OPPENHEIMER CALIFORNIA MUNICIPAL FUND
N-14AE/A, 2000-08-17
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As filed with the Securities and Exchange Commission on August 17, 2000
--------------------------------------------------------------------------------

Registration No. 33-23566


                                           U.S.    SECURITIES    AND   EXCHANGE
COMMISSION
                                                WASHINGTON, D.C. 20549

                                    FORM N-14


                         REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
/ X /

PRE-EFFECTIVE AMENDMENT NO. 1                         /  X   /

POST-EFFECTIVE AMENDMENT NO. ___                      /     /



                                            OPPENHEIMER CALIFORNIA MUNCIPAL FUND
                 (Exact Name of Registrant as Specified in Charter)


               Two World Trade Center, New York, New York 10048-0203
                    (Address of Principal Executive Offices)

                                  212-323-0200
                         (Registrant's Telephone Number)

                              Andrew J. Donohue, Esq.
                    Executive Vice President and General Counsel
                               OppenheimerFunds, Inc.
               Two World Trade Center, New York, New York 10048-0203
                                  212-323-0256
                      (Name and Address of Agent for Service)


     As soon as practicable after the Registration Statement becomes effective.
                   (Approximate Date of Proposed Public Offering)

                        Title of Securities Being  Registered:  Class A, Class B
and Class C shares

It is proposed  that this filing will become  effective  on  September  28, 2000
pursuant to Rule 488.

No filing fee is due  because of  reliance  on Section  24(f) of the  Investment
Company Act of 1940.


<PAGE>


            CONTENTS OF REGISTRATION STATEMENT

This Registration Statement contains the following pages and documents:

Front Cover
Contents Page
Shareholder Letter
Notice of Shareholder Meeting

Part A

Prospectus for Oppenheimer California Municipal Fund
Proxy Statement for Oppenheimer Main Street Funds, Inc. on behalf of its series,
Oppenheimer Main Street California Municipal Fund

Part B

Statement of Additional Information

Part C

Other Information
Signatures
Exhibits




<PAGE>


                                PRELIMINARY COPY
                 OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
                  6803 South Tucson Way, Englewood, Colorado 80112
                                 1-800-525-7048

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                         TO BE HELD ON OCTOBER 12, 2000

    To the Shareholders of Oppenheimer Main Street California Municipal Fund:

    Notice is  hereby  given  that a  Special  Meeting  of the  Shareholders  of
    Oppenheimer Main Street  California  Municipal Fund ("Main Street California
    Municipal  Fund"), a series of the Oppenheimer Main Street Funds,  Inc. (the
    "Company"), a registered management investment company, will be held at 6803
    South Tucson Way,  Englewood,  Colorado 80112 at 10:00 A.M., Denver time, on
    October 12,  2000,  or any  adjournments  thereof (the  "Meeting"),  for the
    following purposes:

    1. To approve an Agreement and Plan of Reorganization between the Company on
    behalf of its series Main Street  California  Municipal Fund and Oppenheimer
    California   Municipal  Fund   ("California   Municipal   Fund"),   and  the
    transactions   contemplated   thereby,   including   (a)  the   transfer  of
    substantially  all the assets of Main Street  California  Municipal  Fund to
    California  Municipal  Fund in  exchange  for  Class A and Class B shares of
    California Municipal Fund, (b) the distribution of such shares of California
    Municipal Fund to the corresponding Class A and Class B shareholders of Main
    Street  California  Municipal  Fund in complete  liquidation  of Main Street
    California Municipal Fund and (c) the cancellation of the outstanding shares
    of Main Street California Municipal Fund (the "Proposal").

    2.  To act upon such other matters as may properly come before the Meeting.

    Shareholders  of record  at the close of  business  on August  16,  2000 are
    entitled  to notice of, and to vote at, the  Meeting.  The  Proposal is more
    fully  discussed  in the Proxy  Statement  and  Prospectus.  Please  read it
    carefully  before telling us, through your proxy or in person,  how you wish
    your shares to be voted. The Board of Directors of the Company  recommends a
    vote in  favor  of the  Proposal.  WE URGE  YOU TO  SIGN,  DATE AND MAIL THE
    ENCLOSED PROXY PROMPTLY.

    By Order of the Board of Directors,

    Andrew J. Donohue, Secretary
    September 11, 2000
    ----------------------------------------------------------------------
    Shareholders  who do not  expect to attend  the  Meeting  are  requested  to
    indicate  voting  instructions  on the enclosed proxy and to date,  sign and
    return it in the accompanying  postage-paid  envelope.  To avoid unnecessary
    duplicate  mailings,  we ask your cooperation in promptly mailing your proxy
    no matter how large or small your holdings may be.
                                PRELIMINARY COPY
                     COMBINED PROSPECTUS AND PROXY STATEMENT
                              DATED AUGUST 31, 2000

 Acquisition       of the Assets of OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL
                   FUND, a series of Oppenheimer Main Street Funds, Inc.

                By and in exchange for Class A and Class B shares of
                       OPPENHEIMER CALIFORNIA MUNICIPAL FUND

      This combined  Prospectus and Proxy  Statement  solicits  proxies from the
shareholders of Oppenheimer Main Street California  Municipal Fund ("Main Street
California  Municipal  Fund") to be voted at a Special  Meeting of  Shareholders
(the  "Meeting")  to  approve  the  Agreement  and Plan of  Reorganization  (the
"Reorganization  Agreement")  and the  transactions  contemplated  thereby  (the
"Reorganization")  between Main Street Funds,  Inc. (the "Company") on behalf of
Main Street California Municipal Fund and Oppenheimer  California Municipal Fund
("California   Municipal  Fund").  This  combined   Prospectus/Proxy   Statement
constitutes the Prospectus of California  Municipal Fund and the Proxy Statement
of Main Street California  Municipal Fund filed on Form N-14 with the Securities
and  Exchange   Commission   ("SEC").   If  shareholders  vote  to  approve  the
Reorganization  Agreement and the Reorganization,  the net assets of Main Street
California  Municipal  Fund will be acquired  by and in  exchange  for shares of
California  Municipal  Fund.  The  Meeting  will be held at the  offices  of the
Company at 6803 South Tucson Way, Englewood,  Colorado 80112 on October 12, 2000
at 10:00 A.M.  Denver time.  The Board of Directors of the Company is soliciting
these  proxies  on  behalf  of  Main  Street  California  Municipal  Fund.  This
Prospectus/Proxy  Statement  will  first  be sent to  shareholders  on or  about
September 11, 2000.

      If the shareholders vote to approve the  Reorganization  Agreement and the
transaction  is  consummated,  you will  receive  Class A shares  of  California
Municipal  Fund  equal in value to the  value as of the  valuation  date of your
Class A shares of Main Street  California  Municipal  Fund and Class B shares of
California  Municipal  Fund equal in value to the value as of the valuation date
of your Class B shares of Main Street  California  Municipal  Fund.  Main Street
California Fund will then be liquidated.

      California  Municipal  Fund's  investment  objective  is to seek as high a
level of current  income  exempt from  federal and  California  personal  income
taxes,  as  is  available  from  investing  in  municipal  securities,  that  is
consistent  with the  preservation  of capital.  California  Municipal Fund as a
matter of fundamental  policy  invests at least 80% of its assets,  in municipal
securities,  and at  least  65% of its  total  assets  in  California  municipal
securities. California Municipal Fund limits its investments in below investment
grades securities to 25% or less of its total assets.  California Municipal Fund
emphasizes  California  municipal securities with longer term maturities for the
purpose of seeking higher yields.

      This  Prospectus/Proxy  Statement gives information about Class A, Class B
and Class C shares of  California  Municipal  Fund that you should  know  before
investing.  You should retain it for future reference. A Statement of Additional
Information relating to the Reorganization described in this Proxy Statement and
Prospectus,   dated  August 31, 2000  (the  "Prospectus/Proxy  Statement  of
Additional  Information")  has been  filed  with  the  Securities  and  Exchange
Commission  ("SEC")  as part of the  Registration  Statement  on Form  N-14 (the
"Registration  Statement")  and is  incorporated  herein by  reference.  You may
receive a copy by written request to the Transfer Agent or by calling  toll-free
as detailed  above.  The  Prospectus/Proxy  Statement of Additional  Information
includes the following  documents:  (i) Annual Report and Semi-Annual  Report of
California Municipal Fund, as of July 31, 1999 and January 31, 2000; (ii) Annual
Report and  Semi-Annual  Report of Main Street  California  Municipal  Fund,  as
August 31, 1999 and February  29,  2000;  (iii) the  California  Municipal  Fund
Statement  of  Additional  Information;  and  (iv) the  Main  Street  California
Municipal Fund Statement of Additional Information.

      The  Prospectus of California  Municipal  Fund dated  November 22, 1999 is
attached to and  considered  a part of this  Prospectus/Proxy  Statement  and is
intended to provide you with information about California Municipal Fund.

      The  following  documents  have been filed with the SEC and are  available
without charge upon written request to OppenheimerFunds  Services (the "Transfer
Agent") or by calling the  toll-free  number shown above:  (i) a Prospectus  for
Main Street California Municipal Fund, dated December 22, 1999; (ii) a Statement
of Additional  Information  for Main Street  California  Municipal  Fund,  dated
December  22,  1999;  and  (iii)  a  Statement  of  Additional  Information  for
California Municipal Fund, dated November 22, 1999.


Like all mutual funds,  the Securities and Exchange  Commission has not approved
or   disapproved   these   securities  or  passed  upon  the  adequacy  of  this
Prospectus/Proxy  Statement.  Any  representation  to the contrary is a criminal
offense.

Mutual fund shares are not deposits or obligations of, or guaranteed or endorsed
by, any bank,  and are not federally  insured by the Federal  Deposit  Insurance
Corporation,  the Federal  Reserve Board, or any other U.S.  government  agency.
Mutual fund shares  involve  investment  risks  including  the possible  loss of
principal.

This Proxy Statement and Prospectus is dated August 31, 2000.



<PAGE>


                                TABLE OF CONTENTS
                     COMBINED PROSPECTUS AND PROXY STATEMENT

Cover Page                                                              Page
Synopsis
      What am I being asked to vote on?
      What are the general tax consequences of the Transaction?
Comparisons of Some Important Features
      How do the investment objectives and policies of the Funds compare?
      Who manages the Funds?
      What are the fees and expenses of each Fund and those expected after the
            Reorganization?
      Where can I find more financial  information about the Funds? How have the
      Funds performed? What are other key features of the Funds?
            Investment Management and Fees
            Transfer Agency and Custody Services
            Distribution Services
            Purchases, Redemptions, Exchanges and other Shareholder Services
            Dividends and Distributions
      What are the risks of an investment in the California Municipal Fund?
Reasons for the Reorganization
Information about the Reorganization
      How will the  Reorganization  be carried out? Who will pay the expenses of
      the Reorganization? What are the tax consequences of the Reorganization?
      What should I know about  California  Municipal Fund - Class A and Class B
           shares Fund?
      What are  the   capitalizations   of  the   Funds   and  what   might  the
           capitalization be after the Reorganization?
Comparison of Investment Objectives and Policies
      Are   there any significant  differences between the investment objectives
            and strategies of the Funds?
      How do the investment policies of the Funds compare?
            Municipal Securities
            Ratings of Municipal Securities the Fund Buys
            Special Credit Risks of Lower-Grade Securities
            Municipal Lease Obligations
            Other Investment Strategies
      What are the fundamental  investment  restrictions of the Funds?  What are
      the risk factors associated with investment in the Funds?
            Credit Risk
            Interest Rate Risk
            Risks of Non-Diversification
            Risks in Using Derivative Investments
            Special Credit Risks of Lower-Grade Securities
     How do the Account Features and Shareholder Services for the Funds Compare?
            Investment Management
            Distribution
            Purchases and Redemptions
            Shareholder Services
            Dividends and Distributions
Voting Information
      How many votes are necessary to approve the Reorganization  Agreement? How
      do I ensure my vote is accurately recorded?
      Can I revoke my proxy?
      What other  matters will be voted upon at the Meeting?  Who is entitled to
      vote? What other solicitations will be made?
      Are there appraisal rights?
Information about California Municipal Fund
Information about Main Street California Municipal Fund
Principal Shareholders
Exhibit A - Agreement and Plan of Reorganization by and between Oppenheimer Main
Street Funds, Inc., on behalf of its series,  Oppenheimer Main Street California
Municipal Fund, and Oppenheimer California Municipal Fund Enclosures

- Prospectus of Oppenheimer California Municipal Fund, dated November 22, 1999

<PAGE>


                                    SYNOPSIS

      This is only a  summary  and is  qualified  in its  entirety  by the  more
detailed  information   contained  in  or  incorporated  by  reference  in  this
Prospectus  and Proxy  Statement and by the  Reorganization  Agreement  which is
attached as Exhibit A. Shareholders  should carefully review this Prospectus and
Proxy  Statement  and the  Reorganization  Agreement in their  entirety  and, in
particular,   the  current   Prospectus  of  California   Municipal  Fund  which
accompanies  this Prospectus and Proxy  Statement and is incorporated  herein by
reference.

What am I being asked to vote on?


      OppenheimerFunds,  Inc.  (the  "Manager")  proposed  to the  Board of Main
Street Funds,  Inc., a reorganization of Main Street  California  Municipal Fund
with  and  into   California   Municipal  Fund  for  the  purpose  of  providing
shareholders  with a  stronger  fund.  The  reorganization  will  also  serve to
consolidate the Oppenheimer funds California municipal bond product line. If the
Reorganization is approved, shareholders will be in a larger fund with virtually
identical  investment  objective  and  policies.  In  addition,   the  portfolio
management of the surviving  California  Municipal Fund will be the same as that
who manages the Main Street California Municipal Fund. Because of the relatively
low demand for shares of Main Street California Municipal Fund, we do not expect
such Fund to grow and recommend shareholders approve this Reorganization.


      By approving the  reorganization,  shareholders of Main Street  California
Municipal  Fund will be  accepting  a Rule  12b-1  service  plan for the Class A
shares of the California  Municipal Fund because of the existence of such a plan
on the Class A shares of the surviving  California  Municipal  Fund.  Currently,
shareholders of Main Street  California  Municipal Fund do not have a Rule 12b-1
service plan applicable to their Class A shares.


      Main  Street  California  Municipal  Fund was  primarily  created  for the
purpose of selling its shares  through  various  financial  institutions  in the
State of  California.  As a result of this  particular  structure,  Main  Street
California  Municipal Fund was not established with a service fee on its Class A
shares. It is also the only open-end,  non-money market retail  Oppenheimer fund
not to  have a Class A  share  service  plan.  As a  result  of  changes  in the
marketing  and selling of fund  shares,  the absence of a service fee on Class A
shares adversely affects sales of Main Street California Municipal Fund. Without
a service plan on Class A shares,  dealers may lack the appropriate incentive to
properly  service  fund shares due to the absence of  compensation  received for
providing certain administrative and shareholder services.  Under an Oppenheimer
fund Class A service plan, the  Distributor  will use the fees its receives from
the particular fund to pay brokers, dealers and other financial institutions for
personal services and account maintenance  services provided for their customers
who hold Class A shares of an Oppenheimer  fund. A Class A share service plan in
the OppenheimerFunds complex permits payments to the Distributor at a rate of up
to 0.25% of the average annual net assets of Class A Shares of such fund.

      A reorganization  of Main Street  California  Municipal Fund with and into
California  Municipal  Fund is  recommended  by the Board based on the fact that
both  Funds  are  essentially  the  same  investment  with  the  same  portfolio
management  team,  objective and investment  policies.  The Board also notes the
importance  of service  plans on Class A shares for the delivery of  shareholder
services. Therefore, had the proposed reorganization was undertaken, the Manager
would have  proposed  the  adoption of a service plan for Class A shares of Main
Street California Municipal Fund for Board and shareholder approval.


      The Board  considered the fact that the  reorganization  will increase the
expense  ratio  experienced  by  shareholders  of Class A shares of Main  Street
California Municipal Fund. The Board noted that the lower expense ratio for Main
Street California Municipal Fund Class A shares was largely due to the Manager's
previous voluntary waiver of its investment  management fee and the absence of a
service  fee.  Especially  without  a Rule  12b-1  Service  Plan for its Class A
shares,  the Manager and Board expect Main Street  California  Municipal Fund to
continue  to  experience  net  redemptions.  With the  removal of the  Manager's
voluntary  fee  waiver  in  February  2000  and  the  proposal  by  the  Manager
(regardless of this reorganization) to adopt a Rule 12b-1 Service Plan for Class
A shares,  the  Board  considered  that the  expense  ratios of the Funds  would
essentially be the same. The Board also considered that the Reorganization would
be a  tax-free  reorganization,  and that no sales  charge  would be  imposed in
effecting the Reorganization.

      At a meeting  held on February  29,  2000,  the Board of  Directors of the
Company  on  behalf  of  Main  Street  California   Municipal  Fund  approved  a
reorganization transaction that will, if approved by shareholders, result in the
transfer  of the  net  assets  of  Main  Street  California  Municipal  Fund  to
California  Municipal  Fund,  in  exchange  for an  equal  value  of  shares  of
California  Municipal Fund. The shares of California Municipal Fund will then be
distributed  to Main Street  California  Municipal  Fund  shareholders  and Main
Street  California  Municipal  Fund  will  be  liquidated.  As a  result  of the
Reorganization,  you will cease to be a  shareholder  of Main Street  California
Municipal Fund and will become a shareholder of California  Municipal Fund. This
exchange will occur on the Closing Date of the Reorganization.

      Approval of the Reorganization means your shares of Main Street California
Municipal  Fund will be  exchanged  for an equal  value of shares of  California
Municipal  Fund.  You will receive Class A shares of California  Municipal  Fund
equal in value to the value as of the  valuation  date of your Class A shares of
Main Street California Municipal Fund and Class B shares of California Municipal
Fund equal in value to the value as of the valuation date of your Class B shares
of Main Street California  Municipal Fund. The shares you receive will be issued
at net  asset  value  without  a sales  charge or the  payment  of a  contingent
deferred sales charge ("CDSC") although if your shares of Main Street California
Municipal Fund are subject to a CDSC, your California Municipal Fund shares will
continue to be subject to the CDSC  applicable to your shares.  However,  former
Class A shareholders of Main Street  California  Municipal Fund whose shares are
represented  by  outstanding  share  certificates  will not be allowed to redeem
shares of California Municipal Fund until the certificates have been returned.

      For the reasons set forth in the "Reasons for the Reorganization" section,
the Board of Main  Street  California  Municipal  Fund has  determined  that the
Reorganization  is in the best  interests  of the  shareholders  of Main  Street
California  Municipal  Fund. The Board concluded that no dilution in value would
result to shareholders of Main Street  California  Municipal Fund as a result of
the Reorganization.

                  THE BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE
TO APPROVE THE AGREEMENT AND PLAN OF REORGANIZATION

What are the general tax consequences of the Transaction?

      It is expected that shareholders of Main Street California  Municipal Fund
who are U.S. citizens will not recognize any gain or loss for federal income tax
purposes,  as a result of the exchange of their shares for shares of  California
Municipal  Fund.  You should,  however,  consult your tax advisor  regarding the
effect, if any, of the Reorganization in light of your individual circumstances.
You should also consult your tax advisor about state and local tax consequences.
For further information about the tax consequences of the Reorganization, please
see the "Information About the  Reorganization--What are the tax consequences of
the Reorganization?"

                     COMPARISONS OF SOME IMPORTANT FEATURES

How do the investment objectives and policies of the Funds compare?

      Main Street California  Municipal Fund and California  Municipal Fund have
virtually identical  investment  objectives.  Each Fund seeks as high a level of
current income exempt from federal and California  personal income taxes that is
consistent with the preservation of capital.

      In seeking their investment  objectives,  Main Street California Municipal
Fund and  California  Municipal  Fund utilize a similar  investing  strategy and
invest primarily in municipal securities. Main Street California Municipal Fund,
as a matter of fundamental  investment policy, invests at least 80% of its total
assets in  California  municipal  securities.  California  Municipal  Fund, as a
fundamental  investment policy,  invests at least 80% of its assets in municipal
securities,  and at  least  65% of its  total  assets  in  California  municipal
securities.  As of March 31, 2000,  Main Street  California  Municipal  Fund had
98.16% of its total  assets  invested in  California  municipal  securities  and
California  Municipal Fund had 98.03% of its total assets invested in California
municipal securities.

      With respect to below investment grade  investments  (referred to as "junk
bonds"),  both Funds limit such investments to 25% or less of total assets,  and
Main Street  California  Municipal Fund limits its holding of unrated  municipal
securities to 20% of total assets. "Investment grade" securities are those rated
within the first four (4)  highest  rating  categories  of  Moody's,  Standard &
Poor's,  Fitch  or  Duff  &  Phelps  or  another  nationally  recognized  rating
organization,  or if unrated,  judged by the Manager to be  comparable  to rated
investment grade  securities.  Rating  categories are specifically  described in
each Fund's Statement of Additional Information.  Both Funds currently emphasize
investment in municipal  securities with long-term maturities for the purpose of
seeking higher yields.

Who Manages the Funds?

      The day-to-day  management of the business and affairs of each Fund is the
responsibility of the Manager. Main Street California Municipal Fund is a series
of the Company,  which was  organized  in April 1987 as a Maryland  corporation.
Main Street California Municipal Fund is a non-diversified, open-end mutual fund
which commenced  operations on May 18, 1990. The Fund is governed by Articles of
Incorporation  and By-Laws and is under the  direction  of a Board of  Directors
which is responsible for protecting the interests of  shareholders.  The Company
is located at 6803 South Tucson Way, Englewood, Colorado 80112.

      California Municipal Fund was organized as a Massachusetts  business trust
in July 1988 and is also a non-diversified, open-end mutual fund. It is governed
by a  Declaration  of Trust and By-Laws and is under the direction of a Board of
Trustees  which is responsible  for  protecting  the interests of  shareholders.
California  Municipal  Fund is located at Two World Trade Center,  New York, New
York 10048-0203

      The Manager,  located at Two World Trade Center, New York, New York 10048,
acts as  investment  advisor  to both  Funds.  The  portfolio  management  group
consisting  of the  portfolio  manager  and a team of  analysts  and  investment
researchers  is also the same for each Fund and will  continue in this  capacity
for the surviving California Municipal Fund.

      Additional information about the Funds and the Manager is set forth below.
There are certain  differences  between Maryland  corporations and Massachusetts
business trusts. Such differences,  as well as additional  information about the
Funds  and  the  Manager,  is set  forth  below  in  "Comparison  of  Investment
Objectives and Policies."

What  are the fees and  expenses  of each  Fund and  those  expected  after  the
Reorganization?

      Main Street California  Municipal Fund and California  Municipal Fund each
pay  a  variety  of  expenses   directly  for   management   of  their   assets,
administration,  distribution of their shares and other services. Those expenses
are  subtracted  from each Fund's assets to calculate the Fund's net asset value
per share.  Shareholders pay these expenses  indirectly.  Shareholders pay other
expenses directly,  such as sales charges and account transaction  charges.  The
following  tables are provided to help you  understand  and compare the fees and
expenses of investing in shares of Main Street  California  Municipal  Fund with
the fees and expenses of investing in shares of California  Municipal  Fund. The
pro forma expenses of the surviving California Municipal Fund show what the fees
and expenses are expected to be after giving effect to the  Reorganization.  All
amounts  shown are a  percentage  of net  assets of each  class of shares of the
Funds.


<PAGE>


PRO FORMA FEE TABLE FOR MAIN STREET CALIFORNIA MUNICIPAL FUND
                         AND CALIFORNIA MUNICIPAL FUND+


--------------------------------------------------------------------------------
                   Main Street       California         Pro Forma Surviving
                  California        Municipal Fund     California Municipal Fund
                   Municipal Fund    Class A Shares     Class A shares
                   Class A shares
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Shareholder
Transaction
Expenses (charges
paid directly
from a
shareholder's
investment)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Maximum Sales
  Charge (Load)    -----------------       4.75%                   4.75%
  on purchases           4.75%
  (as a  %  of
  offering price)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Maximum
  Deferred Sales         None1             None1                   None1
  Charge (Load)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Annual Fund
Operating
Expenses (as a
percentage of
average daily net
assets)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Management Fees2       0.55%             0.56%                   0.54%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Distribution
  and/or Service         None              0.24%                   0.24%
  (12b-1) Fees
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Other Expenses         0.11%             0.11%                   0.10%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Total Fund             0.66%             0.91%                   0.88%
  Operating
  Expenses
--------------------------------------------------------------------------------



-------------------------------------------------------------------------------
                   Main Street       California         Pro Forma Surviving
                  California        Municipal Fund     California Municipal Fund
                   Municipal Fund    Class B Shares     Class B shares
                   Class B shares
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Shareholder
Transaction
Expenses (charges
paid directly
from a
shareholder's
investment)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Maximum Sales
  Charge (Load)          None               None                   None
  on purchases
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Maximum
  Deferred Sales          5%3               5%3                    5%3
  Charge (Load)
  (as a % of the
  lower of the
  original
  offering price
  or redemption
  proceeds)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Annual Fund
Operating
Expenses (as a
percentage of
average daily net
assets)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Management Fees2       0.55%             0.56%                  0.54%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Distribution
  and/or Service         1.00%             1.00%                  1.00%
  (12b-1) Fees
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Other Expenses         0.11%             0.11%                  0.10%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
  Total Fund             1.66%             1.67%                  1.64%
  Operating
  Expenses
--------------------------------------------------------------------------------
Note:  Expenses may vary in future years. "Other expenses include transfer agent
fees,  custodial  expenses,  and  accounting  and legal  expenses the fund pays.
+Information  provided  is  for  Main  Street  California  Fund  and  California
Municipal Fund for the 12-month period ended March 31, 2000.
1A 1% contingent  deferred  sales charge may apply to redemptions of investments
of $1 million or more of Class A shares.  See "How to Buy Shares" in each Fund's
Prospectus.
2The Management  Fees above show the maximum rate under the investment  advisory
agreement and do not reflect a voluntary  undertaking by the Manager that was in
effect  during the last fiscal  year,  which  limited the  management  fees to a
maximum  annual  rate of  0.40%.  As a result  of that fee  waiver,  the  actual
management  fee rate for both classes  during the fiscal year ended  8/31/99 was
0.40% and actual total operating expenses were 0.51% and 1.52% of average annual
net  assets,  respectively,  for Class A and Class B. The Manager  withdrew  the
voluntary waiver on April 1, 2000.
3Applies to redemptions in first year after  purchase.  The contingent  deferred
sales charge declines to 1% in the sixth year and is eliminated after that.


      The 12b-1 fees for Class A shares of California Municipal Fund are service
plan fees which are a maximum  of 0.25% of average  annual net assets of Class A
shares.  The  12b-1  fees for  Class B shares  of both  Main  Street  California
Municipal  Fund and for Class B and C shares of  California  Municipal  Fund are
Distribution  and Service Plan fees which  include a service fee of 0.25% and an
asset-based  sales charge of 0.75%. The Manager,  effective January 2000, agreed
to limit its investment  management fee on California Municipal Fund to 0.55% of
average net assets.

Examples

      These  examples  below  are  intended  to help  you  compare  the  cost of
investing in each Fund and the proposed  surviving  California  Municipal  Fund.
These  examples  assume an annual  return for each  class of 5%,  the  operating
expenses described above and reinvestment of your dividends and distributions.

      Your actual costs may be higher or lower  because  expenses will vary over
time.  For each  $10,000  investment,  you  would  pay the  following  projected
expenses if you sold your shares after the number of years shown.

12 Months Ended 3/31/00

                      Main Street California Municipal Fund
--------------------------------------------------------------------------------
If shares are redeemed:   1 year        3 years         5 years        10 years1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $539            $676            $   825        $1,258
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $669            $823            $1,102         $1,452
--------------------------------------------------------------------------------

                      Main Street California Municipal Fund
--------------------------------------------------------------------------------
If    shares    are   not 1 year        3 years         5 years        10 years1
redeemed:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $539            $676            $825           $1,258
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $169            $523            $902           $1,452
--------------------------------------------------------------------------------

                            California Municipal Fund
--------------------------------------------------------------------------------
If shares are redeemed:   1 year        3 years         5 years        10 years1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $563            $751            $   955        $1,541
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $670            $826            $1,107         $1,588
--------------------------------------------------------------------------------

                            California Municipal Fund
--------------------------------------------------------------------------------
If    shares    are   not 1 year        3 years         5 years        10 years1
redeemed:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $563            $751            $955           $1,541
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $170            $526            $907           $1,588
--------------------------------------------------------------------------------

                   Pro Forma Surviving California Municipal Fund
--------------------------------------------------------------------------------
If shares are redeemed:   1 year        3 years         5 years        10 years1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $561            $742            $   939`       $1,508
-------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $667            $817            $1,092         $1,554
--------------------------------------------------------------------------------

                   Pro Forma Surviving California Municipal Fund
--------------------------------------------------------------------------------
If    shares    are   not 1 year        3 years         5 years        10 years1
redeemed:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A                   $561            $742            $939           $1,508
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B                   $167            $517            $892           $1,544
--------------------------------------------------------------------------------
In the first example,  expenses include the initial sales charge for Class A and
the  applicable  Class B or Class C contingent  deferred  sales  charge.  In the
second example,  the Class A expenses include the sales charge,  but Class B and
Class C expenses do not include the contingent deferred sales charges. 1 Class B
expenses  for years 7 through 10 are based on Class A  expenses,  since  Class B
shares automatically convert to Class A after 6 years.

Where can I find more financial information about the Funds?

      Performance information for both California Municipal Fund and Main Street
California  Municipal  Fund is set  forth in each  Fund's  Prospectus  under the
section "The Fund's Past  Performance."  California  Municipal Fund's Prospectus
accompanies  this  Prospectus/Proxy  Statement  and is  incorporated  herein  by
reference.

      The  financial  statements  of California  Municipal  Fund and  additional
information with respect to the Fund's  performance  during the past fiscal year
(and the most recent six month  semi-annual  period),  including a discussion of
factors that materially affected its performance and relevant market conditions,
is set forth in California Municipal Fund's Annual and Semi-Annual Reports dated
as of July 31, 1999 and January 31, 2000, respectively,  that is included in the
Statement of Information and incorporated  herein by reference.  These documents
are available upon request.  See section entitled  "Information About California
Municipal  Fund." The financial  statement of Main Street  California  Municipal
Fund and additional  information with respect to the Fund's  performance  during
the past  fiscal  year  (and the most  recent  six  month  semi-annual  period),
including a discussion of factors that  materially  affected its performance and
relevant market  conditions,  is set forth in Main Street  California  Municipal
Fund's Annual and  Semi-Annual  Reports dated as of August 31, 1999 and February
29, 2000,  respectively,  that are included in the Statement of Information  and
incorporated  herein by reference.  These  documents are available upon request.
See section entitled  "Information About Main Street California Municipal Fund."
Pro forma  financial  statements for the period August 1, 1999 through March 31,
2000 reflecting  California Municipal Fund after the Reorganization are included
in the Statement of Additional Information and incorporated by reference.

How have the Funds performed?

