PIMCO FIXED INCOME SHARES
497, 2000-03-27
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<PAGE>


                                                 Filed pursuant to Rule 497(e)
                                                 Registration No. 333-92415

                    Fixed Income SHares ("FISH") Prospectus


FISH: Series C      This Prospectus explains what you should know about each
and FISH:           Portfolio before you invest. Please read it carefully.
Series M
(each a             The Securities and Exchange Commission has not approved or
"Portfolio")        disapproved these securities, or determined if this
                    Prospectus is truthful or complete.  Any representation to
March 17,           the contrary is a criminal offense.
2000


<PAGE>

                    Risk/Return Summary

                    The following summaries identify the investment objective,
                    principal investments and strategies, principal risks,
                    performance information and fees and expenses of each
                    Portfolio. A more detailed "Summary of Principal Risks"
                    describing principal risks of investing in a Portfolio
                    begins on p. 7.

                    It is possible to lose money on investments in a Portfolio.
                    An investment in a Portfolio is not a deposit of a bank and
                    is not guaranteed or insured by the Federal Deposit
                    Insurance Corporation or any other government agency.


                                      -2-
<PAGE>

                                 FISH: Series C

- --------------------------------------------------------------------------------
Principal           Investment Objective             Portfolio Focus
Investments and     Seeks maximum total return,      Intermediate maturity fixed
Strategies          consistent with preservation of  income securities
                    capital and prudent investment
                    management                       Average Portfolio Duration
                                                     0-8 years

                    Credit Quality
                    B to Aaa; maximum 50% below Baa

                    Dividend Frequency
                    Declared daily and distributed monthly


                    The FISH: Series C seeks to achieve its investment objective
                    by investing in a portfolio of U.S. and foreign fixed income
                    instruments of the following types:

                    o corporate debt securities, including convertible
                      securities and corporate commercial paper;
                    o inflation-indexed bonds issued by corporations;
                    o structured notes, including hybrid or "indexed"
                      securities, catastrophe bonds and loan participations;
                    o delayed funding loans and revolving credit facilities;
                    o bank certificates of deposit, fixed time deposits and
                      bankers' acceptances;
                    o repurchase agreements and reverse repurchase agreements;
                    o debt securities issued by states or local governments and
                      their agencies, authorities and other instrumentalities;
                    o obligations of foreign governments and their subdivisions,
                      agencies and instrumentalities; and
                    o obligations of international agencies or supranational
                      entities.

                          The Portfolio may invest up to 50% of its assets
                    in high yield securities (commonly known as "junk bonds")
                    rated B or higher by Standard & Poor's Rating Service or
                    Moody's Investors Service, Inc. or, if unrated, determined
                    by the Portfolio's investment adviser or sub-adviser to be
                    of comparable quality. The Portfolio may invest its assets
                    in securities denominated in foreign currencies; however,
                    the Portfolio will normally hedge at least 75% of its
                    exposure to foreign currency to reduce the risk of loss due
                    to fluctuations in currency exchange rates through forward
                    foreign currency exchange contracts, foreign currency
                    futures contracts and options on foreign currencies and
                    foreign currency futures contracts.

                          The Portfolio may invest its assets in securities
                    issued or guaranteed by the U.S. Government, its agencies
                    or instrumentalities.

                          The Portfolio may invest in instruments of any
                    maturity, and the average portfolio duration of this
                    Portfolio varies, and will not normally exceed eight years,
                    based on the adviser's or sub-adviser's forecast for
                    interest rates. Duration is a measure of the expected life
                    of a fixed income security that is used to determine the
                    sensitivity of a security's price to changes in interest
                    rates. The longer a security's duration, the more sensitive
                    it will be to changes in interest rates. Similarly, a
                    portfolio with a longer average portfolio duration will be
                    more sensitive to changes in interest rates than a
                    portfolio with a shorter average portfolio duration.

                          The Portfolio may invest all of its assets in
                    derivative instruments, such as options, futures contracts
                    or swap agreements. The Portfolio may lend its portfolio
                    securities to brokers, dealers and other financial
                    institutions to earn income. Rather than investing directly
                    in the securities in which it primarily invests, the
                    Portfolio may use other investment techniques to gain
                    exposure to market movements related to such securities,
                    such as entering into a series of contracts to buy or sell
                    such securities. The "total return" sought by the Portfolio
                    consists of income earned on its investments, plus capital
                    appreciation, if any, which generally arises from decreases
                    in interest rates or improving credit fundamentals for a
                    particular sector or security.


                                      -3-
<PAGE>

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

Principal Risks     Among the principal risks of investing in the Portfolio,
                    which could adversely affect its net asset value, yield and
                    total return, are:

                    o Interest Rate Risk        o Derivatives Risk
                    o Credit Risk               o Liquidity Risk
                    o Market Risk               o Management Risk
                    o Foreign Investment Risk   o Non-diversification Risk

                    o Currency Risk
                    o Leveraging Risk
                    o Issuer Risk
                    o High Yield Risk

                    o Emerging Market Risk


                    Please see "Summary of Principal Risks" for a description of
                    these and other principal risks of investing in the
                    Portfolio.

- --------------------------------------------------------------------------------
Performance         No performance information is available for the Portfolio
Information         because it has not yet been in operation for a full calendar
                    year. In the future, the Portfolio will disclose performance
                    information in a bar chart and performance table. Such
                    disclosure will give some indication of the risks of an
                    investment in the Portfolio by comparing the Portfolio's
                    performance with a broad measure of market performance and
                    by showing changes in the Portfolio's performance from year
                    to year.

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


Fees and Expenses   These tables describe the fees and expenses you may pay
Portfolio           of the if you buy and hold shares of the Portfolio(1):


                    Shareholder Fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                                      Maximum Sales Charge (Load)        Maximum Contingent Deferred Sales Charge
                                      Imposed on Purchases (as           (Load) (as a percentage of original
                                      a percentage of offering price)    purchase price)
                    =============================================================================================
                    <S>               <C>                                <C>
                    FISH: Series C    0%                                 0%
                    =============================================================================================

</TABLE>

                    Annual Portfolio Operating Expenses (expenses that are
                    deducted from Portfolio assets)

<TABLE>
<CAPTION>
                                                                                                     Total
                                                                                                     Annual
                                                                                                     Portfolio
                                                         Distribution and/or                         Operating
                                      Advisory Fees      Service (12b-1) Fees   Other Expenses       Expenses
                    =============================================================================================
                    <S>               <C>                <C>                    <C>                  <C>
                    FISH: Series C    0%                 0%                     0%                   0%
                    =============================================================================================
</TABLE>

                    Examples: The examples are intended to help you compare the
                    cost of investing in shares of the FISH: Series C with the
                    costs of investing in other mutual funds. The Examples
                    assume that you invest $10,000 in the shares of the
                    Portfolio for the time periods indicated, that your
                    investment has a 5% return each year, the reinvestment of
                    all dividends and distributions, and that the Portfolio's
                    operating expenses remain the same. Although your actual
                    costs may be higher or lower, the Examples show what your
                    costs would be based on these assumptions.

<TABLE>
<CAPTION>
                                      Example: Assuming you redeem your     Example: Assuming you do not
                                      shares at the end of each period      redeem your shares
                                      Year 1            Year 3              Year 1            Year 3
                    ===========================================================================================
                    <S>               <C>               <C>                 <C>               <C>
                    FISH: Series C    $0                $0                  $0                $0
                    ===========================================================================================
</TABLE>


(1) The tables show fees and expenses of the Portfolio as 0%, reflecting the
fact that no fees or expenses are charged by the Portfolio. You should be
aware, however, that the Portfolio is an integral part of "wrap-fee" programs
sponsored by investment advisers unaffiliated with the Portfolio or PIMCO.
Typically, participants in these programs pay a "wrap" fee to their investment
adviser. You should read carefully the wrap-fee brochure provided to you by
your investment adviser. The brochure is required to include information about
the fees charged by your adviser and the fees paid by your adviser to PIMCO.
You pay no additional fees or expenses to purchase shares of the Portfolio.


                                      -4-
<PAGE>
                                 FISH: Series M

- --------------------------------------------------------------------------------
Principal           Investment Objective             Portfolio Focus
Investments and     Seeks maximum total return,      Intermediate maturity fixed
Strategies          consistent with preservation of  income securities
                    capital and prudent investment
                    management                       Average Portfolio Duration
                                                     0-8 years

                    Credit Quality
                    B to Aaa; maximum 50% below Baa

                    Dividend Frequency
                    Declared daily and distributed monthly


                    The FISH: Series M seeks to achieve its investment objective
                    by investing primarily in a portfolio of mortgage and other
                    asset-backed securities, including:

                    o mortgage pass-through securities;
                    o collateralized mortgage obligations;
                    o commercial mortgage-backed securities;
                    o mortgage dollar rolls;
                    o stripped mortgage-backed securities;
                    o debt securities issued by states or local governments
                      and their agencies, authorities and other instrumen-
                      talities;
                    o bank certificates of deposit, fixed time deposits and
                      bankers' acceptances; and
                    o other securities that directly or indirectly represent a
                      participation in, or are secured by and payable from,
                      mortgage loans on real property.

                          The Portfolio may invest in instruments of any
                    maturity, and the average portfolio duration of this
                    Portfolio varies, and will not normally exceed eight
                    years, based on the investment adviser's or sub-adviser's
                    forecast for interest rates.

                          The Portfolio may invest up to 50% of its assets in
                    high yield mortgage-backed securities (commonly known as
                    "junk bonds"), including commercial mortgage-backed
                    securities, rated B or higher by Standard & Poor's Rating
                    Service or Moody's Investors Service, Inc. or, if unrated,
                    determined by the Portfolio's investment adviser or
                    sub-adviser to be of comparable quality.

                          The Portfolio may invest all of its assets in
                    derivative instruments, such as options, futures contracts
                    or swap agreements. The Portfolio may lend its portfolio
                    securities to brokers, dealers and other financial
                    institutions to earn income. Rather than investing directly
                    in the securities in which it primarily invests, the
                    Portfolio may use other investment techniques to gain
                    exposure to market movements related to such securities,
                    such as entering into a series of contracts to buy or sell
                    such securities. The "total return" sought by the Portfolio
                    consists of income earned on its investments, plus capital
                    appreciation, if any, which generally arises from decreases
                    in interest rates or improving credit fundamentals for a
                    particular sector or security.

