PIMCO FUNDS
497, 2000-04-11
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<PAGE>

<TABLE>
<CAPTION>
                   PIMCO Funds Prospectus

<S>                <C>
                   --------------------------------------------------------------------------------
Pacific            SHORT DURATION BOND FUNDS
Investment         Money Market Fund                          Low Duration Fund II
Management         Short-Term Fund                            Low Duration Fund III
Series             Low Duration Fund                          Low Duration Mortgage Fund
                   --------------------------------------------------------------------------------
March 31, 2000     INTERMEDIATE DURATION BOND FUNDS
                   Moderate Duration Fund                     Total Return Fund III
Share Classes      Real Return Bond Fund                      Total Return Mortgage Fund
                   Total Return Fund                          Investment Grade Corporate Bond Fund
Ins Institutional  Total Return Fund II                       High Yield Fund
                   --------------------------------------------------------------------------------
Adm Administrative LONG DURATION BOND FUNDS
                   Long-Term U.S. Government Fund             Long Duration Fund
                   --------------------------------------------------------------------------------
                   TAX EXEMPT BOND FUNDS
                   Short Duration Municipal                   California Intermediate
                    Income Fund                                Municipal Bond Fund
                   Municipal Bond Fund                        New York Intermediate
                                                               Municipal Bond Fund
                   --------------------------------------------------------------------------------
                   INTERNATIONAL BOND FUNDS
                   Global Bond Fund                           Foreign Bond Fund
                   Global Bond Fund II                        Emerging Markets Bond Fund
                   --------------------------------------------------------------------------------
                   STOCK AND BOND FUNDS
                   Strategic Balanced Fund                    Convertible Fund
                   --------------------------------------------------------------------------------
                   STOCK FUNDS
                   StocksPLUS Fund

                                                                                          P I M C 0
                   This cover is not part of the Prospectus                               ---------
                                                                                              FUNDS
</TABLE>
<PAGE>

            PIMCO Funds Prospectus

PIMCO       This Prospectus describes 27 mutual funds offered by PIMCO Funds:
Funds:      Pacific Investment Management Series. The Funds provide access to
Pacific     the professional investment advisory services offered by Pacific
Investment  Investment Management Company ("PIMCO"). As of December 31, 1999,
Management  PIMCO managed approximately $186 billion in assets. The firm's
Series      institutional heritage is reflected in the PIMCO Funds offered in
            this Prospectus.
March 31,
2000
            This Prospectus explains what you should know about the Funds
Share       before you invest. Please read it carefully.
Classes
Institu-    The Securities and Exchange Commission has not approved or
tional      disapproved these securities, or determined if this Prospectus is
and         truthful or complete. Any representation to the contrary is a
Adminis-    criminal offense.
trative








  PIMCO Funds: Pacific Investment Management Series
1
<PAGE>

            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summaries
           Money Market Fund..............................................   5
           Short-Term Fund................................................   7
           Low Duration Fund..............................................   9
           Low Duration Fund II...........................................  11
           Low Duration Fund III..........................................  13
           Low Duration Mortgage Fund.....................................  15
           Moderate Duration Fund.........................................  17
           Real Return Bond Fund..........................................  19
           Total Return Fund..............................................  21
           Total Return Fund II...........................................  23
           Total Return Fund III..........................................  25
           Total Return Mortgage Fund.....................................  27
           Investment Grade Corporate Bond Fund...........................  29
           High Yield Fund................................................  31
           Long-Term U.S. Government Fund.................................  33
           Long Duration Fund.............................................  35
           Short Duration Municipal Income Fund...........................  37
           Municipal Bond Fund............................................  39
           California Intermediate Municipal Bond Fund....................  41
           New York Intermediate Municipal Bond Fund......................  43
           Global Bond Fund...............................................  45
           Global Bond Fund II............................................  47
           Foreign Bond Fund..............................................  49
           Emerging Markets Bond Fund.....................................  51
           Strategic Balanced Fund........................................  53
           Convertible Fund...............................................  55
           StocksPLUS Fund................................................  57
         Summary of Principal Risks.......................................  59
         Management of the Funds..........................................  62
         Investment Options...............................................  65
         Purchases, Redemptions and Exchanges.............................  66
         How Fund Shares are Priced.......................................  70
         Fund Distributions...............................................  71
         Tax Consequences.................................................  72
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  73
         Financial Highlights.............................................  83
         Appendix A--Description of Securities Ratings.................... A-1
</TABLE>
                                                                   Prospectus
                                                                               2
<PAGE>

            Summary Information

The table below compares certain investment characteristics of the Funds. Other
important characteristics are described in the individual Fund Summaries
beginning on page 5. Following the table are certain key concepts which are
used throughout the prospectus.

<TABLE>
<CAPTION>

                                                                                                                 Non-U.S.
                                                                                                                 Dollar
                                                                                                                 Denominated
                                       Main Investments   Duration                         Credit Quality(1)     Securities(2)
- ------------------------------------------------------------------------------------------------------------------------------------
 <C>           <C>                     <S>                <C>                              <C>                   <C>
 Short         Money Market            Money market       (less than or =)                 Min 95% Aaa or        0%
 Duration                              instruments        90 days dollar-                  Prime 1;
 Bond Funds                                               weighted average                 (less than or =)
                                                          maturity                         5% Aa or Prime 2
               ---------------------------------------------------------------------------------------------------------------------
               Short-Term              Money market       0-1 year                         B to Aaa; max 10%     0-5%(3)
                                       instruments and                                     below Baa
                                       short maturity
                                       fixed income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Low Duration            Short maturity     1-3 years                        B to Aaa; max 10%     0-20%(3)
                                       fixed income                                        below Baa
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Low Duration II         Short maturity     1-3 years                        A to Aaa              0%
                                       fixed income
                                       securities with
                                       quality and non-
                                       U.S. issuer
                                       restrictions
               ---------------------------------------------------------------------------------------------------------------------
               Low Duration III        Short maturity     1-3 years                        B to Aaa; max 10%     0-20%(3)
                                       fixed income                                        below Baa
                                       securities with
                                       prohibitions on
                                       firms engaged in
                                       socially
                                       sensitive
                                       practices
               ---------------------------------------------------------------------------------------------------------------------
               Low Duration Mortgage   Short and          1-3 years                        Baa to Aaa; max 10%   0%
                                       intermediate                                        below Aaa
                                       maturity
                                       mortgage-related
                                       fixed income
                                       securities
- ------------------------------------------------------------------------------------------------------------------------------------
 Intermediate  Moderate Duration       Short and          2-5 years                        B to Aaa; max 10%     0-20%(3)
 Duration Bond                         intermediate                                        below Baa
 Funds                                 maturity fixed
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Real Return Bond        Inflation-         N/A                              B to Aaa; max 10%     0-20%(3)
                                       indexed fixed                                       below Baa
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Total Return            Intermediate       3-6 years                        B to Aaa; max 10%     0-20%(3)
                                       maturity fixed                                      below Baa
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Total Return II         Intermediate       3-6 years                        Baa to Aaa            0%
                                       maturity fixed
                                       income
                                       securities with
                                       quality and
                                       non-U.S. issuer
                                       restrictions
               ---------------------------------------------------------------------------------------------------------------------
               Total Return III        Intermediate       3-6 years                        B to Aaa; max 10%     0-20%(3)
                                       maturity fixed                                      below Baa
                                       income
                                       securities with
                                       prohibitions on
                                       firms engaged in
                                       socially
                                       sensitive
                                       practices
               ---------------------------------------------------------------------------------------------------------------------
               Total Return Mortgage   Intermediate       2-6 years                        Baa to Aaa; max 10%   0%
                                       maturity                                            below Aaa
                                       mortgage-related
                                       fixed income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Investment Grade        Corporate fixed    3-7 years                        B to Aaa; max 10%     0-20%(3)
               Corporate Bond          income                                              below Baa
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               High Yield              Higher yielding    2-6 years                        B to Aaa; min 65%     0-15%(4)
                                       fixed income                                        below Baa
                                       securities
- ------------------------------------------------------------------------------------------------------------------------------------
 Long Duration Long-Term               Long-term          (greater than or =) 8 years      A to Aaa              0%
 Bond Funds    U.S. Government         maturity fixed
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Long Duration           Long-term          (greater than or =) 8 years      B to Aaa; max 10%     0-20%(3)
                                       maturity fixed                                      below Baa
                                       income
                                       securities
- ------------------------------------------------------------------------------------------------------------------------------------
 Tax Exempt    Short Duration          Short and          0-2 years                        Baa to Aaa            0%
 Bond Funds    Municipal Income        intermediate
                                       maturity
                                       municipal
                                       securities
                                       (exempt from
                                       federal income
                                       tax)
               ---------------------------------------------------------------------------------------------------------------------
               Municipal Bond          Intermediate and   3-10 years                       Ba to Aaa; max        0%
                                       long-term                                           10% below Baa
                                       maturity
                                       municipal
                                       securities
                                       (exempt from
                                       federal income
                                       tax)
               ---------------------------------------------------------------------------------------------------------------------
               California Intermediate Intermediate       3-7 years                        B to Aaa; max 10%     0%
               Municipal Bond          maturity                                            below Baa
                                       municipal
                                       securities
                                       (exempt from
                                       federal and
                                       California
                                       income tax)
               ---------------------------------------------------------------------------------------------------------------------
               New York Intermediate   Intermediate       3-7 years                        B to Aaa; max 10%     0%
               Municipal Bond          maturity                                            below Baa
                                       municipal
                                       securities
                                       (exempt from
                                       federal and New
                                       York income tax)
- ------------------------------------------------------------------------------------------------------------------------------------
 International Global Bond             U.S. and non-      3-7 years                        B to Aaa; max         25-75%(5)
 Bond Funds                            U.S.                                                10% below Baa
                                       intermediate
                                       maturity fixed
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Global Bond II          U.S. and hedged    3-7 years                        B to Aaa; max         25-75%(5)
                                       non-U.S.                                            10% below Baa
                                       intermediate
                                       maturity fixed
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Foreign Bond            Intermediate       3-7 years                        B to Aaa; max         (greater than
                                       maturity hedged                                     10% below Baa         or =) 85%(5)
                                       non-U.S. fixed
                                       income
                                       securities
               ---------------------------------------------------------------------------------------------------------------------
               Emerging Markets Bond   Emerging market    0-8 years                        B to Aaa              (greater than
                                       fixed income                                                              or =) 80%(5)
                                       securities
- ------------------------------------------------------------------------------------------------------------------------------------
 Stock and     Strategic Balanced      Intermediate       0-6 years                        B to Aaa; max         0-20%(3)
 Bond                                  maturity fixed-                                     10% below Baa
 Funds                                 income
                                       securities and
                                       S&P 500 stock
                                       index
                                       derivatives
               ---------------------------------------------------------------------------------------------------------------------
               Convertible             Convertible        N/A                              Caa to Aaa; max       0-20%(3)
                                       securities                                          40% below Baa and
                                                                                           10% below B
- ------------------------------------------------------------------------------------------------------------------------------------
 Stock Funds   StocksPLUS              S&P 500 stock      0-1 year                         B to Aaa; max         0-20%(3)
                                       index                                               10% below Baa
                                       derivatives
                                       backed by a
                                       portfolio of
                                       short-term
                                       fixed-income
                                       securities

</TABLE>

(1) As rated by Moody's Investors Service, Inc., or equivalently rated by
    Standard & Poor's Rating Service, or if unrated, determined by PIMCO to be
    of comparable quality.
(2) Each Fund (except the Low Duration II, Total Return II, Long-Term U.S.
    Government, Short-Duration Municipal Income, Municipal Bond, California
    Intermediate Municipal Bond and New York Intermediate Municipal Bond Funds)
    may invest beyond these limits in U.S. dollar-denominated securities of non-
    U.S. issuers.
(3) The percentage limitation relates to non-U.S. dollar-denominated securities.
(4) The percentage limitation relates to euro-denominated securities.
(5) The percentage limitation relates to securities of foreign issuers
    denominated in any currency.

3   PIMCO Funds: Pacific Investment Management Series

<PAGE>

            Summary Information (continued)

            The "Fixed Income Funds" are the Money Market, Short-Term, Low
Fixed       Duration, Low Duration II, Low Duration III, Low Duration
Income      Mortgage, Moderate Duration, Real Return Bond, Total Return, Total
Instruments Return II, Total Return III, Total Return Mortgage, Investment
            Grade Corporate Bond, High Yield, Long-Term U.S. Government, Long
            Duration, Short Duration Municipal Income, Municipal Bond,
            California Intermediate Municipal Bond, New York Intermediate
            Municipal Bond, Global Bond, Global Bond II, Foreign Bond, and
            Emerging Markets Bond Funds. Each Fixed Income Fund differs from
            the others primarily in the length of the Fund's duration or the
            proportion of its investments in certain types of fixed income
            securities. Each Fixed Income Fund invests at least 65% of its
            assets in "Fixed Income Instruments," which as used in this
            Prospectus includes:

            .  securities issued or guaranteed by the U.S. Government, its
               agencies or government-sponsored enterprises ("U.S. Government
               Securities");
            .  corporate debt securities of U.S. and non-U.S. issuers,
               including convertible securities and corporate commercial
               paper;
            .  mortgage-backed and other asset-backed securities;
            .  inflation-indexed bonds issued both by governments and
               corporations;
            .  structured notes, including hybrid or "indexed" securities,
               event-linked bonds and loan participations;
            .  delayed funding loans and revolving credit facilities;
            .  bank certificates of deposit, fixed time deposits and bankers'
               acceptances;
            .  repurchase agreements and reverse repurchase agreements;
            .  debt securities issued by states or local governments and their
               agencies, authorities and other instrumentalities;
            .  obligations of non-U.S. governments or their subdivisions,
               agencies and instrumentalities; and
            .  obligations of international agencies or supranational
               entities.

Duration    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 Fund with a longer average portfolio duration
            will be more sensitive to changes in interest rates than a Fund
            with a shorter average portfolio duration.

Credit      In this Prospectus, references are made to credit ratings of debt
Ratings     securities which measure an issuer's expected ability to pay
            principal and interest on time. Credit ratings are determined by
            rating organizations, such as Standard & Poor's Rating Service
            ("S&P") or Moody's Investors Service, Inc. ("Moody's"). The
            following terms are generally used to describe the credit quality
            of debt securities depending on the security's credit rating or,
            if unrated, credit quality as determined by PIMCO:

            . high quality
            . investment grade
            . below investment grade ("high yield securities" or "junk bonds")

            For a further description of credit ratings, see "Appendix A--
            Description of Securities Ratings."

Fund        The Funds provide a broad range of investment choices. The
Descrip-    following summaries identify each Fund's investment objective,
tions,      principal investments and strategies, principal risks, performance
Performance information and fees and expenses. A more detailed "Summary of
and Fees    Principal Risks" describing principal risks of investing in the
            Funds begins after the Fund Summaries.

             It is possible to lose money on investments in the Funds.

             An investment in a Fund is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.
                                                                   Prospectus
                                                                               4
<PAGE>

            PIMCO Money Market Fund                      Ticker Symbols:
                                                         PMIXX (Inst Class).
                                                         PMAXX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Money market         Minimum 95% rated
and           current income,        instruments          Aaa or Prime 1;
Strategies    consistent with                             (less than or =) 5%
              preservation of        Average Portfolio    Aa or Prime 2
              capital and daily      Maturity
              liquidity                                   Dividend Frequency
                                     (less than or        Declared daily and
                                     =) 90 days           distributed monthly
                                     dollar-weighted
                                     average
                                     maturity


            The Fund seeks to achieve its investment objective by investing at
            least 95% of its total assets in a diversified portfolio of money
            market securities that are in the highest rating category for
            short-term obligations. The Fund also may invest up to 5% of its
            total assets in money market securities that are in the second-
            highest rating category for short-term obligations. The Fund may
            only invest in U.S. dollar-denominated securities that mature in
            397 days or fewer from the date of purchase. The dollar-weighted
            average portfolio maturity of the Fund may not exceed 90 days. The
            Fund attempts to maintain a stable net asset value of $1.00 per
            share, although there is no assurance that it will be successful
            in doing so.


             The Fund may invest in the following: obligations of the U.S.
            Government (including its agencies and instrumentalities); short-
            term corporate debt securities of domestic and foreign
            corporations; obligations of domestic and foreign commercial
            banks, savings banks, and savings and loan associations; and
            commercial paper. The Fund may invest more than 25% of its total
            assets in securities or obligations issued by U.S. banks. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions in order to earn income.

             The Fund's investments will comply with applicable rules
            governing the quality, maturity and diversification of securities
            held by money market funds.

- --------------------------------------------------------------------------------
Principal   An investment in the Fund is not insured or guaranteed by the
Risks       Federal Deposit Insurance Corporation or any other government
            agency. Although the Fund seeks to preserve the value of your
            investment at $1.00 per share, it is possible to lose money by
            investing in the Fund. Among the principal risks of investing in
            the Fund, which could adversely affect its net asset value, yield
            and total return, are:

              .Interest Rate Risk    .Market Risk
              .Credit Risk           .Issuer Risk
              .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (1/25/95), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. To obtain the Fund's
            current yield, call 1-800-927-4648. Past performance is no
            guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
5
<PAGE>

            PIMCO Money Market Fund (continued)

            Calendar Year Total Returns -- Institutional Class


  92     93     94     95     96     97     98     99       Highest and Lowest
 ----   ----   ----   ----   ----   ----   ----   ----      Quarter Returns
 3.44%  2.80%  3.92%  6.06%  5.28%  5.34%  5.34%  4.90%     (for periods shown
                                                            in the bar chart)
Calendar Year End (through 12/31)                           --------------------
                                                            Highest (4th Qtr.
                                                            '95)           1.72%
                                                            --------------------
                                                            Lowest (2nd Qtr.
                                                            '93)           0.67%


            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                                Fund Inception
                                                 1 Year 5 Years (3/1/91)(3)
         <S>                                     <C>    <C>     <C>
         -----------------------------------------------------------------------
         Institutional Class                     4.90%  5.38%   4.73%
         -----------------------------------------------------------------------
         Administrative Class                    4.63%  5.14%   4.48%
         -----------------------------------------------------------------------
         Salomon 3-Month Treasury Bill Index(1)  4.73%  5.20%   4.70%
         -----------------------------------------------------------------------
         Lipper Institutional Money Market Fund
          Average(2)                             4.92%  5.32%   4.77%
         -----------------------------------------------------------------------
</TABLE>

            (1)  The Salomon 3-Month Treasury Bill Index is an unmanaged index
                 representing monthly return equivalents of yield averages of
                 the last 3 month Treasury Bill issues. It is not possible to
                 invest directly in the index.
            (2)  The Lipper Institutional Money Market Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest in high quality
                 financial instruments (rated in the top two grades) with
                 dollar-weighted maturities of less than 90 days. It does not
                 take into account sales charges.
            (3)  The Fund commenced operations on 3/1/91. Index comparisons
                 begin at 2/28/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.15%    None           0.20%       0.35%
         -----------------------------------------------------------------------
         Administrative  0.15     0.25%          0.20        0.60
         -----------------------------------------------------------------------

</TABLE>

            (1) Other Expenses reflects a 0.20% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

         Share Class     Year 1   Year 3         Year 5      Year 10
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $36      $113           $197        $443
         -----------------------------------------------------------------------
         Administrative   61       192            335         750
         -----------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               6
<PAGE>

            PIMCO Short-Term Fund                       Ticker Symbols:
                                                        PTSHX (Inst. Class)
                                                        PSFAX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Money market         B to Aaa; maximum
and           current income,        instruments and      10% below Baa
Strategies    consistent with        short maturity
              preservation of        fixed income         Dividend Frequency
              capital and daily      securities           Declared daily and
              liquidity                                   distributed monthly
                                     Average Portfolio
                                     Duration 0-1 year

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund will vary
            based on PIMCO's forecast for interest rates and will normally not
            exceed one year. For point of reference, the dollar-weighted
            average portfolio maturity of this Fund is normally not expected
            to exceed three years.


             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 5% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Issuer Risk           .Leveraging Risk
              .Credit Risk           .Derivatives Risk      .Management Risk
              .Market Risk           .Mortgage Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (2/1/96), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
7
<PAGE>

            PIMCO Short-Term Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                        [GRAPH]                             Highest and Lowest
                                                            Quarter Returns
 90    91    92    93    94    95    96    97    98    99   (for periods shown
- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- in the bar chart)
8.47% 6.65% 3.63% 4.62% 2.90% 9.21% 7.00% 6.51% 5.74% 5.24% --------------------
                                                            Highest (4th Qtr.
             Calendar Year End (through 12/31)              '95)           2.60%
                                                            --------------------
                                                            Lowest (1st Qtr.
                                                            '94)           0.19%




            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>

                                                    1 Year   5 Years   10 Years
         -----------------------------------------------------------------------
         <S>                                        <C>      <C>       <C>
         Institutional Class                        5.24%    6.73%     5.98%
         -----------------------------------------------------------------------
         Administrative Class                       4.97%    6.47%     5.72%
         -----------------------------------------------------------------------
         Salomon 3-Month Treasury Bill(1)           4.73%    5.20%     5.05%
         -----------------------------------------------------------------------
         Lipper Ultrashort Obligation Fund Avg(2)   4.58%    5.62%     5.59%
         -----------------------------------------------------------------------
</TABLE>

            (1)  The Salomon 3-Month Treasury Bill Index is an unmanaged index
                 representing monthly return equivalents of yield averages of
                 the last 3 month Treasury Bill issues. It is not possible to
                 invest directly in the index.
            (2)  The Lipper Ultrashort Obligation Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in investment-grade debt issues or better, and
                 maintain a portfolio dollar-weighted average maturity between
                 91 and 365 days. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.25%    None           0.20%       0.45%
         -----------------------------------------------------------------------
         Administrative  0.25     0.25%          0.20        0.70
         -----------------------------------------------------------------------

</TABLE>

            (1) Other Expenses reflects a 0.20% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

         Share Class     Year 1   Year 3         Year 5      Year 10
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $46      $144           $252        $567
         -----------------------------------------------------------------------
         Administrative   72       224            390         871
         -----------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               8
<PAGE>

            PIMCO Low Duration Fund                         Ticker Symbols:
                                                            PTLDX (Inst. Class)
                                                            PLDAX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short maturity       B to Aaa; maximum
and           total return,          fixed income         10% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             1-3 years
              management

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a one- to three-year time frame based on PIMCO's
            forecast for interest rates.


             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (1/3/95), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
9
<PAGE>

            PIMCO Low Duration Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                                            Highest and Lowest
                                                            Quarter Returns
                                                            (for periods shown
                                                            in the bar chart)
                                                            --------------------
                 [GRAPH]                                    Highest (3rd Qtr.
                                                            '91)           3.90%
                                                            --------------------
                                                            Lowest (1st Qtr.
                                                            '94)          -0.32%

                  Calendar Year End (through 12/31)
  90     91     92     93     94     95     96     97     98     99
 ----   ----   ----   ----   ----   ----   ----   ----   ----   ----
9.05%  13.46%  7.69%  7.76%  0.63% 11.93%  6.14%  8.24%  7.16%  2.97%

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                             <C>    <C>     <C>
                                                         1 Year 5 Years 10 Years
            --------------------------------------------------------------------
         Institutional Class                             2.97%  7.25%   7.44%
            --------------------------------------------------------------------
         Administrative Class                            2.72%  6.98%   7.18%
            --------------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(1)        3.06%  6.51%   6.59%
            --------------------------------------------------------------------
         Lipper Short Investment Grade Debt Fund Avg(2)  2.81%  5.95%   6.36%
            --------------------------------------------------------------------
</TABLE>

            (1) The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
                index of U.S Treasury obligations having maturities from one
                to 2.99 years. It is not possible to invest directly in the
                index.
            (2) The Lipper Short Investment Grade Debt Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of less than
                three years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         ------------------------------------------------------------------
         Institutional   0.25%    None           0.18%       0.43%
         ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.18        0.68
         ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.18% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
         ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $44      $138           $241        $542
         ------------------------------------------------------------------
         Administrative   69       218            379         847
         ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              10
<PAGE>

            PIMCO Low Duration Fund II                      Ticker Symbols:

                                                            PLDTX (Inst.Class)

                                                            PDFAX (Admin.Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short maturity       A to Aaa
and           total return,          fixed income
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio
              prudent                Duration             Declared daily and
              investment             1-3 years            distributed monthly
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a one- to three-year time frame based on PIMCO's
            forecast for interest rates. The Fund may invest only in
            investment grade U.S. dollar denominated securities of U.S.
            issuers that are rated A or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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 Fund, which could
            adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Issuer Risk           .Leveraging Risk
              .Credit Risk           .Derivatives Risk      .Liquidity Risk
              .Market Risk           .Mortgage Risk         .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (2/2/98), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
11
<PAGE>

            PIMCO Low Duration Fund II (continued)

            Calendar Year Total Returns -- Institutional Class


                                             Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
                [GRAPH]                      ----------------------------------
                                             Highest (1st Qtr. '95)      3.83%
                                             ----------------------------------
                                             Lowest (1st Qtr. '94)      -0.60%

  92      93     94     95      96     97     98     99
 -----  -----  -----  ------   -----  -----  -----  -----
 6.23%  6.58%  0.32%  11.78%   5.22%  7.62%  6.60%  2.55%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                       <C>    <C>     <C>
                                                                  Fund Inception
                                                   1 Year 5 Years (11/1/91)(3)
            --------------------------------------------------------------------
         Institutional Class                       2.55%  6.71%   6.08%
            --------------------------------------------------------------------
         Administrative Class                      2.29%  6.44%   5.81%
            --------------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(1)  3.06%  6.51%   5.80%
            --------------------------------------------------------------------
         Lipper Short Investment Grade Debt
          Fund Avg(2)                              2.81%  5.95%   5.59%
            --------------------------------------------------------------------
</TABLE>

            (1)  The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
                 index of U.S Treasury obligations having maturities from one
                 to 2.99 years. It is not possible to invest directly in the
                 index.
            (2)  The Lipper Short Investment Grade Debt Fund Average is a
                 total return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in investment-grade debt issues (rated in the top four
                 grades) with dollar-weighted average maturities of less than
                 three years. It does not take into account sales charges.
            (3)  The Fund began operations on 11/1/91. Index comparisons began
                 on 10/31/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
         ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
         ------------------------------------------------------------------
         Administrative   77       240            417         930
         ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 12
<PAGE>

            PIMCO Low Duration Fund III                    Ticker Symbols:
                                                           PLDIX  (Inst. Class)
                                                           N/A  (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short maturity       B to Aaa; maximum
and           total return,          fixed income         10% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             1-3 years
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a one- to three-year time frame based on PIMCO's
            forecast for interest rates. The Fund will not invest in the
            securities of any issuer determined by PIMCO to be engaged
            principally in the provision of healthcare services, the
            manufacture of alcoholic beverages, tobacco products,
            pharmaceuticals or military equipment, or the operation of
            gambling casinos. The Fund will also avoid, to the extent possible
            on the basis of information available to PIMCO, the purchase of
            securities of issuers engaged in the production or trade of
            pornographic materials. An issuer will be deemed to be principally
            engaged in an activity if it derives more than 10% of its gross
            revenues from such activities.

             The Fund invests primarily in investment grade securities, but
            may invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund will
            normally hedge at least 75% of its exposure to foreign currency to
            reduce the risk of loss due to fluctuations in exchange rates.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (3/19/99), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
13
<PAGE>

            PIMCO Low Duration Fund III (continued)

            Calendar Year Total Returns -- Institutional Class


                                                            Highest and Lowest
                      [GRAPH]                               Quarter Returns
                                                            (for periods shown
                                                            in the bar chart)
                                                            --------------------
                                                            Highest (3rd Qtr.
                                                            '98)           2.66%
                     97     98     99                       --------------------
                   -----  -----  -----                      Lowest (2nd Qtr.
                   7.12%  6.65%  2.73%                      '99)           0.29%

                 Calendar Year End (through 12/31)


            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                             <C>    <C>
                                                                Fund Inception
                                                         1 Year (12/31/96)
            ------------------------------------------------------------------
         Institutional Class                             2.73%  5.48%
            ------------------------------------------------------------------
         Administrative Class                            2.48%  5.22%
            ------------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(1)        3.06%  5.56%
            ------------------------------------------------------------------
         Lipper Short Investment Grade Debt Fund Avg(2)  2.81%  4.93%
            ------------------------------------------------------------------
</TABLE>

            (1) The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
             index of U.S Treasury obligations having maturities from one to
             2.99 years. It is not possible to invest directly in the index.
            (2) The Lipper Short Investment Grade Debt Fund Average is a total
             return performance average of Funds tracked by Lipper Analytical
             Services, Inc. that invest at least 65% of their assets in
             investment-grade debt issues (rated in the top four grades) with
             dollar-weighted average maturities of less than three years. It
             does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
         ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
         ------------------------------------------------------------------
         Administrative   77       240            417         930
         ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              14
<PAGE>

            PIMCO Low Duration Mortgage Fund                Ticker Symbols:
                                                            N/A (Inst. Class)
                                                            N/A  (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short maturity       Baa to Aaa; maximum
and           total return,          mortgage-related     10% below Aaa
Strategies    consistent with        fixed income
              preservation of        securities
              capital and                                 Dividend Frequency
              prudent                Average Portfolio    Declared daily and
              investment             Duration             distributed monthly
              management             1-3 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in a
            diversified portfolio of mortgage-related Fixed Income Instruments
            of varying maturities (such as mortgage pass-through securities,
            collateralized mortgage obligations, commercial mortgage-backed
            securities and mortgage dollar rolls). The average portfolio
            duration of this Fund normally varies within a one- to three-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            invests primarily in securities that are in the highest rating
            category, but may invest up to 10% of its assets in investment
            grade securities rated below Aaa by Moody's or AAA by S&P, subject
            to a minimum rating of Baa by Moody's or BBB by S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may not invest in securities denominated in foreign currencies,
            but may invest without limit in U.S. dollar-denominated securities
            of foreign issuers.


             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Mortgage Risk         .Foreign Investment
              .Credit Risk           .Derivatives Risk       Risk
              .Market Risk           .Liquidity Risk        .Leveraging Risk
              .Issuer Risk                                  .Management Risk

             Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            The Administrative Class of the Fund had not commenced operations
            as of the date of this prospectus. Past performance is no
            guarantee of future results.


  PIMCO Funds: Pacific Investment Management Series
15
<PAGE>

            PIMCO Low Duration Mortgage Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                                            Highest and Lowest
                                                            Quarter Returns
                                                            (for periods shown
                                                            in the bar chart)
                                                            --------------------
                                                            Highest (3rd Qtr.
                                                            '98)           2.82%
                                                            --------------------
                                                            Lowest (4th Qtr.
                                                            '99)          -0.48%
                       [GRAPH]

                       98     99
                     -----  -----
                     6.10%  2.86%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                          <C>          <C>
                                                                   Fund Inception
                                                      1 Year       (7/31/97)
            ---------------------------------------------------------------------
         Institutional Class                          2.86%        5.53%
            ---------------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(1)     3.06%        5.22%
            ---------------------------------------------------------------------
         Lipper U.S. Mortgage Fund Avg(2)             0.65%        4.12%
            ---------------------------------------------------------------------
</TABLE>

            (1)  The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
                 index of U.S Treasury obligations having maturities from one
                 to 2.99 years. It is not possible to invest directly in the
                 index.
            (2)  The Lipper U.S. Mortgage Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc. that invest at least 65% of their assets in
                 mortgages/securities issued or guaranteed as to principal and
                 interest by the U.S. government and certain federal agencies.
                 It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.26%       0.51%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.26        0.76
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $52      $164           $285        $640
            ------------------------------------------------------------------
         Administrative   78       243            422         942
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              16
<PAGE>

            PIMCO Moderate Duration Fund                     Ticker Symbols:
                                                             PMDRX (Inst. Class)
                                                             N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short and            B to Aaa; maximum
and           total return,          intermediate         10% below Baa
Strategies    consistent with        maturity fixed
              preservation of        income securities    Dividend Frequency
              capital and
              prudent                Average Portfolio    Declared daily and
              investment             Duration 2-5 years   distributed monthly
              management







            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a two- to five-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:



              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            The Administrative Class of the Fund has not commenced operations
            as of the date of this prospectus. Past performance is no
            guarantee of future results.

17 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Moderate Duration Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                                 Highest and Lowest Quarter
                                                 Returns (for periods shown
                        [GRAPH]                  in the bar chart)
                                                 -------------------------------
                      97     98     99           Highest (3rd Qtr. '98)    4.26%
                    -----  -----  -----          -------------------------------
                    7.97%  8.11%  0.89%          Lowest (2nd Qtr.'99)     -0.64%



                 Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                              <C>    <C>
                                                                 Fund Inception
                                                          1 Year (12/31/96)
            -------------------------------------------------------------------
         Institutional Class                              0.89%  5.61%
            -------------------------------------------------------------------
         Lehman Brothers Intermediate
          Government/Corporate Bond Index(1)              0.39%  5.50%
            -------------------------------------------------------------------
         Lipper Short Intermediate Investment Grade Debt
          Fund Avg(2)                                     0.89%  4.75%
            -------------------------------------------------------------------
</TABLE>

         (1) The Lehman Brothers Intermediate Government/Corporate Bond Index is
             an unmanaged index of fixed income securities having maturities
             from 1 to 9.99 years. It is not possible to invest directly in the
             index.
         (2) The Lipper Short Intermediate Investment Grade Debt Fund Average is
             a total return performance average of Funds tracked by Lipper
             Analytical Services, Inc. that invest at least 65% of their assets
             in investment-grade debt issues (rated in the top four grades) with
             dollar-weighted average maturities of one to five years. It does
             not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.20%       0.45%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.20        0.70
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.20% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $46      $144           $252        $567
            ------------------------------------------------------------------
         Administrative   72       224            390         871
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 18
<PAGE>

            PIMCO Real Return Bond Fund                    Ticker Symbols:
                                                           PRRIX  (Inst. Class)
                                                           N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Inflation-indexed    B to Aaa; maximum
and           real return,           fixed income         10% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              real capital and       Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             See description
              management             below


            The Fund seeks its investment objective by investing under normal
            circumstances at least 65% of its assets in inflation-indexed
            bonds of varying maturities issued by the U.S. and non-U.S.
            governments, their agencies or instrumentalities, and
            corporations. Inflation-indexed bonds are fixed income securities
            that are structured to provide protection against inflation. The
            value of the bond's principal or the interest income paid on the
            bond is adjusted to track changes in an official inflation
            measure. The U.S. Treasury uses the Consumer Price Index for Urban
            Consumers as the inflation measure. Inflation-indexed bonds issued
            by a foreign government are generally adjusted to reflect a
            comparable inflation index, calculated by that government. "Real
            return" equals total return less the estimated cost of inflation,
            which is typically measured by the change in an official inflation
            measure.

             Because of the unique features of inflation-indexed bonds, PIMCO
            uses a modified form of duration for the Fund ("real duration")
            which measures price changes as a result of changes in "real"
            interest rates. A "real" interest rate is the market interest rate
            minus expected inflation. There is no limit on the real duration
            of the Fund, but it is expected that the average real duration of
            this Fund will normally vary approximately within the range of the
            average real duration of all inflation-indexed bonds issued by the
            U.S. Treasury in the aggregate, which as of March 7, 2000 was 9.0
            years. For point of reference, it is expected that the average
            portfolio duration (as opposed to real duration) of the Fund will
            generally vary within a one- to five-year time frame, although
            this range is subject to change.

             The Fund invests primarily in investment grade securities, but
            may invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund also may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar denominated securities of foreign issuers. The Fund 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. The Fund is non-diversified, which means that it may
            concentrate its assets in a smaller number of issuers than a
            diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Issuer Non-           .Management Risk
              .Issuer Risk            Diversification Risk
                                     .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            The Administrative Class of the Fund has not commenced operations
            as of the date of this prospectus. Past performance is no
            guarantee of future results.

19
  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Real Return Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class



                                                            Highest and Lowest
                        [GRAPH]                             Quarter Returns

                                                            (for periods shown
                       98     99                            in the bar chart)
                      -----  -----                          --------------------
                      5.21%  5.72%                          Highest (3rd Qtr.
                                                            '98)           3.19%
                                                            --------------------
                                                            Lowest (4th Qtr.
                                                            '98)          -0.05%
                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                          <C>        <C>
                                                                 Fund Inception
                                                      1 Year     (1/29/97)(3)
            -------------------------------------------------------------------
         Institutional Class                          5.72%      5.13%
            -------------------------------------------------------------------
         Lehman Brothers Inflation Linked Treasury
          Index(1)                                    2.36%      2.99%
            -------------------------------------------------------------------
         Lipper Short U.S. Government Fund Avg(2)     2.50%      4.57%
            -------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Inflation Linked Treasury Index is an
             unmanaged index consisting of the U.S. Treasury Inflation
             Protected Securities market with an average duration of 3.2 years
             as of 12/31/99. It is not possible to invest directly in the
             index.
            (2) The Lipper Short U.S. Government Fund Average is a total
             return performance average of Funds tracked by Lipper Analytical
             Services, Inc. that invest at least 65% of their assets in
             securities issued or guaranteed by the U.S. government, its
             agencies, or its instrumentalities, with dollar-weighted average
             maturities of less than three years. It does not take into
             account sales charges.
            (3) The Fund began operations on 1/29/97. Index comparisons began
             on 1/31/97.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.27%       0.52%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.27        0.77
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $53      $167           $291        $653
            ------------------------------------------------------------------
         Administrative   79       246            428         954
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              20
<PAGE>

            PIMCO Total Return Fund                     Ticker Symbols:
                                                        PTTRX (Inst.Class)
                                                        PTRAX  (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         B to Aaa; maximum
and           total return,          maturity fixed       10% below Baa
Strategies    consistent with        income securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             3-6 years
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates.


             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:
              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (9/8/94), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
21
<PAGE>

            PIMCO Total Return Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                             Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
                                             ----------------------------------
                                             Highest (3rd Qtr. '91)       6.66%
                                             ----------------------------------
                       [GRAPH]               Lowest (1st Qtr. '94)       -2.69%

  89      90    91    92      93      94      95     96      97     98      99
- ------  ----- ------ -----  ------  ------  ------  -----  ------  -----  -----
- -
14.24%  8.05% 19.55% 9.73%  12.51%  -3.58%  19.77%  4.69%  10.16%  9.76% -0.28%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                      <C>       <C>       <C>
                                                  1 Year    5 Years   10 Years
            ------------------------------------------------------------------
         Institutional Class                      -0.28%    8.62%     8.80%
            ------------------------------------------------------------------
         Administrative Class                     -0.53%    8.35%     8.54%
            ------------------------------------------------------------------
         Lehman Aggregate Bond Index(1)           -0.82%    7.73%     7.70%
            ------------------------------------------------------------------
         Lipper Intermediate Investment
          Grade Debt Fund Avg(2)                  -1.31%    6.79%     7.09%
            ------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Lipper Intermediate Investment Grade Debt Fund Average is
                a total return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of five to ten
                years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.18%       0.43%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.18        0.68
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.18% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $44      $138           $241        $542
            ------------------------------------------------------------------
         Administrative   69       218            379         847
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 22
<PAGE>

            PIMCO Total Return Fund II                      Ticker Symbols:
                                                            PMBIX (Inst. Class)
                                                            PRADX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         Baa to Aaa
and           total return,          maturity fixed
Strategies    consistent with        income securities    Dividend Frequency
              preservation of                             Declared daily and
              capital and            Average Portfolio    distributed monthly
              prudent                Duration
              investment             3-6 years
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates. The Fund may invest only in
            investment grade U.S. dollar denominated securities of U.S.
            issuers that are rated at least Baa by Moody's or BBB by S&P, or,
            if unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Issuer Risk           .Leveraging Risk
              .Credit Risk           .Derivatives Risk      .Liquidity Risk
              .Market Risk           .Mortgage Risk         .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (11/30/94), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
23
<PAGE>

            PIMCO Total Return Fund II (continued)

            Calendar Year Total Returns -- Institutional Class


                                                            Highest and Lowest
                                                            Quarter Returns
                                                            (for periods shown
                                                            in the bar chart)
                                                            --------------------
                                                            Highest (3rd Qtr.
                                                            '92)           5.57%
                     [GRAPH]                                --------------------
                                                            Lowest (1st Qtr.
                                                            '94)          -2.60%


  92      93      94      95     96     97     98     99
- -----  ------  ------  ------  -----  -----  -----  ------
9.43%  10.90%  -2.21%  18.97%  3.85%  9.99%  9.62%  -1.07%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                   <C>    <C>     <C>
                                                              Fund Inception
                                               1 Year 5 Years (12/30/91)(3)
            ----------------------------------------------------------------
         Institutional Class                   -1.07% 8.07%   7.25%
            ----------------------------------------------------------------
         Administrative Class                  -1.32% 7.79%   6.98%
            ----------------------------------------------------------------
         Lehman Aggregate Bond Index(1)        -0.82% 7.73%   6.55%
            ----------------------------------------------------------------
         Lipper Intermediate Investment Grade
          Debt Fund Avg(2)                     -1.31% 6.79%   6.14%
            ----------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Lipper Intermediate Investment Grade Debt Fund Average is
                a total return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of five to ten
                years. It does not take into account sales charges.
            (3) The Fund began operations on 12/30/91. Index comparisons began
                on 12/31/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
          Share Class    Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              24
<PAGE>

            PIMCO Total Return Fund III                     Ticker Symbols:
                                                            PTSAX (Inst. Class)
                                                            PRFAX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Intermediate        B to Aaa; maximum 10%
and           total return,         maturity fixed      below Baa
Strategies    consistent with       income
              preservation of       securities          Dividend Frequency
              capital and                               Declared daily and
              prudent               Average Portfolio   distributed monthly
              investment            Duration
              management            3-6 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates. The Fund will not invest in the
            securities of any issuer determined by PIMCO to be engaged
            principally in the provision of healthcare services, the
            manufacture of alcoholic beverages, tobacco products,
            pharmaceuticals or military equipment, or the operation of
            gambling casinos. The Fund will also avoid, to the extent possible
            on the basis of information available to the Adviser, the purchase
            of securities of issuers engaged in the production or trade of
            pornographic materials. An issuer will be deemed to be principally
            engaged in an activity if it derives more than 10% of its gross
            revenues from such activities.

             The Fund invests primarily in investment grade securities, but
            may invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund will
            normally hedge at least 75% of its exposure to foreign currency to
            reduce the risk of loss due to fluctuations in exchange rates.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

             .Interest Rate Risk    .Derivatives Risk     .Currency Risk
             .Credit Risk           .Liquidity Risk       .Leveraging Risk
             .Market Risk           .Mortgage Risk        .Management Risk
             .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (4/11/97), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
25
<PAGE>

            PIMCO Total Return Fund III (continued)

            Calendar Year Total Returns -- Institutional Class

                                                Highest and Lowest Quarter
                                               Returns (for periods shown
                                               in the bar chart)
                                               -------------------------------
                                               Highest (1st Qtr. '95)     5.73%
                                               -------------------------------
                  [GRAPH]                      Lowest (1st Qtr. '94)     -2.68%

  92      93     94      95     96      97      98      99
- -----  ------  ------  ------  -----  ------  ------  ------
9.02%  12.64%  -3.43%  19.23%  4.63%  10.21%  10.37%  -0.95%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                   <C>    <C>     <C>
                                                              Fund Inception
                                               1 Year 5 Years (5/1/91)(3)
            ----------------------------------------------------------------
         Institutional Class                   -0.95% 8.49%   8.49%
            ----------------------------------------------------------------
         Administrative Class                  -1.20% 8.21%   8.22%
            ----------------------------------------------------------------
         Lehman Aggregate Bond Index(1)        -0.82% 7.73%   7.38%
            ----------------------------------------------------------------
         Lipper Intermediate Investment Grade
          Debt Fund Avg(2)                     -1.31% 6.79%   6.96%
            ----------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Lipper Intermediate Investment Grade Debt Fund Average is
                a total return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of five to ten
                years. It does not take into account sales charges.
            (3) The Fund began operations on 5/1/91. Index comparisons began
                on 4/30/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 26
<PAGE>

            PIMCO Total Return Mortgage Fund                  Ticker Symbols:
                                                              N/A (Inst. Class)
                                                              N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         Baa to Aaa; maximum
and           total return,          maturity fixed       10% below Aaa
Strategies    consistent with        income securities    Dividend Frequency
              preservation of
              capital and                                 Declared daily and
              prudent                Average Portfolio    distributed monthly
              investment             Duration 2-6 years
              management






            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in a
            diversified portfolio of mortgage-related Fixed Income Instruments
            of varying maturities (such as mortgage pass-through securities,
            collateralized mortgage obligations, commercial mortgage-backed
            securities and mortgage dollar rolls). The average portfolio
            duration of this Fund normally varies within a two- to six-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            invests primarily in securities that are in the highest rating
            category, but may invest up to 10% of its assets in investment
            grade securities rated below Aaa by Moody's or AAA by S&P, subject
            to a minimum rating of Baa by Moody's or BBB by S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may not invest in securities denominated in foreign currencies,
            but may invest without limit in U.S. dollar-denominated securities
            of foreign issuers.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Mortgage Risk         .Foreign Investment
              .Credit Risk           .Derivatives Risk       Risk
              .Market Risk           .Liquidity Risk        .Leveraging Risk
              .Issuer Risk                                  .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            The Administrative Class of the Fund has not commenced operations
            as of the date of this prospectus. Past performance is no
            guarantee of future results.

27 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Total Return Mortgage Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                      [GRAPH]               Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
                     98     99              ------------------------------------
                   -----  -----             Highest (3rd Qtr. '98)        2.78%
                   7.23%  2.42%             ------------------------------------
                                            Lowest (2nd Qtr. '99)        -0.13%

        Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                      <C>                  <C>
                                                                       Fund Inception
                                                  1 Year               (7/31/97)
            -------------------------------------------------------------------------
         Institutional Class                      2.42%                6.04%
            -------------------------------------------------------------------------
         Lehman Mortgage Index(1)                 1.86%                5.06%
            -------------------------------------------------------------------------
         Lipper U.S. Mortgage Fund Avg(2)         0.65%                4.12%
            -------------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Mortgage Index is an unmanaged index of
                mortgage-related fixed income securities with an average
                duration of 4.27 years as of 12/31/99. It is not possible to
                invest directly in the index.
            (2) The Lipper U.S. Mortgage Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest at least 65% of their assets in
                mortgages/securities issued or guaranteed as to principal and
                interest by the U.S. government and certain federal agencies.
                It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

         (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
         class.

         Examples. The Examples are intended to help you compare the cost of
         investing in Institutional Class or Administrative Class shares of the
         Fund with the costs of investing in other mutual funds. The Examples
         assume that you invest $10,000 in the noted class of shares for the
         time periods indicated, and then redeem all your shares at the end of
         those periods. The Examples also assume that your investment has a 5%
         return each year, the reinvestment of all dividends and distributions,
         and that the Fund'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.

<CAPTION>        Share Class
          Year 1         Year 3   Year 5         Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 28
<PAGE>

            PIMCO Investment Grade Corporate Bond Fund        Ticker Symbols:
                                                              N/A (Inst. Class)
                                                              N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Corporate fixed      B to Aaa; maximum
and           total return,          income               10% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration 3-7 years   distributed monthly
              investment
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of investment grade corporate fixed income
            securities of varying maturities. The average portfolio duration
            of this Fund normally varies within a three- to seven-year time
            frame based on PIMCO's forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

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

- --------------------------------------------------------------------------------
Performance The Fund does not yet have a full calendar year of performance.
Information Thus, no bar chart or annual returns table is included for the
            Fund.


  PIMCO Funds: Pacific Investment Management Series
29
<PAGE>

            PIMCO Investment Grade Corporate Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              30
<PAGE>

            PIMCO High Yield Fund                           Ticker Symbols:
                                                            PHIYX Inst. Class)
                                                            PHYAX (Admin. Class)

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Higher yielding      B to Aaa; minimum
and           total return,          fixed income         65% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration 2-6 years   distributed monthly
              investment
              management







            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of high yield securities ("junk bonds")
            rated below investment grade but rated at least B by Moody's or
            S&P, or, if unrated, determined by PIMCO to be of comparable
            quality. The remainder of the Fund's assets may be invested in
            investment grade Fixed Income Instruments. The average portfolio
            duration of this Fund normally varies within a two- to six-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            may invest up to 15% of its assets in euro-denominated securities
            and may invest without limit in U.S. dollar-denominated securities
            of foreign issuers. The Fund normally will hedge at least 75% of
            its exposure to the euro to reduce the risk of loss due to
            fluctuations in currency exchange rates.

             The Fund may invest up to 15% of its assets in derivative
            instruments, such as options, futures contracts or swap
            agreements. The Fund may invest all of its assets in mortgage- or
            asset-backed securities. The Fund may lend its portfolio
            securities to brokers, dealers, and other financial institutions
            to earn income. The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The "total return"
            sought by the Fund consists of income earned on the Fund's
            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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Issuer Risk        .Foreign Investment Risk
              .Credit Risk         .Liquidity Risk     .Currency Risk
              .High Yield Risk     .Derivatives Risk   .Leveraging Risk
              .Market Risk         .Mortgage Risk      .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (1/16/95), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
31
<PAGE>

            PIMCO High Yield Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                        [GRAPH]                     Highest and Lowest Quarter
                                                    Returns (for periods shown
  93      94      95     96      97     98     99   in the bar chart)
- ------  -----  ------  ------  ------  -----  ----- ----------------------------
18.70%  2.39%  20.68%  11.68%  12.21%  6.54%  2.82% Highest (1st Qtr.'93)  6.27%
                                                    ----------------------------
                                                    Lowest (3rd Qtr.'98)  -1.76%

                 Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                    <C>    <C>     <C>
                                                               Fund Inception
                                                1 Year 5 Years (12/16/92)(3)
            -----------------------------------------------------------------
         Institutional Class                    2.82%  10.82%  10.63%
            -----------------------------------------------------------------
         Administrative Class                   2.57%  10.55%  10.36%
            -----------------------------------------------------------------
         Lehman Brothers BB Intermediate
          Corporate Index(1)                    2.20%   9.38%   8.85%
            -----------------------------------------------------------------
         Lipper High Current Yield Fund Avg(2)  4.53%   8.84%   8.65%
            -----------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers BB Intermediate Corporate Index is an
                unmanaged index comprised of various fixed income securities
                rated BB with an average duration of 4.40 years as of
                12/31/99. It is not possible to invest directly in the index.
            (2) The Lipper High Current Yield Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that aim at high (relative) current yield from
                fixed income securities, have not quality or maturity
                restrictions, and tend to invest in lower grade debt issues.
                It does not take into account sales charges.
            (3) The Fund began operations on 12/16/92. Index comparisons began
                on 12/31/92.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
          Share Class    Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 32
<PAGE>

            PIMCO Long-Term U.S. Government Fund            Ticker Symbols:
                                                            PGOVX(Inst. Class)
                                                            PLGBX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Long-term            A to Aaa
and           total return,          maturity fixed
Strategies    consistent with        income securities    Dividend
              preservation of                             Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             (greater than or
              management             =) 8 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of fixed income securities that are issued
            or guaranteed by the U.S. Government, its agencies or government-
            sponsored enterprises ("U.S. Government Securities"). Assets not
            invested in U.S. Government Securities may be invested in other
            types of Fixed Income Instruments. The Fund also may obtain
            exposure to U.S. Government Securities through the use of futures
            contracts (including related options) with respect to such
            securities, and options on such securities, when PIMCO deems it
            appropriate to do so. While PIMCO may invest in derivatives at any
            time it deems appropriate, it will generally do so when it
            believes that U.S. Government Securities are overvalued relative
            to derivative instruments. This Fund will normally have a minimum
            average portfolio duration of eight years. For point of reference,
            the dollar-weighted average portfolio maturity of the Fund is
            normally expected to be more than ten years.

             The Fund's investments in Fixed Income Instruments are limited to
            those of investment grade U.S. dollar-denominated securities of
            U.S. issuers that are rated at least A by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. In
            addition, the Fund may only invest up to 10% of its assets in
            securities rated A by Moody's or S&P, and may only invest up to
            25% of its assets in securities rated Aa by Moody's or AA by S&P.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage-backed securities. The Fund may lend its portfolio
            securities to brokers, dealers and other financial institutions to
            earn income. The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The "total return"
            sought by the Fund consists of income earned on the Fund's
            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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Issuer Risk           .Leveraging Risk
              .Credit Risk           .Derivatives Risk      .Management Risk
              .Market Risk           .Mortgage Risk


            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (9/23/97), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.


  PIMCO Funds: Pacific Investment Management Series
33
<PAGE>

            PIMCO Long-Term U.S. Government Fund (continued)

            Calendar Year Total Returns -- Institutional Class

                                    [GRAPH]


  92      93      94      95     96      97      98      99
- ------  ------  ------  ------  -----  ------  ------  ------
11.93%  18.57%  -7.39%  31.57%  0.71%  15.02%  13.39%  -7.99%

                 Calendar Year End (through 12/31)


Highest and Lowest Quarter Returns
(for periods shown in the bar chart)
- ------------------------------------
Highest (2nd Qtr. '95)        10.76%
- ------------------------------------
Lowest (1st Qtr. '96)         -6.26%


Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>

                                                                  Fund Inception
                                                   1 Year 5 Years (7/1/91)(3)
         -----------------------------------------------------------------------
         <S>                                       <C>    <C>     <C>
         Institutional Class                       -7.99% 9.72%   10.35%
         -----------------------------------------------------------------------
         Administrative Class                      -8.21% 9.45%   10.09%
         -----------------------------------------------------------------------
         Lehman Long-Term Treasury Index(1)        -8.74% 9.08%    9.04%
         -----------------------------------------------------------------------
         Lipper General U.S. Government Fund Avg*  -3.01% 6.51%    6.46%
         -----------------------------------------------------------------------
</TABLE>

            (1) The Lehman Long-Term Treasury Index is an unmanaged index of
                U.S. Treasury issues with maturities greater than 10 years. It
                is not possible to invest directly in the index.
            (2) The Lipper General U.S. Government Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in U.S. government and agency issues. It does not take
                into account sales charges.
            (3) The Fund began operations on 7/1/91. Index comparisons began
                on 6/30/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.25%    None           0.25%       0.50%
         -----------------------------------------------------------------------
         Administrative  0.25     0.25%          0.26        0.76
         -----------------------------------------------------------------------

</TABLE>

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

         Share Class     Year 1   Year 3         Year 5      Year 10
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
         -----------------------------------------------------------------------
         Administrative   78       243            422         942
         -----------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 34
<PAGE>

            PIMCO Long Duration Fund                     Ticker Symbols:
                                                         N/A (Inst. Class)
                                                         N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Long-term            B to Aaa; maximum
and           total return,          maturity fixed       10% below Baa
Strategies    consistent with        income securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             (greater than or
              management             =) 8 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. This Fund will normally have a minimum average
            portfolio duration of eight years.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not yet have a full calendar year of performance.
Information Thus, no bar chart or annual returns table is included for the
            Fund.

  PIMCO Funds: Pacific Investment Management Series
35
<PAGE>

            PIMCO Long Duration Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.25%    None           0.25%       0.50%
         -----------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
         -----------------------------------------------------------------------

</TABLE>

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

         Share Class     Year 1   Year 3         Year 5      Year 10
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
         -----------------------------------------------------------------------
         Administrative   77       240            417         930
         -----------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              36
<PAGE>

            PIMCO Short Duration Municipal Income Fund   Ticker Symbols:
                                                         PSDIX (Inst. Class)
                                                         N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Short and            Baa to Aaa
and           current income         intermediate
Strategies    exempt from            maturity             Dividend Frequency
              federal income         municipal            Declared daily and
              tax, consistent        securities           distributed monthly
              with preservation      (exempt from
              of capital.            federal income
                                     tax)

                                     Average Portfolio
                                     Duration
                                     0-2 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in debt
            securities whose interest is, in the opinion of bond counsel for
            the issuer at the time of issuance, exempt from federal income tax
            ("Municipal Bonds"). Municipal Bonds generally are issued by or on
            behalf of states and local governments and their agencies,
            authorities and other instrumentalities.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The Fund may only invest in investment grade debt securities. The
            Fund may invest more than 25% of its assets in bonds of issuers in
            California and New York. To the extent that the Fund concentrates
            its investments in California or New York, it will be subject to
            California or New York State Specific Risk. The average portfolio
            duration of this Fund varies based on PIMCO's forecast for
            interest rates and under normal market conditions is not expected
            to exceed two years. The Fund will seek income that is high
            relative to prevailing rates from Municipal Bonds.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Derivatives Risk      .Management Risk
              .Credit Risk           .Mortgage Risk         .California State
              .Market Risk           .Leveraging Risk        Specific Risk
              .Issuer Risk                                  .New York State
                                                             Specific Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

  PIMCO Funds: Pacific Investment Management Series
37
<PAGE>

            PIMCO Short Duration Municipal Income Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder fees (fees paid directly from your investment)     None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
<CAPTION>

                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
                         Fees     (12b-1) Fees   Expenses(1) Expenses
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.20%    None           0.19%       0.39%
         -----------------------------------------------------------------------
         Administrative  0.20%    0.25%          0.19%       0.64%
         -----------------------------------------------------------------------

</TABLE>

            (1) Other expenses reflects a 0.19% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

                         Year 1   Year 3         Year 5      Year 10
         -----------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $40      $125           $219        $493
         -----------------------------------------------------------------------
         Administrative  $65      $205           $357        $798
         -----------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              38
<PAGE>

            PIMCO Municipal Bond Fund                 Ticker Symbols:
                                                      N/A (Inst. Class)
                                                      N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks high            Intermediate to     Ba to Aaa; maximum 10%
and           current income        long-term           below Baa
Strategies    exempt from           maturity
              federal income        municipal           Dividend Frequency
              tax, consistent       securities          Declared daily and
              with                  (exempt from        distributed monthly
              preservation of       federal income
              capital. Capital      tax)
              appreciation is
              a secondary           Average Portfolio
              objective.            Duration
                                    3-10 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in debt
            securities whose interest is, in the opinion of bond counsel for
            the issuer at the time of issuance, exempt from federal income tax
            ("Municipal Bonds"). Municipal Bonds generally are issued by or on
            behalf of states and local governments and their agencies,
            authorities and other instrumentalities.

             The Fund may invest up to 20% of its net assets in U.S.
            Government Securities, money market instruments and/or "private
            activity" bonds. For shareholders subject to the federal
            alternative minimum tax ("AMT"), distributions derived from
            "private activity" bonds must be included in their AMT
            calculations, and as such a portion of the Fund's distribution may
            be subject to federal income tax. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            net assets in Municipal Bonds or "private activity" bonds which
            are high yield securities ("junk bonds") rated at least Ba by
            Moody's or BB by S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund may invest more than 25% of its
            assets in bonds of issuers in California and New York. To the
            extent that the Fund concentrates its investments in California or
            New York, it will be subject to California or New York State
            Specific Risk. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. The average portfolio
            duration of this Fund normally varies within a three- to ten-year
            time frame, based on PIMCO's forecast for interest rates.

             The Fund may invest in derivative instruments, such as options,
            futures contracts, or swap agreements on U.S. Government
            Securities and Municipal Bonds, and invest in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

             .Interest Rate Risk    .Liquidity Risk       .Management Risk
             .Credit Risk           .Derivatives Risk     .California State
             .Market Risk           .Leveraging Risk       Specific Risk
             .Issuer Risk                                 .New York State
                                                           Specific Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (9/30/98), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
39
<PAGE>

            PIMCO Municipal Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class

                                    [GRAPH]


  98     99                                                 Highest and Lowest
- -----  ------                                               Quarter Returns
6.07%  -3.72%                                               (for periods shown
                                                            in the bar chart)
Calendar Year End (through 12/31)                           --------------------
                                                            Highest (3rd Qtr.
                                                            '98)           3.33%
                                                            --------------------
                                                            Lowest (2nd Qtr.
                                                            '99)          -2.45%


Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>

                                                              Fund Inception
                                               1 Year         (12/31/97)
   -------------------------------------------------------------------------
   <S>                                         <C>            <C>
   Institutional Class                         -3.72%         1.06%
   -------------------------------------------------------------------------
   Administrative Class                        -3.95%         0.64%
   -------------------------------------------------------------------------
   Lehman General Municipal Bond Index(1)      -2.07%         2.12%
   -------------------------------------------------------------------------
   Lipper General Municipal Fund Avg(2)        -4.63%         0.23%
   -------------------------------------------------------------------------
</TABLE>

            (1) The Lehman General Municipal Bond Index is an unmanaged index
                of municipal bonds with an average duration of 7.68 years as
                of 12/31/99. It is not possible to invest directly in the
                index.
            (2) The Lipper General Municipal Debt Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in municipal debt issues in the top four credit
                ratings. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
         ---------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   0.25%    None           0.25%       0.50%
         ---------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
         ---------------------------------------------------------------------

</TABLE>

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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>

         Share Class     Year 1   Year 3         Year 5      Year 10
         ---------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
         ---------------------------------------------------------------------
         Administrative   77       240            417         930
         ---------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              40
<PAGE>

            PIMCO California Intermediate
               Municipal Bond Fund                         Ticker Symbols:
                                                           N/A (Inst. Class)
                                                           N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Intermediate         B to Aaa; maximum
and           current income         maturity             10% below Baa
Strategies    exempt from            municipal
              federal and            securities           Dividend Frequency
              California income      (exempt from         Declared daily and
              tax. Capital           federal and          distributed monthly
              appreciation is a      California income
              secondary              tax)
              objective.
                                     Average Portfolio
                                     Duration
                                     3-7 years


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund invests under normal circumstances at least 65% of
            its net assets in debt securities whose interest is, in the
            opinion of bond counsel for the issuer at the time of issuance,
            exempt from regular federal income tax and California income tax
            ("California Municipal Bonds"). California Municipal Bonds
            generally are issued by or on behalf of the State of California
            and its political subdivisions, financing authorities and their
            agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame based on PIMCO's forecast for
            interest rates. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. Capital appreciation, if
            any, generally arises from decreases in interest rates or
            improving credit fundamentals for a particular state, municipality
            or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).


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

              .Interest Rate Risk    .Issuer Risk           .Mortgage Risk
              .Credit Risk           .Issuer                .Leveraging Risk
              .California State       Non-Diversification   .Management Risk
               Specific Risk          Risk
              .Market Risk           .Liquidity Risk
                                     .Derivatives Risk

             Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance  The Fund does not have a full calendar year of performance. Thus,
Information  no bar chart or annual returns table is included for the Fund.

41
  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO California Intermediate Municipal Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class and Administrative Class shares of
of the Fund the Fund:

            Shareholder fees (fees paid directly from your investment)     None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
                         Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.24%       0.49%
            ------------------------------------------------------------------
         Administrative  0.25%    0.25%          0.24%       0.74%
            ------------------------------------------------------------------

            (1) Other expenses reflects a 0.24% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class and Administrative Class
            shares of the Fund with the costs of investing in other mutual
            funds. The Examples assume that you invest $10,000 in the noted
            class of shares for the time periods indicated, and then redeem
            all your shares at the end of those periods. The Examples also
            assume that your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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.

<CAPTION>
                         Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $50      $157           $274        $616
            ------------------------------------------------------------------
         Administrative  $76      $237           $411        $918
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 42
<PAGE>

            PIMCO New York Intermediate
                                                              Ticker Symbols:
               Municipal Bond Fund                            N/A (Inst. Class)
                                                              N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Intermediate         B to Aaa; maximum
and           current income         maturity             10% below Baa
Strategies    exempt from            municipal
              federal and New        securities
              York income tax.       (exempt from
              Capital                federal and New      Dividend Frequency
              appreciation is a      York income tax)     Declared daily and
              secondary                                   distributed monthly
              objective.             Average Portfolio
                                     Duration 3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund will invest under normal circumstances at least 65%
            of its net assets in debt securities whose interest is, in the
            opinion of bond counsel for the issuer at the time of issuance,
            exempt from regular federal income tax and New York income tax
            ("New York Municipal Bonds"). New York Municipal Bonds generally
            are issued by or on behalf of the State of New York and its
            political subdivisions, financing authorities and their agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame based on PIMCO's forecast for
            interest rates. The Fund will seek income that is high relative to
            prevailing rates from municipal bonds. Capital appreciation, if
            any, generally arises from decreases in interest rates or
            improving credit fundamentals for a particular state, municipality
            or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn
            income.The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls).

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


              .Interest Rate Risk    .Issuer Risk                 .Mortgage Risk
              .Credit Risk           .Issuer Non-Diversification  .Leveraging
              .New York State         Risk                         Risk
               Specific Risk         .Liquidity Risk              .Management
              .Market Risk           .Derivatives Risk             Risk


            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

43 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO New York Intermediate Municipal Bond Fund (continued)


- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder fees (fees paid directly from your investment)     None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
                         Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.24%       0.49%
            ------------------------------------------------------------------
         Administrative  0.25%    0.25%          0.24%       0.74%
            ------------------------------------------------------------------

            (1) Other expenses reflects a 0.24% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
                         Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $50      $157           $274        $616
            ------------------------------------------------------------------
         Administrative  $76      $237           $411        $918
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 44
<PAGE>

            PIMCO Global Bond Fund                           Ticker Symbols:
                                                             PIGLX (Inst. Class)
                                                             N/A (Admin. Class)

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          U.S. and non-U.S.    B to Aaa; maximum
and           total return,          intermediate         10% below Baa
Strategies    consistent with        maturity fixed income
              preservation of        securities
              capital and                                  Dividend Frequency
              prudent                Average Portfolio     Declared daily and
              investment             Duration 3-7 years    distributed monthly
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in Fixed
            Income Instruments of issuers located in at least three countries
            (one of which may be the United States), which may be represented
            by futures contracts (including related options) with respect to
            such securities, and options on such securities. The Fund invests
            primarily in securities of issuers located in economically
            developed countries. Securities may be denominated in major
            foreign currencies, baskets of foreign currencies (such as the
            euro), or the U.S. dollar.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to, relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            Investments in the securities of issuers located outside the
            United States will normally vary between 25% and 75% of the Fund's
            assets. The average portfolio duration of this Fund normally
            varies within a three- to seven-year time frame. The Fund invests
            primarily in investment grade debt securities, but may invest up
            to 10% of its assets in high yield securities ("junk bonds") rated
            B or higher by Moody's or S&P, or, if unrated, determined by PIMCO
            to be of comparable quality. The Fund is non-diversified, which
            means that it may concentrate its assets in a smaller number of
            issuers than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Foreign Investment Risk    .Mortgage Risk
              .Credit Risk           .Currency Risk              .Derivatives
              .Market Risk           .Issuer Non-Diversification  Risk
              .Issuer Risk            Risk                       .Leveraging
                                     .Liquidity Risk              Risk
                                                                 .Management
                                                                  Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (7/31/96), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

45 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Global Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                                   Highest and Lowest
                  [GRAPH]                          Quarter Returns (for
                                                   periods shown in the
                                                   bar chart)
                                                   -----------------------------
  94      95      96      97      98      99       Highest (1st Qtr.'95)   8.40%
- ------  ------  ------  ------  ------  ------     -----------------------------
- -1.70%  22.96%  10.32%  -0.90%  12.50%  -4.29%     Lowest (1st Qtr.'97)   -4.40%

                 Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                     <C>    <C>     <C>
                                                                Fund Inception
                                                 1 Year 5 Years (11/23/93)(3)
            ------------------------------------------------------------------
         Institutional Class                     -4.29% 7.68%   6.57%
            ------------------------------------------------------------------
         Administrative Class                    -4.52% 7.45%   6.34%
            ------------------------------------------------------------------
         J.P. Morgan Global (Unhedged) Index(1)  -5.07% 6.69%   5.86%
            ------------------------------------------------------------------
         Lipper Global Income Fund Avg(2)        -2.43% 6.36%   4.45%
            ------------------------------------------------------------------
</TABLE>

            (1) The J.P. Morgan Global (Unhedged) Index is an unmanaged index
                representative of the total return performance in U.S. dollars
                on an unhedged basis of major world bond markets. It is not
                possible to invest directly in the index.
            (2) The Lipper Global Income Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest primarily in U.S. dollar and non-
                U.S. dollar debt securities of issuers located in at least
                three countries, one of which may be the United States. It
                does not take into account sales charges.
            (3) The Fund began operations on 11/23/93. Index comparisons began
                on 11/30/93.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.30%       0.55%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.30        0.80
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.30% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
          Share Class    Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $56      $176           $307        $689
            ------------------------------------------------------------------
         Administrative   82       255            444         990
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 46

<PAGE>

            PIMCO Global Bond Fund II                        Ticker Symbols:
                                                             PGBIX (Inst. Class)
                                                             N/A (Admin. Class)

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          U.S. and hedged      B to Aaa; maximum
and           total return,          foreign              10% below Baa
Strategies    consistent with        intermediate
              preservation of        maturity fixed
              capital                income securities    Dividend Frequency
                                                          Declared daily and
                                     Average Portfolio    distributed monthly
                                     Duration 3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in Fixed
            Income Instruments of issuers located in at least three countries
            (one of which may be the United States), which may be represented
            by futures contracts (including related options) with respect to
            such securities, and options on such securities. The Fund invests
            primarily in securities of issuers located in economically
            developed countries. Securities may be denominated in major
            foreign currencies, baskets of foreign currencies (such as the
            euro), or the U.S. dollar. The Fund 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.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to, relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            Investments in the securities of issuers located outside the
            United States will normally vary between 25% and 75% of the Fund's
            assets. The average portfolio duration of this Fund normally
            varies within a three- to seven-year time frame. The Fund invests
            primarily in investment grade securities, but may invest up to 10%
            of its assets in high yield securities ("junk bonds") rated B or
            higher by Moody's or S&P, or, if unrated, determined by PIMCO to
            be of comparable quality. The Fund is non-diversified, which means
            that it may concentrate its assets in a smaller number of issuers
            than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Foreign Investment Risk    .Mortgage Risk
              .Credit Risk         .Currency Risk              .Derivatives Risk
              .Market Risk         .Issuer Non-Diversification .Leveraging Risk
              .Issuer Risk          Risk                       .Management Risk
                                   .Liquidity Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            The Administrative Class of the Fund has not yet commenced
            operations as of the date of this prospectus. Past performance is
            no guarantee of future results.

47 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Global Bond Fund II (continued)

            Calendar Year Total Returns -- Institutional Class


                      [GRAPH]                       Highest and Lowest Quarter
                                                    Returns (for periods shown
                                                    in the bar chart)
           96     97     98     99                  ---------------------------
         ------  -----  -----  -----                Highest (3rd Qtr.96)  5.39%
         12.84%  8.68%  7.71%  0.29%                ---------------------------
                                                    Lowest (2nd Qtr.'99) -1.72%

                 Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                        <C>              <C>
                                                                     Fund Inception
                                                    1 Year           (10/2/95)(3)
            -----------------------------------------------------------------------
         Institutional Class                         0.29%           8.51%
            -----------------------------------------------------------------------
         J.P. Morgan Global (Hedged) Index(1)        0.73%           8.40%
            -----------------------------------------------------------------------
         Lipper Global Income Fund Avg(2)           -2.43%           4.63%
            -----------------------------------------------------------------------
</TABLE>

            (1)  The J.P. Morgan Global (Hedged) Index is an unmanaged index
                 representative of the total return performance in U.S.
                 dollars on a hedged basis of major world bond markets. It is
                 not possible to invest directly in the index.
            (2)  The Lipper Global Income Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc. that invest primarily in U.S. dollar and non-
                 U.S. dollar debt securities of issuers located in at least
                 three countries, one of which may be the United States. It
                 does not take into account sales charges.
            (3)  The Fund began operations on 10/2/95. Index comparisons began
                 on 9/30/95.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.30%       0.55%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.30        0.80
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.30% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $56      $176           $307        $689
            ------------------------------------------------------------------
         Administrative   82       255            444         990
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 48
<PAGE>

            PIMCO Foreign Bond Fund                          Ticker Symbols:
                                                             PFORX (Inst. Class)
                                                             N/A (Admin. Class)

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         B to Aaa; maximum
and           total return,          maturity hedged      10% below Baa
Strategies    consistent with        non-U.S. fixed
              preservation of        income securities
              capital and                                 Dividend Frequency
              prudent                Average Portfolio    Declared daily and
              investment             Duration 3-7 years   distributed monthly
              management

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 85% of its assets in Fixed
            Income Instruments of issuers located outside the United States,
            representing at least three foreign countries, which may be
            represented by futures contracts (including related options) with
            respect to such securities, and options on such securities. Such
            securities normally are denominated in major foreign currencies or
            baskets of foreign currencies (such as the euro). The Fund 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.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            assets in high yield securities ("junk bonds") rated B or higher
            by Moody's or S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund is non-diversified, which means that
            it may concentrate its assets in a smaller number of issuers than
            a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Foreign Investment Risk    .Mortgage Risk
              .Credit Risk         .Currency Risk              .Derivatives
              .Market Risk         .Issuer Non-Diversification  Risk
              .Issuer Risk          Risk                       .Leveraging Risk
                                   .Liquidity Risk             .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (1/28/97), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.

49 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Foreign Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class



                  [GRAPH]                            Highest and Lowest
                                                     Quarter Returns (for
                                                     periods shownin the bar
                                                     chart)
                                                     --------------------------
  93     94      95      96     97      98     99    Highest (4th Qtr.'95) 7.23%
- ------ ------  ------  ------  -----  ------  -----  ---------------------------
16.40% -7.30%  21.22%  18.89%  9.60%  10.03%  1.56%  Lowest (1st Qtr.'94) -4.22%

                 Calendar Year End (through 12/31)




            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                      <C>    <C>     <C>
                                                                 Fund Inception
                                                  1 Year 5 Years (12/3/92)(3)
            -------------------------------------------------------------------
         Institutional Class                       1.56% 12.04%  9.76%
            -------------------------------------------------------------------
         Administrative Class                      1.31% 11.76%  9.50%
            -------------------------------------------------------------------
         J.P. Morgan Non-U.S. Index (Hedged)(1)    2.48% 11.14%  9.11%
            -------------------------------------------------------------------
         Lipper International Income Fund Avg(2)  -4.57%  6.45%  6.06%
            -------------------------------------------------------------------
</TABLE>

            (1) The J.P. Morgan Non-U.S. Index (Hedged) in an unmanaged index
                representative of the total return performance in U.S. dollars
                of major non-U.S. bond markets with an average duration of
                5.62 years as of 12/31/99. It is not possible to invest
                directly in the index.
            (2) The Lipper International Income Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest primarily in U.S. dollar and non-
                U.S. dollar debt securities of issuers located in at least
                three countries, excluding the United States, except in
                periods of market weakness. It does not take into account
                sales charges.
            (3) The Fund began operations on 12/3/92. Index comparisons began
                on 11/30/92.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.25%    None           0.25%       0.50%
            ------------------------------------------------------------------
         Administrative  0.25     0.25%          0.25        0.75
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $51      $160           $280        $628
            ------------------------------------------------------------------
         Administrative   77       240            417         930
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 50
<PAGE>

            PIMCO Emerging Markets Bond Fund                Ticker Symbols:
                                                            N/A (Inst. Class)
                                                            N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Emerging market      B to Aaa
and           total return,          fixed income
Strategies    consistent with        securities           Dividend Frequency
              preservation of                             Declared daily and
              capital and            Average Portfolio    distributed monthly
              prudent                Duration
              investment             0-8 years
              management


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in Fixed
            Income Instruments of issuers that economically are tied to
            countries with emerging securities markets. Such securities may be
            denominated in non-U.S. currencies and the U.S. dollar. A security
            is economically tied to an emerging market country if it is
            principally traded on the country's securities markets, or the
            issuer is organized or principally operates in the country,
            derives a majority of its income from its operations within the
            country, or has a majority of its assets in the country. The
            average portfolio duration of this Fund varies based on PIMCO's
            forecast for interest rates and, under normal market conditions,
            is not expected to exceed eight years.

             PIMCO has broad discretion to identify and invest in countries
            that it considers to qualify as emerging securities markets.
            However, PIMCO generally considers an emerging securities market
            to be one located in any country that is defined as an emerging or
            developing economy by the World Bank or its related organizations,
            or the United Nations or its authorities. The Fund emphasizes
            countries with relatively low gross national product per capita
            and with the potential for rapid economic growth. PIMCO will
            select the Fund's country and currency composition based on its
            evaluation of relative interest rates, inflation rates, exchange
            rates, monetary and fiscal policies, trade and current account
            balances, and any other specific factors PIMCO believes to be
            relevant. The Fund likely will concentrate its investments in
            Asia, Africa, the Middle East, Latin America and the developing
            countries of Europe. The Fund may invest in securities whose
            return is based on the return of an emerging securities market,
            such as a derivative instrument, rather than investing directly in
            securities of issuers from emerging markets.

             The Fund may invest substantially all of its assets in high yield
            securities ("junk bonds") rated B or higher by Moody's or S&P, or,
            if unrated, determined by PIMCO to be of comparable quality. The
            Fund is non-diversified, which means that it may concentrate its
            assets in a smaller number of issuers than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Emerging Markets Risk   .Liquidity Risk
              .Credit Risk         .Foreign Investment Risk .Derivatives Risk
              .High Yield Risk     .Currency Risk           .Leveraging Risk
              .Market Risk         .Issuer                  .Management Risk
              .Issuer Risk          Non-Diversification
                                    Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (9/30/98), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.
  PIMCO Funds: Pacific Investment Management Series
51
<PAGE>

            PIMCO Emerging Markets Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                            Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
                     [GRAPH]                -----------------------------------
                                            Highest (4th Qtr. '98)      12.27%
                   98        99             -----------------------------------
                -------    ------           Lowest (3rd Qtr. '98)      -21.05%
                -11.76%    26.58%


         Calendar Year End (through 12/31)


            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                              <C>    <C>
                                                                 Fund Inception
                                                          1 Year (7/31/97)
            -------------------------------------------------------------------
         Institutional Class                              26.58%  3.45%
            -------------------------------------------------------------------
         Administrative Class                             26.28%  3.19%
            -------------------------------------------------------------------
         J.P. Morgan Emerging Markets Bond Index Plus(1)  25.99%  2.52%
            -------------------------------------------------------------------
         Lipper Emerging Market Debt Fund Avg(2)          24.51% -1.10%
            -------------------------------------------------------------------
</TABLE>

            (1)  The J.P. Morgan Emerging Markets Bond Index Plus is an
                 unmanaged index which tracks the total returns for external-
                 currency denominated debt instruments of emerging markets. It
                 is not possible to invest directly in the index.
            (2)  The Lipper Emerging Market Debt Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that seek either current income or
                 total return by investing at least 65% of total assets in
                 emerging market debt securities. It does not take into
                 account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.45%    None           0.40%       0.85%
            ------------------------------------------------------------------
         Administrative  0.45     0.25%          0.40        1.10
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.40% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $87      $271           $471        $1,049
            ------------------------------------------------------------------
         Administrative  112       350            606         1,340
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 52
<PAGE>

            PIMCO Strategic Balanced Fund                   Ticker Symbols:
                                                            PSBIX (Inst. Class)
                                                            PSBAX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         B to Aaa; maximum
and           total return,          maturity fixed       10% below Baa
Strategies    consistent with        income securities    Dividend Frequency
              preservation of        and S&P 500 stock    Declared and
              capital and            index derivatives    distributed
              prudent                                     quarterly
              investment             Average Portfolio
              management             Duration
                                     0-6 years

            The Fund seeks to achieve its investment objective by normally
            investing in a combination of fixed income securities and equity
            securities or derivatives on equity securities. The percentage of
            the Fund's assets invested in equities and equity derivatives or
            in fixed income securities will be determined based on
            methodology, developed by PIMCO, that forecasts stages in the
            business cycle and considers the risk and reward potential of
            equity and fixed income securities within specific phases of the
            business cycle. The Fund's equity exposure will vary between 45%
            and 75% of assets, and its fixed income exposure will range from a
            minimum of 25% to a maximum of 55%.

             The Fund's equity exposure normally consists of S&P 500
            derivatives, backed by a portfolio of short-term Fixed Income
            Instruments. PIMCO uses S&P 500 derivatives in addition to or in
            place of S&P 500 stocks to attempt to equal or exceed the
            performance of the S&P 500. The value of S&P 500 derivatives
            closely track changes in the value of the index. However, S&P 500
            derivatives may be purchased with a fraction of the assets that
            would be needed to purchase the equity securities directly, so
            that the remainder of the assets may be invested in Fixed Income
            Instruments. PIMCO will actively manage the fixed income assets
            serving as cover for derivatives, as well as any other fixed
            income assets held by the Fund, with a view toward enhancing the
            Fund's total return investment performance. Though the Fund does
            not normally invest directly in S&P 500 securities, when S&P 500
            derivatives appear to be overvalued relative to the S&P 500, the
            Fund may invest the equity portion of its assets in a "basket" of
            S&P 500 stocks.
             The Fund's fixed income exposure will normally consist of a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of the fixed income
            portion of this Fund's assets will normally vary within a three-
            to six-year time frame. The Fixed Income Instruments in which the
            Fund invests are primarily investment grade, but the Fund may
            invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar denominated securities of foreign issuers. The Fund 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.
             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income. The Fund may seek to obtain
            market exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of net income
            earned on the Fund's investments, plus capital appreciation
            arising from increases in the market value of the Fund's holdings.

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

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

              .Market Risk           .Derivatives Risk      .Mortgage Risk
              .Issuer Risk           .Liquidity Risk        .Leveraging Risk
              .Interest Rate Risk    .Foreign Investment    .Management Risk
              .Credit Risk            Risk
                                     .Currency Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of broad-based securities market indices and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (6/30/99), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.


  PIMCO Funds: Pacific Investment Management Series
53
<PAGE>

            PIMCO Strategic Balanced Fund (continued)

            Calendar Year Total Returns -- Institutional Class


                                            Highest and Lowest
                                            Quarter Returns
                      [GRAPH]               (for periods shown in the bar chart)
                                            -----------------------------------
                     97      98      99     Highest (2nd Qtr. '97)      12.23%
                   ------  ------  ------   -----------------------------------
                   24.17%  19.66%  11.56%   Lowest (3rd Qtr. '98)       -4.60%

                 Calendar Year End (through 12/31)


            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                               <C>    <C>
                                                                  Fund Inception
                                                           1 Year (6/28/96)(4)
            --------------------------------------------------------------------
         Institutional Class                               11.56% 18.74%
            --------------------------------------------------------------------
         Administrative Class                              11.26% 18.44%
            --------------------------------------------------------------------
         S&P 500 Index(1)                                  21.04% 27.14%
            --------------------------------------------------------------------
         S&P 500 and Lehman Aggregate Bond Index Blend(2)  12.00% 18.76%
            --------------------------------------------------------------------
         Lipper Balanced Fund Avg(3)                        8.73% 14.35%
            --------------------------------------------------------------------
</TABLE>

            (1) The Standard & Poor's 500 Composite Stock Price Index is an
                unmanaged index of common stocks. It is not possible to invest
                directly in the index.
            (2) The index used for the Fund is a static self-blended index
                consisting 60% of the S&P 500 Composite Stock Price Index and
                40% of the Lehman Brothers Aggregate Bond Index. The Fund
                believes this self-blended index reflects the Fund's
                investment strategy more accurately than the S&P 500 Index. It
                is not possible to invest directly in the index.
            (3) The Lipper Balanced Fund Average is a total return performance
                average of Funds tracked by Lipper Analytical Services, Inc.,
                whose primary objective is to conserve principal by
                maintaining at all times a balanced portfolio of both stocks
                and bonds. It does not take into account sales charges.
            (4) The Fund began operations on 6/28/96. Index comparisons began
                on 6/30/96.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.40%    None           0.25%       0.65%
            ------------------------------------------------------------------
         Administrative  0.40     0.25%          0.25        0.90
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $66      $208           $362        $  810
            ------------------------------------------------------------------
         Administrative   92       287            498         1,108
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              54
<PAGE>

            PIMCO Convertible Fund                           Ticker Symbols:
                                                             PFCIX (Inst. Class)
                                                             N/A (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Convertible          Caa to Aaa; maximum
and           total return,          securities           40% below Baa and
Strategies    consistent with                             10% below B
              prudent                Average Portfolio
              investment             Duration             Dividend Frequency
              management             N/A                  Declared and
                                                          distributed
                                                          quarterly


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of convertible securities. Convertible
            securities, which are typically issued by small to mid-size
            capitalization companies, include, but are not limited to:
            corporate bonds, debentures, notes or preferred stocks and their
            hybrids that can be converted into (exchanged for) common stock or
            other securities, such as warrants or options, which provide an
            opportunity for equity participation.


             The Fund invests primarily in investment grade debt securities,
            but may invest up to 40% of its assets in high yield securities
            ("junk bonds") rated Caa or higher by Moody's or CCC or higher by
            S&P or, if unrated, determined by PIMCO to be of comparable
            quality. The Fund may only invest up to 10% of its assets in
            convertible securities rated Caa or CCC or, if unrated, determined
            by PIMCO to be of comparable quality. The Fund may also invest up
            to 20% of its assets in securities denominated in foreign
            currencies, and may invest beyond this limit in U.S. dollar-
            denominated securities of foreign issuers. In addition, the Fund
            may invest up to 35% of its assets in common stocks or in other
            Fixed Income Instruments.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, and may
            invest in mortgage- or asset-backed securities. The Fund may lend
            its portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's investments, plus capital appreciation arising from
            increases in the market value of the Fund's holdings.

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

              .Market Risk           .High Yield Risk       .Foreign Investment
              .Issuer Risk           .Derivatives Risk       Risk
              .Interest Rate Risk    .Liquidity Risk        .Currency Risk
              .Credit Risk           .Smaller Company Risk  .Leveraging Risk
                                                            .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance As the Fund commenced operations in April, 1999, it does not yet
Information have a full calendar year of performance. Thus, no bar chart or
            annual returns table is included for the Fund.

  PIMCO Funds: Pacific Investment Management Series
55
<PAGE>

            PIMCO Convertible Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.40%    None           0.25%       0.65%
            ------------------------------------------------------------------
         Administrative  0.40     0.25%          0.25        0.90
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>        Share Class
          Year 1         Year 3   Year 5         Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $66      $208           $362         $810
            ------------------------------------------------------------------
         Administrative   92       287            498        1,108
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              56
<PAGE>

            PIMCO StocksPLUS Fund                           Ticker Symbols:
                                                            PSTKX (Inst. Class)
                                                            PPLAX (Admin. Class)
- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks total            S&P 500 stock        B to Aaa; maximum
and           return which           index derivatives    10% below Baa
Strategies    exceeds that of        backed by a
              the S&P 500            portfolio of         Dividend Frequency
                                     short-term fixed     Declared and
                                     income securities    distributed
                                                          quarterly
                                     Average Portfolio
                                     Duration
                                     0-1 year

            The Fund seeks to exceed the total return of the S&P 500 by
            investing under normal circumstances substantially all of its
            assets in S&P 500 derivatives, backed by a portfolio of Fixed
            Income Instruments. The Fund may invest in common stocks, options,
            futures, options on futures and swaps. The Fund uses S&P 500
            derivatives in addition to or in place of S&P 500 stocks to
            attempt to equal or exceed the performance of the S&P 500. The
            value of S&P 500 derivatives closely track changes in the value of
            the index. However, S&P 500 derivatives may be purchased with a
            fraction of the assets that would be needed to purchase the equity
            securities directly, so that the remainder of the assets may be
            invested in Fixed Income Instruments. PIMCO actively manages the
            fixed income assets held by the Fund with a view toward enhancing
            the Fund's total return, subject to an overall portfolio duration
            which is normally not expected to exceed one year.
             The S&P 500 is composed of 500 selected common stocks that
            represent approximately two-thirds of the total market value of
            all U.S. common stocks. The Fund is neither sponsored by nor
            affiliated with S&P. The Fund seeks to remain invested in S&P 500
            derivatives or S&P 500 stocks even when the S&P 500 is declining.
             Though the Fund does not normally invest directly in S&P 500
            securities, when S&P 500 derivatives appear to be overvalued
            relative to the S&P 500, the Fund may invest all of its assets in
            a "basket" of S&P 500 stocks. Individual stocks are selected based
            on an analysis of the historical correlation between the return of
            every S&P 500 stock and the return on the S&P 500 itself. PIMCO
            may employ fundamental analysis of factors such as earnings and
            earnings growth, price to earnings ratio, dividend growth, and
            cash flows to choose among stocks that satisfy the correlation
            tests. Stocks chosen for the Fund are not limited to those with
            any particular weighting in the S&P 500. The Fund also may invest
            in exchange traded funds based on the S&P 500, such as Standard &
            Poor's Depositary Receipts.
             Assets not invested in equity securities or derivatives may be
            invested in Fixed Income Instruments. The Fund may invest up to
            10% of its assets in high yield securities ("junk bonds") rated B
            or higher by Moody's or S&P, or, if unrated, determined by PIMCO
            to be of comparable quality. The Fund may invest up to 20% of its
            assets in securities denominated in foreign currencies and may
            invest beyond this limit in U.S. dollar denominated securities of
            foreign issuers. The Fund 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. In addition, the Fund may
            lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income.

- --------------------------------------------------------------------------------
Principal   Under certain conditions, generally in a market where the value of
Risks       both S&P 500 derivatives and fixed income securities are
            declining, the Fund may experience greater losses than would be
            the case if it invested directly in a portfolio of S&P 500 stocks.
            Among the principal risks of investing in the Fund, which could
            adversely affect its net asset value, yield and total return, are:

              .Market Risk           .Interest Rate Risk    .Mortgage Risk
              .Issuer Risk           .Liquidity Risk        .Leveraging Risk
              .Derivatives Risk      .Foreign Investment    .Management Risk
              .Credit Risk            Risk
                                     .Currency Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risk of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Institutional Class Shares.
            For periods prior to the inception date of Administrative Class
            shares (1/7/97), performance information shown in the table for
            that class is based on the performance of the Fund's Institutional
            Class shares. The prior Institutional Class performance has been
            adjusted to reflect the actual 12b-1/service fees and other
            expenses paid by Administrative Class shares. Past performance is
            no guarantee of future results.


  PIMCO Funds: Pacific Investment Management Series
57
<PAGE>

            PIMCO StocksPLUS Fund (continued)

            Calendar Year Total Returns -- Institutional Class



                  [GRAPH]                    Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
  94     95      96      97      98      99    --------------------------------
- -----  ------  ------  ------  ------  ------  Highest (4th Qtr. '98)    21.45%
2.92%  40.52%  23.07%  32.85%  28.33%  20.13%  --------------------------------
                                               Lowest (3rd Qtr. '98)     -9.77%

                 Calendar Year End (through 12/31)


            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                  <C>      <C>       <C>
                                                                 Fund Inception
                                              1 Year   5 Years   (5/13/93)(3)
            -------------------------------------------------------------------
         Institutional Class                  20.13%   28.78%    23.09%
            -------------------------------------------------------------------
         Administrative Class                 19.62%   28.36%    22.71%
            -------------------------------------------------------------------
         S&P 500 Index(1)                     21.04%   28.56%    22.38%
            -------------------------------------------------------------------
         Lipper Growth & Income Fund Avg(2)   13.71%   21.35%    16.88%
            -------------------------------------------------------------------
</TABLE>

            (1) The Standard & Poor's 500 Composite Stock Price Index is an
                unmanaged index of common stocks. It is not possible to invest
                directly in the index.
            (2) The Lipper Growth & Income Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that combine a growth-of-earnings orientation
                and an income requirement for level and/or rising dividends.
                It does not take into account sales charges.
            (3) The Fund began operations on 5/13/93. Index comparisons began
                on 4/30/93.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Institutional Class or Administrative Class shares of the
of the      Fund:
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>             <C>      <C>            <C>         <C>
                                  Distribution               Total Annual
                         Advisory and/or Service Other       Fund Operating
         Share Class     Fees     (12b-1) Fees   Expenses(1) Expenses
            ------------------------------------------------------------------
         Institutional   0.40%    None           0.25%       0.65%
            ------------------------------------------------------------------
         Administrative  0.40     0.25%          0.25        0.90
            ------------------------------------------------------------------

            (1) Other Expenses reflects a 0.25% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Institutional Class or Administrative Class shares
            of the Fund with the costs of investing in other mutual funds. The
            Examples assume that you invest $10,000 in the noted class of
            shares for the time periods indicated, and then redeem all your
            shares at the end of those periods. The Examples also assume that
            your investment has a 5% return each year, the reinvestment of all
            dividends and distributions, and that the Fund'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.

<CAPTION>
         Share Class     Year 1   Year 3         Year 5      Year 10
            ------------------------------------------------------------------
         <S>             <C>      <C>            <C>         <C>
         Institutional   $66      $208           $362         $810
            ------------------------------------------------------------------
         Administrative   92       287            498        1,108
            ------------------------------------------------------------------
</TABLE>

                                                                   Prospectus 58
<PAGE>


            Summary of Principal Risks

            The value of your investment in a Fund changes with the values of
            that Fund's investments. Many factors can affect those values. The
            factors that are most likely to have a material effect on a
            particular Fund's portfolio as a whole are called "principal
            risks." The principal risks of each Fund are identified in the
            Fund Summaries and are described in this section. Each Fund may be
            subject to additional principal risks and risks other than those
            described below because the types of investments made by a Fund
            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 Funds, their
            investments and the related risks. There is no guarantee that a
            Fund will be able to achieve its investment objective.

Interest    As interest rates rise, the value of fixed income securities held
Rate Risk   by a Fund 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.

Credit      A Fund could lose money if the issuer or guarantor of a fixed
Risk        income security, or the counterparty to a derivatives contract,
            repurchase agreement or a 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        Funds that invest in high yield securities and unrated securities
Yield       of similar credit quality (commonly known as "junk bonds") may be
Risk        subject to greater levels of interest rate, credit and liquidity
            risk than Funds that do not invest in such securities. High yield
            securities are considered predominately 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 a Fund's ability to sell its high yield securities
            (liquidity risk).

Market      The market price of securities owned by a Fund may go up or down,
Risk        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. Equity securities
            generally have greater price volatility than fixed income
            securities.

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 or
            services.

Liquidity
Risk
            Liquidity risk exists when particular investments are difficult to
            purchase or sell. A Fund's investments in illiquid securities may
            reduce the returns of the Fund because it may be unable to sell
            the illiquid securities at an advantageous time or price. Funds
            with principal investment strategies that involve foreign
            securities, derivatives or securities with substantial market
            and/or credit risk tend to have the greatest exposure to liquidity
            risk.
  PIMCO Funds: Pacific Investment Management Series
59
<PAGE>

Derivatives Derivatives are financial contracts whose value depends on, or is
Risk        derived from, the value of an underlying asset, reference rate or
            index. The various derivative instruments that the Funds 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 and
            Policies" in the Statement of Additional Information. The Funds
            typically use derivatives as a substitute for taking a position in
            the underlying asset and/or as part of a strategy designed to
            reduce exposure to other risks, such as interest rate or currency
            risk. The Funds may also use derivatives for leverage, in which
            case their use would involve leveraging risk. A Fund's use of
            derivative instruments involves risks different from, or possibly
            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 Fund 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 Fund will engage in these
            transactions to reduce exposure to other risks when that would be
            beneficial.

Mortgage    A Fund that purchases mortgage-related securities is subject to
Risk        certain additional risks. Rising interest rates tend to extend the
            duration of mortgage-related securities, making them more
            sensitive to changes in interest rates. As a result, in a period
            of rising interest rates, a Fund that holds mortgage-related
            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 a Fund because the Fund will have to reinvest that
            money at the lower prevailing interest rates.

Foreign     A Fund that invests in foreign securities may experience more
(Non-       rapid and extreme changes in value than a Fund that invests
U.S.)       exclusively in securities of U.S. companies. The securities
Investment  markets of many foreign countries are relatively small, with a
Risk        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 a Fund's investments in a
            foreign country. In the event of nationalization, expropriation or
            other confiscation, a Fund 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 a Fund invests a
            significant portion of its assets in a concentrated geographic
            area like Eastern Europe or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments.

Emerging    Foreign investment risk may be particularly high to the extent
Markets     that a Fund invests in emerging market securities of issuers based
Risk        in countries with developing economies. 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
            Funds that invest directly in foreign currencies or in securities
            that trade in, and receive revenues in, foreign (non-U.S.)
            currencies are 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.
                                                                   Prospectus
                                                                              60
<PAGE>

             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, or
            by the imposition of currency controls or other political
            developments in the U.S. or abroad. As a result, a Fund's
            investments in foreign currency-denominated securities may reduce
            the returns of the Fund.

Issuer      Focusing investments in a small number of issuers, industries or
Non-        foreign currencies increases risk. Funds that are "non-
Divers-     diversified" may invest a greater percentage of their assets in
ification   the securities of a single issuer (such as bonds issued by a
Risk        particular state) than Funds that are "diversified." Funds 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. Similarly, a Fund may be more sensitive to adverse
            economic, business or political developments if it invests a
            substantial portion of its assets in the bonds of similar projects
            or from issuers in the same state.

Leveraging  Certain transactions may give rise to a form of leverage. Such
Risk        transactions may include, among others, reverse repurchase
            agreements, loans of portfolios securities, and the use 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 Fund 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, may
            cause a Fund to be more volatile than if the Fund had not been
            leveraged. This is because leverage tends to exaggerate the effect
            of any increase or decrease in the value of a Fund's portfolio
            securities.

Smaller     The general risks associated with fixed income securities are
Company     particularly pronounced for securities issued by companies with
Risk        smaller market capitalizations. These companies may have limited
            product lines, markets or financial resources or they 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  Each Fund is subject to management risk because it is an actively
Risk        managed investment portfolio. PIMCO and each individual portfolio
            manager will apply investment techniques and risk analyses in
            making investment decisions for the Funds, but there can be no
            guarantee that these will produce the desired results.

California  A Fund that concentrates its investments in California municipal
State-      bonds may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of California issuers
Risk        to pay interest or repay principal. Provisions of the California
            Constitution and State statutes which limit the taxing and
            spending authority of California governmental entities may impair
            the ability of California issuers to pay principal and/or interest
            on their obligations. While California's economy is broad, its
            does have major concentrations in high technology, aerospace and
            defense-related manufacturing, trade, entertainment, real estate
            and financial services, and may be sensitive to economic problems
            affecting those industries. Future California political and
            economic developments, constitutional amendments, legislative
            measures, executive orders, administrative regulations, litigation
            and voter initiatives could have an adverse effect on the debt
            obligations of California issuers.


  PIMCO Funds: Pacific Investment Management Series
61
<PAGE>


New York    A Fund that concentrates its investments in New York municipal
State-      bonds may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of New York issuers
Risk        to pay interest or repay principal. Certain issuers of New York
            municipal bonds have experienced serious financial difficulties in
            recent years. A reoccurrence of these difficulties may impair the
            ability of certain New York issuers to pay principal or interest
            on their obligations. The financial health of New York City
            affects that of the State, and when New York City experiences
            financial difficulty it may have an adverse affect on New York
            municipal bonds held by the Fund. The growth rate of New York has
            recently been somewhat slower than the nation overall. The
            economic and financial condition of New York also may be affected
            by various financial, social, economic and political factors.

            Management of the Funds

Investment  PIMCO serves as the investment adviser and the administrator
Adviser     (serving in its capacity as administrator, the "Administrator")
and         for the Funds. Subject to the supervision of the Board of
Admini-     Trustees, PIMCO is responsible for managing the investment
strator     activities of the Funds and the Funds' business affairs and other
            administrative matters.

             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.

Advisory    Each Fund pays PIMCO fees in return for providing investment
Fees        advisory services. For the fiscal year ended March 31, 1999, the
            Funds paid monthly advisory fees to PIMCO at the following annual
            rates (stated as a percentage of the average daily net assets of
            each Fund taken separately):

<TABLE>
<CAPTION>
         Fund                                            Advisory Fees
            ------------------------------------------------------------------
         <S>                                             <C>           <C> <C>
         Money Market Fund                                   0.15%
         Short-Term, Low Duration, Low Duration II, Low
          Duration III, Low Duration Mortgage, Moderate
          Duration, Real Return Bond, Total Return,
          Total Return II, Total Return III, Total
          Return Mortgage, High Yield, Long-Term U.S.
          Government, Municipal Bond, Global Bond,
          Global Bond II, and Foreign Bond Funds             0.25%
         Strategic Balanced and StocksPLUS Funds             0.40%
         Emerging Markets Bond Fund                          0.45%
</TABLE>

             The Investment Grade Corporate Bond, Long Duration, Short
            Duration Municipal Income, California Intermediate Municipal Bond,
            New York Intermediate Municipal Bond and Convertible Funds were
            not operational during the fiscal year ended March 31, 1999. The
            investment advisory fees for the Investment Grade Corporate Bond,
            Long Duration, Short Duration Municipal Income, California
            Intermediate Municipal Bond, New York Intermediate Municipal Bond
            and Convertible Funds are at an annual rate of 0.25%, 0.25%,
            0.20%, 0.25%, 0.25% and 0.40%, respectively, based upon the
            average daily net assets of the Fund.

Admini-     Each Fund pays for the administrative services it requires under a
strative    fee structure which is essentially fixed. Institutional and
Fees        Administrative Class shareholders of each Fund pay an
            administrative fee to PIMCO, computed as a percentage of the
            Fund's assets attributable in the aggregate to that class of
            shares. PIMCO, in turn, provides or procures administrative
            services for Institutional and Administrative Class shareholders
            and also bears the costs of various third-party services required
            by the Funds, including audit, custodial, portfolio accounting,
            legal, transfer agency and printing costs. The result of this fee
            structure is an expense level for Institutional and Administrative
            Class shareholders of each Fund that, with limited exceptions, is
            precise and predictable under ordinary circumstances.
                                                                   Prospectus
                                                                              62
<PAGE>


             For the fiscal year ended March 31, 1999, the Funds paid PIMCO
            monthly administrative fees at the following annual rates (stated
            as a percentage of the average daily net assets attributable in
            the aggregate to the Fund's Institutional and Administrative Class
            shares):

<TABLE>
<CAPTION>
         Fund                                     Administrative Fees
            -----------------------------------------------------------------
         <S>                                      <C>
         Low Duration and Total Return Funds             0.18%
         Money Market, Short-Term and Moderate
          Duration Funds                                 0.20%
         Low Duration II, Low Duration III, Low
          Duration Mortgage, Real Return Bond,
          Total Return II, Total Return III,
          Total Return Mortgage, High Yield,
          Long-Term U.S. Government, Municipal
          Bond, Foreign Bond, Strategic Balanced
          and StocksPLUS Funds                           0.25%
         Global Bond and Global Bond II Funds            0.30%
         Emerging Markets Bond Fund                      0.40%
</TABLE>

             The Investment Grade Corporate Bond, Long Duration, Short
            Duration Municipal Income, California Intermediate Municipal Bond,
            New York Intermediate Municipal Bond, and Convertible Funds were
            not operational during the fiscal year ended March 31, 1999. The
            administrative fees for the Investment Grade Corporate Bond, Long
            Duration, Short Duration Municipal Income, California Intermediate
            Municipal Bond, New York Intermediate Municipal Bond and
            Convertible Funds are at an annual rate of 0.25%, 0.25%, 0.19%,
            0.24%, 0.24% and 0.25%, respectively, based upon the average daily
            net assets of the Fund.


  PIMCO Funds: Pacific Investment Management Series
63
<PAGE>

Individual  The following individuals have primary responsibility for managing
Portfolio   each of the noted Funds.
Managers

<TABLE>
<CAPTION>
                                                               Recent Professional
         Fund                      Portfolio Manager    Since  Experience
            ---------------------------------------------------------------------------
         <C>                       <C>                  <C>    <S>
         Money Market              Paul A. McCulley     11/99  Executive Vice
         Short-Term                                      8/99  President, PIMCO. He has
                                                               managed fixed income
                                                               assets since
                                                               joining PIMCO in 1999.
                                                               Prior to joining PIMCO,
                                                               Mr. McCulley was
                                                               associated with Warburg
                                                               Dillon Read as a
                                                               Managing Director from
                                                               1992-1999 and Head of
                                                               Economic and Strategy
                                                               Research for the
                                                               Americas from 1995-1999,
                                                               where he managed macro
                                                               research world-wide.

         Low Duration              William H. Gross      5/87* Managing Director, Chief
         Low Duration II                                11/91* Investment Officer and a
         Low Duration III                               12/96* founding partner of
         Moderate Duration                              12/96* PIMCO.
         Total Return                                    5/87* He leads a team which
         Total Return II                                12/91* manages the Moderate
         Total Return III                                5/91* Duration, Strategic
         Strategic Balanced                              1/98  Balanced and
         StocksPLUS                                      1/98  StocksPLUS Funds.

         Low Duration Mortgage     W. Scott Simon        4/00  Executive Vice
         Total Return Mortgage                           4/00  President, PIMCO. He
                                                               joined PIMCO as a
                                                               Portfolio Manager in
                                                               2000. Prior to that, he
                                                               was a Senior Managing
                                                               Director and co-head of
                                                               MBS pass-through trading
                                                               at Bear Stearns & Co.

         Real Return Bond          John B. Brynjolfsson  1/97* Executive Vice
                                                               President, PIMCO. He
                                                               joined PIMCO as a
                                                               Portfolio Manager in
                                                               1989, and has managed
                                                               fixed income accounts
                                                               for various
                                                               institutional clients
                                                               and funds since that
                                                               time from 1992-1998.

         Long-Term U.S.            James M. Keller       4/00  Executive Vice
         Government                                            President, PIMCO. He
         Long Duration                                    **   joined PIMCO as a
                                                               Portfolio Manager in
                                                               1996,
                                                               and has managed fixed
                                                               income accounts for
                                                               various institutional
                                                               clients since that time.
         Investment Grade          Sharon K. Kilmer       **   Executive Vice
          Corporate Bond                                       President, PIMCO. She
                                                               joined PIMCO as a
                                                               Portfolio Manager in
                                                               1998. Prior to joining
                                                               PIMCO, she was Vice
                                                               President and Director
                                                               of the fixed income
                                                               portfolio group at
                                                               Transamerica Investment
                                                               Services from 1982-1998.

         High Yield                Benjamin L. Trosky   12/92* Managing Director,
                                                               PIMCO. He joined PIMCO
                                                               as a Portfolio Manager
                                                               in 1990,
                                                               and has managed fixed
                                                               income accounts for
                                                               various institutional
                                                               clients and funds since
                                                               that time.

         Short Duration            Mark V. McCray        4/00  Senior Vice President,
          Municipal Income                                     PIMCO. He joined PIMCO
         Municipal Bond                                  4/00  as a Portfolio Manager
         California Intermediate                         4/00  in 2000.
          Municipal Bond                                       Prior to that, he was a
         New York Intermediate                           4/00  bond trader from 1992-
          Municipal Bond                                       1999 at Goldman Sachs &
                                                               Co. where
                                                               he was appointed Vice
                                                               President in 1996 and
                                                               named co-head of
                                                               municipal bond
                                                               trading in 1997 with
                                                               responsibility for the
                                                               firm's proprietary
                                                               account and
                                                               supervised  municipal
                                                               bond traders.

         Global Bond               Lee R. Thomas, III    7/95  Managing Director and
         Global Bond II                                 10/95* Senior International
         Foreign Bond                                    7/95  Portfolio Manager,
                                                               PIMCO. He joined
                                                               PIMCO as a Portfolio
                                                               Manager in 1995, and has
                                                               managed fixed income
                                                               accounts
                                                               for various
                                                               institutional clients
                                                               and funds since that
                                                               time. Prior to joining
                                                               PIMCO,
                                                               he was associated with
                                                               Investcorp as a member
                                                               of the management
                                                               committee
                                                               responsible for global
                                                               securities and foreign
                                                               exchange trading.

         Emerging Markets Bond     Mohamed A. El-Erian   8/99  Managing Director,
                                                               PIMCO. He joined PIMCO
                                                               as a Portfolio Manager
                                                               in 1999.
                                                               Prior to joining PIMCO,
                                                               he was a Managing
                                                               Director from 1998-1999
                                                               for Salomon Smith
                                                               Barney/Citibank, where
                                                               he was head of emerging
                                                               markets research. Prior
                                                               to that he was
                                                               associated with the
                                                               International Monetary
                                                               Fund as a Deputy
                                                               Director and Advisor
                                                               from 1983-1998.

         Convertible               Sandra K. Durn        4/99* Senior Vice President,
                                                               PIMCO. She joined PIMCO
                                                               as a Portfolio Manager
                                                               in 1999. Prior to
                                                               joining PIMCO in 1999,
                                                               she was associated with
                                                               Nicholas-Applegate
                                                               Capital Management where
                                                               she was a Convertible
                                                               Securities Portfolio
                                                               Manager from 1995 to
                                                               1999, and a Quantitative
                                                               Analyst since 1994.
</TABLE>
            -------
            * Since inception of the Fund.
            **Fund has not commenced operation as of the date of this
            Prospectus.

Distributor
            The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors L.P. The Distributor, located
            at 2187 Atlantic Street, Stamford CT 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.
                                                                   Prospectus
                                                                              64
<PAGE>

            Investment Options--
            Institutional Class and Administrative Class Shares

            The Trust offers investors Institutional Class and Administrative
            Class shares of the Funds in this Prospectus.

             The Trust does not charge any sales charges (loads) or other fees
            in connection with purchases, sales (redemptions) or exchanges of
            Institutional Class or Administrative Class shares. Administrative
            Class shares are subject to a higher level of operating expenses
            than Institutional Class shares due to the additional service
            and/or distribution fees paid by Administrative Class shares as
            described below. Therefore, Institutional Class shares will
            generally pay higher dividends and have a more favorable
            investment return than Administrative Class shares.

              . Service and Distribution (12b-1) Fees--Administrative Class
            Shares. The Trust has adopted an Administrative Services Plan for
            the Administrative Class shares of each Fund. It has also adopted
            a Distribution Plan for the Administrative Class shares of each
            Fund. Each Plan has been adopted in accordance with the
            requirements of Rule 12b-1 under the Investment Company Act of
            1940 and is administered in accordance with that rule. However,
            shareholders do not have the voting rights set forth in Rule 12b-1
            with respect to the Administrative Services Plan.

             Each Plan allows the Funds to use its Administrative Class assets
            to reimburse financial intermediaries that provide services
            relating to Administrative Class shares. The Distribution Plan
            permits reimbursement for expenses in connection with the
            distribution and marketing of Administrative Class shares and/or
            the provision of shareholder services to Administrative Class
            shareholders. The Administrative Services Plan permits
            reimbursement for services in connection with the administration
            of plans or programs that use Administrative Class shares of the
            Funds as their funding medium and for related expenses.

             In combination, the Plans permit a Fund to make total
            reimbursements at an annual rate of up to 0.25% of the Fund's
            average daily net assets attributable to its Administrative Class
            shares. The same entity may not receive both distribution and
            administrative services fees with respect to the same
            Administrative Class assets, but may receive fees under each Plan
            with respect to separate assets. Because these fees are paid out
            of a Fund's Administrative Class assets on an ongoing basis, over
            time they will increase the cost of an investment in
            Administrative Class shares and may cost an investor more than
            other types of sales charges.

              . Arrangements with Service Agents. Institutional Class and
            Administrative Class shares of the Funds may be offered through
            certain brokers and financial intermediaries ("service agents")
            that have established a shareholder servicing relationship with
            the Trust on behalf of their customers. The Trust pays no
            compensation to such entities other than service and/or
            distribution fees paid with respect to Administrative Class
            shares. Service agents may impose additional or different
            conditions than the Trust on purchases, redemptions or exchanges
            of Fund shares by their customers. Service agents may also
            independently establish and charge their customers transaction
            fees, account fees and other amounts in connection with purchases,
            sales and redemptions of Fund shares in addition to any fees
            charged by the Trust. These additional fees may vary over time and
            would increase the cost of the customer's investment and lower
            investment returns. Each service agent is responsible for
            transmitting to its customers a schedule of any such fees and
            information regarding any additional or different conditions
            regarding purchases, redemptions and exchanges. Shareholders who
            are customers of service agents should consult their service
            agents for information regarding these fees and conditions.
  PIMCO Funds: Pacific Investment Management Series
65
<PAGE>

            Purchases, Redemptions and Exchanges

            Investors may purchase Institutional Class and Administrative
Purchasing  Class shares of the Funds at the relevant net asset value ("NAV")
Shares      of that class without a sales charge or other fee.

             Institutional Class shares are offered primarily for direct
            investment by investors such as pension and profit sharing plans,
            employee benefit trusts, endowments, foundations, corporations and
            high net worth individuals. Institutional Class shares may also be
            offered through certain financial intermediaries that charge their
            customers transaction or other fees with respect to their
            customers' investments in the Funds.

             Administrative Class shares are offered primarily through
            employee benefit plan alliances, broker-dealers and other
            intermediaries, and each Fund pays service and/or distribution
            fees to these entities for services they provide to Administrative
            Class shareholders.

             Pension and profit-sharing plans, employee benefit trusts and
            employee benefit plan alliances and "wrap account" programs
            established with broker-dealers or financial intermediaries may
            purchase shares of either class only if the plan or program for
            which the shares are being acquired will maintain an omnibus or
            pooled account for each Fund and will not require a Fund to pay
            any type of administrative payment per participant account to any
            third party. Shares may be offered to clients of PIMCO and its
            affiliates, and to the benefit plans of PIMCO and its affiliates.

              . Investment Minimums. The minimum initial investment for shares
            of either class is $5 million, except that the minimum initial
            investment for a registered investment adviser purchasing
            Institutional Class shares for its clients through omnibus
            accounts is $250,000 per Fund. In addition, the minimum initial
            investment does not apply to Institutional Class shares offered
            through fee-based programs sponsored and maintained by a
            registered broker-dealer and approved by the Distributor which
            each investor pays an asset based fee at an annual rate of at
            least 0.50% of the assets in the account to a financial
            intermediary for investment advisory and/or administrative
            services.

             The Trust and the Distributor may waive the minimum initial
            investment for other categories of investors at their discretion.

             The investment minimums discussed in this section and the
            limitations set forth in "Investment Limitations" below do not
            apply to participants in PIMCO Advisors Portfolio Strategies, a
            managed product sponsored by PIMCO Advisors.

              . Timing of Purchase Orders and Share Price Calculations. A
            purchase order received by the Trust's transfer agent, National
            Financial Data Services ("Transfer Agent"), prior to the close of
            regular trading (normally 4:00 p.m., Eastern time) on the New York
            Stock Exchange, on a day the Trust is open for business, together
            with payment made in one of the ways described below, will be
            effected at that day's NAV. An order received after the close of
            regular trading on the New York Stock Exchange will be effected at
            the NAV determined on the next business day. However, orders
            received by certain retirement plans and other financial
            intermediaries on a business day prior to the close of regular
            trading on the New York Stock Exchange and communicated to the
            Transfer Agent prior to 9:00 a.m., Eastern time, on the following
            business day will be effected at the NAV determined on the prior
            business day. The Trust is "open for business" on each day the New
            York Stock Exchange is open for trading, which excludes the
            following holidays: New Year's Day, Martin Luther King, Jr. Day,
            Presidents' Day, Good Friday, Memorial Day, Independence Day,
            Labor Day, Thanksgiving Day and Christmas Day. Purchase orders
            will be accepted only on days on which the Trust is open for
            business.

              . Initial Investment. Investors may open an account by
            completing and signing a Client Registration Application and
            mailing it to PIMCO Funds at 840 Newport Center Drive, Suite 300,
            Newport Beach, California 92660. A Client Registration Application
            may be obtained by calling 1-800-927-4648.
                                                                   Prospectus
                                                                              66
<PAGE>


             Except as described below, an investor may purchase Institutional
            Class and Administrative Class shares only by wiring federal funds
            to the Trust's Transfer Agent, National Financial Data Services,
            330 West 9th Street, 4th Floor, Kansas City, Missouri 64105.
            Before wiring federal funds, the investor must telephone the Trust
            at 1-800-927-4648 to receive instructions for wire transfer and
            must provide the following information: name of authorized person,
            shareholder name, shareholder account number, name of Fund and
            share class, amount being wired, and wiring bank name.

             An investor may purchase shares without first wiring federal
            funds if the proceeds of the investment are derived from an
            advisory account the investor maintains with PIMCO or one of its
            affiliates, from surrender or other payment from an annuity,
            insurance, or other contract held by Pacific Life Insurance
            Company, or from an investment by broker-dealers, institutional
            clients or other financial intermediaries which have established a
            shareholder servicing relationship with the Trust on behalf of
            their customers.

              . Additional Investments. An investor may purchase additional
            Institutional Class and Administrative Class shares of the Funds
            at any time by calling the Trust and wiring federal funds to the
            Transfer Agent as outlined above.

              . Other Purchase Information. Purchases of a Fund's
            Institutional Class and Administrative Class shares will be made
            in full and fractional shares. In the interest of economy and
            convenience, certificates for shares will not be issued.

             The Trust and the Distributor each reserves the right, in its
            sole discretion, to suspend the offering of shares of the Funds 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 Trust.

             An investor should invest in the Funds for long-term investment
            purposes only. The Trust and PIMCO each reserves the right to
            restrict purchases of Fund shares (including exchanges) 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.

             Institutional Class and Administrative Class shares of the Trust
            are not qualified or registered for sale in all states. Investors
            should inquire as to whether shares of a particular Fund are
            available for offer and sale in the investor's state of residence.
            Shares of the Trust may not be offered or sold in any state unless
            registered or qualified in that jurisdiction or unless an
            exemption from registration or qualification is available.

             Subject to the approval of the Trust, an investor may purchase
            shares of a Fund with liquid securities that are eligible for
            purchase by the Fund (consistent with the Fund's investment
            policies and restrictions) and that have a value that is readily
            ascertainable in accordance with the Trust's valuation policies.
            These transactions will be effected only if PIMCO intends to
            retain the security in the Fund as an investment. Assets purchased
            by a Fund in such a transaction will be valued in generally the
            same manner as they would be valued for purposes of pricing the
            Fund's shares, if such assets were included in the Fund's assets
            at the time of purchase. The Trust reserves the right to amend or
            terminate this practice at any time.

              . Retirement Plans. Shares of the Funds are available for
            purchase by retirement and savings plans, including Keogh plans,
            401(k) plans, 403(b) custodial accounts, and Individual Retirement
            Accounts. The administrator of a plan or employee benefits office
            can provide participants or employees with detailed information on
            how to participate in the plan and how to elect a Fund as an
            investment option. Participants in a retirement or savings plan
            may be permitted to elect different investment options, alter the
            amounts contributed to the plan, or change how contributions are
            allocated among investment options in accordance with the plan's
            specific provisions. The plan administrator or employee benefits
            office should be consulted for
  PIMCO Funds: Pacific Investment Management Series
67
<PAGE>

            details. For questions about participant accounts, participants
            should contact their employee benefits office, the plan
            administrator, or the organization that provides recordkeeping
            services for the plan. Investors who purchase shares through
            retirement plans should be aware that plan administrators may
            aggregate purchase and redemption orders for participants in the
            plan. Therefore, there may be a delay between the time the
            investor places an order with the plan administrator and the time
            the order is forwarded to the Transfer Agent for execution.

Redeeming     . Redemptions by Mail. An investor may redeem (sell)
Shares      Institutional Class and Administrative Class shares by submitting
            a written request to PIMCO Funds at 840 Newport Center Drive,
            Suite 300, Newport Beach, California 92660. The redemption request
            should state the Fund from which the shares are to be redeemed,
            the class of shares, the number or dollar amount of the shares to
            be redeemed and the account number. The request must be signed
            exactly as the names of the registered owners appear on the
            Trust's account records, and the request must be signed by the
            minimum number of persons designated on the Client Registration
            Application that are required to effect a redemption.

              . Redemptions by Telephone or Other Wire Communication. An
            investor that elects this option on the Client Registration
            Application (or subsequently in writing) may request redemptions
            of shares by calling the Trust at 1-800-927-4648, by sending a
            facsimile to 1-949-725-6830, or by other means of wire
            communication. Investors should state the Fund and class from
            which the shares are to be redeemed, the number or dollar amount
            of the shares to be redeemed and the account number. Redemption
            requests of an amount of $10 million or more may be initiated by
            telephone, but must be confirmed in writing by an authorized party
            prior to processing.

             In electing a telephone redemption, the investor authorizes PIMCO
            and the Transfer Agent to act on telephone instructions from any
            person representing himself to be the investor, and reasonably
            believed by PIMCO or the Transfer Agent to be genuine. Neither the
            Trust nor the Transfer Agent may be liable for any loss, cost or
            expense for acting on instructions (whether in writing or by
            telephone) believed by the party receiving such instructions to be
            genuine and in accordance with the procedures described in this
            Prospectus. Shareholders should realize that by electing the
            telephone or wire redemption option, they may be giving up a
            measure of security that they might have if they were to redeem
            their shares in writing. Furthermore, interruptions in telephone
            service may mean that a shareholder will be unable to effect a
            redemption by telephone when desired. The Transfer Agent also
            provides written confirmation of transactions initiated by
            telephone as a procedure designed to confirm that telephone
            instructions are genuine (written confirmation is also provided
            for redemption requests received in writing). All telephone
            transactions are recorded, and PIMCO or the Transfer Agent may
            request certain information in order to verify that the person
            giving instructions is authorized to do so. The Trust or Transfer
            Agent may be liable for any losses due to unauthorized or
            fraudulent telephone transactions if it fails to employ reasonable
            procedures to confirm that instructions communicated by telephone
            are genuine. All redemptions, whether initiated by letter or
            telephone, will be processed in a timely manner, and proceeds will
            be forwarded by wire in accordance with the redemption policies of
            the Trust detailed below. See "Other Redemption Information."

             Shareholders may decline telephone exchange or redemption
            privileges after an account is opened by instructing the Transfer
            Agent in writing at least seven business days prior to the date
            the instruction is to be effective. Shareholders may experience
            delays in exercising telephone redemption privileges during
            periods of abnormal market activity. During periods of volatile
            economic or market conditions, shareholders may wish to consider
            transmitting redemption orders by telegram, facsimile or overnight
            courier.

             Defined contribution plan participants may request redemptions by
            contacting the employee benefits office, the plan administrator or
            the organization that provides recordkeeping services for the
            plan.
                                                                   Prospectus
                                                                              68
<PAGE>


              . Timing of Redemption Requests and Share Price Calculations. A
            redemption request received by the Trust or its designee prior to
            the close of regular trading on the New York Stock Exchange
            (normally 4:00 p.m., Eastern time), on a day the Trust is open for
            business, is effective on that day. A redemption request received
            after that time becomes effective on the next business day.
            Redemption requests for Fund shares are effected at the NAV per
            share next determined after receipt of a redemption request by the
            Trust or its designee. The request must properly identify all
            relevant information such as account number, redemption amount (in
            dollars or shares), the Fund name, and must be executed or
            initiated by the appropriate signatories.

              . Other Redemption Information. Redemption proceeds will
            ordinarily be wired to the investor's bank within three business
            days after the redemption request, but may take up to seven
            business days. Redemption proceeds will be sent by wire only to
            the bank name designated on the Client Registration Application.
            Redemptions of Fund shares may be suspended when trading on the
            New York Stock Exchange is restricted or during an emergency which
            makes it impracticable for the Funds to dispose of their
            securities or to determine fairly the value of their net assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors. Under these
            and other unusual circumstances, the Trust may suspend redemptions
            or postpone payment for more than seven days, as permitted by law.

             For shareholder protection, a request to change information
            contained in an account registration (for example, a request to
            change the bank designated to receive wire redemption proceeds)
            must be received in writing, signed by the minimum number of
            persons designated on the Client Registration Application that are
            required to effect a redemption, and accompanied by a signature
            guarantee from any eligible guarantor institution, as determined
            in accordance with the Trust's procedures. Shareholders should
            inquire as to whether a particular institution is an eligible
            guarantor institution. A signature guarantee cannot be provided by
            a notary public. In addition, corporations, trusts, and other
            institutional organizations are required to furnish evidence of
            the authority of the persons designated on the Client Registration
            Application to effect transactions for the organization.

             Due to the relatively high cost of maintaining small accounts,
            the Trust reserves the right to redeem Institutional Class and
            Administrative Class shares in any account for their then-current
            value (which will be promptly paid to the investor) if at any
            time, due to redemption by the investor, the shares in the account
            do not have a value of at least $100,000. A shareholder will
            receive advance notice of a mandatory redemption and will be given
            at least 30 days to bring the value of its account up to at least
            $100,000. This mandatory redemption policy does not apply to
            participants in PIMCO Advisors Portfolio Strategies, a managed
            product sponsored by PIMCO Advisors.

             The Trust agrees to redeem shares of each Fund solely in cash up
            to the lesser of $250,000 or 1% of the Fund's net assets during
            any 90-day period for any one shareholder. In consideration of the
            best interests of the remaining shareholders, the Trust 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 a
            Fund in lieu of cash. It is highly unlikely that shares would ever
            be redeemed in kind. When shares are redeemed in kind, the
            redeeming shareholder should expect to incur transaction costs
            upon the disposition of the securities received in the
            distribution.