      Past  performance  information  for  each  Fund  is  set  forth  in  their
respective Prospectus as follows: (i) a bar chart detailing annual total returns
of Class A shares of each Fund as of December 31st for each of the full calendar
years since such Fund's  inception;  and (ii) a table  detailing how the average
annual total returns of each Fund's Class A and Class B shares  compare to those
of the Lehman Brothers  Municipal Bond Index, a broad-based  market index.  Past
performance does not necessarily indicate how a fund will perform in the future.

      Average  annual total  returns for the Funds for the period ended June 30,
2000 are as follows:

----------------------------------------------------------------------
Fund                            1-year      5-year      10-year/Life
----------------------------------------------------------------------
----------------------------------------------------------------------
Main     Street      California   (4.42)%      4.49%        6.17%
Municipal    Fund    Class    A
(inception 5/18/90)
----------------------------------------------------------------------
----------------------------------------------------------------------
Main     Street      California   (5.33)%      4.13%        3.74%
Municipal    Fund    Class    B
(inception 10/29/93)
----------------------------------------------------------------------
----------------------------------------------------------------------
Lehman Brothers  Municipal Bond    3.25%       5.88%        7.06%
Index (from 12/31/88)
----------------------------------------------------------------------
----------------------------------------------------------------------
California    Municipal    Fund   (5.30)%      4.00%        5.79%
Class A (inception 11/3/88)
----------------------------------------------------------------------
----------------------------------------------------------------------
California    Municipal    Fund   (6.14)%      3.89%        4.08%
Class B (inception 5/1/93)
----------------------------------------------------------------------
Total returns include  changes in share price and  reinvestment of dividends and
capital gains distributions in a hypothetical  investment for the periods shown.
An explanation of the different  performance  calculations  is set forth in each
Fund's Prospectus and Statement of Additional  Information.  Each Fund's average
annual total return includes the applicable sales charge for Class A and Class B
shares:  for Class A, the current  maximum initial sales charge is 4.75% and for
Class B, the  contingent  deferred  sales charges is 5% (1-year) and 1% (5 years
and life of class).  Because Class B shares of California Municipal Fund convert
to Class A shares 72 months after purchase, Class B "life-of-class"  performance
does not include any  contingent  deferred  sales charge on redemption  and uses
Class A performance for the period after conversion.

      The graphs that  follow show the  performance  of a  hypothetical  $10,000
investment  in each  class of shares of  California  Municipal  Fund held  until
December 31, 1999. In the case of Class A shares, performance is measured over a
10-year period. In the case of Class B shares,  performance is measured from the
inception  of  the  class  on May 1,  1993.  In the  case  of  Class  C  shares,
performance  is measured  from  inception of the class on November 1, 1995.  The
Fund's performance reflects the deduction of the maximum initial sales charge on
Class A shares, the applicable  contingent  deferred sales charge on Class B and
Class  C  shares,   and   reinvestment   of  all   dividends  and  capital  gain
distributions.  California  Municipal  Fund's  performance  is  compared  to the
performance of the Lehman Brothers Municipal Bond Index, an unmanaged index of a
broad range of  investment-grade  municipal  bonds that is widely  regarded as a
measure of the  performance  of the general  municipal  bond market  exempt from
federal tax but  generally not state or local income  taxes.  Index  performance
reflects  the  reinvestment  of  dividends  but does not  consider the effect of
capital  gains or  transaction  costs,  and none of the data in the graphs  that
follow  shows the  effect of taxes.  While  index  comparisons  may be useful to
provide a benchmark for the Fund's performance, it must be noted that the Fund's
investments are not limited to the investments in the Index.

Class A Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class A) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]


Oppenheimer California              Lehman Brothers Municipal
Municipal Fund Class A              Bond Index
11.03.88    9525                          10000
12.31.88    9661                          10010
12.31.89          10783                         11090
12.31.90          11470                         11898
12.31.91          12724                         13343
12.31.92          13777                         14519
12.31.93          15604                         16302
12.31.94          14279                         15460
12.31.95          17100                         18158
7.31.961          17158                         18241
7.31.97           19063                         20111
7.31.98           20142                         21316
7.31.99           20463                         21929

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class AShares of the Fund at 7/31/992
1 Year  -3.24%        5 Year  5.42%         10 Year  6.40%


Class B Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class B) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]

Oppenheimer California              Lehman Brothers Municipal
Municipal Fund Class B              Bond Index
5.3.93            10000                         10000
12.31.93          10656                         10718
12.31.94          9656                          10164
12.31.95          11486                         11938
7.31.961          11474                         11993
7.31.97           12651                         13222
7.31.98           13267                         14015
7.31.99           13375                         14418

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class B Shares of the Fund at 7/31/993
1 Year  -4.02%        5 Year  5.32%         Life  4.77%

Class C Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class C) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]

Oppenheimer California              Lehman Brothers Municipal
Municipal Fund Class C              Bond Index
11.1.95           10000                         10000
12.31.95          10290                         10264
7.31.961    10271                         10310
7.31.97           11324                         11367
7.31.98           11876                         12049
7.31.99           11963                         12395

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class CShares of the Fund at 7/31/994
1 Year  -0.24%        Life  4.90%

Total returns and the ending  account  values in the graphs show change in share
value and include reinvestment of all dividends and capital gains distributions.
The performance  information for the Lehman Brothers Municipal Bond Index in the
graphs  begins on 10/31/88  for Class A,  4/30/93 for Class B and  10/31/95  for
Class C. Past  performance is not predictive of future  performance.  Graphs are
not drawn to the same scale.
---------------------------------
1 The Fund changed its fiscal year-end from December 31 to July 31.
2 The average annual total returns are shown net of the applicable 4.75%
  maximum initial sales charge.
3 Class B shares of the Fund were first publicly offered on 5/3/93.  The average
  annual total returns are shown net of the applicable 5% (1-year) and 1% (since
  inception)  contingent deferred sales charges. The ending account value in the
  graph is net of the applicable 1% contingent deferred sales charge.
4 Class C shares of the Fund were first publicly offered on 11/1/95.  The 1-year
  period is shown net of the applicable 1% contingent deferred sales charge.


What are other key features of the Funds?

      The description of certain key features of the Funds below is supplemented
by each Fund's  Prospectus  and Statement of Additional  Information,  which are
incorporated herein by reference.

      Investment  Management  and Fees The  Manager  manages  the assets of both
Funds and  makes  their  respective  investment  decisions.  Both  Funds  obtain
investment  management  services  from the  Manager  according  to the  terms of
management agreements that are substantially the same except for fee rates.

      Main  Street  California  Municipal  Fund  pays  a  management  fee at the
following annual rate: 0% when net assets are less than $25 million;  0.15% when
net assets are $25  million  or more but less than $50  million;  0.25% when net
assets are $50 million or more but less than $75 million;  0.40% when net assets
are $75  million or more but less than $100  million;  and 0.55% when net assets
are $100  million or more.  Additionally,  the  Manager  through  April 1, 2000,
voluntarily limited its fees to 0.40% of average annual net assets if the fund's
assets were $100 million or more.  That  voluntary  waiver was  discontinued  on
April 1, 2000. With the voluntary limitation that was in place during the fund's
last fiscal year ended August 31, 1999,  the fund's  management fee was 0.40% of
average annual nets assets.  Without that voluntary  waiver,  the management fee
currently is 0.55%. The investment advisory agreement for the fund does not have
any provisions  that would decrease the management fee rate as the assets of the
fund grow.

      Under its management agreement, California Municipal Fund pays the Manager
a management  fee equal to an annual rate of:  0.60% of the first $200  million,
0.55% of the next $100  million,  0.50% of the next $200  million,  0.45% of the
next $250  million,  0.40% of the next $250 million and 0.35% of average  annual
net assets in excess of $1 billion.  California  Municipal Fund's management fee
for the year ended July 31, 1999, was 0.55% of the average annual net assets for
each class of shares.

      Effective upon the Closing of the Reorganization,  the management fee rate
for  California  Municipal  Fund is  expected to be 0.54% based on assets of the
Fund  as of  March  31,  2000.  Under  the  investment  advisory  agreement  for
California  Municipal Fund, the management fee for the combined fund would be at
a reduced rate if the assets of the combined fund significantly increased.

      For a detailed description of each Fund's investment management agreement,
see section entitled "Comparison of Investment  Objectives and Policies - How do
the Account Features and Shareholder Services for the Funds Compare?"

      Transfer  Agency and  Custody  Services - Both Funds  receive  shareholder
accounting and other  clerical  services from  OppenheimerFunds  Services in its
capacity as transfer  agent and dividend  paying agent.  It acts on an "at-cost"
basis.   The  terms  of  the  transfer  agency  agreement  for  both  Funds  are
substantially the same.

      Citibank,  N.A.  located at 399 Park  Avenue,  New York,  New York acts as
custodian of the securities and other assets of California  Municipal  Fund. The
Bank of New York  located  at One  Wall  Street,  New  York,  New  York  acts as
custodian of the securities and other assets of Main Street California Municipal
Fund.

      Distribution   Services  -   OppenheimerFunds   Distributor,   Inc.   (the
"Distributor") acts as the principal underwriter in a continuous public offering
of shares of both  Funds,  but is not  obligated  to sell a  specific  number of
shares.  California Municipal Fund has also adopted a Service Plan and Agreement
under Rule 12b-1 for its Class A shares that  compensates  dealers for providing
certain shareholder services at an annual rate up to 0.25% of average net assets
of Class A shares of the Fund. Main Street  California  Municipal Fund currently
does not have a Class A  Service  Plan and  Agreement.  Main  Street  California
Municipal  Fund has a  Distribution  and  Service  Plan under Rule 12b-1 for its
Class B shares that  compensates the Distributor for services in connection with
the  distribution  and/or  servicing  of Class B shares.  Under this Plan,  Main
Street  California  Municipal Fund pays the  Distributor  an  asset-based  sales
charge  at an  annual  rate up to 0.75% of net  assets  on its  Class B  shares.
California Municipal Fund has also adopted a Distribution and Service Plan under
Rule  12b-1  for its  Class B shares  to  compensate  dealers  for  services  in
connection  with  distribution.  Under this Plan, the California  Municipal Fund
pays the  Distributor  an  asset-based  charge at an annual rate of 0.75% of net
assets on its Class B shares,  whether  distribution  expenses  are more or less
than the amounts  paid by the Fund under the Plan during the period.  Both Funds
also pay an annual  service  fee of 0.25% of net assets on its Class B shares to
the Distributor.  The Distributor then uses these fees to compensate dealers for
providing  personal services and maintaining  shareholder  accounts.  Over time,
California Municipal Fund under its Plan may pay greater  distribution  expenses
than Main Street California Municipal Fund.

      For a detailed description of each Fund's  distribution-related  services,
see section entitled "Comparison of Investment  Objectives and Policies - How do
the Account Features and Shareholder Services for the Funds Compare?"

      Purchases,  Redemptions,  Exchanges and other Shareholder  Services - Both
Funds have the same  requirements and restrictions in connection with purchases,
redemptions and exchanges.  In addition, each Fund also offers the same level of
shareholder   services.   More   detailed   information   regarding   purchases,
redemptions,  exchanges  and  shareholder  services  can be  found  below in the
section  "Comparison of Investment  Objectives and Policies - How do the Account
Features and Shareholder Services for the Funds Compare?"

      Dividends and Distributions - Both Funds declare dividends  separately for
each class of shares from net  tax-exempt  income and/or net  investment  income
each regular  business day and pay those dividends to shareholders  monthly on a
date selected by the Boards of each Fund.  Daily  dividends will not be declared
or paid on newly-purchased shares until Federal Funds are available to the Funds
from the purchase payment for those shares.

      For a  detailed  description  of  each  Fund's  policy  on  dividends  and
distribution,  see section  entitled  "Comparison  of Investment  Objectives and
Policies - How do the Account  Features and  Shareholder  Services for the Funds
Compare?"

What are the risks of an investment in the California Municipal Fund?

      As with most  investments,  investments  in California  Municipal Fund and
Main Street California  Municipal Fund involve risks.  There can be no guarantee
against loss  resulting  from an investment in either Fund, nor can there be any
assurance  that either Fund will  achieve its  investment  objective.  The risks
associated  with an  investment  in each  Fund are  similar  and  include  risks
associated with tax-exempt and other fixed income investments generally, such as
interest rate and credit risks.  There are,  however,  some  distinctions in the
investment  programs of  California  Municipal  Fund and Main Street  California
Municipal  Fund,  such  as  the  variety  of  permitted  investments  and  risks
associated with such investments as measured by securities ratings.

      For more information  about the risks of the Funds, see "What are the risk
factors associated with investments in the Funds?" under the heading "Comparison
of Investment Objectives and Policies."


                         REASONS FOR THE REORGANIZATION


      The Company was originally  established to market its series funds through
various financial  institutions in the State of California.  As a result of this
unique  structure,  Main  Street  California  Municipal  Fund did not  provide a
service fee on its Class A shares.  As a result of changes in the  marketing and
selling of fund shares, the absence of a service plan for Class A shares of Main
Street  California  Municipal  Fund may  adversely  impacts  sales and  services
received by shareholders. The ability to effectively market and sell fund shares
through  Oppenheimer funds  distribution  channels  generally requires a Service
Plan on Class A shares.  The Manager believes that the absence of a service plan
for Class A shares of Main Street California  Municipal Fund inhibits fund sales
because of the lack of dealer  compensation in connection with providing certain
shareholder services.

       Under  a Class  A  service  plan  in the  OppenheimerFunds  complex,  the
Distributor  uses the fees it receives  from a fund to pay brokers,  dealers and
other  financial  institutions  for personal  services  and account  maintenance
services  provided by such dealers to their  customers.  The  services  include,
among  others,   answering  customer  inquiries  about  a  fund,   assisting  in
establishing  and  maintaining  accounts in a fund,  making a fund's  investment
plans  available  and providing  other  services at the request of a fund or the
Distributor.  The  Distributor  accordingly  makes  payments  to  these  dealers
quarterly at an annual rate not to exceed 0.25% of the average annual net assets
consisting  of  Class A  shares  held in the  accounts  of the  dealer  or their
customers.

      The Manager recommended a combination of Main Street California  Municipal
Fund with  California  Municipal  Fund  based on the fact  that  both  Funds are
essentially  the  same  investment  with the same  portfolio  management  group,
objective and investment  policies.  The Manager also asserted the importance of
its service plans on Class A shares for the efficient  distribution and delivery
of  shareholder  services.  It is the  belief  of the  Manager  that in order to
effectively provide certain  administrative and shareholder  services, a service
plan on Class A shares  is  essential.  Without  a  service  plan,  the  Manager
believes sales of fund shares will suffer  because  dealers will be less willing
to sell those shares without  appropriate  compensation.  This is largely due to
the fact that mutual fund  distribution  has changed  making Rule 12b-1  service
plans  important  for  offering  fund  shares in a variety  of new  distribution
channels.  Therefore,  the Manager indicated that were the reorganization not to
be  proposed,  a  service  plan on  Class A  shares  of Main  Street  California
Municipal Fund would be proposed for Board and shareholder approval.

      The Board of Directors of the Company, on behalf of Main Street California
Municipal Fund,  recommend  shareholders  approve the Reorganization in order to
combine  Main  Street  California  Municipal  Fund  with the  larger  California
Municipal  Fund.  Although  the  Board  considered  alternatives,   including  a
rejection of the proposal,  it concluded that this reorganization is in the best
interests of shareholders and the Fund. Because of the relatively low demand for
Main Street California  Municipal Fund, the Manager  recommended to the Board of
Directors of Main Street  California  Municipal  Fund that its assets be sold to
the larger  California  Municipal  Fund.  The Board  reasoned that  shareholders
should notice very little,  if any,  investment  and/or  operational  difference
between the Funds because their  investment  objectives are virtually  identical
with substantially similar policies, managed by the same portfolio manager.

      The  Reorganization  was  presented  to the  Board  at a  meeting  held on
February 29, 2000. At the meeting,  the Board  questioned  management  about the
potential benefits and costs to shareholders of Main Street California Municipal
Fund.  While deciding  whether to recommend  approval of the  Reorganization  to
shareholders,  the Board considered,  among other things:  the expense ratios of
Main  Street  California  Municipal  Fund and  California  Municipal  Fund;  the
comparative  investment performance of Main Street California Municipal Fund and
California Municipal Fund; the investment objectives and policies,  restrictions
and investment practices of Main Street California Municipal Fund and California
Municipal Fund; the additional class of shares available in California Municipal
Fund; the tax consequences of the Reorganization; and the significant experience
of the portfolio manager and Manager.  At a subsequent Board Meeting,  the Board
also  considered more current  expense ratio  information.  The Board noted that
shareholders  should notice very little, if any,  investment and/or  operational
differences between the Funds because their investment  objectives are virtually
identical with substantially  similar investment  policies,  they are managed by
the same portfolio manager, and their arrangements for the purchase, sale and/or
exchange of shares are also  substantially  the same.  The Board also noted that
each Fund will pay for its own Reorganization  expenses incurred,  including the
tax  opinion,  and  that  the  Reorganization  is  expected  to be  tax-free  to
shareholders and the Funds.


      The Board  concluded that the  Reorganization  is in the best interests of
the shareholders of Main Street  California  Municipal Fund and that no dilution
of value would result to  shareholders  from the  Reorganization.  The Directors
approving  the  Reorganization  and  the  Reorganization  Agreement  included  a
majority  of the  Directors  who  are not  interested  persons  of  Main  Street
California Municipal Fund or California Municipal Fund.

      The Board's  conclusion  was based on a number of factors,  including that
the Reorganization would permit shareholders to pursue their investment goals in
a larger  fund  managed by the same  portfolio  management  team.  A larger fund
should  have an  enhanced  ability  to  effect  portfolio  transactions  on more
favorable  terms and should have  greater  investment  flexibility.  A fund with
larger net assets may also be able to reduce or  eliminate  certain  duplicative
costs and expenses.  However,  certain  variable  expenses that are based on the
value of assets or the number of shareholder  accounts,  such as transfer agency
fees, would be largely unaffected by the Reorganization.

      The Board considered the fact that the investment  advisory  agreement for
California  Municipal Fund provided for reductions in the management fees as the
assets of the Fund grow.  The  investment  advisory  agreement  for Main  Street
California Fund does not currently provide for a reduction in management fees as
assets grow.

      The Board  further  noted  that the  expenses  of Main  Street  California
Municipal Fund are lower and its investment  performance  better than California
Municipal Fund due in large part to two factors: (1) the Manager had voluntarily
limited  the  investment  advisory  fee to 0.40% of  average  annual  net assets
instead of the full contractual rate of 0.55% of average annual net assets;  and
(2) the Class A shares of Main  Street  California  Municipal  Fund do not pay a
service  fee.  The Manager  also  advised the Board that it does not expect Main
Street California Municipal Fund to grow, but expects it to have net redemptions
in part  because  the Fund does not have a service  plan for its Class A shares.
The Manager has found it is  necessary  to have a service  plan in order to sell
shares in the current competitive  environment.  Without such a plan the Manager
believes that net redemptions of shares will continue and eventually the expense
ratio of Main Street  California  Municipal Fund will increase.  The Board noted
that, in their  experience,  service  plans are common and important  factors in
helping  attract and maintain  assets and financial  intermediaries  to sell and
service shares of a mutual fund.


      The  Board  considered  that it  could  submit a  service  plan to Class A
shareholders  for  approval.  The Board,  however,  recognized  that Main Street
California  Municipal Fund is a very small fund.  The Manager  advised that even
with a service plan it would not expect the Fund to grow to a size approximating
the size of the combined fund for a number of years.


      The  Board  noted  that  the  Manager  removed  the  voluntary  investment
management  fee  waiver  of  0.15% of  average  annual  net  assets.  The  Board
recognized that implementation of a service fee would add approximately 0.25% of
average  annual  net  assets  to the  Class  A  expense  ratio.  Therefore,  the
respective  expense  ratios  for  Class A and  Class  B  shares  of Main  Street
California Municipal Fund and California Municipal Fund would be essentially the
same. Since the investment  practices of each Fund are essentially the same, the
yield of Main Street  California  Municipal  Fund would be expected to track the
yield of California  Municipal  Fund.  The Board  therefore  concluded  that the
Reorganization would be in the shareholders' best interests because the combined
fund should be large enough to have a better  chance to enjoy any benefits  that
may come from economies of scale from a larger fund.

      The  Board  of  California   Municipal  Fund  also   determined  that  the
Reorganization  was in the best  interests of California  Municipal Fund and its
shareholders and that no dilution would result to those shareholders. California
Municipal  Fund  shareholders  do not vote on the  Reorganization.  The  Board's
determination was based on the following factors, among others: its anticipation
that the addition of the assets of Main Street  California  Municipal Fund would
create a larger fund providing  potentially greater efficiencies for the benefit
of  shareholders  and that total  operating  expenses as a percentage of average
annual net assets for all classes of shares of California  Municipal  Fund would
be slightly reduced.

      For the reasons discussed above, the Board of Directors of the Company, on
behalf of Main Street  California  Municipal Fund,  recommends that you vote FOR
the Reorganization Agreement and the Reorganization. If the shareholders of Main
Street California  Municipal Fund do not approve the  Reorganization  Agreement,
the Board  may  consider  other  possible  courses  of  action  for Main  Street
California Municipal Fund, including dissolution and liquidation.


                      INFORMATION ABOUT THE REORGANIZATION

            This is only a summary of the Reorganization  Agreement.  You should
read the actual form of Reorganization Agreement. It is attached as Exhibit A.

How Will the Reorganization be Carried Out?

      If the shareholders of Main Street  California  Municipal Fund approve the
Reorganization  Agreement,  the  Reorganization  will take place  after  various
conditions are satisfied by Main Street California Municipal Fund and California
Municipal Fund,  including  delivery of certain  documents.  The closing date is
presently  scheduled  for October 19, 2000 and the  valuation  date is presently
scheduled  for October  18,  2000.  If  shareholders  of Main Street  California
Municipal Fund do not approve the Reorganization  Agreement,  the Reorganization
will not take place.

      If  shareholders  of Main Street  California  Municipal  Fund  approve the
Reorganization  Agreement, Main Street California Municipal Fund will deliver to
California  Municipal Fund  substantially all of its assets on the closing date.
In exchange,  Main Street  California  Municipal  Fund, will receive Class A and
Class B California  Municipal  Fund shares that have a value equal to the dollar
value of the  assets  delivered  by Main  Street  California  Municipal  Fund to
California  Municipal Fund. Main Street  California  Municipal Fund will then be
liquidated  and its  outstanding  shares will be cancelled.  The stock  transfer
books of Main Street California Municipal Fund will be permanently closed at the
close of business on the valuation date. Only  redemption  requests  received in
proper  form on or before the close of business  on the  valuation  date will be
fulfilled by Main Street California Municipal Fund. Redemption requests received
after  that time will be  considered  requests  to redeem  shares of  California
Municipal Fund.

      Shareholders of Main Street California Municipal Fund who vote their Class
A or Class B shares in favor of the Reorganization will be electing in effect to
redeem their shares of Main Street California  Municipal Fund at net asset value
on the  Valuation  Date,  after  subtracting  a Cash  Reserve,  and reinvest the
proceeds in Class A or Class B shares of California  Municipal Fund at net asset
value.  The Cash  Reserve is that  amount  retained  by Main  Street  California
Municipal Fund which is deemed sufficient in the discretion of the Board for the
payment of the Fund's outstanding debts and expenses of liquidation.  California
Municipal  Fund is not  assuming any debts of Main Street  California  Municipal
Fund except debts for unsettled securities transactions and outstanding dividend
and  redemption  checks.  Main Street  California  Municipal Fund will recognize
capital gain or loss on any sales made prior to the Reorganization.
Under the Reorganization Agreement, within one year after the Closing Date, Main
Street California Municipal Fund shall: (a) either pay or make provision for all
of its debts and taxes;  and (b) either (i) transfer any remaining amount of the
Cash Reserve to  California  Municipal  Fund,  if such  remaining  amount is not
material (as defined  below) or (ii)  distribute  such  remaining  amount to the
shareholders  of Main  Street  California  Municipal  Fund who were  such on the
Valuation  Date.  Such  remaining  amount  shall be deemed to be material if the
amount  to be  distributed,  after  deducting  the  estimated  expenses  of  the
distribution,  equals or exceeds one cent per share of the number of Main Street
California  Municipal Fund shares outstanding on the Valuation Date. If the Cash
Reserve is  insufficient  to satisfy  any of Main  Street  California  Municipal
Fund's  liabilities,  the  Manager  will  assume  responsibility  for  any  such
unsatisfied  liability.  Within one year after the  Closing  Date,  Main  Street
California Municipal Fund will complete its liquidation.

      Under  the  Reorganization   Agreement,   either  Main  Street  California
Municipal  Fund or  California  Municipal  Fund may  abandon and  terminate  the
Reorganization  Agreement  without  liability  if the other party  breaches  any
material provision of the Reorganization  Agreement or, if prior to the closing,
any legal,  administrative or other proceeding shall be instituted or threatened
(i) seeking to restrain or otherwise  prohibit the transactions  contemplated by
the  Reorganization  Agreement  and/or (ii)  asserting a material  liability  of
either party.

      To the  extent  permitted  by law,  the  Funds  may  agree  to  amend  the
Reorganization  Agreement without shareholder  approval.  They may also agree to
terminate  and abandon the  Reorganization  at any time before or, to the extent
permitted by law, after the approval of shareholders  of Main Street  California
Municipal Fund.

Who Will Pay the Expenses of the Reorganization?

      The  Funds  will  bear the  cost of their  respective  tax  opinions.  Any
documents such as existing  prospectuses  or annual reports that are included in
the  proxy  mailing  or at a  shareholder's  request  will be a cost of the Fund
issuing the  document.  Any other  out-of-pocket  expenses  associated  with the
Reorganization will be paid by the Funds in the amounts incurred by each.

What are the Tax Consequences of the Reorganization?

      The Reorganization is intended to qualify as a tax-free reorganization for
federal income tax purposes under Section 368(a)(1) of the Internal Revenue Code
of 1986, as amended.  Based on certain assumptions and representations  received
from the Main Street California Municipal Fund and California Municipal Fund, it
is  expected  to be the  opinion of KPMG LLP,  tax  advisor  to the Funds,  that
shareholders  of Main Street  California  Municipal  Fund will not recognize any
gain or loss for  federal  income tax  purposes  as a result of the  exchange of
their shares for shares of California  Municipal Fund and that  shareholders  of
California  Municipal  Fund will not  recognize any gain or loss upon receipt of
Main Street  California  Municipal Funds' assets.  In addition,  neither Fund is
expected to recognize a gain or loss as a result of the Reorganization.

     Immediately prior to the valuation date, Main Street  California  Municipal
Fund will pay a dividend(s)  which will have the effect of  distributing to Main
Street  California  Municipal Fund's  shareholders all of Main Street California
Municipal Fund's  investment  company taxable income for taxable years ending on
or prior to the Closing  Date  (computed  without  regard to any  deduction  for
dividends  paid) and all of its net capital  gain,  if any,  realized in taxable
years ending on or prior to the Closing Date (after  reduction for any available
capital loss  carry-forward).  Main Street California Municipal Fund is expected
to have a capital  loss carry-forward  of  approximately  $1.052  million as of
8/31/00,  which  may be  subject  to  limitation  under  federal  tax law.  Such
dividends  will be  included in the  taxable  income of Main  Street  California
Municipal Fund's shareholders as ordinary income and capital gain, respectively.

      You will  continue to be  responsible  for tracking the purchase  cost and
holding period of your shares and should consult your tax advisor  regarding the
effect, if any, of the Reorganization in light of your individual circumstances.
You should  also  consult  your tax  advisor as to state and local and other tax
consequences, if any, of the Reorganization because this discussion only relates
to federal income tax consequences.

What should I know about California Municipal Fund - Class A and Class B shares?

      The rights of shareholders of both Funds are substantially the same. Class
A and  Class B shares  of  California  Municipal  Fund  will be  distributed  to
shareholders  of  Class A and  Class B Main  Street  California  Municipal  Fund
shareholders,  respectively,  in connection with the Reorganization.  Each share
will be fully paid and  nonassessable  when issued  with no  personal  liability
attaching to the ownership thereof, will have no preemptive or conversion rights
and will be transferable on the books of California Municipal Fund. Neither Fund
permits  cumulative  voting.  The shares of  California  Municipal  Fund will be
recorded electronically in each shareholder's account. California Municipal Fund
will  then  send  a  confirmation  to  each  shareholder.  As  described  in its
prospectus,  California Municipal Fund does not issue share certificates for its
Class  B and  Class  C  shares.  Former  Class A  shareholders  of  Main  Street
California  Municipal  Fund who  wish to have  certificates  representing  their
shares of California  Municipal Fund must make a written request to the Transfer
Agent.   Shareholders   of  Main  Street   California   Municipal  Fund  holding
certificates  representing  their shares will not be required to surrender their
certificates  in connection  with the  reorganization.  However,  former Class A
shareholders  of  Main  Street  California   Municipal  Fund  whose  shares  are
represented  by  outstanding  share  certificates  will not be allowed to redeem
shares of California Municipal Fund until the certificates have been returned.

      Like Main Street California Municipal Fund, California Municipal Fund does
not routinely hold annual shareholder meetings.

What are the  capitalizations  of the Funds and what might the capitalization be
after the Reorganization?

The following  table sets forth the  capitalization  (unaudited)  of Main Street
California  Municipal Fund and  California  Municipal Fund and indicates the pro
forma combined  capitalization as of March 31, 2000 as if the Reorganization had
occurred on that date.

                                                                       Net Asset
                                                Shares                  Value
                              Net Assets        Outstanding       Per Share

Main Street California Municipal Fund
      Class A                 $97,049,913       8,167,937         $11.88
      Class B                 $26,290,660       2,214,930         $11.87


California Municipal Fund
      Class A                 $270,100,268            27,079,405        $9.97
      Class B                 $107,306,479            10,754,056        $9.98
      Class C                 $ 13,653,692             1,370,697        $9.96

California Municipal Fund
(Pro Forma Surviving Fund)
      Class A                 $367,150,181            36,813,599        $9.97
      Class B                 $133,597,139            13,388,391        $9.98
      Class C                 $ 13,653,692             1,370,697        $9.96


Reflects the issuance of 9,734,194  Class A shares and 2,634,335  Class B shares
of California  Municipal Fund in a tax-free  exchange for the net assets of Main
Street California Municipal Fund, aggregating $123,340,573.

                  COMPARISON OF INVESTMENT OBJECTIVES AND POLICIES

      This section  describes key investment  policies of Main Street California
Municipal Fund and California Municipal Fund, and certain noteworthy differences
between the investment  objectives and policies of the two Funds. For a complete
description of California  Municipal Fund's investment policies and risks please
review its  prospectus  dated  November  22,  1999,  which is  attached  to this
Prospectus/Proxy Statement as Exhibit A.

Are there any  significant  differences  between the  investment  objectives and
strategies of the Funds?