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

Principal Risks     Among the principal risks of investing in the Portfolio,
                    which could adversely affect its net asset value, yield and
                    total return, are:

                    o Mortgage Risk         o Derivatives Risk
                    o Interest Rate Risk    o Liquidity Risk
                    o Credit Risk           o Management Risk
                    o Market Risk           o Non-diversification Risk

                    o Currency Risk
                    o Leveraging Risk
                    o Issuer Risk
                    o High Yield Risk

                    Please see "Summary of Principal Risks" for a description of
                    these and other principal risks of investing in the
                    Portfolio.

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

Performance         No performance information is available for the Portfolio
Information         because it has not yet been in operation for a full calendar
                    year. In the future, the Portfolio will disclose performance
                    information in a bar chart and performance table. Such
                    disclosure will give some indication of the risks of an
                    investment in the Portfolio by comparing the Portfolio's
                    performance with a broad measure of market performance and
                    by showing changes in the Portfolio's performance from year
                    to year.

                                      -5-
<PAGE>

Fees and Expenses   These tables describe the fees and expenses you may pay if
of the Portfolio    you buy and hold shares of the Portfolio(2):

                    Shareholder Fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                                                                         Maximum Contingent Deferred
                                      Maximum Sales Charge (Load)        Sales Charge (Load)
                                      Imposed on Purchases (as          (as a percentage of original
                                      a percentage of offering price)    purchase price)
                    =============================================================================================
                    <S>               <C>                                <C>
                    FISH: Series M    0%                                 0%
                    =============================================================================================
</TABLE>

                    Annual Portfolio Operating Expenses (expenses that are
                    deducted from Portfolio assets)

<TABLE>
<CAPTION>
                                                                                                     Total
                                                                                                     Annual
                                                                                                     Portfolio
                                                         Distribution and/or                         Operating
                                      Advisory Fees      Service (12b-1) Fees   Other Expenses       Expenses
                    =============================================================================================================
                    <S>               <C>                <C>                    <C>                  <C>
                    FISH: Series M    0%                 0%                     0%                   0%
                    =============================================================================================================
</TABLE>

                    Examples: The examples are intended to help you compare the
                    cost of investing in shares of the FISH: Series C with the
                    costs of investing in other mutual funds. The Examples
                    assume that you invest $10,000 in the shares of the
                    Portfolio for the time periods indicated, that your
                    investment has a 5% return each year, the reinvestment of
                    all dividends and distributions, and that the Portfolio's
                    operating expenses remain the same. Although your actual
                    costs may be higher or lower, the Examples show what your
                    costs would be based on these assumptions.

<TABLE>
<CAPTION>


                                       Example: Assuming you redeem your     Example: Assuming you do not
                                       shares at the end of each period      redeem your shares
                                       Year 1            Year 3              Year 1            Year 3
=========================================================================================================
                    <S>               <C>               <C>                 <C>               <C>
                    FISH: Series M    $0                $0                  $0                $0
                    =========================================================================================================
</TABLE>


(2) The tables show fees and expenses of the Portfolio as 0%, reflecting the
fact that no fees or expenses are charged by the Portfolio. You should be
aware, however, that the Portfolio is an integral part of "wrap-fee" programs
sponsored by investment advisers unaffiliated with the Portfolio or PIMCO.
Typically, participants in these programs pay a "wrap" fee to their investment
adviser. You should read carefully the wrap-fee brochure provided to you by
your investment adviser. The brochure is required to include information about
the fees charged by your adviser and the fees paid by your adviser to PIMCO.
You pay no additional fees or expenses to purchase shares of the Portfolio.



                                      -6-
<PAGE>

                     Summary of Principal Risks

                     The value of your investment in a Portfolio changes with
                     the values of that Portfolio's investments. Many factors
                     can affect those values. The factors that are most likely
                     to have a material effect on a particular Portfolio's
                     portfolio as a whole are called "principal risks." The
                     principal risks of each Portfolio are identified in the
                     Portfolio Summaries and are summarized in this section.
                     Each Portfolio may be subject to additional principal risks
                     and risks other than those described below because the
                     types of investments made by a Portfolio can change over
                     time. Securities and investment techniques mentioned in
                     this summary and described in greater detail under
                     "Characteristics and Risks of Securities and Investment
                     Techniques" appear in bold type. That section and
                     "Investment Objectives and Policies" in the Statement of
                     Additional Information also include more information about
                     the Portfolios, their investments and the related risks.
                     There is no guarantee that a Portfolio will be able to
                     achieve its investment objective.

Interest Rate Risk   As interest rates rise, the value of fixed income
                     securities in a Portfolio's portfolio are likely to
                     decrease. Securities with longer durations tend to be more
                     sensitive to changes in interest rates, usually making them
                     more volatile than securities with shorter durations.
                          Some investments give the issuer the option to call,
                     or redeem, these investments before their maturity date. If
                     an issuer "calls" its security during a time of declining
                     interest rates, a Portfolio might have to reinvest the
                     proceeds in an investment offering a lower yield, and
                     therefore might not benefit from any increase in value as a
                     result of declining interest rates.

Credit Risk          A Portfolio could lose money if the issuer or guarantor of
                     a fixed income security, or the counterparty to a
                     derivatives contract, repurchase agreement or loan of
                     portfolio securities, is unable or unwilling to make timely
                     principal and/or interest payments, or to otherwise honor
                     its obligations. Securities are subject to varying degrees
                     of credit risk, which are often reflected in credit
                     ratings. Municipal bonds are subject to the risk that
                     litigation, legislation or other political events, local
                     business or economic conditions, or the bankruptcy of the
                     issuer could have a significant effect on an issuer's
                     ability to make payments of principal and/or interest.

High Yield Risk      Each Portfolio, through its investments in high yield
                     securities and unrated securities of similar credit quality
                     (commonly known as "junk bonds"), may be subject to greater
                     levels of interest rate, credit and liquidity risk than
                     portfolios that do not invest in such securities. High
                     yield securities are considered predominantly speculative
                     with respect to the issuer's continuing ability to make
                     principal and interest payments. An economic downturn or
                     period of rising interest rates could adversely affect the
                     market for high yield securities and reduce the Portfolio's
                     ability to sell its high yield securities (liquidity risk).

Market Risk          The market price of securities owned by a Portfolio may go
                     up or down, sometimes rapidly or unpredictably. Securities
                     may decline in value due to factors affecting securities
                     markets generally or particular industries represented in
                     the securities markets. The value of a security may decline
                     due to general market conditions which are not specifically
                     related to a particular company, such as real or perceived
                     adverse economic conditions, changes in the general outlook
                     for corporate earnings, changes in interest or currency
                     rates or adverse investor sentiment generally. They may
                     also decline due to factors which affect a particular
                     industry or industries, such as labor shortages or
                     increased production costs and competitive conditions
                     within an industry.

Issuer Risk          The value of a security may decline for a number of reasons
                     which directly relate to the issuer, such as management
                     performance, financial leverage and reduced demand for the
                     issuer's goods and services.


Liquidity Risk       Liquidity risk exists when particular investments are
                     difficult to purchase or sell, possibly preventing a
                     Portfolio from selling such illiquid securities at an
                     advantageous time or price. The FISH: Series C's
                     investments in foreign securities, and each of the
                     Portfolio's investments in derivatives or securities with
                     substantial market and/or credit risk, tend to have the
                     greatest exposure to liquidity risk.


Derivatives Risk     Each Portfolio may use derivatives, which are financial
                     contracts whose value depends on, or is derived from, the
                     value of an underlying asset, reference rate or index. The
                     various derivative instruments that the Portfolios may use
                     are referenced under "Characteristics and Risks of
                     Securities and Investment Techniques--Derivatives" in this
                     Prospectus and described in more detail under "Investment
                     Objectives


                                      -7-
<PAGE>

                     and Policies" in the Statement of Additional Information.
                     The Portfolios may sometimes use derivatives as part of a
                     strategy designed to reduce exposure to other risks, such
                     as interest rate or currency risk. The Portfolios may also
                     use derivatives for leverage, in which case their use would
                     involve leveraging risk. A Portfolio's use of derivative
                     instruments may involve risks different from, or greater
                     than, the risks associated with investing directly in
                     securities and other traditional investments. Derivatives
                     are subject to a number of risks described elsewhere in
                     this section, such as liquidity risk, interest rate risk,
                     market risk, credit risk and management risk. They also
                     involve the risk of mispricing or improper valuation and
                     the risk that changes in the value of the derivative may
                     not correlate perfectly with the underlying asset, rate or
                     index. A Portfolio investing in a derivative instrument
                     could lose more than the principal amount invested. Also,
                     suitable derivative transactions may not be available in
                     all circumstances and there can be no assurance that a
                     Portfolio will engage in these transactions to reduce
                     exposure to other risks when that would be beneficial. In
                     addition, a Portfolio's use of derivatives may increase the
                     taxes payable by shareholders.

Mortgage Risk        The FISH: Series M, which purchases mortgage-related and
                     other asset-backed securities, is subject to certain
                     additional risks. Rising interest rates tend to extend the
                     duration of mortgage-related and other asset-backed
                     securities, making them more sensitive to changes in
                     interest rates. As a result, in a period of rising interest
                     rates, a Portfolio that holds mortgage-related and other
                     asset-backed securities may exhibit additional volatility.
                     This is known as extension risk. In addition,
                     mortgage-related securities are subject to prepayment risk.
                     When interest rates decline, borrowers may pay off their
                     mortgages sooner than expected. This can reduce the returns
                     of the Portfolio because it will have to reinvest that
                     money at the lower prevailing interest rates.

Foreign Investment   The FISH: Series C, which invests in part in foreign fixed
Risk                 income securities, may experience more rapid and extreme
                     changes in value than a portfolio that invests exclusively
                     in fixed income securities of U.S. companies. The
                     securities markets of many foreign countries are relatively
                     small, with a limited number of companies representing a
                     small number of industries. Additionally, issuers of
                     foreign securities are usually not subject to the same
                     degree of regulation as U.S. issuers. Reporting, accounting
                     and auditing standards of foreign countries differ, in some
                     cases significantly, from U.S. standards. Also,
                     nationalization, expropriation or confiscatory taxation,
                     currency blockage, political changes or diplomatic
                     developments could adversely affect the Portfolio's
                     investments in a foreign country. In the event of
                     nationalization, expropriation or other confiscation, the
                     Portfolio could lose its entire investment in foreign
                     securities. Adverse conditions in a certain region can
                     adversely affect securities of other countries whose
                     economies appear to be unrelated. To the extent that the
                     Portfolio invests a significant portion of its assets in a
                     concentrated geographic area like Eastern Europe or Asia,
                     the Portfolio will generally have more exposure to regional
                     economic risks associated with foreign investments.