Exchange    An investor may exchange Institutional Class or Administrative
Privilege   Class shares of a Fund for shares of the same class of any other
            Fund or other series of the Trust that offers that class based on
            the respective NAVs of the shares involved. An exchange may be
            made by following the redemption procedure described above under
            "Redemptions by Mail" or, if the investor has elected the
            telephone redemption option, by calling the Trust at 1-800-927-
            4648. An investor may also exchange shares of a Fund for shares of
            the same class of a series of



  PIMCO Funds: Pacific Investment Management Series
69
<PAGE>

            PIMCO Funds: Multi-Manager Series, an affiliated mutual fund
            family composed primarily of equity portfolios managed by PIMCO
            Advisors and its subsidiary partnerships. Shareholders interested
            in such an exchange may request a prospectus for these other
            series by contacting PIMCO Funds at the same address and telephone
            number as the Trust.

             An investor may exchange shares only with respect to Funds or
            other eligible series that are registered in the investor's state
            of residence or where an exemption from registration is available.
            An exchange order is treated the same for tax purposes as a
            redemption followed by a purchase and may result in a capital gain
            or loss, and special rules may apply in computing tax basis when
            determining gain or loss. See "Tax Consequences" in this
            Prospectus and "Taxation" in the Statement of Additional
            Information.

             The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO, the purchase would adversely affect a Fund
            and its shareholders. In particular, a pattern of exchanges
            characteristic of "market-timing" strategies may be deemed by
            PIMCO to be detrimental to the Trust or a particular Fund.
            Currently, the Trust limits the number of "round trip" exchanges
            investors may make. An investor makes a "round trip" exchange when
            the investor purchases shares of a particular Fund, subsequently
            exchanges those shares for shares of a different PIMCO Fund, and
            then exchanges back into the originally purchased Fund. The Trust
            has the right to refuse any exchange for any investor who
            completes (by making the exchange back into the shares of the
            originally purchased Fund) more than six round trip exchanges in
            any twelve-month period. The Trust reserves the right to impose
            additional restrictions on exchanges at any time, although it will
            attempt to give shareholders 30 days' prior notice whenever it is
            reasonably able to do so.

            How Fund Shares Are Priced

            The net asset value ("NAV") of a Fund's Institutional and
            Administrative Class shares is determined by dividing the total
            value of a Fund's portfolio investments and other assets
            attributable to that class, less any liabilities, by the total
            number of shares outstanding of that class.

             Except for the Money Market Fund, for purposes of calculating
            NAV, 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.

             The Money Market Fund's securities are valued using the amortized
            cost method of valuation, which involves valuing a security at
            cost on the date of acquisition and thereafter assuming a constant
            accretion of a discount or amortization of a premium to maturity,
            regardless of the impact of fluctuating interest rates on the
            market value of the instrument. While this method provides
            certainty in valuation, it may result in periods during which
            value, as determined by amortized cost, is higher or lower than
            the price the Fund would receive if it sold the instrument.

             Investments initially valued in currencies other than the U.S.
            dollar are converted to U.S. dollars using exchange rates obtained
            from pricing services. As a result, the NAV of a Fund's shares may
            be affected by
                                                                   Prospectus
                                                                              70
<PAGE>

            changes in the value of currencies in relation to the U.S. dollar.
            The value of securities traded in markets outside the United
            States or denominated in currencies other than the U.S. dollar may
            be affected significantly on a day that the New York Stock
            Exchange is closed and an investor is not able to purchase, redeem
            or exchange shares.

             Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time) (the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Funds normally use pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Funds or its agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Funds 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 the NYSE
            Close.

             Under certain circumstances, the per share NAV of the
            Administrative Class shares of the Funds may be lower than the per
            share NAV of the Institutional Class shares as a result of the
            daily expense accruals of the service and/or distribution fees
            paid by Administrative Class shares. Generally, for Funds that pay
            income dividends, those dividends are expected to differ over time
            by approximately the amount of the expense accrual differential
            between the two classes.

            Fund Distributions

            Each Fund distributes substantially all of its net investment
            income to shareholders in the form of dividends. A shareholder
            begins earning dividends on Fund shares the day after the Trust
            receives the shareholder's purchase payment. Dividends paid by
            each Fund with respect to each class of shares are calculated in
            the same manner and at the same time, but dividends on
            Administrative Class shares are expected to be lower than
            dividends on Institutional Class shares as a result of the
            distribution fees applicable to Administrative Class shares. The
            following shows when each Fund intends to declare and distribute
            income dividends to shareholders of record.

<TABLE>
<CAPTION>
                                              Declared Daily
                                                 and Paid     Declared and
         Fund                                    Monthly     Paid Quarterly
            ---------------------------------------------------------------
         <S>                                  <C>            <C>
         Fixed Income Funds                         .
            ---------------------------------------------------------------
         Strategic Balanced, Convertible and
          StocksPLUS Funds                                         .
            ---------------------------------------------------------------
</TABLE>

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

             A Fund's dividend and capital gain distributions with respect to
            a particular class of shares will automatically be reinvested in
            additional shares of the same class of the Fund at NAV unless the
            shareholder elects to have the distributions paid in cash. A
            shareholder may elect to have distributions paid in cash on the
            Client Registration Application or by submitting a written
            request, signed by the appropriate signatories, indicating the
            account number, Fund name(s) and wiring instructions. Shareholders
            do not pay any sales charges on shares received through the
            reinvestment of Fund distributions.

  PIMCO Funds: Pacific Investment Management Series
71
<PAGE>


            Tax Consequences

              . Taxes on Fund Distributions. A shareholder subject to U.S.
            federal income tax will be subject to tax on Fund distributions
            whether they are paid in cash or reinvested in additional shares
            of the Funds. For federal income tax purposes, Fund distributions
            will be taxable to the shareholder as either ordinary income or
            capital gains.

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

             Fund distributions are taxable to shareholders even if they are
            paid from income or gains earned by a Fund 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 Fund distribution will pay
            full price for the shares and may receive a portion of his or her
            investment back as a taxable distribution.

              . Taxes on Redemption or Exchanges of Shares. Any gain resulting
            from the sale of Fund shares will generally be subject to federal
            income tax. When a shareholder exchanges shares of a Fund for
            shares of another series, the transaction will be treated as a
            sale of the Fund shares for these purposes, and any gain on those
            shares will generally be subject to federal income tax.

              . A Note on the Real Return Bond Fund. Periodic adjustments for
            inflation to the principal amount of an inflation-indexed bond may
            give rise to original issue discount, which will be includable in
            the Fund's gross income. Due to original issue discount, the Fund
            may be required to make annual distributions to shareholders that
            exceed the cash received, which may cause the Fund to liquidate
            certain investments when it is not advantageous to do so. Also, if
            the principal value of an inflation-indexed bond is adjusted
            downward due to deflation, amounts previously distributed in the
            taxable year may be characterized in some circumstances as a
            return of capital.

              . A Note on the Municipal Funds. Dividends paid to shareholders
            of the Municipal Funds and derived from Municipal Bond interest
            are expected to be designated by the Funds as "exempt-interest
            dividends" and shareholders may generally exclude such dividends
            from gross income for federal income tax purposes. The federal tax
            exemption for "exempt-interest dividends" from Municipal Bonds
            does not necessarily result in the exemption of such dividends
            from state and local taxes although the California Intermediate
            Municipal Bond Fund, and the New York Intermediate Municipal Bond
            Fund intend to arrange their affairs so that a portion of such
            distributions will be exempt from state taxes in the respective
            state. Each Municipal Fund may invest a portion of its assets in
            securities that generate income that is not exempt from federal or
            state income tax. Dividends derived from taxable interest or
            capital gains will be subject to federal income tax. The interest
            on "private activity" bonds is a tax-preference item for purposes
            of the federal alternative minimum tax. As a result, for
            shareholders that are subject to the alternative minimum tax,
            income derived from "private activity" bonds will not be exempt
            from federal income tax. The Municipal Funds seek to produce
            income that is generally exempt from federal income tax and will
            not benefit investors in tax-sheltered retirement plans or
            individuals not subject to federal income tax. Further, the
            California and New York Intermediate Municipal Bond Funds seek to
            produce income that is generally exempt from the relevant state's
            income tax and will not benefit individuals that are not subject
            to that state's income tax.
                                                                   Prospectus
                                                                              72
<PAGE>


             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 Fund dividends and capital distributions.
            Please see the Statement of Additional Information for additional
            information regarding the tax aspects of investing in the Funds.

            Characteristics and Risks of
            Securities and Investment Techniques

            This section provides additional information about some of the
            principal investments and related risks of the Funds described
            under "Summary Information" above. It also describes
            characteristics and risks of additional securities and investment
            techniques that may be used by the Funds 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
            of securities and investment techniques that may be used by the
            Funds. As with any mutual fund, investors in the Funds 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 Funds.

Securities  Most of the Funds in this prospectus seek maximum total return.
Selection   The total return sought by a Fund consists of both income earned
            on a Fund's investments and capital appreciation, if any, arising
            from increases in the market value of a Fund'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 selecting securities for a Fund, PIMCO develops an outlook for
            interest rates, currency exchange rates and the economy; analyzes
            credit and call risks, and uses other security selection
            techniques. The proportion of a Fund'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. economy and the economies of other
            countries in the world, the financial markets and other factors.

             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.        U.S. Government Securities are obligations of, or guaranteed by,
Government  the U.S. Government, its agencies or government-sponsored
Securities  enterprises. 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.

Municipal   Municipal bonds are generally issued by states and local
Bonds       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. The types of municipal bonds in which the
            Funds may invest include municipal lease obligations. The Funds
            may also invest in securities issued by entities whose underlying
            assets are municipal bonds.



  PIMCO Funds: Pacific Investment Management Series
73
<PAGE>


            Each Fund may invest in mortgage- or other asset-backed
Mortgage-   securities. Except for the Money Market, Short Duration Municipal
Related     Income, Municipal Bond, California Intermediate Municipal Bond,
and Other   New York Intermediate Municipal Bond, and Convertible Funds, each
Asset-      Fund may invest all of its assets in such securities. Mortgage-
Backed      related securities include mortgage pass-through securities,
Securities  collateralized mortgage obligations ("CMOs"), commercial mortgage-
            backed securities, mortgage dollar rolls, CMO residuals, stripped
            mortgage-backed securities ("SMBSs") 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 a Fund 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 SMBS has one class receiving all of the interest from
            the mortgage assets (the interest-only, or "IO" class), while the
            other class will receive all of the principal (the principal-only,
            or "PO" class). The yield to maturity on an IO 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 a
            Fund's yield to maturity from these securities. A Fund may not
            invest more than 5% of its assets in any combination of IO, PO, or
            inverse floater securities. The Funds may invest in other asset-
            backed securities that have been offered to investors.

Loan
Participations
and
Assignments
            Certain Funds may invest in fixed- and floating-rate 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 a Fund 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.

Corporate   Corporate debt securities are subject to the risk of the issuer's
Debt        inability to meet principal and interest payments on the
Securities  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.

High        Securities rated lower than Baa by Moody's Investors Service, Inc.
Yield       ("Moody's") or lower than BBB by Standard & Poor's Ratings
Securities  Services ("S&P") 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
                                                                   Prospectus
                                                                              74
<PAGE>

            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 predominately
            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 this 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 Fund 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 Fund 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
            Fund 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 Fund invests in high yield and/or unrated securities, the
            Fund's success in achieving its investment objective may depend
            more heavily on the portfolio manager's creditworthiness analysis
            than if the Fund invested exclusively in higher-quality and rated
            securities.

Variable    Variable and floating rate securities provide for a periodic
and         adjustment in the interest rate paid on the obligations. Each Fund
Floating    may invest in floating rate debt instruments ("floaters") and
Rate        (except the Money Market Fund) engage in credit spread trades.
Securities  While floaters provide a certain degree of protection against
            rises in interest rates, a Fund will participate in any declines
            in interest rates as well. Each Fund (except the Money Market
            Fund) may also invest in inverse floating rate debt instruments
            ("inverse floaters"). An inverse floater may exhibit greater price
            volatility than a fixed rate obligation of similar credit quality.
            A Fund may not invest more than 5% of its assets in any
            combination of inverse floater, interest only, or principal only
            securities.

Inflation-  Inflation-indexed bonds are fixed income securities whose
Indexed     principal value is periodically adjusted according to the rate of
Bonds       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.




Event-      Each Fund (except the Money Market Fund) may invest in "event-
Linked      linked bonds," which are fixed income securities for which the
Bonds       return of principal and payment of interest is contingent on the
            non-occurrence of a



  PIMCO Funds: Pacific Investment Management Series
75
<PAGE>

            specific "trigger" event, such as a hurricane, earthquake, or
            other physical or weather-related phenomenon. Some event-linked
            bonds are commonly referred to as "catastrophe bonds." If a
            trigger event occurs, a Fund may lose a portion or all of its
            principal invested in the bond. Event-linked bonds often provide
            for an extension of maturity to process and audit loss claims
            where a trigger event has, or possibly has, occurred. An extension
            of maturity may increase volatility. Event-linked bonds may also
            expose the Fund to certain unanticipated risks including credit
            risk, adverse regulatory or jurisdictional interpretations, and
            adverse tax consequences. Event-linked bonds may also be subject
            to liquidity risk.

            Each Fund may invest in convertible securities. Convertible
Convertible securities are generally preferred stocks and other securities,
and         including fixed income securities and warrants, that are
Equity      convertible into or exercisable for common stock at a stated price
Securities  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 Fund may be forced to convert
            a security before it would otherwise choose, which may have an
            adverse effect on the Fund's ability to achieve its investment
            objective.

             While the Fixed Income Funds 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 Fund may
            consider convertible securities or equity securities to gain
            exposure to such investments.

             Equity securities generally have greater price volatility than
            fixed income securities. The market price of equity securities
            owned by a Fund may go up or down, sometimes rapidly or
            unpredictably. Equity securities may decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The value of
            an equity security may also 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 or
            services.

Foreign     Investing in foreign securities involves special risks and
(Non-       considerations not typically associated with investing in U.S.
U.S.)       securities. Shareholders should consider carefully the substantial
Securities  risks involved for Funds that invest 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 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.

             Certain Funds also may invest in sovereign debt issued by
            governments, their agencies or instrumentalities, or other
            government-related entities. Holders of sovereign debt may be
            requested to participate in the
                                                                   Prospectus
                                                                              76
<PAGE>

            rescheduling of such debt and to extend further loans to
            governmental entities. In addition, there is no bankruptcy
            proceeding by which defaulted sovereign debt may be collected.

               .  Emerging Market Securities. The Emerging Markets Bond Fund
            invests primarily in securities of issuers based in countries with
            developing (or "emerging market") economies, while the Short-Term,
            Low Duration and Low Duration III Funds may invest up to 5% of
            their assets in such securities and each remaining Fund that may
            invest in foreign securities may invest up to 10% of its assets in
            such securities. 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;
            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 Fund. 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 Fund 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.

             Each Fund (except the Low Duration II, Total Return II, Long-Term
            U.S. Government, Short Duration Municipal Income, Municipal Bond,
            California Intermediate Municipal Bond and New York Intermediate
            Municipal Bond Funds) 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 a Fund may be
            subject to restructuring arrangements or to requests for new
            credit, which may cause the Fund to suffer a loss of interest or
            principal on any of its holdings.

Foreign     A Fund that invests directly in foreign currencies or in
(Non-       securities that trade in, or receive revenues in, foreign
U.S.)       currencies will be subject to currency risk. Foreign currency
Currencies  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,
            uncertainty surrounds the introduction of the euro (a common
            currency unit for the European Union) and the effect it may have
            on the value of European currencies as well as securities
            denominated in local European currencies. These and other
            currencies in which the Funds' assets are denominated may be
            devalued against the U.S. dollar, resulting in a loss to the
            Funds.
  PIMCO Funds: Pacific Investment Management Series
77
<PAGE>


              . Foreign Currency Transactions. Funds that invest in securities
            denominated in foreign currencies 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 a Fund'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 a Fund 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 realized if the value of the hedged
            currency increases. A Fund 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 a Fund 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 Fund to benefit
            from favorable fluctuations in relevant foreign currencies. A Fund
            may use one currency (or a basket of currencies) to hedge against
            adverse changes in the value of another currency (or a basket of
            currencies) when exchange rates between the two currencies are
            positively correlated. The Fund 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.

Repurchase  Each Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer and agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund 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     Each Fund may enter into reverse repurchase agreements and dollar
Repurchase  rolls, subject to a Fund's limitations on borrowings. A reverse
Agreements, repurchase agreement or dollar roll involves the sale of a
Dollar      security by a Fund and its agreement to repurchase the instrument
Rolls and   at a specified time and price, and may be considered a form of
Other       borrowing for some purposes. A Fund will segregate assets
Borrowings  determined to be liquid by PIMCO in accordance with procedures
            established by the Board of Trustees or otherwise cover its
            obligations under reverse repurchase agreements, dollar rolls, and
            other borrowings. Reverse repurchase agreements, dollar rolls and
            other forms of borrowings may create leveraging risk for a Fund.

            Each Fund may borrow money to the extent permitted under the
            Investment Company Act of 1940 ("1940 Act"), as amended. This
            means that, in general, a Fund may borrow money from banks for any
            purpose on a secured basis in an amount up to 1/3 of the Fund's
            total assets. A Fund may also borrow money for temporary
            administrative purposes on an unsecured basis in an amount not to
            exceed 5% of the Fund's total assets.

Derivatives Each Fund (except the Money Market Fund) 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 swap agreements. Each
            Fund (except the Money Market Fund) may invest some or all of its
            assets in derivative instruments. A portfolio manager may decide
            not to employ any of these strategies and there is no assurance
            that any derivatives strategy used by a Fund will succeed. A
            description of these and other derivative instruments that the
            Funds may use are described under "Investment Objectives and
            Policies" in the Statement of Additional Information.
                                                                   Prospectus
                                                                              78
<PAGE>


             A Fund's use of derivative instruments involves risks different
            from, or possibly 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 Funds.

             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 Fund uses derivatives
            for leverage, investments in that Fund will tend to be more
            volatile, resulting in larger gains or losses in response to
            market changes. To limit leverage risk, each Fund 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 Fund
            will engage in derivatives transactions at any time or from time
            to time. A Fund'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 Fund'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 Fund, the Fund 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 Fund investments. A Fund may also have to buy or sell a
            security at a disadvantageous time or price because the Fund 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 Fund. 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 Fund's use of derivatives may cause
            the Fund to realize higher amounts of short-term capital gains
            (generally taxed at ordinary income tax rates) than if the Fund
            had not used such instruments.
  PIMCO Funds: Pacific Investment Management Series
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<PAGE>


Delayed     The Funds (except the Money Market and Municipal Bond Funds) may
Funding     also enter into, or acquire participations in, delayed funding
Loans and   loans and revolving credit facilities, in which a lender agrees to
Revolving   make loans up to a maximum amount upon demand by the borrower
Credit      during a specified term. These commitments may have the effect of
Facilities  requiring a Fund 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 a Fund 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.

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

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

            Subject to the restrictions and limitations of the 1940 Act, each
            Fund may, in the future, elect to pursue its investment objective
            by investing in one or more underlying investment vehicles or
            companies that have substantially similar investment objectives,
            policies and limitations as the Fund.

Short       Each Fund may make short sales as part of its overall portfolio
Sales       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.
            Short sales expose a Fund 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 Fund. A Fund making a short sale 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.

Illiquid    Each Fund may invest up to 15% (10% in the case of the Money
Securities  Market Fund) 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 Fund 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.

                                                                   Prospectus
                                                                              80
<PAGE>

Loans of    For the purpose of achieving income, each Fund may lend its
Portfolio   portfolio securities to brokers, dealers, and other financial
Securities  institutions provided a number of conditions are satisfied,
            including that the loan is fully collateralized. Please see
            "Investment Objectives and Policies" in the Statement of
            Additional Information for details. When a Fund lends portfolio
            securities, its investment performance will continue to reflect
            changes in the value of the securities loaned, and the Fund 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 Fund may pay
            lending fees to a party arranging the loan.

Portfolio   The length of time a Fund has held a particular security is not
Turnover    generally a consideration in investment decisions. A change in the
            securities held by a Fund is known as "portfolio turnover." Each
            Fund 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 Fund, 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 generally taxed at ordinary income tax rates).
            The trading costs and tax effects associated with portfolio
            turnover may adversely affect a Fund's performance.

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

Changes     The investment objective of the Global Bond Fund II may be changed
in          by the Board of Trustees without shareholder approval. The
Investment  investment objective of each other Fund is fundamental and may not
Objectives  be changed without shareholder approval. Unless otherwise stated,
and         all other investment policies of the Funds may be changed by the
Policies    Board of Trustees without shareholder approval.

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

Other       The Funds may invest in other types of securities and use a
Investments variety of investment techniques and strategies which are not
and         described in this Prospectus. These securities and techniques may
Techniques  subject the Funds 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 Funds.
  PIMCO Funds: Pacific Investment Management Series
81
<PAGE>

                      (THIS PAGE INTENTIONALLY LEFT BLANK)
                                                                   Prospectus
                                                                              82
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help a shareholder
            understand the financial performance of Institutional and
            Administrative Class shares of each Fund for the past 5 years or,
            if the class is less than 5 years old, since the class of shares
            was first offered. Certain information reflects financial results
            for a single Fund share. The total returns in the table represent
            the rate that an investor would have earned or lost on an
            investment in a particular class of shares of a Fund, assuming
            reinvestment of all dividends and distributions. This information
            has been audited by PricewaterhouseCoopers LLP, whose report,
            along with each Fund's financial statements, are included in the
            Trust's annual report to shareholders. The annual report is
            incorporated by reference in the Statement of Additional
            Information and is available free of charge upon request from the
            Distributor.

<TABLE>
<CAPTION>
                         Net Asset              Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value      Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning Investment  Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   Income     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Money Market
 Institutional Class
 09/30/1999(b)            $ 1.00     $0.02(a)      $ 0.00 (a)    $0.02       $(0.02)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                 1.00      0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
 03/31/1998                 1.00      0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
 03/31/1997                 1.00      0.05           0.00         0.05        (0.05)       0.00          0.00          0.00
 11/01/1995 - 03/31/1996    1.00      0.02           0.00         0.02        (0.02)       0.00          0.00          0.00
 10/31/1995(a)              1.00      0.06           0.00         0.06        (0.06)       0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)              1.00      0.02(a)        0.00 (a)     0.02        (0.02)       0.00          0.00          0.00
 03/31/1999                 1.00      0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
 03/31/1998                 1.00      0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
 03/31/1997                 1.00      0.05           0.00         0.05        (0.05)       0.00          0.00          0.00
 11/01/1995 - 03/31/1996    1.00      0.02           0.00         0.02        (0.02)       0.00          0.00          0.00
 01/24/1995 -
  10/31/1995(a)             1.00      0.05           0.00         0.05        (0.05)       0.00          0.00          0.00
Short-Term
 Institutional Class
 09/30/1999(b)            $10.03     $0.28(a)      $(0.07)(a)    $0.21       $(0.28)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.06      0.57(a)       (0.02)(a)     0.55        (0.57)       0.00          0.00         (0.01)
 03/31/1998                10.00      0.62(a)        0.06 (a)     0.68        (0.60)      (0.01)        (0.01)         0.00
 03/31/1997                 9.92      0.61           0.08         0.69        (0.59)      (0.02)         0.00          0.00
 03/31/1996                 9.79      0.69           0.12         0.81        (0.65)      (0.03)         0.00          0.00
 03/31/1995                 9.92      0.56          (0.13)        0.43        (0.55)      (0.01)         0.00          0.00
 Administrative Class
 09/30/1999(b)             10.03      0.27(a)       (0.07)(a)     0.20        (0.27)       0.00          0.00          0.00
 03/31/1999                10.06      0.54(a)       (0.02)(a)     0.52        (0.54)       0.00          0.00         (0.01)
 03/31/1998                10.00      0.59(a)        0.07 (a)     0.66        (0.58)      (0.01)        (0.01)         0.00
 03/31/1997                 9.92      0.58           0.08         0.66        (0.57)      (0.01)         0.00          0.00
 02/01/1996 - 03/31/1996    9.98      0.11          (0.07)        0.04        (0.10)       0.00          0.00          0.00
Low Duration
 Institutional Class
 09/30/1999(b)            $10.10     $0.31(a)      $(0.20)(a)    $0.11       $(0.31)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.18      0.65(a)       (0.02)(a)     0.63        (0.65)       0.00         (0.01)        (0.05)
 03/31/1998                 9.98      0.65(a)        0.23 (a)     0.88        (0.63)      (0.02)        (0.03)         0.00
 03/31/1997                 9.95      0.64           0.03         0.67        (0.63)      (0.01)         0.00          0.00
 03/31/1996                 9.76      0.66           0.21         0.87        (0.68)       0.00          0.00          0.00
 03/31/1995                10.04      0.65          (0.30)        0.35        (0.54)       0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)             10.10      0.30(a)       (0.20)(a)     0.10        (0.30)       0.00          0.00          0.00
 03/31/1999                10.18      0.62(a)       (0.02)(a)     0.60        (0.62)       0.00         (0.01)        (0.05)
 03/31/1998                 9.98      0.63(a)        0.22 (a)     0.85        (0.60)      (0.02)        (0.03)         0.00
 03/31/1997                 9.95      0.62           0.03         0.65        (0.60)      (0.02)         0.00          0.00
 03/31/1996                 9.76      0.63           0.21         0.84        (0.65)       0.00          0.00          0.00
 12/31/1994 - 03/31/1995    9.67      0.18           0.07         0.25        (0.14)       0.00          0.00          0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
    period.
(b) Unaudited
  PIMCO Funds: Pacific Investment Management Series
83
<PAGE>




<TABLE>
<CAPTION>
                                                                 Ratio of Net
Tax Basis                Net Asset        Net Assets  Ratio of    Investment
 Return                    Value             End     Expenses to  Income to   Portfolio
   of          Total        End    Total  of Period    Average     Average    Turnover
 Capital   Distributions of Period Return   (000's)  Net Assets   Net Assets    Rate
- ---------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>    <C>        <C>         <C>          <C>
 $ 0.00       $(0.02)     $ 1.00    2.37% $  271,338    0.35%+       4.57%+      N/A
   0.00        (0.05)       1.00    5.14     322,290    0.35         4.85        N/A
   0.00        (0.05)       1.00    5.40      55,335    0.35         5.29        N/A
   0.00        (0.05)       1.00    5.19      23,497    0.40         5.08        N/A
   0.00        (0.02)       1.00    2.58      25,935    0.33+        5.44+       N/A
   0.00        (0.06)       1.00    5.67       7,741    0.40         5.53        N/A
   0.00        (0.02)       1.00    2.24       8,431    0.60+        4.34+       N/A
   0.00        (0.05)       1.00    4.93       9,273    0.60         4.44        N/A
   0.00        (0.05)       1.00    5.12         749    0.60         5.04        N/A
   0.00        (0.05)       1.00    4.94          12    0.66         4.83        N/A
   0.00        (0.02)       1.00    2.47          10    0.61+        5.95+       N/A
   0.00        (0.05)       1.00    4.21          10    0.68+        5.94+       N/A
 $ 0.00       $(0.28)     $ 9.96    2.12% $  487,849    0.45%+       5.59%+       21%
   0.00        (0.58)      10.03    5.63     495,752    0.45         5.66         47
   0.00        (0.62)      10.06    7.06     172,846    0.45         6.12         48
   0.00        (0.61)      10.00    7.12     156,515    0.47         6.12         77
   0.00        (0.68)       9.92    8.49     101,797    0.58         6.86        215
   0.00        (0.56)       9.79    4.46      90,114    0.50         5.67         79
   0.00        (0.27)       9.96    1.99       5,712    0.70+        5.35+        21
   0.00        (0.55)      10.03    5.39       3,769    0.70         5.37         47
   0.00        (0.60)      10.06    6.80       5,147    0.70         5.86         48
   0.00        (0.58)      10.00    6.86       4,513    0.72         5.87         77
   0.00        (0.10)       9.92    0.41       3,999    0.52+        4.44+       215
 $ 0.00       $(0.31)     $ 9.90    1.11% $4,067,967    0.43%+       6.20%+       52%
   0.00        (0.71)      10.10    6.35   3,367,438    0.43         6.36        245
   0.00        (0.68)      10.18    9.00   2,759,531    0.43         6.39        309
   0.00        (0.64)       9.98    6.97   2,797,001    0.43         6.46        240
   0.00        (0.68)       9.95    9.13   2,677,574    0.42         6.88        209
  (0.09)       (0.63)       9.76    3.60   2,332,032    0.41         6.46         77
   0.00        (0.30)       9.90    0.98%    120,300    0.68+        5.93+        52
   0.00        (0.68)      10.10    6.09     128,212    0.68         6.09        245
   0.00        (0.65)      10.18    8.73      46,186    0.68         6.16        309
   0.00        (0.62)       9.98    6.71      23,564    0.68         6.21        240
   0.00        (0.65)       9.95    8.83       2,536    0.69         6.73        209
  (0.02)       (0.16)       9.76    2.53         771    0.66+        6.93+        77
</TABLE>
- -------
+ Annualized.
                                                                   Prospectus
                                                                              84
<PAGE>

            Financial Highlights (continued)

<TABLE>
<CAPTION>
                         Net Asset              Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value      Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning Investment  Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   Income     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Low Duration II
 Institutional Class
 09/30/1999(b)            $ 9.95     $0.28(a)      $(0.19)(a)    $ 0.09      $(0.28)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.00      0.58(a)        0.00 (a)      0.58       (0.58)       0.00          0.00         (0.05)
 03/31/1998                 9.81      0.22(a)        0.59 (a)      0.81       (0.56)      (0.04)        (0.02)         0.00
 03/31/1997                 9.82      0.62          (0.03)         0.59       (0.58)      (0.02)         0.00          0.00
 03/31/1996                 9.77      0.66           0.04          0.70       (0.60)      (0.03)         0.00          0.00
 03/31/1995                 9.94      0.62          (0.16)         0.46       (0.58)      (0.03)         0.00          0.00
 Administrative Class
 09/30/1999(b)              9.95      0.28(a)       (0.20)(a)      0.08       (0.27)       0.00          0.00          0.00
 03/31/1999                10.00      0.56(a)        0.00 (a)      0.56       (0.56)       0.00          0.00         (0.05)
 02/02/1998 - 03/31/1998   10.03      0.14(a)       (0.08)(a)      0.06       (0.08)      (0.01)         0.00          0.00
Low Duration III
 Institutional Class
 09/30/1999(b)            $ 9.98     $0.30(a)      $(0.17)(a)    $ 0.13      $(0.30)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.05      0.60(a)        0.00 (a)      0.60       (0.60)       0.00          0.00         (0.07)
 03/31/1998                 9.91      0.53(a)        0.24 (a)      0.77       (0.60)       0.00         (0.03)         0.00
 12/31/1996 - 03/31/1997   10.00      0.15          (0.09)         0.06       (0.15)       0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)              9.98      0.30          (0.19)         0.11       (0.28)       0.00          0.00          0.00
 03/19/1999 - 03/31/1999    9.97      0.02           0.01          0.03       (0.02)       0.00          0.00          0.00
Low Duration Mortgage
 Institutional Class
 09/30/1999(b)            $10.01     $0.31(a)      $(0.09)(a)    $ 0.22      $(0.31)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.13      0.64(a)       (0.08)(a)      0.56       (0.64)       0.00          0.00         (0.04)
 07/31/1997 - 03/31/1998   10.00      0.43(a)        0.14 (a)      0.57       (0.42)       0.00         (0.02)         0.00
Moderate Duration
 Institutional Class
 09/30/1999(b)            $ 9.94     $0.28(a)      $(0.26)(a)    $ 0.02      $(0.29)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.14      0.60(a)        0.07 (a)      0.67       (0.60)       0.00         (0.11)        (0.16)
 03/31/1998                 9.83      0.38(a)        0.56 (a)      0.94       (0.60)       0.00         (0.03)         0.00
 12/31/1996 - 03/31/1997   10.00      0.15          (0.17)        (0.02)      (0.15)       0.00          0.00          0.00
Real Return Bond
 Institutional Class
 09/30/1999(b)            $ 9.83     $0.36(a)      $(0.03)(a)    $ 0.33      $(0.34)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                 9.77      0.51(a)        0.10 (a)      0.61       (0.48)      (0.07)         0.00          0.00
 03/31/1998                 9.93      0.44(a)        0.05 (a)      0.49       (0.48)      (0.03)        (0.14)         0.00
 01/29/1997 - 03/31/1997    9.92      0.11          (0.02)         0.09       (0.08)       0.00          0.00          0.00
Total Return
 Institutional Class
 09/30/1999(b)            $10.36     $0.31(a)      $(0.30)(a)    $ 0.01      $(0.31)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.62      0.63(a)        0.16 (a)      0.79       (0.63)       0.00         (0.24)        (0.18)
 03/31/1998                10.27      0.64(a)        0.62 (a)      1.26       (0.62)      (0.02)        (0.27)         0.00
 03/31/1997                10.29      0.68          (0.02)         0.66       (0.66)      (0.02)         0.00          0.00
 03/31/1996                10.02      0.81           0.29          1.10       (0.61)      (0.10)        (0.12)         0.00
 03/31/1995                10.25      0.64          (0.24)         0.40       (0.56)      (0.05)         0.00          0.00
 Administrative Class
 09/30/1999(b)             10.36      0.29(a)       (0.30)(a)     (0.01)      (0.29)       0.00          0.00          0.00
 03/31/1999                10.62      0.61(a)        0.16 (a)      0.77       (0.61)       0.00         (0.24)        (0.18)
 03/31/1998                10.27      0.61(a)        0.63 (a)      1.24       (0.60)      (0.02)        (0.27)         0.00
 03/31/1997                10.29      0.66(a)       (0.02)(a)      0.64       (0.64)      (0.02)         0.00          0.00
 03/31/1996                10.01      0.80           0.29          1.09       (0.60)      (0.09)        (0.12)         0.00
 09/07/1994 - 03/31/1995   10.00      0.31           0.06          0.37       (0.32)      (0.03)         0.00          0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
    period.
(b)  Unaudited
  PIMCO Funds: Pacific Investment Management Series
85
<PAGE>



<TABLE>
<CAPTION>
                                                                       Ratio of Net
Tax Basis                Net Asset          Net Assets   Ratio of       Investment
 Return                    Value                End     Expenses to     Income to   Portfolio
   of          Total        End    Total     of Period    Average        Average    Turnover
 Capital   Distributions of Period Return     (000's)   Net Assets      Net Assets    Rate
- ---------------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>      <C>         <C>            <C>          <C>
 $ 0.00       $(0.28)     $ 9.76    0.97 %  $   467,105    0.62%+(e)       5.77%+       59%
   0.00        (0.63)       9.95    5.89        414,463    0.57   (c)      5.79        322
   0.00        (0.62)      10.00    8.29        401,204    0.50            5.98        335
   0.00        (0.60)       9.81    6.33        339,375    0.51            6.31        237
  (0.02)       (0.65)       9.82    7.30        253,299    0.48            6.61        225
  (0.02)       (0.63)       9.77    4.80        170,866    0.47            6.35        102
   0.00        (0.27)       9.76    0.83            303    0.88+  (f)      5.69+        59
   0.00        (0.61)       9.95    5.63         22,594    0.85   (d)      5.47        322
   0.00        (0.09)      10.00    0.58             56    0.75+           8.53+       335
 $ 0.00       $(0.30)     $ 9.81    1.30 %  $    25,485    0.57%+(g)       6.01%+       53%
   0.00        (0.67)       9.98    6.10         26,549    0.50            5.94        167
   0.00        (0.63)      10.05    7.93         23,896    0.50            5.98        307
   0.00        (0.15)       9.91    0.58         10,056    0.49+           6.00+       155
   0.00        (0.28)       9.81    1.17             10    0.81+  (h)      2.84+        53
   0.00        (0.02)       9.98    0.15              6    0.75            6.42        167
 $ 0.00       $(0.31)     $ 9.92    2.26 %  $     4,178    1.73%+(e)       6.27%       115%
   0.00        (0.68)      10.01    5.71          4,119    2.37   (e)      6.35        198
   0.00        (0.44)      10.13    5.86          3,748    1.81+  (f)      6.30+       486
 $ 0.00       $(0.29)     $ 9.67    0.26 %  $   345,033    0.45%+          6.01%+       70%
   0.00        (0.87)       9.94    6.70        317,400    0.45            5.94        169
   0.00        (0.63)      10.14    9.80        239,152    0.45            3.75         96
   0.00        (0.15)       9.83   (0.25)        13,458    0.44+           6.01+        49
 $ 0.00       $(0.34)     $ 9.82    3.40 %  $    86,100    0.54%+          7.28%+      103%
   0.00        (0.55)       9.83    6.41         15,588    0.52            5.18        438
   0.00        (0.65)       9.77    4.70          5,526    0.52            4.46        967
   0.00        (0.08)       9.93    0.09          5,638    0.51+           6.54+       160
 $ 0.00       $(0.31)     $10.06    0.07 %  $23,305,606    0.46%+          6.00%+       46%
   0.00        (1.05)      10.36    7.60     21,711,396    0.43            5.91        154
   0.00        (0.91)      10.62   12.63     16,484,119    0.43            6.06        206
   0.00        (0.68)      10.27    6.60     12,528,536    0.43            6.60        173
   0.00        (0.83)      10.29   11.14     10,247,605    0.42            6.85        221
  (0.02)       (0.63)      10.02    4.22      7,239,735    0.41            6.72         98
   0.00        (0.29)      10.06   (0.06)     2,873,555    0.71+           5.73+        46
   0.00        (1.03)      10.36    7.33      1,972,984    0.68            5.52        154
   0.00        (0.89)      10.62   12.36        481,730    0.68            5.74        206
   0.00        (0.66)      10.27    6.34        151,194    0.68            6.35        173
   0.00        (0.81)      10.29   10.99        104,618    0.68            6.64        221
  (0.01)       (0.36)      10.01    3.76          9,037    0.66+           6.54+        98
</TABLE>
- -------
+ Annualized.
(c) Ratio of expenses to average net assets excluding interest expense on
    reverse repurchase agreement is 0.50%.
(d) Ratio of expenses to average net assets excluding interest expense on
    reverse repurchase agreement is 0.75%.
(e) Ratio of expenses to net assets excluding interest expense is 0.50%.
(f) Ratio of expenses to net assets excluding interest expense is 0.75%.
(g) Ratio of expenses to average net assets excluding interest expense is
    0.50%.
(h) Ratio of expenses to average net assets excluding interest expense is
    0.76%.
                                                                   Prospectus
                                                                              86
<PAGE>

            Financial Highlights (continued)

<TABLE>
<CAPTION>
                         Net Asset              Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value      Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning Investment  Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   Income     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Total Return II
 Institutional Class
 09/30/1999(b)            $10.11     $0.28(a)      $ 0.33 (a)    $(0.05)     $(0.28)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.26      0.59(a)        0.17 (a)      0.76       (0.59)       0.00         (0.18)        (0.14)
 03/31/1998                 9.85      0.63(a)        0.52 (a)      1.15       (0.60)      (0.03)        (0.11)         0.00
 03/31/1997                 9.89      0.61          (0.02)         0.59       (0.62)      (0.01)         0.00          0.00
 11/01/1995 - 03/31/1996   10.21      0.25          (0.17)         0.08       (0.26)       0.00         (0.09)        (0.05)
 10/31/1995(a)              9.39      0.69           0.76          1.45       (0.62)       0.00         (0.01)         0.00
 Administrative Class
 09/30/1999(b)             10.11      0.28(a)       (0.34)(a)     (0.06)      (0.27)       0.00          0.00          0.00
 03/31/1999                10.26      0.56(a)        0.17 (a)      0.73       (0.56)       0.00         (0.18)        (0.14)
 03/31/1998                 9.85      0.60(a)        0.52 (a)      1.12       (0.57)      (0.03)        (0.11)         0.00
 03/31/1997                 9.89      0.59          (0.02)         0.57       (0.60)      (0.01)         0.00          0.00
 11/01/1995 - 03/31/1996   10.22      0.24          (0.17)         0.07       (0.26)       0.00         (0.09)        (0.05)
 11/30/1994 -
  10/31/1995(a)             9.34      0.56           0.88          1.44       (0.55)       0.00         (0.01)         0.00
Total Return III
 Institutional Class
 09/30/1999(b)            $ 9.27     $0.28(a)      $(0.34)(a)    $(0.06)     $(0.27)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                 9.55      0.57(a)        0.20 (a)      0.77       (0.56)       0.00         (0.24)        (0.25)
 03/31/1998                 9.15      0.57(a)        0.56 (a)      1.13       (0.54)      (0.03)        (0.16)         0.00
 03/31/1997                 9.13      0.55           0.05          0.60       (0.55)      (0.02)         0.00         (0.01)
 03/31/1996                 8.99      0.72           0.17          0.89       (0.54)      (0.09)        (0.12)         0.00
 03/31/1995                 9.18      0.59          (0.16)         0.43       (0.52)      (0.02)         0.00          0.00
 Administrative Class
 09/30/1999(b)              9.27      0.28(a)       (0.35)(a)     (0.07)      (0.26)       0.00          0.00          0.00
 03/31/1999                 9.55      0.55(a)        0.20 (a)      0.75       (0.54)       0.00         (0.24)        (0.25)
 04/11/1997 - 03/31/1998    9.12      0.54(a)        0.58 (a)      1.12       (0.50)      (0.03)        (0.16)         0.00
Total Return Mortgage
 Institutional Class
 09/30/1999(b)            $10.19     $0.29(a)      $(0.21)(a)    $ 0.08      $(0.29)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.24      0.58(a)        0.05 (a)      0.63       (0.58)       0.00         (0.03)        (0.07)
 07/31/1997 - 03/31/1998   10.00      0.41(a)        0.30 (a)      0.71       (0.46)       0.00         (0.01)         0.00
High Yield
 Institutional Class
 09/30/1999(b)            $11.23     $0.46(a)      $(0.49)(a)    $(0.03)     $(0.47)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                11.66      0.95(a)       (0.43)(a)      0.52       (0.94)      (0.01)         0.00          0.00
 03/31/1998                11.10      0.98(a)        0.65 (a)      1.63       (0.98)       0.00          0.00         (0.09)
 03/31/1997                10.94      0.92           0.34          1.26       (0.97)       0.00         (0.13)         0.00
 03/31/1996                10.42      1.04           0.54          1.58       (1.01)       0.00         (0.05)         0.00
 03/31/1995                10.52      0.99          (0.12)         0.87       (0.93)      (0.02)         0.00         (0.02)
 Administrative Class
 09/30/1999(b)             11.23      0.45(a)       (0.50)(a)     (0.05)      (0.45)       0.00          0.00          0.00
 03/31/1999                11.66      0.93(a)       (0.43)(a)      0.50       (0.92)      (0.01)         0.00          0.00
 03/31/1998                11.10      0.95(a)        0.65 (a)      1.60       (0.95)       0.00          0.00         (0.09)
 03/31/1997                10.94      0.85(a)        0.38 (a)      1.23       (0.94)       0.00         (0.13)         0.00
 03/31/1996                10.41      1.02(a)        0.54 (a)      1.56       (0.98)       0.00         (0.05)         0.00
 01/16/1995 - 03/31/1995   10.14      0.23           0.25          0.48       (0.21)       0.00          0.00          0.00
Long-Term U.S. Gov't
 Institutional Class
 09/30/1999(b)            $10.30     $0.32(a)      $(0.62)(a)    $(0.30)     $(0.31)     $ 0.00        $ 0.00        $ 0.00
 03/31/1999                10.57      0.63(a)        0.20 (a)      0.83       (0.64)       0.00          0.00         (0.46)
 03/31/1998                 9.39      0.52(a)        1.34 (a)      1.86       (0.62)       0.00         (0.06)         0.00
 03/31/1997                 9.96      0.79          (0.35)         0.44       (0.68)       0.00          0.00         (0.33)
 03/31/1996                 9.85      0.83           0.66          1.49       (0.68)      (0.04)        (0.50)        (0.16)
 03/31/1995                 9.96      0.60          (0.09)         0.51       (0.60)      (0.02)         0.00          0.00
 Administrative Class
 09/30/1999(b)             10.30      0.28(a)       (0.59)(a)     (0.30)      (0.31)       0.00          0.00          0.00
 03/31/1999                10.57      0.60(a)        0.20 (a)      0.80       (0.61)       0.00          0.00         (0.46)
 09/23/1997 - 03/31/1998   10.17      0.26(a)        0.51 (a)      0.77       (0.31)       0.00         (0.06)         0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
    period.
(b) Unaudited
  PIMCO Funds: Pacific Investment Management Series
87
<PAGE>



<TABLE>
<CAPTION>
                                                                      Ratio of Net
Tax Basis                Net Asset          Net Assets  Ratio of       Investment
 Return                    Value               End     Expenses to     Income to   Portfolio
   of          Total        End    Total    of Period    Average        Average    Turnover
 Capital   Distributions of Period Return     (000's)  Net Assets      Net Assets    Rate
- --------------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>      <C>        <C>            <C>          <C>
 $ 0.00       $(0.28)     $ 9.78   (0.49)%  $1,150,127    0.50%+          5.65%+       53%
   0.00        (0.91)      10.11    7.46       986,690    0.50            5.65        213
   0.00        (0.74)      10.26   11.99       574,587    0.50            6.15        361
   0.00        (0.63)       9.85    6.15       478,451    0.50            6.38        293
   0.00        (0.40)       9.89    0.78       455,583    0.51+           6.36+        73
   0.00        (0.63)      10.21   15.96       442,091    0.50            6.47         41
   0.00        (0.27)       9.78   (0.61)       50,434    0.75+           5.27+        53
   0.00        (0.88)      10.11    7.19        54,736    0.75            5.33        213
   0.00        (0.71)      10.26   11.71        15,172    0.75            5.86        361
   0.00        (0.61)       9.85    5.88         5,304    0.75            6.13        293
   0.00        (0.40)       9.89    0.57         3,320    0.76+           6.06+        73
   0.00        (0.56)      10.22   15.92         3,163    0.76+           6.22+        41
 $ 0.00       $(0.27)     $ 8.94   (0.60)%  $  617,808    0.51%+          6.00%+       56%
   0.00        (1.05)       9.27    8.20       488,243    0.50            5.85        216
   0.00        (0.73)       9.55   12.62       365,249    0.51            5.99        183
   0.00        (0.58)       9.15    6.76       193,297    0.51            6.21         90
   0.00        (0.75)       9.13   10.06       142,223    0.50            6.82        177
  (0.08)       (0.62)       8.99    4.92        99,497    0.50            6.95        146
   0.00        (0.26)       8.94   (0.73)        3,270    0.76+           5.78+        56
   0.00        (1.03)       9.27    7.93         1,867    0.75            5.59        216
   0.00        (0.69)       9.55   12.46           178    0.76+           5.85+       183
 $ 0.00       $(0.29)     $ 9.98    0.85 %  $    3,901    0.51%+          5.83%+      190%
   0.00        (0.68)      10.19    6.27         4,128    0.50            5.66        158
   0.00        (0.47)      10.24    6.69         3,588    0.52+           6.07+       593
 $ 0.00       $(0.47)     $10.73   (0.32)%  $2,320,018    0.50%+          8.45%+       17%
   0.00        (0.95)      11.23    4.73     2,162,868    0.50            8.41         39
   0.00        (1.07)      11.66   15.26     1,628,930    0.50            8.52         37
   0.00        (1.10)      11.10   12.04       744,498    0.50            8.77         67
   0.00        (1.06)      10.94   15.70       536,983    0.47            9.28         66
   0.00        (0.97)      10.42    8.81       336,310    0.48            9.37         78
   0.00        (0.45)      10.73   (0.44)      320,987    0.75+           8.17+        17
   0.00        (0.93)      11.23    4.49       238,792    0.75            8.17         39
   0.00        (1.04)      11.66   14.98        69,937    0.75            8.21         37
   0.00        (1.07)      11.10   11.76        10,428    0.76            8.48         67
   0.00        (1.03)      10.94   15.54         1,007    0.80            9.16         66
   0.00        (0.21)      10.41    4.66            41    0.73+          10.12+        78
 $ 0.00       $(0.31)     $ 9.69   (2.88)%  $  281,120    0.55%+(c)       6.34%+      167%
   0.00        (1.10)      10.30    7.76       170,847    0.89(d)         5.83        364
   0.00        (0.68)      10.57   20.23        48,547    0.51            4.88        177
   0.00        (1.01)       9.39    4.48        19,995    0.63            7.63        402
   0.00        (1.38)       9.96   14.83        32,511    0.56            6.80        238
   0.00        (0.62)       9.85    5.50        32,349    0.50            6.62         89
   0.00        (0.30)       9.69   (2.99)       44,170    0.80+  (e)      5.55+       167
   0.00        (1.07)      10.30    7.46        11,383    1.15   (f)      5.58        364
   0.00        (0.37)      10.57    7.60         4,957     .76+           4.87+       177
</TABLE>
- -------
+ Annualized.
(c)Ratio of expenses to average net assets excluding interest expense is 0.50%.
(d) Ratio of expenses to average net assets excluding interest expense on
    reverse repurchase agreement is 0.50%.
(e) Ratio of expenses to average net assets excluding interest expense is
    0.75%.
(f) Ratio of expenses to average net assets excluding interest expense on
    reverse repurchase agreement is 0.76%.
                                                                   Prospectus
                                                                              88
<PAGE>

            Financial Highlights (continued)

<TABLE>
<CAPTION>
                         Net Asset              Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value      Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning Investment  Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   Income     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Short Duration Municipal Income
Fund
 Institutional Class
 08/31/1999 -
  09/30/1999(b)           $10.00     $0.03         $ 0.00        $ 0.03      $(0.03)     $ 0.00        $ 0.00         $0.00
Municipal Bond
 Institutional Class
 09/30/1999(b)            $10.12     $0.23(a)      $(0.56)(a)    $(0.33)     $(0.23)     $ 0.00        $ 0.00         $0.00
 03/31/1999                 9.97      0.45(a)        0.14 (a)      0.59       (0.44)       0.00          0.00          0.00
 12/31/1997 - 03/31/1998   10.00      0.11(a)       (0.03)(a)      0.08       (0.11)       0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)             10.12      0.21          (0.55)        (0.34)      (0.22)       0.00          0.00          0.00
 09/30/98 - 03/31/1999     10.25      0.21          (0.13)         0.08       (0.21)       0.00          0.00          0.00
California Intermediate Municipal
Bond Fund
 Institutional Class
 08/31/1999 -
  09/30/1999(b)           $10.00     $0.03         $ 0.04        $ 0.07      $(0.03)     $ 0.00        $ 0.00         $0.00
 Administrative Class
 09/07/1999 -
  09/30/1999(b)            10.02      0.02           0.02          0.04       (0.02)       0.00          0.00          0.00
New York Intermediate Municipal
Bond Fund
 Institutional Class
 08/31/1999 -
 09/30/1999(b)            $10.00     $0.03         $ 0.01        $ 0.04      $(0.03)     $ 0.00        $ 0.00         $0.00
Global Bond
 Institutional Class
 09/30/1999(b)            $ 9.76     $0.27(a)      $(0.34)(a)    $(0.07)     $(0.28)     $ 0.00        $ 0.00         $0.00
 03/31/1999                 9.70      0.52(a)        0.14 (a)      0.66       (0.36)      (0.16)        (0.08)         0.00
 03/31/1998                 9.86      0.66(a)       (0.10)(a)      0.56       (0.53)       0.00          0.00         (0.19)
 03/31/1997                10.05      0.70          (0.01)         0.69       (0.44)       0.00         (0.44)         0.00
 03/31/1996                 9.87      0.45           0.72          1.17       (0.61)       0.00         (0.21)        (0.17)
 03/31/1995                 9.85      0.69          (0.14)         0.55       (0.29)      (0.24)         0.00          0.00
 Administrative Class
 09/30/1999(b)              9.76      0.27(a)       (0.35)(a)     (0.08)      (0.27)       0.00          0.00          0.00
 03/31/1999                 9.70      0.51(a)        0.14 (a)      0.65       (0.35)      (0.16)        (0.08)         0.00
 03/31/1998                 9.86      0.59(a)       (0.05)(a)      0.54       (0.51)       0.00          0.00         (0.19)
 08/01/1996 - 03/31/1997   10.28      0.51          (0.23)         0.28       (0.26)       0.00         (0.44)         0.00
Global Bond II
 Institutional Class
 09/30/1999(b)            $ 9.89     $0.27(a)      $(0.35)(a)    $(0.08)     $(0.27)     $ 0.00        $(0.09)        $0.00
 03/31/1999                 9.92      0.52(a)        0.06 (a)      0.58       (0.52)       0.00         (0.01)        (0.08)
 02/25/1998 - 03/31/1998    9.82      0.06(a)        0.09 (a)      0.15        0.00       (0.05)         0.00          0.00
Foreign Bond
 Institutional Class
 09/30/1999(b)            $10.63     $0.32(a)      $(0.49)(a)    $(0.17)     $(0.32)     $ 0.00        $ 0.00         $0.00
 03/31/1999                10.74      0.58(a)        0.24 (a)      0.82       (0.58)       0.00         (0.10)        (0.25)
 03/31/1998                10.41      0.66(a)        0.61 (a)      1.27       (0.63)       0.00         (0.31)         0.00
 03/31/1997                10.50      0.80           1.00          1.80       (0.40)       0.00         (1.49)         0.00
 03/31/1996                 9.38      0.96           1.03          1.99       (0.34)      (0.25)        (0.25)        (0.03)
 03/31/1995                10.18      0.38          (0.57)        (0.19)       0.00        0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)             10.63      0.31(a)       (0.49)(a)     (0.18)      (0.31)       0.00          0.00          0.00
 03/31/1999                10.74      0.56(a)        0.24 (a)      0.80       (0.56)       0.00         (0.10)        (0.25)
 03/31/1998                10.41      0.63(a)        0.61 (a)      1.24       (0.60)       0.00         (0.31)         0.00
 01/28/1997 - 03/31/1997   10.54      0.59          (0.67)        (0.08)      (0.05)       0.00          0.00          0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
    period.
(b) Unaudited.
  PIMCO Funds: Pacific Investment Management Series
89
<PAGE>



<TABLE>
<CAPTION>
                                                                     Ratio of Net
Tax Basis                Net Asset          Net Assets  Ratio of      Investment
 Return                    Value               End     Expenses to    Income to   Portfolio
   of          Total        End    Total    of Period    Average       Average    Turnover
 Capital   Distributions of Period Return     (000's)  Net Assets     Net Assets    Rate
- -------------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>      <C>        <C>           <C>          <C>
 $ 0.00       $(0.03)     $10.00    0.30%    $ 10,536     0.39%+         3.60%+      104%
 $ 0.00       $(0.23)     $ 9.56   (3.31)%   $  4,325     0.52%+         4.60%+       48%
   0.00        (0.44)      10.12    6.04        5,894     0.50           4.41         70
   0.00        (0.11)       9.97    0.78        3,023     0.50+          4.46+        60
   0.00        (0.22)       9.56   (3.43)       2,477     0.77+          2.22+        48
   0.00        (0.21)      10.12    0.83        1,419     0.75+          2.11         70
 $ 0.00       $(0.03)     $10.04    0.71 %   $  3,123     0.49%+         3.83%+      181%
   0.00        (0.02)      10.04    0.63           10     0.49+          2.95+       181
 $ 0.00       $(0.03)     $10.01    0.39 %   $  3,010     0.49%+         3.69%+      193%
 $ 0.00       $(0.28)     $ 9.41   (0.56)%   $283,268     0.62%+(c)      5.96%+       39%
   0.00        (0.60)       9.76    6.90      266,984     0.55           5.35        143
   0.00        (0.72)       9.70    5.85      256,274     0.55           6.64        389
   0.00        (0.88)       9.86    6.78      215,631     0.56           7.51        911
   0.00        (0.99)      10.05   12.04      133,833     0.58           5.88       1083
   0.00        (0.53)       9.87   10.35       76,476     0.64           5.59        461
   0.00        (0.27)       9.41   (0.68)       7,065     0.87+ (d)      5.80+        39
   0.00        (0.59)       9.76    6.78        1,326     0.80           5.21        143
   0.00        (0.70)       9.70    5.57        1,548     0.80           6.39        389
   0.00        (0.70)       9.86    2.97          346     0.78+          5.66+       911
 $ 0.00       $(0.36)     $ 9.45   (1.69)%   $ 29,033     0.58%+         2.84%+       55%
   0.00        (0.61)       9.89    6.06       29,044     0.55           5.29        236
   0.00        (0.05)       9.92    1.02       24,517     0.55+          6.24+       369
 $ 0.00       $(0.32)     $10.14   (1.63)%   $461,433     0.59%+(e)      6.16%+       90%
   0.00        (0.93)      10.63    7.92      530,325     0.50           5.39        376
   0.00        (0.94)      10.74   12.64      392,198     0.50           6.32        280
   0.00        (1.89)      10.41   17.69      234,880     0.50           7.88        984
   0.00        (0.87)      10.50   21.80      258,493     0.52           5.83       1234
  (0.61)       (0.61)       9.38   (1.85)     232,700     0.47           6.44        299
   0.00        (0.31)      10.14   (1.75)       4,906     0.85+ (f)      5.97+        90
   0.00        (0.91)      10.63    7.65        2,096     0.75           5.13        376
   0.00        (0.91)      10.74   12.34          315     0.75           6.07        280
   0.00        (0.05)      10.41   (0.72)          30     0.79+          7.63+       984
</TABLE>
- -------
+ Annualized.
(c)Ratio of expenses to average net assets excluding interest expense is 0.55%.
(d)Ratio of expenses to average net assets excluding interest expense is 0.80%.
(e) Ratio of expenses to average net assets excluding interest expense on
    agreement is 0.50%.
(f) Ratio of expenses to average net assets excluding interest expense is
    0.75%.
                                                                   Prospectus
                                                                              90
<PAGE>

            Financial Highlights (continued)

<TABLE>
<CAPTION>
                         Net Asset              Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value      Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning Investment  Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   Income     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Emerging Markets Bond
 Institutional Class
 09/30/1999(b)            $ 7.51     $ 0.45(a)     $ 0.17 (a)    $0.62       $(0.45)      $0.00        $ 0.00        $ 0.00
 03/31/1999                 9.67       0.87(a)      (2.11)(a)    (1.24)       (0.87)       0.00          0.00         (0.05)
 07/31/1997 - 03/31/1998   10.00       0.46(a)      (0.18)(a)     0.28        (0.46)       0.00         (0.15)         0.00
 Administrative Class
 09/30/1999(b)              7.51       0.45          0.16         0.61        (0.44)       0.00          0.00          0.00
 09/30/98 - 03/31/1999      6.82       0.45          0.74         1.19        (0.45)       0.00          0.00         (0.05)
Strategic Balanced
 Institutional Class
 09/30/1999(b)            $12.76     $ 0.33(a)     $(0.26)(a)    $0.07       $(0.23)      $0.00        $ 0.00        $ 0.00
 03/31/1999                12.60       0.89(a)       0.60 (a)     1.49        (0.66)       0.00         (0.67)         0.00
 03/31/1998                10.32       1.30(a)       2.05 (a)     3.35        (0.84)       0.00         (0.23)         0.00
 06/28/1996 - 03/31/1997   10.00       0.85          0.31         1.16        (0.63)       0.00         (0.21)         0.00
 Administrative Class
 06/30/99 -
  09/30/1999(b)            13.17       0.69         (0.56)       (0.47)       (0.11)       0.00          0.00          0.00
Convertible Fund
 Institutional Class
 09/30/1999(b)            $10.00     $(0.05)       $ 1.42        $1.37       $ 0.00       $0.00        $ 0.00        $ 0.00
StocksPLUS
 Institutional Class
 09/30/1999(b)            $14.32     $ 0.32(a)     $(0.20)(a)    $0.12       $(0.25)      $0.00        $ 0.00        $ 0.00
 03/31/1999                14.09       0.97(a)       1.32 (a)     2.29        (0.82)       0.00         (1.24)         0.00
 03/31/1998                11.46       1.90(a)       3.23 (a)     5.13        (1.41)       0.00         (1.09)         0.00
 03/31/1997                11.16       1.27          0.82         2.09        (1.27)       0.00         (0.52)         0.00
 03/31/1996                10.48       0.91          2.48         3.39        (1.05)       0.00         (1.62)        (0.04)
 03/31/1995                 9.52       1.03          0.69         1.72        (0.76)       0.00          0.00          0.00
 Administrative Class
 09/30/1999(b)             14.25       0.27(a)      (0.20)(a)     0.07        (0.24)       0.00          0.00          0.00
 03/31/1999                14.06       1.10(a)       1.13 (a)     2.23        (0.80)       0.00         (1.24)         0.00
 03/31/1998                11.46       1.89(a)       3.19 (a)     5.08        (1.39)       0.00         (1.09)         0.00
 01/07/1997 - 03/31/1997   11.56       0.14         (0.09)        0.05        (0.15)       0.00          0.00          0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
    period.
(b) Unaudited.

  PIMCO Funds: Pacific Investment Management Series
91
<PAGE>



<TABLE>
<CAPTION>
                                                                     Ratio of Net
Tax Basis                Net Asset          Net Assets  Ratio of      Investment
 Return                    Value               End     Expenses to    Income to   Portfolio
   of          Total        End    Total    of Period    Average       Average    Turnover
 Capital   Distributions of Period Return     (000's)  Net Assets     Net Assets    Rate
- -------------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>      <C>        <C>           <C>          <C>
  $0.00       $(0.45)     $ 7.68     8.45 %  $  4,478     0.90%+(c)     11.66%+      188%
   0.00        (0.92)       7.51   (12.55)      3,641     0.85          11.08        315
   0.00        (0.61)       9.67     3.10       3,676     0.86+          7.21+       695
   0.00        (0.44)       7.68     8.30      11,563     1.13+          5.73+       188
   0.00        (0.50)       7.51    17.88         118     1.10           6.24        315
  $0.00       $(0.23)     $12.60     0.51 %  $125,686     0.65%+         4.96%+       34%
   0.00        (1.33)      12.76    12.36      97,945     0.65           7.00         82
   0.00        (1.07)      12.60    33.40      38,806     0.65          10.84         56
   0.00        (0.84)      10.32    11.83      10,360     0.90+          9.72+        95
   0.00        (0.11)      12.59    (3.58)        248     0.90+          2.71+        34
  $0.00       $ 0.00      $11.37    13.70 %  $ 36,145     0.70%+(d)     (0.81)%+     205%
  $0.00       $(0.25)     $14.19     0.83 %  $546,622     0.66%+         4.30%+       46%
   0.00        (2.06)      14.32    17.65     512,953     0.65           6.92         81
   0.00        (2.50)      14.09    47.75     416,600     0.65          13.74         30
   0.00        (1.79)      11.46    19.44     235,829     0.65          11.78         47
   0.00        (2.71)      11.16    34.07     151,869     0.70          15.23        102
   0.00        (0.76)      10.48    18.64      46,498     0.50          11.89        177
   0.00        (0.24)      14.08     0.49      51,992     0.91+          1.77+        46
   0.00        (2.04)      14.25    17.21      11,302     0.90           7.83         81
   0.00        (2.48)      14.06    47.19       2,143     0.90          13.49         30
   0.00        (0.15)      11.46     0.34         682     0.95+          4.83+        47
</TABLE>
- -------
+ Annualized.
(c) Ratio of expenses to average net assets excluding interest expense is
    0.85%.
(d) Ratio of expenses to average net assets excluding interest expense is
    0.65%.

                                                                   Prospectus
                                                                              92
<PAGE>

            Appendix A
            Description of Securities Ratings

            A Fund's investments may range in quality from securities rated in
            the lowest category in which the Fund is 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 Fund'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 ("Junk Bonds") 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     Corporate and Municipal Bond Ratings
Investors
Service,     Aaa: Bonds which are rated Aaa are judged to be of the best
Inc.        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.


PIMCO Funds: Pacific Investment Management Series

A-1
<PAGE>


             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.

             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
            indicates a mid-range ranking; and the modifier 3 indicates that
            the issue ranks in the lower end of its generic rating category.

Corporate   Moody's short-term debt ratings are opinions of the ability of
Short-      issuers to repay punctually senior debt obligations which have an
Term Debt   original maturity not exceeding one year. Obligations relying upon
Ratings     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.

Short-      There are four rating categories for short-term municipal bonds
Term        that define an investment grade situation, which are listed below.
Municipal   In the case of variable rate demand obligations (VRDOs), a two-
Bond        component rating is assigned. The first element represents an
Ratings     evaluation of the degree of risk associated with scheduled
            principal and interest payments, and the other represents an
            evaluation of the degree of risk associated with the demand
            feature. The short-term rating assigned to the demand feature of
            VRDOs is designated as VMIG. When either the long- or short-term
            aspect of a VRDO is not rated, that piece is designated NR, e.g.,
            Aaa/NR or NR/VMIG 1. MIG ratings terminate at the retirement of
            the obligation while VMIG rating expiration will be a function of
            each issue's specific structural or credit features.

             MIG 1/VMIG 1: This designation denotes best quality. There is
            present strong protection by established cash flows, superior
            liquidity support or demonstrated broad-based access to the market
            for refinancing.
                                                                   Prospectus
                                                                             A-2
<PAGE>


             MIG 2/VMIG 2: This designation denotes high quality. Margins of
            protection are ample although not so large as in the preceding
            group.

             MIG 3/VMIG 3: This designation denotes favorable quality. All
            security elements are accounted for but there is lacking the
            undeniable strength of the preceding grades. Liquidity and cash
            flow protection may be narrow and market access for refinancing is
            likely to be less well established.

             MIG 4/VMIG 4: This designation denotes adequate quality.
            Protection commonly regarded as required of an investment security
            is present and although not distinctly or predominantly
            speculative, there is specific risk.

             SG: This designation denotes speculative quality. Debt
            instruments in this category lack margins of protection.

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

             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.



PIMCO Funds: Pacific Investment Management Series

A-3
<PAGE>

             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  An S&P commercial paper rating is a current assessment of the
Paper       likelihood of timely payment of debt having an original maturity
Rating      of no more than 365 days. Ratings are graded into several
Definitions 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 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.
                                                                   Prospectus
                                                                             A-4
<PAGE>


             C: This rating is assigned to 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.


PIMCO Funds: Pacific Investment Management Series

A-5
<PAGE>

            -------------------------------------------------------------------
            INVESTMENT ADVISER AND ADMINISTRATOR
PIMCO       PIMCO, 840 Newport Center Drive, Suite 300, Newport Beach, CA
Funds:      92660
Pacific
Investment
Management  -------------------------------------------------------------------
Series      CUSTODIAN
            State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, MO
            64105

            -------------------------------------------------------------------
            TRANSFER AGENT
            National Financial Data Services, 330 W. 9th Street, 4th Floor,
            Kansas City, MO 64105

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

            -------------------------------------------------------------------
            LEGAL COUNSEL
            Dechert Price & Rhoads, 1775 Eye Street N.W., Washington, D.C.
            20006

            -------------------------------------------------------------------
<PAGE>

The Trust's Statement of Additional Information ("SAI") and annual and
semi-annual reports to shareholders include additional information about the
Funds. The SAI and the financial statements included in the Funds' most recent
annual report to shareholders are incorporated by reference into this
Prospectus, which means they are part of this Prospectus for legal purposes. The
Funds' annual report discusses the market conditions and investment strategies
that significantly affected each Funds' performance during its last fiscal
year. You may get free copies of any of these materials, request other
information about a Fund, or make shareholder inquiries by calling the Trust at
1-800-927-4648 or PIMCO Infolink Audio Response Network at 1-800-987-4626, or by
writing to:

PIMCO Funds: Pacific Investment Management Series
840 Newport Center Drive
Suite 300
Newport Beach, CA 92660

You can also visit our Web site at www.pimco.com for additional information
about the Funds.

You may review and copy information about the Trust, including SAI, at the
Securities and Exchange Commission's public reference room in Washington. You
may call the Commission at 1-202-942-8090 for information about the operation of
the reference room. You may also access reports and other information about the
trust on the Commission's Web site at www.sec.gov. You may get copies of this
information, with payment of a duplication fee, by writing Public Reference
Section of the Commission, Washington D.C. 20549-0102, or by electronic request
at [email protected].

PIMCO
- -------
  FUNDS

PIMCO Funds
840 Newport Center Drive
Suite 300
Newport Beach, CA 92660

www.pimco.com

Investment Company Act file no. 811-5028

PY000.3/00
<PAGE>

<TABLE>
<CAPTION>
                          PIMCO Funds Prospectus

<S>                       <C>
                          --------------------------------------------------------------------------------
Pacific                   SHORT DURATION BOND FUNDS                  HIGH YIELD BOND FUNDS
Investment                Money Market Fund                          High Yield Fund
Management                Short-Term Fund
Series                    Low Duration Fund                          INFLATION-INDEXED BOND FUNDS
                                                                     Real Return Bond Fund
                          --------------------------------------------------------------------------------
March 31, 2000            INTERMEDIATE DURATION BOND FUNDS
                          Total Return Fund                          CONVERTIBLE FUNDS
Share Classes                                                        Convertible Fund
A    B     C              --------------------------------------------------------------------------------
                          LONG DURATION BOND FUNDS
                          Long-Term U.S. Government Fund             STOCK AND BOND FUNDS
                                                                     Strategic Balanced Fund
                          --------------------------------------------------------------------------------
                          INTERNATIONAL BOND FUNDS
                          Global Bond Fund II                        ENHANCED INDEX STOCK FUNDS
                          Foreign Bond Fund                          StocksPLUS Fund
                          Emerging Markets Bond Fund
                          --------------------------------------------------------------------------------


                                                                                                 P I M C O
                          This cover is not part of the Prospectus.                              ---------
                                                                                                     FUNDS
</TABLE>
<PAGE>

            PIMCO Funds Prospectus

PIMCO       This Prospectus describes 13 mutual funds offered by PIMCO Funds:
Funds:      Pacific Investment Management Series. The Funds provide access to
Pacific     the professional investment advisory services offered by Pacific
Investment  Investment Management Company ("PIMCO"). As of December 31, 1999,
Management  PIMCO managed approximately $186 billion in assets.
Series

March 31,   This Prospectus explains what you should know about the Funds
2000        before you invest. Please read it carefully.

Share       The Securities and Exchange Commission has not approved or
Classes     disapproved these securities, or determined if this Prospectus is
A, B        truthful or complete. Any representation to the contrary is a
and C       criminal offense.

  Pacific Investment Management Series
1
<PAGE>



            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summaries
           Convertible Fund...............................................   5
           Emerging Markets Bond Fund.....................................   7
           Foreign Bond Fund..............................................   9
           Global Bond Fund II............................................  11
           High Yield Fund................................................  13
           Long-Term U.S. Government Fund.................................  15
           Low Duration Fund..............................................  17
           Money Market Fund..............................................  19
           Real Return Bond Fund..........................................  21
           Short-Term Fund................................................  23
           StocksPLUS Fund................................................  25
           Strategic Balanced Fund........................................  27
           Total Return Fund..............................................  29
         Summary of Principal Risks.......................................  31
         Management of the Funds..........................................  33
         Investment Options...............................................  35
         How Fund Shares are Priced.......................................  38
         How to Buy and Sell Shares.......................................  39
         Fund Distributions...............................................  42
         Tax Consequences.................................................  43
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  44
         Financial Highlights.............................................  51
         Appendix A--Description of Securities Ratings.................... A-1
</TABLE>
                                                                   Prospectus
                                                                               2
<PAGE>

            Summary Information

 The table below compares certain investment characteristics of the Funds.
 Other important characteristics are described in the individual Fund
 Summaries beginning on page 5. Following the table are certain key concepts
 which are used throughout the prospectus.

<TABLE>
<CAPTION>
                                                                                                        Non-U.S. Dollar
                                                                                                        Denominated
                                Main Investments   Duration                  Credit Quality(1)          Securities(2)
 ---------------------------------------------------------------------------------------------------------------------------
 <C>             <C>            <S>                <C>                       <C>                        <C>
 Short Duration  Money Market   Money market       (less than or =)          Min 95% Aaa or             0%
 Bond Funds                     instruments        90 days dollar-           Prime 1; (less than or =)
                                                   weighted average          5% Aa
                                                   maturity                  or Prime 2
            ----------------------------------------------------------------------------------------------------------------
                 Short-Term     Money market       0-1 year                  B to Aaa; max              0-5%(3)
                                instruments and                              10% below Baa
                                short maturity
                                fixed income
                                securities
            ----------------------------------------------------------------------------------------------------------------
                 Low Duration   Short maturity     1-3 years                 B to Aaa; max              0-20%(3)
                                fixed income                                 10% below Baa
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 Intermediate    Total Return   Intermediate       3-6 years                 B to Aaa; max              0-20%(3)
 Duration                       maturity fixed                               10% below Baa
 Bond Funds                     income
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 Long Duration   Long-Term      Long-term          (greater than or =)       A to Aaa                   0%
 Bond Funds      U.S.           maturity fixed     8 years
                 Government     income
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 International   Global Bond II U.S. and hedged    3-7 years                 B to Aaa; max              25-75%(5)
 Bond Funds                     non-U.S.                                     10% below Baa
                                intermediate
                                maturity fixed
                                income
                                securities
            ----------------------------------------------------------------------------------------------------------------
                 Foreign Bond   Intermediate       3-7 years                 B to Aaa; max              (greater than or =)
                                maturity hedged                              10% below Baa               85%(5)
                                non-U.S. fixed
                                income
                                securities
            ----------------------------------------------------------------------------------------------------------------
                 Emerging       Emerging market    0-8 years                 B to Aaa                   (greater than or =)
                 Markets Bond   fixed income                                                             80%(5)
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 High Yield      High Yield     Higher yielding    2-6 years                 B to Aaa; min              0-15%(4)
 Bond Funds                     fixed income                                 65% below Baa
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 Inflation-      Real           Inflation-         N/A                       B to Aaa; max              0-20%(3)
 Indexed         Return Bond    indexed fixed                                10% below Baa
 Bond Funds                     income
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
 Convertible     Convertible    Convertible        N/A                       Caa to Aaa; max            0-20%(3)
 Funds                          securities                                   40% below Baa
                                                                             and 10% below B
 ---------------------------------------------------------------------------------------------------------------------------
 Stock and       Strategic      Intermediate       0-6 years                 B to Aaa; max              0-20%(3)
 Bond Funds      Balanced       maturity fixed-                              10% below Baa
                                income
                                securities and
                                S&P 500 stock
                                index
                                derivatives
 ---------------------------------------------------------------------------------------------------------------------------
 Enhanced Index  StocksPLUS     S&P 500 stock      0-1 year                  B to Aaa; max              0-20%(3)
 Stock Funds                    index                                        10% below Baa
                                derivatives
                                backed by a
                                portfolio of
                                short-term
                                fixed-income
                                securities
 ---------------------------------------------------------------------------------------------------------------------------
</TABLE>

 (1) As rated by Moody's Investors Service, Inc., or equivalently rated by
     Standard & Poor's Rating Service, or if unrated, determined by PIMCO to
     be of comparable quality.
 (2) Each Fund (except the Long-Term U.S. Government Fund) may invest beyond
     these limits in U.S. dollar-denominated securities of non-U.S. issuers.
 (3) The percentage limitation relates to non-U.S. dollar-denominated
     securities.
 (4) The percentage limitation relates to euro-denominated securities.
 (5) The percentage limitation relates to securities of foreign issuers
     denominated in any currency.

  Pacific Investment Management Series
3
<PAGE>

            Summary Information (continued)

Fixed       The "Fixed Income Funds" are the Money Market, Short-Term, Low
Income      Duration, Total Return, Long-Term U.S. Government, Global Bond II,
Instruments Foreign Bond, Emerging Markets Bond, High Yield, and Real Return
            Bond Funds. Each Fixed Income Fund differs from the others
            primarily in the length of the Fund's duration or the proportion
            of its investments in certain types of fixed income securities.
            Each Fixed Income Fund invests at least 65% of its assets in
            "Fixed Income Instruments," which as used in this Prospectus
            includes:

            . securities issued or guaranteed by the U.S. Government, its
              agencies or government-sponsored enterprises ("U.S. Government
              Securities");
            . corporate debt securities of U.S. and non-U.S. issuers,
              including convertible securities and corporate commercial paper;
            . mortgage-backed and other asset-backed securities;
            . inflation-indexed bonds issued both by governments and
              corporations;
            . structured notes, including hybrid or "indexed" securities,
              event-linked bonds and loan participations;
            . delayed funding loans and revolving credit facilities;
            . bank certificates of deposit, fixed time deposits and bankers'
              acceptances;
            . repurchase agreements and reverse repurchase agreements;
            . debt securities issued by states or local governments and their
              agencies, authorities and other instrumentalities;
            . obligations of non-U.S. governments or their subdivisions,
              agencies and instrumentalities; and
            . obligations of international agencies or supranational entities.

Duration    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 Fund with a longer average portfolio duration
            will be more sensitive to changes in interest rates than a Fund
            with a shorter average portfolio duration.

Credit      In this Prospectus, references are made to credit ratings of debt
Ratings     securities which measure an issuer's expected ability to pay
            principal and interest over time. Credit ratings are determined by
            rating organizations, such as Standard & Poor's Rating Service
            ("S&P") or Moody's Investors Service, Inc. ("Moody's"). The
            following terms are generally used to describe the credit quality
            of debt securities depending on the security's credit rating or,
            if unrated, credit quality as determined by PIMCO:

            . high quality
            . investment grade
            . below investment grade ("high yield securities" or "junk bonds")

            For a further description of credit ratings, see "Appendix A--
            Description of Securities Ratings."

Fund        The Funds provide a broad range of investment choices. The
Descrip-    following summaries identify each Fund's investment objective,
tions,      principal investments and strategies, principal risks, performance
Perfor-     information and fees and expenses. A more detailed "Summary of
mance       Principal Risks" describing principal risks of investing in the
and Fees    Funds begins after the Fund Summaries.

             It is possible to lose money on investments in the Funds.

             An investment in a Fund is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.
                                                                   Prospectus
                                                                               4
<PAGE>

            PIMCO Convertible Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Convertible         Caa to Aaa; maximum
and           total return,         securities          40% below Baa and 10%
Strategies    consistent with                           below B
              prudent               Average Portfolio
              investment            Duration
              management            N/A                 Dividend Frequency
                                                        Declared and
              Fund Category                             distributed quarterly
              Convertible


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of convertible securities. Convertible
            securities, which are typically issued by small to mid-size
            capitalization companies, include, but are not limited to:
            corporate bonds, debentures, notes or preferred stocks and their
            hybrids that can be converted into (exchanged for) common stock or
            other securities, such as warrants or options, which provide an
            opportunity for equity participation.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 40% of its assets in high yield securities
            ("junk bonds") rated Caa or higher by Moody's or CCC or higher by
            S&P or, if unrated, determined by PIMCO to be of comparable
            quality. The Fund may only invest up to 10% of its assets in
            convertible securities rated Caa or CCC or, if unrated, determined
            by the Adviser to be of comparable quality. The Fund may also
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. In addition, the
            Fund may invest up to 35% of its assets in common stocks or in
            other Fixed Income Instruments.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, and may
            invest in mortgage- or asset-backed securities. The Fund may lend
            its portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's investments, plus capital appreciation arising from
            increases in the market value of the Fund's holdings.

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

              .Market Risk          .High Yield Risk      .Foreign Investment
              .Issuer Risk          .Derivatives Risk      Risk
              .Interest Rate Risk   .Smaller Company Risk .Currency Risk
              .Credit Risk          .Liquidity Risk       .Leveraging Risk
                                                          .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance As the Fund commenced operations in April, 1999, it does not yet
Information have a full calendar year of performance. Thus, no bar chart or
            annual returns table is included for the Fund.

Pacific Investment Management Series  5
<PAGE>

            PIMCO Convertible Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the Fund

            Shareholder Fees (fees paid directly from your investment)

<TABLE>

                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         <S>      <C>                                              <C>
         Class A  4.5%                                             1.0%(/1/)
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             5.0%(/2/)
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             1.0%(/3/)
         ---------------------------------------------------------------------------------------------------------
</TABLE>

         (1) Imposed only in certain circumstances where Class A shares are
             purchased without a front-end sales charge at the time of purchase.
         (2) The maximum CDSC is imposed on shares redeemed in the first year.
             For shares held longer than one year, the CDSC declines according
             to the schedule set forth under "Investment Options--Class A, B and
             C Shares--Contingent Deferred Sales Charges (CDSCs)--Class B
             Shares."
         (3) The CDSC on Class C shares is imposed only on shares redeemed in
             the first year.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.40%    0.25%             0.40%         1.05%
         --------------------------------------------------------------------
         Class B      0.40     1.00              0.40          1.80
         --------------------------------------------------------------------
         Class C      0.40     1.00              0.40          1.80
         --------------------------------------------------------------------
</TABLE>

         (1) Due to the 12b-1 distribution fee imposed on Class B and Class C
             shares, a Class B or Class C shareholder may, depending upon the
             length of time the shares are held, pay more than the economic
             equivalent of the maximum front-end sales charges permitted by
             relevant rules of the National Association of Securities Dealers,
             Inc.
         (2) Other Expenses reflects a 0.40% Administrative Fee paid by the
             class.

         Examples. The Examples are intended to help you compare the cost of
         investing in Class A, B or C shares of the Fund with the costs of
         investing in other mutual funds. The Examples assume that you invest
         $10,000 in the noted class of shares for the time periods indicated,
         your investment has a 5% return each year, the reinvestment of all
         dividends and distributions, and the Fund'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 do not
                      Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class  Year 1          Year 3          Year 5           Year 10     Year 1   Year 3 Year 5  Year 10
         ----------------------------------------------------------------------------------------------------------
         <S>          <C>             <C>             <C>              <C>           <C>    <C>    <C>     <C>
         Class A      $552            $769            $1,003           $1,675        $552   $769   $1,003  $1,675
         ----------------------------------------------------------------------------------------------------------
         Class B       683             866             1,175            1,822         183    566      975   1,822
         ----------------------------------------------------------------------------------------------------------
         Class C       283             566               975            2,116         183    566      975   2,116
         ----------------------------------------------------------------------------------------------------------
</TABLE>
                                                                     Prospectus
                                                                               6
<PAGE>

            PIMCO Emerging Markets Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus              Credit Quality
Investments   Seeks maximum          Emerging market fixed   B to Aaa
and           total return,          income securities
Strategies    consistent with                                Dividend Frequency
              preservation of        Average Portfolio       Declared daily and
              capital and prudent    Duration                distributed monthly
              investment management  0-8 years

              Fund Category
              International Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in Fixed
            Income Instruments of issuers that economically are tied to
            countries with emerging securities markets. Such securities may be
            denominated in non-U.S. currencies and the U.S. dollar. A security
            is economically tied to an emerging market country if it is
            principally traded on the country's securities markets, or the
            issuer is organized or principally operates in the country,
            derives a majority of its income from its operations within the
            country, or has a majority of its assets in the country. The
            average portfolio duration of the Fund varies based on PIMCO's
            forecast for interest rates and, under normal market conditions,
            is not expected to exceed eight years.

             PIMCO has broad discretion to identify and invest in countries
            that it considers to qualify as emerging securities markets.
            However, PIMCO generally considers an emerging securities market
            to be one located in any country that is defined as an emerging or
            developing economy by the World Bank or its related organizations,
            or the United Nations or its authorities. The Fund emphasizes
            countries with relatively low gross national product per capita
            and with the potential for rapid economic growth. PIMCO will
            select the Fund's country and currency composition based on its
            evaluation of relative interest rates, inflation rates, exchange
            rates, monetary and fiscal policies, trade and current account
            balances, and any other specific factors PIMCO believes to be
            relevant. The Fund likely will concentrate its investments in
            Asia, Africa, the Middle East, Latin America and the developing
            countries of Europe. The Fund may invest in securities whose
            return is based on the return of an emerging securities market,
            such as a derivative instrument, rather than investing directly in
            securities of issuers from emerging markets.

             The Fund may invest substantially all of its assets in high yield
            securities ("junk bonds") rated B or higher by Moody's or S&P, or,
            if unrated, determined by PIMCO to be of comparable quality. The
            Fund is non-diversified, which means that it may concentrate its
            assets in a smaller number of issuers than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Emerging Markets Risk      .Liquidity Risk
              .Credit Risk           .Foreign Investment Risk    .Derivatives
              .Market Risk           .Currency Risk               Risk
              .Issuer Risk           .Issuer Non-Diversification .Leveraging
              .High Yield Risk        Risk                        Risk
                                                                 .Management
                                                                  Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. Past
            performance is no guarantee of future results.

Pacific Investment Management Series
7
<PAGE>

            PIMCO Emerging Markets Bond Fund (continued)

            Calendar Year Total Returns -- Class A

                                    [GRAPH]                 Highest and Lowest
                                                            Quarter Returns
                                 Annual Return              (for periods shown
                                                            in the bar chart)
                                  98       99               --------------------
                                ------   ------             Highest (10/1/98-
                               -12.10%   26.10%             12/31/98)     12.17%
                                                            --------------------
                                                            Lowest (7/1/98-
                                                            9/30/98)     -21.14%

                   Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                                <C>    <C>
                                                                   Fund Inception
                                                            1 Year (7/31/97)
            ---------------------------------------------------------------------
         Class A                                            20.42%  1.11%
            ---------------------------------------------------------------------
         Class B                                            20.16%  1.24%
            ---------------------------------------------------------------------
         Class C                                            24.17%  2.26%
            ---------------------------------------------------------------------
         J.P. Morgan Emerging Markets Bond Index Plus(/1/)  25.99%  2.52%
            ---------------------------------------------------------------------
         Lipper Emerging Market Debt
          Fund Avg(/2/)                                     24.51% -1.10%
            ---------------------------------------------------------------------
</TABLE>

            (1) The J.P. Morgan Emerging Markets Bond Index Plus is an
                unmanaged index which tracks the total returns for external-
                currency denominated debt instruments of emerging markets. It
                is not possible to invest directly in the index.
            (2) The Lipper Emerging Market Debt Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that seek either current income or total return
                by investing at least 65% of total assets in emerging market
                debt securities. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.5%                                             1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (2) The maximum CDSC is imposed on shares redeemed in the first
                year. For shares held longer than one year, the CDSC declines
                according to the schedule set forth under "Investment
                Options--Class A, B and C Shares--Contingent Deferred Sales
                Charges (CDSCs)--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.45%    0.25%             0.55%         1.25%
            -----------------------------------------------------------------
         Class B      0.45     1.00              0.55          2.00
            -----------------------------------------------------------------
         Class C      0.45     1.00              0.55          2.00
            -----------------------------------------------------------------
</TABLE>
            (1) Due to the 12b-1 distribution fee imposed on Class B and Class
                C shares, a Class B or Class C shareholder may, depending upon
                the length of time the shares are held, pay more than the
                economic equivalent of the maximum front-end sales charges
                permitted by relevant rules of the National Association of
                Securities Dealers, Inc.
            (2) Other Expenses reflects a 0.55% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class  <S>              <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Year 1        Year 3          Year 5          Year 10          Year 1          Year 3 Year 5 Year 10
            --------------------------------------------------------------------------------------------------------
         Class A       $572            $829            $1,105           $1,893          $572   $829   $1,105  $1,893
            --------------------------------------------------------------------------------------------------------
         Class B        703             927             1,278            2,038           203    627    1,078   2,038
            --------------------------------------------------------------------------------------------------------
         Class C        303             627             1,078            2,327           203    627    1,078   2,327
            --------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               8
<PAGE>

            PIMCO Foreign Bond Fund

- --------------------------------------------------------------------------------
Principal    Investment Objective  Fund Focus                 Credit Quality
Investments  Seeks maximum         Intermediate maturity      B to Aaa; maximum
and          total return,         hedged non-U.S.            10% below Baa
Strategies   consistent with       fixed income securities
             preservation of                                  Dividend Frequency
             capital and prudent   Average Portfolio Maturity Declared daily
             investment management 3-7 years                  and distributed
                                                              monthly
             Fund Category
             International Bond


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 85% of its assets in Fixed
            Income Instruments of issuers located outside the United States,
            representing at least three foreign countries, which may be
            represented by futures contracts (including related options) with
            respect to such securities, and options on such securities. Such
            securities normally are denominated in major foreign currencies or
            baskets of foreign currencies (such as the euro). The Fund 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.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            The average portfolio duration of the Fund normally varies within
            a three- to seven-year time frame. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            assets in high yield securities ("junk bonds") rated B or higher
            by Moody's or S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund is non-diversified, which means that
            it may concentrate its assets in a smaller number of issuers than
            a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Foreign Investment Risk    .Mortgage Risk
              .Credit Risk         .Currency Risk              .Derivatives Risk
              .Market Risk         .Issuer Non-Diversification .Leveraging Risk
              .Issuer Risk          Risk                       .Management Risk
                                   .Liquidity Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/20/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

  Pacific Investment Management Series
9
<PAGE>

            PIMCO Foreign Bond Fund (continued)

            Calendar Year Total Returns -- Class A

                        [GRAPH]

                     Annual Return                        Highest and Lowest
                                                          Quarter Returns
   93      94      95      96      97      98      99
 ------  ------  ------  ------  ------  ------  ------   (for periods shown
 15.92%  -7.72%  20.68%  18.42%   9.07%   9.53%   1.11%   in the bar chart)
                                                          --------------------
                                                          Highest (10/1/95-
                                                          12/31/95)      7.12%
                                                          --------------------
                                                          Lowest (1/1/94-
                                                          3/31/94)      -4.32%

                   Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                       <C>    <C>     <C>
                                                                  Fund Inception
                                                   1 Year 5 Years (12/3/92)(/3/)
            --------------------------------------------------------------------
         Class A                                   -3.44% 10.52%  8.57%
            --------------------------------------------------------------------
         Class B                                   -4.35% 10.46%  8.50%
            --------------------------------------------------------------------
         Class C                                   -0.58% 10.72%  8.48%
            --------------------------------------------------------------------
         J.P. Morgan Non-U.S. Index (Hedged)(/1/)   2.48% 11.14%  9.11%
            --------------------------------------------------------------------
         Lipper International Income Fund
          Avg(/2/)                                 -4.57%  6.45%  6.06%
            --------------------------------------------------------------------
</TABLE>
            (1)  The J.P. Morgan Non-U.S. Index (Hedged) in an unmanaged index
                 representative of the total return performance in U.S.
                 dollars of major non-U.S. bond markets with an average
                 duration of 5.62 years as of 12/31/99. It is not possible to
                 invest directly in the index.
            (2)  The Lipper International Income Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest primarily in U.S.
                 dollar and non-U.S dollar debt securities of issuers located
                 in at least three countries, excluding the United States,
                 except in periods of market weakness. It does not take into
                 account sales charges.
            (3)  The Fund commenced operations 12/3/92. Index comparisons
                 begin on 11/30/92.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.5%                                             1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>
            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.25%    0.25%             0.45%         0.95%
            -----------------------------------------------------------------
         Class B      0.25     1.00              0.45          1.70
            -----------------------------------------------------------------
         Class C      0.25     1.00              0.45          1.70
            -----------------------------------------------------------------
</TABLE>
            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.45% Administrative Fee paid by
                 the class.

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

<TABLE>
<CAPTION>
                                                                                        Example: Assuming you do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class   Year 1          Year 3          Year 5           Year 10         Year 1 Year 3 Year 5 Year 10
         <S>           <C>             <C>             <C>              <C>             <C>    <C>    <C>    <C>
            --------------------------------------------------------------------------------------------------------
         Class A       $543            $739             $952            $1,564          $543   $739   $952    $1,564
            --------------------------------------------------------------------------------------------------------
         Class B        673             836            1,123             1,712           173    536    923     1,712
            --------------------------------------------------------------------------------------------------------
         Class C        273             536              923             2,009           173    536    923     2,009
            --------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              10
<PAGE>

            PIMCO Global Bond Fund II

- --------------------------------------------------------------------------------
Principal    Investment Objective  Fund Focus               Credit Quality
Investments  Seeks maximum total   U.S. and hedged          B to Aaa; maximum
and          return, consistent    foreign intermediate     10% below Baa
Strategies   with preservation     maturity fixed
             of capital            income securities
                                                            Dividend Frequency
                                                            Declared daily and
             Fund Category         Average Portfolio        distributed monthly
             International Bond    Duration
                                   3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in Fixed
            Income Instruments of issuers located in at least three countries
            (one of which may be the United States), which may be represented
            by futures contracts (including related options) with respect to
            such securities, and options on such securities. The Fund invests
            primarily in securities of issuers located in economically
            developed countries. Securities may be denominated in major
            foreign currencies, baskets of foreign currencies (such as the
            euro), or the U.S. dollar. The Fund 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.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            Investments in the securities of issuers located outside the
            United States will normally vary between 25% and 75% of the Fund's
            assets. The average portfolio duration of this Fund normally
            varies within a three- to seven-year time frame. The Fund invests
            primarily in investment grade securities, but may invest up to 10%
            of its assets in high yield securities ("junk bonds") rated B or
            higher by Moody's or S&P, or, if unrated, determined by PIMCO to
            be of comparable quality. The Fund is non-diversified, which means
            that it may concentrate its assets in a smaller number of issuers
            than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

             . Interest Rate Risk . Foreign Investment Risk    . Mortgage Risk
             . Credit Risk        . Currency Risk              . Derivatives
             . Market Risk        . Issuer Non-Diversification   Risk
             . Issuer Risk          Risk                       . Leveraging Risk
                                  . Liquidity Risk             . Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. Past
            performance is no guarantee of future results.


Pacific Investment Management Series
11
<PAGE>

            PIMCO Global Bond Fund II (continued)

            Calendar Year Total Returns -- Class A


                               [GRAPH]

                            Annual Return                  Highest and Lowest
                                                           Quarter Returns
                    96       97       98      99           (for periods shown
                  ------   -----    -----   ------         in the bar chart)
                  12.40%   8.29%    7.29%   -0.11%         ---------------------
                                                           Highest (07/01/96-
                  Calendar Year End (through 12/31)        09/30/96)       5.29%
                                                           ---------------------
                                                           Lowest (07/01/99-
                                                           09/30/99)      -1.82%

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                                    Fund Inception
                                                     1 Year         (10/2/95)(/3/)
         -------------------------------------------------------------------------
         <S>                                         <C>            <C>
         Class A                                     -4.61%         6.93%
         -------------------------------------------------------------------------
         Class B                                     -5.59%         6.91%
         -------------------------------------------------------------------------
         Class C                                     -1.80%         7.26%
         -------------------------------------------------------------------------
         J.P. Morgan Global (Hedged) Index(/1/)       0.73%         8.40%
         -------------------------------------------------------------------------
         Lipper Growth Income Fund Avg(/2/)          -2.43%         4.63%
         -------------------------------------------------------------------------
</TABLE>
            (1)  The J.P. Morgan Global (Hedged) Index is an unmanaged index
                 representative of the total return performance in U.S.
                 dollars on a hedged basis of major world bond markets. It is
                 not possible to invest directly in the index.
            (2)  The Lipper Global Income Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc. that invest primarily in U.S. dollar and non-
                 U.S. dollar debt securities of issuers located in at least
                 three countries, one of which may be the United States. It
                 does not take into account sales charges.
            (3)  The Fund commenced operations on 10/2/95. Index comparisons
                 begin on 9/30/95.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         <S>      <C>                                              <C>
         Class A  4.5%                                             1%(/1/)
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
         ---------------------------------------------------------------------------------------------------------
</TABLE>
            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.25%    0.25%             0.45%         0.95%
         --------------------------------------------------------------------
         Class B      0.25     1.00              0.45          1.70
         --------------------------------------------------------------------
         Class C      0.25     1.00              0.45          1.70
         --------------------------------------------------------------------
</TABLE>
            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.45% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares

         <S>           <C>             <C>             <C>              <C>             <C>        <C>        <C>     <C>
         Share Class   Year 1          Year 3          Year 5           Year 10         Year 1     Year 3     Year 5  Year 10
         --------------------------------------------------------------------------------------------------------------------
         Class A       $543            $739             $952            $1,564          $543       $739       $952    $1,564
         --------------------------------------------------------------------------------------------------------------------
         Class B        673             836            1,123             1,712           173        536        923     1,712
         --------------------------------------------------------------------------------------------------------------------
         Class C        273             536              923             2,009           173        536        923     2,009
         --------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              12
<PAGE>

            PIMCO High Yield Fund

- --------------------------------------------------------------------------------
Principal   Investment Objectiv   Fund Focus                 Credit Quality
Investments Seeks maximum total   Higher yielding fixed      B to Aaa; minimum
and         return, consistent    income securities          65% below Baa
Strategies  with preservation of
            capital and prudent
            investment management Average Portfolio Duration Dividend Frequency
                                  2-6 years                  Declared daily and
                                                             distributed monthly
            Fund Category
            High Yield Bond


            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of high yield securities ("junk bonds")
            rated below investment grade but rated at least B by Moody's or
            S&P, or, if unrated, determined by the Adviser to be of comparable
            quality. The remainder of the Fund's assets may be invested in
            investment grade Fixed Income Instruments. The average portfolio
            duration of this Fund normally varies within a two- to six-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            may invest up to 15% of its assets in euro-denominated securities
            and may invest without limit in U.S. dollar-denominated securities
            of foreign issuers. The Fund normally will hedge at least 75% of
            its exposure to the euro to reduce the risk of loss due to
            fluctuations in currency exchange rates.

             The Fund may invest up to 15% of its assets in derivative
            instruments, such as options, futures contracts or swap
            agreements. The Fund may invest all of its assets in mortgage- or
            asset-backed securities. The Fund may lend its portfolio
            securities to brokers, dealers and other financial institutions to
            earn income. The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The "total return"
            sought by the Fund consists of income earned on the Fund's
            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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk   .Issuer Risk        .Foreign Investment Risk
              .Credit Risk          .Liquidity Risk     .Currency Risk
              .High Yield Risk      .Derivatives Risk   .Leveraging Risk
              .Market Risk          .Mortgage Risk      .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/13/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

  Pacific Investment Management Series
13
<PAGE>

            PIMCO High Yield Fund (continued)

            Calendar Year Total Returns -- Class A


                        [GRAPH]                             Highest and Lowest
                                                            Quarter Returns
                     Annual Return                          (for periods shown
                                                            in the bar chart)
  93      94      95      96      97      98      99        --------------------
- ------  ------  ------  ------  ------  ------  ------      Highest (1/1/93-
18.26%   2.01%  20.23%  11.28%  12.78%   6.12%   2.41%      3/31/93)       6.17%
                                                            --------------------
          Calendar Year End (through 12/31)                 Lowest (7/1/98-
                                                            9/30/98)      -1.86%

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                                   <C>    <C>     <C>
                                                                              Fund Inception
                                                               1 Year 5 Years (12/16/92)(/3/)
            ---------------------------------------------------------------------------------
         Class A                                               -2.20% 9.39%   9.49%
            ---------------------------------------------------------------------------------
         Class B                                               -3.07% 9.31%   9.41%
            ---------------------------------------------------------------------------------
         Class C                                                0.70% 9.60%   9.42%
            ---------------------------------------------------------------------------------
         Lehman Brothers BB Intermediate Corporate Index(/1/)   2.20% 9.38%   8.85%
            ---------------------------------------------------------------------------------
         Lipper High Current Yield Fund Avg(/2/)                4.53% 8.84%   8.65%
            ---------------------------------------------------------------------------------
</TABLE>
            (1)  The Lehman Brothers BB Intermediate Corporate Index is an
                 unmanaged index comprised of various fixed income securities
                 rated BB with an average duration of 4.40 years as of
                 12/31/99. It is not possible to invest directly in the index.
            (2)  The Lipper High Current Yield Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc. that aim at high (relative) current yield from
                 fixed income securities, have no quality or maturity
                 restrictions, and tend to invest in lower grade debt issues.
                 It does not take into account sales charges.
            (3)  The Fund commenced operations on 12/16/92. Index comparisons
                 begin on 12/31/92.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund
            Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.5%                                             1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>
            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.25%    0.25%             0.40%         0.90%
            -----------------------------------------------------------------
         Class B      0.25     1.00              0.40          1.65
            -----------------------------------------------------------------
         Class C      0.25     1.00              0.40          1.65
            -----------------------------------------------------------------
</TABLE>
            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                      Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class  Year 1          Year 3          Year 5          Year 10          Year 1 Year 3 Year 5 Year 10
            -------------------------------------------------------------------------------------------------------
         <S>          <C>             <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A      $538            $724             $926            $1,508          $538   $724   $926    $1,508
            -------------------------------------------------------------------------------------------------------
         Class B       668             820            1,097             1,657           168    520    897     1,657
            -------------------------------------------------------------------------------------------------------
         Class C       268             520              897             1,955           168    520    897     1,955
            -------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              14
<PAGE>

            PIMCO Long-Term U.S. Government Fund

- --------------------------------------------------------------------------------
Principal    Investment Objective Fund Focus                 Credit Quality
Investments  Seeks maximum        Long-term                  A to Aaa
and          total return,        maturity fixed
Strategies   consistent with      income
             preservation of      securities                 Dividend Frequency
             capital and                                     Declared daily and
             prudent investment                              distributed monthly
             management           Average Portfolio Duration
                                  (greater than or =)8 years
             Fund Category
             Long Duration
             Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of fixed income securities that are issued
            or guaranteed by the U.S. Government, its agencies or government-
            sponsored enterprises ("U.S. Government Securities"). Assets not
            invested in U.S. Government Securities may be invested in other
            types of Fixed Income Instruments. The Fund also may obtain
            exposure to U.S. Government Securities through the use of futures
            contracts (including related options) with respect to such
            securities, and options on such securities, when PIMCO deems it
            appropriate to do so. While PIMCO may invest in derivatives any
            time it deems appropriate, it will generally do so when it
            believes that U.S. Government Securities are overvalued relative
            to derivative instruments. This Fund will normally have a minimum
            average portfolio duration of eight years. For point of reference,
            the dollar-weighted average portfolio maturity of the Fund is
            normally expected to be more than ten years.

             The Fund's investments in Fixed Income Instruments are limited to
            those of investment grade U.S. dollar-denominated securities of
            U.S. issuers that are rated at least A by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. In
            addition, the Fund may only invest up to 10% of its assets in
            securities rated A by Moody's or S&P, and may only invest up to
            25% of its assets in securities rated Aa by Moody's or AA by S&P.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage-backed securities. The Fund may lend its portfolio
            securities to brokers, dealers and other financial institutions to
            earn income. The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The "total return"
            sought by the Fund consists of income earned on the Fund's
            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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk   .Issuer Risk          .Leveraging Risk
              .Credit Risk          .Derivatives Risk     .Management Risk
              .Market Risk          .Mortgage Risks

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/20/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

  Pacific Investment Management Series
15

<PAGE>

            PIMCO Long-Term U.S. Government Fund (continued)

            Calendar Year Total Returns -- Class A


                           [GRAPH]                          Highest and Lowest
                                                            Quarter Returns
                        Annual Return                       (for periods shown
                                                            in the bar chart)
    92     93     94     95     96     97     98     99     --------------------
  ------ ------ ------ ------ ------ ------ ------ ------   Highest (4/1/95-
  11.56% 18.21% -7.77% 31.09%  0.31% 14.59% 12.97% -8.35%   6/30/95)      10.66%
                                                            --------------------
                                                            Lowest (1/1/96-
                                                            3/31/96)      -6.35%

                   Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                               <C>         <C>         <C>
                                                                   Fund Inception
                                           1 Year      5 Years     (7/1/91)(/3/)
            ---------------------------------------------------------------------
         Class A                           -12.47%     8.30%       9.35%
            ---------------------------------------------------------------------
         Class B                           -13.36%     8.18%       9.27%
            ---------------------------------------------------------------------
         Class C                            -9.89%     8.49%       9.15%
            ---------------------------------------------------------------------
         Lehman Long-Term Treasury Bond
          Index(/1/)                        -8.74%     9.08%       9.04%
            ---------------------------------------------------------------------
         Lipper General U.S. Government
          Fund Avg(/2/)                     -3.01%     6.51%       6.46%
            ---------------------------------------------------------------------
</TABLE>
            (1)  The Lehman Long-Term Treasury Index is an unmanaged index of
                 U.S. Treasury issues with maturities greater than 10 years.
                 It is not possible to invest directly in the index.
            (2)  The Lipper General U.S. Government Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in U.S. government and agency issues. It does not take
                 into account sales charges.
            (3)  The Fund commenced operations on 7/1/91. Index comparisons
                 begin on 6/30/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.5%                                             1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>
            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.25%    0.25%             0.40%         0.90%
            -----------------------------------------------------------------
         Class B      0.25     1.00              0.40          1.65
            -----------------------------------------------------------------
         Class C      0.25     1.00              0.40          1.65
            -----------------------------------------------------------------
</TABLE>
            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class   Year 1         Year 3          Year 5           Year 10        Year 1  Year 3  Year 5 Year 10
            --------------------------------------------------------------------------------------------------------
         <S>           <C>            <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A       $538            $724             $926            $1,508          $538   $724   $926    $1,508
            --------------------------------------------------------------------------------------------------------
         Class B        668             820            1,097             1,657           168    520    897     1,657
            --------------------------------------------------------------------------------------------------------
         Class C        268             520              897             1,955           168    520    897     1,955
            --------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              16
<PAGE>

            PIMCO Low Duration Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus         Credit Quality
Investments   Seeks maximum total    Short maturity     B to Aaa; maximum
and           return, consistent     fixed income       10% below Baa
Strategies    with preservation of   securities
              capital and prudent
              investment                                Dividend Frequency
              management             Average Portfolio  Declared daily and
                                     Duration           distributed monthly
                                     13 years
              Fund Category
              Short Duration Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a one- to three-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk   .Derivatives Risk         .Currency Risk
              .Credit Risk          .Liquidity Risk           .Leveraging Risk
              .Market Risk          .Mortgage Risk            .Management Risk
              .Issuer Risk          .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/13/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

   Pacific Investment Management Series
17

<PAGE>

            PIMCO Low Duration Fund (continued)

            Calendar Year Total Returns -- Class A

                  [GRAPH]

               Annual Return                                Highest and Lowest
                                                            Quarter Returns
  90     91     92     93     94     95     96              (for periods shown
- ------ ------ ------ ------ ------ ------ ------            in the bar chart)
 8.54% 12.94%  7.20%  7.27%  0.16% 11.41%  5.54%            --------------------
                                                            Highest (10/1/91-
  97     98     99                                          12/31/91)      3.78%
- ------ ------ ------                                        --------------------
 7.74%  6.66%  2.49%                                        Lowest (1/1/94-
                                                            3/31/94)      -0.44%
        Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                         <C>    <C>     <C>
                                                     1 Year 5 Years 10 Years
            ----------------------------------------------------------------
         Class A                                     -0.58% 6.10%   6.62%
            ----------------------------------------------------------------
         Class B                                     -3.11% 5.63%   6.39%
            ----------------------------------------------------------------
         Class C                                      1.02% 6.23%   6.42%
            ----------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(/1/)   3.06% 6.51%   6.59%
            ----------------------------------------------------------------
         Lipper Short Investment Grade Debt
          Fund Avg(/2/)                               2.81% 5.95%   6.36%
            ----------------------------------------------------------------
</TABLE>

            (1)  The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
                 index of U.S Treasury obligations having maturities from one
                 to 2.99 years. It is not possible to invest directly in the
                 index.
            (2)  The Lipper Short Investment Grade Debt Fund Average is a
                 total return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in investment-grade debt issues (rated in the top four
                 grades) with dollar-weighted average maturities of less than
                 three years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund
            Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  3%                                               1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.25%    0.25%             0.40%         0.90%
            -----------------------------------------------------------------
         Class B      0.25     1.00              0.40          1.65
            -----------------------------------------------------------------
         Class C      0.25     0.75              0.40          1.40
            -----------------------------------------------------------------
</TABLE>

            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class   Year 1        Year 3          Year 5          Year 10          Year 1   Year 3 Year 5  Year 10
            --------------------------------------------------------------------------------------------------------
         <S>          <C>              <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A       $389            $578             $784            $1,375          $389   $578   $784    $1,375
            --------------------------------------------------------------------------------------------------------
         Class B        668             820            1,097             1,657           168    520    897     1,657
            --------------------------------------------------------------------------------------------------------
         Class C        243             443              766             1,680           143    443    766     1,680
            --------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              18
<PAGE>

            PIMCO Money Market Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Money market        Minimum 95%
and           current income,       instruments         rated Aaa or
Strategies    consistent with                           Prime 1;
              preservation of                           (less than or
              capital and           Average Portfolio   =) 5% Aa or
              daily liquidity       Maturity            Prime 2
                                    (less than or =)
                                    90 days dollar-
              Fund Category         weighted average    Dividend Frequency
              Short                 maturity            Declared daily
              Duration Bond                             and distributed
                                                        monthly
            The Fund seeks to achieve its investment objective by investing at
            least 95% of its assets in a diversified portfolio of money market
            securities that are in the highest rating category for short-term
            obligations. The Fund also may invest up to 5% of its assets in
            money market securities that are in the second-highest rating
            category for short-term obligations. The Fund may only invest in
            U.S. dollar-denominated securities that mature in 397 days or
            fewer from the date of purchase. The dollar-weighted average
            portfolio maturity of the Fund may not exceed 90 days.

             The Fund attempts to maintain a stable net asset value of $1.00
            per share, although there is no assurance that it will be
            successful in doing so.

             The Fund may invest in the following: obligations of the U.S.
            Government (including its agencies and instrumentalities); short-
            term corporate debt securities of domestic and foreign
            corporations; obligations of domestic and foreign commercial
            banks, savings banks, and savings and loan associations; and
            commercial paper. The Fund may invest more than 25% of its assets
            in securities or obligations issued by U.S. banks. The Fund may
            lend its portfolio securities to brokers, dealers and other
            financial institutions in order to earn income.

             The Fund's investments will comply with applicable rules
            governing the quality, maturity and diversification of securities
            held by money market funds.

- --------------------------------------------------------------------------------
Principal   An investment in the Fund is not insured or guaranteed by the
Risks       Federal Deposit Insurance Corporation or any other government
            agency. Although the Fund seeks to preserve the value of your
            investment at $1.00 per share, it is possible to lose money by
            investing in the Fund. Among the principal risks of investing in
            the Fund, which could adversely affect its net asset value, yield
            and total return, are:

              .Interest Rate Risk   .Issuer Risk
              .Credit Risk          .Management Risk
              .Market Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/13/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. To obtain the Fund's current yield, call 1-800-
            927-4648. Past performance is no guarantee of future results.

  Pacific Investment Management Series
19
<PAGE>

            PIMCO Money Market Fund (continued)

            Calendar Year Total Returns -- Class A


                   [GRAPH]                           Highest and Lowest
                                                     Quarter Returns
                Annual Return                        (for periods shown
                                                     in the bar chart)
  92    93    94    95    96    97    98    99       -------------------
 ----- ----- ----- ----- ----- ----- ----- -----     Highest (10/1/95 -
 3.18% 2.54% 3.66% 5.80% 5.02% 5.04% 4.97% 4.61%     12/31/95)     1.65%
                                                     -------------------
       Calendar Year End (through 12/31)             Lowest (4/1/93 -
                                                     6/30/93)      0.61%

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                                                Fund Inception
                                                       1 Year      5 Years      (3/1/91)(/3/)
            ----------------------------------------------------------------------------------
         <S>                                           <C>         <C>          <C>
         Class A                                       4.61%       5.09%        4.45%
            ----------------------------------------------------------------------------------
         Class B                                       3.78%       4.20%        3.54%
            ----------------------------------------------------------------------------------
         Class C                                       4.64%       5.12%        4.46%
            ----------------------------------------------------------------------------------
         Salomon 3-month Treasury Bill Index(/1/)      4.73%       5.20%        4.70%
            ----------------------------------------------------------------------------------
         Lipper Money Market Fund Avg(/2/)             4.92%       5.32%        4.77%
            ----------------------------------------------------------------------------------
</TABLE>

            (1) The Salomon 3-month Treasury Bill Index is an unmanaged index
                representing monthly return equivalents of yield averages of
                the last 3 month Treasury Bill issues. It is not possible to
                invest directly in the index.
            (2) The Lipper Money Market Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest in high quality financial
                instruments (rated in the top two grades) with dollar-weighted
                average maturities of less than 90 days. It does not take into
                account sales charges.
            (3) The Fund commenced operations on 3/1/91. Index comparisons
                begin on 2/28/91.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         Class A  None(/1/)                                        None
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             None
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             None
         ---------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Regular sales charges apply when Class A shares of the Money
                Market Fund (on which no sales charge was paid at the time of
                purchase) are exchanged for shares of any other Fund.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.15%    0.10%             0.35%         0.60%
         --------------------------------------------------------------------
         Class B      0.15     1.00              0.35          1.50
         --------------------------------------------------------------------
         Class C      0.15     0.10              0.35          0.60
         --------------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and
                Class C shares, a Class B or Class C shareholder may,
                depending upon the length of time the shares are held, pay
                more than the economic equivalent of the maximum front-end
                sales charges permitted by relevant rules of the National
                Association of Securities Dealers, Inc.
            (2) Other Expenses reflects a 0.35% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 shares  Example: Assuming you do not redeem
                      at the end of each period            your shares
         Share Class  Year 1   Year 3   Year 5   Year 10   Year 1   Year 3   Year 5   Year 10
         -------------------------------------------------------------------------------------
         <S>          <C>      <C>      <C>      <C>       <C>      <C>      <C>      <C>
         Class A      $61      $192      $335     $750     $61      $192     $335      $750
         -------------------------------------------------------------------------------------
         Class B      653       774     1,018    1,429     153       474      818     1,429
         -------------------------------------------------------------------------------------
         Class C      161       192       335      750      61       192      335       750
         -------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              20
<PAGE>

            PIMCO Real Return Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus            Credit Quality
Investments   Seeks maximum         Inflation-            B to Aaa; maximum 10%
and           real return,          indexed fixed         below Baa
Strategies    consistent with       income
              preservation of       securities            Dividend Frequency
              real capital and                            Declared daily and
              prudent               Average Portfolio     distributed monthly
              investment            Duration
              management            See description below

              Fund Category
              Inflation-
              Indexed Bond

            The Fund seeks its investment objective by investing under normal
            circumstances at least 65% of its assets in inflation-indexed
            bonds issued by the U.S. and non-U.S. governments, their agencies
            or instrumentalities, and corporations. Inflation-indexed bonds
            are fixed income securities that are structured to provide
            protection against inflation. The value of the bond's principal or
            the interest income paid on the bond is adjusted to track changes
            in an official inflation measure. The U.S. Treasury uses the
            Consumer Price Index for Urban Consumers as the inflation measure.
            Inflation-indexed bonds issued by a foreign government are
            generally adjusted to reflect a comparable inflation index,
            calculated by that government. "Real return" equals total return
            less the estimated cost of inflation, which is typically measured
            by the change in an official inflation measure.

             Because of the unique features of inflation-indexed bonds, PIMCO
            uses a modified form of duration for the Fund ("real duration")
            which measures price changes as a result of changes in "real"
            interest rates. A "real" interest rate is the market interest rate
            minus expected inflation. There is no limit on the real duration
            of the Fund, but it is expected that the average real duration of
            the Fund will normally vary approximately within the range of the
            average real duration of all inflation-indexed bonds issued by the
            U.S. Treasury in the aggregate, which as of March 7, 2000 was 9.0
            years. For point of reference, it is expected that the average
            portfolio duration (as opposed to real duration) of the Fund will
            generally vary within a one- to five-year time frame, although
            this range is subject to change.

             The Fund invests primarily in investment grade securities, but
            may invest up to 10% of its assets in securities rated below
            investment grade but rated B or higher by Moody's or S&P (or, if
            unrated, determined by the Adviser to be of comparable quality).
            The Fund also may invest up to 20% of its assets in securities
            denominated in foreign currencies, and may invest beyond this
            limit in U.S. dollar denominated securities of foreign issuers.
            The Fund is non-diversified, which means that it may concentrate
            its assets in a smaller number of issuers than a diversified Fund.
            The Fund may also invest up to 35% of its assets in securities
            denominated in foreign currencies, and may invest beyond this
            limit in U.S. dollar-denominated securities of foreign issuers.
            The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

              .Interest Rate Risk  .Derivatives Risk            .Currency Risk
              .Credit Risk         .Liquidity Risk              .Leveraging Risk
              .Market Risk         .Issuer Non-Diversification  .Management Risk
              .Issuer Risk          Risk
                                   .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. Past
            performance is no guarantee of future results.

   Pacific Investment Management Series
21
<PAGE>

            PIMCO Real Return Bond Fund (continued)

            Calendar Year Total Returns -- Class A

                                    [GRAPH]                 Highest and Lowest
                                                            Quarter Returns
                                 Annual Return              (for periods shown
                                                            in the bar chart)
                                  98      99                --------------------
                                ------  ------              Highest (7/1/98-
                                 4.77%   5.29%              9/30/98)       3.09%
                                                            --------------------
                                                            Lowest (9/1/98-
                                                            12/31/98)     -0.15%


                       Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                           <C>        <C>
                                                                  Fund Inception
                                                       1 Year     (1/29/97)
            --------------------------------------------------------------------
         Class A                                        2.14%     3.62%
            --------------------------------------------------------------------
         Class B                                       -0.39%     3.02%
            --------------------------------------------------------------------
         Class C                                        3.79%     4.18%
            --------------------------------------------------------------------
         Lehman Brothers Inflation
          Linked Treasury Index(/1/)                    2.36%     2.99%
            --------------------------------------------------------------------
         Lipper Short U.S. Government Fund Avg(/2/)     2.50%     4.57%
            --------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Inflation Linked Treasury Index is an
                unmanaged index consisting of the U.S. Treasury Inflation
                Protected Securities market with an average duration of 3.2
                years as of 12/31/99. It is not possible to invest directly in
                the index.
            (2) The Lipper Short U.S. Government Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in securities issued or guaranteed by the U.S.
                government, its agencies, or its instrumentalities, with
                dollar-weighted average maturities of less than three years.
                It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  3%                                               1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (2) The maximum CDSC is imposed on shares redeemed in the first
                year. For shares held longer than one year, the CDSC declines
                according to the schedule set forth under "Investment
                Options--Class A, B and C Shares--Contingent Deferred Sales
                Charges (CDSCs)--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.25%    0.25%             0.42%         0.92%
            -----------------------------------------------------------------
         Class B      0.25     1.00              0.43          1.68
            -----------------------------------------------------------------
         Class C      0.25     0.75              0.43          1.43
            -----------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and Class
                C shares, a Class B or Class C shareholder may, depending upon
                the length of time the shares are held, pay more than the
                economic equivalent of the maximum front-end sales charges
                permitted by relevant rules of the National Association of
                Securities Dealers, Inc.
            (2) Other Expenses reflects a 0.40% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 shares at the end of each period    Example: Assuming you do not
                                                                                                redeem your shares
         Share Class  Year 1         Year 3          Year 5           Year 10          Year 1 Year 3 Year 5 Year 10
            -------------------------------------------------------------------------------------------------------
         <S>          <C>             <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A      $391            $584             $794            $1,397          $391   $584   $794    $1,397
            -------------------------------------------------------------------------------------------------------
         Class B       671             830            1,113             1,686           171    530    913     1,686
            -------------------------------------------------------------------------------------------------------
         Class C       246             452              782             1,713           146    452    782     1,713
            -------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              22
<PAGE>

            PIMCO Short-Term Fund

- --------------------------------------------------------------------------------
Principal        Investment Objective     Fund Focus          Credit Quality
Investments      Seeks maximum            Money market        B to Aaa; maximum
and Strategies   current income,          instruments and     10% below Baa
                 consistent with          short maturity
                 preservation of          fixed income
                 capital and daily        securities          Dividend Frequency
                 liquidity                                    Declared daily and
                                                              distributed
                                          Average Portfolio   monthly
                 Fund Category            Duration
                 Short Duration Bond      0-1 year

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            does not exceed one year. For point of reference, the dollar-
            weighted average portfolio maturity of the Fund is normally not
            expected to exceed three years.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 5% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Issuer Risk           .Leveraging Risk
              .Credit Risk           .Derivatives Risk      .Management Risk
              .Market Risk           .Mortgage Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with a broad-based securities market index and an index of similar
            funds. The bar chart and the information to its right show
            performance of the Fund's Class A shares, but do not reflect the
            impact of sales charges (loads). If they did, the returns would be
            lower than those shown. Unlike the bar chart, performance for
            Class A, B and C shares in the Average Annual Total Returns table
            reflect the impact of sales charges. For periods prior to the
            inception date of Class A, B and C shares (1/20/97), performance
            information shown in the bar chart and table for those classes is
            based on the performance of the Fund's Institutional Class shares,
            which are offered in a different prospectus. The prior
            Institutional Class performance has been adjusted to reflect the
            actual sales charges (in the Average Annual Total Returns table
            only), distribution and/or service (12b-1) fees, administrative
            fees and other expenses paid by Class A, B and C shares. Past
            performance is no guarantee of future results.

  Pacific Investment Management Series
23
<PAGE>

            PIMCO Short-Term Fund (continued)

            Calendar Year Total Returns -- Class A

                 [GRAPH]

             Annual Return                 More Recent Return Information
                                           ------------------------------------
 90      91     92     93     94     95    1/1/99-6/30/99                 2.31%
- -----  -----  -----  -----  -----  -----   Highest and Lowest Quarter Returns
8.04%  6.23%  3.21%  4.21%  2.48%  8.76%   (for periods shown in the bar chart)
                                           ------------------------------------
 96      97     98     99                  Highest (10/1/95-12/31/95)     2.49%
- -----  -----  -----  -----                 ------------------------------------
6.58%  6.07%  5.32%  4.82%                 Lowest (1/1/94-3/31/94)        0.10%

                       Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>
                                                     1 Year 5 Years 10 Years
         -------------------------------------------------------------------
         <S>                                         <C>    <C>     <C>
         Class A                                      2.72% 5.87%   5.34%
         -------------------------------------------------------------------
         Class B                                     -0.93% 5.22%   5.00%
         -------------------------------------------------------------------
         Class C                                      3.51% 5.99%   5.24%
         -------------------------------------------------------------------
         Salomon 3-month Treasury Bill Index(/1/)     4.73% 5.20%   5.05%
         -------------------------------------------------------------------
         Lipper Ultrashort Obligation Fund Avg(/2/)   4.58% 5.62%   5.59%
         -------------------------------------------------------------------
</TABLE>

            (1) The Salomon 3-month Treasury Bill Index is an unmanaged index
                representing monthly return equivalents of yield averages of
                the last 3 month Treasury Bill issues. It is not possible to
                invest directly in the index.
            (2) The Lipper Ultrashort Obligation Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues or better, and maintain
                a portfolio dollar-weighted average maturity between 91 and
                365 days. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         <S>      <C>                                              <C>
         Class A  2%                                               1%(/1/)
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
         ---------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (2) The maximum CDSC is imposed on shares redeemed in the first
                year. For shares held longer than one year, the CDSC declines
                according to the schedule set forth under "Investment
                Options--Class A, B and C Shares--Contingent Deferred Sales
                Charges (CDSCs)--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.25%    0.25%             0.35%         0.85%
         --------------------------------------------------------------------
         Class B      0.25     1.00              0.35          1.60
         --------------------------------------------------------------------
         Class C      0.25     0.55              0.35          1.15
         --------------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and
                Class C shares, a Class B or Class C shareholder may,
                depending upon the length of time the shares are held, pay
                more than the economic equivalent of the maximum front-end
                sales charges permitted by relevant rules of the National
                Association of Securities Dealers, Inc.
            (2) Other Expenses reflects a 0.35% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 shares  Example: Assuming you do not redeem
                      at the end of each period            your shares
         Share Class  Year 1   Year 3   Year 5   Year 10   Year 1   Year 3   Year 5   Year 10
         -------------------------------------------------------------------------------------
         <S>          <C>      <C>      <C>      <C>       <C>      <C>      <C>      <C>
         Class A      $285     $466      $662    $1,228    $285     $466     $662     $1,228
         -------------------------------------------------------------------------------------
         Class B       663      805     1,071     1,601     163      505      871      1,601
         -------------------------------------------------------------------------------------
         Class C       217      365       633     1,398     117      365      633      1,398
         -------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              24
<PAGE>

            PIMCO StocksPLUS Fund

- --------------------------------------------------------------------------------
                                    Fund Focus          Credit Quality
Principal     Investment Objective  S&P 500 stock       B to Aaa; maximum 10%
Investments   Seeks total           index               below Baa
and           return which          derivatives
Strategies    exceeds that of       backed by a
              the S&P 500           portfolio of        Dividend Frequency
                                    short-term fixed    Declared and
                                    income              distributed quarterly
              Fund Category         securities
              Enhanced Index
              Stock
                                    Average Portfolio
                                    Duration
                                    0-1 year

            The Fund seeks to exceed the total return of the S&P 500 by
            investing under normal circumstances substantially all of its
            assets in S&P 500 derivatives, backed by a portfolio of Fixed
            Income Instruments. The Fund may invest in common stocks, options,
            futures, options on futures and swaps. The Fund uses S&P 500
            derivatives in addition to or in place of S&P 500 stocks to
            attempt to equal or exceed the performance of the S&P 500. The
            value of S&P 500 derivatives closely track changes in the value of
            the index. However, S&P 500 derivatives may be purchased with a
            fraction of the assets that would be needed to purchase the equity
            securities directly, so that the remainder of the assets may be
            invested in Fixed Income Instruments. PIMCO actively manages the
            fixed income assets held by the Fund with a view toward enhancing
            the Fund's total return, subject to an overall portfolio duration
            which is normally not expected to exceed one year.
             The S&P 500 is composed of 500 selected common stocks that
            represent approximately two-thirds of the total market value of
            all U.S. common stocks. The Fund is neither sponsored by nor
            affiliated with S&P. The Fund seeks to remain invested in S&P 500
            derivatives or S&P 500 stocks even when the S&P 500 is declining.
             Though the Fund does not normally invest directly in S&P 500
            securities, when S&P 500 derivatives appear to be overvalued
            relative to the S&P 500, the Fund may invest all of its assets in
            a "basket" of S&P 500 stocks. Individual stocks are selected based
            on an analysis of the historical correlation between the return of
            every S&P 500 stock and the return on the S&P 500 itself. PIMCO
            may employ fundamental analysis of factors such as earnings and
            earnings growth, price to earnings ratio, dividend growth, and
            cash flows to choose among stocks that satisfy the correlation
            tests. Stocks chosen for the Fund are not limited to those with
            any particular weighting in the S&P 500. The Fund also may invest
            in exchange traded funds based on the S&P 500, such as Standard &
            Poor's Depositary Receipts.
             Assets not invested in equity securities or derivatives may be
            invested in Fixed Income Instruments. The Fund may invest up to
            10% of its assets in high yield securities ("junk bonds") rated B
            or higher by Moody's or S&P, or, if unrated, determined by PIMCO
            to be of comparable quality. The Fund may invest up to 20% of its
            assets in securities denominated in foreign currencies and may
            invest beyond this limit in U.S. dollar denominated securities of
            foreign issuers. The Fund 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. In addition, the Fund may
            lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income.

