) on the
  account, the account number, the social security or tax identification
  number, the Class of shares you wish to purchase and the investment amount
  (which would include any applicable front-end sales charge). The letter must
  be signed by the account owner(s).

o Make out a check for the total amount payable to: Morgan Stanley Dean Witter
  Health Sciences Trust.

o Mail the letter and check to Morgan Stanley Dean Witter Trust FSB at P.O. Box
  1040, Jersey City, NJ 07303.

[GRAPHIC OMITTED]
             HOW TO EXCHANGE SHARES
- -----------------------------------
PERMISSIBLE FUND EXCHANGES. You may exchange shares of any Class of the Fund
for the same Class of any other continuously offered Multi-Class Fund, or for
shares of a No-Load Fund, a Money Market Fund, North American Government Income
Trust or Short-Term U.S. Treasury Trust, without the imposition of an exchange
fee. See the inside back cover of this Prospectus for each Morgan Stanley Dean
Witter Fund's designation as a Multi-Class Fund, No- Load Fund or Money Market
Fund. If a Morgan Stanley Dean Witter Fund is not listed, consult the inside
back cover of that Fund's Prospectus for its designation. For purposes of
exchanges, shares of FSC Funds (subject to a front-end sales charge) are
treated as Class A shares of a Multi-Class Fund.


                                                                               9
<PAGE>


Exchanges may be made after shares of the Fund acquired by purchase have been
held for thirty days. There is no waiting period for exchanges of shares
acquired by exchange or dividend reinvestment. The current Prospectus for each
Fund describes its investment objective(s), policies and investment minimums,
and should be read before investment.

EXCHANGE PROCEDURES. You can process an exchange by contacting your Morgan
Stanley Dean Witter Financial Advisor or other authorized financial
representative. Otherwise, you must forward an exchange privilege authorization
form to the Fund's transfer agent -- Morgan Stanley Dean Witter Trust FSB --
and then write the transfer agent or call (800) 869-NEWS to place an exchange
order. You can obtain an exchange privilege authorization form by contacting
your Financial Advisor or other authorized financial representative or by
calling (800) 869-NEWS. If you hold share certificates, no exchanges may be
processed until we have received all applicable share certificates.

An exchange to any Morgan Stanley Dean Witter Fund (except a Money Market Fund)
is made on the basis of the next calculated net asset values of the Funds
involved after the exchange instructions are accepted. When exchanging into a
Money Market Fund, the Fund's shares are sold at their next calculated net
asset value and the Money Market Fund's shares are purchased at their net asset
value on the following business day.

The Fund may terminate or revise the exchange privilege upon required notice.
The check writing privilege is not available for Money Market Fund shares you
acquire in an exchange.

TELEPHONE EXCHANGES. For your protection when calling Morgan Stanley Dean
Witter Trust FSB, we will employ reasonable procedures to confirm that exchange
instructions communicated over the telephone are genuine. These procedures may
include requiring various forms of personal identification such as name,
mailing address, social security or other tax identification number. Telephone
instructions also may be recorded.

Telephone instructions will be accepted if received by the Fund's transfer
agent between 9:00 a.m. and 4:00 p.m. Eastern time, on any day the New York
Stock Exchange is open for business. 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 Fund in
the past.

MARGIN ACCOUNTS. If you have pledged your Fund shares in a margin account,
contact your Morgan Stanley Dean Witter Financial Advisor or other authorized
financial representative regarding restrictions on the exchange of such shares.


TAX CONSIDERATIONS OF EXCHANGES. If you exchange shares of the Fund for shares
of another Morgan Stanley Dean Witter Fund there are important tax
considerations. For tax purposes, the exchange out of the Fund is considered a
sale of Fund shares -- and the exchange into the other Fund is considered a
purchase. As a result, you may realize a capital gain or loss.


10
<PAGE>

You should review the "Tax Consequences" section and consult your own tax
professional about the tax consequences of an exchange.

FREQUENT EXCHANGES. A pattern of frequent exchanges may result in the Fund
limiting or prohibiting, at its discretion, additional purchases and/or
exchanges. The Fund will notify you in advance of limiting your exchange
privileges.

CDSC CALCULATIONS ON EXCHANGES. See the "Share Class Arrangements" section of
this Prospectus for a further discussion of how applicable contingent deferred
sales charges (CDSCs) are calculated for shares of one Morgan Stanley Dean
Witter Fund that are exchanged for shares of another.

For further information regarding exchange privileges, you should contact your
Morgan Stanley Dean Witter Financial Advisor or call (800) 869-NEWS.

[GRAPHIC OMITTED]
             HOW TO SELL SHARES
- -------------------------------
You can sell some or all of your Fund shares at any time. If you sell Class A,
Class B or Class C shares, your net sale proceeds are reduced by the amount of
any applicable CDSC. Your shares will be sold at the next price calculated
after we receive your order to sell as described below.

<TABLE>
<S>                  <C>
 OPTIONS             PROCEDURES
- --------------------------------------------------------------------------------------------------------
 Contact Your        To sell your shares, simply call your Morgan Stanley Dean Witter Financial
 Financial Advisor   Advisor or other authorized financial representative.
                     -----------------------------------------------------------------------------------
[GRAPHIC OMITTED]    Payment will be sent to the address to which the account is registered or
                     deposited in your brokerage account.
- --------------------------------------------------------------------------------------------------------
 By Letter           You can also sell your shares by writing a "letter of instruction" that includes:
                     o your account number;
[GRAPHIC OMITTED]    o the dollar amount or the number of shares you wish to sell;
                     o the Class of shares you wish to sell; and
                     o the signature of each owner as it appears on the account.
                     -----------------------------------------------------------------------------------
                     If you are requesting payment to anyone other than the registered owner(s) or
                     that payment be sent to any address other than the address of the registered
                     owner(s) or pre-designated bank account, you will need a signature guarantee.
                     You can obtain a signature guarantee from an eligible guarantor acceptable to
                     Morgan Stanley Dean Witter Trust FSB. (You should contact Morgan Stanley
                     Dean Witter Trust FSB at (800) 869-NEWS for a determination as to whether a
                     particular institution is an eligible guarantor.) A notary public cannot provide a
                     signature guarantee. Additional documentation may be required for shares held
                     by a corporation, partnership, trustee or executor.
                     -----------------------------------------------------------------------------------
                     Mail the letter to Morgan Stanley Dean Witter Trust FSB at P.O. Box 983, Jersey
                     City, NJ 07303. If you hold share certificates, you must return the certificates,
                     along with the letter and any required additional documentation.
                     -----------------------------------------------------------------------------------
                     A check will be mailed to the name(s) and address in which the account is
                     registered, or otherwise according to your instructions.
                     -----------------------------------------------------------------------------------
</TABLE>

                                                                              11
<PAGE>

<TABLE>
<S>                <C>
 OPTIONS           PROCEDURES
- -----------------------------------------------------------------------------------------------------
 Systematic        If your investment in all of the Morgan Stanley Dean Witter Family of Funds has
 Withdrawal Plan   a total market value of at least $10,000, you may elect to withdraw amounts of
                   $25 or more, or in any whole percentage of a Fund's balance (provided the
[GRAPHIC OMITTED]  amount is at least $25), on a monthly, quarterly, semi-annual or annual basis,
                   from any Fund with a balance of at least $1,000. Each time you add a Fund to the
                   plan, you must meet the plan requirements.
                   ----------------------------------------------------------------------------------
                   Amounts withdrawn are subject to any applicable CDSC. A CDSC may be
                   waived under certain circumstances. See the Class B waiver categories listed in
                   the "Share Class Arrangements" section of this Prospectus.
                   ----------------------------------------------------------------------------------
                   To sign up for the Systematic Withdrawal Plan, contact your Morgan Stanley
                   Dean Witter Financial Advisor or call (800) 869-NEWS. You may terminate or
                   suspend your plan at any time. Please remember that withdrawals from the plan
                   are sales of shares, not Fund "distributions," and ultimately may exhaust your
                   account balance. The Fund may terminate or revise the plan at any time.
- -----------------------------------------------------------------------------------------------------
</TABLE>

PAYMENT FOR SOLD SHARES. After we receive your complete instructions to sell as
described above, a check will be mailed to you within seven days, although we
will attempt to make payment within one business day. Payment may also be sent
to your brokerage account.

Payment may be postponed or the right to sell your shares suspended under
unusual circumstances. If you request to sell shares that were recently
purchased by check, payment of the sale proceeds may be delayed for the minimum
time needed to verify that the check has been honored (not more than fifteen
days from the time we receive the check).

TAX CONSIDERATIONS. Normally, your sale of Fund shares is subject to federal
and state income tax. You should review the "Tax Consequences" section of this
Prospectus and consult your own tax professional about the tax consequences of
a sale.

REINSTATEMENT PRIVILEGE. If you sell Fund shares and have not previously
exercised the reinstatement privilege, you may, within 35 days after the date
of sale, invest any portion of the proceeds in the same Class of Fund shares at
their net asset value and receive a pro rata credit for any CDSC paid in
connection with the sale.

INVOLUNTARY SALES. The Fund reserves the right, on sixty days' notice, to sell
the shares of any shareholder (other than shares held in an IRA or 403(b)
Custodial Account) whose shares, due to sales by the shareholder, have a value
below $100, or in the case of an account opened through EasyInvestSM, if after
12 months the shareholder has invested less than $1,000 in the account.

However, before the Fund sells your shares in this manner, we will notify you
and allow you sixty days to make an additional investment in an amount that
will increase the value of your account to at least the required amount before
the sale is processed. No CDSC will be imposed on any involuntary sale.

MARGIN ACCOUNTS. If you have pledged your Fund shares in a margin account,
contact your Morgan Stanley Dean Witter Financial Advisor or other authorized
financial representative regarding restrictions on the sale of such shares.


12
<PAGE>

[GRAPHIC OMITTED]
             DISTRIBUTIONS
- --------------------------
(side bar)
TARGETED DIVIDENDS(SM)

You may select to have your Fund distributions automatically invested in other
Classes of Fund shares or Classes of another Morgan Stanley Dean Witter Fund
that you own. Contact your Morgan Stanley Dean Witter Financial Advisor for
further information about this service.
(end side bar)

The Fund passes substantially all of its earnings from income and capital gains
along to its investors as "distributions." The Fund earns income from stocks and
interest from fixed-income investments. These amounts are passed along to Fund
shareholders as "income dividend distributions." The Fund realizes capital gains
whenever it sells securities for a higher price than it paid for them. These
amounts may be passed along as "capital gain distributions."

The Fund declares income dividends separately for each Class. Distributions
paid on Class A and Class D shares usually will be higher than for Class B and
Class C because distribution fees that Class B and Class C pay are higher.
Normally, income dividends are distributed to shareholders annually. Capital
gains, if any, are usually distributed in December. The Fund, however, may
retain and reinvest any long-term capital gains. The Fund may at times make
payments from sources other than income or capital gains that represent a
return of a portion of your investment.

Distributions are reinvested automatically in additional shares of the same
Class and automatically credited to your account, unless you request in writing
that all distributions be paid in cash. If you elect the cash option, the Fund
will mail a check to you no later than seven business days after the
distribution is declared. No interest will accrue on uncashed checks. If you
wish to change how your distributions are paid, your request should be received
by the Fund's transfer agent, Morgan Stanley Dean Witter Trust FSB, at least
five business days prior to the record date of the distributions.

[GRAPHIC OMITTED]
             TAX CONSEQUENCES
- -----------------------------
As with any investment, you should consider how your Fund investment will be
taxed. The tax information in this Prospectus is provided as general
information. You should consult your own tax professional about the tax
consequences of an investment in the Fund.

Unless your investment in the Fund is through a tax-deferred retirement
account, such as a 401(k) plan or IRA, you need to be aware of the possible tax
consequences when:

o The Fund makes distributions; and

o You sell Fund shares, including an exchange to another Morgan Stanley Dean
  Witter Fund.

TAXES ON DISTRIBUTIONS. Your distributions are normally subject to federal and
state income tax when they are paid, whether you take them in cash or reinvest
them in Fund shares. A distribution also may be subject to local income tax.
Any income dividend distributions and any short-term capital gain distributions
are taxable to you as ordinary income. Any long-term capital gain distributions
are taxable as long-term capital gains, no matter how long you have owned
shares in the Fund.

Every January, you will be sent a statement (IRS Form 1099-DIV) showing the
taxable distributions paid to you in the previous year. The statement provides
full information on your dividends and capital gains for tax purposes.


                                                                              13
<PAGE>

TAXES ON SALES. Your sale of Fund shares normally is subject to federal and
state income tax and may result in a taxable gain or loss to you. A sale also
may be subject to local income tax. Your exchange of Fund shares for shares of
another Morgan Stanley Dean Witter Fund is treated for tax purposes like a sale
of your original shares and a purchase of your new shares. Thus, the exchange
may, like a sale, result in a taxable gain or loss to you and will give you a
new tax basis for your new shares.

When you open your Fund account, you should provide your social security or tax
identification number on your investment application. By providing this
information, you will avoid being subject to a federal backup withholding tax
of 31% on taxable distributions and redemption proceeds. Any withheld amount
would be sent to the IRS as an advance tax payment.

[GRAPHIC OMITTED]
             SHARE CLASS ARRANGEMENTS
- -------------------------------------
The Fund offers several Classes of shares having different distribution
arrangements designed to provide you with different purchase options according
to your investment needs. Your Morgan Stanley Dean Witter Financial Advisor or
other authorized financial representative can help you decide which Class may
be appropriate for you.

The general public is offered three Classes: Class A shares, Class B shares and
Class C shares, which differ principally in terms of sales charges and ongoing
expenses. A fourth Class, Class D shares, is offered only to a limited category
of investors. Shares that you acquire through reinvested distributions will not
be subject to any front-end sales charge or CDSC -- contingent deferred sales
charge. Sales personnel may receive different compensation for selling each
Class of shares. The sales charges applicable to each Class provide for the
distribution financing of shares of that Class.

The chart below compares the sales charge and maximum annual 12b-1 fee
applicable to each Class:

<TABLE>
<CAPTION>
                                                                                   MAXIMUM
CLASS     SALES CHARGE                                                         ANNUAL 12b-1 FEE
- ---------------------------------------------------------------------------------------------------
<S>       <C>                                                                 <C>
  A       Maximum 5.25% initial sales charge reduced for purchase of
          $25,000 or more; shares sold without an initial sales charge are
          generally subject to a 1.0% CDSC during the first year                    0.25%
- ---------------------------------------------------------------------------------------------------
  B       Maximum 5.0% CDSC during the first year decreasing to 0%
          after six years                                                           1.0%
- ---------------------------------------------------------------------------------------------------
  C       1.0% CDSC during the first year                                           1.0%
- ---------------------------------------------------------------------------------------------------
  D       None                                                                      None
- ---------------------------------------------------------------------------------------------------
</TABLE>

14
<PAGE>

CLASS A SHARES  Class A shares are sold at net asset value plus an initial sales
charge of up to 5.25%. The initial sales charge is reduced for purchases of
$25,000 or more according to the schedule below. Investments of $1 million or
more are not subject to an initial sales charge, but are generally subject to a
contingent deferred sales charge, or CDSC, of 1.0% on sales made within one year
after the last day of the month of purchase. The CDSC will be assessed in the
same manner and with the same CDSC waivers as with Class B shares. Class A
shares are also subject to a distribution (12b-1) fee of up to 0.25% of the
average daily net assets of the Class.

The offering price of Class A shares includes a sales charge (expressed as a
percentage of the offering price) on a single transaction as shown in the
following table:

(side bar)
FRONT-END SALES CHARGE OR FSC
An initial sales charge you pay when purchasing Class A shares that is based on
a percentage of the offering price. The percentage declines based upon the
dollar value of Class A shares you purchase. We offer three ways to reduce your
Class A sales charges -- the Combined Purchase Privilege, Right of Accumulation
and Letter of Intent.
(end side bar)
<TABLE>
<CAPTION>
                                                    FRONT-END SALES CHARGE
                                     -------------------------------------------------------
                                            PERCENTAGE OF         APPROXIMATE PERCENTAGE
AMOUNT OF SINGLE TRANSACTION            PUBLIC OFFERING PRICE     OF NET AMOUNT INVESTED
- --------------------------------------------------------------------------------------------
<S>                                    <C>                       <C>
 Less than $25,000                             5.25%                     5.54%
- --------------------------------------------------------------------------------------------
 $25,000 but less than $50,000                 4.75%                     4.99%
- --------------------------------------------------------------------------------------------
 $50,000 but less than $100,000                4.00%                     4.17%
- --------------------------------------------------------------------------------------------
 $100,000 but less than $250,000               3.00%                     3.09%
- --------------------------------------------------------------------------------------------
 $250,000 but less than $1 million             2.00%                     2.04%
- --------------------------------------------------------------------------------------------
 $1 million and over                              0                         0
- --------------------------------------------------------------------------------------------
</TABLE>

The reduced sales charge schedule is applicable to purchases of Class A shares
in a single transaction by:

o A single account (including an individual, trust or fiduciary account).

o Family member accounts (limited to husband, wife and children under the age
  of 21).

o Pension, profit sharing or other employee benefit plans of companies and
  their affiliates.

o Tax-exempt organizations.

o Groups organized for a purpose other than to buy mutual fund shares.

COMBINED PURCHASE PRIVILEGE. You also will have the benefit of reduced sales
charges by combining purchases of Class A shares of the Fund in a single
transaction with purchases of Class A shares of other Multi-Class Funds and
shares of FSC Funds.

RIGHT OF ACCUMULATION. You also may benefit from a reduction of sales charges
if the cumulative net asset value of Class A shares of the Fund purchased in a
single transaction, together with shares of other Funds you currently own which
were previously purchased at a price including a front-end sales charge
(including shares acquired through reinvestment of distributions), amounts to
$25,000 or more. Also, if you have a cumulative net asset value of all your
Class A and Class D shares equal to at least $5 million (or $25 million for
certain employee benefit plans), you are eligible to purchase Class D shares of
any Fund subject to the Fund's minimum initial investment requirement.


                                                                              15
<PAGE>


You must notify your Morgan Stanley Dean Witter Financial Advisor or other
authorized financial representative (or Morgan Stanley Dean Witter Trust FSB if
you purchase directly through the Fund), 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 when an order is
placed by mail. The reduced sales charge will not be granted if: (i)
notification is not furnished at the time of the order; or (ii) a review of the
records of Dean Witter Reynolds or other authorized dealer of Fund shares or
the Fund's transfer agent does not confirm your represented holdings.

LETTER OF INTENT. The schedule of reduced sales charges for larger purchases
also will be available to you if you enter into a written "letter of intent." A
letter of intent provides for the purchase of Class A shares of the Fund or
other Multi-Class Funds or shares of FSC Funds within a thirteen-month period.
The initial purchase under a letter of intent must be at least 5% of the stated
investment goal. To determine the applicable sales charge reduction, you may
also include: (1) the cost of shares of other Morgan Stanley Dean Witter Funds
which were previously purchased at a price including a front-end sales charge
during the 90-day period prior to the distributor receiving the letter of
intent, and (2) the cost of shares of other Funds you currently own acquired in
exchange for shares of Funds purchased during that period at a price including
a front-end sales charge. You can obtain a letter of intent by contacting your
Morgan Stanley Dean Witter Financial Advisor or other authorized financial
representative, or by calling (800) 869-NEWS. If you do not achieve the stated
investment goal within the thirteen-month period, you are required to pay the
difference between the sales charges otherwise applicable and sales charges
actually paid, which may be deducted from your investment.

OTHER SALES CHARGE WAIVERS. In addition to investments of $1 million or more,
your purchase of Class A shares is not subject to a front-end sales charge (or
a CDSC upon sale) if your account qualifies under one of the following
categories:

o A trust for which Morgan Stanley Dean Witter Trust FSB provides discretionary
  trustee services.

o Persons participating in a fee-based investment program (subject to all of
  its terms and conditions, including mandatory sale or transfer restrictions
  on termination) approved by the Fund's distributor pursuant to which they
  pay an asset-based fee for investment advisory, administrative and/or
  brokerage services.

o Employer-sponsored employee benefit plans, whether or not qualified under the
  Internal Revenue Code, for which Morgan Stanley Dean Witter Trust FSB serves
  as trustee or Dean Witter Reynolds' Retirement Plan Services serves as
  recordkeeper under a written Recordkeeping Services Agreement ("MSDW
  Eligible Plans") which have at least 200 eligible employees.

o An MSDW Eligible Plan whose Class B shares have converted to Class A shares,
  regardless of the plan's asset size or number of eligible employees.

o A client of a Morgan Stanley Dean Witter Financial Advisor who joined us from
  another investment firm within six months prior to the date of purchase of
  Fund shares, and you used the proceeds from the sale of shares of a
  proprietary mutual


16
<PAGE>


  fund of that Financial Advisor's previous firm that imposed either a front-end
  or deferred sales charge to purchase Class A shares, provided that: (1) you
  sold the shares not more than 60 days prior to the purchase of Fund shares,
  and (2) the sale proceeds were maintained in the interim in cash or a money
  market fund.

o Current or retired Directors/Trustees of the Morgan Stanley Dean Witter
  Funds, such persons' spouses and children under the age of 21, and trust
  accounts for which any of such persons is a beneficiary.

o Current or retired directors, officers and employees of Morgan Stanley Dean
  Witter & Co. and any of its subsidiaries, such persons' spouses and children
  under the age of 21, and trust accounts for which any of such persons is a
  beneficiary.

CLASS B SHARES  Class B shares are offered at net asset value with no initial
sales charge but are subject to a contingent deferred sales charge, or CDSC, as
set forth in the table below. For the purpose of calculating the CDSC, shares
are deemed to have been purchased on the last day of the month during which they
were purchased.

(side bar)
CONTINGENT DEFERRED SALES CHARGE OR CDSC

A fee you pay when you sell shares of certain Morgan Stanley Dean Witter Funds
purchased without an initial sales charge. This fee declines the longer you
hold your shares as set forth in the table.
(end side bar)

<TABLE>
<CAPTION>
YEAR SINCE PURCHASE PAYMENT MADE    CDSC AS A PERCENTAGE OF AMOUNT REDEEMED
- ----------------------------------------------------------------------------
<S>                                <C>
 First                                               5.0%
- ----------------------------------------------------------------------------
 Second                                              4.0%
- ----------------------------------------------------------------------------
 Third                                               3.0%
- ----------------------------------------------------------------------------
 Fourth                                              2.0%
- ----------------------------------------------------------------------------
 Fifth                                               2.0%
- ----------------------------------------------------------------------------
 Sixth                                               1.0%
- ----------------------------------------------------------------------------
 Seventh and thereafter                              None
- ----------------------------------------------------------------------------
</TABLE>

Each time you place an order to sell or exchange shares, shares with no CDSC
will be sold or exchanged first, then shares with the lowest CDSC will be sold
or exchanged next. For any shares subject to a CDSC, the CDSC will be assessed
on an amount equal to the lesser of the current market value or the cost of the
shares being sold.

CDSC WAIVERS. A CDSC, if otherwise applicable, will be waived in the case of:

o Sales of shares held at the time you die or become disabled (within the
  definition in Section 72(m)(7) of the Internal Revenue Code which relates to
  the ability to engage in gainful employment), if the shares are: (i)
  registered either in your name (not a trust) or in the names of you and your
  spouse as joint tenants with right of survivorship; or (ii) held in a
  qualified corporate or self-employed retirement plan, IRA or 403(b)
  Custodial Account, provided in either case that the sale is requested within
  one year of your death or initial determination of disability.

o Sales in connection with the following retirement plan "distributions": (i)
  lump-sum or other distributions from a qualified corporate or self-employed
  retirement plan following retirement (or, in the case of a "key employee" of
  a "top heavy" plan, following attainment of age 591/2); (ii) distributions
  from an IRA or 403(b) Custodial Account following attainment of age 591/2;
  or (iii) a tax-free return of an excess IRA contribution (a "distribution"
  does not include a direct transfer of IRA, 403(b) Custodial Account or
  retirement plan assets to a successor custodian or trustee).


                                                                              17
<PAGE>

o Sales of shares held for you as a participant in an MSDW Eligible Plan.

o Sales of shares in connection with the Systematic Withdrawal Plan of up to
  12% annually of the value of each Fund from which plan sales are made. The
  percentage is determined on the date you establish the Systematic Withdrawal
  Plan and based on the next calculated share price. You may have this CDSC
  waiver applied in amounts up to 1% per month, 3% per quarter, 6%
  semi-annually or 12% annually. Shares with no CDSC will be sold first,
  followed by those with the lowest CDSC. As such, the waiver benefit will be
  reduced by the amount of your shares that are not subject to a CDSC. If you
  suspend your participation in the plan, you may later resume plan payments
  without requiring a new determination of the account value for the 12% CDSC
  waiver.

o Sales of shares that (i) certain unit investment trusts purchased (on which a
  sales charge has been paid) or (ii) are attributable to reinvested
  distributions from, or the proceeds of, certain unit investment trusts.

All waivers will be granted only following the Fund's distributor receiving
confirmation of your entitlement. If you believe you are eligible for a CDSC
waiver, please contact your Financial Advisor or call (800) 869-NEWS.

DISTRIBUTION FEE. Class B shares are subject to an annual distribution (12b-1)
fee of 1.0% of the lesser of: (a) the average daily aggregate gross purchases
by all shareholders of the Fund's Class B shares since the inception of the
Fund (not including reinvestments of dividends or capital gains distributions),
less the average daily aggregate net asset value of the Fund's Class B shares
sold by all shareholders since the Fund's inception upon which a CDSC has been
imposed or waived, or (b) the average daily net assets of Class B.

CONVERSION FEATURE. After ten (10) years, Class B shares will convert
automatically to Class A shares of the Fund with no initial sales charge. The
ten year period runs from the last day of the month in which the shares were
purchased, or in the case of Class B shares acquired through an exchange, from
the last day of the month in which the original Class B shares were purchased;
the shares will convert to Class A shares based on their relative net asset
values in the month following the ten year period. At the same time, an equal
proportion of Class B shares acquired through automatically reinvested
distributions will convert to Class A shares on the same basis. (Class B shares
held before May 1, 1997, however, will convert to Class A shares in May 2007.)

In the case of Class B shares held in an MSDW Eligible Plan, the plan is
treated as a single investor and all Class B shares will convert to Class A
shares on the conversion date of the Class B shares of a Morgan Stanley Dean
Witter Fund purchased by that plan.

Currently, the Class B share conversion is not a taxable event; the conversion
feature may be cancelled if it is deemed a taxable event in the future by the
Internal Revenue Service.

If you exchange your Class B shares for shares of a Money Market Fund, a
No-Load Fund, North American Government Income Trust or Short-Term U.S.
Treasury Trust,


18
<PAGE>

the holding period for conversion is frozen as of the last day of the month of
the exchange and resumes on the last day of the month you exchange back into
Class B shares.

EXCHANGING SHARES SUBJECT TO A CDSC. There are special considerations when you
exchange Fund shares that are subject to a CDSC. When determining the length of
time you held the shares and the corresponding CDSC rate, any period (starting
at the end of the month) during which you held shares of a fund that does not
charge a CDSC will not be counted. Thus, in effect the "holding period" for
purposes of calculating the CDSC is frozen upon exchanging into a fund that
does not charge a CDSC.

For example, if you held Class B shares of the Fund in a regular account for
one year, exchanged to Class B of another Morgan Stanley Dean Witter
Multi-Class Fund for another year, then sold your shares, a CDSC rate of 4%
would be imposed on the shares based on a two year holding period -- one year
for each Fund. However, if you had exchanged the shares of the Fund for a Money
Market Fund (which does not charge a CDSC) instead of the Multi-Class Fund,
then sold your shares, a CDSC rate of 5% would be imposed on the shares based
on a one year holding period. The one year in the Money Market Fund would not
be counted. Nevertheless, if shares subject to a CDSC are exchanged for a Fund
that does not charge a CDSC, you will receive a credit when you sell the shares
equal to the distribution (12b-1) fees, if any, you paid on those shares while
in that Fund up to the amount of any applicable CDSC.

In addition, shares that are exchanged into or from a Morgan Stanley Dean
Witter Fund subject to a higher CDSC rate will be subject to the higher rate,
even if the shares are re-exchanged into a Fund with a lower CDSC rate.

CLASS C SHARES  Class C shares are sold at net asset value with no initial sales
charge but are subject to a CDSC of 1.0% on sales made within one year after the
last day of the month of purchase. The CDSC will be assessed in the same manner
and with the same CDSC waivers as with Class B shares.

DISTRIBUTION FEE. Class C shares are subject to an annual distribution (12b-1)
fee of up to 1.0% of the average daily net assets of that Class. The Class C
shares' distribution fee may cause that Class to have higher expenses and pay
lower dividends than Class A or Class D shares. Unlike Class B shares, Class C
shares have no conversion feature and, accordingly, an investor that purchases
Class C shares may be subject to distribution (12b-1) fees applicable to Class
C shares for an indefinite period.

CLASS D SHARES  Class D shares are offered without any sales charge on purchases
or sales and without any distribution (12b-1) fee. Class D shares are offered
only to investors meeting an initial investment minimum of $5 million ($25
million for MSDW Eligible Plans) and the following investor categories:

o Investors participating in the Investment Manager's mutual fund asset
  allocation program (subject to all of its terms and conditions, including
  mandatory sale or transfer restrictions on termination) pursuant to which
  they pay an asset-based fee.

o Persons participating in a fee-based investment program (subject to all of
  its terms and conditions, including mandatory sale or transfer restrictions
  on termination)


                                                                              19
<PAGE>

 approved by the Fund's distributor pursuant to which they pay an asset-based
 fee for investment advisory, administrative and/or brokerage services.

o Employee benefit plans maintained by Morgan Stanley Dean Witter & Co. or any
  of its subsidiaries for the benefit of certain employees of Morgan Stanley
  Dean Witter & Co. and its subsidiaries.

o Certain unit investment trusts sponsored by Dean Witter Reynolds.

o Certain other open-end investment companies whose shares are distributed by
  the Fund's distributor.

o Investors who were shareholders of the Dean Witter Retirement Series on
  September 11, 1998 for additional purchases for their former Dean Witter
  Retirement Series accounts.

MEETING CLASS D ELIGIBILITY MINIMUMS. To meet the $5 million ($25 million for
MSDW Eligible Plans) initial investment to qualify to purchase Class D shares
you may combine: (1) purchases in a single transaction of Class D shares of the
Fund and other Morgan Stanley Dean Witter Multi-Class Funds and/or (2) previous
purchases of Class A and Class D shares of Multi-Class Funds and shares of FSC
Funds you currently own, along with shares of Morgan Stanley Dean Witter Funds
you currently own that you acquired in exchange for those shares.

NO SALES CHARGES FOR REINVESTED CASH DISTRIBUTIONS  If you receive a cash
payment representing an income dividend or capital gain and you reinvest that
amount in the applicable Class of shares by returning the check within 30 days
of the payment date, the purchased shares would not be subject to an initial
sales charge or CDSC.

PLAN OF DISTRIBUTION (RULE 12b-1 FEES)  The Fund has adopted a Plan of
Distribution in accordance with Rule 12b-1 under the Investment Company Act of
1940 with respect to the distribution of Class A, Class B and Class C shares.
The Plan allows the Fund to pay distribution fees for the sale and distribution
of these shares. It also allows the Fund to pay for services to shareholders of
Class A, Class B and Class C shares. Because these fees are paid out of the
Fund's assets on an ongoing basis, over time these fees will increase the cost
of your investment in these Classes and may cost you more than paying other
types of sales charges.


20
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the Fund's
financial performance for the past 5 fiscal years of the Fund. Certain
information reflects financial results for a single Fund share throughout each
year. The total returns in the table represent the rate an investor would have
earned or lost on an investment in the Fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by                      , independent
accountants, whose report, along with the Fund's financial statements, is
included in the annual report, which is available upon request.




<TABLE>
<CAPTION>
FOR THE YEAR ENDED JULY 31,                           1999            1998*            1997            1996            1995
- --------------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>            <C>                  <C>             <C>             <C>
 CLASS B SHARES
 SELECTED PER SHARE DATA:
 Net asset value, beginning of period               $              $              $              $              $
- --------------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:

  Net investment loss

  Net realized and unrealized gain (loss)
                                                     ----------      ----------      ----------      ----------      ----------
 Total income (loss) from investment operations
- --------------------------------------------------------------------------------------------------------------------------------
 Less dividends and distributions:

  In excess of net investment income                       --              --               --

  From net realized gain                                                   --               --              --              --
                                                     ----------      ----------      ----------      ----------      ----------
 Total dividends and distributions                                         --               --
- --------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                     $              $              $              $              $
- --------------------------------------------------------------------------------------------------------------------------------
 TOTAL RETURN                                               %               %               %               %               %
- --------------------------------------------------------------------------------------------------------------------------------
 RATIOS TO AVERATE NET ASSETS:
- --------------------------------------------------------------------------------------------------------------------------------
 Expenses                                                   %               %               %               %               %
- --------------------------------------------------------------------------------------------------------------------------------
 Net investment loss                                        %               %               %               %               %
- --------------------------------------------------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
- --------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands            $              $              $              $              $
- --------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                    %               %               %               %               %
- --------------------------------------------------------------------------------------------------------------------------------
</TABLE>

*     Prior to July 28, 1997, the Fund issued one class of shares. All shares
of the Fund held prior to that date have been designated Class B shares.