      Information  about Main Street  California  Municipal  Fund and California
Municipal  Fund is  presented  below.  In  considering  whether to  approve  the
Reorganization,  shareholders  of Main Street  California  Municipal Fund should
consider the  differences  in investment  objectives,  policies and risks of the
funds.  Additional  information about California  Municipal Fund is set forth in
its Prospectus,  accompanying this  Prospectus/Proxy  Statement and incorporated
herein by reference, and additional information about both funds is set forth in
documents that may be obtained upon request of the Transfer Agent or upon review
at the  offices  of the SEC.  See  "Information  about  Main  Street  California
Municipal Fund" and "Information about California Municipal Fund".

      Main Street California Municipal Fund's investment objective is to seek as
high a level of current  income  exempt  from  federal and  California  personal
income  taxes as is available  from  investing  in  municipal  securities  while
attempting to preserve capital. California Municipal Fund's investment objective
is to seek as high a level of current  interest  income  exempt from federal and
California  income  taxes  for  individual   investors  as  is  consistent  with
preservation of capital.  The investment  policies of the funds differ slightly.
Both funds invest mainly in California  municipal  securities  that pay interest
exempt from federal and  California  personal  income  taxes.  As a  fundamental
policy, Main Street California  Municipal Fund invests at least 80% of its total
assets in California municipal  securities under normal market conditions.  As a
fundamental  policy under normal market  conditions,  California  Municipal Fund
invests at least 80% of its assets in municipal securities.  Under normal market
conditions,  the California Municipal Fund as a matter of non-fundamental policy
attempts  to invest  100% of its assets in  municipal  securities  and invest at
least 65% of its total assets in California municipal securities.  Both funds do
not limit their  investments to securities of a particular  maturity range,  and
may  hold  both  short-  and  long-term  securities.  They  currently  focus  on
longer-term securities to seek higher yields.

      The Funds generally do not dispose of their municipal  securities prior to
their  maturity,  but may do so for  liquidity,  or  because  of  other  factors
affecting the issuer that cause the Manager to sell the particular security.  In
such a case, the Funds could experience a capital gain or loss on the sale.

How Do the Investment Policies of the Funds compare?

      Municipal  Securities.  The municipal securities that both funds invest in
primarily include municipal bonds (which are long-term  obligations),  municipal
notes (short-term  obligations),  and interests in municipal leases.  Both funds
invest mainly in California municipal securities, which are municipal securities
that are not subject  (in the opinion of bond  counsel to the issuer at the time
they are issued) to California  personal  income tax. The debt  obligations  are
issued  by the  State of  California  and its  political  subdivisions  (such as
cities,  towns,  counties,  agencies  and  authorities).  The  term  "California
municipal  securities"  may also include debt  securities of the  governments of
certain  possessions,  territories and commonwealths of the United States if the
interest is not subject to California personal income tax.

      The  funds  can  also  buy  other  municipal  securities,  issued  by  the
governments  of the  District of Columbia  and of other  states as well as their
political  subdivisions,  authorities and agencies, and securities issued by any
commonwealths,  territories  or  possessions  of the  United  States,  or  their
respective agencies,  instrumentalities or authorities,  if the interest paid on
the  security is not subject to federal  personal  income tax (in the opinion of
bond counsel to the issuer at the time the security is issued).

      The funds can buy  municipal  securities  that are "general  obligations,"
secured by the  issuer's  pledge of its full faith,  credit and taxing power for
the  payment  of  principal  and  interest.  The  funds  can also  buy  "revenue
obligations,"  payable only from the revenues derived from a particular facility
or class of facilities,  or a specific excise tax or other revenue source.  Some
revenue  obligations are private  activity bonds that pay interest that may be a
tax preference item for investors subject to alternative minimum tax.

      Ratings  of  Municipal  Securities  the Funds Buy.  Most of the  municipal
securities  both  funds  buy are  "investment-grade"  at the  time of  purchase.
Neither fund  invests more than 25% of its total assets in municipal  securities
that  at the  time of  purchase  are  not  investment-grade.  "Investment-grade"
securities are those rated within the four highest rating categories of Moody's,
Standard & Poor's, Fitch or Duff & Phelps or other nationally  recognized rating
organizations,  or (if unrated)  judged by the Manager to be comparable to rated
investment-grade securities.

      The   Manager   may   rely  to  some   extent   on   credit   ratings   by
nationally-recognized  rating  organizations  in  evaluating  the credit risk of
securities  selected for either fund's portfolio.  It also uses its own research
and analysis.  Many factors affect an issuer's  ability to make timely payments,
and the credit risks of a particular security may change over time.

If the securities  are not rated,  the Manager will use its judgment to assign a
rating  to a  security  comparable  to  that of a  rating  agency.  Main  Street
California  Municipal Fund limits its  investments in unrated  securities to not
more than 20% of its total assets.  If the rating of a security is reduced after
either fund buys it, that fund is not required  automatically to dispose of that
security.  However,  the Manager will  evaluate  those  securities  to determine
whether to keep them in the fund's portfolio.

      Special Credit Risks of Lower-Grade Securities.  Although investment grade
securities  are  subject to risks of  non-payment  of  interest  and  principal,
generally, high-yielding, lower-grade securities, whether rated or unrated, have
greater risks than investment grade securities. Lower-grade municipal securities
(these are  sometimes  called  "junk  bonds")  may be subject to greater  market
fluctuations and greater risks of loss of income and principal than higher-grade
municipal securities. Securities that are (or that have fallen) below investment
grade  entail  a  greater  risk  that  the  issuers  may  not  meet  their  debt
obligations.  Please refer to each Fund's Prospectus and Statement of Additional
Information for a more detailed explanation.

      Municipal Lease Obligations.  Municipal leases are used by state and local
governments to obtain funds to acquire land, equipment or facilities. Both funds
can invest in  certificates  of  participation  that  represent a  proportionate
interest in payments made under  municipal  lease  obligations.  Most  municipal
leases, while secured by the leased property, are not general obligations of the
issuing municipality. They often contain "non-appropriation" clauses under which
the municipal government has no obligation to make lease or installment payments
in  future  years  unless  money  is  appropriated  on a  yearly  basis.  If the
government  stops making  payments or  transfers  its payment  obligations  to a
private entity, the obligation could lose value or become taxable.

      Other Investment Strategies. To seek their objectives,  the funds can also
use the investment  techniques and strategies  described  below. The funds might
not always use all of them.  These  techniques  have certain risks although some
are designed to help reduce overall investment or market risks.

Floating Rate/Variable Rate Obligations. Some municipal securities have variable
or floating  interest  rates.  Variable rates are adjustable at stated  periodic
intervals.  Floating rates are automatically  adjusted  according to a specified
market rate for such investments,  such as the percentage of the prime rate of a
bank, or the 91-day U.S. Treasury Bill rate.

Certain variable rate bonds known as "inverse  floaters" pay interest rates that
move in the  opposite  direction  of yields on  short-term  bonds in response to
market changes.  As interest rates rise,  inverse  floaters produce less current
income, and their market value can become volatile.  Inverse floaters are a type
of  "derivative  security."  Some have a "cap," so that if  interest  rates rise
above the "cap," the security pays additional  interest income.  If rates do not
rise above the "cap," the fund will have paid an additional amount for a feature
that proves worthless. Neither fund can invest more than 20% of its total assets
in inverse floaters.

Other  Derivatives.  Both funds can also invest in other derivative  investments
that pay interest  that depends on the change in value of an  underlying  asset,
interest rate or index.  Examples are hedging instruments,  interest rate swaps,
municipal bond indices or swap indices.

Derivatives have risks. If the issuer of the derivative  investment does not pay
the  amount  due,  the fund can lose  money on the  investment.  The  underlying
security  or  investment  on which a  derivative  is based,  and the  derivative
itself, may not perform the way the Manager expected it to. As a result of these
risks the fund could realize less principal or income from the  investment  than
expected  or its hedge  might be  unsuccessful.  As a result,  the fund's  share
prices  could fall.  Certain  derivative  investments  held by the fund might be
illiquid.

Hedging.  Both funds can buy and sell futures  contracts,  put and call options,
and enter into  interest  rate swap  agreements.  These are all  referred  to as
"hedging  instruments."  Neither fund uses hedging for speculative  purposes and
both funds have limits on their use of hedging instruments. The Funds do not use
hedging  instruments to a substantial degree and are not required to use them in
seeking their objective.

Hedging  involves  risk.  If the Manager uses a hedging  instrument at the wrong
time or judges  market  conditions  incorrectly,  the strategy  could reduce the
fund's  return.  The funds  could  also  experience  losses if the prices of its
futures and options  positions were not correlated with their other  investments
or if they could not close out a position  because of an illiquid market for the
future or option.

Interest  rate swaps are  subject to credit  risks (if the other  party fails to
meet its  obligations)  and also to  interest  rate  risks.  The funds  could be
obligated to pay more under their swap  agreements than they receive under them,
as a result of interest  rate  changes.  Neither  Fund may enter into swaps with
respect to more than 25% of its total assets.

When-Issued and Delayed-Delivery Transactions. Both funds may purchase municipal
securities on a "when-issued"  basis and may purchase or sell such securities on
a "delayed-delivery"  basis. Between the purchase and settlement,  no payment is
made for the security and no interest  accrues to the buyer from the investment.
There is a risk of loss to the funds if the value of the security declines prior
to the settlement date.

Puts and Stand-By Commitments.  Both funds can acquire "stand-by commitments" or
"puts" with respect to municipal securities.  The funds obtain the right to sell
specified  securities at a set price on demand to the issuing  broker-dealer  or
bank. However, this feature may result in a lower interest rate on the security.
Both funds  acquire  stand-by  commitments  or puts solely to enhance  portfolio
liquidity

Illiquid and Restricted Securities.  Investments may be illiquid because they do
not have an active trading market,  making it difficult to value them or dispose
of them promptly at an acceptable price. A restricted security is one that has a
contractual  restriction on its resale or which cannot be sold publicly until it
is registered under the Securities Act of 1933.  Certain  restricted  securities
that are  eligible  for  resale to  qualified  institutional  buyers  may not be
subject to that limit.  Neither fund will invest more than 15% of its net assets
in illiquid and restricted securities. The Manager monitors holdings of illiquid
securities  on an ongoing  basis to  determine  whether to sell any  holdings to
maintain  adequate  liquidity.  California  Municipal Fund cannot buy securities
that have a restriction on resale.

Temporary Defensive Investments. Both funds can invest up to 100% of their total
assets in  temporary  defensive  investments  during  periods of unusual  market
conditions.  Generally,  they would be short-term municipal securities but could
be U.S.  government  securities or highly-rated  corporate debt securities.  The
income from some temporary  defensive  investments  may not be  tax-exempt,  and
therefore  when making  those  investments  the funds  might not  achieve  their
objectives.  The  funds  can also hold  cash and cash  equivalents  pending  the
investment of proceeds  from the sale of fund shares or portfolio  securities or
to meet anticipated redemptions of fund shares.

Loans of Portfolio Securities. Both funds can lend their portfolio securities to
brokers, dealers and other financial institutions. The fund might do so to raise
cash for liquidity purposes. These loans are limited to not more than 10% of the
value of the Main  Street  California  Municipal  Fund's net assets and not more
than 25% of the value of California  Municipal  Fund's total  assets.  There are
risks in connection with securities  lending.  The fund might experience a delay
in receiving  additional  collateral to secure a loan, or a delay in recovery of
the loaned  securities.  Neither  fund  presently  intends to engage in loans of
securities that will exceed 5% of the value of that fund's total assets.  Income
from securities loans does not constitute exempt-interest income for the purpose
of paying tax-exempt dividends.

The fund must receive collateral for a loan. Under current applicable regulatory
requirements  (which  are  subject to  change),  on each  business  day the loan
collateral must be at least equal to the value of the loaned securities. It must
consist of cash,  bank letters of credit,  securities of the U.S.  government or
its agencies or  instrumentalities,  or other cash equivalents in which the fund
is permitted to invest.  To be acceptable as collateral,  letters of credit must
obligate a bank to pay  amounts  demanded  by the fund if the  demand  meets the
terms of the letter. The terms of the letter of credit and the issuing bank both
must be satisfactory to the fund.

When it lends  securities,  the fund receives  amounts equal to the dividends or
interest  on  the  loaned  securities.  It  also  receives  one or  more  of (a)
negotiated  loan fees, (b) interest on securities  used as  collateral,  and (c)
interest on  short-term  debt  securities  purchased  with the loan  collateral.
Either  type of  interest  may be  shared  with the  borrower.  The fund can pay
reasonable  finder's,  administrative  or other  fees in  connection  with these
loans.  The terms of the  fund's  loans  must meet  applicable  tests  under the
Internal Revenue Code and must permit the fund to reacquire loaned securities on
five days' notice or in time to vote on any important matter.

Zero-Coupon  Securities.  Both funds can buy  zero-coupon  and delayed  interest
municipal  securities.  Zero-coupon  securities  do not make  periodic  interest
payments  and are sold at a deep  discount  from  their  face  value.  The buyer
recognizes  a rate of  return  determined  by the  gradual  appreciation  of the
security,  which is redeemed at face value on a specified  maturity  date.  This
discount  depends on the time remaining  until  maturity,  as well as prevailing
interest  rates,  the  liquidity of the  security and the credit  quality of the
issuer.  In the absence of threats to the issuer's credit quality,  the discount
typically decreases as the maturity date approaches. Some zero-coupon securities
are convertible,  in that they are zero-coupon  securities until a predetermined
date, at which time they convert to a security with a specified coupon rate.

Because zero-coupon securities pay no interest and compound semi-annually at the
rate fixed at the time of their issuance, their value is generally more volatile
than the value of other debt securities.  Their value may fall more dramatically
than the value of  interest-bearing  securities  when interest rates rise.  When
prevailing interest rates fall, zero-coupon securities tend to rise more rapidly
in value because they have a fixed rate of return.

Repurchase  Agreements.  Both funds can acquire securities subject to repurchase
agreements.   They  may  do  so  for  liquidity  purposes  to  meet  anticipated
redemptions of fund shares, or pending the investment of the proceeds from sales
of fund shares, or pending the settlement of portfolio securities  transactions.
In  a  repurchase   transaction,   the  fund  acquires  a  security   from,  and
simultaneously  resells it to an approved  vendor for delivery on an agreed upon
future  date.  The resale  price  exceeds the  purchase  price by an amount that
reflects an agreed-upon  interest rate effective for the period during which the
repurchase agreement is in effect.

Repurchase  agreements  having a maturity  beyond  seven days are subject to the
funds' limits on holding illiquid  investments.  There is no limit on the amount
of the funds' net assets that may be subject to  repurchase  agreements of seven
days  or  less.  Because  income  earned  on  repurchase   transactions  is  not
tax-exempt, under normal market conditions the funds will limit their repurchase
transactions  to 20% of their  total  assets.  That limit may be exceeded if the
funds use repurchase agreements as temporary defensive investments.

Borrowing.  Main Street  California  Municipal  Fund can borrow up to 10% of the
value of its  total  assets.  It can  borrow  only as a  temporary  measure  for
extraordinary  or  emergency  purposes.  It  cannot  make  any  investment  when
borrowings exceed 5% of its total assets. Main Street California  Municipal Fund
can borrow  only if it  maintains  a 300% ratio of assets to  borrowings  at all
times while a borrowing is outstanding. Interest on borrowed money is an expense
the fund would not  otherwise  incur,  so that it might have  reduced net income
during periods of substantial borrowings.

What are the fundamental investment restrictions of the Funds?

      Both Main Street California  Municipal Fund and California  Municipal Fund
have  certain  additional  investment  restrictions  that,  together  with their
investment objectives, are fundamental policies,  changeable only by shareholder
approval. Generally, these investment restrictions are similar between the funds
and are discussed below.

o  Neither fund can lend money except in connection with the acquisition of debt
   securities and for  California  Municipal  Fund,  repurchase  agreements,  as
   permitted by its investment  policies and  restrictions.  Both funds can also
   make loans of portfolio  securities,  subject to the  restrictions  listed in
   each funds' Statement of Additional Information and summarized above.

o  Neither fund can concentrate  investments.  That means they cannot invest 25%
   or  more  of  their  total  assets  in any  industry.  However,  there  is no
   limitation on investments in municipal securities,  obligations issued by the
   State  of  California  or  its   subdivisions,   agencies,   authorities   or
   instrumentalities,  or securities issued or guaranteed by the U.S. government
   or its agencies or instrumentalities.

o  Main Street  California  Municipal Fund cannot invest in any other securities
   other than municipal securities,  temporary defensive investments and hedging
   instruments.

o  California  Municpal Fund cannot  invest in  securities or other  investments
   other than municipal  securities,  the temporary investments described in its
   Prospectus,  repurchase agreements, covered calls, private activity municipal
   securities  and  hedging  instruments  described  in its  Prospectus  or this
   Statement of Additional Information.

o  California  Municipal  Fund cannot buy or sell futures  contracts  other than
   interest rate futures and municipal bond index futures.

o  Main Street  California  Municipal  Fund cannot invest in interests in oil or
   gas exploration or development  programs or in commodities.  However,  it can
   buy and sell any of the  hedging  instruments  permitted  by any of its other
   policies.  It does not matter if the hedging instrument is considered to be a
   commodity or commodity contract.

o  Neither  fund can  invest in real  estate  or in  interests  in real  estate.
   However,  Main Street  California  Municipal Fund can purchase  securities of
   issuers holding real estate or interests in real estate (including securities
   of real estate investment trusts).  Additionally,  California  Municipal Fund
   can invest in municipal  securities or other  permitted  securities  that are
   secured by real estate or interests in real estate.

o  Neither fund can purchase securities on margin. However, they can make margin
   deposits  when using  hedging  instruments  permitted  by any of their  other
   policies. Additionally,  California Municipal Fund may obtain such short-term
   credits that may be  necessary  for the  clearance of purchases  and sales of
   securities.

o California Municipal Fund cannot sell securities short.

o  Main Street  California  Municipal  Fund cannot  invest in companies  for the
   purpose of acquiring control or management of those companies.

o  Neither  fund can  underwrite  securities  of other  companies.  A  permitted
   exception  for Main Street  California  Fund is in case it is deemed to be an
   underwriter  under the  Securities  Act of 1933 when reselling any securities
   held in its own portfolio.

o  California  Municipal  Fund cannot invest in  securities  that are subject to
   restrictions on resale.

o  Neither fund can invest in or hold  securities  of any issuer if officers and
   directors or trustees of the funds or the Manager  individually  beneficially
   own more than 1/2 of 1% of the  securities  of that issuer and  together  own
   more than 5% of the securities of that issuer.

o  Main  Street  California  Municipal  Fund  cannot  invest  in other  open-end
   investment  companies  or invest more than 5% of its net assets  through open
   market purchases in closed-end investment companies, including small business
   investment  companies.  Additionally,  it cannot make any such  investment at
   commission rates in excess of normal brokerage commissions.

o  California Municipal Fund cannot invest in securities of any other investment
   company, except in connection with a merger with another investment company.

o  Neither fund can pledge,  mortgage or otherwise encumber,  transfer or assign
   any of its assets to secure a debt.  Collateral  arrangements for premium and
   margin payments in connection with hedging instruments are not deemed to be a
   pledge of assets.

o  Neither fund can issue "senior  securities" (this is not a fundamental policy
   for California Municipal Fund but it will not be changed without the approval
   of shareholders) but this does not prohibit certain investment activities for
   which assets of the funds are designated as segregated, or margin, collateral
   or escrow  arrangements  are established,  to cover the related  obligations.
   Examples of those  activities  include  borrowing money,  reverse  repurchase
   agreements,  delayed-delivery  and  when-issued  arrangements  for  portfolio
   securities  transactions,  and contracts to buy or sell derivatives,  hedging
   instruments, options or futures.

o  California  Municipal  Fund cannot borrow money in excess of 10% of the value
   of its total assets. It cannot buy any additional investments when borrowings
   exceed 5% of its assets. It may borrow only from banks as a temporary measure
   for  extraordinary  or  emergency  purposes,  and  not  for  the  purpose  of
   leveraging its investments.


What are the risk factors associated with investment in the Funds?

      Like all  investments,  an investment in both of the Funds  involves risk.
There is no assurance that the Funds will meet their investment objectives.  The
achievement of the Funds' goals depends upon market conditions,  generally,  and
on the portfolio  manager's  analytical and portfolio  management skills.  These
risks collectively form the risk profiles of the funds, and can affect the value
of the funds'  investments,  investment  performance and prices per share. These
risks mean that you can lose money by investing in either fund.  When you redeem
your  shares,  they may be worth  more or less than what you paid for them.  The
risks of the  Funds  are  basically  the same as those of other  investments  in
municipal securities and other investments in fixed income securities of similar
quality and characteristics.

      Credit Risk.  Municipal securities are subject to credit risk. Credit risk
is the risk that the issuer of a municipal  security might not make interest and
principal  payments on the  security as they become due. If the issuer  fails to
pay interest, the fund's income may be reduced, and if the issuer fails to repay
principal,  the value of that  security and of the fund's shares may be reduced.
Because  both funds can invest as much as 25% of their total assets in municipal
securities  below  investment-grade  to seek higher income,  the credit risks of
both funds are greater than those of funds that buy only investment-grade bonds.
A downgrade in an issuer's  credit  rating or other adverse news about an issuer
can reduce the market value of that issuer's securities.

      Interest Rate Risks.  Municipal securities are subject to changes in value
when prevailing  interest rates change.  When interest rates fall, the values of
already-issued  municipal  securities  generally rise. When interest rates rise,
the values of already-issued  municipal  securities  generally decline,  and the
bonds may sell at a discount  from their face  amount.  The  magnitude  of these
price changes is generally greater for bonds with longer maturities.  Both funds
currently focus on longer-term securities to seek higher income.  Therefore, the
share prices of both funds may fluctuate more when interest rates change.

      Risks Of Non-Diversification. Both funds are "non-diversified." That means
that compared to funds that are  diversified,  they can invest a greater portion
of their  assets in the  securities  of one issuer,  such as bonds issued by the
State of California.  Having a higher percentage of their assets invested in the
securities of fewer issuers,  particularly  obligations of government issuers of
one state, could result in greater  fluctuations of both funds' share prices due
to economic, regulatory or political problems in California.

      Risks In Using Derivative  Investments.  Both funds can use derivatives to
seek increased  returns or to try to hedge investment risks. In general terms, a
derivative  investment is an investment  contract  whose value depends on (or is
derived from) the value of an underlying asset, interest rate or index. Options,
futures,  "inverse  floaters"  and  variable  rate  obligations  are examples of
derivatives both funds may use. If the issuer of the derivative  investment does
not pay the amount due, the funds can lose money on their investments. Also, the
underlying  security or  investment on which the  derivative  is based,  and the
derivative  itself,  may not perform the way the Manager expected it to perform.
If that  happens,  the funds will get less income  than  expected or their share
price could decline.  To try to preserve capital,  the both funds have limits on
the amount of particular types of derivatives they can hold.

      Special Credit Risks of Lower-Grade  Securities.  Both funds can invest up
to 25 % of their total assets in municipal  securities that are below investment
grade.  Lower-grade  municipal  securities  may be  subject  to  greater  market
fluctuations and greater risks of loss of income and principal than higher-grade
municipal securities. Securities that are (or that have fallen) below investment
grade  entail  a  greater  risk  that  the  issuers  may  not  meet  their  debt
obligations.

How do the Account Features and Shareholder Services for the Funds Compare?

      Investment Management- Pursuant to each investment advisory agreement, the
Manager  acts  as the  investment  advisor  for the  funds  and  supervises  the
investment program of the funds. The investment  advisory  agreements state that
the  Manager  will  provide  administrative  services  for the funds,  including
compilation  and  maintenance  of  records,  preparation  and  filing of reports
required  by  the  SEC,  reports  to  shareholders,  and  composition  of  proxy
statements and registration  statements required by Federal and state securities
laws.  Further,  the Manager has agreed to furnish the funds with office  space,
facilities  and equipment and arrange for its employees to serve as officers the
funds.  The  administrative  services to be  provided  by the Manager  under the
investment advisory agreement will be at its own expense.

      Expenses not expressly  assumed by the Manager under each fund's  advisory
agreement or by the Distributor  under the General  Distributor's  Agreement are
paid by the funds. The investment  advisory agreements list examples of expenses
paid by the funds,  the major  categories  of which relate to  interest,  taxes,
brokerage  commissions,  fees to certain  Directors,  Trustees,  legal and audit
expenses,  custodian and transfer agent expenses,  share issuance costs, certain
printing and registration costs and non-recurring expenses, including litigation
costs.

Both  investment  advisory  agreements  state  that in the  absence  of  willful
misfeasance,  bad faith,  gross  negligence in the  performance of its duties or
reckless  disregard of its obligations and duties under the investment  advisory
agreement,  the Manager is not liable for any loss  sustained  by reason of good
faith  errors  or  omissions  in  connection  with  any  matters  to  which  the
agreement(s)  relate.  The  agreements  permit the Manager to act as  investment
advisor for any other person,  firm or corporation.  Pursuant to each agreement,
the Manager is permitted to use the names "Oppenheimer"  and/or "Main Street" in
connection  with other  investment  companies for which it may act as investment
advisor or general distributor. If the Manager shall no longer act as investment
advisor to the funds, the Manager may withdraw the right of the funds to use the
names "Oppenheimer" and/or "Main Street" as part of their names.

      The Manager is  controlled by  Oppenheimer  Acquisition  Corp.,  a holding
company  owned  in part by  senior  management  of the  Manager  and  ultimately
controlled  by  Massachusetts  Mutual  Life  Insurance  Company,  a mutual  life
insurance company that also advises pension plans and investment companies.  The
Manager  has  been  an  investment  advisor  since  January  1960.  The  Manager
(including  subsidiaries  and an  affiliate)  managed  more than $120 billion in
assets as of March 31, 2000,  including other Oppenheimer funds with more than 5
million shareholder accounts.  The Manager is located at Two World Trade Center,
34th Floor, New York, New York 10048-0203. OppenheimerFunds Services, a division
of the Manager,  acts as transfer and shareholder  servicing agent on an at-cost
basis for both Main Street  California  Municipal Fund and California  Municipal
Fund and for  certain  other  open-end  funds  managed  by the  Manager  and its
affiliates.

      Distribution  -  Pursuant  to  a  General  Distributor's   Agreement,  the
Distributor  acts as principal  underwriter in a continuous  public  offering of
shares of both Main Street  California  Municipal Fund and California  Municipal
Fund,  but is not  obligated  to sell a  specific  number  of  shares.  Expenses
normally  attributable to sales,  including advertising and the cost of printing
and mailing  prospectuses  other than those furnished to existing  shareholders,
are borne by the Distributor,  except for those which  Distributor is paid under
each Fund's Rule 12b-1 Distribution and Service Plan described below.

      California  Municipal Fund has adopted a Service Plan and Agreement  under
Rule 12b-1 of the  Investment  Company  Act for its Class A shares.  The Service
Plan  provides for the  reimbursement  to the  Distributor  for a portion of its
costs  incurred in  connection  with the  personal  service and  maintenance  of
accounts that hold Class A shares.  Under the plan, payment is made quarterly at
an annual  rate that may not exceed  0.25% of the  average  annual net assets of
Class A shares of the California Municipal Fund. The Distributor  currently uses
all of those fees to  compensate  dealers,  brokers,  banks and other  financial
institutions  quarterly  for  providing  personal  service  and  maintenance  of
accounts of their customers that hold Class A shares.

      Main Street California Municipal Fund does not have a Service Plan for its
Class A shares. If the  Reorganization is approved,  this would be an additional
expense borne by the Class A shareholders.  It is believed that the existence of
a Service Plan that  compensates  brokers for  providing  personal  services and
maintenance  of accounts  makes the fund a more  attractive  investment and thus
helps to generate  future  sales to help the fund's  assets  grow.  As explained
above,  as the fund's assets grow, the management fee of the combined fund would
decrease.

      Both Funds have adopted Distribution and Service Plans under Rule 12b-1 of
the 1940  Act for  their  Class B shares  and  California  Municipal  Fund has a
similar plan for its Class C shares.  Main Street  California  Municipal  Fund's
Plan reimburses the Distributor for its services and costs in distributing Class
B shares.  California  Municipal Fund's Plan compensates the Distributor for its
services  and costs in  distributing  Class B and Class C shares  and  servicing
accounts.  Under Main Street  California Fund's Plan, it pays the Distributor an
asset-based  sales charge at an annual rate of up to 0.75% per year. In the case
of California  Municipal  Fund, it pays the  Distributor  an  asset-based  sales
charge at an annual  rate of 0.75% per year.  The  Distributor  also  receives a
service fee of 0.25% per year under each plan.  All fee amounts are  computed on
the average  annual net assets of the class  determined  as of the close of each
regular  business  day of each Fund.  The Class B  asset-based  sales  charge is
retained by the Distributor. After the first year, the Class C asset-based sales
charge is paid to the  broker-dealer  as an ongoing  concession  for shares that
have been outstanding for a year or more.

      The  Distributor  uses all of the service fees to  compensate  dealers for
providing  personal services and maintenance of accounts of their customers that
hold shares of the funds.  The Class B  asset-based  sales charge is retained by
the Distributor.  After the first year, the Class C asset-based  sales charge is
paid to the broker  dealer as an ongoing  concession  for shares  that have been
outstanding for a year or more. The terms of the Class B plans are substantially
the same.

      Purchases and  Redemptions  - Both Funds are part of the  OppenheimerFunds
complex of funds.  The procedures for  purchases,  exchanges and  redemptions of
shares of the Funds are the same.  Shares of either  Fund may be  exchanged  for
shares of the same class of other Oppenheimer funds offering such shares.

      Both Funds have a maximum  initial sales charge of 4.75% on Class A shares
for  purchases  of less than  $50,000.  The sales charge of 4.75% is reduced for
purchases  of Class A shares of  $50,000  or more.  Investors  who  purchase  $1
million or more of Class A shares pay no  initial  sales  charge but may have to
pay a sales charge of up to 1% if the shares are sold within 12 calendar  months
from the end of the calendar  month during  which they were  purchased.  Class B
shares of the funds are sold without a front-end sales charge but may be subject
to a contingent deferred sales charge ("CDSC") upon redemption  depending on the
length of time the shares are held. The CDSC begins at 5% for shares sold in the
first year and declines to 1% in the sixth year and is eliminated after that.

      Class A and Class B shares of  California  Municipal  Fund received in the
Reorganization will be issued at net asset value,  without a sales charge and no
CDSC  will be  imposed  on any Main  Street  California  Municipal  Fund  shares
exchanged   for   California   Municipal   Fund   shares  as  a  result  of  the
Reorganization.  However,  any  CDSC  that  applies  to Main  Street  California
Municipal Fund shares will continue to apply to California Municipal Fund shares
received in the Reorganization. Services available to shareholders of both funds
include purchase and redemption of shares through  OppenheimerFunds  AccountLink
and  PhoneLink (an  automated  telephone  system),  telephone  redemptions,  and
exchanges by telephone to other Oppenheimer funds that offer Class A and Class B
shares, and reinvestment  privileges.  Please see "Shareholder  Services," below
and each fund's Prospectus for further information.