- --------------------------------------------------------------------------------
Principal   Under certain conditions, generally in a market where the value of
Risks       both S&P 500 derivatives and fixed income securities are
            declining, the Fund may experience greater losses than would be
            the case if it invested directly in a portfolio of S&P 500 stocks.
            Among the principal risks of investing in the Fund, which could
            adversely affect its net asset value, yield and total return, are:

              .Market Risk          .Interest Rate Risk   .Mortgage Risk
              .Issuer Risk          .Liquidity Risk       .Leveraging Risk
              .Derivatives Risk     .Foreign Investment
              .Credit Risk           Risk                 .Management Risk
                                    .Currency Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risk of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A Shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/20/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

  Pacific Investment Management Series
25
<PAGE>

            PIMCO StocksPLUS Fund (continued)

            Calendar Year Total Returns -- Class A
                                                    Highest and Lowest
                                                    Quarter Returns
                   [GRAPH]                          (for periods shown
                                                    in the bar chart)
                Annual Return                       --------------------
                                                    Highest (10/1/98-
 94      95      96      97      98      99         12/31/98)     21.23%
- -----  ------  ------  ------  ------  ------       --------------------
2.51%  39.97%  22.59%  32.35%  27.70%  19.49%       Lowest (7/1/98-
                                                    9/30/98)      -9.87%
       Calendar Year End (through 12/31)
            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                              Fund Inception
                                               1 Year 5 Years (5/13/93)(/3/)
         -------------------------------------------------------------------
         <S>                                   <C>    <C>     <C>
         Class A                               15.90% 27.44%  22.00%
         -------------------------------------------------------------------
         Class B                               13.72% 27.12%  21.68%
         -------------------------------------------------------------------
         Class C                               17.94% 27.61%  21.96%
         -------------------------------------------------------------------
         S&P 500 Index(/1/)                    21.04% 28.56%  22.38%
         -------------------------------------------------------------------
         Lipper Growth & Income Fund Avg(/2/)  13.71% 21.35%  16.88%
         -------------------------------------------------------------------
</TABLE>

            (1)  The Standard & Poor's 500 Composite Stock Price Index is an
                 unmanaged index of common stocks. It is not possible to
                 invest directly in the index.
            (2)  The Lipper Growth & Income Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc. that combine a growth-of-earnings orientation
                 and an income requirement for level and/or rising dividends.
                 It does not take into account sales charges.
            (3)  The Fund began operations on 5/13/93. Index comparisons began
                 on 4/30/93.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder Fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         <S>      <C>                                              <C>
         Class A  3%                                               1%(/1/)
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
         ---------------------------------------------------------------------------------------------------------
</TABLE>

            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.40%    0.25%             0.40%         1.05%
         --------------------------------------------------------------------
         Class B      0.40     1.00              0.40          1.80
         --------------------------------------------------------------------
         Class C      0.40     0.75              0.40          1.55
         --------------------------------------------------------------------
</TABLE>

            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                      Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class  Year 1          Year 3          Year 5           Year 10         Year 1 Year 3 Year 5 Year 10
         ----------------------------------------------------------------------------------------------------------
         <S>          <C>             <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A      $404            $624             $862            $1,544          $404   $624   $862    $1,544
         ----------------------------------------------------------------------------------------------------------
         Class B       683             866            1,175             1,822           183    566    975     1,822
         ----------------------------------------------------------------------------------------------------------
         Class C       258             490              845             1,845           158    490    845     1,845
         ----------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              26
<PAGE>

            PIMCO Strategic Balanced Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Intermediate        B to Aaa; maximum 10%
and           total return,         maturity fixed      below Baa
Strategies    consistent with       income
              preservation of       securities and
              capital and           S&P 500 stock       Dividend Frequency
              prudent               index               Declared and
              investment            derivatives         distributed quarterly
              management

                                    Average Portfolio Duration
              Fund Category         0-6 years
              Stock and Bond

            The Fund seeks to achieve its investment objective by normally
            investing in a combination of fixed income securities and equity
            securities or derivatives on equity securities. The percentage of
            the Fund's assets invested in equities and equity derivatives or
            in fixed income securities will be determined based on
            methodology, developed by PIMCO, that forecasts stages in the
            business cycle and considers the risk and reward potential of
            equity and fixed income securities within specific phases of the
            business cycle. The Fund's equity exposure will vary between 45%
            and 75% of assets, and its fixed income exposure will range from a
            minimum of 25% to a maximum of 55%.
             The Fund's equity exposure normally consists of S&P 500
            derivatives, backed by a portfolio of short-term Fixed Income
            Instruments. PIMCO uses S&P 500 derivatives in addition to or in
            place of S&P 500 stocks to attempt to equal or exceed the
            performance of the S&P 500. The value of S&P 500 derivatives
            closely track changes in the value of the index. However, S&P 500
            derivatives may be purchased with a fraction of the assets that
            would be needed to purchase the equity securities directly, so
            that the remainder of the assets may be invested in Fixed Income
            Instruments. PIMCO will actively manage the fixed income assets
            serving as cover for derivatives, as well as any other fixed
            income assets held by the Fund, with a view toward enhancing the
            Fund's total return investment performance. Though the Fund does
            not normally invest directly in S&P 500 securities, when S&P 500
            derivatives appear to be overvalued relative to the S&P 500, the
            Fund may invest the equity portion of its assets in a "basket" of
            S&P 500 stocks.
             The Fund's fixed income exposure will normally consist of a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of the fixed income
            portion of the Fund's assets will normally vary within a three- to
            six-year time frame. The Fixed Income Instruments in which the
            Fund invests are primarily investment grade, but the Fund may
            invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar denominated securities of foreign issuers. The Fund 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.
             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income. The Fund may seek to obtain
            market exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of net income
            earned on the Fund's investments, plus capital appreciation
            arising from increases in the market value of the Fund's holdings.

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

              .Market Risk          .Derivatives Risk     .Mortgage Risk
              .Issuer Risk          .Liquidity Risk       .Leveraging Risk
              .Interest Rate Risk   .Foreign Investment   .Management Risk
                                     Risk

              .Credit Risk          .Currency Risk
            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of broad-based securities market indices and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. Because
            Class A, B and C shares of the Fund do not have any performance
            history, performance information shown in the bar chart and table
            for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.
  Pacific Investment Management Series
27
<PAGE>

            PIMCO Strategic Balanced Fund (continued)

            Calendar Year Total Returns -- Class A

                          [GRAPH]                           Highest and Lowest
                                                            Quarter Returns
                       Annual Return                        (for periods shown
                                                            in the bar chart)
                    97       98      99                     --------------------
                 -------  -------  -------                  Highest (4/1/97-
                  23.69%   19.18%   10.83%                  6/30/97)      12.12%
                                                            --------------------
                                                            Lowest (7/1/98-
                                                            9/30/98)      -4.70%

                       Calendar Year End (through 12/31)

           Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                      <C>                <C>
                                                                     Fund Inception
                                                  1 Year             (6/28/96)(/4/)
            -----------------------------------------------------------------------
         Class A                                   5.85%             16.64%
            -----------------------------------------------------------------------
         Class B                                   5.17%             16.79%
            -----------------------------------------------------------------------
         Class C                                   9.01%             17.31%
            -----------------------------------------------------------------------
         S&P 500 Index(/1/)                       21.04%             27.14%
            -----------------------------------------------------------------------
         S&P 500 and Lehman Aggregate Bond
          Index Blend(/2/)                        12.00%             18.76%
            -----------------------------------------------------------------------
         Lipper Balanced Fund Average(/3/)         8.73%             14.35%
            -----------------------------------------------------------------------
</TABLE>
            (1)  The Standard & Poor's 500 Composite Stock Price Index is an
                 unmanaged index of common stocks. It is not possible to
                 invest directly in the index.
            (2)  The index used for the Fund is a static blend consisting 60%
                 of the S&P 500 Composite Stock Price Index and 40% of The
                 Lehman Brothers Aggregate Bond Index. This blended index
                 reflects the Fund's investment strategy more accurately than
                 the S&P 500 Index. It is not possible to invest directly in
                 the index.
            (3)  The Lipper Balanced Fund Average is a total return
                 performance average of Funds tracked by Lipper Analytical
                 Services, Inc., whose primary objective is to conserve
                 principal by maintaining at all times a balanced portfolio of
                 both stocks and bonds. It does not take into account sales
                 charges.
            (4)  The Fund commenced operations on 6/28/96. Index comparisons
                 begin on 6/30/96.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  4.5%                                             1.0%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5.0%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1.0%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>
            (1)  Imposed only in certain circumstances where Class A shares
                 are purchased without a front-end sales charge at the time of
                 purchase.
            (2)  The maximum CDSC is imposed on shares redeemed in the first
                 year. For shares held longer than one year, the CDSC declines
                 according to the schedule set forth under "Investment
                 Options--Class A, B and C Shares--Contingent Deferred Sales
                 Charges (CDSCs)--Class B Shares."
            (3)  The CDSC on Class C shares is imposed only on shares redeemed
                 in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         Class A      0.40%    0.25%             0.40%         1.05%
            -----------------------------------------------------------------
         Class B      0.40     1.00              0.40          1.80
            -----------------------------------------------------------------
         Class C      0.40     1.00              0.40          1.80
            -----------------------------------------------------------------
</TABLE>
            (1)  Due to the 12b-1 distribution fee imposed on Class B and
                 Class C shares, a Class B or Class C shareholder may,
                 depending upon the length of time the shares are held, pay
                 more than the economic equivalent of the maximum front-end
                 sales charges permitted by relevant rules of the National
                 Association of Securities Dealers, Inc.
            (2)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 do not
                      Example: Assuming you redeem shares at the end of each period    redeem your shares
         Share Class  Year 1          Year 3          Year 5           Year 10         Year 1 Year 3 Year 5 Year 10
            -------------------------------------------------------------------------------------------------------
         <S>          <C>             <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Class A      $552            $769            $1,003           $1,675          $552   $769   $1,003  $1,675
            -------------------------------------------------------------------------------------------------------
         Class B       683             866             1,175            1,822           183    566      975   1,822
            -------------------------------------------------------------------------------------------------------
         Class C       283             566               975            2,116           183    566      975   2,116
            -------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              28
<PAGE>

            PIMCO Total Return Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Intermediate        B to Aaa;
and           total return,         maturity fixed      maximum 10%
Strategies    consistent with       income              below Baa
              preservation of       securities
              capital and                               Dividend Frequency
              prudent               Average Portfolio   Declared daily and
              investment            Duration            distributed monthly
              management            3-6 years

              Fund Category
              Intermediate Duration Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

             .Interest Rate Risk    .Derivatives Risk         .Currency Risk
             .Credit Risk           .Liquidity Risk           .Leveraging Risk
             .Market Risk           .Mortgage Risk            .Management Risk
             .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.
- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (1/13/97), performance information shown in the bar chart and
            table for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of
            future results.

  Pacific Investment Management Series
29
<PAGE>

            PIMCO Total Return Fund (continued)

            Calendar Year Total Returns -- Class A

              [GRAPH]

           Annual Return

  90     91       92     93      94      Highest and Lowest Quarter Returns
- -----  ------   -----  ------  ------    (for periods shown in the bar chart)
7.54%  19.02%   9.26%  12.05%  -4.02%    ------------------------------------
                                         Highest (10/1/91-
  95       96      97     98      99     12/31/91)                      6.54%
- ------   -----   -----   -----  ------   ------------------------------------
19.23%   4.22%   9.65%   9.25%  -0.75%   Lowest (1/1/94-3/31/94)       -2.80%

                       Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                 1 Year     5 Years     10 Years
         -----------------------------------------------------------------------
         <S>                                     <C>        <C>         <C>
         Class A                                 -5.21%     7.13%       7.81%
         -----------------------------------------------------------------------
         Class B                                 -6.18%     7.02%       7.77%
         -----------------------------------------------------------------------
         Class C                                 -2.43%     7.33%       7.53%
         -----------------------------------------------------------------------
         Lehman Aggregate Bond Index(/1/)        -0.82%     7.73%       7.70%
         -----------------------------------------------------------------------
         Lipper Intermediate Investment Grade
          Debt Fund Avg(/2/)                     -1.31%     6.79%       7.09%
         -----------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Lipper Intermediate Investment Grade Debt Fund Average is
                a total return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of five to ten
                years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
<CAPTION>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
         ---------------------------------------------------------------------------------------------------------
         <S>      <C>                                              <C>
         Class A  4.5%                                             1.0%(/1/)
         ---------------------------------------------------------------------------------------------------------
         Class B  None                                             5.0%(/2/)
         ---------------------------------------------------------------------------------------------------------
         Class C  None                                             1.0%(/3/)
         ---------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (2) The maximum CDSC is imposed on shares redeemed in the first
                year. For shares held longer than one year, the CDSC declines
                according to the schedule set forth under "Investment
                Options--Class A, B and C Shares--Contingent Deferred Sales
                Charges (CDSCs)--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

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

<TABLE>
<CAPTION>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
         --------------------------------------------------------------------
         <S>          <C>      <C>               <C>           <C>
         Class A      0.25%    0.25%             0.40%         0.90%
         --------------------------------------------------------------------
         Class B      0.25     1.00              0.40          1.65
         --------------------------------------------------------------------
         Class C      0.25     1.00              0.40          1.65
         --------------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and
                Class C shares, a Class B or Class C shareholder may,
                depending upon the length of time the shares are held, pay
                more than the economic equivalent of the maximum front-end
                sales charges permitted by relevant rules of the National
                Association of Securities Dealers, Inc.
            (2) Other Expenses reflects a 0.40% Administrative Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A, B or C shares of the Fund with the costs
            of investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 shares  Example: Assuming you do not
                      at the end of each period            redeem your shares
         Share Class  Year 1   Year 3   Year 5   Year 10   Year 1 Year 3 Year 5 Year 10
         ------------------------------------------------------------------------------
         <S>          <C>      <C>      <C>      <C>       <C>    <C>    <C>    <C>
         Class A      $538     $724      $926    $1,508    $538   $724   $926   $1,508
         ------------------------------------------------------------------------------
         Class B       668      820     1,097     1,657     168    520    897    1,657
         ------------------------------------------------------------------------------
         Class C       268      520       897     1,955     168    520    897    1,955
         ------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              30
<PAGE>


            Summary of Principal Risks

            The value of your investment in a Fund changes with the values of
            that Fund's investments. Many factors can affect those values. The
            factors that are most likely to have a material effect on a
            particular Fund's portfolio as a whole are called "principal
            risks." The principal risks of each Fund are identified in the
            Fund Summaries and are described in this section. Each Fund may be
            subject to additional principal risks and risks other than those
            described below because the types of investments made by a Fund
            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 Funds, their
            investments and the related risks. There is no guarantee that the
            Fund will be able to achieve its investment objective.

Interest    As interest rates rise, the value of fixed income securities held
Rate Risk   by a Fund 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.

Credit      A Fund could lose money if the issuer or guarantor of a fixed
Risk        income security, or the counterparty to a derivatives contract,
            repurchase agreement or a 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        Funds that invest in high yield securities and unrated securities
Yield       of similar credit quality (commonly known as "junk bonds") may be
Risk        subject to greater levels of interest rate, credit and liquidity
            risk than Funds that do not invest in such securities. High yield
            securities are considered predominately 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 a Fund's ability to sell its high yield securities
            (liquidity risk).

Market      The market price of securities owned by a Fund may go up or down,
Risk        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. Equity securities
            generally have greater price volatility than fixed income
            securities.

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

Liquidity   Liquidity risk exists when particular investments are difficult to
Risk        purchase or sell. A Fund's investments in illiquid securities may
            reduce the returns of the Fund because it may be unable to sell
            the illiquid securities at an advantageous time or price. Funds
            with principal investment strategies that involve foreign
            securities, derivatives or securities with substantial market
            and/or credit risk tend to have the greatest exposure to liquidity
            risk.

Derivatives Derivatives are financial contracts whose value depends on, or is
Risk        derived from, the value of an underlying asset, reference rate or
            index. The various derivative instruments that the Funds 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 and
            Policies" in the Statement of Additional Information. The Funds
            typically use derivatives as a substitute for taking a position in
            the underlying asset and/or as part of a strategy designed to
            reduce exposure to other risks, such as interest rate or currency
            risk. The Funds may also use derivatives for leverage, in which
            case their use would involve leveraging risk. A Fund's use of
            derivative instruments involves risks different from, or possibly
            greater than, the risks associated with investing directly in
            securities and other

  Pacific Investment Management Series
31
<PAGE>

            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
            Fund 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 Fund will engage in these transactions to reduce
            exposure to other risks when that would be beneficial.

Mortgage    A Fund that purchases mortgage-related securities is subject to
Risk        certain additional risks. Rising interest rates tend to extend the
            duration of mortgage-related securities, making them more
            sensitive to changes in interest rates. As a result, in a period
            of rising interest rates, a Fund that holds mortgage-related
            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 a Fund because the Fund will have to reinvest that
            money at the lower prevailing interest rates.

Foreign     A Fund that invests in foreign securities may experience more
(Non-       rapid and extreme changes in value than a Fund that invests
U.S.)       exclusively in securities of U.S. companies. The securities
Investment  markets of many foreign countries are relatively small, with a
Risk        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 a Fund's investments in a
            foreign country. In the event of nationalization, expropriation or
            other confiscation, a Fund 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 a Fund invests a
            significant portion of its assets in a concentrated geographic
            area like Eastern Europe or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments.

Emerging    Foreign investment risk may be particularly high to the extent
Markets     that a Fund invests in emerging market securities of issuers based
Risks       in countries with developing economies. 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    Funds that invest directly in foreign currencies or in securities
Risk        that trade in, and receive revenues in, foreign (non-U.S.)
            currencies are 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, or by the imposition of currency
            controls or other political developments in the U.S. or abroad. As
            a result, the Fund's investments in foreign currency-denominated
            securities may reduce the returns of the Fund.

Issuer Non- Focusing investments in a small number of issuers, industries or
Diversifi-  foreign currencies increases risk. Funds that are "non-
cation      diversified" may invest a greater percentage of their assets in
Risk        the securities of a single issuer than Funds that are
            "diversified." Funds 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. Similarly, a Fund may
            be more sensitive to adverse economic, business or political
            developments if it invests a substantial portion of its assets in
            the bonds of similar projects or from issuers in a single state.

Leveraging  Certain transactions may give rise to a form of leverage. Such
Risk        transactions may include, among others, reverse repurchase
            agreements, loans of portfolios securities, and the use 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 Fund 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, may
            cause a Fund to be more volatile than if the Fund had not been
            leveraged. This is because leverage tends to exaggerate the effect
            of any increase or decrease in the value of a Fund's portfolio
            securities.
                                                                   Prospectus
                                                                              32
<PAGE>

Smaller     The general risks associated with fixed income securities are
Company     particularly pronounced for securities issued by companies with
Risk        smaller market capitalizations. These companies may have limited
            product lines, markets or financial resources or they 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  Each Fund is subject to management risk because it is an actively
Risk        managed investment portfolio. PIMCO and each individual portfolio
            manager will apply investment techniques and risk analyses in
            making investment decisions for the Funds, but there can be no
            guarantee that these will produce the desired results.

            Management of the Funds

Investment  PIMCO serves as the investment adviser and the administrator
Adviser     (serving in its capacity as administrator, the "Administrator")
and Admini- for the Funds. Subject to the supervision of the Board of
strator     Trustees, PIMCO is responsible for managing the investment
            activities of the Funds and the Funds' business affairs and other
            administrative matters.

             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.

Advisory    Each Fund pays PIMCO fees in return for providing investment
Fees        advisory services. For the fiscal year ended March 31, 1999, the
            Funds paid monthly advisory fees to PIMCO at the following annual
            rates (stated as a percentage of the average daily net assets of
            each Fund taken separately):

            Fund                                             Advisory Fees
            -------------------------------------------------------------------

            Money Market Fund                                    0.15%
            Foreign Bond, Global Bond II, High Yield, Long-
             Term U.S. Government, Low Duration,
             Real Return Bond, Short-Term, and Total Return
             Funds                                               0.25%
            StocksPLUS and Strategic Balanced Funds              0.40%
            Emerging Markets Bond Fund                           0.45%

             The Convertible Fund was not operational during the fiscal year
            ended March 31, 1999. The investment advisory fee for the
            Convertible Fund is at an annual rate of 0.40% based upon the
            average daily net assets of the Fund.

Administra- Each Fund pays for the administrative services it requires under a
tive Fees   fee structure which is essentially fixed. Class A, Class B and
            Class C shareholders of each Fund pay an administrative fee to
            PIMCO, computed as a percentage of the Fund's assets attributable
            in the aggregate to that class of shares. PIMCO, in turn, provides
            or procures administrative services for Class A, Class B and Class
            C shareholders and also bears the costs of various third-party
            services required by the Funds, including audit, custodial,
            portfolio accounting, legal, transfer agency and printing costs.
            The result of this fee structure is an expense level for Class A,
            Class B and Class C shareholders of each Fund that, with limited
            exceptions, is precise and predictable under ordinary
            circumstances.

             For the fiscal year ended March 31, 1999, the Funds paid PIMCO
            monthly administrative fees at the following annual rates (stated
            as a percentage of the average daily net assets attributable in
            the aggregate to the Fund's Class A, Class B and Class C shares):

            Fund                                        Administrative Fees
            ----------------------------------------------------------------

            Money Market and Short-Term Funds                  0.35%
            High Yield, Long-Term U.S. Government, Low
             Duration, Real Return Bond, StocksPLUS,
             Strategic Balanced and Total Return Funds         0.40%
            Foreign Bond and Global Bond II Funds              0.45%
            Emerging Markets Bond Fund                         0.55%

  Pacific Investment Management Series
33
<PAGE>

             The Convertible Fund was not operational during the fiscal year
            ended March 31, 1999. The administrative fee for the Convertible
            Fund is at an annual rate of 0.40% based upon the average daily
            net assets of the Fund.


Individual  The following individuals have primary responsibility for managing
Portfolio   each of the noted Funds.
Managers


<TABLE>
<CAPTION>
                                                           Recent Professional
         Fund                  Portfolio Manager    Since  Experience
            -----------------------------------------------------------------------
         <C>                   <C>                  <C>    <S>
         Convertible           Sandra K. Durn        4/99* Senior Vice President,
                                                           PIMCO. She joined PIMCO
                                                           as a Portfolio Manager
                                                           in 1999. Prior to
                                                           joining PIMCO in 1999,
                                                           she was associated with
                                                           Nicholas-Applegate
                                                           Capital Management where
                                                           she was a Convertible
                                                           Securities Portfolio
                                                           Manager from 1995 to
                                                           1999, and a Quantitative
                                                           Analyst since 1994.

         Emerging Markets      Mohamed A. El-Erian   8/99  Managing Director,
         Bond                                              PIMCO. He joined PIMCO
                                                           as a Portfolio Manager
                                                           in 1999. Prior to
                                                           joining PIMCO, he was a
                                                           Managing Director from
                                                           1998-1999 for Salomon
                                                           Smith Barney/Citibank
                                                           where he was head of
                                                           emerging markets
                                                           research. Prior to that
                                                           he was associated with
                                                           the International
                                                           Monetary Fund as a
                                                           Deputy Director and
                                                           Advisor from 1983-1998.

         Foreign Bond          Lee R. Thomas, III    7/95  Managing Director and
         Global Bond II                             10/95* Senior International
                                                           Portfolio Manager,
                                                           PIMCO. He joined PIMCO
                                                           as a Portfolio Manager
                                                           in 1995, and has managed
                                                           fixed income accounts
                                                           for various
                                                           institutional clients
                                                           and funds since that
                                                           time. Prior to joining
                                                           PIMCO, he was associated
                                                           with Investcorp as a
                                                           member of the management
                                                           committee responsible
                                                           for global securities
                                                           and foreign exchange
                                                           trading.

         High Yield            Benjamin L. Trosky   12/92* Managing Director,
                                                           PIMCO. He joined PIMCO
                                                           as a Portfolio Manager
                                                           in 1990, and has managed
                                                           fixed income accounts
                                                           for various
                                                           institutional clients
                                                           and funds since that
                                                           time.

         Long-Term U.S.        James M. Keller       4/00  Executive Vice
         Government                                        President, PIMCO. He
                                                           joined PIMCO as a
                                                           Portfolio Manager in
                                                           1996, and has managed
                                                           fixed income accounts
                                                           for various
                                                           institutional clients
                                                           since that time.

         Low Duration          William H. Gross      5/87* Managing Director, Chief
                                                           Investment Officer and a
                                                           founding partner of
                                                           PIMCO.

         Money Market          Paul A. McCulley     11/99  Executive Vice
                                                           President, PIMCO. He has
                                                           managed fixed income
                                                           assets since joining
                                                           PIMCO in 1999. Prior to
                                                           joining PIMCO, Mr.
                                                           McCulley was associated
                                                           with Warburg Dillion
                                                           Read as a Managing
                                                           Director from 1992-1999
                                                           and Head of Economic and
                                                           Strategy Research for
                                                           the Americas from 1995-
                                                           1999, where he managed
                                                           macro research
                                                           world-wide.

         Real Return Bond      John B. Brynjolfsson  1/97* Executive Vice
                                                           President, PIMCO. He
                                                           joined PIMCO as a
                                                           Portfolio Manager in
                                                           1989, and has managed
                                                           fixed income accounts
                                                           for various
                                                           institutional clients
                                                           and funds since that
                                                           time.

         Short-Term            Paul A. McCulley      8/99  Executive Vice
                                                           President, PIMCO. He has
                                                           managed fixed income
                                                           assets since joining
                                                           PIMCO in 1999. Prior to
                                                           joining PIMCO, Mr.
                                                           McCulley was associated
                                                           with Warburg Dillion
                                                           Read as a Managing
                                                           Director from 1992-1999
                                                           and Head of Economic and
                                                           Strategy Research for
                                                           the Americas from 1995-
                                                           1999, where he managed
                                                           macro research
                                                           world-wide.

         StocksPLUS            William H. Gross      1/98  Managing Director, Chief
         Strategic Balanced                          1/98  Investment Officer and a
         Total Return                                5/87* founding partner of
                                                           PIMCO. He
                                                           leads a team which
                                                           manages the Strategic
                                                           Balanced and StocksPLUS
                                                           Funds.
</TABLE>
            -------
            * Since inception of the Fund.

Distributor The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors L.P. The Distributor, located
            at 2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.

                                                                   Prospectus 34
<PAGE>

            Investment Options--Class A, B and C Shares

            The Trust offers investors Class A, Class B and Class C shares of
            each Fund in this Prospectus. Each class of shares is subject to
            different types and levels of sales charges than the other classes
            and bears a different level of expenses.

             The class of shares that is best for you depends upon a number of
            factors, including the amount and the intended length of your
            investment. The following summarizes key information about each
            class to help you make your investment decision, including the
            various expenses associated with each class. More extensive
            information about the Trust's multi-class arrangements is included
            in the PIMCO Funds Shareholders' Guide for Class A, B and C Shares
            (the "Guide"), which is included as part of the Statement of
            Additional Information and can be obtained free of charge from the
            Distributor. See "How to Buy and Sell Shares--PIMCO Funds
            Shareholders' Guide" below.

Class A     .  You pay an initial sales charge when you buy Class A shares of
Shares         any Fund except the Money Market Fund. The maximum initial
               sales charge is 2.00% for the Short-Term Fund, 3.00% for the
               Low Duration, Real Return Bond and StocksPLUS Funds and 4.50%
               for all other Funds. The sales charge is deducted from your
               investment so that not all of your purchase payment is
               invested.

            .  You may be eligible for a reduction or a complete waiver of the
               initial sales charge under a number of circumstances. For
               example, you normally pay no sales charge if you purchase
               $1,000,000 or more of Class A shares. Please see the Guide for
               details.

            .  Class A shares are subject to lower 12b-1 fees than Class B or
               Class C shares. Therefore, Class A shareholders generally pay
               lower annual expenses and receive higher dividends than Class B
               or Class C shareholders.

            .  You normally pay no contingent deferred sales charge ("CDSC")
               when you redeem Class A shares, although you may pay a 1% CDSC
               if you purchase $1,000,000 or more of Class A shares (and
               therefore pay no initial sales charge) and then redeem the
               shares during the first 18 months after your initial purchase.
               The Class A CDSC is waived for certain categories of investors
               and does not apply if you are otherwise eligible to purchase
               Class A shares without a sales charge. Please see the Guide for
               details.

Class B     .  You do not pay an initial sales charge when you buy Class B
Shares         shares. The full amount of your purchase payment is invested
               initially. Class B shares of the Money Market and Short-Term
               Funds are not offered for initial purchase but may be obtained
               through exchanges of Class B shares of other Funds.

            .  You normally pay a CDSC of up to 5% if you redeem Class B
               shares during the first six years after your initial purchase.
               The amount of the CDSC declines the longer you hold your Class
               B shares. You pay no CDSC if you redeem during the seventh year
               and thereafter. The Class B CDSC is waived for certain
               categories of investors. Please see the Guide for details.

            .  Class B shares are subject to higher 12b-1 fees than Class A
               shares for the first seven years they are held. During this
               time, Class B shareholders normally pay higher annual expenses
               and receive lower dividends than Class A shareholders.

            .  Class B shares automatically convert into Class A shares after
               they have been held for seven years. After the conversion takes
               place, the shares are subject to the lower 12b-1 fees paid by
               Class A shares.

Class C     .  You do not pay an initial sales charge when you buy Class C
Shares         shares. The full amount of your purchase payment is invested
               initially.

            .  You normally pay a CDSC of 1% if you redeem Class C shares
               during the first year after your initial purchase. The Class C
               CDSC is waived for certain categories of investors. Please see
               the Guide for details.

            .  Class C shares are subject to higher 12b-1 fees than Class A
               shares. Therefore, Class C shareholders normally pay higher
               annual expenses and receive lower dividends than Class A
               shareholders.

            .  Class C shares do not convert into any other class of shares.
               Because Class B shares convert into Class A shares after seven
               years, Class C shares will normally be subject to higher
               expenses and will pay lower dividends than Class B shares if
               the shares are held for more than seven years.
  Pacific Investment Management Series
35
<PAGE>

            The following provides additional information about the sales
            charges and other expenses associated with Class A, Class B and
            Class C shares.

- --------------------------------------------------------------------------------
Initial     Unless you are eligible for a waiver, the public offering price
Sales       you pay when you buy Class A shares of the Funds is the net asset
Charges--   value ("NAV") of the shares plus an initial sales charge. The
Class A     initial sales charge varies depending upon the size of your
Shares      purchase, as set forth below. No sales charge is imposed where
            Class A shares are issued to you pursuant to the automatic
            reinvestment of income dividends or capital gains distributions.

- --------------------------------------------------------------------------------
<TABLE>
         <S>                     <C>                       <C>
Short-                           Initial Sales Charge      Initial Sales Charge
Term     Amount of               as % of Net               as % of Public
Fund     Purchase                Amount Invested           Offering Price
            -------------------------------------------------------------------
         $0-$49,999              2.04%                     2.00%
            -------------------------------------------------------------------
         $50,000-$99,999         1.78%                     1.75%
            -------------------------------------------------------------------
         $100,000-$249,999       1.52%                     1.50%
            -------------------------------------------------------------------
         $250,000 +              0.00%*                    0.00%*
            -------------------------------------------------------------------

- -------------------------------------------------------------------------------
Low                              Initial Sales Charge      Initial Sales Charge
Dura-    Amount of               as % of Net               as % of Public
tion,    Purchase                Amount Invested           Offering Price
Real        -------------------------------------------------------------------
Return   $0-$49,999              3.09%                     3.00%
Bond        -------------------------------------------------------------------
and      $50,000-$99,999         2.56%                     2.50%
Stocks-     -------------------------------------------------------------------
PLUS     $100,000-$249,999       2.04%                     2.00%
Funds       -------------------------------------------------------------------
         $250,000-$499,999       1.52%                     1.50%
            -------------------------------------------------------------------
         $500,000-$999,999       1.27%                     1.25%
            -------------------------------------------------------------------
         $1,000,000 +            0.00%*                    0.00%*
            -------------------------------------------------------------------

- -------------------------------------------------------------------------------
All                              Initial Sales Charge      Initial Sales Charge
Other    Amount of               as % of Net               as % of Public
Funds    Purchase                Amount Invested           Offering Price
(except     -------------------------------------------------------------------
Money    $0-$49,999              4.71%                     4.50%
Market      -------------------------------------------------------------------
Fund)    $50,000-$99,999         4.17%                     4.00%
            -------------------------------------------------------------------
         $100,000-$249,999       3.63%                     3.50%
            -------------------------------------------------------------------
         $250,000-$499,999       2.56%                     2.50%
            -------------------------------------------------------------------
         $500,000-$999,999       2.04%                     2.00%
            -------------------------------------------------------------------
         $1,000,000 +            0.00%*                    0.00%*
            -------------------------------------------------------------------

            *As shown, investors that purchase $1,000,000 or more of any
            Fund's Class A shares ($250,000 in the case of the Short-Term
            Fund) will not pay any initial sales charge on the purchase.
            However, purchasers of $1,000,000 or more of Class A shares
            ($250,000 in the case of the Short-Term Fund) may be subject to a
            CDSC of 1% if the shares are redeemed during the first 18 months
            after their purchase. See "CDSCs on Class A Shares" below.

- -------------------------------------------------------------------------------
Contingent  Unless you are eligible for a waiver, if you sell (redeem) your
Deferred    Class B or Class C shares within the time periods specified below,
Sales       you will pay a CDSC according to the following schedules.
Charges
(CDSCs)--
Class B
and Class
C Shares

- -------------------------------------------------------------------------------
Class B  Years Since Purchase    Percentage Contingent
Shares   Payment was Made        Deferred Sales Charge
            -------------------------------------------------------------------
         First                   5
            -------------------------------------------------------------------
         Second                  4
            -------------------------------------------------------------------
         Third                   3
            -------------------------------------------------------------------
         Fourth                  3
            -------------------------------------------------------------------
         Fifth                   2
            -------------------------------------------------------------------
         Sixth                   1
            -------------------------------------------------------------------
         Seventh                 0*
            -------------------------------------------------------------------
</TABLE>


            *After the seventh year, Class B shares convert into Class A
            shares.
                                                                   Prospectus
                                                                              36
<PAGE>



<TABLE>
            <S>                              <C>
Class C     Years Since Purchase             Percentage Contingent
Shares      Payment was Made                 Deferred Sales Charge
            -----------------------------------------------------------------------------
            First                            1
            -----------------------------------------------------------------------------
            Thereafter                       0
            -----------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
CDSCs on    Unless a waiver applies, investors who purchase $1,000,000
Class A     ($250,000 in the case of the Short-Term Fund) or more of Class A
Shares      shares (and, thus, pay no initial sales charge) of a Fund other
            than the Money Market Fund will be subject to a 1% CDSC if the
            shares are redeemed within 18 months of their purchase. The Class
            A CDSC does not apply if you are otherwise eligible to purchase
            Class A shares without an initial sales charge or are eligible for
            a waiver of the CDSC. See "Reductions and Waivers of Initial Sales
            Charges and CDSCs" below. The Class A CDSC does not apply to the
            Money Market Fund; however, if Money Market Fund Class A shares
            are purchased in an amount that for any other Fund would be
            subject to a CDSC and are subsequently exchanged for shares of
            another Fund, a Class A CDSC will apply for 18 months from the
            date of the exchange.

- --------------------------------------------------------------------------------
How CDSCs   A CDSC is imposed on redemptions of Class B and Class C shares
are         (and where applicable, Class A shares) on the amount of the
Calculated  redemption which causes the current value of your account for the
            particular class of shares of a Fund to fall below the total
            dollar amount of your purchase payments subject to the CDSC.
            However, no CDSC is imposed if the shares redeemed have been
            acquired through the reinvestment of dividends or capital gains
            distributions or if the amount redeemed is derived from increases
            in the value of your account above the amount of the purchase
            payments subject to the CDSC. CDSCs are deducted from the proceeds
            of your redemption, not from amounts remaining in your account. In
            determining whether a CDSC is payable, it is assumed that the
            purchase payment from which the redemption is made is the earliest
            purchase payment for the particular class of shares in your
            account (from which a redemption or exchange has not already been
            effected).

             For instance, the following example illustrates the operation of
            the Class B CDSC:

              .  Assume that an individual opens an account and makes a
                 purchase payment of $10,000 for Class B shares of a Fund and
                 that six months later the value of the investor's account for
                 that Fund has grown through investment performance and
                 reinvestment of distributions to $11,000. The investor then
                 may redeem up to $1,000 from that Fund ($11,000 minus
                 $10,000) without incurring a CDSC. If the investor should
                 redeem $3,000, a CDSC would be imposed on $2,000 of the
                 redemption (the amount by which the investor's account for
                 the Fund was reduced below the amount of the purchase
                 payment). At the rate of 5%, the Class B CDSC would be $100.

             In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all
            shares of a particular class of a Fund in the shareholder's
            account are aggregated, and the current value of all such shares
            is aggregated.

- --------------------------------------------------------------------------------
Reductions  The initial sales charges on Class A shares and the CDSCs on Class
and         A, Class B and Class C shares may be reduced or waived under
Waivers     certain purchase arrangements and for certain categories of
of          investors. Please see the Guide for details. The Guide is
Initial     available free of charge from the Distributor. See "How to Buy and
Sales       Sell Shares--PIMCO Funds Shareholders' Guide" below.
Charges
and CDSCs

- --------------------------------------------------------------------------------
Distri-     The Funds pay fees to the Distributor on an ongoing basis as
bution and  compensation for the services the Distributor renders and the
Servicing   expenses it bears in connection with the sale and distribution of
(12b-1)     Fund shares ("distribution fees") and/or in connection with
Plans       personal services rendered to Fund shareholders and the
            maintenance of shareholder accounts ("servicing fees"). These
            payments are made pursuant to Distribution and Servicing Plans
            ("12b-1 Plans") adopted by each Fund pursuant to Rule 12b-1 under
            the Investment Company Act of 1940.

             There is a separate 12b-1 Plan for each class of shares offered
            in this Prospectus. Class A shares pay only servicing fees. Class
            B and Class C shares pay both distribution and servicing fees. The
            following lists the maximum annual rates at which the distribution
            and/or servicing fees may be paid under each 12b-1 Plan
            (calculated as a percentage of each Fund's average daily net
            assets attributable to the particular class of shares):

<TABLE>
            <S>                              <C>                                   <C>
                                             Servicing                             Distribution
            Class A                          Fee                                   Fee
            --------------------------------------------------------------------------------
            Money Market Fund                0.10%                                 0.00%
            --------------------------------------------------------------------------------
            All other Funds                  0.25%                                 0.00%
            --------------------------------------------------------------------------------
            Class B
            --------------------------------------------------------------------------------
            All Funds                        0.25%                                 0.75%
            --------------------------------------------------------------------------------
</TABLE>
  Pacific Investment Management Series
37
<PAGE>

<TABLE>
         <S>                                          <C>                             <C>
            Class C
            -------------------------------------------------------------------------------
            Money Market Fund                            0.10%                        0.00%
            -------------------------------------------------------------------------------
            Short-Term Fund                              0.25%                        0.30%
            -------------------------------------------------------------------------------
            Low Duration, Real Return Bond
             and StocksPLUS Funds                        0.25%                        0.50%
            -------------------------------------------------------------------------------
            All other Funds                              0.25%                        0.75%
            -------------------------------------------------------------------------------
</TABLE>

             Because 12b-1 fees are paid out of a Fund's assets on an ongoing
            basis, over time these fees will increase the cost of your
            investment and may cost you more than sales charges which are
            deducted at the time of investment. Therefore, although Class B
            and Class C shares do not pay initial sales charges, the
            distribution fees payable on Class B and Class C shares may, over
            time, cost you more than the initial sales charge imposed on Class
            A shares. Also, because Class B shares convert into Class A shares
            after they have been held for seven years and are not subject to
            distribution fees after the conversion, an investment in Class C
            shares may cost you more over time than an investment in Class B
            shares.

            How Fund Shares Are Priced

             The net asset value ("NAV") of a Fund's Class A, Class B and
            Class C shares is determined by dividing the total value of a
            Fund's portfolio investments and other assets attributable to that
            class, less any liabilities, by the total number of shares
            outstanding of that class.

             Except for the Money Market Fund, for purposes of calculating
            NAV, 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.

             The Money Market Fund's securities are valued using the amortized
            cost method of valuation, which involves valuing a security at
            cost on the date of acquisition and thereafter assuming a constant
            accretion of a discount or amortization of a premium to maturity,
            regardless of the impact of fluctuating interest rates on the
            market value of the instrument. While this method provides
            certainty in valuation, it may result in periods during which
            value, as determined by amortized cost, is higher or lower than
            the price the Fund would receive if it sold the instrument.

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

             Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time) (the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Funds normally use pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Funds or its agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Funds 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 the NYSE
            Close.

                                                                   Prospectus
                                                                              38
<PAGE>

            How to Buy and Sell Shares

            The following section provides basic information about how to buy,
            sell (redeem) and exchange shares of the Funds.

PIMCO       More detailed information about the Trust's purchase, sale and
Funds       exchange arrangements for Fund shares is provided in the PIMCO
Share-      Funds Shareholders' Guide, which is included in the Statement of
holders'    Additional Information and can be obtained free of charge from the
Guide       Distributor by written request or by calling 1-800-426-0107. The
            Guide provides technical information about the basic arrangements
            described below and also describes special purchase, sale and
            exchange features and programs offered by the Trust, including:

              . Automated telephone and wire transfer procedures
              . Automatic purchase, exchange and withdrawal programs
              . Programs that establish a link from your Fund account to your
                bank account
              . Special arrangements for tax-qualified retirement plans
              . Investment programs which allow you to reduce or eliminate the
                initial sales charges on Class A shares
              . Categories of investors that are eligible for waivers or
                reductions of initial sales charges and CDSCs

Calculation When you buy shares of the Funds, you pay a price equal to the NAV
of Share    of the shares, plus any applicable sales charge. When you sell
Price and   (redeem) shares, you receive an amount equal to the NAV of the
Redemption  shares, minus any applicable CDSC. NAVs are determined at the
Payments    close of regular trading (normally 4:00 p.m., Eastern time) on
            each day the New York Stock Exchange is open. See "How Fund Shares
            Are Priced" above for details. Generally, purchase and redemption
            orders for Fund shares are processed at the NAV next calculated
            after your order is received by the Distributor. There are certain
            exceptions where an order is received by a broker or dealer prior
            to the close of regular trading on the New York Stock Exchange and
            then transmitted to the Distributor after the NAV has been
            calculated for that day (in which case the order may be processed
            according to that day's NAV). Please see the Guide for details.

             The Trust does not calculate NAVs or process orders on days when
            the New York Stock Exchange is closed. If your purchase or
            redemption order is received by the Distributor on a day when the
            New York Stock Exchange is closed, it will be processed on the
            next succeeding day when the New York Stock Exchange is open
            (according to the succeeding day's NAV).

Buying      You can buy Class A, Class B or Class C shares of the Funds in the
Shares      following ways:

              . Through your broker, dealer or other financial intermediary.
                Your broker, dealer or other intermediary may establish higher
                minimum investment requirements than the Trust and may also
                independently charge you transaction fees and additional
                amounts (which may vary) in return for its services, which
                will reduce your return. Shares you purchase through your
                broker, dealer or other intermediary will normally be held in
                your account with that firm.

              . Directly from the Trust. To make direct investments, you must
                open an account with the Distributor and send payment for your
                shares either by mail or through a variety of other purchase
                options and plans offered by the Trust.

             If you wish to invest directly by mail, please send a check
            payable to PIMCO Funds Distributors LLC, along with a completed
            application form to:

                PIMCO Funds Distributors LLC
                P.O. Box 9688
                Providence, RI 02940-0926

             The Trust accepts all purchases by mail subject to collection of
            checks at full value and conversion into federal funds. You may
            make subsequent purchases by mailing a check to the address above
            with a letter describing the investment or with the additional
            investment portion of a confirmation statement. Checks for
            subsequent purchases should be payable to PIMCO Funds Distributors
            LLC and should clearly indicate your account number. Please call
            the Distributor at 1-800-426-0107 if you have any questions
            regarding purchases by mail.

             The Guide describes a number of additional ways you can make
            direct investments, including through the PIMCO Funds Auto-Invest
            and PIMCO Funds Fund Link programs. You can obtain a

  Pacific Investment Management Series
39
<PAGE>

            Guide free of charge from the Distributor by written request or by
            calling 1-800-426-0107. See "PIMCO Funds Shareholders' Guide"
            above.

             The Distributor, in its sole discretion, may accept or reject any
            order for purchase of Fund shares. No share certificates will be
            issued unless specifically requested in writing.

             Investment Minimums. The following investment minimums apply for
            purchases of Class A, Class B and Class C shares.

<TABLE>
<CAPTION>
                     Initial Investment                 Subsequent Investments
                     ------------------                 ----------------------
                     <S>                                <C>
                     $2,500 per Fund                        $100 per Fund
</TABLE>

             Lower minimums may apply for certain categories of investors,
            including certain tax-qualified retirement plans, and for special
            investment programs and plans offered by the Trust, such as the
            PIMCO Funds Auto-Invest and PIMCO Funds Fund Link programs. Please
            see the Guide for details.

Small       Because of the disproportionately high costs of servicing accounts
Account     with low balances, if you have a direct account with the
Fee         Distributor, you will be charged a fee at the annual rate of $16
            if your account balance for any Fund falls below a minimum level
            of $2,500. However, you will not be charged this fee if the
            aggregate value of all of your PIMCO Funds accounts is at least
            $50,000. Any applicable small account fee will be deducted
            automatically from your below-minimum Fund account in quarterly
            installments and paid to the Administrator. Each Fund account will
            normally be valued, and any deduction taken, during the last five
            business days of each calendar quarter. Lower minimum balance
            requirements and waivers of the small account fee apply for
            certain categories of investors. Please see the Guide for details.

Minimum     Due to the relatively high cost to the Funds of maintaining small
Account     accounts, you are asked to maintain an account balance in each
Size        Fund in which you invest of at least the minimum investment
            necessary to open the particular type of account. If your balance
            for any Fund remains below the minimum for three months or longer,
            the Administrator has the right (except in the case of employer-
            sponsored retirement accounts) to redeem your remaining shares and
            close that Fund account after giving you 60 days to increase your
            balance. Your Fund account will not be liquidated if the reduction
            in size is due solely to a decline in market value of your Fund
            shares or if the aggregate value of all your PIMCO Funds accounts
            exceeds $50,000.

Exchanging  You may exchange your Class A, Class B or Class C shares of any
Shares      Fund for the same Class of shares of any other Fund or of a series
            of PIMCO Funds: Multi-Manager Series. Shares are exchanged on the
            basis of their respective NAVs next calculated after your exchange
            order is received by the Distributor (except if Class A shares of
            the Money Market Fund are exchanged for Class A shares of any
            other Fund, the usual sales charges applicable to investments in
            such other Fund apply on shares for which no sales load was paid
            at the time of purchase). Currently, the Trust does not charge any
            exchange fees or charges. Exchanges are subject to the $2,500
            minimum initial purchase requirements for each Fund, except with
            respect to tax-qualified programs and exchanges effected through
            the PIMCO Funds Auto-Exchange plan. If you maintain your account
            with the Distributor, you may exchange shares by completing a
            written exchange request and sending it to PIMCO Funds
            Distributors LLC, P.O. Box 9688, Providence, RI 02940-0926. You
            can get an exchange form by calling the Distributor at
            1-800-426-0107.

             The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO, the purchase would adversely affect a Fund
            and its shareholders. In particular, a pattern of exchanges
            characteristic of "market-timing" strategies may be deemed by
            PIMCO to be detrimental to the Trust or a particular Fund.
            Currently, the Trust limits the number of "round trip" exchanges
            an investor may make. An investor makes a "round trip" exchange
            when the investor purchases shares of a particular Fund,
            subsequently exchanges those shares for shares of a different
            PIMCO Fund and then exchanges back into the originally purchased
            Fund. The Trust has the right to refuse any exchange for any
            investor who completes (by making the exchange back into the
            shares of the originally purchased Fund) more than six round trip
            exchanges in any twelve-month period. Although the Trust has no
            current intention of terminating or modifying the exchange
            privilege other than as set forth in the preceding sentence, it
            reserves the right to do so at any time. Except as otherwise
            permitted by the Securities and Exchange Commission, the Trust
            will give you 60 days' advance notice if it exercises its right to
            terminate or materially modify the exchange privilege. The Guide
            provides more detailed information about the exchange privilege,
            including the procedures you must follow and additional exchange
            options. You can obtain a Guide free of charge from the
            Distributor by written request or by calling 1-800-426-0107. See
            "PIMCO Funds Shareholders' Guide" above.
                                                                   Prospectus
                                                                              40
<PAGE>

Selling     You can sell (redeem) Class A, Class B or Class C shares of the
Shares      Funds in the following ways:

              . Through your broker, dealer or other financial
            intermediary. Your broker, dealer or other intermediary may
            independently charge you transaction fees and additional amounts
            in return for its services, which will reduce your return.

              . Directly from the Trust by Written Request. To redeem shares
            directly from the Trust by written request (whether or not the
            shares are represented by certificates), you must send the
            following items to the Trust's Transfer Agent, PFPC Inc., P.O. Box
            9688, Providence, RI 02940-9688:

              (1) a written request for redemption signed by all registered
              owners exactly as the account is registered on the Transfer
              Agent's records, including fiduciary titles, if any, and
              specifying the account number and the dollar amount or number of
              shares to be redeemed;

              (2) for certain redemptions described below, a guarantee of all
              signatures on the written request or on the share certificate or
              accompanying stock power, if required, as described under
              "Signature Guarantee" below;

              (3) any share certificates issued for any of the shares to be
              redeemed (see "Certificated Shares" below); and

              (4) any additional documents which may be required by the
              Transfer Agent for redemption by corporations, partnerships or
              other organizations, executors, administrators, trustees,
              custodians or guardians, or if the redemption is requested by
              anyone other than the shareholder(s) of record. Transfers of
              shares are subject to the same requirements.

             A signature guarantee is not required for redemptions requested
            by and payable to all shareholders of record for the account, and
            to be sent to the address of record for that account. To avoid
            delay in redemption or transfer, if you have any questions about
            these requirements you should contact the Transfer Agent in
            writing or call 1-800-426-0107 before submitting a request.
            Written redemption or transfer requests will not be honored until
            all required documents in the proper form have been received by
            the Transfer Agent. You can not redeem your shares by written
            request if they are held in broker "street name" accounts--you
            must redeem through your broker.

             If the proceeds of your redemption (i) are to be paid to a person
            other than the record owner, (ii) are to be sent to an address
            other than the address of the account on the Transfer Agent's
            records, and/or (iii) are to be paid to a corporation,
            partnership, trust or fiduciary, the signature(s) on the
            redemption request and on the certificates, if any, or stock power
            must be guaranteed as described under "Signature Guarantee" below.
            The Distributor may, however, waive the signature guarantee
            requirement for redemptions up to $2,500 by a trustee of a
            qualified retirement plan, the administrator for which has an
            agreement with the Distributor.

             The Guide describes a number of additional ways you can redeem
            your shares, including:

                . Telephone requests to the Transfer Agent
                . PIMCO Funds Automated Telephone System (ATS)
                . Expedited wire transfers
                . Automatic Withdrawal Plan
                . PIMCO Funds Fund Link

             Unless you specifically elect otherwise, your initial account
            application permits you to redeem shares by telephone subject to
            certain requirements. To be eligible for ATS, expedited wire
            transfer, Automatic Withdrawal Plan, and Fund Link privileges, you
            must specifically elect the particular option on your account
            application and satisfy certain other requirements. The Guide
            describes each of these options and provides additional
            information about selling shares. You can obtain a Guide free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107.

             Other than an applicable CDSC, you will not pay any special fees
            or charges to the Trust or the Distributor when you sell your
            shares. However, if you sell your shares through your broker,
            dealer or other financial intermediary, that firm may charge you a
            commission or other fee for processing your redemption request.

             Redemptions of Fund shares may be suspended when trading on the
            New York Stock Exchange is restricted or during an emergency which
            makes it impracticable for the Funds to dispose of their
            securities or to determine fairly the value of their net assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors. Under these
            and other unusual circumstances, the Trust may suspend redemptions
            or postpone payment for more than seven days, as permitted by law.
  Pacific Investment Management Series
41
<PAGE>

Timing of    Redemption proceeds will normally be mailed to the redeeming
Redemption   shareholder within seven calendar days or, in the case of wire
Payments     transfer or Fund Link redemptions, sent to the designated bank
             account within one business day. Fund Link redemptions may be
             received by the bank on the second or third business day. In cases
             where shares have recently been purchased by personal check,
             redemption proceeds may be withheld until the check has been
             collected, which may take up to 15 days. To avoid such withholding,
             investors should purchase shares by certified or bank check or by
             wire transfer.

Redemptions  The Trust will redeem shares of each Fund solely in cash up to the
In Kind      lesser of $250,000 or 1% of the Fund's net assets during any 90-
             day period for any one shareholder. In consideration of the best
             interests of the remaining shareholders, the Trust may pay any
             redemption proceeds exceeding this amount in whole or in part by a
             distribution in kind of securities held by a Fund in lieu of cash.
             It is highly unlikely that your shares would ever be redeemed in
             kind. If your shares are redeemed in kind, you should expect to
             incur transaction costs upon the disposition of the securities
             received in the distribution.

Certificated If you are redeeming shares for which certificates have been
Shares       issued, the certificates must be mailed to or deposited with the
             Trust, duly endorsed or accompanied by a duly endorsed stock power
             or by a written request for redemption. Signatures must be
             guaranteed as described under "Signature Guarantee" below. The
             Trust may request further documentation from institutions or
             fiduciary accounts, such as corporations, custodians (e.g., under
             the Uniform Gifts to Minors Act), executors, administrators,
             trustees or guardians. Your redemption request and stock power must
             be signed exactly as the account is registered, including
             indication of any special capacity of the registered owner.

Signature    When a signature guarantee is called for, you should have
Guarantee    "Signature Guaranteed" stamped under your signature and guaranteed
             by any of the following entities: U.S. banks, foreign banks having
             a U.S. correspondent bank, credit unions, savings associations,
             U.S. registered dealers and brokers, municipal securities dealers
             and brokers, government securities dealers and brokers, national
             securities exchanges, registered securities associations and
             clearing agencies (each an "Eligible Guarantor Institution"). The
             Distributor reserves the right to reject any signature guarantee
             pursuant to its written signature guarantee standards or
             procedures, which may be revised in the future to permit it to
             reject signature guarantees from Eligible Guarantor Institutions
             that do not, based on credit guidelines, satisfy such written
             standards or procedures. The Trust may change the signature
             guarantee requirements from time to time upon notice to
             shareholders, which may be given by means of a new or supplemented
             Prospectus.

             Fund Distributions

             Each Fund distributes substantially all of its net investment
             income to shareholders in the form of dividends. You begin earning
             dividends on Fund shares the day after the Trust receives your
             purchase payment. Dividends paid by each Fund with respect to each
             class of shares are calculated in the same manner and at the same
             time, but dividends on Class B and Class C shares are expected to
             be lower than dividends on Class A shares as a result of the
             distribution fees applicable to Class B and Class C shares. The
             following shows when each Fund intends to declare and distribute
             income dividends to shareholders of record.










             <TABLE>
<CAPTION>
                                                Declared Daily
                                                   and Paid     Declared and
         Fund                                      Monthly     Paid Quarterly
         --------------------------------------------------------------------
         <S>                                    <C>            <C>
         Fixed Income Funds                           .
         --------------------------------------------------------------------
         Convertible, StocksPLUS and Strategic
          Balanced Funds                                             .
         --------------------------------------------------------------------
</TABLE>

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

             You can choose from the following distribution options:

              .  Reinvest all distributions in additional shares of the same
                 class of your Fund at NAV. This will be done unless you elect
                 another option.
              .  Invest all distributions in shares of the same class of any
                 other Fund or another series of the Trust or PIMCO Funds:
                 Multi-Manager Series which offers that class at NAV. You must
                 have an account existing in the Fund or series selected for
                 investment with the identical registered name.

                                                                   Prospectus
                                                                              42
<PAGE>

               You must elect this option on your account application or by a
               telephone request to the Transfer Agent at 1-800-426-0107.
              .  Receive all distributions in cash (either paid directly to
                 you or credited to your account with your broker or other
                 financial intermediary). You must elect this option on your
                 account application or by a telephone request to the Transfer
                 Agent at 1-800-426-0107.

             You do not pay any sales charges on shares you receive through
            the reinvestment of Fund distributions.

             If you elect to receive Fund distributions in cash and the postal
            or other delivery service is unable to deliver checks to your
            address of record, the Trust's Transfer Agent will hold the
            returned checks for your benefit in a non-interest bearing
            account.

            Tax Consequences

            . Taxes on Fund distributions. If you are subject to U.S. federal
            income tax, you will be subject to tax on Fund distributions
            whether you received them in cash or reinvested them in additional
            shares of the Funds. For federal income tax purposes, Fund
            distributions will be taxable to you as either ordinary income or
            capital gains.

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

             Fund distributions are taxable to you even if they are paid from
            income or gains earned by a Fund prior to your investment and thus
            were included in the price you paid for your shares. For example,
            if you purchase shares on or just before the record date of a Fund
            distribution, you will pay full price for the shares and may
            receive a portion of your investment back as a taxable
            distribution.

            . Taxes when you sell (redeem) or exchange your shares. Any gain
            resulting from the sale of Fund shares will generally be subject
            to federal income tax. When you exchange shares of a Fund for
            shares of another series, the transaction will be treated as a
            sale of the Fund shares for these purposes, and any gain on those
            shares will generally be subject to federal income tax.

            . Consult your tax advisor about other possible tax
            consequences. This is a summary of certain federal income tax
            consequences of investing in a Fund. You should consult your tax
            advisor for more information on your own tax situation, including
            possible state, local and foreign tax consequences.

            . A Note on the Real Return Bond Fund. Periodic adjustments for
            inflation to the principal amount of an inflation-indexed bond may
            give rise to original issue discount, which will be includable in
            the Fund's gross income. Due to original issue discount, the Fund
            may be required to make annual distributions to shareholders that
            exceed the cash received, which may cause the Fund to liquidate
            certain investments when it is not advantageous to do so. Also, if
            the principal value of an inflation-indexed bond is adjusted
            downward due to deflation, amounts previously distributed in the
            taxable year may be characterized in some circumstances as a
            return of capital.

             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 Fund dividends and capital distributions.
            Please see the Statement of Additional Information for additional
            information regarding the tax aspects of investing in the Funds.
  Pacific Investment Management Series
43
<PAGE>

            Characteristics and Risks of Securities and Investment Techniques

            This section provides additional information about some of the
            principal investments and related risks of the Funds described
            under "Summary Information" above. It also describes
            characteristics and risks of additional securities and investment
            techniques that may be used by the Funds 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
            of securities and investment techniques that may be used by the
            Funds. As with any mutual fund, investors in the Funds 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 Funds.

Securities  Most of the Funds in this prospectus seek maximum total return.
Selection   The total return sought by a Fund consists of both income earned
            on a Fund's investments and capital appreciation, if any, arising
            from increases in the market value of a Fund'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 selecting securities for a Fund, PIMCO develops an outlook for
            interest rates, currency exchange rates and the economy; analyzes
            credit and call risks, and uses other security selection
            techniques. The proportion of a Fund'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. economy, the financial markets and
            other factors.

             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.        U.S. Government Securities are obligations of, or guaranteed by,
Government  the U.S. Government, its agencies or government-sponsored
Securities  enterprises. 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.

Municipal   Municipal bonds are generally issued by states and local
Bonds       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.

Mortgage-   Each Fund may invest in mortgage-or other asset-backed securities.
Related     Except for the Money Market and Convertible Funds, each Fund may
and Other   invest all of its assets in such securities. Mortgage-related
Asset-      securities include mortgage pass-through securities,
Backed      collateralized mortgage obligations ("CMOs"), commercial mortgage-
Securities  backed securities, mortgage dollar rolls, CMO residuals, stripped
            mortgage-backed securities ("SMBSs") 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 a Fund 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
                                                                   Prospectus
                                                                              44
<PAGE>

            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 SMBS has one class receiving all of the interest from
            the mortgage assets (the interest-only, or "IO" class), while the
            other class will receive all of the principal (the principal-only,
            or "PO" class). The yield to maturity on an IO 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 a
            Fund's yield to maturity from these securities. A Fund may not
            invest more than 5% of its assets in any combination of IO, PO, or
            inverse floater securities. The Funds may invest in other asset-
            backed securities that have been offered to investors.

Loan        Certain Funds may invest in fixed- and floating-rate loans, which
Participa-  investments generally will be in the form of loan participations
tions and   and assignments of portions of such loans. Participations and
Assignments assignments involve special types of risk, including credit risk,
            interest rate risk, liquidity risk, and the risks of being a
            lender. If a Fund 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.

Corporate   Corporate debt securities are subject to the risk of the issuer's
Debt        inability to meet principal and interest payments on the
Securities  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.

High        Securities rated lower than Baa by Moody's Investors Service, Inc.
Yield       ("Moody's") or lower than BBB by Standard & Poor's Ratings
Securities  Services ("S&P") 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 predominately 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 this 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 Fund 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 Fund 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
            Fund 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 Fund invests in high yield and/or unrated securities, the
            Fund's success in achieving its investment objective may depend
            more heavily on the portfolio manager's creditworthiness analysis
            than if the Fund invested exclusively in higher-quality and rated
            securities.

Variable    Variable and floating rate securities provide for a periodic
and         adjustment in the interest rate paid on the obligations. Each Fund
Floating    may invest in floating rate debt instruments ("floaters") and
Rate        (except the Money Market Fund) engage in credit spread trades.
Securities  While floaters provide a certain degree of protection against
            rises in interest rates, a Fund will participate in any declines
            in interest rates as well. Each Fund (except the Money Market
            Fund) may also invest in inverse floating rate debt instruments
            ("inverse floaters"). An inverse floater may exhibit greater price
            volatility than a fixed rate obligation of similar

  Pacific Investment Management Series
45
<PAGE>

            credit quality. A Fund may not invest more than 5% of its assets
            in any combination of inverse floater, interest only, or principal
            only securities.

Inflation-  Inflation-indexed bonds are fixed income securities whose
Indexed     principal value is periodically adjusted according to the rate of
Bonds       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.

Event-      Each Fund (except the Money Market Fund) may invest in "event-
Linked      linked bonds," which are fixed income securities for which the
Bonds       return of principal and payment of interest is contingent on the
            non-occurrence of a specific "trigger" event, such as a hurricane,
            earthquake, or other physical or weather-related phenomenon. Some
            event-linked bonds are commonly referred to as "catastrophe
            bonds." If a trigger event occurs, a Fund may lose a portion or
            all of its principal invested in the bond. Even-linked bonds often
            provide for an extension of maturity to process and audit loss
            claims where a trigger event has, or possibly has, occurred. An
            extension of maturity may increase volatility. Event-linked bonds
            may also expose the Fund to certain unanticipated risks including
            credit risk, adverse regulatory or jurisdictional interpretations,
            and adverse tax consequences. Event-linked bonds may also be
            subject to liquidity risk.

Convertible Each Fund (except the Money Market Fund) may invest in convertible
and         securities. Convertible securities are generally preferred stocks
Equity      and other securities, including fixed income securities and
Securities  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 Fund may be forced to convert a security before it would
            otherwise choose, which may have an adverse effect on the Fund's
            ability to achieve its investment objective.

             While the Fixed Income Funds 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 Fund may
            consider convertible securities or equity securities to gain
            exposure to such investments.

             Equity securities generally have greater price volatility than
            fixed income securities. The market price of equity securities
            owned by a Fund may go up or down, sometimes rapidly or
            unpredictably. Equity securities may decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The value of
            an equity security may also 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 or
            services.

Foreign     Investing in foreign securities involves special risks and
(Non-       considerations not typically associated with investing in U.S.
U.S.)       securities. Shareholders should consider carefully the substantial
Securities  risks involved for Funds that invest 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

                                                                   Prospectus
                                                                              46
<PAGE>

            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 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.

             Certain Funds also may invest in sovereign debt issued by
            governments, their agencies or instrumentalities, or other
            government-related entities. Holders of sovereign debt may be
            requested to participate in the rescheduling of such debt and to
            extend further loans to governmental entities. In addition, there
            is no bankruptcy proceeding by which defaulted sovereign debt may
            be collected.

            .Emerging Market Securities. The Emerging Markets Bond Fund
            invests primarily in securities of issuers based in countries with
            developing (or "emerging market") economies, while the Short-Term
            and Low Duration Funds may invest up to 5% of their assets in such
            securities and each remaining Fund that may invest in foreign
            securities may invest up to 10% of its assets in such securities.
            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; 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 Fund. 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 Fund 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.

             Each Fund (except the Long-Term U.S. Government Fund) 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 a Fund may be subject to restructuring arrangements or to
            requests for new credit, which may cause the Fund to suffer a loss
            of interest or principal on any of its holdings.

Foreign     A Fund that invests directly in foreign currencies or in
(Non-       securities that trade in, or receive revenues in, foreign
U.S.)       currencies will be subject to currency risk. Foreign currency
Currencies  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,
            uncertainty surrounds the introduction of the euro (a common
            currency unit for the European Union) and the effect it may have
            on the value of European currencies as well as securities
            denominated in local European currencies. These and other
            currencies in which the Funds' assets are denominated may be
            devalued against the U.S. dollar, resulting in a loss to the
            Funds.

            .Foreign Currency Transactions. Funds that invest in securities
            denominated in foreign currencies 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 a Fund's exposure
            to changes in the value of the currency it will deliver
  Pacific Investment Management Series
47
<PAGE>

            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 a Fund 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 realized if the value of the hedged
            currency increases. A Fund 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 a Fund 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 Fund to benefit
            from favorable fluctuations in relevant foreign currencies. A Fund
            may use one currency (or a basket of currencies) to hedge against
            adverse changes in the value of another currency (or a basket of
            currencies) when exchange rates between the two currencies are
            positively correlated. The Fund 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.

Repurchase  Each Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer and agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund 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     Each Fund may enter into reverse repurchase agreements and dollar
Repurchase  rolls, subject to the Fund's limitations on borrowings. A reverse
Agreements, repurchase agreement or dollar roll involves the sale of a
Dollar      security by a Fund and its agreement to repurchase the instrument
Rolls and   at a specified time and price, and may be considered a form of
Other       borrowing for some purposes. A Fund will segregate assets
Borrowings  determined to be liquid by PIMCO in accordance with procedures
            established by the Board of Trustees or otherwise to cover its
            obligations under reverse repurchase agreements, dollar rolls, and
            other borrowings. Reverse repurchase agreements, dollar rolls and
            other forms of borrowings may create leveraging risk for a Fund.

             Each Fund may borrow money to the extent permitted under the
            Investment Company Act of 1940 ("1940 Act"), as amended. This
            means that, in general, a Fund may borrow money from banks for any
            purpose on a secured basis in an amount up to 1/3 of the Fund's
            total assets. A Fund may also borrow money for temporary
            administrative purposes on an unsecured basis in an amount not to
            exceed 5% of the Fund's total assets.

Derivatives Each Fund (except the Money Market Fund) 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 swap agreements. Each
            Fund (except the Money Market Fund) may invest some or all of its
            assets in derivative instruments. A portfolio manager may decide
            not to employ any of these strategies and there is no assurance
            that any derivatives strategy used by a Fund will succeed. A
            description of these and other derivative instruments that the
            Funds may use are described under "Investment Objectives and
            Policies" in the Statement of Additional Information.

             A Fund's use of derivative instruments involves risks different
            from, or possibly 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 Funds.

             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
                                                                   Prospectus
                                                                              48
<PAGE>

             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 Fund uses derivatives
             for leverage, investments in that Fund will tend to be more
             volatile, resulting in larger gains or losses in response to market
             changes. To limit leverage risk, each Fund 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 Fund
             will engage in derivatives transactions at any time or from time to
             time. A Fund'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 Fund'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 Fund, the Fund 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 Fund investments. A Fund may also have to buy or sell a
             security at a disadvantageous time or price because the Fund 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 Fund. 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 Fund's use of derivatives may cause
             the Fund to realize higher amounts of short-term capital gains
             (generally taxed at ordinary income tax rates) than if the Fund had
             not used such instruments.

Delayed      The Funds (except the Money Market Fund) may also enter into, or
Funding      acquire participations in, delayed funding loans and revolving
Loans and    credit facilities, in which a lender agrees to make loans up to a
Revolving    maximum amount upon demand by the borrower during a specified
Credit       term. These commitments may have the effect of requiring a Fund to
Facilities   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 a Fund 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.

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

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

              Subject to the restrictions and limitations of the 1940 Act, each
             Fund may, in the future, elect to pursue its investment objective
             by investing in one or more underlying investment vehicles or
             companies that have substantially similar investment objectives,
             policies and limitations as the Fund.

  Pacific Investment Management Series
49
<PAGE>

Short        Each Fund may make short sales as part of its overall portfolio
Sales        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.
             Short sales expose a Fund 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 Fund. A Fund making a short sale 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.

Illiquid     Each Fund may invest up to 15% (10% in the case of the Money
Securities   Market Fund) 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 Fund 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.

Loans of     For the purpose of achieving income, each Fund may lend its
Portfolio    portfolio securities to brokers, dealers, and other financial
Securities   institutions provided a number of conditions are satisfied,
             including that the loan is fully collateralized. Please see
             "Investment Objectives and Policies" in the Statement of Additional
             Information for details. When a Fund lends portfolio securities,
             its investment performance will continue to reflect changes in the
             value of the securities loaned, and the Fund 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 Fund may pay lending fees to a party
             arranging the loan.

Portfolio    The length of time a Fund has held a particular security is not
Turnover     generally a consideration in investment decisions. A change in the
             securities held by a Fund is known as "portfolio turnover." Each
             Fund 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
             Fund, 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 generally taxed at ordinary income tax rates). The trading
             costs and tax effects associated with portfolio turnover may
             adversely affect a Fund's performance.

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

Changes      The investment objective of the Global Bond Fund II may be changed
in           by the Board of Trustees without shareholder approval. The
Investment   investment objective of each other Fund is fundamental and may not
Objectives   be changed without shareholder approval. Unless otherwise stated,
and          all other investment policies of the Funds may be changed by the
Policies     Board of Trustees without shareholder approval.

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

Other        The Funds may invest in other types of securities and use a
Investments  variety of investment techniques and strategies which are not
and          described in this Prospectus. These securities and techniques may
Techniques   subject the Funds 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 Funds.

                                                                   Prospectus
                                                                              50
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help you understand
            the financial performance of Class A, Class B and Class C shares
            of each Fund for the past 5 years or, if the class is less than 5
            years old, since the class of shares was first offered. Certain
            information reflects financial results for a single Fund share.
            The total returns in the table represent the rate that an investor
            would have earned or lost on an investment in a particular class
            of shares of a Fund, assuming reinvestment of all dividends and
            distributions. This information has been audited by
            PricewaterhouseCoopers LLP, whose report, along with each Fund's
            financial statements, are included in the Trust's annual report to
            shareholders. The annual report is incorporated by reference in
            the Statement of Additional Information and is available free of
            charge upon request from the Distributor.

<TABLE>
<CAPTION>
                         Net Asset                Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value        Net      and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning  Investment   Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period Income (Loss)  Investments    Operations    Income      Income     Capital Gains Capital Gains
- ---------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>           <C>            <C>          <C>        <C>           <C>           <C>
Money Market
 Class A
  03/31/1999              $ 1.00       $0.05(a)      $ 0.00 (a)    $0.05       $(0.05)     $ 0.00        $ 0.00        $ 0.00
  03/31/1998                1.00        0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
  01/13/1997 - 03/31/1997   1.00        0.01           0.00         0.01        (0.01)       0.00          0.00          0.00
 Class B
  03/31/1999                1.00        0.04(a)        0.00 (a)     0.04        (0.04)       0.00          0.00          0.00
  03/31/1998                1.00        0.04(a)        0.00 (a)     0.04        (0.04)       0.00          0.00          0.00
  01/13/1997 - 03/31/1997   1.00        0.01           0.00         0.01        (0.01)       0.00          0.00          0.00
 Class C
  03/31/1999                1.00        0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
  03/31/1998                1.00        0.05(a)        0.00 (a)     0.05        (0.05)       0.00          0.00          0.00
  01/13/1997 - 03/31/1997   1.00        0.01           0.00         0.01        (0.01)       0.00          0.00          0.00
Short-Term
 Class A
  03/31/1999              $10.06       $0.53(a)      $(0.02)(a)    $0.51       $(0.53)     $ 0.00        $ 0.00        $(0.01)
  03/31/1998               10.00        0.55(a)        0.09 (a)     0.64        (0.56)      (0.01)        (0.01)         0.00
  01/20/1997 - 03/31/1997  10.04        0.10          (0.03)        0.07        (0.10)      (0.01)         0.00          0.00
 Class B
  03/31/1999               10.06        0.45(a)       (0.02)(a)     0.43        (0.45)       0.00          0.00         (0.01)
  03/31/1998               10.00        0.50(a)        0.08 (a)     0.58        (0.50)      (0.01)        (0.01)         0.00
  01/20/1997 - 03/31/1997  10.04        0.09          (0.03)        0.06        (0.10)       0.00          0.00          0.00
 Class C
  03/31/1999               10.06        0.50(a)       (0.02)(a)     0.48        (0.50)       0.00          0.00         (0.01)
  03/31/1998               10.00        0.54(a)        0.07 (a)     0.61        (0.53)      (0.01)        (0.01)         0.00
  01/20/1997 - 03/31/1997  10.04        0.09          (0.03)        0.06        (0.10)       0.00          0.00          0.00
Low Duration
 Class A
  03/31/1999              $10.18       $0.60(a)      $(0.02)(a)    $0.58       $(0.60)     $ 0.00        $(0.01)       $(0.05)
  03/31/1998                9.98        0.60(a)        0.23 (a)     0.83        (0.58)      (0.02)        (0.03)         0.00
  01/13/1997 - 03/31/1997  10.02        0.12          (0.03)        0.09        (0.12)      (0.01)         0.00          0.00
 Class B
  03/31/1999               10.18        0.52(a)       (0.02)(a)     0.50        (0.52)       0.00         (0.01)        (0.05)
  03/31/1998                9.98        0.53(a)        0.22 (a)     0.75        (0.50)      (0.02)        (0.03)         0.00
  01/13/1997 - 03/31/1997  10.02        0.10          (0.03)        0.07        (0.11)       0.00          0.00          0.00
 Class C
  03/31/1999               10.18        0.55(a)       (0.02)(a)     0.53        (0.55)       0.00         (0.01)        (0.05)
  03/31/1998                9.98        0.55(a)        0.23 (a)     0.78        (0.53)      (0.02)        (0.03)         0.00
  01/13/1997 - 03/31/1997  10.02        0.11          (0.03)        0.08        (0.11)      (0.01)         0.00          0.00
</TABLE>
- -------
(a) Per share amounts based on average number of shares outstanding during the
period.

  Pacific Investment Management Series
51
<PAGE>



<TABLE>
<CAPTION>
                                                                 Ratio of Net
Tax Basis                Net Asset        Net Assets  Ratio of    Investment
 Return                    Value             End     Expenses to  Income to   Portfolio
   of          Total        End    Total  of Period    Average     Average    Turnover
 Capital   Distributions of Period Return   (000's)  Net Assets   Net Assets    Rate
- ---------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>    <C>        <C>         <C>          <C>
  $0.00       $(0.05)     $ 1.00    4.76%  105,200      0.60%        4.78%       N/A
   0.00        (0.05)       1.00    5.10    41,375      0.60         5.02        N/A
   0.00        (0.01)       1.00    1.01    43,589      0.57+        4.44+       N/A
   0.00        (0.04)       1.00    4.03    14,968      1.50         3.79        N/A
   0.00        (0.04)       1.00    4.21     2,937      1.50         4.15        N/A
   0.00        (0.01)       1.00    0.83     3,143      1.41+        3.62+       N/A
   0.00        (0.05)       1.00    4.85    86,159      0.60         4.79        N/A
   0.00        (0.05)       1.00    5.14    55,696      0.60         5.05        N/A
   0.00        (0.01)       1.00    1.02    85,398      0.58+        4.47+       N/A
  $0.00       $(0.54)     $10.03    5.21%   80,787      0.85%        5.15%        47%
   0.00        (0.58)      10.06    6.64    24,182      0.85         5.48         48
   0.00        (0.11)      10.00    0.66     2,533      0.86+        5.07+        77
   0.00        (0.46)      10.03    4.43     3,813      1.60         4.45         47
   0.00        (0.52)      10.06    5.96     1,258      1.60         4.97         48
   0.00        (0.10)      10.00    0.58       114      1.62+        4.83+        77
   0.00        (0.51)      10.03    4.91    15,589      1.15         4.92         47
   0.00        (0.55)      10.06    6.33     6,763      1.15         5.33         48
   0.00        (0.10)      10.00    0.63     1,359      1.14+        4.78+        77
  $0.00       $(0.66)     $10.10    5.86%  191,727      0.90%        5.85%       245%
   0.00        (0.63)      10.18    8.49   109,531      0.90         5.93        309
   0.00        (0.13)       9.98    0.85    59,348      0.91+        5.84+       240
   0.00        (0.58)      10.10    5.07    65,160      1.65         5.03        245
   0.00        (0.55)      10.18    7.68    17,624      1.65         5.16        309
   0.00        (0.11)       9.98    0.68     5,296      1.67+        5.03+       240
   0.00        (0.61)      10.10    5.33   112,229      1.40         5.35        245
   0.00        (0.58)      10.18    8.01    68,766      1.40         5.46        309
   0.00        (0.12)       9.98    0.75    63,606      1.42+        5.36+       240
</TABLE>
- -------
+ Annualized.
                                                                   Prospectus
                                                                              52
<PAGE>


<TABLE>
<CAPTION>
                         Net Asset    Net       Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value   Investment  and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning   Income    Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period   (Loss)     Investments    Operations    Income      Income     Capital Gains Capital Gains
- -------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>         <C>            <C>          <C>        <C>           <C>           <C>
Total Return
 Class A
 03/31/1999               $10.62     $0.58(a)      $ 0.16 (a)    $ 0.74      $(0.58)     $ 0.00        $(0.24)       $(0.18)
 03/31/1998                10.27      0.58(a)        0.63 (a)      1.21       (0.57)      (0.02)        (0.27)         0.00
 01/13/1997 - 03/31/1997   10.40      0.12          (0.12)         0.00       (0.13)       0.00          0.00          0.00
 Class B
 03/31/1999                10.62      0.50(a)        0.16 (a)      0.66       (0.50)       0.00         (0.24)        (0.18)
 03/31/1998                10.27      0.50(a)        0.63 (a)      1.13       (0.50)      (0.01)        (0.27)         0.00
 01/13/1997 - 03/31/1997   10.40      0.11          (0.12)        (0.01)      (0.12)       0.00          0.00          0.00
 Class C
 03/31/1999                10.62      0.50(a)        0.16 (a)      0.66       (0.50)       0.00         (0.24)        (0.18)
 03/31/1998                10.27      0.51(a)        0.63 (a)      1.14       (0.51)      (0.01)        (0.27)         0.00
 01/13/1997 - 03/31/1997   10.40      0.11          (0.12)        (0.01)      (0.12)       0.00          0.00          0.00
Long-Term U.S. Government
 Class A
 03/31/1999               $10.57     $0.59(a)      $ 0.20 (a)    $ 0.79      $(0.60)     $ 0.00        $ 0.00        $(0.46)
 03/31/1998                 9.39      0.48(a)        1.34 (a)      1.82       (0.58)       0.00         (0.06)         0.00
 01/20/1997 - 03/31/1997    9.67      0.32          (0.47)        (0.15)      (0.13)       0.00          0.00          0.00
 Class B
 03/31/1999                10.57      0.51(a)        0.20 (a)      0.71       (0.52)       0.00          0.00         (0.46)
 03/31/1998                 9.39      0.39(a)        1.35 (a)      1.74       (0.50)       0.00         (0.06)         0.00
 01/20/1997 - 03/31/1997    9.67      0.29          (0.47)        (0.18)      (0.10)       0.00          0.00          0.00
 Class C
 03/31/1999                10.57      0.50(a)        0.21 (a)      0.71       (0.52)       0.00          0.00         (0.46)
 03/31/1998                 9.39      0.39(a)        1.35 (a)      1.74       (0.50)       0.00         (0.06)         0.00
 01/20/1997 - 03/31/1997    9.67      0.29          (0.47)        (0.18)      (0.10)       0.00          0.00          0.00
Global Bond II
 Class A
 03/31/1999               $ 9.92     $0.48(a)      $ 0.06 (a)    $ 0.54      $(0.48)     $ 0.00        $(0.01)       $(0.08)
 03/31/1998                10.84      0.64(a)        0.51 (a)      1.15        0.00       (0.54)        (1.53)         0.00
 10/01/1996 - 03/31/1997   10.96      0.66          (0.16)         0.50       (0.22)       0.00         (0.40)         0.00
 09/30/1996                10.00      0.32(b)        0.95          1.27       (0.31)       0.00          0.00          0.00
 Class B
 03/31/1999                 9.92      0.41(a)        0.06 (a)      0.47       (0.41)       0.00         (0.01)        (0.08)
 03/31/1998                10.84      0.66(a)        0.41 (a)      1.07        0.00       (0.46)        (1.53)         0.00
 10/01/1996 - 03/31/1997   10.96      0.62          (0.16)         0.46       (0.18)       0.00         (0.40)         0.00
 09/30/1996                10.00      0.30(b)        0.92          1.22       (0.26)       0.00          0.00          0.00
 Class C
 03/31/1999                 9.92      0.41(a)        0.06 (a)      0.47       (0.41)       0.00         (0.01)        (0.08)
 03/31/1998                10.84      0.55(a)        0.52 (a)      1.07        0.00       (0.46)        (1.53)         0.00
 10/01/1996 - 03/31/1997   10.96      0.62          (0.16)         0.46       (0.18)       0.00         (0.40)         0.00
 09/30/1996                10.00      0.30(b)        0.92          1.22       (0.26)       0.00          0.00          0.00
Foreign Bond
 Class A
 03/31/1999               $10.74     $0.53(a)      $ 0.24 (a)    $ 0.77      $(0.53)     $ 0.00        $(0.10)       $(0.25)
 03/31/1998                10.41      0.61(a)        0.62 (a)      1.23       (0.59)       0.00         (0.31)         0.00
 01/20/1997 - 03/31/1997   10.59      0.59          (0.72)        (0.13)      (0.05)       0.00          0.00          0.00
 Class B
 03/31/1999                10.74      0.46(a)        0.24 (a)      0.70       (0.46)       0.00         (0.10)        (0.25)
 03/31/1998                10.41      0.53(a)        0.61 (a)      1.14       (0.50)       0.00         (0.31)         0.00
 01/20/1997 - 03/31/1997   10.59      0.58          (0.72)        (0.14)      (0.04)       0.00          0.00          0.00
 Class C
 03/31/1999                10.74      0.45(a)        0.24 (a)      0.69       (0.45)       0.00         (0.10)        (0.25)
 03/31/1998                10.41      0.52(a)        0.62 (a)      1.14       (0.50)       0.00         (0.31)         0.00
 01/20/1997 - 03/31/1997   10.59      0.58          (0.72)        (0.14)      (0.04)       0.00          0.00          0.00
</TABLE>
- -------
(b) Reflects voluntary waiver of investment advisory fee of $12,041 (.01 per
share) by the adviser.

  Pacific Investment Management Series
53
<PAGE>

<TABLE>
<CAPTION>
                                                                   Ratio of Net
Tax Basis                Net Asset         Net Assets  Ratio of     Investment
 Return                    Value              End     Expenses to   Income to   Portfolio
   of          Total        End    Total   of Period    Average      Average    Turnover
 Capital   Distributions of Period Return    (000's)  Net Assets    Net Assets    Rate
- -----------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>     <C>        <C>          <C>          <C>
  $0.00       $(1.00)     $10.36    7.09%  $1,140,606    0.90%         5.37%        154%
   0.00        (0.86)      10.62   12.11      533,893    0.90          5.46         206
   0.00        (0.13)      10.27    0.02      115,742    0.91+         6.08+        173
   0.00        (0.92)      10.36    6.28      549,478    1.65          4.55         154
   0.00        (0.78)      10.62   11.26      186,932    1.65          4.74         206
   0.00        (0.12)      10.27   (0.10)      74,130    1.67+         5.28+        173
   0.00        (0.92)      10.36    6.29      715,201    1.65          4.63         154
   0.00        (0.79)      10.62   11.28      405,037    1.65          4.83         206
   0.00        (0.12)      10.27   (0.11)     329,104    1.67+         5.32+        173
  $0.00       $(1.06)     $10.30    7.34%  $   29,809    1.34%(e)      5.33%        364%
   0.00        (0.64)      10.57   19.78        6,161    0.91          4.49         177
   0.00        (0.13)       9.39   (1.72)       1,204    1.12+         6.91+        402
   0.00        (0.98)      10.30    6.51       37,946    2.13(f)       4.53         364
   0.00        (0.56)      10.57   18.85        7,516    1.66          4.64         177
   0.00        (0.10)       9.39   (1.92)         454    1.87+         4.95+        402
   0.00        (0.98)      10.30    6.52       31,653    2.16(g)       4.50         364
   0.00        (0.56)      10.57   18.86        7,258    1.66          4.64         177
   0.00        (0.10)       9.39   (1.83)         275    1.88+         5.52+        402
  $0.00       $(0.57)     $ 9.89    5.65%  $    2,728    0.95%         5.07%        236%
   0.00        (2.07)       9.92   11.21        6,816    0.95          5.88         369
   0.00        (0.62)      10.84    4.55        7,652    2.05+         5.60+        307
   0.00        (0.31)      10.96   15.01        7,360    1.27(c)       4.88(d)    1,246
   0.00        (0.50)       9.89    4.85        4,909    1.70          4.16         236
   0.00        (1.99)       9.92   10.39        4,473    1.70          5.12         369
   0.00        (0.58)      10.84    4.17        3,925    2.57+         4.22+        307
   0.00        (0.26)      10.96   14.54        3,240    2.49(c)       4.09(d)    1,246
   0.00        (0.50)       9.89    4.82        5,863    1.70          4.16         236
   0.00        (1.99)       9.92   10.39        6,096    1.70          5.12         369
   0.00        (0.58)      10.84    4.17        5,323    2.43+         4.14+        307
   0.00        (0.26)      10.96   14.54        3,459    2.49(c)       4.09(d)    1,246
  $0.00       $(0.88)     $10.63    7.43%  $   29,009    0.95%         4.87%        376%
   0.00        (0.90)      10.74   12.14        9,582    0.95          5.88         280
   0.00        (0.05)      10.41   (1.21)         704    0.97+         4.95+        984
   0.00        (0.81)      10.63    6.69       21,256    1.70          4.14         376
   0.00        (0.81)      10.74   11.29       10,631    1.70          5.13         280
   0.00        (0.04)      10.41   (1.34)       1,221    1.75+         3.73+        984
   0.00        (0.80)      10.63    6.63       29,584    1.70          4.16         376
   0.00        (0.81)      10.74   11.29       17,080    1.70          5.13         280
   0.00        (0.04)      10.41   (1.32)       1,788    1.76+         4.09+        984
</TABLE>
- -------
+ Annualized.
(c) The ratio of expenses to average net assets without the waiver would have
been 1.57%.
(d) The ratio of net investment income to average net assets without the waiver
would have been 4.58%.
(e) The ratio of expenses to average net assets excluding interest expense on
reverse repurchase agreements is 0.90%.
(f) The ratio of expenses to average net assets excluding interest expense on
reverse repurchase agreements is 1.65%.
(g) The ratio of expenses to average net assets excluding interest expense on
reverse repurchase agreements is 1.65%.
                                                                   Prospectus
                                                                              54
<PAGE>


<TABLE>
<CAPTION>
                         Net Asset                 Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or                    Value        Net       and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period                   Beginning  Investment    Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended                    of Period Income (Loss)   Investments    Operations    Income      Income     Capital Gains Capital Gains
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>       <C>            <C>            <C>          <C>        <C>           <C>           <C>
Emerging Markets Bond
 Class A
 03/31/1999               $ 9.67      $ 0.83 (a)      $(2.11)(a)    $(1.28)     $(0.83)     $ 0.00        $ 0.00        $(0.05)
 07/31/1997 - 03/31/1998   10.00        0.44 (a)       (0.18)(a)      0.26       (0.44)       0.00         (0.15)         0.00
 Class B
 03/31/1999                 9.67        0.77 (a)       (2.11)(a)     (1.34)      (0.77)       0.00          0.00         (0.05)
 07/31/1997 - 03/31/1998   10.00        0.40 (a)       (0.20)(a)      0.20       (0.38)       0.00         (0.15)         0.00
 Class C
 03/31/1999                 9.67        0.77 (a)       (2.11)(a)     (1.34)      (0.77)       0.00          0.00         (0.05)
 07/31/1997 - 03/31/1998   10.00        0.38 (a)       (0.18)(a)      0.20       (0.38)       0.00         (0.15)         0.00
High Yield
 Class A
 03/31/1999               $11.66      $ 0.91 (a)      $(0.43)(a)    $ 0.48      $(0.90)     $(0.01)       $ 0.00        $ 0.00
 03/31/1998                11.10        0.93 (a)        0.66 (a)      1.59       (0.94)       0.00          0.00         (0.09)
 01/13/1997 - 03/31/1997   11.18        0.17           (0.05)         0.12       (0.20)       0.00          0.00          0.00
 Class B
 03/31/1999                11.66        0.82 (a)       (0.43)(a)      0.39       (0.81)      (0.01)         0.00          0.00
 03/31/1998                11.10        0.84 (a)        0.66 (a)      1.50       (0.85)       0.00          0.00         (0.09)
 01/13/1997 - 03/31/1997   11.18        0.15           (0.05)         0.10       (0.18)       0.00          0.00          0.00
 Class C
 03/31/1999                11.66        0.82 (a)       (0.43)(a)      0.39       (0.81)      (0.01)         0.00          0.00
 03/31/1998                11.10        0.85 (a)        0.65 (a)      1.50       (0.85)       0.00          0.00         (0.09)
 01/13/1997 - 03/31/1997   11.18        0.15           (0.05)         0.10       (0.18)       0.00          0.00          0.00
Real Return Bond
 Class A
 03/31/1999               $ 9.77      $ 0.43 (a)      $ 0.14 (a)    $ 0.57      $(0.45)     $(0.06)       $ 0.00        $ 0.00
 03/31/1998                 9.93        0.40 (a)        0.03 (a)      0.43       (0.42)      (0.03)        (0.14)         0.00
 01/29/1997 - 03/31/1997   10.00        0.11 (a)       (0.10)(a)      0.01       (0.08)       0.00          0.00          0.00
 Class B
 03/31/1999                 9.77        0.37 (a)        0.12 (a)      0.49       (0.38)      (0.05)         0.00          0.00
 03/31/1998                 9.93        0.33 (a)        0.03 (a)      0.36       (0.36)      (0.02)        (0.14)         0.00
 01/29/1997 - 03/31/1997   10.00        0.09           (0.10)        (0.01)      (0.06)       0.00          0.00          0.00
 Class C
 03/31/1999                 9.77        0.44 (a)        0.08 (a)      0.52       (0.40)      (0.06)         0.00          0.00
 03/31/1998                 9.93        0.35 (a)        0.04 (a)      0.39       (0.38)      (0.03)        (0.14)         0.00
 01/29/1997 - 03/31/1997   10.00        0.09           (0.10)        (0.01)      (0.06)       0.00          0.00          0.00
StocksPLUS
 Class A
 03/31/1999               $14.06      $ 0.93 (a)      $ 1.29 (a)    $ 2.22      $(0.78)     $ 0.00        $(1.24)       $ 0.00
 03/31/1998                11.46        1.66 (a)        3.41 (a)      5.07       (1.38)       0.00         (1.09)         0.00
 01/20/1997 - 03/31/1997   11.91       (0.10)          (0.20)        (0.30)      (0.15)       0.00          0.00          0.00
 Class B
 03/31/1999                14.01        0.84 (a)        1.26 (a)      2.10       (0.69)       0.00         (1.24)         0.00
 03/31/1998                11.44        1.61 (a)        3.35 (a)      4.96       (1.30)       0.00         (1.09)         0.00
 01/20/1997 - 03/31/1997   11.91       (0.13)          (0.20)        (0.33)      (0.14)       0.00          0.00          0.00
 Class C
 03/31/1999                14.03        0.86 (a)        1.28 (a)      2.14       (0.72)       0.00         (1.24)         0.00
 03/31/1998                11.45        1.64 (a)        3.35 (a)      4.99       (1.32)       0.00         (1.09)         0.00
 01/20/1997 - 03/31/1997   11.91       (0.12)          (0.20)        (0.32)      (0.14)       0.00          0.00          0.00
</TABLE>

  Pacific Investment Management Series
55
<PAGE>


<TABLE>
<CAPTION>
                          Net Asset          Net Assets  Ratio of     Ratio of Net
Tax Basis                   Value               End     Expenses to    Investment     Portfolio
  Return        Total        End    Total    of Period    Average   Income to Average Turnover
of Capital  Distributions of Period Return    (000's)   Net Assets     Net Assets       Rate
- -----------------------------------------------------------------------------------------------
<S>         <C>           <C>       <C>      <C>        <C>         <C>               <C>
  $0.00        $(0.88)     $ 7.51   (12.90)%  $    172     1.25%           10.26%        315%
   0.00         (0.59)       9.67     2.84         317     1.26+            6.93+        695
   0.00         (0.82)       7.51   (13.58)        398     2.00             9.68         315
   0.00         (0.53)       9.67     2.29         304     2.01+            6.33+        695
   0.00         (0.82)       7.51   (13.57)        229     2.00             9.79         315%
   0.00         (0.53)       9.67     2.29         136     2.01+            6.11+        695
  $0.00        $(0.91)     $11.23     4.32 %  $155,466     0.90%            7.94%         39%
   0.00         (1.03)      11.66    14.80      70,858     0.90             8.02          37
   0.00         (0.20)      11.10     1.06      28,873     0.92+            8.28+         67
   0.00         (0.82)      11.23     3.54     286,198     1.65             7.21          39
   0.00         (0.94)      11.66    13.94     156,099     1.65             7.27          37
   0.00         (0.18)      11.10     0.86      60,269     1.67+            7.52+         67
   0.00         (0.82)      11.23     3.55     370,861     1.65             7.24          39
   0.00         (0.94)      11.66    13.95     284,836     1.65             7.36          37
   0.00         (0.18)      11.10     0.88     205,297     1.68+            7.56+         67
  $0.00        $(0.51)     $ 9.83     5.99 %  $  6,250     0.92%            4.40%        438%
   0.00         (0.59)       9.77     4.12         370     0.92             4.06         967
   0.00         (0.08)       9.93     0.15           1     0.90+            6.14+        160
   0.00         (0.43)       9.83     5.19       3,646     1.68             3.72         438
   0.00         (0.52)       9.77     3.50       1,496     1.67             3.32         967
   0.00         (0.06)       9.93    (0.08)        509     1.59+            3.43+        160
   0.00         (0.46)       9.83     5.46       2,534     1.43             4.49         438
   0.00         (0.55)       9.77     3.73         490     1.42             3.56         967
   0.00         (0.06)       9.93    (0.07)        148     1.62+            5.13+        160
  $0.00        $(2.02)     $14.26    17.07 %  $148,748     1.05%            6.66%         81%
   0.00         (2.47)      14.06    47.07      62,970     1.05            13.34          30
   0.00         (0.15)      11.46    (2.59)      5,790     1.10+         (10.69)+         47
   0.00         (1.93)      14.18    16.21     281,930     1.80             6.05          81
   0.00         (2.39)      14.01    46.11      99,039     1.80            12.60          30
   0.00         (0.14)      11.44    (2.81)      8,281     1.88+          (15.13)+        47
   0.00         (1.96)      14.21    16.48     245,088     1.55             6.19          81
   0.00         (2.41)      14.03    46.38      96,960     1.55            12.85          30
   0.00         (0.14)      11.45    (2.71)     11,254     1.65+          (12.79)+        47
</TABLE>
- -------
+ Annualized.
                                                                   Prospectus
                                                                              56
<PAGE>

            Appendix A
            Description of Securities Ratings

            A Fund's investments may range in quality from securities rated in
            the lowest category in which the Fund is 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 Fund'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 ("Junk Bonds") are
            those rated lower than Baa by Moody's or BBB by S&P and comparable
            securities. They are considered predominantly 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     Corporate and Municipal Bond Ratings
Investors
Service,     Aaa: Bonds which are rated Aaa are judged to be of the best
Inc.        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.

             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
            indicates a mid-range ranking; and the modifier 3 indicates that
            the issue ranks in the lower end of its generic rating category.

            Corporate Short-Term Debt Ratings

            Moody's short-term debt ratings are opinions of the ability 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:

A-1
  Pacific Investment Management Series
<PAGE>

             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    Corporate and Municipal Bond Ratings
& Poor's
Ratings     Investment Grade
Services     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 than
            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.

             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.
                                                                   Prospectus
                                                                             A-2
<PAGE>

             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  An S&P commercial paper rating is a current assessment of the
Paper       likelihood of timely payment of debt having an original maturity
Rating      of no more than 365 days. Ratings are graded into several
Definitions 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 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 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.

A-3
  Pacific Investment Management Series
<PAGE>

            PIMCO Funds: Pacific Investment Management Series

            The Trust's Statement of Additional Information ("SAI") and annual
            and semi-annual reports to shareholders include additional
            information about the Funds. The SAI and the financial statements
            included in the Funds' most recent annual report to shareholders
            are incorporated by reference into this Prospectus, which means
            they are part of this Prospectus for legal purposes. The Funds'
            annual report discusses the market conditions and investment
            strategies that significantly affected each Fund's performance
            during its last fiscal year.

            The SAI includes the PIMCO Funds Shareholders' Guide for Class A,
            B and C Shares, a separate booklet which contains more detailed
            information about Fund purchase, redemption and exchange options
            and procedures and other information about the Funds. You can get
            a free copy of the Guide together with or separately from the rest
            of the SAI.

            You may get free copies of any of these materials, request other
            information about a Fund, or make shareholder inquiries by calling
            1-800-426-0107, or by writing to:

              PIMCO Funds Distributors LLC
              2187 Atlantic Street
              Stamford, Connecticut 06902

            You may review and copy information about the Trust, including its
            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
            Trust on the Commission's Web site at www.sec.gov. You may get
            copies of this information, with payment of a duplication fee, by
            writing the Public Reference Section of the Commission,
            Washington, D.C. 20549-0102, or by electronic request at
            [email protected].

            You can also visit our Web site at www.pimcofunds.com for
            additional information about the Funds.

            [LOGO OF PIMCO FUNDS APPEARS HERE]

            Investment Company Act File no. 811-5028
<PAGE>

PIMCO Funds:
Pacific Investment
Management Series
- --------------------------------------------------------------------------------
INVESTMENT ADVISER AND ADMINISTRATOR
PIMCO, 840 Newport Center Drive, Suite 300,
Newport Beach, CA 92660
- --------------------------------------------------------------------------------
DISTRIBUTOR
PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT 06902-6896
- --------------------------------------------------------------------------------
CUSTODIAN
State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, Mo 64105
- --------------------------------------------------------------------------------
SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT
PFPC Inc., P.O. Box 9688, Providence, RI 02940-9688
- --------------------------------------------------------------------------------
INDEPENDENT ACCOUNTANTS
PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO 64105
- --------------------------------------------------------------------------------
LEGAL COUNSEL
Dechert Price & Rhoads, 1775 Eye Street N.W., Washington, D.C. 20006-2401
- --------------------------------------------------------------------------------
For further information about the PIMCO Funds, call 1-800-426-0107 or visit our
Web site at http://www.pimcofunds.com.

<PAGE>
PIMCO Funds is on the Web
www.pimcofunds.com


A Partial List of What's Available:

On-line Account Access

Daily share Prices

Daily Manager Commentary

Current and Historical Fund Performance

Lipper Rankings

Morningstar Ratings

Listing of Fund Portfolio Holdings

Risk Analysis

Fund Manager Bios

Downloadable Literature Section

On-line Requests for Literature by Mail

Resources for Investment Professionals


Through the PIMCO funds Web site, at www.pimcofunds.com, you and your financial
advisor have around-the-clock access to the most timely and comprehensive
information available on PIMCO funds.
     In addition, the site includes daily commentary from our fund managers,
with insights on the economy and other factors affecting the stock and bond
markets.
     And now you can access your account--securely--on-line. This feature is
available to shareholders with direct accounts (a direct account is one where
the shareholder receives statements directly form PIMCO Funds.)

                             [GRAPHIC OF WEB SITE]

You'll find the site to be informative and easy-to-use. It's divided into three
main sections: Investment Insight, Fund Information and Resources.

Investment Insight
The Investment Insight section provides an overview of the investment management
firms under the PIMCO Advisors L.P. umbrella. You'll find an explanation of each
firm's investment process, biographies of the investment team, manager updates
and more.

Fund Information
In the Fund Information section you'll access detailed profiles of all the PIMCO
Funds, including current and historical performance, Lipper rankings and
Morningstar ratings.
     Additionally, we provide a summary of a fund's portfolio--complete with
risk analysis data. You can also obtain daily fund share prices. Read read the
relevant prospectus carefully before you investment in any PIMCO Fund.

Resources
Our Resources section features a variety of useful information, including:

     an on-line document library with applications and prospectuses that you can
view and print

     a literature-by-mail "catalog," so you can order free materials

     information about our convenient shareholder services, such as Auto-Invest,
Fund Link and our 24-Hour Telephone Information System

     a listing of the features and benefits of the retirement plans offered by
PIMCO funds

Questions?
We're sure you'll find the PIMCO Funds Web site to be an invaluable tool. If you
have any questions about the site, call us at 1-800-426-0107.
     Or, send us e-mail at [email protected].

PZ000.3/00                                          Not part of the Prospectus

- --------------------------------------------------------------------------------
     PIMCO FUNDS

PIMCO Funds Distributors LLC

2187 Atlantic Street
Stamford, CT 06902-6896
<PAGE>

PIMCO Funds Prospectus

Pacific Investment Management Series

April 5, 2000

Share Class
D

SHORT DURATION BOND FUNDS
Short-Term Fund
Low Duration Fund

INTERMEDIATE DURATION BOND FUNDS
Total Return Fund
Total Return Mortgage Fund

INTERNATIONAL BOND FUNDS
Foreign Bond Fund
Emerging Markets Bond Fund

HIGH YIELD BOND FUNDS
High Yield Fund

INFLATION-INDEXED BOND FUNDS
Real Return Bond Fund

TAX-EXEMPT BOND FUNDS
Short Duration Municipal
Income FUnd

Municipal Bond Fund

California Intermediate
Municipal Bond Fund

New York Intermediate
Municipal Bond Fund

CONVERTIBLE FUNDS
Convertible Fund

STOCK AND BOND FUNDS
Strategic Balanced Fund

ENHANCED INDEX STOCK FUNDS
StockPLUS Fund

This cover is not part of the Prospectus.                                  PIMCO
                                                                           FUNDS

<PAGE>

            PIMCO Funds Prospectus

PIMCO       This Prospectus describes 15 mutual funds offered by PIMCO Funds:
Funds:      Pacific Investment Management Series. The Funds provide access to
Pacific     the professional investment advisory services offered by Pacific
Investment  Investment Management Company ("PIMCO"). As of December 31, 1999,
Management  PIMCO managed approximately $186 billion in assets. The firm's
Series      institutional heritage is reflected in the PIMCO Funds offered in
            this Prospectus.
April 5,
2000

            The Funds offer Class D shares in this Prospectus. This Prospectus
            explains what you should know about the Funds before you invest.
            Please read it carefully.

Share       The Securities and Exchange Commission has not approved or
Class       disapproved these securities, or determined if this Prospectus is
D           truthful or complete. Any representation to the contrary is a
            criminal offense.

1 PIMCO Funds: Pacific Investment Management Series
<PAGE>


            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summaries
           California Intermediate Municipal Bond Fund....................   5
           Convertible Fund...............................................   7
           Emerging Markets Bond Fund.....................................   9
           Foreign Bond Fund..............................................  11
           High Yield Fund................................................  13
           Low Duration Fund..............................................  15
           Municipal Bond Fund............................................  17
           New York Intermediate Municipal Bond Fund......................  19
           Real Return Bond Fund..........................................  21
           Short Duration Municipal Income Fund...........................  23
           Short-Term Fund................................................  25
           StocksPLUS Fund................................................  27
           Strategic Balanced Fund........................................  29
           Total Return Fund..............................................  31
           Total Return Mortgage Fund.....................................  33
         Summary of Principal Risks.......................................  35
         Management of the Funds..........................................  37
         How to Buy and Sell Shares.......................................  40
         How Fund Shares are Priced.......................................  42
         Fund Distributions...............................................  42
         Tax Consequences.................................................  43
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  44
         Financial Highlights.............................................  53
         Appendix A-Description of Securities Ratings..................... A-1
</TABLE>
                                                                   Prospectus  2
<PAGE>

            Summary Information

 The table below compares certain investment characteristics of the Funds.
 Other important characteristics are described in the individual Fund
 Summaries beginning on page 5. Following the table are certain key concepts
 which are used throughout the prospectus.

<TABLE>
<CAPTION>
                                                          Main Investments                              Duration
 -----------------------------------------------------------------------------------------------------------------
 <C>               <C>                                    <S>                                           <C>
 Short Duration    Short-Term                             Money market                                  0-1 year
 Bond Funds                                               instruments and short
                                                          maturity fixed income
                                                          securities
                   -----------------------------------------------------------------------------------------------
                   Low Duration                           Short maturity fixed                          1-3 years
                                                          income securities
 -----------------------------------------------------------------------------------------------------------------
 Intermediate      Total Return                           Intermediate maturity                         3-6 years
 Duration Bond                                            fixed income
 Funds                                                    securities
                   -----------------------------------------------------------------------------------------------
                   Total Return Mortgage                  Intermediate maturity                         2-6 years
                                                          mortgage-related
                                                          fixed income
                                                          securities
 -----------------------------------------------------------------------------------------------------------------
 International     Foreign Bond                           Intermediate maturity                         3-7 years
 Bond Funds                                               hedged non-U.S. fixed
                                                          income securities
                   -----------------------------------------------------------------------------------------------
                   Emerging Markets Bond                  Emerging market fixed                         0-8 years
                                                          income securities
 -----------------------------------------------------------------------------------------------------------------
 High Yield        High Yield                             Higher yielding fixed                         2-6 years
 Bond Funds                                               income securities
 -----------------------------------------------------------------------------------------------------------------
 Tax Exempt        Short Duration Municipal Income        Short and intermediate maturity municipal     0-2 years
 Bond Funds                                               securities (exempt from federal income tax)
                   -----------------------------------------------------------------------------------------------
                   Municipal Bond                         Intermediate and                              3-10 years
                                                          long-term maturity
                                                          municipal securities
                                                          (exempt from federal
                                                          income tax)
                   -----------------------------------------------------------------------------------------------
                   California Intermediate Municipal Bond Intermediate maturity                         3-7 years
                                                          municipal securities
                                                          (exempt from federal and California
                                                          income tax)
                   -----------------------------------------------------------------------------------------------
                   New York Intermediate Municipal Bond   Intermediate maturity                         3-7 years
                                                          municipal securities
                                                          (exempt from federal
                                                          and New York income
                                                          tax)
 -----------------------------------------------------------------------------------------------------------------
 Inflation-Indexed Real Return Bond                       Inflation-indexed                             N/A
 Bond Funds                                               fixed income
                                                          securities
 -----------------------------------------------------------------------------------------------------------------
 Convertible       Convertible                            Convertible                                   N/A
 Funds                                                    securities
 -----------------------------------------------------------------------------------------------------------------
 Stock and Bond    Strategic Balanced                     Intermediate maturity                         0-6 years
 Funds                                                    fixed income
                                                          securities and
                                                          S&P 500 stock index
                                                          derivatives
 -----------------------------------------------------------------------------------------------------------------
 Enhanced Index    StocksPLUS                             S&P 500 stock index                           0-1 year
 Stock Funds                                              derivatives backed by
                                                          a portfolio of short-
                                                          term fixed income
                                                          securities
 -----------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                   Non-U.S.
                                                                   Dollar
                                                                   Denominated
                                               Credit Quality(1)   Securities(2)
 -----------------------------------------------------------------------------------------------------------------
                                               <C>                 <C>
                                               B to Aaa; max 10%     0-5%(3)
                                               below Baa
                   -----------------------------------------------------------------------------------------------
                                               B to Aaa; max 10%     0-20%(3)
                                               below Baa
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; max 10%     0-20%(3)
                                               below Baa
                   -----------------------------------------------------------------------------------------------
                                               Baa to Aaa; max 10%   0%
                                               below Aaa
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; max         Greater than or equal to 85%(5)
                                               10% below Baa
                   -----------------------------------------------------------------------------------------------
                                               B to Aaa              Greater than or equal to 80%(5)
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; min 65%     0-15%(4)
                                               below Baa
 -----------------------------------------------------------------------------------------------------------------
                                               Baa to Aaa            0%
                   -----------------------------------------------------------------------------------------------
                                               Ba to Aaa; max 10%    0%
                                               below Baa
                   -----------------------------------------------------------------------------------------------
                                               B to Aaa; max         0%
                                               10% below Baa
                   -----------------------------------------------------------------------------------------------
                                               B to Aaa; max 10%     0%
                                               below Baa
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; max 10%     0-20%(3)
                                               below Baa
 -----------------------------------------------------------------------------------------------------------------
                                               Caa to Aaa; max       0-20%(3)
                                               40% below Baa
                                               and 10% below B
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; max         0-20%(3)
                                               10% below Baa
 -----------------------------------------------------------------------------------------------------------------
                                               B to Aaa; max         0-20%(3)
                                               10% below Baa
 -----------------------------------------------------------------------------------------------------------------
</TABLE>
 (1)   As rated by Moody's Investors Service, Inc., or equivalently rated by
       Standard & Poor's Ratings Services, or if unrated, determined by PIMCO
       to be of comparable quality.
 (2)   Each Fund (except the Short-Duration Municipal Income, Municipal Bond,
       California Intermediate Municipal Bond and New York Intermediate
       Municipal Bond Funds) may invest beyond these limits in U.S. dollar-
       denominated securities of non-U.S. issuers.
 (3)   The percentage limitation relates to non-U.S. dollar-denominated
       securities.
 (4)   The percentage limitation relates to euro-denominated securities.
 (5)   The percentage limitation relates to securities of foreign issuers
       denominated in any currency.

3  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            Summary Information (continued)

Fixed       The "Fixed Income Funds" are the Short-Term, Low Duration, Total
Income      Return, Total Return Mortgage, Foreign Bond, Emerging Markets
Instruments Bond, High Yield, Short Duration Municipal Income, Municipal Bond,
            California Intermediate Municipal Bond, New York Intermediate
            Municipal Bond, and Real Return Bond Funds. Each Fixed Income Fund
            differs from the others primarily in the length of the Fund's
            duration or the proportion of its investments in certain types of
            fixed income securities. Each Fixed Income Fund invests at least
            65% of its assets in "Fixed Income Instruments," which as used in
            this Prospectus includes:

            .  securities issued or guaranteed by the U.S. Government, its
               agencies or government-sponsored enterprises ("U.S. Government
               Securities");
            .  corporate debt securities of U.S. and non-U.S. issuers,
               including convertible securities and corporate commercial
               paper;
            .  mortgage-backed and other asset-backed securities;
            .  inflation-indexed bonds issued both by governments and
               corporations;
            .  structured notes, including hybrid or "indexed" securities,
               event-linked bonds and loan participations;
            .  delayed funding loans and revolving credit facilities;
            .  bank certificates of deposit, fixed time deposits and bankers'
               acceptances;
            .  repurchase agreements and reverse repurchase agreements;
            .  debt securities issued by states or local governments and their
               agencies, authorities and other instrumentalities;
            .  obligations of non-U.S. governments or their subdivisions,
               agencies and instrumentalities; and
            .  obligations of international agencies or supranational
               entities.

Duration    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 Fund with a longer average portfolio duration
            will be more sensitive to changes in interest rates than a Fund
            with a shorter average portfolio duration.

Credit      In this Prospectus, references are made to credit ratings of debt
Ratings     securities which measure an issuer's expected ability to pay
            principal and interest over time. Credit ratings are determined by
            rating organizations, such as Standard & Poor's Rating Service
            ("S&P") or Moody's Investors Service, Inc. ("Moody's"). The
            following terms are generally used to describe the credit quality
            of debt securities depending on the security's credit rating or,
            if unrated, credit quality as determined by PIMCO:

            . high quality
            . investment grade
            . below investment grade ("high yield securities" or "junk bonds")

            For a further description of credit ratings, see "Appendix A--
            Description of Securities Ratings."

Fund        The Funds provide a broad range of investment choices. The
Descrip-    following summaries identify each Fund's investment objective,
tions,      principal investments and strategies, principal risks, performance
Perfor-     information and fees and expenses. A more detailed "Summary of
mance       Principal Risks" describing principal risks of investing in the
and Fees    Funds begins after the Fund Summaries.

             It is possible to lose money on investments in the Funds.

             An investment in a Fund is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.
                                                                   Prospectus  4
<PAGE>

            PIMCO California Intermediate Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Intermediate         B to Aaa; maximum
and           current income         maturity             10% below Baa
Strategies    exempt from            municipal
              federal and            securities
              California income      (exempt from
              tax. Capital           federal and          Dividend Frequency
              appreciation is a      California income    Declared daily and
              secondary              tax)                 distributed monthly
              objective.
                                     Average Portfolio
              Fund Category          Duration
              Tax Exempt Bond        3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund invests under normal circumstances at least 65% of
            its assets in debt securities whose interest is, in the opinion of
            bond counsel for the issuer at the time of issuance, exempt from
            regular federal income tax and California income tax ("California
            Municipal Bonds"). California Municipal Bonds generally are issued
            by or on behalf of the State of California and its political
            subdivisions, financing authorities and their agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame based on the PIMCO's forecast
            for interest rates. The Fund will seek income that is high
            relative to prevailing rates from Municipal Bonds. Capital
            appreciation, if any, generally arises from decreases in interest
            rates or improving credit fundamentals for a particular state,
            municipality or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

              . Interest Rate Risk   . Issuer Risk          . Mortgage Risk
              . Credit Risk          . Issuer Non-          . Leveraging Risk
              . California State        Diversification     . Management Risk
                 Specific Risk          Risk
              . Market Risk          . Liquidity Risk
                                     . Derivatives Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

5 PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO California Intermediate Municipal Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         ---------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.25%        0.25%               0.35%           0.85%
         ---------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.60% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other expenses reflects the portion of Administrative Fee paid
                by the class that is not reflected under Distribution and/or
                Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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>

                         Year 1              Year 3               Year 5                Year 10
         --------------------------------------------------------------------------------------
         <S>             <C>                  <C>                  <C>
         Class D         $87                  $271                 $471                  $1,049
         --------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus  6
<PAGE>

            PIMCO Convertible Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Convertible         Caa to Aaa; maximum
and           total return,         securities          40% below Baa and 10%
Strategies    consistent with                           below B
              prudent               Average Portfolio
              investment            Duration             Dividend Frequency
              management            N/A                  Declared and
                                                         distributed quarterly
              Fund Category
              Convertible

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of convertible securities. Convertible
            securities, which are typically issued by small to mid-sized
            capitalization companies, include, but are not limited to:
            corporate bonds, debentures, notes or preferred stocks and their
            hybrids that can be converted into (exchanged for) common stock or
            other securities, such as warrants or options, which provide an
            opportunity for equity participation.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 40% of its assets in high yield securities
            ("junk bonds") rated Caa or higher by Moody's or CCC or higher by
            S&P or, if unrated, determined by PIMCO to be of comparable
            quality. The Fund may only invest up to 10% of its assets in
            convertible securities rated Caa or CCC or, if unrated, determined
            by PIMCO to be of comparable quality. The Fund may also invest up
            to 20% of its assets in securities denominated in foreign
            currencies, and may invest beyond this limit in U.S. dollar-
            denominated securities of foreign issuers. In addition, the Fund
            may invest up to 35% of its assets in common stocks or in other
            Fixed Income Instruments.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements and may
            invest in mortgage- or asset-backed securities. The Fund may lend
            its portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's investments, plus capital appreciation arising from
            increases in the market value of the Fund's holdings.

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

              .Market Risk          .High Yield Risk      .Foreign Investment
              .Issuer Risk          .Derivatives Risk      Risk
              .Interest Rate Risk   .Liquidity Risk       .Currency Risk
              .Credit Risk          .Smaller Company Risk .Leveraging Risk
                                                          .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance As the Fund commenced operations in April, 1999, it does not yet
Information have a full calendar year of performance. Thus, no bar chart or
            annual returns table is included for the Fund.

7 PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Convertible Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)      None

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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.40%        0.25%               0.40%           1.05%
         --------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.65% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other expenses reflects the portion of Administrative Fee paid
                by the class that is not reflected under Distribution and/or
                Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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>

                         Year 1               Year 3               Year 5               Year 10
            -----------------------------------------------------------------------------------
         <S>             <C>                  <C>                  <C>                   <C>
         Class D         $107                 $334                 $579                  $1,283
            -----------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus  8
<PAGE>

            PIMCO Emerging Markets Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus            Credit Quality
Investments   Seeks maximum          Emerging market fixed income securities
and           total return,                                B to Aaa
Strategies    consistent with        Average Portfolio
              preservation of        Duration              Dividend Frequency
              capital and
              prudent                0-8 years             Declared daily and
              investment                                   distributed monthly
              management

              Fund Category
              International
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in Fixed
            Income Instruments of issuers that economically are tied to
            countries with emerging securities markets. Such securities may be
            denominated in non-U.S. currencies and the U.S. dollar. A security
            is economically tied to an emerging market country if it is
            principally traded on the country's securities markets, or the
            issuer is organized or principally operates in the country,
            derives a majority of its income from its operations within the
            country, or has a majority of its assets in the country. The
            average portfolio duration of the Fund varies based on PIMCO's
            forecast for interest rates and, under normal market conditions,
            is not expected to exceed eight years.

             PIMCO has broad discretion to identify and invest in countries
            that it considers to qualify as emerging securities markets.
            However, PIMCO generally considers an emerging securities market
            to be one located in any country that is defined as an emerging or
            developing economy by the World Bank or its related organizations,
            or the United Nations or its authorities. The Fund emphasizes
            countries with relatively low gross national product per capita
            and with the potential for rapid economic growth. PIMCO will
            select the Fund's country and currency composition based on its
            evaluation of relative interest rates, inflation rates, exchange
            rates, monetary and fiscal policies, trade and current account
            balances, and any other specific factors PIMCO believes to be
            relevant. The Fund likely will concentrate its investments in
            Asia, Africa, the Middle East, Latin America and the developing
            countries of Europe. The Fund may invest in securities whose
            return is based on the return of an emerging securities market,
            such as a derivative instrument rather than investing directly in
            securities of issuers from emerging markets.

             The Fund may invest substantially all of its assets in high yield
            securities ("junk bonds") rated B or higher by Moody's or S&P, or,
            if unrated, determined by PIMCO to be of comparable quality. The
            Fund is non-diversified, which means that it may concentrate its
            assets in a smaller number of issuers than a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Emerging Markets Risk .Liquidity Risk
              .Credit Risk           .Foreign Investment
              .High Yield Risk        Risk                  .Derivatives Risk
              .Market Risk           .Currency Risk         .Leveraging Risk
              .Issuer Risk           .Issuer Non-Diversi-   .Management Risk
                                      fication Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's
            Institutional Class Shares, which are offered in a different
            prospectus. This is because the Fund has not offered Class D
            shares for a full calendar year. Although Class D and
            Institutional Class shares would have similar annual returns
            (because all the Fund's shares represent interests in the same
            portfolio of securities), Class D performance would be lower than
            Institutional Class performance because of the higher expenses
            paid by Class D shares.

             The Average Annual Total Returns table also shows estimated
            historical performance for Class D shares. The performance of the
            Class D Shares is based on the performance of the Fund's
            Institutional Class shares, adjusted to reflect the actual 12b-
            1/service fees and other expenses paid by Class D shares. Past
            performance is no guarantee of future results.

9 PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Emerging Markets Bond Fund (continued)

            Calendar Year Total Returns -- Institutional Class

                           -11.76  26.58                    Highest and Lowest
                           ------  -----                    Quarter Returns
                            '98     '99                     (for periods shown
                                                            in the bar chart)
                                                            --------------------
                                                            Highest (10/1/98-
                                                            12/31/98)     12.27%
                                                            --------------------
                                                            Lowest (7/1/98-
                                                            9/30/98)     -21.05%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
<CAPTION>
                                                                 Fund Inception
                                                          1 Year (7/31/97)
         ----------------------------------------------------------------------
         <S>                                              <C>    <C>
         Class D                                          26.08%  3.04%
         ----------------------------------------------------------------------
         J.P. Morgan Emerging Markets Bond Index Plus(1)  25.99%  2.52%
         ----------------------------------------------------------------------
         Lipper Emerging Market Debt Fund Avg(2)          24.51% -1.10%
         ----------------------------------------------------------------------
</TABLE>

            (1)  The J.P. Morgan Emerging Markets Bond Index Plus is an
                 unmanaged index which tracks the total returns for external-
                 currency denominated debt instruments of emerging markets. It
                 is not possible to invest directly in the index.
            (2)  The Lipper Emerging Market Debt Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that seek either current income or
                 total return by investing at least 65% of total assets in
                 emerging market debt securities. It does not take into
                 account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.45%        0.25%               0.55%           1.25%
         --------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.80% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other expenses reflects the portion of Administrative Fee paid
                by the class that is not reflected under Distribution and/or
                Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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>

                        Year 1               Year 3               Year 5                Year 10
            -----------------------------------------------------------------------------------
         <S>             <C>                  <C>                  <C>                   <C>
         Class D         $127                 $397                 $686                  $1,511
            -----------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              10
<PAGE>

            PIMCO Foreign Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         B to Aaa; maximum
and           total return,          maturity hedged      10% below Baa
Strategies    consistent with        non-U.S. fixed
              preservation of        income securities    Dividend Frequency
              capital and                                 Declared daily and
              prudent                Average Portfolio    distributed monthly
              investment             Duration
              management             3-7 years

              Fund Category
              International
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 85% of its assets in Fixed
            Income Instruments of issuers located outside the United States,
            representing at least three foreign countries, which may be
            represented by futures contracts (including related options) with
            respect to such securities, and options on such securities. Such
            securities normally are denominated in major foreign currencies or
            baskets of foreign currencies (such as the euro). The Fund 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.