                                                                              21
<PAGE>


<TABLE>
<CAPTION>
                                                               FOR THE PERIOD
                                                               JULY 28, 1997*
                                                                  THROUGH
FOR THE YEAR ENDED JULY 31,                   1999     1998    JULY 31, 1997
- --------------------------------------------------------------------------------
<S>                                         <C>      <C>      <C>
 CLASS A SHARES
- --------------------------------------------------------------------------------
 SELECTED PER SHARE DATA:
- --------------------------------------------------------------------------------
 Net asset value, beginning of period        $       $         $
- --------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss
  Net realized and unrealized gain
                                              ------   ------    ------
 Total income from investment operations
- --------------------------------------------------------------------------------
 Less distributions from
  Net realized gain                                                 --
                                              ------   ------    ------
 Net asset value, end of period              $       $         $
- --------------------------------------------------------------------------------
 TOTAL RETURN                                      %         %         %
- --------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
- --------------------------------------------------------------------------------
 Expenses                                          %         %         %
- --------------------------------------------------------------------------------
 Net investment loss                               %         %         %
- --------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
- --------------------------------------------------------------------------------
 Net assets, end of period, in thousands     $       $         $
- --------------------------------------------------------------------------------
 Portfolio turnover rate                           %         %         %


 CLASS C SHARES
- --------------------------------------------------------------------------------
 SELECTED PER SHARE DATA:
- --------------------------------------------------------------------------------
 Net asset value, beginning of period        $       $         $
- --------------------------------------------------------------------------------
 Income (loss) from Investment operations:
  Net investment loss
  Net realized and unrealized gain
                                              ------   ------    ------
 Total income from investment operations
- --------------------------------------------------------------------------------
 Less distributions from
  Net realized gain                                                 --
                                              ------   ------    ------
    Net asset value, end of period           $       $         $
- --------------------------------------------------------------------------------
 TOTAL RETURN                                    %       %        %
- --------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS
- --------------------------------------------------------------------------------
 Expenses                                        %       %        %
- --------------------------------------------------------------------------------
 Net investment loss                             %       %        %
- --------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
- --------------------------------------------------------------------------------
 Net assets, end of period, in thousands     $       $         $
- --------------------------------------------------------------------------------
 Portfolio turnover rate                         %       %          %
- --------------------------------------------------------------------------------
</TABLE>
*     The date shares were first issued.

22
<PAGE>


<TABLE>
<CAPTION>

                                                               FOR THE PERIOD
                                                               JULY 28, 1997*
                                                                  THROUGH
FOR THE YEAR ENDED JULY 31,                   1999     1998    JULY 31, 1997
- --------------------------------------------------------------------------------
<S>                                         <C>      <C>      <C>
 CLASS D SHARES
- --------------------------------------------------------------------------------
 SELECTED PER SHARE DATA:
- --------------------------------------------------------------------------------
 Net asset value, beginning of period       $        $        $
- --------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss
  Net realized and unrealized gain
                                              ------   ------    ------
 Total income from investment operations
- --------------------------------------------------------------------------------
 Less distributions from
  Net realized gain                                                 -
                                              ------   ------    ------
 Net asset value, end of period             $        $        $
- --------------------------------------------------------------------------------
 TOTAL RETURN                                      %         %         %
- --------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
- --------------------------------------------------------------------------------
 Expenses                                          %         %         %
- --------------------------------------------------------------------------------
 Net investment loss                               %         %         %
- --------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
- --------------------------------------------------------------------------------
 Net assets, end of period, in thousands    $        $        $
- --------------------------------------------------------------------------------
 Portfolio turnover rate                           %         %         %
- --------------------------------------------------------------------------------
</TABLE>

*     The date shares were first issued.

                                                                              23
<PAGE>

MORGAN STANLEY DEAN WITTER
FAMILY OF FUNDS
                           The Morgan Stanley Dean Witter Family of Funds
                           offers investors a wide range of investment choices.
                           Come on in and meet the family!
<TABLE>
<CAPTION>

- ---------------------------------------------------------------------------------------------------------------------
<S>                     <C>                                     <C>
 GROWTH FUNDS            GROWTH FUNDS                            Health Sciences Trust

                         Aggressive Equity Fund                  Information Fund

                         American Opportunities Fund             Natural Resource Development Securities

                         Capital Growth Securities               Precious Metals and Minerals Trust

                         Developing Growth Securities            GLOBAL/INTERNATIONAL FUNDS

                         Equity Fund                             Competitive Edge Fund - "Best Ideas" Portfolio

                         Growth Fund                             European Growth Fund

                         Market Leader Trust                     Fund of Funds - International Portfolio

                         Mid-Cap Equity Trust                    International Fund

                         Small Cap Growth Fund                   International SmallCap Fund

                         Special Value Fund                      Japan Fund

                         Value Fund                              Latin American Growth Fund

                         THEME FUNDS                             Pacific Growth Fund

                         Financial Services Trust
- ---------------------------------------------------------------------------------------------------------------------
 GROWTH & INCOME FUNDS   Balanced Growth Fund                    Strategist Fund

                         Balanced Income Fund                    Total Return Trust

                         Convertible Securities Trust            Value/Added Market Series/Equity Portfolio

                         Dividend Growth Securities              THEME FUNDS

                         Fund of Funds - Domestic Portfolio      Global Utilities Fund

                         Income Builder Fund                     Real Estate Fund

                         Mid-Cap Dividend Growth Securities      Utilities Fund

                         S&P 500 Index Fund                      GLOBAL FUNDS

                         S&P 500 Select Fund                     Global Dividend Growth Securities
- ---------------------------------------------------------------------------------------------------------------------
 INCOME FUNDS            GOVERNMENT INCOME FUNDS                 GLOBAL INCOME FUNDS

                         Federal Securities Trust                North American Government Income Trust

                         Short-Term U.S. Treasury Trust          World Wide Income Trust

                         U.S. Government Securities Trust
                                                                 TAX-FREE INCOME FUNDS
                         DIVERSIFIED INCOME FUNDS
                                                                 California Tax-Free Income Fund
                         Diversified Income Trust
                                                                 Hawaii Municipal Trust(FSC)
                         CORPORATE INCOME FUNDS
                                                                 Limited Term Municipal Trust(NL)
                         High Yield Securities
                                                                 Multi-State Municipal Series Trust(FSC)
                         Intermediate Income Securities
                                                                 New York Tax-Free Income Fund
                         Short-Term Bond Fund(NL)
                                                                 Tax-Exempt Securities Trust
- ---------------------------------------------------------------------------------------------------------------------
 MONEY MARKET FUNDS     TAXABLE MONEY MARKET FUNDS               TAX-FREE MONEY MARKET FUNDS

                        Liquid Asset Fund(MM)                    California Tax-Free Daily Income Trust(MM)

                        U.S. Government Money Market Trust(MM)   New York Municipal Money Market Trust(MM)

                                                                 Tax-Free Daily Income Trust(MM)

</TABLE>

There may be Funds created after this Prospectus was published. Please consult
the inside back cover of a new Fund's prospectus for its designations, e.g.,
Multi-Class Fund or Money Market Fund.

Unless otherwise noted, each listed Morgan Stanley Dean Witter Fund, except for
North American Government Income Trust and Short-Term U.S. Treasury Trust, is a
Multi-Class Fund. A Multi-Class Fund is a mutual fund offering multiple Classes
of shares. The other types of Funds are: NL -- No-Load (Mutual) Fund; MM --
Money Market Fund; FSC -- A mutual fund sold with a front-end sales charge and
a distribution (12b-1) fee.


<PAGE>

MORGAN STANLEY DEAN WITTER
HEALTH SCIENCES TRUST

Additional information about the Fund's investments is available in the Fund's
Annual and Semi-Annual Reports to Shareholders. In the Fund's Annual Report,
you will find a discussion of the market conditions and investment strategies
that significantly affected the Fund's performance during its last fiscal year.
The Fund's Statement of Additional Information also provides additional
information about the Fund. The Statement of Additional Information is
incorporated herein by reference (legally is part of this Prospectus). For a
free copy of any of these documents, to request other information about the
Fund, or to make shareholder inquiries, please call:

                                (800) 869-NEWS

You also may obtain information about the Fund by calling your Morgan Stanley
Dean Witter Financial Advisor or by visiting our Internet site at:

                            www.deanwitter.com/funds

Information about the Fund (including the Statement of Additional Information)
can be viewed and copied at the Securities and Exchange Commission's Public
Reference Room in Washington, DC. Information about the Reference Room's
operations may be obtained by calling the SEC at (800) SEC-0330. Reports and
other information about the Fund are available on the SEC's Internet site
(www.sec.gov), and copies of this information may be obtained, upon payment of
a duplicating fee, by writing the Public Reference Section of the SEC,
Washington, DC 20549-6009.


(side bar)
TICKER SYMBOLS:

 Class A:       HCRAX
- ----------------------
 Class B :      HCRBX
- ----------------------
 Class C:       HCRCX
- ----------------------
 Class D:       HCRDX
- ----------------------
(end side bar)













(THE FUND'S INVESTMENT COMPANY ACT FILE NO. IS 811-6683)

<PAGE>

STATEMENT OF ADDITIONAL INFORMATION                   MORGAN STANLEY DEAN WITTER
                                                      HEALTH SCIENCES TRUST
SEPTEMBER 27, 1999
- --------------------------------------------------------------------------------
     This Statement of Additional Information is not a Prospectus. The
Prospectus (dated September 27, 1999) for the Morgan Stanley Dean Witter Health
Sciences Trust may be obtained without charge from the Fund at its address or
telephone number listed below or from Dean Witter Reynolds at any of its branch
offices.




Morgan Stanley Dean Witter Health Sciences Trust
Two World Trade Center
New York, New York 10048
(800) 869-NEWS














<PAGE>

TABLE OF CONTENTS
- --------------------------------------------------------------------------------

<TABLE>
<S>                                                                         <C>
I.    Fund History ...........................................................4
II.   Description of the Fund and Its Investments and Risks ..................4
        A.  Classification ...................................................4
        B.  Investment Strategies and Risks ..................................4
        C.  Fund Policies/Investment Restrictions ...........................14
III.  Management of the Fund ................................................15
        A.  Board of Trustees ...............................................15
        B.  Management Information ..........................................16
        C.  Compensation ....................................................20
IV.   Control Persons and Principal Holders of Securities ...................22
V.    Investment Management and Other Services ..............................22
        A.  Investment Manager ..............................................23
        B.  Principal Underwriter ...........................................23
        C.  Services Provided by the Investment Manager and Fund Expenses
             Paid by Third Parties ..........................................23
        D.  Dealer Reallowances .............................................24
        E.  Rule 12b-1 Plan .................................................24
        F.  Other Service Providers .........................................28
VI.   Brokerage Allocation and Other Practices ..............................29
        A.  Brokerage Transactions ..........................................29
        B.  Commissions .....................................................29
        C.  Brokerage Selection .............................................30
        D.  Directed Brokerage ..............................................31
        E.  Regular Broker-Dealers ..........................................31
VII.  Capital Stock and Other Securities ....................................31
VIII. Purchase, Redemption and Pricing of Shares ............................32
        A.  Purchase/Redemption of Shares ...................................32
        B.  Offering Price ..................................................32
IX.   Taxation of the Fund and Shareholders .................................33
X.    Underwriters ..........................................................35
XI.   Calculation of Performance Data .......................................35
XII.  Financial Statements ..................................................36
</TABLE>

                                       2
<PAGE>

                      GLOSSARY OF SELECTED DEFINED TERMS

     The terms defined in this glossary are frequently used in this Statement
of Additional Information (other terms used occasionally are defined in the
text of the document).

     "Custodian" -- The Bank of New York.

     "Dean Witter Reynolds" -- Dean Witter Reynolds Inc., a wholly-owned
broker-dealer subsidiary of MSDW.

     "Distributor" -- Morgan Stanley Dean Witter Distributors Inc., a
wholly-owned broker-dealer subsidiary of MSDW.

     "Financial Advisors" -- Morgan Stanley Dean Witter authorized financial
services representatives.

     "Fund" -- Morgan Stanley Dean Witter Health Sciences Trust, a registered
open-end investment company.

     "Investment Manager" -- Morgan Stanley Dean Witter Advisors Inc., a
wholly-owned investment advisor subsidiary of MSDW.

     "Independent Trustees" -- Trustees who are not "interested persons" (as
defined by the Investment Company Act) of the Fund.

     "Morgan Stanley & Co." -- Morgan Stanley & Co. Incorporated, a
wholly-owned broker-dealer subsidiary of MSDW.

     "Morgan Stanley Dean Witter Funds" -- Registered investment companies (i)
for which the Investment Manager serves as the investment advisor and (ii) that
hold themselves out to investors as related companies for investment and
investor services.

     "MSDW" -- Morgan Stanley Dean Witter & Co., a preeminent global financial
services firm.

     "MSDW Services Company" -- Morgan Stanley Dean Witter Services Company
Inc., a wholly-owned fund services subsidiary of the Investment Manager.

     "Transfer Agent" -- Morgan Stanley Dean Witter Trust FSB, a wholly-owned
transfer agent subsidiary of MSDW.

     "Trustees" -- The Board of Trustees of the Fund.








                                       3
<PAGE>

I. FUND HISTORY
- --------------------------------------------------------------------------------
     The Fund was organized as a Massachusetts business trust, under a
Declaration of Trust, on May 26, 1992, with the name Dean Witter Health
Sciences Trust. Effective June 22, 1998, the Fund's name was changed to Morgan
Stanley Dean Witter Health Sciences Trust.


II. DESCRIPTION OF THE FUND AND ITS INVESTMENTS AND RISKS
- --------------------------------------------------------------------------------
A. CLASSIFICATION

     The Fund is an open-end management investment company whose investment
objective is to seek capital appreciation.

     The Fund is a "non-diversified" mutual fund and, as such, its investments
are not required to meet certain diversification requirements under federal
securities law. Compared with "diversified" funds, the Fund may invest a
greater percentage of its assets in the securities of an individual corporation
or governmental entity. Thus, the Fund's assets may be concentrated in fewer
securities than other funds. A decline in the value of those investments would
cause the Fund's overall value to decline to a greater degree. The Fund's
investments, however, are currently diversified and may remain diversified in
the future.

B. INVESTMENT STRATEGIES AND RISKS

     The following discussion of the Fund's investment strategies and risks
should be read with the sections of the Fund's Prospectus titled "Principal
Investment Strategies," "Principal Risks," "Additional Investment Strategy
Information," and "Additional Risk Information."

     FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS. The Fund may enter into
forward foreign currency exchange contracts ("forward contracts") as a hedge
against fluctuations in future foreign exchange rates. The Fund may conduct its
foreign currency exchange transactions either on a spot (i.e., cash) basis at
the spot rate prevailing in the foreign currency exchange market, or through
entering into forward contracts to purchase or sell foreign currencies. A
forward contract involves an obligation to purchase or sell a specific currency
at a future date, which may be any fixed number of days from the date of the
contract agreed upon by the parties, at a price set at the time of the
contract. These contracts are traded in the interbank market conducted directly
between currency traders (usually large, commercial and investment banks) and
their customers. Forward contracts only will be entered into with United States
banks and their foreign branches, insurance companies and other dealers or
foreign banks whose assets total $1 billion or more. A forward contract
generally has no deposit requirement, and no commissions are charged at any
stage for trades.

     The Fund may enter into forward contracts under various circumstances. The
typical use of a forward contract is to "lock in" the price of a security in
U.S. dollars or some other foreign currency which the Fund is holding in its
portfolio. By entering into a forward contract for the purchase or sale, for a
fixed amount of dollars or other currency, of the amount of foreign currency
involved in the underlying security transactions, the Fund may be able to
protect itself against a possible loss resulting from an adverse change in the
relationship between the U.S. dollar or other currency which is being used for
the security purchase and the foreign currency in which the security is
denominated during the period between the date on which the security is
purchased or sold and the date on which payment is made or received.

     The Investment Manager also may from time to time utilize forward
contracts for other purposes. For example, they may be used to hedge a foreign
security held in the portfolio or a security which pays out principal tied to
an exchange rate between the U.S. dollar and a foreign currency, against a
decline in value of the applicable foreign currency. They also may be used to
lock in the current exchange rate of the currency in which those securities
anticipated to be purchased are denominated. At times, the Fund may enter into
"cross-currency" hedging transactions involving currencies other than those in
which securities are held or proposed to be purchased are denominated.


                                       4
<PAGE>

     The Fund will not enter into forward currency contracts or maintain a net
exposure to these contracts where the consummation of the contracts would
obligate the Fund to deliver an amount of foreign currency in excess of the
value of the Fund's portfolio securities.

     Although the Fund values its assets daily in terms of U.S. dollars, it
does not intend to convert its holdings of foreign currencies into U.S. dollars
on a daily basis. It will, however, do so from time to time, and investors
should be aware of the costs of currency conversion. Although foreign exchange
dealers do not charge a fee for conversion, they do realize a profit based on
the spread between the prices at which they are buying and selling various
currencies. Thus, a dealer may offer to sell a foreign currency to the Fund at
one rate, while offering a lesser rate of exchange should the Fund desire to
resell that currency to the dealer.

     The Fund may be limited in its ability to enter into hedging transactions
involving forward contracts by the Internal Revenue Code requirements relating
to qualification as a regulated investment company.

     Forward currency contracts may limit gains on portfolio securities that
could otherwise be realized had they not been utilized and could result in
losses. The contracts also may increase the Fund's volatility and may involve a
significant amount of risk relative to the investment of cash.

     OPTIONS AND FUTURES TRANSACTIONS. The Fund may engage in transactions in
listed and OTC options. Listed options are issued or guaranteed by the exchange
on which they are traded or by a clearing corporation such as the Options
Clearing Corporation ("OCC"). Ownership of a listed call option gives the Fund
the right to buy from the OCC (in the U.S.) or other clearing corporation or
exchange, the underlying security or currency covered by the option at the
stated exercise price (the price per unit of the underlying security) by filing
an exercise notice prior to the expiration date of the option. The writer
(seller) of the option would then have the obligation to sell to the OCC (in
the U.S.) or other clearing corporation or exchange, the underlying security or
currency at that exercise price prior to the expiration date of the option,
regardless of its then current market price. Ownership of a listed put option
would give the Fund the right to sell the underlying security or currency to
the OCC (in the U.S.) or other clearing corporation or exchange, at the stated
exercise price. Upon notice of exercise of the put option, the writer of the
put would have the obligation to purchase the underlying security or currency
from the OCC (in the U.S.) or other clearing corporation or exchange, at the
exercise price.

     Covered Call Writing. The Fund is permitted to write covered call options
on portfolio securities and on the U.S. dollar and foreign currencies in which
they are denominated, without limit.

     The Fund will receive from the purchaser, in return for a call it has
written, a "premium;" i.e., the price of the option. Receipt of these premiums
may better enable the Fund to earn a higher level of current income than it
would earn from holding the underlying securities (or currencies) alone.
Moreover, the premium received will offset a portion of the potential loss
incurred by the Fund if the securities (or currencies) underlying the option
decline in value.

     The Fund may be required, at any time during the option period, to deliver
the underlying security (or currency) against payment of the exercise price on
any calls it has written. This obligation is terminated upon the expiration of
the option period or at such earlier time when the writer effects a closing
purchase transaction. A closing purchase transaction is accomplished by
purchasing an option of the same series as the option previously written.
However, once the Fund has been assigned an exercise notice, the Fund will be
unable to effect a closing purchase transaction.

     A call option is "covered" if the Fund owns the underlying security
subject to the option or has an absolute and immediate right to acquire that
security without additional cash consideration (or for additional consideration
(in cash, Treasury bills or other liquid portfolio securities) held in a
segregated account on the Fund's books) upon conversion or exchange of other
securities held in its portfolio. A call option is also covered if the Fund
holds a call on the same security as the call written where the exercise price
of the call held is (i) equal to or less than the exercise price of the call
written or (ii) greater than the exercise price of the call written if the
difference is maintained by the Fund in cash, Treasury bills or other liquid
portfolio securities in a segregated account on the Fund's books.


                                       5
<PAGE>

     Options written by the Fund normally have expiration dates of from up to
eighteen months from the date written. The exercise price of a call option may
be below, equal to or above the current market value of the underlying security
at the time the option is written.

     Covered Put Writing. A writer of a covered put option incurs an obligation
to buy the security underlying the option from the purchaser of the put, at the
option's exercise price at any time during the option period, at the
purchaser's election. Through the writing of a put option, the Fund would
receive income from the premium paid by purchasers. The potential gain on a
covered put option is limited to the premium received on the option (less the
commissions paid on the transaction). During the option period, the Fund may be
required, at any time, to make payment of the exercise price against delivery
of the underlying security (or currency). The aggregate value of the
obligations underlying puts may not exceed 50% of the Fund's assets. A put
option is "covered" if the Fund maintains cash, Treasury bills or other liquid
portfolio securities with a value equal to the exercise price in a segregated
account on the Fund's books, or holds a put on the same security as the put
written where the exercise price of the put held is equal to or greater than
the exercise price of the put written. The operation of and limitations on
covered put options in other respects are substantially identical to those of
call options.

     Purchasing Call and Put Options. The Fund may purchase listed and OTC call
and put options in amounts equaling up to 5% of its total assets. The purchase
of a call option would enable the Fund, in return for the premium paid to lock
in a purchase price for a security or currency during the term of the option.
The purchase of a put option would enable the Fund, in return for a premium
paid, to lock in a price at which it may sell a security or currency during the
term of the option.

     Options on Foreign Currencies. The Fund may purchase and write options on
foreign currencies for purposes similar to those involved with investing in
forward foreign currency exchange contracts.

     OTC Options. OTC options are purchased from or sold (written) to dealers
or financial institutions which have entered into direct agreements with the
Fund. With OTC options, such variables as expiration date, exercise price and
premium will be agreed upon between the Fund and the transacting dealer,
without the intermediation of a third party such as the OCC. The Fund will
engage in OTC option transactions only with member banks of the Federal Reserve
Bank System or primary dealers in U.S. Government securities or with affiliates
of such banks or dealers.

     Risks of Options Transactions. The successful use of options depends on
the ability of the Investment Manager to forecast correctly interest rates,
currency exchange rates and/or market movements. If the market value of the
portfolio securities (or the currencies in which they are denominated) upon
which call options have been written increases, the Fund may receive a lower
total return from the portion of its portfolio upon which calls have been
written than it would have had such calls not been written. During the option
period, the covered call writer has, in return for the premium on the option,
given up the opportunity for capital appreciation above the exercise price
should the market price of the underlying security (or the value of its
denominated currency) increase, but has retained the risk of loss should the
price of the underlying security (or the value of its denominated currency)
decline. The covered put writer also retains the risk of loss should the market
value of the underlying security decline below the exercise price of the option
less the premium received on the sale of the option. In both cases, the writer
has no control over the time when it may be required to fulfill its obligation
as a writer of the option. Prior to exercise or expiration, an option position
can only be terminated by entering into a closing purchase or sale transaction.
Once an option writer has received an exercise notice, it cannot effect a
closing purchase transaction in order to terminate its obligation under the
option and must deliver or receive the underlying securities at the exercise
price.

     The Fund's ability to close out its position as a writer of an option is
dependent upon the existence of a liquid secondary market on option exchanges.
There is no assurance that such a market will exist, particularly in the case
of OTC options.

     In the event of the bankruptcy of a broker through which the Fund engages
in transactions in options, the Fund could experience delays and/or losses in
liquidating open positions purchased or sold through the broker and/or incur a
loss of all or part of its margin deposits with the broker. In the case of


                                       6
<PAGE>

OTC options, if the transacting dealer fails to make or take delivery of the
securities underlying an option it has written, in accordance with the terms of
that option, due to insolvency or otherwise, the Fund would lose the premium
paid for the option as well as any anticipated benefit of the transaction.

     Each of the exchanges has established limitations governing the maximum
number of call or put options on the same underlying security which may be
written by a single investor, whether acting alone or in concert with others
(regardless of whether such options are written on the same or different
exchanges or are held or written on one or more accounts or through one or more
brokers). An exchange may order the liquidation of positions found to be in
violation of these limits and it may impose other sanctions or restrictions.
These position limits may restrict the number of listed options which the Fund
may write.

     The hours of trading for options may not conform to the hours during which
the underlying securities are traded. To the extent that the option markets
close before the markets for the underlying securities, significant price and
rate movements can take place in the underlying markets that cannot be
reflected in the option markets.

     The markets in foreign currency options are relatively new and the Fund's
ability to establish and close out positions on such options is subject to the
maintenance of a liquid secondary market. There can be no assurance that a
liquid secondary market will exist for a particular option at any specific
time.

     The value of a foreign currency option depends upon the value of the
underlying currency relative to the U.S. dollar. As a result, the price of the
option position may vary with changes in the value of either or both currencies
and have no relationship to the investment merits of a foreign security.
Because foreign currency transactions occurring in the interbank market involve
substantially larger amounts than those that may be involved in the use of
foreign currency options, investors may be disadvantaged by having to deal in
an odd lot market (generally consisting of transactions of less than $1
million) for the underlying foreign currencies at prices that are less
favorable than for round lots.

     There is no systematic reporting of last sale information for foreign
currencies or any regulatory requirement that quotations available through
dealers or other market sources be firm or revised on a timely basis. Quotation
information available is generally representative of very large transactions in
the interbank market and thus may not reflect relatively smaller transactions
(i.e., less than $1 million) where rates may be less favorable. The interbank
market in foreign currencies is a global, around-the-clock market. To the
extent that the U.S. options markets are closed while the markets for the
underlying currencies remain open, significant price and rate movements may
take place in the underlying markets that are not reflected in the options
market.

     Stock Index Options. The Fund may invest in options on broadly based
indexes. Options on stock indexes are similar to options on stock except that,
rather than the right to take or make delivery of stock at a specified price,
an option on a stock index gives the holder the right to receive, upon exercise
of the option, an amount of cash if the closing level of the stock index upon
which the option is based is greater than, in the case of a call, or less than,
in the case of a put, the exercise price of the option. This amount of cash is
equal to such difference between the closing price of the index and the
exercise price of the option expressed in dollars times a specified multiple.
The writer of the option is obligated, in return for the premium received, to
make delivery of this amount.

     Risks of Options on Indexes. Because exercises of stock index options are
settled in cash, the Fund could not, if it wrote a call option, provide in
advance for its potential settlement obligations by acquiring and holding the
underlying securities. A call writer can offset some of the risk of its writing
position by holding a diversified portfolio of stocks similar to those on which
the underlying index is based. However, most investors cannot, as a practical
matter, acquire and hold a portfolio containing exactly the same stocks as the
underlying index, and, as a result, bear a risk that the value of the
securities held will vary from the value of the index. Even if an index call
writer could assemble a stock portfolio that exactly reproduced the composition
of the underlying index, the writer still would not be fully covered from a
risk standpoint because of the "timing risk" inherent in writing index options.


                                       7
<PAGE>

     When an index option is exercised, the amount of cash that the holder is
entitled to receive is determined by the difference between the exercise price
and the closing index level on the date when the option is exercised. As with
other kinds of options, the writer will not learn that it had been assigned
until the next business day, at the earliest. The time lag between exercise and
notice of assignment poses no risk for the writer of a covered call on a
specific underlying security, such as a common stock, because there the
writer's obligation is to deliver the underlying security, not to pay its value
as of a fixed time in the past. So long as the writer already owns the
underlying security, it can satisfy its settlement obligations by simply
delivering it, and the risk that its value may have declined since the exercise
date is borne by the exercising holder. In contrast, even if the writer of an
index call holds stocks that exactly match the composition of the underlying
index, it will not be able to satisfy its assignment obligations by delivering
those stocks against payment of the exercise price. Instead, it will be
required to pay cash in an amount based on the closing index value on the
exercise date; and by the time it learns that it has been assigned, the index
may have declined, with a corresponding decrease in the value of its stock
portfolio. This "timing risk" is an inherent limitation on the ability of index
call writers to cover their risk exposure by holding stock positions.

     A holder of an index option who exercises it before the closing index
value for that day is available runs the risk that the level of the underlying
index may subsequently change. If a change causes the exercised option to fall
out-of-the-money, the exercising holder will be required to pay the difference
between the closing index value and the exercise price of the option (times the
applicable multiplier) to the assigned writer.

     If dissemination of the current level of an underlying index is
interrupted, or if trading is interrupted in stocks accounting for a
substantial portion of the value of an index, the trading of options on that
index will ordinarily be halted. If the trading of options on an underlying
index is halted, an exchange may impose restrictions prohibiting the exercise
of such options.

     Futures Contracts. The Fund may purchase and sell interest rate, currency
and index futures contracts that are traded on U.S. and foreign commodity
exchanges on such underlying securities as U.S. Treasury bonds, notes, bills
and GNMA Certificates and/or any foreign government fixed-income security, on
various currencies and on such indexes of U.S. and foreign securities as may
exist or come into existence.

     A futures contract purchaser incurs an obligation to take delivery of a
specified amount of the obligation underlying the contract at a specified time
in the future for a specified price. A seller of a futures contract incurs an
obligation to deliver the specified amount of the underlying obligation at a
specified time in return for an agreed upon price. The purchase of a futures
contract enables the Fund, during the term of the contract, to lock in a price
at which it may purchase a security or currency and protect against a rise in
prices pending purchase of portfolio securities. The sale of a futures contract
enables the Fund to lock in a price at which it may sell a security or currency
and protect against declines in the value of portfolio securities.

     Although most futures contracts call for actual delivery or acceptance of
securities, the contracts usually are closed out before the settlement date
without the making or taking of delivery. Index futures contracts provide for
the delivery of an amount of cash equal to a specified dollar amount times the
difference between the index value at the open or close of the last trading day
of the contract and the futures contract price. A futures contract sale is
closed out by effecting a futures contract purchase for the same aggregate
amount of the specific type of security (currency) and the same delivery date.
If the sale price exceeds the offsetting purchase price, the seller would be
paid the difference and would realize a gain. If the offsetting purchase price
exceeds the sale price, the seller would pay the difference and would realize a
loss. Similarly, a futures contract purchase is closed out by effecting a
futures contract sale for the same aggregate amount of the specific type of
security (currency) and the same delivery date. If the offsetting sale price
exceeds the purchase price, the purchaser would realize a gain, whereas if the
purchase price exceeds the offsetting sale price, the purchaser would realize a
loss. There is no assurance that the Fund will be able to enter into a closing
transaction.


                                       8
<PAGE>

     Margin. If the Fund enters into a futures contract, it is initially
required to deposit an "initial margin" of cash or U.S. Government securities
or other liquid portfolio securities ranging from approximately 2% to 5% of the
contract amount. Initial margin requirements are established by the exchanges
on which futures contracts trade and may, from time to time, change. In
addition, brokers may establish margin deposit requirements in excess of those
required by the exchanges.

     Initial margin in futures transactions is different from margin in
securities transactions in that initial margin does not involve the borrowing
of funds by a broker's client but is, rather, a good faith deposit on the
futures contract which will be returned to the Fund upon the proper termination
of the futures contract. The margin deposits made are marked to market daily
and the Fund may be required to make subsequent deposits of cash or U.S.
Government securities, called "variation margin," which are reflective of price
fluctuations in the futures contract.

     Options on Futures Contracts. The Fund may purchase and write call and put
options on futures contracts and enter into closing transactions with respect
to such options to terminate an existing position. An option on a futures
contract gives the purchaser the right (in return for the premium paid), and
the writer the obligation, to assume a position in a futures contract (a long
position if the option is a call and a short position if the option is a put)
at a specified exercise price at any time during the term of the option. Upon
exercise of the option, the delivery of the futures position by the writer of
the option to the holder of the option is accompanied by delivery of the
accumulated balance in the writer's futures margin account, which represents
the amount by which the market price of the futures contract at the time of
exercise exceeds, in the case of a call, or is less than, in the case of a put,
the exercise price of the option on the futures contract.

     The writer of an option on a futures contract is required to deposit
initial and variation margin pursuant to requirements similar to those
applicable to futures contracts. Premiums received from the writing of an
option on a futures contract are included in initial margin deposits.