      Shareholder  Services--  Both Funds offer the same initial and  subsequent
minimum investment amounts for the purchase of shares.  These amounts are $1,000
and $25, respectively. Both Funds also offer the following privileges: (i) Right
of  Accumulation,  (ii) Letter of Intent,  (iii)  reinvestment  of dividends and
distributions  at net asset  value,  (iv) net asset value  purchases  by certain
individuals and entities,  (v) Asset Builder (automatic  investment) Plans, (vi)
Automatic  Withdrawal and Exchange Plans for  shareholders who own shares of the
fund valued at $5,000 or more,  (vii)  AccountLink  and PhoneLink  arrangements,
(viii)  exchanges of shares for shares of the same class of certain  other funds
at net asset value, and (ix) telephone redemption and exchange privileges.

      Shareholders  may purchase  shares through  OppenheimerFunds  AccountLink,
which  links  a  shareholder  account  to an  account  at a  bank  or  financial
institution and enables shareholders to send money electronically  between those
accounts to perform a number of types of account transactions. This includes the
purchase of shares  through  the  automated  telephone  system  (PhoneLink)  and
through the Internet.  Exchanges can also be made by telephone, or automatically
through  PhoneLink  or through  the  OppenheimerFunds  Internet  website.  After
AccountLink privileges have been established with a bank account,  shares may be
purchased by telephone in an amount up to $100,000. Shares of either fund may be
exchanged for shares of certain  Oppenheimer funds at net asset value per share;
however,  shares of a particular  class may be exchanged  only for shares of the
same  class of other  Oppenheimer  funds.  Shareholders  of the funds may redeem
their  shares  by  written  request,  by  telephone  request  in an amount up to
$100,000  in any  seven-day  period.  Shareholders  may  arrange  to have  share
redemption  proceeds wired to a  pre-designated  account at a U.S. bank or other
financial  institution that is an ACH member,  through AccountLink.  There is no
dollar limit on Internet or telephone redemption proceeds sent to a bank account
when  AccountLink  has been  established.  Shareholders  may also redeem  shares
automatically by telephone by using PhoneLink or the  OppenheimerFunds  Internet
website. Shareholders of Main Street California Municipal Fund may also have the
Transfer Agent send redemption  proceeds of $2,500 or more by Federal Funds wire
to a designated  commercial  bank which is a member of the Federal  Reserve wire
system.  Shareholders  of California  Municipal Fund do not have this option but
can still have the proceeds  sent to their bank account  through the ACH system.
Shareholders of both funds have up to six months to reinvest redemption proceeds
of their Class A shares which they  purchase  subject to a sales charge or their
Class B shares on which they paid a contingent deferred sales charge, in Class A
shares of the funds or other  Oppenheimer  funds without  paying a sales charge.
California  Municipal Fund may redeem  accounts  valued at less than $500 if the
account has fallen below such stated  amount for reasons other than market value
fluctuations and Main Street California  Municipal Fund may redeem accounts less
then $200 under the same conditions.  Both funds offer Automatic  Withdrawal and
Automatic Exchange Plans under certain conditions.

      Dividends and Distributions - Both Funds attempt to pay dividends on their
Class A shares at a constant  per share level.  There is no assurance  that they
will be able to do so. The Boards of the Funds may change the targeted  dividend
level at any time,  without  prior  notice to  shareholders.  Additionally,  the
amount of dividends  and the  distributions  paid on Class A, Class B or Class C
shares may vary over time,  depending on market  conditions,  the composition of
the Funds'  portfolios,  and expenses borne by the  particular  class of shares.
Dividends  paid on Class A shares  will  generally  be higher than those paid on
Class B or Class C shares,  which  normally  have higher  expenses than Class A.
There  can  be  no  guarantee  that  either  Fund  will  pay  any  dividends  or
distributions.

      Although neither Fund seeks capital gains, either Fund may realize capital
gains on the sale of portfolio securities. If it does, it may make distributions
out of any net  short-term or long-term  capital gains in December of each year.
The Funds may make  supplemental  distributions  of dividends  and capital gains
following the end of their fiscal years.


                               VOTING INFORMATION

How many votes are necessary to approve the Reorganization Agreement?

      The  affirmative  vote of the holders of a majority of the total number of
shares of Main Street California Municipal Fund outstanding and entitled to vote
is  necessary  to approve  the  Reorganization  Agreement  and the  transactions
contemplated  thereby.  Each  shareholder  will be entitled to one vote for each
full  share,  and a  fractional  vote for each  fractional  share of Main Street
California  Municipal  Fund held on the  Record  Date.  If  sufficient  votes to
approve the proposal  are not  received by the date of the Meeting,  the Meeting
may be adjourned to permit  further  solicitation  of proxies.  The holders of a
majority  of shares  entitled to vote at the Meeting and present in person or by
proxy (whether or not sufficient to constitute a quorum) may adjourn the Meeting
to permit further solicitation of proxies.

How do I ensure my vote is accurately recorded?

      You can vote in either of two ways:

o     By mail, with the enclosed proxy card.
o     In person at the Meeting.

A proxy card is, in essence, a ballot. If you simply sign and date the proxy but
give  no  voting  instructions,  your  shares  will be  voted  in  favor  of the
Reorganization Agreement.

Can I revoke my proxy?

      Yes.  You may  revoke  your  proxy at any time  before  it is voted by (i)
writing to the Secretary of Main Street California  Municipal Fund at 6803 South
Tucson Way,  Englewood,  Colorado  80112 (if received in time to be acted upon);
(ii) attending the Meeting and voting in person;  or (iii) signing and returning
a later-dated proxy (if returned and received in time to be voted).

What other matters will be voted upon at the Meeting?

      The Board of Directors of the Company on behalf of Main Street  California
Municipal  Fund does not intend to bring any matters  before the  Meeting  other
than those  described in this proxy.  It is not aware of any other matters to be
brought before the Meeting by others.  If any other matters  legally come before
the Meeting,  the proxy ballot confers  discretionary  authority with respect to
such  matters,  and it is the  intention  of the person named to vote proxies to
vote in accordance with their judgment in such matters.

Who is entitled to vote?

      Shareholders  of record of Main Street  California  Municipal  Fund at the
close of  business on August 16,  2000 (the  "record  date") will be entitled to
vote at the  Meeting.  On the record  date,  there were  __________  outstanding
shares of Main Street California  Municipal Fund,  consisting of _______________
Class A shares and ______________ Class B shares. On the record date, there were
___________  outstanding  shares of  California  Municipal  Fund,  consisting of
_____________ Class A shares, _____________ Class B shares and ___________ Class
C  shares.  Under  relevant  state  law and  the  Company's  charter  documents,
abstentions  and broker  non-votes  will be included for purposes of determining
whether a quorum is  present  at the  Meeting,  but will be treated as votes not
cast and, therefore, will not be counted for purposes of determining whether the
matters to be voted upon at the Meeting have been approved.  For purposes of the
Meeting,  a majority of shares  outstanding  and  entitled  to vote,  present in
person or represented by proxy, constitutes a quorum.  California Municipal Fund
shareholders do not vote on the Reorganization.

What other solicitations will be made?

      Main Street California  Municipal Fund will request  broker-dealer  firms,
custodians, nominees and fiduciaries to forward proxy material to the beneficial
owners of the  shares of  record.  Main  Street  California  Municipal  Fund may
reimburse  broker-dealer firms,  custodians,  nominees and fiduciaries for their
reasonable  expenses  incurred in connection  with such proxy  solicitation.  In
addition to solicitations by mail, officers of Main Street California  Municipal
Fund or officers and employees of OppenheimerFunds  Services, without extra pay,
may conduct  additional  solicitations  personally or by telephone or telegraph.
Any expenses so incurred will be borne by OppenheimerFunds Services. Proxies may
also be solicited by a proxy  solicitation  firm hired at Main Street California
Municipal Fund's expense.

      Shares  owned  of  record  by  broker-dealers  for the  benefit  of  their
customers ("street account shares") will be voted by the broker-dealer  based on
instructions received from its customers.  If no instructions are received,  and
the broker-dealer does not have discretionary  power to vote such street account
shares under  applicable stock exchange rules,  the shares  represented  thereby
will be considered to be present at the Meeting for purposes of determining  the
quorum, but will have the same effect as a vote "against" the Proposal.

Are there appraisal rights?

      No. Under the 1940 Act,  shareholders do not have rights of appraisal as a
result of the  Reorganization.  Although  appraisal rights are unavailable,  you
have the right to redeem your shares at net asset value until the closing  date.
After the closing date, you may redeem your new California Municipal Fund shares
or  exchange  them into shares of certain  other  funds in the  OppenheimerFunds
complex, subject to the terms of the prospectus of the fund being acquired.

                       INFORMATION ABOUT CALIFORNIA MUNICIPAL FUND

      Information about California  Municipal Fund is included in the California
Municipal Fund's Prospectus,  which is attached to and considered a part of this
Proxy  Statement  and  Prospectus.   Additional   information  about  California
Municipal  Fund  is  included  in  California   Municipal  Fund's  Statement  of
Additional  Information  dated  November 22, 1999,  Annual Report dated July 31,
1999 and Semi-Annual  Report dated January 31, 2000,  which have been filed with
the SEC and are incorporated herein by reference. You may request a free copy of
these materials and other information by calling 1.800.525.7048 or by writing to
California Municipal Fund at OppenheimerFunds  Services,  P.O. Box 5270, Denver,
CO 80217.  California  Municipal  Fund also files proxy  materials,  reports and
other information with the SEC in accordance with the informational requirements
of the Securities and Exchange Act of 1934 and the 1940 Act. These materials can
be inspected and copied at: the SEC's Public Reference Room in Washington,  D.C.
(Phone:  1.202.942.8090)  or the EDGAR database on the SEC's Internet website at
http:\\www.sec.gov.  Copies may be obtained upon payment of a duplicating fee by
electronic request at the SEC's e-mail address: [email protected] or by writing
to the SEC's Public Reference Section, Washington, D.C. 20549-0102.

                 INFORMATION ABOUT MAIN STREET CALIFORNIA MUNICIPAL FUND

      Information about Main Street California Municipal Fund is included in the
current Main Street California  Municipal Fund's  Prospectus.  This document has
been filed with the SEC and is  incorporated  by  reference  herein.  Additional
information about Main Street California  Municipal Fund is also included in the
Fund's Statement of Additional Information,  Annual Report dated August 31, 1999
and Semi-Annual  Report dated February 29, 2000,  which have been filed with the
SEC and are  incorporated  by reference  herein.  You may request free copies of
these or other documents relating to Main Street California Municipal by calling
1.800.525.7048  or by  writing  to  OppenheimerFunds  Services,  P.O.  Box 5270,
Denver, CO 80217.  Reports and other information filed by Main Street California
Municipal  Fund can be inspected and copied at: the SEC's Public  Reference Room
in Washington,  D.C. (Phone:  1.202.942.8090) or the EDGAR database on the SEC's
Internet web-site at http:\\www.sec.gov.  Copies may be obtained upon payment of
a  duplicating   fee  by  electronic   request  at  the  SEC's  e-mail  address:
[email protected]  or  by  writing  to  the  SEC's  Public  Reference  Section,
Washington, D.C. 20549-0102.

                                  PRINCIPAL SHAREHOLDERS

      As of the record date,  the officers  and  Directors of the Company,  as a
group,  owned  less than 1% of the  outstanding  voting  shares  of Main  Street
California  Municipal  Fund and California  Municipal  Fund. To the knowledge of
Main Street  California  Municipal  Fund,  no person owned  (beneficially  or of
record) 5% or more of the outstanding shares of Main Street California Municipal
Fund.  To  the  knowledge  of  California   Municipal   Fund,  no  person  owned
(beneficially  or of record) 5% or more of the outstanding  shares of California
Municipal  Fund  except  for  Merril  Lynch  Pierce  Fenner & Smith for the sole
benefit of its customers, 4800 Deer Lake Drive, Jacksonville, FL 32446, who held
_____________  or ___% of the outstanding  Class B shares and  _____________  or
___% of the outstanding Class C shares.


By Order of the Board of Directors


Andrew J. Donohue, Secretary

September 6, 2000




<PAGE>



                         EXHIBITS TO THE COMBINED PROXY
                            STATEMENT AND PROSPECTUS

Exhibit

A    Agreement and Plan of Reorganization between Oppenheimer Main Street Funds,
     Inc. on behalf of Oppenheimer Main Street California Municipal Fund and
     Oppenheimer California Municipal Fund






<PAGE>


                                                                       EXHIBIT A



                      AGREEMENT AND PLAN OF REORGANIZATION



          AGREEMENT AND PLAN OF  REORGANIZATION  (the  "Agreement")  dated as of
    ____________,  2000 by and between  Oppenheimer Main Street Funds, Inc. (the
    "Company")  on behalf of its  series,  Oppenheimer  Main  Street  California
    Municipal  Fund  ("Main  Street  California  Municipal  Fund"),  a  Maryland
    Corporation and Oppenheimer California Municipal Fund ("California Municipal
    Fund"), a Massachusetts business trust.

                                 W I T N E S S E T H:

     WHEREAS,  the  parties  are  each  open-end  investment  companies  of  the
management type; and

          WHEREAS,  the parties hereto desire to provide for the  reorganization
    pursuant to Section  368(a)(1)  of the  Internal  Revenue  Code of 1986,  as
    amended (the "Code"),  of Main Street California  Municipal Fund through the
    acquisition by California  Municipal Fund of substantially all of the assets
    of Main Street  California  Municipal Fund in exchange for the voting shares
    of  beneficial  interest  ("shares")  of  Class  A and  Class  B  shares  of
    California Municipal Fund and the assumption by California Municipal Fund of
    certain liabilities of Main Street California  Municipal Fund, which Class A
    and Class B shares of California  Municipal  Fund are to be  distributed  by
    Main  Street  California  Municipal  Fund  pro rata to its  shareholders  in
    complete  liquidation of Main Street California  Municipal Fund and complete
    cancellation of its shares;

          NOW,  THEREFORE,  in  consideration  of  the  mutual  promises  herein
    contained, the parties hereto agree as follows:

          1.  The  parties  hereto  hereby  adopt  this  Agreement  and  Plan of
    Reorganization  (the "Agreement")  pursuant to Section 368(a)(1) of the Code
    as follows:  The  reorganization  will be  comprised of the  acquisition  by
    California  Municipal Fund of substantially all of the assets of Main Street
    California  Municipal  Fund in  exchange  for  Class A and Class B shares of
    California Municipal Fund and the assumption by California Municipal Fund of
    certain  liabilities of Main Street California  Municipal Fund,  followed by
    the distribution of such Class A and Class B shares of California  Municipal
    Fund to the  Class A and  Class B  shareholders  of Main  Street  California
    Municipal  Fund in  exchange  for  their  Class A and Class B shares of Main
    Street  California  Municipal Fund, all upon and subject to the terms of the
    Agreement hereinafter set forth.

                The share  transfer  books of Main Street  California  Municipal
    Fund will be  permanently  closed at the close of business on the  Valuation
    Date (as  hereinafter  defined)  and only  redemption  requests  received in
    proper form on or prior to the close of business on the Valuation Date shall
    be fulfilled by Main Street California  Municipal Fund;  redemption requests
    received by Main Street  California  Municipal Fund after that date shall be
    treated as requests for the redemption of the shares of California Municipal
    Fund to be distributed to the shareholder in question as provided in Section
    5 hereof.


      2. On the Closing Date (as hereinafter defined), all of the assets of Main
    Street California Municipal Fund on that date, excluding a cash reserve (the
    "Cash  Reserve")  to be retained by Main Street  California  Municipal  Fund
    sufficient in its  discretion for the payment of the expenses of Main Street
    California  Municipal  Fund's  dissolution and its  liabilities,  but not in
    excess of the amount  contemplated  by Section  10E,  shall be  delivered as
    provided in Section 8 to  California  Municipal  Fund,  in exchange  for and
    against  delivery  to the  Company  on  behalf  of  Main  Street  California
    Municipal Fund on the Closing Date of a number of Class A and Class B shares
    of California  Municipal Fund,  having an aggregate net asset value equal to
    the  value  of the  assets  of  Main  Street  California  Municipal  Fund so
    transferred and delivered.

      3.  The net  asset  value  of Class A and  Class B  shares  of  California
    Municipal  Fund  and the  value  of the  assets  of Main  Street  California
    Municipal Fund to be transferred  shall in each case be determined as of the
    close of business of The New York Stock Exchange on the Valuation  Date. The
    computation  of the net  asset  value of the  Class A and  Class B shares of
    California  Municipal Fund and the Class A and Class B shares of Main Street
    California  Municipal  Fund shall be done in the manner  used by  California
    Municipal Fund and Main Street California Municipal Fund,  respectively,  in
    the  computation  of such net  asset  value  per share as set forth in their
    respective  prospectuses.  The methods used by California  Municipal Fund in
    such  computation  shall be applied to the  valuation  of the assets of Main
    Street California  Municipal Fund to be transferred to California  Municipal
    Fund.

            Main  Street  California  Municipal  Fund  shall  declare  and  pay,
    immediately  prior to the  Valuation  Date, a dividend or  dividends  which,
    together  with  all  previous  such  dividends,  shall  have the  effect  of
    distributing to Main Street California  Municipal Fund's shareholders all of
    Main Street California  Municipal Fund's  investment  company taxable income
    for taxable years ending on or prior to the Closing Date  (computed  without
    regard to any  dividends  paid)  and all of its net  capital  gain,  if any,
    realized  in taxable  years  ending on or prior to the  Closing  Date (after
    reduction for any capital loss carry-forward).

      4.   The   closing   (the   "Closing")   shall  be  at  the   offices   of
    OppenheimerFunds,  Inc. (the "Agent"),  Two World Trade Center,  34th Floor,
    New York, New York 10048, at 4:00 P.M. New York time on  _______________  or
    at such other time or place as the  parties  may  designate  or as  provided
    below (the "Closing  Date").  The business day preceding the Closing Date is
    herein referred to as the "Valuation Date."

            In the event that on the Valuation  Date either party has,  pursuant
    to the Investment  Company Act of 1940, as amended (the "Act"), or any rule,
    regulation or order  thereunder,  suspended the  redemption of its shares or
    postponed payment  therefore,  the Closing Date shall be postponed until the
    first  business  day  after  the date when both  parties  have  ceased  such
    suspension or postponement; provided, however, that if such suspension shall
    continue for a period of 60 days beyond the Valuation  Date,  then the other
    party to the Agreement shall be permitted to terminate the Agreement without
    liability to either party for such termination.

    5. In conjunction with the Closing,  Main Street  California  Municipal Fund
    shall  distribute  on a pro rata basis to the  shareholders  of Main  Street
    California  Municipal  Fund as of the  Valuation  Date  Class A and  Class B
    shares of  California  Municipal  Fund  received by Main  Street  California
    Municipal Fund on the Closing Date in exchange for the assets of Main Street
    California  Municipal Fund in complete liquidation of Main Street California
    Municipal  Fund;  for  the  purpose  of  the  distribution  by  Main  Street
    California  Municipal  Fund of  Class A and  Class B  shares  of  California
    Municipal  Fund to Main Street  California  Municipal  Fund's  shareholders,
    California  Municipal  Fund will promptly  cause its transfer  agent to: (a)
    credit an  appropriate  number  of Class A and Class B shares of  California
    Municipal Fund on the books of California Municipal Fund to each Class A and
    Class B shareholder of Main Street  California  Municipal Fund in accordance
    with a list (the  "Shareholder  List") of Main Street  California  Municipal
    Fund shareholders  received from Main Street California  Municipal Fund; and
    (b)  confirm  an  appropriate  number  of  Class  A and  Class B  shares  of
    California  Municipal  Fund to each Class A and Class B shareholder  of Main
    Street  California  Municipal  Fund;  certificates  for  Class A and Class B
    shares of California Municipal Fund will be issued upon written request of a
    former  shareholder  of Main Street  California  Municipal Fund but only for
    whole shares, with fractional shares credited to the name of the shareholder
    on the books of California Municipal Fund.

            The Shareholder List shall indicate,  as of the close of business on
    the Valuation Date, the name and address of each  shareholder of Main Street
    California Municipal Fund,  indicating his or her share balance. Main Street
    California   Municipal  Fund  agrees  to  supply  the  Shareholder  List  to
    California  Municipal Fund not later than the Closing Date.  Shareholders of
    Main Street  California  Municipal  Fund holding  certificates  representing
    their shares shall not be required to surrender their certificates to anyone
    in connection with the  reorganization.  After the Closing Date, however, it
    will be necessary for such  shareholders to surrender their  certificates in
    order to redeem,  transfer or pledge the shares of California Municipal Fund
    which they received.

      6. Within one year after the Closing  Date,  the Company on behalf of Main
    Street California  Municipal Fund shall (a) either pay or make provision for
    payment of all of its liabilities and taxes, and (b) either (i) transfer any
    remaining  amount of the Cash Reserve to California  Municipal Fund, if such
    remaining  amount (as reduced by the estimated  cost of  distributing  it to
    shareholders)  is not material (as defined  below) or (ii)  distribute  such
    remaining  amount to the  shareholders of Main Street  California  Municipal
    Fund on the  Valuation  Date.  Such  remaining  amount shall be deemed to be
    material if the amount to be  distributed,  after deduction of the estimated
    expenses of the  distribution,  equals or exceeds one cent per share of Main
    Street California Municipal Fund outstanding on the Valuation Date.

      7. Prior to the  Closing  Date,  there shall be  coordination  between the
    parties  as to their  respective  portfolios  so that,  after  the  Closing,
    California  Municipal Fund will be in compliance  with all of its investment
    policies and  restrictions.  At the  Closing,  the Company on behalf of Main
    Street California  Municipal Fund shall deliver to California Municipal Fund
    two copies of a list setting forth the securities  then owned by Main Street
    California Municipal Fund. Promptly after the Closing, the Company on behalf
    of Main Street California  Municipal Fund shall provide California Municipal
    Fund a list setting forth the respective federal income tax bases thereof.

      8.  Portfolio  securities  or written  evidence  acceptable  to California
    Municipal Fund of record  ownership  thereof by The Depository Trust Company
    or through the Federal  Reserve  Book Entry  System or any other  depository
    approved by Main Street California Municipal Fund pursuant to Rule 17f-4 and
    Rule 17f-5 under the Act shall be endorsed and delivered,  or transferred by
    appropriate  transfer or assignment  documents,  by the Company on behalf of
    Main Street  California  Municipal  Fund on the Closing  Date to  California
    Municipal  Fund, or at its direction,  to its custodian bank, in proper form
    for transfer in such  condition as to constitute  good  delivery  thereof in
    accordance  with the  custom  of  brokers  and shall be  accompanied  by all
    necessary state transfer stamps,  if any. The cash delivered shall be in the
    form of certified  or bank  cashiers'  checks or by bank wire or  intra-bank
    transfer  payable to the order of California  Municipal Fund for the account
    of  California  Municipal  Fund.  Class A and Class B shares  of  California
    Municipal  Fund  representing  the  number  of Class A and Class B shares of
    California  Municipal Fund being delivered against the assets of Main Street
    California Municipal Fund,  registered in the name of Main Street California
    Municipal  Fund,  shall be transferred to Main Street  California  Municipal
    Fund on the Closing  Date.  Such shares shall  thereupon be assigned by Main
    Street  California  Municipal Fund to its shareholders so that the shares of
    California Municipal Fund may be distributed as provided in Section 5.

      If, at the Closing Date, Main Street  California  Municipal Fund is unable
    to make delivery under this Section 8 to California Municipal Fund of any of
    its portfolio  securities or cash for the reason that any of such securities
    purchased by Main Street California  Municipal Fund, or the cash proceeds of
    a sale of portfolio securities,  prior to the Closing Date have not yet been
    delivered to it or Main Street California  Municipal Fund's custodian,  then
    the delivery requirements of this Section 8 with respect to said undelivered
    securities or cash will be waived and Main Street California  Municipal Fund
    will  deliver to  California  Municipal  Fund by or on the Closing Date with
    respect  to said  undelivered  securities  or  cash  executed  copies  of an
    agreement or agreements of assignment in a form  reasonably  satisfactory to
    California  Municipal Fund, together with such other documents,  including a
    due bill or due bills and brokers'  confirmation  slips as may reasonably be
    required by California Municipal Fund.

      9. California  Municipal Fund shall not assume the liabilities (except for
    portfolio  securities  purchased  which have not settled and for shareholder
    redemption  and  dividend  checks  outstanding)  of Main  Street  California
    Municipal   Fund,   but  Main  Street   California   Municipal   Fund  will,
    nevertheless,  use its best efforts to discharge all known  liabilities,  so
    far as may be possible,  prior to the Closing Date. The cost of printing and
    mailing  the  proxies  and  proxy  statements  will be borne by Main  Street
    California  Municipal  Fund.  Main  Street  California  Municipal  Fund  and
    California  Municipal  Fund  will  bear  the cost of  their  respective  tax
    opinion. Any documents such as existing  prospectuses or annual reports that
    are  included  in  that  mailing  will  be a cost of the  fund  issuing  the
    document.  Any other out-of-pocket expenses of California Municipal Fund and
    Main Street California  Municipal Fund associated with this  reorganization,
    including  legal,  accounting and transfer agent expenses,  will be borne by
    Main  Street  California  Municipal  Fund  and  California  Municipal  Fund,
    respectively, in the amounts so incurred by each.

      10. The  obligations of California  Municipal Fund hereunder  shall be
    subject to the following conditions:

      A. The  Board  of  Directors  of the  Company  on  behalf  of Main  Street
    California  Municipal  Fund,  shall have  authorized  the  execution  of the
    Agreement,  and the  shareholders of Main Street  California  Municipal Fund
    shall have approved the Agreement and the transactions  contemplated hereby,
    and the Company on behalf of Main  Street  California  Municipal  Fund shall
    have  furnished to California  Municipal  Fund copies of resolutions to that
    effect certified by the Secretary or the Assistant  Secretary of the Company
    on  behalf  of Main  Street  California  Municipal  Fund;  such  shareholder
    approval  shall have been by the  affirmative  vote required by the Maryland
    General  Corporation  Law and its charter  documents  at a meeting for which
    proxies  have been  solicited  by the Proxy  Statement  and  Prospectus  (as
    hereinafter defined).

      B.  California  Municipal  Fund shall have received an opinion dated as of
    the Closing Date from counsel to Main Street  California  Municipal Fund, to
    the effect that (i) the Company is a  corporation  duly  organized,  validly
    existing and in good  standing  under the laws of the State of Maryland with
    full corporate  powers to carry on its business as then being  conducted and
    to enter into and perform the Agreement;  and (ii) that all action necessary
    to  make  the  Agreement,   according  to  its  terms,  valid,  binding  and
    enforceable  on the  Company on behalf of Main Street  California  Municipal
    Fund and to  authorize  effectively  the  transactions  contemplated  by the
    Agreement have been taken by the Company on behalf of Main Street California
    Municipal Fund. Maryland counsel may be relied upon for this opinion.

      C. The  representations  and  warranties  of the Company on behalf of Main
    Street California  Municipal Fund contained herein shall be true and correct
    at and as of the Closing Date, and California Municipal Fund shall have been
    furnished with a certificate of the President,  or a Vice President,  or the
    Secretary  or the  Assistant  Secretary  or the  Treasurer  of  Main  Street
    California Municipal Fund, dated the Closing Date, to that effect.

D.    On the Closing  Date,  Main Street  California  Municipal  Fund shall have
      furnished to California  Municipal  Fund a certificate of the Treasurer or
      Assistant  Treasurer  of the Company on behalf of Main  Street  California
      Municipal  Fund as to the amount of the capital  loss  carry-over  and net
      unrealized  appreciation  or  depreciation,  if any,  with respect to Main
      Street California Municipal Fund as of the Closing Date.

      E. The Cash  Reserve  shall not exceed 10% of the value of the net assets,
      nor 30% in value of the gross assets, of Main Street California  Municipal
      Fund at the close of business on the Valuation Date.

      F. A  Registration  Statement on Form N-14 filed by  California  Municipal
    Fund  under  the  Securities  Act of 1933,  as  amended  (the  "1933  Act"),
    containing a preliminary  form of the Proxy Statement and Prospectus,  shall
    have become effective under the 1933 Act.

      G. On the Closing Date,  California  Municipal  Fund shall have received a
    letter  of  Andrew  J.  Donohue  or  other  senior   executive   officer  of
    OppenheimerFunds, Inc. acceptable to California Municipal Fund, stating that
    nothing has come to his or her attention  which in his or her judgment would
    indicate  that as of the  Closing  Date there were any  material,  actual or
    contingent  liabilities of Main Street California Municipal Fund arising out
    of  litigation  brought  against Main Street  California  Municipal  Fund or
    claims  asserted  against  it,  or  pending  or to  the  best  of his or her
    knowledge  threatened claims or litigation not reflected in or apparent from
    the most recent audited  financial  statements and footnotes thereto of Main
    Street  California  Municipal Fund delivered to California  Municipal  Fund.
    Such letter may also  include  such  additional  statements  relating to the
    scope of the review conducted by such person and his or her responsibilities
    and liabilities as are not unreasonable under the circumstances.

          H. California Municipal Fund shall have received an opinion, dated the
     Closing Date,  of KPMG LLP, to the same effect as the opinion  contemplated
     by Section 11.E. of the Agreement.

      I. California Municipal Fund shall have received at the Closing all of the
    assets of Main Street  California  Municipal Fund to be conveyed  hereunder,
    which  assets shall be free and clear of all liens,  encumbrances,  security
    interests, restrictions and limitations whatsoever.

          11. The obligations of Main Street California Municipal Fund hereunder
     shall be subject to the following conditions:

      A.  The  Board  of  Trustees  of  California  Municipal  Fund  shall  have
    authorized the execution of the Agreement, and the transactions contemplated
    thereby,  and California  Municipal Fund shall have furnished to Main Street
    California  Municipal Fund copies of resolutions to that effect certified by
    the Secretary or the Assistant Secretary of California Municipal Fund.

      B.  Main  Street  California  Municipal  Fund's  shareholders  shall  have
    approved the  Agreement  and the  transactions  contemplated  hereby,  by an
    affirmative  vote required by the Maryland  General  Corporation Law and its
    charter  documents  and Main  Street  California  Municipal  Fund shall have
    furnished  California  Municipal  Fund copies of  resolutions to that effect
    certified  by  the  Secretary  or an  Assistant  Secretary  of  Main  Street
    California Municipal Fund.

      C. Main Street  California  Municipal  Fund shall have received an opinion
    dated as of the Closing Date from counsel to California  Municipal  Fund, to
    the effect  that (i)  California  Municipal  Fund is a  business  trust duly
    organized,  validly  existing  and in good  standing  under  the laws of the
    Commonwealth of  Massachusetts  with full powers to carry on its business as
    then being  conducted and to enter into and perform the Agreement;  (ii) all
    action  necessary  to make the  Agreement,  according  to its terms,  valid,
    binding and  enforceable  upon  California  Municipal  Fund and to authorize
    effectively the  transactions  contemplated by the Agreement have been taken
    by California  Municipal Fund, and (iii) the shares of California  Municipal
    Fund to be issued  hereunder  are duly  authorized  and when  issued will be
    validly issued, fully-paid and non-assessable.  Massachusetts counsel may be
    relied upon for this opinion.

      D.  The  representations  and  warranties  of  California  Municipal  Fund
    contained  herein  shall be true and correct at and as of the Closing  Date,
    and Main Street  California  Municipal Fund shall have been furnished with a
    certificate  of the  President,  a Vice  President  or the  Secretary or the
    Assistant  Secretary or the  Treasurer of the Trust to that effect dated the
    Closing Date.