Emerging Markets     Because the FISH: Series C may invest to a limited
Risk                 extent in emerging market fixed income securities of
                     issuers based in countries with developing economies,
                     foreign investment risk may be particularly high.
                     These securities may present market, credit, currency,
                     liquidity, legal, political and other risks different
                     from, or greater than, the risks of investing in
                     developed foreign countries.


Currency Risk        Because the FISH: Series C invests directly in foreign
                     currencies or in securities that trade in, and receive
                     revenues in, foreign currencies, it is subject to the risk
                     that those currencies will decline in value relative to the
                     U.S. Dollar, or, in the case of hedging positions, that the
                     U.S. Dollar will decline in value relative to the currency
                     being hedged. Currency rates in foreign countries may
                     fluctuate significantly over short periods of time for a
                     number of reasons, including changes in interest rates,
                     intervention (or the failure to intervene) by U.S. or
                     foreign governments, central banks or supranational
                     entities such as the International Monetary Fund, and by
                     the imposition of currency controls or other political
                     developments in the U.S. or abroad.


Non-diversification  Focusing investments in a small number of issuers
Risk                 increases risk. Each Portfolio is "non-diversified,"
                     which means that it may invest a greater percentage
                     of its assets in the securities of a single issuer
                     than "diversified" funds. Portfolios that invest in a
                     relatively small number of issuers are more susceptible
                     to risks associated with a single economic, political
                     or regulatory occurrence than a more diversified portfolio
                     might be. Some of those issuers also may present
                     substantial credit or other risks.


Leveraging Risk      Each of the Portfolios may engage in transactions that give
                     rise to a form of leverage. Such transactions may include,
                     among others, reverse repurchase agreements, loans of
                     portfolio securities, and the use

                                      -8-
<PAGE>

                     of when-issued, delayed delivery or forward commitment
                     transactions. The use of derivatives may also create
                     leveraging risk. To mitigate leveraging risk, PIMCO will
                     segregate liquid assets or otherwise cover the transactions
                     that may give rise to such risk. The use of leverage may
                     cause a Portfolio to liquidate portfolio positions when it
                     may not be advantageous to do so to satisfy its obligations
                     or to meet segregation requirements. Leverage, including
                     borrowing, will cause a Portfolio to be more volatile than
                     if the Portfolio had not been leveraged. This is because
                     leverage tends to exaggerate the effect of any increase or
                     decrease in the value of a Portfolio's securities.

Smaller Company      The general risks associated with fixed income securities
Risk                 are particularly pronounced for securities issued by
                     companies with smaller market capitalizations. These
                     companies may have limited product lines, markets or
                     financial resources or may depend on a few key
                     employees. As a result, they may be subject to greater
                     levels of credit, market and issuer risk. Securities of
                     smaller companies may trade less frequently and in lesser
                     volumes than more widely held securities, and their values
                     may fluctuate more sharply than other securities. Companies
                     with medium-sized market capitalizations may have risks
                     similar to those of smaller companies.

Management Risk      Each Portfolio is subject to management risk because it is
                     an actively managed investment portfolio. Each Portfolio's
                     sub-adviser and each individual portfolio manager will
                     apply investment techniques and risk analyses in making
                     investment decisions for the Portfolios, but there can be
                     no guarantee that these will produce the desired results.

                     Management of the Portfolios
Investment Adviser,  PIMCO Advisors L.P. serves as the investment adviser for
Sub-adviser and      the Portfolios. Pacific Investment Management Company
Administrator        ("PIMCO") serves as the sub-adviser for the Portfolios.
                     PIMCO Advisory Services serves as the administrator and
                     sole trading desk for purchases and redemptions of
                     Portfolio shares. Subject to the supervision of the Board
                     of Trustees, PIMCO is responsible for managing the
                     investment activities of the Portfolios, PIMCO Advisors
                     L.P. is responsible for managing the Portfolios' business
                     affairs, and PIMCO Advisory Services, in its role as the
                     administrator, is responsible for other administrative
                     matters.

                          PIMCO Advisors L.P. is located at 800 Newport Center
                     Drive, Newport Beach, California 92660. Organized in 1987,
                     PIMCO Advisors L.P. provides investment management and
                     advisory services to private accounts of institutional and
                     individual clients and to mutual funds. As of December 31,
                     1999, PIMCO Advisors L.P. and its subsidiary partnerships
                     had more than $260 billion in assets under management.

                          PIMCO is located at 840 Newport Center Drive, Newport
                     Beach, California 92660. Organized in 1971, PIMCO provides
                     investment management and advisory services to private
                     accounts of institutional and individual clients and to
                     mutual funds. As of December 31, 1999, PIMCO had
                     approximately $186 billion in assets under management.

                          PIMCO Advisory Services is located at 1345 Avenue of
                     the Americas, New York, New York 10105.

Advisory Fees        Neither Portfolio pays any advisory or other fees.

Individual           A team of investment professionals, led by William H.
Portfolio Managers   Gross, a founding partner of PIMCO, has had primary
                     responsibility for managing the Portfolios since their
                     inception. For the past five years, Mr. Gross has been
                     Managing Director and Chief Investment Officer of PIMCO.
Distributor          The Portfolios' Distributor is PIMCO Funds Distributors
                     LLC, a wholly owned subsidiary of PIMCO Advisors. The
                     Distributor, located at 2187 Atlantic Street, Stamford,
                     Connecticut 06902, is a broker-dealer registered with the
                     SEC.

                     Purchases and Redemptions


                                      -9-
<PAGE>

Purchasing Shares    Investors may purchase Portfolio shares at the relevant net
                     asset value of that Portfolio without a sales charge or
                     other fee.

                     Shares of the Portfolios are offered exclusively to
                     registered investment advisers approved by PIMCO Advisory
                     Services.

                     o Timing of Purchase Orders and Share Price Calculations. A
                     purchase order initiated by PIMCO Advisory Services, in its
                     role as the trading desk, prior to 4:00 p.m., Eastern
                     time, on a day the Portfolios are open for business, will
                     be effected at that day's net asset value. An order
                     received after 4:00 p.m., Eastern time will be effected at
                     the net asset value determined on the next business day.
                     The Portfolios are "open for business" on each day the
                     New York Stock Exchange is open for trading. Purchase
                     orders will be accepted only on days on which the
                     Portfolios are open for business.


                     o Initial Investment. Registered investment advisers may
                     open an account by submitting an executed Client Agreement,
                     a copy of which is mailed to PIMCO Advisory Services at
                     1345 Avenue of the Americas, New York, New York 10105.
                     There are no maximum or minimum initial investment
                     requirements.


                     o Additional Investments. Additonal shares can be purchased
                     only through PIMCO Advisory Services, and payment must be
                     wired in federal funds to the transfer agent.

                     o Other Purchase Information. Purchases of a Portfolio's
                     shares will be made only in full shares. Certificates for
                     shares will not be issued. The payment for shares to be
                     purchased shall be wired to the Portfolio's transfer agent.

                          Each of the Portfolios, acting through PIMCO Advisory
                     Services, in its role as the administrator, reserves the
                     right, in its sole discretion, to suspend the offering of
                     shares of the Portfolios or to reject any purchase order,
                     in whole or in part, when, in the judgment of management,
                     such suspension or rejection is in the best interests of
                     the Portfolios.

                          An investor should invest in the Portfolios for
                     long-term investment purposes only. The Portfolios, acting
                     through PIMCO Advisory Services, in its role as the
                     administrator, each reserve the right to restrict purchases
                     of Portfolio shares when a pattern of frequent purchases
                     and sales made in response to short-term fluctuations in
                     share price appears evident. Notice of any such
                     restrictions, if any, will vary according to the particular
                     circumstances.

                     o Redemption by Electronic Transmission. Shares can be
                     redeemed only through PIMCO Advisory Services, in its role
                     as the trading desk.


                     o Other Redemption Information. Redemption requests for
                     Portfolio shares are effected at the net asset value per
                     share next determined after receipt of a redemption request
                     by PIMCO Advisory Services, in its role as the trading
                     desk. A redemption request received by the transfer agent
                     prior to 4:00 p.m., Eastern time, on a day the Portfolios
                     are open for business, is effected on that day. A
                     redemption request received

                                      -10-
<PAGE>

                     after that time is effected on the next business day.

                            Redemption proceeds will be wired to the registered
                     investment adviser within one business day after the
                     redemption request, but may take up to three business days.
                     Redemption proceeds will be sent by wire only. The
                     Portfolios may suspend the right of redemption or postpone
                     the payment date at times when the New York Stock Exchange
                     is closed, or during certain other periods as permitted
                     under the federal securities laws.

                            Each Portfolio reserves the right to redeem shares
                     of any registered investment adviser at the then-current
                     value of such shares (which will be paid promptly to the
                     registered investment adviser) if the registered investment
                     adviser is no longer approved by PIMCO Advisory Services. A
                     registered investment adviser will receive advance notice
                     of any such mandatory redemption.

                            It is highly unlikely that shares would ever be
                     redeemed in kind. However, in consideration of the best
                     interests of the remaining investors, each Portfolio
                     reserves the right to pay any redemption proceeds exceeding
                     this amount in whole or in part by a distribution in kind
                     of securities held by the Portfolio in lieu of cash. Each
                     Portfolio agrees to redeem shares solely in cash up to the
                     lesser of $250,000 or 1% of the Portfolio's net assets
                     during any 90-day period for any one registered investment
                     adviser. When shares are redeemed in kind, the redeeming
                     registered investment adviser should expect to incur
                     transaction costs upon the disposition of the securities
                     received in the distribution.

                      How Portfolio Shares Are Priced

                      The net asset value of a Portfolio's shares is determined
                      by dividing the total value of a Portfolio's investments
                      and other assets attributable to that Portfolio, less any
                      liabilities, by the total number of shares outstanding of
                      that Portfolio.