     Limitations on Futures Contracts and Options on Futures. The Fund may not
enter into futures contracts or purchase related options thereon if,
immediately thereafter, the amount committed to margin plus the amount paid for
premiums for unexpired options on futures contracts exceeds 5% of the value of
the Fund's total assets, after taking into account unrealized gains and
unrealized losses on such contracts it has entered into, provided, however,
that in the case of an option that is in-the-money (the exercise price of the
call (put) option is less (more) than the market price of the underlying
security) at the time of purchase, the in-the-money amount may be excluded in
calculating the 5%. However, there is no overall limitation on the percentage
of the Fund's net assets which may be subject to a hedge position.

     Risks of Transactions in Futures Contracts and Related Options. The prices
of securities and indexes subject to futures contracts (and thereby the futures
contract prices) may correlate imperfectly with the behavior of the cash prices
of the Fund's portfolio securities (and the currencies in which they are
denominated). Also, prices of futures contracts may not move in tandem with the
changes in prevailing interest rates, market movements and/or currency exchange
rates against which the Fund seeks a hedge. A correlation may also be distorted
(a) temporarily, by short-term traders' seeking to profit from the difference
between a contract or security price objective and their cost of borrowed
funds; (b) by investors in futures contracts electing to close out their
contracts through offsetting transactions rather than meet margin deposit
requirements; (c) by investors in futures contracts opting to make or take
delivery of underlying securities rather than engage in closing transactions,
thereby reducing liquidity of the futures market; and (d) temporarily, by
speculators who view the deposit requirements in the futures markets as less
onerous than margin requirements in the cash market. Due to the possibility of
price distortion in the futures market and because of the possible imperfect
correlation between movements in the prices of securities and movements in the
prices of futures contracts, a correct forecast of interest rate, currency
exchange rate and/or market movement trends by the Investment Manager may still
not result in a successful hedging transaction.

     There is no assurance that a liquid secondary market will exist for
futures contracts and related options in which the Fund may invest. In the
event a liquid market does not exist, it may not be possible to close out a
futures position and, in the event of adverse price movements, the Fund would
continue to be required to make daily cash payments of variation margin. The
absence of a liquid market in futures contracts might cause the Fund to make or
take delivery of the underlying securities (currencies) at a time when it may
be disadvantageous to do so.


                                       9
<PAGE>

     Exchanges also 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. In the event of adverse price movements, the
Fund would continue to be required to make daily cash payments of variation
margin on open futures positions. In these situations, if the Fund has
insufficient cash, it may have to sell portfolio securities to meet daily
variation margin requirements at a time when it may be disadvantageous to do
so. In addition, the Fund may be required to take or make delivery of the
instruments underlying interest rate futures contracts it holds at a time when
it is disadvantageous to do so. The inability to close out options and futures
positions could also have an adverse impact on the Fund's ability to
effectively hedges its portfolio.

     Futures contracts and options thereon which are purchased or sold on
foreign commodities exchanges may have greater price volatility than their U.S.
counterparts. Furthermore, foreign commodities exchanges may be less regulated
and under less governmental scrutiny than U.S. exchanges. Brokerage
commissions, clearing costs and other transaction costs may be higher on
foreign exchanges. Greater margin requirements may limit the Fund's ability to
enter into certain commodity transactions on foreign exchanges. Moreover,
differences in clearance and delivery requirements on foreign exchanges may
occasion delays in the settlement of the Fund's transactions effected on
foreign exchanges.

     In the event of the bankruptcy of a broker through which the Fund engages
in transactions in futures or options thereon, the Fund could experience delays
and/or losses in liquidating open postions purchased or sold through the broker
and/or incur a loss of all or part of its margin deposits with the broker.

     If the Fund maintains a short position in a futures contract or has sold a
call option in a futures contract, it will cover this position by holding, in a
segregated account maintained on the books of the Fund, cash, U.S. government
securities or other liquid portfolio securities equal in value (when added to
any initial or variation margin on deposit) to the market value of the
securities underlying the futures contract or the exercise price of the option.
Such a position may also be covered by owning the securities underlying the
futures contract (in the case of a stock index futures contract a portfolio of
securities substantially replicating the relevant index), or by holding a call
option permitting the Fund to purchase the same contract at a price no higher
than the price at which the short position was established.

     In addition, if the Fund holds a long position in a futures contract or
has sold a put option on a futures contract, it will hold cash, U.S. government
securities or other liquid portfolio securities equal to the purchase price of
the contract or the exercise price of the put option (less the amount of
initial or variation margin on deposit) in a segregated account maintained on
the books of the Fund. Alternatively, the Fund could cover its long position by
purchasing a put option on the same futures contract with an exercise price as
high or higher than the price of the contract held by the Fund.

     MONEY MARKET SECURITIES. The Fund may invest in various money market
securities for cash management purposes or when assuming a temporary defensive
position, which among others may include commercial paper, bank acceptances,
bank obligations, corporate debt securities, certificates of deposit, U.S.
Government securities, obligations of savings institutions and repurchase
agreements. Such securities are limited to:

     U.S. Government Securities. Obligations issued or guaranteed as to
principal and interest by the United States or its agencies (such as the
Export-Import Bank of the United States, Federal Housing Administration and
Government National Mortgage Association) or its instrumentalities (such as the
Federal Home Loan Bank), including Treasury bills, notes and bonds;

     Bank Obligations. Obligations (including certificates of deposit, time
deposits and bankers' acceptances) of banks subject to regulation by the U.S.
Government and having total assets of $1 billion or more, and instruments
secured by such obligations, not including obligations of foreign branches of
domestic banks except to the extent below;

     Eurodollar Certificates of Deposit. Eurodollar certificates of deposit
issued by foreign branches of domestic banks having total assets of $1 billion
or more;


                                       10
<PAGE>

     Obligations of Savings Institutions. Certificates of deposit of savings
banks and savings and loan associations, having total assets of $1 billion or
more;

     Fully Insured Certificates of Deposit. Certificates of deposit of banks
and savings institutions, having total assets of less than $1 billion, if the
principal amount of the obligation is federally insured by the Bank Insurance
Fund or the Savings Association Insurance Fund (each of which is administered
by the FDIC), limited to $100,000 principal amount per certificate and to 10%
or less of the Fund's total assets in all such obligations and in all illiquid
assets, in the aggregate;

     Commercial Paper. Commercial paper rated within the two highest grades by
Standard & Poor's Corporation ("S&P") or the two highest grade by Moody's
Investors Service, Inc. ("Moody's") or, if not rated, issued by a company
having an outstanding debt issue rated at least AA by S&P or Aa by Moody's; and


     Repurchase Agreements. The Fund may invest in repurchase agreements. When
cash may be available for only a few days, it may be invested by the Fund in
repurchase agreements until such time as it may otherwise be invested or used
for payments of obligations of the Fund. These agreements, which may be viewed
as a type of secured lending by the Fund, typically involve the acquisition by
the Fund of debt securities from a selling financial institution such as a
bank, savings and loan association or broker-dealer. The agreement provides
that the Fund will sell back to the institution, and that the institution will
repurchase, the underlying security serving as collateral at a specified price
and at a fixed time in the future, usually not more than seven days from the
date of purchase. The collateral will be marked-to-market daily to determine
that the value of the collateral, as specified in the agreement, does not
decrease below the purchase price plus accrued interest. If such decrease
occurs, additional collateral will be requested and, when received, added to
the account to maintain full collateralization. The Fund will accrue interest
from the institution until the time when the repurchase is to occur. Although
this date is deemed by the Fund to be the maturity date of a repurchase
agreement, the maturities of securities subject to repurchase agreements are
not subject to any limits.

     While repurchase agreements involve certain risks not associated with
direct investments in debt securities, the Fund follows procedures designed to
minimize such risks. These procedures include effecting repurchase transactions
only with large, well-capitalized and well-established financial institutions
whose financial condition will be continually monitored by the Investment
Manager subject to procedures established by the Trustees. In addition, as
described above, the value of the collateral underlying the repurchase
agreement will be at least equal to the repurchase price, including any accrued
interest earned on the repurchase agreement. In the event of a default or
bankruptcy by a selling financial institution, the Fund will seek to liquidate
such collateral. However, the exercising of the Fund's right to liquidate such
collateral could involve certain costs or delays and, to the extent that
proceeds from any sale upon a default of the obligation to repurchase were less
than the repurchase price, the Fund could suffer a loss.

     REVERSE REPURCHASE AGREEMENTS. The Fund may also use reverse repurchase
agreements. 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. These 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. Opportunities to achieve this
advantage may not always be available, and the Fund intends to use the reverse
repurchase technique only when it will be to its advantage to do so.

     The Fund will establish a segregated account in which it will maintain
cash, U.S. Government securities or other liquid portfolio securities equal in
value to its obligations in respect of reverse repurchase agreements. Reverse
repurchase agreements 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 files for bankruptcy or becomes insolvent, the Fund's use
of proceeds of the agreement may be restricted pending a


                                       11
<PAGE>

determination by the other party, or its trustee or receiver, whether to
enforce the Fund's obligation to repurchase the securities. Reverse repurchase
agreements are speculative techniques involving leverage, and are considered
borrowings by the Fund.

     CONVERTIBLE SECURITIES. The Fund may invest in fixed-income securities
which are convertible into common stock. Convertible securities rank senior to
common stocks in a corporation's capital structure and, therefore, entail less
risk than the corporation's common stock. The value of a convertible security
is a function of its "investment value" (its value as if it did not have a
conversion privilege), and its "conversion value" (the security's worth if it
were to be exchanged for the underlying security, at market value, pursuant to
its conversion privilege).

     To the extent that a convertible security's investment value is greater
than its conversion value, its price will be primarily a reflection of such
investment value and its price will be likely to increase when interest rates
fall and decrease when interest rates rise, as with a fixed-income security
(the credit standing of the issuer and other factors may also have an effect on
the convertible security's value). If the conversion value exceeds the
investment value, the price of the convertible security will rise above its
investment value and, in addition, will sell at some premium over its
conversion value. (This premium represents the price investors are willing to
pay for the privilege of purchasing a fixed-income security with a possibility
of capital appreciation due to the conversion privilege.) At such times the
price of the convertible security will tend to fluctuate directly with the
price of the underlying equity security. Convertible securities may be
purchased by the Fund at varying price levels above their investment values
and/or their conversion values in keeping with the Fund's objective.

     ZERO COUPON SECURITIES. A portion of the U.S. government securities
purchased by the Fund may be zero coupon securities. Such securities are
purchased at a discount from their face amount, giving the purchaser the right
to receive their full value at maturity. The interest earned on such securities
is, implicitly, automatically compounded and paid out at maturity. While such
compounding at a constant rate eliminates the risk of receiving lower yields
upon reinvestment of interest if prevailing interest rates decline, the owner
of a zero coupon security will be unable to participate in higher yields upon
reinvestment of interest received on interest-paying securities if prevailing
interest rates rise.

     A zero coupon security pays no interest to its holder during its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will
not receive current cash available for distribution to shareholders. In
addition, zero coupon securities are subject to substantially greater price
fluctuations during periods of changing prevailing interest rates than are
comparable securities which pay interest on a current basis. Current federal
tax law requires that a holder (such as the Fund) of a zero coupon security
accrue a portion of the discount at which the security was purchased as income
each year even though the Fund receives no interest payments in cash on the
security during the year.

     LENDING PORTFOLIO SECURITIES. The Fund may lend its portfolio securities
to brokers, dealers and other financial institutions, provided that the loans
are callable at any time by the Fund, and are at all times secured by cash or
cash equivalents, which are maintained in a segregated account pursuant to
applicable regulations and that are equal to at least 100% of the market value,
determined daily, of the loaned securities. The advantage of these loans is
that the Fund continues to receive the income on the loaned securities while at
the same time earning interest on the cash amounts deposited as collateral,
which will be invested in short-term obligations. The Fund will not lend more
than 25% of the value of its total assets.

     As with any extensions of credit, there are risks of delay in recovery
and, in some cases, even loss of rights in the collateral should the borrower
of the securities fail financially. However, these loans of portfolio
securities will only be made to firms deemed by the Fund's management to be
creditworthy and when the income which can be earned from such loans justifies
the attendant risks. Upon termination of the loan, the borrower is required to
return the securities to the Fund. Any gain or loss in the market price during
the loan period would inure to the Fund.

     When voting or consent rights which accompany loaned securities pass to
the borrower, the Fund will follow the policy of calling the loaned securities,
to be delivered within one day after notice, to permit the exercise of the
rights if the matters involved would have a material effect on the Fund's
investment in the loaned securities. The Fund will pay reasonable finder's,
administrative and custodial fees in connection with a loan of its securities.


                                       12
<PAGE>

     WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS. From
time to time the Fund may purchase securities on a when-issued or delayed
delivery basis or may purchase or sell securities on a forward commitment
basis. When these transactions are negotiated, the price is fixed at the time
of the commitment, but delivery and payment can take place a month or more
after the date of commitment. While the Fund will only purchase securities on a
when-issued, delayed delivery or forward commitment basis with the intention of
acquiring the securities, the Fund may sell the securities before the
settlement date, if it is deemed advisable. The securities so purchased or sold
are subject to market fluctuation and no interest or dividends accrue to the
purchaser prior to the settlement date.

     At the time the Fund makes the commitment to purchase or sell securities
on a when-issued, delayed delivery or forward commitment basis, it will record
the transaction and thereafter reflect the value, each day, of such security
purchased, or if a sale, the proceeds to be received, in determining its net
asset value. At the time of delivery of the securities, their value may be more
or less than the purchase or sale price. An increase in the percentage of the
Fund's assets committed to the purchase of securities on a when-issued, delayed
delivery or forward commitment basis may increase the volatility of its net
asset value. The Fund will also establish a segregated account on the Fund's
books in which it will continually maintain cash or cash equivalents or other
liquid portfolio securities equal in value to commitments to purchase
securities on a when-issued, delayed delivery or forward commitment basis.

     WHEN, AS AND IF ISSUED SECURITIES. The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization or debt restructuring. The commitment for the purchase
of any such security will not be recognized in the portfolio of the Fund until
the Investment Manager determines that issuance of the security is probable. At
that time, the Fund will record the transaction and, in determining its net
asset value, will reflect the value of the security daily. At that time, the
Fund will also establish a segregated account on the Fund's books in which it
will maintain cash or cash equivalents or other liquid portfolio securities
equal in value to recognized commitments for such securities.

     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 the security will
result automatically from the exchange or conversion of a security owned by the
Fund at the time of sale.

     PRIVATE PLACEMENTS. The Fund may invest up to 15% of its net assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933 (the "Securities Act"), or
which are otherwise not readily marketable. (Securities eligible for resale
pursuant to Rule 144A under the Securities Act, and determined to be liquid
pursuant to the procedures discussed in the following paragraph, are not
subject to the foregoing restriction.) These securities are generally referred
to as private placements or restricted securities. Limitations on the resale of
these 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 the securities for resale and the
risk of substantial delays in effecting the registration.

     Rule 144A permits the Fund to sell restricted securities to qualified
institutional buyers without limitation. The Investment Manager, pursuant to
procedures adopted by the Trustees, 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," the security will not be included within
the category "illiquid securities," which may not exceed 15% of the Fund's net
assets. However, investing in Rule 144A securities could have the effect of
increasing the level of Fund illiquidity to the extent the Fund, at a
particular point in time, may be unable to find qualified institutional buyers
interested in purchasing such securities.

     WARRANTS AND SUBSCRIPTION RIGHTS. Subject to the Fund's investment
restrictions, the Fund may acquire warrants. A warrant is, in effect, an option
to purchase equity securities at a specific price, generally valid for a
specific period of time, and has no voting rights, pays no dividends and has no
rights with respect to the corporation issuing it.


                                       13
<PAGE>

     A subscription right is a privilege granted to existing shareholders of a
corporation to subscribe to shares of a new issue of common stock before it is
offered to the public. A subscription right normally has a life of two to four
weeks and a subscription price lower than the current market value of the
common stock. A subscription right is freely transferable.

     YEAR 2000. The investment management services provided to the Fund by the
Investment Manager and the services provided to shareholders by the Distributor
and the Transfer Agent depend on the smooth functioning of their computer
systems. Many computer software systems in use today cannot recognize the year
2000, but revert to 1900 or some other date, due to the manner in which dates
were encoded and calculated. That failure could have a negative impact on the
handling of securities trades, pricing and account services. The Investment
Manager, the Distributor and the Transfer Agent have been actively working on
necessary changes to their own computer systems to prepare for the year 2000
and expect that their systems will be adapted before that date, but there can
be no assurance that they will be successful, or that interaction with other
non-complying computer systems will not impair their services at that time.

     In addition, it is possible that the markets for securities in which the
Fund invests may be detrimentally affected by computer failures throughout the
financial services industry beginning January 1, 2000. Improperly functioning
trading systems may result in settlement problems and liquidity issues.
Corporate and governmental data processing errors also may result in production
problems for individual companies and overall economic uncertainties. Earnings
of individual issuers will be affected by remediation costs, which may be
substantial and may be reported inconsistently in U.S. and foreign financial
statements. Accordingly, the Fund's investments may be adversely affected.

C. FUND POLICIES/INVESTMENT RESTRICTIONS

     The investment objective, policies and restrictions listed below have been
adopted by the Fund as fundamental policies. Under the Investment Company Act
of 1940 (the "Investment Company Act"), a fundamental policy may not be changed
without the vote of a majority of the outstanding voting securities of the
Fund. The Investment Company Act defines a majority as the lesser of (a) 67% or
more of the shares present at a meeting of shareholders, if the holders of 50%
of the outstanding shares of the Fund are present or represented by proxy; or
(b) more than 50% of the outstanding shares of the Fund. For purposes of the
following restrictions: (i) all percentage limitations apply immediately after
a purchase or initial investment; and (ii) any subsequent change in any
applicable percentage resulting from market fluctuations or other changes in
total or net assets does not require elimination of any security from the
portfolio.

     The Fund will:

     1.  Seek capital appreciation.

     The Fund may not:

     1.  Invest 25% or more of the value of its total assets in securities of
         issuers in any one industry, except the Fund will invest at least 25%
         of the value of its total assets in the health sciences industry.

     2.  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. The restriction shall not apply to any
         obligation issued or guaranteed by the United States Government, its
         agencies or instrumentalities.

     3.  Purchase or sell commodities or commodities contracts, except the Fund
         may purchase or write (sell) interest rate, currency and stock and bond
         index futures contracts and related options thereon.

     4.  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 the writing of options and collateral
         arrangements with respect to initial or variation margin for futures
         are not deemed to be pledges of assets.)


                                       14
<PAGE>

     5.  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.

     6.  Purchase or sell real estate or interests therein, although the Fund
         may purchase securities of issuers which engage in real estate
         operations and securities secured by real estate or interests therein.

     7.  Purchase oil, gas or other mineral leases, rights or royalty contracts
         or exploration or development programs, except that the Fund may invest
         in the securities of companies which operate, invest in, or sponsor
         such programs.

     8.  Purchase securities of other investment companies, except in connection
         with a merger, consolidation, reorganization or acquisition of assets
         or, in the case of a closed-end company, in accordance with the
         provisions of Section 12(d) of the Act and any Rules promulgated
         thereunder.

     9.  Borrow money (except insofar as the Fund may be deemed to have borrowed
         by entrance into a reverse repurchase agreement up to an amount not
         exceeding 10% of the Fund's total assets), except that the Fund may
         borrow from a bank for temporary or emergency purposes in amounts not
         exceeding 5% (taken at the lower of cost or current value) of its total
         assets (not including the amount borrowed).

     10. Issue senior securities as defined in the Act except insofar as the
         Fund may be deemed to have issued a senior security by reason of: (a)
         entering into any repurchase or reverse repurchase agreement; (b)
         purchasing any securities on a when-issued or delayed delivery basis;
         (c) purchasing or selling futures contracts, forward foreign exchange
         contracts or options; (d) borrowing money in accordance with
         restrictions described above; or (e) lending portfolio securities.

     11. Make loans of money or securities, except by: (a) the purchase of
         publicly distributed debt obligations; (b) investment in repurchase or
         reverse repurchase agreements; or (c) lending its portfolio securities.

     12. Make short sales of securities or maintain a short position, unless at
         all times when a short position is open it either owns an equal amount
         of such securities or owns securities which, without payment of any
         further consideration, are convertible into or exchangeable for
         securities of the same issue as, and equal in amount to, the securities
         sold short.

     13. Engage in the underwriting of securities, except insofar as the Fund
         may be deemed an underwriter under the Securities Act of 1933 in
         disposing of a portfolio security.

     14. Invest for the purpose of exercising control or management of any other
         issuer.

     15. Invest more than 5% of its net assets in warrants, including not more
         than 2% of such net assets in warrants not listed on either a
         recognized domestic or foreign exchange. However, the acquisition of
         warrants attached to other securities is not subject to this
         restriction.

     Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.


III. MANAGEMENT OF THE FUND
- --------------------------------------------------------------------------------
A. BOARD OF TRUSTEES

     The Board of Trustees of the Fund oversees the management of the Fund but
does not itself manage the Fund. The Trustees review various services provided
by or under the direction of the Investment Manager to ensure that the Fund's
general investment policies and programs are properly carried out. The Trustees
also conduct their review to ensure that administrative services are provided
to the Fund in a satisfactory manner.


                                       15
<PAGE>

     Under state law, the duties of the Trustees are generally characterized as
a duty of loyalty and a duty of care. The duty of loyalty requires a Trustee to
exercise his or her powers in the interest of the Fund and not the Trustee's
own interest or the interest of another person or organization. A Trustee
satisfies his or her duty of care by acting in good faith with the care of an
ordinarily prudent person and in a manner the Trustee reasonably believes to be
in the best interest of the Fund and its shareholders.

B. MANAGEMENT INFORMATION

     TRUSTEES AND OFFICERS. The Board of the Fund consists of eight (8)
Trustees. These same individuals also serve as directors or trustees for all of
the Morgan Stanley Dean Witter Funds. Six Trustees (75% of the total number)
have no affiliation or business connection with the Investment Manager or any
of its affiliated persons and do not own any stock or other securities issued
by the Investment Manager's parent company, MSDW. These are the
"non-interested" or "independent" Trustees. The other two Trustees (the
"management Trustees") are affiliated with the Investment Manager. All of the
Trustees also serve as Trustees of "Discover Brokerage Index Series," a mutual
fund for which the Investment Manager is the investment advisor.

     The Trustees and executive officers of the Fund, their principal business
occupations during the last five years and their affiliations, if any, with the
Investment Manager, and with the 90 Morgan Stanley Dean Witter Funds and
Discover Brokerage Index Series, are shown below.


<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS        PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -------------------------------------------   ---------------------------------------------------
<S>                                           <C>
Michael Bozic (58) ........................   Vice Chairman of Kmart Corporation (since
Trustee                                       December, 1998); Director or Trustee of the Morgan
c/o Kmart Corporation                         Stanley Dean Witter Funds and Discover Brokerage
3100 West Big Beaver Road                     Index Series; formerly Chairman and Chief
Troy, Michigan                                Executive Officer of Levitz Furniture Corporation
                                              (November, 1995-November, 1998) and President
                                              and Chief Executive Officer of Hills Department
                                              Stores (May, 1991-July, 1995); formerly variously
                                              Chairman, Chief Executive Officer, President and
                                              Chief Operating Officer (1987-1991) of the Sears
                                              Merchandise Group of Sears, Roebuck and Co.;
                                              Director of Eaglemark Financial Services, Inc. and
                                              Weirton Steel Corporation.

Charles A. Fiumefreddo* (66) ..............   Chairman, Director or Trustee and Chief Executive
Chairman of the Board,                        Officer of the Morgan Stanley Dean Witter Funds
Chief Executive Officer and Trustee           and Discover Brokerage Index Series; formerly
Two World Trade Center                        Chairman, Chief Executive Officer and Director of
New York, New York                            the Investment Manager, the Distributor and MSDW
                                              Services Company; Executive Vice President and
                                              Director of Dean Witter Reynolds; Chairman and
                                              Director of the Transfer Agent; formerly Director
                                              and/or officer of various MSDW subsidiaries (until
                                              June 1998).
</TABLE>














                                       16
<PAGE>


<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS          PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -------------------------------------------   --------------------------------------------------------
<S>                                           <C>
Edwin J. Garn (66) ........................   Director or Trustee of the Morgan Stanley Dean
Trustee                                       Witter Funds and Discover Brokerage Index Series;
c/o Huntsman Corporation                      formerly United States Senator (R-Utah)
500 Huntsman Way                              (1974-1992) and Chairman, Senate Banking
Salt Lake City, Utah                          Committee (1980-1986); formerly Mayor of Salt
                                              Lake City, Utah (1971-1974); formerly Astronaut,
                                              Space Shuttle Discovery (April 12-19, 1985); Vice
                                              Chairman, Huntsman Corporation (chemical
                                              company); Director of Franklin Covey (time
                                              management systems), BMW Bank of North
                                              America, Inc. (industrial loan corporation), United
                                              Space Alliance (joint venture between Lockheed
                                              Martin and the Boeing Company) and Nuskin Asia
                                              Pacific (multilevel marketing); member of the board
                                              of various civic and charitable organizations.

Wayne E. Hedien (65) ......................   Retired; Director or Trustee of the Morgan Stanley
Trustee                                       Dean Witter Funds and Discover Brokerage Index
c/o Mayer, Brown & Platt                      Series; Director of The PMI Group, Inc. (private
Counsel to the Independent Trustees           mortgage insurance); Trustee and Vice Chairman of
1675 Broadway                                 The Field Museum of Natural History; formerly
New York, New York                            associated with the Allstate Companies (1966-1994),
                                              most recently as Chairman of The Allstate Corporation
                                              (March, 1993-December, 1994) and Chairman and
                                              Chief Executive Officer of its wholly-owned subsidiary,
                                              Allstate Insurance Company (July, 1989-December,
                                              1994); director of various other business and
                                              charitable organizations.

Dr. Manuel H. Johnson (50) ................   Senior Partner, Johnson Smick International, Inc.,
Trustee                                       a consulting firm; Co-Chairman and a founder of
c/o Johnson Smick International, Inc.         the Group of Seven Council (G7C), an international
1133 Connecticut Avenue, N.W.                 economic commission; Chairman of the Audit
Washington, D.C.                              Committee and Director or Trustee of the Morgan
                                              Stanley Dean Witter Funds and Discover Brokerage
                                              Index Series; Director of Greenwich Capital
                                              Markets, Inc. (broker-dealer) and NVR, Inc. (home
                                              construction); Chairman and Trustee of the
                                              Financial Accounting Foundation (oversight
                                              organization of the Financial Accounting Standards
                                              Board); formerly Vice Chairman of the Board of
                                              Governors of the Federal Reserve System
                                              (1986-1990) and Assistant Secretary of the U.S.
                                              Treasury.

Michael E. Nugent (63) ....................   General Partner, Triumph Capital, L.P., a private
Trustee                                       investment partnership; Chairman of the Insurance
c/o Triumph Capital, L.P.                     Committee and Director or Trustee of the Morgan
237 Park Avenue                               Stanley Dean Witter Funds and Discover Brokerage
New York, New York                            Index Series; formerly Vice President, Bankers Trust
                                              Company and BT Capital Corporation (1984-1988);
                                              director of various business organizations.
</TABLE>



                                       17
<PAGE>


<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -------------------------------------------   ------------------------------------------------------
<S>                                           <C>
Philip J. Purcell* (56) ...................   Chairman of the Board of Directors and Chief
Trustee                                       Executive Officer of MSDW, Dean Witter Reynolds
1585 Broadway                                 and Novus Credit Services Inc.; Director of the
New York, New York                            Distributor; Director or Trustee of the Morgan
                                              Stanley Dean Witter Funds and Discover Brokerage
                                              Index Series; Director and/or officer of various
                                              MSDW subsidiaries.

John L. Schroeder (66) ....................   Retired; Chairman of the Derivatives Committee
Trustee                                       and Director or Trustee of the Morgan Stanley
c/o Mayer, Brown & Platt                      Dean Witter Funds and Discover Brokerage Index
Counsel to the Independent Trustees           Series; Director of Citizens Utilities Company
1675 Broadway                                 (telecommunications, gas, electric and water
New York, New York                            utilities company); formerly Executive Vice
                                              President and Chief Investment Officer of the
                                              Home Insurance Company (August, 1991-
                                              September, 1995).

Mitchell M. Merin (46) ....................   President and Chief Operating Officer of Asset
President                                     Management of MSDW (since December, 1998);
Two World Trade Center                        President and Director (since April, 1997) and
New York, New York                            Chief Executive Officer (since June, 1998) of the
                                              Investment Manager and MSDW Services
                                              Company; Chairman, Chief Executive Officer and
                                              Director of the Distributor (since June, 1998);
                                              Chairman and Chief Executive Officer (since June,
                                              1998) and Director (since January, 1998) of the
                                              Transfer Agent; Director of various MSDW
                                              subsidiaries; President of the Morgan Stanley Dean
                                              Witter Funds and Discover Brokerage Index Series
                                              (since May, 1999); previously Chief Strategic Officer
                                              of the Investment Manager and MSDW Services
                                              Company and Executive Vice President of the
                                              Distributor (April, 1997-June, 1998), Vice President
                                              of the Morgan Stanely Dean Witter Funds and
                                              Discover Brokerage Index Series (May, 1997-April,
                                              1999), and Executive Vice President of Dean
                                              Witter, Discover & Co.

Barry Fink (44) ...........................   Senior Vice President (since March, 1997) and
Vice President, Secretary                     Secretary and General Counsel (since February,
and General Counsel                           1997) and Director (since July, 1998) of the
Two World Trade Center                        Investment Manager and MSDW Services
New York, New York                            Company; Senior Vice President (since March,
                                              1997) and Assistant Secretary and Assistant
                                              General Counsel (since February, 1997) of the
                                              Distributor; Assistant Secretary of Dean Witter
                                              Reynolds (since August, 1996); Vice President,
                                              Secretary and General Counsel of the Morgan
                                              Stanley Dean Witter Funds (since February, 1997);
                                              Vice President, Secretary and General Counsel of
                                              Discover Brokerage Index Series; previously First
                                              Vice President (June, 1993-February, 1997), Vice
                                              President and Assistant Secretary and Assistant
                                              General Counsel of the Investment Manager and
                                              MSDW Services Company and Assistant Secretary
                                              of the Morgan Stanley Dean Witter Funds.
</TABLE>

                                       18
<PAGE>


<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS        PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- -------------------------------------------   ----------------------------------------------------
<S>                                           <C>
Teresa McRoberts (41) .....................   Vice President of the Investment Manager (since
Vice President                                June, 1998); formerly Senior Analyst at Fred Alger
Two World Trade Center                        Management (July, 1994-May, 1998).
New York, New York

Thomas F. Caloia (53) .....................   First Vice President and Assistant Treasurer of the
Treasurer                                     Investment Manager, the Distributor and MSDW
Two World Trade Center                        Services Company; Treasurer of the Morgan
New York, New York                            Stanley Dean Witter Funds and Discover Brokerage
                                              Index Series.
</TABLE>

- ----------
* Denotes Trustees who are "interested persons" of the Fund as defined by the
  Investment Company Act.

     In addition, Ronald E. Robison, Executive Vice President, Chief
Administrative Officer and Director of the Investment Manager and MSDW Services
Company, Robert S. Giambrone, Senior Vice President of the Investment Manager,
MSDW Services Company, the Distributor and the Transfer Agent and Director of
the Transfer Agent, and Joseph J. McAlinden, Executive Vice President and Chief
Investment Officer of the Investment Manager and Director of the Transfer
Agent, and Kenton J. Hinchliffe, Ira N. Ross and Paul D. Vance, Senior Vice
Presidents of the Investment Manager, are Vice Presidents of the Fund.

     In addition, Frank Bruttomesso, Marilyn K. Cranney, Lou Anne D. McInnis,
Carsten Otto and Ruth Rossi, First Vice Presidents and Assistant General
Counsels of the Investment Manager and MSDW Services Company, Todd Lebo, Vice
President and Assistant General Counsel of the Investment Manager and MSDW
Services Company and Natasha Kassian, a Staff Attorney with the Investment
Manager, are Assistant Secretaries of the Fund.

     INDEPENDENT DIRECTORS/TRUSTEES AND THE COMMITTEES. Law and regulation
establish both general guidelines and specific duties for the independent
directors/trustees. The Morgan Stanley Dean Witter Funds seek as independent
directors/trustees individuals of distinction and experience in business and
finance, government service or academia; these are people whose advice and
counsel are in demand by others and for whom there is often competition. To
accept a position on the Funds' boards, such individuals may reject other
attractive assignments because the Funds make substantial demands on their
time. All of the independent directors/trustees serve as members of the Audit
Committee. In addition, three of the directors/trustees, including two
independent directors/trustees, serve as members of the Derivatives Committee
and the Insurance Committee.