      E. Main Street California Municipal Fund shall have received an opinion of
    KPMG LLP to the effect that the federal tax consequences of the transaction,
    if carried out in the manner  outlined in the  Agreement  and in  accordance
    with (i) Main Street California  Municipal Fund's  representation that there
    is no plan  or  intention  by any  Main  Street  California  Municipal  Fund
    shareholder who owns 5% or more of Main Street  California  Municipal Fund's
    outstanding  shares,  and, to Main Street  California  Municipal Fund's best
    knowledge,  there is no plan or intention on the part of the remaining  Main
    Street California Municipal Fund shareholders,  to redeem, sell, exchange or
    otherwise  dispose of a number of California  Municipal Fund shares received
    in the transaction that would reduce Main Street  California  Municipal Fund
    shareholders'  ownership of California  Municipal Fund shares to a number of
    shares having a value, as of the Closing Date, of less than 50% of the value
    of all of the formerly  outstanding  Main Street  California  Municipal Fund
    shares  as of the same  date,  and (ii) the  representation  by each of Main
    Street California  Municipal Fund and California  Municipal Fund that, as of
    the Closing  Date,  Main Street  California  Municipal  Fund and  California
    Municipal Fund will qualify as regulated  investment  companies or will meet
    the diversification test of Section 368(a)(2)(F)(ii) of the Code, will be as
    follows:

      1. The  transactions  contemplated  by the  Agreement  will  qualify  as a
    tax-free  "reorganization"  within the meaning of Section  368(a)(1)  of the
    Code, and under the regulations promulgated thereunder.

      2. Main Street  California  Municipal Fund and  California  Municipal Fund
    will each  qualify as a "party to a  reorganization"  within the  meaning of
    Section 368(b)(2) of the Code.

      3. No gain or loss will be recognized by the  shareholders  of Main Street
    California  Municipal  Fund  upon the  distribution  of Class A and  Class B
    shares  of  beneficial   interest  in  California   Municipal  Fund  to  the
    shareholders  of Main Street  California  Municipal Fund pursuant to Section
    354 of the Code.

      4. Under Section  361(a) of the Code no gain or loss will be recognized by
    Main  Street  California  Municipal  Fund  by  reason  of  the  transfer  of
    substantially  all its assets in exchange  for Class A and Class B shares of
    California Municipal Fund.

      5. Under  Section 1032 of the Code no gain or loss will be  recognized  by
    California  Municipal Fund by reason of the transfer of substantially all of
    Main Street  California  Municipal Fund's assets in exchange for Class A and
    Class B shares of California  Municipal Fund and California Municipal Fund's
    assumption of certain liabilities of Main Street California Municipal Fund.

      6. The shareholders of Main Street California Municipal Fund will have the
    same tax  basis  and  holding  period  for the Class A and Class B shares of
    beneficial  interest in California  Municipal Fund that they receive as they
    had for Main Street  California  Municipal Fund shares that they  previously
    held, pursuant to Section 358(a) and 1223(1), respectively, of the Code.

      7. The  securities  transferred  by the  Company on behalf of Main  Street
    California  Municipal  Fund to California  Municipal Fund will have the same
    tax basis and holding  period in the hands of California  Municipal  Fund as
    they had for Main  Street  California  Municipal  Fund,  pursuant to Section
    362(b) and 1223(1), respectively, of the Code.

      F. The Cash  Reserve  shall not exceed 10% of the value of the net assets,
    nor 30% in value of the gross assets,  of Main Street  California  Municipal
    Fund at the close of business on the Valuation Date.

      G. A  Registration  Statement on Form N-14 filed by  California  Municipal
    Fund  under  the  1933  Act,  containing  a  preliminary  form of the  Proxy
    Statement and Prospectus, shall have become effective under the 1933 Act.

      H. On the Closing Date, Main Street  California  Municipal Fund shall have
    received a letter of Andrew J. Donohue or other senior executive  officer of
    OppenheimerFunds,  Inc. acceptable to Main Street California Municipal Fund,
    stating  that nothing has come to his or her  attention  which in his or her
    judgment would indicate that as of the Closing Date there were any material,
    actual or contingent liabilities of California Municipal Fund arising out of
    litigation  brought  against  California  Municipal Fund or claims  asserted
    against it, or pending or, to the best of his or her  knowledge,  threatened
    claims or litigation not reflected in or apparent by the most recent audited
    financial  statements  and footnotes  thereto of California  Municipal  Fund
    delivered to Main Street  California  Municipal  Fund.  Such letter may also
    include  such  additional  statements  relating  to the scope of the  review
    conducted by such person and his or her  responsibilities and liabilities as
    are not unreasonable under the circumstances.

      I. The Company on behalf of Main Street  California  Municipal  Fund shall
    acknowledge  receipt  of the  Class  A and  Class  B  shares  of  California
    Municipal Fund.

          12. The Company on behalf of Main  Street  California  Municipal  Fund
     hereby represents and warrants that:

      A. The financial statements of Main Street California Municipal Fund as of
    August 31, 1999 (audited) heretofore furnished to California Municipal Fund,
    present fairly the financial position, results of operations, and changes in
    net assets of Main  Street  California  Municipal  Fund as of that date,  in
    conformity with generally accepted accounting  principles applied on a basis
    consistent  with the preceding  year;  and that from August 31, 1999 through
    the date hereof there have not been, and through the Closing Date there will
    not be, any material  adverse change in the business or financial  condition
    of Main Street California Municipal Fund, it being agreed that a decrease in
    the size of Main Street California Municipal Fund due to a diminution in the
    value  of its  portfolio  and/or  redemption  of  its  shares  shall  not be
    considered a material adverse change;

B.    Contingent   upon  approval  of  the   Agreement   and  the   transactions
      contemplated   thereby  by  Main  Street   California   Municipal   Fund's
      shareholders,  the Company on behalf of Main Street  California  Municipal
      Fund has authority to transfer all of the assets of Main Street California
      Municipal  Fund to be  conveyed  hereunder  free and  clear of all  liens,
      encumbrances, security interests, restrictions and limitations whatsoever;

C.   The Prospectus, as amended and supplemented,  contained in the Company's
     Registration Statement under the 1933 Act, as amended, is true, correct and
     complete, conforms to the requirements of the 1933 Act and does not contain
     any untrue  statement of a material  fact or omit to state a material  fact
     required to be stated therein or necessary to make the  statements  therein
     not misleading. The Registration Statement, as amended, was, as of the date
     of the  filing of the last  Post-Effective  Amendment,  true,  correct  and
     complete, conformed to the requirements of the 1933 Act and did not contain
     any untrue  statement of a material  fact or omit to state a material  fact
     required to be stated therein or necessary to make the  statements  therein
     not misleading;

      D. There is no material  contingent  liability  of Main Street  California
    Municipal Fund and no material claim and no material  legal,  administrative
    or other proceedings  pending or, to the knowledge of Main Street California
    Municipal Fund,  threatened  against Main Street California  Municipal Fund,
    not reflected in such Prospectus;

          E.  Except  for  the  Agreement,   there  are  no  material  contracts
     outstanding to which Main Street California Municipal Fund is a party other
     than those ordinary in the conduct of its business;

      F. The Company is a Maryland corporation duly organized,  validly existing
    and in good  standing  under the laws of the State of Maryland;  and has all
    necessary and material  Federal and state  authorizations  to own all of its
    assets and to carry on its business as now being conducted;  and Main Street
    California Municipal Fund is a series of the Company that is duly registered
    under the Act and such registration has not been rescinded or revoked and is
    in full force and effect;

      G. All Federal and other tax returns and reports of Main Street California
    Municipal Fund required by law to be filed have been filed,  and all federal
    and other  taxes shown due on said  returns  and  reports  have been paid or
    provision  shall have been made for the  payment  thereof and to the best of
    the knowledge of the Company on behalf of Main Street  California  Municipal
    Fund no such  return is  currently  under audit and no  assessment  has been
    asserted  with  respect to such  returns  and to the extent such tax returns
    with respect to the taxable year of Main Street  California  Municipal  Fund
    ended  August 31, 1999 have not been filed,  such returns will be filed when
    required and the amount of tax shown as due thereon  shall be paid when due;
    and

      H. The  Company on behalf of Main  Street  California  Municipal  Fund has
    elected that Main Street California Municipal Fund be treated as a regulated
    investment company and, for each fiscal year of its operations,  Main Street
    California  Municipal Fund has met the  requirements  of Subchapter M of the
    Code for qualification and treatment as a regulated  investment  company and
    Main Street California Municipal Fund intends to meet such requirements with
    respect to its current taxable year.

13.   California Municipal Fund hereby represents and warrants that:

A.   The financial  statements of  California  Municipal  Fund as at July 31,
     1999 (audited)  heretofore  furnished to Main Street  California  Municipal
     Fund,  present fairly the financial  position,  results of operations,  and
     changes in net assets of  California  Municipal  Fund,  as of that date, in
     conformity with generally accepted accounting principles applied on a basis
     consistent with the preceding year; and that from July 31, 1999 through the
     date hereof  there have not been,  and through the Closing  Date there will
     not be, any material adverse changes in the business or financial condition
     of California  Municipal  Fund, it being  understood that a decrease in the
     size of California  Municipal  Fund due to a diminution in the value of its
     portfolio  and/or  redemption  of its  shares  shall  not be  considered  a
     material or adverse change;

B.   The  Prospectus,  as amended and  supplemented,  contained in California
     Municipal  Fund's  Registration  Statement  under  the 1933  Act,  is true,
     correct and complete, conforms to the requirements of the 1933 Act and does
     not  contain  any untrue  statement  of a material  fact or omit to state a
     material  fact  required  to be stated  therein  or  necessary  to make the
     statements therein not misleading.  The Registration Statement, as amended,
     was,  as of the date of the  filing of the last  Post-Effective  Amendment,
     true,  correct and complete,  conformed to the requirements of the 1933 Act
     and did not  contain  any untrue  statement  of a material  fact or omit to
     state a material  fact  required to be stated  therein or necessary to make
     the statements therein not misleading;

      C. Except for this Agreement, there is no material contingent liability of
    California  Municipal  Fund and no  material  claim and no  material  legal,
    administrative  or  other  proceedings  pending  or,  to  the  knowledge  of
    California Municipal Fund, threatened against California Municipal Fund, not
    reflected in such Prospectus;

          D. There are no material  contracts  outstanding  to which  California
     Municipal  Fund is a party other than those  ordinary in the conduct of its
     business;

      E. California  Municipal Fund is a business trust duly organized,  validly
    existing  and in  good  standing  under  the  laws  of the  Commonwealth  of
    Massachusetts;  California  Municipal  Fund has all  necessary  and material
    Federal and state authorizations to own all its properties and assets and to
    carry on its business as now being conducted; the Class A and Class B shares
    of  California  Municipal  Fund which it issues to the  Company on behalf of
    Main Street California Municipal Fund pursuant to the Agreement will be duly
    authorized,  validly issued, fully-paid and non-assessable,  will conform to
    the   description   thereof   contained  in  California   Municipal   Fund's
    Registration Statement and will be duly registered under the 1933 Act and in
    the states where registration is required;  and California Municipal Fund is
    duly registered under the Act and such  registration has not been revoked or
    rescinded and is in full force and effect;

E.   All federal and other tax  returns and reports of  California  Municipal
     Fund required by law to be filed have been filed, and all federal and other
     taxes shown due on said  returns and  reports  have been paid or  provision
     shall  have  been  made  for the  payment  thereof  and to the  best of the
     knowledge of California  Municipal  Fund no such return is currently  under
     audit and no assessment  has been asserted with respect to such returns and
     to the  extent  such  tax  returns  with  respect  to the  taxable  year of
     California  Municipal  Fund ended July 31, 1999 have not been  filed,  such
     returns  will be filed  when  required  and the  amount of tax shown as due
     thereon shall be paid when due;

      G.  California  Municipal  Fund has  elected to be treated as a  regulated
    investment  company and, for each fiscal year of its operations,  California
    Municipal  Fund has met the  requirements  of  Subchapter  M of the Code for
    qualification and treatment as a regulated investment company and California
    Municipal Fund intends to meet such requirements with respect to its current
    taxable year;

      H.  California  Municipal  Fund has no plan or intention (i) to dispose of
    any of the assets  transferred  by Main Street  California  Municipal  Fund,
    other  than in the  ordinary  course  of  business,  or (ii)  to  redeem  or
    reacquire  any of  the  Class  A and  Class  B  shares  issued  by it in the
    reorganization other than pursuant to valid requests of shareholders; and

          I.  After  consummation  of  the  transactions   contemplated  by  the
     Agreement,  California  Municipal Fund intends to operate its business in a
     substantially unchanged manner.

      14. Each party hereby represents to the other that no broker or finder has
    been  employed  by it with  respect  to the  Agreement  or the  transactions
    contemplated  hereby.  Each party also  represents and warrants to the other
    that the  information  concerning it in the Proxy  Statement and  Prospectus
    will not as of its date contain any untrue  statement of a material  fact or
    omit to state a fact necessary to make the statements  concerning it therein
    not misleading and that the financial statements  concerning it will present
    the  information   shown  fairly  in  accordance  with  generally   accepted
    accounting principles applied on a basis consistent with the preceding year.
    Each party also  represents  and warrants to the other that the Agreement is
    valid,  binding and  enforceable  in accordance  with its terms and that the
    execution,  delivery and performance of the Agreement will not result in any
    violation of, or be in conflict with, any provision of any charter, by-laws,
    contract, agreement,  judgment, decree or order to which it is subject or to
    which it is a party.  California  Municipal  Fund hereby  represents  to and
    covenants  with  Main  Street   California   Municipal  Fund  that,  if  the
    reorganization becomes effective,  California Municipal Fund will treat each
    shareholder  of Main Street  California  Municipal  Fund who received any of
    California  Municipal  Fund's  shares as a result of the  reorganization  as
    having made the minimum initial  purchase of shares of California  Municipal
    Fund  received  by such  shareholder  for the  purpose of making  additional
    investments in shares of California Municipal Fund,  regardless of the value
    of the shares of California Municipal Fund received.

      15.  California  Municipal  Fund  agrees  that it will  prepare and file a
    Registration Statement on Form N-14 under the 1933 Act which shall contain a
    preliminary form of proxy statement and prospectus  contemplated by Rule 145
    under the 1933 Act. The final form of such proxy statement and prospectus is
    referred to in the Agreement as the "Proxy Statement and  Prospectus."  Each
    party  agrees  that it will use its best  efforts to have such  Registration
    Statement  declared  effective  and to supply  such  information  concerning
    itself  for  inclusion  in the  Proxy  Statement  and  Prospectus  as may be
    necessary  or desirable  in this  connection.  The Company on behalf of Main
    Street  California  Municipal  Fund  covenants  and agrees to liquidate  and
    dissolve as soon as practicable to the extent required under the laws of the
    State of Maryland,  and,  upon  Closing,  to cause the  cancellation  of its
    outstanding shares.

      16. The obligations of the parties shall be subject to the right of either
    party to abandon and  terminate the Agreement for any reason and there shall
    be no liability  for damages or other  recourse  available to a party not so
    terminating  this  Agreement,  provided,  however,  that in the event that a
    party shall terminate this Agreement without  reasonable cause, the party so
    terminating  shall, upon demand,  reimburse the party not so terminating for
    all expenses,  including reasonable out-of-pocket expenses and fees incurred
    in connection with this Agreement.

      17. The Agreement may be executed in several  counterparts,  each of which
    shall be deemed an original,  but all taken  together  shall  constitute one
    Agreement.  The  rights  and  obligations  of  each  party  pursuant  to the
    Agreement shall not be assignable.

      18. All prior or contemporaneous agreements and representations are merged
    into the  Agreement,  which  constitutes  the entire  contract  between  the
    parties hereto.  No amendment or  modification  hereof shall be of any force
    and effect unless in writing and signed by the parties and no party shall be
    deemed  to have  waived  any  provision  herein  for its  benefit  unless it
    executes a written acknowledgment of such waiver.

      19.  California  Municipal Fund  understands  that the  obligations of the
    Company  on  behalf  of Main  Street  California  Municipal  Fund  under the
    Agreement  are not binding upon any Director or  shareholder  of Main Street
    California  Municipal Fund personally,  but bind only Main Street California
    Municipal Fund and Main Street California Municipal Fund's property.

      20.  The  Company  on  behalf of Main  Street  California  Municipal  Fund
    understands  that the  obligations  of California  Municipal  Fund under the
    Agreement  are not binding  upon any trustee or  shareholder  of  California
    Municipal  Fund  personally,  but bind only  California  Municipal  Fund and
    California  Municipal Fund's property.  The Company on behalf of Main Street
    California Municipal Fund represents that it has notice of the provisions of
    the   Declaration  of  Trust  of  California   Municipal  Fund   disclaiming
    shareholder  and trustee  liability  for acts or  obligations  of California
    Municipal Fund.

      IN WITNESS  WHEREOF,  each of the parties has caused the  Agreement  to be
    executed and attested by its officers  thereunto duly authorized on the date
    first set forth above.

            OPPENHEIMER MAIN STREET FUNDS, INC., on behalf of
            MAIN STREET CALIFORNIA MUNICIPAL FUND


                  By:_________________________________________
                        Andrew Donohue
                        Secretary

                  OPPENHEIMER  CALIFORNIA MUNICIPAL FUND


                  By: ________________________________________
                        Andrew J. Donohue
                        Secretary








<PAGE>


                  Oppenheimer Main Street California Municipal Fund
         Proxy For Special Shareholders Meeting To Be Held October 12, 2000

The undersigned shareholder of Oppenheimer Main Street California Municipal Fund
("Main  Street  California  Municipal  Fund"),  does  hereby  appoint  Andrew J.
Donohue,  Robert Bishop,  Scott Farrar and Brian W. Wixted, and each of them, as
attorneys-in-fact   and  proxies  of  the   undersigned,   with  full  power  of
substitution,  to attend the  Special  Meeting of  Shareholders  of Main  Street
California  Municipal  Fund to be held on October 12, 2000 at 6803 South  Tucson
Way,  Englewood,  Colorado at 10:00 A.M., Mountain time, and at all adjournments
thereof,  and to vote  the  shares  held in the name of the  undersigned  on the
record date for said meeting on the Proposal specified on the reverse side. Said
attorneys-in-fact  shall vote in  accordance  with their best judgment as to any
other matter.

This  proxy is  solicited  on  behalf  of the  Board of  Directors.  The  shares
represented  hereby will be voted as  indicated  on the reverse  side or for the
Proposal if no choice is indicated.

Please  mark your  proxy,  date and sign it on the  reverse  side and  return it
promptly in the  accompanying  envelope,  which requires no postage if mailed in
the United States.

The Proposal:

    To approve an  Agreement  and Plan of  Reorganization  between  Main  Street
    California  Municipal Fund, a series of Oppenheimer Main Street Funds, Inc.,
    and Oppenheimer California Municipal Fund ("California Municipal Fund"), and
    the  transactions  contemplated  thereby,  including  (a)  the  transfer  of
    substantially  all the assets of Main Street  California  Municipal  Fund to
    California  Municipal  Fund in  exchange  for  Class A and Class B shares of
    equal value of  Calfiornia  Municipal  Fund,  (b) the  distribution  of such
    shares of California Municipal Fund to the corresponding Class A and Class B
    shareholders   of  Main  Street   California   Municipal  Fund  in  complete
    liquidation   of  Main  Street   California   Municipal  Fund  and  (c)  the
    cancellation of the outstanding  shares of Main Street California  Municipal
    Fund.

            FOR______               AGAINST______           ABSTAIN_______

                              Dated: _________________________________, 2000
                                          (Month)                     (Day)

                                    ---------------------------------
                                                Signature(s)

                                    ---------------------------------
Signature(s)
Please read both sides of this ballot.


<PAGE>


NOTE:  PLEASE  SIGN  EXACTLY AS YOUR  NAME(S)  APPEAR  HEREON.  When  signing as
custodian,  attorney, executor,  administrator,  trustee, etc., please give your
full title as such.  All joint owners should sign this proxy.  If the account is
registered in the name of a  corporation,  partnership  or other entity,  a duly
authorized individual must sign on its behalf and give his or her title.



<PAGE>


Part B

                       STATEMENT OF ADDITIONAL INFORMATION
                          TO PROSPECTUS/PROXY STATEMENT



                          Acquisition of the Assets of the
                 OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

                        By and in exchange for Shares of the
                      OPPENHEIMER CALIFORNIA MUNICIPAL FUND


      This  Statement  of  Additional   Information  to  this   Prospectus/Proxy
Statement  (the  "SAI")  relates   specifically  to  the  proposed  delivery  of
substantially all of the assets of Oppenheimer Main Street California  Municipal
Fund  ("Main  Street  California  Municipal  Fund")  for  shares of  Oppenheimer
California Municipal Fund ("California Municipal Fund").

      This SAI  consists  of this Cover Page and the  following  documents:  (i)
Annual and  Semi-Annual  Reports  dated  August 31, 1999 and  February 29, 2000,
respectively,  of Main Street  California  Municipal  Fund;  (ii) the Annual and
Semi-Annual  Report dated July 31, 1999 and January 31, 2000,  respectively,  of
California Municipal Fund; (iii) the Statement of Additional Information of Main
Street California  Municipal Fund; (iv) the Statement of Additional  Information
of California Municipal Fund; and (v) the pro forma financial statements for the
period August 1, 1999 through March 31, 2000.

      This SAI is not a Prospectus; you should read this SAI in conjunction with
the   Prospectus/Proxy   Statement  dated  August  31,  2000,  relating  to  the
above-referenced  transaction.  You can  request a copy of the  Prospectus/Proxy
Statement by calling 1.800.525.7048 or by writing  OppenheimerFunds  Services at
P.O. Box 5270, Denver, Colorado 80217. The date of this SAI is August 31, 2000.



Burns/n-14/MSCAMuni_2000


<PAGE>





--------------------------------------------------------------------------------
Oppenheimer California Municipal Fund
--------------------------------------------------------------------------------

Prospectus dated November 22, 1999

                                          Oppenheimer  California Municipal Fund
                                          is a mutual  fund.  It  seeks  current
                                          income   exempt   from   federal   and
                                          California  income  taxes by investing
                                          in   municipal    securities,    while
                                          attempting to preserve capital.

                                               This     Prospectus      contains
                                          important information about the Fund's
                                          objective,  its  investment  policies,
                                          strategies and risks. It also contains
                                          important information about how to buy
                                          and sell  shares of the Fund and other
                                          account  features.  Please  read  this
                                          Prospectus carefully before you invest
                                          and keep
As with all mutual funds, the             it for future reference about your
Securities and Exchange Commission        account.
has not approved or disapproved the
Fund's securities nor has it
determined that this Prospectus is
accurate or complete. It is a
criminal offense to represent
otherwise.








                                                                           67890



<PAGE>


197

Contents
            ABOUT THE FUND
-------------------------------------------------------------------------------

            The Fund's Investment Objective and Strategies

            Main Risks of Investing in the Fund

            The Fund's Past Performance

            Fees and Expenses of the Fund

            About the Fund's Investments

            How the Fund is Managed


            ABOUT YOUR ACCOUNT
--------------------------------------------------------------------------------

            How to Buy Shares
            Class A Shares
            Class B Shares
            Class C Shares

            Special Investor Services
            AccountLink
            PhoneLink
            OppenheimerFunds Web Site

            How to Sell Shares
            By Mail
            By Telephone
            By Checkwriting

            How to Exchange Shares

            Shareholder Account Rules and Policies

            Dividends and Taxes

            Financial Highlights


<PAGE>


ABOUT THE FUND

                            The Fund's Investment Objective and Strategies

WHAT IS THE  FUND'S  INVESTMENT  OBJECTIVE?  The  Fund  seeks as high a level of
current  interest  income  exempt from federal and  California  income taxes for
individual investors as is consistent with preservation of capital.

WHAT DOES THE FUND INVEST IN? The Fund invests  mainly in  California  municipal
securities  that pay  interest  exempt from  federal and  California  individual
income  taxes.  These  primarily  include  municipal  bonds (which are long-term
obligations),   municipal  notes  (short-term  obligations),  and  interests  in
municipal  leases.  Most of the  securities  the Fund buys  must be  "investment
grade" (the four highest  rating  categories of national  rating  organizations,
such as Moody's).

      The Fund does not limit its  investments  to  securities  of a  particular
maturity range, and may hold both short- and long-term  securities.  However, it
currently  focuses  on  longer-term  securities  to seek  higher  yields.  These
investments are more fully explained in "About the Fund's Investments," below.

How Does  The  Portfolio  Manager  Decide  What  Securities  To Buy Or Sell?  In
selecting  securities  for the  Fund,  the  portfolio  manager  looks  primarily
throughout  California for municipal securities using a variety of factors which
may change over time and may vary in particular  cases.  The  portfolio  manager
currently looks for:
o     Securities that provide high current income
o              A wide range of securities of different issuers within the state,
               including different agencies and municipalities, to spread risk
o     Securities having favorable credit characteristics
o     Special situations that provide opportunities for value

WHO IS THE FUND DESIGNED FOR? The Fund is designed for individual  investors who
are seeking  income exempt from federal and  California  income taxes.  The Fund
does  not seek  capital  gains or  growth.  Because  it  invests  in  tax-exempt
securities,  the Fund is not  appropriate  for  retirement  plan accounts or for
investors seeking capital growth. The Fund is not a complete investment program.

Main Risks of Investing in the Fund

      All  investments  have risks to some degree.  The Fund's  investments  are
subject to changes in their  value from a number of  factors,  described  below.
There is also the risk that poor  security  selection  by the Fund's  investment
Manager,  OppenheimerFunds,  Inc.,  will cause the Fund to under  perform  other
funds having a similar objective.

      These risks  collectively form the risk profile of the Fund and can affect
the value of the Fund's investments,  its investment performance, and the prices
of its  shares.  These  risks mean that you can lose money by  investing  in the
Fund. When you redeem your shares,  they may be worth more or less than what you
paid for them. There is no assurance that the Fund will achieve its objective.

HOW RISKY IS THE FUND OVERALL?  The value of the Fund's  investments will change
over time due to a number of  factors.  They  include  changes in  general  bond
market  movements,  the change in value of particular  bonds because of an event
affecting the issuer,  or changes in interest  rates that can affect bond prices
overall. The Fund focuses its investments in California municipal securities and
is  non-diversified.  It will therefore be vulnerable to the effects of economic
changes that affect California  governmental  issuers.  These changes can affect
the  value  of  the  Fund's  investments  and  its  prices  per  share.  In  the
OppenheimerFunds  spectrum,  the Fund is more  conservative  than some  types of
taxable  bond funds,  such as high yield bond funds,  but has greater  risk than
money market funds.

      CREDIT RISK.  Municipal securities are subject to credit risk. Credit risk
is the risk that the issuer of a municipal  security might not make interest and
principal  payments on the  security as they become due. If the issuer  fails to
pay interest,  the Fund's income may be reduced and if the issuer fails to repay
principal,  the value of that  security and of the Fund's shares may be reduced.
Because the Fund can invest as much as 25% of its assets in municipal securities
below  investment  grade to seek  higher  income,  the Fund's  credit  risks are
greater than those of funds that buy only investment-grade bonds. A downgrade in
an  issuer's  credit  rating or other  adverse  news about an issue can reduce a
security's market value.

INTEREST RATE RISKS.  Municipal  securities are debt securities that are subject
to changes in value when prevailing  interest rates change.  When interest rates
fall, the values of already issued  municipal  securities  generally  rise. When
interest rates rise, the values of already issued municipal securities generally
fall, and the bonds may sell at a discount from their face amount. The magnitude
of these price  changes is generally  greater for bonds with longer  maturities.
The Fund  currently  focuses on longer term  securities  to seek higher  income.
Therefore, its share prices may fluctuate more when interest rates change.

RISKS OF  NON-DIVERSIFICATION.  The Fund is  "non-diversified."  That means that
compared to funds that are  diversified,  it can invest a greater portion of its
assets in the  securities  of one issuer,  such as bonds  issued by the State of
California.  Having a higher percentage of its assets invested in the securities
of fewer issuers,  particularly  obligations of government issuers of one state,
could result in greater fluctuations of the Fund's share prices due to economic,
regulatory or political problems in California.

RISKS IN USING  DERIVATIVE  INVESTMENTS.  The Fund can use  derivatives  to seek
increased  returns or to try to hedge  investment  risks.  In general  terms,  a
derivative  investment is an investment  contract  whose value depends on (or is
derived from) the value of an underlying asset, interest rate or index. Options,
futures,  "inverse  floaters"  and  variable  rate  obligations  are examples of
derivatives.

      If the issuer of the  derivative  investment  does not pay the amount due,
the Fund can lose money on its  investment.  Also,  the  underlying  security or
investment on which the derivative is based, and the derivative  itself, may not
perform the way the Manager  expected it to perform.  If that happens,  the Fund
will get less income than expected or its share price could  decline.  To try to
preserve  capital,  the Fund has  limits on the  amount of  particular  types of
derivatives it can hold.

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


The Fund's Past Performance

The bar chart and table below show one measure of the risks of  investing in the
Fund, by showing changes in the Fund's performance (for its Class A shares) from
year to year for the past ten calendar  years and by showing the average  annual
total  returns of the Fund's  shares and  comparing  the  returns of its Class A
shares to the returns of a market index. The Fund's past investment  performance
does not necessarily indicate how the Fund will perform in the future.

[See Bar Chart in Appendix to the Prospectus]

For  the  period  from  1/1/99  through  9/30/99,  the  cumulative  return  (not
annualized) for Class A shares was -3.65%. Sales charges are not included in the
calculations  of return in this bar chart,  and if those charges were  included,
the returns would be less than those shown.
During the  10-year  period  shown in the bar chart,  the  highest  return  (not
annualized) for a calendar  quarter was 8.65% (1Q'95) and the lowest return (not
annualized) for a calendar quarter was -6.00% (1Q'94).

-------------------------------------------------------------------------------
Average Annual Total
Returns for the periods  --------------- Past 5 Years        Past 10 Years
ending December 31,                      (or life of class,  (or life of class,
1998                     Past 1 Year     if less)            if less)
=============================================================
                                         ====================
Class A Shares
(inception 11/3/88)
                              0.88%             4.90%              7.45%*
Lehman Brothers
Municipal Bond Index          6.48%             6.22%               8.08%
(from 12/31/88)

Class B Shares
(inception 5/1/93)            0.21%            4.78%*               5.55%

Class C Shares
(inception 11/1/95)           4.22%            6.57%*                N/A

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

The Fund's average annual total returns include the applicable sales charge: for
Class A, the current  maximum  initial  sales charge of 4.75%;  for Class B, the
applicable  contingent  deferred sales charges of 5% (1-year) and1% (5 years and
life of class);  for Class C, the 1%  contingent  deferred  sales charge for the
1-year period.

The returns  measure the  performance of a hypothetical  account and assume that
all dividends and capital gains distributions have been reinvested in additional
shares. The Fund's performance is compared to the Lehman Brothers Municipal Bond
Index, an unmanaged index of a broad range of investment-grade  municipal bonds.
The  index  performance  does not  consider  the  effects  of  capital  gains or
transaction costs, and the Fund's investment may vary from the securities in the
index.