             PIMCO selects the Fund's foreign country and currency
            compositions based on an evaluation of various factors, including,
            but not limited to relative interest rates, exchange rates,
            monetary and fiscal policies, trade and current account balances.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            assets in high yield securities ("junk bonds") rated B or higher
            by Moody's or S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund is non-diversified, which means that
            it may concentrate its assets in a smaller number of issuers than
            a diversified Fund.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk  .Foreign Investment Risk .Mortgage Risk
              .Credit Risk         .Currency Risk           .Derivatives Risk
              .Market Risk         .Issuer Non-Diversi-     .Leveraging Risk
              .Issuer Risk           fication Risk          .Management Risk
                                   .Liquidity Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

11  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Foreign Bond Fund (continued)

            Calendar Year Total Returns -- Class D

                     [GRAPH]                                Highest and Lowest
                                                            Quarter Returns
15.92%  -7.72%  20.68%  18.42%  9.14%  9.55%  1.12%         (for periods shown
- ------  ------  ------  ------  -----  -----  -----         in the bar chart)
 '93     '94     '95     '96     '97    '98    '99          --------------------
                                                            Highest (10/1/95-
                                                            12/31/95)      7.12%
                                                            --------------------
                                                            Lowest (1/1/94-
                                                            3/31/94)      -4.32%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>

                                                                  Fund Inception
                                                  1 Year  5 Years (12/3/92)(3)
         -----------------------------------------------------------------------
         <S>                                      <C>     <C>     <C>
         Class D                                   1.12%  11.56%   9.29%
         -----------------------------------------------------------------------
         J.P. Morgan Non-U.S. Index (Hedged)(1)    2.48%  11.14%   9.11%
         -----------------------------------------------------------------------
         Lipper International Income Fund Avg(2)   -4.57%  6.45%   6.06%
         -----------------------------------------------------------------------
</TABLE>

            (1) The J.P. Morgan Non-U.S. Index (Hedged) in an unmanaged index
                representative of the total return performance in U.S. dollars
                of major non-U.S. bond markets with an average duration of
                5.62 years as of 12/31/99. It is not possible to invest
                directly in the index.
            (2) The Lipper International Income Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest primarily in U.S. dollar and non-
                U.S. dollar debt securities of issuers located in at least
                three countries, excluding the United States, except in
                periods of market weakness. It does not take into account
                sales charges.
            (3) The Fund began operations on 12/3/92. Index comparisons began
                on 11/30/92.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.25%        0.25%               0.45%           0.95%
         --------------------------------------------------------------------------
</TABLE>

            (1)  The Fund's administration agreement includes a plan for Class
                 D shares that has been adopted in conformity with the
                 requirements set forth in Rule 12b-1 under the Investment
                 Company Act of 1940. Up to 0.25% per year of the total fees
                 paid under the administration agreement may be distribution
                 and/or service (12b-1) fees. The Fund will pay a total of
                 0.70% per year under the administration agreement regardless
                 of whether a portion or none of the 0.25% authorized under
                 the plan is paid under the plan. Please see "Management of
                 the Funds--Investment Adviser and Administrator--
                 Administrative Fees" for details. The Fund intends to treat
                 any fees paid under the plan as "service fees" for purposes
                 of applicable rules of the National Association of Securities
                 Dealers, Inc. (the "NASD"). To the extent that such fees are
                 deemed not to be "service fees," Class D shareholders may,
                 depending on the length of time the shares are held, pay more
                 than the economic equivalent of the maximum front-end sales
                 charges permitted by relevant rules of the NASD.
            (2)  Other Expenses reflects the portion of the Administrative Fee
                 paid by the class that is not reflected under Distribution
                 and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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>

                   Year 1        Year 3             Year 5           Year 10
         -----------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $97          $303                $525            $1,166
         -----------------------------------------------------------------------
</TABLE>
                                                                 Prospectus   12
<PAGE>

            PIMCO High Yield Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Higher yielding      B to Aaa; minimum
and           total return,          fixed income         65% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             2-6 years
              management

              Fund
              Category
              High Yield Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of high yield securities ("junk bonds")
            rated below investment grade but rated at least B by Moody's or
            S&P, or, if unrated, determined by PIMCO to be of comparable
            quality. The remainder of the Fund's assets may be invested in
            investment grade Fixed Income Instruments. The average portfolio
            duration of this Fund normally varies within a two- to six-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            may invest up to 15% of its assets in euro-denominated securities
            and may invest without limit in U.S. dollar-denominated securities
            of foreign issuers. The Fund normally will hedge at least 75% of
            its exposure to the euro to reduce the risk of loss due to
            fluctuations in currency exchange rates.

             The Fund may invest up to 15% of its assets in derivative
            instruments, such as options, futures contracts or swap
            agreements. The Fund may invest all of its assets in mortgage or
            asset backed securities. The Fund may lend its portfolio
            securities to brokers, dealers and other financial institutions to
            earn income. The Fund may seek to obtain market exposure to the
            securities in which it primarily invests by entering into a series
            of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The "total return"
            sought by the Fund consists of income earned on the Fund's
            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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Issuer Risk           .Foreign Investment
              .Credit Risk           .Liquidity Risk         Risk
              .High Yield Risk       .Derivatives Risk      .Currency Risk
              .Market Risk           .Mortgage Risk         .Leveraging Risk
                                                            .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

13  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO High Yield Fund (continued)

            Calendar Year Total Returns -- Class D


                      [GRAPH]                               Highest and Lowest
                                                            Quarter Returns
  '93    '94     '95     '96     '97    '98    '99          (for periods shown
  ---    ---     ---     ---     ---    ---    ---          in the bar chart)
18.26%  2.01%  20.23%  11.28%  12.82%  6.15%  2.43%         --------------------
                                                            Highest (1/1/93-
                                                            3/31/93)       6.17%
                                                            --------------------
                                                            Lowest (7/1/98-
                                                            9/30/98)      -1.86%

                 Calendar Year End (through 12/31)

Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>

                                                               Fund Inception
                                                1 Year 5 Years (12/16/92)(3)
         --------------------------------------------------------------------
         <S>                                    <C>    <C>     <C>
         Class D                                 2.43% 10.42%  10.22%
         --------------------------------------------------------------------
         Lehman Brothers BB Intermediate
          Corporate Index(1)                     2.20%  9.38%   8.85%
         --------------------------------------------------------------------
         Lipper High Current Yield Fund Avg(2)   4.53%  8.84%   8.65%
         --------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers BB Intermediate Corporate Index is an
                unmanaged index comprised of various fixed income securities
                rated BB with an average duration of 4.40 years as of
                12/31/99. It is not possible to invest directly in the index.
            (2) The Lipper High Current Yield Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that aim at high (relative) current yield from
                fixed income securities, have not quality or maturity
                restrictions, and tend to invest in lower grade debt issues.
                It does not take into account sales charges.
            (3) The Fund began operations on 12/16/92. Index comparisons began
                on 12/31/92.

- --------------------------------------------------------------------------------
Fees and   These tables describe the fees and expenses you may pay if you buy
Expenses   and hold Class D shares of the Fund:
of the
Fund
            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.25%        0.25%               0.40%           0.90%
         --------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.65% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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>

                    Year 1       Year 3              Year 5          Year 10
         -----------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $92          $287                $498            $1,108
         -----------------------------------------------------------------------
</TABLE>
                                                                 Prospectus   14

<PAGE>

            PIMCO Low Duration Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Short maturity       B to Aaa; maximum
and           total return,          fixed income         10% below Baa
Strategies    consistent with        securities
              preservation of                             Dividend Frequency
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             1-3 years
              management

              Fund Category
              Short Duration
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a one- to three-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

              . Interest Rate Risk   .Derivatives Risk      .Currency Risk
              . Credit Risk          .Liquidity Risk        .Leveraging Risk
              . Market Risk          .Mortgage Risk         .Management Risk
              . Issuer Risk          .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance
Information The top of the next page shows summary performance information for
            the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

15 PIMCO Funds: Pacific Investment Management Series

<PAGE>


            PIMCO Low Duration Fund (continued)

            Calendar Year Total Returns -- Class D


                    [GRAPH]                                 Highest and Lowest
                                                            Quarter Returns
            '90     '91    '92    '93                       (for periods shown
            ---     ---    ---    ---                       in the bar chart)
           8.70%   13.11%  7.36% 7.43%                      --------------------
                                                            Highest (7/1/91-
      '94    '95     '96    '97    '98    '99               9/30/91)       3.82%
      ---    ---     ---    ---    ---    ---               --------------------
     0.30%  11.57%  5.80%  7.90%  6.81%  2.65%              Lowest (1/1/94-
                                                            3/31/94)      -0.40%

                       Calendar Year End (through 12/31)

           Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                             <C>    <C>     <C>
                                                         1 Year 5 Years 10 Years
            --------------------------------------------------------------------
         Class D                                         2.65%  6.91%   7.10%
            --------------------------------------------------------------------
         Merrill Lynch 1-3 Year Treasury Index(1)        3.06%  6.51%   6.59%
            --------------------------------------------------------------------
         Lipper Short Investment Grade Debt Fund Avg(2)  2.81%  5.95%   6.36%
            --------------------------------------------------------------------
</TABLE>

            (1) The Merrill Lynch 1-3 Year Treasury Index is an unmanaged
                index of U.S Treasury obligations having maturities from one
                to 2.99 years. It is not possible to invest directly in the
                index.
            (2) The Lipper Short Investment Grade Debt Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of less than
                three years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
            -----------------------------------------------------------------------
         Class D    0.25%        0.25%               0.25%           0.75%
            -----------------------------------------------------------------------
            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.50% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.

            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3              Year 5          Year 10
            -----------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $77          $240                $417            $930
            -----------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 16
<PAGE>

            PIMCO Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks high            Intermediate to     Ba to Aaa; maximum 10%
and           current income        long-term           below Baa
Strategies    exempt from           maturity
              federal income        municipal           Dividend Frequency
              tax, consistent       securities          Declared daily and
              with                  (exempt from        distributed monthly
              preservation of       federal income
              capital. Capital      tax)
              appreciation is
              a secondary           Average Portfolio
              objective.            Duration
                                    3-10 years
              Fund Category
              Tax Exempt Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in debt
            securities whose interest is, in the opinion of bond counsel for
            the issuer at the time of issuance, exempt from federal income tax
            ("Municipal Bonds"). Municipal Bonds generally are issued by or on
            behalf of states and local governments and their agencies,
            authorities and other instrumentalities.

             The Fund may invest up to 20% of its net assets in U.S.
            Government Securities, money market instruments and/or "private
            activity" bonds. For shareholders subject to the federal
            alternative minimum tax ("AMT"), distributions derived from
            "private activity" bonds must be included in their AMT
            calculations, and as such a portion of the Fund's distribution may
            be subject to federal income tax. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            net assets in Municipal Bonds or "private activity" bonds which
            are high yield securities ("junk bonds") but rated at least Ba by
            Moody's or BB by S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund may invest more than 25% of its
            assets in bonds of issuers in California and New York. To the
            extent that the Fund concentrates its investments in California or
            New York, it will be subject to California or New York State
            Specific Risk. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. The average portfolio
            duration of this Fund normally varies within a three- to ten-year
            time frame based on PIMCO's forecast for interest rates.

             The Fund may invest in derivative instruments, such as options,
            futures contracts, or swap agreements, on U.S. Government
            Securities and Municipal Bonds, and invest in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

             .Interest Rate Risk    .Liquidity Risk       . California State
             .Credit Risk           .Derivatives Risk       Specific Risk
             .Market Risk           .Leveraging Risk      . New York State
             .Issuer Risk           .Management Risk        Specific Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

17 PIMCO Funds: Pacific Investment Management Series

<PAGE>


            PIMCO Municipal Bond Fund (continued)

            Calendar Year Total Returns -- Class D


                         [GRAPH]                            Highest and Lowest
                                                            Quarter Returns
                       '98       '99                        (for periods shown
                       ---       ---                        in the bar chart)
                      5.68%    -4.06%                       --------------------
                                                            Highest (7/1/98-
                                                            9/30/98)       3.24%
                                                            --------------------
                                                            Lowest (4/1/99-
                                                            6/30/99)      -2.44%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                         <C>            <C>
                                                                    Fund Inception
                                                     1 Year         (12/31/97)
         -------------------------------------------------------------------------
         Class D                                     -4.06%         0.69%
         -------------------------------------------------------------------------
         Lehman General Municipal Bond Index(1)      -2.07%         2.12%
         -------------------------------------------------------------------------
         Lipper General Municipal Fund Avg(2)        -4.63%         0.23%
         -------------------------------------------------------------------------
</TABLE>

            (1) The Lehman General Municipal Bond Index is an unmanaged index
                of municipal bonds with an average duration of 7.68 years as
                of 12/31/99. It is not possible to invest directly in the
                index.
            (2) The Lipper General Municipal Debt Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in municipal debt issues in the top four credit
                ratings. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         Class D    0.25%        0.25%               0.35%           0.85%
         --------------------------------------------------------------------------

            (1)  The Fund's administration agreement includes a plan for Class
                 D shares that has been adopted in conformity with the
                 requirements set forth in Rule 12b-1 under the Investment
                 Company Act of 1940. Up to 0.25% per year of the total fees
                 paid under the administration agreement may be distribution
                 and/or service (12b-1) fees. The Fund will pay a total of
                 0.60% per year under the administration agreement regardless
                 of whether a portion or none of the 0.25% authorized under
                 the plan is paid under the plan. Please see "Management of
                 the Funds--Investment Adviser and Administrator--
                 Administrative Fees" for details. The Fund intends to treat
                 any fees paid under the plan as "service fees" for purposes
                 of applicable rules of the National Association of Securities
                 Dealers, Inc. (the "NASD"). To the extent that such fees are
                 deemed not to be "service fees," Class D shareholders may,
                 depending on the length of time the shares are held, pay more
                 than the economic equivalent of the maximum front-end sales
                 charges permitted by relevant rules of the NASD.
            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3              Year 5          Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $87          $271                $471            $1,049
         --------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 18
<PAGE>

            PIMCO New York Intermediate Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective    Fund Focus          Credit Quality
Investments   Seeks high current      Intermediate        B to Aaa; maximum
and           income exempt from      maturity            10% below Baa
Strategies    federal and New York    municipal
              income tax. Capital     securities          Dividend Frequency
              appreciation is a       (exempt from        Declared daily and
              secondary objective.    federal and New     distributed monthly
                                      York income tax)
              Fund Category
              Tax Exempt Bond         Average Portfolio
                                      Duration
                                      3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund will invest under normal circumstances at least 65%
            of its assets in debt securities whose interest is, in the opinion
            of bond counsel for the issuer at the time of issuance, exempt
            from regular federal income tax and New York income tax ("New York
            Municipal Bonds"). New York Municipal Bonds generally are issued
            by or on behalf of the State of New York and its political
            subdivisions, financing authorities and their agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three-to seven-year time frame, based on PIMCO's forecast for
            interest rates. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. Capital appreciation, if
            any, generally arises from decreases in interest rates or
            improving credit fundamentals for a particular state, municipality
            or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Issuer Risk           .Mortgage Risk
              .Credit Risk           .Issuer Non-           .Leveraging Risk
              .New York State         Diversification Risk  .Management Risk
               Specific Risk         .Liquidity Risk
              .Market Risk           .Derivatives Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Perfor-     The Fund does not have a full calendar year of performance. Thus,
mance       no bar chart or annual returns table is included for the Fund.
Informa-
tion

19 PIMCO Funds: Pacific Investment Management Series

<PAGE>


            PIMCO New York Intermediate Municipal Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)     None


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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.25%        0.25%               0.35%           0.85%
         --------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.60% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other expenses reflects the portion of Administrative Fee paid
                by the class that is not reflected under Distribution and/or
                Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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.

                    Year 1       Year 3              Year 5          Year 10
         -----------------------------------------------------------------------
         Class D    $87          $271                $471            $1,049
         -----------------------------------------------------------------------

                                                                  Prospectus  20

<PAGE>

            PIMCO Real Return Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Inflation-indexed   fixed income securities
and           real return,                              B to Aaa; maximum 10%
Strategies    consistent with       Average Portfolio   below Baa
              preservation of       Duration
              real capital and      See description     Dividend Frequency
              prudent               below               Declared daily and
              investment                                distributed monthly
              management

              Fund Category
              Inflation-Indexed Bond

            The Fund seeks its investment objective by investing under normal
            circumstances at least 65% of its assets in inflation-indexed
            bonds of varying maturities issued by the U.S. and non-U.S.
            governments, their agencies or instrumentalities, and
            corporations. Inflation-indexed bonds are fixed income securities
            that are structured to provide protection against inflation. The
            value of the bond's principal or the interest income paid on the
            bond is adjusted to track changes in an official inflation
            measure. The U.S. Treasury uses the Consumer Price Index for Urban
            Consumers as the inflation measure. Inflation-indexed bonds issued
            by a foreign government are generally adjusted to reflect a
            comparable inflation index, calculated by that government. "Real
            return" equals total return less the estimated cost of inflation,
            which is typically measured by the change in an official inflation
            measure.
             Because of the unique features of inflation-indexed bonds, PIMCO
            uses a modified form of duration for the Fund ("real duration")
            which measures price changes as a result of changes in "real"
            interest rates. A "real" interest rate is the market interest rate
            minus expected inflation. There is no limit on the real duration
            of the Fund, but it is expected that the average real duration of
            this Fund will normally vary approximately within the range of the
            average real duration of all inflation-indexed bonds issued by the
            U.S. Treasury in the aggregate, which as of March 7, 2000 was 9.0
            years. For point of reference, it is expected that the average
            portfolio duration (as opposed to real duration) of this Fund will
            generally vary with a one- to five-year time frame, although this
            range is subject to change.
             The Fund invests primarily in investment grade securities, but
            may invest up to 10% of its assets in high yield securities ("junk
            bonds") rated B or higher by Moody's or S&P, or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund also may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar denominated securities of foreign issuers. The Fund 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. The Fund is non-diversified, which means that it may
            concentrate its assets in a smaller number of issuers than a
            diversified Fund.
             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

             .Interest Rate Risk  .Derivatives Risk       .Currency Risk
             .Credit Risk         .Liquidity Risk         .Leveraging Risk
             .Market Risk         .Issuer Non-Diversi     .Management Risk
             .Issuer Risk          fication Risk
                                  .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.
             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.
21  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Real Return Bond Fund (continued)

            Calendar Year Total Returns -- Class D

                        [GRAPH]                             Highest and Lowest
                                                            Quarter Returns
                      '98     '99                           (for periods shown
                      ---     ---                           in the bar chart)
                     4.00%    5.30%                         --------------------
                                                            Highest (7/1/98-
                                                            9/30/98)       3.09
                                                            --------------------
                                                            Lowest (10/1/98-
                                                            12/31/98)    -0.15%

              Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>

                                                                 Fund Inception
                                                      1 Year     (1/29/97)(3)
         ----------------------------------------------------------------------
         <S>                                          <C>        <C>
         Class D                                      5.30%      4.72%
         ----------------------------------------------------------------------
         Lehman Brothers Inflation Linked Treasury
          Index(1)                                    2.36%      2.99%
         ----------------------------------------------------------------------
         Lipper Short U.S. Government Fund Avg(2)     2.50%      4.57%
         ----------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Inflation Linked Treasury Index is an
                unmanaged index consisting of the U.S. Treasury Inflation
                Protected Securities market with an average duration of 3.2
                years as of 12/31/99. It is not possible to invest directly in
                the index.
            (2) The Lipper Short U.S. Government Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest at least 65% of their assets in
                securities issued or guaranteed by the U.S. government, its
                agencies, or its instrumentalities, with dollar-weighted
                average maturities of less than three years. It does not take
                into account sales charges.
            (3) The Fund began operations on 1/29/97. Index comparisons began
                on 1/31/97.
- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund
            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.25%        0.25%               0.42%           0.92%
         --------------------------------------------------------------------------
</TABLE>

            (1)  The Fund's administration agreement includes a plan for Class
                 D shares that has been adopted in conformity with the
                 requirements set forth in Rule 12b-1 under the Investment
                 Company Act of 1940. Up to 0.25% per year of the total fees
                 paid under the administration agreement may be distribution
                 and/or service (12b-1) fees. The Fund will pay a total of
                 0.65% per year under the administration agreement regardless
                 of whether a portion or none of the 0.25% authorized under
                 the plan is paid under the plan. Please see "Management of
                 the Funds--Investment Adviser and Administrator--
                 Administrative Fees" for details. The Fund intends to treat
                 any fees paid under the plan as "service fees" for purposes
                 of applicable rules of the National Association of Securities
                 Dealers, Inc. (the "NASD"). To the extent that such fees are
                 deemed not to be "service fees," Class D shareholders may,
                 depending on the length of time the shares are held, pay more
                 than the economic equivalent of the maximum front-end sales
                 charges permitted by relevant rules of the NASD.

            (2)  Other Expenses reflects the portion of the Administrative Fee
                 paid by the class that is not reflected under Distribution
                 and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

                   Year 1       Year 3              Year 5          Year 10
         -----------------------------------------------------------------------
         Class D    $94          $293                $509            $1,131
         -----------------------------------------------------------------------

                                                                 Prospectus   22
<PAGE>

            PIMCO Short Duration Municipal Income Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Short and            Baa to Aaa
and           current income         intermediate
Strategies    exempt from            maturity             Dividend Frequency
              federal income         municipal            Declared daily and
              tax, consistent        securities           distributed monthly
              with preservation      (exempt from
              of capital.            federal income
                                     tax)
              Fund
              Category               Average Portfolio
              Tax                    Duration
              Exempt                 0-2 years
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in debt
            securities whose interest is, in the opinion of bond counsel for
            the issuer at the time of issuance, exempt from federal income tax
            ("Municipal Bonds"). Municipal Bonds generally are issued by or on
            behalf of states and local governments and their agencies,
            authorities and other instrumentalities.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The Fund may only invest in investment grade debt securities. The
            Fund may invest more than 25% of its assets in bonds of issuers in
            California and New York. To the extent that the Fund concentrates
            its investments in California or New York, it will be subject to
            California or New York State Specific Risk. The average portfolio
            duration of this Fund varies based on PIMCO's forecast for
            interest rates and under normal market conditions is not expected
            to exceed two years. The Fund will seek income that is high
            relative to prevailing rates from Municipal Bonds.

             The Fund may invest in derivative instruments, such as options,
            futures contracts or swap agreements, or in mortgage- or asset-
            backed securities. The Fund may lend its portfolio securities to
            brokers, dealers and other financial institutions to earn income.
            The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls).

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

              .Interest Rate Risk    .Derivatives Risk    .Management Risk
              .Credit Risk           .Mortgage Risk       .California State
              .Market Risk           .Leveraging Risk      Specific Risk
              .Issuer Risk                                .New York State
                                                           Specific Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

23  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Short Duration Municipal Income Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund
            Shareholder fees (fees paid directly from your investment)     None

            Annual Fund Operating Expenses (expenses that are deducted from
            Fund assets):

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.20%        0.25%               0.35%           0.80%
         --------------------------------------------------------------------------
</TABLE>

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.60% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other expenses reflects the portion of Administrative Fee paid
                by the class that is not reflected under Distribution and/or
                Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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>
                  Year 1        Year 3              Year 5          Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $82          $255                $444            $990
         --------------------------------------------------------------------------
</TABLE>
                                                                Prospectus    24
<PAGE>

            PIMCO Short-Term Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Money market         B to Aaa; maximum
and           current income,        instruments and      10% below Baa
Strategies    consistent with        short maturity
              preservation of        fixed income         Dividend Frequency
              capital and daily      securities           Declared daily and
              liquidity                                   distributed monthly
                                     Average Portfolio
              Fund Category          Duration
              Short Duration         0-1 year
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            does not exceed one year. For point of reference, the dollar-
            weighted average portfolio maturity of this Fund is normally not
            expected to exceed three years.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 5% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).

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

              . Interest Rate Risk     . Issuer Risk          . Leveraging Risk
              . Credit Risk            . Derivatives Risk     . Management Risk
              . Market Risk            . Mortgage Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.


25  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Short-Term Fund (continued)

            Calendar Year Total Returns -- Class D

                             [GRAPH]                        Highest and Lowest
                                                            Quarter Returns
                  '90    '91    '92    '93    '94           (for periods shown
                  ---    ---    ---    ---    ---           in the bar chart)
                 8.14%  6.34%  3.32%  4.31%  2.58%          --------------------
                                                            Highest (10/1/95-
                  '95    '96    '97    '98    '99           12/31/95)      2.52%
                  ---    ---    ---    ---    ---           --------------------
                 8.87%  6.68%  6.20%  5.43%  4.92%          Lowest (1/1/94-
                                                            3/31/94)       0.12%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                        <C>      <C>       <C>
                                                    1 Year   5 Years   10 Years
         ----------------------------------------------------------------------
         Class D                                    4.92%    6.41%     5.66%
         ----------------------------------------------------------------------
         Salomon 3-Month Treasury Bill(1)           4.73%    5.20%     5.05%
         ----------------------------------------------------------------------
         Lipper Ultrashort Obligation Fund Avg(2)   4.58%    5.62%     5.59%
         ----------------------------------------------------------------------
</TABLE>

            (1)  The Salomon 3-Month Treasury Bill Index is an unmanaged index
                 representing monthly return equivalents of yield averages of
                 the last 3 month Treasury Bill issues. It is not possible to
                 invest directly in the index.
            (2)  The Lipper Ultrashort Obligation Fund Average is a total
                 return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in investment-grade debt issues or better, and
                 maintain a portfolio dollar-weighted average maturity between
                 91 and 365 days. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         Class D    0.25%        0.25%               0.25%           0.75%
         --------------------------------------------------------------------------

            (1) The Fund's administration agreement includes a plan for Class D
                shares that has been adopted in conformity with the requirements
                set forth in Rule 12b-1 under the Investment Company Act of
                1940. Up to 0.25% per year of the total fees paid under the
                administration agreement may be distribution and/or service (12b-
                1) fees. The Fund will pay a total of 0.50% per year under the
                administration agreement regardless of whether a portion or none
                of the 0.25% authorized under the plan is paid under the plan.
                Please see "Management of the Funds--Investment Adviser and
                Administrator--Administrative Fees" for details. The Fund
                intends to treat any fees paid under the plan as "service fees"
                for purposes of applicable rules of the National Association of
                Securities Dealers, Inc. (the "NASD"). To the extent that such
                fees are deemed not to be "service fees," Class D shareholders
                may, depending on the length of time the shares are held, pay
                more than the economic equivalent of the maximum front-end sales
                charges permitted by relevant rules of the NASD.

            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%

            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3              Year 5          Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $77          $240                $417            $930
         --------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 26

<PAGE>

            PIMCO StocksPLUS Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks total            S&P 500 stock        B to Aaa; maximum
and           return which           index derivatives    10% below Baa
Strategies    exceeds that of        backed by a
              the S&P 500            portfolio of         Dividend Frequency
                                     short-term fixed     Declared and
              Fund Category          income securities    distributed
              Enhanced Index                              quarterly
              Stock                  Average Portfolio
                                     Duration
                                     0-1 year

            The Fund seeks to exceed the total return of the S&P 500 by
            investing under normal circumstances substantially all of its
            assets in S&P 500 derivatives, backed by a portfolio of Fixed
            Income Instruments. The Fund may invest in common stocks, options,
            futures, options on futures and swaps. The Fund uses S&P 500
            derivatives in addition to or in place of S&P 500 stocks to
            attempt to equal or exceed the performance of the S&P 500. The
            value of S&P 500 derivatives closely track changes in the value of
            the index. However, S&P 500 derivatives may be purchased with a
            fraction of the assets that would be needed to purchase the equity
            securities directly, so that the remainder of the assets may be
            invested in Fixed Income Instruments. PIMCO actively manages the
            fixed income assets held by the Fund with a view toward enhancing
            the Fund's total return, subject to an overall portfolio duration
            which is normally not expected to exceed one year.
             The S&P 500 is composed of 500 selected common stocks that
            represent approximately two-thirds of the total market value of
            all U.S. common stocks. The Fund is neither sponsored by nor
            affiliated with S&P. The Fund seeks to remain invested in S&P 500
            derivatives or S&P 500 stocks even when the S&P 500 is declining.
             Though the Fund does not normally invest directly in S&P 500
            securities, when S&P 500 derivatives appear to be overvalued
            relative to the S&P 500, the Fund may invest all of its assets in
            a "basket" of S&P 500 stocks. Individual stocks are selected based
            on an analysis of the historical correlation between the return of
            every S&P 500 stock and the return on the S&P 500 itself. PIMCO
            may employ fundamental analysis of factors such as earnings and
            earnings growth, price to earnings ratio, dividend growth, and
            cash flows to choose among stocks that satisfy the correlation
            tests. Stocks chosen for the Fund are not limited to those with
            any particular weighting in the S&P 500. The Fund also may invest
            in exchange traded funds based on the S&P 500, such as Standard &
            Poor's Depositary Receipts.
             Assets not invested in equity securities or derivatives may be
            invested in Fixed Income Instruments. The Fund may invest up to
            10% of its assets in high yield securities ("junk bonds") rated B
            or higher by Moody's or S&P, or, if unrated, determined by PIMCO
            to be of comparable quality. The Fund may invest up to 20% of its
            assets in securities denominated in foreign currencies and may
            invest beyond this limit in U.S. dollar-denominated securities of
            foreign issuers. The Fund 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. In addition, the Fund may
            lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income.

- --------------------------------------------------------------------------------
Principal   Under certain conditions, generally in a market where the value of
Risks       both S&P 500 derivatives and fixed income securities are
            declining, the Fund may experience greater losses than would be
            the case if it invested directly in a portfolio of S&P 500 stocks.
            Among the principal risks of investing in the Fund, which could
            adversely affect its net asset value, yield and total return, are:
              .Market Risk           .Interest Rate Risk    .Mortgage Risk
              .Issuer Risk           .Liquidity Risk        .Leveraging Risk
              .Derivatives Risk      .Foreign Investment    .Management Risk
              .Credit Risk            Risk
                                     .Currency Risk
            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risk of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.
             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For the period prior to the inception date of Class D
            shares (4/8/98), performance information shown in the bar chart
            and table is based on the performance of the Fund's Institutional
            Class shares, adjusted to reflect the actual 12b-1/service fees
            and other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

27 PIMCO Funds: Pacific Investment Management Series

<PAGE>


            PIMCO StocksPLUS Fund (continued)

            Calendar Year Total Returns -- Class D

             '94     '95      '96           Highest and Lowest Quarter Returns
             ----    ---      ---           (for periods shown in the bar chart)
            2.58%   39.86%   22.61%         ------------------------------------
                                            Highest (10/1/98-12/31/98)21.17%
            '97      '98      '99           ------------------------------------
            ---      ---      ---           Lowest (7/1/98-9/30/98)-9.87%
           32.34%   27.71%   19.56%

                 Calendar Year End (through 12/31)

Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
<CAPTION>
                                                                 Fund Inception
                                              1 Year   5 Years   (5/13/93)(3)
         ----------------------------------------------------------------------
         <S>                                  <C>      <C>       <C>
         Class D                              19.56%   28.22%    22.57%
         ----------------------------------------------------------------------
         S&P 500 Index(1)                     21.04%   28.56%    22.38%
         ----------------------------------------------------------------------
         Lipper Growth & Income Fund Avg(2)   13.71%   21.35%    16.88%
         ----------------------------------------------------------------------
</TABLE>

            (1) The Standard & Poor's 500 Composite Stock Price Index is an
                unmanaged index of common stocks. It is not possible to invest
                directly in the index.
            (2) The Lipper Growth & Income Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that combine a growth-of-earnings orientation
                and an income requirement for level and/or rising dividends.
                It does not take into account sales charges.
            (3) The Fund began operations on 5/13/93. Index comparisons began
                on 4/30/93.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund
            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
<CAPTION>

                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    0.40%        0.25%               0.40%           1.05%
         --------------------------------------------------------------------------
</TABLE>

            (1)  The Fund's administration agreement includes a plan for Class
                 D shares that has been adopted in conformity with the
                 requirements set forth in Rule 12b-1 under the Investment
                 Company Act of 1940. Up to 0.25% per year of the total fees
                 paid under the administration agreement may be distribution
                 and/or service (12b-1) fees. The Fund will pay a total of
                 0.65% per year under the administration agreement regardless
                 of whether a portion or none of the 0.25% authorized under
                 the plan is paid under the plan. Please see "Management of
                 the Funds--Investment Adviser and Administrator--
                 Administrative Fees" for details. The Fund intends to treat
                 any fees paid under the plan as "service fees" for purposes
                 of applicable rules of the National Association of Securities
                 Dealers, Inc. (the "NASD"). To the extent that such fees are
                 deemed not to be "service fees," Class D shareholders may,
                 depending on the length of time the shares are held, pay more
                 than the economic equivalent of the maximum front-end sales
                 charges permitted by relevant rules of the NASD.
            (2)  Other Expenses reflects the portion of the Administrative Fee
                 paid by the class that is not reflected under Distribution
                 and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

                   Year 1       Year 3              Year 5           Year 10
         -----------------------------------------------------------------------
         Class D    $107         $334                $579            $1,283
         -----------------------------------------------------------------------

                                                                 Prospectus   28
<PAGE>

            PIMCO Strategic Balanced Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum total    Intermediate         B to Aaa; maximum
and           return, consistent     maturity fixed       10% below Baa
Strategies    with preservation of   income securities
              capital and prudent    and S&P 500 stock    Dividend Frequency
              investment             index derivatives    Declared and
              management                                  distributed
                                     Average Portfolio    quarterly
              Fund Category          Duration
              Stock and Bond         0-6 years

            The Fund seeks to achieve its investment objective by normally
            investing in a combination of fixed income securities and equity
            securities or derivatives on equity securities. The percentage of
            the Fund's assets invested in equities and equity derivatives or
            in fixed income securities will be determined based on
            methodology, developed by PIMCO, that forecasts stages in the
            business cycle and considers the risk and reward potential of
            equity and fixed income securities within specific phases of the
            business cycle. The Fund's equity exposure will vary between 45%
            and 75% of assets, and its fixed income exposure will range from a
            minimum of 25% to a maximum of 55%.
             The Fund's equity exposure normally consists of S&P 500
            derivatives, backed by a portfolio of short-term Fixed Income
            Instruments. PIMCO uses S&P 500 derivatives in addition to or in
            place of S&P 500 stocks to attempt to equal or exceed the
            performance of the S&P 500. The value of S&P 500 derivatives
            closely track changes in the value of the index. However, S&P 500
            derivatives may be purchased with a fraction of the assets that
            would be needed to purchase the equity securities directly, so
            that the remainder of the assets may be invested in Fixed Income
            Instruments. PIMCO will actively manage the fixed income assets
            serving as cover for derivatives, as well as any other fixed
            income assets held by the Fund, with a view toward enhancing the
            Fund's total return investment performance. Though the Fund does
            not normally invest directly in S&P 500 securities, when S&P 500
            derivatives appear to be overvalued relative to the S&P 500, the
            Fund may invest the equity portion of its assets in a "basket" of
            S&P 500 stocks.
             The Fund's fixed income exposure will normally consist of a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of the fixed income
            portion of this Fund's assets will normally vary within a three-to
            six-year time frame based on PIMCO's forecast for interest rates.
            The Fixed Income Instruments in which the Fund invests are
            primarily investment grade, but the Fund may invest up to 10% of
            its assets in high yield securities ("junk bonds") rated B or
            higher by Moody's or S&P, or, if unrated, determined by PIMCO to
            be of comparable quality. The Fund may invest up to 20% of its
            assets in securities denominated in foreign currencies, and may
            invest beyond this limit in U.S. dollar denominated securities of
            foreign issuers. The Fund 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.
             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income. The Fund may seek to obtain
            market exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of net income
            earned on the Fund's investments, plus capital appreciation
            arising from increases in the market value of the Fund's holdings.

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

              .Market Risk           .Derivatives Risk      .Mortgage Risk
              .Issuer Risk           .Liquidity Risk        .Leveraging Risk
              .Interest Rate Risk    .Foreign Investment    .Management Risk
              .Credit Risk            Risk
                                     .Currency Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of broad-based securities market indices and an
            index of similar funds.
             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

29  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Strategic Balanced Fund (continued)

            Calendar Year Total Returns -- Class D

                         [GRAPH]                            Highest and Lowest
                                                            Quarter Returns
                 '97      '98     '99                       (for periods shown
                 ---      ---     ---                       in the bar chart)
               23.69    19.13%   11.07%                     --------------------
                                                            Highest (4/1/97-
                                                            6/30/97)      12.12%
                                                            --------------------
                                                            Lowest (7/1/98-
                                                            9/30/98)      -4.62%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                               <C>    <C>
                                                                  Fund Inception
                                                           1 Year (6/28/96)(4)
         -----------------------------------------------------------------------
         Class D                                           11.07% 18.24%
         -----------------------------------------------------------------------
         S&P 500 Index(1)                                  21.04% 27.14%
         -----------------------------------------------------------------------
         S&P 500 and Lehman Aggregate Bond Index Blend(2)  12.00% 18.76%
         -----------------------------------------------------------------------
         Lipper Balanced Fund Avg(3)                        8.73% 14.35%
         -----------------------------------------------------------------------
</TABLE>

            (1) The Standard & Poor's 500 Composite Stock Price Index is an
                unmanaged index of common stocks. It is not possible to invest
                directly in the index.
            (2) This index is a static blend consisting 60% of the S&P 500
                Composite Stock Price Index and 40% of the Lehman Brothers
                Aggregate Bond Index. This blended index reflects the Fund's
                investment strategy more accurately than the S&P 500 Index. It
                is not possible to invest directly in the index.
            (3) The Lipper Balanced Fund Average is a total return performance
                average of Funds tracked by Lipper Analytical Services, Inc.,
                whose primary objective is to conserve principal by
                maintaining at all times a balanced portfolio of both stocks
                and bonds. It does not take into account sales charges.
            (4) The Fund began operations on 6/28/96. Index comparisons began
                on 6/30/96.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         Class D    0.40%        0.25%               0.40%           1.05%
         --------------------------------------------------------------------------

            (1)  The Fund's administration agreement includes a plan for Class
                 D shares that has been adopted in conformity with the
                 requirements set forth in Rule 12b-1 under the Investment
                 Company Act of 1940. Up to 0.25% per year of the total fees
                 paid under the administration agreement may be distribution
                 and/or service (12b-1) fees. The Fund will pay a total of
                 0.65% per year under the administration agreement regardless
                 of whether a portion or none of the 0.25% authorized under
                 the plan is paid under the plan. Please see "Management of
                 the Funds--Investment Adviser and Administrator--
                 Administrative Fees" for details. The Fund intends to treat
                 any fees paid under the plan as "service fees" for purposes
                 of applicable rules of the National Association of Securities
                 Dealers, Inc. (the "NASD"). To the extent that such fees are
                 deemed not to be "service fees," Class D shareholders may,
                 depending on the length of time the shares are held, pay more
                 than the economic equivalent of the maximum front-end sales
                 charges permitted by relevant rules of the NASD.

            (2)  Other Expenses reflects the portion of the Administrative Fee
                 paid by the class that is not reflected under Distribution
                 and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3              Year 5          Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $107         $334                $579            $1,283
         --------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 30

<PAGE>

            PIMCO Total Return Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         fixed income
and           total return,          maturity securities  B to Aaa; maximum
Strategies    consistent with                             10% below Baa
              preservation of        Average Portfolio
              capital and            Duration             Dividend Frequency
              prudent                3-6 years            Declared daily and
              investment                                  distributed monthly
              management

              Fund Category
              Intermediate Duration
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P or, if unrated,
            determined by PIMCO to be of comparable quality. The Fund may
            invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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     Among the principal risks of investing in the Fund, which could
Risks         adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Derivatives Risk      .Currency Risk
              .Credit Risk           .Liquidity Risk        .Leveraging Risk
              .Market Risk           .Mortgage Risk         .Management Risk
              .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.

31 PIMCO Funds: Pacific Investment Management Series

<PAGE>


            PIMCO Total Return Fund (continued)

            Calendar Year Total Returns -- Class D

           [GRAPH]                                          Highest and Lowest
                                                            Quarter Returns
  '90     '91    '92     '93    '94                         (for periods shown
  ---     ---    ---     ---    ---                         in the bar chart)
 7.70%  19.19%  9.42%  12.20% -3.88%                        --------------------
  '95    '96     '97    '98    '99                          Highest (7/1/91-
  ---    ---     ---    ---    ---                          9/30/91)       6.58%
19.41%  4.37%   9.84%  9.43%  -.60%                         --------------------
                                                            Lowest (1/1/94-
                                                            3/31/94)      -2.76%
                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                             <C>    <C>     <C>
                                                         1 Year 5 Years 10 Years
         -----------------------------------------------------------------------
         Class D                                         -0.60% 8.29%   8.47%
         -----------------------------------------------------------------------
         Lehman Aggregate Bond Index(1)                  -0.82% 7.73%   7.70%
         -----------------------------------------------------------------------
         Lipper Intermediate Investment Grade Debt Fund
          Avg(2)                                         -1.31% 6.79%   7.09%
         -----------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Aggregate Bond Index is an unmanaged index
                of investment grade, U.S. dollar-denominated fixed income
                securities of domestic issuers having a maturity greater than
                one year. It is not possible to invest directly in the index.
            (2) The Lipper Intermediate Investment Grade Debt Fund Average is
                a total return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in investment-grade debt issues (rated in the top four
                grades) with dollar-weighted average maturities of five to ten
                years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         Class D    0.25%        0.25%               0.25%           0.75%
         --------------------------------------------------------------------------

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.50% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3             Year 5           Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $77          $240                $417            $930
         --------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 32
<PAGE>

            PIMCO Total Return Mortgage Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks maximum          Intermediate         Baa to Aaa; maximum
and           total return,          maturity fixed       10% below Aaa
Strategies    consistent with        income securities    Dividend Frequency
              preservation of
              capital and            Average Portfolio    Declared daily and
              prudent                Duration             distributed monthly
              investment             2-6 years
              management

              Fund Category
              Intermediate
              Duration Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its assets in a
            diversified portfolio of mortgage-related Fixed Income Instruments
            of varying maturities (such as mortgage pass-through securities,
            collateralized mortgage obligations, commercial mortgage-backed
            securities and mortgage dollar rolls). The average portfolio
            duration of this Fund normally varies within a two- to six-year
            time frame based on PIMCO's forecast for interest rates. The Fund
            invests primarily in securities that are in the highest rating
            category, but may invest up to 10% of its assets in investment
            grade securities rated below Aaa by Moody's or AAA by S&P, subject
            to a minimum rating of Baa by Moody's or BBB by S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may not invest in securities denominated in foreign currencies,
            but may invest without limit in U.S. dollar-denominated securities
            of foreign issuers.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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 Fund, which could
            adversely affect its net asset value, yield and total return, are:

              .Interest Rate Risk    .Mortgage Risk         .Foreign Investment
              .Credit Risk           .Derivatives Risk        Risk
              .Market Risk           .Liquidity Risk        .Leveraging Risk
              .Issuer Risk                                  .Management Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds.

             The bar chart, the information to its right and the Average
            Annual Total Returns table show performance of the Fund's Class D
            Shares. For periods prior to the inception date of Class D shares
            (4/8/98), performance information shown in the bar chart and table
            is based on the performance of the Fund's Institutional Class
            shares, adjusted to reflect the actual 12b-1/service fees and
            other expenses paid by Class D shares. Past performance is no
            guarantee of future results.


33  PIMCO Funds: Pacific Investment Management Series
<PAGE>


            PIMCO Total Return Mortgage Fund (continued)

            Calendar Year Total Returns -- Class D

                       [GRAPH]                              Highest and Lowest
                                                            Quarter Returns
                      98     99                             (for periods shown
                      --     --                             in the bar chart)
                     6.81%  2.01%                           --------------------
                                                            Highest (7/1/98-
                                                            9/30/98)       3.08%
                                                            --------------------
                                                            Lowest (4/1/99-
                                                            6/30/99)      -0.23%

                 Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)

<TABLE>
         <S>                                      <C>                  <C>
                                                                       Fund Inception
                                                  1 Year               (7/31/97)
         ----------------------------------------------------------------------------
         Class D                                  2.01%                5.62%
         ----------------------------------------------------------------------------
         Lehman Mortgage Index(1)                 1.86%                5.06%
         ----------------------------------------------------------------------------
         Lipper U.S. Mortgage Fund Avg(2)         0.65%                4.12%
         ----------------------------------------------------------------------------
</TABLE>

            (1) The Lehman Brothers Mortgage Index is an unmanaged index of
                mortgage-related fixed income securities with an average
                duration of 4.27 years as of 12/31/99. It is not possible to
                invest directly in the index.
            (2) The Lipper U.S. Mortgage Fund Average is a total return
                performance average of Funds tracked by Lipper Analytical
                Services, Inc. that invest at least 65% of their assets in
                mortgages/securities issued or guaranteed as to principal and
                interest by the U.S. government and certain federal agencies.
                It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class D shares of the Fund:
of the
Fund

            Shareholder Fees (fees paid directly from your investment)     None

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

<TABLE>
         <S>        <C>          <C>                 <C>             <C>
                                 Distribution                        Total Annual
                    Advisory     and/or Service      Other           Fund Operating
                    Fees         (12b-1) Fees(1)     Expenses(2)     Expenses
         --------------------------------------------------------------------------
         Class D    0.25%        0.25%               0.40%           0.90%
         --------------------------------------------------------------------------

            (1) The Fund's administration agreement includes a plan for Class
                D shares that has been adopted in conformity with the
                requirements set forth in Rule 12b-1 under the Investment
                Company Act of 1940. Up to 0.25% per year of the total fees
                paid under the administration agreement may be distribution
                and/or service (12b-1) fees. The Fund will pay a total of
                0.65% per year under the administration agreement regardless
                of whether a portion or none of the 0.25% authorized under the
                plan is paid under the plan. Please see "Management of the
                Funds--Investment Adviser and Administrator--Administrative
                Fees" for details. The Fund intends to treat any fees paid
                under the plan as "service fees" for purposes of applicable
                rules of the National Association of Securities Dealers, Inc.
                (the "NASD"). To the extent that such fees are deemed not to
                be "service fees," Class D shareholders may, depending on the
                length of time the shares are held, pay more than the economic
                equivalent of the maximum front-end sales charges permitted by
                relevant rules of the NASD.
            (2) Other Expenses reflects the portion of the Administrative Fee
                paid by the class that is not reflected under Distribution
                and/or Service (12b-1) Fees.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class D shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, and then redeem all your shares at the end of those
            periods. The Examples also assume that your investment has a 5%
            return each year, the reinvestment of all dividends and
            distributions, and that the Fund'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.

<CAPTION>
                    Year 1       Year 3              Year 5          Year 10
         --------------------------------------------------------------------------
         <S>        <C>          <C>                 <C>             <C>
         Class D    $92          $287                $498            $1,108
         --------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus 34
<PAGE>

            Summary of Principal Risks

            The value of your investment in a Fund changes with the values of
            that Fund's investments. Many factors can affect those values. The
            factors that are most likely to have a material effect on a
            particular Fund's portfolio as a whole are called "principal
            risks." The principal risks of each Fund are identified in the
            Fund Summaries and are described in this section. Each Fund may be
            subject to additional principal risks and risks other than those
            described below because the types of investments made by a Fund
            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 Funds, their
            investments and the related risks. There is no guarantee that a
            Fund will be able to achieve its investment objective.

Interest    As interest rates rise, the value of fixed income securities held
Rate Risk   by a Fund 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.

Credit      A Fund could lose money if the issuer or guarantor of a fixed
Risk        income security, or the counterparty to a derivatives contract,
            repurchase agreement or a 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        Funds that invest in high yield securities and unrated securities
Yield       of similar credit quality (commonly known as "junk bonds") may be
Risk        subject to greater levels of interest rate, credit and liquidity
            risk than Funds that do not invest in such securities. High yield
            securities are considered predominately 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 a Fund's ability to sell its high yield securities
            (liquidity risk).

Market      The market price of securities owned by a Fund may go up or down,
Risk        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. Equity securities
            generally have greater price volatility than fixed income
            securities.

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

Liquidity   Liquidity risk exists when particular investments are difficult to
Risk        purchase or sell. A Fund's investments in illiquid securities may
            reduce the returns of the Fund because it may be unable to sell
            the illiquid securities at an advantageous time or price. Funds
            with principal investment strategies that involve foreign
            securities, derivatives or securities with substantial market
            and/or credit risk tend to have the greatest exposure to liquidity
            risk.

Derivatives Derivatives are financial contracts whose value depends on, or is
Risk        derived from, the value of an underlying asset, reference rate or
            index. The various derivative instruments that the Funds 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 and
            Policies" in the Statement of Additional Information. The Funds
            typically use derivatives as a substitute for taking a position in
            the underlying asset and/or as part of a strategy designed to
            reduce exposure to other risks, such as interest rate or currency
            risk. The Funds may also use derivatives for leverage, in which
            case their use would involve leveraging risk. A Fund's use of
            derivative instruments involves risks different from, or possibly
            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

35 PIMCO Funds: Pacific Investment Management Series

<PAGE>

            may not correlate perfectly with the underlying asset, rate or
            index. A Fund 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 Fund will engage in these transactions
            to reduce exposure to other risks when that would be beneficial.

Mortgage    A Fund that purchases mortgage-related securities is subject to
Risk        certain additional risks. Rising interest rates tend to extend the
            duration of mortgage-related securities, making them more
            sensitive to changes in interest rates. As a result, in a period
            of rising interest rates, a Fund that holds mortgage-related
            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 a Fund because the Fund will have to reinvest that
            money at the lower prevailing interest rates.

Foreign     A Fund that invests in foreign securities may experience more
(Non-       rapid and extreme changes in value than a Fund that invests
U.S.)       exclusively in securities of U.S. companies. The securities
Investment  markets of many foreign countries are relatively small, with a
Risk        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 a Fund's investments in a
            foreign country. In the event of nationalization, expropriation or
            other confiscation, a Fund 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 a Fund invests a
            significant portion of its assets in a concentrated geographic
            area like Eastern Europe or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments.

Emerging    Foreign investment risk may be particularly high to the extent
Markets     that a Fund invests in emerging market securities of issuers based
Risk        in countries with developing economies. 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    Funds that invest directly in foreign currencies or in securities
Risk        that trade in, and receive revenues in, foreign (non-U.S.)
            currencies are 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, or by the imposition of currency
            controls or other political developments in the U.S. or abroad. As
            a result, the Fund's investments in foreign currency-denominated
            securities may reduce the returns of the Fund.

Issuer      Focusing investments in a small number of issuers, industries or
Non-        foreign currencies increases risk. Funds that are "non-
Diversifi-  diversified" may invest a greater percentage of their assets in
cation      the securities of a single issuer (such as bonds issued by a
Risk        particular state) than Funds that are "diversified." Funds 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. Similarly, a Fund may be more sensitive to adverse
            economic, business or political developments if it invests a
            substantial portion of its assets in the bonds of similar projects
            or from issuers in the same state.

Leveraging  Certain transactions may give rise to a form of leverage. Such
Risk        transactions may include, among others, reverse repurchase
            agreements, loans of portfolios securities, and the use 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 Fund 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, may
            cause a Fund to be more volatile than if the Fund had not been
            leveraged. This is because leverage tends to exaggerate the effect
            of any increase or decrease in the value of a Fund's portfolio
            securities.

                                                                   Prospectus 36
<PAGE>

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

California  A Fund that concentrates its investments in California municipal
State-      bonds may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of California issuers
Risk        to pay interest or repay principal. Provisions of the California
            Constitution and State statutes which limit the taxing and
            spending authority of California governmental entities may impair
            the ability of California issuers to pay principal and/or interest
            on their obligations. While California's economy is broad, its
            does have major concentrations in high technology, aerospace and
            defense-related manufacturing, trade, entertainment, real estate
            and financial services, and may be sensitive to economic problems
            affecting those industries. Future California political and
            economic developments, constitutional amendments, legislative
            measures, executive orders, administrative regulations, litigation
            and voter initiatives could have an adverse effect on the debt
            obligations of California issuers.

New York    A Fund that concentrates its investments in New York municipal
State-      bonds may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of New York issuers
Risk        to pay interest or repay principal. Certain issuers of New York
            municipal bonds have experienced serious financial difficulties in
            recent years. A reoccurrence of these difficulties may impair the
            ability of certain New York issuers to pay principal or interest
            on their obligations. The financial health of New York City
            affects that of the State, and when New York City experiences
            financial difficulty it may have an adverse affect on New York
            municipal bonds held by the Fund. The growth rate of New York has
            recently been somewhat slower than the nation overall. The
            economic and financial condition of New York also may be affected
            by various financial, social, economic and political factors.

            Management of the Funds

Investment  PIMCO serves as the investment adviser and the administrator
Adviser     (serving in its capacity as administrator, the "Administrator")
and         for the Funds. Subject to the supervision of the Board of
Administra- Trustees, PIMCO is responsible for managing the investment
tor         activities of the Funds and the Funds' business affairs and other
            administrative matters.

             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.

Advisory    Each Fund pays PIMCO fees in return for providing investment
Fees        advisory services. For the fiscal year ended March 31, 1999, the
            Funds paid monthly advisory fees to PIMCO at the following annual
            rates (stated as a percentage of the average daily net assets of
            each Fund taken separately):


<TABLE>
<CAPTION>
         Fund                    Advisory Fees
         ---------------------------------------------
         <S>                     <C>
         Strategic Balanced and
          StocksPLUS Funds           0.40%
         Emerging Markets Bond
          Fund                       0.45%
         All other Funds             0.25%
</TABLE>

             The Short Duration Municipal Income, California Intermediate
            Municipal Bond, New York Intermediate Municipal Bond and
            Convertible Bond Funds were not operational during the fiscal year
            ended March 31, 1999. The investment advisory fees for the Short
            Duration Municipal Income, California Intermediate Municipal Bond,
            New York Intermediate Municipal Bond, and Convertible Funds are at
            an annual rate of 0.20%, 0.25%, 0.25% and 0.40%, respectively,
            based upon the average daily net assets of the Fund.

Administra- Each Fund pays for the administrative services it requires under a
tive Fees   fee structure which is essentially fixed. Class D shareholders of
            each Fund pay an administrative fee to PIMCO, computed as a
            percentage of the Fund's assets attributable in the aggregate to
            that class of shares. PIMCO, in turn, provides or procures
            administrative services for Class D shareholders and also bears
            the costs of various third-party services required by the Funds,
            including audit, custodial, portfolio accounting, legal transfer
            agency and printing costs. The result of this fee structure is an
            expense level for Class D shareholders of each Fund that, with
            limited exceptions, is precise and predictable under ordinary
            circumstances.

37 PIMCO Funds: Pacific Investment Management Series

<PAGE>

             PIMCO may pay financial service firms a portion of the Class D
            administrative fees in return for the firm's services (normally
            not to exceed an annual rate of 0.35% of a Fund's average daily
            net assets attributable to Class D shares purchased through such
            firms).

             For the fiscal year ended March 31, 1999, the Funds paid PIMCO
            monthly administrative fees at the following annual rates (stated
            as a percentage of the average daily net assets attributable in
            the aggregate to the Fund's Class D shares):


<TABLE>
<CAPTION>
         Fund                                     Administrative Fees*
         ---------------------------------------------------------------------
         <S>                                      <C>
         Short-Term, Low Duration and Total
          Return Funds                                   0.25%
         Municipal Bond Fund                             0.35%
         Total Return Mortgage, High Yield, Real
          Return Bond, Strategic Balanced and
          StocksPLUS Funds                               0.40%
         Foreign Bond                                    0.45%
         Emerging Markets Bond Fund                      0.55%
</TABLE>

            * As described below under "12b-1 Plan for Class D Shares," the
            administration agreement includes a plan adopted in conformity
            with Rule 12b-1 under the Investment Company Act of 1940 (the
            "1940 Act") which provides for the payment of up to 0.25% of the
            Administrative Fee as reimbursement for expenses in respect of
            activities that may be deemed to be primarily intended to result
            in the sale of Class D shares. In the Fund Summaries above, the
            "Annual Fund Operating Expenses" table provided under "Fees and
            Expenses of the Fund" for each Fund shows the Administrative Fees
            rate under two separate columns entitled "Distribution and/or
            Service (12b-1) Fees" and "Other Expenses."

             The Short Duration Municipal Income, California Intermediate
            Municipal Bond, New York Intermediate Municipal Bond, Convertible
            Bond Funds were not operational during the fiscal year ended March
            31, 1999. The administrative fees for the Short Duration Municipal
            Income, California Intermediate Municipal Bond, New York
            Intermediate Municipal Bond, and Convertible Bond Funds are at an
            annual rate of 0.19%, 0.24%, 0.24% and 0.25%, respectively, based
            upon the average daily net assets of the Fund.

12b-1       The Funds' administration agreement includes a plan for Class D
Plan for    shares that has been adopted in conformity with the requirements
Class D     set forth in Rule 12b-1 under the 1940 Act. The plan provides that
Shares      up to 0.25% per annum of the Class D administrative fees paid
            under the administration agreement may represent reimbursement for
            expenses in respect of activities that may be deemed to be
            primarily intended to result in the sale of Class D shares. The
            principal types of activities for which such payments may be made
            are services in connection with the distribution of Class D shares
            and/or the provision of shareholder services. Because 12b-1 fees
            would be paid out of a Fund's Class D share assets on an ongoing
            basis, over time these fees would increase the cost of your
            investment in Class D shares and may cost you more than other
            types of sales charges.
                                                                   Prospectus 38
<PAGE>

Individual  The following individuals have primary responsibility for managing
Portfolio   each of the noted Funds.
Managers


<TABLE>
<CAPTION>
                                                             Recent Professional
         Fund                    Portfolio Manager    Since  Experience
         ----------------------------------------------------------------------------
         <C>                     <C>                  <C>    <S>
         Short-Term              Paul A. McCulley      8/99  Executive Vice
                                                             President, PIMCO. He has
                                                             managed fixed income
                                                             assets since joining
                                                             PIMCO in 1999. Prior to
                                                             joining PIMCO, Mr.
                                                             McCulley was associated
                                                             with Warburg Dillon Read
                                                             as a Managing Director
                                                             from 1992-1999 and Head
                                                             of Economic and Strategy
                                                             Research for the
                                                             Americas from 1995-1999,
                                                             where he managed macro
                                                             research world-wide.

         Low Duration            William H. Gross      5/87* Managing Director, Chief
         Total Return                                  5/87* Investment Officer and a
         Strategic Balanced                            1/98  founding partner of
         StocksPLUS                                    1/98  PIMCO.
                                                             He leads a team which
                                                             manages the Strategic
                                                             Balanced and
                                                             StocksPLUS Funds.

         Total Return Mortgage   W. Scott Simon        4/00  Executive Vice
                                                             President, PIMCO. He
                                                             joined PIMCO as a
                                                             Portfolio Manager in
                                                             2000.
                                                             Prior to that, he was a
                                                             Senior Managing Director
                                                             and co-head of MBS pass-
                                                             through trading at Bear
                                                             Stearns & Co.

         Foreign Bond            Lee R. Thomas, III    7/95  Managing Director and
                                                             Senior International
                                                             Portfolio Manager,
                                                             PIMCO. He joined
                                                             PIMCO as a Portfolio
                                                             Manager in 1995, and has
                                                             managed fixed income
                                                             accounts
                                                             for various
                                                             institutional clients
                                                             and funds since that
                                                             time. Prior to joining
                                                             PIMCO,
                                                             he was associated with
                                                             Investcorp as a member
                                                             of the management
                                                             committee
                                                             responsible for global
                                                             securities and foreign
                                                             exchange trading.

         Emerging Markets Bond   Mohamed A. El-Erian   8/99  Managing Director,
                                                             PIMCO. He joined PIMCO
                                                             as a Portfolio Manager
                                                             in 1999. Prior to
                                                             joining PIMCO, he was a
                                                             Managing Director from
                                                             1998-1999 for Salomon
                                                             Smith Barney/Citibank
                                                             where he was head of
                                                             emerging markets
                                                             research. Prior to that
                                                             he was associated with
                                                             the International
                                                             Monetary Fund as a
                                                             Deputy Director and
                                                             Advisor from 1983-1998.

         High Yield              Benjamin L. Trosky   12/92* Managing Director,
                                                             PIMCO. He joined PIMCO
                                                             as a Portfolio Manager
                                                             in 1990,
                                                             and has managed fixed
                                                             income accounts for
                                                             various institutional
                                                             clients and funds since
                                                             that time.

         Short Duration          Mark V. McCray        4/00  Senior Vice President,
          Municipal Income                                   PIMCO. He joined PIMCO
          Municipal Bond                               4/00  as a Portfolio Manager
         California Intermediate                       4/00  in 2000. Prior to that,
          Municipal Bond                                     he was a bond trader
         New York Intermediate                         4/00  from 1992-1999 at
          Municipal Bond                                     Goldman, Sachs & Co.
                                                             where he was
                                                             appointed Vice President
                                                             in 1996 and named co-
                                                             head of municipal bond
                                                             trading in
                                                             1997 with responsibility
                                                             for the firm's
                                                             proprietary account and
                                                             supervised municipal
                                                             bond traders.

         Real Return Bond        John B. Brynjolfsson  1/97* Executive Vice
                                                             President, PIMCO. He
                                                             joined PIMCO as a
                                                             Portfolio Manager in
                                                             1989,
                                                             and has managed fixed
                                                             income accounts for
                                                             various institutional
                                                             clients and funds since
                                                             that time.

         Convertible             Sandra K. Durn        4/99* Senior Vice President,
                                                             PIMCO. She joined PIMCO
                                                             as a Portfolio Manager
                                                             in 1999. Prior to
                                                             joining PIMCO in 1999,
                                                             she was associated with
                                                             Nicholas-Applegate
                                                             Capital Management,
                                                             where she was a
                                                             Convertible Securities
                                                             Portfolio Manager from
                                                             1995 to 1999, and a
                                                             Quantitative Analyst
                                                             since 1994.
</TABLE>
            -------
            * Since inception of the Fund.

Distributor The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors L.P. The Distributor, located
            at 2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.

39  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            How to Buy and Sell Shares

            The following section provides basic information about how to buy,
            sell (redeem) and exchange Class D shares of the Funds.

General       .  Financial Service Firms. Broker-dealers, registered investment
Information advisers and other financial service firms provide varying
            investment products, programs or accounts, pursuant to arrangements
            with the Distributor, through which their clients may purchase and
            redeem Class D shares of the Funds. Firms will generally provide or
            arrange for the provision of some or all of the shareholder
            servicing and account maintenance services required by your account,
            including, without limitation, transfers of registration and
            dividend payee changes. Firms may also perform other functions,
            including generating confirmation statements and disbursing cash
            dividends, and may arrange with their clients for other investment
            or administrative services. Your firm may independently establish
            and charge you transaction fees and/or other additional amounts for
            such services, which may change over time. These fees and additional
            amounts could reduce your investment returns on Class D shares of
            the Funds.

              Your financial service firm may have omnibus accounts and similar
            arrangements with the Trust and may be paid for providing sub-
            transfer agency and other services. A firm may be paid for its
            services directly or indirectly by the Funds, PIMCO Advisors or an
            affiliate (normally not to exceed an annual rate of 0.35% of a
            Fund's average daily net assets attributable to its Class D shares
            and purchased through such firm for its clients). Your firm may
            establish various minimum investment requirements for Class D shares
            of the Funds and may also establish certain privileges with respect
            to purchases, redemptions and exchanges of Class D shares or the
            reinvestment of dividends. Please contact your firm for information.

              This Prospectus should be read in connection with your firm's
            materials regarding its fees and services.

              .  Calculation of Share Price and Redemption Payments. When you
            buy or sell (redeem) Class D shares of the Funds, you pay or
            receive a price equal to the NAV of the shares. NAVs are
            determined at the close of regular trading (normally 4:00 p.m.
            Eastern time) on each day the New York Stock Exchange is open. See
            "How Fund Shares Are Priced" below for details. Generally,
            purchase and redemption orders for Fund shares are processed at
            the NAV next calculated after your order is received by the
            Distributor. In addition, orders received by the Distributor from
            financial service firms after NAV is determined that day will be
            processed at that day's NAV if the orders were received by the
            firm from its customer prior to such determination and were
            transmitted to and received by the Distributor prior to its close
            of business that day (normally 7:00 p.m., Eastern time).

              The Trust does not calculate NAVs or process orders on days when
            the New York Stock Exchange is closed. If your purchase or
            redemption order is received by the Distributor on a day when the
            New York Stock Exchange is closed, it will be processed on the
            next succeeding day when the New York Stock Exchange is open
            (according to the succeeding day's NAV).

Buying      Class D shares of each Fund are continuously offered through
Shares      financial service firms, such as broker-dealers or registered
            investment advisers, with which the Distributor has an agreement for
            the use of the Funds in particular investment products, programs or
            accounts for which a fee may be charged. See "Financial Service
            Firms" above.

              You may purchase Class D shares only through your financial
            service firm. In connection with purchases, your financial service
            firm is responsible for forwarding all necessary documentation to
            the Distributor, and may charge you for such services. If you wish
            to purchase shares of the Funds directly from the Trust or the
            Distributor, you should inquire about the other classes of shares
            offered by the Trust. Please call the Distributor at 1-888-87-
            PIMCO for information about other investment options.

              Class D shares of the Funds will be held in your account with
            your financial service firm and, generally, your firm will hold
            your Class D shares in nominee or street name as your agent. In
            most cases, the Trust's transfer agent will have no information
            with respect to or control over accounts of specific Class D
            shareholders and you may obtain information about your accounts
            only through your financial service firm. In certain
            circumstances, your firm may arrange to have your shares held in
            your own name or you may subsequently become a holder of record
            for some other reason (for instance, if you terminate your
            relationship with your firm). In such circumstances, please
            contact the Distributor at 1-888-87-PIMCO for information about
            your account. In the interest of economy and convenience,
            certificates for Class D shares will not be issued.

                                                                  Prospectus  40
<PAGE>

              The Distributor, in its sole discretion, may accept or reject any
            order for purchase of Fund shares. The sale of shares will be
            suspended during any period in which the Exchange is closed for
            other than weekends or holidays, or if permitted by the rules of
            the Securities and Exchange Commission, when trading on the New
            York Stock Exchange is restricted or during an emergency which
            makes it impracticable for the Funds to dispose of their
            securities or to determine fairly the value of their net assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors.

              .  Investment Minimums. The following investment minimums apply
            for purchases of Class D shares.

<TABLE>
<CAPTION>
                  Initial Investment               Subsequent Investments
                  -------------------------------------------------------
                  <S>                              <C>
                  $2,500 per Fund                  $100 per Fund
</TABLE>

              Your financial service firm may impose different investment
            minimums than the Trust. For example, if your firm maintains an
            omnibus account with a particular Fund, the firm may impose higher
            or lower investment minimums than the Trust when you invest in
            Class D shares of the Fund through your firm. Please contact your
            firm for information.

Exchanging  You may exchange your Class D shares of any Fund for Class D
Shares      shares of any other Fund or any series of PIMCO Funds: Multi-
            Manager Series that offers Class D shares. Shares are exchanged on
            the basis of their respective NAVs next calculated after your
            exchange order is received by the Distributor. Currently, the
            Trust does not charge any exchange fees or charges. Your financial
            service firm may impose various fees and charges, investment
            minimums and other requirements with respect to exchanges. Please
            contact your financial service firm to exchange your shares and
            for additional information about the exchange privilege.

              The Trust reserves the right to refuse exchange purchases if, in
            the judgment of PIMCO, the purchase would adversely affect a Fund
            and its shareholders. In particular, a pattern of exchanges
            characteristic of "market-timing" strategies may be deemed by
            PIMCO to be detrimental to the Trust or a particular Fund.
            Currently, the Trust limits the number of "round trip" exchanges
            an investor may make. An investor makes a "round trip" exchange
            when the investor purchases shares of a particular Fund,
            subsequently exchanges those shares for shares of a different Fund
            and then exchanges back into the originally purchased Fund. The
            Trust has the right to refuse any exchange for any investor who
            completes (by making the exchange back into the shares of the
            originally purchased Fund) more than six round trip exchanges in
            any twelve-month period. Although the Trust has no current
            intention of terminating or modifying the exchange privilege other
            than as set forth in the preceding sentence, it reserves the right
            to do so at any time. Except as otherwise permitted by Securities
            and Exchange Commission regulations, the Trust will give 60 days'
            advance notice to your financial service firm of any termination
            or material modification of the exchange privilege.

Selling     You can sell (redeem) Class D shares through your financial
Shares      service firm on any day the New York Stock Exchange is open. You
            do not pay any fees or other charges to the Trust or the
            Distributor when you sell your shares, although your financial
            service firm may charge you for its services in processing your
            redemption request. Please contact your firm for details. If you
            are the holder of record of your Class D shares, you may contact
            the Distributor at 1-888-87-PIMCO for information regarding how to
            sell your shares directly to the Trust.

              Your financial service firm is obligated to transmit your
            redemption orders to the Distributor promptly and is responsible
            for ensuring that your redemption request is in proper form. Your
            financial service firm will be responsible for furnishing all
            necessary documentation to the Distributor or the Trust's transfer
            agent and may charge you for its services. Redemption proceeds
            will be forwarded to your financial service firm as promptly as
            possible and in any event within seven days after the redemption
            request is received by the Distributor in good order. Redemptions
            of Fund shares may be suspended when trading on the New York Stock
            Exchange is restricted or during an emergency which makes it
            impracticable for the Funds to dispose of their securities or to
            determine fairly the value of their net assets, or during any
            other period as permitted by the Securities and Exchange
            Commission for the protection of investors. Under these and other
            unusual circumstances, the Trust may suspend redemptions or
            postpone payment for more than seven days, as permitted by law.

Redemptions The Trust had agreed to redeem shares of each Fund solely in cash
In Kind     up to the lesser of $250,000 or 1% of the Fund's net assets during
            any 90-day period for any one shareholder. In consideration of the
            best interests of the remaining shareholders, the Trust may pay
            any redemption proceeds exceeding this amount in whole or in part
            by a distribution in kind of securities held by a Fund in lieu of
            cash. Except for Funds with a tax-efficient management strategy,
            it is highly unlikely that your shares would ever be

41  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            redeemed in kind. If your shares are redeemed in kind, you should
            expect to incur transaction costs upon the disposition of the
            securities received in the distribution.

            How Fund Shares Are Priced

              The net asset value ("NAV") of a Fund's Class D shares is
            determined by dividing the total value of a Fund's portfolio
            investments and other assets attributable to that class, less any
            liabilities, by the total number of shares outstanding of that
            class.

              For purposes of calculating NAV, 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 of 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 currencies other than the U.S.
            dollar are converted to U.S. dollars using exchange rates obtained
            from pricing services. As a result, the NAV of a Fund's shares may
            be affected by changes in the value of currencies in relation to
            the U.S. dollar. The value of securities traded in markets outside
            the United States or denominated in currencies other than the U.S.
            dollar may be affected significantly on a day that the New York
            Stock Exchange is closed and an investor is not able to purchase,
            redeem or exchange shares.

              Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time)(the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Funds normally use pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Funds or its agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

              In unusual circumstances, instead of valuing securities in the
            usual manner, the Funds 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 the NYSE Close.

            Fund Distributions

              Each Fund distributes substantially all of its net investment
            income to shareholders in the form of dividends. You begin earning
            dividends on Fund shares the day after the Trust receives your
            purchase payment. Dividends paid by each Fund with respect to each
            class of shares are calculated in the same manner and at the same
            time. The following shows when each Fund intends to declare and
            distribute income dividends to shareholders of record.

<TABLE>
<CAPTION>
                                                   Declared Daily
                                                      and Paid     Declared and
            Fund                                      Monthly     Paid Quarterly
            --------------------------------------------------------------------
            <S>                                    <C>            <C>
            Fixed Income Funds                           .
            --------------------------------------------------------------------
            Convertible, Strategic Balanced
             and StocksPLUS Funds                                       .
            --------------------------------------------------------------------
</TABLE>

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

                                                                  Prospectus  42
<PAGE>

            You can choose from the following distribution options:

              . Reinvest all distributions in additional Class D shares of
            your Fund at NAV. This will be done unless you elect another
            option.

              . Invest all distributions in Class D shares of any other Fund
            or any series of PIMCO Funds: Multi-Manager Series which offers
            Class D shares at NAV. You must have an account existing in the
            Fund or series selected for investment with the identical
            registered name. This option must be elected when your account is
            set up.

              . Receive all distributions in cash (either paid directly to you
            or credited to your account with your financial service firm).
            This option must be elected when your account is set up.

              Your financial service firm may offer additional distribution
            reinvestment programs or options. Please contact your firm for
            details.

              You do not pay any sales charges on shares you receive through
            the reinvestment of Fund distributions. If you elect to receive
            Fund distributions in cash and the postal or other delivery
            service is unable to deliver checks to your address of record, the
            Trust's Transfer Agent will hold the returned checks for your
            benefit in a non-interest bearing account.

            Tax Consequences

              . Taxes on Fund distributions. If you are subject to U.S. federal
            income tax, you will be subject to tax on Fund distributions whether
            you received them in cash or reinvested in additional shares of the
            Funds. For federal income tax purposes, Fund distributions will be
            taxable to you as either ordinary income or capital gains.

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

              Fund distributions are taxable to you even if they are paid from
            income or gains earned by a Fund prior to your investment and thus
            were included in the price you paid for your shares. For example,
            if you purchase shares on or just before the record date of a Fund
            distribution, you will pay full price for the shares and may
            receive a portion of your investment back as a taxable
            distribution.

              . Taxes when you sell (redeem) or exchange your shares. Any gain
            resulting from the sale of Fund shares will generally be subject
            to federal income tax. When you exchange shares of a Fund for
            shares of another series, the transaction will be treated as a
            sale of the Fund shares for these purposes, and any gain on those
            shares will generally be subject to federal income tax.

              . Consult your tax advisor about other possible tax consequences.
            This is a summary of certain federal income tax consequences of
            investing in a Fund. You should consult your tax advisor for more
            information on your own tax situation, including possible state,
            local and foreign tax consequences.

              . A Note on the Real Return Bond Fund. Periodic adjustments for
            inflation to the principal amount of an inflation-indexed bond may
            give rise to original issue discount, which will be includable in
            the Fund's gross income. Due to original issue discount, the Fund
            may be required to make annual distributions to shareholders that
            exceed the cash received, which may cause the Fund to liquidate
            certain investments when it is not advantageous to do so. Also, if
            the principal value of an inflation-indexed bond is adjusted
            downward due to deflation, amounts previously distributed in the
            taxable year may be characterized in some circumstances as a
            return of capital.

              . A Note on the Municipal Funds. Dividends paid to shareholders
            of the Municipal Funds and derived from Municipal Bond interest
            are expected to be designated by the Funds as "exempt-interest
            dividends" and you may generally exclude such dividends from gross
            income for federal income tax purposes. The federal tax exemption
            for "exempt-interest dividends" from Municipal Bonds does not
            necessarily result in the exemption of such dividends from state
            and local taxes, although the California Intermediate Municipal
            Bond Fund and the New York Intermediate Municipal Bond Fund intend
            to arrange their affairs so that a portion of such distributions
            will be exempt from state taxes in

43  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            the respective state. Each Municipal Fund may invest a portion of
            its assets in securities that generate income that is not exempt
            from federal or state income tax. Dividends derived from taxable
            interest or capital gains will be subject to federal income tax.
            The interest on "private activity" bonds is a tax-preference item
            for purposes of the federal alternative minimum tax. As a result,
            if you are subject to the alternative minimum tax, income derived
            from "private activity" bonds will not be exempt from federal
            income tax. The Municipal Funds seek to produce income that is
            generally exempt from federal income tax and will not benefit
            investors in tax-sheltered retirement plans or individuals not
            subject to federal income tax. Further, the California and New
            York Intermediate Municipal Bond Funds seek to produce income that
            is generally exempt from the relevant state's income tax and will
            not benefit individuals that are not subject to that state's
            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 Fund dividends and capital distributions.
            Please see the Statement of Additional Information for additional
            information regarding the tax aspects of investing in the Funds.

            Characteristics and Risks of Securities and Investment Techniques

            This section provides additional information about some of the
            principal investments and related risks of the Funds described
            under "Summary Information" above. It also describes
            characteristics and risks of additional securities and investment
            techniques that may be used by the Funds 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
            of securities and investment techniques that may be used by the
            Funds. As with any mutual fund, investors in the Funds 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 Funds.

Securities  Most of the Funds in this prospectus seek maximum total return.
Selection   The total return sought by a Fund consists of both income earned
            on a Fund's investments and capital appreciation, if any, arising
            from increases in the market value of a Fund'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 selecting securities for a Fund, PIMCO develops an outlook for
            interest rates, currency exchange rates and the economy; analyzes
            credit and call risks, and uses other security selection
            techniques. The proportion of a Fund'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. economy and the economies of other
            countries in the world, the financial markets and other factors.

             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.        U.S. Government Securities are obligations of, or guaranteed by,
Government  the U.S. Government, its agencies or government-sponsored
Securities  enterprises. 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.

Municipal   Municipal bonds are generally issued by states and local
Bonds       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. The types of municipal bonds in which the
            Funds may invest include municipal lease obligations. The Funds
            may also invest in securities issued by entities whose underlying
            assets are municipal bonds.
                                                                   Prospectus 44
<PAGE>

Mortgage-   Each Fund may invest in mortgage- or other asset-backed
Related     securities. Except for the Short Duration Municipal Income,
and Other   Municipal Bond, California Intermediate Municipal Bond, New York
Asset-      Intermediate Municipal Bond and Convertible Funds, each Fund may
Backed      invest all of its assets in such securities. Mortgage-related
Securities  securities include mortgage pass-through securities,
            collateralized mortgage obligations ("CMOs"), commercial mortgage-
            backed securities, mortgage dollar rolls, CMO residuals, stripped
            mortgage-backed securities ("SMBSs") 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 a Fund 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 SMBS has one class receiving all of the interest from
            the mortgage assets (the interest-only, or "IO" class), while the
            other class will receive all of the principal (the principal-only,
            or "PO" class). The yield to maturity on an IO 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 a
            Fund's yield to maturity from these securities. A Fund may not
            invest more than 5% of its assets in any combination of IO, PO, or
            inverse floater securities. The Funds may invest in other asset-
            backed securities that have been offered to investors.

Loan        Certain Funds may invest in fixed- and floating-rate loans, which
Participa-  investments generally will be in the form of loan participations
tions       and assignments of portions of such loans. Participations and
and         assignments involve special types of risk, including credit risk,
Assign-     interest rate risk, liquidity risk, and the risks of being a
ments       lender. If a Fund 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.

Corporate   Corporate debt securities are subject to the risk of the issuer's
Debt        inability to meet principal and interest payments on the
Securities  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.

High        Securities rated lower than Baa by Moody's Investors Service, Inc.
Yield       ("Moody's") or lower than BBB by Standard & Poor's Ratings
Securities  Services ("S&P") 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 predominately 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 this 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 Fund 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 Fund 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
            Fund may

45  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            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 Fund invests in high
            yield and/or unrated securities, the Fund's success in achieving
            its investment objective may depend more heavily on the portfolio
            manager's creditworthiness analysis than if the Fund invested
            exclusively in higher-quality and rated securities.

Variable    Variable and floating rate securities provide for a periodic
and         adjustment in the interest rate paid on the obligations. Each Fund
Floating    may invest in floating rate debt instruments ("floaters") and
Rate        engage in credit spread trades. While floaters provide a certain
Securities  degree of protection against rises in interest rates, a Fund will
            participate in any declines in interest rates as well. Each Fund
            may also invest in inverse floating rate debt instruments
            ("inverse floaters"). An inverse floater may exhibit greater price
            volatility than a fixed rate obligation of similar credit quality.
            A Fund may not invest more than 5% of its assets in any
            combination of inverse floater, interest only, or principal only
            securities.

Inflation-  Inflation-indexed bonds are fixed income securities whose
Indexed     principal value is periodically adjusted according to the rate of
Bonds       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.

Event-      Each Fund may invest in "event-linked bonds," which are fixed
Linked      income securities for which the return of principal and payment of
Bonds       interest is contingent on the non-occurrence of a specific
            "trigger" event, such as a hurricane, earthquake, or other
            physical or weather-related phenomenon. Some event-linked bonds
            are commonly referred to as "catastrophe bonds." If a trigger
            event occurs, a Fund may lose a portion or all of its principal
            invested in the bond. Event-linked bonds often provide for an
            extension of maturity to process and audit loss claims where a
            trigger event has, or possibly has, occurred. An extension of
            maturity may increase volatility. Event-linked bonds may also
            expose the Fund to certain unanticipated risks including credit
            risk, adverse regulatory or jurisdictional interpretations, and
            adverse tax consequences. Event-linked bonds may also be subject
            to liquidity risk.

Convertible Each Fund may invest in convertible securities. Convertible
and         securities are generally preferred stocks and other securities,
Equity      including fixed income securities and warrants, that are
Securities  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 Fund may be forced to convert
            a security before it would otherwise choose, which may have an
            adverse effect on the Fund's ability to achieve its investment
            objective.

             While the Fixed Income Funds 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 Fund may
            consider convertible securities or equity securities to gain
            exposure to such investments.

             Equity securities generally have greater price volatility than
            fixed income securities. The market price of equity securities
            owned by a Fund may go up or down, sometimes rapidly or
            unpredictably. Equity securities may decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The value of
            an equity security may also 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 or
            services.
                                                                   Prospectus 46
<PAGE>

Foreign     Investing in foreign securities involves special risks and
(Non-       considerations not typically associated with investing in U.S.
U.S.)       securities. Shareholders should consider carefully the substantial
Securities  risks involved for Funds that invest 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 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.

             Certain Funds also may invest in sovereign debt issued by
            governments, their agencies or instrumentalities, or other
            government-related entities. Holders of sovereign debt may be
            requested to participate in the rescheduling of such debt and to
            extend further loans to governmental entities. In addition, there
            is no bankruptcy proceeding by which defaulted sovereign debt may
            be collected.

              . Emerging Market Securities. The Emerging Markets Bond Fund
            invests primarily in securities of issuers based in countries with
            developing (or "emerging market") economies, while the Short-Term
            and Low Duration Funds may invest up to 5% of their assets in such
            securities and each remaining Fund that may invest in foreign
            securities may invest up to 10% of its assets in such securities.
            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; 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 Fund. 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 Fund 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.

             Each Fund (except the Municipal Bond, Short Duration Municipal
            Income, California Intermediate Municipal Bond, and New York
            Intermediate Municipal Bond Funds) 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 a Fund may
            be subject to restructuring arrangements or to requests for new
            credit, which may cause the Fund to suffer a loss of interest or
            principal on any of its holdings.

Foreign     A Fund that invests directly in foreign currencies or in
(Non-       securities that trade in, or receive revenues in, foreign
U.S.)       currencies will be subject to currency risk. Foreign currency
Currencies  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

47  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            central banks, or by currency controls or political developments.
            For example, uncertainty surrounds the introduction of the euro (a
            common currency unit for the European Union) and the effect it may
            have on the value of European currencies as well as securities
            denominated in local European currencies. These and other
            currencies in which the Funds' assets are denominated may be
            devalued against the U.S. dollar, resulting in a loss to the
            Funds.

              . Foreign Currency Transactions. Funds that invest in securities
            denominated in foreign currencies 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 a Fund'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 a Fund 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 realized if the value of the hedged
            currency increases. A Fund 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 a Fund 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 Fund to benefit
            from favorable fluctuations in relevant foreign currencies. A Fund
            may use one currency (or a basket of currencies) to hedge against
            adverse changes in the value of another currency (or a basket of
            currencies) when exchange rates between the two currencies are
            positively correlated. The Fund 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.


Repurchase  Each Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer and agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund 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     Each Fund may enter into reverse repurchase agreements and dollar
Repurchase  rolls, subject to a Fund's limitations on borrowings. A reverse
Agreements, repurchase agreement or dollar roll involves the sale of a
Dollar      security by a Fund and its agreement to repurchase the instrument
Rolls And   at a specified time and price, and may be considered a form of
Other       borrowing for some purposes. A Fund will segregate assets
Borrowings  determined to be liquid by PIMCO in accordance with procedures
            established by the Board of Trustees or otherwise cover its
            obligations under reverse repurchase agreements, dollar rolls and
            other borrowings. Reverse repurchase agreements, dollar rolls and
            other forms of borrowings may create leveraging risk for a Fund.

             Each Fund may borrow money to the extent permitted under the
            Investment Company Act of 1940 ("1940 Act"), as amended. This
            means that, in general, a Fund may borrow money from banks for any
            purpose on a served basis in an amount up to 1/3 of the Fund's
            total assets. A Fund may also borrow money for temporary
            administrative purposes on an unsecured basis in an amount not to
            exceed 5% of the Fund's total assets.

Derivatives Each Fund 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 swap agreements. Each Fund may invest
            some or all of its assets in derivative instruments. A portfolio
            manager may decide not to employ any of these strategies and there
            is no assurance that any derivatives strategy used by a Fund will
            succeed. A description of these and other derivative instruments
            that the Funds may use are described under "Investment Objectives
            and Policies" in the Statement of Additional Information.

             A Fund's use of derivative instruments involves risks different
            from, or possibly 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 Funds.
                                                                   Prospectus 48

<PAGE>

             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 Fund uses derivatives
            for leverage, investments in that Fund will tend to be more
            volatile, resulting in larger gains or losses in response to
            market changes. To limit leverage risk, each Fund 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 Fund
            will engage in derivatives transactions at any time or from time
            to time. A Fund'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 Fund'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 Fund, the Fund 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 Fund investments. A Fund may also have to buy or sell a
            security at a disadvantageous time or price because the Fund 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 Fund. 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 Fund's use of derivatives may cause
            the Fund to realize higher amounts of short-term capital gains
            (generally taxed at ordinary income tax rates) than if the Fund
            had not used such instruments.

Delayed     The Funds (except the Municipal Bond Fund) may also enter into, or
Funding     acquire participations in, delayed funding loans and revolving
Loans and   credit facilities, in which a lender agrees to make loans up to a
Revolving   maximum amount upon demand by the borrower during a specified
Credit      term. These commitments may have the effect of requiring a Fund to
Facilities  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 a Fund 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.

When-       Each Fund may purchase securities which it is eligible to purchase
Issued,     on a when-issued basis, may purchase and sell such securities for
Delayed     delayed delivery and may make contracts to purchase such
Delivery    securities for a fixed price at a future date beyond normal
and         settlement time (forward commitments). When-issued transactions,
Forward     delayed delivery purchases and forward commitments involve a risk
Commitment  of loss if the value of the securities declines prior to the
Transac-    settlement date. This risk is in addition to the risk that the
tions       Fund's

49  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            other assets will decline in the value. Therefore, these
            transactions may result in a form of leverage and increase a
            Fund's overall investment exposure. Typically, no income accrues
            on securities a Fund has committed to purchase prior to the time
            delivery of the securities is made, although a Fund may earn
            income on securities it has segregated to cover these positions.

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

             Subject to the restrictions and limitations of the 1940 Act, each
            Fund may, in the future, elect to pursue its investment objectives
            by investing in one or more underlying investment vehicles or
            companies that have substantially similar investment objectives,
            policies and limitations as the Fund.

Short       Each Fund may make short sales as part of its overall portfolio
Sales       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.
            Short sales expose a Fund 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 Fund. A Fund making a short sale 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.

Illiquid    Each Fund may invest up to 15% of its net assets in illiquid
Securities  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 Fund 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.

Loans of    For the purpose of achieving income, each Fund may lend its
Portfolio   portfolio securities to brokers, dealers, and other financial
Securities  institutions provided a number of conditions are satisfied,
            including that the loan is fully collateralized. Please see
            "Investment Objectives and Policies" in the Statement of
            Additional Information for details. When a Fund lends portfolio
            securities, its investment performance will continue to reflect
            changes in the value of the securities loaned, and the Fund 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 Fund may pay
            lending fees to a party arranging the loan.

Portfolio   The length of time a Fund has held a particular security is not
Turnover    generally a consideration in investment decisions. A change in the
            securities held by a Fund is known as "portfolio turnover." Each
            Fund 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 Fund, 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 generally taxed at ordinary income tax rates).
            The trading costs and tax effects associated with portfolio
            turnover may adversely affect a Fund's performance.

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

Changes     The investment objective of each Fund is fundamental and may not
in          be changed without shareholder approval. Unless otherwise stated,
Investment  all other investment policies of the Funds may be changed by the
Objectives  Board of Trustees without shareholder approval.
and
Policies
                                                                   Prospectus 50
<PAGE>

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

Other       The Funds may invest in other types of securities and use a
Investments variety of investment techniques and strategies which are not
and         described in this Prospectus. These securities and techniques may
Techniques  subject the Funds 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 Funds.

51  PIMCO Funds: Pacific Investment Management Series
<PAGE>

                      (THIS PAGE INTENTIONALLY LEFT BLANK)

                                                                  Prospectus  52
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help a shareholder
            understand the financial performance of Class D shares of each
            Fund since the class of shares was first offered. Certain
            information reflects financial results for a single Fund share.
            The total returns in the table represent the rate that an investor
            would have earned or lost on an investment in Class D shares of a
            Fund, assuming reinvestment of all dividends and distributions.
            The information for the fiscal year ended March 31, 1999 has been
            audited by PricewaterhouseCoopers LLP, whose report, along with
            each Fund's financial statements, are included in the Trust's
            annual report to shareholders. The annual report is incorporated
            by reference in the Statement of Additional Information and is
            available free of charge upon request from the Distributor. The
            information for the semi-annual period ended September 30, 1999 is
            unaudited.


<TABLE>
<CAPTION>
                 Net Asset             Net Realized  Total Income Dividends  Dividends in  Distributions Distributions
Year or            Value      Net     and Unrealized (Loss) from   from Net  Excess of Net   from Net    in Excess of
Period           Beginning Investment Gain (Loss) on  Investment  Investment  Investment     Realized    Net Realized
Ended            of Period Income(b)  Investments(b)  Operations    Income      Income     Capital Gains Capital Gains
- ----------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>          <C>        <C>           <C>           <C>
Short-Term Fund (a)
 09/30/1999 (c)   $10.03     $0.26        $(0.06)       $0.20       $(0.27)     $ 0.00        $ 0.00         $0.00
 03/31/1999        10.07      0.53         (0.03)        0.50        (0.53)       0.00          0.00         (0.01)
Low Duration Fund (a)
 09/30/1999 (c)    10.10      0.29         (0.20)        0.09        (0.29)       0.00          0.00          0.00
 03/31/1999        10.19      0.60         (0.03)        0.57        (0.60)       0.00         (0.01)        (0.05)
Total Return Fund (a)
 09/30/1999 (c)    10.36      0.29         (0.30)       (0.01)       (0.29)       0.00          0.00          0.00
 03/31/1999        10.66      0.59          0.12         0.71        (0.59)       0.00         (0.24)        (0.18)
Total Return Mortgage Fund
(a)
 09/30/1999 (c)    10.19      0.27         (0.21)        0.06        (0.27)       0.00          0.00          0.00
 03/31/1999        14.13      0.79          1.38         2.17        (0.79)       0.00         (1.24)         0.00
Foreign Bond Fund (a)
 09/30/1999 (c)    10.63      0.30         (0.49)       (0.19)       (0.30)       0.00          0.00          0.00
 03/31/1999        10.83      0.53          0.15         0.68        (0.53)       0.00         (0.10)        (0.25)
High Yield Fund (a)
 09/30/1999 (c)    11.23      0.44         (0.50)       (0.06)       (0.44)       0.00          0.00          0.00
 03/31/1999        11.68      0.89         (0.45)        0.44        (0.88)      (0.01)         0.00          0.00
Municipal Bond Fund (a)
 09/30/1999 (c)    10.12      0.21         (0.56)       (0.35)       (0.21)       0.00          0.00          0.00
 03/31/1999         9.98      0.40          0.14         0.54        (0.40)       0.00          0.00          0.00
Real Return Bond Fund (a)
 09/30/1999 (c)     9.83      0.29          0.02         0.31        (0.32)       0.00          0.00          0.00
 03/31/1999         9.77      0.47          0.09         0.56        (0.44)      (0.06)         0.00          0.00
Strategic Balanced Fund
(a)
 09/30/1999 (c)    12.75      0.30         (0.36)       (0.06)       (0.11)       0.00          0.00          0.00
 03/31/1999        12.65      0.79          0.60         1.39        (0.62)       0.00         (0.67)         0.00
StocksPLUS Fund (a)
 09/30/1999 (c)    14.27      0.26         (0.16)        0.10        (0.23)       0.00          0.00          0.00
 03/31/1999        14.13      0.79          1.38         2.17        (0.79)       0.00         (1.24)         0.00
</TABLE>
- -------
(a) Commenced operations on April 8, 1998.
(b) Per share amounts based on average number of shares outstanding during the
    period.
(c) Unaudited.
(d) Ratio of expenses to average net assets excluding interest expense is 0.95%

53  PIMCO Funds: Pacific Investment Management Series
<PAGE>



<TABLE>
<CAPTION>
                                                                  Ratio of Net
Tax Basis                Net Asset         Net Assets  Ratio of    Investment
 Return                    Value              End     Expenses to  Income to   Portfolio
   of          Total        End    Total   of Period    Average     Average    Turnover
 Capital   Distributions of Period Return    (000's)  Net Assets   Net Assets    Rate
- ----------------------------------------------------------------------------------------
<S>        <C>           <C>       <C>     <C>        <C>         <C>          <C>
              $(0.27)     $ 9.96    1.97%   $ 4,119      0.75%+       5.27%+       21%
   $0.00       (0.54)      10.03    5.10      2,278      0.75         5.05         47

               (0.29)       9.90    0.95      9,288      0.75+        5.85+        52
    0.00       (0.66)      10.10    5.77      6,481      0.75         5.81        245

               (0.29)      10.06   (0.09)    57,434      0.78+        5.66+        46
    0.00       (1.01)      10.36    6.73     34,839      0.75         5.21        154

               (0.27)       9.98    0.54        129      0.91+        5.34+       190
    0.00       (0.63)      10.19    5.41        183      0.90         5.15        158

               (0.30)      10.14   (1.85)    10,940      1.04+        5.70+        90
    0.00       (0.88)      10.63    6.46      8,513      0.95         4.82        376

               (0.44)      10.73   (0.52)    18,947      0.90+        8.05+        17
    0.00       (0.89)      11.23    4.00      9,065      0.90         8.07         39

               (0.21)       9.56   (3.48)       362      0.86+        4.24+        48
    0.00       (0.40)      10.12    5.47        242      0.85         3.99         70

               (0.32)       9.82    3.19      5,436      0.92+        5.90+       103
    0.00       (0.50)       9.83    5.89        193      0.92         4.75        438

               (0.11)      12.58    0.25        223      1.05+        4.54+        34
    0.00       (1.29)      12.75   11.45        173      1.05         6.41         82

               (0.23)      14.14    0.67      2,873      1.05+        3.52+        46
    0.00       (2.03)      14.27   16.69      1,721      1.05         8.12         81
</TABLE>
- -------
+ Annualized

                                                                  Prospectus  54
<PAGE>

            Appendix A
            Description of Securities Ratings

            A Fund's investments may range in quality from securities rated in
            the lowest category in which the Fund is 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 Fund'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 ("Junk Bonds") are
            those rated lower than Baa by Moody's or BBB by S&P and comparable
            securities. They are deemed to be 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     Corporate and Municipal Bond Ratings
Investors
Service,      Aaa: Bonds which are rated Aaa are judged to be of the best
Inc.        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.

              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
            indicates a mid-range ranking; and the modifier 3 indicates that
            the issue ranks in the lower end of its generic rating category.

                                                                 Prospectus  A-1
<PAGE>

            Corporate Short-Term Debt Ratings

              Moody's short-term debt ratings are opinions of the ability 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.

            Short-Term Municipal Bond Ratings

              There are four rating categories for short-term municipal bonds
            that define an investment grade situation, which are listed below.
            In the case of variable rate demand obligations (VRDOs), a two-
            component rating is assigned. The first element represents an
            evaluation of the degree of risk associated with scheduled
            principal and interest payments, and the other represents an
            evaluation of the degree of risk associated with the demand
            feature. The short-term rating assigned to the demand feature of
            VRDOs is designated as VMIG. When either the long- or short-term
            aspect of a VRDO is not rated, that piece is designated NR, e.g.,
            Aaa/NR or NR/VMIG 1. MIG ratings terminate at the retirement of
            the obligation while VMIG rating expiration will be a function of
            each issue's specific structural or credit features.

              MIG 1/VMIG 1: This designation denotes best quality. There is
            present strong protection by established cash flows, superior
            liquidity support or demonstrated broad-based access to the market
            for refinancing.

              MIG 2/VMIG 2: This designation denotes high quality. Margins of
            protection are ample although not so large as in the preceding
            group.

              MIG 3/VMIG 3: This designation denotes favorable quality. All
            security elements are accounted for but there is lacking the
            undeniable strength of the preceding grades. Liquidity and cash
            flow protection may be narrow and market access for refinancing is
            likely to be less well established.

              MIG 4/VMIG 4: This designation denotes adequate quality.
            Protection commonly regarded as required of an investment security
            is present and although not distinctly or predominantly
            speculative, there is specific risk.

              SG: This designation denotes speculative quality. Debt
            instruments in this category lack margins of protection.

Standard    Corporate and Municipal Bond Ratings
& Poor's
Ratings     Investment Grade
Services      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-2  PIMCO Funds: Pacific Investment Management Series
<PAGE>

              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 than
            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.

              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.

                                                              Prospectus  A-3
<PAGE>

Commercial  An S&P commercial paper rating is a current assessment of the
Paper       likelihood of timely payment of debt having an original maturity
Rating      of no more than 365 days. Ratings are graded into several
Definitions 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 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 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.

A-4  PIMCO Funds: Pacific Investment Management Series
<PAGE>

            PIMCO Funds: Pacific Investment Management Series

            The Trust's Statement of Additional Information ("SAI") and annual
            and semi-annual reports to shareholders include additional
            information about the Funds. The SAI and the financial statements
            included in the Funds' most recent annual report to shareholders
            are incorporated by reference into this Prospectus, which means
            they are part of this Prospectus for legal purposes. The Funds'
            annual report discusses the market conditions and investment
            strategies that significantly affected each Fund's performance
            during its last fiscal year.

            You may get free copies of any of these materials, request other
            information about a Fund, or make shareholder inquiries by calling
            the Trust at 1-888-87-PIMCO, or by writing to:

              PIMCO Funds Distributors LLC
              2187 Atlantic Street
              Stamford, CT 06902

            You may also contact your financial service firm for details.

            You may review and copy information about the Trust, including its
            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
            Trust on the Commission's Web site at www.sec.gov. You may get
            copies of this information, with payment of a duplication fee, by
            writing the Public Reference Section of the Commission,
            Washington, D.C. 20549-6009, or by electronic request @
            [email protected].

            You can also visit our Web site at www.pimcofunds.com for
            additional information about the Funds.

            [LOGO OF PIMCO FUNDS APPEARS HERE]


            Investment Company File No. 811-5028

<PAGE>

            -------------------------------------------------------------------
PIMCO       INVESTMENT ADVISER AND ADMINISTRATOR
Funds:      PIMCO, 840 Newport Center Drive, Suite 300, Newport Beach, CA
Pacific     92660
Investment

            -------------------------------------------------------------------
Management  DISTRIBUTOR
Series      PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT
            06902-6896

            -------------------------------------------------------------------
            CUSTODIAN
            State Street Bank & Trust Co., 801 Pennsylvania, Kansas City, MO
            64105

            -------------------------------------------------------------------
            SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT
            PFPC Inc., P.O. Box 9688, Providence, RI 02940-9688

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

            -------------------------------------------------------------------
            LEGAL COUNSEL
            Dechert Price & Rhoads, 1775 Eye Street N.W., Washington, D.C.
            20006-2401

            -------------------------------------------------------------------
            For further information about the PIMCO Funds, call 1-800-426-0107
            or visit our Web site at http://www.pimcofunds.com.

<PAGE>

                           PIMCO Funds is on the Web

                              www.pimcofunds.com

A Partial List of What's Available:

Daily Share Prices

Daily Manager Commentary

Current and Historical Fund Performance

Lipper Rankings

Morningstar Ratings

Listing of Fund Portfolio Holdings

Risk Analysis

Fund Manager Bios

Resources for Investment Professionals

Through the PIMCO Funds Website, at www.pimcofunds.com, you and your financial
advisor have around-the-clock access to the most timely and comprehensive
information available on PIMCO Funds.

[GRAPHIC]

     In addition, the site includes daily commentary from our fund managers,
with insights on the economy and other factors affecting the stock and bond
markets.

[GRAPHIC]

Investment Insight
The Investment Insight section provides an overview of the investment management
firms under the PIMCO Advisors L.P. umbrella. You'll find an explanation of each
firm's investment process, biographies of the investment team, manager updates
and more.

[GRAPHIC]

Fund Information
In the Fund Information section you'll access detailed profiles of all the PIMCO
Funds, including current and historical performance, Lipper rankings and
Morningstar ratings.

     Additionally, we provide a summary of a fund's portfolio -- complete with
risk analysis data. You can also obtain daily fund share prices. Please read the
relevant prospectus carefully before you invest in any PIMCO Fund.

Not part of the Prospectus

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

                      P I C M O
                          Funds

PIMCO Funds
Distributors LLC

2187 Atlantic Street
Stanford, CT 06902-6896

<PAGE>


                            PIMCO Funds Prospectus

Pacific
Investment
Management
Series

March 31, 2000

Share Classes     NATIONAL TAX EXEMPT BOND FUNDS
A  B  C           Municipal Bond Fund

Share Class       STATE-SPECIFIC TAX EXEMPT BOND FUNDS
A                 California Intermediate Municipal
                  Bond Fund

                  New York Intermediate Municipal
                  Bond Fund

                                                                           PIMCO
                                                                        --------
                                                                           FUNDS

This cover is not part of the Prospectus

<PAGE>

            PIMCO Funds Prospectus

PIMCO       This Prospectus describes 3 mutual municipal bond funds offered by
Funds:      PIMCO Funds: Pacific Investment Management Series. The Funds
Pacific     provide access to the professional investment advisory services
Investment  offered by Pacific Investment Management Company ("PIMCO"). As of
Management  December 31, 1999 PIMCO managed approximately $186 billion in
Series      assets.

March 31,   This Prospectus explains what you should know about the Funds
2000        before you invest. Please read it carefully.

Share       The Securities and Exchange Commission has not approved or
Classes     disapproved these securities, or determined if this Prospectus is
A, B and C  truthful or complete. Any representation to the contrary is a
            criminal offense.

  Pacific Investment Management Series
1
<PAGE>



            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summaries
           California Intermediate Municipal Bond Fund....................   5
           Municipal Bond Fund............................................   7
           New York Intermediate Municipal Bond Fund......................   9
         Summary of Principal Risks.......................................  11
         Management of the Funds..........................................  13
         Investment Options...............................................  14
         How Fund Shares Are Priced.......................................  17
         How to Buy and Sell Shares.......................................  17
         Fund Distributions...............................................  21
         Tax Consequences.................................................  21
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  22
         Financial Highlights.............................................  28
         Appendix A--Description of Securities Ratings.................... A-1
</TABLE>

                                                                               2
                                                                   Prospectus
<PAGE>

            Summary Information

 The table below compares certain investment characteristics of the Funds.
 Other important characteristics are described in the individual Fund
 Summaries beginning on page 5. Following the table are certain key concepts
 which are used throughout the prospectus.

<TABLE>
<CAPTION>
                                                                                        Non-U.S.
                                                                                        Dollar
                                                                         Credit         Denominated
                                   Main Investments           Duration   Quality(1)     Securities
 --------------------------------------------------------------------------------------------------
  <C>            <C>               <S>                        <C>        <C>            <C>
  Tax Exempt     Municipal Bond    Intermediate to long-      3-10 years Ba to Aaa; max     0%
  Bond Funds                       term maturity municipal               10% below Baa
                                   securities (exempt from
                                   federal income tax)
            ---------------------------------------------------------------------------------------
                 California        Intermediate maturity      3-7 years   B to Aaa; max     0%
                 Intermediate      municipal securities                   10% below Baa
                 Municipal Bond    (exempt from federal and
                                   California income tax)
            ---------------------------------------------------------------------------------------
                 New York          Intermediate maturity      3-7 years   B to Aaa; max     0%
                 Intermediate      municipal securities                   10% below Baa
                 Municipal Bond    (exempt from federal and
                                   New York income tax)
 --------------------------------------------------------------------------------------------------
</TABLE>

 (1) As rated by Moody's Investors Service, Inc., or equivalently rated by
     Standard & Poor's Rating Service, or if unrated, determined by PIMCO to
     be of comparable quality.

Fixed       While the Funds will primarily invest in debt securities whose
Income      interest is, in the opinion of bond counsel for the issuer at the
Instruments time of issuance, exempt from federal income tax ("Municipal
            Bonds"), the term "Fixed Income Instruments" as used generally in
            this Prospectus includes:

            .  securities issued or guaranteed by the U.S. Government, its
               agencies or government-sponsored enterprises ("U.S. Government
               Securities");
            .  corporate debt securities, including convertible securities and
               corporate commercial paper;
            .  mortgage-backed and other asset-backed securities;
            .  inflation-indexed bonds issued both by governments and
               corporations;
            .  structured notes, including hybrid or "indexed" securities,
               event-linked bonds and loan participations;
            .  delayed funding loans and revolving credit facilities;
            .  bank certificates of deposit, fixed time deposits and bankers'
               acceptances;
            .  repurchase agreements and reverse repurchase agreements;
            .  debt securities issued by states or local governments and their
               agencies, authorities and other instrumentalities;
            .  obligations of foreign governments or their subdivisions,
               agencies and instrumentalities; and
            .  obligations of international agencies or supranational
               entities.

3 Pacific Investment Management Series
<PAGE>

            Summary Information (continued)

Duration    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 Fund with a longer average portfolio duration
            will be more sensitive to changes in interest rates than a Fund
            with a shorter average portfolio duration.

Credit      In this Prospectus, references are made to credit ratings of debt
Ratings     securities which measure an issuer's expected ability to pay
            principal and interest on time. Credit ratings are determined by
            rating organizations, such as Standard & Poor's Rating Service
            ("S&P") or Moody's Investors Services, Inc. ("Moody's"). The
            following terms are generally used to describe the credit quality
            of debt securities depending on the security's credit rating or,
            if unrated, credit quality as determined by PIMCO:

            .  high quality
            .  investment grade
            .  below investment grade ("high yield securities" or "junk
               bonds")

            For a further description of credit ratings, see "Appendix A--
            Description of Securities Ratings."

Fund        The Funds provide a range of investment choices. The following
Descrip-    summaries identify each Fund's investment objective, principal
tions,      investments and strategies, principal risks, performance
Performance information and fees and expenses. A more detailed "Summary of
and Fees    Principal Risks" describing principal risks of investing in the
            Funds begins after the Fund Summaries.

             It is possible to lose money on investments in the Funds.

             An investment in a Fund is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.
                                                                   Prospectus
                                                                               4
<PAGE>

            PIMCO California Intermediate Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective   Fund Focus           Credit Quality
Investments   Seeks high             Intermediate         B to Aaa; maximum
and           current income         maturity             10% below Baa
Strategies    exempt from            municipal
              federal and            securities           Dividend Frequency
              California income      (exempt from         Declared daily and
              tax. Capital           federal and          distributed monthly
              appreciation is a      California income
              secondary              tax)
              objective.
                                     Average Portfolio
              Fund Category          Duration
              Tax Exempt Bond        3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund invests under normal circumstances at least 65% of
            its assets in debt securities whose interest is, in the opinion of
            bond counsel for the issuer at the time of issuance, exempt from
            regular federal income tax and California income tax ("California
            Municipal Bonds"). California Municipal Bonds generally are issued
            by or on behalf of the State of California and its political
            subdivisions, financing authorities and their agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three- to seven-year time frame based on the PIMCO's forecast
            for interest rates. The Fund will seek income that is high
            relative to prevailing rates from Municipal Bonds. Capital
            appreciation, if any, generally arises from decreases in interest
            rates or improving credit fundamentals for a particular state,
            municipality or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls). The Fund may invest in derivative
            instruments, such as options, futures contracts or swap
            agreements, or in mortgage- or asset-backed securities. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income.

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

              . Interest Rate Risk   . Issuer Risk           . Mortgage Risk
              . Credit Risk          . Issuer Non-Diversifi- . Leveraging Risk
              . California State       cation Risk           . Management Risk
                Specific Risk        . Liquidity Risk
              . Market Risk          . Derivatives Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

5 Pacific Investment Management Series
<PAGE>


            PIMCO California Intermediate Municipal Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>                  <C>
                              Maximum Sales Charge (Load) Imposed
                              on Purchases (as a percentage of offering price)
            -----------------------------------------------------------
         Class A              3%
            -----------------------------------------------------------
</TABLE>

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

<TABLE>
         <S>          <C>      <C>            <C>           <C>
                               Distribution                 Total Annual
                      Advisory and/or Service Other         Fund Operating
         Share Class  Fees     (12b-1) Fees   Expenses(/1/) Expenses
            --------------------------------------------------------------
         Class A      0.25%    0.25%          0.35%         0.85%
            --------------------------------------------------------------
</TABLE>

            (1) Other expenses reflect a 0.35% Administration Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
                      <S>              <C>             <C>              <C>             <C>    <C>    <C>     <C>
         Share Class   Year 1          Year 3          Year 5           Year 10         Year 1 Year 3 Year 5  Year 10
            ---------------------------------------------------------------------------------------------------------
         Class A       $384            $563            $757             $1,318          $384   $563   $757    $1,318
            ---------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               6
<PAGE>

            PIMCO Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment            Fund Focus          Credit Quality
Investments   Objective             Intermediate to     Ba to Aaa; maximum
and           Seeks high current    long-term           10% below Baa
Strategies    income exempt from    maturity
              federal income        municipal           Dividend Frequency
              tax, consistent       securities          Declared daily and
              with preservation     (exempt from        distributed monthly
              of capital.           federal income
              Capital               tax)
              appreciation is a
              secondary             Average Portfolio
              objective.            Duration
                                    3-10 years
              Fund Category
              Tax Exempt Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in debt
            securities whose interest is, in the opinion of bond counsel for
            the issuer at the time of issuance, exempt from federal income tax
            ("Municipal Bonds"). Municipal Bonds generally are issued by or on
            behalf of states and local governments and their agencies,
            authorities and other instrumentalities.

             The Fund may invest up to 20% of its net assets in U.S.
            Government Securities, money market instruments and/or "private
            activity" bonds. For shareholders subject to the federal
            alternative minimum tax ("AMT"), distributions derived from
            "private activity" bonds must be included in their AMT
            calculations, and as such a portion of the Fund's distribution may
            be subject to federal income tax. The Fund invests primarily in
            investment grade debt securities, but may invest up to 10% of its
            net assets in Municipal Bonds or "private activity" bonds which
            are high yield securities ("junk bonds") rated at least Ba by
            Moody's or BB by S&P, or, if unrated, determined by PIMCO to be of
            comparable quality. The Fund may invest more than 25% of its
            assets in bonds of issuers in California and New York. To the
            extent that the Fund concentrates its investments in California or
            New York, it will be subject to California or New York State
            Specific Risk. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. The average portfolio
            duration of this Fund normally varies within a three- to ten-year
            time frame based on PIMCO's forecast for interest rates.

             The Fund may purchase or write call and put options, futures and
            options, futures contracts, or swap agreements on U.S. Government
            Securities and Municipal Bonds, and invest in mortgage- or asset-
            backed securities. The Fund may seek to obtain market exposure to
            the securities in which it primarily invests by entering into a
            series of purchase and sale contracts or by using other investment
            techniques (such as buy backs or dollar rolls). The Fund may lend
            its portfolio securities to brokers, dealers and other financial
            institutions to earn income.

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

              . Interest Rate       . Derivatives Risk    . Management Risk
                Risk                . Mortgage Risk       . California State
              . Credit Risk         . Leveraging Risk       Specific Risk
              . Market Risk                               . New York State
              . Issuer Risk                                 Specific Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund in a bar chart and an Average Annual Total Returns table.
            The information provides some indication of the risks of investing
            in the Fund by showing changes in its performance from year to
            year and by showing how the Fund's average annual returns compare
            with the returns of a broad-based securities market index and an
            index of similar funds. The bar chart and the information to its
            right show performance of the Fund's Class A shares, but do not
            reflect the impact of sales charges (loads). If they did, the
            returns would be lower than those shown. Unlike the bar chart,
            performance for Class A, B and C shares in the Average Annual
            Total Returns table reflect the impact of sales charges. For
            periods prior to the inception date of Class A, B and C shares
            (4/1/98), performance information shown in the bar chart and table
            for those classes is based on the performance of the Fund's
            Institutional Class shares, which are offered in a different
            prospectus. The prior Institutional Class performance has been
            adjusted to reflect the actual sales charges (in the Average
            Annual Total Returns table only), distribution and/or service
            (12b-1) fees, administrative fees and other expenses paid by Class
            A, B and C shares. Past performance is no guarantee of future
            results.

7 Pacific Investment Management Series
<PAGE>

            PIMCO Municipal Bond Fund (continued)

            Calendar Year Total Returns -- Class A

                       [GRAPH]              Highest and Lowest Quarter Returns
                                            (for periods shown in the bar chart)
                      '98    '99            ------------------------------------
                     -----  ------          Highest (7/1/98-9/30/98)       3.23%
                     5.68%  -4.05%          ------------------------------------
                                            Lowest (4/1/99-6/30/99)       -2.45%

                  Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                           <C>        <C>
                                                                  Fund Inception
                                                       1 Year     (12/31/97)
            --------------------------------------------------------------------
         Class A                                       -6.93%     -0.82%
            --------------------------------------------------------------------
         Class B                                       -9.36%     -1.94%
            --------------------------------------------------------------------
         Class C                                       -5.44%      0.19%
            --------------------------------------------------------------------
         Lehman General Municipal Bond Index(/1/)      -2.07%      2.12%
            --------------------------------------------------------------------
         Lipper General Municipal Fund Average(/2/)    -4.63%      0.23%
            --------------------------------------------------------------------
</TABLE>

            (1) The Lehman General Municipal Bond Index is an unmanaged index
                of municipal bonds with an average duration of 7.68 years as
                of 12/31/99. It is not possible to invest directly in the
                index.
            (2) The Lipper General Municipal Debt Fund Average is a total
                return performance average of Funds tracked by Lipper
                Analytical Services, Inc. that invest at least 65% of their
                assets in municipal debt issues in the top four credit
                ratings. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A, B or C shares of the Fund:
of the
Fund        Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>      <C>                                              <C>
                  Maximum Sales Charge (Load) Imposed              Maximum Contingent Deferred Sales Charge (Load)
                  on Purchases (as a percentage of offering price) (as a percentage of original purchase price)
            ------------------------------------------------------------------------------------------------------
         Class A  3%                                               1%(/1/)
            ------------------------------------------------------------------------------------------------------
         Class B  None                                             5%(/2/)
            ------------------------------------------------------------------------------------------------------
         Class C  None                                             1%(/3/)
            ------------------------------------------------------------------------------------------------------
</TABLE>

            (1) Imposed only in certain circumstances where Class A shares are
                purchased without a front-end sales charge at the time of
                purchase.
            (2) The maximum CDSC is imposed on shares redeemed in the first
                year. For shares held longer than one year, the CDSC declines
                according to the schedule set forth under "Investment Options
                (Class A, B and C Shares--Contingent Deferred Sales Charges
                (CDSCs))--Class B Shares."
            (3) The CDSC on Class C shares is imposed only on shares redeemed
                in the first year.

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

<TABLE>
         <S>          <C>      <C>               <C>           <C>
                               Distribution                    Total Annual
                      Advisory and/or Service    Other         Fund Operating
         Share Class  Fees     (12b-1) Fees(/1/) Expenses(/2/) Expenses
            -----------------------------------------------------------------
         A Shares     0.25%    0.25%             0.36          0.86%
            -----------------------------------------------------------------
         B Shares     0.25     1.00              0.36          1.61
            -----------------------------------------------------------------
         C Shares     0.25     0.75              0.35          1.35
            -----------------------------------------------------------------
</TABLE>

            (1) Due to the 12b-1 distribution fee imposed on Class B and
                Class C shares, a Class B or Class C shareholder may,
                depending upon the length of time the shares are held, pay
                more than the economic equivalent of the maximum front-end
                sales charges permitted by relevant rules of the National
                Association of Securities Dealers, Inc.
            (2) Other expenses reflect a 0.35% Administration Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Classes A, B or C of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and the Fund'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 shares  Example: Assuming you do not redeem
                      at the end of each period            your shares
         <S>          <C>      <C>      <C>      <C>       <C>      <C>      <C>      <C>
         Share Class  Year 1   Year 3   Year 5   Year 10   Year 1   Year 3   Year 5   Year 10
            ----------------------------------------------------------------------------------
         Class A      $385     $566      $762    $   1,329 $385     $566     $762     $1,329
            ----------------------------------------------------------------------------------
         Class B       664      808     1,076     1,612     164      508      876     1,612
            ----------------------------------------------------------------------------------
         Class C       237      428       739     1,624     137      428      739     1,624
            ----------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               8
<PAGE>

            PIMCO New York Intermediate Municipal Bond Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective    Fund Focus          Credit Quality
Investments   Seeks high current      Intermediate        B to Aaa; maximum
and           income exempt from      maturity            10% below Baa
Strategies    federal and New York    municipal
              income tax. Capital     securities          Dividend Frequency
              appreciation is a       (exempt from        Declared daily and
              secondary objective.    federal and New     distributed monthly
                                      York income tax)
              Fund Category
              Tax Exempt Bond         Average Portfolio
                                      Duration
                                      3-7 years

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 80% of its net assets in
            Municipal Bonds whose interest is, in the opinion of bond counsel
            for the issuer at the time of issuance, exempt from federal income
            tax. The Fund will invest under normal circumstances at least 65%
            of its assets in debt securities whose interest is, in the opinion
            of bond counsel for the issuer at the time of issuance, exempt
            from regular federal income tax and New York income tax ("New York
            Municipal Bonds"). New York Municipal Bonds generally are issued
            by or on behalf of the State of New York and its political
            subdivisions, financing authorities and their agencies.

             The Fund may invest without limit in "private activity" bonds
            whose interest is a tax-preference item for purposes of the
            federal alternative minimum tax ("AMT"). For shareholders subject
            to the AMT, a substantial portion of the Fund's distributions may
            not be exempt from federal income tax. The Fund may invest up to
            20% of its net assets in other types of Fixed Income Instruments.
            The average portfolio duration of this Fund normally varies within
            a three-to seven-year time frame, based on PIMCO's forecast for
            interest rates. The Fund will seek income that is high relative to
            prevailing rates from Municipal Bonds. Capital appreciation, if
            any, generally arises from decreases in interest rates or
            improving credit fundamentals for a particular state, municipality
            or issuer.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality.

             The Fund may seek to obtain market exposure to the securities in
            which it primarily invests by entering into a series of purchase
            and sale contracts or by using other investment techniques (such
            as buy backs or dollar rolls). The Fund may invest in derivative
            instruments, such as options, futures contracts or swap
            agreements, or in mortgage- or asset-backed securities. The Fund
            may lend its portfolio securities to brokers, dealers and other
            financial institutions to earn income.

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

              .Interest Rate Risk    .Issuer Risk           .Mortgage Risk
              .Credit Risk           .Issuer Non-Diversifi- .Leveraging Risk
              .New York State         cation Risk           .Management Risk
               Specific Risk         .Liquidity Risk
              .Market Risk           .Derivatives Risk

            Please see "Summary of Principal Risks" following the Fund
            Summaries for a description of these and other risks of investing
            in the Fund.

- --------------------------------------------------------------------------------
Performance The Fund does not have a full calendar year of performance. Thus,
Information no bar chart or annual returns table is included for the Fund.

  Pacific Investment Management Series
9
<PAGE>


            PIMCO New York Intermediate Municipal Bond Fund (continued)

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A shares of the Fund:
of the
Fund

            Shareholder fees (fees paid directly from your investment)

<TABLE>
         <S>                  <C>
                              Maximum Sales Charge (Load) Imposed
                              on Purchases (as a percentage of offering price)
            -----------------------------------------------------------
         Class A              3%
            -----------------------------------------------------------
</TABLE>

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

<TABLE>
         <S>          <C>      <C>            <C>           <C>
                               Distribution                 Total Annual
                      Advisory and/or Service Other         Fund Operating
         Share Class  Fees     (12b-1) Fees   Expenses(/1/) Expenses
            --------------------------------------------------------------
         Class A      0.25%    0.25%          0.35%         0.85%
            --------------------------------------------------------------
</TABLE>

            (1) Other expenses reflect a 0.35% Administration Fee paid by the
                class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in the noted class of shares for the time periods
            indicated, your investment has a 5% return each year, the
            reinvestment of all dividends and distributions, and that the
            Fund'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 do not
                       Example: Assuming you redeem shares at the end of each period    redeem your shares
         <S>           <C>             <C>             <C>              <C>             <C>    <C>    <C>  <C>
         Share Class   Year 1          Year 3          Year 5           Year 10         Year 1 Year 3 Year 5 Year 10
            --------------------------------------------------------------------------------------------------------
         Class A       $384            $563            $757             $1,318          $384   $563   $757    $1,318
            --------------------------------------------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                              10
<PAGE>

            Summary of Principal Risks

            The value of your investment in a Fund changes with the values of
            that Fund's investments. Many factors can affect those values. The
            factors that are most likely to have a material effect on a
            particular Fund's portfolio as a whole are called "principal
            risks." The principal risks of each Fund are identified in the
            Fund Summaries and are described in this section. Each Fund may be
            subject to additional principal risks and risks other than those
            described below because the types of investments made by a Fund
            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 Funds, their
            investments and the related risks. There is no guarantee that a
            Fund will be able to achieve its investment objective.

Interest    As interest rates rise, the value of fixed income securities held
Rate Risk   by a Fund 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.

Credit      A Fund could lose money if the issuer or guarantor of a fixed
Risk        income security, or the counterparty to a derivatives contract,
            repurchase agreement or a 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.

Market      The market price of securities owned by a Fund may go up or down,
Risk        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. Equity securities
            generally have greater price volatility than fixed income
            securities.

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

Liquidity   Liquidity risk exists when particular investments are difficult to
Risk        purchase or sell. A Fund's investments in illiquid securities may
            reduce the returns of the Fund because it may be unable to sell
            the illiquid securities at an advantageous time or price. Funds
            with principal investment strategies that involve derivatives or
            securities with substantial market and/or credit risk tend to have
            the greatest exposure to liquidity risk.

Derivatives Derivatives are financial contracts whose value depends on, or is
Risk        derived from, the value of an underlying asset, reference rate or
            index. The various derivative instruments that the Funds 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 and
            Policies" in the Statement of Additional Information. The Funds
            typically use derivatives as a substitute for taking a position in
            the underlying asset and/or as part of a strategy designed to
            reduce exposure to other risks, such as interest rate risk. The
            Funds may also use derivatives for leverage in which case their
            use would involve leveraging risk. A Fund's use of derivative
            instruments involves risks different from, or possibly 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 fund 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 Fund will engage in these
            transactions to reduce exposure to other risks when that would be
            beneficial.

11 Pacific Investment Management Series
<PAGE>

Mortgage    A Fund that purchases mortgage-related securities is subject to
Risk        certain additional risks. Rising interest rates tend to extend the
            duration of mortgage-related securities, making them more
            sensitive to changes in interest rates. As a result, in a period
            of rising interest rates, a Fund that holds 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 a Fund because the Fund
            will have to reinvest that money at the lower prevailing interest
            rates.

Issuer      Focusing investments in a small number of issuers, industries or
Non-        foreign currencies increases risk. Funds that are "non-
Diversifi-  diversified" may invest a greater percentage of its assets in the
cation      securities of a single issuer (such as bonds issued by a
Risk        particular state) than Funds that are "diversified." Funds 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. Similarly, a Fund may be more sensitive to adverse
            economic, business or political developments if it invests a
            substantial portion of its assets in the bonds of similar projects
            or from issuers in a similar state.