                         For purposes of calculating net asset value,
                     portfolio securities and other assets for which market
                     quotes are available are stated at market value. Market
                     value is generally determined on the basis of last reported
                     sales prices or, if no sales are reported, based on quotes
                     obtained from a quotation reporting system, established
                     market makers, or pricing services. Certain securities or
                     investments for which daily market quotations are not
                     readily available may be valued, pursuant to guidelines
                     established by the Board of Trustees, with reference to
                     other securities or indices. Short-term investments having
                     a maturity of 60 days or less are generally valued at
                     amortized cost. Exchange traded options, futures and
                     options on futures are valued at the settlement price
                     determined by the exchange. Other securities for which
                     market quotes are not readily available are valued at fair
                     value as determined in good faith by the Board of Trustees
                     or persons acting at their direction.

                            Investments initially valued in foreign currencies
                     are converted to U.S. dollars using foreign exchange rates
                     obtained from pricing services. As a result, the net asset
                     value of a Portfolio's shares may be affected by changes in
                     the value of foreign currencies in relation to the U.S.
                     dollar. The value of securities traded in foreign markets
                     or denominated in foreign currencies may be affected
                     significantly on a day that the New York Stock Exchange is
                     closed and an investor is not able to buy or redeem shares.

                            Portfolio shares are valued at 4:00 p.m., Eastern
                     time on each day that the New York Stock Exchange and the
                     Portfolios are open. For purposes of calculating the net
                     asset value, information that becomes known to the
                     Portfolios or their agents after the net asset value has
                     been calculated on a particular day will not generally be
                     used to retroactively adjust the price of a security or the
                     net asset value determined earlier that day.

                            In unusual circumstances, instead of valuing
                     securities in the usual manner, the Portfolios may value
                     securities at fair value or estimate their value as
                     determined in good faith by the Board of Trustees,
                     generally based upon recommendations provided by PIMCO.
                     Fair valuation may also be used if extraordinary events
                     occur after the close of the relevant market but prior to
                     4:00 p.m. Eastern time.

                     Portfolio Distributions

                     Each Portfolio distributes substantially all of its net
                     investment income to shareholders investing in the
                     Portfolio in the form of dividends. An investment in
                     Portfolio shares begins earning dividends on the

                                      -11-
<PAGE>

                     shares the day after the Portfolio receives the related
                     purchase payment. Dividends are paid monthly on the last
                     business day of the month.

                          In addition, each Portfolio distributes any net
                     capital gains it earns from the sale of portfolio
                     securities to shareholders investing in the Portfolio no
                     less frequently than annually. Net short-term capital gains
                     may be paid more frequently.

                          A Portfolio's dividend and capital gain distributions
                     will be paid only in cash. Dividends will not reinvest.

                     Tax Consequences

                     o Taxes on Portfolio Distributions. A shareholder subject
                     to U.S. federal income tax will be subject to tax on
                     Portfolio distributions. For federal income tax purposes,
                     Portfolio distributions will be taxable to the shareholder
                     as either ordinary income or capital gains.

                          Portfolio dividends (i.e., distributions of investment
                     income) are taxable to shareholders investing in the
                     Portfolio as ordinary income. Federal taxes on Portfolio
                     distributions of gains are determined by how long the
                     Portfolio owned the investments that generated the gains,
                     rather than how long a shareholder has owned the shares.
                     Distributions of gains from investments that a Portfolio
                     owned for more than 12 months will generally be taxable to
                     shareholders as capital gains. Distributions of gains from
                     investments that the Portfolio owned for 12 months or less
                     will generally be taxable as ordinary income.

                          Portfolio distributions are taxable to shareholders
                     even if they are paid from income or gains earned by a
                     Portfolio prior to the shareholder's investment and thus
                     were included in the price paid for the shares. For
                     example, a shareholder who purchases shares on or just
                     before the record date of a Portfolio distribution will pay
                     full price for the shares and may receive a portion of his
                     or her investment back as a taxable distribution.

                          A Portfolio's investment in certain debt obligations
                     (including obligations issued with market discount,
                     zero-coupon bonds, pay-in-kind securities, catastrophe
                     bonds, and metal-indexed notes) may cause the Portfolio to
                     recognize taxable income in excess of the cash generated by
                     such obligations. Thus, the Portfolio could be required at
                     times to liquidate other investments in order to distribute
                     all of its net income and gain annually.

                          The FISH: Series C's investment in foreign securities
                     may be subject to foreign withholding taxes. In that case,
                     the Portfolio's yield on these securities would be
                     decreased. Shareholders generally will not be entitled to
                     claim a credit or deduction with respect to foreign taxes.
                     In addition, the Portfolio's investment in foreign
                     securities or foreign currencies may increase or accelerate
                     the Portfolio's recognition of ordinary income and may
                     affect the timing or amount of the Portfolio's
                     distributions.

                     o Taxes on Redemption of Shares. Any gain resulting from
                     the sale of Portfolio shares will generally be subject to
                     federal income tax.

                          This section relates only to federal income tax; the
                     consequences under other tax laws may differ. Shareholders
                     should consult their tax advisors as to the possible
                     application of foreign, state and local income tax laws to
                     Portfolio dividends and capital distributions. Please see
                     the Statement of Additional Information for additional
                     information regarding the tax aspects of investing in the
                     Portfolios.

                     Characteristics and Risks of
                     Securities and Investment Techniques

                     This section provides additional information about some of
                     the principal investments and related risks of the
                     Portfolios described under "Summary Information" above. It
                     also describes characteristics and risks of additional
                     securities and investment techniques that may be used by
                     the Portfolios from time to time. Most of these securities
                     and investment techniques are discretionary, which means
                     that PIMCO can decide whether to use them or not. This
                     Prospectus does not attempt to disclose all of the various
                     types

                                      -12-
<PAGE>
                     of securities and investment techniques that may be used by
                     the Portfolios. As with any portfolio, investors in the
                     Portfolios rely on the professional investment judgment and
                     skill of PIMCO and the individual portfolio managers.
                     Please see "Investment Objectives and Policies" in the
                     Statement of Additional Information for more detailed

                     information about the securities and investment techniques
                     described in this section and about other strategies and
                     techniques that may be used by the Portfolios.

Securities           The total return sought by a Portfolio consists of both
Selection            income earned on a Portfolio's investments and capital
                     appreciation, if any, arising from increases in the market
                     value of a Portfolio's holdings. Capital appreciation of
                     fixed income securities generally results from decreases in
                     market interest rates or improving credit fundamentals for
                     a particular market sector or security.

                          In determining what securities to buy or sell for a
                     Portfolio, PIMCO develops an outlook for interest rates,
                     foreign currency exchange rates and the economy, analyzes
                     credit and call risks, and uses other security selection
                     techniques. The proportion of a Portfolio's assets
                     committed to investment in securities with particular
                     characteristics (such as quality, sector, interest rate or
                     maturity) varies based on PIMCO's outlook for the U.S. and
                     foreign economies, the financial markets and other factors.
                     A Portfolio will sell a security when PIMCO believes the
                     Portfolio is more likely to achieve its objective by
                     investing the proceeds elsewhere.
                      PIMCO attempts to identify areas of the bond market
                     that are undervalued relative to the rest of the market.
                     PIMCO identifies these areas by grouping bonds into the
                     following sectors: money markets, governments, corporates,
                     mortgages, asset-backed and international. Sophisticated
                     proprietary software then assists in evaluating sectors and
                     pricing specific securities. Once investment opportunities
                     are identified, PIMCO will shift assets among sectors
                     depending upon changes in relative valuations and credit
                     spreads. There is no guarantee that PIMCO's security
                     selection techniques will produce the desired results.

U.S. Government      U.S. Government securities are obligations of, or
Securities           guaranteed by, the U.S. Government, its agencies or
                     instrumentalities. U.S. Government securities are subject
                     to market and interest rate risk, and may be subject to
                     varying degrees of credit risk. U.S. Government securities
                     include zero coupon securities, which tend to be subject to
                     greater market risk than interest-paying securities of
                     similar maturities.

Corporate Debt       Corporate debt securities are subject to the risk of the
Securities           issuer's inability to meet principal and interest payments
                     on the obligation and may also be subject to price
                     volatility due to such factors as interest rate
                     sensitivity, market perception of the creditworthiness of
                     the issuer and general market liquidity. When interest
                     rates rise, the value of corporate debt securities can be
                     expected to decline. Debt securities with longer maturities
                     tend to be more sensitive to interest rate movements than
                     those with shorter maturities.

Variable and         Variable and floating rate securities provide for a
Floating Rate        periodic adjustment in the interest rate paid on the
Securities           obligations. Each Portfolio may invest in floating rate
                     debt instruments and engage in credit spread trades. While
                     floating rate debt instruments provide a certain degree of
                     protection against rises in interest rates, a Portfolio
                     will participate in any declines in interest rates as well.
                     Each Portfolio may also invest in inverse floating rate
                     debt instruments. An inverse floating rate debt instrument
                     may exhibit greater price volatility than a fixed rate
                     obligation of similar credit quality. A Portfolio may not
                     invest more than 40% of its net assets in any combination
                     of inverse floating rate debt instruments, interest-only,
                     or principal-only securities.

Foreign Securities   Investing in foreign securities involves special risks and
                     considerations not typically associated with investing in
                     U.S. securities. Registered investment advisers should
                     consider carefully the substantial risks involved for the
                     FISH: Series C, which invests in securities issued by
                     foreign companies and governments of foreign countries.
                     These risks include: differences in accounting, auditing
                     and financial reporting standards; generally higher
                     commission rates on foreign portfolio transactions; the
                     possibility of nationalization, expropriation or
                     confiscatory taxation; adverse changes in investment or
                     exchange control regulations; and political instability.
                     Individual foreign economies may differ favorably or
                     unfavorably from the U.S. economy in such respects as
                     growth of gross domestic product, rates of inflation,
                     capital reinvestment, resources, self-sufficiency and
                     balance of payments position. The securities markets,
                     values of securities, yields and risks associated with
                     foreign securities markets may change independently of each
                     other. Also, foreign securities and dividends and interest
                     payable on those securities may be subject to foreign
                     taxes, including taxes withheld from payments on those
                     securities. Foreign securities often trade with less
                     frequency and volume than domestic securities and therefore
                     may


                                      -13-
<PAGE>

                     exhibit greater price volatility. Investments in foreign
                     securities may also involve higher custodial costs than
                     domestic investments and additional transaction costs with
                     respect to foreign currency conversions. Changes in foreign
                     exchange rates also will affect the value of securities
                     denominated or quoted in foreign currencies.