Fees and Expenses of the Fund

      The Fund pays a variety of expenses directly for management of its assets,
administration,  distribution of its shares and other  services.  Those expenses
are  subtracted  from the Fund's assets to calculate the Fund's net asset values
per  share.   All   shareholders   therefore  pay  those  expenses   indirectly.
Shareholders  pay other  expenses  directly,  such as sales  charges and account
transaction  charges.  The following tables are meant to help you understand the
fees  and  expenses  you may pay if you buy and hold  shares  of the  Fund.  The
numbers below are based on the Fund's expenses during the fiscal year ended July
31, 1999.


Shareholder Fees (charges paid directly from your investment):

                                  Class A Shares  Class B Shares  Class C Shares
                                 -----------------------------------------------
Maximum Sales Charge (Load) on
purchases (as a % of offering          4.75%           None            None
price)
--------------------------------------------------------------------------------
Maximum Deferred Sales Charge
(Load) (as % of the lower of the
original offering price or             None1            5%2            1%3
redemption proceeds)

1. A 1% contingent deferred sales charge may apply to redemptions of investments
of $1 million or more of Class A shares. See "How to Buy Shares" for details.

2. Applies to redemptions in first year after purchase.  The contingent deferred
   sales charge declines to 1% in the sixth year and is eliminated after that.

3.    Applies to shares redeemed within 12 months of purchase.

Annual Fund Operating Expenses (deducted from Fund assets):
(% of average daily net assets)
--------------------------------------------------------------------------
                                       Class A       Class B     Class C
                                       Shares        Shares      Shares
--------------------------------------------------------------------------
--------------------------------------------------------------------------
Management Fees                        0.55%         0.55%       0.55%
--------------------------------------------------------------------------
--------------------------------------------------------------------------
Distribution and/or Service (12b-1) Fees             0.24%       1.00%
1.00%
--------------------------------------------------------------------------
--------------------------------------------------------------------------
Other Expenses                         0.12%         0.12%       0.12%
--------------------------------------------------------------------------
--------------------------------------------------------------------------
Total Annual Operating Expenses        0.91%         1.67%       1.67%
--------------------------------------------------------------------------

Expenses may vary in future years. "Other expenses" include transfer agent fees,
custodial fees, and accounting and legal expenses the Fund pays.

EXAMPLES.  The  following  examples are intended to help you compare the cost of
investing  in the Fund with the cost of investing  in other  mutual  funds.  The
examples assume that you invest $10,000 in a class of shares of the Fund for the
time periods indicated, and reinvest your dividends and distributions.

The first example assumes that you redeem all of your shares at the end of those
periods.  The second  example  assumes you keep your shares.  Both examples also
assume  that  your  investment  has a 5% return  each year and that the  class's
operating  expenses  remain the same.  Your actual  costs may be higher or lower
because expenses will vary over time.  Based on these  assumptions your expenses
would be as follows:

--------------------------------------------------------------------------------
If shares are redeemed:   1 year      3 years      5 years      10 years1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A Shares            $563        $751         $955         $1,541
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B Shares            $670        $826         $1,107       $1,588
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class C Shares            $270        $526         $907         $1,976
--------------------------------------------------------------------------------



--------------------------------------------------------------------------------
If shares are not         1 year      3 years      5 years      10 years1
redeemed:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A Shares            $563        $751         $955         $1,541
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B Shares            $170        $526         $907         $1,588
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class C Shares            $170        $526         $907         $1,976
--------------------------------------------------------------------------------
In the first example,  expenses include the initial sales charge for Class A and
the applicable  Class B or Class C contingent  deferred  sales  charges.  In the
second example,  the Class A expenses include the sales charge,  but Class B and
Class C expenses do not include contingent deferred sales charges.
1. Class B expense for years 7 through 10 are based on Class A  expenses,  since
Class B shares automatically convert to Class A after 6 years.

About the Fund's Investments

THE FUND'S PRINCIPAL INVESTMENT POLICIES. The allocation of the Fund's portfolio
among different types of investments  will vary over time based on the Manager's
evaluation of economic and market trend.  Under normal  market  conditions,  the
Fund:

o     attempts to invest 100% of its assets in municipal securities,

o     as a fundamental policy, invests at least 80% of its assets in municipal
         securities, and

o   invests at least 65% of its total assets in California municipal securities.

   The Manager  tries to reduce  risks by  selecting a wide variety of municipal
investments and by carefully  researching  securities before they are purchased.
However,  changes in the overall  market prices of municipal  securities and the
income  they pay can occur at any time.  The yield and share  prices of the Fund
will change daily based on changes in interest  rates and market  conditions and
in response to other economic  events.  The Statement of Additional  Information
contains  more detailed  information  about the Fund's  investment  policies and
risks.

MUNICIPAL  SECURITIES The Fund buys municipal  bonds and notes,  certificates of
participation in municipal leases and other debt obligations.

      The Fund  mainly  invest in  California  municipal  securities,  which are
municipal securities that are not subject (in the opinion of bond counsel to the
issuer at the time they are issued) to California  individual  income tax. These
debt  obligations  are  issued  by the  State of  California  and its  political
subdivisions (such as cities, towns,  counties,  agencies and authorities).  The
term "California  municipal  securities" may also include debt securities of the
governments of certain possessions,  territories and commonwealths of the United
States if the interest is not subject to California individual income tax.

      The  Fund  can  also  buy  other  municipal  securities,   issued  by  the
governments  of the  District of Columbia  and of other  states as well as their
political  subdivisions,  authorities and agencies, and securities issued by any
commonwealths,  territories  or  possessions  of the  United  States,  or  their
respective agencies,  instrumentalities or authorities,  if the interest paid on
the security is not subject to federal  individual income tax (in the opinion of
bond counsel to the issuer at the time the security is issued).

      Municipal  securities are issued to raise money for a variety of public or
private  purposes,  including  financing state or local  governments,  financing
specific  projects or public  facilities.  The Fund can buy both  long-term  and
short-term  municipal  securities.  Long-term securities have a maturity of more
than one year. The Fund generally  focuses on  longer-term  securities,  to seek
higher income.

      The Fund can buy  municipal  securities  that are  "general  obligations,"
secured by the  issuer's  pledge of its full faith,  credit and taxing power for
the  payment  of  principal  and  interest.  The Fund can also can buy  "revenue
obligations,"  payable only from the revenues derived from a particular facility
or class of facilities,  or a specific excise tax or other revenue source.  Some
revenue  obligations are private  activity bonds that pay interest that may be a
tax preference item for investors subject to alternative minimum tax.

Ratings Of Municipal  Securities The Fund Buys. Most of the municipal securities
the Fund buys are "investment grade" at the time of purchase.  The Fund does not
invest more than 25% of its total  assets in municipal  securities  that are not
"investment  grade" at the time of purchase.  "Investment  grade" securities are
those rated within the four highest  rating  categories  of Moody's,  Standard &
Poor's,  Fitch  or  Duff  &  Phelps  or  another  nationally  recognized  rating
organization,  or (if unrated)  judged by the Manager to be  comparable to rated
investment grade securities. Rating categories are described in the Statement of
Additional  Information.  A reduction in the rating of a security after the Fund
buys it will not  automatically  require  the Fund to dispose of that  security.
However, the Manager will evaluate those securities to determine whether to keep
them in the Fund's portfolio.

      The  Manager  may rely to some  extent on  credit  ratings  by  nationally
recognized rating agencies in evaluating the credit risk of securities  selected
for the Fund's  portfolio.  It may also use its own research and analysis.  Many
factors affect an issuer's ability to make timely payments, and the credit risks
of a particular security may change over time.

Special Credit Risks of Lower-Grade Securities. Lower-grade municipal securities
may be subject to  greater  market  fluctuations  and  greater  risks of loss of
income and principal than higher-grade municipal securities. Securities that are
(or that have  fallen)  below  investment  grade  entail a greater risk that the
issuers may not meet their debt obligations.

Municipal  Lease  Obligations.  Municipal  leases  are used by state  and  local
government authorities to obtain funds to acquire land, equipment or facilities.
The  Fund  can  invest  in  certificates  of  participation   that  represent  a
proportionate  interest in payments made under municipal lease  obligations.  If
the government  stops making payments or transfers its payment  obligations to a
private entity, the obligation could lose value or become taxable.

CAN THE FUND'S  INVESTMENT  OBJECTIVE AND POLICIES  CHANGE?  The Fund's Board of
Trustees  can change  non-fundamental  policies  without  shareholder  approval,
although significant changes will be described in amendments to this Prospectus.
Fundamental policies cannot be changed without the approval of a majority of the
Fund's  outstanding  voting  shares.  The  Fund's  investment   objective  is  a
fundamental policy. An investment policy and technique is not fundamental unless
this Prospectus or the Statement of Additional Information says it is.

OTHER INVESTMENT  STRATEGIES.  To seek its objective,  the Fund can also use the
investment  techniques and strategies described below. The Fund might not always
use all of them.  These  techniques  involve risks although some are designed to
help reduce overall investment or market risks.

Floating Rate/Variable Rate Obligations. Some municipal securities have variable
or floating  interest  rates.  Variable rates are adjustable at stated  periodic
intervals.  Floating rates are automatically  adjusted  according to a specified
market rate for such investments,  such as the percentage of the prime rate of a
bank, or the 91-day U.S. Treasury Bill rate.

      Certain variable rate bonds known as "inverse floaters" pay interest rates
that move in the opposite direction of yields on short-term bonds in response to
market changes.  As interest rates rise,  inverse  floaters produce less current
income, and their market value can become volatile.  Inverse floaters are a type
of  "derivative  security."  Some have a "cap," so that if  interest  rates rise
above the "cap," the security pays additional  interest income.  If rates do not
rise above the "cap," the Fund will have paid an additional amount for a feature
that proves worthless.  The Fund cannot invest more than 20% of its total assets
in inverse floaters.

Other Derivatives.  The Fund can also invest in other derivative securities that
pay interest that depend on the change in value of an underlying asset, interest
rate or index. Examples are interest rate swaps,  municipal bond indices or swap
indices.

When-Issued and Delayed-Delivery  Transactions.  The Fund may purchase municipal
securities on a "when-issued"  basis and may purchase or sell such securities on
a "delayed-delivery"  basis. Between the purchase and settlement,  no payment is
made for the security and no interest  accrues to the buyer from the investment.
There is a risk of loss to the Fund if the value of the security  declines prior
to the settlement date.

Puts and Stand-By  Commitments.  The Fund can acquire "stand-by  commitments" or
"puts" with respect to municipal securities.  The Fund obtains the right to sell
specified  securities at a set price on demand to the issuing  broker-dealer  or
bank. However, this feature may result in a lower interest rate on the security.
The Fund  acquires  stand-by  commitments  or puts  solely to enhance  portfolio
liquidity.

Illiquid and Restricted Securities.  Investments may be illiquid because they do
not have an active trading market,  making it difficult to value them or dispose
of them promptly at an acceptable  price. The Fund will not invest more than 15%
of its net assets in  illiquid  securities.  The  Manager  monitors  holdings of
illiquid  securities  on an  ongoing  basis  to  determine  whether  to sell any
holdings to maintain  adequate  liquidity.  The Fund cannot buy securities  that
have a restriction on resale.

Hedging.  The Fund can buy and sell futures contracts,  put and call options, or
enter into interest rate swap agreements.  These are all referred to as "hedging
instruments."  The  Fund  does  not  use  hedging  instruments  for  speculative
purposes,  and has  limits  on the use of them.  The Fund  does not use  hedging
instruments  to a substantial  degree and is not required to use them in seeking
its goal.

      Hedging  involves  risk.  If the Manager uses a hedging  instrument at the
wrong time or judges market  conditions  incorrectly,  the strategy could reduce
the Fund's return.  The Fund could also  experience  losses if the prices of its
futures and options  positions were not correlated with its other investments or
if it could not close out a  position  because  of an  illiquid  market  for the
future or option.

Temporary  Defensive  Investments.  The Fund can  invest up to 100% of its total
assets in  temporary  defensive  investments  during  periods of unusual  market
conditions.  Generally,  they would be short-term municipal securities but could
be U.S.  Government  securities or highly-rated  corporate debt securities.  The
income from some temporary  defensive  investments  may not be  tax-exempt,  and
therefore  when  making  those  investments  the  Fund  might  not  achieve  its
objective.  The Fund can  also  hold  cash  and  cash  equivalents  pending  the
investment of proceeds  from the sale of Fund shares or portfolio  securities or
to meet anticipated redemptions of Fund shares.

How the Fund is Managed

THE MANAGER. The Fund's investment Manager, OppenheimerFunds,  Inc., selects the
Fund's investments and handles its day-to-day business.  The Manager carries out
its duties, subject to the policies established by the Board of Trustees,  under
an investment  advisory  agreement which states the Manager's  responsibilities.
The  agreement  sets the fees paid by the Fund to the Manager and  describes the
expenses that the Fund is responsible to pay to conduct its business.

      The Manager has operated as an investment  advisor since 1960. The Manager
(including  subsidiaries)  currently manages more than $110 billion of assets as
of  September  30,  1999,  including  other  Oppenheimer  funds with more than 5
million shareholder accounts.  The Manager is located at Two World Trade Center,
34th Floor, New York, New York 10048-0203.

Portfolio  Manager.  The portfolio  manager of the Fund is Christian D. Smith, a
Senior Vice President of the Manager.  He is the person principally  responsible
for the  day-to-day  management  of the Fund's  portfolio  and became the Fund's
portfolio manager on November 1, 1999. Mr. Smith is a Vice President of the Fund
and also serves as an officer and portfolio manager for other Oppenheimer funds.
Prior to joining  OppenheimerFunds  in  September  1999,  he was  Co-Head of the
Municipal Portfolio Management Team of Prudential Global Asset Management, prior
to which he was a portfolio manager for that firm (January 1990-January 1999).

Advisory  Fees.  Under  the  investment  advisory  agreement,  the Fund pays the
Manager an advisory  fee at an annual rate which  declines as the Fund's  assets
grow: 0.60% of the first $200 million of average annual net assets, 0.55% of the
next  $100  million,  0.50% of the next  $200  million,  0.45% of the next  $250
million,  0.40% of the next $250 million, and 0.35% of average annual net assets
over $1 billion.  The Fund's  management fee for its last fiscal year ended July
31, 1999, was 0.55% of average annual net assets for each class of shares.

YEAR 2000 ISSUES.  Because many  computer  software  systems in use today cannot
distinguish  the year 2000 from the year 1900,  the  markets for  securities  in
which the Fund  invests  could be  detrimentally  affected by computer  failures
beginning  January 1, 2000.  Failure of  computer  systems  used for  securities
trading could result in settlement and liquidity problems for the Fund and other
investors.  That  failure  could have a negative  impact on handling  securities
trades,  pricing and accounting  services.  Data processing errors by government
issuers of securities  could result in economic  uncertainties,  and issuers may
incur  substantial  costs in  attempting  to prevent or fix such errors,  all of
which could have a negative effect on the Fund's investments and returns.

      The Manager,  the  Distributor and the Transfer Agent have been working on
necessary  changes  to their  computer  systems  to deal  with the year 2000 and
expect that their systems will be adapted in time for that event, although there
cannot be assurance of success.  Additionally,  the services they provide depend
on the interaction of their computer systems with those of brokers,  information
services, the Fund's custodian bank and other parties. Therefore, any failure of
the computer systems of those parties to deal with the year 2000 may also have a
negative  effect on the services  they  provide to the Fund.  The extent of that
risk cannot be ascertained at this time.

--------------------------------------------------------------------------------
ABOUT YOUR ACCOUNT
--------------------------------------------------------------------------------

How to Buy Shares

HOW DO YOU BUY SHARES? You can buy shares several ways, as described below.  The
Fund's Distributor, OppenheimerFunds Distributor, Inc., may appoint certain
servicing agents to accept purchase (and redemption) orders. The Distributor, in
its sole discretion, may reject any purchase order for the Fund's shares.

Buying  Shares  Through  Your  Dealer.  You can buy shares  through  any dealer,
broker,   or  financial   institution  that  has  a  sales  agreement  with  the
Distributor.  Your  dealer  will place your order with the  Distributor  on your
behalf.

Buying Shares Through the Distributor.  Complete an OppenheimerFunds New Account
Application and return it with a check payable to "OppenheimerFunds Distributor,
Inc." Mail it to P.O.  Box 5270,  Denver,  Colorado  80217.  If you don't list a
dealer on the application,  the Distributor will act as your agent in buying the
shares.  However, we recommend that you discuss your investment with a financial
advisor before your make a purchase to be sure that the Fund is appropriate  for
you.

o  Paying by Federal Funds Wire. Shares purchased through the Distributor may be
   paid for by Federal  Funds wire.  The minimum  investment  is $2,500.  Before
   sending a wire, call the  Distributor's  Wire Department at 1-800-525-7048 to
   notify the Distributor of the wire, and to receive further instructions.

o  Buying Shares Through OppenheimerFunds AccountLink. With AccountLink, you pay
   for shares by electronic  funds transfers from your bank account.  Shares are
   purchased  for your  account  by a transfer  of money from your bank  account
   through the Automated  Clearing House (ACH)  transfer to buy the shares.  You
   can provide those  instructions  automatically,  under an Asset Builder Plan,
   described  below,  or  by  telephone   instructions  using   OppenheimerFunds
   PhoneLink,  also described below.  Please refer to  "AccountLink,"  below for
   more details.

o  Buying Shares  Through Asset Builder  Plans.  You may purchase  shares of the
   Fund (and up to four other Oppenheimer  funds)  automatically each month from
   your account at a bank or other financial  institution under an Asset Builder
   Plan with AccountLink.  Details are in the Asset Builder  Application and the
   Statement of Additional Information.

HOW MUCH MUST YOU INVEST?  You can open a Fund  account  with a minimum  initial
investment of $1,000.  You can make  additional  investments at any time with as
little as $25. There are reduced minimum  investments  under special  investment
plans.

o  With Asset Builder Plans,  Automatic  Exchange  Plans and military  allotment
   plans, you can make initial and subsequent  investments for as little as $25.
   You can make  additional  purchases  of at  least  $25 by  telephone  through
   AccountLink.

o  The minimum  investment  requirement does not apply to reinvesting  dividends
   from the  Fund or other  Oppenheimer  funds  (a list of them  appears  in the
   Statement of Additional  Information,  or you can ask your dealer or call the
   Transfer Agent),  or reinvesting  distributions  from unit investment  trusts
   that have made arrangements with the Distributor.

AT WHAT PRICE ARE SHARES SOLD? Shares are sold at their offering price, which is
the net asset value per share plus any initial  sales charge that  applies.  The
offering price that applies to a purchase order is based on the next calculation
of the net asset value per share that is made after the Distributor receives the
purchase order at its offices in Denver,  Colorado, or after any agent appointed
by the Distributor receives the order and sends it to the Distributor.

o  Net Asset  Value.  The Fund  calculates  the net asset value of each class of
   shares  as of the  close  of The New  York  Stock  Exchange,  on each day the
   Exchange is open for trading  (referred to in this  Prospectus  as a "regular
   business day"). The Exchange normally closes at 4:00 P.M., New York time, but
   may close earlier on some days.  All  references  to time in this  Prospectus
   mean "New York time".

      The net asset value per share is  determined  by dividing the value of the
Fund's net assets  attributable to a class by the number of shares of that class
that are outstanding. To determine net asset value, the Fund's Board of Trustees
has established  procedures to value the Fund's securities,  in general based on
market value.  The Board has adopted  special  procedures  for valuing  illiquid
securities and obligations for which market values cannot be readily obtained.

The Offering  Price. To receive the offering price for a particular day, in most
cases the  Distributor  or its  designated  agent must receive your order by the
time of day The New York  Stock  Exchange  closes  that  day.  If your  order is
received on a day when the Exchange is closed or after it has closed,  the order
will  receive the next  offering  price that is  determined  after your order is
received.

Buying through a dealer.  If you buy shares  through a dealer,  your dealer must
receive the order by the close of The New York Stock Exchange and transmit it to
the  Distributor  so that it is  received  before  the  Distributor's  close  of
business on a regular  business day  (normally  5:00 P.M.) to receive that day's
offering price.  Otherwise,  the order will receive the next offering price that
is determined.

--------------------------------------------------------------------------------
WHAT  CLASSES OF SHARES DOES THE FUND OFFER?  The Fund  offers  investors  three
different  classes  of  shares.   The  different  classes  of  shares  represent
investments in the same portfolio of securities,  but the classes are subject to
different  expenses and will likely have  different  share prices.  When you buy
shares,  be sure to specify  Class A,  Class B or Class C shares.  If you do not
choose a class, your investment will be made in Class A shares.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class A Shares.  If you buy Class A shares,  you pay an initial sales charge (on
investments  up to $1  million).  The  amount  of that  sales  charge  will vary
depending  on the amount you invest.  The sales  charge rates are listed in "How
Can You Buy Class A Shares?" below.

Class B Shares.  If you buy Class B shares,  you pay no sales charge at the time
of purchase,  but you will pay an annual  asset-based  sales charge. If you sell
your shares within six years of buying them,  you will normally pay a contingent
deferred  sales charge.  That sales charge varies  depending on how long you own
your shares, as described in "How Can You Buy Class B Shares?" below.
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Class C Shares.  If you buy Class C shares,  you pay no sales charge at the time
of purchase,  but you will pay an annual  asset-based  sales charge. If you sell
your shares within 12 months of buying them,  you will normally pay a contingent
deferred  sales  charge of 1%, as described in "How Can You Buy Class C Shares?"
below.

WHICH  CLASS OF SHARES  SHOULD YOU  CHOOSE?  Once you decide that the Fund is an
appropriate investment for you, the decision as to which class of shares is best
suited to your needs depends on a number of factors that you should discuss with
your financial advisor. Some factors to consider are how much you plan to invest
and how long you plan to hold your  investment.  If your  goals  and  objectives
change  over  time  and you  plan to  purchase  additional  shares,  you  should
re-evaluate those factors to see if you should consider another class of shares.
The Fund's operating costs that apply to a class of shares and the effect of the
different  types of sales charges on your  investment  will vary your investment
results over time.


      The  discussion  below  is  not  intended  to be  investment  advice  or a
recommendation,  because each investor's financial considerations are different.
You should  review these factors with your  financial  advisor.  The  discussion
below  assumes  that  you will  purchase  only one  class  of  shares  and not a
combination of shares of different classes.

How Long Do You Expect to Hold Your  Investment?  While future  financial  needs
cannot be  predicted  with  certainty,  knowing how long you expect to hold your
investment will assist you in selecting the appropriate class of shares. Because
of the effect of class-based expenses,  your choice will also depend on how much
you plan to invest. For example,  the reduced sales charges available for larger
purchases  of Class A shares  may,  over  time,  offset  the effect of paying an
initial  sales  charge on your  investment,  compared to the effect over time of
higher class-based expenses on shares of Class B or Class C.

o     Investing for the Shorter Term.  While the Fund is meant to be a long-term
   investment, if you
have a relatively  short-term investment horizon (that is, you plan to hold your
shares for not more than six years),  you should  probably  consider  purchasing
Class A or Class C shares  rather  than  Class B shares.  That is because of the
effect of the Class B contingent  deferred sales charge if you redeem within six
years,  as well as the  effect of the Class B  asset-based  sales  charge on the
investment  return for that class in the short term. Class C shares might be the
appropriate choice  (especially for investments of less than $100,000),  because
there is no initial sales charge on Class C shares, and the contingent  deferred
sales charge does not apply to amounts you sell after holding them one year.

      However,  if you plan to invest more than  $100,000 for the shorter  term,
then as your investment horizon increases toward six years, Class C shares might
not be as advantageous as Class A shares. That is because the annual asset-based
sales  charge on Class C shares will have a greater  impact on your account over
the longer term than the reduced  front-end  sales charge  available  for larger
purchases of Class A shares.

      And for  investors  who invest $1 million or more,  in most cases  Class A
shares will be the most  advantageous  choice,  no matter how long you intend to
hold your shares.  For that reason,  the  Distributor  normally  will not accept
purchase  orders of  $500,000 or more of Class B shares or $1 million or more of
Class C shares from a single investor.

o    Investing for the Longer Term.  If you are investing less than $100,000 for
   the longer term,
for example for  retirement,  and do not expect to need access to your money for
seven years or more, Class B shares may be appropriate.

      Of course,  these  examples are based on  approximations  of the effect of
current sales charges and expenses projected over time, and do not detail all of
the  considerations  in  selecting a class of shares.  You should  analyze  your
options carefully with your financial advisor before making that choice.

Are There  Differences  In Account  Features  That Matter To You?  Some  account
features  (such  as  checkwriting)  may not be  available  to Class B or Class C
shareholders.  Other  features (such as Automatic  Withdrawal  Plans) may not be
advisable  (because of the effect of the  contingent  deferred sales charge) for
Class B or Class C shareholders.  Therefore, you should carefully review how you
plan to use your  investment  account  before  deciding which class of shares to
buy.  Additionally,  the dividends  payable to Class B and Class C  shareholders
will be reduced by the  additional  expenses borne by those classes that are not
borne by Class A  shares,  such as the  Class B and  Class C  asset-based  sales
charge  described  below and in the Statement of Additional  Information.  Share
certificates and checkwriting privileges are not available for Class B and Class
C shares, and if you are considering using your shares as collateral for a loan,
that may be a factor to consider.

How Does It Affect Payments to My Broker? A salesperson,  such as a broker,  may
receive different  compensation for selling one class of shares than for selling
another  class.  It is important to remember that Class B and Class C contingent
deferred  sales charges and  asset-based  sales charges have the same purpose as
the  front-end  sales  charge  on sales of Class A  shares:  to  compensate  the
Distributor  for  commissions  and  expenses  it pays to dealers  and  financial
institutions for selling shares. The Distributor may pay additional compensation
from its own resources to  securities  dealers or financial  institutions  based
upon  the  value  of  shares  of the  Fund  owned  by the  dealer  or  financial
institution for its own account or for its customers.

SPECIAL SALES CHARGE  ARRANGEMENTS  AND WAIVERS.  Appendix C to the Statement of
Additional  Information  details the  conditions for the waiver of sales charges
that apply in certain  cases,  and the special  sales charge rates that apply to
purchases of shares of the Fund by certain groups, or under specified retirement
plan arrangements or in other special types of transactions. To receive a waiver
or special sales charge rate, you must advise the  Distributor  when  purchasing
shares or the Transfer Agent when redeeming  shares that the special  conditions
apply.

HOW CAN YOU BUY CLASS A SHARES? Class A shares are sold at their offering price,
which is normally net asset value plus an initial sales charge. However, in some
cases,  described  below,  purchases are not subject to an initial sales charge,
and the  offering  price will be the net asset value.  In other  cases,  reduced
sales  charges may be  available,  as  described  below or in the  Statement  of
Additional Information.  Out of the amount you invest, the Fund receives the net
asset value to invest for your account.

      The sales  charge  varies  depending  on the  amount of your  purchase.  A
portion of the sales charge may be retained by the  Distributor  or allocated to
your dealer as  commission.  The  Distributor  reserves the right to reallow the
entire  commission to dealers.  The current  sales charge rates and  commissions
paid to dealers and brokers are as follows:
--------------------------------------------------------------------------------
                          Front-End Sales                Front-End Sales
Commission As a
                          Charge As a                       Charge As
a            Percentage of
                          Percentage of        Percentage of Net   Offering
Amount of Purchase        Offering Price       Amount Invested Price
--------------------------------------------------------------------------------

Less than $50,000           4.75%                 4.98%        4.00%
--------------------------------------------------------------------------------

$50,000 or more but         4.50%                 4.71%        4.00%
less than $100,000
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

$100,000 or more but        3.50%                 3.63%        3.00%
less than $250,000
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

$250,000 or more but        2.50%                 2.56%        2.25%
less than $500,000
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

$500,000 or more but        2.00%                 2.04%        1.80%
less than $1 million
--------------------------------------------------------------------------------

Class A Contingent  Deferred  Sales Charge.  There is no initial sales charge on
purchases  of  Class  A  shares  of any one or  more  of the  Oppenheimer  funds
aggregating  $1  million  or  more.  The  Distributor  pays  dealers  of  record
commissions in an amount equal to 0.50% of purchases of $1 million or more other
than by retirement accounts. That commission will be paid only on purchases that
were not previously subject to a front-end sales charge and dealer commission.

      If you  redeem  any of those  shares  within  18  months of the end of the
calendar month of their purchase, a contingent deferred sales charge (called the
"Class A contingent  deferred sales charge") may be deducted from the redemption
proceeds.  That  sales  charge  will be equal to 1.0% of the  lesser  of (1) the
aggregate  net asset  value of the  redeemed  shares  at the time of  redemption
(excluding  shares  purchased  by  reinvestment  of  dividends  or capital  gain
distributions)  or (2) the  original  net asset  value of the  redeemed  shares.
However,  the Class A  contingent  deferred  sales  charge  will not  exceed the
aggregate  amount of the commissions the Distributor  paid to your dealer on all
purchases of Class A shares of all Oppenheimer  funds you made that were subject
to the Class A contingent deferred sales charge.

      In determining  whether a contingent deferred sales charge is payable when
shares are  redeemed,  the Fund will first redeem shares that are not subject to
the sales charge,  including  shares  purchased by reinvestment of dividends and
capital gains.  Then the Fund will redeem other shares in the order in which you
purchased them.

      The Class A contingent  deferred  sales charge is not charged on exchanges
of shares under the Fund's Exchange Privilege (described below). However, if the
shares acquired by exchange are redeemed within 18 calendar months of the end of
the calendar month in which the exchanged shares were originally purchased, then
the sales charge will apply.

HOW CAN YOU REDUCE SALES  CHARGES IN BUYING CLASS A SHARES?  You may be eligible
to buy Class A shares at reduced  sales charge rates under the Fund's  "Right of
Accumulation" or a Letter of Intent,  as described in "Reduced Sales Charges" in
the  Statement of  Additional  Information.  The Class A initial and  contingent
deferred  sales  charges  are not  imposed  in the  circumstances  described  in
"Reduced Sales Charges" in the Statement of Additional Information.

HOW CAN YOU BUY CLASS B SHARES?  Class B shares are sold at net asset  value per
share without an initial sales charge.  However,  if Class B shares are redeemed
within 6 years of their  purchase,  a contingent  deferred  sales charge will be
deducted from the  redemption  proceeds.  The Class B contingent  deferred sales
charge is paid to  compensate  the  Distributor  for its  expenses of  providing
distribution-related services to the Fund in connection with the sale of Class B
shares.

      The  contingent  deferred  sales charge will be based on the lesser of the
net asset value of the redeemed shares at the time of redemption or the original
net asset value.  The contingent  deferred sales charge is not imposed on: o the
amount of your account value represented by an increase in net asset
            value over the initial purchase price or
o     shares purchased by the reinvestment of dividends or capital gains
            distributions.
o    shares redeemed in the special circumstances described in Appendix C to the
            Statement of Additional Information.