     The independent directors/trustees are charged with recommending to the
full board approval of management, advisory and administration contracts, Rule
12b-1 plans and distribution and underwriting agreements; continually reviewing
Fund performance; checking on the pricing of portfolio securities, brokerage
commissions, transfer agent costs and performance, and trading among Funds in
the same complex; and approving fidelity bond and related insurance coverage
and allocations, as well as other matters that arise from time to time. The
independent directors/trustees are required to select and nominate individuals
to fill any independent director/trustee vacancy on the board of any Fund that
has a Rule 12b-1 plan of distribution. Most of the Morgan Stanley Dean Witter
Funds have a Rule 12b-1 plan.

     The Audit Committee is charged with recommending to the full board the
engagement or discharge of the Fund's independent accountants; directing
investigations into matters within the scope of the independent accountants'
duties, including the power to retain outside specialists; reviewing with the
independent accountants the audit plan and results of the auditing engagement;
approving professional services provided by the independent accountants and
other accounting firms prior to the performance of the services; reviewing the
independence of the independent accountants; considering the range of audit and
non-audit fees; reviewing the adequacy of the Fund's system of internal
controls; and preparing and submitting Committee meeting minutes to the full
board.


                                       19
<PAGE>

     The board of each Fund has a Derivatives Committee to approve parameters
for and monitor the activities of the Fund with respect to derivative
investments, if any, made by the Fund.

     Finally, the board of each Fund has formed an Insurance Committee to
review and monitor the insurance coverage maintained by the Fund.

     ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT DIRECTORS/TRUSTEES
FOR ALL MORGAN STANLEY DEAN WITTER FUNDS. The independent directors/trustees
and the Funds' management believe that having the same independent
directors/trustees for each of the Morgan Stanley Dean Witter Funds avoids the
duplication of effort that would arise from having different groups of
individuals serving as independent directors/trustees for each of the Funds or
even of sub-groups of Funds. They believe that having the same individuals
serve as independent directors/trustees of all the Funds tends to increase
their knowledge and expertise regarding matters which affect the Fund complex
generally and enhances their ability to negotiate on behalf of each Fund with
the Fund's service providers. This arrangement also precludes the possibility
of separate groups of independent directors/trustees arriving at conflicting
decisions regarding operations and management of the Funds and avoids the cost
and confusion that would likely ensue. Finally, having the same independent
directors/trustees serve on all Fund boards enhances the ability of each Fund
to obtain, at modest cost to each separate Fund, the services of independent
directors/trustees, of the caliber, experience and business acumen of the
individuals who serve as independent directors/trustees of the Morgan Stanley
Dean Witter Funds.

     TRUSTEE AND OFFICER INDEMNIFICATION. The Fund's Declaration of Trust
provides that no Trustee, officer, employee or agent of the Fund is liable to
the Fund or to a shareholder, nor is any Trustee, officer, employee or agent
liable to any third persons in connection with the affairs of the Fund, except
as such liability may arise from his/her or its own bad faith, willful
misfeasance, gross negligence or reckless disregard of his/her or its duties.
It also provides that all third persons shall look solely to the Fund property
for satisfaction of claims arising in connection with the affairs of the Fund.
With the exceptions stated, the Declaration of Trust provides that a Trustee,
officer, employee or agent is entitled to be indemnified against all liability
in connection with the affairs of the Fund.

C. COMPENSATION

     The Fund pays each Independent Trustee an annual fee of $800 plus a per
meeting fee of $50 for meetings of the Board of Trustees, the Independent
Trustees or Committees of the Board of Trustees attended by the Trustee (the
Fund pays the Chairman of the Audit Committee an additional annual fee of $750
and the Chairmen of the Derivatives and Insurance Committees additional annual
fees of $500). If a Board meeting and a meeting of the Independent Trustees or
a Committee meeting, or a meeting of the Independent Trustees and/or more than
one Committee meeting, take place on a single day, the Trustees are paid a
single meeting fee by the Fund. The Fund also reimburses such Trustees for
travel and other out-of-pocket expenses incurred by them in connection with
attending such meetings. Trustees and officers of the Fund who are or have been
employed by the Investment Manager or an affiliated company receive no
compensation or expense reimbursement from the Fund for their services as
Trustee.

     The following table illustrates the compensation that the Fund paid to its
Independent Trustees for the fiscal year ended July 31, 1999.

                               FUND COMPENSATION


<TABLE>
<CAPTION>
                                     AGGREGATE
                                   COMPENSATION
NAME OF INDEPENDENT TRUSTEE        FROM THE FUND
- -------------------------------   --------------
<S>                               <C>
Michael Bozic .................   $
Edwin J. Garn .................
Wayne E. Hedien ...............
Dr. Manuel H. Johnson .........
Michael E. Nugent .............
John L. Schroeder .............
</TABLE>


                                       20
<PAGE>

     The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1998 for services
to the 90 Morgan Stanley Dean Witter Funds that were in operation at December
31, 1998. No compensation was paid to the Fund's Independent Trustees by
Discover Brokerage Index Series for the calendar year ended December 31, 1998.


            CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS




<TABLE>
<CAPTION>
                                     TOTAL CASH
                                    COMPENSATION
                                 FOR SERVICES TO 90
                                   MORGAN STANLEY
                                    DEAN WITTER
NAME OF INDEPENDENT TRUSTEE            FUNDS
- ------------------------------- -------------------
<S>                             <C>
Michael Bozic .................       $120,150
Edwin J. Garn .................        132,450
Wayne E. Hedien ...............        132,350
Dr. Manuel H. Johnson .........        155,681
Michael E. Nugent .............        159,731
John L. Schroeder .............        160,731
</TABLE>

     As of the date of this Statement of Additional Information, 55 of the
Morgan Stanley Dean Witter Funds, including the Fund, have adopted a retirement
program under which an independent director/  trustee who retires after serving
for at least five years (or such lesser period as may be determined by the
Board) as an independent director/trustee of any Morgan Stanley Dean Witter
Fund that has adopted the retirement program (each such Fund referred to as an
"Adopting Fund" and each such director/  trustee referred to as an "Eligible
Trustee") is entitled to retirement payments upon reaching the eligible
retirement age (normally, after attaining age 72). Annual payments are based
upon length of service.

     Currently, upon retirement, each Eligible Trustee is entitled to receive
from the Adopting Fund, commencing as of his or her retirement date and
continuing for the remainder of his or her life, an annual retirement benefit
(the "Regular Benefit") equal to 30.22% of his or her Eligible Compensation
plus 0.5036667% of such Eligible Compensation for each full month of service as
an independent director/ trustee of any Adopting Fund in excess of five years
up to a maximum of 60.44% after ten years of service. The foregoing percentages
may be changed by the Board.(1) "Eligible Compensation" is one-fifth of the
total compensation earned by such Eligible Trustee for service to the Adopting
Fund in the five year period prior to the date of the Eligible Trustee's
retirement. Benefits under the retirement program are accrued as expenses on
the books of the Adopting Funds. Such benefits are not secured or funded by the
Adopting Funds.

- ----------
(1)   An Eligible Trustee may elect alternative payments of his or her
      retirement benefits based upon the combined life expectancy of the
      Eligible Trustee and his or her spouse on the date of such Eligible
      Trustee's retirement. In addition, the Eligible Trustee may elect that
      the surviving spouse's periodic payment of benefits will be equal to a
      lower percentage of the periodic amount when both spouses were alive. The
      amount estimated to be payable under this method, through the remainder
      of the later of the lives of the Eligible Trustee and spouse, will be the
      actuarial equivalent of the Regular Benefit.


                                       21
<PAGE>

     The following table illustrates the retirement benefits accrued to the
Fund's Independent Trustees by the end for the fiscal year ended July 31, 1998
and by the 55 Morgan Stanley Dean Witter Funds (including the Fund) for the
year ended December 31, 1998, and the estimated retirement benefits for the
Independent Trustees, to commence upon their retirement, from the 55 Morgan
Stanley Dean Witter Funds as of December 31, 1998.

         RETIREMENT BENEFITS FROM ALL MORGAN STANLEY DEAN WITTER FUNDS


<TABLE>
<CAPTION>
                                    FOR ALL ADOPTING FUNDS                    ESTIMATED
                                -------------------------------  RETIREMENT     ANNUAL
                                   ESTIMATED                      BENEFITS     BENEFITS
                                    CREDITED                     ACCRUED AS      UPON
                                     YEARS         ESTIMATED      EXPENSES    RETIREMENT
                                 OF SERVICE AT   PERCENTAGE OF     BY ALL      FROM ALL
                                   RETIREMENT       ELIGIBLE      ADOPTING     ADOPTING
NAME OF INDEPENDENT TRUSTEE       (MAXIMUM 10)    COMPENSATION      FUNDS      FUNDS(2)
- ------------------------------- --------------- --------------- ------------ -----------
<S>                             <C>             <C>             <C>          <C>
Michael Bozic .................        10             60.44%       $22,377     $52,250
Edwin J. Garn .................        10             60.44         35,225      52,250
Wayne E. Hedien ...............         9             51.37         41,979      44,413
Dr. Manuel H. Johnson .........        10             60.44         14,047      52,250
Michael E. Nugent .............        10             60.44         25,336      52,250
John L. Schroeder .............         8             50.37         45,117      44,343
</TABLE>

- ----------
(2)   Based on current levels of compensation. Amount of annual benefits also
      varies depending on the Trustee's elections described in Footnote (1)
      above.

IV. CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
- --------------------------------------------------------------------------------
     The following owned 5% or more [to come].

     As of the date of this Statement of Additional Information, the aggregate
number of shares of beneficial interest of the Fund owned by the Fund's
officers and Trustees as a group was less than 1% of the Fund's shares of
beneficial interest outstanding.

V. INVESTMENT MANAGEMENT AND OTHER SERVICES
- --------------------------------------------------------------------------------
A. INVESTMENT MANAGER

     The Investment Manager to the Fund is Morgan Stanley Dean Witter Advisors
Inc., a Delaware corporation, whose address is Two World Trade Center, New
York, New York 10048. The Investment Manager is a wholly-owned subsidiary of
MSDW, a Delaware corporation. MSDW is a preeminent global financial services
firm that maintains leading market positions in each of its three primary
businesses: securities, asset management and credit services.

     Pursuant to an Investment Management Agreement (the "Management
Agreement") with the Investment Manager, the Fund has retained the Investment
Manager to provide administrative services and manage the investment of the
Fund's assets, including the placing of orders for the purchase and sale of
portfolio securities. The Fund pays the Investment Manager monthly compensation
calculated daily by applying the following annual rates to the net assets of
the Fund determined as of the close of each business day: 1.00% to the portion
of daily net assets not exceeding $500 million; and 0.95% to the portion of the
daily net assets exceeding $500 million. The management fee is allocated among
the Classes pro rata based on the net assets of the Fund attributable to each
Class. For the fiscal years ended July 31, 1997, 1998 and 1999, the Investment
Manager accrued total compensation under the Management Agreement in the
amounts of $4,491,688, $4,024,502 and $      , respectively.

     The Investment Manager has retained its wholly-owned subsidiary, MSDW
Services Company, to perform administrative services for the Fund.


                                       22
<PAGE>

B. PRINCIPAL UNDERWRITER

     The Fund's principal underwriter is the Distributor (which has the same
address as the Investment Manager). In this capacity, the Fund's shares are
distributed by the Distributor. The Distributor has entered into a selected
dealer agreement with Dean Witter Reynolds, which through its own sales
organization sells shares of the Fund. In addition, the Distributor may enter
into similar agreements with other selected broker-dealers. The Distributor, a
Delaware corporation, is a wholly-owned subsidiary of MSDW.

     The Distributor bears all expenses it may incur in providing services
under the Distribution Agreement. These expenses include the payment of
commissions for sales of the Fund's shares and incentive compensation to
Financial Advisors. The Distributor also pays certain expenses in connection
with the distribution of the Fund's shares, including the costs of preparing,
printing and distributing advertising or promotional materials, and the costs
of printing and distributing prospectuses and supplements thereto used in
connection with the offering and sale of the Fund's shares. The Fund bears the
costs of initial typesetting, printing and distribution of prospectuses and
supplements thereto to shareholders. The Fund also bears the costs of
registering the Fund and its shares under federal and state securities laws and
pays filing fees in accordance with state securities laws.

     The Fund and the Distributor have agreed to indemnify each other against
certain liabilities, including liabilities under the Securities Act. Under the
Distribution Agreement, the Distributor uses its best efforts in rendering
services to the Fund, but in the absence of willful misfeasance, bad faith,
gross negligence or reckless disregard of its obligations, the Distributor is
not liable to the Fund or any of its shareholders for any error of judgment or
mistake of law or for any act or omission or for any losses sustained by the
Fund or its shareholders.

C. SERVICES PROVIDED BY THE INVESTMENT MANAGER AND FUND EXPENSES PAID BY THIRD
   PARTIES

     The Investment Manager manages the investment of the Fund's assets,
including the placing of orders for the purchase and sale of portfolio
securities. The Investment Manager obtains and evaluates the information and
advice relating to the economy, securities markets, and specific securities as
it considers necessary or useful to continuously manage the assets of the Fund
in a manner consistent with its investment objective.

     Under the terms of the Management Agreement, in addition to managing the
Fund's investments, the Investment Manager maintains certain of the Fund's
books and records and furnishes, at its own expense, the office space,
facilities, equipment, clerical help, bookkeeping and certain legal services as
the Fund may reasonably require in the conduct of its business, including the
preparation of prospectuses, proxy statements and reports required to be filed
with federal and state securities commissions (except insofar as the
participation or assistance of independent accountants and attorneys is, in the
opinion of the Investment Manager, necessary or desirable). In addition, the
Investment Manager pays the salaries of all personnel, including officers of
the Fund, who are employees of the Investment Manager. The Investment Manager
also bears the cost of telephone service, heat, light, power and other
utilities provided to the Fund.

     Expenses not expressly assumed by the Investment Manager under the
Management Agreement or by the Distributor, will be paid by the Fund. These
expenses will be allocated among the four Classes of shares pro rata based on
the net assets of the Fund attributable to each Class, except as described
below. Such expenses include, but are not limited to: expenses of the Plan of
Distribution pursuant to Rule 12b-1; charges and expenses of any registrar,
custodian, stock transfer and dividend disbursing agent; brokerage commissions;
taxes; engraving and printing share certificates; registration costs of the
Fund and its shares under federal and state securities laws; the cost and
expense of printing, including typesetting, and distributing prospectuses of
the Fund and supplements thereto to the Fund's shareholders; all expenses of
shareholders' and Trustees' meetings and of preparing, printing and mailing of
proxy statements and reports to shareholders; fees and travel expenses of
Trustees or members of any advisory board or committee who are not employees of
the Investment Manager or any corporate affiliate of the Investment Manager;
all expenses incident to any dividend, withdrawal or


                                       23
<PAGE>

redemption options; charges and expenses of any outside service used for
pricing of the Fund's shares; fees and expenses of legal counsel, including
counsel to the Trustees who are not interested persons of the Fund or of the
Investment Manager (not including compensation or expenses of attorneys who are
employees of the Investment Manager); fees and expenses of the Fund's
independent accountants; membership dues of industry associations; interest on
Fund borrowings; postage; insurance premiums on property or personnel
(including officers and Trustees) of the Fund which inure to its benefit;
extraordinary expenses (including, but not limited to, legal claims and
liabilities and litigation costs and any indemnification relating thereto); and
all other costs of the Fund's operation. The 12b-1 fees relating to a
particular Class will be allocated directly to that Class. In addition, other
expenses associated with a particular Class (except advisory or custodial fees)
may be allocated directly to that Class, provided that such expenses are
reasonably identified as specifically attributable to that Class and the direct
allocation to that Class is approved by the Trustees.

     The Management Agreement provides that in the absence of willful
misfeasance, bad faith, gross negligence or reckless disregard of its
obligations thereunder, the Investment Manager is not liable to the Fund or any
of its investors for any act or omission by the Investment Manager or for any
losses sustained by the Fund or its investors.

     The Management Agreement will remain in effect from year to year, provided
continuance of the Management Agreement is approved at least annually by the
vote of the holders of a majority, as defined in the Investment Company Act, of
the outstanding shares of the Fund, or by the Trustees; provided that in either
event such continuance is approved annually by the vote of a majority of the
Trustees.

D. DEALER REALLOWANCES

     Upon notice to selected broker-dealers, the Distributor may reallow up to
the full applicable front-end sales charge during periods specified in such
notice. During periods when 90% or more of the sales charge is reallowed, such
selected broker-dealers may be deemed to be underwriters as that term is
defined in the Securities Act.

E. RULE 12b-1 PLAN

     The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under
the Investment Company Act (the "Plan") pursuant to which each Class, other
than Class D, pays the Distributor compensation accrued daily and payable
monthly at the following annual rates: 0.25% and 1.0% of the average daily net
assets of Class A and Class C, respectively, and, with respect to Class B, 1.0%
of the lesser of: (a) the average daily aggregate gross sales of the Fund's
Class B shares since the inception of the Fund (not including reinvestments of
dividends or capital gains distributions), less the average daily aggregate net
asset value of the Fund's Class B shares redeemed since the Fund's inception
upon which a contingent deferred sales charge has been imposed or upon which
such charge has been waived; or (b) the average daily net assets of Class B.


                                       24
<PAGE>

     The Distributor also receives the proceeds of front-end sales charges
("FSCs") and of contingent deferred sales charges ("CDSCs") imposed on certain
redemptions of shares, which are separate and apart from payments made pursuant
to the Plan. The Distributor has informed the Fund that it and/or Dean Witter
Reynolds received the proceeds of CDSCs and FSCs, for the last three fiscal
years ended July 31, in approximate amounts as provided in the table below (the
Distributor did not retain any of these amounts).




<TABLE>
<CAPTION>
                              1999                     1998                       1997
                     ----------------------   ----------------------   ---------------------------
<S>                  <C>          <C>         <C>        <C>           <C>        <C>
Class A ..........   FSCs:(1)      $          FSCs:      $  4,691      FSCs:         $       0(2)
                     CDSCs:        $          CDSCs:     $      0      CDSCs:                0(2)
Class B ..........   CDSCs:        $          CDSCs:     $944,044      CDSCs:        $1,142,039
Class C ..........   CDSCs:        $          CDSCs:     $    249      CDSCs:                0(2)
</TABLE>

- ----------
(1)   FSCs apply to Class A only.

(2)   This Class commenced operations on July 28, 1997.

     The Distributor has informed the Fund that the entire fee payable by Class
A and a portion of the fees payable by each of Class B and Class C each year
pursuant to the Plan equal to 0.25% of such Class' average daily net assets are
currently each characterized as a "service fee" under the Rules of the National
Association of Securities Dealers, Inc. (of which the Distributor is a member).
The "service fee" is a payment made for personal service and/or the maintenance
of shareholder accounts. The remaining portion of the Plan fees payable by a
Class, if any, is characterized as an "asset-based sales charge" as such is
defined by the Rules of the Association.

     Under the Plan and as required by Rule 12b-1, the Trustees receive and
review promptly after the end of each calendar quarter a written report
provided by the Distributor of the amounts expended under the Plan and the
purpose for which such expenditures were made. For the fiscal year ended July
31, 1999, Class B shares of the Fund accrued amounts payable to the Distributor
under the Plan of $      . This amount is equal to     % of the average daily
net assets of Class B and was calculated pursuant to Clause (  ) of the
compensation formula under the Plan. For the fiscal year ended July 31, 1999,
Class A and Class C shares of the Fund accrued payments under the Plan
amounting to $      and $      , respectively, which amounts are equal to     %
and     % of the average daily net assets of Class A and Class C, respectively,
for the fiscal year.

     The Plan was adopted in order to permit the implementation of the Fund's
method of distribution. Under this distribution method the Fund offers four
Classes, each with a different distribution arrangement.

     With respect to Class A shares, Dean Witter Reynolds compensates its
Financial Advisors by paying them, from proceeds of the FSC, commissions for
the sale of Class A shares, currently a gross sales credit of up to 5.0% of the
amount sold (except as provided in the following sentence) and an annual
residual commission, currently a residual of up to 0.25% of the current value
of the respective accounts for which they are the Financial Advisors or dealers
of record in all cases. On orders of $1 million or more (for which no sales
charge was paid) or net asset value purchases by employer-sponsored employee
benefit plans, whether or not qualified under the Internal Revenue Code, for
which the Transfer Agent serves as Trustee or Dean Witter Reynolds Retirement
Plan Services serves as recordkeeper pursuant to a written Recordkeeping
Services Agreement ("MSDW Eligible Plans"), the Investment Manager compensates
Financial Advisors by paying them, from its own funds, a gross sales credit of
1.0% of the amount sold.

     With respect to Class B shares, Dean Witter Reynolds compensates its
Financial Advisors by paying them, from its own funds, commissions for the sale
of Class B shares, currently a gross sales credit of up to 5.0% of the amount
sold (except as provided in the following sentence) and an annual residual
commission, currently a residual of up to 0.25% of the current value (not
including reinvested dividends


                                       25
<PAGE>

or distributions) of the amount sold in all cases. In the case of Class B
shares purchased by MSDW Eligible Plans, Dean Witter Reynolds compensates its
Financial Advisors by paying them, from its own funds, a gross sales credit of
3.0% of the amount sold.

     With respect to Class C shares, Dean Witter Reynolds compensates its
Financial Advisors by paying them, from its own funds, commissions for the sale
of Class C shares, currently a gross sales credit of up to 1.0% of the amount
sold and an annual residual commission, currently up to 1.0% of the current
value of the respective accounts for which they are the Financial Advisors of
record.

     With respect to Class D shares other than shares held by participants in
the Investment Manager's mutual fund asset allocation program, the Investment
Manager compensates Dean Witter Reynolds's Financial Advisors by paying them,
from its own funds, commissions for the sale of Class D shares, currently a
gross sales credit of up to 1.0% of the amount sold. There is a chargeback of
100% of the amount paid if the Class D shares are redeemed in the first year
and a chargeback of 50% of the amount paid if the Class D shares are redeemed
in the second year after purchase. The Investment Manager also compensates Dean
Witter Reynolds's Financial Advisors by paying them, from its own funds, an
annual residual commission, currently up to 0.10% of the current value of the
respective accounts for which they are the Financial Advisors of record (not
including accounts of participants in the Investment Manager's mutual fund
asset allocation program).

     The gross sales credit is a charge which reflects commissions paid by Dean
Witter Reynolds to its Financial Advisors and Dean Witter Reynolds's
Fund-associated distribution-related expenses, including sales compensation,
and overhead and other branch office distribution-related expenses including
(a) the expenses of operating Dean Witter Reynolds's branch offices in
connection with the sale of Fund shares, including lease costs, the salaries
and employee benefits of operations and sales support personnel, utility costs,
communications costs and the costs of stationery and supplies, (b) the costs of
client sales seminars, (c) travel expenses of mutual fund sales coordinators to
promote the sale of Fund shares and (d) other expenses relating to branch
promotion of Fund sales.

     The distribution fee that the Distributor receives from the Fund under the
Plan, in effect, offsets distribution expenses incurred under the Plan on
behalf of the Fund and, in the case of Class B shares, opportunity costs, such
as the gross sales credit and an assumed interest charge thereon ("carrying
charge"). In the Distributor's reporting of the distribution expenses to the
Fund, in the case of Class B shares, such assumed interest (computed at the
"broker's call rate") has been calculated on the gross credit as it is reduced
by amounts received by the Distributor under the Plan and any contingent
deferred sales charges received by the Distributor upon redemption of shares of
the Fund. No other interest charge is included as a distribution expense in the
Distributor's calculation of its distribution costs for this purpose. The
broker's call rate is the interest rate charged to securities brokers on loans
secured by exchange-listed securities.

     The Fund is authorized to reimburse expenses incurred or to be incurred in
promoting the distribution of the Fund's Class A and Class C shares and in
servicing shareholder accounts. Reimbursement will be made through payments at
the end of each month. The amount of each monthly payment may in no event
exceed an amount equal to a payment at the annual rate of 0.25%, in the case of
Class A, and 1.0%, in the case of Class C, of the average net assets of the
respective Class during the month. No interest or other financing charges, if
any, incurred on any distribution expenses on behalf of Class A and Class C
will be reimbursable under the Plan. With respect to Class A, in the case of
all expenses other than expenses representing the service fee, and, with
respect to Class C, in the case of all expenses other than expenses
representing a gross sales credit or a residual to Financial Advisors and other
authorized financial representatives, such amounts shall be determined at the
beginning of each calendar quarter by the Trustees, including, a majority of
the Independent Trustees. Expenses representing the service fee (for Class A)
or a gross sales credit or a residual to Financial Advisors and other
authorized financial representatives (for Class C) may be reimbursed without
prior determination. In the event that the Distributor proposes that monies
shall be reimbursed for other than such expenses, then in making quarterly
determinations of the amounts that may be reimbursed by the Fund, the
Distributor will provide and the Trustees will review a quarterly budget of
projected distribution expenses


                                       26
<PAGE>

to be incurred on behalf of the Fund, together with a report explaining the
purposes and anticipated benefits of incurring such expenses. The Trustees will
determine which particular expenses, and the portions thereof, that may be
borne by the Fund, and in making such a determination shall consider the scope
of the Distributor's commitment to promoting the distribution of the Fund's
Class A and Class C shares.

     Each Class paid 100% of the amounts accrued under the Plan with respect to
that Class for the fiscal year ended July 31, 1999 to the Distributor. The
Distributor and Dean Witter Reynolds estimate that they have spent, pursuant to
the Plan, $         on behalf of Class B since the inception of the Plan. It is
estimated that this amount was spent in approximately the following ways: (i)
    % ($      ) -- advertising and promotional expenses; (ii)    % ($      ) --
printing of prospectuses for distribution to other than current shareholders;
and (iii)    % ($      ) -- other expenses, including the gross sales credit
and the carrying charge, of which    % ($      ) represents carrying charges,
   % ($      ) represents commission credits to Dean Witter Reynolds branch
offices and other selected broker-dealers for payments of commissions to
Financial Advisors and other authorized financial representatives, and     %
($      ) represents overhead and other branch office distribution-related
expenses. The amounts accrued by Class A and a portion of the amounts accrued
by Class C under the Plan during the fiscal year ended July 31, 1999 were
service fees. The remainder of the amounts accrued by Class C were for expenses
which relate to compensation of sales personnel and associated overhead
expenses.

     In the case of Class B shares, at any given time, the expenses of
distributing shares of the Fund may be more or less than the total of (i) the
payments made by the Fund pursuant to the Plan; and (ii) the proceeds of CDSCs
paid by investors upon redemption of shares. For example, if $1 million in
expenses in distributing Class B shares of the Fund had been incurred and
$750,000 had been received as described in (i) and (ii) above, the excess
expense would amount to $250,000. The Distributor has advised the Fund that in
the case of Class B shares the excess distribution expenses, including the
carrying charge designed to approximate the opportunity costs incurred by Dean
Witter Reynolds which arise from it having advanced monies without having
received the amount of any sales charges imposed at the time of sale of the
Fund's Class B shares, totaled $       as of July 31, 1999 (the end of the
Fund's fiscal year), which was equal to    % of the net assets of Class B on
such date. Because there is no requirement under the Plan that the Distributor
be reimbursed for all distribution expenses with respect to Class B shares or
any requirement that the Plan be continued from year to year, this excess
amount does not constitute a liability of the Fund. Although there is no legal
obligation for the Fund to pay expenses incurred in excess of payments made to
the Distributor under the Plan and the proceeds of CDSCs paid by investors upon
redemption of shares, if for any reason the Plan is terminated, the Trustees
will consider at that time the manner in which to treat such expenses. Any
cumulative expenses incurred, but not yet recovered through distribution fees
or CDSCs, may or may not be recovered through future distribution fees or
CDSCs.

     In the case of Class A and Class C shares, expenses incurred pursuant to
the Plan in any calendar year in excess of 0.25% or 1.0% of the average daily
net assets of Class A or Class C, respectively, will not be reimbursed by the
Fund through payments in any subsequent year, except that expenses representing
a gross sales commission credited to Morgan Stanley Dean Witter Financial
Advisors and other authorized financial representatives at the time of sale may
be reimbursed in the subsequent calendar year. The Distributor has advised the
Fund that unreimbursed expenses representing a gross sales commission credited
to Morgan Stanley Dean Witter Financial Advisors and other authorized financial
representatives at the time of sale totaled $       in the case of Class C at
December 31, 1998 (end of the calendar year), which amount was equal to   % of
the net assets of Class C on such date, and that there were no such expenses
that may be reimbursed in the subsequent year in the case of Class A on such
date. No interest or other financing charges will be incurred on any Class A or
Class C distribution expenses incurred by the Distributor under the Plan or on
any unreimbursed expenses due to the Distributor pursuant to the Plan.

     No interested person of the Fund nor any Independent Trustee has any
direct financial interest in the operation of the Plan except to the extent
that the Distributor, the Investment Manager, Dean Witter


                                       27
<PAGE>

Reynolds, MSDW Services Company or certain of their employees may be deemed to
have such an interest as a result of benefits derived from the successful
operation of the Plan or as a result of receiving a portion of the amounts
expended thereunder by the Fund.

     On an annual basis, the Trustees, including a majority of the Independent
Trustees, consider whether the Plan should be continued. Prior to approving the
last continuation of the Plan, the Trustees requested and received from the
Distributor and reviewed all the information which they deemed necessary to
arrive at an informed determination. In making their determination to continue
the Plan, the Trustees considered: (1) the Fund's experience under the Plan and
whether such experience indicates that the Plan is operating as anticipated;
(2) the benefits the Fund had obtained, was obtaining and would be likely to
obtain under the Plan, including that: (a) the Plan is essential in order to
give Fund investors a choice of alternatives for payment of distribution and
service charges and to enable the Fund to continue to grow and avoid a pattern
of net redemptions which, in turn, are essential for effective investment
management; and (b) without the compensation to individual brokers and the
reimbursement of distribution and account maintenance expenses of Dean Witter
Reynolds's branch offices made possible by the 12b-1 fees, Dean Witter Reynolds
could not establish and maintain an effective system for distribution,
servicing of Fund shareholders and maintenance of shareholder accounts; and (3)
what services had been provided and were continuing to be provided under the
Plan to the Fund and its shareholders. Based upon their review, the Trustees,
including each of the Independent Trustees, determined that continuation of the
Plan would be in the best interest of the Fund and would have a reasonable
likelihood of continuing to benefit the Fund and its shareholders. In the
Trustees' quarterly review of the Plan, they will consider its continued
appropriateness and the level of compensation provided therein.

     The Plan may not be amended to increase materially the amount to be spent
for the services described therein without approval by the shareholders of the
affected Class or Classes of the Fund, and all material amendments to the Plan
must also be approved by the Trustees in the manner described above. The Plan
may be terminated at any time, without payment of any penalty, by vote of a
majority of the Independent Trustees or by a vote of a majority of the
outstanding voting securities of the Fund (as defined in the Investment Company
Act) on not more than thirty days' written notice to any other party to the
Plan. So long as the Plan is in effect, the election and nomination of
Independent Trustees shall be committed to the discretion of the Independent
Trustees.

F. OTHER SERVICE PROVIDERS

(1) TRANSFER AGENT/DIVIDEND-PAYING AGENT

     Morgan Stanley Dean Witter Trust FSB is the Transfer Agent for the Fund's
shares and the Dividend Disbursing Agent for payment of dividends and
distributions on Fund shares and Agent for shareholders under various
investment plans. The principal business address of the Transfer Agent is
Harborside Financial Center, Plaza Two, Jersey City, New Jersey 07311.

(2) CUSTODIAN AND INDEPENDENT ACCOUNTANTS

     The Bank of New York, 90 Washington Street, New York, NY 10286, is the
Custodian of the Fund's assets. Any of the Fund's cash balances with the
Custodian in excess of $100,000 are unprotected by federal deposit insurance.
These balances may, at times, be substantial.

                                       , serves as the independent accountants
of the Fund. The independent accountants are responsible for auditing the
annual financial statements of the Fund.

(3) AFFILIATED PERSONS

     The Transfer Agent is an affiliate of the Investment Manager, and of the
Distributor. As Transfer Agent and Dividend Disbursing Agent, the Transfer
Agent's responsibilities include maintaining shareholder accounts, disbursing
cash dividends and reinvesting dividends, processing account registration


                                       28
<PAGE>

changes, handling purchase and redemption transactions, mailing prospectuses
and reports, mailing and tabulating proxies, processing share certificate
transactions, and maintaining shareholder records and lists. For these
services, the Transfer Agent receives a per shareholder account fee from the
Fund and is reimbursed for its out-of-pocket expenses in connection with such
services.