                          Emerging Market Securities. The FISH: Series C may
                     invest up to 15% of its assets in securities of issuers
                     based in developing (or "emerging market") countries.
                     Investing in emerging market securities imposes risks
                     different from, or greater than, risks of investing in
                     domestic securities or in foreign, developed countries.
                     These risks include: smaller market capitalization of
                     securities markets, which may suffer periods of relative
                     illiquidity; significant price volatility; restrictions on
                     foreign investment and possible repatriation of investment
                     income and capital. In addition, foreign investors may be
                     required to register the proceeds of sales; future economic
                     or political crises could lead to price controls, forced
                     mergers, expropriation or confiscatory taxation, seizure,
                     nationalization, or creation of government monopolies. The
                     currencies of emerging market countries may experience
                     significant declines against the U.S. dollar, and
                     devaluation may occur subsequent to investments in these
                     currencies by a Portfolio. Inflation and rapid fluctuations
                     in inflation rates have had, and may continue to have,
                     negative effects on the economies and securities markets of
                     certain emerging market countries.

                          Additional risks of emerging markets securities may
                     include: greater social, economic and political uncertainty
                     and instability; more substantial governmental involvement
                     in the economy; less governmental supervision and
                     regulation; unavailability of currency hedging techniques;
                     companies that are newly organized and small; differences
                     in auditing and financial reporting standards, which may
                     result in unavailability of material information about
                     issuers; and less developed legal systems. In addition,
                     emerging securities markets may have different clearance
                     and settlement procedures, which may be unable to keep pace
                     with the volume of securities transactions or otherwise
                     make it difficult to engage in such transactions.
                     Settlement problems may cause a Portfolio to miss
                     attractive investment opportunities, hold a portion of its
                     assets in cash pending investment, or be delayed in
                     disposing of a portfolio security. Such a delay could
                     result in possible liability to a purchaser of the
                     security.

                          The FISH: Series C may invest in Brady Bonds, which
                     are securities created through the exchange of existing
                     commercial bank loans to sovereign entities for new
                     obligations in connection with a debt restructuring.
                     Investments in Brady Bonds may be viewed as speculative.
                     Brady Bonds acquired by the Portfolio may be subject to
                     restructuring arrangements or to requests for new credit,
                     which may cause the Portfolio to suffer a loss of interest
                     or principal on any of its holdings.

Foreign Currencies   The FISH: Series C, which may invest directly in foreign
                     currencies or in securities that trade in, or receive
                     revenues in, foreign currencies, is subject to currency
                     risk. Foreign currency exchange rates may fluctuate
                     significantly over short periods of time. They generally
                     are determined by supply and demand in the foreign exchange
                     markets and the relative merits of investments in different
                     countries, actual or perceived changes in interest rates
                     and other complex factors. Currency exchange rates also can
                     be affected unpredictably by intervention (or the failure
                     to intervene) by U.S. or foreign governments or central
                     banks, or by currency controls or political developments.
                     For example, significant uncertainty surrounds the recent
                     introduction of the euro (a common currency unit for the
                     European Union) in January 1999 and the effect it may have
                     on the value of securities denominated in local European
                     currencies. These and other currencies in which the
                     Portfolio's assets are denominated may be devalued against
                     the U.S. dollar, resulting in a loss to the Portfolio.

                          Foreign Currency Transactions. The FISH: Series C may
                     enter into forward foreign currency exchange contracts and
                     invest in foreign currency futures contracts and options on
                     foreign currencies and futures. A forward foreign currency
                     exchange contract, which involves an obligation to purchase
                     or sell a specific currency at a future date at a price set
                     at the time of the contract, reduces the Portfolio's
                     exposure to changes in the value of the currency it will
                     deliver and increases its exposure to changes in the value
                     of the currency it will receive for the duration of the
                     contract. The effect on the value of the Portfolio is
                     similar to selling securities denominated in one currency
                     and purchasing securities denominated in another currency.
                     A contract to sell foreign currency would limit any
                     potential gain which might be


                                      -14-
<PAGE>

                     realized if the value of the hedged currency increases. The
                     Portfolio may enter into these contracts to hedge against
                     foreign exchange risk, to increase exposure to a foreign
                     currency or to shift exposure to foreign currency
                     fluctuations from one currency to another. Suitable hedging
                     transactions may not be available in all circumstances, and
                     there can be no assurance that the Portfolio will engage in
                     such transactions at any given time or from time to time.
                     Also, such transactions may not be successful and may
                     eliminate any chance for a Portfolio to benefit from
                     favorable fluctuations in relevant foreign currencies. The
                     Portfolio may use one currency (or a basket of currencies)
                     to hedge against adverse changes in the value of another
                     currency (or basket of currencies) when exchange rates
                     between the two currencies are positively correlated. The
                     Portfolio will segregate assets determined to be liquid by
                     PIMCO in accordance with procedures established by the
                     Board of Trustees to cover its obligations under forward
                     foreign currency exchange contracts entered into for
                     non-hedging purposes.

High Yield           Securities rated lower than Baa by Moody's Investors
Securities           Service, Inc. or lower than BBB by Standard & Poor's
                     Ratings Services are sometimes referred to as "high yield"
                     or "junk" bonds. Investing in high yield securities
                     involves special risks in addition to the risks associated
                     with investments in higher-rated fixed income securities.
                     While offering a greater potential opportunity for capital
                     appreciation and higher yields, high yield securities
                     typically entail greater potential price volatility and may
                     be less liquid than higher-rated securities. High yield
                     securities may be regarded as predominantly speculative
                     with respect to the issuer's continuing ability to meet
                     principal and interest payments. They may also be more
                     susceptible to real or perceived adverse economic and
                     competitive industry conditions than higher-rated
                     securities.

                          Credit Ratings and Unrated Securities. Rating agencies
                     are private services that provide ratings of the credit
                     quality of fixed income securities, including convertible
                     securities. Appendix A to the Prospectus describes the
                     various ratings assigned to fixed income securities by
                     Moody's and S&P. Ratings assigned by a rating agency are
                     not absolute standards of credit quality and do not
                     evaluate market risks. Rating agencies may fail to make
                     timely changes in credit ratings, and an issuer's current
                     financial condition may be better or worse than a rating
                     indicates. A Portfolio will not necessarily sell a security
                     when its rating is reduced below its rating at the time of
                     purchase. PIMCO does not rely solely on credit ratings, and
                     develops its own analysis of issuer credit quality.

                          A Portfolio may purchase unrated securities (which are
                     not rated by a rating agency) if its portfolio manager
                     determines that the security is of comparable quality to a
                     rated security that the Portfolio may purchase. Unrated
                     securities may be less liquid than comparable rated
                     securities and involve the risk that the portfolio manager
                     may not accurately evaluate the security's comparative
                     credit rating. Analysis of the creditworthiness of issuers
                     of high yield securities may be more complex than for
                     issuers of higher-quality fixed income securities. To the
                     extent that a Portfolio invests in high yield and/or
                     unrated securities, the Portfolio's success in achieving
                     its investment objective may depend more heavily on the
                     portfolio manager's creditworthiness analysis than if the
                     Portfolio invested exclusively in higher-quality and rated
                     securities.

Inflation-Indexed    Inflation-indexed bonds are fixed income securities whose
Bonds                principal value is periodically adjusted according to the
                     rate of inflation. If the index measuring inflation falls,
                     the principal value of inflation-indexed bonds will be
                     adjusted downward, and consequently the interest payable on
                     these securities (calculated with respect to a smaller
                     principal amount) will be reduced. Repayment of the
                     original bond principal upon maturity (as adjusted for
                     inflation) is guaranteed in the case of U.S. Treasury
                     inflation-indexed bonds. For bonds that do not provide a
                     similar guarantee, the adjusted principal value of the bond
                     repaid at maturity may be less than the original principal.
                     The value of inflation-indexed bonds is expected to change
                     in response to changes in real interest rates. Real
                     interest rates are tied to the relationship between nominal
                     interest rates and the rate of inflation. If nominal
                     interest rates increase at a faster rate than inflation,
                     real interest rates may rise, leading to a decrease in
                     value of inflation-indexed bonds. Short-term increases in
                     inflation may lead to a decline in value. Any increase in
                     the principal amount of an inflation-indexed bond will be
                     considered taxable ordinary income, even though investors
                     do not receive their principal until maturity.

Derivatives          Each Portfolio may, but is not required to, use derivative
                     instruments for risk management purposes or as part of its
                     investment strategies. Generally, derivatives are financial
                     contracts whose value depends upon or is derived from, the
                     value of an underlying asset, reference rate or index, and
                     may relate to stocks, bonds, interest rates, currencies or
                     currency exchange rates, commodities, and related indexes.
                     Examples of derivative instruments include options
                     contracts, futures contracts, options on futures contracts
                     and


                                      -15-
<PAGE>

                     swap agreements. Each Portfolio may invest all of its
                     assets in derivative instruments, subject to the
                     Portfolio's objectives and policies. A portfolio manager
                     may decide not to employ any of these strategies, and there
                     is no assurance that any derivatives strategy used by a
                     Portfolio will succeed. A description of these and other
                     derivative instruments that the Portfolios may use are
                     described under "Investment Objectives and Policies" in the
                     Statement of Additional Information.

                          A Portfolio's use of derivative instruments involves
                     risks different from, or greater than, the risks associated
                     with investing directly in securities and other more
                     traditional investments. A description of various risks
                     associated with particular derivative instruments is
                     included in "Investment Objectives and Policies" in the
                     Statement of Additional Information. The following provides
                     a more general discussion of important risk factors
                     relating to all derivative instruments that may be used by
                     the Portfolios.

                          Management Risk. Derivative products are highly
                     specialized instruments that require investment techniques
                     and risk analyses different from those associated with
                     stocks and bonds. The use of a derivative requires an
                     understanding not only of the underlying instrument but
                     also of the derivative itself, without the benefit of
                     observing the performance of the derivative under all
                     possible market conditions.

                          Credit Risk. The use of a derivative instrument
                     involves the risk that a loss may be sustained as a result
                     of the failure of another party to the contract (usually
                     referred to as a "counterparty") to make required payments
                     or otherwise comply with the contract's terms.

                          Liquidity Risk. Liquidity risk exists when a
                     particular derivative instrument is difficult to purchase
                     or sell. If a derivative transaction is particularly large
                     or if the relevant market is illiquid (as is the case with
                     many privately negotiated derivatives), it may not be
                     possible to initiate a transaction or liquidate a position
                     at an advantageous time or price.