      To determine whether the contingent deferred sales charge applies to a
redemption, the Fund redeems shares in the following order:
1. shares acquired by reinvestment of dividends and capital gains distributions,
2. shares held for over 6 years, and
3. shares held the longest during the 6-year period.

      The amount of the  contingent  deferred  sales  charge  will depend on the
number  of years  since you  invested  and the  dollar  amount  being  redeemed,
according to the following schedule:

-------------------------------------------------------------------------------
Years Since Beginning of         Contingent Deferred Sales Charge
Month in which Purchase          On Redemptions in That Year
Order Was Accepted               (As % of Amount Subject to Charge)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
0-1                              5.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
1-2                              4.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
2-3                              3.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
3-4                              3.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
4-5                              2.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
5-6                              1.0%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
6 and following                  None
--------------------------------------------------------------------------------

In the table, a "year" is a 12-month period.  In applying the sales charge,  all
purchases are considered to have been made on the first regular  business day of
the month in which the purchase was made.

Automatic Conversion of Class B Shares. Class B shares automatically  convert to
Class A shares 72 months  after  you  purchase  them.  This  conversion  feature
relieves Class B shareholders  of the  asset-based  sales charge that applies to
Class B shares under the Class B Distribution and Service Plan, described below.
The conversion is based on the relative net asset value of the two classes,  and
no sales  load or other  charge is  imposed.  When any  Class B shares  you hold
convert,  any  other  Class B shares  that  were  acquired  by  reinvesting  any
dividends and distributions on the converted shares will also convert to Class A
shares. The conversion feature is subject to the continued availability of a tax
ruling described in the Statement of Additional Information.

HOW CAN YOU BUY CLASS C SHARES?  Class C shares are sold at net asset  value per
share without an initial sales charge.  However,  if Class C shares are redeemed
within 12 months of their purchase,  a contingent  deferred sales charge of 1.0%
will be deducted from the redemption  proceeds.  The Class C contingent deferred
sales charge is paid to compensate the Distributor for its expenses of providing
distribution-related services to the Fund in connection with the sale of Class C
shares.

      The  contingent  deferred  sales charge will be based on the lesser of the
net asset value of the redeemed shares at the time of redemption or the original
net asset value.  The contingent  deferred sales charge is not imposed on: o the
amount of your account value represented by the increase in net asset
         value over the initial purchase price
o  shares purchased by the reinvestment of dividends or capital gains
   distributions, or
o  shares redeemed in the special circumstances described in the Appendix to the
   Statement of Additional Information.

      To determine whether the contingent deferred sales charge applies to a
redemption, the Fund redeems shares in the following order:
1.shares acquired by reinvestment of dividends and capital gains distributions,
2.shares held for over 12 months, and
3.shares held the longest during the 12-month period.

                            DISTRIBUTION AND SERVICE (12B-1) PLANS

Service Plan for Class A Shares. The Fund has adopted a Service Plan for Class A
shares.  It reimburses the  Distributor  for a portion of its costs incurred for
services  provided to accounts that hold Class A shares.  Reimbursement  is made
quarterly  at an annual rate of up to 0.25% of the average  annual net assets of
Class A shares of the Fund. The Distributor  currently uses all of those fees to
compensate dealers,  brokers,  banks and other financial  institutions quarterly
for providing  personal  service and  maintenance of accounts of their customers
that hold Class A shares.

Distribution  and  Service  Plans for  Class B and Class C Shares.  The Fund has
adopted  Distribution  and  Service  Plans  for  Class B and  Class C shares  to
compensate the Distributor  for its services and costs in  distributing  Class B
and Class C shares and servicing  accounts.  Under the plans,  the Fund pays the
Distributor  an  annual  asset-based  sales  charge of 0.75% per year on Class B
shares and on Class C shares.  The  Distributor  also  receives a service fee of
0.25% per year under each plan.

      The asset-based sales charge and service fees increase Class B and Class C
expenses  by up to 1.00% of the net  assets  per year of the  respective  class.
Because these fees are paid out of the Fund's assets on an ongoing  basis,  over
time these fees will increase the cost of your  investment and may cost you more
than other types of sales charges.

      The Distributor uses the service fees to compensate  dealers for providing
personal  services  for  accounts  that  hold  Class B or  Class C  shares.  The
Distributor pays the 0.25% service fees to dealers in advance for the first year
after the shares were sold by the dealer.  After the shares have been held for a
year, the Distributor pays the service fees to dealers on a quarterly basis.

      The Distributor currently pays a sales commission of 3.75% of the purchase
price of Class B shares to dealers  from its own  resources at the time of sale.
Including  the  advance  of the  service  fee,  the  total  amount  paid  by the
Distributor  to the  dealer at the time of sales of Class B shares is  therefore
4.00% of the purchase  price.  The  Distributor  retains the Class B asset-based
sales charge.

      The Distributor  currently pays sales commissions of 0.75% of the purchase
price of Class C shares to dealers  from its own  resources at the time of sale.
Including  the  advance  of the  service  fee,  the  total  amount  paid  by the
Distributor  to the  dealer at the time of sale of Class C shares  is  therefore
1.00% of the purchase price. The Distributor  plans to pay the asset-based sales
charge as an ongoing  commission  to the dealer on Class C shares that have been
outstanding for a year or more.

Special Investor Services

ACCOUNT LINK. You can use our AccountLink feature to link your Fund account with
an  account  at a U.S.  bank  or  other  financial  institution.  It  must be an
Automated Clearing House (ACH) member. AccountLink lets you:
o    transmit funds  electronically to purchase shares by telephone (through a
     service  representative  or by  PhoneLink)  or  automatically  under  Asset
     Builder Plans, or
o    have the Transfer Agent send redemption proceeds or to transmit dividends
     and distributions  directly to your bank account.  Please call the Transfer
     Agent for more information.

      You can  purchase  shares by  telephone  only after your  account has been
established.  To purchase  shares in amounts up to $250,000  through a telephone
representative,  call the Distributor at  1-800-852-8457.  The purchase  payment
will be debited from your bank account.

      AccountLink  privileges  should be requested on your  Application  or your
dealer's settlement  instructions if you buy your shares through a dealer. After
your account is established,  you can request AccountLink  privileges by sending
signature-guaranteed  instructions to the Transfer Agent. AccountLink privileges
will apply to each  shareholder  listed in the  registration  on your account as
well as to your dealer  representative  of record  unless and until the Transfer
Agent receives written  instructions  terminating or changing those  privileges.
After you establish  AccountLink  for your  account,  any change of bank account
information  must be made by  signature-guaranteed  instructions to the Transfer
Agent signed by all shareholders who own the account.

PHONELINK.  PhoneLink is the  OppenheimerFunds  automated  telephone system that
enables shareholders to perform a number of account  transactions  automatically
using a touch-tone  phone.  PhoneLink  may be used on  already-established  Fund
accounts after you obtain a Personal Identification Number (PIN), by calling the
special PhoneLink number, 1-800-533-3310.

Purchasing  Shares.  You may purchase shares in amounts up to $100,000 by phone,
by calling  1-800-533-3310.  You must have established AccountLink privileges to
link your bank account with the Fund to pay for these purchases.

Exchanging  Shares.  With the  OppenheimerFunds  Exchange  Privilege,  described
below, you can exchange shares  automatically by phone from your Fund account to
another  OppenheimerFunds  account you have already  established  by calling the
special PhoneLink number.

Selling Shares. You can redeem shares by telephone  automatically by calling the
PhoneLink  number  and  the  Fund  will  send  the  proceeds  directly  to  your
AccountLink  bank  account.  Please  refer to "How to Sell  Shares,"  below  for
details.

CAN YOU SUBMIT  TRANSACTION  REQUESTS BY FAX? You may send  requests for certain
types of account transactions to the Transfer Agent by fax (telecopier).  Please
call 1-800-525-7048 for information about which transactions may be handled this
way.  Transaction  requests  submitted  by fax are subject to the same rules and
restrictions as written and telephone requests described in this Prospectus.

OPPENHEIMERFUNDS  INTERNET WEB SITE. You can obtain  information about the Fund,
as well as your account balance, on the  OppenheimerFunds  Internet web site, at
http://www.oppenheimerfunds.com.   Additionally,   shareholders  listed  in  the
account  registration  (and the dealer of record)  may request  certain  account
transactions  through a special  section of that web site.  To  perform  account
transactions,  you must first obtain a personal  identification  number (PIN) by
calling  the  Transfer  Agent  at  1-800-533-3310.  If you do not  want  to have
Internet  account  transaction  capability  for your  account,  please  call the
Transfer Agent at 1-800-525-7048.

AUTOMATIC  WITHDRAWAL AND EXCHANGE PLANS. The Fund has several plans that enable
you to sell shares  automatically  or exchange them to another  Oppenheimer fund
account on a regular  basis.  Please  call the  Transfer  Agent or  consult  the
Statement of Additional Information for details.

REINVESTMENT  PRIVILEGE.  If you  redeem  some or all of your Class A or Class B
shares  of the  Fund,  you have up to 6 months  to  reinvest  all or part of the
redemption  proceeds  in Class A shares of the Fund or other  Oppenheimer  funds
without  paying a sales charge.  This  privilege  applies only to Class A shares
that you purchased  subject to an initial sales charge and to Class A or Class B
shares on which you paid a  contingent  deferred  sales charge when you redeemed
them.  This privilege does not apply to Class C shares.  You must be sure to ask
the Distributor for this privilege when you send your payment.

How to Sell Shares

      You can sell (redeem)  some or all of your shares on any regular  business
day. Your shares will be sold at the next net asset value  calculated after your
order is  received  in proper  form  (which  means that it must  comply with the
procedures described below) and is accepted by the Transfer Agent. The Fund lets
you sell your  shares by  writing a  letter,  by using the  Fund's  checkwriting
privilege or by  telephone.  You can also set up Automatic  Withdrawal  Plans to
redeem  shares  on a regular  basis.  If you have  questions  about any of these
procedures,  and especially if you are redeeming shares in a special  situation,
such as due to the death of the owner,  please call the Transfer Agent first, at
1-800-525-7048, for assistance.

Certain Requests Require a Signature Guarantee. To protect you and the Fund from
fraud, the following  redemption  requests must be in writing and must include a
signature  guarantee (although there may be other situations that also require a
signature guarantee):
      |_| You wish to redeem  more  than  $100,000  and  receive a check

     |_| The redemption check is not payable to all  shareholders  listed on the
     account statement

     |_| The  redemption  check is not sent to the  address  of  record  on your
     account statement

     |_| Shares are being  transferred to a Fund account with a different  owner
     or name

     |_| Shares are being  redeemed by someone (such as an Executor)  other than
     the owners

Where Can You Have Your Signature  Guaranteed?  The Transfer Agent will accept a
guarantee of your signature by a number of financial institutions,  including: a
U.S. bank, trust company,  credit union or savings association,  or by a foreign
bank  that has a U.S.  correspondent  bank,  or by a U.S.  registered  dealer or
broker in securities,  municipal  securities or government  securities,  or by a
U.S. national  securities  exchange,  a registered  securities  association or a
clearing agency.  If you are signing on behalf of a corporation,  partnership or
other  business  or as a  fiduciary,  you must also  include  your  title in the
signature.

HOW DO YOU SELL SHARES BY MAIL? Write a "letter of instructions"  that includes:
o Your name o The Fund's  name o Your Fund  account  number  (from your  account
statement) o The dollar  amount or number of shares to be redeemed o Any special
payment  instructions o Any share  certificates for the shares you are selling o
The signatures of all registered owners exactly as the account is registered,
      and
o     Any special  documents  requested by the Transfer  Agent to assure  proper
      authorization of the person asking to sell the shares.

--------------------------------------------------------------------------------
Use the following address for requests by mail:
--------------------------------------------------------------------------------
OppenheimerFunds Services
--------------------------------------------------------------------------------
P.O. Box 5270
-------------------------------------------------------------------------------
Denver, Colorado 80217-5270

--------------------------------------------------------------------------------
Send courier or express mail requests to:
--------------------------------------------------------------------------------
OppenheimerFunds Services
10200 E. Girard Avenue, Building D
Denver, Colorado 80231

HOW DO YOU SELL  SHARES BY  TELEPHONE?  You and your  dealer  representative  of
record may also sell your shares by telephone.  To receive the redemption  price
calculated on a particular  regular  business day, your call must be received by
the Transfer  Agent by the close of The New York Stock  Exchange that day, which
is  normally  4:00 P.M.,  but may be  earlier  on some days.  You may not redeem
shares held under a share certificate by telephone.
o     To redeem shares through a service representative, call 1-800-852-8457
o     To redeem shares automatically on PhoneLink, call 1-800-533-3310

      Whichever  method you use, you may have a check sent to the address on the
account statement, or, if you have linked your Fund account to your bank account
on AccountLink, you may have the proceeds sent to that bank account.

                            ARE THERE LIMITS ON AMOUNTS REDEEMED BY TELEPHONE?

Telephone Redemptions Paid by Check. Up to $100,000 may be redeemed by telephone
in any 7-day  period.  The check  must be payable to all owners of record of the
shares and must be sent to the address on the account statement. This service is
not available within 30 days of changing the address on an account.

Telephone  Redemptions  Through  AccountLink.  There  are no  dollar  limits  on
telephone  redemption  proceeds  sent  to a bank  account  designated  when  you
establish  AccountLink.  Normally  the ACH transfer to your bank is initiated on
the  business  day after the  redemption.  You do not receive  dividends  on the
proceeds of the shares you redeemed while they are waiting to be transferred.

CHECKWRITING.  To write checks against your Fund account, request that privilege
on your account Application,  or contact the Transfer Agent for signature cards.
They must be signed  (with a signature  guarantee)  by all owners of the account
and  returned  to the  Transfer  Agent so that checks can be sent to you to use.
Shareholders  with joint  accounts can elect in writing to have checks paid over
the  signature  of one  owner.  If you  previously  signed a  signature  card to
establish  checkwriting in another  Oppenheimer fund, simply call 1-800-525-7048
to request  checkwriting for an account in this Fund with the same  registration
as the other account.
o  Checks  can be  written  to the order of  whomever  you wish,  but may not be
   cashed at the bank the checks are  payable  through or the Fund's bank or the
   Custodian bank.
o  Checkwriting  privileges  are not available for accounts  holding shares that
   are subject to a contingent deferred sales charge.
o     Checks must be written for at least $100.
o  Checks  cannot be paid if they are written for more than your account  value.
   Remember,  your  shares  fluctuate  in value and you should not write a check
   close to the total account value.
o  You may not write a check that would  require the Fund to redeem  shares that
   were  purchased by check or Asset Builder Plan  payments  within the prior 10
   days.
o  Don't use your  checks if you changed  your Fund  account  number,  until you
   receive new checks.

Can You Sell Shares Through Your Dealer?  The Distributor has made  arrangements
to repurchase Fund shares from dealers and brokers on behalf of their customers.
Brokers or dealers may charge for that  service.  If your shares are held in the
name of your dealer, you must redeem them through your dealer.

How to Exchange Shares

Shares of the Fund may be exchanged for shares of certain  Oppenheimer  funds at
net asset value per share at the time of  exchange,  without  sales  charge.  To
exchange shares, you must meet several conditions:
o  Shares of the fund  selected for exchange  must be available for sale in your
   state of residence.
o  The  prospectuses of this Fund and the fund whose shares you want to buy must
   offer the exchange privilege.
o  You must hold the shares you buy when you establish your account for at least
   7 days before you can exchange  them.  After the account is open 7 days,  you
   can exchange shares every regular business day.
o  You must meet the minimum purchase requirements for the fund whose shares you
   purchase by exchange.
o Before exchanging into a fund, you must obtain and read its prospectus.

      Shares of a particular  class of the Fund may be exchanged only for shares
of the same class in the other Oppenheimer funds. For example,  you can exchange
Class A shares of this Fund only for  Class A shares of  another  fund.  In some
cases, sales charges may be imposed on exchange transactions.  For tax purposes,
exchanges  of  shares  involve  a sale of the  shares  of the fund you own and a
purchase of the shares of the other fund,  which may result in a capital gain or
loss.  Please refer to "How to Exchange  Shares" in the  Statement of Additional
Information for more details.

      You can find a list of Oppenheimer funds currently available for exchanges
in the  Statement of Additional  Information  or obtain one by calling a service
representative at 1-800-525-7048. That list can change from time to time.

HOW DO I SUBMIT EXCHANGE REQUESTS? Exchanges may be requested in writing or by
telephone:

o    Written Exchange Requests.  Submit an  OppenheimerFunds  Exchange Request
     form, signed by all owners of the account. Send it to the Transfer Agent at
     the address on the Back Cover.

o  Telephone Exchange  Requests.  Telephone exchange requests may be made either
   by calling a service representative at 1-800-852-8457,  or by using PhoneLink
   for automated exchanges by calling 1-800-533-3310. Telephone exchanges may be
   made only  between  accounts  that are  registered  with the same name(s) and
   address. Shares held under certificates may not be exchanged by telephone.

ARE THERE  LIMITATIONS  ON EXCHANGES?  There are certain  exchange  policies you
should be aware of:

o  Shares are normally redeemed from one fund and purchased from the other fund
   in the exchange  transaction  on the same  regular  business day on which the
   Transfer  Agent  receives an exchange  request that  conforms to the policies
   described  above.  It must be  received  by the  close of The New York  Stock
   Exchange  that day,  which is normally  4:00 P.M.  but may be earlier on some
   days.  However,  either fund may delay the purchase of shares of the fund you
   are  exchanging  into  up  to  seven  days  if  it  determines  it  would  be
   disadvantaged by a same-day  exchange.  For example,  the receipt of multiple
   exchange  requests  from a  "market  timer"  might  require  the Fund to sell
   securities at a disadvantageous time and/or price.
o  Because  excessive  trading can hurt fund performance and harm  shareholders,
   the Fund  reserves the right to refuse any exchange  request that it believes
   will disadvantage it, or to refuse multiple exchange requests  submitted by a
   shareholder or dealer.
o  The Fund may amend,  suspend or terminate the exchange privilege at any time.
   Although  the  Fund  will  attempt  to  provide  you  notice  whenever  it is
   reasonably able to do so, it may impose these changes at any time.
o  If the Transfer Agent cannot exchange all the shares you request because of a
   restriction  cited  above,  only the shares  eligible  for  exchange  will be
   exchanged.

Shareholder Account Rules and Policies

The  offering  of  shares  may be  suspended  during  any  period  in which  the
determination of net asset value is suspended, and the offering may be suspended
by the Board of Trustees at any time the Board believes it is in the Fund's best
interest to do so.

Telephone Transaction Privileges for purchases,  redemptions or exchanges may be
modified,  suspended or  terminated  by the Fund at any time.  If an account has
more  than  one  owner,  the  Fund  and  the  Transfer  Agent  may  rely  on the
instructions of any one owner.  Telephone  privileges apply to each owner of the
account  and the  dealer  representative  of record for the  account  unless the
Transfer Agent receives cancellation instructions from an owner of the account.

The Transfer  Agent will record any  telephone  calls to verify data  concerning
transactions  and  has  adopted  other  procedures  to  confirm  that  telephone
instructions  are genuine,  by requiring  callers to provide tax  identification
numbers  and  other  account  data or by  using  PINs,  and by  confirming  such
transactions in writing.  The Transfer Agent and the Fund will not be liable for
losses or expenses arising out of telephone instructions  reasonably believed to
be genuine.

Redemption or transfer  requests  will not be honored  until the Transfer  Agent
receives all required  documents in proper form. From time to time, the Transfer
Agent in its discretion may waive certain of the  requirements  for  redemptions
stated in this Prospectus.

Dealers that can perform account transactions for their clients by participating
in  NETWORKING  through  the  National  Securities   Clearing   Corporation  are
responsible   for  obtaining   their   clients'   permission  to  perform  those
transactions,  and are responsible to their clients who are  shareholders of the
Fund if the dealer performs any transaction erroneously or improperly.

The  redemption  price for shares will vary from day to day because the value of
the securities in the Fund's portfolio  fluctuates.  The redemption price, which
is the net asset value per share, will normally differ for each class of shares.
The  redemption  value of your  shares may be more or less than  their  original
cost.

Payment for  redeemed  shares  ordinarily  is made in cash.  It is  forwarded by
check,  through  AccountLink (as elected by the  shareholder)  within seven days
after the  Transfer  Agent  receives  redemption  instructions  in proper  form.
However,  under unusual circumstances  determined by the Securities and Exchange
Commission,  payment may be delayed or suspended. For accounts registered in the
name of a  broker-dealer,  payment  will  normally  be  forwarded  within  three
business days after redemption.

The  Transfer  Agent may delay  forwarding  a check or  processing a payment via
AccountLink for recently  purchased shares,  but only until the purchase payment
has cleared.  That delay may be as much as 10 days from the date the shares were
purchased.  That delay may be avoided if you  purchase  shares by federal  funds
wire or  certified  check,  or arrange  with your bank to provide  telephone  or
written assurance to the Transfer Agent that your purchase payment has cleared.

Involuntary redemptions of small accounts may be made by the Fund if the account
value has  fallen  below  $200 for  reasons  other than the fact that the market
value of shares has dropped.  In some cases involuntary  redemptions may be made
to repay the  Distributor  for losses from the  cancellation  of share  purchase
orders.

Shares may be "redeemed in kind" under unusual  circumstances (such as a lack of
liquidity  in the Fund's  portfolio  to meet  redemptions).  This means that the
redemption proceeds will be paid with securities from the Fund's portfolio.

"Backup  Withholding"  of  federal  income tax may be  applied  against  taxable
dividends,  distributions and redemption proceeds  (including  exchanges) if you
fail to furnish the Fund your  correct,  certified  Social  Security or Employer
Identification  Number when you sign your  application,  or if you  under-report
your income to the Internal Revenue Service.

To avoid sending duplicate copies of materials to households, the Fund will mail
only one copy of each annual and semi-annual  report to shareholders  having the
same last name and address on the Fund's records.  However, each shareholder may
call the Transfer Agent at  1-800-525-7048 to ask that copies of those materials
be sent personally to that shareholder.

Dividends and Taxes

DIVIDENDS. The Fund intends to declare dividends separately for Class A, Class B
and Class C shares from net tax-exempt  income and/or net investment income each
regular  business day and to pay those  dividends to  shareholders  monthly on a
date selected by the Board of Trustees.  Daily dividends will not be declared or
paid on newly  purchased  shares until  Federal  Funds are available to the Fund
from the purchase payment for such shares.

      The Fund attempts to pay dividends on Class A shares at a constant  level.
There is no  assurance  that it will be able to do so. The Board of Trustees may
change  the  targeted  dividend  level at any  time,  without  prior  notice  to
shareholders.  Additionally, the amount of those dividends and the distributions
paid on class B and C shares may vary over time, depending on market conditions,
the  composition of the Fund's  portfolio,  and expenses borne by the particular
class of  shares.  Dividends  and  distributions  paid on  Class A  shares  will
generally  be higher than for Class B and Class C shares,  which  normally  have
higher  expenses  than Class A. The Fund cannot  guarantee  that it will pay any
dividends or distributions.

CAPITAL  GAINS.  Although the Fund does not seek capital  gains,  it may realize
capital  gains  on the sale of  portfolio  securities.  If it does,  it may make
distributions  out of any net short-term or long-term  capital gains in December
of each year.  The Fund may make  supplemental  distributions  of dividends  and
capital gains following the end of its fiscal year. Long-term capital gains will
be separately identified in the tax information the Fund sends you after the end
of the calendar year.

WHAT CHOICES DO I HAVE FOR RECEIVING DISTRIBUTIONS?  When you open your account,
specify  on  your  application  how you  want  to  receive  your  dividends  and
distributions. You have four options:

Reinvest All  Distributions in the Fund. You can elect to reinvest all dividends
and long-term capital gains distributions in additional shares of the Fund.

Reinvest   Dividends  or  Capital   Gains.   You  can  elect  to  reinvest  some
distributions  (dividends,  short-term  capital gains or long-term capital gains
distributions)  in the Fund while receiving the other types of  distributions by
check or having them sent to your bank account through AccountLink.

Receive  All  Distributions  in Cash.  You can elect to  receive a check for all
dividends and long-term  capital gains  distributions  or have them sent to your
bank through AccountLink.

Reinvest  Your  Distributions  in  Another  OppenheimerFunds  Account.  You  can
reinvest   all   distributions   in  the  same   class  of  shares  of   another
OppenheimerFunds account you have established.

TAXES. Dividends paid from net investment income earned by the Fund on municipal
securities  will be excludable from gross income for federal  individual  income
tax  purposes.  A portion of a dividend  that is derived from  interest  paid on
certain  "private  activity  bonds" may be an item of tax  preference if you are
subject to the  alternative  minimum tax. If the Fund earns  interest on taxable
investments,  any  dividends  derived  from  those  earnings  will be taxable as
ordinary income to shareholders.

      Dividends  paid  by  the  Fund  from  interest  on  California   municipal
securities  will be exempt from  California  individual  income taxes, if at the
close  of each  quarter  at least  50% of the  value of the  Fund's  assets  are
invested in debt obligations that pay interest exempt from California individual
income taxes.  Dividends paid from income from  municipal  securities of issuers
outside  California  will  normally be subject to California  individual  income
taxes.

      Dividends and capital gains distributions may be subject to state or local
taxes.  Long-term  capital  gains are taxable as  long-term  capital  gains when
distributed to shareholders,  and may be taxable at different rates depending on
how long the Fund  holds the  asset.  It does not  matter how long you have held
your  shares.  Dividends  paid from  short-term  capital  gains are  taxable  as
ordinary income. Whether you reinvest your distributions in additional shares or
take them in cash, the tax treatment is the same.  Every year the Fund will send
you and the IRS a statement  showing the amount of any taxable  distribution you
received in the previous year as well as the amount of your tax-exempt income.

Remember,  There May be Taxes on  Transactions.  Even  though  the Fund seeks to
distribute  tax-exempt  income to  shareholders,  you may have a capital gain or
loss  when you sell or  exchange  your  shares.  A  capital  gain or loss is the
difference  between the price you paid for the shares and the price you received
when you sold them. Any capital gain is subject to capital gains tax.

Returns of Capital Can Occur. In certain cases,  distributions  made by the Fund
may be  considered  a  non-taxable  return of capital to  shareholders.  If that
occurs, it will be identified in notices to shareholders.

      This  information  is  only  a  summary  of  certain  federal  income  tax
information  about your  investment.  You should  consult  with your tax adviser
about the effect of an investment in the Fund on your particular tax situation.


<PAGE>


Financial Highlights

The Financial  Highlights  Table is presented to help you  understand the Fund's
financial  performance for the past 5 fiscal years. 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 the Fund,  assuming  reinvestment  of all dividends and  distributions.  This
information has been audited by KPMG LLP, the Fund's independent auditors, whose
report, along with the Fund's financial statements, is included in the Statement
of Additional Information, which is available on request.


<PAGE>

--------------------------------------------------------------------------------
Financial Highlights
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>





Year Ended    |         Year Ended|

July 31,    |       December 31,|
Class A                                                  1999        1998
1997          1996(1)|    1995       1994|
==========================================================================================================================
Per Share Operating Data
<S>                                                  <C>         <C>
<C>           <C>         <C>         <C>
Net asset value, beginning of period                   $10.92      $10.94
$10.39        $10.69      $ 9.45      $10.97
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                     .53         .54
 .58           .33         .58         .60
Net realized and unrealized gain (loss)                  (.35)        .06
 .54          (.30)       1.25       (1.51)
                                                       ------      ------
------        ------      ------      ------
Total income (loss) from
investment operations                                     .18         .60
1.12           .03        1.83        (.91)

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

Dividends and distributions to shareholders:
Dividends from net investment income                     (.53)       (.54)
(.57)         (.33)       (.58)       (.61)
Dividends in excess of net
investment income                                          --          --
--            --        (.01)         --
Distributions from net realized gain                       --        (.08)
--            --          --          --
                                                       ------      ------
------        ------      ------      ------
Total dividends and distributions
to shareholders                                          (.53)       (.62)
(.57)         (.33)       (.59)       (.61)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                         $10.57      $10.92
$10.94        $10.39      $10.69      $ 9.45
                                                       ======      ======
======        ======      ======      ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                      1.59%       5.66%
11.11%         0.34%      19.76%      (8.49)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                       $316,363    $300,717
$298,162      $286,033    $285,307    $219,682
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                    $314,094    $297,372
$289,439      $279,796    $250,188    $248,850
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                    4.79%       4.91%
5.49%         5.53%       5.64%       5.99%
Expenses                                                 0.91%       0.92%(4)
0.94%(4)      0.97%(4)    0.95%(4)    0.96%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                 35%         31%
31%           14%         23%         22%
</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  31  Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Financial Highlights  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>





Year Ended|        Year Ended|

July 31,|      December 31,|
Class B                                                      1999
1998        1997    1996(1)|    1995      1994|
==========================================================================================================================
Per Share Operating Data
<S>                                                      <C>           <C>
<C>        <C>      <C>        <C>
Net asset value, beginning of period                       $10.92
$10.94      $10.39     $10.69   $ 9.44     $10.98
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45
 .46         .49        .28      .51        .54
Net realized and unrealized gain (loss)                      (.35)
 .06         .55       (.30)    1.25      (1.55)
                                                           ------
------      ------     ------   ------     ------
Total income (loss) from
investment operations                                         .10
 .52        1.04       (.02)    1.76      (1.01)

--------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)
(.46)       (.49)      (.28)    (.50)      (.53)
Dividends in excess of net
investment income                                              --
--          --         --     (.01)        --
Distributions from net realized gain                           --
(.08)         --         --       --         --
                                                           ------
------      ------     ------   ------     ------
Total dividends and distributions
to shareholders                                              (.45)
(.54)       (.49)      (.28)    (.51)      (.53)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.57
$10.92      $10.94     $10.39   $10.69     $ 9.44
                                                           ======
======      ======     ======   ======     ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                          0.82%
4.86%      10.27%     (0.12)%  18.97%     (9.39)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                           $132,763      $115,444
$82,474    $52,038  $41,224    $20,224
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                        $129,538      $ 99,266
$65,192    $46,422  $29,918    $16,552
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%
4.21%       4.70%      4.74%    4.82%      5.17%
Expenses                                                     1.67%
1.67%(4)    1.70%(4)   1.74%(4) 1.72%(4)   1.73%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%
31%         31%        14%      23%        22%
</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  32   Oppenheimer California Municipal Fund


<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>




Year|      Period|

Ended|       Ended|

July 31,|    Dec. 31,|
Class C                                                      1999
1998        1997    1996(1)|     1995(6)|
--------------------------------------------------------------------------------------------------------------------
Per Share Operating Data
<S>                                                       <C>           <C>
<C>        <C>           <C>
Net asset value, beginning of period                       $10.91
$10.93      $10.38     $10.68        $10.46
--------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45
 .46         .49        .27           .08
Net realized and unrealized gain (loss)                      (.36)
 .06         .55       (.30)          .22
                                                           ------
------      ------     ------        ------
Total income (loss) from
investment operations                                         .09
 .52        1.04       (.03)          .30

--------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)
(.46)       (.49)      (.27)         (.07)
Dividends in excess of net
investment income                                              --
--          --         --          (.01)
Distributions from net realized gain                           --
(.08)         --         --            --
                                                           ------
------     ------     ------        ------
Total dividends and distributions
to shareholders                                              (.45)
(.54)       (.49)      (.27)         (.08)
--------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.55
$10.91      $10.93     $10.38        $10.68
                                                           ======
======      ======     ======        ======

====================================================================================================================
Total Return, at Net Asset Value(2)                          0.73%
4.87%      10.26%     (0.19)%        2.90%

====================================================================================================================
Ratios/Supplemental Data
Net assets, end of period (in thousands)                  $16,864
$11,340      $5,969     $2,171          $125
--------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                         $14,672       $
8,614      $3,869     $1,156          $ 91
--------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%
4.24%       4.66%      4.54%         4.56%
Expenses                                                     1.67%
1.66%(4)    1.70%(4)   1.80%(4)      1.68%(4)
--------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%
31%         31%        14%           23%

</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were  $206,390,312 and $160,398,205,  respectively.  6. For
the period from November 1, 1995 (inception of offering) to December 31, 1995.