VI. BROKERAGE ALLOCATION AND OTHER PRACTICES
- --------------------------------------------------------------------------------
A. BROKERAGE TRANSACTIONS

     Subject to the general supervision of the Trustees, the Investment Manager
is responsible for decisions to buy and sell securities for the Fund, the
selection of brokers and dealers to effect the transactions, and the
negotiation of brokerage commissions, if any. Purchases and sales of securities
on a stock exchange are effected through brokers who charge a commission for
their services. In the over-the-counter market, securities are generally traded
on a "net" basis with dealers acting as principal for their own accounts
without a stated commission, although the price of the security usually
includes a profit to the dealer. The Fund also expects that securities will be
purchased at times in underwritten offerings where the price includes a fixed
amount of compensation, generally referred to as the underwriter's concession
or discount. Options and futures transactions will usually be effected through
a broker and a commission will be charged. On occasion, the Fund may also
purchase certain money market instruments directly from an issuer, in which
case no commissions or discounts are paid.

     For the fiscal years ended July 31, 1997, 1998 and 1999, the Fund paid a
total of $      , $       and $      , respectively, in brokerage commissions.

B. COMMISSIONS

     Pursuant to an order of the SEC, the Fund may effect principal
transactions in certain money market instruments with Dean Witter Reynolds. The
Fund will limit its transactions with Dean Witter Reynolds to U.S. Government
and government agency securities, bank money instruments (i.e., certificates of
deposit and bankers' acceptances) and commercial paper. The transactions will
be effected with Dean Witter Reynolds only when the price available from Dean
Witter Reynolds is better than that available from other dealers.

     During the fiscal years ended July 31, 1997, 1998 and 1999, the Fund did
not effect any principal transactions with Dean Witter Reynolds.

     Brokerage transactions in securities listed on exchanges or admitted to
unlisted trading privileges may be effected through Dean Witter Reynolds,
Morgan Stanley & Co. and other affiliated brokers and dealers. In order for an
affiliated broker or dealer to effect any portfolio transactions on an exchange
for the Fund, the commissions, fees or other remuneration received by the
affiliated broker or dealer must be reasonable and fair compared to the
commissions, fees or other remuneration paid to other brokers in connection
with comparable transactions involving similar securities being purchased or
sold on an exchange during a comparable period of time. This standard would
allow the affiliated broker or dealer to receive no more than the remuneration
which would be expected to be received by an unaffiliated broker in a
commensurate arm's-length transaction. Furthermore, the Trustees, including the
Independent Trustees, have adopted procedures which are reasonably designed to
provide that any commissions, fees or other remuneration paid to an affiliated
broker or dealer are consistent with the foregoing standard. The Fund does not
reduce the management fee it pays to the Investment Manager by any amount of
the brokerage commissions it may pay to an affiliated broker or dealer.

     During the fiscal years ended July 31, 1997, 1998 and 1999, the Fund paid
a total of $10,330, $38,725 and $      , respectively, in brokerage commissions
to Dean Witter Reynolds. During the fiscal year ended July 31, 1999, the
brokerage commissions paid to Dean Witter Reynolds represented approximately
    % of the total brokerage commissions paid by the Fund during the year and
were paid on account of transactions having an aggregate dollar value equal to
approximately     % of the aggregate dollar value of all portfolio transactions
of the Fund during the year for which commissions were paid.


                                       29
<PAGE>

     During the period June 1, 1997 through July 31, 1997 and during the fiscal
years ended July 31, 1998 and 1999, the Fund paid a total of $0, $33,730 and
$      , respectively, in brokerage commissions to Morgan Stanley & Co., which
broker-dealer became an affiliate of the Investment Manager on May 31, 1997
upon consummation of the merger of Dean Witter, Discover & Co. with Morgan
Stanley Group Inc. During the fiscal year ended July 31, 1999, the brokerage
commissions paid to Morgan Stanley & Co. represented approximately    % of the
total brokerage commissions paid by the Fund for this period and were paid on
account of transactions having an aggregate dollar value equal to approximately
   % of the aggregate dollar value of all portfolio transactions of the Fund
during the year for which commissions were paid.

C. BROKERAGE SELECTION

     The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of transactions. Consistent with this
policy, when securities transactions are effected on a stock exchange, the
Fund's policy is to pay commissions which are considered fair and reasonable
without necessarily determining that the lowest possible commissions are paid
in all circumstances. The Fund believes that a requirement always to seek the
lowest possible commission cost could impede effective portfolio management and
preclude the Fund and the Investment Manager from obtaining a high quality of
brokerage and research services. In seeking to determine the reasonableness of
brokerage commissions paid in any transaction, the Investment Manager relies
upon its experience and knowledge regarding commissions generally charged by
various brokers and on its judgment in evaluating the brokerage and research
services received from the broker effecting the transaction. These
determinations are necessarily subjective and imprecise, as in most cases an
exact dollar value for those services is not ascertainable.

     The Fund anticipates that certain of its transactions involving foreign
securities will be effected on foreign securities exchanges. Fixed commissions
on such transactions are generally higher than negotiated commissions on
domestic transactions. There is also generally less government supervision and
regulation of foreign securities exchanges and brokers than in the United
States.

     In seeking to implement the Fund's policies, the Investment Manager
effects transactions with those brokers and dealers who the Investment Manager
believes provide the most favorable prices and are capable of providing
efficient executions. If the Investment Manager believes the prices and
executions are obtainable from more than one broker or dealer, it may give
consideration to placing portfolio transactions with those brokers and dealers
who also furnish research and other services to the Fund or the Investment
Manager. The services may include, but are not limited to, any one or more of
the following: information as to the availability of securities for purchase or
sale; statistical or factual information or opinions pertaining to investment;
wire services; and appraisals or evaluations of portfolio securities. The
information and services received by the Investment Manager from brokers and
dealers may be of benefit to the Investment Manager in the management of
accounts of some of its other clients and may not in all cases benefit the Fund
directly.

     The Investment Manager currently serves as investment manager to a number
of clients, including other investment companies, and may in the future act as
investment manager or advisor to others. It is the practice of the Investment
Manager to cause purchase and sale transactions to be allocated among the Fund
and others whose assets it manages in such manner as it deems equitable. In
making such allocations among the Fund and other client accounts, various
factors may be considered, including the respective investment objectives, the
relative size of portfolio holdings of the same or comparable securities, the
availability of cash for investment, the size of investment commitments
generally held and the opinions of the persons responsible for managing the
portfolios of the Fund and other client accounts. In the case of certain
initial and secondary public offerings, the Investment Manager may utilize a
pro rata allocation process based on the size of the Morgan Stanley Dean Witter
Funds involved and the number of shares available from the public offering.


                                       30
<PAGE>

D. DIRECTED BROKERAGE

     During the fiscal year ended July 31, 1999, the Fund paid $       in
brokerage commissions in connection with transactions in the aggregate amount
of $       to brokers because of research services provided.

E. REGULAR BROKER-DEALERS

     During the fiscal year ended July 31, 1999, the Fund did not purchase
securities issued by brokers or dealers that were among the ten brokers or ten
dealers which executed transactions for or with the Fund in the largest dollar
amounts during the period. At July 31, 1999, the Fund did not own any
securities issued by any such issuers.

VII. CAPITAL STOCK AND OTHER SECURITIES
- --------------------------------------------------------------------------------
     The shareholders of the Fund are entitled to a full vote for each full
share of beneficial interest held. The Fund is authorized to issue an unlimited
number of shares of beneficial interest. All shares of beneficial interest of
the Fund are of $0.01 par value and are equal as to earnings, assets and voting
privileges except that each Class will have exclusive voting privileges with
respect to matters relating to distribution expenses borne solely by such Class
or any other matter in which the interests of one Class differ from the
interests of any other Class. In addition, Class B shareholders will have the
right to vote on any proposed material increase in Class A's expenses, if such
proposal is submitted separately to Class A shareholders. Also, Class A, Class
B and Class C bear expenses related to the distribution of their respective
shares.

     The Fund's Declaration of Trust permits the Trustees to authorize the
creation of additional series of shares (the proceeds of which would be
invested in separate, independently managed portfolios) and additional Classes
of shares within any series. The Trustees have not presently authorized any
such additional series or Classes of shares other than as set forth in the
Prospectus.

     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 Investment Company Act or the Declaration of
Trust.

     Under Massachusetts law, shareholders of a business trust may, under
certain limited circumstances, be held personally liable as partners for the
obligations of the Fund. However, the Declaration of Trust contains an express
disclaimer of shareholder liability for acts or obligations of the Fund,
requires that notice of such Fund obligations include such disclaimer, and
provides for indemnification 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 thus, in the opinion of
Massachusetts counsel to the Fund, the risk to Fund shareholders of personal
liability is remote.

     All of the Trustees have been elected by the shareholders of the Fund,
most recently at a Special Meeting of Shareholders held on May 21, 1997. The
Trustees themselves have the power to alter the number and the terms of office
of the Trustees (as provided for in the Declaration of Trust), and they may at
any time lengthen or shorten their own terms or make their terms of unlimited
duration and appoint their own successors, provided that always at least a
majority of the Trustees has been elected by the shareholders of the Fund.
Under certain circumstances the Trustees may be removed by action of the
Trustees. The shareholders also have the right under certain circumstances to
remove the Trustees in accordance with the provisions of Section 16(c) of the
Investment Company Act of 1940. The voting rights of shareholders are not
cumulative, so that holders of more than 50 percent of the shares voting can,
if they choose, elect all Trustees being selected, while the holders of the
remaining shares would be unable to elect any Trustees.


                                       31
<PAGE>

VIII. PURCHASE, REDEMPTION AND PRICING OF SHARES
- --------------------------------------------------------------------------------
A. PURCHASE/REDEMPTION OF SHARES

     Information concerning how Fund shares are offered to the public (and how
they are redeemed and exchanged) is provided in the Fund's Prospectus.

     TRANSFER AGENT AS AGENT. With respect to the redemption or repurchase of
Fund shares, the application of proceeds to the purchase of new shares in the
Fund or any other Morgan Stanley Dean Witter Funds and the general
administration of the exchange privilege, the Transfer Agent acts as agent for
the Distributor and for the shareholder's authorized broker-dealer, if any, in
the performance of such functions. With respect to exchanges, redemptions or
repurchases, the Transfer Agent shall be liable for its own negligence and not
for the default or negligence of its correspondents or for losses in transit.
The Fund shall not be liable for any default or negligence of the Transfer
Agent, the Distributor or any authorized broker-dealer.

     The Distributor and any authorized broker-dealer have appointed the
Transfer Agent to act as their agent in connection with the application of
proceeds of any redemption of Fund shares to the purchase of shares of any
other Morgan Stanley Dean Witter Fund and the general administration of the
exchange privilege. No commission or discounts will be paid to the Distributor
or any authorized broker-dealer for any transaction pursuant to the exchange
privilege.

     TRANSFERS OF SHARES. In the event a shareholder requests a transfer of
Fund shares to a new registration, the shares will be transferred without sales
charge at the time of transfer. With regard to the status of shares which are
either subject to the CDSC or free of such charge (and with regard to the
length of time shares subject to the charge have been held), any transfer
involving less than all of the shares in an account will be made on a pro rata
basis (that is, by transferring shares in the same proportion that the
transferred shares bear to the total shares in the account immediately prior to
the transfer). The transferred shares will continue to be subject to any
applicable CDSC as if they had not been so transferred.

B. OFFERING PRICE

     The Fund's Class B, Class C and Class D shares are offered at net asset
value per share and the Class A shares are offered at net asset value per share
plus any applicable FSC which is distributed among the Fund's Distributor, Dean
Witter Reynolds and other authorized dealers as described in Section "V.
Investment Management and Other Services -- E. Rule 12b-1 Plan." The price of
Fund shares, called "net asset value," is based on the value of the Fund's
portfolio securities. Net asset value per share of each Class is calculated by
dividing the value of the portion of the Fund's securities and other assets
attributable to that Class, less the liabilities attributable to that Class, by
the number of shares of that Class outstanding. The assets of each Class of
shares are invested in a single portfolio. The net asset value of each Class,
however, will differ because the Classes have different ongoing fees.

     In the calculation of the Fund's net asset value: (1) an equity portfolio
security listed or traded on the New York or American Stock Exchange or other
stock exchange is valued at its latest sale price on that exchange, prior to
the time when assets are valued; if there were no sales that day, the security
is valued at the latest bid price (in cases where a security is traded on more
than one exchange, the security is valued on the exchange designated as the
primary market pursuant to procedures adopted by the Trustees); and (2) all
other portfolio securities for which over-the-counter market quotations are
readily available are valued at the latest bid price. When market quotations
are not readily available, including circumstances under which it is determined
by the Investment Manager that sale 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. For valuation purposes, quotations of
foreign portfolio securities, other assets and liabilities and forward
contracts stated in foreign currency are translated into U.S. dollar
equivalents at the prevailing market rates prior to the close of the New York
Stock Exchange.


                                       32
<PAGE>

     Short-term debt securities with remaining maturities of sixty days or less
at the time of purchase are valued at amortized cost, unless the Trustees
determine such does not reflect the securities' market value, in which case
these securities will be valued at their fair value as determined by the
Trustees.

     Certain of the Fund's portfolio securities may be valued by an outside
pricing service approved by the Fund's Trustees. The pricing service may
utilize a matrix system incorporating security quality, maturity and coupon as
the evaluation model parameters, and/or research evaluations by its staff,
including review of broker-dealer market price quotations in determining what
it believes is the fair valuation of the portfolio securities valued by such
pricing service.

     Listed options on debt securities are valued at the latest sale price on
the exchange on which they are listed unless no sales of such options have
taken place that day, in which case they will be valued at the mean between
their latest bid and asked prices. Unlisted options on debt securities and all
options on equity securities are valued at the mean between their latest bid
and asked prices. Futures are valued at the latest sale price on the
commodities exchange on which they trade unless the Trustees determine such
price does not reflect their market value, in which case they will be valued at
their fair value as determined in good faith under procedures established by
and under the supervision of the Trustees.

     Generally, trading in foreign securities, as well as corporate bonds, U.S.
Government securities and money market instruments, is substantially completed
each day at various times prior to the close of the New York Stock Exchange.
The values of such securities used in computing the net asset value of the
Fund's shares are determined as of such times. Foreign currency exchange rates
are also generally determined prior to the close of the New York Stock
Exchange. Occasionally, events which may affect the values of such securities
and such exchange rates may occur between the times at which they are
determined and the close of the New York Stock Exchange and will therefore not
be reflected in the computation of the Fund's net asset value. If events that
may affect the value of such securities occur during such period, then these
securities may be valued at their fair value as determined in good faith under
procedures established by and under the supervision of the Trustees.

IX. TAXATION OF THE FUND AND SHAREHOLDERS
- --------------------------------------------------------------------------------
     The Fund generally will make two basic types of distributions: ordinary
dividends and long-term capital gain distributions. These two types of
distributions are reported differently on a shareholder's income tax return and
they are also subject to different rates of tax. The tax treatment of the
investment activities of the Fund will affect the amount and timing and
character of the distributions made by the Fund. Tax issues relating to the
Fund are not generally a consideration for shareholders such as tax exempt
entities and tax-advantaged retirement vehicles such as an IRA or 401(k) plan.
Shareholders are urged to consult their own tax professionals regarding
specific questions as to federal, state or local taxes.

     INVESTMENT COMPANY TAXATION. The Fund intends to remain qualified as a
regulated investment company under Subchapter M of the Internal Revenue Code of
1986. As such, the Fund will not be subject to federal income tax on its net
investment income and capital gains, if any, to the extent that it distributes
such income and capital gains to its shareholders.

     The Fund generally intends to distribute sufficient income and gains so
that the Fund will not pay corporate income tax on its earnings. The Fund also
generally intends to distribute to its shareholders in each calendar year a
sufficient amount of ordinary income and capital gains to avoid the imposition
of a 4% excise tax. However, the Fund may instead determine to retain all or
part of any net long-term capital gains in any year for reinvestment. In such
event, the Fund will pay federal income tax (and possibly excise tax) on such
retained gains.

     Gains or losses on sales of securities by the Fund will be long-term
capital gains or losses if the securities have a tax holding period of more
than one year. Gains or losses on the sale of securities with a tax holding
period of one year or less will be short-term gains or losses.

     Gains or losses on the Fund's transactions in listed non-equity options,
futures and options on futures generally are treated as 60% long-term and 40%
short-term. When the Fund engages in options


                                       33
<PAGE>

and futures transactions, various tax rules may accelerate or defer recognition
of certain gains and losses, change the character of certain gains or losses,
or alter the holding period of other investments held by the Fund. The
application of these rules would therefore also affect the amount, timing and
character of distributions made by the Fund.

     Under certain tax rules, the Fund may be required to accrue a portion of
any discount at which certain securities are purchased as income each year even
though the Fund receives no payments in cash on the security during the year.
To the extent that the Fund invests in such securities, it would be required to
pay out such accrued discount as an income distribution in each year in order
to avoid taxation at the Fund level. Such distributions will be made from the
available cash of the Fund or by liquidation of portfolio securities if
necessary. If a distribution of cash necessitates the liquidation of portfolio
securities, the Investment Manager will select which securities to sell. The
Fund may realize a gain or loss from such sales. In the event the Fund realizes
net capital gains from such transactions, its shareholders may receive a larger
capital gain distribution, if any, than they would in the absence of such
transactions.

     TAXATION OF DIVIDENDS AND DISTRIBUTIONS. Shareholders normally will have
to pay federal income taxes, and any state and/or local income taxes, on the
dividends and other distributions they receive from the Fund. Such dividends
and distributions, to the extent that they are derived from net investment
income or short-term capital gains, are taxable to the shareholder as ordinary
income regardless of whether the shareholder receives such payments in
additional shares or in cash.

     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. The Taxpayer Relief Act of 1997
reduced the maximum tax on long-term capital gains applicable to individuals
from 28% to 20%.

     Shareholders are generally taxed on any ordinary dividend or capital gain
distributions from the Fund in the year they are actually distributed. However,
if any such dividends or distributions are declared in October, November or
December and paid in January then such amounts will be treated for tax purposes
as received by the shareholders on December 31, to shareholders of record of
such month.

     Subject to certain exceptions, a corporate shareholder may be eligible for
a 70% dividends received deduction to the extent that the Fund earns and
distributes qualifying dividends from its investments. Distributions of net
capital gains by the Fund will not be eligible for the dividends received
deduction.

     Shareholders who are not citizens or residents of the United States and
certain foreign entities may be subject to withholding of United States tax on
distributions made by the Fund of investment income and short term capital
gains.

     After the end of each calendar year, shareholders will be sent full
information on their dividends and capital gain distributions for tax purposes,
including the portion taxable as ordinary income, and the portion taxable as
long-term capital gains.

     PURCHASES AND REDEMPTIONS AND EXCHANGES OF FUND SHARES. Any dividend or
capital gains distribution received by a shareholder from any investment
company will have the effect of reducing the net asset value of the
shareholder's stock in that company by the exact amount of the dividend or
capital gains distribution. Furthermore, such dividends and capital gains
distributions are subject to federal income taxes. If the net asset value of
the shares should be reduced below a shareholder's cost as a result of the
payment of dividends or the distribution of realized long-term capital gains,
such payment or distribution would be in part a return of the shareholder's
investment but nonetheless would be taxable to the shareholder. Therefore, an
investor should consider the tax implications of purchasing Fund shares
immediately prior to a distribution record date.

     In general, a sale of shares results in capital gain or loss, and for
individual shareholders, is taxable at a federal rate dependent upon the length
of time the shares were held. A redemption of a shareholder's Fund shares is
normally treated as a sale for tax purposes. Fund shares held for a period of
one year or less will, for tax purposes, generally result in short-term gains
or losses and those held for more than


                                       34
<PAGE>

one year generally result in long-term gain or loss. Any loss realized by
shareholders upon a redemption of shares within six months of the date of their
purchase will be treated as a long-term capital loss to the extent of any
distributions of net long-term capital gains with respect to such shares during
the six-month period.

     Gain or loss on the sale or redemption of shares in the Fund is measured
by the difference between the amount received and the tax basis of the shares.
Shareholders should keep records of investments made (including shares acquired
through reinvestment of dividends and distributions) so they can compute the
tax basis of their shares. Under certain circumstances a shareholder may
compute and use an average cost basis in determining the gain or loss on the
sale or redemption of shares.

     Exchanges of Fund shares for shares of another fund, including shares of
other Morgan Stanley Dean Witter Funds, are also subject to similar tax
treatment. Such an exchange is treated for tax purposes as a sale of the
original shares in the first fund, followed by the purchase of shares in the
second fund.

     If a shareholder realizes a loss on the redemption or exchange of a fund's
shares and reinvests in that fund's shares within 30 days before or after the
redemption or exchange, the transactions may be subject to the "wash sale"
rules, resulting in a postponement of the recognition of such loss for tax
purposes.

X. UNDERWRITERS
- --------------------------------------------------------------------------------
     The Fund's shares are offered to the public on a continuous basis. The
Distributor, as the principal underwriter of the shares, has certain
obligations under the Distribution Agreement concerning the distribution of the
shares. These obligations and the compensation the Distributor receives are
described above in the sections titled "Principal Underwriter" and "Rule 12b-1
Plans."

XI. CALCULATION OF PERFORMANCE DATA
- --------------------------------------------------------------------------------
     From time to time, the Fund may quote its "total return" in advertisements
and sales literature. These figures are computed separately for Class A, Class
B, Class C and Class D shares. The Fund's "average annual total return"
represents an annualization of the Fund's total return over a particular period
and is computed by finding the annual percentage rate which will result in the
ending redeemable value of a hypothetical $1,000 investment made at the
beginning of a one, five or ten year period, or for the period from the date of
commencement of operations, if shorter than any of the foregoing. The ending
redeemable value is reduced by any contingent deferred sales charge ("CDSC") at
the end of the one, five, ten year or other period. For the purpose of this
calculation, it is assumed that all dividends and distributions are reinvested.
The formula for computing the average annual total return involves a percentage
obtained by dividing the ending redeemable value by the amount of the initial
investment (which in the case of Class A shares is reduced by the Class A
initial sales charge), taking a root of the quotient (where the root is
equivalent to the number of years in the period) and subtracting 1 from the
result. Based on this calculation, the average annual total returns for Class B
for the one year and five year periods ended July 31, 1999 and for the period
October 30, 1992 (commencement of operations) through July 31, 1999 were    %,
  % and    %, respectively. The average annual total returns of Class A for the
fiscal year ended July 31, 1999 and for the period July 28, 1997 (inception of
the Class) through July 31, 1999 were    % and    %, respectively. The average
annual total returns of Class C for the fiscal year ended July 31, 1999 and for
the period July 28, 1997 through July 31, 1999 were    % and    %,
respectively. The average annual total returns of Class D for the fiscal year
ended July 31, 1999 and for the period July 28, 1997 through July 31, 1999 were
   % and    %, respectively.

     In addition, the Fund may advertise its total return for each Class over
different periods of time by means of aggregate, average, year-by-year or other
types of total return figures. These calculations may or may not reflect the
imposition of the maximum front-end sales charge for Class A or the deduction
of the CDSC for each of Class B and Class C which, if reflected, would reduce
the performance quoted. For example, the average annual total return of the
Fund may be calculated in the manner described above,


                                       35
<PAGE>

but without deduction for any applicable sales charge. Based on this
calculation, the average annual total returns of Class B for the one year and
five year periods ended July 31, 1999 and for the period October 30, 1992
(commencement of operations) through July 31, 1999 were    %,     % and    %,
respectively. The average annual total returns of Class A for the fiscal year
ended July 31, 1999 and for the period July 28, 1997 through July 31, 1999 were
   % and    %, respectively. The average annual total returns of Class C for
the fiscal year ended July 31, 1999 and for the period July 28, 1997 through
July 31, 1999 were    % and    %, respectively. The average annual total
returns of Class D for the fiscal year ended July 31, 1999 and for the period
July 28, 1997 through July 31, 1999 were    % and    %, respectively.


     In addition, the Fund may compute its aggregate total return for each
Class for specified periods by determining the aggregate percentage rate which
will result in the ending value of a hypothetical $1,000 investment made at the
beginning of the period. For the purpose of this calculation, it is assumed
that all dividends and distributions are reinvested. The formula for computing
aggregate total return involves a percentage obtained by dividing the ending
value (without reduction for any sales charge) by the initial $1,000 investment
and subtracting 1 from the result. Based on this calculation, the total returns
of Class B for the one year and five year periods ended July 31, 1999 and for
the period October 30, 1992 (commencement of operations) through July 31, 1999
were    %,    % and    %, respectively. The total returns of Class A for the
fiscal year ended July 31, 1999 and for the period July 28, 1997 through July
31, 1999 were    % and    %, respectively. The total returns of Class C for the
fiscal year ended July 31, 1999 and for the period July 28, 1997 through July
31, 1999 were    % and    %, respectively. The total returns of Class D for the
fiscal year ended July 31, 1999 and for the period July 28, 1997 through July
31, 1999 were    % and    %, respectively.


     The Fund may also advertise the growth of hypothetical investments of
$10,000, $50,000 and $100,000 in each Class of shares of the Fund by adding 1
to the Fund's aggregate total return to date (expressed as a decimal and
without taking into account the effect of any applicable CDSC) and multiplying
by $9,475, $48,000 and $97,000 in the case of Class A (investments of $10,000,
$50,000 and $100,000 adjusted for the initial sales charge) or by $10,000,
$50,000 and $100,000 in the case of each of Class B, Class C and Class D, as
the case may be. Investments of $10,000, $50,000 and $100,000 in each Class at
inception of the Class would have grown to the following amounts at July 31,
1999:


<TABLE>
<CAPTION>
                                    INVESTMENT AT INCEPTION OF:
                     INCEPTION   ---------------------------------
CLASS                  DATE:      $10,000     $50,000     $100,000
- -----------------   ----------   ---------   ---------   ---------
<S>                 <C>          <C>         <C>         <C>
Class A .........   07/28/97     $           $           $
Class B .........   10/30/92
Class C .........   07/28/97
Class D .........   07/28/97
</TABLE>

     The Fund from time to time may also advertise its performance relative to
certain performance rankings and indexes compiled by recognized organizations.


XII. FINANCIAL STATEMENTS
- --------------------------------------------------------------------------------
     EXPERTS. The financial statements of the Fund for the fiscal year ended
July 31, 1999 included in this Statement of Additional Information and
incorporated by reference in the Prospectus have been so included and
incorporated in reliance on the report of              , independent
accountants, given on the authority of said firm as experts in auditing and
accounting.

                                    * * * * *

     This Statement of Additional Information and the Prospectus do not contain
all of the information set forth in the Registration Statement the Fund has
filed with the SEC. The complete Registration Statement may be obtained from
the SEC.


                                       36





<PAGE>











                          (MORGAN STANLEY DEAN WITTER
           HEALTH SCIENCES TRUST FINANCIAL STATEMENTS TO BE INSERTED)














<PAGE>

                MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST
                            PART C OTHER INFORMATION


Item 23.          Exhibits

1(a).             Declaration of Trust of the Registrant, dated May 26, 1992, is
                  incorporated by reference to Exhibit 1 of Post-Effective
                  Amendment No. 4 to the Registration Statement on Form N-1A,
                  filed on September 27, 1995.

1(b).             Instrument Establishing and Designating Additional Classes is
                  incorporated by reference to Exhibit 1 of Post-Effective
                  Amendment No. 6 to the Registration Statement on Form N-1A,
                  filed on July 17, 1997.

1(c).             Amendment dated May 26, 1992 to the Declaration of Trust of
                  the Registrant is incorporated by reference to Exhibit 1 of
                  Post-Effective Amendment No. 8 to the Registration Statement
                  on Form N-1A, filed on September 25, 1998.

2.                Amended and Restated By-Laws of the Registrant dated May 1,
                  1999, filed herein.

3.                Not applicable.

4.                Amended Investment Management Agreement between the Registrant
                  and Morgan Stanley Dean Witter Advisors Inc. is incorporated
                  by reference to Exhibit 5 of Post-Effective Amendment No. 8 to
                  the Registration Statement on Form N-1A, filed on September
                  25, 1998.

5(a).             Amended Distribution Agreement between the Registrant and
                  Morgan Stanley Dean Witter Advisors Inc. is incorporated by
                  reference to Exhibit 6 of Post-Effective Amendment No. 8 to
                  the Registration Statement on Form N-1A, filed on September
                  25, 1998.

5(b).             Selected Dealer Agreement between Morgan Stanley Dean Witter
                  Distributors Inc. and Dean Witter Reynolds Inc. is
                  incorporated by reference to Exhibit 6(b) of Post-Effective
                  Amendment No. 2 to the Registration Statement on Form N-1A,
                  filed on September 28, 1993.

5(c).             Omnibus Selected Dealer Agreement between Morgan Stanley Dean
                  Witter Distributors Inc.and National Financial Services
                  Corporation, dated October 17, 1998, filed herein.

<PAGE>

6.                Amended Retirement Plan for Non-Interested Trustees or
                  Directors, dated May 8, 1997, filed herein.

7(a).             Custody Agreement between the Registrant and The Bank of New
                  York, dated October 30, 1992, is incorporated by reference to
                  Exhibit 8 of Post-Effective Amendment No. 4 to the
                  Registration Statement on Form N-1A, filed on September 27,
                  1995.

7(b).             Amendment to the Custody Agreement between the Registrant and
                  The Bank of New York, dated April 17, 1996, is incorporated by
                  reference to Exhibit 8 of Post-Effective Amendment No. 5 to
                  the Registration Statement on Form N-1A, filed on September
                  25, 1996.

8(a).             Amended and Restated Transfer Agency and Services Agreement
                  between the Registrant and Morgan Stanley Dean Witter Trust
                  FSB is incorporated by reference to Exhibit 8 of
                  Post-Effective Amendment No. 8 to the Registration Statement
                  on Form N-1A, filed on September 25, 1998.

8(b).             Amended Services Agreement between the Registrant and Morgan
                  Stanley Dean Witter Service Company, dated June 22, 1998, is
                  incorporated by reference to Exhibit 9 to Post-Effective
                  Amendment No. 8 to the Registration Statement on Form N-1A,
                  filed on September 25, 1998.

9(a).             Opinion of Sheldon Curtis, Esq., dated August 17, 1992 is
                  incorporated by reference to Exhibit 10(a) of Pre-Effective
                  Amendment No. 1 to the Registration Statement on Form N-1A and
                  filed herein.

9(b).             Opinion of Lane, Altman & Owens LLP, Massachusetts Counsel,
                  dated August 18, 1992, is incorporated by reference to Exhibit
                  10(b) of Pre-Effective Amendment No. 1 to the Registration
                  Statement on Form N-1A, and filed herein.

10.               Not applicable

11.               Not applicable.

12.               Not applicable.

13.               Amended and Restated Plan of Distribution pursuant to Rule
                  12b-1 is incorporated by reference to Exhibit 15 of
                  Post-Effective Amendment No. 6 to the Registration Statement
                  on Form N-1A, filed on July 17, 1997.

<PAGE>

Other.            Powers of Attorney of Trustees are incorporated by reference
                  to Exhibit (Other) of Post-Effective Amendment No. 7 to the
                  Registration Statement on Form N-1A, filed on September 29,
                  1997 and Post-Effective Amendment No. 3 to the Registration
                  Statement on Form N-1A, filed on September 28, 1994.

Item 24.     Persons Controlled by or Under Common Control with the Fund.
             -----------------------------------------------------------

                      None

Item 25.     Indemnification.
             ---------------

     Pursuant to Section 5.3 of the Registrant's Declaration of Trust and under
Section 4.8 of the Registrant's By-Laws, the indemnification of the Registrant's
trustees, officers, employees and agents is permitted if it is determined that
they acted under the belief that their actions were in or not opposed to the
best interest of the Registrant, and, with respect to any criminal proceeding,
they had reasonable cause to believe their conduct was not unlawful. In
addition, indemnification is permitted only if it is determined that the actions
in question did not render them liable by reason of willful misfeasance, bad
faith or gross negligence in the performance of their duties or by reason of
reckless disregard of their obligations and duties to the Registrant. Trustees,
officers, employees and agents will be indemnified for the expense of litigation
if it is determined that they are entitled to indemnification against any
liability established in such litigation. The Registrant may also advance money
for these expenses provided that they give their undertakings to repay the
Registrant unless their conduct is later determined to permit indemnification.

             Pursuant to Section 5.2 of the Registrant's Declaration of Trust
and paragraph 8 of the Registrant's Investment Management Agreement, neither the
Investment Manager nor any trustee, officer, employee or agent of the Registrant
shall be liable for any action or failure to act, except in the case of bad
faith, willful misfeasance, gross negligence or reckless disregard of duties to
the Registrant.