                          Leverage Risk. Because many derivatives have a
                     leverage component, adverse changes in the value or level
                     of the underlying asset, reference rate or index can result
                     in a loss substantially greater than the amount invested in
                     the derivative itself. Certain derivatives have the
                     potential for unlimited loss, regardless of the size of the
                     initial investment. When a Portfolio uses derivatives for
                     leverage, investments in that Portfolio will tend to be
                     more volatile, resulting in larger gains or losses in
                     response to market changes. To limit leverage risk, each
                     Portfolio will segregate assets determined to be liquid by
                     PIMCO in accordance with procedures established by the
                     Board of Trustees (or, as permitted by applicable
                     regulation, enter into certain offsetting positions) to
                     cover its obligations under derivative instruments.

                          Lack of Availability. Because the markets for certain
                     derivative instruments (including markets located in
                     foreign countries) are relatively new and still developing,
                     suitable derivatives transactions may not be available in
                     all circumstances for risk management or other purposes.
                     There is no assurance that a Portfolio will engage in
                     derivatives transactions at any time or from time to time.
                     A Portfolio's ability to use derivatives may also be
                     limited by certain regulatory and tax considerations.

                          Market and Other Risks. Like most other investments,
                     derivative instruments are subject to the risk that the
                     market value of the instrument will change in a way
                     detrimental to a Portfolio's interest. If a portfolio
                     manager incorrectly forecasts the values of securities,
                     currencies or interest rates or other economic factors in
                     using derivatives for a Portfolio, the Portfolio might have
                     been in a better position if it had not entered into the
                     transaction at all. While some strategies involving
                     derivative instruments can reduce the risk of loss, they
                     can also reduce the opportunity for gain or even result in
                     losses by offsetting favorable price movements in other
                     Portfolio investments. A Portfolio may also have to buy or
                     sell a security at a disadvantageous time or price because
                     the Portfolio is legally required to maintain offsetting
                     positions or asset coverage in connection with certain
                     derivatives transactions.

                          Other risks in using derivatives include the risk of
                     mispricing or improper valuation of derivatives and the
                     inability of derivatives to correlate perfectly with
                     underlying assets, rates and indexes. Many derivatives, in
                     particular privately negotiated derivatives, are complex
                     and often valued subjectively. Improper valuations can
                     result in increased cash payment requirements to
                     counterparties or a loss of value to a Portfolio. Also, the
                     value of derivatives may not correlate perfectly, or at
                     all, with the value of the assets, reference rates or
                     indexes they are designed to closely track. In addition, a
                     Portfolio's use of derivatives may cause the Portfolio to
                     realize higher amounts of short-term capital gains (taxed
                     at


                                      -16-
<PAGE>

                     ordinary income tax rates when distributed) than if the
                     Portfolio had not used such instruments.
Convertible          Each Portfolio may invest in convertible securities.
Securities           Convertible securities are generally preferred stocks and
                     other securities, including fixed income securities and
                     warrants, that are convertible into or exercisable for
                     common stock at a stated price or rate. The price of a
                     convertible security will normally vary in some proportion
                     to changes in the price of the underlying common stock
                     because of this conversion or exercise feature. However,
                     the value of a convertible security may not increase or
                     decrease as rapidly as the underlying common stock. A
                     convertible security will normally also provide income and
                     is subject to interest rate risk. Convertible securities
                     may be lower-rated securities subject to greater levels of
                     credit risk. A Portfolio may be forced to convert a
                     security before it would otherwise choose, which may have
                     an adverse effect on the Portfolio's ability to achieve its
                     investment objective.

                          While the Portfolios intend to invest primarily in
                     fixed income securities, each may invest in convertible
                     securities or equity securities. While some countries or
                     companies may be regarded as favorable investments, pure
                     fixed income opportunities may be unattractive or limited
                     due to insufficient supply, or legal or technical
                     restrictions. In such cases, a Portfolio may consider
                     equity securities or convertible securities to gain
                     exposure to such investments.

Mortgage-Related     The FISH: Series M invests primarily in mortgage- or other
and Other            asset-backed securities. Mortgage-related securities
Asset-Backed         include mortgage pass-through securities, collateralized
Securities           mortgage obligations, commercial mortgage-backed
                     securities, mortgage dollar rolls, stripped mortgage-backed
                     securities and other securities that directly or indirectly
                     represent a participation in, or are secured by and payable
                     from, mortgage loans on real property.
                          The value of some mortgage- or asset-backed securities
                     may be particularly sensitive to changes in prevailing
                     interest rates. Early repayment of principal on some
                     mortgage-related securities may expose the Portfolio to a
                     lower rate of return upon reinvestment of principal. When
                     interest rates rise, the value of a mortgage-related
                     security generally will decline; however, when interest
                     rates are declining, the value of mortgage-related
                     securities with prepayment features may not increase as
                     much as other fixed income securities. The rate of
                     prepayments on underlying mortgages will affect the price
                     and volatility of a mortgage-related security, and may
                     shorten or extend the effective maturity of the security
                     beyond what was anticipated at the time of purchase. If
                     unanticipated rates of prepayment on underlying mortgages
                     increase the effective maturity of a mortgage-related
                     security, the volatility of the security can be expected to
                     increase. The value of these securities may fluctuate in
                     response to the market's perception of the creditworthiness
                     of the issuers. Additionally, although mortgages and
                     mortgage-related securities are generally supported by some
                     form of government or private guarantee and/or insurance,
                     there is no assurance that private guarantors or insurers
                     will meet their obligations.
                          One type of stripped mortgage-backed security has one
                     class receiving all of the interest from the mortgage
                     assets (the interest-only class), while the other class
                     will receive all of the principal (the principal-only
                     class). The yield to maturity on an interest-only class is
                     extremely sensitive to the rate of principal payments
                     (including prepayments) on the underlying mortgage assets,
                     and a rapid rate of principal payments may have a material
                     adverse effect on the Portfolio's yield to maturity from
                     these securities. The Portfolio may not invest more than
                     40% of its net assets in any combination of interest-only,
                     principal-only, or inverse floating rate securities. The
                     Portfolio may invest in other asset-backed securities that
                     have been offered to investors.

Municipal Bonds      Municipal bonds are generally issued by state and local
                     governments and their agencies, authorities and other
                     instrumentalities. Municipal bonds are subject to interest
                     rate, credit and market risk. The ability of an issuer to
                     make payments could be affected by litigation, legislation
                     or other political events or the bankruptcy of the issuer.
                     Lower rated municipal bonds are subject to greater credit
                     and market risk than higher quality municipal bonds.

Loan Participations  The FISH: Series C may invest in fixed- and floating-rate
and Assignments      loans, which investments generally will be in the form of
                     loan participations and assignments of portions of such
                     loans. Participations and assignments involve special types
                     of risk, including credit risk, interest rate risk,
                     liquidity risk, and the risks of being a lender. If the
                     Portfolio purchases a participation, it may only be able to
                     enforce its rights through the lender, and may assume the
                     credit risk of the lender in addition to the borrower.

Delayed Funding      The FISH: Series C may also enter into, or acquire
                     participations in, delayed funding loans


                                      -17-
<PAGE>

Loans and Revolving  and revolving credit facilities, in which a lender agrees
Credit Facilities    to make loans up to a maximum amount upon demand by the
                     borrower during a specified term. These commitments may
                     have the effect of requiring the Portfolio to increase its
                     investment in a company at a time when it might not
                     otherwise decide to do so (including at a time when the
                     company's financial condition makes it unlikely that such
                     amounts will be repaid). To the extent that the Portfolio
                     is committed to advance additional funds, it will segregate
                     assets determined to be liquid by PIMCO in accordance with
                     procedures established by the Board of Trustees in an
                     amount sufficient to meet such commitments. Delayed funding
                     loans and revolving credit facilities are subject to
                     credit, interest rate and liquidity risk and the risks of
                     being a lender.

Loans of Portfolio   For the purpose of achieving income, each Portfolio may
Securities           lend its portfolio securities to brokers, dealers, and
                     other financial institutions, provided that a number of
                     conditions are satisfied, including that the loan be fully
                     collateralized. Please see "Investment Objectives and
                     Policies" in the Statement of Additional Information for
                     details. When a Portfolio lends portfolio securities, its
                     investment performance will continue to reflect changes in
                     the value of the securities loaned, and the Portfolio will
                     also receive a fee or interest on the collateral.
                     Securities lending involves the risk of loss of rights in
                     the collateral or delay in recovery of the collateral if
                     the borrower fails to return the security loaned or becomes
                     insolvent. A Portfolio may pay lending fees to a party
                     arranging the loan.

Short Sales          Each Portfolio may make short sales as part of its overall
                     portfolio management strategies or to offset a potential
                     decline in value of a security. A short sale involves the
                     sale of a security that is borrowed from a broker or other
                     institution to complete the sale. For these purposes, a
                     Portfolio may also hold or have the right to acquire
                     securities which, without the payment of any further
                     consideration, are convertible into or exchangeable for the
                     securities sold short. Short sales expose a Portfolio to
                     the risk that it will be required to acquire, convert or
                     exchange securities to replace the borrowed securities
                     (also known as "covering" the short position) at a time
                     when the securities sold short have appreciated in value,
                     thus resulting in a loss to the Portfolio. A Portfolio
                     making a short sale (other than a "short sale against the
                     box") must segregate assets determined to be liquid by
                     PIMCO in accordance with procedures established by the
                     Board of Trustees or otherwise cover its position in a
                     permissible manner.

When-Issued,         Each Portfolio may purchase securities which it is eligible
Delayed Delivery     to purchase on a when-issued basis, may purchase and sell
and Forward          such securities for delayed delivery and may make contracts
Commitment           to purchase such securities for a fixed price at a future
Transactions         date beyond normal settlement time (forward commitments).
                     When-issued transactions, delayed delivery purchases and
                     forward commitments involve a risk of loss if the value of
                     the securities declines prior to the settlement date. This
                     risk is in addition to the risk that the Portfolio's other
                     assets will decline in value. Therefore, these transactions
                     may result in a form of leverage and increase a Portfolio's
                     overall investment exposure. Typically, no income accrues
                     on securities a Portfolio has committed to purchase prior
                     to the time delivery of the securities is made, although a
                     Portfolio may earn income on securities it has segregated
                     to cover these positions.