Leveraging  Certain transactions may give rise to a form of leverage. Such
Risk        transactions may include, among, others, reverse repurchase
            agreements, loans of portfolios securities, and the use 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 Fund 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, may
            cause a Fund to be more volatile than if the Fund had not been
            leveraged. This is because leverage tends to exaggerate the effect
            of any increase or decrease in the value of a Fund's portfolio
            securities.

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

California  A Fund that concentrates its investments in California municipal
State       bonds, may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of California issuers
Risk        to pay interest or repay principal. Provisions of the California
            Constitution and State statutes which limit the taxing and
            spending authority of California governmental entities may impair
            the ability of California issuers to pay principal and/or interest
            on their obligations. While California's economy is broad, it does
            have major concentrations in high technology, aerospace and
            defense-related manufacturing, trade, entertainment, real estate
            and financial services, and may be sensitive to economic problems
            affecting those industries. Future California political and
            economic developments, constitutional amendments, legislative
            measures, executive orders, administrative regulations, litigation
            and voter initiatives could have an adverse effect on the debt
            obligations of California issuers.

New York    A Fund that concentrates its investments in New York municipal
State       bonds may be affected significantly by economic, regulatory or
Specific    political developments affecting the ability of New York issuers
Risk        to pay interest or repay principal. Certain issuers of New York
            municipal bonds have experienced serious financial difficulties in
            recent years. A reoccurrence of these difficulties may impair the
            ability of certain New York issuers to pay principal or interest
            on their obligations. The financial health of New York City
            affects that of the State, and when New York City experiences
            financial difficulty it may have an adverse affect on New York
            municipal bonds held by the Fund. The growth rate of New York has
            recently been somewhat slower than the nation overall. The
            economic and financial condition of New York also may be affected
            by various financial, social, economic and political factors.

                                                                   Prospectus 12
<PAGE>

            Management of the Funds

Investment  PIMCO serves as the investment adviser and the administrator
Adviser     (serving in its capacity as administrator, the "Administrator")
and         for the Funds. Subject to the supervision of the Board of
Admini-     Trustees, PIMCO is responsible for managing the investment
strator     activities of the Funds and the Funds' business affairs and other
            administrative matters.

             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.

Advisory    Each Fund pays PIMCO fees in return for providing investment
Fees        advisory services. The California Intermediate Municipal Bond and
            New York Intermediate Municipal Bond Funds were not operational
            during the fiscal year ended March 31, 1999. The investment
            advisory fees are set at the annual rate (stated as a percentage
            of the average daily net assets of each Fund) of 0.25%.

Admini-     Each Fund pays for the administrative services it requires under a
strative    fee structure which is essentially fixed. Class A, Class B and
Fees        Class C shareholders of a Fund pay an administrative fee to PIMCO,
            computed as a percentage of the Fund's assets attributable in the
            aggregate to that class of shares. PIMCO, in turn, provides or
            procures administrative services for Class A, Class B and Class C
            shareholders and also bears the costs of various third-party
            services required by the Funds, including audit, custodial,
            portfolio accounting, legal transfer agency and printing costs.
            The result of this fee structure is an expense level for Class A,
            Class B and Class C shareholders of each Fund that, with limited
            exceptions, is precise and predictable under ordinary
            circumstances.

             The California Intermediate Municipal Bond and New York
            Intermediate Municipal Bond Funds were not operational during the
            fiscal year ended March 31, 1999. The administrative fees for each
            Fund are set at the annual rates (stated as a percentage of the
            average daily net assets attributable in the aggregate to a Fund's
            Class A, Class B, and Class C shares) of 0.35%.

Individual  The following individual has primary responsibility for managing
Portfolio   each of the noted Funds.
Manager


<TABLE>
<CAPTION>
         Portfolio
         Manager        Since                          Recent Professional Experience
            ---------------------------------------------------------------------------------------------------------------
         <C>            <C>                           <S>
         Mark V. McCray 4/00                           Senior Vice-President, PIMCO. He joined PIMCO as a Portfolio Manager in
                                                       2000. Prior to that, he was a bond trader from 1992-1999 at Goldman Sachs
                                                       & Co. where he was appointed Vice President in 1996 and named co-head of
                                                       municipal bond trading in 1997 with responsibility for the firm's
                                                       proprietary account and supervised municipal bond traders.
</TABLE>


Distributor The Trust's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors L.P. The Distributor, located
            at 2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
            registered with the Securities and Exchange Commission.

13 Pacific Investment Management Series
<PAGE>

            Investment Options--Class A, B and C Shares

            The Trust offers investors Class A, Class B and Class C shares of
            the Municipal Bond Fund and Class A shares of the California
            Intermediate Municipal Bond and New York Intermediate Municipal
            Bond Funds in this Prospectus. Each class of shares is subject to
            different types and levels of sales charges than the other classes
            and bears a different level of expenses.

             The class of shares that is best for you depends upon a number of
            factors, including the amount and the intended length of your
            investment. The following summarizes key information about each
            class to help you make your investment decision, including the
            various expenses associated with each class. More extensive
            information about the Trust's multi-class arrangements is included
            in the PIMCO Funds Shareholders Guide for Class A, B and C Shares
            (the "Guide"), which is included as part of the Statement of
            Additional Information and can be obtained free of charge from the
            Distributor. See "How to Buy and Sell Shares--PIMCO Funds
            Shareholders Guide" below.

Class A     .  You pay an initial sales charge when you buy Class A shares of
Shares         any Fund. The maximum initial sales charge is 3.00% for each of
               the Funds. The sales charge is deducted from your investment so
               that not all of your purchase payment is invested.

            .  You may be eligible for a reduction or a complete waiver of the
               initial sales charge under a number of circumstances. For
               example, you normally pay no sales charge if you purchase
               $1,000,000 or more of Class A shares. Please see the Guide for
               details.

            .  Class A shares are subject to lower 12b-1 fees than Class B or
               Class C shares. Therefore, Class A shareholders generally pay
               lower annual expenses and receive higher dividends than Class B
               or Class C shareholders.

            .  You normally pay no contingent deferred sales charge ("CDSC")
               when you redeem Class A shares of the Municipal Bond Fund,
               although you may pay a 1% CDSC if you purchase $1,000,000 or
               more of Class A shares (and therefore pay no initial sales
               charge) and then redeem the shares during the first 18 months
               after your initial purchase. The Class A CDSC is waived for
               certain categories of investors and does not apply if you are
               otherwise eligible to purchase Class A shares without a sales
               charge. Please see the Guide for details.

Class B     .  You do not pay an initial sales charge when you buy Class B
Shares         shares. The full amount of your purchase payment is invested
               initially.

            .  You normally pay a CDSC of up to 5% if you redeem Class B
               shares during the first six years after your initial purchase.
               The amount of the CDSC declines the longer you hold your Class
               B shares. You pay no CDSC if you redeem during the seventh year
               and thereafter. The Class B CDSC is waived for certain
               categories of investors. Please see the Guide for details.

            .  Class B shares are subject to higher 12b-1 fees than Class A
               shares for the first seven years they are held. During this
               time, Class B shareholders normally pay higher annual expenses
               and receive lower dividends than Class A shareholders.

            .  Class B shares automatically convert into Class A shares after
               they have been held for seven years. After the conversion takes
               place, the shares are subject to the lower 12b-1 fees paid by
               Class A shares.

Class C     .  You do not pay an initial sales charge when you buy Class C
Shares         shares. The full amount of your purchase payment is invested
               initially.

            .  You normally pay a CDSC of 1% if you redeem Class C shares
               during the first year after your initial purchase. The Class C
               CDSC is waived for certain categories of investors. Please see
               the Guide for details.

            .  Class C shares are subject to higher 12b-1 fees than Class A
               shares. Therefore, Class C shareholders normally pay higher
               annual expenses and receive lower dividends than Class A
               shareholders.

            .  Class C shares do not convert into any other class of shares.
               Because Class B shares convert into Class A shares after seven
               years, Class C shares will normally be subject to higher
               expenses and will pay lower dividends than Class B shares if
               the shares are held for more than seven years.
                                                                   Prospectus
                                                                              14
<PAGE>

            The following provides additional information about the sales
            charges and other expenses associated with Class A, Class B and
            Class C shares.

- --------------------------------------------------------------------------------
Initial     Unless you are eligible for a waiver, the public offering price
Sales       you pay when you buy Class A shares of the Funds is the net asset
Charges--   value ("NAV") of the shares plus an initial sales charge. The
Class A     initial sales charge varies depending upon the size of your
Shares      purchase, as set forth below. No sales charge is imposed where
            Class A shares are issued to you pursuant to the automatic
            reinvestment of income dividends or capital gains distributions.

- --------------------------------------------------------------------------------
Municipal
Bond Fund
<TABLE>
         <S>                     <C>                       <C>
                                 Initial Sales Charge      Initial Sales Charge
         Amount of               as % of Net               as % of Public
         Purchase                Amount Invested           Offering Price
            -------------------------------------------------------------------
         $0-$49,999              3.09%                     3.00%
            -------------------------------------------------------------------
         $50,000-$99,999         2.56%                     2.50%
            -------------------------------------------------------------------
         $100,000-$249,999       2.04%                     2.00%
            -------------------------------------------------------------------
         $250,000-$499,999       1.52%                     1.50%
            -------------------------------------------------------------------
         $500,000-$999,999       1.27%                     1.25%
            -------------------------------------------------------------------
         $1,000,000 +            0.00%*                    0.00%*
            -------------------------------------------------------------------

            *As shown, investors that purchase $1,000,000 or more of any
            Fund's Class A shares will not pay any initial sales charge on the
            purchase. However, purchasers of $1,000,000 or more of Class A
            shares may be subject to a CDSC of 1% if the shares are redeemed
            during the first 18 months after their purchase. See "CDSCs on
            Class A Shares" below.

- -------------------------------------------------------------------------------
California
and New
York
Intermediate
Municipal
Bond
Funds
                                 Initial Sales Charge      Initial Sales Charge
         Amount of               as % of Net               as % of Public
         Purchase                Amount Invested           Offering Price
            -------------------------------------------------------------------
         $0-$49,999              3.09%                     3.00%
            -------------------------------------------------------------------
         $50,000-$99,999         2.04%                     2.00%
            -------------------------------------------------------------------
         $100,000-$249,999       2.01%                     1.00%
            -------------------------------------------------------------------
         $250,000-$499,999       0.00%                     0.00%
            -------------------------------------------------------------------

- -------------------------------------------------------------------------------
Contingent  Unless you are eligible for a waiver, if you sell (redeem) your
Deferred    Class B or Class C shares of the Municipal Bond Fund within the
Sales       time periods specified below, you will pay a CDSC according to the
Charges     following schedules.
(CDSCs)--
Class B
and Class
C Shares

- -------------------------------------------------------------------------------
Class B
Shares   Years Since Purchase    Percentage Contingent
         Payment was Made        Deferred Sales Charge
            -------------------------------------------------------------------
         First                   5
            -------------------------------------------------------------------
         Second                  4
            -------------------------------------------------------------------
         Third                   3
            -------------------------------------------------------------------
         Fourth                  3
            -------------------------------------------------------------------
         Fifth                   2
            -------------------------------------------------------------------
         Sixth                   1
            -------------------------------------------------------------------
         Seventh                 0*
            -------------------------------------------------------------------

            *After the seventh year, Class B shares convert into Class A
            shares.

- -------------------------------------------------------------------------------
Class C
Shares   Years Since Purchase    Percentage Contingent
         Payment was Made        Deferred Sales Charge
            -------------------------------------------------------------------
         First                   1
            -------------------------------------------------------------------
         Thereafter              0
            -------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
CDSCs on    Unless a waiver applies, investors who purchase $1,000,000 or more
Class A     of Class A shares of the Municipal Bond Fund (and, thus, pay no
Shares      initial sales charge) will be subject to a 1% CDSC if the shares
            are redeemed within 18 months of their purchase. The Class A CDSC
            does not apply if you are otherwise eligible to purchase Class A
            shares without an initial sales charge or are eligible for a
            waiver of the CDSC. See "Reductions and Waivers of Initial Sales
            Charges and CDSCs" below.

  Pacific Investment Management Series
15
<PAGE>

- --------------------------------------------------------------------------------
How CDSCs   A CDSC is imposed on redemptions of Class B and Class C shares of
are         the Municipal Bond Fund (and where applicable, Class A shares) on
Calculated  the amount of the redemption which causes the current value of
            your account for the particular class of shares of a Fund to fall
            below the total dollar amount of your purchase payments subject to
            the CDSC. However, no CDSC is imposed if the shares redeemed have
            been acquired through the reinvestment of dividends or capital
            gains distributions or if the amount redeemed is derived from
            increases in the value of your account above the amount of the
            purchase payments subject to the CDSC. CDSCs are deducted from the
            proceeds of your redemption, not from amounts remaining in your
            account. In determining whether a CDSC is payable, it is assumed
            that the purchase payment from which the redemption is made is the
            earliest purchase payment for the particular class of shares in
            your account (from which a redemption or exchange has not already
            been effected).

             For instance, the following example illustrates the operation of
            the Class B CDSC:

              .  Assume that an individual opens an account and makes a
                 purchase payment of $10,000 for Class B shares of a Fund and
                 that six months later the value of the investor's account for
                 that Fund has grown through investment performance and
                 reinvestment of distributions to $11,000. The investor then
                 may redeem up to $1,000 from that Fund ($11,000 minus
                 $10,000) without incurring a CDSC. If the investor should
                 redeem $3,000, a CDSC would be imposed on $2,000 of the
                 redemption (the amount by which the investor's account for
                 the Fund was reduced below the amount of the purchase
                 payment). At the rate of 5%, the Class B CDSC would be $100.

             In determining whether an amount is available for redemption
            without incurring a CDSC, the purchase payments made for all
            shares of a particular class of a Fund in the shareholder's
            account are aggregated, and the current value of all such shares
            is aggregated.

- --------------------------------------------------------------------------------
Reductions  The initial sales charges on Class A shares and the CDSCs on Class
and         A, Class B and Class C shares may be reduced or waived under
Waivers     certain purchase arrangements and for certain categories of
of          investors. Please see the Guide for details. The Guide is
Initial     available free of charge from the Distributor. See "How to Buy and
Sales       Sell Shares--PIMCO Funds Shareholders Guide" below.
Charges
and CDSCs

- --------------------------------------------------------------------------------
Distribu-   The Funds pay fees to the Distributor on an ongoing basis as
tion and    compensation for the services the Distributor renders and the
Servicing   expenses it bears in connection with the sale and distribution of
(12b-1)     Fund shares ("distribution fees") and/or in connection with
Plans       personal services rendered to Fund shareholders and the
            maintenance of shareholder accounts ("servicing fees"). These
            payments are made pursuant to Distribution and Servicing Plans
            ("12b-1 Plans") adopted by each Fund pursuant to Rule 12b-1 under
            the Investment Company Act of 1940.

             There is a separate 12b-1 Plan for each class of shares offered
            in this Prospectus. Class A shares pay only servicing fees. Class
            B and Class C shares pay both distribution and servicing fees. The
            following lists the maximum annual rates at which the distribution
            and/or servicing fees may be paid under each 12b-1 Plan
            (calculated as a percentage of each Fund's average daily net
            assets attributable to the particular class of shares):

<TABLE>
         <S>                               <C>                                 <C>
                                           Servicing                           Distribution
         Class A                           Fee                                 Fee
            -------------------------------------------------------------------------------
         All Funds                         0.25%                               0.00%
            -------------------------------------------------------------------------------
         Class B
            -------------------------------------------------------------------------------
         Municipal Bond Fund               0.25%                               0.75%
            -------------------------------------------------------------------------------
         Class C
            -------------------------------------------------------------------------------
         Municipal Bond Fund               0.25%                               0.50%
            -------------------------------------------------------------------------------
</TABLE>

             Because 12b-1 fees are paid out of a Fund's assets on an ongoing
            basis, over time these fees will increase the cost of your
            investment and may cost you more than sales charges which are
            deducted at the time of investment. Therefore, although Class B
            and Class C shares do not pay initial sales charges, the
            distribution fees payable on Class B and Class C shares may, over
            time, cost you more than the initial sales charge imposed on Class
            A shares. Also, because Class B shares convert into Class A shares
            after they have been held for seven years and are not subject to
            distribution fees after the conversion, an investment in Class C
            shares may cost you more over time than an investment in Class B
            shares.
                                                                   Prospectus
                                                                              16
<PAGE>

            How Fund Shares Are Priced

            The net asset value ("NAV") of a Fund's Class A, Class B and Class
            C shares is determined by dividing the total value of a Fund's
            portfolio investments and other assets attributable to that class,
            less any liabilities, by the total number of shares outstanding of
            that class.

             For purposes of calculating NAV, 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.

             Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time) (the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Funds normally use pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Funds or its agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Funds 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 the NYSE
            Close.

            How to Buy and Sell Shares

            The following section provides basic information about how to buy,
            sell (redeem) and exchange shares of the Funds.

PIMCO       More detailed information about the Trust's purchase, sale and
Funds       exchange arrangements for Fund shares is provided in the PIMCO
Share-      Funds Shareholders Guide, which is included in the Statement of
holders     Additional Information and can be obtained free of charge from the
Guide       Distributor by written request or by calling 1-800-426-0107. The
            Guide provides technical information about the basic arrangements
            described below and also describes special purchase, sale and
            exchange features and programs offered by the Trust, including:

              .  Automated telephone and wire transfer procedures
              .  Automatic purchase, exchange and withdrawal programs
              .  Programs that establish a link from your Fund account to your
                 bank account
              .  Special arrangements for tax-qualified retirement plans
              .  Investment programs which allow you to reduce or eliminate
                 the initial sales charges on Class A shares

Calculation When you buy shares of the Funds, you pay a price equal to the NAV
of Share    of the shares, plus any applicable sales charge. When you sell
Price and   (redeem) shares, you receive an amount equal to the NAV of the
Redemption  shares, minus any applicable CDSC. NAVs are determined at the
Payments    close of regular trading (normally, 4:00 p.m. Eastern time) on
            each day the New York Stock Exchange is open. See "How Fund Shares
            Are Priced" above for details. Generally, purchase and redemption
            orders for Fund shares are processed at the NAV next calculated
            after your order is received by the Distributor. There are certain
            exceptions where an order is received by a broker or dealer prior
            to the close of regular trading on the New York Stock Exchange and
            then transmitted to the Distributor after the NAV has been
            calculated for that day (in which case the order may be processed
            according to that day's NAV). Please see the Guide for details.

             The Trust does not calculate NAVs or process orders on days when
            the New York Stock Exchange is closed. If your purchase or
            redemption order is received by the Distributor on a day when the
            New York Stock Exchange is closed, it will be processed on the
            next succeeding day when the New York Stock Exchange is open
            (according to the succeeding day's NAV).

  Pacific Investment Management Series
17
<PAGE>

Buying      You can buy Class A, Class B or Class C shares of the Funds in the
Shares      following ways:

              .  Through your broker, dealer or other financial intermediary.
                 Your broker, dealer or other intermediary may establish
                 higher minimum investment requirements than the Trust and may
                 also independently charge you transaction fees and additional
                 amounts (which may vary) in return for its services, which
                 will reduce your return. Shares you purchase through your
                 broker, dealer or other intermediary will normally be held in
                 your account with that firm.

              .  Directly from the Trust. To make direct investments, you must
                 open an account with the Distributor and send payment for
                 your shares either by mail or through a variety of other
                 purchase options and plans offered by the Trust.

             If you wish to invest directly by mail, please send a check
            payable to PIMCO Funds Distributors LLC, along with a completed
            application form to:

                PIMCO Funds Distributors LLC
                P.O. Box 9688
                Providence, RI 02940-0926

             The Trust accepts all purchases by mail subject to collection of
            checks at full value and conversion into federal funds. You may
            make subsequent purchases by mailing a check to the address above
            with a letter describing the investment or with the additional
            investment portion of a confirmation statement. Checks for
            subsequent purchases should be payable to PIMCO Funds Distributors
            LLC and should clearly indicate your account number. Please call
            the Distributor at 1-800-426-0107 if you have any questions
            regarding purchases by mail.

             The Guide describes a number of additional ways you can make
            direct investments, including through the PIMCO Funds Auto-Invest
            and PIMCO Funds Fund Link programs. You can obtain a Guide free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107. See "PIMCO Funds Shareholders Guide" above.

             The Distributor, in its sole discretion, may accept or reject any
            order for purchase of Fund shares. No share certificates will be
            issued unless specifically requested in writing.

             Investment Minimums. The following investment minimums apply for
            purchases of Class A, Class B and Class C shares.

<TABLE>
<CAPTION>
                     Initial Investment                 Subsequent Investments
                     ------------------                 ----------------------
                     <S>                                <C>
                     $2,500 per Fund                        $100 per Fund
</TABLE>

             Lower minimums may apply for certain categories of investors,
            including certain tax-qualified retirement plans, and for special
            investment programs and plans offered by the Trust, such as the
            PIMCO Funds Auto-Invest and PIMCO Funds Fund Link programs. Please
            see the Guide for details.

Small       Because of the disproportionately high costs of servicing accounts
Account     with low balances, if you have a direct account with the
Fee         Distributor, you will be charged a fee at the annual rate of $16
            if your account balance for any Fund falls below a minimum level
            of $2,500. However, you will not be charged this fee if the
            aggregate value of all of your PIMCO Funds accounts is at least
            $50,000. Any applicable small account fee will be deducted
            automatically from your below-minimum Fund account in quarterly
            installments and paid to the Administrator. Each Fund account will
            normally be valued, and any deduction taken, during the last five
            business days of each calendar quarter. Lower minimum balance
            requirements and waivers of the small account fee apply for
            certain categories of investors. Please see the Guide for details.

Minimum     Due to the relatively high cost to the Funds of maintaining small
Account     accounts, you are asked to maintain an account balance in each
Size        Fund in which you invest of at least the minimum investment
            necessary to open the particular type of account. If your balance
            for any Fund remains below the minimum for three months or longer,
            the Administrator has the right (except in the case of employer-
            sponsored retirement accounts) to redeem your remaining shares and
            close that Fund account after giving you 60 days to increase your
            balance. Your Fund account will not be liquidated if the reduction
            in size is due solely to a decline in market value of your Fund
            shares or if the aggregate value of all your PIMCO Funds accounts
            exceeds $50,000.

Exchanging  You may exchange your Class A, Class B or Class C shares of any
Shares      Fund for the same Class of shares of any other Fund or of a series
            of PIMCO Funds: Pacific Investment Management Series or PIMCO
            Funds: Multi-Manager Series. Shares are exchanged on the basis of
            their respective NAVs next
                                                                   Prospectus
                                                                              18
<PAGE>

            calculated after your exchange order is received by the
            Distributor. Currently, the Trust does not charge any exchange
            fees or charges. Exchanges are subject to the $2,500 minimum
            initial purchase requirements for each Fund, except with respect
            to tax-qualified programs and exchanges effected through the PIMCO
            Funds Auto-Exchange plan. If you maintain your account with the
            Distributor, you may exchange shares by completing a written
            exchange request and sending it to PIMCO Funds Distributors LLC,
            P.O. Box 9688, Providence, RI 02940-0926. You can get an exchange
            form by calling the Distributor at 1-800-426-0107.

             The Trust reserves the right to refuse exchange purchase if, in
            the judgment of PIMCO, the purchase would adversely affect a Fund
            and its shareholders. In particular, a pattern of exchanges
            characteristic of "market-timing" strategies may be deemed by
            PIMCO to be detrimental to the Trust or a particular Fund.
            Currently, the Trust limits the number of "round trip" exchanges
            an investor may make. An investor makes a "round trip" exchange
            when the investor purchases shares of a particular Fund,
            subsequently exchanges those shares for shares of a different
            PIMCO Fund and then exchanges back into the originally purchased
            Fund. The Trust has the right to refuse any exchange for any
            investor who completes (by making the exchange back into the
            shares of the originally purchased Fund) more than six round trip
            exchanges in any twelve-month period. Although the Trust has no
            current intention of terminating or modifying the exchange
            privilege other than as set forth in the preceding sentence, it
            reserves the right to do so at any time. Except as otherwise
            permitted by the Securities and Exchange Commission, the Trust
            will give you 60 days' advance notice if it exercises its right to
            terminate or materially modify the exchange privilege. The Guide
            provides more detailed information about the exchange privilege,
            including the procedures you must follow and additional exchange
            options. You can obtain a Guide free of charge from the
            Distributor by written request or by calling 1-800-426-0107. See
            "PIMCO Funds Shareholders' Guide" above.

Selling     You can sell (redeem) Class A, Class B or Class C shares of the
Shares      Funds in the following ways:

              . Through your broker, dealer or other financial intermediary.
             Your broker, dealer or other intermediary may independently
            charge you transaction fees and additional amounts in return for
            its services, which will reduce your return.

              . Directly from the Trust by Written Request. To redeem shares
            directly from the Trust by written request (whether or not the
            shares are represented by certificates), you must send the
            following items to the Trust's Transfer Agent, PFPC Inc., P.O. Box
            9688, Providence, RI 02940-9688:

              (1) a written request for redemption signed by all registered
              owners exactly as the account is registered on the Transfer
              Agent's records, including fiduciary titles, if any, and
              specifying the account number and the dollar amount or number of
              shares to be redeemed;

              (2) for certain redemptions described below, a guarantee of all
              signatures on the written request or on the share certificate or
              accompanying stock power, if required, as described under
              "Signature Guarantee" below;

              (3) any share certificates issued for any of the shares to be
              redeemed (see "Certificated Shares" below); and

              (4) any additional documents which may be required by the
              Transfer Agent for redemption by corporations, partnerships or
              other organizations, executors, administrators, trustees,
              custodians or guardians, or if the redemption is requested by
              anyone other than the shareholder(s) of record. Transfers of
              shares are subject to the same requirements.


            A signature guarantee is not required for redemptions, requested
            by and payable to all shareholders of record for the account, and
            to be sent to the address of record for that account. To avoid
            delay in redemption or transfer, if you have any questions about
            these requirements you should contact the Transfer Agent in
            writing or call 1-800-426-0107 before submitting a request.
            Written redemption or transfer requests will not be honored until
            all required documents in the proper form have been received by
            the Transfer Agent. You cannot redeem your shares by written
            request if they are held in broker "street name" accounts--you
            must redeem through your broker.

             If the proceeds of your redemption (i) are to be paid to a person
            other than the record owner, (ii) are to be sent to an address
            other than the address of the account on the Transfer Agent's
            records, and/or (iii) are to be paid to a corporation,
            partnership, trust or fiduciary, the signature(s) on the
            redemption request and on the certificates, if any, or stock power
            must be guaranteed as described under "Signature Guarantee" below.
            The Distributor may, however, waive the signature guarantee

  Pacific Investment Management Series
19
<PAGE>

            requirement for redemptions up to $2,500 by a trustee of a
            qualified retirement plan, the administrator for which has an
            agreement with the Distributor.

             The Guide describes a number of additional ways you can redeem
            your shares, including:

                . Telephone requests to the Transfer Agent
                . PIMCO Funds Automated Telephone System (ATS)
                . Expedited wire transfers
                . Automatic Withdrawal Plan
                . PIMCO Funds Fund Link

             Unless you specifically elect otherwise, your initial account
            application permits you to redeem shares by telephone subject to
            certain requirements. To be eligible for ATS, expedited wire
            transfer, Automatic Withdrawal Plan, and Fund Link privileges, you
            must specifically elect the particular option on your account
            application and satisfy certain other requirements. The Guide
            describes each of these options and provides additional
            information about selling shares. You can obtain an Guide free of
            charge from the Distributor by written request or by calling 1-
            800-426-0107.

             Other than an applicable CDSC, you will not pay any special fees
            or charges to the Trust or the Distributor when you sell your
            shares. However, if you sell your shares through your broker,
            dealer or other financial intermediary, that firm may charge you a
            commission or other fee for processing your redemption request.

             Redemptions of Fund shares may be suspended when trading on the
            New York Stock Exchange is restricted or during an emergency which
            makes it impracticable for the Funds to dispose of their
            securities or to determine fairly the value of their net assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors. Under these
            and other unusual circumstances, the Trust may suspend redemptions
            or postpone payment for more than seven days, as permitted by law.

Timing of   Redemption proceeds will normally be mailed to the redeeming
Redemption  shareholder within seven calendar days or, in the case of wire
Payments    transfer or Fund Link redemptions, sent to the designated bank
            account within one business day. Fund Link redemptions may be
            received by the bank on the second or third business day. In cases
            where shares have recently been purchased by personal check,
            redemption proceeds may be withheld until the check has been
            collected, which may take up to 15 days. To avoid such
            withholding, investors should purchase shares by certified or bank
            check or by wire transfer.

Redemptions The Trust will redeem shares of each Fund solely in cash up to the
In Kind     lesser of $250,000 or 1% of the Fund's net assets during any 90-
            day period for any one shareholder. In consideration of the best
            interests of the remaining shareholders, the Trust may pay any
            redemption proceeds exceeding this amount in whole or in part by a
            distribution in kind of securities held by a Fund in lieu of cash.
            It is highly unlikely that your shares would ever be redeemed in
            kind. If your shares are redeemed in kind, you should expect to
            incur transaction costs upon the disposition of the securities
            received in the distribution.

Certif-     If you are redeeming shares for which certificates have been
icated      issued, the certificates must be mailed to or deposited with the
Shares      Trust, duly endorsed or accompanied by a duly endorsed stock power
            or by a written request for redemption. Signatures must be
            guaranteed as described under "Signature Guarantee" below. The
            Trust may request further documentation from institutions or
            fiduciary accounts, such as corporations, custodians (e.g., under
            the Uniform Gifts to Minors Act), executors, administrators,
            trustees or guardians. Your redemption request and stock power
            must be signed exactly as the account is registered, including
            indication of any special capacity of the registered owner.

Signature   When a signature guarantee is called for, you should have
Guarantee   "Signature Guaranteed" stamped under your signature and guaranteed
            by any of the following entities: U.S. banks, foreign banks having
            a U.S. correspondent bank, credit unions, savings associations,
            U.S. registered dealers and brokers, municipal securities dealers
            and brokers, government securities dealers and brokers, national
            securities exchanges, registered securities associations and
            clearing agencies (each an "Eligible Guarantor Institution"). The
            Distributor reserves the right to reject any signature guarantee
            pursuant to its written signature guarantee standards or
            procedures, which may be revised in the future to permit it to
            reject signature guarantees from Eligible Guarantor Institutions
            that do not, based on credit guidelines, satisfy such written
            standards or procedures. The Trust may change the signature
            guarantee requirements from time to time upon notice to
            shareholders, which may be given by means of a new or supplemented
            Prospectus.
                                                                   Prospectus
                                                                              20
<PAGE>

            Fund Distributions

            Each Fund distributes substantially all of its net investment
            income to shareholders in the form of dividends. You begin earning
            dividends on Fund shares the day after the Trust receives your
            purchase payment. Dividends paid by each Fund with respect to each
            class of shares are calculated in the same manner and at the same
            time, but dividends on Class B and Class C shares are expected to
            be lower than dividends on Class A shares as a result of the
            distribution fees applicable to Class B and Class C shares. The
            Funds intend to declare daily and distribute dividends monthly to
            shareholders of record.

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

             You can choose from the following distribution options:

              . Reinvest all distributions in additional shares of the same
                class of your Fund at NAV. This will be done unless you elect
                another option.
              . Invest all distributions in shares of the same class of any
                other Fund or another series of PIMCO Funds: Pacific
                Investment Management Series or PIMCO Funds: Multi-Manager
                Series which offers that class at NAV. You must have an
                account existing in the Fund or series selected for investment
                with the identical registered name. You must elect this option
                on your account application or by a telephone request to the
                Transfer Agent at 1-800-426-0107.
              . Receive all distributions in cash (either paid directly to you
                or credited to your account with your broker or other
                financial intermediary. You must elect this option on your
                account application or by a telephone request to the Transfer
                Agent at 1-800-426-0107.

             You do not pay any sales charges on shares you receive through
            the reinvestment of Fund distributions.

             If you elect to receive Fund distributions in cash and the postal
            or other delivery service is unable to deliver checks to your
            address of record, the Trust's Transfer Agent will hold the
            returned check for your benefit in a non-interest bearing account.

            Tax Consequences

            The following Information is meant as a general summary for U.S.
            taxpayers. Please see the SAI for additional information. You
            should rely on your own tax adviser for advice about the
            particular federal, state and local tax consequences to you of
            investing in each Fund.

             Each Fund will distribute substantially all of its income and
            gains to its shareholders every year, and shareholders will be
            taxed on distributions they receive unless the distribution is
            derived from tax-exempt income and is designated as an "exempt-
            interest dividend." If a Fund declares a dividend in October,
            November or December but pays it in January, you may be taxed on
            the dividend as if you received it in the previous year.

            .Dividends paid to shareholders of each Fund and derived from
            Municipal Bond interest are expected to be designated by each Fund
            as "exempt-interest dividends" and shareholders may generally
            exclude such dividends from gross income for federal income tax
            purposes. The federal tax exemption for "exempt-interest
            dividends" from Municipal Bonds does not necessarily result in the
            exemption of such dividends from state and local taxes although
            the California Intermediate Municipal Bond Fund and the New York
            Intermediate Municipal Bond Fund intend to arrange their affairs
            so that a portion of such distributions will be exempt from state
            taxes in the respective state. Each Fund may invest a portion of
            its assets in securities that generate income that is not exempt
            from federal or state income tax. Dividends derived from taxable
            interest or capital gains will be subject to federal income tax.
            If a Fund invests in "private activity bonds," certain
            shareholders may become subject to alternative minimum tax on the
            part of the Fund's distributions derived from interest on such
            bonds.

            . If you are subject to U.S. federal income tax, you will be
            subject to tax on Fund distributions derived from taxable interest
            or capital gains whether you received them in cash or reinvested
            them in additional shares of the Funds. For federal income tax
            purposes, Fund distributions that are taxable will be taxable to
            you as either ordinary income or capital gains. Ordinary taxable
            Fund dividends (i.e., distributions of investment income) are
            taxable to you as ordinary income. If the Fund designates a
            dividend as a capital gain distribution, you will pay tax on that
            dividend at the long-term capital gains

  Pacific Investment Management Series
21
<PAGE>

            tax rate, no matter how long you have held your Fund shares.
            Distributions of gains from investments that the Fund owned for 12
            months or less will generally be taxable to you as ordinary
            income.

             Taxable Fund distributions are taxable to you even if they are
            paid from income or gains earned by a Fund prior to your
            investment and thus were included in the price you paid for your
            shares. For example, if you purchase shares on or just before the
            record date of a Fund distribution, you will pay full price for
            the shares and may receive a portion of your investment back as a
            taxable distribution.

             You will generally have a taxable capital gain or loss if you
            dispose of your Fund shares by redemption, exchange or sale. The
            amount of the gain or loss and the rate of tax will depend
            primarily upon how much you pay for the shares, how much you sell
            them for, and how long you hold them. When you exchange shares of
            a Fund for shares of another series, the transaction will be
            treated as a sale of the Fund shares for these purposes, and any
            gain on those shares will generally be subject to federal income
            tax. The Fund will send you a tax report each year. The report
            will tell you which dividends and redemptions must be treated as
            taxable ordinary income and which are short-term or long-term
            capital gains.

             The Funds seek to produce income that is generally exempt from
            U.S. income tax and will not benefit investors in tax-sheltered
            retirement plans or individuals not subject to U.S. income tax.
            Further, the California and New York Intermediate Municipal Bond
            Funds seek to produce income that is generally exempt from the
            relevant state's income tax and will not benefit individuals that
            are not subject to that state's income tax.

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

            Characteristics and Risks of Securities and Investment Techniques

            This section provides additional information about some of the
            principal investments and related risks of the Funds described
            under "Summary Information" above. It also describes
            characteristics and risks of additional securities and investment
            techniques that may be used by the Funds 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
            of securities and investment techniques that may be used by the
            Funds. As with any mutual fund, investors in the Funds 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 Funds.

Securities  In selecting securities for a Fund, PIMCO develops an outlook for
Selection   interest rates and the economy; analyzes credit and call risks,
            and uses other security selection techniques. The proportion of a
            Fund'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. economy,
            the financial markets and other factors.

             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 sectors. 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.        U.S. Government Securities are obligations of, or guaranteed by,
Government  the U.S. Government, its agencies or government-sponsored
Securities  enterprises. 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.

Municipal   Municipal bonds are generally issued by states and local
Bonds       governments and their agencies, authorities and other
            instrumentalities. Municipal bonds are subject to interest rate,
            credit and market risk. The
                                                                   Prospectus
                                                                              22
<PAGE>

            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. The types of municipal bonds in which the Funds may invest
            include municipal lease obligations. The Funds may also invest in
            securities issued by entities whose underlying assets are
            municipal bonds.

Mortgage-   Each Fund may invest in mortgage- or other asset-backed
Related     securities. Mortgage-related securities include mortgage pass-
and Other   through securities, collateralized mortgage obligations ("CMOs"),
Asset-      commercial mortgage-backed securities, mortgage dollar rolls, CMO
Backed      residuals, stripped mortgage-backed securities ("SMBSs") and other
Securities  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 a Fund 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 SMBS has one class receiving all of the interest from
            the mortgage assets (the interest-only, or "IO" class), while the
            other class will receive all of the principal (the principal-only,
            or "PO" class). The yield to maturity on an IO 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 a
            Fund's yield to maturity from these securities. A Fund may not
            invest more than 5% of its assets in any combination of IO, PO, or
            inverse floater securities. The Funds may invest in other asset-
            backed securities that have been offered to investors.

Loan        The Funds may invest in fixed- and floating-rate loans, which
Participa-  investments generally will be in the form of loan participations
tions and   and assignments of portions of such loans. Participations and
Assignments assignments involve special types of risk, including credit risk,
            interest rate risk, liquidity risk, and the risks of being a
            lender. If a Fund 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.

Corporate   Corporate debt securities are subject to the risk of the issuer's
Debt        inability to meet principal and interest payments on the
Securities  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.

High        Securities rated lower than Baa by Moody's or lower than BBB by
Yield       S&P are sometimes referred to as "high yield" or "junk" bonds.
Securities  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 predominately 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 this 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 Fund will not necessarily sell a

23 Pacific Investment Management Series
<PAGE>

            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 Fund 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
            Fund 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 Fund invests in high yield and/or unrated securities, the
            Fund's success in achieving its investment objective may depend
            more heavily on the portfolio manager's creditworthiness analysis
            than if the Fund invested exclusively in higher-quality and rated
            securities.

Variable    Variable and floating rate securities provide for a periodic
and         adjustment in the interest rate paid on the obligations. Each Fund
Floating    may invest in floating rate debt instruments ("floaters") and
Rate        engage in credit spread trades. While floaters provide a certain
Securities  degree of protection against rises in interest rates, a Fund will
            participate in any declines in interest rates as well. Each Fund
            may also invest in inverse floating rate debt instruments
            ("inverse floaters"). An inverse floater may exhibit greater price
            volatility than a fixed rate obligation of similar credit quality.
            A Fund may not invest more than 5% of its assets in any
            combination of inverse floater, interest only, or principal only
            securities.

Inflation-  Inflation-indexed bonds are fixed income securities whose
Indexed     principal value is periodically adjusted according to the rate of
Bonds       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.

Event-      Each Fund may invest in "event-linked bonds," which are fixed
Linked      income securities for which the return of principal and payment of
Bonds       interest is contingent on the non-occurrence of a specific
            "trigger" event, such as a hurricane, earthquake, or other
            physical or weather-related phenomenon. Some event-linked bonds
            are commonly referred to as "catastrophe bonds." If a trigger
            event occurs, a Fund may lose a portion or all of its principal
            invested in the bond. Event-linked bonds often provide for an
            extension of maturity to process and audit loss claims where a
            trigger event has, or possibly has, occurred. An extension of
            maturity may increase volatility. Event-linked bonds may also
            expose the Fund to certain unanticipated risks including credit
            risk, adverse regulatory or jurisdictional interpretations, and
            adverse tax consequences. Event-linked bonds may also be subject
            to liquidity risk.

Convertible Each Fund may invest in convertible securities. Convertible
and         securities are generally preferred stocks and other securities,
Equity      including fixed income securities and warrants, that are
Securities  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 Fund may be forced to convert
            a security before it would otherwise choose, which may have an
            adverse effect on the Fund's ability to achieve its investment
            objective.

             While the Funds 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 Fund may consider
            convertible securities or equity securities to gain exposure to
            such investments.

                                                                   Prospectus 24
<PAGE>

             Equity securities generally have greater price volatility than
            fixed income securities. The market price of equity securities
            owned by a Fund may go up or down, sometimes rapidly or
            unpredictably. Equity securities may decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The value of
            an equity security may also 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 or
            services.

Repurchase  Each Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer and agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund 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     Each Fund may enter into reverse repurchase agreements and dollar
Repurchase  rolls, subject to a Fund's limitations on borrowings. A reverse
Agreements, repurchase agreement or dollar roll involves the sale of a
Dollar      security by a Fund and its agreement to repurchase the instrument
Rolls and   at a specified time and price, and may be considered a form of
Other       borrowing for some purposes. A Fund will segregate assets
Borrowings  determined to be liquid by PIMCO in accordance with procedures
            established by the Board of Trustees or otherwise cover its
            obligations under reverse repurchase agreements, dollar rolls, and
            other borrowings. Reverse repurchase agreements, dollar rolls and
            other forms of borrowings may create leveraging risk for a Fund.

             Each Fund may borrow money to the extent permitted under the
            Investment Company Act of 1940 ("1940 Act"), as amended. This
            means that, in general, a Fund may borrow money from banks for any
            purpose on a secured basis in an amount up to 1/3 of the Fund's
            total assets. A Fund may also borrow money for temporary
            administrative purposes on an unsecured basis in an amount not to
            exceed 5% of the Fund's total assets.

Derivatives Each Fund may, but is not required to, use certain 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 swap agreements. A portfolio manager may
            decide not to employ any of these strategies and there is no
            assurance that any derivatives strategy used by a Fund will
            succeed. A description of these and other derivative instruments
            that the Funds may use are described under "Investment Objectives
            and Policies" in the Statement of Additional Information.

             A Fund's use of derivative instruments involves risks different
            from, or possibly 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 Funds.

             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 Fund uses derivatives
            for leverage, investments in that Fund will tend to be more
            volatile, resulting in larger gains or losses in response to
            market

25 Pacific Investment Management Series
<PAGE>

            changes. To limit leverage risk, each Fund 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 Fund
            will engage in derivatives transactions at any time or from time
            to time. A Fund'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 Fund'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 Fund, the Fund 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 Fund investments. A Fund may also have to buy or sell a
            security at a disadvantageous time or price because the Fund 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 Fund. 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 Fund's use of derivatives may cause
            the Fund to realize higher amounts of short-term capital gains
            (generally taxed at ordinary income tax rates) than if the Fund
            had not used such instruments.

Delayed     The Funds may also enter into, or acquire participations in,
Funding     delayed funding loans and revolving credit facilities, in which a
Loans and   lender agrees to make loans up to a maximum amount upon demand by
Revolving   the borrower during a specified term. These commitments may have
Credit      the effect of requiring a Fund to increase its investment in a
Facilities  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
            a Fund 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.

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

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

             Subject to the restrictions and limitations of the 1940 Act, each
            Fund may, in the future, elect to pursue its investment objective
            by investing in one or more underlying investment vehicles or
            companies that have substantially similar investment objectives,
            policies and limitations as the Fund.

Short       Each Fund may make short sales as part of its overall portfolio
Sales       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.
            Short sales expose a Fund 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

                                                                   Prospectus 26
<PAGE>

            resulting in a loss to the Fund. A Fund making a short sale 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.

Illiquid    Each Fund may invest up to 15% of its net assets in illiquid
Securities  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 Fund 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.

Loans of    For the purpose of achieving income, each Fund may lend its
Portfolio   portfolio securities to brokers, dealers, and other financial
Securities  institutions provided a number of conditions are satisfied,
            including that the loan is fully collateralized. Please see
            "Investment Objectives and Policies" in the Statement of
            Additional Information for details. When a Fund lends portfolio
            securities, its investment performance will continue to reflect
            changes in the value of the securities loaned, and the Fund 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 Fund may pay
            lending fees to a party arranging the loan.

Portfolio   The length of time a Fund has held a particular security is not
Turnover    generally a consideration in investment decisions. A change in the
            securities held by a Fund is known as "portfolio turnover." Each
            Fund 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 Fund, 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 generally taxed at ordinary income tax rates).
            The trading costs and tax effects associated with portfolio
            turnover may adversely affect a Fund's performance.

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

Changes     The investment objective of each Fund is fundamental and may not
in          be changed without shareholder approval. Unless otherwise stated,
Investment  all other investment policies of the Funds may be changed by the
Objectives  Board of Trustees without shareholder approval.
and
Policies

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

Other       The Funds may invest in other types of securities and use a
Investments variety of investment techniques and strategies which are not
and         described in this Prospectus. These securities and techniques may
Techniques  subject the Funds 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 Funds.

27 Pacific Investment Management Series
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help you understand
            the financial performance of Class A, Class B and Class C shares
            of the Municipal Bond Fund since the class of shares was first
            offered. Financial information for the California Intermediate
            Municipal Bond and New York Intermediate Municipal Bond Funds is
            not shown because shares of each Fund were not offered prior to
            August 31, 1999. Certain information reflects financial results
            for a single Fund share. The total returns in the table represent
            the rate that an investor would have earned or lost on an
            investment in a particular class of shares of the Fund, assuming
            reinvestment of all dividends and distributions. This information
            has been audited by PricewaterhouseCoopers LLP, whose report,
            along with the Fund's financial statements, are included in the
            Trust's annual report to shareholders. The annual report is
            incorporated by reference in the Statement of Additional
            Information and is available free of charge upon request from the
            Distributor.


<TABLE>
<CAPTION>
   Municipal Bond                        Class A      Class B      Class C
  ----------------------------------------------------------------------------
   Year or Period Ended................ 03/31/1999   03/31/1999   03/31/1999

   <S>                                  <C>          <C>          <C>
   Net Asset Value Beginning of
    Period.............................   $ 9.97        9.97          9.97

   Net Investment Income (Loss)........   $ 0.41 (a)    0.34 (a)      0.36 (a)

   Net Realized and Unrealized Gain
    (Loss) on Investments..............   $ 0.15 (a)    0.14 (a)      0.15 (a)

   Total Income (Loss) from Investment
    Operations.........................   $ 0.56        0.48          0.51

   Dividends from Net Investment
    Income.............................   $(0.41)      (0.33)        (0.36)

   Dividends in Excess of Net
    Investment Income..................   $ 0.00        0.00          0.00

   Distributions from Net Realized
    Capital Gains......................   $ 0.00        0.00          0.00

   Distributions in Excess of Net
    Realized Capital Gains.............   $ 0.00        0.00          0.00

   Tax Basis Return of Capital.........   $ 0.00        0.00          0.00

   Total Distributions.................   $(0.41)      (0.33)        (0.36)

   Net Asset Value End of Period.......   $10.12       10.12         10.12

   Total Return........................     5.67%       4.88          5.13

   Net Assets End of Period (000's)....   $7,020       6,070        37,913

   Ratio of Expenses to Average
    Net Assets.........................     0.86%       1.61          1.35

   Ratio of Net Investment
    Income to Average Net Assets.......     4.10        3.33          3.60

   Portfolio Turnover Rate.............       70%         70            70
</TABLE>
  -------
  (a)Per share amounts based on average number of shares outstanding during
  the period.
                                                                   Prospectus
                                                                              28
<PAGE>

            Appendix A
            Description of Securities Ratings

            A Fund's investment may range in quality from securities rated in
            the lowest category in which the Fund is 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 Fund's assets invested in securities
            particular rating category will vary. The following terms are
            generally used to described 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 ("Junk Bonds") are
            those rated lower than Baa by Moody's or BBB by S&P and comparable
            securities. They are considered predominantly 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     Corporate and Municipal Bond Ratings
Investors
Service,     Aaa: Bonds which are rated Aaa are judged to be of the best
Inc.        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.

             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
            indicates a mid-range ranking; and the modifier 3 indicates that
            the issue ranks in the lower end of its generic rating category.

            Corporate Short-Term Debt Ratings

            Moody's short-term debt ratings are opinions of the ability 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.


A-1
  Pacific Investment Management Series
<PAGE>

             Moody's employes 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.

            Short-Term Municipal Bond Ratings

            There are four rating categories for short-term municipal bonds
            that define an investment grade situation, which are listed below.
            In the case of variable rate demand obligations (VRDOs), a two-
            component rating is assigned. The first element represents an
            evaluation of the degree of risk associated with scheduled
            principal and interest payments, and the other represents an
            evaluation of the degree of risk associated with the demand
            feature. The short-term rating assigned to the demand feature of
            VRDOs is designated as VMIG. When either the long- or short-term
            aspect of a VRDO is not rated, that piece is designated NR, e.g.,
            Aaa/NR or NR/VMIG 1. MIG ratings terminate at the retirement of
            the obligation while VMIG rating expiration will be a function of
            each issue's specific structural or credit features.

             MIG 1/VMIG 1: This designation denotes best quality. There is
            present strong protection by established cash flows, superior
            liquidity support or demonstrated broad-based access to the market
            for refinancing.

             MIG 2/VMIG 2: This designation denotes high quality. Margins of
            protection are ample although not so large as in the preceding
            group.

             MIG 3/VMIG 3: This designation denotes favorable quality. All
            security elements are accounted for but there is lacking the
            undeniable strength of the preceding grades. Liquidity and cash
            flow protection may be narrow and market access for refinancing is
            likely to be less well established.

             MIG 4/VMIG 4: This designation denotes adequate quality.
            Protection commonly regarded as required of an investment security
            is present and although not distinctly or predominantly
            speculative, there is specific risk.

             SG: This designation denotes speculative quality. Debt
            instruments in this category lack margins of protection.

Standard    Corporate and Municipal Bond Ratings
& Poor's
Ratings     Investment Grade
Services     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 than
            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.
                                                                   Prospectus
                                                                             A-2
<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  An S&P commercial paper rating is a current assessment of the
Paper       likelihood of timely payment of debt having an original maturity
Rating      of no more than 365 days. Ratings are graded into several
Definitions 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 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 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-3
  Pacific Investment Management Series
<PAGE>

             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.
                                                                   Prospectus
                                                                             A-4
<PAGE>

            PIMCO Funds: Pacific Investment Management Series

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

            The SAI includes the PIMCO Funds Shareholders Guide for Class A, B
            and C Shares, a separate booklet which contains more detailed
            information about Fund purchase, redemption and exchange options
            and procedures and other information about the Funds. You can get
            a free copy of the Guide together with or separately from the rest
            of the SAI.

            You may get free copies of the SAI, request other information
            about a Fund, or make shareholder inquiries by calling the Trust
            at 1-800-426-0107, or PIMCO Infolink Audio Response Network at 1-
            800-987-4626, or by writing to:

             PIMCO Funds Pacific Investment Management Series
             840 Newport Center Drive, Suite 300
             Newport Beach, CA 92660

            You can also visit our Web site at www.pimcofunds.com for
            additional information about the Funds.

            You may review and copy information about the Trust, including its
            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
            Trust on the Commission's Web site at www.sec.gov. You may get
            copies of this information, with payment of a duplication fee, by
            writing the Public Reference Section of the Commission,
            Washington, D.C. 20549-0102, or by electronic request at
            [email protected].

            [LOGO OF PIMCO FUNDS APPEARS HERE]

            Investment Company Act File no. 811-5028
<PAGE>

                        --------------------------------------------------------
PIMCO Funds:            INVESTMENT ADVISER AND ADMINISTRATOR
Pacific Investment
Management Series       PIMCO, 840 Newport Center Drive, Suite 300,
                        Newport Beach, CA 92660
                        --------------------------------------------------------
                        DISTRIBUTOR

                        PIMCO Funds Distributors LLC, 2187 Atlantic Street,
                        Stamford, CT 06902-6896
                        --------------------------------------------------------
                        CUSTODIAN

                        State Street Bank & Trust Co., 801 Pennsylvania, Kansas
                        City, MO 64105
                        --------------------------------------------------------
                        SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT

                        PFPC Inc., P.O. Box 9688, Providence, RI 02940-9688
                        --------------------------------------------------------
                        INDEPENDENT ACCOUNTANTS

                        PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City,
                        MO 64105
                        --------------------------------------------------------
                        LEGAL COUNSEL

                        Dechert Price & Rhoads, 1775 Eye Street N.W.,
                        Washington, D.C. 20006-2401
                        -------------------------------------------------------
                        For further information about the PIMCO Funds, call
                        1-800-426-0107 or visit our Web site at
                        http://www.pimcofunds.com.


                        Not part of the Prospectus


<PAGE>

                           PIMCO Funds is on the Web

                              www.pimcofunds.com

A Partial List of What's Available:

On-line Account Access

Daily Share Prices

Daily Manager Commentary

Current and Historical Fund Performance

Lipper Rankings

Morningstar Ratings

Listing of Fund Portfolio Holdings

Risk Analysis

Fund Manager Bios

Downloadable Literature Section

On-line Requests for Literature by Mail

Resources for Investment Professionals


Through the PIMCO Funds Web site, at www.pimcofunds.com, you and your financial
advisor have around-the-clock access to the most timely and comprehensive
information available on PIMCO Funds.

   In addition, the site includes daily commentary from our fund managers, with
insights on the economy and other factors affecting the stock and bond markets.

     And now you can access your account--securely--on-line. The feature is
available to shareholders with direct accounts (a direct account is one where
the shareholder receives statements directly from PIMCO Funds.)

[GRAPHIC]

     You'll find the site to be informative and easy-to-use. It's divided into
three main sections: Investment Insight, Fund Information and Resources.

Investment Insight
The Investment Insight section provides an overview of the investment management
firms under the PIMCO Advisors L.P. umbrella. You'll find an explanation of each
firm's investment process, biographies of the investment team, manager updates
and more.

Fund Information
In the Fund Information section you'll access detailed profiles of all the PIMCO
Funds, including current and historical performance, Lipper rankings and
Morningstar ratings.

     Additionally, we provide a summary of a fund's portfolio--complete with
risk analysis data. You can also obtain daily fund share prices. Please read the
relevant prospectus carefully before you invest in any PIMCO Fund.

Resources
Our Resources section features a variety of useful information, including:

     an on-line document library with applications and prospectuses that you can
view and print

    a literature-by-mail "catalog," so you can order free materials information
about our convenient shareholder services, such as Auto-Invest, Fund Link and
our 24-Hour Telephone Information System

    a listing of the features and benefits of the retirement plans offered by
PIMCO Funds

Questions?
We're sure you'll find the PIMCO Funds Web site to be an invaluable tool. If you
have any questions about the site, call us at 1-800-426-0107.

     Or, send us e-mail at [email protected].

PZ002 3/00                                            Not part of the Prospectus
- --------------------------------------------------------------------------------
          PIMCO
            FUNDS

PIMCO Funds
Distributors LLC

2187 Atlantic Street
Stamford, CT 06902-6896

<PAGE>

                            PIMCO Total Return Fund

                ----------------------------------------------------------------
March 31, 2000  OBJECTIVE

                Seeking maximum total return, consistent with preservation of
                capital and prudent investment management.

                ----------------------------------------------------------------
                PRIMARY INVESTMENTS

                An intermediate-term portfolio of investment grade fixed income
                securities.

                ----------------------------------------------------------------
                INVESTMENT STYLE

                Total Return Strategy  The Fund seeks total return--yield plus
                appreciation.

                Risk Management  The portfolio manager seeks to manage risk in a
                number of ways, such as maintaining an intermediate-term
                portfolio with a duration that normally varies within a 3- to 6-
                year time frame. However, net asset value will fluctuate.

                Quality  The Fund maintains a portfolio primarily consisting of
                investment grade fixed income securities.

                Diversification  Subject to market conditions, the Fund actively
                invests across all sectors of the fixed income market in order
                to maximize investment opportunities

                ----------------------------------------------------------------
                PORTFOLIO MANAGER

                Bill Gross, Founding Managing Director of PIMCO. With over $186
                billion in fixed-income assets under management, the firm is the
                largest bond manager in the country. Bill Gross has over 25
                years investment experience.

                ----------------------------------------------------------------
                FUND PERFORMANCE

                For the latest PIMCO Total Return Fund performance, call 1-800-
                227-7337 or visit our Web site at https://www.pimcofunds.com.

                For more information about the Fund, see the following
                prospectus.
                PIMCO Funds Distributors LLC, 2187 Atlantic Street, Stamford, CT
                06902-6896, www.pimcofunds.com.

                This cover is not part of the Prospectus.

                                                                           PIMCO
                                                                         -------
                                                                           FUNDS

<PAGE>

            PIMCO Total Return Fund

PIMCO       This Prospectus describes the PIMCO Total Return Fund. The Fund
Funds       provides access to the professional investment advisory services
            offered by Pacific Investment Management Company ("PIMCO"). As of
Prospectus  December 31, 1999, PIMCO managed approximately $186 billion in
            assets.
March 31,
2000        This Prospectus explains what you should know about the Fund
            before you invest. Please read it carefully.

            This prospectus is intended for participants in designated
            employer-sponsored retirement or savings plans. The administrator
            of your retirement plan or your employee benefits office can
            provide you with detailed information on how to participate in
            your plan and how to elect the Fund as an investment option.

            The Securities and Exchange Commission has not approved or
            disapproved these securities, or determined if this Prospectus is
            truthful or complete. Any representation to the contrary is a
            criminal offense.
                                                                   Prospectus
                                                                               1
<PAGE>



            Table of Contents

<TABLE>
         <S>                                                               <C>
         Summary Information..............................................   3
         Fund Summary.....................................................   4
         Summary of Principal Risks.......................................   6
         Management of the Fund...........................................   7
         How Fund Shares are Priced.......................................   8
         How to Buy and Sell Shares.......................................   9
         Fund Distributions...............................................  10
         Tax Consequences.................................................  10
         Characteristics and Risks of Securities and Investment
          Techniques......................................................  11
         Financial Highlights.............................................  18
         Appendix A--Description of Securities Ratings.................... A-1
</TABLE>

  PIMCO Funds: Pacific Investment Management Series
2
<PAGE>

            Summary Information

 The table below describes certain investment characteristics of the Fund.
 Other important characteristics are described in the Fund Summary beginning
 on page 4. Following the table are certain key concepts which are used
 throughout the prospectus.

<TABLE>
<CAPTION>
                        Main Investments                      Duration            Credit Quality(1)      Foreign(2)
 ------------------------------------------------------------------------------------------------------------------
  <C> <C>               <S>                                   <C>                 <C>                    <C>
      Total Return Fund Intermediate maturity fixed income    3-6 years           B to Aaa; max 10%      0-20%
                        securities                                                below Baa
 ------------------------------------------------------------------------------------------------------------------
</TABLE>

 (1) As rated by Moody's Investors Service, Inc., or if unrated, determined by
     PIMCO to be of comparable quality.
 (2) The percentage limitation relates to non-U.S. dollar denominated
     securities. The Fund may invest beyond this limit in U.S. dollar-
     denominated securities of foreign issuers.

Fixed       "Fixed Income Instruments" as used in this Prospectus includes:
Income
Instru-     . securities issued or guaranteed by the U.S. Government, its
ments         agencies or government-sponsored enterprises ("U.S. Government
              securities");
            . corporate debt securities, including convertible securities and
              corporate commercial paper;
            . mortgage-backed and other asset-backed securities;
            . inflation-indexed bonds issued both by governments and
              corporations;
            . structured notes, including hybrid or "indexed" securities,
              catastrophe bonds and loan participations;
            . delayed funding loans and revolving credit facilities;
            . bank certificates of deposit, fixed time deposits and bankers'
              acceptances;
            . repurchase agreements and reverse repurchase agreements;
            . debt securities issued by states or local governments and their
              agencies, authorities and other instrumentalities;
            . obligations of foreign governments or their subdivisions,
              agencies and instrumentalities; and
            . obligations of international agencies or supranational entities.

Duration    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 Fund with a longer average portfolio duration
            will be more sensitive to changes in interest rates than a Fund
            with a shorter average portfolio duration.

Credit      In this Prospectus, references are made to credit ratings of debt
Ratings     securities which measure an issuer's expected ability to pay
            principal and interest over time. Credit ratings are determined by
            rating organizations, such as Standard & Poor's Rating Service
            ("S&P") or Moody's Investors Service, Inc. ("Moody's"). The
            following terms are generally used to describe the credit quality
            of debt securities depending on the security's credit rating or,
            if unrated, credit quality as determined by PIMCO:

            .  high quality
            . investment grade
            . below investment grade ("high yield securities" or "junk bonds")

            For a further description of credit ratings, see "Appendix A--
            Description of Securities Ratings."

Fund        The following summary identifies the Fund's investment objective,
Descrip-    principal investments and strategies, principal risks, performance
tions,      information and fees and expenses. A more detailed "Summary of
Performance Principal Risks" describing principal risks of investing in the
and Fees    Fund begins after the Fund Summary.

             It is possible to lose money on investments in the Fund.

             An investment in the Fund is not a deposit of a bank and is not
            guaranteed or insured by the Federal Deposit Insurance Corporation
            or any other government agency.
                                                                   Prospectus
                                                                               3
<PAGE>

            PIMCO Total Return Fund

- --------------------------------------------------------------------------------
Principal     Investment Objective  Fund Focus          Credit Quality
Investments   Seeks maximum         Intermediate        B to Aaa;
and           total return,         maturity fixed      maximum 10%
Strategies    consistent with       income              below Baa
              preservation of       securities
              capital and                               Dividend Frequency
              prudent               Average Portfolio   Declared daily and
              investment            Duration            distributed monthly
              management            3-6 years

              Fund Category
              Intermediate Duration
              Bond

            The Fund seeks to achieve its investment objective by investing
            under normal circumstances at least 65% of its assets in a
            diversified portfolio of Fixed Income Instruments of varying
            maturities. The average portfolio duration of this Fund normally
            varies within a three- to six-year time frame based on PIMCO's
            forecast for interest rates.

             The Fund invests primarily in investment grade debt securities,
            but may invest up to 10% of its assets in high yield securities
            ("junk bonds") rated B or higher by Moody's or S&P, or, if
            unrated, determined by PIMCO to be of comparable quality. The Fund
            may invest up to 20% of its assets in securities denominated in
            foreign currencies, and may invest beyond this limit in U.S.
            dollar-denominated securities of foreign issuers. The Fund 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.

             The Fund may invest all of its assets in derivative instruments,
            such as options, futures contracts or swap agreements, or in
            mortgage- or asset-backed securities. The Fund may lend its
            portfolio securities to brokers, dealers and other financial
            institutions to earn income. The Fund may seek to obtain market
            exposure to the securities in which it primarily invests by
            entering into a series of purchase and sale contracts or by using
            other investment techniques (such as buy backs or dollar rolls).
            The "total return" sought by the Fund consists of income earned on
            the Fund's 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   Among the principal risks of investing in the Fund, which could
Risks       adversely affect its net asset value, yield and total return, are:

             .Interest Rate Risk    .Derivatives Risk     .Currency Risk
             .Credit Risk           .Liquidity Risk       .Leveraging Risk
             .Market Risk           .Mortgage Risk        .Management Risk
             .Issuer Risk           .Foreign Investment Risk

            Please see "Summary of Principal Risks" following the Fund Summary
            for a description of these and other risks of investing in the
            Fund.
- --------------------------------------------------------------------------------
Performance The top of the next page shows summary performance information for
Information the Fund's Class A shares in a bar chart and an Average Annual
            Total Returns table. The information provides some indication of
            the risks of investing in the Fund by showing changes in its
            performance from year to year and by showing how the Fund's
            average annual returns compare with the returns of a broad-based
            securities market index and an index of similar funds. The bar
            chart and the Average Annual Total Returns table do not reflect
            the deduction of sales charges (loads) that may apply if Class A
            shares are purchased outside of a designated employer-sponsored
            retirement or savings plan. If sales charges (loads) were
            reflected, the returns would be lower than those shown. For
            periods prior to the inception date of Class A shares (1/13/97),
            performance information shown in the bar chart and table is based
            on the performance of the Fund's Institutional Class shares, which
            are offered in a different prospectus. The prior Institutional
            Class performance has been adjusted to reflect the actual
            distribution and/or service (12b-1) fees, administrative fees and
            other expenses paid by Class A shares. Past performance is no
            guarantee of future results.

  PIMCO Funds: Pacific Investment Management Series
4
<PAGE>

            PIMCO Total Return Fund (continued)


            Calendar Year Total Returns -- Class A

                  [GRAPH]                                   Highest and Lowest
                                                            Quarter Returns
  90      91      92       93       94      95              (for periods shown
 ----   -----    ----    -----    -----    -----            in the bar chart)
 7.54%  19.02%   9.26%   12.05%   -4.02%   19.23%           --------------------
                                                            3rd Qtr. '91   6.54%
  96      97      98      99                                --------------------
 ----    ----    ----    -----                              1st Qtr. '94  -2.80%
 4.22%   9.65%   9.25%   -0.75%

                   Calendar Year End (through 12/31)

            Average Annual Total Returns (for periods ended 12/31/99)
<TABLE>
         <S>                                             <C>    <C>     <C>
                                                         1 Year 5 Years 10 Years
            --------------------------------------------------------------------
         Class A                                         -5.21% 7.13%   7.81%
            --------------------------------------------------------------------
         Lehman Brothers Aggregate Bond Index(/1/)       -0.82% 7.73%   7.70%
            --------------------------------------------------------------------
         Lipper Intermediate Investment Grade Debt Fund
          Avg(/2/)                                       -1.31% 6.79%   7.09%
            --------------------------------------------------------------------
</TABLE>

            (1)  The Lehman Brothers Aggregate Bond Index is an unmanaged
                 index of investment grade, U.S. dollar-denominated fixed
                 income securities of domestic issuers having a maturity
                 greater than one year. It is not possible to invest directly
                 in the index.
            (2)  The Lipper Intermediate Investment Grade Debt Fund Average is
                 a total return performance average of Funds tracked by Lipper
                 Analytical Services, Inc. that invest at least 65% of their
                 assets in investment-grade debt issues (rated in the top four
                 grades) with dollar-weighted average maturities of five to
                 ten years. It does not take into account sales charges.

- --------------------------------------------------------------------------------
Fees and    These tables describe the fees and expenses you may pay if you buy
Expenses    and hold Class A shares of the Fund:
of the
Fund
            Shareholder fees (fees paid directly from your
            investment)                                               None(/1/)


            (1)  The shares in this prospectus are offered to participants in
                 designated employer-sponsored retirement or savings plans
                 without a sales load. Class A shares purchased other than
                 through such plans may be subject to a sales load.

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

<TABLE>
         <S>       <C>        <C>              <C>             <C>
                              Distribution                     Total Annual
                   Advisory   and/or Service   Other           Fund Operating
                   Fees       (12b-1) Fees     Expenses(/1/)   Expenses
            ------------------------------------------------------------------
         Class A   0.25%      0.25%            0.40%           0.90%
            ------------------------------------------------------------------

            (1)  Other Expenses reflects a 0.40% Administrative Fee paid by
                 the class.

            Examples. The Examples are intended to help you compare the cost
            of investing in Class A shares of the Fund with the costs of
            investing in other mutual funds. The Examples assume that you
            invest $10,000 in Class A shares for the time periods indicated,
            and then redeem all your shares at the end of those periods. The
            Example also assumes that your investment has a 5% return each
            year, the reinvestment of all dividends and distributions, and the
            Fund'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.

                   Year 1     Year 3           Year 5          Year 10
            ------------------------------------------------------------------
         Class A   $92        $287              $498           $1,108
            ------------------------------------------------------------------
</TABLE>
                                                                   Prospectus
                                                                               5
<PAGE>

            Summary of Principal Risks

            The value of your investment in the Fund changes with the values
            of the Fund's investments. Many factors can affect those values.
            The factors that are most likely to have a material effect on the
            Fund's portfolio as a whole are called "principal risks." The
            principal risks of the Fund are identified in the Fund Summary and
            are summarized in this section. The Fund may be subject to
            additional principal risks and risks other than those described
            below because the types of investments made by the Fund 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 Fund, its investments and the related risks. There is no
            guarantee that the Fund will be able to achieve its investment
            objective.

Interest    As interest rates rise, the value of fixed income securities in
Rate Risk   the Fund'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.

Credit      The Fund could lose money if the issuer or guarantor of a fixed
Risk        income security, or the counterparty to a derivatives contract,
            repurchase agreement or a 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. Funds that invest 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 Funds that do not
            invest in such securities. High yield securities are considered
            predominately 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 a Fund's ability
            to sell its high yield securities (liquidity risk).

Market      The market price of securities owned by the Fund may go up or
Risk        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. Equity securities
            generally have greater price volatility than fixed income
            securities.

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

Liquidity   Liquidity risk exists when particular investments are difficult to
Risk        purchase or sell, possibly preventing the Fund from selling such
            illiquid securities at an advantageous time or price. Investing in
            foreign securities, derivatives or securities with substantial
            market and/or credit risk will tend to increase liquidity risk.

Derivatives Derivatives are financial contracts whose value depends on, or is
Risk        derived from, the value of an underlying asset, reference rate or
            index. The various derivative instruments that the Fund 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 and
            Policies" in the Statement of Additional Information. The Fund may
            sometimes use derivatives as part of a strategy designed to reduce
            exposure to other risks, such as interest rate or currency risk.
            The Fund may also use derivatives for leverage, in which case
            their use would involve leveraging risk. The Fund's use of
            derivative instruments involves 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
  PIMCO Funds: Pacific Investment Management Series
6
<PAGE>

            index. If the Fund invests in a derivative instrument it 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 Fund will engage in these
            transactions to reduce exposure to other risks when that would be
            beneficial.

Mortgage    When the Fund purchases mortgage-related securities, it is subject
Risk        to certain additional risks. Rising interest rates tend to extend
            the duration of mortgage-related securities, making them more
            sensitive to changes in interest rates. As a result, in a period
            of rising interest rates, if the Fund holds mortgage-related
            securities it 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 Fund because it will have to reinvest that
            money at the lower prevailing interest rates.

Foreign     When the Fund invests in foreign securities, it may experience
Investment  more rapid and extreme changes in value than if it invested
Risk        exclusively in 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 Fund's investments in a
            foreign country. In the event of nationalization, expropriation or
            other confiscation, the Fund 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 Fund invests a
            significant portion of its assets in a concentrated geographic
            area like Eastern Europe or Asia, the Fund will generally have
            more exposure to regional economic risks associated with foreign
            investments.

Currency    When the Fund invests directly in foreign currencies or in
Risk        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, or by the imposition of currency
            controls or other political developments in the U.S. or abroad.

Leveraging  Certain transactions may give rise to a form of leverage. Such
Risk        transactions may include, among others, reverse repurchase
            agreements, loans of portfolios securities, and the use 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 the Fund 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 the Fund to be more volatile than if the Fund had not
            been leveraged. This is because leverage tends to exaggerate the
            effect of any increase or decrease in the value of the Fund's
            portfolio securities.

Management  The Fund is subject to management risk because it is an actively
Risk        managed investment portfolio. PIMCO and each individual portfolio
            manager will apply investment techniques and risk analyses in
            making investment decisions for the Funds, but there can be no
            guarantee that these will produce the desired results.

            Management of the Fund

Investment  PIMCO serves as the investment adviser and the administrator
Adviser     (serving in its capacity as administrator, the "Administrator")
and         for the Fund. Subject to the supervision of the Board of Trustees,
Admini-     PIMCO is responsible for managing the investment activities of the
strator     Fund and the Fund's business affairs and other administrative
            matters.

             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.
                                                                   Prospectus
                                                                               7
<PAGE>

Advisory    The Fund pays PIMCO fees in return for providing investment
Fees        advisory services. For the fiscal year ended March 31, 1999, the
            Fund paid monthly advisory fees to PIMCO at the annual rate
            (stated as a percentage of the average daily net assets of the
            Fund) of 0.25%.

Admini-     The Fund pays for the administrative services it requires under a
strative    fee structure which is essentially fixed. Class A shareholders of
Fees        the Fund pay an administrative fee to PIMCO, computed as a
            percentage of the Fund's assets attributable in the aggregate to
            that class of shares. PIMCO, in turn, provides administrative
            services for Class A shareholders and also bears the costs of
            various third-party services required by the Fund, including
            audit, custodial, portfolio accounting, legal, transfer agency and
            printing costs. The result of this fee structure is an expense
            level for Class A shareholders of the Fund that, with limited
            exceptions, is precise and predictable under ordinary
            circumstances.

             For the fiscal year ended March 31, 1999, the Fund paid PIMCO
            monthly administrative fees at the annual rate (stated as a
            percentage of the average daily net assets attributable in the
            aggregate to the Fund's Class A shares) of 0.40%.

Individual  The following person has primary responsibility for managing the
Portfolio   Fund.
Manager

<TABLE>
<CAPTION>
           Portfolio
           Manager          Since  Recent Professional Experience
             --------------------------------------------------------------------------------------------------
           <C>              <C>   <S>
           William H. Gross 5/87*  Managing Director, Chief Investment Officer and a founding partner of PIMCO.
</TABLE>
            -------
            * Since inception of the Fund.


Distributor The Fund's Distributor is PIMCO Funds Distributors LLC, a wholly
            owned subsidiary of PIMCO Advisors. The Distributor, located at
            2187 Atlantic Street, Stamford, CT 06902, is a broker-dealer
            registered with the SEC.

Distri-     The Fund pays fees to the Distributor on an ongoing basis as
bution      compensation for the services the Distributor renders and the
and         expenses it bears in connection with personal services rendered to
Servicing   Fund shareholders and the maintenance of shareholder accounts
(12b-1)     ("servicing fees"). These payments are made pursuant to a
Plan        Distribution and Servicing Plan ("12b-1 Plan") adopted by the Fund
            pursuant to Rule 12b-1 under the Investment Company Act of 1940.

             The maximum annual rate at which the servicing fees may be paid
            under the 12b-1 Plan (calculated as a percentage of the Fund's
            average daily net assets attributable to Class A shares) is 0.25%.

            How Fund Shares Are Priced

             The net asset value ("NAV") of a Fund's Class A shares is
            determined by dividing the total value of a Fund's portfolio
            investments and other assets attributable to that class, less any
            liabilities, by the total number of shares outstanding of that
            class.

             For purposes of calculating NAV, 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 NAV of a Fund'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, redeem or exchange shares.

  PIMCO Funds: Pacific Investment Management Series
8
<PAGE>

             Fund shares are valued at the close of regular trading (normally
            4:00 p.m., Eastern time) (the "NYSE Close") on each day that the
            New York Stock Exchange is open. For purposes of calculating the
            NAV, the Fund normally uses pricing data for domestic equity
            securities received shortly after the NYSE Close and do not
            normally take into account trading, clearances or settlements that
            take place after the NYSE Close. Domestic fixed income and foreign
            securities are normally priced using data reflecting the earlier
            closing of the principal markets for those securities. Information
            that becomes known to the Fund or its agents after the NAV has
            been calculated on a particular day will not generally be used to
            retroactively adjust the price of a security or the NAV determined
            earlier that day.

             In unusual circumstances, instead of valuing securities in the
            usual manner, the Fund 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 the NYSE
            Close.

            How to Buy and Sell Shares

            The following section provides basic information about how to buy
            and sell (redeem) shares of the Fund.

Calculation When you buy shares of the Fund, you pay a price equal to the NAV
of Share    of the shares, and when you sell (redeem) shares, you receive an
Price and   amount equal to the NAV of the shares. NAVs are determined at the
Redemption  close of regular trading (normally 4:00 p.m., Eastern time) on
Payments    each day the New York Stock Exchange is open. See "How Fund Shares
            Are Priced" above for details. Generally, purchase and redemption
            orders for Fund shares are processed at the NAV next calculated
            after your order is received by the Distributor. However,
            contributions received by the Distributor after the offering price
            is determined that day will receive such offering price if the
            contributions were received by the plan administrator prior to
            such determination and were transmitted to and received by the
            Distributor prior to 10:00 Eastern time on the next business day.

             The Trust does not calculate NAVs or process orders on days when
            the New York Stock Exchange is closed. If your purchase or
            redemption order is received by the Distributor on a day when the
            New York Stock Exchange is closed, it will be processed on the
            next succeeding day when the New York Stock Exchange is open
            (according to the succeeding day's NAV).

             Redemptions of Fund shares may be suspended when trading on the
            New York Stock Exchange is restricted or during an emergency which
            makes it impracticable for the Funds to dispose of their
            securities or to determine fairly the value of their net assets,
            or during any other period as permitted by the Securities and
            Exchange Commission for the protection of investors. Under these
            and other unusual circumstances, the Trust may suspend redemptions
            or postpone payment for more than seven days, as permitted by law.

Buying      The Class A shares of the Fund offered through this prospectus are
Shares      available as an investment option in retirement or savings plans.
            The administrator of such a plan or your employee benefits office
            can provide detailed information on how to participate in such a
            plan and how to elect the Fund as an investment option. The terms
            of a plan may restrict the frequency or timing of your
            contributions, allocations or redemptions, which may have the
            effect of limiting your ability to respond to changing markets
            conditions.

             You may be permitted to elect different investment options, alter
            the amounts contributed to your plan, or change how contributions
            are allocated among investment options in accordance with the
            plan's specific provisions. You should consult the plan
            administrator or your employee benefits office for more details.

             Questions about the Fund should be directed to the Distributor at
            1-800-426-0107. Questions about your plan account should be
            directed to the plan administrator or the organization that
            provides recordkeeping services for the plan.

             The Distributor, in its sole discretion, may accept or reject any
            order for purchase of Fund shares. The sale of shares will be
            suspended during any period in which the New York Stock Exchange
            is closed for other than weekends or holidays, or, if permitted by
            the rules of the Securities and Exchange Commission, when trading
            on the New York Stock Exchange is restricted or during an
            emergency which makes it impracticable for the Fund to dispose of
            its securities or determine fairly its net asset value, or during
            any other period as permitted by the Securities and Exchange
            Commission for the protection of investors.
                                                                   Prospectus
                                                                               9
<PAGE>

             The Fund sells Class A shares at NAV without a sales load to
            trustees or other fiduciaries purchasing shares for certain plans
            sponsored by employers, professional organizations or associations
            or charitable organizations, the trustee, administrator,
            fiduciary, broker, trust company or registered investment adviser
            for which has an agreement with the Distributor with respect to
            such purchases, and to participants in such plans and their
            spouses purchasing for their account(s). Class A shares sold other
            than through designated employer-sponsored retirement or savings
            plans may have different sales charges and expense levels. The
            Distributor will pay a commission to dealers who sell Class A
            shares of the Fund at net asset value to certain employer-
            sponsored plans according to the following schedule: 0.50% of the
            first $2,000,000 and 0.25% of amounts over $2,000,000. From time
            to time, the Distributor, its parent and/or its affiliates may
            make additional payments to one or more participating brokers
            based upon factors such as the level of sales or the length of
            time clients' assets have remained in the Trust.

Exchanges   Your plan may allow exchanges from one investment option to
            another. You should check with the plan administrator for details
            on the rules governing exchanges in the plan, including the
            frequency of permitted exchanges. Certain investment options may
            be subject to unique restrictions. Exchanges are accepted by the
            Trust only as permitted by your plan.

Selling     Your plan administrator or employee benefits office can provide
Shares      you with information on how to sell (redeem) the Fund's shares.
            You will not pay any special fees or charges to the Trust or the
            Distributor when you sell your shares. Redemptions of Fund shares
            may be suspended when trading on the New York Stock Exchange is
            restricted or during an emergency which makes it impracticable for
            the Funds to dispose of their securities or to determine fairly
            the value of their net assets, or during any other period as
            permitted by the Securities and Exchange Commission for the
            protection of investors.

            Fund Distributions

            The Fund distributes substantially all of its net investment
            income to shareholders in the form of dividends. You begin earning
            dividends on Fund shares the day after the Trust receives your
            purchase payment. The Fund intends to declare income dividends
            daily to shareholders of record and distribute them monthly.

             In addition, the Fund distributes any net capital gains it earns
            from the sale of portfolio securities to shareholders no less
            frequently than annually. Net short-term capital gains may be paid
            more frequently. Distributions are reinvested in additional shares
            of the same class of your Fund at NAV. You do not pay any sales
            charges on shares you receive through the reinvestment of Fund
            distributions.


            Tax Consequences

            Distributions received by tax-exempt shareholders will not be
            subject to federal income tax to the extent permitted under
            applicable tax law. To the extent that you are not exempt from tax
            on Fund distributions, you will be subject to tax on Fund
            distributions whether you received them in cash or reinvested them
            in additional shares of the Fund. For federal income tax purposes,
            Fund distributions will be taxable as either ordinary income or
            capital gains.

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

             Fund distributions are taxable to you even if they are paid from
            income or gains earned by a Fund prior to your investment and thus
            were included in the price you paid for your shares. For example,
            if you purchase shares on or just before the record date of a Fund
            distribution, you will pay full price for the shares and may
            receive a portion of your investment back as a taxable
            distribution. Any gain resulting from the sale of Fund 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 Fund dividends and capital distributions.
            Please see the Statement of Additional Information for additional
            information regarding the tax aspects of investing in the Funds.

  PIMCO Funds: Pacific Investment Management Series
10
<PAGE>

            Characteristics and Risks of Securities and Investment Techniques

            This section provides additional information about some of the
            principal investments and related risks of the Fund described
            under "Summary Information" above. It also describes
            characteristics and risks of additional securities and investment
            techniques that may be used by the Fund 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
            of securities and investment techniques that may be used by the
            Fund. As with any mutual fund, investors in the Fund 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 Fund.

Securities  The Fund seeks maximum total return. The total return sought by
Selection   the Fund consists of both income earned on a Fund's investments
            and capital appreciation, if any, arising from increases in the
            market value of the Fund'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 selecting securities for the Fund, 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 the Fund'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.

             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.        U.S. Government securities are obligations of, or guaranteed by,
Government  the U.S. Government, its agencies or government-sponsored
Securities  enterprises. 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.

Municipal   Municipal bonds are generally issued by states and local
Bonds       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.

Mortgage-   The Fund may invest all of its assets in mortgage-or other asset-
Related     backed securities. Mortgage-related securities include mortgage
and Other   pass-through securities, collateralized mortgage obligations
Asset-      ("CMOs"), commercial mortgage-backed securities, mortgage dollar
Backed      rolls, CMO residuals, stripped mortgage-backed securities
Securities  ("SMBSs") 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 Fund 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
                                                                   Prospectus
                                                                              11
<PAGE>

            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 SMBS has one class receiving all of the interest from
            the mortgage assets (the interest-only, or "IO" class), while the
            other class will receive all of the principal (the principal-only,
            or "PO" class). The yield to maturity on an IO 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
            Fund's yield to maturity from these securities. The Fund may not
            invest more than 5% of its net assets in any combination of IO,
            PO, or inverse floater securities. The Fund may invest in other
            asset-backed securities that have been offered to investors.

Loan        The Fund may invest in fixed- and floating-rate loans, which
Partici-    investments generally will be in the form of loan participations
pations     and assignments of portions of such loans. Participations and
and         assignments involve special types of risk, including credit risk,
Assignments interest rate risk, liquidity risk, and the risks of being a
            lender. If the Fund 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.

Corporate   Corporate debt securities are subject to the risk of the issuer's
Debt        inability to meet principal and interest payments on the
Securities  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.

High        Securities rated lower than Baa by Moody's Investors Service, Inc.
Yield       ("Moody's") or lower than BBB by Standard & Poor's Ratings
Securities  Services ("S&P") 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 predominately 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. The Fund 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.

             The Fund 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
            Fund 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 the Fund invests in high yield and/or unrated securities, the
            Fund's success in achieving its investment objective may depend
            more heavily on the portfolio manager's creditworthiness analysis
            than if the Fund invested exclusively in higher-quality and rated
            securities.

Variable    Variable and floating rate securities provide for a periodic
and         adjustment in the interest rate paid on the obligations. The Fund
Floating    may invest in floating rate debt instruments ("floaters") and
Rate        engage in credit spread trades. While floaters provide a certain
Securities  degree of protection against rises in interest rates, the Fund
            will participate in any declines in interest rates as well. The
            Fund may also invest in inverse floating rate debt instruments
            ("inverse floaters"). An inverse floater may exhibit greater price
            volatility than a fixed rate obligation of similar credit quality.
            The Fund may not invest more than 5% of its net assets in any
            combination of inverse floater, interest only, or principal only
            securities.

  PIMCO Funds: Pacific Investment Management Series
12
<PAGE>

Inflation-  Inflation-indexed bonds are fixed income securities whose
Indexed     principal value is periodically adjusted according to the rate of
Bonds       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.

Event-      The Fund may invest in "event-linked bonds," which are fixed
Linked      income securities for which the return of principal and payment of
Bonds       interest is contingent on the non-occurrence of a specific
            "trigger" event, such as a hurricane or an earthquake or other
            physical or weather-related phenomenon. Some event-linked bonds
            are commonly referred to as "catastrophe bonds." If a trigger
            event occurs, the Fund may lose a portion or all of its principal
            invested in the bond. Event-linked bonds often provide for an
            extension of maturity to process and audit loss claims where a
            trigger event has, or possibly has, occurred. An extension of
            maturity may increase volatility. Event-linked bonds may also
            expose the Fund 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.

Convertible The Fund may invest in convertible securities. Convertible
and         securities are generally preferred stocks and other securities,
Equity      including fixed income securities and warrants, that are
Securities  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. The Fund may be forced to
            convert a security before it would otherwise choose, which may
            have an adverse effect on the Fund's ability to achieve its
            investment objective.

             While the Fund intends to invest primarily in fixed income
            securities, it 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, the Fund may consider
            convertible securities or equity securities to gain exposure to
            such investments.

             Equity securities generally have greater price volatility than
            fixed income securities. The market price of equity securities
            owned by a Fund may go up or down, sometimes rapidly or
            unpredictably. Equity securities may decline in value due to
            factors affecting equity securities markets generally or
            particular industries represented in those markets. The value of
            an equity security may also 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 or
            services.

Foreign     Investing in foreign securities involves special risks and
Securities  considerations not typically associated with investing in U.S.
            securities. Shareholders should consider carefully the substantial
            risks involved 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 exhibit greater price volatility.
            Investments in foreign securities may also involve higher
            custodial costs than domestic investments and
                                                                   Prospectus
                                                                              13
<PAGE>

            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.

             The Fund also may invest in sovereign debt issued by governments,
            their agencies or instrumentalities, or other government-related
            entities. Holders of sovereign debt may be requested to
            participate in the rescheduling of such debt and to extend further
            loans to governmental entities. In addition, there is no
            bankruptcy proceeding by which defaulted sovereign debt may be
            collected.

             Emerging Market Securities. The Fund may invest up to 10% of its
            assets in securities of issuers based in countries with developing
            (or "emerging market") economies. 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; 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 the Fund. 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 the Fund 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 Fund 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 Fund may be subject to
            restructuring arrangements or to requests for new credit, which
            may cause the Fund to suffer a loss of interest or principal on
            any of its holdings.

Foreign     If the Fund invests directly in foreign currencies or in
Currencies  securities that trade in, or receive revenues in, foreign
            currencies, it will be 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,
            uncertainty surrounds the introduction of the euro (a common
            currency unit for the European Union) and the effect it may have
            on the value of European currencies as well as securities
            denominated in local European currencies. These and other
            currencies in which the Fund's assets are denominated may be
            devalued against the U.S. dollar, resulting in a loss to the Fund.

             Foreign Currency Transactions. The Fund 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
            Fund'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 Fund 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 realized if the value of
            the hedged currency increases. The Fund 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 Fund will engage in such
            transactions at any given time or from time to time. Also, such
            transactions may not be successful and

  PIMCO Funds: Pacific Investment Management Series
14
<PAGE>

            may eliminate any chance for the Fund to benefit from favorable
            fluctuations in relevant foreign currencies. The Fund may use one
            currency (or a basket of currencies) to hedge against adverse
            changes in the value of another currency (or a basket of
            currencies) when exchange rates between the two currencies are
            positively correlated. The Fund 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.

Repurchase  The Fund may enter into repurchase agreements, in which the Fund
Agreements  purchases a security from a bank or broker-dealer and agrees to
            repurchase the security at the Fund's cost plus interest within a
            specified time. If the party agreeing to repurchase should
            default, the Fund 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     The Fund may enter into reverse repurchase agreements and dollar
Repurchase  rolls, subject to the Fund's limitations on borrowings. A reverse
Agreements, repurchase agreement or dollar roll involves the sale of a
Dollar      security by a Fund and its agreement to repurchase the instrument
Rolls and   at a specified time and price, and may be considered a form of
Other       borrowing for some purposes. The Fund will segregate assets
Borrowings  determined to be liquid by PIMCO in accordance with procedures
            established by the Board of Trustees to cover its obligations
            under reverse repurchase agreements, dollar rolls, and other
            borrowings. Reverse repurchase agreements, dollar rolls and other
            forms of borrowings may create leveraging risk for the Fund.

             The Fund may borrow money to the extent permitted under the
            Investment Company Act of 1940 ("1940 Act"), as amended. This
            means that, in general, a Fund may borrow money from banks for any
            purpose on a secured basis in an amount up to 1/3 of the Fund's
            total assets. A Fund may also borrow money for temporary
            administrative purposes on an unsecured basis in an amount not to
            exceed 5% of the Fund's total assets.

Derivatives The Fund 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 swap agreements. The Fund may invest all
            of its assets in derivative instruments, subject to the Fund'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 Fund will succeed. A description of
            these and other derivative instruments that the Funds may use are
            described under "Investment Objectives and Policies" in the
            Statement of Additional Information.

             The Fund'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 Fund.

             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 the Fund uses derivatives
            for leverage,
                                                                   Prospectus
                                                                              15
<PAGE>

            investments in that Fund will tend to be more volatile, resulting
            in larger gains or losses in response to market changes. To limit
            leverage risk, the Fund 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 the Fund
            will engage in derivatives transactions at any time or from time
            to time. The Fund'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 the Fund's
            interest. If a portfolio manager incorrectly forecasts the values
            of securities, currencies or interest rates or other economic
            factors in using derivatives for the Fund, the Fund 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 Fund investments. The Fund may
            also have to buy or sell a security at a disadvantageous time or
            price because the Fund 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 the Fund. 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, the Fund's use of derivatives may
            cause the Fund to realize higher amounts of short-term capital
            gains (generally taxed at ordinary income tax rates) than if the
            Fund had not used such instruments.

Delayed     The Fund may also enter into, or acquire participations in,
Funding     delayed funding loans and revolving credit facilities, in which a
Loans and   lender agrees to make loans up to a maximum amount upon demand by
Revolving   the borrower during a specified term. These commitments may have
Credit      the effect of requiring the Fund to increase its investment in a
Facilities  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 Fund 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.

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


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

             Subject to the restrictions and limitations of the 1940 Act, the
            Fund may, in the future elect to pursue its investment objective
            by investing in one or more underlying investment vehicles or
            companies that have substantially similar investment objectives,
            policies and limitations as the Fund.

Short       The Fund may make short sales as part of its overall portfolio
Sales       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

  PIMCO Funds: Pacific Investment Management Series
16
<PAGE>

            from a broker or other institution to complete the sale. Short
            sales expose the Fund 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 Fund. When the Fund makes a short sale,
            it 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.

Illiquid    The Fund may invest up to 15% of its net assets in illiquid
Securities  securities. Certain illiquid securities may require pricing at
            fair value as determined in good faith under the supervision of
            the Board of Trustees. The Fund 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 Fund 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.

Loans of    For the purpose of achieving income, the Fund may lend its
Portfolio   portfolio securities to brokers, dealers, and other financial
Securities  institutions provided a number of conditions are satisfied,
            including that the loan is fully collateralized. Please see
            "Investment Objectives and Policies" in the Statement of
            Additional Information for details. When the Fund lends portfolio
            securities, its investment performance will continue to reflect
            changes in the value of the securities loaned, and the Fund 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. The Fund may pay
            lending fees to a party arranging the loan.

Portfolio   The length of time the Fund has held a particular security is not
Turnover    generally a consideration in investment decisions. A change in the
            securities held by a Fund is known as "portfolio turnover." The
            Fund 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 the Fund, 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 generally taxed at ordinary income tax rates).
            The trading costs and tax effects associated with portfolio
            turnover may adversely affect the Fund's performance.

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

Changes     The investment objective of the Fund is fundamental and may not be
in          changed without shareholder approval. Unless otherwise stated, all
Investment  other investment policies of the Fund may be changed by the Board
Objectives  of Trustees without shareholder approval.
and
Policies

Percentage  Unless otherwise stated, all percentage limitations on Fund
Investment  investments listed in this Prospectus will apply at the time of
Limitations investment. The Fund would not violate these limitations unless an
            excess or deficiency occurs or exists immediately after and as a
            result of an investment.

Other       The Fund may invest in other types of securities and use a variety
Investments of investment techniques and strategies which are not described in
and         this Prospectus. These securities and techniques may subject the
Techniques  Fund 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 Fund.

                                                                   Prospectus
                                                                              17
<PAGE>

            Financial Highlights

            The financial highlights table is intended to help you understand
            the financial performance of Class A shares of the Fund since the
            class of shares was first offered. Certain information reflects
            financial results for a single Fund share. The total returns in
            the table represent the rate that an investor would have earned or
            lost on an investment in Class A shares of the Fund, assuming
            reinvestment of all dividends and distributions. This information
            has been audited by PricewaterhouseCoopers LLP, whose report,
            along with the Fund's financial statements, are included in the
            Trust's annual report to shareholders. The annual report is
            incorporated by reference in the Statement of Additional
            Information and is available free of charge upon request from the
            Distributor.

<TABLE>
<CAPTION>
                                          3/31/99      3/31/98     3/31/97(a)
- ------------------------------------------------------------------------------
<S>                                      <C>           <C>         <C>
 Net Asset Value, Beginning of Period    $    10.62    $  10.27     $  10.40
 Income from Investment Operations:
 Net Investment Income                         0.58(b)     0.58(b)      0.12
 Net Realized and Unrealized Gain on
 Investments                                   0.16(b)     0.63(b)     (0.12)
 Total Income from Investment Operations       0.74        1.21         0.00
 Less Distributions:
 Dividends from Net Investment Income         (0.58)      (0.57)       (0.13)
 Dividends in Excess of Net Investment
 Income                                        0.00       (0.02)        0.00
 Distributions from Net Realized Capital
 Gains                                        (0.24)      (0.27)        0.00
 Distributions in Excess of Net Realized
 Capital Gains                                (0.18)       0.00         0.00
 Total Distributions                          (1.00)      (0.86)       (0.13)
 Net Asset Value, End of Period          $    10.36    $  10.62     $  10.27
 Total Return (without sales charge)           7.09%      12.11%        0.02%
 Ratios/Supplemental Data:
 Net Assets, End of Period (in 000s)     $1,140,606    $533,893     $115,742
 Ratio of Expenses to Average Net Assets       0.90%       0.90%        0.91%+
 Ratio of Net Investment Income to
 Average Net Assets                            5.37%       5.46%        6.08%+
 Portfolio Turnover Rate                        154%        206%         173%
</TABLE>
- -------
(a) From commencement of operations, January 13, 1997
(b) Per share amounts based on average number of shares outstanding during the
period.
 +  Annualized

  PIMCO Funds: Pacific Investment Management Series
18
<PAGE>

            Appendix A
            Description of Securities Ratings

            A Fund's investments may range in quality from securities rated in
            the lowest category in which the Fund is 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 Fund'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 ("Junk Bonds") are
            those rated lower than Baa by Moody's or BBB by S&P and comparable
            securities. They are considered predominantly 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     Corporate and Municipal Bond Ratings
Investors
Service,     Aaa: Bonds which are rated Aaa are judged to be of the best
Inc.        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.

             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
            indicates a mid-range ranking; and the modifier 3 indicates that
            the issue ranks in the lower end of its generic rating category.

            Corporate Short-Term Debt Ratings

            Moody's short-term debt ratings are opinions of the ability 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:
                                                                   Prospectus
                                                                             A-1
<PAGE>

             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    Corporate and Municipal Bond Ratings
& Poor's
Ratings     Investment Grade
Services     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 than
            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.

             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.

A-2
  PIMCO Funds: Pacific Investment Management Series
<PAGE>

             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.

            An S&P commercial paper rating is a current assessment of the
Commercial  likelihood of timely payment of debt having an original maturity
Paper       of no more than 365 days. Ratings are graded into several
Rating      categories, ranging from A for the highest quality obligations to
Definitions 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 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 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.
                                                                   Prospectus
                                                                             A-3
<PAGE>

            PIMCO Funds: Pacific Investment Management Series

            The Trust's Statement of Additional Information ("SAI") and annual
            and semi-annual reports to shareholders include additional
            information about the Fund. The SAI and the financial statements
            included in the Fund's most recent annual report to shareholders
            are incorporated by reference into this Prospectus, which means
            they are part of this Prospectus for legal purposes. The Fund's
            annual report discusses the market conditions and investment
            strategies that significantly affected the Fund's performance
            during its last fiscal year.

            You may get free copies of any of these materials, request other
            information about the Fund, or make shareholder inquiries by
            calling 1-800-426-0107, or by writing to:

              PIMCO Funds Distributors LLC
              2187 Atlantic Street
              Stamford, Connecticut 06902

            You may review and copy information about the Trust, including its
            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
            Trust on the Commission's Web site at www.sec.gov. You may get
            copies of this information, with payment of a duplication fee, by
            writing the Public Reference Section of the Commission,
            Washington, D.C. 20549-0102, or by electronic request at public
            [email protected].

            You can also visit our Web site at www.pimcofunds.com for
            additional information about the Fund.

            [LOGO OF PIMCO FUNDS]

            Investment Company Act File no. 811-5028
<PAGE>

PIMCO Funds:        ------------------------------------------------------------
Pacific Investment  INVESTMENT ADVISOR AND ADMINISTRATOR
Management Series
                    PIMCO, 840 Newport Center Drive, Suite 300, Newport Beach,
                    CA 92660

                    ------------------------------------------------------------
                    DISTRIBUTOR

                    PIMCO Funds Distributors LLC, 2187 Atlantic Street,
                    Stamford, CT 06902-6896

                    ------------------------------------------------------------
                    CUSTODIAN

                    State Street Bank & Trust Co., 801 Pennsylvania, Kansas
                    City, MO 64105

                    ------------------------------------------------------------
                    SHAREHOLDER SERVICING AGENT AND TRANSFER AGENT

                    PFPC Inc., P.O. Box 9688, Providence, RI 02940

                    ------------------------------------------------------------
                    INDEPENDENT ACCOUNTANTS

                    PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO
                    64105

                    ------------------------------------------------------------
                    LEGAL COUNSEL

                    Dechert Price & Rhoads, 1775 Eye Street N.W., Washington,
                    D.C. 20006-2401

                    ------------------------------------------------------------
                    For further information about the PIMCO Funds, call
                    1-800-426-0107 or visit our Web site at
                    http://www.pimcofunds.com.


                    This page is not part of the Prospectus that begins on
                    page 1.
<PAGE>

                           PIMCO Funds is on the Web

                              www.pimcofunds.com

A Partial List of What's Available:

On-Line Account Access

Daily Share Prices

Daily Manager Commentary

Current and Historical Fund Performance

Lipper Rankings

Morningstar Ratings

Listing of Fund Portfolio Holdings

Risk Analysis

Fund Manager Bios

Downloadable Literature Section

On-line Requests for Literature by Mail

Resources for Investment Professionals

Through the PIMCO Funds Website, at www.pimcofunds.com, you and your financial
advisor have around-the-clock access to the most timely and comprehensive
information available on PIMCO Funds.

     In addition, the site includes daily commentary from our fund managers,
with insights on the economy and other facts affecting the stock and bond
markets.

     And now you can access your account--securely--on-line. This feature is
available to shareholders with direct accounts (a direct account is one where
the shareholder receives statements directly from PIMCO Funds.)

[GRAPHIC]

You'll find the site to be informative and easy-to-use. It's divided into three
main sections: Investment Insight, Fund Information and Resources.

Investment Insight
The Investment Insight section provides an overview of the investment management
firms under the PIMCO Advisors L.P. umbrella. You'll find an explanation of each
firm's investment process, biographies of the investment team, manager updates
and more.

Fund Information
In the Fund Information section you'll access detailed profiles of all the PIMCO
Funds, including current and historical performance, Lipper rankings and
Morningstar ratings.

     Additionally, we provide a summary of a fund's portfolio--complete with
risk analysis data. You can also obtain daily fund share prices. Please read the
relevant prospectus carefully before you invest in any PIMCO Fund.

Resources
Our Resources section features a variety of useful information, including:

 . an on-line document library with applications and prospectuses that you can
view and print

 . a lieterature-by-mail "catalog," so you can order free materials

 . information about our convenient shareholder services, such as Auto-Invest,
Fund Link and our 24-Hour Telephone Information System

 . a listing of the features and benefits of the retirement plans offered by
PIMCO Funds

Questions?
We're sure you'll find the PIMCO Funds Web site to be an invaluable tool. If you
have any questions about the site, call us at 1-800-426-0107.

     Or, send us e-mail at [email protected].

        P2007 3/00                              Not part of the Prospectus
- --------------------------------------------------------------------------------
    PIMCO
   ------
    FUNDS

PIMCO Funds
Distributors LLC

2187 Atlantic Street
Stamford, CT 06902-6896

<PAGE>



                                  PIMCO Funds:
                      Pacific Investment Management Series

                      Statement of Additional Information

     This Statement of Additional Information is not a prospectus, and should be
read in conjunction with the prospectuses of PIMCO Funds: Pacific Investment
Management Series, as supplemented from time to time.  The Trust offers up to
eight classes of shares of each of its Funds. Class A, Class B, and Class C
shares of certain Funds are offered through the "Class A, B and C Prospectus,"
Class A, B and C of the Municipal Bond Fund and Class A of the California
Intermediate Municipal Bond Fund and New York Intermediate Bond Fund are offered
through the "Municipal Bond Prospectus," Class D shares of the Funds are offered
through the "Class D Prospectus," Institutional Class and Administrative Class
shares of the Funds are offered through the "Institutional Prospectus," while
Class A shares of the Total Return Fund are offered through a separate
prospectus (each dated March 31, 2000 except for the Class D prospectus which is
dated April 5, 2000), each as amended or supplemented from time to time
(collectively, the "Prospectuses").  Additionally, Class J and Class K shares
for certain Funds are offered solely to non-U.S. investors outside the United
States.  This information does not constitute an offer of Class J shares or
Class K shares to any person who resides within the United States.

     Audited financial statements for the Trust, as of March 31, 1999, including
notes thereto, and the reports of PricewaterhouseCoopers LLP thereon, are
incorporated by reference from the Trust's March 31, 1999 Annual Reports.
Copies of Prospectuses, Annual or Semi-Annual Reports, and the PIMCO Funds
Shareholders' Guide for Class A, B and C Shares (the "Guide"), which is a part
of this Statement of Additional Information, may be obtained free of charge at
the addresses and telephone number(s) listed below.

<TABLE>
<CAPTION>
<S>                                                   <C>
                                                       Class A, B and C and Class D
      Institutional Prospectus and                     Prospectuses, Annual and
      Annual and Semi-Annual Reports:                   Semi-Annual Reports, and the Guide:

      PIMCO Funds                                      PIMCO Funds Distributors LLC
      840 Newport Center Drive                         2187 Atlantic Street
      Suite 300                                        Stamford, Connecticut 06902
      Newport Beach, California 92660                  Telephone:  (800) 426-0107
      Telephone: (800) 927-4648
</TABLE>
March 31, 2000

<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                                                Page
<S>                                                                                                             <C>

THE TRUST....................................................................................................      1

INVESTMENT OBJECTIVES AND POLICIES...........................................................................      1

     Municipal Bonds.........................................................................................      1
     Mortgage-Related and Other Asset-Backed Securities......................................................      6
     Bank Obligations........................................................................................     11
     Loan Participations.....................................................................................     11
     Corporate Debt Securities...............................................................................     13
     High Yield Securities ("Junk Bonds")....................................................................     13
     Participation on Creditors Committees...................................................................     14
     Variable and Floating Rate Securities...................................................................     14
     Inflation-Indexed Bonds.................................................................................     15
     Event-Linked Bonds......................................................................................     16
     Convertible Securities..................................................................................     16
     Warrants to Purchase Securities.........................................................................     17
     Foreign Securities......................................................................................     17
     Foreign Currency Transactions...........................................................................     19
     Foreign Currency Exchange-Related Securities............................................................     20
     Borrowing...............................................................................................     21
     Derivative Instruments..................................................................................     23
     Hybrid Instruments......................................................................................     31
     Delayed Funding Loans and Revolving Credit Facilities...................................................     31
     When-Issued, Delayed Delivery and Forward Commitment Transactions.......................................     32
     Short Sales.............................................................................................     32
     Illiquid Securities.....................................................................................     33
     Loans of Portfolio Securities...........................................................................     33
     Social Investment Policies..............................................................................     33

INVESTMENT RESTRICTIONS......................................................................................     33

     Fundamental Investment Restrictions.....................................................................     33
     Non-Fundamental Investment Restrictions.................................................................     34
     Non-Fundamental Operating Policies Relating to the Sale of
     Shares of Total Return Fund in Japan....................................................................     37

MANAGEMENT OF THE TRUST......................................................................................     38

     Trustees and Officers...................................................................................     38
     Compensation Table......................................................................................     43
     Investment Adviser......................................................................................     44
     Fund Administrator......................................................................................     47
</TABLE>
<PAGE>

                                   THE TRUST

     PIMCO Funds (the "Trust") is an open-end management investment company
("mutual fund") currently consisting of twenty-nine separate investment
portfolios (the "Funds"):

<TABLE>
<CAPTION>
<S>                                        <C>
Money Market Fund                          Long-Term U.S. Government Fund
Short-Term Fund                            Long Duration Fund
Low Duration Fund                          Global Bond Fund
Low Duration Fund II                       Global Bond Fund II
Low Duration Fund III                      Foreign Bond Fund
Low Duration Mortgage Fund                 Emerging Markets Bond Fund
Moderate Duration Fund                     Short Duration Municipal Income Fund
Real Return Bond Fund                      Municipal Bond Fund
Total Return Fund                          California Intermediate Municipal Bond Fund
Total Return Fund II                       New York Intermediate Municipal Bond Fund
Total Return Fund III                      Strategic Balanced Fund
Total Return Mortgage Fund                 Convertible Fund
Commercial Mortgage Securities Fund        StocksPLUS Fund
Investment Grade Corporate Bond Fund       StocksPLUS Short Strategy Fund
High Yield Fund
</TABLE>

                       INVESTMENT OBJECTIVES AND POLICIES

     The investment objectives and general investment policies of each Fund are
described in the Prospectuses. Additional information concerning the
characteristics of certain of the Funds' investments is set forth below.

Municipal Bonds

     Each Fund may invest in securities issued by states, municipalities and
other political subdivisions, agencies, authorities and instrumentalities of
states and multi-state agencies or authorities.  It is a policy of the Short
Duration Municipal Income, Municipal Bond, California Intermediate Municipal
Bond and New York Intermediate Municipal Bond Funds (collectively, the
"Municipal Funds") to have 80% of its net assets invested in debt obligations
the interest on which, in the opinion of bond counsel to the issuer at the time
of issuance, is exempt from federal income tax ("Municipal Bonds").  In the case
of the California Intermediate Municipal Bond and New York Intermediate
Municipal Bond Funds, the Funds will invest, under normal circumstances, at
least 65% of their net assets in debt securities whose interest is, in the
opinion of bond counsel for the issuers at the time of issuance, exempt from
federal income tax and California or New York income tax, respectively.  The
ability of the Fund to invest in securities other than Municipal Bonds is
limited by a requirement of the Internal Revenue Code that at least 50% of the
Fund's total assets be invested in Municipal Bonds at the end of each calendar
quarter.  See "Taxes."

     The PIMCO Municipal Bond Fund may, from time to time, invest more than 25%
of its assets in Municipal Bonds of issuers in California and New York, and, if
so, will be subject to the California and New York state-specific risks
discussed in the "Summary of Risks" section of the Prospectus and in this
"Municipal Bonds" section of this Statement of Additional Information, but
neither Fund has any present intention to invest more than that amount in a
particular state.

     Municipal Bonds share the attributes of debt/fixed income securities in
general, but are generally issued by states, municipalities and other political
subdivisions, agencies, authorities and instrumentalities of states and multi-
state agencies or authorities.   Specifically, California and New York Municipal
Bonds generally are issued by or on behalf of the State of California and New
York, respectively, and their political subdivisions and financing authorities,
and local governments.  The Municipal Bonds which the Municipal Funds may
purchase include general obligation bonds and limited obligation bonds (or
revenue

                                       1
<PAGE>

bonds), including industrial development bonds issued pursuant to former
federal tax law.  General obligation bonds are obligations involving the credit
of an issuer possessing taxing power and are payable from such issuer's general
revenues and not from any particular source.  Limited obligation bonds are
payable only from the revenues derived from a particular facility or class of
facilities or, in some cases, from the proceeds of a special excise or other
specific revenue source.  Tax-exempt private activity bonds and industrial
development bonds generally are also revenue bonds and thus are not payable from
the issuer's general revenues.  The credit and quality of private activity bonds
and industrial development bonds are usually related to the credit of the
corporate user of the facilities.  Payment of interest on and repayment of
principal of such bonds is the responsibility of the corporate user (and/or any
guarantor).

     Under the Internal Revenue Code, certain limited obligation bonds are
considered "private activity bonds" and interest paid on such bonds is treated
as an item of tax preference for purposes of calculating federal alternative
minimum tax liability.

     The Municipal Funds may invest in municipal lease obligations.  A lease is
not a full faith and credit obligation of the issuer and is usually backed only
by the borrowing government's unsecured pledge to make annual appropriations for
lease payments.  There have been challenges to the legality of lease financing
in numerous states, and, from time to time, certain municipalities have
considered not appropriating money for lease payments.  In deciding whether to
purchase a lease obligation, the Municipal Funds will assess the financial
condition of the borrower, the merits of the project, the level of public
support for the project, and the legislative history of lease financing in the
state.  These securities may be less readily marketable than other municipals.
A Municipal Fund may also purchase unrated lease obligations if determined by
PIMCO to be of comparable quality to rated securities in which the Fund is
permitted to invest.

     The Municipal Funds may seek to enhance their yield through the purchase of
private placements.  These securities are sold through private negotiations,
usually to institutions or mutual funds, and may have resale restrictions.
Their yields are usually higher than comparable public securities to compensate
the investor for their limited marketability.  A Municipal Fund may not invest
more than 15% of its net assets in illiquid securities, including unmarketable
private placements.

     Some longer-term Municipal Bonds give the investor the right to "put" or
sell the security at par (face value) within a specified number of days
following the investor's request - usually one to seven days. This demand
feature enhances a security's liquidity by shortening its effective maturity and
enables it to trade at a price equal to or very close to par. If a demand
feature terminates prior to being exercised, a Municipal Fund would hold the
longer-term security, which could experience substantially more volatility.

     The Municipal Funds may invest in municipal warrants, which are essentially
call options on Municipal Bonds. In exchange for a premium, they give the
purchaser the right, but not the obligation, to purchase a Municipal Bond in the
future. A Municipal Fund might purchase a warrant to lock in forward supply in
an environment where the current issuance of bonds is sharply reduced. Like
options, warrants may expire worthless and they may have reduced liquidity.  A
Municipal Fund will not invest more than 5% of its net assets in municipal
warrants.

     The Municipal Funds may invest in Municipal Bonds with credit enhancements
such as letters of credit, municipal bond insurance and Standby Bond Purchase
Agreements ("SBPAs").  Letters of credit that are issued by a third party,
usually a bank, to enhance liquidity and ensure repayment of principal and any
accrued interest if the underlying Municipal Bond should default.  Municipal
bond insurance, which is usually purchased by the bond issuer from a private,
nongovernmental insurance company, provides an unconditional and irrevocable
guarantee that the insured bond's principal and interest will be paid when due.
Insurance does not guarantee the price of the bond or the share price of any
fund. The credit rating of an insured bond reflects the credit rating of the
insurer, based on its claims-paying ability. The obligation of a municipal bond
insurance company to pay a claim extends over the life of each insured bond.

                                       2
<PAGE>

Although defaults on insured Municipal Bonds have been low to date and municipal
bond insurers have met their claims, there is no assurance this will continue. A
higher-than-expected default rate could strain the insurer's loss reserves and
adversely affect its ability to pay claims to bondholders. The number of
municipal bond insurers is relatively small, and not all of them have the
highest rating. An SBPA is a liquidity facility provided to pay the purchase
price of bonds that cannot be re-marketed. The obligation of the liquidity
provider (usually a bank) is only to advance funds to purchase tendered bonds
that cannot be remarketed and does not cover principal or interest under any
other circumstances. The liquidity provider's obligations under the SBPA are
usually subject to numerous conditions, including the continued creditworthiness
of the underlying borrower.

     The Municipal Funds may invest in Residual Interest Bonds, which are
created by dividing the income stream provided by an underlying bond to create
two securities, one short term and one long term. The interest rate on the
short-term component is reset by an index or auction process normally every
seven to 35 days. After income is paid on the short-term securities at current
rates, the residual income goes to the long-term securities. Therefore, rising
short-term interest rates result in lower income for the longer-term portion,
and vice versa. The longer-term bonds can be very volatile and may be less
liquid than other Municipal Bonds of comparable maturity.  A Municipal Fund will
not invest more than 10% of its total assets in Residual Interest Bonds.

     The Municipal Funds also may invest in participation interests.
Participation interests are various types of securities created by converting
fixed rate bonds into short-term, variable rate certificates. These securities
have been developed in the secondary market to meet the demand for short-term,
tax-exempt securities. The Municipal Funds will invest only in securities deemed
tax-exempt by a nationally recognized bond counsel, but there is no guarantee
the interest will be exempt because the IRS has not issued a definitive ruling
on the matter.

     Municipal Bonds are subject to credit and market risk.  Generally, prices
of higher quality issues tend to fluctuate less with changes in market interest
rates than prices of lower quality issues and prices of longer maturity issues
tend to fluctuate more than prices of shorter maturity issues.

     The Municipal Funds may purchase and sell portfolio investments to take
advantage of changes or anticipated changes in yield relationships, markets or
economic conditions.  The Municipal Funds may also sell Municipal Bonds due to
changes in PIMCO's evaluation of the issuer or cash needs resulting from
redemption requests for Fund shares.  The secondary market for Municipal Bonds
typically has been less liquid than that for taxable debt/fixed income
securities, and this may affect the Fund's ability to sell particular Municipal
Bonds at then-current market prices, especially in periods when other investors
are attempting to sell the same securities.

     Prices and yields on Municipal Bonds are dependent on a variety of factors,
including general money- market conditions, the financial condition of the
issuer, general conditions of the Municipal Bond market, the size of a
particular offering, the maturity of the obligation and the rating of the issue.
A number of these factors, including the ratings of particular issues, are
subject to change from time to time. Information about the financial condition
of an issuer of Municipal Bonds may not be as extensive as that which is made
available by corporations whose securities are publicly traded.

     Obligations of issuers of Municipal Bonds are subject to the provisions of
bankruptcy, insolvency and other laws, such as the Federal Bankruptcy Reform Act
of 1978, affecting the rights and remedies of creditors. Congress or state
legislatures may seek to extend the time for payment of principal or interest,
or both, or to impose other constraints upon enforcement of such obligations.
There is also the possibility that as a result of litigation or other
conditions, the power or ability of issuers to meet their obligations for the
payment of interest and principal on their Municipal Bonds may be materially
affected or their obligations may be found to be invalid or unenforceable.  Such
litigation or conditions may from time to time have the effect of introducing
uncertainties in the market for Municipal Bonds or certain segments thereof, or
of materially affecting the credit risk with respect to particular bonds.
Adverse economic,

                                       3
<PAGE>

business, legal or political developments might affect all or a substantial
portion of a Fund's Municipal Bonds in the same manner. In particular, the
California and New York Intermediate Municipal Bond Funds are subject to the
risks inherent in concentrating investment in a particular state or region. The
following summarizes information drawn from official statements, and other
public documents available relating to issues potentially affecting securities
offerings of the states of California and New York. PIMCO has not independently
verified the information, but has no reason to believe that it is not correct.

     California.  The California Intermediate Municipal Bond Fund may be
particularly affected by political, economic or regulatory developments
affecting the ability of California issuers to pay interest or repay principal.
Provisions of the California Constitution and State statutes which limit the
taxing and spending authority of California governmental entities may impair the
ability of California issuers to maintain debt service on their obligations.
Future California political and economic developments, constitutional
amendments, legislative measures, executive orders, administrative regulations,
litigation and voter initiatives could have an adverse effect on the debt
obligations of California issuers.

     Certain debt obligations held by the California Intermediate Municipal Bond
Fund may be obligations of issuers which rely in whole or in substantial part on
California state revenues for the continuance of their operations and payment of
their obligations.  Whether and to what extent the California Legislature will
continue to appropriate a portion of the State's General Fund to counties,
cities and their various entities, is not entirely certain.  To the extent local
entities do not receive money from the State to pay for their operations and
services, their ability to pay debt service on obligations held by the
California Intermediate Municipal Bond Fund may be impaired.

     Certain tax-exempt securities in which the California Intermediate
Municipal Bond Fund may invest may be obligations payable solely from the
revenues of specific institutions, or may be secured by specific properties,
which are subject to provisions of California law which could adversely affect
the holders of such obligations. For example, the revenues of California health
care institutions may be subject to state laws, and California law limits the
remedies of a creditor secured by a mortgage or deed of trust on real property.

     California is the most populous state in the nation with a total population
estimated at 32.9 million. The State now comprises 12.3% of the nation's
population and 12.5% of its total personal income. Its economy is broad and
diversified with major concentrations in high technology research and
manufacturing, aerospace and defense-related manufacturing, trade,
entertainment, real estate, and financial services. After experiencing strong
growth throughout much of the 1980s, from 1990-1993 the State suffered through a
severe recession, the worst since the 1930's, heavily influenced by large
cutbacks in defense/aerospace industries and military base closures and a major
drop in real estate construction. California's economy has been recovering and
growing steadily stronger since the start of 1994, to the point where the
State's economic growth is outpacing the rest of the nation. The unemployment
rate, while still higher than the national average, fell to an average of 5.9%
in 1998, compared to over 10% at the worst of the recession. California's
economic recovery from the recession is continuing at a strong pace. Recent
economic reports indicate that, while the rate of economic growth in California
is expected to moderate over the next year, the increases in employment and
income may exceed those of the nation as a whole. The unsettled financial
situation occurring in certain Asian economies, and its spillover effect
elsewhere, may adversely affect the State's export-related industries and,
therefore, the State's rate of economic growth.

     Revenue bonds represent both obligations payable from State revenue-
producing enterprises and projects, which are not payable from the General Fund,
and conduit obligations payable only from revenues paid by private users of
facilities financed by such revenue bonds. Such enterprises and projects include
transportation projects, various public works and exposition projects,
educational facilities (including the California State University and University
of California systems), housing, health facilities, and pollution control
facilities.

                                       4
<PAGE>

     In years past, because of the State's budget problems, the State's General
Obligation bonds were downgraded. In 1996, however, citing California's
improving economy and budget situation, Fitch and S&P raised their ratings from
A to A+. In October, 1997, Fitch raised its rating from A+ to AA-referring to
the State's fundamental strengths, the extent of its economic recovery and the
return of financial stability. In October 1998, Moody's raised its rating from
A1 to Aa3 citing the State's continuing economic recovery and a number of
actions taken to improve the State's credit condition, including the rebuilding
of cash and budget reserves. There is no assurance that a particular rating will
continue for any given period of time or that any such rating will not be
revised downward or withdrawn entirely if, in the judgment of the agency
originally establishing the rating, circumstances so warrant. A downward
revision or withdrawal of such ratings, or either of them, may have an effect on
the market price of the State Municipal Obligations in which the California
Intermediate Municipal Bond Fund invests.

     The State is party to numerous legal proceedings, many of which normally
occur in governmental operations and which, if decided against the State, might
require the State to make significant future expenditures or impair future
revenue sources.

     Constitutional and statutory amendments as well as budget developments may
affect the ability of California issuers to pay interest and principal on their
obligations.  The overall effect may depend upon whether a particular California
tax-exempt security is a general or limited obligation bond and on the type of
security provided for the bond.  It is possible that other measures affecting
the taxing or spending authority of California or its political subdivisions may
be approved or enacted in the future.

     New York.  Because the New York Intermediate Municipal Bond Fund
concentrates its investments in New York tax-exempt bonds, the Fund may be
affected significantly by economic or regulatory developments affecting the
ability of New York tax-exempt issuers to pay interest or repay principal.
Investors should be aware that certain issuers of New York tax-exempt securities
have experienced serious financial difficulties in recent years.  A reoccurrence
of these difficulties may impair the ability of certain New York issuers to
maintain debt service on their obligations.

     The economic and financial condition of the State also may be affected by
various financial, social, economic and political factors.  Such factors can be
very complex, may vary from year to year and are frequently the result of
actions taken not only by the State and its agencies and instrumentalities, but
also by entities, such as the Federal government, that are not under the control
of the State.

     The fiscal stability of New York State is related to the fiscal stability
of the State's municipalities, its agencies and authorities (which generally
finance, construct and operate revenue-producing public benefit facilities).
This is due in part to the fact that agencies, authorities and local governments
in financial trouble often seek State financial assistance.  The experience has
been that if New York City or any of the agencies or authorities suffers serious
financial difficulty, both the ability of the State, the City, the State's
political subdivisions, the agencies and the authorities to obtain financing in
the public credit markets and the market price of outstanding New York tax-
exempt securities are adversely affected.

     The New York state economy has continued to expand, but growth remains
somewhat slower than in the nation overall.  Although the State has added
approximately 400,000 jobs since late 1992, employment growth in the State has
been hindered during recent years by significant cutbacks in the computer and
instrument manufacturing, utility, defense and banking industries.

     In recent years, State actions affecting the level of receipts and
disbursements, the relative strength of the State and regional economy and
actions of the federal government have helped to create projected  budget gaps
for the State.  These gaps result from a significant disparity between recurring
revenues and the costs of maintaining or increasing the level of support for
State programs.  To address a potential imbalance in any given fiscal year, the
State would be required to take actions to increase receipts and/or reduce
disbursements as it enacts the budget for that year, and under the State

                                       5
<PAGE>

Constitution, the Governor is required to propose a balanced budget each year.
There can be no assurance, however, that the Legislature will enact the
Governor's proposals or that the State's actions will be sufficient to preserve
budgetary balance in a given fiscal year or to align recurring receipts and
disbursements in future fiscal years.

     The fiscal stability of the State is related to the fiscal stability of its
public authorities.  Authorities have various responsibilities, including those
which finance, construct and/or operate revenue-producing public facilities.
Authorities are not subject to the constitutional restrictions on the incurrence
of debt which apply to the State itself, and may issue bonds and notes within
the amounts and restrictions set forth in their legislative authorization.

     Authorities are generally supported by revenues generated by the projects
financed or operated, such as tolls charged for use of highways, bridges or
tunnels, charges for electric power, electric and gas utility services, rentals
charged for housing units and charges for occupancy at medical care facilities.
In addition, State legislation authorizes several financing techniques for
authorities.  Also, there are statutory arrangements providing for State local
assistance payments otherwise payable to localities to be made under certain
circumstances to authorities.  Although the State has no obligation to provide
additional assistance to localities whose local assistance payments have been
paid to authorities under these arrangements, if local assistance payments are
diverted the affected localities could seek additional State assistance.  Some
authorities also receive moneys from State appropriations to pay for the
operating costs of certain of their programs.

     S&P rates the State's general obligation bonds A, and Moody's rates the
State's general obligation bonds A2.  There is no assurance that a particular
rating will continue for any given period of time or that any such rating will
not be revised downward or withdrawn entirely if, in the judgment of the agency
originally establishing the rating, circumstances so warrant.  A downward
revision or withdrawal of such ratings, or either of them, may have an effect on
the market price of the State Municipal Obligations in which the New York
Intermediate Bond Fund invests.

     Over the long term, the State and New York City face potential economic
problems.  New York City accounts for a large portion of the State's population
and personal income, and New York City's financial health affects the State in
numerous ways.  New York City continues to require significant financial
assistance from the State.  New York  City depends on State aid both to enable
it to balance its budget and to meet its cash requirements.  The State could
also be affected by the ability of the City to market its securities
successfully in the public credit markets.

     Each Fund may purchase custodial receipts representing the right to receive
either the principal amount or the periodic interest payments or both with
respect to specific underlying Municipal Bonds.  In a typical custodial receipt
arrangement, an issuer or third party owner of Municipal Bonds deposits the
bonds with a custodian in exchange for two classes of custodial receipts.  The
two classes have different characteristics, but, in each case, payments on the
two classes are based on payments received on the underlying Municipal Bonds.
In no event will the aggregate interest paid with respect to the two classes
exceed the interest paid by the underlying Municipal Bond.  Custodial receipts
are sold in private placements.   The value of a custodial receipt may fluctuate
more than the value of a Municipal Bond of comparable quality and maturity.