             Insofar as indemnification for liabilities arising under the
Securities Act of 1933 (the "Act") may be permitted to trustees, officers and
controlling persons of the Registrant pursuant to the foregoing provisions or
otherwise, the Registrant has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Act and is, therefore, unenforceable. In the event that a claim
for indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a trustee, officer, or controlling
person of the Registrant in connection with the successful defense of any
action, suit or proceeding) is asserted against the Registrant by such trustee,
officer or controlling person in connection with the shares being registered,
the Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Act, and will be governed by the final adjudication of such
issue.

             The Registrant hereby undertakes that it will apply the
indemnification provision of its by-laws in a manner consistent with Release
11330 of the Securities and Exchange Commission under the Investment Company Act
of 1940, so long as the interpretation of Sections 17(h) and 17(i) of such Act
remains in effect.

<PAGE>

             Registrant, in conjunction with the Investment Manager,
Registrant's Trustees, and other registered investment management companies
managed by the Investment Manager, maintains insurance on behalf of any person
who is or was a Trustee, officer, employee, or agent of Registrant, or who is or
was serving at the request of Registrant as a trustee, director, officer,
employee or agent of another trust or corporation, against any liability
asserted against him and incurred by him or arising out of his position.
However, in no event will Registrant maintain insurance to indemnify any such
person for any act for which Registrant itself is not permitted to indemnify
him.

Item 26. Business and Other Connections of Investment Advisor

         See "The Fund and Its Management" in the Prospectus regarding the
business of the investment advisor. The following information is given regarding
officers of Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors"). MSDW
Advisors is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co.

         The term "Morgan Stanley Dean Witter Funds" refers to the following
registered investment companies:

Closed-End Investment Companies
- -------------------------------
(1)      Morgan Stanley Dean Witter California Insured Municipal Income Trust
(2)      Morgan Stanley Dean Witter California Quality Municipal Securities
(3)      Morgan Stanley Dean Witter Government Income Trust
(4)      Morgan Stanley Dean Witter High Income Advantage Trust
(5)      Morgan Stanley Dean Witter High Income Advantage Trust II
(6)      Morgan Stanley Dean Witter High Income Advantage Trust III
(7)      Morgan Stanley Dean Witter Income Securities Inc.
(8)      Morgan Stanley Dean Witter Insured California Municipal Securities
(9)      Morgan Stanley Dean Witter Insured Municipal Bond Trust
(10)     Morgan Stanley Dean Witter Insured Municipal Income Trust
(11)     Morgan Stanley Dean Witter Insured Municipal Securities
(12)     Morgan Stanley Dean Witter Insured Municipal Trust
(13)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust
(14)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust II
(15)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust III
(16)     Morgan Stanley Dean Witter Municipal Income Trust
(17)     Morgan Stanley Dean Witter Municipal Income Trust II
(18)     Morgan Stanley Dean Witter Municipal Income Trust III
(19)     Morgan Stanley Dean Witter Municipal Premium Income Trust
(20)     Morgan Stanley Dean Witter New York Quality Municipal Securities
(21)     Morgan Stanley Dean Witter Prime Income Trust
(22)     Morgan Stanley Dean Witter Quality Municipal Income Trust
(23)     Morgan Stanley Dean Witter Quality Municipal Investment Trust
(24)     Morgan Stanley Dean Witter Quality Municipal Securities

Open-end Investment Companies
- -----------------------------
(1)      Active Assets California Tax-Free Trust
(2)      Active Assets Government Securities Trust
(3)      Active Assets Money Trust
(4)      Active Assets Tax-Free Trust

<PAGE>

(5)      Morgan Stanley Dean Witter Aggressive Equity Fund
(6)      Morgan Stanley Dean Witter American Opportunities Fund
(7)      Morgan Stanley Dean Witter Balanced Growth Fund
(8)      Morgan Stanley Dean Witter Balanced Income Fund
(9)      Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(10)     Morgan Stanley Dean Witter California Tax-Free Income Fund
(11)     Morgan Stanley Dean Witter Capital Growth Securities
(12)     Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas
         Portfolio"
(13)     Morgan Stanley Dean Witter Convertible Securities Trust
(14)     Morgan Stanley Dean Witter Developing Growth Securities Trust
(15)     Morgan Stanley Dean Witter Diversified Income Trust
(16)     Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(17)     Morgan Stanley Dean Witter Equity Fund
(18)     Morgan Stanley Dean Witter European Growth Fund Inc.
(19)     Morgan Stanley Dean Witter Federal Securities Trust
(20)     Morgan Stanley Dean Witter Financial Services Trust
(21)     Morgan Stanley Dean Witter Fund of Funds
(22)     Morgan Stanley Dean Witter Global Dividend Growth Securities
(23)     Morgan Stanley Dean Witter Global Utilities Fund
(24)     Morgan Stanley Dean Witter Growth Fund
(25)     Morgan Stanley Dean Witter Hawaii Municipal Trust
(26)     Morgan Stanley Dean Witter Health Sciences Trust
(27)     Morgan Stanley Dean Witter High Yield Securities Inc.
(28)     Morgan Stanley Dean Witter Income Builder Fund
(29)     Morgan Stanley Dean Witter Information Fund
(30)     Morgan Stanley Dean Witter Intermediate Income Securities
(31)     Morgan Stanley Dean Witter International Fund
(32)     Morgan Stanley Dean Witter International SmallCap Fund
(33)     Morgan Stanley Dean Witter Japan Fund
(34)     Morgan Stanley Dean Witter Latin American Growth Fund
(35)     Morgan Stanley Dean Witter Limited Term Municipal Trust
(36)     Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(37)     Morgan Stanley Dean Witter Market Leader Trust
(38)     Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
(39)     Morgan Stanley Dean Witter Mid-Cap Equity Trust
(40)     Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(41)     Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(42)     Morgan Stanley Dean Witter New York Municipal Money Market Trust
(43)     Morgan Stanley Dean Witter New York Tax-Free Income Fund
(44)     Morgan Stanley Dean Witter North American Government Income Trust
(45)     Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(46)     Morgan Stanley Dean Witter Precious Metals and Minerals Trust
(47)     Morgan Stanley Dean Witter Real Estate Fund
(48)     Morgan Stanley Dean Witter S&P 500 Index Fund
(49)     Morgan Stanley Dean Witter S&P 500 Select Fund
(50)     Morgan Stanley Dean Witter Select Dimensions Investment Series
(51)     Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
(52)     Morgan Stanley Dean Witter Short-Term Bond Fund
(53)     Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(54)     Morgan Stanley Dean Witter Small Cap Growth Fund
(55)     Morgan Stanley Dean Witter Special Value Fund


<PAGE>

(56)     Morgan Stanley Dean Witter Strategist Fund
(57)     Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(58)     Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(59)     Morgan Stanley Dean Witter Total Return Trust
(60)     Morgan Stanley Dean Witter U.S. Government Money Market Trust
(61)     Morgan Stanley Dean Witter U.S. Government Securities Trust
(62)     Morgan Stanley Dean Witter Utilities Fund
(63)     Morgan Stanley Dean Witter Value-Added Market Series
(64)     Morgan Stanley Dean Witter Value Fund
(65)     Morgan Stanley Dean Witter Variable Investment Series
(66)     Morgan Stanley Dean Witter World Wide Income Trust



NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- -----------------           ------------------------------------------------

Mitchell M. Merin           President and Chief Operating Officer of Asset
President, Chief            Management of Morgan Stanley Dean Witter & Co.
Executive Officer and       ("MSDW); Chairman, Chief Executive Officer and
Director                    Director of Morgan Stanley Dean Witter Distributors
                            Inc. ("MSDW Distributors") and Morgan Stanley Dean
                            Witter Trust FSB ("MSDW Trust"); President, Chief
                            Executive Officer and Director of Morgan Stanley
                            Dean Witter Services Company Inc. ("MSDW Services");
                            President of the Morgan Stanley Dean Witter Funds
                            and Discover Brokerage Index Series; Executive Vice
                            President and Director of Dean Witter Reynolds Inc.
                            ("DWR"); Director of various MSDW subsidiaries.

Joseph J. McAlinden         Vice President of the Morgan Stanley Dean Witter
Executive Vice President    Funds and Discover Brokerage Index Series; Director
and Chief Investment        of MSDW Trust.
Officer

Ronald E. Robison           President MSDW Trust; Executive Vice President,
Executive Vice President,   Chief Administrative Officer and Director of MSDW
Chief Administrative        Services; Vice President of the Morgan Stanley Dean
Officer and Director        Witter Funds and Discover Brokerage Index Series.

Edward C. Oelsner, III
Executive Vice President

Barry Fink                  Assistant Secretary of DWR; Senior Vice President,
Senior Vice President,      Secretary, General Counsel and Director of MSDW
Secretary, General          Services; Senior Vice President, Assistant Secretary
Counsel and Director        and Assistant General Counsel of MSDW Distributors;
                            Vice President, Secretary and General Counsel of the
                            Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- --------------------        ------------------------------------------------
Peter M. Avelar             Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of the High
Yield Group

Mark Bavoso                 Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

Douglas Brown
Senior Vice President

Rosalie Clough
Senior Vice President
and Director of Marketing

Richard Felegy
Senior Vice President

Edward F. Gaylor            Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

Robert S. Giambrone         Senior Vice President of MSDW Services, MSDW
Senior Vice President       Distributors and MSDW Trust and Director of MSDW
                            Trust; Vice President of the Morgan Stanley Dean
                            Witter Funds and Discover Brokerage Index Series.

Rajesh K. Gupta             Vice President of various Morgan Stanley Dean Witter
Senior Vice President,      Funds.
Director of the Taxable
Fixed Income Group and
Chief Administrative
Officer - Investments

Kenton J. Hinchliffe        Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds and Discover Brokerage Index Series.

Kevin Hurley                Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

Jenny Beth Jones            Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

Michelle Kaufman            Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- -----------------------     -------------------------------------------------
John B. Kemp, III           President of MSDW Distributors.
Senior Vice President

Anita H. Kolleeny           Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of Sector
Rotation

Jonathan R. Page            Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of the Money
Market Group

Ira N. Ross                 Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

Guy G. Rutherfurd, Jr.      Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of the
Growth Group

Rochelle G. Siegel          Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.

James Solloway
Senior Vice President

Paul D. Vance               Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of the
Growth and Income Group

Elizabeth A. Vetell
Senior Vice President
and Director of
Shareholder Communication

James F. Willison           Vice President of various Morgan Stanley Dean Witter
Senior Vice President       Funds.
and Director of the
Tax-Exempt Fixed
Income Group


<PAGE>


NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- ----------------------      -------------------------------------------------
Frank Bruttomesso           First Vice President and Assistant Secretary of MSDW
First Vice President and    Services; Assistant Secretary of MSDW Distributors,
Assistant Secretary         the Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

Thomas F. Caloia            First Vice President and Assistant Treasurer of
First Vice President        MSDW Services; Assistant Treasurer of MSDW
and Assistant               Distributors; Treasurer and Chief Financial and
Treasurer                   Accounting Officer of the Morgan Stanley Dean Witter
                            Funds and Discover Brokerage Index Series.

Thomas Chronert
First Vice President

Marilyn K. Cranney          Assistant Secretary of DWR; First Vice President and
First Vice President        Assistant Secretary of MSDW Services; Assistant
and Assistant Secretary     Secretary of MSDW Distributors, the Morgan Stanley
                            Dean Witter Funds and Discover Brokerage Index
                            Series.

Salvatore DeSteno           First Vice President of MSDW Services.
First Vice President

Peter W. Gurman
First Vice President

Michael Interrante          First Vice President and Controller of MSDW
First Vice President        Services; Assistant Treasurer of MSDW Distributors;
and Controller              First Vice President and Treasurer of MSDW Trust.

David Johnson
First Vice President

Stanley Kapica
First Vice President

Lou Anne D. McInnis         First Vice President and Assistant Secretary of MSDW
First Vice President and    Services; Assistant Secretary of MSDW Distributors,
Assistant Secretary         the Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

Carsten Otto                First Vice President and Assistant Secretary of MSDW
First Vice President        Services; Assistant Secretary of MSDW Distributors,
and Assistant Secretary     the Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

<PAGE>


NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- ----------------------      -------------------------------------------------
Ruth Rossi                  First Vice President and Assistant Secretary of MSDW
First Vice President and    Services; Assistant Secretary of MSDW Distributors,
Assistant Secretary         the Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

James P. Wallin
First Vice President

Robert Abreu
Vice President

Dale Albright
Vice President

Joan G. Allman
Vice President

Andrew Arbenz
Vice President

Joseph Arcieri              Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Armon Bar-Tur               Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Raymond Basile
Vice President

Nancy Belza
Vice President

Maurice Bendrihem
Vice President and
Assistant Controller

Dale Boettcher
Vice President

Ronald Caldwell
Vice President

Joseph Cardwell
Vice President

Liam Carroll
Vice President







<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- ----------------------      -------------------------------------------------

Philip Casparius
Vice President

Aaron Clark
Vice President


William Connerly
Vice President

David Dineen
Vice President

Sheila Finnerty             Vice President of Morgan Stanley Dean Witter Prime
Vice President              Income Trust

Jeffrey D. Geffen
Vice President

Sandra Gelpieryn
Vice President

Charmaine George
Vice President

Michael Geringer
Vice President

Gail Gerrity
Vice President

Ellen Gold
Vice President

Stephen Greenhut
Vice President

Trey Hancock
Vice President

Matthew Haynes              Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Peter Hermann               Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- ----------------------      -------------------------------------------------

David T. Hoffman
Vice President

Kevin Jung                  Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Carol Espejo-Kane
Vice President

Nancy Karole-Kennedy
Vice President

Doug Ketterer
Vice President

Paula LaCosta               Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Kimberly LaHart
Vice President

Thomas Lawlor
Vice President

Todd Lebo                   Vice President and Assistant Secretary of MSDW
Vice President and          Services; Assistant Secretary of MSDW Distributors,
Assistant Secretary         the Morgan Stanley Dean Witter Funds and Discover
                            Brokerage Index Series.

Gerard J. Lian              Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Nancy Login
Vice President

Sharon Loguercio
Vice President

Steven MacNamara
Vice President

Catherine Maniscalco        Vice President of Morgan Stanley Dean Witter Natural
Vice President              Resource Development Securities Inc.

Albert McGarity
Vice President


<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- ----------------------      -------------------------------------------------

Teresa McRoberts            Vice President of Morgan Stanley Dean Witter S&P 500
Vice President              Select Fund.

Mark Mitchell
Vice President

Julie Morrone
Vice President

Mary Beth Mueller
Vice President

David Myers                 Vice President of Morgan Stanley Dean Witter Natural
Vice President              Resource Development Securities Inc.

James Nash
Vice President

Richard Norris
Vice President

Anne Pickrell               Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Dawn Rorke
Vice President

John Roscoe                 Vice President of Morgan Stanley Dean Witter
Vice President              Real Estate Fund

Hugh Rose
Vice President

Robert Rossetti             Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Carl F. Sadler
Vice President

Deborah Santaniello
Vice President

Patrice Saunders
Vice President

Howard A. Schloss           Vice President of Morgan Stanley Dean Witter Federal
Vice President              Securities Trust.

<PAGE>

NAME AND POSITION WITH      OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN         OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.        AND NATURE OF CONNECTION
- -----------------------     --------------------------------------------------

Peter J. Seeley             Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Robert Stearns
Vice President

Naomi Stein
Vice President

Michael Strayhorn
Vice President

Kathleen H. Stromberg       Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

Marybeth Swisher
Vice President

Michael Thayer
Vice President

Robert Vanden Assem
Vice President

David Walsh
Vice President

Alice Weiss                 Vice President of various Morgan Stanley Dean Witter
Vice President              Funds.

John Wong
Vice President


         The principal address of MSDW Advisors, MSDW Services, MSDW
Distributors, DWR, the Morgan Stanley Dean Witter Funds and Discover Brokerage
Index Series is Two World Trade Center, New York, New York 10048. The principal
address of MSDW is 1585 Broadway, New York, New York 10036. The principal
address of MSDW Trust is 2 Harborside Financial Center, Jersey City, New Jersey
07311.

Item 27.    Principal Underwriters
            ----------------------

(a) Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors"), a
Delaware corporation, is the principal underwriter of the Registrant. MSDW
Distributors is also the principal underwriter of the following investment
companies:

(1)     Active Assets California Tax-Free Trust
(2)     Active Assets Government Securities Trust


<PAGE>

(3)     Active Assets Money Trust
(4)     Active Assets Tax-Free Trust
(5)     Morgan Stanley Dean Witter Aggressive Equity Fund
(6)     Morgan Stanley Dean Witter American Opportunities Fund
(7)     Morgan Stanley Dean Witter Balanced Growth Fund
(8)     Morgan Stanley Dean Witter Balanced Income Fund
(9)     Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(10)    Morgan Stanley Dean Witter California Tax-Free Income Fund
(11)    Morgan Stanley Dean Witter Capital Growth Securities
(12)    Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas Portfolio"
(13)    Morgan Stanley Dean Witter Convertible Securities Trust
(14)    Morgan Stanley Dean Witter Developing Growth Securities Trust
(15)    Morgan Stanley Dean Witter Diversified Income Trust
(16)    Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(17)    Morgan Stanley Dean Witter Equity Fund
(18)    Morgan Stanley Dean Witter European Growth Fund Inc.
(19)    Morgan Stanley Dean Witter Federal Securities Trust
(20)    Morgan Stanley Dean Witter Financial Services Trust
(21)    Morgan Stanley Dean Witter Fund of Funds
(22)    Morgan Stanley Dean Witter Global Dividend Growth Securities
(23)    Morgan Stanley Dean Witter Global Utilities Fund
(24)    Morgan Stanley Dean Witter Growth Fund
(25)    Morgan Stanley Dean Witter Hawaii Municipal Trust
(26)    Morgan Stanley Dean Witter Health Sciences Trust
(27)    Morgan Stanley Dean Witter High Yield Securities Inc.
(28)    Morgan Stanley Dean Witter Income Builder Fund
(29)    Morgan Stanley Dean Witter Information Fund
(30)    Morgan Stanley Dean Witter Intermediate Income Securities
(31)    Morgan Stanley Dean Witter International Fund
(32)    Morgan Stanley Dean Witter International SmallCap Fund
(33)    Morgan Stanley Dean Witter Japan Fund
(34)    Morgan Stanley Dean Witter Latin American Growth Fund
(35)    Morgan Stanley Dean Witter Limited Term Municipal Trust
(36)    Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(37)    Morgan Stanley Dean Witter Market Leader Trust
(38)    Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
(39)    Morgan Stanley Dean Witter Mid-Cap Equity Trust
(40)    Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(41)    Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(42)    Morgan Stanley Dean Witter New York Municipal Money Market Trust
(43)    Morgan Stanley Dean Witter New York Tax-Free Income Fund
(44)    Morgan Stanley Dean Witter North American Government Income Trust
(45)    Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(46)    Morgan Stanley Dean Witter Precious Metals and Minerals Trust
(47)    Morgan Stanley Dean Witter Prime Income Trust
(48)    Morgan Stanley Dean Witter Real Estate Fund
(49)    Morgan Stanley Dean Witter S&P 500 Index Fund
(50)    Morgan Stanley Dean Witter S&P 500 Select Fund
(51)    Morgan Stanley Dean Witter Short-Term Bond Fund
(52)    Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(53)    Morgan Stanley Dean Witter Small Cap Growth Fund



<PAGE>


(54)    Morgan Stanley Dean Witter Special Value Fund
(55)    Morgan Stanley Dean Witter Strategist Fund
(56)    Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(57)    Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(58)    Morgan Stanley Dean Witter Total Return Trust
(59)    Morgan Stanley Dean Witter U.S. Government Money Market Trust
(60)    Morgan Stanley Dean Witter U.S. Government Securities Trust
(61)    Morgan Stanley Dean Witter Utilities Fund
(62)    Morgan Stanley Dean Witter Value-Added Market Series
(63)    Morgan Stanley Dean Witter Value Fund
(64)    Morgan Stanley Dean Witter Variable Investment Series
(65)    Morgan Stanley Dean Witter World Wide Income Trust

(b) The following information is given regarding directors and officers of MSDW
Distributors not listed in Item 26 above. The principal address of MSDW
Distributors is Two World Trade Center, New York, New York 10048. Other than Mr.
Purcell, who is a Trustee of the Registrant, none of the following persons has
any position or office with the Registrant.

Name                       Positions and Office with MSDW Distributors
- ----                       -------------------------------------------

Michael T. Gregg           Vice President and Assistant Secretary.

James F. Higgins           Director

Fredrick K. Kubler         Senior Vice President, Assistant Secretary and Chief
                           Compliance  Officer.

Philip J. Purcell          Director

John Schaeffer             Director

Charles Vadala             Senior Vice President and Financial Principal.

Item 28.        Location of Accounts and Records
                --------------------------------

      All accounts, books and other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder are
maintained by the Investment Manager at its offices, except records relating to
holders of shares issued by the Registrant, which are maintained by the
Registrant's Transfer Agent, at its place of business as shown in the
prospectus.

Item 29.        Management Services
                -------------------

      Registrant is not a party to any such management-related service contract.

Item 30.        Undertakings
                ------------

         Registrant hereby undertakes to furnish each person to whom a
prospectus is delivered with a copy of the Registrant's latest annual report to
shareholders, upon request and without charge.



<PAGE>

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it has duly caused
this Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 29th day of July, 1999.

                MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST

                                         By  /s/ Barry Fink
                                             ---------------------------------
                                                 Barry Fink
                                                 Vice President and Secretary

         Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 9 has been signed below by the following persons in
the capacities and on the dates indicated.

<TABLE>
<CAPTION>
         Signatures                                  Title                                                  Date
         ----------                                  -----                                                  -----
<S>                                         <C>                                                          <C>
(1) Principal Executive Officer             Chief Executive Officer,
                                            Trustee and Chairman
By /s/Charles A. Fiumefreddo                                                                               07/29/99
   -------------------------
      Charles A. Fiumefreddo

(2) Principal Financial Officer             Treasurer and Principal
                                            Accounting Officer

By   /s/Thomas F. Caloia                                                                                   07/29/99
     -------------------
        Thomas F. Caloia

(3) Majority of the Trustees

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell

By  /s/Barry Fink                                                                                          07/29/99
    --------------------------
       Barry Fink
       Attorney-in-Fact

    Michael Bozic          Manuel H. Johnson
    Edwin J. Garn          Michael E. Nugent
    Wayne E. Hedien        John L. Schroeder


By  /s/David M. Butowsky                                                                                   07/29/99
    ---------------------
       David M. Butowsky
       Attorney-in-Fact

</TABLE>

<PAGE>

                MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST
                                  EXHIBIT INDEX

2.       Amended and Restated By-Laws of the Registrant dated May 1, 1999.

5(b).    Omnibus Selected Dealer Agreement between Morgan Stanley Dean Witter
         Distributors and National Financial Services Corporation, dated
         October 17, 1998.

6.       Amended Retirement Plan for Non-Interested Trustees or Directors,
         dated May 8, 1997.

9(a).    Opinion of Sheldon Curtis, Esq., dated August 17, 1992.

9(b.).   Opinion of Lane, Altman & Owens LLP, Massachusetts Counsel, dated
         August 18, 1992.









<PAGE>
                                     BY-LAWS

                                       OF

                MORGAN STANLEY DEAN WITTER HEALTH SCIENCES TRUST

                     AMENDED AND RESTATED AS OF MAY 1, 1999

                                    ARTICLE I

                                   DEFINITIONS

   The terms "Commission," "Declaration," "Distributor," "Investment
Adviser," "Majority Shareholder Vote," "1940 Act," "Shareholder," "Shares,"
"Transfer Agent," "Trust," "Trust Property," and "Trustees" have the
respective meanings given them in the Declaration of Trust of Morgan Stanley
Dean Witter Health Sciences Trust dated May 26, 1992, as amended from time to
time.

                                   ARTICLE II

                                     OFFICES

   SECTION 2.1. Principal Office. Until changed by the Trustees, the
principal office of the Trust in the Commonwealth of Massachusetts shall be
in the City of Boston, County of Suffolk.

   SECTION 2.2. Other Offices. In addition to its principal office in the
Commonwealth of Massachusetts, the Trust may have an office or offices in the
City of New York, State of New York, and at such other places within and
without the Commonwealth as the Trustees may from time to time designate or
the business of the Trust may require.

                                   ARTICLE III

                             SHAREHOLDERS' MEETINGS

   SECTION 3.1. Place of Meetings. Meetings of Shareholders shall be held at
such place, within or without the Commonwealth of Massachusetts, as may be
designated from time to time by the Trustees.

   SECTION 3.2. Meetings. Meetings of Shareholders of the Trust shall be held
whenever called by the Trustees or the President of the Trust and whenever
election of a Trustee or Trustees by Shareholders is required by the
provisions of Section 16(a) of the 1940 Act, for that purpose. Meetings of
Shareholders shall also be called by the Secretary upon the written request
of the holders of Shares entitled to vote not less than twenty-five percent
(25%) of all the votes entitled to be cast at such meeting, except to the
extent otherwise required by Section 16(c) of the 1940 Act, as made
applicable to the Trust by the provisions of Section 2.3 of the Declaration.
Such request shall state the purpose or purposes of such meeting and the
matters proposed to be acted on thereat. Except to the extent otherwise
required by Section 16(c) of the 1940 Act, as made applicable to the Trust by
the provisions of Section 2.3 of the Declaration, the Secretary shall inform
such Shareholders of the reasonable estimated cost of preparing and mailing
such notice of the meeting, and upon payment to the Trust of such costs, the
Secretary shall give notice stating the purpose or purposes of the meeting to
all entitled to vote at such meeting. No meeting need be called upon the
request of the holders of Shares entitled to cast less than a majority of all
votes entitled to be cast at such meeting, to consider any matter which is
substantially the same as a matter voted upon at any meeting of Shareholders
held during the preceding twelve months.

   SECTION 3.3. Notice of Meetings. Written or printed notice of every
Shareholders' meeting stating the place, date, and purpose or purposes
thereof, shall be given by the Secretary not less than ten (10) nor more than
ninety (90) days before such meeting to each Shareholder entitled to vote at
such meeting. Such notice shall be deemed to be given when deposited in the
United States mail, postage prepaid, directed to the Shareholder at his
address as it appears on the records of the Trust.


<PAGE>

   SECTION 3.4 Quorum and Adjournment of Meetings. Except as otherwise
provided by law, by the Declaration or by these By-Laws, at all meetings of
Shareholders, the holders of a majority of the Shares issued and outstanding
and entitled to vote thereat, present in person or represented by proxy,
shall be requisite and shall constitute a quorum for the transaction of
business. In the absence of a quorum, the Shareholders present or represented
by proxy and entitled to vote thereat shall have the power to adjourn the
meeting from time to time. The Shareholders present in person or represented
by proxy at any meeting and entitled to vote thereat also shall have the
power to adjourn the meeting from time to time if the vote required to
approve or reject any proposal described in the original notice of such
meeting is not obtained (with proxies being voted for or against adjournment
consistent with the votes for and against the proposal for which the required
vote has not been obtained). The affirmative vote of the holders of a
majority of the Shares then present in person or represented by proxy shall
be required to adjourn any meeting. Any adjourned meeting may be reconvened
without further notice or change in record date. At any reconvened meeting at
which a quorum shall be present, any business may be transacted that might
have been transacted at the meeting as originally called.

   SECTION 3.5. Voting Rights, Proxies. At each meeting of Shareholders, each
holder of record of Shares entitled to vote thereat shall be entitled to one
vote in person or by proxy for each Share of beneficial interest of the Trust
and for the fractional portion of one vote for each fractional Share entitled
to vote so registered in his or her name on the records of the Trust on the
date fixed as the record date for the determination of Shareholders entitled
to vote at such meeting. Without limiting the manner in which a Shareholder
may authorize another person or persons to act for such Shareholder as proxy
pursuant hereto, the following shall constitute a valid means by which a
Shareholder may grant such authority:

       (i) A Shareholder may execute a writing authorizing another person or
       persons to act for such Shareholder as proxy. Execution may be
       accomplished by the Shareholder or such Shareholder's authorized
       officer, director, employee, attorney-in-fact or another agent signing
       such writing or causing such person's signature to be affixed to such
       writing by any reasonable means including, but not limited to, by
       facsimile or telecopy signature. No written evidence of authority of a
       Shareholder's authorized officer, director, employee, attorney-in-fact
       or other agent shall be required; and

       (ii) A Shareholder may authorize another person or persons to act for
       such Shareholder as proxy by transmitting or authorizing the
       transmission of a telegram or cablegram or by other means of
       telephonic, electronic or computer transmission to the person who will
       be the holder of the proxy or to a proxy solicitation firm, proxy
       support service organization or like agent duly authorized by the
       person who will be the holder of the proxy to receive such
       transmission, provided that any such telegram or cablegram or other
       means of telephonic, electronic or computer transmission must either
       set forth or be submitted with information from which it can be
       determined that the telegram, cablegram or other transmission was
       authorized by the Shareholder.

No proxy shall be valid after eleven months from its date, unless otherwise
provided in the proxy. At all meetings of Shareholders, unless the voting is
conducted by inspectors, all questions relating to the qualification of
voters and the validity of proxies and the acceptance or rejection of votes
shall be decided by the chairman of the meeting. In determining whether a
telegram, cablegram or other electronic transmission is valid, the chairman
or inspector, as the case may be, shall specify the information upon which he
or she relied. Pursuant to a resolution of a majority of the Trustees,
proxies may be solicited in the name of one or more Trustees or Officers of
the Trust. Proxy solicitations may be made in writing or by using telephonic
or other electronic solicitation procedures that include appropriate methods
of verifying the identity of the Shareholder and confirming any instructions
given thereby.

   SECTION 3.6. Vote Required. Except as otherwise provided by law, by the
Declaration of Trust, or by these By-Laws, at each meeting of Shareholders at
which a quorum is present, all matters shall be decided by Majority
Shareholder Vote.

   SECTION 3.7. Inspectors of Election. In advance of any meeting of
Shareholders, the Trustees may appoint Inspectors of Election to act at the
meeting or any adjournment thereof. If Inspectors of Election are not so
appointed, the chairman of any meeting of Shareholders may, and on the
request of any

                                        2
<PAGE>

Shareholder or his proxy shall, appoint Inspectors of Election of the
meeting. In case any person appointed as Inspector fails to appear or fails
or refuses to act, the vacancy may be filled by appointment made by the
Trustees in advance of the convening of the meeting or at the meeting by the
person acting as chairman. The Inspectors of Election shall determine the
number of Shares outstanding, the Shares represented at the meeting, the
existence of a quorum, the authenticity, validity and effect of proxies,
shall receive votes, ballots or consents, shall hear and determine all
challenges and questions in any way arising in connection with the right to
vote, shall count and tabulate all votes or consents, determine the results,
and do such other acts as may be proper to conduct the election or vote with
fairness to all Shareholders. On request of the chairman of the meeting, or
of any Shareholder or his proxy, the Inspectors of Election shall make a
report in writing of any challenge or question or matter determined by them
and shall execute a certificate of any facts found by them.

   SECTION 3.8. Inspection of Books and Records. Shareholders shall have such
rights and procedures of inspection of the books and records of the Trust as
are granted to Shareholders under Section 32 of the Business Corporation Law
of the Commonwealth of Massachusetts.

   SECTION 3.9. Action by Shareholders Without Meeting. Except as otherwise
provided by law, the provisions of these By-Laws relating to notices and
meetings to the contrary notwithstanding, any action required or permitted to
be taken at any meeting of Shareholders may be taken without a meeting if a
majority of the Shareholders entitled to vote upon the action consent to the
action in writing and such consents are filed with the records of the Trust.
Such consent shall be treated for all purposes as a vote taken at a meeting
of Shareholders.

   SECTION 3.10. Presence at Meetings. Presence at meetings of shareholders
requires physical attendance by the shareholder or his or her proxy at the
meeting site and does not encompass attendance by telephonic or other
electronic means.

                                   ARTICLE IV

                                    TRUSTEES

   SECTION 4.1. Meetings of the Trustees. The Trustees may in their
discretion provide for regular or special meetings of the Trustees. Regular
meetings of the Trustees may be held at such time and place as shall be
determined from time to time by the Trustees without further notice. Special
meetings of the Trustees may be called at any time by the Chairman and shall
be called by the Chairman or the Secretary upon the written request of any
two (2) Trustees.

   SECTION 4.2. Notice of Special Meetings. Written notice of special
meetings of the Trustees, stating the place, date and time thereof, shall be
given not less than two (2) days before such meeting to each Trustee,
personally, by telegram, by mail, or by leaving such notice at his place of
residence or usual place of business. If mailed, such notice shall be deemed
to be given when deposited in the United States mail, postage prepaid,
directed to the Trustee at his address as it appears on the records of the
Trust. Subject to the provisions of the 1940 Act, notice or waiver of notice
need not specify the purpose of any special meeting.