Repurchase           Each Portfolio may enter into repurchase agreements, in
Agreements           which the Portfolio purchases a security from a bank or
                     broker-dealer that agrees to repurchase the security at the
                     Portfolio's cost plus interest within a specified time. If
                     the party agreeing to repurchase should default, the
                     Portfolio will seek to sell the securities which it holds.
                     This could involve procedural costs or delays in addition
                     to a loss on the securities if their value should fall
                     below their repurchase price. Repurchase agreements
                     maturing in more than seven days are considered illiquid
                     securities.

Reverse Repurchase   Each Portfolio may enter into reverse repurchase agreements
Agreements, Dollar   and dollar rolls, subject to the Portfolio's limitations on
Rolls and Other      borrowings. A reverse repurchase agreement or dollar roll
Borrowings           involves the sale of a security by a Portfolio and its
                     agreement to repurchase the instrument at a specified time
                     and price, and may be considered a form of borrowing for
                     some purposes. A Portfolio will segregate assets determined
                     to be liquid by PIMCO in accordance with procedures
                     established by the Board of Trustees to cover its
                     obligations under reverse repurchase agreements. A
                     Portfolio also may borrow money for investment purposes
                     subject to any policies of the Portfolio currently
                     described in this Prospectus or in the Statement of
                     Additional Information. Reverse repurchase agreements,
                     dollar rolls and other forms of borrowings may create
                     leveraging risk for a Portfolio.

Catastrophe Bonds    Each Portfolio may invest in "catastrophe bonds," which are
                     fixed income securities for which the return of principal
                     and payment of interest is contingent on the non-occurrence
                     of a specific "trigger" catastrophic event, such as a
                     hurricane or an earthquake. If a trigger event occurs, a
                     Portfolio may lose a portion or all of its principal
                     invested in the bond. Catastrophe bonds often provide for
                     an extension of


                                      -18-
<PAGE>

                     maturity to process and audit loss claims where a trigger
                     event has, or possibly has, occurred. An extension of
                     maturity may increase volatility. Catastrophe bonds may
                     also expose the Portfolio to certain unanticipated risks
                     including credit risk, adverse regulatory or jurisdictional
                     interpretations, and adverse tax consequences. Catastrophe
                     bonds may also be subject to liquidity risk.

Portfolio Turnover   The length of time a Portfolio has held a particular
                     security is not generally a consideration in investment
                     decisions. A change in the securities held by a Portfolio
                     is known as "portfolio turnover." Each Portfolio may engage
                     in frequent and active trading of portfolio securities to
                     achieve its investment objective, particularly during
                     periods of volatile market movements. High portfolio
                     turnover (e.g., over 100%) involves correspondingly greater
                     expenses to a Portfolio, including brokerage commissions or
                     dealer mark-ups and other transaction costs on the sale of
                     securities and reinvestments in other securities. Such
                     sales may also result in realization of taxable capital
                     gains, including short-term capital gains (which are taxed
                     at ordinary income tax rates when distributed). The trading
                     costs and tax effects associated with portfolio turnover
                     may adversely affect a Portfolio's performance.

Illiquid Securities  Each Portfolio may invest up to 15% of its net assets in
                     illiquid securities. Certain illiquid securities may
                     require pricing at fair value as determined in good faith
                     under the supervision of the Board of Trustees. A portfolio
                     manager may be subject to significant delays in disposing
                     of illiquid securities, and transactions in illiquid
                     securities may entail registration expenses and other
                     transaction costs that are higher than those for
                     transactions in liquid securities. The term "illiquid
                     securities" for this purpose means securities that cannot
                     be disposed of within seven days in the ordinary course of
                     business at approximately the amount at which a Portfolio
                     has valued the securities. Restricted securities, i.e.,
                     securities subject to legal or contractual restrictions on
                     resale, may be illiquid. However, some restricted
                     securities (such as securities issued pursuant to Rule 144A
                     under the Securities Act of 1933 and certain commercial
                     paper) may be treated as liquid, although they may be less
                     liquid than registered securities traded on established
                     secondary markets.

Investment in Other  Each Portfolio may invest up to 10% of its assets in
Investment           securities of other investment companies, such as
Companies            closed-end management investment companies, or in pooled
                     accounts or other investment vehicles which invest in
                     foreign markets. As a shareholder of an investment company,
                     a Portfolio may indirectly bear service and other fees
                     which are in addition to the fees the Portfolio pays its
                     service providers.

Temporary Defensive  For temporary or defensive purposes, each Portfolio may
Strategies           invest without limit in U.S. debt securities, including
                     short-term money market securities, when PIMCO deems it
                     appropriate to do so. When a Portfolio engages in such
                     strategies, it may not achieve its investment objective.

Changes in           The investment objective of each Portfolio may be changed
Investment           by the Board of Trustees without the approval of the
Objectives and       registered investment advisers investing in the Portfolio.
Policies             Unless otherwise stated, all other investment policies of
                     the Portfolios may be changed by the Board of Trustees
                     without the approval of the registered investment advisers
                     investing in the Portfolios.

Percentage           Unless otherwise stated, all percentage limitations on
Investment           Portfolio investments listed in this Prospectus will apply
Limitations          at the time of investment. A Portfolio would not violate
                     these limitations unless an excess or deficiency were to
                     occur or exist immediately after and as a result of an
                     investment.

Other Investments    The Portfolios may invest in other types of securities and
and Techniques       use a variety of investment techniques and strategies which
                     are not described in this Prospectus. These securities and
                     techniques may subject the Portfolios to additional risks.
                     Please see the Statement of Additional Information for
                     additional information about the securities and investment
                     techniques described in this Prospectus and about
                     additional securities and techniques that may be used by
                     the Portfolios.


                                      -19-
<PAGE>

Appendix A           A Portfolio's investments may range in quality from
Description of       securities in the lowest category in which the Portfolio is
Securities Ratings   permitted to invest to securities rated in the highest
                     category (as rated by Moody's or S&P or, if unrated,
                     determined by PIMCO to be of comparable quality). The
                     percentage of a Portfolio's assets invested in securities
                     in a particular rating category will vary. The following
                     terms are generally used to describe the credit quality of
                     fixed income securities.

                     High Quality Debt Securities are those rated in one of the
                     two highest rating categories (the highest category for
                     commercial paper) or, if unrated, deemed comparable by
                     PIMCO.

                     Investment Grade Debt Securities are those rated in one of
                     the four highest rating categories or, if unrated, deemed
                     comparable by PIMCO.
                     Below Investment Grade, High Yield Securities are those
                     rated lower than Baa by Moody's or BBB by S&P and
                     comparable securities. They are deemed predominately
                     speculative with respect to the issuer's ability to repay
                     principal and interest.
                     Following is a description of Moody's and S&P's rating
                     categories applicable to fixed income securities.

Moody's Investors    Corporate and Municipal Bond Ratings
Service, Inc.
                     Aaa: Bonds which are rated Aaa are judged to be of the best
                     quality. They carry the smallest degree of investment risk
                     and are generally referred to as "gilt edge." Interest
                     payments are protected by a large or by an exceptionally
                     stable margin and principal is secure. While the various
                     protective elements are likely to change, such changes as
                     can be visualized are most unlikely to impair the
                     fundamentally strong position of such issues.

                     Aa: Bonds which are rated Aa are judged to be of high
                     quality by all standards. Together with the Aaa group they
                     comprise what are generally known as high-grade bonds. They
                     are rated lower than the best bonds because margins of
                     protection may not be as large as in Aaa securities or
                     fluctuation of protective elements may be of greater
                     amplitude or there may be other elements present that make
                     the long-term risks appear somewhat larger than with Aaa
                     securities.

                     A: Bonds which are rated A possess many favorable
                     investment attributes and are to be considered as
                     upper-medium-grade obligations. Factors giving security to
                     principal and interest are considered adequate but elements
                     may be present that suggest a susceptibility to impairment
                     sometime in the future.

                     Baa: Bonds which are rated Baa are considered as
                     medium-grade obligations (i.e., they are neither highly
                     protected nor poorly secured). Interest payments and
                     principal security appear adequate for the present but
                     certain protective elements may be lacking or may be
                     characteristically unreliable over any great length of
                     time. Such bonds lack outstanding investment
                     characteristics and in fact have speculative
                     characteristics as well.

                     Ba: Bonds which are rated Ba are judged to have speculative
                     elements; their future cannot be considered as
                     well-assured. Often the protection of interest and
                     principal payments may be very moderate and thereby not
                     well safeguarded during both good and bad times over the
                     future. Uncertainty of position characterizes bonds in this
                     class.

                     B: Bonds which are rated B generally lack characteristics
                     of a desirable investment. Assurance of interest and
                     principal payments or of maintenance of other terms of the
                     contract over any long period of time may be small.

                     Caa: Bonds which are rated Caa are of poor standing. Such
                     issues may be in default or there may be present elements
                     of danger with respect to principal or interest.

                     Ca: Bonds which are rated Ca represent obligations which
                     are speculative in a high degree. Such issues are often in
                     default or have other marked shortcomings.

                     C: Bonds which are rated C are the lowest rated class of
                     bonds and issues so rated can be regarded as having
                     extremely poor prospects of ever attaining any real
                     investment standing.


                                      -20-
<PAGE>

                     Moody's applies numerical modifiers, 1, 2 and 3 in each
                     generic rating classified from Aa through B in its
                     corporate bond rating system. The modifier 1 indicates that
                     the security ranks in the higher end of its generic rating
                     category; the modifier 2 indicated a mid-range raking; and
                     the modifier 3 indicates that the issue ranks in the lower
                     end of its generic rating category.

Corporate Short-     Moody's short-term debt ratings are opinions of the ability
Term Debt Ratings    of issuers to repay punctually senior debt obligations
                     which have an original maturity not exceeding one year.
                     Obligations relying upon support mechanisms such as letters
                     of credit and bonds of indemnity are excluded unless
                     explicitly rated.

                     Moody's employs the following three designations, all
                     judged to be investment grade, to indicate the relative
                     repayment ability of rated issuers:

                     PRIME-1: Issuers rated Prime-1 (or supporting institutions)
                     have a superior ability for repayment of senior short-term
                     debt obligations. Prime-1 repayment ability will often be
                     evidenced by many of the following characteristics: leading
                     market positions in well-established industries, high rates
                     of return on funds employed; conservative capitalization
                     structure with moderate reliance on debt and ample asset
                     protection; broad margins in earnings coverage of fixed
                     financial charges and high internal cash generation; and
                     well-established access to a range of financial markets and
                     assured sources of alternate liquidity.