Mortgage-Related and Other Asset-Backed Securities

     Mortgage-related securities are interests in pools of residential or
commercial mortgage loans, including mortgage loans made by savings and loan
institutions, mortgage bankers, commercial banks and others.  Pools of mortgage
loans are assembled as securities for sale to investors by various governmental,
government-related and private organizations.  See "Mortgage Pass-Through
Securities."  Certain of the Funds may also invest in debt securities which are
secured with collateral consisting of

                                       6
<PAGE>

mortgage-related securities (see "Collateralized Mortgage Obligations"), and in
other types of mortgage-related securities.

     Mortgage Pass-Through Securities.  Interests in pools of mortgage-related
securities differ from other forms of debt securities, which normally provide
for periodic payment of interest in fixed amounts with principal payments at
maturity or specified call dates.  Instead, these securities provide a monthly
payment which consists of both interest and principal payments.  In effect,
these payments are a "pass-through" of the monthly payments made by the
individual borrowers on their residential or commercial mortgage loans, net of
any fees paid to the issuer or guarantor of such securities.  Additional
payments are caused by repayments of principal resulting from the sale of the
underlying property, refinancing or foreclosure, net of fees or costs which may
be incurred. Some mortgage-related securities (such as securities issued by
GNMA) are described as "modified pass-through."  These securities entitle the
holder to receive all interest and principal payments owed on the mortgage pool,
net of certain fees, at the scheduled payment dates regardless of whether or not
the mortgagor actually makes the payment.

     The rate of prepayments on underlying mortgages will affect the price and
volatility of a mortgage-related security, and may have the effect of shortening
or extending the effective maturity of the security beyond what was anticipated
at the time of purchase.  To the extent that unanticipated rates of prepayment
on underlying mortgages increase in the effective maturity of a mortgage-related
security, the volatility of such security can be expected to increase.

     The principal governmental guarantor of mortgage-related securities is
GNMA.  GNMA is a wholly owned United States Government corporation within the
Department of Housing and Urban Development. GNMA is authorized to guarantee,
with the full faith and credit of the United States Government, the timely
payment of principal and interest on securities issued by institutions approved
by GNMA (such as savings and loan institutions, commercial banks and mortgage
bankers) and backed by pools of mortgages insured by the Federal Housing
Administration (the "FHA"), or guaranteed by the Department of Veterans Affairs
(the "VA").

     Government-related guarantors (i.e., not backed by the full faith and
credit of the United States Government) include the Federal National Mortgage
Association ("FNMA") and the Federal Home Loan Mortgage Corporation ("FHLMC").
FNMA is a government-sponsored corporation owned entirely by private
stockholders.  It is subject to general regulation by the Secretary of Housing
and Urban Development.  FNMA purchases conventional (i.e., not insured or
guaranteed by any government agency) residential mortgages from a list of
approved seller/servicers which include state and federally chartered savings
and loan associations, mutual savings banks, commercial banks and credit unions
and mortgage bankers.  Pass-through securities issued by FNMA are guaranteed as
to timely payment of principal and interest by FNMA but are not backed by the
full faith and credit of the United States Government.  FHLMC was created by
Congress in 1970 for the purpose of increasing the availability of mortgage
credit for residential housing.  It is a government-sponsored corporation
formerly owned by the twelve Federal Home Loan Banks and now owned entirely by
private stockholders.  FHLMC issues Participation Certificates ("PCs") which
represent interests in conventional mortgages from FHLMC's national portfolio.
FHLMC guarantees the timely payment of interest and ultimate collection of
principal, but PCs are not backed by the full faith and credit of the United
States Government.

     Commercial banks, savings and loan institutions, private mortgage insurance
companies, mortgage bankers and other secondary market issuers also create pass-
through pools of conventional residential mortgage loans.  Such issuers may, in
addition, be the originators and/or servicers of the underlying mortgage loans
as well as the guarantors of the mortgage-related securities.  Pools created by
such non-governmental issuers generally offer a higher rate of interest than
government and government-related pools because there are no direct or indirect
government or agency guarantees of payments in the former pools. However, timely
payment of interest and principal of these pools may be supported by various
forms of insurance or guarantees, including individual loan, title, pool and
hazard insurance and letters of credit, which may be issued by governmental
entities, private insurers or the mortgage poolers.

                                       7
<PAGE>

The insurance and guarantees are issued by governmental entities, private
insurers and the mortgage poolers. Such insurance and guarantees and the
creditworthiness of the issuers thereof will be considered in determining
whether a mortgage-related security meets the Trust's investment quality
standards. There can be no assurance that the private insurers or guarantors can
meet their obligations under the insurance policies or guarantee arrangements.
The Funds may buy mortgage-related securities without insurance or guarantees
if, through an examination of the loan experience and practices of the
originator/servicers and poolers, PIMCO determines that the securities meet the
Trust's quality standards. Although the market for such securities is becoming
increasingly liquid, securities issued by certain private organizations may not
be readily marketable. No Fund will purchase mortgage-related securities or any
other assets which in PIMCO's opinion are illiquid if, as a result, more than
15% of the value of the Fund's net assets will be illiquid (10% in the case of
the Money Market Fund.)

     Mortgage-backed securities that are issued or guaranteed by the U.S.
Government, its agencies or instrumentalities, are not subject to the Funds'
industry concentration restrictions, set forth below under "Investment
Restrictions," by virtue of the exclusion from that test available to all U.S.
Government securities.  In the case of privately issued mortgage-related
securities, the Funds take the position that mortgage-related securities do not
represent interests in any particular "industry" or group of industries. The
assets underlying such securities may be represented by a portfolio of first
lien residential mortgages (including both whole mortgage loans and mortgage
participation interests) or portfolios of mortgage pass-through securities
issued or guaranteed by GNMA, FNMA or FHLMC.  Mortgage loans underlying a
mortgage-related security may in turn be insured or guaranteed by the FHA or the
VA.  In the case of private issue mortgage-related securities whose underlying
assets are neither U.S. Government securities nor U.S. Government-insured
mortgages, to the extent that real properties securing such assets may be
located in the same geographical region, the security may be subject to a
greater risk of default than other comparable securities in the event of adverse
economic, political or business developments that may affect such region and,
ultimately, the ability of residential homeowners to make payments of principal
and interest on the underlying mortgages.

     Collateralized Mortgage Obligations (CMOs).  A CMO is a hybrid between a
mortgage-backed bond and a mortgage pass-through security.  Similar to a bond,
interest and prepaid principal is paid, in most cases, on a monthly basis.  CMOs
may be collateralized by whole mortgage loans, but are more typically
collateralized by portfolios of mortgage pass-through securities guaranteed by
GNMA, FHLMC, or FNMA, and their income streams.

     CMOs are structured into multiple classes, each bearing a different stated
maturity.  Actual maturity and average life will depend upon the prepayment
experience of the collateral.  CMOs provide for a modified form of call
protection through a de facto breakdown of the underlying pool of mortgages
according to how quickly the loans are repaid.  Monthly payment of principal
received from the pool of underlying mortgages, including prepayments, is first
returned to investors holding the shortest maturity class.  Investors holding
the longer maturity classes receive principal only after the first class has
been retired.  An investor is partially guarded against a sooner than desired
return of principal because of the sequential payments.

     In a typical CMO transaction, a corporation ("issuer") issues multiple
series (e.g., A, B, C, Z) of CMO bonds ("Bonds").  Proceeds of the Bond offering
are used to purchase mortgages or mortgage pass-through certificates
("Collateral").  The Collateral is pledged to a third party trustee as security
for the Bonds.  Principal and interest payments from the Collateral are used to
pay principal on the Bonds in the order A, B, C, Z.  The Series A, B, and C
Bonds all bear current interest.  Interest on the Series Z Bond is accrued and
added to principal and a like amount is paid as principal on the Series A, B, or
C Bond currently being paid off.  When the Series A, B, and C Bonds are paid in
full, interest and principal on the Series Z Bond begins to be paid currently.
With some CMOs, the issuer serves as a conduit to allow loan originators
(primarily builders or savings and loan associations) to borrow against their
loan portfolios.

                                       8
<PAGE>

     FHLMC Collateralized Mortgage Obligations.  FHLMC CMOs are debt obligations
of FHLMC issued in multiple classes having different maturity dates which are
secured by the pledge of a pool of conventional mortgage loans purchased by
FHLMC.  Unlike FHLMC PCs, payments of principal and interest on the CMOs are
made semi-annually, as opposed to monthly.  The amount of principal payable on
each semiannual payment date is determined in accordance with FHLMC's mandatory
sinking fund schedule, which, in turn, is equal to approximately 100% of FHA
prepayment experience applied to the mortgage collateral pool.  All sinking fund
payments in the CMOs are allocated to the retirement of the individual classes
of bonds in the order of their stated maturities.  Payment of principal on the
mortgage loans in the collateral pool in excess of the amount of FHLMC's minimum
sinking fund obligation for any payment date are paid to the holders of the CMOs
as additional sinking fund payments.  Because of the "pass-through" nature of
all principal payments received on the collateral pool in excess of FHLMC's
minimum sinking fund requirement, the rate at which principal of the CMOs is
actually repaid is likely to be such that each class of bonds will be retired in
advance of its scheduled maturity date.

     If collection of principal (including prepayments) on the mortgage loans
during any semi-annual payment period is not sufficient to meet FHLMC's minimum
sinking fund obligation on the next sinking fund payment date, FHLMC agrees to
make up the deficiency from its general funds.

     Criteria for the mortgage loans in the pool backing the FHLMC CMOs are
identical to those of FHLMC PCs.  FHLMC has the right to substitute collateral
in the event of delinquencies and/or defaults.

     Commercial Mortgage-Backed Securities include securities that reflect an
interest in, and are secured by, mortgage loans on commercial real property.
The market for commercial mortgage-backed securities developed more recently and
in terms of total outstanding principal amount of issues is relatively small
compared to the market for residential single-family mortgage-backed securities.
Many of the risks of investing in commercial mortgage-backed securities reflect
the risks of investing in the real estate securing the underlying mortgage
loans. These risks reflect the effects of local and other economic conditions on
real estate markets, the ability of tenants to make loan payments, and the
ability of a property to attract and retain tenants.  Commercial mortgage-backed
securities may be less liquid and exhibit greater price volatility than other
types of mortgage- or asset-backed securities.

     Other Mortgage-Related Securities.  Other mortgage-related securities
include securities other than those described above that directly or indirectly
represent a participation in, or are secured by and payable from, mortgage loans
on real property, including mortgage dollar rolls, CMO residuals or stripped
mortgage-backed securities ("SMBS"). Other mortgage-related securities may be
equity or debt securities issued by agencies or instrumentalities of the U.S.
Government or by private originators of, or investors in, mortgage loans,
including savings and loan associations, homebuilders, mortgage banks,
commercial banks, investment banks, partnerships, trusts and special purpose
entities of the foregoing.

     CMO Residuals.  CMO residuals are mortgage securities issued by agencies or
instrumentalities of the U.S. Government or by private originators of, or
investors in, mortgage loans, including savings and loan associations,
homebuilders, mortgage banks, commercial banks, investment banks and special
purpose entities of the foregoing.

     The cash flow generated by the mortgage assets underlying a series of CMOs
is applied first to make required payments of principal and interest on the CMOs
and second to pay the related administrative expenses of the issuer.  The
residual in a CMO structure generally represents the interest in any excess cash
flow remaining after making the foregoing payments.  Each payment of such excess
cash flow to a holder of the related CMO residual represents income and/or a
return of capital.  The amount of residual cash flow resulting from a CMO will
depend on, among other things, the characteristics of the mortgage assets, the
coupon rate of each class of CMO, prevailing interest rates, the amount of
administrative expenses and the prepayment experience on the mortgage assets.
In particular, the yield to maturity on CMO residuals is extremely sensitive to
prepayments on the related underlying mortgage assets, in the same manner as an
interest-only ("IO") class of stripped mortgage-backed securities.  See

                                       9
<PAGE>

"Other Mortgage-Related Securities--Stripped Mortgage-Backed Securities." In
addition, if a series of a CMO includes a class that bears interest at an
adjustable rate, the yield to maturity on the related CMO residual will also be
extremely sensitive to changes in the level of the index upon which interest
rate adjustments are based. As described below with respect to stripped
mortgage-backed securities, in certain circumstances a Fund may fail to recoup
fully its initial investment in a CMO residual.

     CMO residuals are generally purchased and sold by institutional investors
through several investment banking firms acting as brokers or dealers.  The CMO
residual market has only very recently developed and CMO residuals currently may
not have the liquidity of other more established securities trading in other
markets. Transactions in CMO residuals are generally completed only after
careful review of the characteristics of the securities in question.  In
addition, CMO residuals may, or pursuant to an exemption therefrom, may not have
been registered under the Securities Act of 1933, as amended (the "1933 Act").
CMO residuals, whether or not registered under the 1933 Act, may be subject to
certain restrictions on transferability, and may be deemed "illiquid" and
subject to a Fund's limitations on investment in illiquid securities.

     Stripped Mortgage-Backed Securities.  SMBS are derivative multi-class
mortgage securities.  SMBS may be issued by agencies or instrumentalities of the
U.S. Government, or by private originators of, or investors in, mortgage loans,
including savings and loan associations, mortgage banks, commercial banks,
investment banks and special purpose entities of the foregoing.

     SMBS are usually structured with two classes that receive different
proportions of the interest and principal distributions on a pool of mortgage
assets.  A common type of SMBS will have one class receiving some of the
interest and most of the principal from the mortgage assets, while the other
class will receive most of the interest and the remainder of the principal.  In
the most extreme case, one class will receive all of the interest (the "IO"
class), while the other class will receive all of the principal (the principal-
only or "PO" class).  The yield to maturity on an IO class is extremely
sensitive to the rate of principal payments (including prepayments) on the
related underlying mortgage assets, and a rapid rate of principal payments may
have a material adverse effect on a Fund's yield to maturity from these
securities. If the underlying mortgage assets experience greater than
anticipated prepayments of principal, a Fund may fail to recoup some or all of
its initial investment in these securities even if the security is in one of the
highest rating categories.

     Although SMBS are purchased and sold by institutional investors through
several investment banking firms acting as brokers or dealers, these securities
were only recently developed.  As a result, established trading markets have not
yet developed and, accordingly, these securities may be deemed "illiquid" and
subject to a Fund's limitations on investment in illiquid securities.

     Other Asset-Backed Securities.  Similarly, PIMCO expects that other asset-
backed securities (unrelated to mortgage loans) will be offered to investors in
the future.  Several types of asset-backed securities have already been offered
to investors, including Certificates for Automobile ReceivablesSM ("CARSSM").
CARSSM represent undivided fractional interests in a trust whose assets consist
of a pool of motor vehicle retail installment sales contracts and security
interests in the vehicles securing the contracts. Payments of principal and
interest on CARSSM are passed through monthly to certificate holders, and are
guaranteed up to certain amounts and for a certain time period by a letter of
credit issued by a financial institution unaffiliated with the trustee or
originator of the trust.  An investor's return on CARSSM may be affected by
early prepayment of principal on the underlying vehicle sales contracts.  If the
letter of credit is exhausted, the trust may be prevented from realizing the
full amount due on a sales contract because of state law requirements and
restrictions relating to foreclosure sales of vehicles and the obtaining of
deficiency judgments following such sales or because of depreciation, damage or
loss of a vehicle, the application of federal and state bankruptcy and
insolvency laws, or other factors.  As a result, certificate holders may
experience delays in payments or losses if the letter of credit is exhausted.

                                       10
<PAGE>

     Consistent with a Fund's investment objectives and policies, PIMCO also may
invest in other types of asset-backed securities.

Bank Obligations

     Bank obligations in which the Funds may invest include certificates of
deposit, bankers' acceptances, and fixed time deposits.  Certificates of deposit
are negotiable certificates issued against funds deposited in a commercial bank
for a definite period of time and earning a specified return.  Bankers'
acceptances are negotiable drafts or bills of exchange, normally drawn by an
importer or exporter to pay for specific merchandise, which are "accepted" by a
bank, meaning, in effect, that the bank unconditionally agrees to pay the face
value of the instrument on maturity. Fixed time deposits are bank obligations
payable at a stated maturity date and bearing interest at a fixed rate.  Fixed
time deposits may be withdrawn on demand by the investor, but may be subject to
early withdrawal penalties which vary depending upon market conditions and the
remaining maturity of the obligation.  There are no contractual restrictions on
the right to transfer a beneficial interest in a fixed time deposit to a third
party, although there is no market for such deposits. A Fund will not invest in
fixed time deposits which (1) are not subject to prepayment or (2) provide for
withdrawal penalties upon prepayment (other than overnight deposits) if, in the
aggregate, more than 15% of its net assets (10% in the case of the Money Market
Fund) would be invested in such deposits, repurchase agreements maturing in more
than seven days and other illiquid assets.

     The Money Market, Low Duration II, Low Duration Mortgage, Total Return II,
Total Return Mortgage, Commercial Mortgage Securities, Long-Term U.S.
Government, Short Duration Municipal Income, Municipal Bond, California
Intermediate Municipal Bond, and New York Intermediate Municipal Bond Funds may
invest in the same types of bank obligations as the other Funds, but they must
be U.S. dollar-denominated.  Subject to the Trust's limitation on concentration
of no more than 25% of its assets in the securities of issuers in a particular
industry, there is no limitation on the amount of a Fund's assets which may be
invested in obligations of foreign banks which meet the conditions set forth
herein.

     Obligations of foreign banks involve somewhat different investment risks
than those affecting obligations of United States banks, including the
possibilities that their liquidity could be impaired because of future political
and economic developments, that their obligations may be less marketable than
comparable obligations of United States banks, that a foreign jurisdiction might
impose withholding taxes on interest income payable on those obligations, that
foreign deposits may be seized or nationalized, that foreign governmental
restrictions such as exchange controls may be adopted which might adversely
affect the payment of principal and interest on those obligations and that the
selection of those obligations may be more difficult because there may be less
publicly available information concerning foreign banks or the accounting,
auditing and financial reporting standards, practices and requirements
applicable to foreign banks may differ from those applicable to United States
banks.  Foreign banks are not generally subject to examination by any U.S.
Government agency or instrumentality.

Loan Participations

     Each Fund may purchase participations in commercial loans. Such
indebtedness may be secured or unsecured.  Loan participations typically
represent direct participation in a loan to a corporate borrower, and generally
are offered by banks or other financial institutions or lending syndicates.  The
Funds may participate in such syndications, or can buy part of a loan, becoming
a part lender.  When purchasing loan participations, a Fund assumes the credit
risk associated with the corporate borrower and may assume the credit risk
associated with an interposed bank or other financial intermediary.  The
participation interests in which a Fund intends to invest may not be rated by
any nationally recognized rating service.

     A loan is often administered by an agent bank acting as agent for all
holders.  The agent bank administers the terms of the loan, as specified in the
loan agreement.  In addition, the agent bank is

                                       11
<PAGE>

normally responsible for the collection of principal and interest payments from
the corporate borrower and the apportionment of these payments to the credit of
all institutions which are parties to the loan agreement. Unless, under the
terms of the loan or other indebtedness, a Fund has direct recourse against the
corporate borrower, the Fund may have to rely on the agent bank or other
financial intermediary to apply appropriate credit remedies against a corporate
borrower.

     A financial institution's employment as agent bank might be terminated in
the event that it fails to observe a requisite standard of care or becomes
insolvent.  A successor agent bank would generally be appointed to replace the
terminated agent bank, and assets held by the agent bank under the loan
agreement should remain available to holders of such indebtedness.  However, if
assets held by the agent bank for the benefit of a Fund were determined to be
subject to the claims of the agent bank's general creditors, the Fund might
incur certain costs and delays in realizing payment on a loan or loan
participation and could suffer a loss of principal and/or interest.  In
situations involving other interposed financial institutions (e.g., an insurance
company or governmental agency) similar risks may arise.

     Purchasers of loans and other forms of direct indebtedness depend primarily
upon the creditworthiness of the corporate borrower for payment of principal and
interest.  If a Fund does not receive scheduled interest or principal payments
on such indebtedness, the Fund's share price and yield could be adversely
affected.  Loans that are fully secured offer a Fund more protection than an
unsecured loan in the event of non-payment of scheduled interest or principal.
However, there is no assurance that the liquidation of collateral from a secured
loan would satisfy the corporate borrower's obligation, or that the collateral
can be liquidated.

     The Funds may invest in loan participations with credit quality comparable
to that of issuers of its securities investments.  Indebtedness of companies
whose creditworthiness is poor involves substantially greater risks, and may be
highly speculative.  Some companies may never pay off their indebtedness, or may
pay only a small fraction of the amount owed.  Consequently, when investing in
indebtedness of companies with poor credit, a Fund bears a substantial risk of
losing the entire amount invested.

     Each Fund limits the amount of its total assets that it will invest in any
one issuer or in issuers within the same industry (see "Investment
Restrictions").  For purposes of these limits, a Fund generally will treat the
corporate borrower as the "issuer" of indebtedness held by the Fund. In the case
of loan participations where a bank or other lending institution serves as a
financial intermediary between a Fund and the corporate borrower, if the
participation does not shift to the Fund the direct debtor-creditor relationship
with the corporate borrower, Securities and Exchange Commission ("SEC")
interpretations require the Fund to treat both the lending bank or other lending
institution and the corporate borrower as "issuers" for the purposes of
determining whether the Fund has invested more than 5% of its total assets in a
single issuer.  Treating a financial intermediary as an issuer of indebtedness
may restrict a Funds' ability to invest in indebtedness related to a single
financial intermediary, or a group of intermediaries engaged in the same
industry, even if the underlying borrowers represent many different companies
and industries.

     Loans and other types of direct indebtedness may not be readily marketable
and may be subject to restrictions on resale.  In some cases, negotiations
involved in disposing of indebtedness may require weeks to complete.
Consequently, some indebtedness may be difficult or impossible to dispose of
readily at what PIMCO believes to be a fair price.  In addition, valuation of
illiquid indebtedness involves a greater degree of judgment in determining a
Fund's net asset value than if that value were based on available market
quotations, and could result in significant variations in the Fund's daily share
price.  At the same time, some loan interests are traded among certain financial
institutions and accordingly may be deemed liquid.  As the market for different
types of indebtedness develops, the liquidity of these instruments is expected
to improve. In addition, the Funds currently intend to treat indebtedness for
which there is no readily available market as illiquid for purposes of the
Funds' limitation on illiquid investments. Investments in loan participations
are considered to be debt obligations for purposes of the Trust's investment
restriction relating to the lending of funds or assets by a Portfolio.

                                       12
<PAGE>

     Investments in loans through a direct assignment of the financial
institution's interests with respect to the loan may involve additional risks to
the Funds.  For example, if a loan is foreclosed, a Fund could become part owner
of any collateral, and would bear the costs and liabilities associated with
owning and disposing of the collateral.  In addition, it is conceivable that
under emerging legal theories of lender liability, a Fund could be held liable
as co-lender.  It is unclear whether loans and other forms of direct
indebtedness offer securities law protections against fraud and
misrepresentation.  In the absence of definitive regulatory guidance, the Funds
rely on PIMCO's research in an attempt to avoid situations where fraud or
misrepresentation could adversely affect the Funds.

Corporate Debt Securities

     A Fund's investments in U.S. dollar or foreign currency-denominated
corporate debt securities of domestic or foreign issuers are limited to
corporate debt securities (corporate bonds, debentures, notes and other similar
corporate debt instruments, including convertible securities) which meet the
minimum ratings criteria set forth for the Fund, or, if unrated, are in PIMCO's
opinion comparable in quality to corporate debt securities in which the Fund may
invest.

     Corporate income-producing securities may include forms of preferred or
preference stock.  The rate of interest on a corporate debt security may be
fixed, floating or variable, and may vary inversely with respect to a reference
rate.  The rate of return or return of principal on some debt obligations may be
linked or indexed to the level of exchange rates between the U.S. dollar and a
foreign currency or currencies.  Debt securities may be acquired with warrants
attached.

     Securities rated Baa and BBB are the lowest which are considered
"investment grade" obligations. Moody's Investor Service, Inc. ("Moody's")
describes securities rated Baa as "medium-grade" obligations; they are "neither
highly protected nor poorly secured . . . [i]nterest 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." Standard & Poor's Ratings Services ("S&P")
describes securities rated BBB as "regarded as having an adequate capacity to
pay interest and repay principal . . . [w]hereas 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 .
 . . than in higher rated categories."  For a discussion of securities rated
below investment grade, see "High Yield Securities ("Junk Bonds")" below.

High Yield Securities ("Junk Bonds")

     Investments in securities rated below investment grade that are eligible
for purchase by certain of the Funds and in particular, by the High Yield,
Emerging Markets and Convetible Funds are described as "speculative" by both
Moody's and S&P.  Investment in lower rated corporate debt securities ("high
yield securities" or "junk bonds") generally provides greater income and
increased opportunity for capital appreciation than investments in higher
quality securities, but they also typically entail greater price volatility and
principal and income risk. These high yield securities are regarded as
predominantly speculative with respect to the issuer's continuing ability to
meet principal and interest payments.  Analysis of the creditworthiness of
issuers of debt securities that are high yield may be more complex than for
issuers of higher quality debt securities.

     High yield securities may be more susceptible to real or perceived adverse
economic and competitive industry conditions than investment grade securities.
The prices of high yield securities have been found to be less sensitive to
interest-rate changes than higher-rated investments, but more sensitive to
adverse economic downturns or individual corporate developments.  A projection
of an economic downturn or of a period of rising interest rates, for example,
could cause a decline in high yield security prices because the advent of a
recession could lessen the ability of a highly leveraged company to make
principal and interest payments on its debt securities.  If an issuer of high
yield securities defaults, in

                                       13
<PAGE>

addition to risking payment of all or a portion of interest and principal, the
Funds investing in such securities may incur additional expenses to seek
recovery. In the case of high yield securities structured as zero-coupon or pay-
in-kind securities, their market prices are affected to a greater extent by
interest rate changes, and therefore tend to be more volatile than securities
which pay interest periodically and in cash. PIMCO seeks to reduce these risks
through diversification, credit analysis and attention to current developments
and trends in both the economy and financial markets.

     The secondary market on which high yield securities are traded may be less
liquid than the market for higher grade securities.  Less liquidity in the
secondary trading market could adversely affect the price at which the Funds
could sell a high yield security, and could adversely affect the daily net asset
value of the shares.  Adverse publicity and investor perceptions, whether or not
based on fundamental analysis, may decrease the values and liquidity of high
yield securities, especially in a thinly-traded market.  When secondary markets
for high yield securities are less liquid than the market for higher grade
securities, it may be more difficult to value the securities because such
valuation may require more research, and elements of judgment may play a greater
role in the valuation because there is less reliable, objective data available.
PIMCO seeks to minimize the risks of investing in all securities through
diversification, in-depth credit analysis and attention to current developments
in interest rates and market conditions.

     The use of credit ratings as the sole method of evaluating high yield
securities can involve certain risks.  For example, credit ratings evaluate the
safety of principal and interest payments, not the market value risk of high
yield securities.  Also, credit rating agencies may fail to change credit
ratings in a timely fashion to reflect events since the security was last rated.
PIMCO does not rely solely on credit ratings when selecting securities for the
Funds, and develops its own independent analysis of issuer credit quality.  If a
credit rating agency changes the rating of a portfolio security held by a Fund,
the Fund may retain the portfolio security if PIMCO deems it in the best
interest of shareholders.

Participation on Creditors Committees

     A Fund (in particular, the High Yield Fund) may from time to time
participate on committees formed by creditors to negotiate with the management
of financially troubled issuers of securities held by the Fund.  Such
participation may subject a Fund to expenses such as legal fees and may make a
Fund an "insider" of the issuer for purposes of the federal securities laws, and
therefore may restrict such Fund's ability to trade in or acquire additional
positions in a particular security when it might otherwise desire to do so.
Participation by a Fund on such committees also may expose the Fund to potential
liabilities under the federal bankruptcy laws or other laws governing the rights
of creditors and debtors.  A Fund will participate on such committees only when
PIMCO believes that such participation is necessary or desirable to enforce the
Fund's rights as a creditor or to protect the value of securities held by the
Fund.

Variable and Floating Rate Securities

     Variable and floating rate securities provide for a periodic adjustment in
the interest rate paid on the obligations.  The terms of such obligations must
provide that interest rates are adjusted periodically based upon an interest
rate adjustment index as provided in the respective obligations.  The adjustment
intervals may be regular, and range from daily up to annually, or may be event
based, such as based on a change in the prime rate.  The Money Market Fund may
invest in a variable rate security having a stated maturity in excess of 397
calendar days if the interest rate will be adjusted, and the Fund may demand
payment of principal from the issuers, within the period.

     Each Fund may invest in floating rate debt instruments ("floaters") and
(except the Money Market Fund) engage in credit spread trades.  The interest
rate on a floater is a variable rate which is tied to another interest rate,
such as a money-market index or Treasury bill rate.  The interest rate on a
floater resets periodically, typically every six months.  While, because of the
interest rate reset feature, floaters provide a Fund with a certain degree of
protection against rises in interest rates, a Fund will participate in

                                       14
<PAGE>

any declines in interest rates as well. A credit spread trade is an investment
position relating to a difference in the prices or interest rates of two
securities or currencies, where the value of the investment position is
determined by movements in the difference between the prices or interest rates,
as the case may be, of the respective securities or currencies.

     Each Fund (except the Money Market Fund) may also invest in inverse
floating rate debt instruments ("inverse floaters"). The interest rate on an
inverse floater resets in the opposite direction from the market rate of
interest to which the inverse floater is indexed. An inverse floating rate
security may exhibit greater price volatility than a fixed rate obligation of
similar credit quality. The Funds have adopted a policy under which no Fund will
invest more than 5% of its assets in any combination of inverse floater,
interest only ("IO"), or principal only ("PO") securities.

Inflation-Indexed Bonds

     Inflation-indexed bonds are fixed income securities whose principal value
is periodically adjusted according to the rate of inflation.  Two structures are
common.  The U.S. Treasury and some other issuers use a structure that accrues
inflation into the principal value of the bond.  Most other issuers pay out the
CPI accruals as part of a semiannual coupon.

     Inflation-indexed securities issued by the U.S. Treasury have maturities of
five, ten or thirty years, although it is possible that securities with other
maturities will be issued in the future.  The U.S. Treasury securities pay
interest on a semi-annual basis, equal to a fixed percentage of the inflation-
adjusted principal amount.  For example, if a Fund purchased an inflation-
indexed bond with a par value of $1,000 and a 3% real rate of return coupon
(payable 1.5% semi-annually), and inflation over the first six months were 1%,
the mid-year par value of the bond would be $1,010 and the first semi-annual
interest payment would  be $15.15 ($1,010 times 1.5%).  If inflation during the
second half of the year resulted in the whole years' inflation equaling 3%, the
end-of-year par value of the bond would be $1,030 and the second semi-annual
interest payment would be $15.45 ($1,030 times 1.5%).

     If the periodic adjustment rate 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, even during a period of deflation.  However, the
current market value of the bonds is not guaranteed, and will fluctuate.  The
Funds may also invest in other inflation related bonds which may or may not
provide a similar guarantee. If a guarantee of principal is not provided, 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 in turn are tied to the
relationship between nominal interest rates and the rate of inflation.
Therefore, if inflation were to rise at a faster rate than nominal interest
rates, real interest rates might decline, leading to an increase in value of
inflation-indexed bonds.  In contrast, if nominal interest rates increased at a
faster rate than inflation, real interest rates might rise, leading to a
decrease in value of inflation-indexed bonds.

     While these securities are expected to be protected from long-term
inflationary trends, short-term increases in inflation may lead to a decline in
value. If interest rates rise due to reasons other than inflation (for example,
due to changes in currency exchange rates), investors in these securities may
not be protected to the extent that the increase is not reflected in the bond's
inflation measure.

     The periodic adjustment of U.S. inflation-indexed bonds is tied to the
Consumer Price Index for Urban Consumers ("CPI-U"), which is calculated monthly
by the U.S. Bureau of Labor Statistics.  The CPI-U is a measurement of changes
in the cost of living, made up of components such as housing, food,
transportation and energy.  Inflation-indexed bonds issued by a foreign
government are generally adjusted

                                       15
<PAGE>

to reflect a comparable inflation index, calculated by that government. There
can be no assurance that the CPI-U or any foreign inflation index will
accurately measure the real rate of inflation in the prices of goods and
services. Moreover, there can be no assurance that the rate of inflation in a
foreign country will be correlated to the rate of inflation in the United
States.

     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.

Event-Linked Bonds

     Event-linked bonds are fixed income securities, for which the return of
principal and payment of interest is contingent on the non-occurrence of a
specific "trigger" event, such as a hurricane, earthquake, or other physical or
weather-related phenomenon.  They may be issued by government agencies,
insurance companies, reinsurers, special purpose corporations or other on-shore
or off-shore entities.  If a trigger event causes losses exceeding a specific
amount in the geographic region and time period specified in a bond, a Fund
investing in the bond may lose a portion or all of its principal invested in the
bond.  If no trigger event occurs, the Fund will recover its principal plus
interest.  For some event-linked bonds, the trigger event or losses may be based
on company-wide losses, index-portfolio losses, industry indices, or readings of
scientific instruments rather than specified actual losses.  Often the event-
linked bonds provide for extensions of maturity that are mandatory, or optional
at the discretion of the issuer, in order to process and audit loss claims in
those cases where a trigger event has, or possibly has, occurred. In addition to
the specified trigger events, event-linked bonds may also expose the Fund to
certain unanticipated risks including but not limited to issuer (credit)
default, adverse regulatory or jurisdictional interpretations, and adverse tax
consequences.

     Event-linked bonds are a relatively new type of financial instrument. As
such, there is no significant trading history of these securities, and there can
be no assurance that a liquid market in these instruments will develop.  See
"Illiquid Securities" below.  Lack of a liquid market may impose the risk of
higher transaction costs and the possibility that a Fund may be forced to
liquidate positions when it would not be advantageous to do so.  Event-linked
bonds are typically rated, and a Fund will only invest in catastrophe bonds that
meet the credit quality requirements for the Fund.

Convertible Securities

     A convertible debt security is a bond, debenture, note, or other security
that entitles the holder to acquire common stock or other equity securities of
the same or a different issuer.  A convertible security generally entitles the
holder to receive interest paid or accrued until the convertible security
matures or is redeemed, converted or exchanged.  Before conversion, convertible
securities have characteristics similar to non-convertible debt securities.
Convertible securities rank senior to common stock in a corporation's capital
structure and, therefore, generally entail less risk than the corporation's
common stock, although the extent to which such risk is reduced depends in large
measure upon the degree to which the convertible security sells above its value
as a fixed income security.

     Because of the conversion feature, the price of the convertible security
will normally fluctuate in some proportion to changes in the price of the
underlying asset, and as such is subject to risks relating to the activities of
the issuer and/or general market and economic conditions. The income component
of a convertible security may tend to cushion the security against declines in
the price of the underlying asset. However, the income component of convertible
securities causes fluctuations based upon changes in interest rates and the
credit quality of the issuer. In addition, convertible securities are often
lower-rated securities.

     A convertible security may be subject to redemption at the option of the
issuer at a predetermined price. If a convertible security held by a Fund is
called for redemption, the Fund would be required to

                                       16
<PAGE>

permit the issuer to redeem the security and convert it to underlying common
stock, or would sell the convertible security to a third party, which may have
an adverse effect on the Fund's ability to achieve its investment objective. A
Fund generally would invest in convertible securities for their favorable price
characteristics and total return potential and would normally not exercise an
option to convert unless the security is called or conversion is forced.

Warrants to Purchase Securities

     The Funds may invest in or acquire warrants to purchase equity or fixed
income securities. Bonds with warrants attached to purchase equity securities
have many characteristics of convertible bonds and their prices may, to some
degree, reflect the performance of the underlying stock.  Bonds also may be
issued with warrants attached to purchase additional fixed income securities at
the same coupon rate.  A decline in interest rates would permit a Fund to buy
additional bonds at the favorable rate or to sell the warrants at a profit.  If
interest rates rise, the warrants would generally expire with no value.

     A Fund will not invest more than 5% of its net assets, valued at the lower
of cost or market, in warrants to purchase securities.  Warrants acquired in
units or attached to securities will be deemed without value for purposes of
this restriction.

Foreign Securities

     Each Fund (except the Low Duration II, Total Return II, Long-Term U.S.
Government, Short Duration Municipal Income, Municipal Bond, California
Intermediate Municipal Bond and New York Intermediate Municipal Bond Funds) may
invest in corporate debt securities of foreign issuers (including preferred or
preference stock), certain foreign bank obligations (see "Bank Obligations") and
U.S. dollar or foreign currency-denominated obligations of foreign governments
or their subdivisions, agencies and instrumentalities, international agencies
and supranational entities.  The Money Market, Commercial Mortgage Securities,
Low Duration Mortgage and Total Return Mortgage Funds may invest in securities
of foreign issuers only if they are U.S. dollar-denominated.  The High Yield
Fund may invest up to 15% of its assets in euro-denominated securities.

     Securities traded in certain emerging market countries, including the
emerging market countries in Eastern Europe, may be subject to risks in addition
to risks typically posed by international investing due to the inexperience of
financial intermediaries, the lack of modern technology, and the lack of a
sufficient capital base to expand business operations.  Additionally, former
Communist regimes of a number of Eastern European countries previously
expropriated a large amount of property, the claims on which have not been
entirely settled.  There can be no assurance that a Fund's investments in
Eastern Europe will not also be expropriated, nationalized or otherwise
confiscated.

     Each Fund (except the Low Duration II, Total Return II, Long-Term U.S.
Government, Short Duration Municipal Income, Municipal Bond, California
Intermediate Municipal Bond and New York Intermediate Municipal Bond Funds) may
invest in Brady Bonds.  Brady Bonds are securities created through the exchange
of existing commercial bank loans to sovereign entities for new obligations in
connection with debt restructurings under a debt restructuring plan introduced
by former U.S. Secretary of the Treasury, Nicholas F. Brady (the "Brady Plan").
Brady Plan debt restructurings have been implemented in a number of countries,
including: Argentina, Bolivia, Bulgaria, Costa Rica, the Dominican Republic,
Ecuador, Jordan, Mexico, Niger, Nigeria, the Philippines, Poland, Uruguay, and
Venezuela.  In addition, Brazil has concluded a Brady-like plan.  It is expected
that other countries will undertake a Brady Plan in the future, including Panama
and Peru.

     Brady Bonds do not have a long payment history.  Brady Bonds may be
collateralized or uncollateralized, are issued in various currencies (primarily
the U.S. dollar) and are actively traded in the over-the-counter secondary
market.  Brady Bonds are not considered to be U.S. Government securities.  U.S.
dollar-denominated, collateralized Brady Bonds, which may be fixed rate par
bonds or floating rate

                                       17
<PAGE>

discount bonds, are generally collateralized in full as to principal by U.S.
Treasury zero coupon bonds having the same maturity as the Brady Bonds. Interest
payments on these Brady Bonds generally are collateralized on a one-year or
longer rolling-forward basis by cash or securities in an amount that, in the
case of fixed rate bonds, is equal to at least one year of interest payments or,
in the case of floating rate bonds, initially is equal to at least one year's
interest payments based on the applicable interest rate at that time and is
adjusted at regular intervals thereafter. Certain Brady Bonds are entitled to
"value recovery payments" in certain circumstances, which in effect constitute
supplemental interest payments but generally are not collateralized. Brady Bonds
are often viewed as having three or four valuation components: (i) the
collateralized repayment of principal at final maturity; (ii) the collateralized
interest payments; (iii) the uncollateralized interest payments; and (iv) any
uncollateralized repayment of principal at maturity (these uncollateralized
amounts constitute the "residual risk").

     Most Mexican Brady Bonds issued to date have principal repayments at final
maturity fully collateralized by U.S. Treasury zero coupon bonds (or comparable
collateral denominated in other currencies) and interest coupon payments
collateralized on an 18-month rolling-forward basis by funds held in escrow by
an agent for the bondholders.  A significant portion of the Venezuelan Brady
Bonds and the Argentine Brady Bonds issued to date have principal repayments at
final maturity collateralized by U.S. Treasury zero coupon bonds (or comparable
collateral denominated in other currencies) and/or interest coupon payments
collateralized on a 14-month (for Venezuela) or 12-month (for Argentina)
rolling-forward basis by securities held by the Federal Reserve Bank of New York
as collateral agent.

     Brady Bonds involve various risk factors including residual risk and the
history of defaults with respect to commercial bank loans by public and private
entities of countries issuing Brady Bonds.  There can be no assurance that Brady
Bonds in which the Funds may invest will not be subject to restructuring
arrangements or to requests for new credit, which may cause the Funds to suffer
a loss of interest or principal on any of its holdings.

     Investment in sovereign debt can involve a high degree of risk.  The
governmental entity that controls the repayment of sovereign debt may not be
able or willing to repay the principal and/or interest when due in accordance
with the terms of the debt.  A governmental entity's willingness or ability to
repay principal and interest due in a timely manner may be affected by, among
other factors, its cash flow situation, the extent of its foreign reserves, the
availability of sufficient foreign exchange on the date a payment is due, the
relative size of the debt service burden to the economy as a whole, the
governmental entity's policy toward the International Monetary Fund, and the
political constraints to which a governmental entity may be subject.
Governmental entities may also depend on expected disbursements from foreign
governments, multilateral agencies and others to reduce principal and interest
arrearages on their debt.  The commitment on the part of these governments,
agencies and others to make such disbursements may be conditioned on a
governmental entity's implementation of economic reforms and/or economic
performance and the timely service of such debtor's obligations.  Failure to
implement such reforms, achieve such levels of economic performance or repay
principal or interest when due may result in the cancellation of such third
parties' commitments to lend funds to the governmental entity, which may further
impair such debtor's ability or willingness to service its debts in a timely
manner.  Consequently, governmental entities may default on their sovereign
debt.  Holders of sovereign debt (including the Funds) may be requested to
participate in the rescheduling of such debt and to extend further loans to
governmental entities.  There is no bankruptcy proceeding by which sovereign
debt on which governmental entities have defaulted may be collected in whole or
in part.

     A Fund's investments in foreign currency denominated debt obligations and
hedging activities will likely produce a difference between its book income and
its taxable income.  This difference may cause a portion of the Fund's income
distributions to constitute returns of capital for tax purposes or require the
Fund to make distributions exceeding book income to qualify as a regulated
investment company for federal tax purposes.

                                       18
<PAGE>

     The Emerging Markets Bond Fund will consider an issuer to be economically
tied to a country with an emerging securities market if (1) the issuer is
organized under the laws of, or maintains its principal place of business in,
the country, (2) its securities are principally traded in the country's
securities markets, or (3) the issuer derived at least half of its revenues or
profits from goods produced or sold, investments made, or services performed in
the country, or has at least half of its assets in that country.

Foreign Currency Transactions

     All Funds that may invest in foreign currency-denominated securities also
may purchase and sell foreign currency options and foreign currency futures
contracts and related options (see "Derivative Instruments"), and may engage in
foreign currency transactions either on a spot (cash) basis at the rate
prevailing in the currency exchange market at the time or through forward
currency contracts ("forwards") with terms generally of less than one year.
Funds may engage in these transactions in order to protect against uncertainty
in the level of future foreign exchange rates in the purchase and sale of
securities.  The Funds may also use foreign currency options and foreign
currency forward contracts to increase exposure to a foreign currency or to
shift exposure to foreign currency fluctuations from one country to another.

     A forward involves an obligation to purchase or sell a specific currency at
a future date, which may be any fixed number of days from the date of the
contract agreed upon by the parties, at a price set at the time of the contract.
These contracts may be bought or sold to protect a Fund against a possible loss
resulting from an adverse change in the relationship between foreign currencies
and the U.S. dollar or to increase exposure to a particular foreign currency.
Open positions in forwards used for non-hedging purposes will be covered by the
segregation with the Trust's custodian of assets determined to be liquid by
PIMCO in accordance with procedures established by the Board of Trustees, and
are marked to market daily.  Although forwards are intended to minimize the risk
of loss due to a decline in the value of the hedged currencies, at the same
time, they tend to limit any potential gain which might result should the value
of such currencies increase.  Forwards will be used primarily to adjust the
foreign exchange exposure of each Fund with a view to protecting the outlook,
and the Funds might be expected to enter into such contracts under the following
circumstances:

     Lock In.  When PIMCO desires to lock in the U.S. dollar price on the
purchase or sale of a security denominated in a foreign currency.

     Cross Hedge.  If a particular currency is expected to decrease against
another currency, a Fund may sell the currency expected to decrease and purchase
a currency which is expected to increase against the currency sold in an amount
approximately equal to some or all of the Fund's portfolio holdings denominated
in the currency sold.

     Direct Hedge.  If PIMCO  wants to a eliminate substantially all of the risk
of owning a particular currency, and/or if PIMCO thinks that a Fund can benefit
from price appreciation in a given country's bonds but does not want to hold the
currency, it may employ a direct hedge back into the U.S. dollar.  In either
case, a Fund would enter into a forward contract to sell the currency in which a
portfolio security is denominated and purchase U.S. dollars at an exchange rate
established at the time it initiated the contract.  The cost of the direct hedge
transaction may offset most, if not all, of the yield advantage offered by the
foreign security, but a Fund would hope to benefit from an increase (if any) in
value of the bond.

     Proxy Hedge.  PIMCO might choose to use a proxy hedge, which may be less
costly than a direct hedge.  In this case, a Fund, having purchased a security,
will sell a currency whose value is believed to be closely linked to the
currency in which the security is denominated.  Interest rates prevailing in the
country whose currency was sold would be expected to be closer to those in the
U.S. and lower than those of securities denominated in the currency of the
original holding.  This type of hedging entails greater risk

                                       19
<PAGE>

than a direct hedge because it is dependent on a stable relationship between the
two currencies paired as proxies and the relationships can be very unstable at
times.

     Costs of Hedging.  When a Fund purchases a foreign bond with a higher
interest rate than is available on U.S. bonds of a similar maturity, the
additional yield on the foreign bond could be substantially reduced or lost if
the Fund were to enter into a direct hedge by selling the foreign currency and
purchasing the U.S. dollar.  This is what is known as the "cost" of hedging.
Proxy hedging attempts to reduce this cost through an indirect hedge back to the
U.S. dollar.

     It is important to note that hedging costs are treated as capital
transactions and are not, therefore, deducted from a Fund's dividend
distribution and are not reflected in its yield.  Instead such costs will, over
time, be reflected in a Fund's net asset value per share.

     Tax Consequences of Hedging.  Under applicable tax law, the Funds may be
required to limit their gains from hedging in foreign currency forwards,
futures, and options.  Although the Funds are expected to comply with such
limits, the extent to which these limits apply is subject to tax regulations as
yet unissued.  Hedging may also result in the application of the marked-to-
market and straddle provisions of the Internal Revenue Code.  Those provisions
could result in an increase (or decrease) in the amount of taxable dividends
paid by the Funds and could affect whether dividends paid by the Funds are
classified as capital gains or ordinary income.

Foreign Currency Exchange-Related Securities

     Foreign currency warrants.  Foreign currency warrants such as Currency
Exchange WarrantsSM ("CEWs/SM/") are warrants which entitle the holder to
receive from their issuer an amount of cash (generally, for warrants issued in
the United States, in U.S. dollars) which is calculated pursuant to a
predetermined formula and based on the exchange rate between a specified foreign
currency and the U.S. dollar as of the exercise date of the warrant. Foreign
currency warrants generally are exercisable upon their issuance and expire as of
a specified date and time. Foreign currency warrants have been issued in
connection with U.S. dollar-denominated debt offerings by major corporate
issuers in an attempt to reduce the foreign currency exchange risk which, from
the point of view of prospective purchasers of the securities, is inherent in
the international fixed-income marketplace. Foreign currency warrants may
attempt to reduce the foreign exchange risk assumed by purchasers of a security
by, for example, providing for a supplemental payment in the event that the U.S.
dollar depreciates against the value of a major foreign currency such as the
Japanese Yen or German Deutschmark. The formula used to determine the amount
payable upon exercise of a foreign currency warrant may make the warrant
worthless unless the applicable foreign currency exchange rate moves in a
particular direction (e.g., unless the U.S. dollar appreciates or depreciates
against the particular foreign currency to which the warrant is linked or
indexed). Foreign currency warrants are severable from the debt obligations with
which they may be offered, and may be listed on exchanges. Foreign currency
warrants may be exercisable only in certain minimum amounts, and an investor
wishing to exercise warrants who possesses less than the minimum number required
for exercise may be required either to sell the warrants or to purchase
additional warrants, thereby incurring additional transaction costs. In the case
of any exercise of warrants, there may be a time delay between the time a holder
of warrants gives instructions to exercise and the time the exchange rate
relating to exercise is determined, during which time the exchange rate could
change significantly, thereby affecting both the market and cash settlement
values of the warrants being exercised. The expiration date of the warrants may
be accelerated if the warrants should be delisted from an exchange or if their
trading should be suspended permanently, which would result in the loss of any
remaining "time value" of the warrants (i.e., the difference between the current
market value and the exercise value of the warrants), and, in the case the
warrants were "out-of-the-money," in a total loss of the purchase price of the
warrants. Warrants are generally unsecured obligations of their issuers and are
not standardized foreign currency options issued by the Options Clearing
Corporation ("OCC"). Unlike foreign currency options issued by OCC, the terms of
foreign exchange warrants generally will not be amended in the event of
governmental or regulatory actions

                                       20
<PAGE>

affecting exchange rates or in the event of the imposition of other regulatory
controls affecting the international currency markets. The initial public
offering price of foreign currency warrants is generally considerably in excess
of the price that a commercial user of foreign currencies might pay in the
interbank market for a comparable option involving significantly larger amounts
of foreign currencies. Foreign currency warrants are subject to significant
foreign exchange risk, including risks arising from complex political or
economic factors.

     Principal exchange rate linked securities.  Principal exchange rate linked
securities ("PERLsSM") are debt obligations the principal on which is payable at
maturity in an amount that may vary based on the exchange rate between the U.S.
dollar and a particular foreign currency at or about that time.  The return on
"standard" principal exchange rate linked securities is enhanced if the foreign
currency to which the security is linked appreciates against the U.S. dollar,
and is adversely affected by increases in the foreign exchange value of the U.S.
dollar; "reverse" principal exchange rate linked securities are like the
"standard" securities, except that their return is enhanced by increases in the
value of the U.S. dollar and adversely impacted by increases in the value of
foreign currency.  Interest payments on the securities are generally made in
U.S. dollars at rates that reflect the degree of foreign currency risk assumed
or given up by the purchaser of the notes (i.e., at relatively higher interest
rates if the purchaser has assumed some of the foreign exchange risk, or
relatively lower interest rates if the issuer has assumed some of the foreign
exchange risk, based on the expectations of the current market). Principal
exchange rate linked securities may in limited cases be subject to acceleration
of maturity (generally, not without the consent of the holders of the
securities), which may have an adverse impact on the value of the principal
payment to be made at maturity.

     Performance indexed paper.  Performance indexed paper ("PIPsSM") is U.S.
dollar-denominated commercial paper the yield of which is linked to certain
foreign exchange rate movements.  The yield to the investor on performance
indexed paper is established at maturity as a function of spot exchange rates
between the U.S. dollar and a designated currency as of or about that time
(generally, the index maturity two days prior to maturity).  The yield to the
investor will be within a range stipulated at the time of purchase of the
obligation, generally with a guaranteed minimum rate of return that is below,
and a potential maximum rate of return that is above, market yields on U.S.
dollar-denominated commercial paper, with both the minimum and maximum rates of
return on the investment corresponding to the minimum and maximum values of the
spot exchange rate two business days prior to maturity.

Borrowing

     Each Fund may borrow money to the extent permitted under the Investment
Company Act of 1940 ("1940 Act"), as amended, and as interpreted, modified or
otherwise permitted by regulatory authority having jurisdiction, from time to
time.  This means that, in general, a Fund may borrow money from banks for any
purpose on a secured basis in an amount up to 1/3 of the Fund's total assets.  A
Fund may also borrow money for temporary administrative purposes on an unsecured
basis in an amount not to exceed 5% of the Fund's total assets.

     Specifically, provisions of the 1940 Act require a Fund to maintain
continuous asset coverage (that is, total assets including borrowings, less
liabilities exclusive of borrowings) of 300% of the amount borrowed, with an
exception for borrowings not in excess of 5% of the Fund's total assets made for
temporary administrative purposes.  Any borrowings for temporary administrative
purposes in excess of 5% of the Fund's total assets must maintain continuous
asset coverage.  If the 300% asset coverage should decline as a result of market
fluctuations or other reasons, a Fund may be required to sell some of its
portfolio holdings within three days to reduce the debt and restore the 300%
asset coverage, even though it may be disadvantageous from an investment
standpoint to sell securities at that time.

     As noted below, a Fund also may enter into certain transactions, including
reverse repurchase agreements, mortgage dollar rolls, and sale-buybacks, that
can be viewed as constituting a form of

                                       21
<PAGE>

borrowing or financing transaction by the Fund. To the extent a Fund covers its
commitment under a reverse repurchase agreement (or economically similar
transaction) by the segregation of assets determined in accordance with
procedures adopted by the Trustees, equal in value to the amount of the Fund's
commitment to repurchase, such an agreement will not be considered a "senior
security" by the Fund and therefore will not be subject to the 300% asset
coverage requirement otherwise applicable to borrowings by the Funds. Borrowing
will tend to exaggerate the effect on net asset value of any increase or
decrease in the market value of a Fund's portfolio. Money borrowed will be
subject to interest costs which may or may not be recovered by appreciation of
the securities purchased. A Fund also may be required to maintain minimum
average balances in connection with such borrowing or to pay a commitment or
other fee to maintain a line of credit; either of these requirements would
increase the cost of borrowing over the stated interest rate. The Global Bond
Fund II has adopted a non-fundamental investment restriction under which the
Fund may not borrow in excess of 10% of the value of its total assets and then
only from banks as a temporary measure to facilitate the meeting of redemption
requests (not for leverage) or for extraordinary or emergency purposes. Non-
fundamental investment restrictions may be changed without shareholder approval.

     A Fund may enter into reverse repurchase agreements, mortgage dollar rolls,
and economically similar transactions.  A reverse repurchase agreement involves
the sale of a portfolio-eligible security by a Fund, coupled with its agreement
to repurchase the instrument at a specified time and price.  Under a reverse
repurchase agreement, the Fund continues to receive any principal and interest
payments on the underlying security during the term of the agreement. The Fund
typically will segregate assets determined to be liquid by PIMCO in accordance
with procedures established by the Board of Trustees, equal (on a daily mark-to-
market basis) to its obligations under reverse repurchase agreements.  However,
reverse repurchase agreements involve the risk that the market value of
securities retained by the Fund may decline below the repurchase price of the
securities sold by the Fund which it is obligated to repurchase. To the extent
that positions in reverse repurchase agreements are not covered through the
segregation of liquid assets at least equal to the amount of any forward
purchase commitment, such transactions would be subject to the Funds'
limitations on borrowings, which would, among other things, restrict the
aggregate of such transactions (plus any other borrowings) to 1/3 (for each Fund
except the Global Bond Fund II) of a Fund's total assets.

     A "mortgage dollar roll" is similar to a reverse repurchase agreement in
certain respects.  In a "dollar roll" transaction a Fund sells a mortgage-
related security, such as a security issued by the Government National Mortgage
Association ("GNMA"), to a dealer and simultaneously agrees to repurchase a
similar security (but not the same security) in the future at a pre-determined
price.  A "dollar roll" can be viewed, like a reverse repurchase agreement, as a
collateralized borrowing in which a Fund pledges a mortgage-related security to
a dealer to obtain cash.  Unlike in the case of reverse repurchase agreements,
the dealer with which a Fund enters into a dollar roll transaction is not
obligated to return the same securities as those originally sold by the Fund,
but only securities which are "substantially identical." To be considered
"substantially identical," the securities returned to a Fund generally must:
(1) be collateralized by the same types of underlying mortgages; (2) be issued
by the same agency and be part of the same program; (3) have a similar original
stated maturity; (4) have identical net coupon rates; (5) have similar market
yields (and therefore price); and (6) satisfy "good delivery" requirements,
meaning that the aggregate principal amounts of the securities delivered and
received back must be within 2.5% of the initial amount delivered.

     A Fund's obligations under a dollar roll agreement must be covered by
segregated liquid assets equal in value to the securities subject to repurchase
by the Fund.  As with reverse repurchase agreements, to the extent that
positions in dollar roll agreements are not covered by segregated liquid assets
at least equal to the amount of any forward purchase commitment, such
transactions would be subject to the Funds' restrictions on borrowings.
Furthermore, because dollar roll transactions may be for terms ranging between
one and six months, dollar roll transactions may be deemed "illiquid" and
subject to a Fund's overall limitations on investments in illiquid securities.

                                       22
<PAGE>

     A Fund also may effect simultaneous purchase and sale transactions that are
known as "sale-buybacks".  A sale-buyback is similar to a reverse repurchase
agreement, except that in a sale-buyback, the counterparty who purchases the
security is entitled to receive any principal or interest payments make on the
underlying security pending settlement of the Fund's repurchase of the
underlying security.  A Fund's obligations under a sale-buyback typically would
be offset by liquid assets equal in value to the amount of the Fund's forward
commitment to repurchase the subject security.

Derivative Instruments

     In pursuing their individual objectives the Funds (except the Money Market
Fund) may purchase and sell (write) both put options and call options on
securities, securities indexes, and foreign currencies, and enter into interest
rate, foreign currency and index futures contracts and purchase and sell options
on such futures contracts ("futures options") for hedging purposes or as part of
their overall investment strategies, except that those Funds that may not invest
in foreign currency-denominated securities may not enter into transactions
involving currency futures or options.  The Funds (except the Money Market, Low
Duration II, Total Return II, Long-Term U.S. Government, Short Duration
Municipal Income, Municipal Bond, California Intermediate Municipal Bond and New
York Intermediate Municipal Bond Funds) also may purchase and sell foreign
currency options for purposes of increasing exposure to a foreign currency or to
shift exposure to foreign currency fluctuations from one country to another.
The Funds (except the Money Market Fund) also may enter into swap agreements
with respect to interest rates and indexes of securities, and to the extent it
may invest in foreign currency-denominated securities, may enter into swap
agreements with respect to foreign currencies.  The Funds may invest in
structured notes.  If other types of financial instruments, including other
types of options, futures contracts, or futures options are traded in the
future, a Fund may also use those instruments, provided that the Trustees
determine that their use is consistent with the Fund's investment objective.

     The value of some derivative instruments in which the Funds invest may be
particularly sensitive to changes in prevailing interest rates, and, like the
other investments of the Funds, the ability of a Fund to successfully utilize
these instruments may depend in part upon the ability of PIMCO to forecast
interest rates and other economic factors correctly.  If PIMCO incorrectly
forecasts such factors and has taken positions in derivative instruments
contrary to prevailing market trends, the Funds could be exposed to the risk of
loss.

     The Funds might not employ any of the strategies described below, and no
assurance can be given that any strategy used will succeed.  If PIMCO
incorrectly forecasts interest rates, market values or other economic factors in
utilizing a derivatives strategy for a Fund, the Fund might have been in a
better position if it had not entered into the transaction at all. Also,
suitable derivative transactions may not be available in all circumstances.  The
use of these strategies involves certain special risks, including a possible
imperfect correlation, or even no correlation, between price movements of
derivative instruments and price movements of related investments.  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 related investments or otherwise, due to the
possible inability of a Fund to purchase or sell a portfolio security at a time
that otherwise would be favorable or the possible need to sell a portfolio
security at a disadvantageous time because the Fund is required to maintain
asset coverage or offsetting positions in connection with transactions in
derivative instruments, and the possible inability of a Fund to close out or to
liquidate its derivatives positions. In addition, a Fund's use of such
instruments may cause the Fund to realize higher amounts of short-term capital
gains (generally taxed at ordinary income tax rates) than if it had not used
such instruments.

     Options on Securities and Indexes.  A Fund may, to the extent specified
herein or in the Prospectuses, purchase and sell both put and call options on
fixed income or other securities or indexes in standardized contracts traded on
foreign or domestic securities exchanges, boards of trade, or similar

                                       23
<PAGE>

entities, or quoted on NASDAQ or on a regulated foreign over-the-counter market,
and agreements, sometimes called cash puts, which may accompany the purchase of
a new issue of bonds from a dealer.

     An option on a security (or index) is a contract that gives the holder of
the option, in return for a premium, the right to buy from (in the case of a
call) or sell to (in the case of a put) the writer of the option the security
underlying the option (or the cash value of the index) at a specified exercise
price at any time during the term of the option.  The writer of an option on a
security has the obligation upon exercise of the option to deliver the
underlying security upon payment of the exercise price or to pay the exercise
price upon delivery of the underlying security.  Upon exercise, the writer of an
option on an index is obligated to pay the difference between the cash value of
the index and the exercise price multiplied by the specified multiplier for the
index option.  (An index is designed to reflect features of a particular
financial or securities market, a specific group of financial instruments or
securities, or certain economic indicators.)

     A Fund will write call options and put options only if they are "covered."
In the case of a call option on a security, the option is "covered" if the Fund
owns the security underlying the call or has an absolute and immediate right to
acquire that security without additional cash consideration (or, if additional
cash consideration is required, cash or other assets determined to be liquid by
PIMCO in accordance with procedures established by the Board of Trustees, in
such amount are segregated by its custodian) upon conversion or exchange of
other securities held by the Fund.  For a call option on an index, the option is
covered if the Fund maintains with its custodian assets determined to be liquid
by PIMCO in accordance with procedures established by the Board of Trustees, in
an amount equal to the contract value of the index.  A call option is also
covered if the Fund holds a call on the same security or index as the call
written where the exercise price of the call held is (i) equal to or less than
the exercise price of the call written, or (ii) greater than the exercise price
of the call written, provided the difference is maintained by the Fund in
segregated assets determined to be liquid by PIMCO in accordance with procedures
established by the Board of Trustees.  A put option on a security or an index is
"covered" if the Fund segregates assets determined to be liquid by PIMCO in
accordance with procedures established by the Board of Trustees equal to the
exercise price.  A put option is also covered if the Fund holds a put on the
same security or index as the put written where the exercise price of the put
held is (i) equal to or greater than the exercise price of the put written, or
(ii) less than the exercise price of the put written, provided the difference is
maintained by the Fund in segregated assets determined to be liquid by PIMCO in
accordance with procedures established by the Board of Trustees.

     If an option written by a Fund expires unexercised, the Fund realizes a
capital gain equal to the premium received at the time the option was written.
If an option purchased by a Fund expires unexercised, the Fund realizes a
capital loss equal to the premium paid.  Prior to the earlier of exercise or
expiration, an exchange traded option may be closed out by an offsetting
purchase or sale of an option of the same series (type, exchange, underlying
security or index, exercise price, and expiration).  There can be no assurance,
however, that a closing purchase or sale transaction can be effected when the
Fund desires.

     A Fund may sell put or call options it has previously purchased, which
could result in a net gain or loss depending on whether the amount realized on
the sale is more or less than the premium and other transaction costs paid on
the put or call option which is sold.  Prior to exercise or expiration, an
option may be closed out by an offsetting purchase or sale of an option of the
same series. A Fund will realize a capital gain from a closing purchase
transaction if the cost of the closing option is less than the premium received
from writing the option, or, if it is more, the Fund will realize a capital
loss.  If the premium received from a closing sale transaction is more than the
premium paid to purchase the option, the Fund will realize a capital gain or, if
it is less, the Fund will realize a capital loss. The principal factors
affecting the market value of a put or a call option include supply and demand,
interest rates, the current market price of the underlying security or index in
relation to the exercise price of the option, the volatility of the underlying
security or index, and the time remaining until the expiration date.

                                       24
<PAGE>

     The premium paid for a put or call option purchased by a Fund is an asset
of the Fund.  The premium received for an option written by a Fund is recorded
as a deferred credit.  The value of an option purchased or written is marked to
market daily and is valued at the closing price on the exchange on which it is
traded or, if not traded on an exchange or no closing price is available, at the
mean between the last bid and asked prices.

     The Funds may write covered straddles consisting of a combination of a call
and a put written on the same underlying security.  A straddle will be covered
when sufficient assets are deposited to meet the Funds' immediate obligations.
The Funds may use the same liquid assets to cover both the call and put options
where the exercise price of the call and put are the same, or the exercise price
of the call is higher than that of the put.  In such cases, the Funds will also
segregate liquid assets equivalent to the amount, if any, by which the put is
"in the money."

     Risks Associated with Options on Securities and Indexes.  There are several
risks associated with transactions in options on securities and on indexes.  For
example, there are significant differences between the securities and options
markets that could result in an imperfect correlation between these markets,
causing a given transaction not to achieve its objectives.  A decision as to
whether, when and how to use options involves the exercise of skill and
judgment, and even a well-conceived transaction may be unsuccessful to some
degree because of market behavior or unexpected events.

     During the option period, the covered call writer has, in return for the
premium on the option, given up the opportunity to profit from a price increase
in the underlying security above the exercise price, but, as long as its
obligation as a writer continues, has retained the risk of loss should the price
of the underlying security decline. The writer of an option has no control over
the time when it may be required to fulfill its obligation as a writer of the
option. Once an option writer has received an exercise notice, it cannot effect
a closing purchase transaction in order to terminate its obligation under the
option and must deliver the underlying security at the exercise price. If a put
or call option purchased by the Fund is not sold when it has remaining value,
and if the market price of the underlying security remains equal to or greater
than the exercise price (in the case of a put), or remains less than or equal to
the exercise price (in the case of a call), the Fund will lose its entire
investment in the option. Also, where a put or call option on a particular
security is purchased to hedge against price movements in a related security,
the price of the put or call option may move more or less than the price of the
related security.

     There can be no assurance that a liquid market will exist when a Fund seeks
to close out an option position.  If a Fund were unable to close out an option
that it had purchased on a security, it would have to exercise the option in
order to realize any profit or the option may expire worthless. If a Fund were
unable to close out a covered call option that it had written on a security, it
would not be able to sell the underlying security unless the option expired
without exercise.  As the writer of a covered call option, a Fund forgoes,
during the option's life, the opportunity to profit from increases in the market
value of the security covering the call option above the sum of the premium and
the exercise price of the call.

     If trading were suspended in an option purchased by a Fund, the Fund would
not be able to close out the option.  If restrictions on exercise were imposed,
the Fund might be unable to exercise an option it has purchased. Except to the
extent that a call option on an index written by the Fund is covered by an
option on the same index purchased by the Fund, movements in the index may
result in a loss to the Fund; however, such losses may be mitigated by changes
in the value of the Fund's securities during the period the option was
outstanding.

     Foreign Currency Options. Funds that invest in foreign currency-denominated
securities may buy or sell put and call options on foreign currencies.  A Fund
may buy or sell put and call options on foreign currencies either on exchanges
or in the over-the-counter market.  A put option on a foreign currency gives the
purchaser of the option the right to sell a foreign currency at the exercise
price until the option expires.  A call option on a foreign currency gives the
purchaser of the option the right to purchase the currency at the exercise price
until the option expires.  Currency options traded on U.S. or other

                                       25
<PAGE>

exchanges may be subject to position limits which may limit the ability of a
Fund to reduce foreign currency risk using such options. Over-the-counter
options differ from traded options in that they are two-party contracts with
price and other terms negotiated between buyer and seller, and generally do not
have as much market liquidity as exchange-traded options.

     Futures Contracts and Options on Futures Contracts.  Each Fund (except the
Money Market Fund) may invest in interest rate futures contracts and options
thereon ("futures options"), and to the extent it may invest in foreign
currency-denominated securities, may also invest in foreign currency futures
contracts and options thereon.  The Short Duration Municipal Income, Municipal
Bond, California Intermediate Municipal Bond and New York Intermediate Municipal
Bond Funds may purchase and sell futures contracts on U.S. Government securities
and Municipal Bonds, as well as purchase put and call options on such futures
contracts.  The Strategic Balanced, Convertible, StocksPLUS and StocksPLUS Short
Strategy Funds may invest in interest rate, stock index and foreign currency
futures contracts and options thereon.

     An interest rate, foreign currency or index futures contract provides for
the future sale by one party and purchase by another party of a specified
quantity of a financial instrument, foreign currency or the cash value of an
index at a specified price and time.  A futures contract on an index is an
agreement pursuant to which two parties agree to take or make delivery of an
amount of cash equal to the difference between the value of the index at the
close of the last trading day of the contract and the price at which the index
contract was originally written.  Although the value of an index might be a
function of the value of certain specified securities, no physical delivery of
these securities is made.  A public market exists in futures contracts covering
a number of indexes as well as financial instruments and foreign currencies,
including: the S&P 500; the S&P Midcap 400; the Nikkei 225; the NYSE composite;
U.S. Treasury bonds; U.S. Treasury notes; GNMA Certificates; three-month U.S.
Treasury bills; 90-day commercial paper; bank certificates of deposit;
Eurodollar certificates of deposit; the Australian dollar; the Canadian dollar;
the British pound; the German mark; the Japanese yen; the French franc; the
Swiss franc; the Mexican peso; and certain multinational currencies, such as the
euro.  It is expected that other futures contracts will be developed and traded
in the future.

     A Fund may purchase and write call and put futures options, as specified
for that Fund in the Prospectuses.  Futures options possess many of the same
characteristics as options on securities and indexes (discussed above).  A
futures option gives the holder the right, in return for the premium paid, to
assume a long position (call) or short position (put) in a futures contract at a
specified exercise price at any time during the period of the option.  Upon
exercise of a call option, the holder acquires a long position in the futures
contract and the writer is assigned the opposite short position.  In the case of
a put option, the opposite is true.

     To comply with applicable rules of the Commodity Futures Trading Commission
("CFTC") under which the Trust and the Funds avoid being deemed a "commodity
pool" or a "commodity pool operator," each Fund intends generally to limit its
use of futures contracts and futures options to "bona fide hedging"
transactions, as such term is defined in applicable regulations, interpretations
and practice.  For example, a Fund might use futures contracts to hedge against
anticipated changes in interest rates that might adversely affect either the
value of the Fund's securities or the price of the securities which the Fund
intends to purchase.  A Fund's hedging activities may include sales of futures
contracts as an offset against the effect of expected increases in interest
rates, and purchases of futures contracts as an offset against the effect of
expected declines in interest rates.  Although other techniques could be used to
reduce that Fund's exposure to interest rate fluctuations, the Fund may be able
to hedge its exposure more effectively and perhaps at a lower cost by using
futures contracts and futures options.

     A Fund will only enter into futures contracts and futures options which are
standardized and traded on a U.S. or foreign exchange, board of trade, or
similar entity, or quoted on an automated quotation system.

                                       26
<PAGE>

     When a purchase or sale of a futures contract is made by a Fund, the Fund
is required to deposit with its custodian (or broker, if legally permitted) a
specified amount of assets determined to be liquid by PIMCO in accordance with
procedures established by the Board of Trustees ("initial margin").  The margin
required for a futures contract is set by the exchange on which the contract is
traded and may be modified during the term of the contract.  Margin requirements
on foreign exchanges may be different than U.S. exchanges.  The initial margin
is in the nature of a performance bond or good faith deposit on the futures
contract which is returned to the Fund upon termination of the contract,
assuming all contractual obligations have been satisfied.  Each Fund expects to
earn interest income on its initial margin deposits.  A futures contract held by
a Fund is valued daily at the official settlement price of the exchange on which
it is traded.  Each day the Fund pays or receives cash, called "variation
margin," equal to the daily change in value of the futures contract.  This
process is known as "marking to market."  Variation margin does not represent a
borrowing or loan by a Fund but is instead a settlement between the Fund and the
broker of the amount one would owe the other if the futures contract expired.
In computing daily net asset value, each Fund will mark to market its open
futures positions.

     A Fund is also required to deposit and maintain margin with respect to put
and call options on futures contracts written by it.  Such margin deposits will
vary depending on the nature of the underlying futures contract (and the related
initial margin requirements), the current market value of the option, and other
futures positions held by the Fund.

     Although some futures contracts call for making or taking delivery of the
underlying securities, generally these obligations are closed out prior to
delivery by offsetting purchases or sales of matching futures contracts (same
exchange, underlying security or index, and delivery month).  If an offsetting
purchase price is less than the original sale price, the Fund realizes a capital
gain, or if it is more, the Fund realizes a capital loss. Conversely, if an
offsetting sale price is more than the original purchase price, the Fund
realizes a capital gain, or if it is less, the Fund realizes a capital loss.
The transaction costs must also be included in these calculations.

     The Funds may write covered straddles consisting of a call and a put
written on the same underlying futures contract.  A straddle will be covered
when sufficient assets are deposited to meet the Funds' immediate obligations.
A Fund may use the same liquid assets to cover both the call and put options
where the exercise price of the call and put are the same, or the exercise price
of the call is higher than that of the put.  In such cases, the Funds will also
segregate liquid assets equivalent to the amount, if any, by which the put is
"in the money."

     Limitations on Use of Futures and Futures Options.  In general, the Funds
intend to enter into positions in futures contracts and related options only for
"bona fide hedging" purposes.  With respect to positions in futures and related
options that do not constitute bona fide hedging positions, a Fund will not
enter into a futures contract or futures option contract if, immediately
thereafter, the aggregate initial margin deposits relating to such positions
plus premiums paid by it for open futures option positions, less the amount by
which any such options are "in-the-money," would exceed 5% of the Fund's net
assets.  A call option is "in-the-money" if the value of the futures contract
that is the subject of the option exceeds the exercise price.  A put option is
"in-the-money" if the exercise price exceeds the value of the futures contract
that is the subject of the option.

     When purchasing a futures contract, a Fund will maintain with its custodian
(and mark-to-market on a daily basis) assets determined to be liquid by PIMCO in
accordance with procedures established by the Board of Trustees, that, when
added to the amounts deposited with a futures commission merchant as margin, are
equal to the market value of the futures contract.  Alternatively, the Fund may
"cover" its position by purchasing a put option on the same futures contract
with a strike price as high or higher than the price of the contract held by the
Fund.

     When selling a futures contract, a Fund will maintain with its custodian
(and mark-to-market on a daily basis) assets determined to be liquid by PIMCO in
accordance with procedures established by the

                                       27
<PAGE>

Board of Trustees, that are equal to the market value of the instruments
underlying the contract. Alternatively, the Fund may "cover" its position by
owning the instruments underlying the contract (or, in the case of an index
futures contract, a portfolio with a volatility substantially similar to that of
the index on which the futures contract is based), or by holding a call option
permitting the Fund to purchase the same futures contract at a price no higher
than the price of the contract written by the Fund (or at a higher price if the
difference is maintained in liquid assets with the Trust's custodian).

     When selling a call option on a futures contract, a Fund will maintain with
its custodian (and mark-to-market on a daily basis) assets determined to be
liquid by PIMCO in accordance with procedures established by the Board of
Trustees, that, when added to the amounts deposited with a futures commission
merchant as margin, equal the total market value of the futures contract
underlying the call option.  Alternatively, the Fund may cover its position by
entering into a long position in the same futures contract at a price no higher
than the strike price of the call option, by owning the instruments underlying
the futures contract, or by holding a separate call option permitting the Fund
to purchase the same futures contract at a price not higher than the strike
price of the call option sold by the Fund.

     When selling a put option on a futures contract, a Fund will maintain with
its custodian (and mark-to-market on a daily basis) assets determined to be
liquid by PIMCO in accordance with procedures established by the Board of
Trustees, that equal the purchase price of the futures contract, less any margin
on deposit.  Alternatively, the Fund may cover the position either by entering
into a short position in the same futures contract, or by owning a separate put
option permitting it to sell the same futures contract so long as the strike
price of the purchased put option is the same or higher than the strike price of
the put option sold by the Fund.

     To the extent that securities with maturities greater than one year are
used to segregate assets to cover a Fund's obligations under futures contracts
and related options, such use will not eliminate the risk of a form of leverage,
which may tend to exaggerate the effect on net asset value of any increase or
decrease in the market value of a Fund's portfolio, and may require liquidation
of portfolio positions when it is not advantageous to do so.  However, any
potential risk of leverage resulting from the use of securities with maturities
greater than one year may be mitigated by the overall duration limit on a Fund's
portfolio securities.  Thus, the use of a longer-term security may require a
Fund to hold offsetting short-term securities to balance the Fund's portfolio
such that the Fund's duration does not exceed the maximum permitted for the Fund
in the Prospectuses.

     The requirements for qualification as a regulated investment company also
may limit the extent to which a Fund may enter into futures, futures options or
forward contracts.  See "Taxation."

     Risks Associated with Futures and Futures Options.  There are several risks
associated with the use of futures contracts and futures options as hedging
techniques.  A purchase or sale of a futures contract may result in losses in
excess of the amount invested in the futures contract.  There can be no
guarantee that there will be a correlation between price movements in the
hedging vehicle and in the Fund securities being hedged.  In addition, there are
significant differences between the securities and futures markets that could
result in an imperfect correlation between the markets, causing a given hedge
not to achieve its objectives.  The degree of imperfection of correlation
depends on circumstances such as variations in speculative market demand for
futures and futures options on securities, including technical influences in
futures trading and futures options, and differences between the financial
instruments being hedged and the instruments underlying the standard contracts
available for trading in such respects as interest rate levels, maturities, and
creditworthiness of issuers.  A decision as to whether, when and how to hedge
involves the exercise of skill and judgment, and even a well-conceived hedge may
be unsuccessful to some degree because of market behavior or unexpected interest
rate trends.

     Futures contracts on U.S. Government securities historically have reacted
to an increase or decrease in interest rates in a manner similar to that in
which the underlying U.S. Government securities reacted.  To the extent,
however, that the Municipal Bond Fund enters into such futures contracts, the

                                       28
<PAGE>

value of such futures will not vary in direct proportion to the value of the
Fund's holdings of Municipal Bonds (as defined below).  Thus, the anticipated
spread between the price of the futures contract and the hedged security may be
distorted due to differences in the nature of the markets.  The spread also may
be distorted by differences in initial and variation margin requirements, the
liquidity of such markets and the participation of speculators in such markets.

     Futures exchanges may limit the amount of fluctuation permitted in certain
futures contract prices during a single trading day.  The daily limit
establishes the maximum amount that the price of a futures contract may vary
either up or down from the previous day's settlement price at the end of the
current trading session.  Once the daily limit has been reached in a futures
contract subject to the limit, no more trades may be made on that day at a price
beyond that limit.  The daily limit governs only price movements during a
particular trading day and therefore does not limit potential losses because the
limit may work to prevent the liquidation of unfavorable positions.  For
example, futures prices have occasionally moved to the daily limit for several
consecutive trading days with little or no trading, thereby preventing prompt
liquidation of positions and subjecting some holders of futures contracts to
substantial losses.

     There can be no assurance that a liquid market will exist at a time when a
Fund seeks to close out a futures or a futures option position, and that Fund
would remain obligated to meet margin requirements until the position is closed.
In addition, many of the contracts discussed above are relatively new
instruments without a significant trading history.  As a result, there can be no
assurance that an active secondary market will develop or continue to exist.

     Additional Risks of Options on Securities, Futures Contracts, Options on
Futures Contracts, and Forward Currency Exchange Contracts and Options Thereon.
Options on securities, futures contracts, options on futures contracts, and
options on currencies may be traded on foreign exchanges. Such transactions may
not be regulated as effectively as similar transactions in the United States;
may not involve a clearing mechanism and related guarantees, and are subject to
the risk of governmental actions affecting trading in, or the prices of, foreign
securities.  The value of such positions also could be adversely affected by (i)
other complex foreign political, legal and economic factors, (ii) lesser
availability than in the United States of data on which to make trading
decisions, (iii) delays in the Trust's ability to act upon economic events
occurring in foreign markets during non-business hours in the United States,
(iv) the imposition of different exercise and settlement terms and procedures
and margin requirements than in the United States, and (v) lesser trading
volume.

     Swap Agreements.  Each Fund (except the Money Market Fund) may enter into
interest rate, index and, to the extent it may invest in foreign currency-
denominated securities, currency exchange rate swap agreements.  These
transactions are entered into in an attempt to obtain a particular return when
it is considered desirable to do so, possibly at a lower cost to the Fund than
if the Fund had invested directly in an instrument that yielded that desired
return.  Swap agreements are two party contracts entered into primarily by
institutional investors for periods ranging from a few weeks to more than one
year.  In a standard "swap" transaction, two parties agree to exchange the
returns (or differentials in rates of return) earned or realized on particular
predetermined investments or instruments, which may be adjusted for an interest
factor.  The gross returns to be exchanged or "swapped" between the parties are
generally calculated with respect to a "notional amount," i.e., the return on or
increase in value of a particular dollar amount invested at a particular
interest rate, in a particular foreign currency, or in a "basket" of securities
representing a particular index.  Forms of swap agreements include interest rate
caps, under which, in return for a premium, one party agrees to make payments to
the other to the extent that interest rates exceed a specified rate, or "cap";
interest rate floors, under which, in return for a premium, one party agrees to
make payments to the other to the extent that interest rates fall below a
specified rate, or "floor"; and interest rate collars, under which a party sells
a cap and purchases a floor or vice versa in an attempt to protect itself
against interest rate movements exceeding given minimum or maximum levels.

                                       29
<PAGE>

     Most swap agreements entered into by the Funds would calculate the
obligations of the parties to the agreement on a "net basis."  Consequently, a
Fund's current obligations (or rights) under a swap agreement will generally be
equal only to the net amount to be paid or received under the agreement based on
the relative values of the positions held by each party to the agreement (the
"net amount").  A Fund's current obligations under a swap agreement will be
accrued daily (offset against any amounts owed to the Fund) and any accrued but
unpaid net amounts owed to a swap counterparty will be covered by the
segregation of assets determined to be liquid by PIMCO in accordance with
procedures established by the Board of Trustees, to avoid any potential
leveraging of the Fund's portfolio. Obligations under swap agreements so covered
will not be construed to be "senior securities" for purposes of the Fund's
investment restriction concerning senior securities.  A Fund will not enter into
a swap agreement with any single party if the net amount owed or to be received
under existing contracts with that party would exceed 5% of the Fund's assets.

     Whether a Fund's use of swap agreements will be successful in furthering
its investment objective of total return will depend on PIMCO's ability to
predict correctly whether certain types of investments are likely to produce
greater returns than other investments.  Because they are two party contracts
and because they may have terms of greater than seven days, swap agreements may
be considered to be illiquid. Moreover, a Fund bears the risk of loss of the
amount expected to be received under a swap agreement in the event of the
default or bankruptcy of a swap agreement counterparty.  The Funds will enter
into swap agreements only with counterparties that meet certain standards of
creditworthiness (generally, such counterparties would have to be eligible
counterparties under the terms of the Funds' repurchase agreement guidelines).
Certain restrictions imposed on the Funds by the Internal Revenue Code may limit
the Funds' ability to use swap agreements.  The swaps market is a relatively new
market and is largely unregulated. It is possible that developments in the swaps
market, including potential government regulation, could adversely affect a
Fund's ability to terminate existing swap agreements or to realize amounts to be
received under such agreements.

     Certain swap agreements are exempt from most provisions of the Commodity
Exchange Act ("CEA") and, therefore, are not regulated as futures or commodity
option transactions under the CEA, pursuant to regulations approved by the CFTC
effective February 22, 1993.  To qualify for this exemption, a swap agreement
must be entered into by "eligible participants," which includes the following,
provided the participants' total assets exceed established levels:  a bank or
trust company, savings association or credit union, insurance company,
investment company subject to regulation under the 1940 Act, commodity pool,
corporation, partnership, proprietorship, organization, trust or other entity,
employee benefit plan, governmental entity, broker-dealer, futures commission
merchant, natural person, or regulated foreign person.  To be eligible, natural
persons and most other entities must have total assets exceeding $10 million;
commodity pools and employee benefit plans must have assets exceeding $5
million.  In addition, an eligible swap transaction must meet three conditions.
First, the swap agreement may not be part of a fungible class of agreements that
are standardized as to their material economic terms.  Second, the
creditworthiness of parties with actual or potential obligations under the swap
agreement must be a material consideration in entering into or determining the
terms of the swap agreement, including pricing, cost or credit enhancement
terms.  Third, swap agreements may not be entered into and traded on or through
a multilateral transaction execution facility.

     This exemption is not exclusive, and participants may continue to rely on
existing exclusions for swaps, such as the Policy Statement issued in July 1989
which recognized a safe harbor for swap transactions from regulation as futures
or commodity option transactions under the CEA or its regulations. The Policy
Statement applies to swap transactions settled in cash that (1) have
individually tailored terms, (2) lack exchange-style offset and the use of a
clearing organization or margin system, (3) are undertaken in conjunction with a
line of business, and (4) are not marketed to the public.

     Structured Notes.  Structured notes are derivative debt securities, the
interest rate or principal of which is determined by an unrelated indicator.
Indexed securities include structured notes as well as securities other than
debt securities, the interest rate or principal of which is determined by an
unrelated

                                       30
<PAGE>

indicator. Indexed securities may include a multiplier that multiplies the
indexed element by a specified factor and, therefore, the value of such
securities may be very volatile. To the extent a Fund invests in these
securities, however, PIMCO analyzes these securities in its overall assessment
of the effective duration of the Fund's portfolio in an effort to monitor the
Fund's interest rate risk.

Hybrid Instruments

     A hybrid instrument can combine the characteristics of securities, futures,
and options.  For example, the principal amount or interest rate of a hybrid
could be tied (positively or negatively) to the price of some commodity,
currency or securities index or another interest rate (each a "benchmark").  The
interest rate or (unlike most fixed income securities) the principal amount
payable at maturity of a hybrid security may be increased or decreased,
depending on changes in the value of the benchmark.

     Hybrids can be used as an efficient means of pursuing a variety of
investment goals, including currency hedging, duration management, and increased
total return.  Hybrids may not bear interest or pay dividends.  The value of a
hybrid or its interest rate may be a multiple of a benchmark and, as a result,
may be leveraged and move (up or down) more steeply and rapidly than the
benchmark.  These benchmarks may be sensitive to economic and political events,
such as commodity shortages and currency devaluations, which cannot be readily
foreseen by the purchaser of a hybrid. Under certain conditions, the redemption
value of a hybrid could be zero.  Thus, an investment in a hybrid may entail
significant market risks that are not associated with a similar investment in a
traditional, U.S. dollar-denominated bond that has a fixed principal amount and
pays a fixed rate or floating rate of interest.  The purchase of hybrids also
exposes a Fund to the credit risk of the issuer of the hybrids.  These risks may
cause significant fluctuations in the net asset value of the Fund.  Accordingly,
no Fund will invest more than 5% of its assets in hybrid instruments.

     Certain issuers of structured products such as hybrid instruments may be
deemed to be investment companies as defined in the 1940 Act.  As a result, the
Funds' investments in these products will be subject to limits applicable to
investments in investment companies and may be subject to restrictions contained
in the 1940 Act.

Delayed Funding Loans and Revolving Credit Facilities

     Each Fund (except the Money Market and Municipal Bond Funds) may enter
into, or acquire participations in, delayed funding loans and revolving credit
facilities. Delayed funding loans and revolving credit facilities are borrowing
arrangements in which the lender agrees to make loans up to a maximum amount
upon demand by the borrower during a specified term.  A revolving credit
facility differs from a delayed funding loan in that as the borrower repays the
loan, an amount equal to the repayment may be borrowed again during the term of
the revolving credit facility.  Delayed funding loans and revolving credit
facilities usually provide for floating or variable rates of interest. These
commitments may have the effect of requiring a Fund 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 a Fund is committed to advance
additional funds, it will at all times 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.

     The Funds may invest in delayed funding loans and revolving credit
facilities with credit quality comparable to that of issuers of its securities
investments. Delayed funding loans and revolving credit facilities may be
subject to restrictions on transfer, and only limited opportunities may exist to
resell such instruments. As a result, a Fund may be unable to sell such
investments at an opportune time or may have to resell them at less than fair
market value. The Funds currently intend to treat delayed funding loans and
revolving credit facilities for which there is no readily available market as
illiquid for purposes of the Funds' limitation on illiquid investments.  For a
further discussion of the risks involved in investing in loan participations and
other forms of direct indebtedness see "Loan Participations."  Participation

                                       31
<PAGE>

interests in revolving credit facilities will be subject to the limitations
discussed in "Loan Participations."  Delayed funding loans and revolving credit
facilities are considered to be debt obligations for purposes of the Trust's
investment restriction relating to the lending of funds or assets by a
Portfolio.

When-Issued, Delayed Delivery and Forward Commitment Transactions

     Each of the Funds may purchase or sell securities on a when-issued, delayed
delivery, or forward commitment basis.  When such purchases are outstanding, the
Fund will segregate until the settlement date assets determined to be liquid by
PIMCO in accordance with procedures established by the Board of Trustees, in an
amount sufficient to meet the purchase price.  Typically, no income accrues on
securities a Fund has committed to purchase prior to the time delivery of the
securities is made, although a Fund may earn income on securities it has
segregated.

     When purchasing a security on a when-issued, delayed delivery, or forward
commitment basis, the Fund assumes the rights and risks of ownership of the
security, including the risk of price and yield fluctuations, and takes such
fluctuations into account when determining its net asset value.  Because the
Fund is not required to pay for the security until the delivery date, these
risks are in addition to the risks associated with the Fund's other investments.
If the Fund remains substantially fully invested at a time when when-issued,
delayed delivery, or forward commitment purchases are outstanding, the purchases
may result in a form of leverage.

     When the Fund has sold a security on a when-issued, delayed delivery, or
forward commitment basis, the Fund does not participate in future gains or
losses with respect to the security.  If the other party to a transaction fails
to deliver or pay for the securities, the Fund could miss a favorable price or
yield opportunity or could suffer a loss.  A Fund may dispose of or renegotiate
a transaction after it is entered into, and may sell when-issued, delayed
delivery or forward commitment securities before they are delivered, which may
result in a capital gain or loss.  There is no percentage limitation on the
extent to which the Funds may purchase or sell securities on a when-issued,
delayed delivery, or forward commitment basis.

Short Sales

     Certain of the Funds, particularly the StocksPLUS Short Strategy Fund, may
make short sales of securities as part of their overall portfolio management
strategies involving the use of derivative instruments and to offset potential
declines in long positions in similar securities.  A short sale is a transaction
in which a Fund sells a security it does not own in anticipation that the market
price of that security will decline.

     When a Fund makes a short sale, it must borrow the security sold short and
deliver it to the broker-dealer through which it made the short sale as
collateral for its obligation to deliver the security upon conclusion of the
sale.  The Fund may have to pay a fee to borrow particular securities and is
often obligated to pay over any accrued interest and dividends on such borrowed
securities.

     If the price of the security sold short increases between the time of the
short sale and the time and the Fund replaces the borrowed security, the Fund
will incur a loss; conversely, if the price declines, the Fund will realize a
capital gain.  Any gain will be decreased, and any loss increased, by the
transaction costs described above.  The successful use of short selling may be
adversely affected by imperfect correlation between movements in the price of
the security sold short and the securities being hedged.

     To the extent that a Fund engages in short sales, it will provide
collateral to the broker-dealer and (except in the case of short sales "against
the box") will maintain additional asset coverage in the form of segregated
assets determined to be liquid by PIMCO in accordance with procedures
established by the Board of Trustees.  Each Fund, except the StocksPLUS Short
Strategy Fund, does not intend to enter into short sales (other than those
"against the box") if immediately after such sale the aggregate of the value of

                                       32
<PAGE>

all collateral plus the amount of the segregated assets exceeds one-third of the
value of the Fund's net assets.  This percentage may be varied by action of the
Trustees.  A short sale is "against the box" to the extent that the Fund
contemporaneously owns, or has the right to obtain at no added cost, securities
identical to those sold short.  The Funds will engage in short selling to the
extent permitted by the 1940 Act and rules and interpretations thereunder.

Illiquid Securities

     The Funds may invest up to 15% of their net assets in illiquid securities
(10% in the case of the Money Market Fund).  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 Fund has
valued the securities.  Illiquid securities are considered to include, among
other things, written over-the-counter options, securities or other liquid
assets being used as cover for such options, repurchase agreements with
maturities in excess of seven days, certain loan participation interests, fixed
time deposits which are not subject to prepayment or provide for withdrawal
penalties upon prepayment (other than overnight deposits), and other securities
whose disposition is restricted under the federal securities laws (other than
securities issued pursuant to Rule 144A under the 1933 Act and certain
commercial paper that PIMCO has determined to be liquid under procedures
approved by the Board of Trustees).

     Illiquid securities may include privately placed securities, which are sold
directly to a small number of investors, usually institutions.  Unlike public
offerings, such securities are not registered under the federal securities laws.
Although certain of these securities may be readily sold, others may be
illiquid, and their sale may involve substantial delays and additional costs.

Loans of Portfolio Securities

     For the purpose of achieving income, each Fund may lend its portfolio
securities to brokers, dealers, and other financial institutions, provided:  (i)
the loan is secured continuously by collateral consisting of U.S. Government
securities, cash or cash equivalents (negotiable certificates of deposits,
bankers' acceptances or letters of credit) maintained on a daily mark-to-market
basis in an amount at least equal to the current market value of the securities
loaned; (ii) the Fund may at any time call the loan and obtain the return of the
securities loaned; (iii) the Fund will receive any interest or dividends paid on
the loaned securities; and (iv) the aggregate market value of securities loaned
will not at any time exceed 331/3% of the total assets of the Fund.

Social Investment Policies

     The Low Duration Fund III and Total Return Fund III will not, as a matter
of non-fundamental operating policy, invest in the securities of any issuer
determined by PIMCO to be engaged principally in the provision of healthcare
services, the manufacture of alcoholic beverages, tobacco products,
pharmaceuticals, military equipment, or the operation of gambling casinos.  The
Funds will also avoid, to the extent possible on the basis of information
available to PIMCO, the purchase of securities of issuers engaged in the
production or trade of pornographic materials.  An issuer will be deemed to be
principally engaged in an activity if it derives more than 10% of its gross
revenues from such activities. Evaluation of any particular issuer with respect
to these criteria may involve the exercise of subjective judgment by PIMCO.
PIMCO's determination of issuers engaged in such activities at any given time
will, however, be based upon its good faith interpretation of available
information and its continuing and reasonable best efforts to obtain and
evaluate the most current information available, and to utilize such
information, as it becomes available, promptly and expeditiously in portfolio
management for the Funds. In making its analysis, PIMCO may rely, among other
things, upon information contained in such publications as those produced by the
Investor Responsibility Research Center, Inc.

                                       33
<PAGE>

                            INVESTMENT RESTRICTIONS

Fundamental Investment Restrictions

     Each Fund's investment objective, except for the Global Bond Fund II, as
set forth in the Prospectuses under "Investment Objectives and Policies,"
together with the investment restrictions set forth below, are fundamental
policies of the Fund and may not be changed with respect to a Fund without
shareholder approval by vote of a majority of the outstanding shares of that
Fund.

(1)  A Fund may not concentrate its investments in a particular industry, as
     that term is used in the Investment Company Act of 1940, as amended, and as
     interpreted, modified, or otherwise permitted by regulatory authority
     having jurisdiction, from time to time (except that the Money Market Fund
     may concentrate its investments in securities or obligations issued by U.S.
     banks).

(2)  A Fund may not, with respect to 75% of the Fund's total assets, purchase
     the securities of any issuer, except securities issued or guaranteed by the
     U.S. government or any of its agencies or instrumentalities, if, as a
     result (i) more than 5% of the Fund's total assets would be invested in the
     securities of that issuer, or (ii) the Fund would hold more than 10% of the
     outstanding voting securities of that issuer; (This investment restriction
     is not applicable to the Real Return Bond, Commercial Mortgage Securities,
     Global Bond, Global Bond II, Foreign Bond, Emerging Markets Bond,
     California Intermediate Municipal Bond and New York Intermediate Municipal
     Bond Funds.). For the purpose of this restriction, each state and each
     separate political subdivision, agency, authority or instrumentality of
     such state, each multi-state agency or authority, and each guarantor, if
     any, are treated as separate issuers of Municipal Bonds.

(3)  A Fund may not purchase or sell real estate, although it may purchase
     securities secured by real estate or interests therein, or securities
     issued by companies which invest in real estate, or interests therein.

(4)  A Fund may not purchase or sell commodities or commodities contracts or
     oil, gas or mineral programs.  This restriction shall not prohibit a Fund,
     subject to restrictions described in the Prospectuses and elsewhere in this
     Statement of Additional Information, from purchasing, selling or entering
     into futures contracts, options on futures contracts, foreign currency
     forward contracts, foreign currency options, or any interest rate,
     securities-related or foreign currency-related hedging instrument,
     including swap agreements and other derivative instruments, subject to
     compliance with any applicable provisions of the federal securities or
     commodities laws (This restriction is not applicable to the Global Bond
     Fund II, but see non-fundamental restriction "F".).

(5)  A Fund may borrow money or issue any senior security, only as permitted
     under the Investment Company Act of 1940, as amended, and as interpreted,
     modified, or otherwise permitted by regulatory authority having
     jurisdiction, from time to time.

(6)  A Fund may make loans only as permitted under the Investment Company Act of
     1940, as amended, and as interpreted, modified, or otherwise permitted by
     regulatory authority having jurisdiction, from time to time.

(7)  A Fund may not act as an underwriter of securities of other issuers, except
     to the extent that in connection with the disposition of portfolio
     securities, it may be deemed to be an underwriter under the federal
     securities laws.

(8)  Notwithstanding any other fundamental investment policy or limitation, it
     is a fundamental policy of each Fund that it may pursue its investment
     objective by investing in one or more underlying investment companies or
     vehicles that have substantially similar investment objectives, policies
     and limitations as the Fund.

                                       34
<PAGE>

Non-Fundamental Investment Restrictions

     Each Fund is also subject to the following non-fundamental restrictions and
policies (which may be changed without shareholder approval) relating to the
investment of its assets and activities.  Unless otherwise indicated, a Fund may
not:

(A)  (a)  invest more than 15% of the net assets of a Fund (10% in the case of
     the Money Market Fund) (taken at market value at the time of the
     investment) in "illiquid securities," illiquid securities being defined to
     include securities subject to legal or contractual restrictions on resale
     (which may include private placements), repurchase agreements maturing in
     more than seven days, certain loan participation interests, fixed time
     deposits which are not subject to prepayment or provide for withdrawal
     penalties upon prepayment (other than overnight deposits), certain options
     traded over the counter that a Fund has purchased, securities or other
     liquid assets being used to cover such options a Fund has written,
     securities for which market quotations are not readily available, or other
     securities which legally or in PIMCO's opinion may be deemed illiquid
     (other than securities issued pursuant to Rule 144A under the Securities
     Act of 1933 and certain commercial paper that PIMCO has determined to be
     liquid under procedures approved by the Board of Trustees);

     (b) for the Global Bond Fund II, invest in (a) securities which at the time
     of such investment are not readily marketable, (b) securities the
     disposition of which is restricted under federal securities laws, (c)
     repurchase agreements maturing in more than seven days (d) OTC options (to
     the extent described below), and (e) IO/PO stripped mortgage-backed
     securities (as defined in the Prospectuses) if, as a result, more than 15%
     of the Fund's net assets, taken at current value, would then be invested in
     securities described in (a), (b), (c), (d) and (e) above (For the purpose
     of this restriction securities subject to a 7-day put option or convertible
     into readily saleable securities or commodities are not included with
     subsections (a) or (b).); or purchase securities the disposition of which
     is restricted under the federal securities laws (excluding for purposes of
     this restriction securities offered and sold pursuant to Rule 144A of the
     Securities Act of 1933 and Section 4(2) commercial paper) if, as a result,
     such investments would exceed 10% of the value of the net assets of the
     Fund;

(B)  (a)  for the Money Market, Short-Term, Low Duration, Low Duration II, Low
     Duration III, Moderate Duration, Total Return, Total Return II, Commercial
     Mortgage Securities, Long-Term U.S. Government, Long Duration, Short
     Duration Municipal Income, Municipal Bond, California Intermediate
     Municipal Bond, New York Intermediate Municipal Bond, Global Bond, Foreign
     Bond, Strategic Balanced, Convertible and StocksPLUS Short Strategy Funds:
     purchase securities on margin, except for use of short-term credit
     necessary for clearance of purchases and sales of portfolio securities, but
     it may make margin deposits in connection with covered transactions in
     options, futures, options on futures and short positions;

     (b) for the Total Return III, High Yield, and StocksPLUS Funds:  purchase
     securities on margin, except for use of short-term credit necessary for
     clearance of purchases and sales of portfolio securities, but it may make
     margin deposits in connection with transactions in options, futures, and
     options on futures;

     (c) for the Global Bond Fund II, purchase securities on margin, except such
     short-term credits as may be necessary for the clearance of purchases and
     sales of securities (For this purpose, the deposit or payment by the Fund
     of initial or variation margin in connection with futures contracts or
     related options transactions is not considered the purchase of a security
     on margin.);

                                       35
<PAGE>

(C)  invest more than 5% of the assets of a Fund (taken at market value at the
     time of investment) in any combination of interest only, principal only, or
     inverse floating rate securities (This restriction is not applicable to the
     Global Bond Fund II, but see non-fundamental investment restriction (D).);

(D)  for the Global Bond Fund II, borrow money in excess of 10% of the value
     (taken at the lower of cost or current value) of the Fund's total assets
     (not including the amount borrowed) at the time the borrowing is made, and
     then only from banks as a temporary measure to facilitate the meeting of
     redemption requests (not for leverage) which might otherwise require the
     untimely disposition of portfolio investments or for extraordinary or
     emergency purposes (Such borrowings will be repaid before any additional
     investments are purchased.); or pledge, hypothecate, mortgage or otherwise
     encumber its assets in excess of 10% of the Fund's total assets (taken at
     cost) and then only to secure borrowings permitted above (The deposit of
     securities or cash or cash equivalents in escrow in connection with the
     writing of covered call or put options, respectively, is not deemed to be
     pledges or other encumbrances.  For the purpose of this restriction,
     collateral arrangements with respect to the writing of options, futures
     contracts, options on futures contracts, and collateral arrangements with
     respect to initial and variation margin are not deemed to be a pledge of
     assets and neither such arrangements nor the purchase or sale of futures or
     related options are deemed to be the issuance of a senior security.);

(E)  maintain a short position, or purchase, write or sell puts, calls,
     straddles, spreads or combinations thereof, except on such conditions as
     may be set forth in the Prospectuses and in this Statement of Additional
     Information;

(F)  for the Global Bond Fund II, purchase or sell commodities or commodity
     contracts except that the Fund may purchase and sell financial futures
     contracts and related options;

(G)  for the Global Bond Fund II, write (sell) or purchase options except that
     the Fund may (a) write covered call options or covered put options on
     securities that it is eligible to purchase (and on stock indices) and enter
     into closing purchase transactions with respect to such options, and (b) in
     combination therewith, or separately, purchase put and call options on
     securities it is eligible to purchase; provided that the premiums paid by
     the Fund on all outstanding options it has purchased do not exceed 5% of
     its total assets (The Fund may enter into closing sale transactions with
     respect to options it has purchased.).

     Currency Hedging.  In addition, the Trust has adopted a non-fundamental
policy pursuant to which each Fund that may invest in securities denominated in
foreign currencies, except the Global Bond, and Emerging Markets Bond, and
Convertible Funds, will hedge at least 75% of its exposure to foreign currency
using the techniques described in the Prospectuses.  There can be no assurance
that currency hedging techniques will be successful.

     Under the 1940 Act, a "senior security" does not include any promissory
note or evidence of indebtedness where such loan is for temporary purposes only
and in an amount not exceeding 5% of the value of the total assets of the issuer
at the time the loan is made.  A loan is presumed to be for temporary purposes
if it is repaid within sixty days and is not extended or renewed.  To the extent
that borrowings for temporary administrative purposes exceed 5% of the total
assets of a Fund (except the Global Bond Fund II), such excess shall be subject
to the 300% asset coverage requirement.

     To the extent a Fund covers its commitment under a reverse repurchase
agreement (or economically similar transaction) by the segregation of assets
determined to be liquid in accordance with procedures adopted by the Trustees,
equal in value to the amount of the Fund's commitment to repurchase, such an
agreement will not be considered a "senior security" by the Fund and therefore
will not be subject to the 300% asset coverage requirement otherwise applicable
to borrowings by the Fund.

                                       36
<PAGE>

     The staff of the SEC has taken the position that purchased over-the-counter
("OTC") options and the assets used as cover for written OTC options are
illiquid securities.  Therefore, the Funds have adopted an investment policy
pursuant to which a Fund will not purchase or sell OTC options if, as a result
of such transactions, the sum of: 1) the market value of OTC options currently
outstanding which are held by the Fund, 2) the market value of the underlying
securities covered by OTC call options currently outstanding which were sold by
the Fund and 3) margin deposits on the Fund's existing OTC options on futures
contracts,  exceeds 15% of the net assets of the Fund, taken at market value,
together with all other assets of the Fund which are illiquid or are otherwise
not readily marketable.  However, if an OTC option is sold by the Fund to a
primary U.S. Government securities dealer recognized by the Federal Reserve Bank
of New York and if the Fund has the unconditional contractual right to
repurchase such OTC option from the dealer at a predetermined price, then the
Fund will treat as illiquid such amount of the underlying securities equal to
the repurchase price less the amount by which the option is "in-the-money"
(i.e., current market value of the underlying securities minus the option's
strike price). The repurchase price with the primary dealers is typically a
formula price which is generally based on a multiple of the premium received for
the option, plus the amount by which the option is "in-the-money."  This policy
is not a fundamental policy of the Funds and may be amended by the Trustees
without the approval of shareholders. However, the Funds will not change or
modify this policy prior to the change or modification by the SEC staff of its
position.

     Unless otherwise indicated, all limitations applicable to Fund investments
(as stated above and elsewhere in this Statement of Additional Information)
apply only at the time a transaction is entered into. Any subsequent change in a
rating assigned by any rating service to a security (or, if unrated, deemed to
be of comparable quality), or change in the percentage of Fund assets invested
in certain securities or other instruments, or change in the average duration of
a Fund's investment portfolio, resulting from market fluctuations or other
changes in a Fund's total assets will not require a Fund to dispose of an
investment until PIMCO determines that it is practicable to sell or close out
the investment without undue market or tax consequences to the Fund.  In the
event that ratings services assign different ratings to the same security, PIMCO
will determine which rating it believes best reflects the security's quality and
risk at that time, which may be the higher of the several assigned ratings.

     The Funds interpret their policies with respect to borrowing and lending to
permit such activities as may be lawful for the Funds, to the full extent
permitted by the 1940 Act or by exemption from the provisions therefrom pursuant
to exemptive order of the SEC.  The Funds have filed an application seeking an
order from the SEC to permit the Funds to enter into transactions among
themselves with respect to the investment of daily cash balances of the Funds in
shares of the Money Market Fund, as well as the use of daily excess cash
balances of the Money Market Fund in inter-fund lending transactions with the
other Funds for temporary cash management purposes.  The interest paid by a Fund
in such an arrangement will be less than that otherwise payable for an overnight
loan, and will be in excess of the overnight rate the Money Market Fund could
otherwise earn as lender in such a transaction.

Non-Fundamental Operating Policies Relating to the Sale of Shares of Total
Return Fund in Japan

     In connection with an offering of Administrative Class shares of the Total
Return Fund in Japan, the Trust has adopted the following non-fundamental
operating policies (which may be changed without shareholder approval) with
respect to the Total Return Fund.  These non-fundamental policies will remain in
effect only so long as (i) they are required in accordance with standards of the
Japanese Securities Dealers Association and (ii) shares of the Total Return Fund
are being offered in Japan.

(1)  The Trust will not sell shares of the Total Return Fund in Japan except
     through PIMCO Funds Distributors LLC.

                                       37
<PAGE>

(2)  The Trust has appointed, and will maintain the appointment of, a bank or
     trust company as the place for safe-keeping of its assets in connection
     with the Total Return Fund.

(3)  The Tokyo District Court shall have the jurisdiction over any and all
     litigation related to transactions in any class of shares of the Total
     Return Fund acquired by Japanese investors as required by Article 26, Item
     4 of the Rules Concerning Transactions of Foreign Securities of the Japan
     Securities Dealers Association.

(4)  The Total Return Fund may not make short sales of securities or maintain a
     short position for the account of the Fund unless the total current value
     of the securities being the subject of short sales or of the short position
     is equal to or less than the net asset value of the Total Return Fund.

(5)  The Total Return Fund may not borrow money in excess of 10% of the value
     (taken at the lower of cost or current value) of its total assets (not
     including the amount borrowed) at the time the borrowing is made, except
     for extraordinary or emergency purposes, such as in the case of a merger,
     amalgamation or the like.

(6)  The Total Return Fund may not acquire more than 50% of the outstanding
     voting securities of any issuer, if aggregated with the portion of holding
     in such securities by any and all other mutual funds managed by PIMCO.

(7)  The Total Return Fund may not invest more than 15% of its total assets in
     voting securities privately placed, mortgage securities or unlisted voting
     securities which cannot be readily disposed of.  This restriction shall not
     be applicable to securities determined by PIMCO to be liquid and for which
     a market price (including a dealer quotation) is generally obtainable or
     determinable.

(8)  None of the portfolio securities of the Total Return Fund may be purchased
     from or sold or loaned to any Trustee of the Trust, PIMCO, acting as
     investment adviser of the Trust, or any affiliate thereof or any of their
     directors, officers or employees, or any major shareholder thereof (meaning
     a shareholder who holds to the actual knowledge of PIMCO, on his own
     account whether in his own or other name (as well as a nominee's name), 10%
     or more of the total issued outstanding shares of such a company) acting as
     principal or for their own account unless the transaction is made within
     the investment restrictions set forth in the Fund's prospectus and
     statement of additional information and either (i) at a price determined by
     current publicly available quotations (including a dealer quotation) or
     (ii) at competitive prices or interest rates prevailing from time to time
     on internationally recognized securities markets or internationally
     recognized money markets (including a dealer quotation).

     All percentage limitations on investments described in the restrictions
relating to the sale of shares in Japan will apply at the time of the making of
an investment and shall not be considered violated unless an excess or
deficiency occurs or exists immediately after and as a result of such
investment.  If any violation of the foregoing investment restrictions occurs,
the Trust will, promptly after discovery of the violation, take such action as
may be necessary to cause the violation to cease, which shall be the only
obligation of the Trust and the only remedy in respect of the violation.

     If any of the foregoing standards shall, at any time when shares of the
Total Return Fund are being offered for subscription by the Trust in Japan or
thereafter, no longer be required in accordance with the standards of the
Japanese Securities Dealers Association, then such standards shall no longer
apply.

                                       38
<PAGE>

                            MANAGEMENT OF THE TRUST

Trustees and Officers

     The business of the Trust is managed under the direction of the Trust's
Board of Trustees.  Subject to the provisions of the Trust's Declaration of
Trust, its By-Laws and Massachusetts law, the Trustees have all powers necessary
and convenient to carry out this responsibility, including the election and
removal of the Trust's officers.

     The Trustees and Executive Officers of the Trust, their ages, their
business address and a description of their principal occupations during the
past five years are listed below.  Unless otherwise indicated, the address of
all persons below is 840 Newport Center Drive, Suite 300, Newport Beach,
California 92660.


<TABLE>
<CAPTION>
                                           Position with                        Principal Occupation(s)
Name, Address and Age                        the Trust                          During the Past Five Years
- ---------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                             <C>
Brent R. Harris*                       Chairman of the Board and       Managing Director, PIMCO; Board of Governors,
Age 40                                 Trustee                         Investment Company Institute; Chairman and
                                                                       Director, PIMCO Commercial Mortgage
                                                                       Securities Trust, Inc.; Chairman and Trustee,
                                                                       PIMCO Variable Insurance Trust.

R. Wesley Burns*                       President and Trustee           Managing Director, PIMCO; President and
Age 40                                                                 Director, PIMCO Commercial Mortgage
                                                                       Securities Trust, Inc.; President and
                                                                       Trustee, PIMCO Variable Insurance Trust;
                                                                       Executive Vice President, PIMCO Funds:
                                                                       Multi-Manager Series. Formerly Executive Vice
                                                                       President, PIMCO.

Guilford C. Babcock                    Trustee                         Associate Professor of Finance, University of
1500 Park Place                                                        Southern California; Director, PIMCO
San Marino, California 91108                                           Commercial Mortgage Securities Trust, Inc.;
Age 68                                                                 Trustee, PIMCO Variable Insurance Trust;
                                                                       Director, Growth Fund of America and
                                                                       Fundamental Investors Fund of the Capital
                                                                       Group; Director, Good Hope Medical Foundation.
</TABLE>

                                       39
<PAGE>

<TABLE>
<CAPTION>
                                           Position with                        Principal Occupation(s)
Name, Address and Age                        the Trust                          During the Past Five Years
- ---------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                             <C>
E. Philip Cannon                       Trustee                         Proprietor, Cannon & Company, an affiliate of
3838 Olympia                                                           Inverness Management LLC, a private equity
Houston, Texas 77019                                                   investment firm; Trustee of PIMCO Funds:
Age 59                                                                 Multi-Manager Series.  Formerly, Headmaster,
                                                                       St. John's School, Houston, Texas; Trustee of
                                                                       PIMCO Advisors Funds ("PAF") and Cash
                                                                       Accumulation Trust ("CAT"); General Partner,
                                                                       J.B. Poindexter & Co., Houston, Texas, a
                                                                       private equity investment firm; and Partner,
                                                                       Iberia Petroleum Company, an oil and gas
                                                                       production company.

Vern O. Curtis                         Trustee                         Private Investor; Director, PIMCO Commercial
14158 N.W. Bronson Creek Drive                                         Mortgage Securities Trust, Inc.; Trustee,
Portland, Oregon 97229                                                 PIMCO Variable Insurance Trust; Director,
Age 65                                                                 Public Storage Business Parks, Inc., a Real
                                                                       Estate Investment Trust; Director, Fresh
                                                                       Choice, Inc. (restaurant company)  Formerly
                                                                       charitable work, The Church of Jesus Christ
                                                                       of Latter-day Saints.

J. Michael Hagan                       Trustee                         Retired from Furon Company (manufacturing)
6 Merced                                                               where he served as Chairman and CEO from June
San Clemente, California 92673                                         1991 to November 1999, and in other
Age 60                                                                 capacities since 1967.  He was previously
                                                                       associated with Ross Laboratories and
                                                                       Standard Oil of California.  Mr. Hagan serves
                                                                       on the Boards of Directors for Ameron
                                                                       International (manufacturing), Freedom
                                                                       Communications, Remedy Temp (staffing) and
                                                                       Saint-Gobain Company.  He is also a member of
                                                                       the Board of Regents at Santa Clara
                                                                       University, the Board of Taller San Jose, and
                                                                       the Board of Trustees of the South Coast
                                                                       Repertory Theater.

Thomas P. Kemp                         Trustee                         Private Investor; Director, PIMCO Commercial
1141 Marine Drive                                                      Mortgage Securities Trust, Inc.; Trustee,
Laguna Beach, California 92651                                         PIMCO Variable Insurance Trust. Formerly
Age 69                                                                 Co-Chairman, U.S. Committee to Assist Russian
                                                                       Reform; Director, Union Financial Corp.;
                                                                       Senior Consultant, World Cup 1994 Organizing
                                                                       Committee.
</TABLE>

                                       40
<PAGE>

<TABLE>
<CAPTION>
                                           Position with                        Principal Occupation(s)
Name, Address and Age                        the Trust                          During the Past Five Years
- ---------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                             <C>
William J. Popejoy                     Trustee                         President, Pacific Capital Investors;
29 Chatham Court                                                       Chairman, PacPro (vinyl assembly products;
Newport Beach, California 92660                                        formerly Western Printing); Director, PIMCO
Age 61                                                                 Commercial Mortgage Securities Trust, Inc.;
                                                                       Trustee, PIMCO Variable Insurance Trust.
                                                                       Formerly Director, California State Lottery;
                                                                       Chief Executive Officer, Orange County,
                                                                       California.

Michael G. Dow                         Senior Vice President           Senior Vice President, PIMCO.  Formerly Fixed
Age 36                                                                 Income Specialist, Salomon Brothers, Inc.;
                                                                       Vice President Operations, Citibank NA Global
                                                                       Consumer Banking Group.

William H. Gross                       Senior Vice President           Managing Director, PIMCO; Senior Vice
Age 55                                                                 President, PIMCO Variable Insurance Trust.

Margaret Isberg                        Senior Vice President           Managing Director, PIMCO.
Age 43

Jeffrey M. Sargent                     Senior Vice President           Senior Vice President and Manager of
Age 37                                                                 Investment Operations Shareholder Services,
                                                                       PIMCO; Senior Vice President, PIMCO
                                                                       Commercial Mortgage Securities Trust, Inc.
                                                                       and PIMCO Variable Insurance Trust; Vice
                                                                       President, PIMCO Funds: Multi-Manager Series.
                                                                       Formerly, Vice President, PIMCO.

Leland T. Scholey                      Senior Vice President           Senior Vice President, PIMCO.  Formerly Vice
Age 47                                                                 President, PIMCO.

Raymond C. Hayes                       Vice President                  Vice President, PIMCO.  Formerly Marketing
Age 55                                                                 Director, Pacific Financial Asset Management
                                                                       Corporation.

Thomas J. Kelleher, III                Vice President                  Vice President, PIMCO.  Previously associated
Age 49                                                                 with Delaware Trust, Mellon Bank and Girard
                                                                       Trust (bank trust departments).

Henrik P. Larsen                       Vice President                  Vice President and Manager, Fund
Age 30                                                                 Administration, PIMCO; Vice President, PIMCO
                                                                       Commercial Mortgage Securities Trust, Inc.
                                                                       and PIMCO Variable Insurance Trust. Formerly
                                                                       Supervisor, PIMCO.
</TABLE>

                                       41
<PAGE>

<TABLE>
<CAPTION>
                                           Position with                        Principal Occupation(s)
Name, Address and Age                        the Trust                          During the Past Five Years
- ---------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                             <C>
Daniel T. Ludwig                       Vice President                  Account Manager, PIMCO. Formerly Vice
Age 41                                                                 President, Fidelity Investments;
                                                                       Institutional Sales Representative, CS First
                                                                       Boston.

Andre Mallegol                         Vice President                  Vice President, PIMCO.  Formerly associated
Age 33                                                                 with Fidelity Investments Institutional
                                                                       Services Company.

Scott Millimet                         Vice President                  Vice President, PIMCO.  Formerly Executive
Age 42                                                                 Vice President with Back Bay Advisors.

James F. Muzzy                         Vice President                  Managing Director, PIMCO; Senior Vice
Age 60                                                                 President, PIMCO Variable Insurance Trust.

Douglas J. Ongaro                      Vice President                  Vice President, PIMCO.  Formerly Regional
Age 39                                                                 Marketing Manager, Charles Schwab & Co., Inc.

David J. Pittman                       Vice President                  Vice President, PIMCO.  Formerly a senior
Age 52                                                                 executive with Bank of America, the Northern
                                                                       Trust Co. and NationsBank.

Mark A. Romano                         Vice President                  Vice President, PIMCO.  Previously associated
Age 41                                                                 with Wells Fargo's institutional money
                                                                       management group and First Interstate's
                                                                       Pacifica family of mutual funds.

William S. Thompson, Jr.               Vice President                  Chief Executive Officer and Managing
Age 54                                                                 Director, PIMCO; Senior Vice President, PIMCO
                                                                       Variable Insurance Trust; Vice President,
                                                                       PIMCO Commercial Mortgage Securities Trust,
                                                                       Inc.

John P. Hardaway                       Treasurer                       Senior Vice President and Manager of
Age 42                                                                 Investment Operations Accounting, PIMCO;
                                                                       Treasurer, PIMCO Commercial Mortgage
                                                                       Securities Trust, Inc., PIMCO Funds:
                                                                       Multi-Manager Series and PIMCO Variable
                                                                       Insurance Trust.  Formerly Vice President,
                                                                       PIMCO.
</TABLE>

                                       42
<PAGE>

<TABLE>
<CAPTION>
                                           Position with                        Principal Occupation(s)
Name, Address and Age                        the Trust                          During the Past Five Years
- ---------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                             <C>
Garlin G. Flynn                        Secretary                       Specialist, PIMCO; Secretary, PIMCO
Age 53                                                                 Commercial Mortgage Securities Trust, Inc.
                                                                       and PIMCO Variable Insurance Trust; Assistant
                                                                       Secretary, PIMCO Funds: Multi-Manager Series.
                                                                       Formerly Senior Fund Administrator, PIMCO;
                                                                       Senior Mutual Fund Analyst, PIMCO Advisors
                                                                       Institutional Services.

Joseph D. Hattesohl                    Assistant Treasurer             Vice President and Manager of Financial
Age 36                                                                 Reporting and Taxation, PIMCO; Assistant
                                                                       Treasurer, PIMCO Funds: Multi-Manager Series,
                                                                       PIMCO Commercial Mortgage Securities Trust,
                                                                       Inc. and PIMCO Variable Insurance Trust.
                                                                       Formerly, Manager of Fund Taxation, PIMCO;
                                                                       Director of Financial Reporting, Carl I.
                                                                       Brown & Co.

Michael J. Willemsen                   Assistant Secretary             Manager, PIMCO; Assistant Secretary, PIMCO
Age 40                                                                 Commercial Mortgage Securities Trust, Inc.
                                                                       and PIMCO Variable Insurance Trust.  Formerly
                                                                       Project Lead, PIMCO.

</TABLE>
___________________
     *Each of Mr. Harris and Mr. Burns is an "interested person" of the Trust
(as that term is defined in the 1940 Act) because of his affiliations with
PIMCO.


Compensation Table

     The following table sets forth information regarding compensation received
by the Trustees for the fiscal year ended March 31, 1999.

                                       43
<PAGE>

<TABLE>
<CAPTION>

                               Aggregate     Total Compensation from
                              Compensation   Trust and Fund Complex
    Name and Position         from Trust/1/    Paid to Trustees/2/
- ---------------------------   ------------   -----------------------
<S>                           <C>            <C>

      Guilford C. Babcock           $58,000                  $ 78,750
      Trustee

      E. Philip Cannon                    0                   $57,000/3/
      Trustee

      Vern O. Curtis                $59,500                  $ 82,619
      Trustee

      J. Michael Hagan                    0                         0
      Trustee

      Thomas P. Kemp                $58,000                  $ 78,750
      Trustee

      William J. Popejoy            $58,000                  $ 78,750
      Trustee
</TABLE>

1 Each Trustee, other than those affiliated with PIMCO or its affiliates,
  receives an annual retainer of $45,000 plus $3,000 for each Board of Trustees
  meeting attended in person and $500 for each meeting attended telephonically,
  plus reimbursement of related expenses.  In addition, a Trustee serving as a
  Committee Chair, other than those affiliated with PIMCO or its affiliates,
  receives an additional annual retainer of $1,500. For the fiscal year ended
  March 31, 1999, the unaffiliated Trustees as a group received compensation in
  the amount of $234,297.

2 Each Trustee also serves as a Director of PIMCO Commercial Mortgage Securities
  Trust, Inc., a registered closed-end management investment company, and as a
  Trustee of PIMCO Variable Insurance Trust, a registered open-end management
  investment company.  For their services to PIMCO Commercial Mortgage
  Securities Trust, Inc., the Directors listed above received an annual retainer
  of $6,000 plus $1,000 for each Board of Directors meeting attended in person
  and $500 for each meeting attended telephonically, plus reimbursement of
  related expenses. In addition, a Director serving as a Committee Chair, other
  than those affiliated with PIMCO or its affiliates, receives an additional
  annual retainer of $500. For the fiscal year ended December 31, 1999, the
  unaffiliated Directors as a group received compensation in the amount of
  $42,786.

  The Trustees listed above, for their services as Trustees of PIMCO Variable
  Insurance Trust, receive an annual retainer of $4,000 plus $1,500 for each
  Board of Trustees meeting attended in person and $500 for each meeting
  attended telephonically, plus reimbursement of related expenses.  In addition,
  a Trustee serving as a Committee Chair, other than those affiliated with PIMCO
  or its affiliates, receives an additional annual retainer of $500.  For the
  fiscal year ended December 31, 1999, the unaffiliated Trustees as a group
  received compensation in the amount of $41,786.

3 Mr. Cannon also serves as a Trustee of PIMCO Funds:  Multi-Manager Series
  which has adopted a deferred compensation plan.  Mr. Cannon elected to have
  $57,000 in compensation deferred from that Trust.