   SECTION 4.3. Telephone Meetings. Subject to the provisions of the 1940
Act, any Trustee, or any member or members of any committee designated by the
Trustees, may participate in a meeting of the Trustees, or any such
committee, as the case may be, by means of a conference telephone or similar
communications equipment if all persons participating in the meeting can hear
each other at the same time. Participation in a meeting by these means
constitutes presence in person at the meeting.

   SECTION 4.4. Quorum, Voting and Adjournment of Meetings. At all meetings
of the Trustees, a majority of the Trustees shall be requisite to and shall
constitute a quorum for the transaction of business. If a quorum is present,
the affirmative vote of a majority of the Trustees present shall be the act
of the Trustees, unless the concurrence of a greater proportion is expressly
required for such action by law, the Declaration or these By-Laws. If at any
meeting of the Trustees there be less than a quorum present, the Trustees
present thereat may adjourn the meeting from time to time, without notice
other than announcement at the meeting, until a quorum shall have been
obtained.

                                        3
<PAGE>

   SECTION 4.5. Action by Trustees Without Meeting. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required or permitted to be taken at
any meeting of the Trustees may be taken without a meeting if a consent in
writing setting forth the action shall be signed by all of the Trustees
entitled to vote upon the action and such written consent is filed with the
minutes of proceedings of the Trustees.

   SECTION 4.6. Expenses and Fees. Each Trustee may be allowed expenses, if
any, for attendance at each regular or special meeting of the Trustees, and
each Trustee who is not an officer or employee of the Trust or of its
investment manager or underwriter or of any corporate affiliate of any of
said persons shall receive for services rendered as a Trustee of the Trust
such compensation as may be fixed by the Trustees. Nothing herein contained
shall be construed to preclude any Trustee from serving the Trust in any
other capacity and receiving compensation therefor.

   SECTION 4.7.  Execution of Instruments and Documents and Signing of Checks
and Other Obligations and Transfers. All instruments, documents and other
papers shall be executed in the name and on behalf of the Trust and all
checks, notes, drafts and other obligations for the payment of money by the
Trust shall be signed, and all transfer of securities standing in the name of
the Trust shall be executed, by the Chairman, the President, any Vice
President or the Treasurer or by any one or more officers or agents of the
Trust as shall be designated for that purpose by vote of the Trustees;
notwithstanding the above, nothing in this Section 4.7 shall be deemed to
preclude the electronic authorization, by designated persons, of the Trust's
Custodian (as described herein in Section 9.1) to transfer assets of the
Trust, as provided for herein in Section 9.1.

   SECTION 4.8. Indemnification of Trustees, Officers, Employees and
Agents. (a) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending, or completed
action, suit or proceeding, whether civil, criminal, administrative or
investigative (other than an action by or in the right of the Trust) by
reason of the fact that he is or was a Trustee, officer, employee, or agent
of the Trust. The indemnification shall be against expenses, including
attorneys' fees, judgments, fines, and amounts paid in settlement, actually
and reasonably incurred by him in connection with the action, suit, or
proceeding, if he acted in good faith and in a manner he reasonably believed
to be in or not opposed to the best interests of the Trust, and, with respect
to any criminal action or proceeding, had no reasonable cause to believe his
conduct was unlawful. The termination of any action, suit or proceeding by
judgment, order, settlement, conviction, or upon a plea of nolo contendere or
its equivalent, shall not, of itself, create a presumption that the person
did not act in good faith and in a manner which he reasonably believed to be
in or not opposed to the best interests of the Trust, and, with respect to
any criminal action or proceeding, had reasonable cause to believe that his
conduct was unlawful.

   (b) The Trust shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action
or suit by or on behalf of the Trust to obtain a judgment or decree in its
favor by reason of the fact that he is or was a Trustee, officer, employee,
or agent of the Trust. The indemnification shall be against expenses,
including attorneys' fees actually and reasonably incurred by him in
connection with the defense or settlement of the action or suit, if he acted
in good faith and in a manner he reasonably believed to be in or not opposed
to the best interests of the Trust; except that no indemnification shall be
made in respect of any claim, issue, or matter as to which the person has
been adjudged to be liable for negligence or misconduct in the performance of
his duty to the Trust, except to the extent that the court in which the
action or suit was brought, or a court of equity in the county in which the
Trust has its principal office, determines upon application that, despite the
adjudication of liability but in view of all circumstances of the case, the
person is fairly and reasonably entitled to indemnity for those expenses
which the court shall deem proper, provided such Trustee, officer, employee
or agent is not adjudged to be liable by reason of his willful misfeasance,
bad faith, gross negligence or reckless disregard of the duties involved in
the conduct of his office.

   (c) To the extent that a Trustee, officer, employee, or agent of the Trust
has been successful on the merits or otherwise in defense of any action, suit
or proceeding referred to in subsection (a) or (b) or in defense of any
claim, issue or matter therein, he shall be indemnified against expenses,
including attorneys' fees, actually and reasonably incurred by him in
connection therewith.

                                        4
<PAGE>

   (d) (1) Unless a court orders otherwise, any indemnification under
subsections (a) or (b) of this section may be made by the Trust only as
authorized in the specific case after a determination that indemnification of
the Trustee, officer, employee, or agent is proper in the circumstances
because he has met the applicable standard of conduct set forth in
subsections (a) or (b).

       (2) The determination shall be made:

       (i) By the Trustees, by a majority vote of a quorum which consists of
    Trustees who were not parties to the action, suit or proceeding; or

      (ii) If the required quorum is not obtainable, or if a quorum of
    disinterested Trustees so directs, by independent legal counsel in a
    written opinion; or

     (iii) By the Shareholders.

     (3) Notwithstanding any provision of this Section 4.8, no person shall
    be entitled to indemnification for any liability, whether or not there is
    an adjudication of liability, arising by reason of willful misfeasance,
    bad faith, gross negligence, or reckless disregard of duties as described
    in Section 17(h) and (i) of the Investment Company Act of 1940
    ("disabling conduct"). A person shall be deemed not liable by reason of
    disabling conduct if, either:

       (i) a final decision on the merits is made by a court or other body
    before whom the proceeding was brought that the person to be indemnified
    ("indemnitee") was not liable by reason of disabling conduct; or

      (ii) in the absence of such a decision, a reasonable determination,
    based upon a review of the facts, that the indemnitee was not liable by
    reason of disabling conduct, is made by either--

          (A) a majority of a quorum of Trustees who are neither "interested
         persons" of the Trust, as defined in Section 2(a)(19) of the
         Investment Company Act of 1940, nor parties to the action, suit or
         proceeding, or

          (B) an independent legal counsel in a written opinion.

   (e) Expenses, including attorneys' fees, incurred by a Trustee, officer,
employee or agent of the Trust in defending a civil or criminal action, suit
or proceeding may be paid by the Trust in advance of the final disposition
thereof if:

        (1) authorized in the specific case by the Trustees; and

        (2) the Trust receives an undertaking by or on behalf of the Trustee,
    officer, employee or agent of the Trust to repay the advance if it is not
    ultimately determined that such person is entitled to be indemnified by
    the Trust; and

        (3) either, (i) such person provides a security for his undertaking,
    or

           (ii) the Trust is insured against losses by reason of any lawful
         advances, or

          (iii) a determination, based on a review of readily available
         facts, that there is reason to believe that such person ultimately
         will be found entitled to indemnification, is made by either--

              (A) a majority of a quorum which consists of Trustees who are
             neither "interested persons" of the Trust, as defined in Section
             2(a)(19) of the 1940 Act, nor parties to the action, suit or
             proceeding, or

              (B) an independent legal counsel in a written opinion.

   (f) The indemnification provided by this Section shall not be deemed
exclusive of any other rights to which a person may be entitled under any
by-law, agreement, vote of Shareholders or disinterested Trustees or
otherwise, both as to action in his official capacity and as to action in
another capacity while holding the office, and shall continue as to a person
who has ceased to be a Trustee, officer, employee, or agent and inure to the
benefit of the heirs, executors and administrators of such person; provided
that no

                                        5
<PAGE>

person may satisfy any right of indemnity or reimbursement granted herein or
to which he may be otherwise entitled except out of the property of the
Trust, and no Shareholder shall be personally liable with respect to any
claim for indemnity or reimbursement or otherwise.

   (g) The Trust may purchase and maintain insurance on behalf of any person
who is or was a Trustee, officer, employee, or agent of the Trust, against
any liability asserted against him and incurred by him in any such capacity,
or arising out of his status as such. However, in no event will the Trust
purchase insurance to indemnify any officer or Trustee against liability for
any act for which the Trust itself is not permitted to indemnify him.

   (h) Nothing contained in this Section shall be construed to protect any
Trustee or officer of the Trust against any liability to the Trust or to its
security holders to which he would otherwise be subject by reason of willful
misfeasance, bad faith, gross negligence or reckless disregard of the duties
involved in the conduct of his office.

                                    ARTICLE V

                                   COMMITTEES

   SECTION 5.1. Executive and Other Committees. The Trustees, by resolution
adopted by a majority of the Trustees, may designate an Executive Committee
and/or committees, each committee to consist of two (2) or more of the
Trustees of the Trust and may delegate to such committees, in the intervals
between meetings of the Trustees, any or all of the powers of the Trustees in
the management of the business and affairs of the Trust. In the absence of
any member of any such committee, the members thereof present at any meeting,
whether or not they constitute a quorum, may appoint a Trustee to act in
place of such absent member. Each such committee shall keep a record of its
proceedings.

   The Executive Committee and any other committee shall fix its own rules or
procedure, but the presence of at least fifty percent (50%) of the members of
the whole committee shall in each case be necessary to constitute a quorum of
the committee and the affirmative vote of the majority of the members of the
committee present at the meeting shall be necessary to take action.

   All actions of the Executive Committee shall be reported to the Trustees
at the meeting thereof next succeeding to the taking of such action.

   SECTION 5.2. Advisory Committee. The Trustees may appoint an advisory
committee which shall be composed of persons who do not serve the Trust in
any other capacity and which shall have advisory functions with respect to
the investments of the Trust but which shall have no power to determine that
any security or other investment shall be purchased, sold or otherwise
disposed of by the Trust. The number of persons constituting any such
advisory committee shall be determined from time to time by the Trustees. The
members of any such advisory committee may receive compensation for their
services and may be allowed such fees and expenses for the attendance at
meetings as the Trustees may from time to time determine to be appropriate.

   SECTION 5.3. Committee Action Without Meeting. The provisions of these
By-Laws covering notices and meetings to the contrary notwithstanding, and
except as required by law, any action required or permitted to be taken at
any meeting of any Committee of the Trustees appointed pursuant to Section
5.1 of these By-Laws may be taken without a meeting if a consent in writing
setting forth the action shall be signed by all members of the Committee
entitled to vote upon the action and such written consent is filed with the
records of the proceedings of the Committee.

                                   ARTICLE VI

                                    OFFICERS

   SECTION 6.1. Executive Officers. The executive officers of the Trust shall
be a Chairman, a President, one or more Vice Presidents, a Secretary and a
Treasurer. The Chairman shall be selected from among the Trustees but none of
the other executive officers need be a Trustee. Two or more offices, except
those of President and any Vice President, may be held by the same person,
but no officer shall execute,

                                        6
<PAGE>

acknowledge or verify any instrument in more than one capacity. The executive
officers of the Trust shall be elected annually by the Trustees and each
executive officer so elected shall hold office until his or her successor is
elected and has qualified.

   SECTION 6.2. Other Officers and Agents. The Trustees may also elect one or
more Assistant Vice Presidents, Assistant Secretaries and Assistant
Treasurers and may elect, or may delegate to the Chairman the power to
appoint, such other officers and agents as the Trustees shall at any time or
from time to time deem advisable.

   SECTION 6.3. Term and Removal and Vacancies. Each officer of the Trust
shall hold office until his or her successor is elected and has qualified.
Any officer or agent of the Trust may be removed by the Trustees whenever, in
their judgment, the best interests of the Trust will be served thereby, but
such removal shall be without prejudice to the contractual rights, if any, of
the person so removed.

   SECTION 6.4. Compensation of Officers. The compensation of officers and
agents of the Trust shall be fixed by the Trustees, or by the Chairman to the
extent provided by the Trustees with respect to officers appointed by the
Chairman.

   SECTION 6.5. Powers and Duties. All officers and agents of the Trust, as
between themselves and the Trust, shall have such authority and perform such
duties in the management of the Trust as may be provided in or pursuant to
these By-Laws or, to the extent not so provided, as may be prescribed by the
Trustees; provided that no rights of any third party shall be affected or
impaired by any such By-Law or resolution of the Trustees unless such third
party has knowledge thereof.

   SECTION 6.6. The Chairman. The Chairman shall be the chief executive
officer of the Trust, shall preside at all meetings of the Shareholders and
of the Trustees, shall have general and active management of the business of
the Trust, shall see that all orders and resolutions of the Trustees are
carried into effect and, in connection therewith, shall be authorized to
delegate to the President or to one or more Vice Presidents such of his or
her powers and duties at such times and in such manner as he or she may deem
advisable, shall be a signatory on all Annual and Semi-Annual Reports as may
be sent to Shareholders, and shall perform such other duties as the Trustees
may from time to time prescribe.

   SECTION 6.7. The President. The President shall perform such duties as the
Trustees and the Chairman may from time to time prescribe and shall, in the
absence or disability of the Chairman, exercise the powers and perform the
duties of the Chairman. The President shall be authorized to delegate to one
or more Vice Presidents such of his or her powers and duties at such times
and in such manner as he or she may deem advisable.

   SECTION 6.8. The Vice Presidents. The Vice Presidents shall be of such
number and shall have such titles as may be determined from time to time by
the Trustees. The Vice President, or, if there shall be more than one, the
Vice Presidents in such order as may be determined from time to time by the
Trustees or the Chairman, shall, in the absence or disability of the
President, exercise the powers and perform the duties of the President, and
shall perform such other duties as the Trustees or the Chairman may from time
to time prescribe.

   SECTION 6.9. The Assistant Vice Presidents. The Assistant Vice President,
or, if there shall be more than one, the Assistant Vice Presidents in such
order as may be determined from time to time by the Trustees or the Chairman,
shall perform such duties and have such powers as may be assigned them from
time to time by the Trustees or the Chairman.

   SECTION 6.10. The Secretary. The Secretary shall attend all meetings of
the Trustees and all meetings of the Shareholders and record all the
proceedings of the meetings of the Shareholders and of the Trustees in a book
to be kept for that purpose, and shall perform like duties for the standing
committees when required. He or she shall give, or cause to be given, notice
of all meetings of the Shareholders and special meetings of the Trustees, and
shall perform such other duties and have such powers as the Trustees or the
Chairman may from time to time prescribe. He or she shall keep in safe
custody the seal of the Trust and affix or cause the same to be affixed to
any instrument requiring it, and, when so affixed, it shall be attested by
his or her signature or by the signature of an Assistant Secretary.

                                        7
<PAGE>

   SECTION 6.11. The Assistant Secretaries. The Assistant Secretary, or, if
there shall be more than one, the Assistant Secretaries in such order as may
be determined from time to time by the Trustees or the Chairman, shall, in
the absence or disability of the Secretary, perform the duties and exercise
the powers of the Secretary and shall perform such duties and have such other
powers as the Trustees or the Chairman may from time to time prescribe.

   SECTION 6.12. The Treasurer. The Treasurer shall be the chief financial
officer of the Trust. He or she shall keep or cause to be kept full and
accurate accounts of receipts and disbursements in books belonging to the
Trust, and he or she shall render to the Trustees and the Chairman, whenever
any of them require it, an account of his or her transactions as Treasurer
and of the financial condition of the Trust, and he or she shall perform such
other duties as the Trustees or the Chairman may from time to time prescribe.

   SECTION 6.13. The Assistant Treasurers. The Assistant Treasurer, or, if
there shall be more than one, the Assistant Treasurers in such order as may
be determined from time to time by the Trustees or the Chairman, shall, in
the absence or disability of the Treasurer, perform the duties and exercise
the powers of the Treasurer and shall perform such other duties and have such
other powers as the Trustees or the Chairman may from time to time prescribe.

   SECTION 6.14. Delegation of Duties. Whenever an officer is absent or
disabled, or whenever for any reason the Trustees may deem it desirable, the
Trustees may delegate the powers and duties of an officer or officers to any
other officer or officers or to any Trustee or Trustees.

                                   ARTICLE VII

                           DIVIDENDS AND DISTRIBUTIONS

   Subject to any applicable provisions of law and the Declaration, dividends
and distributions upon the Shares may be declared at such intervals as the
Trustees may determine, in cash, in securities or other property, or in
Shares, from any sources permitted by law, all as the Trustees shall from
time to time determine.

   Inasmuch as the computation of net income and net profits from the sales
of securities or other properties for federal income tax purposes may vary
from the computation thereof on the records of the Trust, the Trustees shall
have power, in their discretion, to distribute as income dividends and as
capital gain distributions, respectively, amounts sufficient to enable the
Trust to avoid or reduce liability for federal income taxes.

                                  ARTICLE VIII

                             CERTIFICATES OF SHARES

   SECTION 8.1. Certificates of Shares. Certificates for Shares of each
series or class of Shares shall be in such form and of such design as the
Trustees shall approve, subject to the right of the Trustees to change such
form and design at any time or from time to time, and shall be entered in the
records of the Trust as they are issued. Each such certificate shall bear a
distinguishing number; shall exhibit the holder's name and certify the number
of full Shares owned by such holder; shall be signed by or in the name of the
Trust by the Chairman, the President, or a Vice President, and countersigned
by the Secretary or an Assistant Secretary or the Treasurer and an Assistant
Treasurer of the Trust; shall be sealed with the seal; and shall contain such
recitals as may be required by law. Where any certificate is signed by a
Transfer Agent or by a Registrar, the signature of such officers and the seal
may be facsimile, printed or engraved. The Trust may, at its option,
determine not to issue a certificate or certificates to evidence Shares owned
of record by any Shareholder.

   In case any officer or officers who shall have signed, or whose facsimile
signature or signatures shall appear on, any such certificate or certificates
shall cease to be such officer or officers of the Trust, whether because of
death, resignation or otherwise, before such certificate or certificates
shall have been delivered by the Trust, such certificate or certificates
shall, nevertheless, be adopted by the Trust and be issued and

                                        8
<PAGE>

delivered as though the person or persons who signed such certificate or
certificates or whose facsimile signature or signatures shall appear therein
had not ceased to be such officer or officers of the Trust.

   No certificate shall be issued for any share until such share is fully
paid.

   SECTION 8.2. Lost, Stolen, Destroyed and Mutilated Certificates. The
Trustees may direct a new certificate or certificates to be issued in place
of any certificate or certificates theretofore issued by the Trust alleged to
have been lost, stolen or destroyed, upon satisfactory proof of such loss,
theft, or destruction; and the Trustees may, in their discretion, require the
owner of the lost, stolen or destroyed certificate, or his legal
representative, to give to the Trust and to such Registrar, Transfer Agent
and/or Transfer Clerk as may be authorized or required to countersign such
new certificate or certificates, a bond in such sum and of such type as they
may direct, and with such surety or sureties, as they may direct, as
indemnity against any claim that may be against them or any of them on
account of or in connection with the alleged loss, theft or destruction of
any such certificate.

                                   ARTICLE IX

                                    CUSTODIAN

   SECTION 9.1. Appointment and Duties. The Trust shall at times employ a
bank or trust company having capital, surplus and undivided profits of at
least five million dollars ($5,000,000) as custodian with authority as its
agent, but subject to such restrictions, limitations and other requirements,
if any, as may be contained in these By-Laws and the 1940 Act:

     (1) to receive and hold the securities owned by the Trust and deliver
    the same upon written or electronically transmitted order;

     (2) to receive and receipt for any moneys due to the Trust and deposit
    the same in its own banking department or elsewhere as the Trustees may
    direct;

     (3) to disburse such funds upon orders or vouchers;

all upon such basis of compensation as may be agreed upon between the
Trustees and the custodian. If so directed by a Majority Shareholder Vote,
the custodian shall deliver and pay over all property of the Trust held by it
as specified in such vote.

   The Trustees may also authorize the custodian to employ one or more
sub-custodians from time to time to perform such of the acts and services of
the custodian and upon such terms and conditions as may be agreed upon
between the custodian and such sub-custodian and approved by the Trustees.

   SECTION 9.2. Central Certificate System. Subject to such rules,
regulations and orders as the Commission may adopt, the Trustees may direct
the custodian to deposit all or any part of the securities owned by the Trust
in a system for the central handling of securities established by a national
securities exchange or a national securities association registered with the
Commission under the Securities Exchange Act of 1934, or such other person as
may be permitted by the Commission, or otherwise in accordance with the 1940
Act, pursuant to which system all securities of any particular class or
series of any issuer deposited within the system are treated as fungible and
may be transferred or pledged by bookkeeping entry without physical delivery
of such securities, provided that all such deposits shall be subject to
withdrawal only upon the order of the Trust.

                                    ARTICLE X

                                WAIVER OF NOTICE

   Whenever any notice of the time, place or purpose of any meeting of
Shareholders, Trustees, or of any committee is required to be given in
accordance with law or under the provisions of the Declaration or these
By-Laws, a waiver thereof in writing, signed by the person or persons
entitled to such notice and filed with the records of the meeting, whether
before or after the holding thereof, or actual attendance at the meeting of
shareholders, Trustees or committee, as the case may be, in person, shall be
deemed equivalent to the giving of such notice to such person.

                                        9
<PAGE>
                                   ARTICLE XI

                                  MISCELLANEOUS

   SECTION 11.1. Location of Books and Records. The books and records of the
Trust may be kept outside the Commonwealth of Massachusetts at such place or
places as the Trustees may from time to time determine, except as otherwise
required by law.

   SECTION 11.2 Record Date. The Trustees may fix in advance a date as the
record date for the purpose of determining the Shareholders entitled to (i)
receive notice of, or to vote at, any meeting of Shareholders, or (ii)
receive payment of any dividend or the allotment of any rights, or in order
to make a determination of Shareholders for any other proper purpose. The
record date, in any case, shall not be more than one hundred eighty (180)
days, and in the case of a meeting of Shareholders not less than ten (10)
days, prior to the date on which such meeting is to be held or the date on
which such other particular action requiring determination of Shareholders is
to be taken, as the case may be. In the case of a meeting of Shareholders,
the meeting date set forth in the notice to Shareholders accompanying the
proxy statement shall be the date used for purposes of calculating the 180
day or 10 day period, and any adjourned meeting may be reconvened without a
change in record date. In lieu of fixing a record date, the Trustees may
provide that the transfer books shall be closed for a stated period but not
to exceed, in any case, twenty (20) days. If the transfer books are closed
for the purpose of determining Shareholders entitled to notice of a vote at a
meeting of Shareholders, such books shall be closed for at least ten (10)
days immediately preceding the meeting.

   SECTION 11.3. Seal. The Trustees shall adopt a seal, which shall be in
such form and shall have such inscription thereon as the Trustees may from
time to time provide. The seal of the Trust may be affixed to any document,
and the seal and its attestation may be lithographed, engraved or otherwise
printed on any document with the same force and effect as if it had been
imprinted and attested manually in the same manner and with the same effect
as if done by a Massachusetts business corporation under Massachusetts law.

   SECTION 11.4. Fiscal Year. The fiscal year of the Trust shall end on such
date as the Trustees may by resolution specify, and the Trustees may by
resolution change such date for future fiscal years at any time and from time
to time.

   SECTION 11.5. Orders for Payment of Money. All orders or instructions for
the payment of money of the Trust, and all notes or other evidences of
indebtedness issued in the name of the Trust, shall be signed by such officer
or officers or such other person or persons as the Trustees may from time to
time designate, or as may be specified in or pursuant to the agreement
between the Trust and the bank or trust company appointed as Custodian of the
securities and funds of the Trust.

                                   ARTICLE XII

                       COMPLIANCE WITH FEDERAL REGULATIONS

   The Trustees are hereby empowered to take such action as they may deem to
be necessary, desirable or appropriate so that the Trust is or shall be in
compliance with any federal or state statute, rule or regulation with which
compliance by the Trust is required.

                                  ARTICLE XIII

                                   AMENDMENTS

   These By-Laws may be amended, altered, or repealed, or new By-Laws may be
adopted, (a) by a Majority Shareholder Vote, or (b) by the Trustees;
provided, however, that no By-Law may be amended, adopted or repealed by the
Trustees if such amendment, adoption or repeal requires, pursuant to law, the
Declaration, or these By-Laws, a vote of the Shareholders. The Trustees shall
in no event adopt By-Laws which are in conflict with the Declaration, and any
apparent inconsistency shall be construed in favor of the related provisions
in the Declaration.

                                       10
<PAGE>
                                   ARTICLE XIV

                              DECLARATION OF TRUST

   The Declaration of Trust establishing Morgan Stanley Dean Witter Health
Sciences Trust, dated May 26, 1992, a copy of which, together with all
amendments thereto, is on file in the office of the Secretary of the
Commonwealth of Massachusetts, provides that the name Morgan Stanley Dean
Witter Health Sciences Trust refers to the Trustees under the Declaration
collectively as Trustees, but not as individuals or personally; and no
Trustee, Shareholder, officer, employee or agent of Morgan Stanley Dean
Witter Health Sciences Trust shall be held to any personal liability, nor
shall resort be had to their private property for the satisfaction of any
obligation or claim or otherwise, in connection with the affairs of said
Morgan Stanley Dean Witter Health Sciences Trust, but the Trust Estate only
shall be liable.

                                       11

<PAGE>

                  MORGAN STANLEY DEAN WITTER DISTRIBUTORS INC.
                     OMNIBUS SELECTED DEALER AGREEMENT INC.

Dear Sir or Madam:

        We, Morgan Stanley Dean Witter Distributors Inc. (the "Distributor")
have a distribution agreement (the "Distribution Agreement") with each of the
open-end investment companies listed in Schedule A attached hereto (each, a
"Fund"), pursuant to which we act as the Distributor for the sale of each Fund's
shares of common stock or beneficial interest, as the case may be, (the
"Shares"). Under the Distribution Agreement, we have the right to distribute
Shares for resale.

        Each Fund is an open-end management investment company registered under
the Investment Company Act of 1940, as amended, and the Shares being offered to
the public are registered under the Securities Act of 1933, as amended (the
"Securities Act"). You have received a copy of the Distribution Agreements
between us and each Fund and reference is made herein to certain provisions of
such Distribution Agreements. The terms used herein, including "Prospectus" and
"Registration Statement" of each Fund and "Selected Dealer" shall have the same
meaning in this Agreement as in the Distribution Agreements. As principal, we
offer to sell Shares to your customers upon the following terms and conditions:

        1. In all sales of Shares to the public you shall act on behalf of
customers which for purposes of this Agreement are limited to customers for
which Nations Banc Investments, Inc. is the Introducing Broker, and in no
transaction shall you have any authority to act as agent for a Fund, for us or
for any Selected Dealer.

        2. Orders received from you will be accepted through us or on our behalf
only at the public offering price applicable to each order, as set forth in the
applicable current Prospectus. The procedure relating to the handling of orders
shall be subject to written instructions which we or the applicable Fund shall
forward from time to time to you. All orders are subject to acceptance or
rejection by us or a Fund in the sole discretion of either. The Distributor of
the Fund will promptly notify you in writing of any such rejection.

        3. You shall not place orders for any Shares unless you have already
received purchase orders for such Shares at the applicable public offering price
and subject to the terms hereof and of the applicable Distribution Agreement and
Prospectus. In connection herewith, you agree to abide by the terms of the
applicable Distribution Agreement and Prospectus to the extent required
hereunder. Furthermore, you agree that (i) you will sell any of the Shares only
under circumstances that will result in compliance with all applicable Federal
and state securities laws; (ii) you will not furnish or cause to be furnished to
any person any information relating to the Shares which is inconsistent in any
respect with the information contained in the applicable Prospectus (as then
amended or supplemented) or cause any advertisements to be published by radio or
television or in any newspaper or posted in any public place or use any sales
promotional material without our consent and the consent of the applicable Fund;
and (iii) you will endeavor to obtain proxies from purchasers of Shares. You
also agree that you will be liable to Distributor for payment of the purchase
price for Shares purchased by customers and that you shall make payment for such
shares when due.

        4. We will compensate you for sales of shares of the Funds and personal
services to Fund shareholders by paying you a sales charge and/or other
commission (which may be in the form of a gross sales credit and/or an annual
residual commission) and/or a service fee, each as separately agreed by you and
us with respect to each Fund.

        5. If any Shares sold to your customers under the terms of this
Agreement are repurchased by us for the account of a Fund or are tendered for
redemption within seven business days after the date of the confirmation of the
original purchase by you, it is agreed that you shall forfeit your right to, and
refund to us, any commission received by you with respect to such Shares.

        6. No person is authorized to make any representations concerning the
Shares or the Funds except those contained in the current applicable Prospectus
and in such printed information subsequently issued by us or a Fund as
information supplemental to such Prospectus. In selling Shares, you shall rely
solely on the representations contained in the applicable Prospectus and
supplemental information mentioned above. Any printed information which we
furnish you other than the Prospectus and the Funds' periodic reports and

<PAGE>

proxy solicitation materials are our sole responsibility and not the
responsibility of the Funds, and you agree that the Funds shall have no
liability or responsibility to you in these respects unless expressly assumed in
connection therewith.

        7. You are hereby authorized (i) to place orders directly with a Fund or
its agent for shares of the Fund to be sold by us subject to the applicable
terms and conditions governing the placement of orders for the purchase of Fund
Shares, as set forth in the Distribution Agreement, and (ii) to tender Shares
directly to the Fund or its agent for redemption subject to the applicable terms
and conditions set forth in the Distribution Agreement. We will provide you with
copies of any updates to the Distribution Agreement.

        8. We reserve the right in our discretion, without notice, to suspend
sales or withdraw the offering of Shares entirely. Each party hereto has the
right to cancel this agreement with respect to one or more Funds upon fifteen
days prior written notice to the other party.

        9. I. You shall indemnify and hold us harmless from and against any and
all losses, costs, (including reasonable attorney's fees) claims, damages and
liabilities which arise as a result of action taken pursuant to instructions
from you, or on your behalf to: (a)(i) place orders for Shares of a Fund with
the Fund's transfer agent or direct the transfer agent to receive instructions
for the order of Shares, and (ii) accept monies or direct that the transfer
agent accept monies as payment for the order of such Shares, all as contemplated
by and in accordance with Section 3 of the applicable Distribution Agreement;
(b)(i) place orders for the redemption of Shares of a Fund with the Fund's
transfer agent or direct the transfer agent to receive instruction for the
redemption of such Shares and (ii) to pay redemption proceeds or to direct that
the transfer agent pay redemption proceeds in connection with orders for the
redemption of Shares, all as contemplated by and in accordance with Section 4 of
the applicable Distribution Agreement; Distributor agrees to indemnify and hold
harmless you and your affiliates, officers, directors, control persons and
employees from and against any and all losses, costs (including reasonable
attorney's fees), claims, damages and liabilities which arise as a result of
Distributor's failure to fulfill its obligations hereunder and from any alleged
inaccuracy, omission or misrepresentation contained in any prospectus or any
advertising, or sales literature prepared by Distributor or the Fund provided,
however, that in no case, (i) is this indemnity in favor of you or us and any of
other party's such controlling persons to be deemed to protect us or any such
controlling persons against any liability to which we or any such controlling
persons would otherwise be subject by reason of willful misfeasance, bad faith
or gross negligence in the performance of our duties or by reason of reckless
disregard of our obligations and duties under this Agreement or the applicable
Distribution Agreement; or (ii) are you to be liable under the indemnity
agreement contained in this paragraph with respect to any claim made against us
or any such controlling persons, unless we or any such controlling persons, as
the case may be, shall have notified you in writing within a reasonable time
after the summons or other first legal process giving information of the nature
of the claim shall have been served upon us or such controlling persons (or
after we or such controlling persons shall have received notice of such service
on any designated agent), notwithstanding the failure to notify you of any such
claim shall not relieve you from any liability which you may have to the person
against whom such action is brought otherwise than on account of the indemnity
agreement contained in this paragraph.

        II. You will be entitled to participate at your own expense in the
defense, or, if you so elect, to assume the defense, of any suit brought to
enforce any such liability, but if you elect to assume the defense, such defense
shall be conducted by counsel chosen by you and reasonably satisfactory to us or
such controlling person or persons, defendant or defendants in the suit. In the
event you elect to assume the defense of any such suit and retain such counsel,
we or such controlling person or persons, defendant or defendants in the suit,
shall bear the fees and expenses of any additional counsel retained by them,
but, in case you do not elect to assume the defense of any such suit, you will
reimburse us or such controlling person or persons, defendant or defendants in
the suit, for the reasonable fees and expenses of any counsel retained by them.
Each party shall promptly notify the other party to this Agreement of the
commencement of any litigation or proceedings against it or any of its officers
or directors in connection with the issuance or sale of the Shares pursuant to
this Agreement.