                     PRIME-2: Issuers rated Prime-2 (or supporting institutions)
                     have a strong ability for repayment of senior short-term
                     debt obligations. This will normally be evidenced by many
                     of the characteristics cited above but to a lesser degree.
                     Earnings trends and coverage ratios, while sound, may be
                     more subject to variation. Capitalization characteristics,
                     while still appropriate, may be more affected by external
                     conditions. Ample alternate liquidity is maintained.

                     PRIME-3: Issuers rated Prime-3 (or supporting institutions)
                     have an acceptable ability for repayment of senior
                     short-term obligations. The effect of industry
                     characteristics and market compositions may be more
                     pronounced. Variability in earnings and profitability may
                     result in changes in the level of debt protection
                     measurements and may require relatively high financial
                     leverage. Adequate alternate liquidity is maintained.

                     NOT PRIME: Issuers rated Not Prime do not fall within any
                     of the Prime rating categories.

Standard & Poor's    Corporate Municipal Bond Ratings
Ratings Services     Investment Grade

                     AAA: Debt rated AAA has the highest rating assigned by S&P.
                     Capacity to pay interest and repay principal is extremely
                     strong.

                     AA: Debt rated AA has a very strong capacity to pay
                     interest and repay principal and differs from the highest
                     rated issues only in small degree.

                     A: Debt rated A has a strong capacity to pay interest and
                     repay principal although it is somewhat more susceptible to
                     the adverse effects of changes in circumstances and
                     economic conditions that debt in higher rated categories.

                     BBB: Debt rated BBB is regarded as having an adequate
                     capacity to pay interest and repay principal. Whereas it
                     normally exhibits adequate protection parameters, adverse
                     economic conditions, or changing circumstances are more
                     likely to lead to a weakened capacity to pay interest and
                     repay principal for debt in this category than in
                     higher-rated categories.

                     Speculative Grade

                     Debt rated BB, B, CCC, CC, and C is regarded as having
                     predominantly speculative characteristics with respect to
                     capacity to pay interest and repay principal. BB indicates
                     the least degree of speculation and C the highest. While
                     such debt will likely have some quality and protective
                     characteristics, these are outweighed by large
                     uncertainties or major exposures to adverse conditions.


                                      -21-
<PAGE>

                     BB: Debt rated BB has less near-term vulnerability to
                     default than other speculative issues. However, it faces
                     major ongoing uncertainties or exposure to adverse
                     business, financial, or economic conditions which could
                     lead to inadequate capacity to meet timely interest and
                     principal payments. The BB rating category is also used for
                     debt subordinated to senior debt that is assigned an actual
                     or implied BBB-rating.

                     B: Debt rated B has a greater vulnerability to default but
                     currently has the capacity to meet interest payments and
                     principal repayments. Adverse business, financial, or
                     economic conditions will likely impair capacity or
                     willingness to pay interest and repay principal. The B
                     rating category is also used for debt subordinated to
                     senior debt that is assigned an actual or implied BB or
                     BB-rating.

                     CCC: Debt rated CCC has a currently identifiable
                     vulnerability to default and is dependent upon favorable
                     business, financial, and economic conditions to meet timely
                     payment of interest and repayment of principal. In the
                     event of adverse business, financial or economic
                     conditions, it is not likely to have the capacity to pay
                     interest and repay principal. The CCC rating category is
                     also used for debt subordinated to senior debt that is
                     assigned an actual or implied B or B-rating.

                     CC: The rating CC is typically applied to debt subordinated
                     to senior debt that is assigned an actual or implied CCC
                     rating.

                     C: The rating C is typically applied to debt subordinated
                     to senior debt that is assigned an actual or implied
                     CCC-debt rating. The C rating may be used to cover a
                     situation where a bankruptcy petition has been filed, but
                     debt service payments are continued.

                     CI: The rating CI is reserved for income bonds on which no
                     interest is being paid.

                     D: Debt rated D is in payment default. The D rating
                     category is used when interest payments or principal
                     payments are not made on the date due even if the
                     applicable grace period has not expired, unless S&P
                     believes that such payments will be made during such grace
                     period. The D rating will also be used upon the filing of a
                     bankruptcy petition if debt service payments are
                     jeopardized.

                     Plus (+) or Minus (-): The ratings from AA to CCC may be
                     modified by the addition of a plus or minus sign to show
                     relative standing within the major rating categories.

                     Provisional ratings: The letter "p" indicates that the
                     rating is provisional. A provisional rating assumes the
                     successful completion of the project being financed by the
                     debt being rated and indicates that payment of debt service
                     requirements is largely or entirely dependent upon the
                     successful and timely completion of the project. This
                     rating, however, while addressing credit quality subsequent
                     to completion of the project, makes no comment on the
                     likelihood of, or the risk of default upon failure of, such
                     completion. The investor should exercise his own judgment
                     with respect to such likelihood and risk.

                     r: The "r" is attached to highlight derivative, hybrid, and
                     certain other obligations that S&P believes may experience
                     high volatility or high variability in expected returns due
                     to non-credit risks. Examples of such obligations are:
                     securities whose principal or interest return is indexed to
                     equities, commodities, or currencies; certain swaps and
                     options; and interest-only and principal-only mortgage
                     securities.

                     The absence of an "r" symbol should not be taken as an
                     indication that an obligation will exhibit no volatility or
                     variability in total return.

                     N.R.: Not rated.

                     Debt obligations of issuers outside the United States and
                     its territories are rated on the same basis as domestic
                     corporate and municipal issues. The ratings measure the
                     creditworthiness of the obligor but do not take into
                     account currency exchange and related uncertainties.

Commercial Paper     An S&P commercial paper rating is a current assessment of
Rating Definitions   the likelihood of timely payment of debt having an original
                     maturity of no more than 365 days. Ratings are graded into
                     several categories, ranging from A for the highest quality
                     obligations to D for the lowest. These categories are as
                     follows:

                     A-1: This highest category indicates that the degree of
                     safety regarding timely payment is strong. Those



                                      -22-
<PAGE>

                     issues determined to possess extremely strong safety
                     characteristics are denoted with a plus sign (+)
                     designation.

                     A-2: Capacity for timely payment on issues with this
                     designation is satisfactory. However, the relative degree
                     of safety is not as high as for issues designated A-1.

                     A-3: Issues carrying this designation have adequate
                     capacity for timely payment. They are, however, more
                     vulnerable to the adverse effects of changes in
                     circumstances than obligations carrying the higher
                     designations.

                     B: Issues rated B are regarded as having only speculative
                     capacity for timely payment.

                     C: This rating is assigned to a short-term debt obligations
                     with a doubtful capacity for payment.

                     D: Debt rated D is in payment default. The D rating
                     category is used when interest payments or principal
                     payments are not made on the date due, even if the
                     applicable grace period has not expired, unless S&P
                     believes that such payments will be made during such grace
                     period.

                     A commercial paper rating is not a recommendation to
                     purchase, sell or hold a security inasmuch as it does not
                     comment as to market price or suitability for a particular
                     investor. The ratings are based on current information
                     furnished to S&P by the issuer or obtained from other
                     sources it considers reliable. S&P does not perform an
                     audit in connection with any rating and may, on occasion,
                     rely on unaudited financial information. The ratings may be
                     changed, suspended, or withdrawn as a result of changes in
                     or unavailability of such information.


                                      -23-
<PAGE>

FISH: Series C and   INVESTMENT ADVISER
FISH: Series M       PIMCO Advisors L.P., 800 Newport Center Drive, Newport
                     Beach, CA 92660

                     INVESTMENT SUB-ADVISER
                     Pacific Investment Management Company, 840 Newport Center
                     Drive, Suite 300, Newport Beach, CA 92660

                     ADMINISTRATOR/TRADING DESK
                     PIMCO Advisory Services, 1345 Avenue of the Americas, New
                     York, NY 10105

                     CUSTODIAN
                     State Street Bank and Trust Company, 225 Franklin Street,
                     Boston, MA 02110


                     TRANSFER AGENT
                     State Street Bank and Trust Company, 225 Franklin Street,
                     Boston, MA 02110


                     INDEPENDENT ACCOUNTANTS
                     PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO
                     64105

                     LEGAL COUNSEL
                     Ropes & Gray, One International Place, Boston, MA 02110

                     TRUSTEES & OFFICERS
                     Stephen J. Treadway          Chairman, Trustee
                     Paul Belica                  Trustee
                     Robert E. Connor             Trustee
                     Newton B. Schott, Jr.        Secretary
                     Elliot M. Weiss              Assistant Secretary
                     Brian Shlissel               Treasurer
                     Susan A. Murphy              President, Chief Executive
                                                  Officer
                     Angie Clark                  Executive Vice President
                     Robert B. Beel               Senior Vice President
                     Jonathan C. Hart             Senior Vice President
                     Sharon Highland              Senior Vice President
                     George Peterson              Senior Vice President
                     Joni H. Rheingold            Senior Vice President
                     Richard P. Triolo            Senior Vice President
                     Christopher Casenhiser       Vice President
                     Thomas S. Gatto              Vice President
                     Raymond Harvier              Vice President
                     Jessica McInnis Hill         Vice President
                     Leslie Kravetzky             Vice President
                     Scott Rymsa                  Vice President

The Portfolios' Statement of Additional Information ("SAI") includes additional
information about the Portfolios. The SAI is incorporated by reference into this
Prospectus, which means it is part of this Prospectus for legal purposes.

You may get free copies of the SAI, request other information about a Portfolio,
or make inquiries by calling PIMCO Advisory Services at 1-212-739-3535.

You may review and copy information about the Portfolios, including their SAI,
at the Securities and Exchange Commission's Public Reference Room in Washington,
D.C. You may call the Commission at 1-202-942-8090 for information about the
operation of the Public Reference Room. You may also access reports and other
information about the Portfolios on the EDGAR Database on the Commission's
Internet site at http://www.sec.gov. You may get copies of this information,
with payment of a duplication fee, by electronic request at the following E-mail
address: [email protected], or by writing the Public Reference Section of the
Commission, Washington, D.C. 20549-6009. You may need to refer to the
Portfolios' file number under the Investment Company Act, which is 811-9721.

                                      -24-



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