Investment Adviser

  PIMCO serves as investment adviser to the Funds pursuant to an investment
advisory contract ("Advisory Contract") between PIMCO and the Trust.  PIMCO is a
subsidiary partnership of PIMCO

                                       44
<PAGE>

     Advisors. The general partners of PIMCO Advisors are PIMCO Partners, G.P.
and PIMCO Advisors Holdings L.P. ("PAH"). PIMCO Partners, G.P. is a general
partnership between PIMCO Holding LLC, a Delaware limited liability company and
an indirect wholly-owned subsidiary of Pacific Life Insurance Company, and PIMCO
Partners LLC, a California limited liability company controlled by the current
Managing Directors and two former Managing Directors of PIMCO. PIMCO Partners,
G.P. is the sole general partner of PAH.

     PIMCO is responsible for making investment decisions and placing orders for
the purchase and sale of the Trust's investments directly with the issuers or
with brokers or dealers selected by it in its discretion. See "Portfolio
Transactions." PIMCO also furnishes to the Board of Trustees, which has overall
responsibility for the business and affairs of the Trust, periodic reports on
the investment performance of each Fund.

     On October 31, 1999, PIMCO Advisors, PAH and PIMCO Partners G.P., certain
of their affiliates, Allianz of America, Inc. ("Allianz of America") and certain
other parties named therein entered into an Implementation and Merger Agreement
(the "Merger Agreement") pursuant to which Allianz of America agreed to acquire
majority ownership of PIMCO Advisors and its subsidiaries, including PIMCO (the
"Transaction"). At the closing of the Transaction contemplated by the Merger
Agreement, Allianz of America will acquire approximately 70% of the outstanding
partnership interests in PIMCO Advisors, including the approximately 44%
interest held by PAH. Pacific Life Insurance Company ("Pacific Life"), which
through subsidiaries owns approximately a 30% interest in an indirect general
partner of PIMCO Advisors, will retain an indirect interest in PIMCO Advisors
following the closing of the Transaction. In connection with the Transaction,
Allianz of America will enter into a put/call arrangement for the possible
disposition of Pacific Life's indirect investment in PIMCO Advisors. The
Transaction is expected to be completed on or about May 5, 2000, although there
is no assurance that the Transaction will be completed.

     Allianz AG, the parent of Allianz of America, is a publicly traded German
company which, together with its subsidiaries, comprises the world's second
largest insurance company as measured by premium income.  Allianz AG is a
leading provider of financial services, particularly in Europe, and is
represented in 68 countries world-wide through subsidiaries, branch and
representative offices, and other affiliated entities.  The Allianz Group
currently has assets under management of more than $390 billion, and in its last
fiscal year wrote approximately $50 billion in gross insurance premiums.  After
consummation of the Transaction, PIMCO and Allianz Group combined will have over
$650 billion in assets under management.

     Significant institutional shareholders of Allianz AG currently include
Dresdner Bank AG, Deutsche Bank AG, Munich Reinsurance and HypoVereinsbank.
Dresdner Bank AG and Deutsche Bank AG, as well as certain broker-dealers that
might be controlled by or affiliated with these entities, such as Bankers Trust
Company, BT Alex Brown, Inc., Deutsche Bank Securities, Inc. and Dresdner
Klienwort Benson North America LLC (collectively, the "Affiliated Brokers"), may
be considered to be affiliated persons of PIMCO. Once the Transaction is
consummated, absent an SEC exemption or other relief, the Funds generally would
be precluded from effecting principal transactions with the Affiliated Brokers,
and their ability to purchase securities being underwritten by an Affiliated
Broker or to utilize the Affiliated Brokers for agency transactions would be
subject to restrictions. PIMCO does not believe that the restrictions on
transactions with the Affiliated Brokers described above will materially
adversely affect its ability, post-closing, to provide services to the Funds,
the Funds' ability to take advantage of market opportunities, or the Funds'
overall performance.

     The consummation of the Transaction is subject to the approval of the
public unitholders of PAH, as well as to regulatory and client approvals, and
other conditions customary to transactions of this kind.

                                       45
<PAGE>

  This Statement of Additional Information will be supplemented or revised if
the Allianz Transaction does not occur substantially as set forth above.

  Under the terms of the Advisory Contract, PIMCO is obligated to manage the
Funds in accordance with applicable laws and regulations.  The investment
advisory services of PIMCO to the Trust are not exclusive under the terms of the
Advisory Contract.  PIMCO is free to, and does, render investment advisory
services to others.  The current Advisory Contract was approved by the Board of
Trustees, including a majority of the Trustees who are not parties to the
Advisory Contract or interested persons of such parties ("Independent
Trustees"), at a meeting held on November 22, 1994, as supplemented at meetings
                                                       ------------
held on October 1, 1995, November 21, 1995, February 27, 1996, November 19,
1996, January 14, 1997, May 27, 1997, February 24, 1998, August 25, 1998, May
25, 1999, and December 1, 1999 and was last approved by the Trustees on December
1, 1999 and by shareholders of all then-operational Funds on October 17, 1994
and March 3, 2000.

  The Advisory Contract will continue in effect on a yearly basis provided such
continuance is approved annually (i) by the holders of a majority of the
outstanding voting securities of the Trust or by the Board of Trustees and (ii)
by a majority of the Independent Trustees.  The Advisory Contract may be
terminated without penalty by vote of the Trustees or the shareholders of the
Trust, or by PIMCO, on 60 days' written notice by either party to the contract
and will terminate automatically if assigned.

  PIMCO currently receives a monthly investment advisory fee from each Fund at
an annual rate based on average daily net assets of the Funds as follows:

<TABLE>
<CAPTION>
                                                                                    Advisory
Fund                                                                                Fee Rate
- ----                                                                                --------
<S>                                                                                <C>
Money Market Fund................................................................    0.15%
Short Duration Municipal Income Fund.............................................    0.20%
Commercial Mortgage Securities, Strategic Balanced, Convertible,.................
 StocksPLUS, and StocksPLUS Short Strategy Funds.................................    0.40%
Emerging Markets Bond Fund.......................................................    0.45%
All other Funds..................................................................    0.25%
</TABLE>

     For the fiscal years ended March 31, 1999, 1998, and 1997, the aggregate
amount of the advisory fees paid by each operational Fund was as follows:


<TABLE>
<S>                                               <C>                      <C>                      <C>
                                                   Year Ended               Year Ended               Year Ended
Funds                                                  3/31/99                  3/31/98                  3/31/97
- ------                                             -----------              -----------              -----------
Money Market Fund                                  $   364,480              $   205,384              $    67,626
Short-Term Fund                                      1,163,042                  487,226                  311,485
Low Duration Fund                                    8,636,635                7,416,427                6,877,132
Low Duration Fund II                                 1,060,930                  869,853                  685,047
Low Duration Fund III                                   61,917                   32,700                    6,114
Low Duration Mortgage Fund                               9,728                    5,914                      N/A
Moderate Duration Fund                                 685,876                  294,466                    6,525
Real Return Bond Fund                                   37,011                   18,838                    2,453
Total Return Fund                                   55,229,968               38,327,843               29,232,090
Total Return Fund II                                 2,107,392                1,145,766                1,171,011
Total Return Fund III                                1,045,573                  701,110                  423,216
Total Return Mortgage Fund                               9,766                    5,679                     N/A
High Yield Fund                                      6,323,956                3,670,999                1,983,580
</TABLE>

                                       46
<PAGE>

<TABLE>
<CAPTION>
<S>                                                  <C>                     <C>                      <C>
Long-Term U.S. Government Fund                         419,981                  117,242                   64,058
Global Bond Fund                                       666,901                  642,260                  423,547
Global Bond Fund II*                                   106,821                   50,123                   41,683
Foreign Bond Fund                                    1,325,590                  811,698                  541,283
Emerging Markets Bond Fund                              19,121                   11,365                      N/A
Municipal Bond Fund                                    107,083                      N/A                      N/A
Strategic Balanced Fund                                201,742                  117,547                   31,660
StocksPLUS Fund                                      3,432,600                1,919,328                  779,413
</TABLE>
____________________

  *The Global Bond Fund II, for the fiscal year ended September 30, 1996, paid
aggregate management fees in the amount of $54,325, pursuant to a management
contract between PIMCO Advisors Funds and PIMCO Advisors, under which PIMCO
Advisors provided or procured investment advisory services for the Fund.  See
"The Reorganization of the PIMCO Global Bond Fund II" for additional
information.

Fund Administrator

  PIMCO also serves as Administrator to the Funds pursuant to an administration
agreement (the "Administration Agreement") with the Trust.  PIMCO provides the
Funds with certain administrative and shareholder services necessary for Fund
operations and is responsible for the supervision of other Fund service
providers.  PIMCO may in turn use the facilities or assistance of its affiliates
to provide certain services under the Administration Agreement, on terms agreed
between PIMCO and such affiliates.  The administrative services provided by
PIMCO include but are not limited to: (1) shareholder servicing functions,
including preparation of shareholder reports and communications, (2) regulatory
compliance, such as reports and filings with the SEC and state securities
commissions, and (3) general supervision of the operations of the Funds,
including coordination of the services performed by the Funds' transfer agent,
custodian, legal counsel, independent accountants, and others.  PIMCO (or an
affiliate of PIMCO) also furnishes the Funds with office space facilities
required for conducting the business of the Funds, and pays the compensation of
those officers, employees and Trustees of the Trust affiliated with PIMCO.  In
addition, PIMCO, at its own expense, arranges for the provision of legal, audit,
custody, transfer agency and other services for the Funds, and is responsible
for the costs of registration of the Trust's shares and the printing of
prospectuses and shareholder reports for current shareholders. PIMCO has
contractually agreed to provide these services, and to bear these expenses, at
the following rates for each Fund (each expressed as a percentage of the Fund's
average daily net assets attributable to its classes of shares on an annual
basis):

                                       47
<PAGE>

<TABLE>
<CAPTION>
                                                                   Administrative Fee Rate
                                                                 ----------------------------
                                                    Institutional and        Class A, B                       Class  J
Fund                                               Administrative Class       Band C          Class D*         and K
- ----                                             ----------------------      --------        ----------       -------
<S>                                              <C>                         <C>            <C>              <C>
Money Market                                               0.20%                0.35%            0.45%           0.25%
Short-Term Fund                                            0.20%                0.35%            0.50%           0.25%
Low Duration and Total Return                              0.18%                0.40%            0.50%           0.25%
    Funds
Moderate Duration Fund                                     0.20%                0.40%            0.65%           0.25%
Short Duration Municipal Income                            0.19%                0.35%            0.60%           0.25%
Municipal Bond Fund                                        0.25%                0.35%            0.60%           0.25%
California Intermediate Municipal Bond                     0.24%                0.35%            0.60%           0.25%
 and New York Intermediate Municipal
 Bond Funds
Global Bond and Global Bond II                             0.30%                0.45%            0.70%           0.30%
    Funds
Foreign Bond Fund                                          0.25%                0.45%            0.70%           0.25%
Emerging Markets Bond Fund                                 0.40%                0.55%            0.80%           0.30%
All other Funds                                            0.25%                0.40%            0.65%           0.25%
</TABLE>
- ---------------------------------
*    As described below, the Administration Agreement includes a plan adopted
     under Rule 12b-1 which provides for the payment of up to .25% of the Class
     D Administrative Fee rate as reimbursement for expenses in respect of
     activities that may be deemed to be primarily intended to result in the
     sale of Class D shares.

  Except for the expenses paid by PIMCO, the Trust bears all costs of its
operations. The Funds are responsible for:  (i) salaries and other compensation
of any of the Trust's executive officers and employees who are not officers,
directors, stockholders, or employees of PIMCO or its subsidiaries or
affiliates; (ii) taxes and governmental fees; (iii) brokerage fees and
commissions and other portfolio transaction expenses; (iv) costs of borrowing
money, including interest expenses; (v) fees and expenses of the Trustees who
are not "interested persons" of PIMCO or the Trust, and any counsel retained
exclusively for their benefit; (vi) extraordinary expenses, including costs of
litigation and indemnification expenses; (vii) expenses, such as organizational
expenses, which are capitalized in accordance with generally accepted accounting
principles; and (viii) any expenses allocated or allocable to a specific class
of shares ("Class-specific expenses").

  Class-specific expenses include distribution and service fees payable with
respect to different classes of shares and administrative fees as described
above, and may include certain other expenses as permitted by the Trust's
Amended and Restated Multi-Class Plan adopted pursuant to Rule 18f-3 under the
1940 Act and subject to review and approval by the Trustees.

  The Administration Agreement may be terminated by the Trustees, or by a vote
of a majority of the outstanding voting securities of the Trust, Fund, or Class
as applicable, at any time on 60 days' written notice.  Following the expiration
of the one-year period commencing with the effectiveness of the Administration
Agreement, it may be terminated by PIMCO, also on 60 days' written notice.

  The Administration Agreement is subject to annual approval by the Board,
including a majority of the Trust's Independent Trustees (as that term is
defined in the 1940 Act).  The current Administration Agreement was approved by
the Board of Trustees, including all of the Independent Trustees at a meeting
held on February 24, 1998, as supplemented on August 25, 1998, February 23, 1999
and May 25, 1999.  In approving the Administration Agreement, the Trustees
determined that:  (1) the Administration Agreement is in the best interests of
the Funds and their shareholders; (2) the services to be performed under the
Agreement are services required for the operation of the Funds; (3) PIMCO is
able to provide,

                                       48
<PAGE>

or to procure, services for the Funds which are at least equal in nature and
quality to services that could be provided by others; and (4) the fees to be
charged pursuant to the Agreement are fair and reasonable in light of the usual
and customary charges made by others for services of the same nature and
quality.

  Under the Administration Agreement, the Administrator or an affiliate may pay
financial service firms a portion of the Class D administration fees in return
for the firms' services (normally not to exceed an annual rate of .35% of a
Fund's average daily net assets attributable to Class D shares purchase through
such firms).  The Administration Agreement includes a plan specific to Class D
shares that has been adopted in conformity with the requirements set forth under
Rule 12b-1 of the 1940 Act to allow for payment of up to .25% per annum of the
Class D administrative fees as reimbursement for expenses in respect of
activities that may be deemed to be primarily intended to result in the sale of
Class D shares.  The principal types of activities for which such payments may
be made are services in connection with the distribution and marketing of Class
D shares and/or the provision of shareholder services.  See "Distribution of
Trust Shares - Plan for Class D Shares."

  For the fiscal years ended March 31, 1999, 1998, and 1997, the aggregate
amount of the administration fees paid by each operational Fund was as follows:

<TABLE>
<S>                                                 <C>                  <C>                  <C>
                                                           Year Ended           Year Ended           Year Ended
Fund                                                           3/31/99              3/31/98              3/31/97
- ----                                                       -----------          -----------          -----------
Money Market Fund                                          $   731,013          $   423,936          $   117,570
Short-Term Fund                                              1,024,794              410,894              249,655
Low Duration Fund                                            6,841,437            5,665,996            5,005,045
Low Duration Fund II                                         1,060,930              869,853              685,047
Low Duration Fund III                                           61,917               32,700                6,114
Low Duration Mortgage Fund                                       9,728                5,914                  N/A
Moderate Duration Fund                                         548,701              235,572                5,220
Real Return Bond Fund                                           48,397               21,841                2,503
Total Return Fund                                           43,425,035           29,219,721           21,266,359
Total Return Fund II                                         2,107,391            1,145,766            1,171,011
Total Return Fund III                                        1,045,572              701,110              423,216
Total Return Mortgage Fund                                       9,937                5,679                  N/A
High Yield Fund                                              7,243,110            4,258,485            2,071,177
Long-Term U.S. Government Fund                                 508,159              130,444               64,374
Global Bond Fund                                               800,281              770,719              508,256
Global Bond Fund II*                                           151,390               87,617               14,646
Foreign Bond Fund                                            1,454,801              849,691              540,519
Emerging Markets Bond Fund                                      18,034               10,526                  N/A
Municipal Bond Fund                                            145,118                  N/A                  N/A
Strategic Balanced Fund                                        126,263               73,467               19,788
StocksPLUS Fund                                              2,757,948            1,392,509              491,519
</TABLE>
____________________

  *The Global Bond Fund II, for the fiscal year ended September 30, 1996, paid
aggregate management fees in the amount of $54,325, pursuant to a management
contract between PIMCO Advisors Funds and PIMCO Advisors, under which PIMCO
Advisors provided or procured administrative services for the Fund.  See "The
Reorganization of the PIMCO Global Bond Fund II" for additional information.

                                       49
<PAGE>

                          DISTRIBUTION OF TRUST SHARES

Distributor and Multi-Class Plan

  PIMCO Funds Distributors LLC (the "Distributor") serves as the principal
underwriter of each class of the Trust's shares pursuant to a distribution
contract ("Distribution Contract") with the Trust which is subject to annual
approval by the Board.  The Distributor is a wholly owned subsidiary of PIMCO
Advisors. The Distributor, located at 2187 Atlantic Street, Stamford,
Connecticut 06902, is a broker-dealer registered with the Securities and
Exchange Commission.  The Distribution Contract is terminable with respect to a
Fund or class without penalty, at any time, by the Fund or class by not more
than 60 days' nor less than 30 days' written notice to the Distributor, or by
the Distributor upon not more than 60 days' nor less than 30 days' written
notice to the Trust.  The Distributor is not obligated to sell any specific
amount of Trust shares.

  The Distribution Contract will continue in effect with respect to each Fund
and each class of shares thereof for successive one-year periods, provided that
each such continuance is specifically approved (i) by the vote of a majority of
the Trustees who are not interested persons of the Trust (as defined in the 1940
Act) and who have no direct or indirect financial interest in the Distribution
Contract, the Administration Agreement or the Distribution and/or Servicing
Plans described below; and (ii) by the vote of a majority of the entire Board of
Trustees cast in person at a meeting called for that purpose.  If the
Distribution Contract is terminated (or not renewed) with respect to one or more
Funds or classes thereof, it may continue in effect with respect to any class of
any Fund as to which it has not been terminated (or has been renewed).

  The Trust offers eight classes of shares: Class A, Class B, Class C, Class D,
Class J, Class K, the Institutional Class and the Administrative Class.  Class J
and Class K shares are offered only to non-U.S. investors outside the United
States.

  Class A, Class B and Class C shares of the Trust are offered through firms
("participating brokers") which are members of the National Association of
Securities Dealers, Inc. ("NASD"), and which have dealer agreements with the
Distributor, or which have agreed to act as introducing brokers for the
Distributor ("introducing brokers").

  Class D shares are generally offered to clients of financial service firms,
such as broker-dealers or registered investment advisors, with which the
Distributor has an agreement for the use of PIMCO Funds: Pacific Investment
Management Series in particular investment products, programs or accounts for
which a fee may be charged.

  Institutional Class shares are offered primarily for direct investment by
investors such as pension and profit sharing plans, employee benefit trusts,
endowments, foundations, corporations and high net worth individuals.
(Institutional Class shares may also be offered through certain financial
intermediaries that charge their customers transaction or other fees with
respect to the customer's investment in the Funds.)  Administrative Class shares
are offered primarily through employee benefit plans alliances, broker-dealers,
and other intermediaries, and each Fund pays service or distribution fees to
such entities for services they provide to Administrative Class shareholders.

  Class J and Class K shares are offered through foreign broker dealers, banks
and other financial institutions.  Class J and Class K shares are offered to
non-U.S. investors as well as though various non-U.S. investment products,
programs or accounts for which a fee may be charged by investment intermediaries
in addition to those described in the Prospectus and SAI.

  The Trust has adopted an Amended and Restated Multi-Class Plan ("Multi-Class
Plan") pursuant to Rule 18f-3 under the 1940 Act.  Under the Multi-Class Plan,
shares of each class of each Fund represent an equal pro rata interest in such
Fund and, generally, have identical voting, dividend,

                                       50
<PAGE>

liquidation, and other rights, preferences, powers, restrictions, limitations,
qualifications and terms and conditions, except that: (a) each class has a
different designation; (b) each class of shares bears any class-specific
expenses allocated to it; and (c) each class has exclusive voting rights on any
matter submitted to shareholders that relates solely to its distribution or
service arrangements, and each class has separate voting rights on any matter
submitted to shareholders in which the interests of one class differ from the
interests of any other class.

  Each class of shares bears any class specific expenses allocated to such
class, such as expenses related to the distribution and/or shareholder servicing
of such class.  In addition, each class may, at the Trustees' discretion, also
pay a different share of other expenses, not including advisory or custodial
fees or other expenses related to the management of the Trust's assets, if these
expenses are actually incurred in a different amount by that class, or if the
class receives services of a different kind or to a different degree than the
other classes.  All other expenses are allocated to each class on the basis of
the net asset value of that class in relation to the net asset value of the
particular Fund.  In addition, each class may have a differing sales charge
structure, and differing exchange and conversion features.

Contingent Deferred Sales Charge and Initial Sales Charge

  As described in the Class A, B and C Prospectus under the caption "Investment
Options (Class A, B and C Shares)," a contingent deferred sales charge is
imposed upon certain redemptions of the Class A, Class B and Class C shares. No
contingent deferred sales charge is currently imposed upon redemptions of Class
D, Institutional Class or Administrative Class shares.  Because contingent
deferred sales charges are calculated on a Fund-by-Fund basis, shareholders
should consider whether to exchange shares of one Fund for shares of another
Fund prior to redeeming an investment if such an exchange would reduce the
contingent deferred sales charge applicable to such redemptions.

                                       51
<PAGE>

  During the fiscal years ended March 31, 1999, March 31, 1998 and March 31,
1997, the Distributor received the following aggregate amounts in contingent
deferred sales charges on Class A shares, Class B shares and Class C shares of
the Funds:

<TABLE>
<CAPTION>
                                        Year Ended 3/31/99      Year Ended 3/31/98      Year Ended 3/31/97
                                       ---------------------   ---------------------   ---------------------
<S>                                    <C>                     <C>                     <C>
Class A                                           $   37,142                $ 37,724                 $   670
Class B                                            1,653,443                 694,715                  85,380
Class C                                              543,223                 246,969                  44,409
</TABLE>

  In certain cases described in the Class A, B and C Prospectus, the contingent
deferred sales charge is waived on redemptions of Class A, Class B or Class C
shares for certain classes of individuals or entities on account of (i) the fact
that the Trust's sales-related expenses are lower for certain of such classes
than for classes for which the contingent deferred sales charge is not waived,
(ii) waiver of the contingent deferred sales charge with respect to certain of
such classes is consistent with certain Internal Revenue Code policies
concerning the favored tax treatment of accumulations, and (iii) with respect to
certain of such classes, considerations of fairness, and competitive and
administrative factors.

  As described in the Class A, B and C Prospectus under the caption "Investment
Options (Class A, B and C Shares)," Class A shares of the Trust (except with
respect to the Money Market Fund) are sold pursuant to an initial sales charge,
which declines as the amount of purchase reaches certain defined levels. For the
fiscal years ended March 31, 1999, March 31, 1998, and March 31, 1997, the
dDistributor received an aggregate of $6,227,864, $2,598,104 and $389,133,
respectively, and retained $750,751, $186,443 and $45,871, respectively, in
initial sales charges paid by Class A shareholders of the Trust.

Distribution and Servicing Plans for Class A, Class B and Class C Shares

  As stated in the text of the Class A, B and C Prospectus under the caption
"Management of the Trust--Distribution and Servicing (12b-1) Plans," Class A,
Class B and Class C shares of the Trust are continuously offered through
participating brokers which are members of the NASD and which have dealer
agreements with the Distributor, or which have agreed to act as introducing
brokers.

  Pursuant to separate Distribution and Servicing Plans for Class A, Class B and
Class C shares (the "Retail Plans"), as described in the Class A, B and C
Prospectus, in connection with the distribution of Class B and Class C shares of
the Trust, the Distributor receives certain distribution fees from the Trust,
and in connection with personal services rendered to Class A, Class B and Class
C shareholders of the Trust and the maintenance of shareholder accounts, the
Distributor receives certain servicing fees from the Trust. Subject to the
percentage limitations on these distribution and servicing fees set forth below,
the distribution and servicing fees may be paid with respect to services
rendered and expenses borne in the past with respect to Class A, Class B and
Class C shares as to which no distribution and servicing fees were paid on
account of such limitations. As described in the Class A, B and C Prospectus,
the Distributor pays (i) all or a portion of the distribution fees it receives
from the Trust to participating and introducing brokers, and (ii) all or a
portion of the servicing fees it receives from the Trust to participating and
introducing brokers, certain banks and other financial intermediaries.

  The Distributor makes distribution and servicing payments to participating
brokers and servicing payments to certain banks and other financial
intermediaries in connection with the sale of Class B and Class C shares and
servicing payments to participating brokers, certain banks and other financial
intermediaries in connection with the sale of Class A shares. In the case of
Class A shares, these parties are also compensated based on the amount of the
front-end sales charge reallowed by the Distributor, except in cases where Class
A shares are sold without a front-end sales charge (although the Distributor may
pay brokers additional compensation in connection with sales of Class A shares
without a sales charge). In the case of Class B shares, participating brokers
and other financial intermediaries are compensated by an advance of a sales
commission by the Distributor. In the case of Class C shares, part

                                       52
<PAGE>

or all of the first year's distribution and servicing fee is generally paid at
the time of sale. Pursuant to a Distribution Contract with the Trust, with
respect to each Fund's Class A, Class B and Class C shares, the Distributor
bears various other promotional and sales related expenses, including the cost
of printing and mailing prospectuses to persons other than current shareholders.

     The Retail Plans were adopted pursuant to Rule 12b-l under the 1940 Act and
are of the type known as "compensation" plans. This means that, although the
Trustees of the Trust are expected to take into account the expenses of the
Distributor and its predecessors in their periodic review of the Retail Plans,
the fees are payable to compensate the Distributor for services rendered even if
the amount paid exceeds the Distributor's expenses.

     The distribution fee applicable to Class B and Class C shares may be spent
by the Distributor on any activities or expenses primarily intended to result in
the sale of Class B or Class C shares, respectively, including compensation to,
and expenses (including overhead and telephone expenses) of, financial
consultants or other employees of the Distributor or of participating or
introducing brokers who engage in distribution of Class B or Class C shares,
printing of prospectuses and reports for other than existing Class B or Class C
shareholders, advertising, and preparation, printing and distribution of sales
literature. The servicing fee, applicable to Class A, Class B and Class C shares
of the Trust, may be spent by the Distributor on personal services rendered to
shareholders of the Trust and the maintenance of shareholder accounts, including
compensation to, and expenses (including telephone and overhead expenses) of,
financial consultants or other employees of participating or introducing
brokers, certain banks and other financial intermediaries who aid in the
processing of purchase or redemption requests or the processing of dividend
payments, who provide information periodically to shareholders showing their
positions in a Fund's shares, who forward communications from the Trust to
shareholders, who render ongoing advice concerning the suitability of particular
investment opportunities offered by the Trust in light of the shareholders'
needs, who respond to inquiries from shareholders relating to such services, or
who train personnel in the provision of such services. Distribution and
servicing fees may also be spent on interest relating to unreimbursed
distribution or servicing expenses from prior years.

     Many of the Distributor's sales and servicing efforts involve the Trust as
a whole, so that fees paid by Class A, Class B or Class C shares of any Fund may
indirectly support sales and servicing efforts relating to the other Funds'
shares of the same class. In reporting its expenses to the Trustees, the
Distributor itemizes expenses that relate to the distribution and/or servicing
of a single Fund's shares, and allocates other expenses among the Funds based on
their relative net assets. Expenses allocated to each Fund are further allocated
among its classes of shares annually based on the relative sales of each class,
except for any expenses that relate only to the sale or servicing of a single
class. The Distributor may make payments to brokers (and with respect to
servicing fees only, to certain banks and other financial intermediaries) of up
to the following percentages annually of the average daily net assets
attributable to shares in the accounts of their customers or clients:
<TABLE>
<CAPTION>

                                                  Servicing             Distribution
Class A                                            Fee(1)                  Fee(1)
- ---------------------------------------------------------------------------------------
<S>                                              <C>                    <C>
Money Market Fund                                      0.10%                  N/A
- ---------------------------------------------------------------------------------------
All other Funds                                        0.25%                  None

Class B(2)
- ---------------------------------------------------------------------------------------
All Funds                                              0.25%                  None
</TABLE>

                                       53
<PAGE>

<TABLE>
<S>                                              <C>                    <C>
Class C - Shares purchased on or after 7/1/91(3)
- ---------------------------------------------------------------------------------------
Money Market Fund                                      0.10%                  0.00%
- ---------------------------------------------------------------------------------------
Short-Term and Short Duration Municipal                0.25%                  0.25%
 Income Funds
- ---------------------------------------------------------------------------------------
Low Duration, Real Return Bond,                        0.25%                  0.45%
 Municipal Bond, California Intermediate
 Municipal Bond, New York Intermediate
 Municipal Bond and StocksPLUS Funds
- ---------------------------------------------------------------------------------------
All other Funds                                        0.25%                  0.65%
- ---------------------------------------------------------------------------------------

Class C - Shares purchased before 7/1/91
- ---------------------------------------------------------------------------------------
Money Market Fund                                      0.10%                  0.00%
- ---------------------------------------------------------------------------------------
All other Funds                                        0.25%                  None
- ---------------------------------------------------------------------------------------
</TABLE>

1.   Applies, in part, to Class A, Class B and Class C shares of the Trust
     issued to former shareholders of PIMCO Advisors Funds in connection with
     the reorganizations/mergers of series of PIMCO Advisors Funds as/with Funds
     of the Trust in a transaction which took place on January 17, 1997.
2.   Payable only with respect to shares outstanding for one year or more.
3.   Payable only with respect to shares outstanding for one year or more except
     in the case of shares for which no payment is made to the party at the time
     of sale.

     The Distributor may from time to time pay additional cash bonuses or other
incentives to selected participating brokers in connection with the sale or
servicing of Class A, Class B and Class C shares of the Funds. On some
occasions, such bonuses or incentives may be conditioned upon the sale of a
specified minimum dollar amount of the shares of a Fund and/or all of the Funds
together or a particular class of shares, during a specific period of time. The
Distributor currently expects that such additional bonuses or incentives will
not exceed .50% of the amount of any sale. Pacific Investment Management (in its
capacity as administrator) may also pay participating brokers and other
intermediaries for sub-transfer agency and other services.

     If in any year the Distributor's expenses incurred in connection with the
distribution of Class B and Class C shares and, for Class A, Class B and Class C
shares, in connection with the servicing of shareholders and the maintenance of
shareholder accounts, exceed the distribution and/or servicing fees paid by the
Trust, the Distributor would recover such excess only if the Retail Plan with
respect to such class of shares continues to be in effect in some later year
when the distribution and/or servicing fees exceed the Distributor's expenses.
The Trust is not obligated to repay any unreimbursed expenses that may exist at
such time, if any, as the relevant Retail Plan terminates.

     Each Retail Plan may be terminated with respect to any Fund to which the
Plan relates by vote of a majority of the Trustees who are not interested
persons of the Trust (as defined in the 1940 Act) and who have no direct or
indirect financial interest in the operation of the Plan or the Distribution
Contract ("Disinterested Trustees") or by vote of a majority of the outstanding
voting securities of the relevant class of that Fund. Any change in any Retail
Plan that would materially increase the cost to the class of shares of any Fund
to which the Plan relates requires approval by the affected class of
shareholders of that Fund. The Trustees review quarterly written reports of such
costs and the purposes for which such costs have been incurred. Each Retail Plan
may be amended by vote of the Disinterested Trustees cast in person at a meeting
called for the purpose. As long as the Retail Plans are in effect, selection and
nomination of those Trustees who are not interested persons of the Trust shall
be committed to the discretion of such Disinterested Trustees.

                                       54
<PAGE>

     The Retail Plans will continue in effect with respect to each Fund and each
class of shares thereof for successive one-year periods, provided that each such
continuance is specifically approved (i) by the vote of a majority of the
Disinterested Trustees and (ii) by the vote of a majority of the entire Board of
Trustees cast in person at a meeting called for that purpose.

     The Retail Plans went into effect for the Trust in January 1997. If a
Retail Plan is terminated (or not renewed) with respect to one or more Funds, it
may continue in effect with respect to any class of any Fund as to which it has
not been terminated (or has been renewed).

     The Trustees believe that the Retail Plans will provide benefits to the
Trust. The Trustees believe that the Retail Plans will result in greater sales
and/or fewer redemptions of Trust shares, although it is impossible to know for
certain the level of sales and redemptions of Trust shares that would occur in
the absence of the Retail Plans or under alternative distribution schemes.
Although the Funds' expenses are essentially fixed, the Trustees believe that
the effect of the Retail Plans on sales and/or redemptions may benefit the Trust
by reducing Fund expense ratios and/or by affording greater flexibility to
Portfolio Managers.  From time to time, expenses of the Distributor incurred in
connection with the sale of Class B and Class C shares of the Funds, and in
connection with the servicing of Class B and Class C shareholders of the Funds
and the maintenance of shareholder accounts, may exceed the distribution and
servicing fees collected by the Distributor.  The Trustees consider such
unreimbursed amounts, among other factors, in determining whether to cause the
Funds to continue payments of distribution and servicing fees in the future with
respect to Class B and Class C shares.

Payments Pursuant to Class A Plan

     For the fiscal years ended March 31, 1999, March 31, 1998 and March 31,
1997, the Trust paid the Distributor an aggregate of $3,158,937, $1,180,030 and
$108,294, respectively, pursuant to the Distribution and Servicing Plan for
Class A shares, of which the indicated amounts were attributable to the
following Funds:

<TABLE>
<S>                                            <C>                     <C>                     <C>
                                                    Year Ended              Year Ended              Year Ended
Fund                                                   3/31/99                 3/31/98                 3/31/97
- ------                                              ----------                --------                --------
Money Market Fund                                   $   79,137                $ 38,216                $  5,447
Short-Term Fund                                        123,595                  23,033                     530
Low Duration Fund                                      382,868                 192,859                  27,514
Real Return Fund                                         6,053                   1,143                       0
Total Return Fund                                    1,980,636                 679,157                  47,448
High Yield Fund                                        234,956                 121,858                  15,347
Long-Term U.S. Government Fund                          39,481                   8,199                     396
Global Bond Fund II                                     12,179                  20,868                   9,836
Foreign Bond Fund                                       52,053                  10,245                     127
Emerging Markets Bond Fund                                 498                     316                       0
Municipal Bond                                          14,101                       0                       0
StocksPLUS Fund                                        233,380                  84,136                   1,609
</TABLE>

     During the fiscal year ended March 31, 1999, the amounts collected pursuant
to the Distribution and Servicing Plan for Class A shares were used as follows:
sales commissions and other compensation to sales personnel, $2,527,150;
preparing, printing and distributing sales material and advertising (including
preparing, printing and distributing prospectuses to non-shareholders), and
other expenses (including data processing, legal and operations), $631,787.
These totals, if allocated among (i) compensation and (ii) sales materials and
other expenses for each Fund, were as follows:

                                       55
<PAGE>

<TABLE>
<CAPTION>

                                                                          Sales Material
                                                                             and Other
Fund                                                Compensation             Expenses              Total
- -----                                           --------------------    -------------------  ------------------


<S>                                             <C>                    <C>                   <C>
Money Market Fund                                         $  103,815              $ 25,954           $  129,768
Short-Term Fund                                              109,015                27,254              136,269
Low Duration Fund                                            256,567                64,142              320,709
Real Return Bond Fund                                          8,431                 2,108               10,539
Total Return Fund                                          1,548,329               387,082            1,935,411
High Yield Fund                                              208,082                52,021              260,103
Long-Term U.S. Government Fund                                39,784                 9,946               49,730
Global Bond Fund II                                            3,688                   922                4,610
Foreign Bond Fund                                             39,181                 9,795               48,976
Emerging Markets Bond Fund                                       231                    58                  289
Municipal Bond Fund                                            9,497                 2,374               11,871
StocksPLUS Fund                                              200,530                50,133              250,663
</TABLE>

Payments Pursuant to Class B Plan

  For the fiscal years ended March 31, 1999, March 31, 1998 and March 31, 1997,
the Trust paid the Distributor an aggregate of $8,169,978, $2,884,164 and
$293,036, respectively, pursuant to the Distribution and Servicing Plan for
Class B shares, of which the indicated amounts were attributable to the
following Funds:

<TABLE>
<S>                                      <C>                     <C>                     <C>
                                                   Year Ended              Year Ended              Year Ended
Fund                                                   3/31/99                 3/31/98                 3/31/97
- ------                                              ----------              ----------                --------
Money Market Fund                                   $   86,809              $   27,747                $  4,084
Short-Term Fund                                         21,254                   7,508                     156
Low Duration Fund                                      433,206                  95,153                   9,853
Real Return Fund                                        28,545                   9,701                     256
Total Return Fund                                    3,372,168               1,153,121                 140,575
High Yield Fund                                      2,065,488               1,013,423                 110,003
Long-Term U.S. Government Fund                         229,521                  28,337                     361
Global Bond Fund II                                     11,000                  42,965                  18,506
Foreign Bond Fund                                      164,040                  58,084                   1,129
Emerging Markets Bond Fund                               2,953                     928                       0
Municipal Bond                                          10,000                       0                       0
StocksPLUS Fund                                      1,679,748                 447,197                   8,113
</TABLE>

  During the fiscal year ended March 31, 1999, the amounts collected pursuant to
the Distribution and Servicing Plan for Class B shares were used as follows:
sales commissions and other compensation to sales personnel, $6,535,984;
preparing, printing and distributing sales material and advertising (including
preparing, printing and distributing prospectuses to non-shareholders), and
other expenses (including data processing, legal and operations), $1,633,994.
These totals, if allocated among (i) compensation and (ii) sales materials and
other expenses for each Fund, were as follows:

                                       56
<PAGE>

<TABLE>
<CAPTION>


                                                                         Sales Material
                                                                            and Other
Fund                                                Compensation            Expenses               Total
- ----                                            --------------------   -------------------   ------------------
<S>                                             <C>                    <C>                   <C>
Money Market Fund                                         $   77,056              $ 19,264           $   96,320
Short-Term Fund                                               19,361                 4,840               24,201
Low Duration Fund                                            333,694                83,423              417,117
Real Return Bond Fund                                         18,677                 4,669               23,346
Total Return Fund                                          2,816,842               704,210            3,521,052
High Yield Fund                                            1,465,286               366,321            1,831,607
Long-Term U.S. Government Fund                               193,955                48,489              242,444
Global Bond Fund II                                           24,775                 6,194               30,969
Foreign Bond Fund                                            108,858                27,214              136,072
Emerging Markets Bond Fund                                     2,036                   509                2,545
Municipal Bond Fund                                           31,208                 7,802               39,010
StocksPLUS Fund                                            1,444,236               361,059            1,805,295
</TABLE>

Payments Pursuant to Class C Plan

  For the fiscal years ended March 31, 1999, March 31, 1998 and March 31, 1997,
the Trust paid the Distributor an aggregate of $11,016,443, $7,026,337 and
$1,219,775, respectively, pursuant to the Distribution and Servicing Plan for
Class C shares, of which the indicated amounts were attributable to the
following Funds:

<TABLE>
<S>                                      <C>                     <C>                     <C>
Fund                                               Year Ended              Year Ended              Year Ended
- ----                                                   3/31/99                 3/31/98                 3/31/97
                                                    ----------              ----------                --------
Money Market Fund                                   $   75,541              $   59,070                $ 12,352
Short-Term Fund                                         61,224                  22,612                     462
Low Duration Fund                                      645,396                 461,997                  92,491
Real Return Fund                                        16,396                   4,292                      79
Total Return Fund                                    5,309,578               3,510,589                 666,085
High Yield Fund                                      3,098,891               2,415,721                 412,589
Long-Term U.S. Government Fund                         200,406                  26,880                     163
Global Bond Fund II                                     49,000                  56,574                  23,021
Foreign Bond Fund                                      237,914                  91,131                   1,520
Emerging Markets Bond Fund                               1,972                     635                       0
Municipal Bond                                          10,000                       0                       0
StocksPLUS Fund                                      1,097,998                 376,836                  11,013
</TABLE>

     During the fiscal year ended March 31, 1999, the amounts collected pursuant
to the Distribution and Servicing Plan for Class C shares were used as follows:
sales commissions and other compensation to sales personnel, $8,813,154;
preparing, printing and distributing sales material and advertising (including
preparing, printing and distributing prospectuses to non-shareholders), and
other expenses (including data processing, legal and operations), $2,203,289.

                                       57
<PAGE>

These totals, if allocated among (i) compensation and (ii) sales materials and
other expenses for each Fund, were as follows:

<TABLE>
<CAPTION>
                                                                         Sales Material
                                                                            and Other
Fund                                                Compensation            Expenses               Total
- ----                                            --------------------   -------------------   ------------------
<S>                                             <C>                    <C>                   <C>
Money Market Fund                                         $  405,879              $101,470           $  507,349
Short-Term Fund                                               83,744                20,936              104,680
Low Duration Fund                                            600,960               150,240              751,200
Real Return Bond Fund                                         13,618                 3,405               17,023
Total Return Fund                                          3,838,393               959,598            4,797,991
High Yield Fund                                            1,989,895               497,474            2,487,369
Long-Term U.S. Government Fund                               170,669                42,667              213,336
Global Bond Fund II                                           31,495                 7,874               39,369
Foreign Bond Fund                                            159,037                39,759              198,796
Emerging Markets Bond Fund                                     1,225                   306                1,531
Municipal Bond Fund                                          203,876                50,969              254,845
StocksPLUS Fund                                            1,314,363               328,591            1,642,954
</TABLE>

          From time to time, expenses of principal underwriters incurred in
connection with the distribution of Class B and Class C shares of the Funds, and
in connection with the servicing of Class A, Class B and Class C shareholders of
the Funds and the maintenance of Class A, Class B and Class C shareholder
accounts, may exceed the distribution and/or servicing fees collected by the
Distributor. Class A, Class B and Class C Distribution and Servicing Plans,
which are similar to the Trust's current Plans, were in effect prior to January
17, 1997 in respect of the series of PAF that was the predecessor of the Global
Bond Fund II.  As of March 31, 1999, such expenses were approximately
$11,665,000 in excess of payments under the Class A Plan, $48,493,002 in excess
of payments under the Class B Plan and $1,770,000 in excess of payments under
the Class C Plan.

          The allocation of such excess (on a pro rata basis) among the Funds
listed below as of March 31, 1999 was as follows:

<TABLE>
<CAPTION>
Fund                                                   Class A                Class B               Class C
- ----                                            ---------------------   --------------------   -----------------
<S>                                             <C>                     <C>                    <C>
Money Market Fund                                          $  479,195            $   571,708            $ 81,515
Short-Term Fund                                               503,199                143,645              16,819
Low Duration Fund                                           1,184,278              2,475,803             120,694
Real Return Bond Fund                                          38,917                138,573               2,735
Total Return Fund                                           7,146,889             20,899,248             770,888
High Yield Fund                                               960,482             10,871,531             399,643
Long-Term U.S. Government Fund                                183,638              1,439,028              34,277
Global Bond Fund II                                            17,024                183,814               6,325
Foreign Bond Fund                                             180,855                807,658              31,940
Emerging Markets Bond Fund                                      1,066                 15,105                 246
Municipal Bond Fund                                            43,835                231,541              40,946
StocksPLUS Fund                                               925,622             10,715,348             263,972
</TABLE>

                                       58
<PAGE>

     The allocation of such excess (on a pro rata basis) among the Funds,
calculated as a percentage of net assets of each Fund listed below as of March
31, 1999 was as follows:


<TABLE>
<CAPTION>
Fund                                                    Class A               Class B               Class C
- ----                                                    -------              --------               --------
<S>                                               <C>                   <C>                   <C>
Money Market Fund                                         0.63%                 3.81%                 0.11%
Short-Term Fund                                           0.63                  3.81                  0.11
Low Duration Fund                                         0.63                  3.81                  0.11
Total Return Fund                                         0.63                  3.81                  0.11
Real Return Fund                                          0.63                  3.81                  0.11
High Yield Fund                                           0.63                  3.81                  0.11
Long-Term U.S. Government Fund                            0.63                  3.81                  0.11
Global Bond Fund II                                       0.63                  3.81                  0.11
Foreign Bond Fund                                         0.63                  3.81                  0.11
Emerging Markets Bond Fund                                0.63                  3.81                  0.11
Municipal Bond Fund                                       0.63                  3.81                  0.11
StocksPLUS Fund                                           0.63                  3.81                  0.11
</TABLE>

Distribution and Administrative Services Plans for Administrative Class Shares

     The Trust has adopted an Administrative Services Plan and an Administrative
Distribution Plan (together, the "Administrative Plans") with respect to the
Administrative Class shares of each Fund.

     Under the terms of the Administrative Distribution Plan, the Trust is
permitted to reimburse, out of the assets attributable to the Administrative
Class shares of each Fund, in an amount up to 0.25% on an annual basis of the
average daily net assets of that class, financial intermediaries for costs and
expenses incurred in connection with the distribution and marketing of
Administrative Class shares and/or the provision of certain shareholder services
to its customers that invest in Administrative Class shares of the Funds.  Such
services may include, but are not limited to, the following: providing
facilities to answer questions from prospective investors about a Fund;
receiving and answering correspondence, including requests for prospectuses and
statements of additional information; preparing, printing and delivering
prospectuses and shareholder reports to prospective shareholders; complying with
federal and state securities laws pertaining to the sale of Administrative Class
shares; and assisting investors in completing application forms and selecting
dividend and other account options.

     Under the terms of the Administrative Services Plan, the Trust is permitted
to reimburse, out of the assets attributable to the Administrative Class shares
of each Fund, in an amount up to 0.25% on an annual basis of the average daily
net assets of that class, financial intermediaries that provide certain
administrative services for Administrative Class shareholders.  Such services
may include, but are not limited to, the following functions:  receiving,
aggregating and processing shareholder orders; furnishing shareholder sub-
accounting; providing and maintaining elective shareholder services such as
check writing and wire transfer services; providing and maintaining pre-
authorized investment plans; communicating periodically with shareholders;
acting as the sole shareholder of record and nominee for shareholders;
maintaining accounting records for shareholders; answering questions and
handling correspondence from shareholders about their accounts; and performing
similar account administrative services.

     The same entity may be the recipient of fees under both the Administrative
Class Distribution Plan and the Administrative Services Plan, but may not
receive fees under both plans with respect to the same assets.  Fees paid
pursuant to either Plan may be paid for shareholder services and the maintenance
of shareholder accounts, and therefore may constitute "service fees" for
purposes of applicable rules of the National Association of Securities Dealers,
Inc.  Each Plan has been adopted in accordance with the requirements of Rule
12b-1 under the 1940 Act and will be administered in accordance with the

                                       59
<PAGE>

provisions of that rule, except that shareholders will not have the voting
rights set forth in Rule 12b-1 with respect to the Administrative Services Plan
that they will have with respect to the Administrative Distribution Plan.

     Each Administrative Plan provides that it may not be amended to materially
increase the costs which Administrative Class shareholders may bear under the
Plan without the approval of a majority of the outstanding voting securities of
the Administrative Class, and by vote of a majority of both (i) the Trustees of
the Trust and (ii) those Trustees who are not "interested persons" of the Trust
(as defined in the 1940 Act) and who have no direct or indirect financial
interest in the operation of the Plan or any agreements related to it (the "Plan
Trustees"), cast in person at a meeting called for the purpose of voting on the
Plan and any related amendments.

     Each Administrative Plan provides that it may not take effect until
approved by vote of a majority of both (i) the Trustees of the Trust and (ii)
the disinterested Trustees defined above.  The Administrative Class Distribution
Plan further provides that it may not take effect unless approved by the vote of
a majority of the outstanding voting securities of the Administrative Class.

     Each Administrative Plan provides that it shall continue in effect so long
as such continuance is specifically approved at least annually by the Trustees
and the disinterested Trustees defined above.  Each Administrative Plan provides
that any person authorized to direct the disposition of monies paid or payable
by a class pursuant to the Plan or any related agreement shall provide to the
Trustees, and the Board shall review at least quarterly, a written report of the
amounts so expended and the purposes for which such expenditures were made.

     Each Administrative Plan is a "reimbursement plan," which means that fees
are payable to the relevant financial intermediary only to the extent necessary
to reimburse expenses incurred pursuant to such plan.  Each Administrative Plan
provides that expenses payable under the Plan may be carried forward for
reimbursement for up to twelve months beyond the date in which the expense is
incurred, subject to the limit that not more that 0.25% of the average daily net
assets of Administrative Class shares may be used in any month to pay expenses
under the Plan.  Each Plan requires that Administrative Class shares incur no
interest or carrying charges.

     Rules of the NASD limit the amount of distribution fees that may be paid by
mutual funds.  "Service fees," defined to mean fees paid for providing
shareholder services or the maintenance of accounts (but not transfer agency
services) are not subject to the limits.  The Trust believes that some, if not
all, of the fees paid pursuant to both Administrative Plans will qualify as
"service fees" and therefore will not be limited by NASD rules.

     Institutional and Administrative Class shares of the Trust may also be
offered through certain brokers and financial intermediaries ("service agents")
that have established a shareholder servicing relationship with the Trust on
behalf of their customers.  The Trust pays no compensation to such entities
other than service fees paid with respect to Administrative Class shares.
Service agents may impose additional or different conditions than the Trust on
the purchase, redemption or exchanges of Trust shares by their customers.
Service agents may also independently establish and charge their customers
transaction fees, account fees and other amounts in connection which purchases,
sales and redemption of Trust shares in addition to any fees charged by the
Trust.  Each service agent is responsible for transmitting to its customers a
schedule of any such fees and information regarding any additional or different
conditions regarding purchases and redemptions.  Shareholders who are customers
of service agents should consult their service agents for information regarding
these fees and conditions.

Payments Pursuant to the Administrative Plans

     For the fiscal years ended March 31, 1999, March 31, 1998 and March 31,
1997 the Trust paid qualified service providers an aggregate amount of
$3,691,083, $850,407 and $301,019, respectively,

                                       60
<PAGE>

pursuant to the Administrative Services Plan and the Administrative Distribution
Plan. Such payments were allocated among the Funds listed below as follows:


<TABLE>
<CAPTION>
                                                  Year Ended              Year Ended              Year Ended
Fund                                                  3/31/99                 3/31/98                 3/31/97
- --------                                            ----------                --------                --------
<S>                                      <C>                     <C>                     <C>
Money Market Fund                                   $   10,213                $    716                $      0
Short-Term Fund                                         16,719                  10,315                   4,289
Low Duration Fund                                      297,918                  72,650                  33,143
Low Duration Fund II                                    28,257                      19                       0
Total Return Fund                                    2,826,235                 691,950                 229,400
Total Return Fund II                                   135,827                       0                   8,414
Total Return Fund III                                    3,586                       0                     140
High Yield Fund                                        336,744                  60,079                  17,859
Long-Term U.S. Government Fund                          15,870                   5,340                      72
Municipal Bond                                             447                       0                       0
Global Bond Fund                                         2,995                   8,806                   6,336
Foreign Bond Fund                                        3,134                     532                     185
Emerging Markets Bond Fund                                 135                       0                       0
StocksPLUS Fund                                         13,003                       0                   1,181
</TABLE>

  The remaining Funds did not make payments under either Administrative Plan.

Plan for Class D Shares

     As described under "Management of the Trust- Fund Administrator," the
Funds' Administration Agreement includes a plan (the "Class D Plan") adopted
pursuant to Rule 12b-1 under the 1940 Act which provides for the payment of up
to .25% of the Class D administrative fees as reimbursement for expenses in
respect of activities that may be deemed to be primarily intended to result in
the sale of Class D shares.

     Specifically, the Administration Agreement provides that the Administrator
shall provide in respect of Class D shares (either directly or by procuring
through other entities, including various financial services firms such as
broker-dealers and registered investment advisors ("Service Organizations"))
some or all of the following services and facilities in connection with direct
purchases by shareholders or in connection with products, programs or accounts
offered by such Service Organizations ("Special Class D Services"): (i)
facilities for placing orders directly for the purchase of a Fund's shares and
tendering a Fund's Class D shares for redemption; (ii) advertising with respect
to a Fund's Class D shares; (iii) providing information about the Funds; (iv)
providing facilities to answer questions from prospective investors about the
Funds; (v) receiving and answering correspondence, including requests for
prospectuses and statements of additional information; (vi) preparing, printing
and delivering prospectuses and shareholder reports to prospective shareholders;
(vii) assisting investors in applying to purchase Class D shares and selecting
dividend and other account options; and (viii) shareholder services provided by
a Service Organization that may include, but are not limited to, the following
functions: receiving, aggregating and processing shareholder orders; furnishing
shareholder sub-accounting; providing and maintaining elective shareholder
services such as check writing and wire transfer services; providing and
maintaining pre-authorized investment plans; communicating periodically with
shareholders; acting as the sole shareholder of record and nominee for
shareholders; maintaining accounting records for shareholders; answering
questions and handling correspondence from shareholders about their accounts;
issuing confirmations for transactions by shareholders; performing similar
account administrative services; providing such shareholder communications and
recordkeeping services as may be required for any program for which the Service
Organization is a sponsor that relies on Rule 3a-4 under the 1940 Act; and
providing such other similar services as may reasonably be requested to the
extent the Service Organization is permitted to do so under applicable statutes,
rules, or regulations.

                                       61
<PAGE>

     The Administrator has entered into an agreement with the Distributor under
which the distributor is compensated for providing or procuring certain of the
Class D Services at the rate of .25% per annum of all assets attributable to
Class D shares sold through the Distributor.

     The Trust and the Administrator understand that some or all of the Special
Class D Services pursuant to the Administration Agreement may be deemed to
represent services primarily intended to result in the sale of Class D shares.
The Administration Agreement includes the Class D Plan to account for this
possibility.  The Administration Agreement provides that any portion of the fees
paid thereunder in respect of Class D shares representing reimbursement for the
Administrator's and the Distributor's expenditures and internally allocated
expenses in respect of Class D Services of any Fund shall not exceed the rate of
 .25% per annum of the average daily net assets of such Fund attributable to
Class D shares.

     In accordance with Rule 12b-1 under the 1940 Act, the Class D Plan may not
be amended to increase materially the costs which Class D shareholders may bear
under the Plan without approval of a majority of the outstanding Class D shares,
and by vote of a majority of both (i) the Trustees of the Trust and (ii) those
Trustees ("disinterested Class D Plan Trustees") who are not "interested
persons" of the Trust (as defined in the 1940 Act) and who have no direct or
indirect financial interest in the operation of the Plan or any agreements
related to it, cast in person at a meeting called for the purpose of voting on
the Plan and any related amendments.  The Class D Plan may not take effect until
approved by a vote of a majority of both (i) the Trustees of the Trust and (ii)
the disinterested Class D Plan Trustees.  In addition, the Class D Plan may not
take effect unless it is approved by the vote of a majority of the outstanding
Class D shares and it shall continue in effect so long as such continuance is
specifically approved at least annually by the Trustees and the disinterested
Class D Plan Trustees.

     With respect to the Class D Plan, the Administration Agreement requires the
Administrator to present reports as to out-of-pocket expenditures and internal
expenses allocations of the Administrator and the Distributor at least quarterly
and in a manner that permits the disinterested Class D Plan Trustees to
determine that portion of the Class D administrative fees paid thereunder which
represents reimbursements in respect of Special Class D Services.

     Rules of the NASD limit the amount of distribution fees that may be paid by
mutual funds.  "Service fees," defined to mean fees paid for providing
shareholder services or the maintenance of accounts (but not transfer agency
services) are not subject to the limits.  The Trust believes that most, if not
all, of the fees paid pursuant to the Class D Plan will qualify as "service
fees" and therefore will not be limited by NASD rules.

                                       62
<PAGE>

Payments Pursuant to Class D Plan

  For the fiscal year ended March 31, 1999, the Trust paid $48,375 pursuant to
the Class D Plan, of which the indicated amounts were attributable to the
following operational Funds:

<TABLE>
<CAPTION>
Fund                                                 Year Ended
- ----                                                   3/31/99
                                                      --------
<S>                                               <C>
Short-Term Fund                                       $  1,589
Low Duration Fund                                        5,733
Real Return Fund                                           323
Total Return Fund                                       23,268
Total Return Mortgage Fund                                 283
High Yield Fund                                          5,873
Foreign Bond Fund                                        8,973
Municipal Bond                                             402
Strategic Balanced                                         291
StocksPLUS Fund                                          1,640
</TABLE>

Distribution and Servicing Plan for Class J and Class K Shares


     Class J and Class K each has a separate distribution and servicing plan
(the "Class J-K Plans").  Distribution fees paid pursuant to the Class J-K Plans
may only be paid in connection with services provided with respect to Class J
and Class K shares.

     As stated in the Prospectus relating to Class J and Class K shares under
the caption "Service and Distribution Fees," the Distributor pays (i) all or a
portion of the distribution fees it receives from the Trust to participating and
introducing brokers, and (ii) all or a portion of the servicing fees it receives
from the Trust to participating and introducing brokers, certain banks and other
financial intermediaries.

  Each Class J-K Plan may be terminated with respect to any Fund to which the
Class J-K Plan relates by vote of a majority of the Trustees who are not
interested persons of the Trust (as defined in the 1940 Act) and who have no
direct or indirect financial interest in the operation of the Plan or the
Distribution Contract ("Disinterested Trustees") or by vote of a majority of the
outstanding voting securities of the relevant class of that Fund. Pursuant to
Rule 12b-1, any change in either Class J-K Plan that would materially increase
the cost to the class of shares of any Fund to which the Plan relates requires
approval by the affected class of shareholders of that Fund. The Trustees review
quarterly written reports of such costs and the purposes for which such costs
have been incurred.  Each Class J-K Plan may be amended by vote of the
Disinterested Trustees cast in person at a meeting called for the purpose. As
long as the Class J-K Plans are in effect, selection and nomination of those
Trustees who are not interested persons of the Trust shall be committed to the
discretion of such Disinterested Trustees.

  The Class J-K Plans will continue in effect with respect to each Fund and each
class of shares thereof for successive one-year periods, provided that each such
continuance is specifically approved (i) by the vote of a majority of the
Disinterested Trustees and (ii) by the vote of a majority of the entire Board of
Trustees cast in person at a meeting called for that purpose.

  If a Class J-K Plan is terminated (or not renewed) with respect to one or more
Funds, it may continue in effect with respect to any class of any Fund as to
which it has not been terminated (or has been renewed).

     The Trustees believe that the Class J-K Plans will provide benefits to the
Trust. The Trustees believe that the Class J-K Plans will result in greater
sales and/or fewer redemptions of Trust shares, although it is impossible to
know for certain the level of sales and redemptions of Trust shares that would

                                       63
<PAGE>

occur in the absence of the Class J-K Plans or under alternative distribution
schemes. Although the Funds' expenses are essentially fixed, the Trustees
believe that the effect of the Class J-K Plans on sales and/or redemptions may
benefit the Trust by reducing Fund expense ratios and/or by affording greater
flexibility to Portfolio Managers.  From time to time, expenses of the
Distributor incurred in connection with the sale of Class J and Class K shares
of the Funds, and in connection with the servicing of Class J and Class K
shareholders of the Funds and the maintenance of shareholder accounts, may
exceed the distribution and servicing fees collected by the Distributor.  The
Trustees consider such unreimbursed amounts, among other factors, in determining
whether to cause the Funds to continue payments of distribution and servicing
fees in the future with respect to Class J and Class K shares.

Purchases, Exchanges and Redemptions

     Purchases, exchanges and redemptions of Class A, Class B, Class C and Class
D shares are discussed in the Class A, B and C and Class D Prospectuses under
the headings "How to Buy Shares," "Exchange Privilege," and "How to Redeem," and
that information is incorporated herein by reference.  Purchases, exchanges and
redemptions of Institutional and Administrative Class shares and Class J and
Class K shares are discussed in the Institutional Prospectus under the headings
"Purchase of Shares," "Redemption of Shares," and "Net Asset Value," and in the
Class J and Class K supplement thereto, and that information is incorporated
herein by reference.

     Certain managed account clients of PIMCO may purchase shares of the Trust.
To avoid the imposition of duplicative fees, PIMCO may be required to make
adjustments in the management fees charged separately by PIMCO to these clients
to offset the generally higher level of management fees and expenses resulting
from a client's investment in the Trust.

     Certain clients of PIMCO whose assets would be eligible for purchase by one
or more of the Funds may purchase shares of the Trust with such assets.  Assets
so purchased by a Fund will be valued in accordance with procedures adopted by
the Board of Trustees.

     Certain shares of the Funds are not qualified or registered for sale in all
states and Class J and Class K shares are not qualified or registered for sale
in the United States.  Prospective investors should inquire as to whether shares
of a particular Fund or class are available for offer and sale in their state of
domicile or residence.  Shares of a Fund may not be offered or sold in any state
unless registered or qualified in that jurisdiction, unless an exemption from
registration or qualification is available.

     Independent financial intermediaries unaffiliated with PIMCO may perform
shareholder servicing functions with respect to certain of their clients whose
assets may be invested in the Funds. These services, normally provided by PIMCO
directly to Trust shareholders, may include the provision of ongoing information
concerning the Funds and their investment performance, responding to shareholder
inquiries, assisting with purchases, redemptions and exchanges of Trust shares,
and other services. PIMCO may pay fees to such entities for the provision of
these services which PIMCO normally would perform, out of PIMCO's own resources.

     As described in the Class A, B and C and Class D Prospectuses under the
caption "Exchanging Shares," and in the Institutional Prospectus under the
caption "Exchange Privilege," a shareholder may exchange shares of any Fund for
shares of any other Fund of the Trust or any  series of PIMCO Funds:  Multi-
Manager Series, within the same class on the basis of their respective net asset
values. The original purchase date(s) of shares exchanged for purposes of
calculating any contingent deferred sales charge will carry over to the
investment in the new Fund. For example, if a shareholder invests in the Class C
shares of one Fund and 6 months later (when the contingent deferred sales charge
upon redemption would normally be 1%) exchanges his shares for Class C shares of
another Fund, no sales charge would be imposed upon the exchange but the
investment in the other Fund would be subject to the 1% contingent deferred
sales charge until one year after the date of the shareholder's investment in
the first Fund as described in the Class A, B and C Prospectus under
"Alternative Purchase Arrangements." With respect

                                       64
<PAGE>

to Class B or Class C shares, or Class A shares subject to a contingent deferred
sales charge, if less than all of an investment is exchanged out of a Fund, any
portion of the investment attributable to capital appreciation and/or reinvested
dividends or capital gains distributions will be exchanged first, and thereafter
any portions exchanged will be from the earliest investment made in the Fund
from which the exchange was made.

     Orders for exchanges accepted prior to the close of regular trading on the
New York Stock Exchange on any day the Trust is open for business will be
executed at the respective net asset values determined as of the close of
business that day. Orders for exchanges received after the close of regular
trading on the Exchange on any business day will be executed at the respective
net asset values determined at the close of the next business day.

     An excessive number of exchanges may be disadvantageous to the Trust.
Therefore, the Trust, in addition to its right to reject any exchange, reserves
the right to adopt a policy of terminating the exchange privilege of any
shareholder who makes more than a specified number of exchanges in a 12-month
period or in any calendar quarter.  The Trust reserves the right to modify or
discontinue the exchange privilege at any time.

     The Trust reserves the right to suspend or postpone redemptions during any
period when: (a) trading on the New York Stock Exchange is restricted, as
determined by the SEC, or that Exchange is closed for other than customary
weekend and holiday closings; (b) the SEC has by order permitted such
suspension; or (c) an emergency, as determined by the SEC, exists, making
disposal of portfolio securities or valuation of net assets of the Fund not
reasonably practicable.

     The Trust is committed to paying in cash all requests for redemptions by
any shareholder of record of the Funds, limited in amount with respect to each
shareholder during any 90-day period to the lesser of (i) $250,000, or (ii) 1%
of the net asset value of the Trust at the beginning of such period. Although
the Trust will normally redeem all shares for cash, it may, in unusual
circumstances, redeem amounts in excess of the lesser of (i) or (ii) above by
payment in kind of securities held in the Funds' portfolios.

     The Trust has adopted procedures under which it may make redemptions-in-
kind to shareholders who are affiliated persons of a Fund.  Under these
procedures, the Trust generally may  satisfy a redemption request from an
affiliated person in-kind, provided that: (1) the redemption-in-kind is effected
at approximately the affiliated shareholder's proportionate share of the
distributing Fund's current net assets, and thus does not result in the dilution
of the interests of the remaining shareholders; (2) the distributed securities
are valued in the same manner as they are valued for purposes of computing the
distributing Fund's net asset value; (3) the redemption-in-kind is consistent
with the Fund's prospectus and statement of additional information; and (4)
neither the affiliated shareholder nor any other party with the ability and the
pecuniary incentive to influence the redemption-in-kind selects, or influences
the selection of, the distributed securities.

     Due to the relatively high cost of maintaining smaller accounts, the Trust
reserves the right to redeem shares in any account for their then-current value
(which will be promptly paid to the investor) if at any time, due to shareholder
redemption, the shares in the account do not have a value of at least a
specified amount, the minimums of which are currently set at $250 for Class A,
Class B and Class C shares, $2,000 for Class D shares, and $100,000 for
Institutional Class and Administrative Class shares ($10,000 with respect to
Institutional Class and Administrative Class accounts opened before January 1,
1995).  The Prospectuses may set higher minimum account balances for one or more
classes from time to time depending upon the Trust's current policy.  An
investor will be notified that the value of his account is less than the minimum
and allowed at least 30 days to bring the value of the account up to at least
the specified amount before the redemption is processed.  The Declaration of
Trust also authorizes the Trust to redeem shares under certain other
circumstances as may be specified by the Board of Trustees.  The

                                       65
<PAGE>

Trust may also charge periodic account fees for accounts that fall below minimum
balances, as described in the Prospectuses.

                      PORTFOLIO TRANSACTIONS AND BROKERAGE

Investment Decisions and Portfolio Transactions

     Investment decisions for the Trust and for the other investment advisory
clients of PIMCO are made with a view to achieving their respective investment
objectives.  Investment decisions are the product of many factors in addition to
basic suitability for the particular client involved (including the Trust).
Some securities considered for investments by the Funds may also be appropriate
for other clients served by PIMCO.  Thus, a particular security may be bought or
sold for certain clients even though it could have been bought or sold for other
clients at the same time.  If a purchase or sale of securities consistent with
the investment policies of a Fund and one or more of these clients served by
PIMCO is considered at or about the same time, transactions in such securities
will be allocated among the Fund and clients in a manner deemed fair and
reasonable by PIMCO. PIMCO may aggregate orders for the Funds with simultaneous
transactions entered into on behalf of other clients of PIMCO so long as price
and transaction expenses are averaged either for that transaction or for the
day.  Likewise, a particular security may be bought for one or more clients when
one or more clients are selling the security.  In some instances, one client may
sell a particular security to another client.  It also sometimes happens that
two or more clients simultaneously purchase or sell the same security, in which
event each day's transactions in such security are, insofar as possible,
averaged as to price and allocated between such clients in a manner which in
PIMCO's opinion is equitable to each and in accordance with the amount being
purchased or sold by each.  There may be circumstances when purchases or sales
of portfolio securities for one or more clients will have an adverse effect on
other clients.

Brokerage and Research Services

     There is generally no stated commission in the case of fixed income
securities, which are traded in the over-the-counter markets, but the price paid
by the Trust usually includes an undisclosed dealer commission or mark-up.  In
underwritten offerings, the price paid by the Trust includes a disclosed, fixed
commission or discount retained by the underwriter or dealer.  Transactions on
U.S. stock exchanges and other agency transactions involve the payment by the
Trust of negotiated brokerage commissions.  Such commissions vary among
different brokers.  Also, a particular broker may charge different commissions
according to such factors as the difficulty and size of the transaction.
Transactions in foreign securities generally involve the payment of fixed
brokerage commissions, which are generally higher than those in the United
States.

     PIMCO places all orders for the purchase and sale of portfolio securities,
options and futures contracts for the relevant Fund and buys and sells such
securities, options and futures for the Trust through a substantial number of
brokers and dealers.  In so doing, PIMCO uses its best efforts to obtain for the
Trust the most favorable price and execution available, except to the extent it
may be permitted to pay higher brokerage commissions as described below.  In
seeking the most favorable price and execution, PIMCO, having in mind the
Trust's best interests, considers all factors it deems relevant, including, by
way of illustration, price, the size of the transaction, the nature of the
market for the security, the amount of the commission, the timing of the
transaction taking into account market prices and trends, the reputation,
experience and financial stability of the broker-dealer involved and the quality
of service rendered by the broker-dealer in other transactions.

     PIMCO places orders for the purchase and sale of portfolio investments for
the Funds' accounts with brokers or dealers selected by it in its discretion. In
effecting purchases and sales of portfolio securities for the account of the
Funds, PIMCO will seek the best price and execution of the Funds' orders. In
doing so, a Fund may pay higher commission rates than the lowest available when
PIMCO believes it is reasonable to do so in light of the value of the brokerage
and research services provided by

                                       66
<PAGE>

the broker effecting the transaction, as discussed below. PIMCO also may
consider sales of shares of the Trust as a factor in the selection of broker-
dealers to execute portfolio transactions for the Trust.

     It has for many years been a common practice in the investment advisory
business for advisers of investment companies and other institutional investors
to receive research services from broker-dealers which execute portfolio
transactions for the clients of such advisers.  Consistent with this practice,
PIMCO receives research services from many broker-dealers with which PIMCO
places the Trust's portfolio transactions.  PIMCO may also receive research or
research credits from brokers which are generated from underwriting commissions
when purchasing new issues of fixed income securities or other assets for a
Fund.  These services, which in some cases may also be purchased for cash,
include such matters as general economic and security market reviews, industry
and company reviews, evaluations of securities and recommendations as to the
purchase and sale of securities.  Some of these services are of value to PIMCO
in advising various of its clients (including the Trust), although not all of
these services are necessarily useful and of value in managing the Trust.  The
management fee paid by the Trust is not reduced because PIMCO and its affiliates
receive such services.

     As permitted by Section 28(e) of the Securities Exchange Act of 1934, PIMCO
may cause the Trust to pay a broker-dealer which provides "brokerage and
research services" (as defined in the Act) to PIMCO an amount of disclosed
commission for effecting a securities transaction for the Trust in excess of the
commission which another broker-dealer would have charged for effecting that
transaction.

     Consistent with the Rules of the NASD and subject to seeking the most
favorable price and execution available and such other policies as the Trustees
may determine, PIMCO may also consider sales of shares of the Trust as a factor
in the selection of broker-dealers to execute portfolio transactions for the
Trust.

Portfolio Turnover

     A change in the securities held by a Fund is known as "portfolio turnover."
PIMCO manages the Funds without regard generally to restrictions on portfolio
turnover, except those imposed on their ability to engage in short-term trading
by provisions of the federal tax laws, see "Taxation."  The use of certain
derivative instruments with relatively short maturities may tend to exaggerate
the portfolio turnover rate for some of the Funds.  Trading in fixed income
securities does not generally involve the payment of brokerage commissions, but
does involve indirect transaction costs.  The use of futures contracts may
involve the payment of commissions to futures commission merchants.  High
portfolio turnover (e.g., greater than 100%) involves correspondingly greater
expenses to a Fund, including brokerage commissions or dealer mark-ups and other
transaction costs on the sale of securities and reinvestments in other
securities. The higher the rate of portfolio turnover of a Fund, the higher
these transaction costs borne by the Fund generally will be.  Such sales may
result in realization of taxable capital gains (including short-term capital
gains which are generally taxed to shareholders at ordinary income tax rates).

     The portfolio turnover rate of a Fund is calculated by dividing (a) the
lesser of purchases or sales of portfolio securities for the particular fiscal
year by (b) the monthly average of the value of the portfolio securities owned
by the Fund during the particular fiscal year.  In calculating the rate of
portfolio turnover, there is excluded from both (a) and (b) all securities,
including options, whose maturities or expiration dates at the time of
acquisition were one year or less.  Proceeds from short sales and assets used to
cover short positions undertaken are included in the amounts of securities sold
and purchased, respectively, during the year.  Portfolio turnover rates for each
Fund for which financial highlights for at least the past two fiscal years are
provided in the Prospectuses are set forth under "Financial Highlights" in the
applicable Prospectus.

                                       67
<PAGE>

                                NET ASSET VALUE

     Net Asset Value is determined as indicated under "How Fund Shares are
Priced" in the Prospectuses.  Net asset value will not be determined on the
following holidays:  New Year's Day, Martin Luther King, Jr. Day, President's
Day, Good Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving Day,
and Christmas Day.

     For all Funds other than Money Market Fund, portfolio securities and other
assets for which market quotations are readily available are stated at market
value.  Market value is determined on the basis of last reported sales prices,
or if no sales are reported, as is the case for most securities traded over-the-
counter, at the mean between representative bid and asked quotations obtained
from a quotation reporting system or from established market makers. Fixed
income securities, including those to be purchased under firm commitment
agreements (other than obligations having a maturity of 60 days or less), are
normally valued on the basis of quotations obtained from brokers and dealers or
pricing services, which take into account appropriate factors such as
institutional-sized trading in similar groups of securities, yield, quality,
coupon rate, maturity, type of issue, trading characteristics, and other market
data.

     The Money Market Fund's securities are valued using the amortized cost
method of valuation.  This involves valuing a security at cost on the date of
acquisition and thereafter assuming a constant accretion of a discount or
amortization of a premium to maturity, regardless of the impact of fluctuating
interest rates on the market value of the instrument.  While this method
provides certainty in valuation, it may result in periods during which value, as
determined by amortized cost, is higher or lower than the price the Fund would
receive if it sold the instrument.  During such periods the yield to investors
in the Fund may differ somewhat from that obtained in a similar investment
company which uses available market quotations to value all of its portfolio
securities.

     The SEC's regulations require the Money Market Fund to adhere to certain
conditions. The Trustees, as part of their responsibility within the overall
duty of care owed to the shareholders, are required to establish procedures
reasonably designed, taking into account current market conditions and the
Fund's investment objective, to stabilize the net asset value per share as
computed for the purpose of distribution and redemption at $1.00 per share.  The
Trustees' procedures include a requirement to periodically monitor, as
appropriate and at such intervals as are reasonable in light of current market
conditions, the relationship between the amortized cost value per share and the
net asset value per share based upon available indications of market value.  The
Trustees will consider what steps should be taken, if any, in the event of a
difference of more than 1/2 of 1% between the two.  The Trustees will take such
steps as they consider appropriate, (e.g., selling securities to shorten the
average portfolio maturity) to minimize any material dilution or other unfair
results which might arise from differences between the two. The Fund also is
required to maintain a dollar-weighted average portfolio maturity of 90 days or
less, to limit its investments to instruments having remaining maturities of 397
days or less (except securities held subject to repurchase agreements having 397
days or less maturity) and to invest only in securities determined by PIMCO
under procedures established by the Board of Trustees to be of high quality with
minimal credit risks.

     Each Fund's liabilities are allocated among its classes. The total of such
liabilities allocated to a class plus that class's distribution and/or servicing
fees and any other expenses specially allocated to that class are then deducted
from the class's proportionate interest in the Fund's assets, and the resulting
amount for each class is divided by the number of shares of that class
outstanding to produce the class's "net asset value" per share. Under certain
circumstances, the per share net asset value of the Class B and Class C shares
of the Funds that do not declare regular income dividends on a daily basis may
be lower than the per share net asset value of the Class A shares as a result of
the daily expense accruals of the distribution fee applicable to the Class B and
Class C shares. Generally, for Funds that pay income dividends, those dividends
are expected to differ over time by approximately the amount of the expense
accrual differential between a particular Fund's classes.

                                       68
<PAGE>

                                    TAXATION

     The following summarizes certain additional federal income tax
considerations generally affecting the Funds and their shareholders.  The
discussion is for general information only and does not purport to consider all
aspects of U.S. federal income taxation that might be relevant to beneficial
owners of shares of the Funds.  The discussion is based upon current provisions
of the Internal Revenue Code of 1986, as amended (the "Code"), existing
regulations promulgated thereunder, and administrative and judicial
interpretations thereof, all of which are subject to change, which change could
be retroactive.  The discussion applies only to beneficial owners of Fund shares
in whose hands such shares are capital assets within the meaning of Section 1221
of the Code, and may not apply to certain types of beneficial owners of shares
(such as insurance companies, tax exempt organizations, and broker-dealers) who
may be subject to special rules.  Persons who may be subject to tax in more than
one country should consult the provisions of any applicable tax treaty to
determine the potential tax consequences to them.  Prospective investors should
consult their own tax advisers with regard to the federal tax consequences of
the purchase, ownership and disposition of Fund shares, as well as the tax
consequences arising under the laws of any state, foreign country, or other
taxing jurisdiction.  The discussion here and in the Prospectuses is not
intended as a substitute for careful tax planning.

     Each Fund intends to qualify annually and elect to be treated as a
regulated investment company under the Code.  To qualify as a regulated
investment company, each Fund generally must, among other things, (a) derive in
each taxable year at least 90% of its gross income from dividends, interest,
payments with respect to securities loans, and gains from the sale or other
disposition of stock, securities or foreign currencies, or other income derived
with respect to its business of investing in such stock, securities or
currencies ("Qualifying Income Test"); (b) diversify its holdings so that, at
the end of each quarter of the taxable year, (i) at least 50% of the market
value of the Fund's assets is represented by cash, U.S. Government securities,
the securities of other regulated investment companies and other securities,
with such other securities of any one issuer limited for the purposes of this
calculation to an amount not greater than 5% of the value of the Fund's total
assets and 10% of the outstanding voting securities of such issuer, and (ii) not
more than 25% of the value of its total assets is invested in the securities of
any one issuer (other than U.S. Government securities or the securities of other
regulated investment companies); and (c) distribute each taxable year the sum of
(i) at least 90% of its investment company taxable income (which includes
dividends, interest and net short-term capital gains in excess of any net long-
term capital losses) and (ii) 90% of its tax exempt interest, net of expenses
allocable thereto.  The Treasury Department is authorized to promulgate
regulations under which gains from foreign currencies (and options, futures, and
forward contracts on foreign currency) would constitute qualifying income for
purposes of the Qualifying Income Test only if such gains are directly related
to investing in securities.  To date, such regulations have not been issued.

     As a regulated investment company, a Fund generally will not be subject to
U.S. federal income tax on its investment company taxable income and net capital
gains (any net long-term capital gains in excess of the sum of net short-term
capital losses and capital loss carryovers from prior years) designated by the
Fund as capital gain dividends, if any, that it distributes to shareholders on a
timely basis.  Each Fund intends to distribute to its shareholders, at least
annually, all or substantially all of its investment company taxable income and
any net capital gains.  In addition, amounts not distributed by a Fund on a
timely basis in accordance with a calendar year distribution requirement are
subject to a nondeductible 4% excise tax. To avoid the tax, a Fund must
distribute during each calendar year an amount equal to the sum of (1) at least
98% of its ordinary income (not taking into account any capital gains or losses)
for the calendar year, (2) at least 98% of its capital gains in excess of its
capital losses (and adjusted for certain ordinary losses) for the twelve month
period ending on October 31, and (3) all ordinary income and capital gains for
previous years that were not distributed during such years.  A distribution will
be treated as paid on December 31 of the calendar year if it is declared by a
Fund in October, November, or December of that year to shareholders of record on
a date in such a month and paid by the Fund during January of the following
year.  Such distributions will be taxable to shareholders (other than those not

                                       69
<PAGE>

subject to federal income tax) in the calendar year in which the distributions
are declared, rather than the calendar year in which the distributions are
received.  To avoid application of the excise tax, each Fund intends to make its
distributions in accordance with the calendar year distribution requirement.

     Each Municipal Fund must have at least 50% of its total assets invested in
Municipal Bonds at the end of each calendar quarter so that dividends derived
from its net interest income on Municipal Bonds and so designated by the Fund
will be "exempt-interest dividends," which are generally exempt from federal
income tax when received by an investor.  Certain exempt-interest dividends, as
described in the Class A, B and C Prospectus, may increase alternative minimum
taxable income for purposes of determining a shareholder's liability for the
alternative minimum tax.  In addition, exempt-interest dividends allocable to
interest from certain "private activity bonds" will not be tax exempt for
purposes of the regular income tax to shareholders who are "substantial users"
of the facilities financed by such obligations or "related persons" of
"substantial users."  The tax-exempt portion of dividends paid for a calendar
year constituting "exempt-interest dividends" will be designated after the end
of that year and will be based upon the ratio of net tax-exempt income to total
net income earned by the Fund during the entire year.  That ratio may be
substantially different than the ratio of net tax-exempt income to total net
income earned during a portion of the year.  Thus, an investor who holds shares
for only a part of the year may be allocated more or less tax-exempt interest
dividends than would be the case if the allocation were based on the ratio of
net tax-exempt income to total net income actually earned by the Fund while the
investor was a shareholder.  All or a portion of interest on indebtedness
incurred or continued by a shareholder to purchase or carry shares of a
Municipal Fund will not be deductible by the shareholder.  The portion of
interest that is not deductible is equal to the total interest paid or accrued
on the indebtedness multiplied by the percentage of the Fund's total
distributions (not including distributions of the excess of net long-term
capital gains over net short-term capital losses) paid to the shareholder that
are exempt-interest dividends.  Under rules used by the Internal Revenue Service
for determining when borrowed funds are considered used for the purpose of
purchasing or carrying particular assets, the purchase of shares may be
considered to have been made with borrowed funds even though such funds are not
directly traceable to the purchase of shares.

     Shareholders of the Municipal Funds receiving social security or railroad
retirement benefits may be taxed on a portion of those benefits as a result of
receiving tax exempt income (including exempt-interest dividends distributed by
the Fund).  The tax may be imposed on up to 50% of a recipient's benefits in
cases where the sum of the recipient's adjusted gross income (with certain
adjustments, including tax-exempt interest) and 50% of the recipient's benefits,
exceeds a base amount.  In addition, up to 85% of a recipient's benefits may be
subject to tax if the sum of the recipient's adjusted gross income (with certain
adjustments, including tax-exempt interest) and 50% of the recipient's benefits
exceeds a higher base amount.  Shareholders receiving social security or
railroad retirement benefits should consult with their tax advisors.

     In years when a Fund distributes amounts in excess of its earnings and
profits, such distributions may be treated in part as a return of capital.  A
return of capital is not taxable to a shareholder and has the effect of reducing
the shareholder's basis in the shares.  Since certain of the Municipal Funds'
expenses attributable to earning tax-exempt income do not reduce such Fund's
current earnings and profits, it is possible that distributions, if any, in
excess of such Fund's net tax-exempt and taxable income will be treated as
taxable dividends to the extent of such Fund's remaining earnings and profits
(i.e., the amount of such expenses).

Distributions

     Except for exempt-interest dividends paid by the Municipal Funds, all
dividends and distributions of a Fund, whether received in shares or cash,
generally are taxable and must be reported on each shareholder's federal income
tax return. Dividends paid out of a Fund's investment company taxable income
will be taxable to a U.S. shareholder as ordinary income.  Distributions
received by tax-exempt

                                       70
<PAGE>

shareholders will not be subject to federal income tax to the extent permitted
under the applicable tax exemption.

     A portion of the dividends paid by the StocksPLUS Fund may qualify for the
deduction for dividends received by corporations. Dividends paid by the other
Funds generally are not expected to qualify for the deduction for dividends
received by corporations, although certain distributions from the High Yield
Fund may qualify. Distributions of net capital gains, if any, designated as
capital gain dividends, are taxable as long-term capital gains, regardless of
how long the shareholder has held a Fund's shares and are not eligible for the
dividends received deduction. Any distributions that are not from a Fund's
investment company taxable income or net realized capital gains may be
characterized as a return of capital to shareholders or, in some cases, as
capital gain.  The tax treatment of dividends and distributions will be the same
whether a shareholder reinvests them in additional shares or elects to receive
them in cash.

Sales of Shares

     Upon the disposition of shares of a Fund (whether by redemption, sale or
exchange), a shareholder will realize a gain or loss.  Such gain or loss will be
capital gain or loss if the shares are capital assets in the shareholder's
hands, and will be long-term or short-term generally depending upon the
shareholder's holding period for the shares.  Any loss realized on a disposition
will be disallowed to the extent the shares disposed of are replaced within a
period of 61 days beginning 30 days before and ending 30 days after the shares
are disposed of.  In such a case, the basis of the shares acquired will be
adjusted to reflect the disallowed loss. Any loss realized by a shareholder on a
disposition of shares held by the shareholder for six months or less will be
treated as a long-term capital loss to the extent of any distributions of
capital gain dividends received by the shareholder with respect to such shares.

Backup Withholding

     A Fund may be required to withhold 31% of all taxable distributions payable
to shareholders who fail to provide the Fund with their correct taxpayer
identification number or to make required certifications, or who have been
notified by the Internal Revenue Service that they are subject to backup
withholding. Corporate shareholders and certain other shareholders specified in
the Code generally are exempt from such backup withholding.  Backup withholding
is not an additional tax.  Any amounts withheld may be credited against the
shareholder's U.S. federal tax liability.

Options, Futures and Forward Contracts, and Swap Agreements

     Some of the options, futures contracts, forward contracts, and swap
agreements used by the Funds may be "section 1256 contracts."  Any gains or
losses on section 1256 contracts are generally considered 60% long-term and 40%
short-term capital gains or losses ("60/40") although certain foreign currency
gains and losses from such contracts may be treated as ordinary in character.
Also, section 1256 contracts held by a Fund at the end of each taxable year
(and, for purposes of the 4% excise tax, on certain other dates as prescribed
under the Code) are "marked to market" with the result that unrealized gains or
losses are treated as though they were realized and the resulting gain or loss
is treated as ordinary or 60/40 gain or loss.

     Generally, the hedging transactions and certain other transactions in
options, futures and forward contracts undertaken by a Fund, may result in
"straddles" for U.S. federal income tax purposes.  In some cases, the straddle
rules also could apply in connection with swap agreements.  The straddle rules
may affect the character of gains (or losses) realized by a Fund.  In addition,
losses realized by a Fund on positions that are part of a straddle may be
deferred under the straddle rules, rather than being taken into account in
calculating the taxable income for the taxable year in which such losses are
realized.  Because only a few regulations implementing the straddle rules have
been promulgated, the tax consequences of transactions in options, futures,
forward contracts, and swap agreements to a Fund are not entirely clear.

                                       71
<PAGE>

The transactions may increase the amount of short-term capital gain realized by
a Fund which is taxed as ordinary income when distributed to shareholders.

     A Fund may make one or more of the elections available under the Code which
are applicable to straddles.  If a Fund makes any of the elections, the amount,
character and timing of the recognition of gains or losses from the affected
straddle positions will be determined under rules that vary according to the
election(s) made.  The rules applicable under certain of the elections operate
to accelerate the recognition of gains or losses from the affected straddle
positions.

     Because application of the straddle rules may affect the character of gains
or losses, defer losses and/or accelerate the recognition of gains or losses
from the affected straddle positions, the amount which must be distributed to
shareholders, and which will be taxed to shareholders as ordinary income or
long-term capital gain, may be increased or decreased substantially as compared
to a fund that did not engage in such hedging transactions.

     Rules governing the tax aspects of swap agreements are in a developing
stage and are not entirely clear in certain respects.  Accordingly, while the
Funds intend to account for such transactions in a manner they deem to be
appropriate, the Internal Revenue Service might not accept such treatment.  If
it did not, the status of a Fund as a regulated investment company might be
affected.  The Trust intends to monitor developments in this area.  Certain
requirements that must be met under the Code in order for a Fund to qualify as a
regulated investment company may limit the extent to which a Fund will be able
to engage in swap agreements.

     The qualifying income and diversification requirements applicable to a
Fund's assets may limit the extent to which a Fund will be able to engage in
transactions in options, futures contracts, forward contracts, and swap
agreements.

Short Sales

     Certain Funds may make short sales of securities.  Short sales may increase
the amount of short-term capital gain realized by a Fund, which is taxed as
ordinary income when distributed to shareholders.

Passive Foreign Investment Companies

     Certain Funds may invest in the stock of foreign corporations which may be
classified under the Code as passive foreign investment companies ("PFICs").  In
general, a foreign corporation is classified as a PFIC for a taxable year if at
least one-half of its assets constitute investment-type assets or 75% or more of
its gross income is investment-type income.  If a Fund receives a so-called
"excess distribution" with respect to PFIC stock, the Fund itself may be subject
to tax on a portion of the excess distribution, whether or not the corresponding
income is distributed by the Fund to stockholders.  In general, under the PFIC
rules, an excess distribution is treated as having been realized ratably over
the period during which the Fund held the PFIC stock.  A Fund itself will be
subject to tax on the portion, if any, of an excess distribution that is so
allocated to prior taxable years and an interest factor will be added to the
tax, as if the tax had been payable in such prior taxable years.  Certain
distributions from a PFIC as well as gain from the sale of PFIC stock are
treated as excess distributions.  Excess distributions are characterized as
ordinary income even though, absent application of the PFIC rules, certain
excess distributions might have been classified as capital gain.

     A Fund may be eligible to elect alternative tax treatment with respect to
PFIC stock.  Under an election that currently is available in some
circumstances, a Fund generally would be required to include in its gross income
its share of the earnings of a PFIC on a current basis, regardless of whether
distributions are received from the PFIC in a given year.  If this election were
made, the special rules, discussed above, relating to the taxation of excess
distributions, would not apply.  Alternatively, another election may be
available that would involve marking to market a Fund's PFIC shares at the end
of each

                                       72
<PAGE>

taxable year (and on certain other dates prescribed in the Code), with the
result that unrealized gains are treated as though they were realized and
reported as ordinary income. Any mark-to-market losses and any loss from an
actual disposition of PFIC shares would be deductible as ordinary losses to the
extent of any net mark-to-market gains included in income in prior years. If
this election were made, tax at the Fund level under the PFIC rules would
generally be eliminated, but the Fund could, in limited circumstances, incur
nondeductible interest charges. A Fund's intention to qualify annually as a
regulated investment company may limit its elections with respect to PFIC
shares.

     Because the application of the PFIC rules may affect, among other things,
the character of gains and the amount of gain or loss and the timing of the
recognition of income with respect to PFIC shares, and may subject a Fund itself
to tax on certain income from PFIC shares, the amount that must be distributed
to shareholders and will be taxed to shareholders as ordinary income or long-
term capital gain may be increased or decreased substantially as compared to a
fund that did not invest in PFIC shares.

Foreign Currency Transactions

     Under the Code, gains or losses attributable to fluctuations in exchange
rates which occur between the time a Fund accrues income or other receivables or
accrues expenses or other liabilities denominated in a foreign currency and the
time the Fund actually collects such receivables or pays such liabilities
generally are treated as ordinary income or loss.  Similarly, on disposition of
debt securities denominated in a foreign currency and on disposition of certain
other instruments, gains or losses attributable to fluctuations in the value of
the foreign currency between the date of acquisition of the security or contract
and the date of disposition also are treated as ordinary gain or loss.  These
gains and losses, referred to under the Code as "section 988" gains or losses,
may increase or decrease the amount of a Fund's investment company taxable
income to be distributed to its shareholders as ordinary income.

Foreign Taxation

     Income received by the Funds from sources within foreign countries may be
subject to withholding and other taxes imposed by such countries.  Tax
conventions between certain countries and the U.S. may reduce or eliminate such
taxes.  In addition, PIMCO intends to manage the Funds with the intention of
minimizing foreign taxation in cases where it is deemed prudent to do so.  If
more than 50% of the value of the Global Bond, Global Bond II, Foreign Bond, or
Emerging Markets Bond Funds' total assets at the close of their taxable year
consists of securities of foreign corporations, such Fund will be eligible to
elect to "pass-through" to the Fund's shareholders the amount of foreign income
and similar taxes paid by the Fund. If this election is made, a shareholder
generally subject to tax will be required to include in gross income (in
addition to taxable dividends actually received) his pro rata share of the
foreign taxes paid by the Fund, and may be entitled either to deduct (as an
itemized deduction) his or her pro rata share of foreign taxes in computing his
taxable income or to use it (subject to limitations) as a foreign tax credit
against his or her U.S. federal income tax liability.  No deduction for foreign
taxes may be claimed by a shareholder who does not itemize deductions.  Each
shareholder will be notified within 60 days after the close of the Fund's
taxable year whether the foreign taxes paid by the Fund will "pass-through" for
that year.

     Generally, a credit for foreign taxes is subject to the limitation that it
may not exceed the shareholder's U.S. tax attributable to his or her total
foreign source taxable income.  For this purpose, if the pass-through election
is made, the source of the Global Bond, Global Bond II, Foreign Bond, or
Emerging Markets Bond Funds' income will flow through to shareholders of the
Trust.  With respect to such Funds, gains from the sale of securities will be
treated as derived from U.S. sources and certain currency fluctuation gains,
including fluctuation gains from foreign currency-denominated debt securities,
receivables and payables will be treated as ordinary income derived from U.S.
sources.  The limitation on the foreign tax credit is applied separately to
foreign source passive income, and to certain other types of income.
Shareholders may be unable to claim a credit for the full amount of their
proportionate share of the foreign taxes paid by the Fund.  The foreign tax
credit can be used to offset only 90% of the revised

                                       73
<PAGE>

alternative minimum tax imposed on corporations and individuals and foreign
taxes generally are not deductible in computing alternative minimum taxable
income.

Original Issue Discount and Market Discount

     Some of the debt securities (with a fixed maturity date of more than one
year from the date of issuance) that may be acquired by a Fund may be treated as
debt securities that are issued originally at a discount.  Generally, the amount
of the original issue discount ("OID") is treated as interest income and is
included in income over the term of the debt security, even though payment of
that amount is not received until a later time, usually when the debt security
matures.  A portion of the OID includable in income with respect to certain
high-yield corporate debt securities may be treated as a dividend for Federal
income tax purposes.

     Some of the debt securities (with a fixed maturity date of more than one
year from the date of issuance) that may be acquired by a Fund in the secondary
market may be treated as having market discount.  Generally, any gain recognized
on the disposition of, and any partial payment of principal on, a debt security
having market discount is treated as ordinary income to the extent the gain, or
principal payment, does not exceed the "accrued market discount" on such debt
security.  Market discount generally accrues in equal daily installments.  A
Fund may make one or more of the elections applicable to debt securities having
market discount, which could affect the character and timing of recognition of
income.

     Some debt securities (with a fixed maturity date of one year or less from
the date of issuance) that may be acquired by a Fund may be treated as having
acquisition discount, or OID in the case of certain types of debt securities.
Generally, the Fund will be required to include the acquisition discount, or
OID, in income over the term of the debt security, even though payment of that
amount is not received until a later time, usually when the debt security
matures. The Fund may make one or more of the elections applicable to debt
securities having acquisition discount, or OID, which could affect the character
and timing of recognition of income.

     A Fund generally will be required to distribute dividends to shareholders
representing discount on debt securities that is currently includable in income,
even though cash representing such income may not have been received by the
Fund.  Cash to pay such dividends may be obtained from sales proceeds of
securities held by the Fund.

Constructive Sales

     Recently enacted rules may affect the timing and character of gain if a
Fund engages in transactions that reduce or eliminate its risk of loss with
respect to appreciated financial positions.  If a Fund enters into certain
transactions in property while holding substantially identical property, the
Fund would be treated as if it had sold and immediately repurchased the property
and would be taxed on any gain (but not loss) from the constructive sale.  The
character of gain from a constructive sale would depend upon the Fund's holding
period in the property.  Loss from a constructive sale would be recognized when
the property was subsequently disposed of, and its character would depend on the
Fund's holding period and the application of various loss deferral provisions of
the Code.

Non-U.S. Shareholders

     Withholding of Income Tax on Dividends:  Under the 1972 Convention and U.S.
federal tax law, dividends paid on shares beneficially held by a person who is a
"foreign person" within the meaning of the Internal Revenue Code of 1986, as
amended, are, in general, subject to withholding of U.S. federal income tax at a
rate of 30% of the gross dividend, which may, in some cases, be reduced by an
applicable tax treaty.  However, if a beneficial holder who is a foreign person
has a permanent establishment in the United States, and the shares held by such
beneficial holder are effectively connected with such

                                       74
<PAGE>

permanent establishment and, in addition, the dividends are effectively
connected with the conduct by the beneficial holder of a trade or business in
the United States, the dividend will be subject to U.S. federal net income
taxation at regular income tax rates. Distributions of long-term net realized
capital gains will not be subject to withholding of U.S. federal income tax.

     Income Tax on Sale of a Fund's shares:  Under U.S. federal tax law, a
beneficial holder of shares who is a foreign person is not, in general, subject
to U.S. federal income tax on gains (and is not allowed a deduction for losses)
realized on the sale of such shares unless (i) the shares in question are
effectively connected with a permanent establishment in the United States of the
beneficial holder and such gain is effectively connected with the conduct of a
trade or business carried on by such holder within the United States or (ii) in
the case of an individual holder, the holder is present in the United States for
a period or periods aggregating 183 days or more during the year of the sale and
certain other conditions are met.

     State and Local Tax:  A beneficial holder of shares who is a foreign person
may be subject to state and local tax in addition to the federal tax on income
referred above.

     Estate and Gift Taxes:  Under existing law, upon the death of a beneficial
holder of shares who is a foreign person, such shares will be deemed to be
property situated within the United States and will be subject to U.S. federal
estate tax.  If at the time of death the deceased holder is a resident of a
foreign country and not a citizen or resident of the United States, such tax
will be imposed at graduated rates from 18% to 55% on the total value (less
allowable deductions and allowable credits) of the decedent's property situated
within the United States.  In general, there is no gift tax on gifts of shares
by a beneficial holder who is a foreign person.

     The availability of reduced U.S. taxation pursuant to the 1972 Convention
or the applicable estate tax convention depends upon compliance with established
procedures for claiming the benefits thereof and may further, in some
circumstances, depend upon making a satisfactory demonstration to U.S. tax
authorities that a foreign investor qualifies as a foreign person under U.S.
domestic tax law and the 1972 Convention.

Other Taxation

     Distributions also may be subject to additional state, local and foreign
taxes, depending on each shareholder's particular situation.  Under the laws of
various states, distributions of investment company taxable income generally are
taxable to shareholders even though all or a substantial portion of such
distributions may be derived from interest on certain federal obligations which,
if the interest were received directly by a resident of such state, would be
exempt from such state's income tax ("qualifying federal  obligations").
However, some states may exempt all or a portion of such distributions from
income tax to the extent the shareholder is able to establish that the
distribution is derived from qualifying federal obligations.  Moreover, for
state income tax purposes, interest on some federal obligations generally is not
exempt from taxation, whether received directly by a shareholder or through
distributions of investment company taxable income (for example, interest on
FNMA Certificates and GNMA Certificates).  Each Fund will provide information
annually to shareholders indicating the amount and percentage of a Fund's
dividend distribution which is attributable to interest on federal obligations,
and will indicate to the extent possible from what types of federal obligations
such dividends are derived.  Shareholders are advised to consult their own tax
advisers with respect to the particular tax consequences to them of an
investment in a Fund.

                               OTHER INFORMATION

Capitalization

     The Trust is a Massachusetts business trust established under a Declaration
of Trust dated February 19, 1987.  The capitalization of the Trust consists
solely of an unlimited number of shares of

                                       75
<PAGE>

beneficial interest with a par value of $0.0001 each. The Board of Trustees may
establish additional series (with different investment objectives and
fundamental policies) at any time in the future. Establishment and offering of
additional series will not alter the rights of the Trust's shareholders. When
issued, shares are fully paid, non-assessable, redeemable and freely
transferable. Shares do not have preemptive rights or subscription rights. In
liquidation of a Fund, each shareholder is entitled to receive his pro rata
share of the net assets of that Fund.

     Under Massachusetts law, shareholders could, under certain circumstances,
be held personally liable for the obligations of the Trust. However, the
Declaration of Trust disclaims liability of the shareholders, Trustees or
officers of the Trust for acts or obligations of the Trust, which are binding
only on the assets and property of the Trust, and requires that notice of the
disclaimer be given in each contract or obligation entered into or executed by
the Trust or the Trustees. The Declaration of Trust also provides for
indemnification out of Trust property for all loss and expense of any
shareholder held personally liable for the obligations of the Trust. The risk of
a shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which such disclaimer is inoperative or the Trust
itself is unable to meet its obligations, and thus should be considered remote.

Performance Information

     From time to time the Trust may make available certain information about
the performance of some or all of the classes of shares of some or all of the
Funds. Information about a Fund's performance is based on that Fund's (or its
predecessor's) record to a recent date and is not intended to indicate future
performance.

     The total return of classes of shares of all Funds may be included in
advertisements or other written material. When a Fund's total return is
advertised , it will be calculated for the past year, the past five years, and
the past ten years (or if the Fund has been offered for a period shorter than
one, five or ten years, that period will be substituted) since the establishment
of the Fund (or its predecessor series of PIMCO Advisors Funds for the Global
Bond Fund II), as more fully described below. For periods prior to the initial
offering date of a particular class of shares, total return presentations for
the class will be based on the historical performance of an older class of the
Fund (if any) restated to reflect any different sales charges and/or operating
expenses (such as different administrative fees and/or 12b-1/servicing fee
charges) associated with the newer class.  In certain cases, such a restatement
will result in performance of the newer class which is higher than if the
performance of the older class were not restated to reflect the different
operating expenses of the newer class. In such cases, the Trust's advertisements
will also, to the extent appropriate, show the lower performance figure
reflecting the actual operating expenses incurred by the older class for periods
prior to the initial offering date of the newer class. Total return for each
class is measured by comparing the value of an investment in the Fund at the
beginning of the relevant period to the redemption value of the investment in
the Fund at the end of the period (assuming immediate reinvestment of any
dividends or capital gains distributions at net asset value). Total return may
be advertised using alternative methods that reflect all elements of return, but
that may be adjusted to reflect the cumulative impact of alternative fee and
expense structures.

     The Funds may also provide current distribution information to its
shareholders in shareholder reports or other shareholder communications, or in
certain types of sales literature provided to prospective investors. Current
distribution information for a particular class of a Fund will be based on
distributions for a specified period (i.e., total dividends from net investment
income), divided by the relevant class net asset value per share on the last day
of the period and annualized. The rate of current distributions does not reflect
deductions for unrealized losses from transactions in derivative instruments
such as options and futures, which may reduce total return. Current distribution
rates differ from standardized yield rates in that they represent what a class
of a Fund has declared and paid to shareholders as of the end of a specified
period rather than the Fund's actual net investment income for that period.

                                       76
<PAGE>

     Performance information is computed separately for each class of a Fund.
The Trust may, from time to time, include the yield and effective yield of the
Money Market Fund, and the yield and total return for each class of shares of
all of the Funds in advertisements or information furnished to shareholders or
prospective investors.  Each Fund may from time to time include in
advertisements the ranking of the Fund's performance figures relative to such
figures for groups of mutual funds categorized by Lipper Analytical Services as
having the same investment objectives.  Information provided to any newspaper or
similar listing of the Fund's net asset values and public offering prices will
separately present each class of shares.  The Funds also may compute current
distribution rates and use this information in their prospectuses and statement
of additional information, in reports to current shareholders, or in certain
types of sales literature provided to prospective investors.

Calculation of Yield

     Current yield for the Money Market Fund will be based on the change in the
value of hypothetical investment (exclusive of capital changes) over a
particular 7-day period less a pro-rata share of Fund expenses accrued over that
period (the "base period"), and stated as a percentage of the investment at the
start of the base period (the "base period return").  The base period return is
then annualized by multiplying by 365/7, with the resulting yield figure carried
to at least the nearest hundredth of one percent. "Effective yield" for the
Money Market Fund assumes that all dividends received during an annual period
have been reinvested.  Calculation of "effective yield" begins with the same
"base period return" used in the calculation of yield, which is then annualized
to reflect weekly compounding pursuant to the following formula:

          Effective Yield = [(Base Period Return +1)/365/7/] - 1

     The effective yield of the Money Market Fund for the seven day period ended
March 31, 1999 was as follows:  Institutional Class - 4.62%, Administrative
Class - 4.24%, Class A - 4.26%, Class B - 3.40% and Class C - 4.31%.

     Quotations of yield for the remaining Funds will be based on all investment
income per share (as defined by the SEC) during a particular 30-day (or one
month) period (including dividends and interest), less expenses accrued during
the period ("net investment income"), and are computed by dividing net
investment income by the maximum offering price per share on the last day of the
period, according to the following formula:

          YIELD = 2[( a-b + 1)/6/-1]
                      ---
                      cd

     where   a = dividends and interest earned during the period,

             b = expenses accrued for the period (net of reimbursements),

             c = the average daily number of shares outstanding during the
                 period that were entitled to receive dividends, and

             d = the maximum offering price per share on the last day of the
                 period.

                                       77
<PAGE>

     For the one month period ended March 31, 1999, the yield of the Funds was
as follows (all numbers are annualized) (Class J and Class K shares were not
offered during the period listed):

                                Yield for Period
                              Ended March 31, 1999
                              --------------------

<TABLE>
<CAPTION>
                                         Institutional        Administrative
                                         -------------        --------------
Fund                                         Class                Class           Class A      Class B    Class C    Class D
- ----                                         -----                -----           --------     --------   --------   --------

<S>                                    <C>                  <C>                   <C>          <C>        <C>        <C>
Money Market Fund                            4.79%                 4.34%             4.36%        3.52%      4.40%     N/A
Short-Term Fund                              5.16                  4.90              4.66         4.01       4.46       4.86%
Low Duration Fund                            5.95                  5.70              5.31         4.72       4.97       5.63
Low Duration Fund II                         5.64                  5.39              N/A          N/A        N/A        N/A
Low Duration Fund III                        5.51                  N/A               N/A          N/A        N/A        N/A
Low Duration Mortgage Fund                   6.19                  N/A               N/A          N/A        N/A        N/A
Moderate Duration Fund                       5.81                  N/A               N/A          N/A        N/A        N/A
Real Return Bond Fund                        7.10                  N/A               6.48         5.94       6.19       5.42
Total Return Fund                            5.89                  5.64              5.17         4.65       4.66       5.57
Total Return Fund II                         5.52                  5.27              N/A          N/A        N/A        N/A
Total Return Fund III                        5.79                  5.54              N/A          N/A        N/A        N/A
Total Return Mortgage Fund                   5.82                  N/A               N/A          N/A        N/A        N/A
High Yield Fund                              8.32                  8.07              7.55         7.15       7.15       7.92
Long-Term U.S. Govt. Fund                    6.43                  6.17              5.74         5.25       5.26       N/A
Municipal Bond Fund                          4.48                  4.27              4.01         3.38       3.63       4.11
Global Bond Fund                             6.88                  6.62              N/A          N/A        N/A        N/A
Global Bond Fund II                          6.30                  N/A               5.62         5.14       5.14       N/A
Foreign Bond Fund                            6.49                  6.23              5.76         5.28       5.28       6.03
Emerging Markets Bond Fund                  11.75                 11.50             10.83        10.61      10.60       N/A
Strategic Balanced Fund                      5.01                  N/A              N/A          N/A        N/A         4.73
StocksPLUS Fund                              5.11                  4.86              4.58         3.99       4.25       4.73
</TABLE>

     The yield of each such Fund will vary from time to time depending upon
market conditions, the composition of the Fund's portfolio and operating
expenses of the Trust allocated to the Fund or its classes of shares.  These
factors, possible differences in the methods used in calculating yield (and the
tax exempt status of distributions for the Municipal Funds) should be considered
when comparing a Fund's yield to yields published for other investment companies
and other investment vehicles.  Yield should also be considered relative to
changes in the value of a Fund's various classes of shares.  These yields do not
take into account any applicable contingent deferred sales charges.

     The Municipal Funds may advertise a tax equivalent yield of each class of
its shares, calculated as described above except that, for any given tax
bracket, net investment income of each class will be calculated using as gross
investment income an amount equal to the sum of (i) any taxable income of each
class of the Fund plus (ii) the tax exempt income of each class of the Fund
divided by the difference between 1 and the effective federal income tax rates
for taxpayers in that tax bracket.  For example,

                                       78
<PAGE>

taxpayers with the marginal federal income tax rates indicated in the following
table would have to earn the tax equivalent yields shown in order to realize an
after-tax return equal to the corresponding tax-exempt yield shown.

<TABLE>
<CAPTION>

                                                                                  A tax-exempt yield of
Filing Status                                                               is equivalent to a taxable yield of
<S>                      <C>                        <C>                   <C>        <C>        <C>       <C>       <C>
Single                   (Married filing jointly)                             3%         4%         5%        6%        7%
Taxable income                                      Marginal tax rate*
$23,350 or less          $39,000 or less                     15%             3.53%      4.71%     5.88%     7.06%    8.24%
Over $23,350 but         Over $39,000 but                    28%             4.17%      5.56%     6.94%     8.33%     9.72 %
  not over $56,550       not over $94,250
Over $56,550 but         Over $94,250 but                    31%             4.35%      5.80%     7.25%     8.70%   10.14%
  not over $117,950      not over $143,600
Over $117,950 but        Over $143,600 but                   36%             4.69%      6.25%     7.81%     9.38%   10.94%
  not over $256,500      not over $256,500
Over $256,500            Over $256,500                     39.6%             4.97%      6.62%     8.28%     9.93%   11.59%
- -------------------
</TABLE>
* These marginal tax rates do not take into account the effect of the phase out
  of itemized deductions and personal exemptions.

     As is shown in the above table, the advantage of tax-exempt investing
becomes more advantageous to an investor as his or her marginal tax rate
increases.

     The Trust, in its advertisements, may refer to pending legislation from
time to time and the possible impact of such legislation on investors,
investment strategy and related matters.  This would include any tax proposals
and their effect on marginal tax rates and tax-equivalent yields.  At any time
in the future, yields and total return may be higher or lower than past yields
and there can be no assurance that any historical results will continue.

Calculation of Total Return

     Quotations of average annual total return for a Fund or class will be
expressed in terms of the average annual compounded rate of return of a
hypothetical investment in the Fund or class over periods of one, five and ten
years (up to the life of the Fund), calculated pursuant to the following
formula:  P (1 + T)n = ERV (where P = a hypothetical initial payment of $1,000,
T = the average annual total return, n = the number of years, and ERV = the
ending redeemable value of a hypothetical $1,000 payment made at the beginning
of the period).  Except as noted below all total return figures reflect the
deduction of a proportional share of Fund or class expenses on an annual basis,
and assume that (i) the maximum sales load (or other charges deducted from
payments) is deducted from the initial $1,000 payment and that the maximum
contingent deferred sales charge, if any, is deducted at the times, in the
amounts, and under the terms disclosed in the Prospectuses and (ii) all
dividends and distributions are reinvested when paid.  The Funds also may, with
respect to certain periods of less than one year, provide total return
information for that period that is unannualized.  Quotations of total return
may also be shown for other periods.  Any such information would be accompanied
by standardized total return information.

                                       79
<PAGE>

  The table below sets forth the average annual total return of each class of
shares of the following Funds for the periods ended March 31, 1999.  For periods
prior to the "Inception Date" of a particular class of a Fund's shares, total
return presentations for the class are based on the historical performance of
Institutional Class shares of the Fund (the oldest class) adjusted, as
necessary, to reflect any current sales charges (including any contingent
deferred sales charges) associated with the newer class and any different
operating expenses associated with the newer class, such as 12b-1 distribution
and servicing fees (which are not paid by the Institutional Class) and
administrative fee charges.

                 Total Return for Periods Ended March 31, 1999*

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                                                                    Since Inception    Inception   Inception
                                                                        of Fund         Date of     Date of
     Fund            Class**       1 Year    5 Years    10 Years     (Annualized)       Fund        Class
- -------------------------------------------------------------------------------------------------------------
<S>               <C>              <C>       <C>        <C>         <C>                <C>         <C>
Money Market      Institutional      5.14%      5.27%        N/A               4.70%    03/01/91    03/01/91
                  Administrative     4.93       5.03                           4.45                 01/24/95
                  Class A            4.76       4.97                           4.42                 01/13/97
                  Class B            4.03       4.09                           3.52                 01/13/97
                  Class C            4.85       5.00                           4.44                 01/13/97
- ------------------------------------------------------------------------------------------------------------
Short-Term        Institutional      5.63%      6.54%       6.32%              6.52%    10/07/87    10/07/87
                  Administrative     5.39       6.28        6.05               6.26                 02/01/96
                  Class A            3.11       5.69        5.68               5.91                 01/20/97
                  Class B           -0.55       5.03        5.33               5.61                 01/20/97
                  Class C            3.91       5.81        5.58               5.78                 01/20/97
                  Class D            5.33       6.23        6.00               6.21                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Low Duration      Institutional      6.35%      6.99%       8.25%              8.13%    05/11/87    05/11/87
                  Administrative     6.09       6.72        7.98               7.86                 12/31/94
                  Class A            2.68       5.85        7.42               7.35                 01/13/97
                  Class B            0.10       5.37        7.18               7.15                 01/13/97
                  Class C            4.34       5.97        7.22               7.10                 01/13/97
                  Class D            6.01       6.65        7.90               7.79                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Low Duration II   Institutional      5.89%      6.52%        N/A               6.45%    11/01/91    11/01/91
                  Administrative     5.63       6.25                           6.18                 02/02/98
- ------------------------------------------------------------------------------------------------------------
Low Duration      Institutional      6.10%   N/A             N/A               6.49%    12/31/96    12/31/96
 III
- ------------------------------------------------------------------------------------------------------------
Low Duration      Institutional      5.71%       N/A         N/A               6.99%    07/31/97    07/31/97
 Mortgage
- ------------------------------------------------------------------------------------------------------------
Moderate          Institutional      6.67%       N/A         N/A               7.17%    12/31/96    12/31/96
 Duration
- ------------------------------------------------------------------------------------------------------------
Real Return       Institutional      6.41%       N/A         N/A               5.15%    01/29/97    01/29/97
 Bond             Class A            2.81                                      3.27                 01/29/97
                  Class B            0.19                                      2.65                 01/29/97
                  Class C            4.46                                      4.20                 01/29/97
                  Class D            5.99                                      4.74                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Total Return      Institutional      7.59%      8.39%      10.13%              9.64%    05/11/87    05/11/87
                  Administrative     7.32       8.13        9.87               9.37                 09/07/94
                  Class A            2.27       6.90        9.13               8.72                 01/13/97
                  Class B            1.40       6.80        9.07               8.67                 01/13/97
                  Class C            5.32       7.11        8.84               8.35                 01/13/97
                  Class D            7.26       8.06        9.80               9.30                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Total Return II   Institutional      7.45%      8.27%        N/A               8.11%    12/30/91    12/30/91
                  Administrative     7.18       7.99                           7.84                 11/30/94
- ------------------------------------------------------------------------------------------------------------
</TABLE>

                                       80
<PAGE>

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                                                                    Since Inception    Inception   Inception
                                                                        of Fund         Date of     Date of
     Fund            Class**       1 Year    5 Years    10 Years     (Annualized)       Fund        Class
- -------------------------------------------------------------------------------------------------------------
<S>               <C>                <C>        <C>          <C>               <C>      <C>         <C>
Total Return      Institutional      8.19%      8.48%        N/A               9.43%    05/01/91    05/01/91
III               Administrative     7.91       8.19                           9.16                 04/11/97
- -------------------------------------------------------------------------------------------------------------
Total Return      Institutional      5.85%       N/A         N/A               7.41%    07/31/97    07/31/97
Mortgage
- ------------------------------------------------------------------------------------------------------------
High Yield        Institutional      4.73%     11.23%        N/A              11.71%    12/16/92    12/16/92
                  Administrative     4.48      10.96                          11.44                 01/16/95
                  Class A           -0.37       9.79                          10.48                 01/13/97
                  Class B           -1.27       9.73                          10.49                 01/13/97
                  Class C            2.58      10.01                          10.50                 01/13/97
                  Class D            4.35      10.83                          11.31                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Long-Term U.S.    Institutional      7.75%     10.39%        N/A              12.11%    07/01/91    07/01/91
Government        Administrative     7.45      10.12                          11.85                 09/23/97
                  Class A            2.51       8.96                          11.04                 01/20/97
                  Class B            1.64       8.84                          10.95                 01/20/97
                  Class C            5.54       9.15                          10.89                 01/20/97
- ------------------------------------------------------------------------------------------------------------
Global Bond       Institutional      6.90%      8.36%        N/A               7.80%    11/23/93    11/23/93
                  Administrative     6.77       8.13                           7.57                 08/01/96
- ------------------------------------------------------------------------------------------------------------
Foreign Bond      Institutional      7.91%     11.33%        N/A              11.01%    12/03/92    12/03/92
                  Administrative     7.64      11.06                          10.74                 01/28/97
                  Class A            2.59       9.82                           9.72                 01/20/97
                  Class B            1.74       9.75                           9.72                 01/20/97
                  Class C            5.64      10.02                           9.72                 01/20/97
                  Class D            7.45      10.85                          10.53                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Emerging          Institutional    -12.56%       N/A         N/A              -6.03%    07/31/97    07/31/97
 Markets Bond     Administrative   -13.62                                     -6.82                 09/30/98
                  Class A          -16.82                                     -8.95                 07/31/97
                  Class B          -17.47                                     -9.05                 07/31/97
                  Class C          -14.35                                     -7.13                 07/31/97

- ------------------------------------------------------------------------------------------------------------
Municipal Bond    Institutional      6.04%       N/A         N/A               5.49%    12/31/97    12/31/97
                  Administrative     5.44                                      4.94                 09/30/98
                  Class A            2.50                                      2.57                 04/01/98
                  Class B           -0.12                                      1.13                 04/01/98
                  Class C            4.10                                      4.58                 04/01/98
                  Class D            5.67                                      5.11                 04/08/98
- ------------------------------------------------------------------------------------------------------------
Strategic         Institutional     12.36%       N/A         N/A              20.61%    06/28/96    06/28/96
 Balanced         Class D           11.89                                     20.15                 04/08/98

- ------------------------------------------------------------------------------------------------------------
StocksPLUS        Institutional     17.65%     26.99%        N/A              23.38%    05/14/93    05/14/93
                  Administrative    17.21      26.61                          23.01                 01/07/97
                  Class A           13.56      25.70                          22.24                 01/20/97
                  Class B           11.12      25.39                          21.91                 01/20/97
                  Class C           15.48      25.83                          22.25                 01/20/97
                  Class D           17.02      26.45                          22.86                 04/08/98
- ------------------------------------------------------------------------------------------------------------
</TABLE>

  *  Average annual total return presentations for a particular class of shares
  assume payment of the current maximum sales charge (if any) applicable to that
  class at the time of purchase and assume that the maximum CDSC (if any) for
  Class A, Class B and Class C shares was deducted at the times, in the amounts,
  and under the terms discussed in the Class A, B and C Prospectus.

                                       81
<PAGE>

      **  For all Funds listed above, Class A, Class B, Class C, Class D and
      Administrative Class total return presentations for periods prior to the
      Inception Date of that class reflect the prior performance of
      Institutional Class shares of the Fund (the oldest class) adjusted to
      reflect the actual sales charges (none in the case of Class D and
      Administrative Class) of the newer class. The adjusted performance also
      reflects the higher Fund operating expenses associated with Class A, Class
      B, Class C, Class D and Administrative Class shares. These include (i)
      12b-1 distribution and servicing fees, which are not paid by the
      Institutional Class but are paid by Class B and Class C (at a maximum rate
      of 1.00% per annum) and Class A and the Administrative Class (at a maximum
      rate of 0.25% per annum), and may be paid by Class D (at a maximum of
      0.25% per annum), and (ii) administration fee charges associated with
      Class A, Class B and Class C shares (at a maximum differential of 0.22%
      per annum) and Class D shares (at a maximum differential of 0.45% per
      annum).

          The table below sets forth the average annual total return of certain
   classes of shares of the Global Bond Fund II (which was a series of PIMCO
   Advisors Funds ("PAF") prior to its reorganization as a Fund of the Trust on
   January 17, 1997) for the periods ended March 31, 1999. Accordingly,
   "Inception Date of Fund" refers to the inception date of the PAF predecessor
   series. Since Class A shares were offered since the inception of Global Bond
   Fund II, total return presentations for periods prior to the Inception Date
   of the Institutional Class are based on the historical performance of Class A
   shares, adjusted to reflect that the Institutional Class does not have a
   sales charge, and the different operating expenses associated with the
   Institutional Class, such as 12b-1 distribution and servicing fees and
   administration fee charges.

                 Total Return for Periods Ended March 31, 1999*

<TABLE>
<CAPTION>
                                                                 Since Inception
                                                                     of Fund        Inception   Inception
                                                                  (Annual-ized)      Date of     Date of
     Fund            Class**      1 Year    5 Years   10 Years                        Fund        Class
- ---------------------------------------------------------------------------------------------------------
<S>               <C>             <C>       <C>       <C>        <C>                <C>         <C>
Global Bond II    Institutional     6.06%     N/A       N/A                10.44%    10/02/95    02/25/98
                  Class A           0.89                                    8.58                 10/02/95
                  Class B          -0.13                                    8.49                 10/02/95
                  Class C           3.83                                    9.17                 10/02/95
- ---------------------------------------------------------------------------------------------------------
</TABLE>

   *  Average annual total return presentations for a particular class of shares
   assume payment of the current maximum sales charge (if any) applicable to
   that class at the time of purchase and assume that the maximum CDSC (if any)
   for Class A, Class B and Class C shares was deducted at the times, in the
   amounts, and under the terms discussed in the Class A, B and C Prospectus.

   **  Institutional Class total return presentations for periods prior to the
   Inception Date of that class reflect the prior performance of Class A shares
   of the former PAF series, adjusted to reflect the fact that there are no
   sales charges on Institutional Class shares of the Fund. The adjusted
   performance also reflects any different operating expenses associated with
   Institutional Class shares. These include (i) 12b-1 distribution and
   servicing fees, which are not paid by the Institutional Class but are paid by
   Class A (at a maximum rate of 0.25% per annum), and (ii) administration fee
   charges, which are lower for Institutional class shares (at a differential of
   0.15% per annum).

   Note also that, prior to January 17, 1997, Class A, Class B and Class C
   shares of the Global Bond Fund II were subject to a variable level of
   expenses for such services as legal, audit, custody and transfer agency
   services. As described in the Class A, B and C Prospectus, for periods
   subsequent to January 17, 1997, Class A, Class B and Class C shares of the
   Trust are subject to a fee structure which essentially fixes these expenses
   (along with other administrative expenses) under a single administrative fee
   based on the average daily net assets of the Fund attributable to Class A,
   Class B and Class C shares. Under the current fee structure, the Global Bond
   Fund II is expected to have

                                       82
<PAGE>

   lower total Fund operating expenses than its predecessor had under the fee
   structure for PAF (prior to January 17, 1997). All other things being equal,
   the higher expenses of PAF would have adversely affected total return
   performance for the Fund after January 17, 1997.

   The method of adjustment used in the table above for periods prior to the
   Inception Date of Institutional Class shares of the Global Bond Fund II
   resulted in performance for the period shown which is higher than if the
   historical Class A performance were not adjusted to reflect the lower
   operating expenses of the newer class. The following table shows the lower
   performance figures that would be obtained if the performance for the
   Institutional Class was calculated by tacking to the Institutional Class'
   actual performance the actual performance of Class A shares (with their
   higher operating expenses) for periods prior to the initial offering date of
   the newer class (i.e. the total return presentations below are based, for
   periods prior to the inception date of the Institutional Class, on the
   historical performance of Class A shares adjusted to reflect the current
   sales charges associated with Class A shares, but not reflecting lower
                                                     ---
   operating expenses associated with the Institutional Class, such as lower
   administrative fee charges and/or distribution and servicing fee charges).

                 Total Return for Periods Ended March 31, 1999
        (with no adjustment for operating expenses of the Institutional
                 Class for periods prior to its Inception Date)

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------
                                                                         Since Inception
                                                                             of Fund
              Fund            Class       1 Year    5 Years   10 Years     (Annualized)
- -----------------------------------------------------------------------------------------
<S>                       <C>             <C>       <C>       <C>        <C>
Global Bond II            Institutional    6.06%     N/A       N/A            10.16%
- -----------------------------------------------------------------------------------------
</TABLE>


  Current distribution information for a Fund will be based on distributions for
a specified period (i.e., total dividends from net investment income), divided
by Fund net asset value per share on the last day of the period and annualized
according to the following formula:

  DIVIDEND YIELD = (((a/b)*365)/c)

     where  a =    actual dividends distributed for the calendar month in
                   question,

            b =    number of days of dividend declaration in the month in
                   question, and

            c =    net asset value (NAV) calculated on the last business day of
                   the month in question.

  The rate of current distributions does not reflect deductions for unrealized
losses from transactions in derivative instruments such as options and futures,
which may reduce total return. Current distribution rates differ from
standardized yield rates in that they represent what a Fund has declared and
paid to shareholders as of the end of a specified period rather than the Fund's
actual net investment income for that same period.  Distribution rates will
exclude net realized short-term capital gains.  The rate of current
distributions for a Fund should be evaluated in light of these differences and
in light of the Fund's total return figures, which will always accompany any
calculation of the rate of current distributions.