                                       2
<PAGE>

        III. If the indemnification provided for in this Section 9 is
unavailable or insufficient to hold harmless the Distributor, as provided above
in respect of any losses, claims, damages, liabilities or expenses (or actions
in respect thereof) referred to herein, then you shall contribute to the amount
paid or payable by us as a result of such losses, claims, damages, liabilities
or expenses (or actions in respect thereof) in such proportion as is appropriate
to reflect the relative benefits received by you on the one hand and us on the
other from the offering of the Shares. If, however, the allocation provided by
the immediately preceding sentence is not permitted by applicable law, then you
shall contribute to such amount paid or payable by such indemnified party in
such proportion as is appropriate to reflect not only such relative benefits but
also your relative fault on the one hand and our relative fault on the other, in
connection with the statements or omissions which resulted in such losses,
claims, damages, liabilities or expenses (or actions in respect thereof), as
well as any other relevant equitable considerations. You and we agree that it
would not be just and equitable if contribution were determined by pro rata
allocation or by any other method of allocation which does not take into account
the equitable considerations referred to above. The amount paid or payable by us
as a result of the losses, claims, damages, liabilities or expenses (or actions
in respect thereof) referred to above shall be deemed to include any legal or
other expenses reasonably incurred by us in connection with investigating or
defending any such claim. Notwithstanding the provisions of this subsection
(III), you shall not be required to contribute any amount in excess of the
amount by which the total price at which the Shares distributed by you to the
public were offered to the public exceeds the amount of any damages which you
have otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.

        IV. Notwithstanding the provisions of subsections (I), (II) and (III),
we shall indemnify, defend and hold harmless you and your officers, directors,
employees, affiliates, agents, successors and assigns from and against any and
all claims and all related losses, expenses, damages, cost and liabilities
including reasonable attorneys' fees and expenses incurred in investigation or
defense, arising out of or related to any breach of any representation, warranty
or covenant by us contained in Section 15 of this Agreement.

        11. We shall have full authority to take such action as we may deem
advisable in respect of all matters pertaining to the distribution and
redemption of Shares. Neither party shall be under any liability to the other
party except for lack of good faith and for obligations expressly assumed
herein. Nothing contained in this paragraph is intended to operate as, and the
provisions of this paragraph shall not in any way whatsoever constitute, a
waiver by you of compliance with any provision of the Securities Act, or of the
rules and regulations of the Securities and Exchange Commission issued
thereunder.

        12. Each party represents that it is a member in good standing of the
National Association of Securities Dealers, Inc. and, with respect to any sales
in the United States, each party hereby agrees to abide by the Rules of Fair
Practice of such Association relating to the performance of the obligations
hereunder.

        13. We will inform you in writing as to the states in which we believe
the Shares have been qualified for sale under, or are exempt from the
requirements of, the respective securities laws of such states, but we assume no
responsibility or obligation as to your right to sell Shares in any
jurisdiction.

        14. Notwithstanding any other provision of this Agreement to the
contrary, we represent and warrant that the names and addresses of your
customers (or customers of your affiliates) which have or which may come to our
attention in connection with this Agreement are confidential and are your
exclusive property and shall not be utilized by us except in connection with the
functions performed by us in connection with this Agreement. Notwithstanding the
foregoing, should a customer request, that we or an organization affiliated with
us, provide services to such customer, we or such affiliated organization shall
in no way violate this representation and warranty, nor be considered in breach
of this Agreement.

        15. We represent, warrant, and covenant to you that the marketing
materials, any communications distributed to the public and training materials
designed by us or our agents relating to the product sold under this Agreement
are true and accurate and do not omit to state a fact necessary to make the



                                       3
<PAGE>

information contained therein not misleading and comply with applicable federal
and state laws. We further represent, warrant, and covenant to you that the
performance by us of our obligations under this Agreement in no way constitutes
an infringement on or other violation of copyright, trade secret, trademark,
proprietary information or non-disclosure rights of any other party.

        16. We shall maintain a contingency disaster recovery plan, and, in the
event you are so required by any regulatory or governmental agency, we shall
make such plan available to you for inspection at your office upon reasonable
advance notice by you. Each party agrees that it will at all times conduct its
activities under this Agreement in an equitable, legal and professional manner.

        17. We understand that the performance of your and our obligations under
this Agreement is subject to examination during business hours by your
authorized representatives and auditors and by federal and state regulatory
agencies, and we agree that upon being given reasonable notice and proper
identification we shall submit or furnish at a reasonable time and place to any
such representative or regulatory agency reports, information, or other data
relating to this Agreement as may reasonably be required or requested by you. We
shall maintain and make available to you upon reasonable notice all material,
data, files, and records relating to this Agreement for a period of not less
than three years after the termination of this Agreement.

        18. The sales, advertising and promotional materials designed by either
party or its agents relating to products sold under this Agreement shall comply
with applicable federal and state laws. Each party agrees that the sales,
advertising and promotional materials shall be made available to the other party
prior to distribution to your employees or customers.

        19. Any controversy or claim between or among the parties hereto arising
out of or relating to this Agreement, including any claim based on or arising
from an alleged tort, shall be determined by binding arbitration in accordance
with the rules of the National Association of Securities Dealers, Inc. Judgment
upon any arbitration award may be entered in any court having jurisdiction. Any
party to this Agreement may bring an action, including a summary or expedited
proceeding, to compel arbitration of any controversy or claim to which this
Agreement applies in any court having jurisdiction over such action.

        20. All notices or other communications under this Agreement shall be in
writing and given as follows:

If to us:                          Morgan Stanley Dean Witter Distributors Inc.
                                   Attn: Barry Fink,
                                   Two World Trade Center
                                   New York, NY 10048

If to you:                         National Financial
                                   Services Corporation
                                   Attn: Robert Masabug
                                   4201 Congress Street, Suite 245
                                   Boston, MA

or such other address as the parties may hereafter specify in writing. Each such
notice to any party shall be either hand-delivered or transmitted, postage
prepaid, by registered or certified United States mail with return receipt
requested, and shall be deemed effective only upon receipt.

                                       4
<PAGE>

        21. This Agreement shall become effective as of the date of your
acceptance hereof, provided that you return to us promptly a signed and dated
copy.

                            MORGAN STANLEY DEAN WITTER DISTRIBUTORS INC.

                            By
                              ---------------------------------------------
                                        (Authorized Signature)

Please return one signed copy
  of this agreement to:
Morgan Stanley Dean Witter Distributors Inc.
Two World Trade Center
New York, New York 10048

Accepted:

Firm Name: National Financial Services Corp.
          ----------------------------------
By:
          ----------------------------------
Address:   200 Liberty Street
          ----------------------------------
           New York, New York
          ----------------------------------
Date: October 17, 1998
     ---------------------------------------

                                       5
<PAGE>

                                   SCHEDULE A

Dean Witter Global Asset Allocation Fund
Morgan Stanley Dean Witter American Value Fund
Morgan Stanley Dean Witter Balanced Growth Fund
Morgan Stanley Dean Witter Balanced Income Fund
Morgan Stanley Dean Witter California Tax-Free Income Fund
Morgan Stanley Dean Witter Capital Appreciation Fund
Morgan Stanley Dean Witter Capital Growth Securities
Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas" Portfolio
Morgan Stanley Dean Witter Convertible Securities Trust
Morgan Stanley Dean Witter Developing Growth Securities Trust
Morgan Stanley Dean Witter Diversified Income Trust
Morgan Stanley Dean Witter Dividend Growth Securities Inc.
Morgan Stanley Dean Witter Equity Fund
Morgan Stanley Dean Witter European Growth Fund Inc.
Morgan Stanley Dean Witter Federal Securities Trust
Morgan Stanley Dean Witter Financial Services Trust
Morgan Stanley Dean Witter Fund of Funds
Morgan Stanley Dean Witter Global Dividend Growth Securities
Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
Morgan Stanley Dean Witter Global Utilities Fund
Morgan Stanley Dean Witter Growth Fund
Morgan Stanley Dean Witter Hawaii Municipal Trust
Morgan Stanley Dean Witter Health Sciences Trust
Morgan Stanley Dean Witter High Yield Securities Inc.
Morgan Stanley Dean Witter Income Builder Fund
Morgan Stanley Dean Witter Information Fund
Morgan Stanley Dean Witter Intermediate Income Securities Inc.
Morgan Stanley Dean Witter International SmallCap Fund
Morgan Stanley Dean Witter Japan Fund
Morgan Stanley Dean Witter Limited Term Municipal Trust
Morgan Stanley Dean Witter Market Leader Trust
Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
Morgan Stanley Dean Witter Mid-Cap Growth Fund
Morgan Stanley Dean Witter Multi-State Municipal Series Trust
Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
Morgan Stanley Dean Witter New York Tax-Free Income Fund
Morgan Stanley Dean Witter Pacific Growth Fund Inc.
Morgan Stanley Dean Witter Precious Metals and Minerals Trust
Morgan Stanley Dean Witter S&P 500 Index Fund
Morgan Stanley Dean Witter S&P 500 Select Fund
Morgan Stanley Dean Witter Short-Term Bond Fund
Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
Morgan Stanley Dean Witter Special Value Fund
Morgan Stanley Dean Witter Strategist Fund
Morgan Stanley Dean Witter Tax-Exempt Securities Trust
Morgan Stanley Dean Witter U.S. Government Securities Trust
Morgan Stanley Dean Witter Utilities Fund
Morgan Stanley Dean Witter Value-Added Market Series
Morgan Stanley Dean Witter Value Fund
Morgan Stanley Dean Witter World Wide Income Trust

                                      A-1


<PAGE>

                 SECOND AMENDED AND RESTATED RETIREMENT PLAN FOR
                      NON-INTERESTED TRUSTEES OR DIRECTORS

    Certain of the investment companies for which Morgan Stanley Dean Witter
Advisors Inc. ("MSDW Advisors") currently acts as manager or adviser adopted a
Retirement Plan for Non-Interested Trustees and Directors (the "Original Plan")
on February 21, 1991 (the "Commencement Date"). The Original Plan was amended
and restated on October 22, 1993, effective January 1, 1994 and further amended
by First Amendment dated December 19, 1995 and by Second Amendment dated May 8,
1997. The participating Funds now desire to amend and restate the Plan further
as provided herein effective as of the Commencement Date (as so amended, the
"Plan"), for the purposes of expanding the flexibility of Non-Interested
Trustees and Directors to make and change their elections of benefits.

     1.  DEFINITIONS

     (a) "Independent Board Member" shall mean (i) a Trustee of an Adopting Fund
     if the Adopting Fund is organized as a Massachusetts business trust, (ii) a
     Director of an Adopting Fund if the Adopting Fund is organized as a
     corporation, and (iii) a "director" (as such term is defined in Section
     2(a)(12) of the Investment Company Act of 1940, as amended [the "Act"]) of
     an Adopting Fund if the Adopting Fund is any other type of organization,
     who in any such case is not an interested person (as such term is defined
     in Section 2(a)(19) of the Act) of MSDW Advisors.

     (b) "Eligible Board Member" shall mean an Independent Board Member who at
     the time of Retirement (as hereinafter defined) has served as an
     Independent Board Member of any Adopting Fund for at least five years, or
     such lesser period as may be determined by the Board.

     (c) "Eligible Service" shall mean service as an Independent Board Member.

     (d) "Eligible Retirement Date" shall mean, with respect to any Independent
     Board Member, the later of (i) January 1, 1993, (ii) the first day of the
     calendar month following the month in which such Independent Board Member's
     seventy-second birthday occurs, or (iii) such later date as the Board may
     establish as his or her "Eligible Retirement Date."

     (e) "Retirement" shall mean any termination of service of an Independent
     Board Member except any termination which the Board determines to have
     resulted from the Independent Board Member's willful misfeasance, bad
     faith, gross negligence or reckless disregard of the duties involved in the
     conduct of the office of Independent Board Member.

     (f) "Benefit" shall mean with respect to any Eligible Board Member, (i) the
     Regular Benefit, unless the Alternate Benefit has been elected or the Early
     Benefit granted, (ii) the Alternate Benefit, if elected by such Eligible
     Board Member, unless the Early Benefit has been granted, or (iii) the Early
     Benefit, if granted by the Board.

     (g) "Eligible Compensation" shall mean, with respect to any Eligible Board
     Member of any Adopting Fund, an amount equal to one-fifth of the total
     compensation, inclusive of compensation as a member of the Board or of a
     Board Committee or as chairperson of a Board Committee, earned by such
     Eligible Board Member for Eligible Service with respect to such Adopting
     Fund (other than under this Plan) in the five year period prior to the date
     of his or her Retirement.

     (h) "Actuarial Equivalent" shall mean an actuarially equivalent benefit, as
     computed by the Board with the advice of an enrolled actuary (as defined in
     the Employee Retirement Income Security Act of 1974, as amended ["ERISA"]),
     using assumptions determined by the Board at the time of the computation.

     (i) "Board" shall mean, with respect to any Adopting Fund, the Board of
     Directors or Trustee or "directors," (as such term is defined in Section
     2(a)(12) of the Act, of such Adopting Fund.

     (j) "Adoption Date" shall mean February 21, 1991.

                                        1

<PAGE>

    2.  ELIGIBILITY

   Each Eligible Board Member will be eligible to receive a Benefit from each
Adopting Fund commencing on such Eligible Board Member's Eligible Retirement
Date.

     3.  RETIREMENT DATE; AMOUNT OF BENEFIT

     (a) RETIREMENT. Each Independent Board Member will retire not later than
     his or her Eligible Retirement Date. The foregoing provision shall be
     deemed by the adoption of this Plan by any Fund to be an amendment of such
     Fund's by-laws superseding any provision therein that an Independent Board
     Member shall serve until his or her successor shall have been elected and
     qualified. Notwithstanding the foregoing, the Board of any Adopting Fund
     may, to avoid the simultaneous retirement of more than one of the
     Independent Board Members or for any other appropriate reason, waive the
     obligation of any Independent Board Member to retire on such date and may
     establish a later date as his or her "Eligible Retirement Date." Any
     establishment of an Eligible Retirement Date may be further extended by the
     Board.

     (b) REGULAR RETIREMENT BENEFIT. Upon Retirement, each Eligible Board Member
     will receive, commencing as of such Eligible Board Member's Eligible
     Retirement Date and continuing for the remainder of the Eligible Board
     Member's life, from each Adopting Fund a retirement benefit (the "Regular
     Benefit") paid at an annual rate equal to the percentage of his or her
     Eligible Compensation established by resolution of the Board of such
     Adopting Fund most recently adopted prior to the date of his or her
     retirement (the "Most Recent Resolution") as the "Minimum Percentage," plus
     an additional percentage of such Eligible Compensation for each full month
     of Eligible Service for any of the Adopting Funds in excess of five years
     established by the Most Recent Resolution as the "Monthly Additional
     Percentage," up to the percentage established by the Most Recent Resolution
     as the "Maximum Percentage" of such Eligible Compensation for ten or more
     years of Eligible Service for any of the Adopting Funds.

     (c) ELECTION OF ALTERNATE PAYMENT OF BENEFIT. Each Independent Board Member
     shall have the option, exercisable at any time, and revisable at any time
     and from time to time, prior to his or her first acceptance of benefits
     under the Plan to elect (i) to receive, subject to being or becoming an
     Eligible Board Member, a retirement benefit (the "Alternate Benefit") based
     upon the combined life expectancy of such Eligible Board Member and his or
     her spouse on the date of such Eligible Board Member's Retirement (rather
     than solely upon such Eligible Board Member's own life, as shall be the
     case unless such Eligible Board Member shall otherwise elect as provided in
     this Section 3(c)), and (ii) if the Independent Board Member elects to
     receive the Alternate Benefit, to elect a benefit either (x) to the last
     survivor of the Eligible Board Member or spouse, whether the Eligible Board
     Member or spouse is the last survivor (a "joint and last survivor" benefit)
     or (y) to the Eligible Board Member's spouse if the spouse survives the
     Eligible Board Member (a "joint and contingent survivor" benefit) equal in
     periodic amount to a percentage (the "Designated Survivor's Percentage") of
     the periodic amount that would be, or would be assumed to be, in effect
     while both the Eligible Board Member and spouse were alive. The Designated
     Survivor's Percentage shall be the percentage stated in the most recently
     delivered notice of election given by such Independent Board Member, or, if
     no percentage is stated in any such notice, 100%. Payment of the Alternate
     Benefit shall commence on the later of such Eligible Board Member's
     Eligible Retirement Date or the date of his or her Retirement, shall be
     reduced to the Designated Survivor's Percentage (if less than 100%) upon
     the earlier of the deceases of the Eligible Board Member and spouse in the
     case of a joint and last survivor benefit, or of the Eligible Board Member
     in the case of a joint and contingent survivor benefit, and shall be
     payable through the remainder of the life of the survivor of such Eligible
     Board Member and spouse. The Alternate Benefit shall be the Actuarial
     Equivalent of the Regular Benefit provided under paragraph 3(b). In the
     event of the death of an Eligible Board Member who has chosen the Alternate
     Benefit prior to such Eligible Board Member's Retirement, his or her spouse
     shall be entitled to a retirement benefit, commencing upon such death,
     which shall be the Actuarial Equivalent of the benefit such spouse would
     have received had such Eligible Board Member died on his or her Eligible
     Retirement Date.

     (d) EARLY PAYMENT OF BENEFIT. An Eligible Board Member for good cause may
     apply to the Board of any Adopting Fund for, and, at the discretion of such
     Board, may be granted, a retirement benefit (the "Early Benefit") which is
     the Actuarial Equivalent of the Regular Benefit or Alternate Benefit
     previously elected

                                        2

<PAGE>

     by such Eligible Board Member. Payment of the Early Benefit shall commence
     on a date fixed by the Board in its sole discretion as such Eligible Board
     Member's Eligible Retirement Date and shall be payable through the
     remainder of such Eligible Board Member's life, or, if the Alternate
     Benefit had been elected, the later of the lives of such Eligible Board
     Member and spouse. Good cause for these purposes may include (but is not
     limited to) the permanent disability of the Eligible Board Member.

     (e) Anything contained herein to the contrary notwithstanding, upon the
     adoption by an Adopting Fund of a plan of liquidation, such Adopting Fund
     shall pay to each Eligible Board Member who has retired, in lieu of his or
     her Benefit from such Adopting Fund, an amount (the "Lump Sum") equal to
     the then present value of the Benefit, using a discount rate determined by
     the Board at the time of the computation. The Lump Sum shall be paid by
     such Adopting Fund at or before the final liquidation and dissolution of
     such Adopting Fund.

     4.  TIME OF PAYMENT

     The Benefit to each Eligible Board Member or his or her spouse will, except
     as provided in Section 3(c), 3(d) or 3(e) hereof, commence on such Eligible
     Board Member's Eligible Retirement Date and will be paid each year in
     quarterly installments that are as nearly equal as possible on the first
     day of each calendar quarter.

     5.  PAYMENT OF BENEFIT; ALLOCATION OF COSTS

     Each Adopting Fund is responsible for the payment of Benefits based upon
     Eligible Compensation from such Adopting Fund, as well as its proportionate
     share of all expenses of administration of the Plan, including without
     limitation all accounting and legal fees and expenses and fees and expenses
     of any enrolled actuary. The obligations of each Adopting Fund to pay such
     benefits and expenses will not be secured or funded in any manner, and such
     obligations will not have any preference over the lawful claims of the
     Adopting Funds' creditors and stockholders, shareholders, beneficiaries or
     limited partners, as the case may be. To the extent that an Adopting Fund
     consists of one or more separate portfolios, such costs and expenses will
     be allocated among such portfolios in the proportion that compensation of
     Independent Board Members is allocated among such portfolios.

     6.  ADMINISTRATION

     (a) ADMINISTRATION. Any question involving entitlement to payments under or
     the administration of the Plan will be referred to the Board, which shall
     make all interpretations and determinations necessary or desirable for the
     Plan's administration (such interpretations and determinations to be final
     and conclusive) and shall cause such records to be kept as may be necessary
     for the administration of the Plan.

     7.  MISCELLANEOUS

     (a) RIGHTS NOT ASSIGNABLE. The right to receive any payment under the Plan
     is not transferable or assignable. Except as otherwise provided herein with
     respect to the Alternate Benefit, the Plan shall not create any benefit,
     cause of action, right of sale, transfer, assignment, pledge, encumbrance,
     or other such right in any spouse or heirs or the estate of any Eligible
     Board Member or retired Eligible Board Member.

     (b) AMENDMENT, ETC. With respect to each Adopting Fund, the Board,
     including a majority of the Independent Board Members of such Board, may at
     any time amend or terminate the Plan or waive any provision of the Plan,
     PROVIDED, that except as otherwise provided herein, no amendment,
     termination or waiver will impair the rights of an Independent Board Member
     to receive upon Retirement the payments which would have been made to such
     Independent Board Member had there been no such amendment, termination or
     waiver (based upon such Board Member's Eligible Service to the date of such
     amendment, termination or waiver) or the rights of a retired Eligible Board
     Member to receive any Benefit due under the Plan, without the consent of
     such Independent Board Member or Eligible Board Member. Notwithstanding any
     provision to the contrary, the Board, with the concurrence of a majority of
     the Independent Board Members of such Board and without the consent of any
     individual Independent Board Member, may at any time (i) amend or terminate
     the Plan to comply with any applicable provision of law or any rule or
     regulation adopted, or proposed to be adopted, by any governmental agency
     or any decision of any court or administrative agency, (ii) change any
     assumptions used to determine what benefit may be an

                                        3

<PAGE>

     Actuarial Equivalent, or (iii) terminate the Plan of an Adopting Fund (an
     "Acquired Adopting Fund") substantially all the assets of which are
     acquired by an entity which is itself an Adopting Fund (the "Acquiring
     Adopting Fund") pursuant to a plan of reorganization between the Acquired
     Adopting Fund and the Acquiring Adopting Fund (the "Reorganization Plan"),
     such termination to be deemed approved upon adoption of the Reorganization
     Plan and to be effective upon the effectiveness of the reorganization
     contemplated thereby without liability or further obligation for any
     benefits accrued or otherwise payable to an Independent Board Member by the
     Acquired Adopting Fund.

     (c) NO RIGHT TO REELECTION. Nothing in the Plan will create any obligation
     on the part of the Board to nominate any Independent Board Member for
     reelection.

     (d) VACANCIES. Although the Board will retain the right to increase or
     decrease its size, it shall be the general policy to replace each retired
     Independent Board Member by selecting a new Independent Board Member from
     candidates recommended by the remaining Independent Board Members.

     (e) CONSULTING. Each retired Eligible Board Member may render such services
     for any of the Adopting Funds, for such compensation, as may be agreed upon
     from time to time by such retired Eligible Board Member and the Board.

     (f) EFFECTIVENESS. The Plan will be effective for all Independent Board
     Members who have dates of Retirement occurring on or after the Adoption
     Date. Periods of Eligible Service shall include periods commencing prior to
     such date.

                                        4

<PAGE>

                        MORGAN STANLEY DEAN WITTER FUNDS:
                   FUNDS THAT HAVE ADOPTED THE RETIREMENT PLAN
                    FOR NON-INTERESTED TRUSTEES OR DIRECTORS

                                   SCHEDULE A
                                   MARCH 1999

1)      Active Assets California Tax-Free Trust
2)      Active Assets Government Securities Trust
3)      Active Assets Money Trust
4)      Active Assets Tax-Free Trust
5)      Morgan Stanley Dean Witter American Value Fund
6)      Morgan Stanley Dean Witter California Insured Municipal Income Trust
7)      Morgan Stanley Dean Witter California Quality Municipal Securities
8)      Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
9)      Morgan Stanley Dean Witter California Tax-Free Income Fund
10)     Morgan Stanley Dean Witter Capital Growth Securities
11)     Morgan Stanley Dean Witter Convertible Securities Trust
12)     Morgan Stanley Dean Witter Developing Growth Securities Trust
13)     Morgan Stanley Dean Witter Diversified Income Trust
14)     Morgan Stanley Dean Witter Dividend Growth Securities Inc.
15)     Morgan Stanley Dean Witter European Growth Fund Inc.
16)     Morgan Stanley Dean Witter Federal Securities Trust
17)     Morgan Stanley Dean Witter Global Dividend Growth Securities
18)     Morgan Stanley Dean Witter Government Income Trust
19)     Morgan Stanley Dean Witter Health Sciences Trust
20)     Morgan Stanley Dean Witter High Income Advantage Trust
21)     Morgan Stanley Dean Witter High Income Advantage Trust II
22)     Morgan Stanley Dean Witter High Yield Securities Inc.
23)     Morgan Stanley Dean Witter Income Securities Inc.
24)     Morgan Stanley Dean Witter Insured Municipal Bond Trust
25)     Morgan Stanley Dean Witter Insured Municipal Income Trust
26)     Morgan Stanley Dean Witter Insured Municipal Securities
27)     Morgan Stanley Dean Witter Insured Municipal Trust
28)     Morgan Stanley Dean Witter Intermediate Income Securities
29)     Morgan Stanley Dean Witter Limited Term Municipal Trust
30)     Morgan Stanley Dean Witter Liquid Asset Fund Inc.
31)     Morgan Stanley Dean Witter Multi-State Municipal Series Trust
32)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust
33)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust II
34)     Morgan Stanley Dean Witter Municipal Income Opportunities Trust III
35)     Morgan Stanley Dean Witter Municipal Income Trust
36)     Morgan Stanley Dean Witter Municipal Income Trust II
37)     Morgan Stanley Dean Witter Municipal Premium Income Trust
38)     Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
39)     Morgan Stanley Dean Witter New York Municipal Money Market Trust
40)     Morgan Stanley Dean Witter New York Tax-Free Income Fund
41)     Morgan Stanley Dean Witter Pacific Growth Fund Inc.
42)     Morgan Stanley Dean Witter Prime Income Trust
43)     Morgan Stanley Dean Witter Quality Municipal Income Trust
44)     Morgan Stanley Dean Witter Quality Municipal Investment Trust
45)     Morgan Stanley Dean Witter Quality Municipal Securities
46)     Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
47)     Morgan Stanley Dean Witter Strategist Fund

                                       5

<PAGE>

48)     Morgan Stanley Dean Witter Tax-Exempt Securities Trust
49)     Morgan Stanley Dean Witter Tax-Free Daily Income Trust
50)     Morgan Stanley Dean Witter U.S. Government Money Market Trust
51)     Morgan Stanley Dean Witter U.S. Government Securities Trust
52)     Morgan Stanley Dean Witter Utilities Fund
53)     Morgan Stanley Dean Witter Value-Added Market Series
54)     Morgan Stanley Dean Witter Variable Investment Series
55)     Morgan Stanley Dean Witter World Wide Income Trust

                                       6

<PAGE>


                       DEAN WITTER HEALTH SCIENCES TRUST

                                                          August 17, 1992

Dean Witter Health Sciences Trust
Two World Trade Center
New York, New York 10048

Dear Sirs:

     With respect to the Registration Statement on Form N-1A (File No.
33-48189) (the "Registration Statement") filed by Dean Witter Health Sciences
Trust, a Massachusetts business trust (the "Fund"), with the Securities and
Exchange Commission for the purpose of registering under the Securities Act of
1933, as amended, an indefinite number of shares of Beneficial Interest of
$0.01 par value of the Fund (the "Shares"), I, as your counsel, have examined
such Fund records, certificates and other documents and reviewed such questions
of law as I have considered necessary or appropriate for the purposes of this
opinion, and on the basis of such examination and review, I advise you that, in
my opinion, proper trust proceedings have been taken by the Fund so that the
Shares have been validly authorized; and when the Shares have been issued and
sold in accordance with the terms of the Underwriting Agreement referred to in
the Registration Statement, the Shares will be validly issued, fully paid and
non-assessable.

     As to matters of Massachusetts law contained in the foregoing opinion, I
have relied upon the opinion of Lane & Altman, dated August 17, 1992.

     I hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference to me under the caption "Legal
Counsel" in the Statement of Additional Information forming a part of the
Registration Statement. In giving this consent, I do not thereby admit that I
am within the category of persons whose consent is required under Section 7 of
the Securities Act of 1933, as amended, or the rules and regulations of the
Securities and Exchange Commission thereunder.

                                             Very truly yours,



                                             /s/ Sheldon Curtis
                                             -------------------
                                                 Sheldon Curtis
                                                 Vice President
                                                 and General Counsel








<PAGE>


                            [LANE & ALTMAN LETTERHEAD]



                                                   August 18, 1992

Sheldon Curtis, Vice President and
General Counsel
Dean Witter Reynolds, Inc.
Two World Trade Center
New York, NY 10048

        Re:  Dean Witter Health Sciences Trust

Dear Sir:

     We understand that the trustees (the "Trustees") of Dean Witter Health
Sciences Trust, a Massachusetts business trust (the "Trust"), intend, on or
about August 18, 1992, to cause to be filed on behalf of the Trust a
Pre-effective Amendment to Registration Statement No. 33-48189 (the
"Registration Statement") for the purpose of registering for sale shares of
Beneficial Interest, $.01 par value, of the Trust (the "Shares"). We further
understand that the Shares will be issued and sold pursuant to a distribution
agreement (the "Distribution Agreement") to be entered into between the Trust
and Dean Witter Reynolds Inc., as distributor (the "Distributor").

     You have requested that we act as special counsel to the Trust regarding
certain matters of Massachusetts law respecting the organization of the Trust,
and in such capacity we are furnishing you with this opinion.

     The Trust is a trust created under a written declaration of trust finally
executed and delivered in Boston, Massachusetts on May 26, 1992 (the "Trust
Agreement"). The Trustees (as defined in the Trust Agreement) have the powers
set forth in the Trust Agreement, subject to the terms, provisions and
conditions therein provided.

     In connection with the opinions set forth herein, you and the Trust have
provided to us originals, copies or facsimile transmissions of, and we have
reviewed, among other things: a




<PAGE>
                           [LANE & ALTMAN LETTERHEAD]

                                                      Dean Witter Reynolds, Inc.
                                                      August 18, 1992
                                                      Page 2


copy of the Declaration of Trust dated May 26, 1992; certificate of the
Secretary of the Trust dated August 18, 1992, attesting to the due adoption
of certain resolutions attached thereto; a form of Distribution Agreement;
and the Registration Statement (including the exhibits thereto). We have
assumed that the by-laws filed as an exhibit to the Registration Statement
have been duly adopted by the Trustees.

     In rendering this opinion we have assumed, without independent
verification, (i) the due authority of all individuals signing in
representative capacities and the genuineness of signatures, (ii) the
authenticity, completeness and continued effectiveness of all documents or
copies furnished to us and (iii) that no amendments, agreements, resolutions
or actions have been approved, executed or adopted which would limit, supersede
or modify the items described above. We have also examined such questions of
law as we have concluded necessary or appropriate for purposes of the
opinions expressed below. Where documents are referred to in resolutions
approved by the Trustees, or in the Registration Statement, we assume such
documents are the same as in the most recent form provided to us, whether as an
exhibit to the Registration Statement, or otherwise. When any opinion set forth
below relates to the existence or standing of the Trust, such opinion is based
entirely upon and is limited by the items referred to above, and we understand
that the foregoing assumptions, limitations and qualifications are acceptable
to you.

     Based upon the foregoing, and with respect to Massachusetts law only
(except that no opinion is herein expressed with respect to compliance with the
Massachusetts Uniform Securities Act), to the extent that Massachusetts law
may be applicable, and without reference to the laws of any of the other
several states or of the United States of America, including State and Federal
securities laws, we are of the opinion that:

     1. The Trust is a business trust with transferable shares, organized in
compliance with the requirements of The Commonwealth of Massachusetts and the
Trust Agreement is legal and valid.

     2. The Shares to which the Registration Statement relates and which are to
be registered under the Securities


<PAGE>
                           [LANE & ALTMAN LETTERHEAD]

                                                      Dean Witter Reynolds, Inc.
                                                      August 18, 1992
                                                      Page 3


Act of 1933, as amended, will be legally and validly issued upon receipt by
the Trust of consideration determined by the Trustees in compliance with
Article VI, Section 6.4 of the Trust Agreement. We are further of the opinion
that such Shares, when issued, will be fully paid and non-assessable by the
Trust.

     We understand that you will rely on this opinion solely in connection with
your opinion to be filed with the Securities and Exchange Commission as an
Exhibit to the Registration Statement. We hereby consent to such use of this
opinion and we also consent to the filing of said opinion with the Securities
and Exchange Commission. In so consenting, we do not thereby admit to be within
the category of persons whose consent is required under Section 7 of the
Securities Act of 1933, as amended, or the rules and regulations of the
Securities and Exchange Commission thereunder.


                                                Very truly yours,


                                                /s/Lane & Altman
                                               --------------------
                                               LANE & ALTMAN













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