                                       83
<PAGE>

  For the month ended March 31, 1999, the current distribution rates
(annualized) for the Funds were as follows (Class J and Class K shares were not
offered during the period listed):

                               Distribution Rate
                               -----------------

<TABLE>
<CAPTION>
                                         Institutional        Administrative
                                         -------------        --------------
Fund                                         Class                Class           Class A      Class B    Class C    Class D
- ----                                         -----                -----           --------     --------   --------   --------
<S>                                  <C>                  <C>                   <C>        <C>        <C>        <C>
Money Market Fund                              4.52%             4.15%               4.18%      3.35%      4.23%     N/A
Short-Term Fund                                5.12              4.86                4.72       3.97       4.42      4.82%
Low Duration Fund                              6.59              6.33                6.11       5.36       5.61      6.26
Low Duration Fund II                           5.64              5.40                N/A        N/A        N/A        N/A
Low Duration Fund III                          5.60              5.53                N/A        N/A        N/A        N/A
Low Duration Mortgage Fund                     5.86               N/A                N/A        N/A        N/A        N/A
Moderate Duration Fund                         5.97               N/A                N/A        N/A        N/A        N/A
Real Return Bond Fund                          7.10               N/A                6.68       5.94       6.19       6.69
Total Return Fund                              5.53              5.28                5.06       4.31       4.32       5.22
Total Return Fund II                           5.38              5.10                N/A        N/A        N/A        N/A
Total Return Fund III                          5.86              5.61                N/A        N/A        N/A        N/A
Total Return Mortgage Fund                     5.51               N/A                N/A        N/A        N/A        5.12
High Yield Fund                                8.72              8.48                8.33       7.57       7.58       8.34
Municipal Bond Fund                            4.60              4.37                4.25       3.50       3.75       4.25
Long-Term U.S. Govt. Fund                      6.08              5.83                5.68       4.92       4.93       N/A
Global Bond Fund                               5.71              5.46                N/A        N/A        N/A        N/A
Global Bond Fund II                            5.31               N/A                4.91       4.16       4.16       N/A
Foreign Bond Fund                              5.04              4.79                4.59       3.84       3.84       4.59
Emerging Markets Bond Fund                    12.76             12.52               12.37      11.64      11.64       N/A
Strategic Balanced Fund                         N/A               N/A                N/A        N/A        N/A        N/A
StocksPLUS Fund                                 N/A               N/A                N/A        N/A        N/A        N/A
</TABLE>

  Performance information for a Fund may also be compared to various unmanaged
indexes, such as the Standard & Poor's 500 Composite Stock Price Index, the Dow
Jones Industrial Average, the Lehman Brothers Aggregate Bond Index, the Lehman
Brothers Mortgage-Backed Securities Index, the Merrill Lynch 1 to 3 Year
Treasury Index, the Lehman Intermediate and 20+ Year Treasury Blend Index, the
Lehman BB Intermediate Corporate Index, indexes prepared by Lipper Analytical
Services, the J.P. Morgan Global Index, the J.P. Morgan Emerging Markets Bond
Index Plus, the Salomon Brothers World Government Bond Index-10 Non U.S.-Dollar
Hedged and the J.P. Morgan Government Bond Index Non U.S.-Dollar Hedged.
Unmanaged indexes (i.e., other than Lipper) generally do not reflect deductions
for administrative and management costs and expenses.  PIMCO may report to
shareholders or to the public in advertisements concerning the performance of
PIMCO as adviser to clients other than the Trust, or on the comparative
performance or standing of PIMCO in relation to other money managers.  PIMCO
also may provide current or prospective private account clients, in connection
with standardized performance information for the Funds, performance information
for the Funds gross of fees and expenses for the purpose of assisting such
clients in evaluating similar performance information provided by other
investment managers or institutions.  Comparative information may be compiled or
provided by independent ratings services or by news organizations.  Any
performance information, whether related to the Funds or to PIMCO, should be
considered in light of the Funds' investment objectives and policies,
characteristics and quality of the Funds, and the market conditions during the
time period indicated, and should not be considered to be representative of what
may be achieved in the future.

  Advertisements and information relating to the Global Bond Fund II may use
data comparing the total returns of the top foreign bond market as compared to
the total return of the U.S. bond market for a particular year. For instance,
the following table sets forth the total return of the top foreign bond market

                                       84
<PAGE>

compared to the total return for the U.S. bond market for the years 1986 through
1998. Performance is shown in U.S. dollar terms, hedged for currency rate
changes and is no way indicative of the performance of the Global Bond Fund II.
<TABLE>
<CAPTION>

                        Top Foreign
                Year     Performer     U.S.
               ------   -----------   ------
<S>            <C>      <C>           <C>

     1986      +13.1%   Japan         +15.7%
     1987      +12.8    UK             +1.9
     1988      +15.0    France         +7.0
     1989      +10.0    Canada        +14.4
     1990      +11.0    Australia      +8.6
     1991      +20.0    Australia     +15.3
     1992      +10.5    UK             +7.2
     1993      +20.0    Italy         +11.0
     1994       -0.9    Japan          -3.4
     1995      +21.0    Netherlands   +18.3
     1996      +18.8    Spain          +2.7
     1997      +13.5    UK             +9.6
     1998      +17.4    UK             +8.7
</TABLE>

  Source: Salomon Brothers World Government Bond Index 1986-1998.

  The Trust may use, in its advertisements and other information, data
concerning the projected cost of a college education in future years based on
1996/1997 costs of college and an assumed rate of increase for such costs. For
example, the table below sets forth the projected cost of four years of college
at a public college and a private college assuming a steady increase in both
cases of 3% per year. In presenting this information, the Trust is making no
prediction regarding what will be the actual growth rate in the cost of a
college education, which may be greater or less than 3% per year and may vary
significantly from year to year. The Trust makes no representation that an
investment in any of the Funds will grow at or above the rate of growth of the
cost of a college education.
<TABLE>
<CAPTION>

Potential College Cost Table
<S>               <C>             <C>       <C>     <C>       <C>

Start             Public          Private   Start   Public    Private
Year              College         College   Year    College   College
- ------            -------         -------   -----   -------   -------
1997             $13,015          $57,165    2005   $16,487   $72,415
1998             $13,406          $58,880    2006   $16,982   $74,587
1999             $13,808          $60,646    2007   $17,491   $76,825
2000             $14,222          $62,466    2008   $18,016   $79,130
2001             $14,649          $64,340    2009   $18,557   $81,504
2002             $15,088          $66,270    2010   $19,113   $83,949
2003             $15,541          $68,258    2011   $19,687   $86,467
2004             $16,007          $70,306    2012   $20,278   $89,061
</TABLE>

Costs assume a steady increase in the annual cost of college of 3% per year from
a 1996-97 base year amount. Actual rates of increase may be more or less than 3%
and may vary.

                                       85
<PAGE>

  In its advertisements and other materials, the Trust may compare the returns
over periods of time of investments in stocks, bonds and treasury bills to each
other and to the general rate of inflation. For example, the average annual
return of each during the 25 years from 1974 to 1998 was:

     *Stocks:      14.9%
      Bonds:        9.9%
      T-Bills:      7.0%
      Inflation:    5.2%

     *Returns of unmanaged indices do not reflect past or future performance of
any of the Funds of PIMCO Funds:  Pacific Investment Management Series.  Stocks
are represented by Ibbotson's  Large Company Total Return Index. Bonds are
represented by Ibbotson's Long-term Corporate Bond Index. T-bills are
represented by Ibbotson's Treasury Bill Index and Inflation is represented by
the Cost of Living Index. These are all unmanaged indices, which can not be
invested in directly. While Treasury bills are insured and offer a fixed rate of
return, both the principal and yield of investment securities will fluctuate
with changes in market conditions. Source: Ibbotson, Roger G., and Rex A.
Sinquefiled, Stocks, Bonds, Bill and Inflation (SBBI), 1989, updated in Stocks,
Bonds, Bills and Inflation 1999 Yearbook, Ibbotson Associates, Chicago. All
rights reserved.

     The Trust may also compare the relative historic returns and range of
returns for an investment in each of common stocks, bonds and treasury bills to
a portfolio that blends all three investments. For example, over the 20 years
from 1979-1998, the average annual return of stocks comprising the Ibbotson's
Large Company Stock Total Return Index ranged from -4.9% to 37.4% while the
annual return of a hypothetical portfolio comprised 40% of such common stocks,
40% of bonds comprising the Ibbotson's Long-term Corporate bond Index and 20% of
Treasury bills comprising the Ibbotson's Treasury Bill Index (a "mixed
portfolio") would have ranged from -1.0% to 28.2% over the same period. The
average annual returns of each investment for each of the years from 1979
through 1998 is set forth in the following table.
<TABLE>
<CAPTION>

                                                        MIXED
YEAR       STOCKS    BONDS    T-BILLS    INFLATION    PORTFOLIO
- --------   -------   ------   --------   ----------   ----------
<S>        <C>       <C>      <C>        <C>          <C>
1979        18.44%   -4.18%     10.38%       13.31%        7.78%
1980        32.42%    2.61%     11.24%       12.40%       14.17%
1981        -4.91%   -0.96%     14.71%        8.94%        0.59%
1982        21.41%   43.79%     10.54%        3.87%       28.19%
1983        22.51%    4.70%      8.80%        3.80%       12.64%
1984         6.27%   16.39%      9.85%        3.95%       11.03%
1985        32.16%   30.90%      7.72%        3.77%       26.77%
1986        18.47%   19.85%      6.16%        1.13%       16.56%
1987         5.23%   -0.27%      5.46%        4.41%        3.08%
1988        16.81%   10.70%      6.35%        4.42%       12.28%
1989        31.49%   16.23%      8.37%        4.65%       20.76%
1990        -3.17%    6.87%      7.52%        6.11%        2.98%
1991        30.55%   19.79%      5.88%        3.06%       21.31%
1992         7.67%    9.39%      3.51%        2.90%        7.53%
1993        10.06%   13.17%      2.89%        2.75%        9.84%
1994         1.31%   -5.76%      3.90%        2.67%       -1.00%
1995        37.40%   27.20%      5.60%        2.70%       26.90%
1996        23.10%    1.40%      5.20%        3.30%       10.84%
1997        33.40%   12.90%      7.10%        1.70%       19.94%
1998        28.58%   10.76%      4.86%        1.61%       16.70%
</TABLE>

*Returns of unmanaged indices do not reflect past or future performance of any
of the Funds of PIMCO Funds: Pacific Investment Management Series. Stocks are
represented by Ibbotson's Large Company

                                       86
<PAGE>

Stock Total Return Index. Bonds are represented by Ibbotson's Long-term
Corporate Bond Index. T'bills are represented by Ibbotson's Treasury Bill Index
and Inflation is represented by the Cost of Living Index. These are all
unmanaged indices, which can not be invested in directly. While Treasury bills
are insured and offer a fixed rate of return, both the principal and yield of
investment securities will fluctuate with changes in market conditions. Source:
Ibbotson, Roger G., and Rex A. Sinquefiled, Stocks, Bonds, Bill and Inflation
(SBBI), 1989, updated in Stocks, Bonds, Bills and Inflation 1999 Yearbook,
Ibbotson Associates, Chicago. All rights reserved.

  The Trust may use in its advertisement and other materials examples designed
to demonstrate the effect of compounding when an investment is maintained over
several or many years. For example, the following table shows the annual and
total contributions necessary to accumulate $200,000 of savings (assuming a
fixed rate of return) over various periods of time:
<TABLE>
<CAPTION>

      Investment          Annual         Total        Total
      Period           Contribution   Contribution    Saved
      --------------    -----------   ------------   --------
      <S>              <C>            <C>            <C>
           30 Years         $ 1,979       $ 59,370   $200,000
           25 Years         $ 2,955       $ 73,875   $200,000
           20 Years         $ 4,559       $ 91,180   $200,000
           15 Years         $ 7,438       $111,570   $200,000
           10 Years         $13,529       $135,290   $200,000
</TABLE>

This hypothetical example assumes a fixed 7% return compounded annually and a
guaranteed return of principal. The example is intended to show the benefits of
a long-term, regular investment program, and is in no way representative of any
past or future performance of a PIMCO Fund. There can be no guarantee that you
will be able to find an investment that would provide such a return at the times
you invest and an investor in any of the PIMCO Funds should be aware that
certain of the PIMCO Funds have experienced periods of negative growth in the
past and may again in the future.

     The Trust may set forth in its advertisements and other materials
information regarding the relative reliance in recent years on personal savings
for retirement income versus reliance on Social Security benefits and company
sponsored retirement plans. For example, the following table offers such
information for 1997:

               % of Income for Individuals
               Aged 65 Years and Older in 1997*
               --------------------------------

               Social Security
 Year          and Pension Plans  Other
 ----          -----------------  -----

 1997                 43%          57%

     * For individuals with an annual income of at least $51,000.  Other
includes personal savings, earnings and other undisclosed sources of  income.
Source:  Social Security Administration.

     Articles or reports which include information relating to performance,
rankings and other characteristics of the Funds may appear in various national
publications and services including, but not limited to: The Wall Street
Journal, Barron's, Pensions and Investments, Forbes, Smart Money, Mutual Fund
Magazine, The New York Times, Kiplinger's Personal Finance, Fortune, Money
Magazine, Morningstar's Mutual Fund Values, CDA Investment Technologies and The
Donoghue Organization. Some or all of these publications or reports may publish
their own rankings or performance reviews of mutual funds, including the Funds,
and may provide information relating to PIMCO, including descriptions of assets
under management and client base, and opinions of the author(s) regarding the
skills of personnel and employees of PIMCO who have portfolio management
responsibility. From time to

                                       87
<PAGE>

time, the Trust may include references to or reprints of such publications or
reports in its advertisements and other information relating to the Funds.

     From time to time, the Trust may set forth in its advertisements and other
materials information about the growth of a certain dollar-amount invested in
one or more of the Funds over a specified period of time and may use charts and
graphs to display that growth.

     From time to time, the Trust may set forth in its advertisements and other
materials the names of and additional information regarding investment analysts
employed by PIMCO who assist with portfolio management and research activities
on behalf of the Funds.  The following lists various analysts associated with
PIMCO:  Jane Howe, Mark Hudoff, Doris Nakamura and Ray Kennedy.

     Ibbotson Associates ("Ibbotson") has analyzed the risk and returns of the
Funds and relevant benchmark market indexes in a variety of market conditions.
Based on its independent research and analysis, Ibbotson has developed model
portfolios of the Funds and series of PIMCO Funds: Multi-Manager Series ("MMS")
which indicate how, in Ibbotson's opinion, a hypothetical investor with a 5+
year investment horizon might allocate his or her assets among the Funds and
series of MMS.  Ibbotson bases its model portfolios on five levels of investor
risk tolerance which it developed and defines as ranging from "Very
Conservative" (low volatility; emphasis on capital preservation, with some
growth potential) to "Very Aggressive" (high volatility; emphasis on long-term
growth potential).  However, neither Ibbotson nor the Trust offers Ibbotson's
model portfolios as investments.  Moreover, neither the Trust, PIMCO nor
Ibbotson represent or guarantee that investors who allocate their assets
according to Ibbotson's models will achieve their desired investment results.

Voting Rights

     Under the Declaration of Trust, the Trust is not required to hold annual
meetings of Trust shareholders to elect Trustees or for other purposes.  It is
not anticipated that the Trust will hold shareholders' meetings unless required
by law or the Declaration of Trust.  In this regard, the Trust will be required
to hold a meeting to elect Trustees to fill any existing vacancies on the Board
if, at any time, fewer than a majority of the Trustees have been elected by the
shareholders of the Trust.  In addition, the Declaration of Trust provides that
the holders of not less than two-thirds of the outstanding shares of the Trust
may remove a person serving as Trustee either by declaration in writing or at a
meeting called for such purpose.  The Trustees are required to call a meeting
for the purpose of considering the removal of a person serving as Trustee if
requested in writing to do so by the holders of not less than ten percent of the
outstanding shares of the Trust.  In the event that such a request was made, the
Trust has represented that it would assist with any necessary shareholder
communications.  Shareholders of a class of shares have different voting rights
with respect to matters that affect only that class.

     The Trust's shares do not have cumulative voting rights, so that the holder
of more than 50% of the outstanding shares may elect the entire Board of
Trustees, in which case the holders of the remaining

                                       88
<PAGE>

shares would not be able to elect any Trustees.  As of January 25, 2000, the
following persons owned of record or beneficially 5% or more of the noted class
of shares of the following Funds:


<TABLE>
<CAPTION>

                                                                Shares                 Percent
                                                             Beneficially                of
                                                                 Owned                  Class
                                                   ---------------------------------------------

Money Market Fund

Institutional
<S>                                                               <C>                     <C>
Combined Master Retirement Trust                                  184,130,398.880          72.05%   *
5430 LBJ Freeway, Suite 1700
Dallas, Texas  75240

Marin Community Foundation                                         15,359,357.990           6.01%
c/o Norwest Bank
P.O. Box 1533
Minneapolis, Minnesota  55480

California Community Foundation Fund D                             14,437,720.760           5.65%
Attn:  Finance Department
445 S. Figueroa Street, Suite 3400
Los Angeles, California  90071-1638

Administrative
Maltrust & Co.                                                      3,097,163.390          31.75%
225 Essex Street
Salem, Massachusetts  01970

Security Trust for Group Health Cooperative of                      1,655,194.590          16.97%
Puget Sound 403b Group Cust Account
2525 E. Camelback #570
Phoenix, Arizona  85016

Short-Term Fund

Institutional
Soka University of America                                          9,067,001.207          14.36%
26800 W. Mulholland Highway
Attention: Arnold Kawasaki
Calabasas, California  91302

Charles Schwab & Co., Inc. **                                       8,863,685.684          14.04%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104
</TABLE>

                                       89
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
National Gallery of Art                                             6,825,126.977          10.81%
4th & Constitution Avenue, N.W.
Room 605
Washington, D.C.  20565-0001

Bankers Trust Company FBO:                                          4,921,288.823           7.79%
Georgia-Pacific Enhanced Int'l Eqty
648 Grassmere Business Park Rd.
Advisor Services Group, 2nd Floor
Nashville, Tennessee  37211

Trustees of Columbia University in                                  4,478,051.365           7.09%
the City of New York
Office of Investments
475 Riverside Dr., Suite 401
New York, New York  10115

Denison University                                                  3,425,053.568           5.42%
P.O. Box
Granville, Ohio  43023

Administrative
FTC and Company FBO                                                   149,597.552          29.50%
Hunt, Dupree, Rhine
P.O. Box 173736
Denver, Colorado  80217

National Financial Services Corporation**                              89,016.870          17.55%
1 World Financial Center
200 Liberty Street
New York, NY  10281-1003

Lau & Co.                                                              52,852.474          10.42%
c/o Frost National Bank
P. O. Box 2479
San Antonio, Texas  78298-2479

FTC and Company                                                        42,752.183           8.43%
Attn:  DATAlynx K83
P.O. Box 173736
Denver, Colorado  80217

Lynn R. Prebe TTEE of the                                              27,242.067           5.37%
F. James Prebe & Lynn R. Prebe Trust Dtd 7/23/92
16347 Grenoble Lane
Huntington Beach, CA  92649-1825

Class A
MLPF&S For the Sole Benefit of its Customers **                     2,301,403.130          25.77%
</TABLE>

                                       90
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Attention: Fund Administration #97MY2
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Mr. Ronald S. Taft TR                                                 628,234.190           7.03%
Artist Management Inc.
Defined Benefit Pension Plan 61284
18 W. 55th Street, Apt. 4
New York, New York  10019-5368

Mr. Ronald S. Taft TR                                                 484,843.258           5.43%
Ronald S. Taft Employee Defined Benefit Plan 1184
18 W. 55th Street, Apt. 4
New York, New York  10019-5368

Class B
MLPF&S For the Sole Benefit of its Customers **                       186,401.310          37.54%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Donaldson Lufkin Jenrette Securities Corp. Inc.**                      66,010.724          13.29%
P.O. Box 2052
Jersey City, New Jersey  07303-9998

Class C
MLPF&S For the Sole Benefit of its Customers **                       471,539.554          24.30%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                          296,700.830          91.38%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

National Investors Services Corp.                                      21,699.757           6.68%
For Exclusive Benefit of its Customers
Attn.  Ms. Sandra Stewart
55 Water Street, 32nd Floor
New York, NY  10041-3299

Low Duration Fund

Institutional
Charles Schwab & Co., Inc. Rein**                                  41,678,609.860          11.06%
</TABLE>

                                       91
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

MLTC of America FBO                                                25,511,888.171           6.77%
DuPont Savings and Investment Plan
300 Davidson Ave.
Somerset, NJ  08873-4175

Administrative
FIIOC as Agent for Certain Employee Benefits Plan**                 4,088,837.219          32.81%
100 Magellan  KW1C
Covington, Kentucky  41015

McClatchy Newspapers Defined Comp. Inv. Plan                        2,009,387.842          16.12%
550 Kearny Street #600
San Francisco, California  94108

National Financial Services Corporation**                           1,402,839.061          11.26%
1 World Financial Center
200 Liberty Street
New York, NY  10281-1003

Bankers Trust TTEE FBO                                              1,392,635.082          11.17%
Mapco Coal
100 Plaza One
Jersey City, New Jersey  07311-3999

Sonnenschein, Nath & Rosenthal                                      1,231,225.916           9.88%
 P. O. Box 419260
Kansas City, Missouri  64141-6260

Class A
MLPF&S For the Sole Benefit of its Customers **                     5,360,567.825          22.54%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Richard J. Steinhelper Tr                                           2,928,956.726          12.31%
Michigan Tooling Association
Benefit Plans Investment Trust
28237 Orchard Lake Road
P. O. Box 9151
Farmington Hills, Michigan  48333-9151

Class B
MLPF&S For the Sole Benefit of its Customers **                     1,747,460.755          23.65%
Attention: Fund Administration #97M35
</TABLE>

                                       92
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                     2,984,554.835          25.08%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                          855,929.192          85.81%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

Low Duration Fund II

Institutional
Sprint Retirement Savings Plan                                     15,996,057.935          34.76%   *
82 Devonshire Street - E1GA
Boston, Massachusetts  02109

American Bible Society                                              4,896,340.354          10.64%
1865 Broadway
New York, New York  10023

Salt River Project Decom Trust                                      4,585,277.891           9.96%
P. O. Box 52025
Phoenix, Arizona  85072

Associated Electric & Gas                                           3,923,677.336           8.53%
Insurance Services Limited
10 Exchange Place
Jersey City, New Jersey  07302

The Northern Trust Company FBO                                      2,980,675.575           6.48%
Nestle USA Inc. Savings Plan Trust
P.O. Box 92956
Chicago, IL  60675-2956

University of Illinois Foundation                                   2,426,008.659           5.27%
Pooled Short Term Funds
Manager of Accounting & Donor Records
Harker Hall 1305 W. Green Street
Urbana, Illinois  61801
</TABLE>

                                       93
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Administrative
FTC & Co. FBO First Trust Omnibus                                      10,407.327          69.46%
P.O. Box 173736
Denver, CO  80217-3736

National Financial Services Corporation**                               4,576.396          30.54%
1 World Financial Center
200 Liberty Street
New York, NY  10281-1003

Low Duration Fund III

Institutional
Loyola Academy Endowment Fund                                       1,029,717.849          36.97%   *
135 S. LaSalle Street
P. O. Box 1443
Chicago, Illinois  60690

Sisters of St. Joseph/Michigan                                        585,641.213          30.83%
3427 Gull Road
P. O. Box 13
Nazareth, Michigan  49074

National Jewish Medical & Research Center                             521,276.552          18.72%
1400 Jackson Street
Denver, CO  80206-2762

Charles Schwab & Co., Inc. Rein**                                     354,721.558          12.74%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

Low Duration Mortgage Fund

Institutional
Pacific Investment Management Company                                 386,048.924          90.08%   *
840 Newport Center Drive
Newport Beach, California  92660

Charles Schwab & Co., Inc. Rein**                                      42,528.510           9.92%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104
</TABLE>

                                       94
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Moderate Duration Fund

Institutional
Columbus Circle Trust Co-SV**                                       6,112,290.590          16.37%
1 Station Place Metro Center
Stamford, Connecticut  06902

Northern Trust Bank of Texas Custodian for                          3,129,441.067           8.38%
John G. and Marie Stella Kenedy Memorial Foundation
P.O. Box 02056
Chicago, IL  60675

Lakeland Regional Medical Center                                    2,544,994.051           6.82%
c/o Wendel & Co.
One Wall Street, 6th Floor
P.O. Box 1066, Wall Street Station
New York, NY  10286

The Children's Hospital Association                                 2,333,860.261           6.25%
1056 E. 19th Avenue B020
Denver, Colorado  80218

Memorial Hospital of South Bend, Inc.                               2,106,839.531           5.64%
615 N. Michigan Street
South Bend, Indiana  46601

Samaritan Health System Retirement Income Plan                      1,976,704.350           5.29%
300 S. Grand Ave. 40th Floor
Los Angeles, California  90071

Bay State Health System Inc.                                        1,918,581.428           5.14%
c/o Bost & Co.
P.O. Box 3198
Pittsburgh, Pennsylvania  15230

Real Return Bond Fund

Institutional
National Financial Services Corporation **                          4,252,014.643          28.51%
1 World Financial Center
200  Liberty Street
New York, New York 10281

Charles Schwab & Co., Inc. Rein**                                   3,445,804.100          23.10%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104
</TABLE>

                                       95
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Schroder Wertheim & Co., Inc.                                       1,962,817.900          13.16%
Mutual Fund Control Account
c/o Lewco Securities
34 Exchange Place 4th Fl
Jersey City, New Jersey  07311

Wake Forest University                                              1,531,301.490          10.27%
P.O. Box 7354
Winston Salem, NC  27109-7354

McKinsey & Co. Inc. Profit Sharing Ret Plan Trust                   1,235,721.703           8.29%
485 Madison Avenue, 21st Floor
New York, New York  10022

Hampton University                                                  1,042,752.868           6.99%
1 Tyler Street
Hampton, Virginia  23668

Class A
Lewco Securities Corp. FBO                                            624,768.534          44.29%
A/C# H30-627865-6-01
34 Exchange Place, 4th Floor
Jersey City, New Jersey  07311

MLPF&S For the Sole Benefit of its Customers **                       484,376.606          34.34%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class B
MLPF&S For the Sole Benefit of its Customers **                       343,928.678          33.85%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                       726,249.245          51.38%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                          472,469.051          45.91%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122
</TABLE>

                                       96
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Total Return Fund

Institutional
Charles Schwab & Co., Inc.**                                      178,581,759.925           7.45%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

Administrative
Nikko Securities Co., Ltd.**                                       91,443,186.000          29.26%
3-1 Marunouchi 3Chrome, Chiyodaku
Tokyo, Japan  101-0064

National Financial Services Corporation **                         54,609,994.426          17.47%
1 World Financial Center
200  Liberty Street
New York, New York 10281

FIIOC as Agent for Certain Employee Benefits Plan**                53,317,901.923          17.06%
100 Magellan KW1C
Covington, Kentucky  41015

Manufacturers Life Insurance Co. (USA)                             25,543,796.129           8.17%
200 Bloor Street East
Toronto, Ontario
Canada M4W 1E5

Class A
MLPF&S For the Sole Benefit of its Customers **                    89,364,717.286          50.31%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class B
MLPF&S For the Sole Benefit of its Customers **                    23,524,567.109          35.18%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                    23,138,749.339          30.78%
Attention: Fund Administration
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484
</TABLE>

                                       97
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Class D
Charles Schwab & Co., Inc. Rein**                                   6,033,020.923          87.49%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

Total Return Fund II

Institutional
Catholic Archbishop of Chicago                                      9,957,209.770           8.37%
155 East Superior Street
Chicago, IL  60611-2911

Charles Schwab & Co., Inc. Rein**                                   8,070,574.275           6.78%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

IUE AFL-CIO Pension Plan                                            6,965,537.470           5.85%
1460 Broad Street
Blommfield, New Jersey  07003

Morley Capital Management                                           6,235,952.780           5.24%
P.O. Box 85484
San Diego, CA  92186

Administrative
Security Trust Co. as Inv. Agent for                                3,034,513.838          58.95%
Twin City Pipe Trades Supply
Retirement Plan
2525 E. Camelback Road, #570
Phoenix, AZ  85016-4272

National Financial Services Corporation **                            550,999.190          10.70%
1 World Financial Center
200  Liberty Street
New York, New York 10281

Total Return Fund III

Institutional
Archdiocese of LA/Corp/Diocese Tucson                              11,694,500.431          17.19%
3424 Wilshire Boulevard, 10th Floor
Los Angeles, California  90010-2241

Diocese of Orange                                                   6,784,382.883           9.97%
c/o The Bank of New York
P.O. Box 1066, Wall Street Station
New York, NY  10268-1066
</TABLE>

                                       98
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Sparrow Health System Pension                                       3,972,269.265           5.84%
c/o Mac & Co.
P.O. Box 3198
Pittsburgh, Pennsylvania  15230-3198

Administrative
Lumpkin Foundation (PaineWebber)                                      419,194.267          88.35%
P. O. Box 1097
Mattoon, Illinois  61938

Dubuque Bank & Trust Co. **                                            34,530.503           7.28%
Attention:  Trust Department
P.O. Box 747
Dubuque, Iowa  52004

Total Return Mortgage Fund

Institutional
Pacific Investment Management Company                                 384,143.593          96.73%   *
840 Newport Center Drive
Newport Beach, California  92660

Class D
National Investors Services Corp.                                       3,058.212          42.67%
for Exclusive Benefit of their Customers
55 Water Street, 32nd Floor
New York, NY  10041

Charles Schwab & Co., Inc.**                                            3,019.794          42.13%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

Pacific Investment Management Company                                   1,089.250          15.20%
840 Newport Center Drive
Newport Beach, California  92660

High Yield Fund

Institutional
Charles Schwab & Co., Inc. Rein**                                  28,340,336.194          13.60%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104
</TABLE>

                                       99
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Bell Atlantic                                                      10,980,973.233           5.27%
c/o Bost & Co.
P.O. Box 3198
Pittsburgh, Pennsylvania  15230-3198

Administrative
National Financial Services Corporation **                         25,067,121.660          79.40%
1 World Financial Center
200 Liberty Street
New York, New York 10281

Centurion Trust Company FBO                                         2,970,970.150           9.41%
Omnibus/Centurion Capital Management
2425 EB Camelback Road, Suite 530
Phoenix, AZ  85016

FIIOC as Agent for Certain Employee Benefits Plan**                 2,416,868.949           7.66%
100 Magellan KW1C
Covington, Kentucky  41015

Class A
MLPF&S For the Sole Benefit of its Customers **                     3,227,501.173          16.89%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class B
MLPF&S For the Sole Benefit of its Customers **                     7,658,806.580          25.37%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                     6,058,000.024          17.00%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                        1,831,008.771          86.80%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122
</TABLE>

                                      100
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>

Long-Term U.S. Government Fund

Institutional
The St. Joe Company Salaried Pension Plan                           5,418,326.601          25.04%
1650 Prudential Drive, Suite 400
Jacksonville, Florida  32207

Chicago Symphony Orchestra                                          3,493,875.607          16.15%
220 South Michigan Avenue
Chicago, Illinois  60604

Charles Schwab & Co. Inc.                                           3,142,686.173          14.53%
Reinvest Account
Attn:  Mutual Funds Dept.
101 Montgomery Street
San Francisco, CA  94104-4122

The St. Joe Company Hourly Pension Plan                             1,823,000.283           8.43%
1650 Prudential Drive, Suite 400
Jacksonville, Florida  32207

Allianz Defined Contribution Plan                                   1,454,263.246           6.72%
P. O. Box 92956
Chicago, Illinois  60675

FTC & Co. Attn:  Datalynx House Account                             1,322,886.248           6.11%
P.O. Box 173736
Denver, Colorado  80217

Administrative
FIIOC as Agent for Certain Employee Benefits Plan**                 4,125,931.906          92.53%
100 Magellan  KW1C
Covington, Kentucky  41015

Class A
Advest Inc.                                                           600,120.953          13.77%
90 State House Square
Hartford, Connecticut  06103

MLPF&S For the Sole Benefit of its Customers **                       331,983.242           7.62%
Attention: Fund Administration #97MY2
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484
</TABLE>

                                      101
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Prudential Bank & Trust Co.                                           324,456.877           7.45%
Defined Contribution Plan
For the Benefit of Plan Participants
30 Scranton Office Park
Scranton, Pennsylvania  18507-1755

Class B
MLPF&S For the Sole Benefit of its Customers **                     1,136,533.339          30.76%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                       569,088.288          24.83%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Short Duration Municipal Income

Institutional
PIMCO Advisors L.P.                                                 1,064,006.081         100.00%   *
800 Newport Center Drive, 6th Floor
Newport Beach, California  92660-6309

Municipal Bond

Institutional
Brent R. Harris & Elizabeth E. Harris JT WROS                         154,802.234          27.07%
c/o 800 Newport Center Drive
Newport Beach, CA  92660

MediaOne VEBA Trust                                                   119,302.567          20.86%
188 Inverness Drive West, Fl. 7
Englewood, CO  80112-5201

Charles Schwab & Co. Inc.                                              79,304.878          13.87%
Reinvest Account
Attn:  Mutual Funds Dept.
101 Montgomery Street
San Francisco, CA  94104-4122

Phyllis K. Curtis TTEE of                                              75,466.607          13.20%
The Phyllis K. Curtis Separate Property Trust
14158 NW Bronson Creek Drive
Portland, OR  97229-7060
</TABLE>

                                      102
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>

John L. Johnson                                                        48,031.177           8.40%
7831 Stanford
Dallas, TX  75225-8209

Nelly B. Monroe                                                        36,406.515           6.37%
57 Long Hill Farm
Guilford, CT  06437-1827

Administrative
Joy L. McNeese                                                         29,424.879          10.54%
8438 Porter Lane
Alexandria, VA  22308-2142

Class A
MLPF&S For the Sole Benefit of its Customers **                       368,751.515          36.96%
Attention: Fund Administration #97M
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Sitar Limited Partnership                                             101,493.521          10.17%
4800 Ira Avenue
Cleveland, Ohio  44144

Banc of America Securities LLC                                         87,713.411           8.79%
712-02020-10
Attn:  Mutual Funds - 4th Floor
600 Montgomery Street
San Francisco, CA  94111

DB Alex Brown Incorporated                                             51,776.576           5.19%
FBO 255-29889-13
P.O. Box 1346
Baltimore, MD  21203

Class B
MLPF&S For the Sole Benefit of its Customers **                       195,791.683          31.28%
Attention: Fund Administration #97M
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Dain Rauscher Incorporated FBO                                         66,529.644          10.63%
K. K. Kinsey Trustee
K. K. Kinsey Rev Intervivos TR
UA DTD 04-18-1997
2801 NE 14th Street
Fort Lauderdale, FL  33304-1680
</TABLE>

                                      103
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>

Class C
MLPF&S For the Sole Benefit of its Customers **                       354,925.714          11.16%
Attention: Fund Administration #97M
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                           48,108.257          73.84%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

Gary P. Hynes                                                           8,537.887          13.10%
1018 Sheridan Road
Evanston, Illinois  60202

California Intermediate Municipal Bond

Institutional
PIMCO Advisors L.P.                                                   303,748.240          72.86%   *
800 Newport Center Drive, 6th Floor
Newport Beach, California  92660-6309

Chris P. Dialynas                                                      58,347.005          14.00%
2140 Mesa Drive
Newport Beach, California  92660

Donaldson Lufkin Jenrette Securities Corp. Inc.**                      38,896.798           9.33%
P.O. Box 2052
Jersey City, New Jersey  07303-2052

Class A
Bear Stearns Securities Corp.                                          25,198.286          44.38%
FBO 709-93145-23
1 MetroTech Center North
Brooklyn, New York  11201-3859

Bear Stearns Securities Corp.                                          12,518.484          22.05%
FBO 709-93193-16
1 MetroTech Center North
Brooklyn, New York  11201-3859

Donaldson Lufkin Jenrette Securities Corp. Inc.**                      12,036.108          21.20%
P.O. Box 2052
Jersey City, New Jersey  07303-9998
</TABLE>

                                      104
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Robert B. Kuppenheimer                                                  4,056.795           7.14%
19900 MacArthur Blvd., Suite 500
Irvine, California  92612

New York Intermediate Municipal Bond

Institutional
PIMCO Advisors L.P.                                                   304,375.897         100.00%   *
800 Newport Center Drive, 6th Floor
Newport Beach, California  92660-6309

Class A
PIMCO Advisors L.P.                                                     1,019.088         100.00%
800 Newport Center Drive, 6th Floor
Newport Beach, California  92660-6309

Global Bond

Institutional
Blue Cross Blue Shield of Massachusetts Inc.                        4,525,056.362          14.74%
Managed Care
100 Summer Street, Treasury 01-06
Boston, MA  02110-2106

Walker Art Center, Inc.                                             3,151,868.294          10.27%
Vineland Place
Minneapolis, Minnesota  55403

University of Denver (Colorado Seminary)                            2,435,522.690           7.93%
2199 South University Blvd.
Denver, Colorado  80208

Kamehameha Schools                                                  2,355,738.775           7.67%
c/o The Bank of New York
P.O. Box 1066 Wall Street Station
New York, New York  10268

Worcester Polytechnic                                               1,638,334.726           5.34%
100 Institute Road
Worcester, Massachusetts  01609

Hobart and William Smith Colleges                                   1,613,078.591           5.25%
337 Pulteney Street
Geneva, New York  14456
</TABLE>

                                      105
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Administrative
FIIOC as Agent for Certain Employee Benefits Plan**                   269,411.103          98.83%
100 Magellan KW1C
Covington, Kentucky  41015

Global Bond Fund II

Institutional
Citibank (Switzerland) Acting as Agent                              2,151,513.195          27.94%
Attn:  Securities Support Group Fund
Seestrasse 25
P.O. Box 3760
8021 Zurich, Switzerland

Weil Gotshal & Manges                                               1,908,376.798          24.78%
Partners Pension Trust
c/o The Citibank Private Bank
120 Broadway, 2nd Floor
New York, New York  10271

Canterbury/Uniform Code Council                                     1,743,416.302          22.64%
c/o MAC & Co.
P.O. Box 3198
Pittsburgh, PA  15230-3198

GMP & Employers Retiree Trust                                       1,078,303.624          14.00%
c/o Mellon Bank N.A.
P.O. Box 3198
Pittsburgh, Pennsylvania  15230-3198

Weil Gotshal & Manges                                                 573,123.662           7.44%
Employees Pension Trust
c/o The Citibank Private Bank
120 Broadway, 2nd Floor
New York, New York  10271

Class A
MLPF&S For the Sole Benefit of its Customers **                        42,946.017          15.16%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Salomon Smith Barney Inc.                                              15,140.819           5.34%
157657431
333 West 34th Street, 3rd Floor
New York, New York  10001
</TABLE>

                                      106
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Class B
MLPF&S For the Sole Benefit of its Customers **                        94,287.101          18.39%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                        87,596.761          14.69%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Foreign Bond Fund

Institutional
Charles Schwab & Co., Inc. Rein**                                  24,611,699.833          58.99%   *
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

Donaldson Lufkin Jenrette Securities Corp. Inc.**                   6,110,108.404          14.65%
P. O. Box 2052
Jersey City, New Jersey  07399

Administrative
CBNA FBO Clients of Benefit Plans                                     139,720.026          29.60%
1500 Genesee  Street
Utica, New York  13502

National Financial Services Corporation **                             62,514.924          13.25%
1 World Financial Center
200  Liberty Street
New York, New York 10281

Resources Trust Company for                                            52,430.248          11.11%
the Exclusive Benefit of the Customers of IMS
P.O. Box 3865
Englewood, CO  80155

Class A
Advest Inc.                                                           698,781.176          12.91%
768-12284-12
90 State House Square
Hartford, CT  06103

Advest Inc.                                                           487,616.814           9.01%
768-12284-11
90 State House Square
Hartford, CT  06103
</TABLE>

                                      107
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
David P. Lanoha                                                       401,203.611           7.41%
5250 E. Arapahoe Road
#F7, Suite 303
Littleton, Colorado  80122

MLPF&S For the Sole Benefit of its Customers **                       281,236.639           5.20%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class B
MLPF&S For the Sole Benefit of its Customers **                       177,223.106           7.32%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                          797,277.353          87.75%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

Sandra Stewart                                                         48,967.808           5.39%
c/o National Investors Services Corp.
55 Water Street, 32nd Floor
New York, New York  10041

Emerging Markets Bond Fund

Institutional
State Street Bank & Trust FBO                                         534,487.129          37.34%
Hallmark Master Trust
Master Trust Services Division
P.O. Box 1992
Boston, Massachusetts  02105-1992

Tenet Healthcare (AMI)                                                521,743.130          36.45%
14001 Dallas Pkwy., Suite 105
Dallas, Texas  75240-4362

Arrow & Co.                                                           242,718.447          16.95%
P.O. Box 30010
Durham, North Carolina  27702
</TABLE>

                                      108
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Charles Schwab & Co., Inc. Rein**                                      84,479.748           5.90%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

Administrative
Centurion Trust Company                                             1,671,197.883          99.91%   *
FBO Omnibus/Centurion Cap. Mgmt.
2425 EB Camelback Road, Suite 530
Phoenix, AZ  85016

Class A
MLPF&S For the Sole Benefit of its Customers **                         4,869.000          15.56%
Attention: Fund Administration #97RD2
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Steve M. Foulke & Maria M. Foulke                                       4,714.724          15.07%
Community Property
1 Altimira
Coto de Caza, California  92679-4901

PaineWebber for the Benefit of L.A. Razette &                           3,591.016          11.48%
Clara M. Razette JTWROS
3357 Sabal Springs Blvd.
North Fort Myers, Florida  33917-2023

Julie D. Roth TR                                                        3,529.057          11.28%
UA JUN 06 96
J&M Roth Family Trust
34300 Lantern Bay Drive, Apt. 9
Dana Point, California  92629-2858

Maria May Faulke TTEE                                                   3,119.826           9.97%
Maria Michelle May 1992 Trust
FBO Chelsea & Ryan Faulke
1 Altimira
Trabuco Canyon, California  92679

Class B
MLPF&S For the Sole Benefit of its Customers **                        26,931.344          21.82%
Attention: Fund Administration #97M36                                           .
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Robert S. Baird & Co. Inc.                                             13,744.475          11.13%
A/C 1751-2072
777 East Wisconsin Avenue
Milwaukee, WI  53202-5391
</TABLE>

                                      109
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Donaldson Lufkin Jenrette Securities Corp. Inc. **                      9,053.567           7.33%
P.O. Box 2052
Jersey City, New Jersey  07303-9998

Rosaylin Helford                                                        6,234.466           5.05%
1655 Lake Cook Road, Apt. 149
Highland Park, Illinois  60035

Class C
MLPF&S For the Sole Benefit of its Customers **                         7,748.520          22.78%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

NFSC FEBO #120-077852                                                   5,668.276          16.66%
FMT CO CUST IRA
FBO John J. Jordan
P. O. Box 466
Rye Beach, New Hampshire  03871

CIBC World Markets Corp.                                                4,176.072          12.28%
FBO 020-66126-24
P. O. Box 3484
Church Street Station
New York, New York  10008-8484

Orlin TE SLAA TR                                                        3,783.557          11.12%
Patrick J. Rowland Rev Trust
U/A Dated 12/7/1993 as Amended
3800 W. 80th Street
Bloomington, Minnesota  55431-4420

Raymond James & Assoc. Inc.                                             3,489.592          10.26%
For Elite Acct #82729810
Janet A. Delsantro
REV Trust UA DTD 3 23 98
14505 Aeries Way Drive, Apt. 224
Fort Meyers, Florida  33912-1721

Strategic Balanced Fund

Institutional
California Community Foundation                                     5,436,805.743          55.76%   *
606 South Olive Street, Suite 2400
Los Angeles, California  90014
</TABLE>

                                      110
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>

Carpenters Health and Security Trust                                2,301,518.203          23.60%
of Western Washington
P.O. Box 1929
Seattle, Washington  98111

Dominguez Services Corporation                                        529,711.681           5.43%
Trusteed Pension Fund
21718 South Alameda Street
Long Beach, California 90810-1682

Administrative
Affiliated Medical Centers Profit Sharing Plan                         32,656.121          66.15%
c/o Norwest Bank
P.O. Box 1533
Minneapolis, Minnesota  55480-1533

Affiliated Medical Center Pension Plan                                 15,890.216          32.19%
c/o Norwest Bank
P.O. Box 1533
Minneapolis, Minnesota  55480-1533

Class A
Prudential Securities Inc. FBO                                         37,609.042          10.38%
Prudential Retirement Services
Administrator for Plan 80322
MSSA-ILA Local 1985 401(k)
P.O. Box 15040
New Brunswick, NJ  08906

B. B. Schilberg & N. B. Schilberg TR UA 10/01/93                       31,933.433           8.81%
 Schilbert Integrated Metals Corp. 401(k) Plan
Riverview Square II
99 E River Drive
East Hartford, CT  06108

BSDT Cust. Rollover IRA                                                23,531.683           6.49%
FBO Frederick A. Otto
795 Fairway Court
Gaylord, MI  49735

Class B
MLPF&S For the Sole Benefit of its Customers **                       191,595.913          19.66%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484
</TABLE>

                                      111
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>

Class C
MLPF&S For the Sole Benefit of its Customers **                       188,640.641          18.70%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                            8,167.868          63.97%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122

National Investors Services Corp. for                                   3,308.175          25.91%
Exclusive Benefit of their Customers
55 Water Street, 32nd Floor
New York, NY  10041

PIMCO Advisors L.P.                                                       960.617           7.52%
800 Newport Center Drive
Newport Beach, California  92660-6309

Convertible

Institutional
State Street Bank & Trust                                           1,166,165.646          12.14%
FBO:  Pacific Gas & Electric Co.
Retirement Plan Master
1 Enterprise Drive
North Quincy, Massachusetts  02171-2126

Northern Trust Company FBO:                                           884,409.050           9.21%
Lucent Technologies Inc. Master Pension Trust
P.O. Box 92923
Chicago, IL  60675

State Street Bank & Trust Co. FBO:                                    696,564.497           7.25%
New York State Teamster Conference
Pension and Retirement Plan
P.O. Box 1992
Boston, Massachusetts  02105

Bankers Trust Co. FBO GTE Services Corp.                              560,011.101           5.83%
Bond Pension  Fund
c/o BT Services Tennessee Inc.
648 Grassmere Business Park Road
Nashville, Tennessee  37211
</TABLE>

                                      112
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Class A
Dean Witter for the Benefit of                                        158,213.039          67.51%
American Osteopathic Association
P.O. Box 250, Church Street Station
New York, New York  10008-0250

MLPF&S For the Sole Benefit of its Customers **                        23,417.785           9.99%
Attention: Fund Administration #97
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class B
MLPF&S For the Sole Benefit of its Customers **                        56,880.770          70.62%
Attention: Fund Administration #97
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Prudential Securities Inc. FBO                                          4,479.054           5.56%
Mr. Larry R. Kirkman
2310 Whilden Ct.
Charlotte, NC  28211-3274

Class C
MLPF&S For the Sole Benefit of its Customers **                       126,666.790          39.04%
Attention: Fund Administration #97
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

StocksPLUS Fund

Institutional
Charles Schwab & Co., Inc. Rein**                                   5,294,526.544          11.89%
The Schwab Building
101 Montgomery Street
San Francisco, California  94104

St. Cloud Hospital                                                  3,937,176.964           8.84%
1406 6th Avenue N.
St. Cloud, Minnesota  56301

Northern Trust Custodian FBO                                        3,038,147.185           6.82%
Reliastar Financial Acct. #26-48847
P.O. Box 92956
Chicago, IL  60675
</TABLE>

                                      113
<PAGE>

<TABLE>
<S>                                                                 <C>                   <C>
Firstar Trust Company Agent                                         2,567,251.321           5.77%
Firstar Des Moines TTEE
Iowa Methodist Medical Center
P.O. Box 1787
Milwaukee, Wisconsin  53201

Administrative
Centurion Trust Company                                             1,588,287.090          47.76%
FBO Omnibus/Centurion Cap. Mgmt.
2425 EB Camelback Road, Suite 530
Phoenix, AZ  85016

The Colorado County Officials and Employees                         1,275,759.623          38.36%
Retirement Association
Attn:  Jay Shoemaker
4949 S. Syracuse Street, Suite 400
Denver, Colorado  80237-2747

Class A
MLPF&S For the Sole Benefit of its Customers **                     1,550,625.561          12.11%
Attention: Fund Administration #97M34
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

FTC & Co.                                                             655,611.744           5.12%
Attn:  Datalynx #179
P.O. Box 173736
Denver, Colorado  80217

Class B
MLPF&S For the Sole Benefit of its Customers **                     4,512,192.603          16.16%
Attention: Fund Administration #97M35
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class C
MLPF&S For the Sole Benefit of its Customers **                     3,867,979.750          15.82%
Attention: Fund Administration #97M36
4800 Deer Lake Drive E. Floor 3
Jacksonville, Florida 32246-6484

Class D
Charles Schwab & Co., Inc.**                                          193,577.650          68.95%
Special Custody Accounts
FBO Customers
Attention: Mutual Funds
101 Montgomery Street
San Francisco, California  94104-4122
</TABLE>

                                      114
<PAGE>

*  Entity owned 25% or more of the outstanding shares of beneficial interest of
the Fund, and therefore may be presumed to "control" the Funds, as that term is
defined in the 1940 Act.

**  Shares are believed to be held only as nominee.

The Reorganization of the PIMCO Money Market and Total Return II Funds

     On November 1, 1995, the Money Market Fund and the PIMCO Managed Bond and
Income Fund, two former series of PIMCO Funds:  Equity Advisors Series, were
reorganized as series of the Trust, and were renamed Money Market Fund and Total
Return Fund II, respectively.  All information presented for these Funds prior
to this date represents their operational history as series of PIMCO Funds:
Equity Advisors Series.  In connection with the Reorganization, the Funds
changed their fiscal year end from October 31 to March 31.

The Reorganization of the PIMCO Global Bond Fund II

     On January 17, 1997, the Global Income Fund, a former series of PIMCO
Advisors Funds, was reorganized as a series of the Trust, and was renamed the
Global Bond Fund II.  All information presented for this Fund prior to  that
date represents its operational history as a series of PIMCO Advisors Funds.  In
connection with the Reorganization, the Fund changed its fiscal year end from
September 30 to March 31.

Code of Ethics

     The Trust and PIMCO have each adopted a Code of Ethics governing personal
trading activities of all Trustees and officers of the Trust, and Directors,
officers and employees of PIMCO who, in connection with their regular functions,
play a role in the recommendation of any purchase or sale of a security by the
Trust or obtain information pertaining to such purchase or sale or who have the
power to influence the management or policies of the Trust or PIMCO.  Such
persons are prohibited from effecting certain transactions, allowed to effect
certain exempt transactions, required to preclear certain security transactions
with PIMCO's Compliance Officer or his designee and to report certain
transactions on a regular basis.  PIMCO has developed procedures for
administration of the Codes.

Custodian, Transfer Agent and Dividend Disbursing Agent

     State Street Bank and Trust Company ("State Street"), 801 Pennsylvania,
Kansas City, Missouri 64105 serves as custodian for assets of all Funds.  Under
the custody agreement, State Street may hold the foreign securities at its
principal office at 225 Franklin Street, Boston. Massachusetts 02110, and at
State Street's branches, and subject to approval by the Board of Trustees, at a
foreign branch of a qualified U.S. bank, with an eligible foreign subcustodian,
or with an eligible foreign securities depository.

     Pursuant to rules adopted under the 1940 Act, the Trust may maintain
foreign securities and cash in the custody of certain eligible foreign banks and
securities depositories.  Selection of these foreign custodial institutions is
made by the Board of Trustees following a consideration of a number of factors,
including (but not limited to) the reliability and financial stability of the
institution; the ability of the institution to perform capably custodial
services for the Trust; the reputation of the institution in its national
market; the political and economic stability of the country in which the
institution is located; and further risks of potential nationalization or
expropriation of Trust assets.  The Board of Trustees reviews annually the
continuance of foreign custodial arrangements for the Trust.  No assurance can
be given that the Trustees' appraisal of the risks in connection with foreign
custodial arrangements will always be correct or that expropriation,
nationalization, freezes, or confiscation of assets that would impact assets of
the Funds will not occur, and shareholders bear the risk of losses arising from
these or other events.

                                      115
<PAGE>

     National Financial Data Services, 330 W. 9th Street, 4th Floor, Kansas
City, Missouri serves as transfer agent and dividend disbursing agent for the
Institutional Class, Administrative Class, J Class and K Class shares of the
Funds.  PFPC Inc., P.O. Box 9688, Providence, Rhode Island 02940-9688 serves as
transfer agent and dividend disbursing agent for the Class A, Class B, Class C
and Class D shares of the Funds.

Independent Accountants

     PricewaterhouseCoopers LLP, 1055 Broadway, Kansas City, MO  64105, serves
as independent public accountants for all Funds.  PricewaterhouseCoopers LLP
provides audit services, tax return preparation and assistance and consultation
in connection with review of SEC filings.  Prior to November 1, 1995, Deloitte &
Touche LLP served as independent accountants for the Money Market and Total
Return II Funds.  See "The Reorganization of the PIMCO Money Market and Total
Return II Funds" for additional information.

Counsel

     Dechert Price & Rhoads, 1775 Eye Street, N.W., Washington, D.C. 20006,
passes upon certain legal matters in connection with the shares offered by the
Trust, and also act as counsel to the Trust.

Registration Statement

     This Statement of Additional Information and the Prospectuses do not
contain all of the information included in the Trust's registration statement
filed with the SEC under the 1933 Act with respect to the securities offered
hereby, certain portions of which have been omitted pursuant to the rules and
regulations of the SEC.  The registration statement, including the exhibits
filed therewith, may be examined at the offices of the SEC in Washington, D.C.

     Statements contained herein and in the Prospectuses as to the contents of
any contract or other documents referred to are not necessarily complete, and,
in each instance, reference is made to the copy of such contract or other
documents filed as an exhibit to the registration statement, each such statement
being qualified in all respects by such reference.

Financial Statements

     Financial statements for the Trust as of March 31, 1999 for its fiscal year
then ended, including notes thereto, and the reports of PricewaterhouseCoopers
LLP thereon dated May 19, 1999, are incorporated by reference from the Trust's
1999 Annual Reports.  A copy of the Reports delivered with this Statement of
Additional Information should be retained for future reference.

                                      116
<PAGE>

PIMCO Funds Shareholders' Guide
   for Class A, B and C Shares

April 3, 2000

This Guide relates to the mutual funds (each, a "Fund") that are series of PIMCO
Funds: Multi-Manager Series (the "MMS Trust") and PIMCO Funds: Pacific
Investment Management Series (the "PIMS Trust" and, together with the MMS Trust,
the "Trusts").  Unless otherwise indicated, references to the Funds include the
PIMCO Funds Asset Allocation Series portfolios (the "Portfolios").  The
Portfolios are so called "funds of funds" which are series of the MMS Trust.
Class A, B and C shares of the MMS Trust, the PIMS Trust and the Portfolios are
offered through four separate prospectuses (each, a "Retail Prospectus").

This Guide contains detailed information about Fund purchase, redemption and
exchange options and procedures and other information about the Funds.  This
Guide is not a prospectus, and should be used in conjunction with the applicable
Retail Prospectus.  This Guide, and the information disclosed herein, is
incorporated by reference in, and considered part of, the Statement of
Additional Information corresponding to each Retail Prospectus.

PIMCO Funds Distributors LLC distributes the Funds' shares.  You can call PIMCO
Funds Distributors LLC at 1-800-426-0107 to find out more about the Funds and
other funds in the PIMCO Funds family.  You can also visit our Web site at
www.pimcofunds.com.
<PAGE>

TABLE OF CONTENTS

<TABLE>
<S>                                                                        <C>
How to Buy Shares........................................................   SG-3
Alternative Purchase Arrangements........................................   SG-8
Exchange Privilege.......................................................  SG-22
How to Redeem............................................................  SG-23
</TABLE>

                                      SG-2
<PAGE>

How to Buy Shares

     Class A, Class B and Class C shares of each Fund are continuously offered
through the Trusts' principal underwriter, PIMCO Funds Distributors LLC (the
"Distributor") and through other firms which have dealer agreements with the
Distributor ("participating brokers") or which have agreed to act as introducing
brokers for the Distributor ("introducing brokers"). The Distributor is a wholly
owned subsidiary of PIMCO Advisors L.P. ("PIMCO Advisors"), the investment
adviser to the Funds that are series of the MMS Trust, and an affiliate of
Pacific Investment Management Company ("Pacific Investment Management Company"),
the investment adviser to the Funds that are series of the PIMS Trust. PIMCO
Advisors and Pacific Investment Management Company are each referred to herein
as an "Adviser."

     There are two ways to purchase Class A, Class B or Class C shares: either
(i) through your dealer or broker which has a dealer agreement with the
Distributor or (ii) directly by mailing a PIMCO Funds account application (an
"account application") with payment, as described below under the heading
Direct Investment, to the Distributor (if no dealer is named in the account
application, the Distributor may act as dealer).  Class A, Class B and Class C
shares of the Short Duration Municipal Income Fund and Class B and Class C
shares of the  California Intermediate Municipal Bond and New York Intermediate
Municipal Bond Funds are not offered as of the date of this Guide; however,
investment opportunities in these Funds may be available in the future.

     Shares may be purchased at a price equal to their net asset value per share
next determined after receipt of an order, plus a sales charge which, at the
election of the purchaser, may be imposed either (i) at the time of the purchase
in the case of Class A shares (the "initial sales charge alternative"), (ii) on
a contingent deferred basis in the case of Class B shares (the "deferred sales
charge alternative") or (iii) by the deduction of an ongoing asset based sales
charge in the case of Class C shares (the "asset based sales charge
alternative"). In certain circumstances, Class A and Class C shares are also
subject to a Contingent Deferred Sales Charge ("CDSC"). See "Alternative
Purchase Arrangements." Purchase payments for Class B and Class C shares are
fully invested at the net asset value next determined after acceptance of the
trade. Purchase payments for Class A shares, less the applicable sales charge,
are invested at the net asset value next determined after acceptance of the
trade.

     All purchase orders received by the Distributor prior to the close of
regular trading (normally 4:00 p.m., Eastern time) on the New York Stock
Exchange on a regular business day are processed at that day's offering price.
However, orders received by the Distributor from dealers or brokers after the
offering price is determined that day will receive such offering price if the
orders were received by the dealer or broker from its customer prior to such
determination and were transmitted to and received by the Distributor prior to
its close of business that day (normally 5:00 p.m., Eastern time) or, in the
case of certain retirement plans, received by the Distributor prior to 9:30
a.m., Eastern time on the next business day. Purchase orders received on other
than a regular business day will be executed on the next succeeding regular
business day. The Distributor, in its sole discretion, may accept or reject any
order for purchase of Fund shares. The sale of shares will be suspended during
any period in which the New York Stock Exchange is closed for other than
weekends or holidays, or, if permitted by

                                      SG-3
<PAGE>

the rules of the Securities and Exchange Commission, when trading on the New
York Stock Exchange is restricted or during an emergency which makes it
impracticable for the Funds to dispose of their securities or to determine
fairly the value of their net assets, or during any other period as permitted by
the Securities and Exchange Commission for the protection of investors.

     Except for purchases through the PIMCO Funds Auto-Invest plan, the PIMCO
Funds Auto-Exchange plan, investments pursuant to the Uniform Gifts to Minors
Act, and tax-qualified and wrap programs referred to below under "Tax-Qualified
Retirement Plans" and "Alternative Purchase Arrangements--Sales at Net Asset
Value," the minimum initial investment in Class A, Class B or Class C shares of
any Fund is $2,500, and the minimum additional investment is $100 per Fund. For
information about dealer commissions, see "Alternative Purchase Arrangements"
below. Persons selling Fund shares may receive different compensation for
selling Class A, Class B or Class C shares. Normally, Fund shares purchased
through participating brokers are held in the investor's account with that
broker. No share certificates will be issued unless specifically requested in
writing by an investor or broker-dealer.

Direct Investment

     Investors who wish to invest in Class A, Class B or Class C shares of a
Fund directly, rather than through a participating broker, may do so by opening
an account with the Distributor. To open an account, an investor should complete
the account application. All shareholders who open direct accounts with the
Distributor will receive from the Distributor individual confirmations of each
purchase, redemption, dividend reinvestment, exchange or transfer of Fund
shares, including the total number of Fund shares owned as of the confirmation
date, except that purchases which result from the reinvestment of daily-accrued
dividends and/or distributions will be confirmed once each calendar quarter. See
"Distributions" in the applicable Retail Prospectus. Information regarding
direct investment or any other features or plans offered by the Trusts may be
obtained by calling the Distributor at 1-800-426-0107 or by calling your broker.

Purchase by Mail

     Investors who wish to invest directly may send a check payable to PIMCO
Funds Distributors LLC, along with a completed application form to:

     PIMCO Funds Distributors LLC
     P.O. Box 9688
     Providence, RI  02940-0926

     Purchases are accepted subject to collection of checks at full value and
conversion into federal funds. Payment by a check drawn on any member of the
Federal Reserve System can normally be converted into federal funds within two
business days after receipt of the check. Checks drawn on a non-member bank may
take up to 15 days to convert into federal funds. In all cases, the purchase
price is based on the net asset value next determined after the purchase

                                      SG-4
<PAGE>

order and check are accepted, even though the check may not yet have been
converted into federal funds.

Subsequent Purchases of Shares

     Subsequent purchases of Class A, Class B or Class C shares can be made as
indicated above by mailing a check with a letter describing the investment or
with the additional investment portion of a confirmation statement. Except for
subsequent purchases through the PIMCO Funds Auto-Invest plan, the PIMCO Funds
Auto-Exchange plan, tax-qualified programs and PIMCO Funds Fund Link referred to
below, and except during periods when an Automatic Withdrawal Plan is in effect,
the minimum subsequent purchase is $100 in any Fund. All payments should be made
payable to PIMCO Funds Distributors LLC and should clearly indicate the
shareholder's account number. Checks should be mailed to the address above under
"Purchase by Mail."

Tax-Qualified Retirement Plans

     The Distributor makes available retirement plan services and documents for
Individual Retirement Accounts (IRAs), including Roth IRAs, for which Boston
Safe Deposit & Trust Company serves as trustee and for IRA Accounts established
with Form 5305-SIMPLE under the Internal Revenue Code of 1986, as amended (the
"Code"). These accounts include Simplified Employee Pension Plan (SEP) and
Salary Reduction Simplified Employee Pension Plan (SAR/SEP) IRA and SIMPLE IRA
accounts and prototype documents. In addition, prototype documents are available
for establishing 403(b)(7) custodial accounts with Boston Safe Deposit & Trust
Company as custodian. This type of plan is available to employees of certain
non-profit organizations.

     The Distributor also makes available prototype documents for establishing
Money Purchase and/or Profit Sharing Plans and 401(k) Retirement Savings Plans.
These prototype plans require certain minimum per participant account sizes and
certain minimum aggregate investments in the Trust, and are subject to the small
account fees described below that will apply to other plans. Investors should
call the Distributor at 1-800-426-0107 for further information about these plans
and should consult with their own tax advisers before establishing any
retirement plan. Investors who maintain their accounts with participating
brokers should consult their broker about similar types of accounts that may be
offered through the broker. The minimum initial investment for all tax-qualified
plans (except for employer-sponsored plans, SIMPLE IRAs, SEPs and SAR/SEPs) is
$1,000 per Fund and the minimum subsequent investment is $100. The minimum
initial investment for employer-sponsored plans, SIMPLE IRAs, SEPs and SAR/SEPs
and the minimum subsequent investment per Fund for all such plans is $50.

PIMCO Funds Auto-Invest

     The PIMCO Funds Auto-Invest plan provides for periodic investments into the
shareholder's account with the Trust by means of automatic transfers of a
designated amount from the shareholder's bank account. The minimum investment
for eligibility in the PIMCO Funds Auto-Invest plan is $1,000 per Fund.
Investments may be made monthly or quarterly,

                                      SG-5
<PAGE>

and may be in any amount subject to a minimum of $50 per month for each Fund in
which shares are purchased through the plan. Further information regarding the
PIMCO Funds Auto-Invest plan is available from the Distributor or participating
brokers. You may enroll by completing the appropriate section on the account
application, or you may obtain an Auto-Invest application by calling the
Distributor or your broker.

PIMCO Funds Auto-Exchange

     The PIMCO Funds Auto-Exchange plan establishes regular, periodic exchanges
from one Fund account to another Fund account.  The plan provides for regular
investments into a shareholder's account in a specific Fund by means of
automatic exchanges of a designated amount from another Fund account of the same
class of shares and with identical account registration.

     Exchanges may be made monthly or quarterly, and may be in any amount
subject to a minimum of $1,000 to open a new Fund account and of $50 for any
existing Fund account for which shares are purchased through the plan.

     Further information regarding the PIMCO Funds Auto-Exchange plan is
available from the Distributor at 1-800-426-0107 or participating brokers. You
may enroll by completing an application which may be obtained from the
Distributor or by telephone request at 1-800-426-0107. For more information on
exchanges, see "Exchange Privilege."

PIMCO Funds Fund Link

     PIMCO Funds Fund Link ("Fund Link") connects your Fund account(s) with a
bank account. Fund Link may be used for subsequent purchases and for redemptions
and other transactions described under "How to Redeem." Purchase transactions
are effected by electronic funds transfers from the shareholder's account at a
U.S. bank or other financial institution that is an Automated Clearing House
("ACH") member. Investors may use Fund Link to make subsequent purchases of
shares in amounts from $50 to $10,000. To initiate such purchases, call 1-800-
426-0107. All such calls will be recorded. Fund Link is normally established
within 45 days of receipt of a Fund Link application by PFPC, Inc. (the
"Transfer Agent"), the Funds' transfer agent for Class A, B and C shares. The
minimum investment by Fund Link is $50 per Fund. Shares will be purchased on the
regular business day the Distributor receives the funds through the ACH system,
provided the funds are received before the close of regular trading on the New
York Stock Exchange. If the funds are received after the close of regular
trading, the shares will be purchased on the next regular business day.

     Fund Link privileges must be requested on the account application. To
establish Fund Link on an existing account, complete a Fund Link application,
which is available from the Distributor or your broker, with signatures
guaranteed from all shareholders of record for the account. See "Signature
Guarantee" below. Such privileges apply to each shareholder of record for the
account unless and until the Distributor receives written instructions from a
shareholder of record canceling such privileges. Changes of bank account
information must be made by completing a new Fund Link application signed by all
owners of record of the account, with all signatures guaranteed. The
Distributor, the Transfer Agent and the Fund may

                                      SG-6
<PAGE>

rely on any telephone instructions believed to be genuine and will not be
responsible to shareholders for any damage, loss or expenses arising out of such
instructions. The Fund reserves the right to amend, suspend or discontinue Fund
Link privileges at any time without prior notice. Fund Link does not apply to
shares held in broker "street name" accounts.

Signature Guarantee

     When a signature guarantee is called for, the shareholder should have
"Signature Guaranteed" stamped under his signature and guaranteed by any of
the following entities: U.S. banks, foreign banks having a U.S. correspondent
bank, credit unions, savings associations, U.S. registered dealers and brokers,
municipal securities dealers and brokers, government securities dealers and
brokers, national securities exchanges, registered securities associations and
clearing agencies (each an "Eligible Guarantor Institution"). The Distributor
reserves the right to reject any signature guarantee pursuant to its written
signature guarantee standards or procedures, which may be revised in the future
to permit it to reject signature guarantees from Eligible Guarantor Institutions
that do not, based on credit guidelines, satisfy such written standards or
procedures.  The Funds may change the signature guarantee requirements from time
to time upon notice to shareholders, which may be given by means of a new or
supplemented Retail Prospectus.

Account Registration Changes

     Changes in registration or account privileges may be made in writing to the
Transfer Agent. Signature guarantees may be required. See "Signature
Guarantee" above. All correspondence must include the account number and must
be sent to:

     PIMCO Funds Distributors LLC
     P.O. Box 9688
     Providence, RI  02940-0926

Small Account Fee

     Because of the disproportionately high costs of servicing accounts with low
balances, a fee at an annual rate of $16 (paid to the applicable Fund's
administrator) will automatically be deducted from direct Fund accounts with
balances falling below a minimum level. The valuation of Fund accounts and the
deduction are expected to take place during the last five business days of each
calendar quarter. The fee will be deducted in quarterly installments from Fund
accounts with balances below $2,500, except for Uniform Gift to Minors, IRA,
Roth IRA and Auto-Invest accounts, for which the limit is $1,000.  The fee also
applies to employer-sponsored retirement plan accounts, Money Purchase and/or
Profit Sharing plans, 401(k) plans, 403(b)(7) custodial accounts, SIMPLE IRAs,
SEPs and SAR/SEPs. (A separate custodial fee may apply to IRAs, Roth IRAs and
other retirement accounts.)  No fee will be charged on any Fund account of a
shareholder if the aggregate value of all of the shareholder's Fund accounts is
at least $50,000. Any applicable small account fee will be deducted
automatically from your below-minimum Fund account in quarterly installments and
paid to the Administrator.  Each Fund account will normally be valued, and any
deduction taken,

                                      SG-7
<PAGE>

during the last five business days of each calendar quarter. No small account
fee will be charged to employee and employee-related accounts of PIMCO Advisors
and/or, in the discretion of PIMCO Advisors, its affiliates.

Minimum Account Size

     Due to the relatively high cost to the Funds of maintaining small accounts,
you are asked to maintain an account balance in each Fund in which you invest of
at least the amount necessary to open the type of account involved. If your
balance for any Fund is below such minimum for three months or longer, the
applicable Fund's administrator shall have the right (except in the case of
employer-sponsored retirement accounts) to close that Fund account after giving
you 60 days in which to increase your balance. Your Fund account will not be
liquidated if the reduction in size is due solely to market decline in the value
of your Fund shares or if the aggregate value of all your accounts in PIMCO
Funds exceeds $50,000.

Alternative Purchase Arrangements

     The Funds offer investors Class A, Class B and Class C shares in the
applicable Retail Prospectus.  Class A, B and C shares bear sales charges in
different forms and amounts and bear different levels of expenses, as described
below. Through separate prospectuses, certain of the Funds currently offer up to
three additional classes of shares in the United States:  Class D, Institutional
Class and Administrative Class shares.  Class D shares are offered through
financial intermediaries. Institutional Class shares are offered to pension and
profit sharing plans, employee benefit trusts, endowments, foundations,
corporations and other high net worth individuals. Administrative Class shares
are offered primarily through employee benefit plan alliances, broker-dealers
and other intermediaries.  Class D, Institutional Class and Administrative Class
shares are sold without a sales charge and have different expenses than Class A,
Class B and Class C shares. As a result of lower sales charges and/or operating
expenses, Class D, Institutional Class and Administrative Class shares are
generally expected to achieve higher investment returns than Class A, Class B or
Class C shares. Certain Funds also offer up to two additional classes of shares
that are offered only to non-U.S. investors outside the United States: Class J
and Class K shares.  To obtain more information about the other classes of
shares, please call the applicable Trust at 1-800-927-4648 (for Institutional
and Administrative Class shares) or the Distributor at 1-888-87-PIMCO (for Class
D shares).

     The alternative purchase arrangements described in this Guide are designed
to enable a retail investor to choose the method of purchasing Fund shares that
is most beneficial to the investor based on all factors to be considered,
including the amount and intended length of the investment, the particular Fund
and whether the investor intends to exchange shares for shares of other Funds.
Generally, when making an investment decision, investors should consider the
anticipated life of an intended investment in the Funds, the accumulated
distribution and servicing fees plus CDSCs on Class B or Class C shares, the
initial sales charge plus accumulated servicing fees on Class A shares (plus a
CDSC in certain circumstances), the possibility that the anticipated higher
return on Class A shares due to the lower ongoing charges will offset the
initial sales charge paid on such shares, the automatic conversion of

                                      SG-8
<PAGE>

Class B shares to Class A shares and the difference in the CDSCs applicable to
Class A, Class B and Class C shares.

Class A The initial sales charge alternative (Class A) might be preferred by
investors purchasing shares of sufficient aggregate value to qualify for
reductions in the initial sales charge applicable to such shares. Similar
reductions are not available on the contingent deferred sales charge alternative
(Class B) or the asset based sales charge alternative (Class C). Class A shares
are subject to a servicing fee but are not subject to a distribution fee and,
accordingly, such shares are expected to pay correspondingly higher dividends on
a per share basis. However, because initial sales charges are deducted at the
time of purchase, not all of the purchase payment for Class A shares is invested
initially. Class B and Class C shares might be preferable to investors who wish
to have all purchase payments invested initially, although remaining subject to
higher distribution and servicing fees and, for certain periods, being subject
to a CDSC. An investor who qualifies for an elimination of the Class A initial
sales charge should also consider whether he or she anticipates redeeming shares
in a time period which will subject such shares to a CDSC as described below.
See "Initial Sales Charge Alternative--Class A Shares--Class A Deferred Sales
Charge" below.

Class B Class B shares might be preferred by investors who intend to invest in
the Funds for longer periods and who do not intend to purchase shares of
sufficient aggregate value to qualify for sales charge reductions applicable to
Class A shares. Both Class B and Class C shares can be purchased at net asset
value without an initial sales charge. However, unlike Class C shares, Class B
shares convert into Class A shares after the shares have been held for seven
years. After the conversion takes place, the shares will no longer be subject to
a CDSC, and will be subject to the servicing fees charged for Class A shares
which are lower than the distribution and servicing fees charged on either Class
B or Class C shares. See "Deferred Sales Charge Alternative--Class B Shares"
below. Class B shares are not available for purchase by employer sponsored
retirement plans.

Class C Class C shares might be preferred by investors who intend to purchase
shares which are not of sufficient aggregate value to qualify for Class A sales
charges of 1% or less and who wish to have all purchase payments invested
initially. Class C shares are preferable to Class B shares for investors who
intend to maintain their investment for intermediate periods and therefore may
also be preferable for investors who are unsure of the intended length of their
investment. Unlike Class B shares, Class C shares are not subject to a CDSC
after they have been held for one year and are subject to only a 1% CDSC during
the first year. However, because Class C shares do not convert into Class A
shares, Class B shares are preferable to Class C shares for investors who intend
to maintain their investment in the Funds for long periods. See "Asset Based
Sales Charge Alternative--Class C Shares" below.

     In determining which class of shares to purchase, an investor should always
consider whether any waiver or reduction of a sales charge or a CDSC is
available. See generally "Initial Sales Charge Alternative--Class A Shares"
and "Waiver of Contingent Deferred Sales Charges" below.

                                      SG-9
<PAGE>

     The maximum single purchase of Class B shares of a Fund is $249,999.  The
maximum single purchase of Class C shares of a Fund is $999,999.  The Funds may
refuse any order to purchase shares.

     For a description of the Distribution and Servicing Plans and distribution
and servicing fees payable thereunder with respect to Class A, Class B and Class
C shares, see "Distributor and Distribution and Servicing Plans" below.

Waiver of Contingent Deferred Sales Charges  The CDSC applicable to Class A and
Class C shares is currently waived for (i) any partial or complete redemption in
connection with (a) required minimum distributions to IRA account owners or
beneficiaries who are age 70 1/2 or older or (b) distributions to participants
in employer-sponsored retirement plans upon attaining age 59 1/2 or on account
of death or disability; (ii) any partial or complete redemption in connection
with a qualifying loan or hardship withdrawal from an employer sponsored
retirement plan; (iii) any complete redemption in connection with a distribution
from a qualified employer retirement plan in connection with termination of
employment or termination of the employer's plan and the transfer to another
employer's plan or to an IRA (with the exception of a Roth IRA); (iv) any
partial or complete redemption following death or disability (as defined in the
Internal Revenue Code) of a shareholder (including one who owns the shares as
joint tenant with his or her spouse) from an account in which the deceased or
disabled is named, provided the redemption is requested within one year of the
death or initial determination of disability; (v) any redemption resulting from
a return of an excess contribution to a qualified employer retirement plan or an
IRA (with the exception of a Roth IRA); (vi) up to 10% per year of the value of
a Fund account which (a) has the value of at least $10,000 at the start of such
year and (b) is subject to an Automatic Withdrawal Plan; (vii) redemptions by
Trustees, officers and employees of either Trust, and by directors, officers and
employees of the Distributor, PIMCO Advisors or Pacific Investment Management
Company; (viii) redemptions effected pursuant to a Fund's right to involuntarily
redeem a shareholder's Fund account if the aggregate net asset value of shares
held in such shareholder's account is less than a minimum account size specified
in such Fund's prospectus; (ix) involuntary redemptions caused by operation of
law; (x) redemption of shares of any Fund that is combined with another Fund,
investment company, or personal holding company by virtue of a merger,
acquisition or other similar reorganization transaction; (xi) redemptions by a
shareholder who is a participant making periodic purchases of not less than $50
through certain employer sponsored savings plans that are clients of a broker-
dealer with which the Distributor has an agreement with respect to such
purchases; (xii) redemptions effected by trustees or other fiduciaries who have
purchased shares for employer-sponsored plans, the trustee, administrator,
fiduciary, broker, trust company or registered investment adviser for which has
an agreement with the Distributor with respect to such purchases; (xiii)
redemptions in connection with IRA accounts established with Form 5305-SIMPLE
under the Code for which the Trust is the designated financial institution;
(xiv) a redemption by a holder of Class A shares who purchased $1,000,000 or
more of Class A shares (and therefore did not pay a sales charge) where the
participating broker or dealer involved in the sale of such shares waived the
commission it would normally receive from the Distributor pursuant to an
agreement with the Distributor; or (xv) a redemption by a holder of Class A
shares where the participating broker or dealer involved in the purchase of such
shares waived the commission it normally would

                                     SG-10
<PAGE>

receive from the Distributor in connection with such purchase pursuant to an
agreement with the Distributor.

     The CDSC applicable to Class B shares is currently waived for any partial
or complete redemption in each of the following cases: (a) in connection with
required minimum distributions to IRA account owners or to plan participants or
beneficiaries who are age 70 1/2 or older; (b) involuntary redemptions caused by
operation of law; (c) redemption of shares of any Fund that is combined with
another Fund, investment company, or personal holding company by virtue of a
merger, acquisition or other similar reorganization transaction; (d) following
death or disability (as defined in the Code) of a shareholder (including one who
owns the shares as joint tenant with his or her spouse) from an account in which
the deceased or disabled is named, provided the redemption is requested within
one year of the death or initial determination of disability; and (e) up to 10%
per year of the value of a Fund account which (i) has a value of at least
$10,000 at the start of such year and (ii) is subject to an Automatic Withdrawal
Plan. See "How to Redeem--Automatic Withdrawal Plan."

     The Distributor may require documentation prior to waiver of the CDSC for
any class, including distribution letters, certification by plan administrators,
applicable tax forms, death certificates, physicians' certificates, etc.

Initial Sales Charge Alternative--Class A Shares

     Class A shares are sold at a public offering price equal to their net asset
value per share plus a sales charge, as set forth below. As indicated below
under "Class A Deferred Sales Charge," certain investors that purchase
$1,000,000 or more of any Fund's Class A shares (and thus pay no initial sales
charge) may be subject to a 1% CDSC if they redeem such shares during the first
18 months after their purchase.

                                     SG-11
<PAGE>

                    Initial Sales Charge -- Class A Shares

PIMCO Growth, Select Growth, Target, Opportunity, Capital Appreciation, Mid-Cap,
Equity Income, Renaissance, Value, Small-Cap Value, Tax-Efficient Equity,
International, Innovation and Global Innovation Funds, and PIMCO Funds Asset
Allocation Series -- 90/10 and 40/60 Portfolios

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             5.82%                         5.50%                         4.75%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        4.71%                         4.50%                         4.00%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - 249,999       3.63%                         3.50%                         3.00%
- --------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999      2.56%                         2.50%                         2.00%
- --------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999      2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$1,000,000 +             0.00%/(1)/                    0.00%/(1)/                    0.75%/(2)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

PIMCO Funds Asset Allocation Series -- 30/70 Portfolio

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             4.71%                         4.50%                         4.00%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        4.17%                         4.00%                         3.50%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - 249,999       3.63%                         3.50%                         3.00%
- --------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999      2.56%                         2.50%                         2.00%
- --------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999      2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$1,000,000 +             0.00%/(1)/                    0.00%/(1)/                    0.50%/(2)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

                                     SG-12
<PAGE>

PIMCO Total Return, High Yield, Long-Term U.S. Government, Global Bond II,
Foreign Bond, Emerging Markets Bond, Strategic Balanced and Convertible Funds

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             4.71%                         4.50%                         4.00%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        4.17%                         4.00%                         3.50%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999      3.63%                         3.50%                         3.00%
- --------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999      2.56%                         2.50%                         2.00%
- --------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999      2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$1,000,000+              0.00%/(1)/                    0.00%/(1)/                    0.50%/(3)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

PIMCO Low Duration, Real Return Bond, Municipal Bond and StocksPLUS Funds

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             3.09%                         3.00%                         2.50%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        2.56%                         2.50%                         2.00%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999      2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$250,000 - $499,999      1.52%                         1.50%                         1.25%
- --------------------------------------------------------------------------------------------------------------------
$500,000 - $999,999      1.27%                         1.25%                         1.00%
- --------------------------------------------------------------------------------------------------------------------
$1,000,000+              0.00%/(1)/                    0.00%/(1)/                    0.50%/(3)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

                                     SG-13
<PAGE>

PIMCO Short-Term Fund

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        1.78%                         1.75%                         1.50%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999      1.52%                         1.50%                         1.25%
- --------------------------------------------------------------------------------------------------------------------
$250,000+                0.00%/(1)/                    0.00%/(1)/                    0.25%/(3)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

PIMCO California and New York Intermediate Bond Funds

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------
Amount of Purchase       Sales Charge as % of Net      Sales Charge as % of Public   Discount or Commission to
                         Amount Invested               Offering Price                dealers as % of Public Offering
                                                                                     Price
- --------------------------------------------------------------------------------------------------------------------
<S>                      <C>                           <C>                           <C>
$0 - $49,999             3.09%                         3.00%                         2.75%
- --------------------------------------------------------------------------------------------------------------------
$50,000 - $99,999        2.04%                         2.00%                         1.75%
- --------------------------------------------------------------------------------------------------------------------
$100,000 - $249,999      2.01%                         1.00%                         0.90%
- --------------------------------------------------------------------------------------------------------------------
$250,000+                0.00%/(1)/                    0.00%/(1)/                    0.25%/(4)/
- --------------------------------------------------------------------------------------------------------------------
</TABLE>

1.   As shown, investors that purchase more than $1,000,000 of any Fund's Class
     A shares ($250,000 in the case of the PIMCO Short-Term Fund) will not pay
     any initial sales charge on such purchase. However, except with regard to
     purchases of Class A shares of the PIMCO Money Market, California
     Intermediate Bond and New York Intermediate Bond Funds, purchasers of
     $1,000,000 or more ($250,000 in the case of the PIMCO Short-Term Fund) of
     Class A shares (other than those purchasers described below under "Sales
     at Net Asset Value" where no commission is paid) will be subject to a CDSC
     of 1% if such shares are redeemed during the first 18 months after such
     shares are purchased unless such purchaser is eligible for a waiver of the
     CDSC as described under "Waiver of Contingent Deferred Sales Charges"
     above. See "Class A Deferred Sales Charge" below.

2.   The Distributor will pay a commission to dealers who sell amounts of
     $1,000,000 or more of Class A shares (or who sell Class A shares at net
     asset value to certain employer-sponsored plans as outlined in "Sales at
     Net Asset Value" below) of each of these  Funds and the Portfolios (except
     for the 30/70 Portfolio) according to the following schedule: 0.75% of the
     first $2,000,000, 0.50% of amounts from $2,000,001 to $5,000,000, and 0.25%
     of amounts over $5,000,000; and of the 30/70 Portfolio according to the
     following schedule: 0.50% of the first $2,000,000, and 0.25% of amounts
     over $2,000,000.

3.   The Distributor will pay a commission to dealers who sell amounts of
     $1,000,000 ($250,000 in the case of the PIMCO Short-Term Fund) or more of
     Class A shares (or who sell Class A shares at net asset value to certain
     employer-sponsored plans as outlined in "Sales at Net Asset Value") of each
     of these Funds except for the PIMCO Money Market Fund (for which no payment
     is made) and the PIMCO Short-Term and Short Duration Municipal Income
     Funds, according to the following schedule: 0.50% of the first $2,000,000
     and 0.25% of amounts over $2,000,000; and 0.25% of sales of Class A shares
     of the PIMCO Short-Term and Short Duration Municipal Income Funds in excess
     of $250,000.

4.   The Distributor will pay a commission to dealers who sell $250,000 or more
     of Class A shares of the PIMCO California Intermediate Bond and New York
     Intermediate Bond Funds at an annual rate of 0.25%, to be paid in quarterly
     installments.

                                     SG-14
<PAGE>

     Each Fund receives the entire net asset value of its Class A shares
purchased by investors. The Distributor receives the sales charge shown above
less any applicable discount or commission "reallowed" to participating
brokers in the amounts indicated in the table above. The Distributor may,
however, elect to reallow the entire sales charge to participating brokers for
all sales with respect to which orders are placed with the Distributor for any
particular Fund during a particular period. During such periods as may from time
to time be designated by the Distributor, the Distributor will pay an additional
amount of up to 0.50% of the purchase price on sales of Class A shares of all or
selected Funds purchased to each participating broker which obtains purchase
orders in amounts exceeding thresholds established from time to time by the
Distributor. From time to time, the Distributor, its parent and/or its
affiliates may make additional payments to one or more participating brokers
based upon factors such as the level of sales or the length of time clients'
assets have remained in the Trust.

     Shares issued pursuant to the automatic reinvestment of income dividends or
capital gains distributions are issued at net asset value and are not subject to
any sales charges.

     Under the circumstances described below, investors may be entitled to pay
reduced sales charges for Class A shares.

Combined Purchase Privilege Investors may qualify for a reduced sales charge by
combining purchases of the Class A shares of one or more Funds which offer Class
A shares (together, "eligible PIMCO Funds") into a "single purchase," if the
resulting purchase totals at least $50,000. The term single purchase refers to:

     (i)    a single purchase by an individual, or concurrent purchases, which
            in the aggregate are at least equal to the prescribed amounts, by an
            individual, his or her spouse and their children under the age of 21
            years purchasing Class A shares of the eligible PIMCO Funds for his,
            her or their own account;

     (ii)   single purchase by a trustee or other fiduciary purchasing shares
            for a single trust, estate or fiduciary account although more than
            one beneficiary is involved; or

     (iii)  a single purchase for the employee benefit plans of a single
            employer.

     For further information, call the Distributor at 1-800-426-0107 or your
     broker.

Cumulative Quantity Discount (Right of Accumulation) A purchase of additional
Class A shares of any eligible PIMCO Fund may qualify for a Cumulative Quantity
Discount at the rate applicable to the discount bracket obtained by adding:

     (i)    the investor's current purchase;

     (ii)   the value (at the close of business on the day of the current
            purchase) of all Class A shares of any eligible PIMCO Fund held by
            the investor computed at the maximum offering price; and

                                     SG-15
<PAGE>

     (iii)  the value of all shares described in paragraph (ii) owned by another
            shareholder eligible to be combined with the investor's purchase
            into a "single purchase" as defined above under "Combined Purchase
            Privilege."

     For example, if you owned Class A shares of the PIMCO Equity Income Fund
     worth $25,000 at the current maximum offering price and wished to purchase
     Class A shares of the PIMCO Growth Fund worth an additional $30,000, the
     sales charge for the $30,000 purchase would be at the 4.50% rate applicable
     to a single $55,000 purchase of shares of the PIMCO Growth Fund, rather
     than the 5.50% rate.

Letter of Intent An investor may also obtain a reduced sales charge by means of
a written Letter of Intent, which expresses an intention to invest not less than
$50,000 within a period of 13 months in Class A shares of any eligible PIMCO
Fund(s) other than the PIMCO Money Market Fund. Each purchase of shares under a
Letter of Intent will be made at the public offering price or prices applicable
at the time of such purchase to a single transaction of the dollar amount
indicated in the Letter. At the investor's option, a Letter of Intent may
include purchases of Class A shares of any eligible PIMCO Fund (other than the
PIMCO Money Market Fund) made not more than 90 days prior to the date the Letter
of Intent is signed; however, the 13-month period during which the Letter is in
effect will begin on the date of the earliest purchase to be included and the
sales charge on any purchases prior to the Letter will not be adjusted.

     Investors qualifying for the Combined Purchase Privilege described above
may purchase shares of the eligible PIMCO Funds under a single Letter of Intent.
For example, if at the time you sign a Letter of Intent to invest at least
$100,000 in Class A shares of any Fund (other than the PIMCO Money Market Fund),
you and your spouse each purchase Class A shares of the PIMCO Growth Fund worth
$30,000 (for a total of $60,000), it will only be necessary to invest a total of
$40,000 during the following 13 months in Class A shares of any of the Funds
(other than the PIMCO Money Market Fund) to qualify for the 3.50% sales charge
on the total amount being invested (the sales charge applicable to an investment
of $100,000 in any of the Funds other than the PIMCO Money Market, Short-Term,
Low Duration, Real Return Bond, Short Duration Municipal Income, Municipal Bond,
California Intermediate Municipal Bond, New York Intermediate Municipal Bond and
StocksPLUS Funds).

     A Letter of Intent is not a binding obligation to purchase the full amount
indicated. The minimum initial investment under a Letter of Intent is 5% of such
amount. Shares purchased with the first 5% of such amount will be held in escrow
(while remaining registered in your name) to secure payment of the higher sales
charge applicable to the shares actually purchased in the event the full
intended amount is not purchased. If the full amount indicated is not purchased,
a sufficient amount of such escrowed shares will be involuntarily redeemed to
pay the additional sales charge applicable to the amount actually purchased, if
necessary. Dividends on escrowed shares, whether paid in cash or reinvested in
additional eligible PIMCO Fund shares, are not subject to escrow. When the full
amount indicated has been purchased, the escrow will be released.

     If you wish to enter into a Letter of Intent in conjunction with your
initial investment in Class A shares of a Fund, you should complete the
appropriate portion of the account application. If you are a current Class A
shareholder desiring to do so you may obtain a form of Letter of Intent by
contacting the Distributor at 1-800-426-0107 or any broker participating in this
program.

                                     SG-16
<PAGE>

Reinstatement Privilege A Class A shareholder who has caused any or all of his
shares (other than PIMCO Money Market Fund shares that were not acquired by
exchanging Class A shares of another Fund) to be redeemed may reinvest all or
any portion of the redemption proceeds in Class A shares of any eligible PIMCO
Fund at net asset value without any sales charge, provided that such
reinvestment is made within 120 calendar days after the redemption or repurchase
date. Shares are sold to a reinvesting shareholder at the net asset value next
determined. See "How Net Asset Value is Determined" in the applicable Retail
Prospectus.  A reinstatement pursuant to this privilege will not cancel the
redemption transaction and, consequently, any gain or loss so realized may be
recognized for federal tax purposes except that no loss may be recognized to the
extent that the proceeds are reinvested in shares of the same Fund within 30
days. The reinstatement privilege may be utilized by a shareholder only once,
irrespective of the number of shares redeemed, except that the privilege may be
utilized without limit in connection with transactions whose sole purpose is to
transfer a shareholder's interest in a Fund to his Individual Retirement Account
or other qualified retirement plan account. An investor may exercise the
reinstatement privilege by written request sent to the Distributor or to the
investor's broker.

Sales at Net Asset Value Each Fund may sell its Class A shares at net asset
value without a sales charge to (a) current or retired officers, trustees,
directors or employees of either Trust, PIMCO Advisors, Pacific Investment
Management Company or the Distributor, other affiliates of PIMCO Advisors at the
discretion of PIMCO Advisors, Pacific Investment Management Company or the
Distributor, a parent, brother or sister of any such officer, trustee, director
or employee or a spouse or child of any of the foregoing persons, or any trust,
profit sharing or pension plan for the benefit of any such person and to any
other person if the Distributor anticipates that there will be minimal sales
expenses associated with the sale, (b) current registered representatives and
other full-time employees of participating brokers or such persons' spouses or
for trust or custodial accounts for their minor children, (c) trustees or other
fiduciaries purchasing shares for certain plans sponsored by employers,
professional organizations or associations or charitable organizations, the
trustee, administrator, fiduciary, broker, trust company or registered
investment adviser for which has an agreement with the Distributor with respect
to such purchases (including provisions related to minimum levels of investment
in the Trust), and to participants in such plans and their spouses purchasing
for their account(s) or IRAs (with the exception of Roth IRAs), (d) participants
investing through accounts known as "wrap accounts" established with brokers
or dealers approved by the Distributor where such brokers or dealers are paid a
single, inclusive fee for brokerage and investment management services, (e)
client accounts of broker-dealers or registered investment advisers affiliated
with such broker-dealers with which the Distributor has an agreement for the use
of a Fund in particular investment products or programs, (f) accounts for which
certain trust companies that may be affiliated with the Trust or the Fund's
Adviser serves as trustee or custodian, and (g) former Class A, Class B and
Class C shareholders of the former PIMCO Emerging Markets Fund and PIMCO
International Developed Fund (the "Former Funds") who had all of their shares in
such Former Fund redeemed in connection with reorganization transactions (the
"April Transactions") involving these Funds on April 30, 1999; provided,
however, that this waiver applies only until the close of business on December
31, 1999 and, for each such former shareholder, only with respect to a single
purchase transaction involving the investment in one or more Funds of some or
all of the redemption proceeds received by the shareholder in connection with
the April Transactions. As described above, the Distributor will not pay any
initial commission to dealers upon the sale of Class A shares to the purchasers
described in this paragraph except for sales to purchasers described under (c)
in this paragraph.

                                     SG-17
<PAGE>

Notification of Distributor An investor or participating broker must notify the
Distributor whenever a quantity discount or reduced sales charge is applicable
to a purchase and must provide the Distributor with sufficient information at
the time of purchase to verify that each purchase qualifies for the privilege or
discount. Upon such notification, the investor will receive the lowest
applicable sales charge. The quantity discounts described above may be modified
or terminated at any time.

Class A Deferred Sales Charge For all Funds, except the PIMCO Money Market,
California Intermediate Municipal Bond and New York Intermediate Municipal Bond
Funds, investors who purchase $1,000,000 ($250,000 in the case of the PIMCO
Short-Term Fund) or more of Class A shares (and, thus, purchase such shares
without any initial sales charge) may be subject to a 1% CDSC (the "Class A
CDSC") if such shares are redeemed within 18 months of their purchase. The
Class A CDSC does not apply to investors purchasing $1,000,000 ($250,000 in the
case of the PIMCO Short-Term and Short Duration Municipal Income Funds) or more
of any Fund's Class A shares if such investors are otherwise eligible to
purchase Class A shares without any sales charge because they are described
under "Sales at Net Asset Value" above.

     For purchases subject to the Class A CDSC, a 1% CDSC will apply for any
redemption of such Class A shares that occurs within 18 months of their
purchase. No CDSC will be imposed if the shares redeemed have been acquired
through the reinvestment of dividends or capital gains distributions or if the
amount redeemed is derived from increases in the value of the account above the
amount of purchase payments subject to the CDSC. In determining whether a CDSC
is payable, it is assumed that Class A shares acquired through the reinvestment
of dividends and distributions are redeemed first, and thereafter that Class A
shares that have been held by an investor for the longest period of time are
redeemed first.

     The Class A CDSC does not apply to Class A shares of the PIMCO Money
Market, California Intermediate Municipal Bond and New York Intermediate
Municipal Bond Funds  but, if Class A shares of these Funds are purchased in a
transaction that, for any other Fund, would be subject to the CDSC (i.e., a
purchase of $1,000,000 ($250,000 in the case of the PIMCO Short-Term and Short
Duration Municipal Income Funds) or more) and are subsequently exchanged for
Class A shares of any other Fund, a Class A CDSC will apply to the shares of the
Fund(s) acquired by exchange for a period of 18 months from the date of the
exchange.

     The Class A CDSC is currently waived in connection with certain redemptions
as described above under "Alternative Purchase Arrangements--Waiver of
Contingent Deferred Sales Charges." For more information about the Class A CDSC,
call the Distributor at 1-800-426-0107.

Participating Brokers Investment dealers and other financial intermediaries
provide varying arrangements for their clients to purchase and redeem Fund
shares. Some may establish higher minimum investment requirements than set forth
above. Firms may arrange with their clients for other investment or
administrative services and may independently establish and charge transaction
fees and/or other additional amounts to their clients for such services, which
charges would reduce clients' return. Firms also may hold Fund shares in nominee
or street name as agent for and on behalf of their customers. In such instances,
the Trust's transfer agent will have no information with respect to or control
over accounts of specific

                                     SG-18
<PAGE>

shareholders. Such shareholders may obtain access to their accounts and
information about their accounts only from their broker. In addition, certain
privileges with respect to the purchase and redemption of shares or the
reinvestment of dividends may not be available through such firms. Some firms
may participate in a program allowing them access to their clients' accounts for
servicing including, without limitation, transfers of registration and dividend
payee changes; and may perform functions such as generation of confirmation
statements and disbursement of cash dividends. This Guide and the Retail
Prospectuses should be read in connection with such firms' material regarding
their fees and services.

Deferred Sales Charge Alternative--Class B Shares

     Class B shares are sold at their current net asset value without any
initial sales charge. The full amount of an investor's purchase payment will be
invested in shares of the Fund(s) selected. A CDSC will be imposed on Class B
shares if an investor redeems an amount which causes the current value of the
investor's account for a Fund to fall below the total dollar amount of purchase
payments subject to the CDSC, except that no CDSC is imposed if the shares
redeemed have been acquired through the reinvestment of dividends or capital
gains distributions or if the amount redeemed is derived from increases in the
value of the account above the amount of purchase payments subject to the CDSC.

     Class B shares of the PIMCO Short-Term Fund and the PIMCO Money Market Fund
are not offered for initial purchase but may be obtained through exchanges of
Class B shares of other Funds.  See "Exchange Privilege" below.  Class B shares
are not available for purchase by employer sponsored retirement plans.

     Whether a CDSC is imposed and the amount of the CDSC will depend on the
number of years since the investor made a purchase payment from which an amount
is being redeemed. Purchases are subject to the CDSC according to the following
schedule:

<TABLE>
<CAPTION>

     Years Since Purchase               Percentage Contingent
     Payment was Made                   Deferred Sales Charge
     ----------------                   ---------------------
     <S>                                <C>
     First                                       5
     Second                                      4
     Third                                       3
     Fourth                                      3
     Fifth                                       2
     Sixth                                       1
     Seventh                                     0*
</TABLE>

     *    After the seventh year, Class B shares convert into Class A shares as
          described below.

     In determining whether a CDSC is payable, it is assumed that the purchase
payment from which a redemption is made is the earliest purchase payment from
which a redemption or exchange has not already been fully effected.

                                     SG-19
<PAGE>

     The following example will illustrate the operation of the Class B CDSC:

     Assume that an individual opens a Fund account and makes a purchase payment
of $10,000 for Class B shares of a Fund and that six months later the value of
the investor's account for that Fund has grown through investment performance
and reinvestment of distributions to $11,000. The investor then may redeem up to
$1,000 from that Fund account ($11,000 minus $10,000) without incurring a CDSC.
If the investor should redeem $3,000 from that Fund account, a CDSC would be
imposed on $2,000 of the redemption (the amount by which the investor's account
for the Fund was reduced below the amount of the purchase payment). At the rate
of 5%, the Class B CDSC would be $100.

     In determining whether an amount is available for redemption without
incurring a CDSC, the purchase payments made for all Class B shares in the
shareholder's account for the particular Fund are aggregated, and the current
value of all such shares is aggregated. Any CDSC imposed on a redemption of
Class B shares is paid to the Distributor.

     Class B shares are subject to higher distribution fees than Class A shares
for a fixed period after their purchase, after which they automatically convert
to Class A shares and are no longer subject to such higher distribution fees.
Class B shares of each Fund automatically convert into Class A shares after they
have been held for seven years.

     For sales of Class B shares made and services rendered to Class B
shareholders, the Distributor intends to make payments to participating brokers,
at the time a shareholder purchases Class B shares, of 4.00% of the purchase
amount for each of the Funds. During such periods as may from time to time be
designated by the Distributor, the Distributor will pay selected participating
brokers an additional amount of up to .50% of the purchase price on sales of
Class B shares of all or selected Funds purchased to each participating broker
which obtains purchase orders in amounts exceeding thresholds established from
time to time by the Distributor.

     The Class B CDSC is currently waived in connection with certain redemptions
as described above under "Alternative Purchase Arrangements --Waiver of
Contingent Deferred Sales Charges." For more information about the Class B
CDSC, call the Distributor at 1-800-426-0107.

Asset Based Sales Charge Alternative--Class C Shares

     Class C shares are sold at their current net asset value without any
initial sales charge. A CDSC is imposed on Class C shares if an investor redeems
an amount which causes the current value of the investor's account for a Fund to
fall below the total dollar amount of purchase payments subject to the CDSC,
except that no CDSC is imposed if the shares redeemed have been acquired through
the reinvestment of dividends or capital gains distributions or if the amount
redeemed is derived from increases in the value of the account above the amount
of purchase payments subject to the CDSC. All of an investor's purchase payments
are invested in shares of the Fund(s) selected.

                                     SG-20
<PAGE>

     Whether a CDSC is imposed and the amount of the CDSC will depend on the
number of years since the investor made a purchase payment from which an amount
is being redeemed. Purchases are subject to the CDSC according to the following
schedule:

<TABLE>
<CAPTION>
     Years Since Purchase               Percentage Contingent
     Payment was Made                   Deferred Sales Charge
     ----------------                   ---------------------
     <S>                                <C>
     First                                        1
     Thereafter                                   0
</TABLE>

     In determining whether a CDSC is payable, it is assumed that the purchase
payment from which the redemption is made is the earliest purchase payment (from
which a redemption or exchange has not already been effected).

     The following example will illustrate the operation of the Class C CDSC:

     Assume that an individual opens a Fund account and makes a purchase payment
of $10,000 for Class C shares of a Fund and that six months later the value of
the investor's account for that Fund has grown through investment performance
and reinvestment of distributions to $11,000. The investor then may redeem up to
$1,000 from that Fund account ($11,000 minus $10,000) without incurring a CDSC.
If the investor should redeem $3,000 from that Fund account, a CDSC would be
imposed on $2,000 of the redemption (the amount by which the investor's account
for the Fund was reduced below the amount of the purchase payment). At the rate
of 1%, the Class C CDSC would be $20.

     In determining whether an amount is available for redemption without
incurring a CDSC, the purchase payments made for all Class C shares in the
shareholder's account for the particular Fund are aggregated, and the current
value of all such shares is aggregated. Any CDSC imposed on a redemption of
Class C shares is paid to the Distributor. Unlike Class B shares, Class C shares
do not automatically convert to any other class of shares of the Funds.

     Except as described below, for sales of Class C shares made and services
rendered to Class C shareholders, the Distributor expects to make payments to
participating brokers, at the time the shareholder purchases Class C shares, of
1.00% (representing .75% distribution fees and .25% servicing fees) of the
purchase amount for all Funds, except the Money Market, Short-Term Duration,
Real Return Bond, Municipal Bond and StocksPLUS Funds.  For the PIMCO Low
Duration, Real Return Bond, Municipal Bond and StocksPLUS Funds, the Distributor
expects to make payments of .75% (representing .50% distribution fees and .25%
service fees); for the PIMCO Short-Term Fund, the Distributor expects to make
payments of .55% (representing .30% distribution fees and .25% service fees);
and for the PIMCO Money Market Fund, the Distributor expects to make no payment.
For sales of Class C shares made to participants making periodic purchases of
not less than $50 through certain employer sponsored savings plans which are
clients of a broker-dealer with which the Distributor has an agreement with
respect to such purchases, no payments are made at the time of purchase. During
such periods as may from time to time be designated by the Distributor, the
Distributor will pay an additional amount of up to .50% of the purchase price on
sales of Class C shares of

                                     SG-21
<PAGE>

all or selected Funds purchased to each participating broker which obtains
purchase orders in amounts exceeding thresholds established from time to time by
the Distributor.

     The Class C CDSC is currently waived in connection with certain redemptions
as described above under "Alternative Purchase Arrangements--Waiver of
Contingent Deferred Sales Charges." For more information about the Class C
CDSC, contact the Distributor at 1-800-426-0107.

Exchange Privilege

     Except with respect to exchanges for shares of Funds for which sales may be
suspended to new investors or as provided in the applicable Retail Prospectus or
in this Guide, a shareholder may exchange Class A, Class B and Class C shares of
any Fund for the same Class of shares of any other Fund in an account with
identical registration on the basis of their respective net asset values (except
that a sales charge will apply on exchanges of Class A shares of the PIMCO Money
Market Fund on which no sales charge was paid at the time of purchase.)  Class A
shares of the PIMCO Money Market Fund may be exchanged for Class A shares of any
other Fund, but the usual sales charges applicable to investments in such other
Fund apply on shares for which no sales charge was paid at the time of purchase.
There are currently no exchange fees or charges. All exchanges are subject to
the $2,500 minimum initial purchase requirement for each Fund, except with
respect to tax-qualified programs and exchanges effected through the PIMCO Funds
Auto-Exchange plan. An exchange will constitute a taxable sale for federal
income tax purposes.

     Investors who maintain their account with the Distributor may exchange
shares by a written exchange request sent to PIMCO Funds Distributors LLC, P.O.
Box 9688, Providence, RI 02940-0926 or, unless the investor has specifically
declined telephone exchange privileges on the account application or elected in
writing not to utilize telephone exchanges, by a telephone request to the
Distributor at 1-800-426-0107.  Each Trust will employ reasonable procedures to
confirm that instructions communicated by telephone are genuine, and may be
liable for any losses due to unauthorized or fraudulent instructions if it fails
to employ such procedures.  Each Trust will require a form of personal
identification prior to acting on a caller's telephone instructions, will
provide written confirmations of such transactions and will record telephone
instructions. Exchange forms are available from the Distributor at 1-800-426-
0107 and may be used if there will be no change in the registered name or
address of the shareholder. Changes in registration information or account
privileges may be made in writing to the Transfer Agent, PFPC, Inc., P.O. Box
9688, Providence, RI  02940-0926, or by use of forms which are available from
the Distributor. A signature guarantee is required. See "How to Buy Shares--
Signature Guarantee." Telephone exchanges may be made between 9:00 a.m.,
Eastern time and the close of regular trading (normally 4:00 p.m., Eastern time)
on the New York Stock Exchange on any day the Exchange is open (generally
weekdays other than normal holidays). The Trusts reserve the right to refuse
exchange purchases if, in the judgment of the Fund's Adviser, the purchase would
adversely affect the Fund and its shareholders. In particular, a pattern of
exchanges characteristic of "market-timing" strategies may be deemed by an
Adviser to be detrimental to a Trust or a particular Fund.

                                     SG-22
<PAGE>

     The Trusts reserve the right to refuse exchange purchases if, in the
judgment of an Adviser or a Fund's sub-adviser, the purchase would adversely
affect a Fund and its shareholders. In particular, a pattern of exchanges
characteristic of "market-timing" strategies may be deemed by an Adviser to be
detrimental to a Trust or a particular Fund.  Currently, each Trust limits the
number of "round trip" exchanges an investor may make. An investor makes a
"round trip" exchange when the investor purchases shares of a particular Fund,
subsequently exchanges those shares for shares of a different PIMCO Fund, and
then exchanges back into the originally purchased Fund. The Trusts have the
right to refuse any exchange for any investor who completes (by making the
exchange back into the shares of the originally purchased Fund) more than six
round trip exchanges in any twelve-month period. Although the Trusts have no
current intention of terminating or modifying the exchange privilege other than
as set forth in the preceding sentence, each reserves the right to do so at any
time. Except as otherwise permitted by the Securities and Exchange Commission,
each Trust will give 60 days' advance notice to shareholders of any termination
or material modification of the exchange privilege. For further information
about exchange privileges, contact your participating broker or call the
Distributor at 1-800-426-0107.

     With respect to Class B and Class C shares, or Class A shares subject to a
CDSC, if less than all of an investment is exchanged out of a Fund, any portion
of the investment attributable to capital appreciation and/or reinvested
dividends or capital gains distributions will be exchanged first, and thereafter
any portions exchanged will be from the earliest investment made in the Fund
from which the exchange was made. Shareholders should take into account the
effect of any exchange on the applicability of any CDSC that may be imposed upon
any subsequent redemption.

     Investors may also select the PIMCO Funds Auto-Exchange plan which
establishes automatic periodic exchanges. For further information on automatic
exchanges see "How to Buy Shares--PIMCO Funds Auto-Exchange" above.

Exchange Limitations

     Until July 3, 2000, shareholders will not be permitted to exchange their
shares of any Fund or series of the Trusts for shares of PIMCO Global Innovation
Fund, although investors will be permitted to exchange their shares of PIMCO
Global Innovation Fund for shares of the same class of any other Fund or series
of the Trusts, subject to any restrictions on exchanges in the applicable
Prospectus(es).  This restriction may be changed or eliminated at any time at
the discretion of the Distributor.

How to Redeem

     Class A, Class B or Class C shares may be redeemed through a participating
broker, by telephone, by submitting a written redemption request directly to the
Transfer Agent (for non-broker accounts), or through an Automatic Withdrawal
Plan or PIMCO Funds Fund Link.

     A CDSC may apply to a redemption of Class A, Class B or Class C shares. See
"Alternative Purchase Arrangements" above. Shares are redeemed at their net
asset value next

                                     SG-23
<PAGE>

determined after a redemption request has been received as described below, less
any applicable CDSC. There is no charge by the Distributor (other than an
applicable CDSC) with respect to a redemption; however, a participating broker
who processes a redemption for an investor may charge customary commissions for
its services (which may vary). Dealers and other financial services firms are
obligated to transmit orders promptly. Requests for redemption received by
dealers or other firms prior to the close of regular trading (normally 4:00
p.m., Eastern time) on the New York Stock Exchange on a regular business day and
received by the Distributor prior to the close of the Distributor's business day
will be confirmed at the net asset value effective at the closing of the
Exchange on that day, less any applicable CDSC.

     Other than an applicable CDSC, you will not pay any special fees or charges
to the Trust or the Distributor when you sell your shares.  However, if you sell
your shares through your broker, dealer or other financial intermediary, that
firm may charge you a commission or other fee for processing your redemption
request.

     Redemptions of Fund shares may be suspended when trading on the New York
Stock Exchange is restricted or during an emergency which makes it impracticable
for the Funds to dispose of their securities or to determine fairly the value of
their net assets, or during any other period as permitted by the Securities and
Exchange Commission for the protection of investors. Under these and other
unusual circumstances, the Trust may suspend redemptions or postpone payments
for more than seven days, as permitted by law.

Direct Redemption

     A shareholder's original account application permits the shareholder to
redeem by written request and by telephone (unless the shareholder specifically
elects not to utilize telephone redemptions) and to elect one or more of the
additional redemption procedures described below. A shareholder may change the
instructions indicated on his original account application, or may request
additional redemption options, only by transmitting a written direction to the
Transfer Agent. Requests to institute or change any of the additional redemption
procedures will require a signature guarantee.

     Redemption proceeds will normally be mailed to the redeeming shareholder
within seven days or, in the case of wire transfer or Fund Link redemptions,
sent to the designated bank account within one business day. Fund Link
redemptions may be received by the bank on the second or third business day. In
cases where shares have recently been purchased by personal check, redemption
proceeds may be withheld until the check has been collected, which may take up
to 15 days. To avoid such withholding, investors should purchase shares by
certified or bank check or by wire transfer.

                                     SG-24
<PAGE>

Written Requests

     To redeem shares in writing (whether or not represented by certificates), a
shareholder must send the following items to the Transfer Agent, PFPC, Inc.,
P.O. Box 9688, Providence, RI 02940-0926.

(1)  a written request for redemption signed by all registered owners exactly as
     the account is registered on the Transfer Agent's records, including
     fiduciary titles, if any, and specifying the account number and the dollar
     amount or number of shares to be redeemed;

(2)  for certain redemptions described below, a guarantee of all signatures on
     the written request or on the share certificate or accompanying stock
     power, if required, as described under "How to Buy Shares--Signature
     Guarantee";

(3)  any share certificates issued for any of the shares to be redeemed (see
     "Certificated Shares" below); and

(4)  any additional documents which may be required by the Transfer Agent for
     redemption by corporations, partnerships or other organizations, executors,
     administrators, trustees, custodians or guardians, or if the redemption is
     requested by anyone other than the shareholder(s) of record.

     Transfers of shares are subject to the same requirements. A signature
guarantee is not required for a redemption requested by and payable to all
shareholders of record for the account that is to be sent to the address of
record for that account. To avoid delay in redemption or transfer, shareholders
having any questions about these requirements should contact the Transfer Agent
in writing or call the Distributor at 1-800-426-0107 before submitting a
request. Redemption or transfer requests will not be honored until all required
documents have been completed by the shareholder and received by the Transfer
Agent. This redemption option does not apply to shares held in broker "street
name" accounts.  Shareholders whose shares are held in broker "street name"
accounts must redeem through their broker.

     If the proceeds of the redemption (i) are to be paid to a person other than
the record owner, (ii) are to be sent to an address other than the address of
the account on the Transfer Agent's records or (iii) are to be paid to a
corporation, partnership, trust or fiduciary, the signature(s) on the redemption
request and on the certificates, if any, or stock power must be guaranteed as
described above, except that the Distributor may waive the signature guarantee
requirement for redemptions up to $2,500 by a trustee of a qualified retirement
plan, the administrator for which has an agreement with the Distributor.

Telephone Redemptions

     Each Trust accepts telephone requests for redemption of uncertificated
shares, except for investors who have specifically declined telephone redemption
privileges on the account application or elected in writing not to utilize
telephone redemptions. The proceeds of a

                                     SG-25
<PAGE>

telephone redemption will be sent to the record shareholder at his record
address. Changes in account information must be made in a written authorization
with a signature guarantee. See "How to Buy Shares--Signature Guarantee."
Telephone redemptions will not be accepted during the 30-day period following
any change in an account's record address. This redemption option does not apply
to shares held in broker "street name" accounts. Shareholders whose shares are
held in broker "street name" accounts must redeem through their broker.

     By completing an account application, an investor agrees that the
applicable Trust, the Distributor and the Transfer Agent shall not be liable for
any loss incurred by the investor by reason of the Trust accepting unauthorized
telephone redemption requests for his account if the Trust reasonably believes
the instructions to be genuine. Thus, shareholders risk possible losses in the
event of a telephone redemption not authorized by them.  Each Trust may accept
telephone redemption instructions from any person identifying himself as the
owner of an account or the owner's broker where the owner has not declined in
writing to utilize this service.  Each Trust will employ reasonable procedures
to confirm that instructions communicated by telephone are genuine, and may be
liable for any losses due to unauthorized or fraudulent instructions if it fails
to employ such procedures.  Each Trust will require a form of personal
identification prior to acting on a caller's telephone instructions, will
provide written confirmations of such transactions and will record telephone
instructions.

     A shareholder making a telephone redemption should call the Distributor at
1-800-426-0107 and state (i) the name of the shareholder as it appears on the
Transfer Agent's records, (ii) his account number with the Trust, (iii) the
amount to be withdrawn and (iv) the name of the person requesting the
redemption. Usually the proceeds are sent to the investor on the next Trust
business day after the redemption is effected, provided the redemption request
is received prior to the close of regular trading (normally 4:00 p.m., Eastern
time) on the New York Stock Exchange that day. If the redemption request is
received after the close of the New York Stock Exchange, the redemption is
effected on the following Trust business day at that day's net asset value and
the proceeds are usually sent to the investor on the second following Trust
business day.  Each Trust reserves the right to terminate or modify the
telephone redemption service at any time. During times of severe disruptions in
the securities markets, the volume of calls may make it difficult to redeem by
telephone, in which case a shareholder may wish to send a written request for
redemption as described under "Written Requests" above. Telephone
communications may be recorded by the Distributor or the Transfer Agent.

Fund Link Redemptions

     If a shareholder has established Fund Link, the shareholder may redeem
shares by telephone and have the redemption proceeds sent to a designated
account at a financial institution. Fund Link is normally established within 45
days of receipt of a Fund Link application by the Transfer Agent. To use Fund
Link for redemptions, call the Distributor at 1-800-426-0107. Subject to the
limitations set forth above under "Telephone Redemptions," the Distributor, a
Trust and the Transfer Agent may rely on instructions by any registered owner
believed to be genuine and will not be responsible to any shareholder for any
loss, damage or expense arising out of such instructions. Requests received by
the Transfer Agent prior to the close of regular trading (normally 4:00 p.m.,
Eastern time) on the New York Stock Exchange

                                     SG-26
<PAGE>

on a business day will be processed at the net asset value on that day and the
proceeds (less any CDSC) will normally be sent to the designated bank account on
the following business day and received by the bank on the second or third
business day. If the redemption request is received after the close of regular
trading on the New York Stock Exchange, the redemption is effected on the
following business day. Shares purchased by check may not be redeemed through
Fund Link until such shares have been owned (i.e., paid for) for at least 15
days. Fund Link may not be used to redeem shares held in certificated form.

     Changes in bank account information must be made by completing a new Fund
Link application, signed by all owners of record of the account, with all
signatures guaranteed. See "How to Buy Shares--Signature Guarantee." See "How
to Buy Shares--PIMCO Funds Fund Link" for information on establishing the Fund
Link privilege.  Either Trust may terminate the Fund Link program at any time
without notice to its shareholders. This redemption option does not apply to
shares held in broker "street name" accounts.  Shareholders whose shares are
held in broker "street name" accounts must redeem through their broker.

PIMCO Funds Automated Telephone System

     PIMCO Funds Automated Telephone System ("ATS") is an automated telephone
system that enables shareholders to perform a number of account transactions
automatically using a touch-tone telephone. ATS may be used on already-
established Fund accounts after you obtain a Personal Identification Number
(PIN) by calling the special ATS number: 1-800-223-2413.

Purchasing Shares.   You may purchase shares in amounts up to $100,000 by
telephone by calling 1-800-223-2413. You must have established ATS privileges to
link your bank account with the Fund to pay for these purchases.

Exchanging Shares.   With the PIMCO Funds Exchange Privilege, you can exchange
shares automatically by telephone from your Fund Link Account to another PIMCO
Funds account you have already established by calling 1-800-223-2413. Please
refer to "Exchange Privilege" for details.

Redemptions.   You may redeem shares by telephone automatically by calling 1-
800-223-2413 and the Fund will send the proceeds directly to your Fund bank
account. Please refer to "How to Redeem" for details.

Expedited Wire Transfer Redemptions

     If a shareholder has given authorization for expedited wire redemption,
shares can be redeemed and the proceeds sent by federal wire transfer to a
single previously designated bank account. Requests received by a Trust prior to
the close of the New York Stock Exchange will result in shares being redeemed
that day at the next determined net asset value (less any CDSC). Normally the
proceeds will be sent to the designated bank account the following business day.
The bank must be a member of the Federal Reserve wire system. Delivery of the
proceeds of a wire redemption request may be delayed by the applicable Trust for
up to 7 days if the Distributor deems it appropriate under then current market
conditions. Once

                                     SG-27
<PAGE>

authorization is on file with a Trust, such Trust will honor requests by any
person identifying himself as the owner of an account or the owner's broker by
telephone at 1-800-426-0107 or by written instructions. A Trust cannot be
responsible for the efficiency of the Federal Reserve wire system or the
shareholder's bank. Neither Trust currently charges for wire transfers. The
shareholder is responsible for any charges imposed by the shareholder's bank.
The minimum amount that may be wired is $2,500. Each Trust reserves the right to
change this minimum or to terminate the wire redemption privilege. Shares
purchased by check may not be redeemed by wire transfer until such shares have
been owned (i.e., paid for) for at least 15 days. Expedited wire transfer
redemptions may be authorized by completing a form available from the
Distributor. Wire redemptions may not be used to redeem shares in certificated
form. To change the name of the single bank account designated to receive wire
redemption proceeds, it is necessary to send a written request with signatures
guaranteed to PIMCO Funds Distributors LLC, P.O. Box 9688, Providence, RI 02940-
0926. See "How to Buy Shares--Signature Guarantee." This redemption option does
not apply to shares held in broker "street name" accounts. Shareholders whose
shares are held in broker "street name" accounts must redeem through their
broker.

Certificated Shares

     To redeem shares for which certificates have been issued, the certificates
must be mailed to or deposited with the applicable Trust, duly endorsed or
accompanied by a duly endorsed stock power or by a written request for
redemption. Signatures must be guaranteed as described under "How to Buy
Shares--Signature Guarantee." Further documentation may be requested from
institutions or fiduciary accounts, such as corporations, custodians (e.g.,
under the Uniform Gifts to Minors Act), executors, administrators, trustees or
guardians ("institutional account owners"). The redemption request and stock
power must be signed exactly as the account is registered, including indication
of any special capacity of the registered owner.

Automatic Withdrawal Plan

     An investor who owns or buys shares of a Fund having a net asset value of
$10,000 or more may open an Automatic Withdrawal Plan and have a designated sum
of money (not less than $100 per Fund) paid monthly (or quarterly) to the
investor or another person. Such a plan may be established by completing the
appropriate section of the account application or by obtaining an Automatic
Withdrawal Plan application from the Distributor or your broker. If an Automatic
Withdrawal Plan is set up after the account is established providing for payment
to a person other than the record shareholder or to an address other than the
address of record, a signature guarantee is required. See "How to Buy Shares--
Signature Guarantee." Class A, Class B and Class C shares of any Fund are
deposited in a plan account and all distributions are reinvested in additional
shares of the particular class of the Fund at net asset value. Shares in a plan
account are then redeemed at net asset value (less any applicable CDSC) to make
each withdrawal payment. Any applicable CDSC may be waived for certain
redemptions under an Automatic Withdrawal Plan. See "Alternative Purchase
Arrangements--Waiver of Contingent Deferred Sales Charges."

                                     SG-28
<PAGE>

     Redemptions for the purpose of withdrawals are ordinarily made on the
business day preceding the day of payment at that day's closing net asset value
and checks are mailed on the day of payment selected by the shareholder. The
Transfer Agent may accelerate the redemption and check mailing date by one day
to avoid weekend delays. Payment will be made to any person the investor
designates; however, if the shares are registered in the name of a trustee or
other fiduciary, payment will be made only to the fiduciary, except in the case
of a profit-sharing or pension plan where payment will be made to the designee.
As withdrawal payments may include a return of principal, they cannot be
considered a guaranteed annuity or actual yield of income to the investor. The
redemption of shares in connection with an Automatic Withdrawal Plan may result
in a gain or loss for tax purposes. Continued withdrawals in excess of income
will reduce and possibly exhaust invested principal, especially in the event of
a market decline. The maintenance of an Automatic Withdrawal Plan concurrently
with purchases of additional shares of the Fund would be disadvantageous to the
investor because of the CDSC that may become payable on such withdrawals in the
case of Class A, Class B or Class C shares and because of the initial sales
charge in the case of Class A shares. For this reason, the minimum investment
accepted for a Fund while an Automatic Withdrawal Plan is in effect for that
Fund is $1,000, and an investor may not maintain a plan for the accumulation of
shares of the Fund (other than through reinvestment of distributions) and an
Automatic Withdrawal Plan at the same time. The Trust or the Distributor may
terminate or change the terms of the Automatic Withdrawal Plan at any time.

     Because the Automatic Withdrawal Plan may involve invasion of capital,
investors should consider carefully with their own financial advisers whether
the plan and the specified amounts to be withdrawn are appropriate in their
circumstances. The Trust and the Distributor make no recommendations or
representations in this regard.

Redemptions In Kind

     Each Trust agrees to redeem shares of its Funds solely in cash up to the
lesser of $250,000 or 1% of the Fund's net assets during any 90-day period for
any one shareholder. In consideration of the best interests of the remaining
shareholders, each Trust 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 a Fund in lieu of cash. Except for Funds with a tax-efficient
management strategy, it is highly unlikely that shares would ever be redeemed in
kind. When shares are redeemed in kind, the redeeming shareholder should expect
to incur transaction costs upon the disposition of the securities received in
the distribution.


PIMCO Funds

PIMCO Funds Distributors LLC
2187 Atlantic Street
Stamford, CT  06902-6896
1-800-426-0107

                                     SG-29


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