                 33   Oppenheimer California Municipal Fund

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


<PAGE>


For More Information About Oppenheimer California Municipal Fund:
--------------------------------------------------------------------------------

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


The following additional  information about the Fund is available without charge
upon request:


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





--------------------------------------------------------------------------------
            STATEMENT OF ADDITIONAL INFORMATION
--------------------------------------------------------------------------------


This  document  includes  additional  information  about the  Fund's  investment
policies,  risks,  and  operations.  It is  incorporated  by reference into this
Prospectus (which means it is legally part of this Prospectus).


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

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


            ANNUAL AND SEMI-ANNUAL REPROTS


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


Additional information about the Fund's investments and performance is available
in the Fund's Annual and Semi-Annual Reports to shareholders.  The Annual Report
includes a  discussion  of market  conditions  and  investment  strategies  that
significantly affected the Fund's performance during its last fiscal year.


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

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


How to Get More Information


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


You can  request  the  Statement  of  Additional  Information,  the  Annual  and
Semi-Annual Reports, and other information about the Fund or your account:


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


By Telephone:


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


Call OppenheimerFunds Services toll-free:


--------------------------------------------------------------------------------
1-800-525-7048

By Mail:
Write to:
OppenheimerFunds Services
P.O. Box 5270
Denver, Colorado 80217-5270

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


On the Internet:


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


You can read or down-load documents on the OppenheimerFunds web site:


--------------------------------------------------------------------------------
http://www.oppenheimerfunds.com

You can also obtain copies of the Statement of Additional  Information and other
Fund  documents  and  reports by visiting  the SEC's  Public  Reference  Room in
Washington,  D.C.  (Phone  1-800-SEC-0330)  or the  SEC's  Internet  web site at
http://www.sec.gov.  Copies may be obtained upon payment of a duplicating fee by
writing to the SEC's Public Reference Section, Washington, D.C. 20549-6009.

No one has been authorized to provide any information  about the Fund or to make
any  representations  about  the  Fund  other  than  what is  contained  in this
Prospectus.  This  Prospectus is not an offer to sell shares of the Fund,  nor a
solicitation  of an offer to buy shares of the Fund,  to any person in any state
or other jurisdiction where it is unlawful to make such an offer.

The Fund's shares are distributed by:
SEC File No. 811-5586
PR0790.1199  Printed on recycled paper.
--------------------------------------------------------------------------------


<PAGE>


                            Oppenheimer California Municipal Fund
--------------------------------------------------------------------------------

Two World Trade Center, New York, New York 10048-0203
1-800-525-7048

Statement of Additional Information dated November 22, 1999

      This  Statement  of  Additional  Information  is  not a  Prospectus.  This
document  contains  additional   information  about  the  Fund  and  supplements
information  in the  Prospectus  dated  November  22,  1999.  It  should be read
together  with the  Prospectus,  which may be  obtained by writing to the Fund's
Transfer Agent,  OppenheimerFunds  Services, at P.O. Box 5270, Denver,  Colorado
80217 or by calling the Transfer Agent at the toll-free number shown above or by
downloading    it   from   the    OppenheimerFunds    Internet   web   site   at
www.oppenheimerfunds.com.

Contents                                                                    Page
About the Fund
Additional Information About the Fund's Investment Policies and Risks........2
     The Fund's Investment Policies..........................................2
     Municipal Securities....................................................2
     Other Investment Techniques and Strategies.............................10
     Investment Restrictions................................................21
How the Fund is Managed.....................................................24
     Organization and History...............................................24
     Trustees and Officers of the Fund......................................25
     The Manager ...........................................................31
Brokerage Policies of the Fund..............................................32
Distribution and Service Plans..............................................34
Performance of the Fund.....................................................37
                                                About Your Account
How To Buy Shares...........................................................42
How To Sell Shares..........................................................49
How to Exchange Shares......................................................54
Dividends and Taxes.........................................................56
Additional Information About the Fund.......................................59

Financial Information About the Fund
Independent Auditors' Report................................................60
Financial Statements .......................................................61
Appendix A: Municipal Bond Ratings.........................................A-1
Appendix B: Industry Classifications.......................................B-1
Appendix  C:  Special  Sales  Charge Arrangements and Waivers      C-1
--------------------------------------------------------------------------------


<PAGE>


ABOUT THE FUND
--------------------------------------------------------------------------------

           Additional Information About the Fund's Investment Policies and Risks

      The investment objective and the principal investment policies of the Fund
are  described  in the  Prospectus.  This  Statement of  Additional  Information
contains  supplemental  information  about  those  policies  and  the  types  of
securities  that the Fund's  investment  Manager,  OppenheimerFunds,  Inc., will
select  for the  Fund.  Additional  explanations  are also  provided  about  the
strategies the Fund may use to try to achieve its objective.

The Fund's  Investment  Policies.  The Fund does not make  investments  with the
objective of seeking capital growth,  since that would generally be inconsistent
with its goal of seeking tax-exempt income. However, the value of the securities
held by the Fund may be affected by changes in general  interest rates.  Because
the current value of debt securities varies inversely with changes in prevailing
interest rates, if interest rates increased after a security was purchased, that
security  would normally  decline in value.  Conversely,  should  interest rates
decrease after a security was purchased, normally its value would rise.

      However, those fluctuations in value will not generally result in realized
gains or  losses  to the  Fund  unless  the Fund  sells  the  security  prior to
maturity.  A debt  security held to maturity is redeemable by its issuer at full
principal  value plus  accrued  interest.  The Fund does not  usually  intend to
dispose of securities prior to their maturity,  but may do so for liquidity,  or
because of other factors affecting the issuer that cause the Manager to sell the
particular  security.  In that case, the Fund could experience a capital gain or
loss on the sale.

      There are variations in the credit quality of municipal  securities,  both
within a particular rating  classification  and between  classifications.  These
variations depend on numerous factors. The yields of municipal securities depend
on a number of factors, including general conditions in the municipal securities
market,  the size of a particular  offering,  the maturity of the obligation and
rating (if any) of the issue.  These  factors are  discussed  in greater  detail
below.

Municipal  Securities.  The types of municipal  securities in which the Fund may
invest are  described in the  Prospectus  under "About the Fund's  Investments."
Municipal  securities  are  generally  classified as general  obligation  bonds,
revenue bonds and notes.  A discussion of the general  characteristics  of these
principal types of municipal securities follows below.

      Municipal  Bonds. We have classified  longer term municipal  securities as
"municipal bonds." The principal  classifications  of long-term  municipal bonds
are "general  obligation"  and "revenue"  (including  "industrial  development")
bonds. They may have fixed, variable or floating rates of interest, as described
below.

      Some bonds may be  "callable,"  allowing  the issuer to redeem them before
their maturity date. To protect  bondholders,  callable bonds may be issued with
provisions that prevent them from being called for a period of time.  Typically,
that is 5 to 10 years from the issuance date.  When interest  rates decline,  if
the call protection on a bond has expired, it is more likely that the issuer may
call the bond.  If that occurs,  the Fund might have to reinvest the proceeds of
the called bond in bonds that pay a lower rate of return.

            General   Obligation   Bonds.  The  basic  security  behind  general
obligation bonds is the issuer's pledge of its full faith and credit and taxing,
if any,  power for the  repayment  of  principal  and the  payment of  interest.
Issuers of general obligation bonds include states, counties, cities, towns, and
regional  districts.  The proceeds of these  obligations are used to fund a wide
range of public  projects,  including  construction  or  improvement of schools,
highways and roads,  and water and sewer systems.  The rate of taxes that can be
levied  for the  payment  of debt  service  on these  bonds  may be  limited  or
unlimited. Additionally, there may be limits as to the rate or amount of special
assessments that can be levied to meet these obligations.

            Revenue  Bonds.  The  principal  security  for  a  revenue  bond  is
generally  the  net  revenues  derived  from a  particular  facility,  group  of
facilities,  or, in some cases,  the  proceeds of a special  excise tax or other
specific  revenue source.  Revenue bonds are issued to finance a wide variety of
capital  projects.  Examples  include  electric,  gas,  water and sewer systems;
highways,  bridges,  and  tunnels;  port and airport  facilities;  colleges  and
universities; and hospitals.

      Although  the  principal  security  for these types of bonds may vary from
bond to bond,  many  provide  additional  security in the form of a debt service
reserve fund that may be used to make  principal  and  interest  payments on the
issuer's obligations. Housing finance authorities have a wide range of security,
including   partially  or  fully  insured  mortgages,   rent  subsidized  and/or
collateralized  mortgages,  and/or the net revenues from housing or other public
projects.  Some  authorities  provide further  security in the form of a state's
ability (without obligation) to make up deficiencies in the debt service reserve
fund.

            Industrial  Development  Bonds.  Industrial  development  bonds  are
considered  municipal  bonds if the interest paid is exempt from federal  income
tax.  They are issued by or on behalf of public  authorities  to raise  money to
finance various privately  operated  facilities for business and  manufacturing,
housing,  sports, and pollution control. These bonds may also be used to finance
public  facilities such as airports,  mass transit systems,  ports, and parking.
The payment of the principal  and interest on such bonds is dependent  solely on
the ability of the  facility's  user to meet its financial  obligations  and the
pledge,  if any, of real and personal  property financed by the bond as security
for those payments.

            Mello-Roos  Bonds.  These are  bonds  issued  under  the  California
Mello-Roos  Community  Facilities  Act. They are used to finance  infrastructure
projects,  such as roads or sewage  treatment  plants.  In most  cases  they are
secured by real estate taxes levied on property located in the same community as
the project.  This type of financing was created in response to statutory limits
on real  property  taxes  that  were  enacted  in  California.  The bonds do not
constitute an obligation of a municipal government.  Timely payment of principal
and  interest  depends on the ability of the  developer  of the project or other
property  owners to pay their  real  estate  taxes.  Therefore  these  bonds are
subject  to risks of  nonpayment  as a result of a general  economic  decline or
decline  in the real  estate  market,  as well as the  credit  risk  that of the
developer.

            Private Activity  Municipal  Securities.  The Tax Reform Act of 1986
(the "Tax Reform Act") reorganized,  as well as amended, the rules governing tax
exemption for interest on certain types of municipal securities.  The Tax Reform
Act  generally  did not change  the tax  treatment  of bonds  issued in order to
finance  governmental  operations.  Thus,  interest on general  obligation bonds
issued by or on behalf of state or local governments,  the proceeds of which are
used to finance the operations of such governments,  continues to be tax-exempt.
However,   the  Tax  Reform  Act  limited  the  use  of  tax-exempt   bonds  for
non-governmental  (private) purposes. More stringent restrictions were placed on
the use of proceeds of such bonds. Interest on certain private activity bonds is
taxable  under  the  revised  rules.  There  is  an  exception  for  "qualified"
tax-exempt private activity bonds, for example,  exempt facility bonds including
certain  industrial  development  bonds,  qualified  mortgage  bonds,  qualified
Section 501(c)(3) bonds, and qualified student loan bonds.

      In addition,  limitations as to the amount of private activity bonds which
each state may issue were  revised  downward by the Tax Reform  Act,  which will
reduce the supply of such  bonds.  The value of the  Fund's  portfolio  could be
affected if there is a reduction in the availability of such bonds.

      Interest on certain  private  activity  bonds issued after August 7, 1986,
which  continues  to be  tax-exempt,  will be treated as a tax  preference  item
subject  to the  alternative  minimum  tax  (discussed  below) to which  certain
taxpayers are subject.  The Fund may hold  municipal  securities the interest on
which (and thus a proportionate share of the  exempt-interest  dividends paid by
the Fund) will be subject to the federal  alternative minimum tax on individuals
and corporations.

      The federal alternative minimum tax is designed to ensure that all persons
who receive  income pay some tax,  even if their  regular  tax is zero.  This is
accomplished in part by including in taxable income certain tax preference items
that are used to calculate  alternative  minimum taxable income.  The Tax Reform
Act  made  tax-exempt  interest  from  certain  private  activity  bonds  a  tax
preference item for purposes of the  alternative  minimum tax on individuals and
corporations.  Any  exempt-interest  dividend  paid  by a  regulated  investment
company will be treated as interest on a specific  private  activity bond to the
extent of the  proportionate  relationship  the interest the investment  company
receives on such bonds bears to all its exempt interest dividends.

      In addition,  corporate  taxpayers subject to the alternative  minimum tax
may,  under some  circumstances,  have to include  exempt-interest  dividends in
calculating  their  alternative  minimum  taxable  income.  That could  occur in
situations where the "adjusted current earnings" of the corporation  exceeds its
alternative minimum taxable income.

      To determine whether a municipal  security is treated as a taxable private
activity  bond,  it is subject to a test for:  (a) a trade or  business  use and
security  interest,  or (b) a  private  loan  restriction.  Under  the  trade or
business use and security  interest  test, an  obligation is a private  activity
bond if: (i) more than 10% of the bond  proceeds  are used for private  business
purposes  and (ii) 10% or more of the  payment of  principal  or interest on the
issue is directly or  indirectly  derived from such private use or is secured by
the privately used property or the payments  related to the use of the property.
For certain types of uses, a 5% threshold is substituted for this 10% threshold.

      The term  "private  business  use" means any direct or  indirect  use in a
trade or business  carried on by an  individual  or entity other than a state or
municipal  governmental unit. Under the private loan restriction,  the amount of
bond proceeds that may be used to make private loans is limited to the lesser of
5% or $5.0 million of the proceeds. Thus, certain issues of municipal securities
could lose their  tax-exempt  status  retroactively  if the issuer fails to meet
certain  requirements as to the expenditure of the proceeds of that issue or the
use of the bond-financed  facility. The Fund makes no independent  investigation
of the users of such bonds or their use of  proceeds  of the bonds.  If the Fund
should hold a bond that loses its tax-exempt status  retroactively,  there might
be  an  adjustment  to  the   tax-exempt   income   previously   distributed  to
shareholders.

      Additionally,  a private activity bond that would otherwise be a qualified
tax-exempt  private  activity bond will not, under Internal Revenue Code Section
147(a),  be a qualified  bond for any period during which it is held by a person
who is a "substantial user" of the facilities or by a "related person" of such a
substantial user. This "substantial  user" provision applies primarily to exempt
facility bonds,  including industrial  development bonds. The Fund may invest in
industrial  development bonds and other private activity bonds.  Therefore,  the
Fund may not be an appropriate  investment  for entities which are  "substantial
users" (or persons  related to "substantial  users") of such exempt  facilities.
Those entities and persons should consult their tax advisers  before  purchasing
shares of the Fund.

      A  "substantial  user"  of  such  facilities  is  defined  generally  as a
"non-exempt  person who  regularly  uses part of a facility"  financed  from the
proceeds  of exempt  facility  bonds.  Generally,  an  individual  will not be a
"related  person" under the Internal  Revenue Code unless such individual or the
individual's   immediate  family  (spouse,   brothers,   sisters  and  immediate
descendants)  own directly or indirectly in the aggregate more than 50% in value
of the equity of a corporation or partnership which is a "substantial user" of a
facility financed from the proceeds of exempt facility bonds.

         Municipal  Notes.  Municipal  securities  having a  maturity  (when the
security  is  issued)  of less than one year are  generally  known as  municipal
notes.  Municipal  notes  generally are used to provide for  short-term  working
capital needs.  Some of the types of municipal  notes the Fund can invest in are
described below.

         Tax  Anticipation  Notes.  These are issued to finance  working capital
         needs of municipalities.  Generally, they are issued in anticipation of
         various  seasonal  tax  revenue,  such as income,  sales,  use or other
         business taxes, and are payable from these specific future taxes.

         Revenue  Anticipation  Notes.  These are notes issued in expectation of
         receipt of other types of revenue,  such as federal revenues  available
         under federal revenue-sharing programs.

         Bond Anticipation  Notes. Bond anticipation notes are issued to provide
         interim  financing  until  long-term  financing  can be  arranged.  The
         long-term  bonds that are issued  typically  also provide the money for
         the repayment of the notes.

         Construction Loan Notes. These are sold to provide project construction
         financing until permanent  financing can be secured.  After  successful
         completion  and  acceptance  of the project,  it may receive  permanent
         financing  through  public  agencies,   such  as  the  Federal  Housing
         Administration.

         Tax-Exempt   Commercial  Paper.  This  type  of  short-term  obligation
  (usually  having a maturity of 270 days or less is issued by a municipality to
  meet current working capital needs.

         Municipal Lease Obligations.  The Fund's investments in municipal lease
  obligations may be through  certificates of participation  that are offered to
  investors by public entities. Municipal leases may take the form of a lease or
  an  installment  purchase  contract  issued  by a state  or  local  government
  authority  to  obtain  funds  to  acquire  a wide  variety  of  equipment  and
  facilities.

      Some municipal lease securities may be deemed to be "illiquid" securities.
Their  purchase  by the Fund would be limited as  described  below in  "Illiquid
Securities."  From  time to time  the Fund may  invest  more  than 5% of its net
assets in municipal  lease  obligations  that the Manager has  determined  to be
liquid under guidelines set by the Board of Trustees.

     Those guidelines  require the Manager to evaluate:  the frequency of trades
and  price  quotations  for such  securities;  the  number of  dealers  or other
potential buyers willing to purchase or sell such  securities;  the availability
of market-makers; and the nature of the trades for such securities.

      While the Fund holds such  securities,  the Manager will also evaluate the
likelihood of a continuing market for these securities and their credit quality.

      Municipal  leases  have  special  risk   considerations.   Although  lease
obligations do not constitute general  obligations of the municipality for which
the  municipality's  taxing power is pledged,  a lease  obligation is ordinarily
backed by the  municipality's  covenant to budget for,  appropriate and make the
payments due under the lease  obligation.  However,  certain  lease  obligations
contain  "non-appropriation"  clauses which provide that the municipality has no
obligation to make lease or installment purchase payments in future years unless
money is appropriated  for that purpose on a yearly basis.  While the obligation
might be secured by the lease, it might be difficult to dispose of that property
in case of a default.

      Projects  financed with  certificates of  participation  generally are not
subject to state constitutional debt limitations or other statutory requirements
that may apply to other municipal  securities.  Payments by the public entity on
the obligation  underlying the certificates  are derived from available  revenue
sources.  That  revenue  might be  diverted  to the  funding of other  municipal
service  projects.  Payments of interest  and/or  principal  with respect to the
certificates  are not  guaranteed and do not constitute an obligation of a state
or any of its political subdivisions.

      In addition to the risk of "non-appropriation," municipal lease securities
do not have as highly liquid a market as conventional municipal bonds. Municipal
leases,  like  other  municipal  debt  obligations,  are  subject to the risk of
non-payment of interest or repayment of principal by the issuer.  The ability of
issuers of  municipal  leases to make timely  lease  payments  may be  adversely
affected in general economic downturns and as relative governmental cost burdens
are reallocated among federal,  state and local governmental units. A default in
payment of income would  result in a reduction  of income to the Fund.  It could
also result in a reduction in the value of the municipal lease and that, as well
as a default in  repayment of  principal,  could result in a decrease in the net
asset value of the Fund.

      Ratings of Municipal Securities.  Ratings by ratings organizations such as
Moody's Investors  Service,  Standard & Poor's  Corporation and Fitch IBCA, Inc.
represent the respective  rating agency's  opinions of the credit quality of the
municipal securities they undertake to rate. However,  their ratings are general
opinions and are not guarantees of quality.  Municipal  securities that have the
same  maturity,  coupon  and  rating  may have  different  yields,  while  other
municipal  securities  that have the same  maturity  and  coupon  but  different
ratings may have the same yield.

      Lower grade  securities may have a higher yield than  securities  rated in
the higher  rating  categories.  In addition to having a greater risk of default
than  higher-grade,  securities,  there  may  be  less  of a  market  for  these
securities.  As a result they may be harder to sell at an acceptable  price. The
additional  risks mean that the Fund may not  receive the  anticipated  level of
income from these securities,  and the Fund's net asset value may be affected by
declines in the value of lower-grade securities. However, because the added risk
of lower quality  securities  might not be consistent  with the Fund's policy of
preservation  of  capital,  the Fund  limits its  investments  in lower  quality
securities.

      Subsequent to its purchase by the Fund, a municipal  security may cease to
be rated or its rating may be reduced below the minimum required for purchase by
the Fund. Neither event requires the Fund to sell the security,  but the Manager
will consider  such events in  determining  whether the Fund should  continue to
hold the  security.  To the extent that  ratings  given by  Moody's,  Standard &
Poor's, or Fitch change as a result of changes in those rating  organizations or
their  rating  systems,  the Fund will  attempt  to use  comparable  ratings  as
standards for investments in accordance with the Fund's investment policies.

      The  Fund  may buy  municipal  securities  that  are  "pre-refunded."  The
issuer's  obligation to repay the  principal  value of the security is generally
collateralized with U.S. Government securities placed in an escrow account. This
causes the  pre-refunded  security to have essentially the same risks of default
as a AAA-rated security.

      A list of the rating  categories  of Moody's,  S&P and Fitch for municipal
securities  is  contained  in  Appendix  A  to  this   Statement  of  Additional
Information.  Because  the Fund may  purchase  securities  that are  unrated  by
nationally  recognized  rating  organizations,  the  Manager  will  make its own
assessment of the credit  quality of unrated  issues the Fund buys.  The Manager
will use criteria similar to those used by the rating agencies,  and assigning a
rating category to a security that is comparable to what the Manager  believes a
rating agency would assign to that security.  However, the Manager's rating does
not constitute a guarantee of the quality of a particular issue.

Special Risks of Investing Primarily in California Municipal Securities. Because
the Fund focuses its investments  primarily on California municipal  securities,
the  value of its  portfolio  investments  will be  highly  sensitive  to events
affecting   the  fiscal   stability   of  the  State  of   California   and  its
municipalities,  authorities and other  instrumentalities that issue securities.
There have been a number of political  developments,  voter  initiatives,  state
constitutional amendments and legislation in California in recent years that may
affect the ability of the State  government  and  municipal  governments  to pay
interest and repay principal on the securities they have issued. In addition, in
recent years,  the State of California has derived a significant  portion of its
revenues from personal income and sales taxes. Because the amount collected from
these  taxes is  particularly  sensitive  to  economic  conditions,  the State's
revenues have been volatile.

      It is not  possible to predict the future  impact of the  legislation  and
economic considerations described below on the long-term ability of the State of
California or California municipal issuers to pay interest or repay principal on
their  obligations.  In part that is because of possible  inconsistencies in the
terms  of the  various  laws and  Propositions  and the  applicability  of other
statutes  to  these  issues.  The  budgets  of  California  counties  and  local
governments may be significantly affected by state budget decisions beyond their
control.  The information  below about these conditions is only a brief summary,
based upon  information  the Fund has drawn from  sources  that it believes  are
reliable.

      Changes to the State  Constitution.  Changes to the state  constitution in
recent  years have raised  general  concerns  about the ability of the State and
municipal  governments in California to obtain sufficient  revenues to pay their
bond  obligations.  In 1978,  California  voters  approved  Proposition  13,  an
amendment to the state constitution.  The Proposition added a new section to the
constitution  that limits ad valorem  taxes on real  property and  restricts the
ability of local  taxing  entities to increase  real  property  taxes.  However,
legislation  enacted after Proposition 13 provided help to California  municipal
issuers  to raise  revenue  to pay their  bond  obligations.  During  the severe
recession  California  experienced  from  1991 to 1993,  the  State  legislature
eliminated significant components of its aid to local governments. The State has
since increased aid to local  governments and reduced certain mandates for local
services.  Whether  legislation will be enacted in the future to either increase
or reduce the redistribution of State revenues to local governments,  or to make
them less  dependent on State budget  decisions,  cannot be  predicted.  Even if
legislation  increasing  such  distribution  is passed,  it cannot be  predicted
whether it will provide  sufficient  revenue for local municipal  issuers to pay
their bond obligations.

      Another  amendment  to the state  constitution  may also  have an  adverse
impact on state and municipal bond  obligations.  That  amendment  restricts the
state government from spending amounts in excess of appropriation limits imposed
on each state and local government  entity. If revenues exceed the appropriation
limit,  those  revenues  must be returned,  in the form of a revision in the tax
rates or fee schedules.

      Voter Initiatives. California voters have approved a number of initiatives
that affect the ability of the state and  municipalities  to finance  their bond
obligations.  In 1988, California voters approved Proposition 98, which requires
a minimum level of funding for public schools and community  colleges.  In 1986,
voters approved Proposition 62, which had a number of effects. One requires that
any special tax imposed by a local  government  must be approved by a two-thirds
vote of the  electorate.  In 1995,  the  California  Supreme  Court  upheld  the
constitutionality  of  that  Proposition.  That  created  uncertainty  as to the
legality of certain  local taxes  enacted by  non-charter  cities  without voter
approval. It is not possible to predict the eventual impact of that decision.

      In 1996,  California  voters  approved  Proposition  218. That  initiative
applied the provisions of Proposition 62 to all government  entities,  including
cities  having  charters.  It requires  that all taxes for  general  purposes be
approved by a simple  majority of the popular  vote,  and that taxes for special
purposes must be approved by a two-thirds  majority vote.  Proposition  218 also
limits  the   authority  of  local   governments   to  impose   property-related
assessments,  fees and charges.  It requires that such assessments be limited to
the special benefit  conferred and prohibits their use for general  governmental
services.  The  Proposition  enables  voters to use their  initiative  powers to
reduce or repeal previously-authorized taxes, assessments, fees and charges.

      Effect of other  State Laws on Bond  Obligations.  Some of the  tax-exempt
securities  that the Fund can invest in may be  obligations  payable solely from
the revenues of a specific institution or secured by specific properties.  These
are subject to  provisions  of California  law that could  adversely  affect the
holders of such obligations. For example, the revenues of California health care
institutions may be adversely  affected by State laws, and California law limits
the  remedies  of a  creditor  secured  by a  mortgage  or deed of trust on real
property.   Debt  obligations  payable  solely  from  revenues  of  health  care
institutions  may also be  insured  by the State but no  guarantee  exists  that
adequate  reserve funds will be appropriated  by the State  legislature for such
purpose.

      The Effect of General  Economic  Conditions in the State.  The  California
economy has been  recovering  from a general  economic  recession of a few years
ago. In 1997, the rate of growth in new jobs has been generally high compared to
the rest of the country. The unemployment rate, while relatively higher than the
national  average,  fell to an  average  of 5.9% in 1998,  compared  to over 10%
during the recessionary  period. Many of the new jobs were created in industries
such as computer services,  software design, motion pictures and high technology
manufacturing.  Business  services,  export trade and other  manufacturing  also
experienced  growth.  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  effects  elsewhere,  may  continue  to  adversely  affect the State's
export-related industries and, therefore, the State's rate of economic growth.

      On June 29, 1999, the Governor of California  signed the 1999-2000  Budget
Act.  The Budget Act  estimated  General Fund  revenues  and  transfers of $63.0
billion and contained  expenditures  totaling $63.7 billion. The Budget Act also
contained  expenditures  of $16.1  billion from bond funds.  The  Administration
estimated a budget  reserve  balance at June 30,  2000,  of  approximately  $881
million. Not included in this amount was an additional $300 million which (after
the  Governor's  vetoes) was "set aside" to provide  funds for  employee  salary
increases  (to be  negotiated  in  bargaining  with  employee  unions),  and for
litigation  reserves.  The Budget Act  anticipates  normal  cash flow  borrowing
during the fiscal year.  Continued  State  economic  expansion and large revenue
increases  enabled the Governor and State  legislature  to provide  increases in
spending  programs in the 1999-2000  budget.  These included large  increases in
education and health and human services funding.

      In recent past years the state has  experienced  reductions in the overall
credit ratings assigned to its General  Obligation bonds by several major rating
agencies. In July 1994, the ratings of those bonds were downgraded from Aa to A1
by Moody's,  from A+ to A by Standard & Poor's and from AA to A by Fitch. At the
time, the rating  agencies all cited  uncertainty  about the State's  ability to
balance  its budget by 1996.  In 1996,  noting  improvements  in the  economy in
California  and the state budget,  both Fitch and Standard & Poor's raised their
ratings  of the  State's  General  Obligation  bonds from A to A+, in 1997 Fitch
raised its rating to AA-. In 1998 Moody's raised it's rating to Aa3, and in 1999
Standard & Poor's raised its rating to AA-.

      Special Financial Problems of Local Governments. Some local governments in
California have experienced notable financial difficulties. On December 6, 1994,
Orange County, California,  became the largest municipality in the United States
ever to have filed for  protection  under federal  bankruptcy  laws.  The filing
stemmed from losses of about $1.7 billion in the County's investment pool due to
investments  in high-risk  derivative  securities.  In September  1995 the state
legislature  approved  legislation  that  permitted  Orange  County  to use  for
bankruptcy  recovery  $820  million  in  sales  taxes  over 20 years  that  were
previously  earmarked for highways,  transit and  development.  In June 1996 the
County completed an $880 million bond offering secured by real property owned by
the County. On June 12, 1996, the County emerged from bankruptcy.  On January 7,
1997,  Orange County returned to the bond market with a $136 million bond issue.
In December  1997,  Moody's  raised its ratings on $325 million of Orange County
pension  obligation  bonds to Baa3 from Ba. In  February  1998,  Fitch  assigned
outstanding  Orange County pension  obligation bonds a BBB rating.  In September
1999, Moody's assigned the County an issuer (implied general  obligation) rating
of Aa3 and,  among other  things,  upgraded the ratings on the County's  pension
obligation bonds to A1.

      Los  Angeles  County,   the  nation's  most  populous  county,   has  also
experienced financial difficulties. Between 1992 and 1995 the County's long-term
bonds were  downgraded  three  times.  This  occurred as a result of a number of
factors,  including  severe  operating  deficits  for the  county's  health care
system.  In  addition,  the County was  affected by a long-term  loss of revenue
caused by state  property  tax  shift  initiatives  in 1993  through  1995.  The
County's  improving  financial  condition has been reflected in improved general
obligation  bond  ratings.  In  June  1999,  the Los  Angeles  County  Board  of
Supervisors  approved a budget of  approximately  $15 billion for 1999-2000,  up
from the $13.6  billion  approved  for the previous  fiscal  year.  The County's
financial  condition  will continue to be affected by the large number of County
residents who are dependent on government  services and by a structural  deficit
in its health department.

      Year 2000 Concerns.  In October 1997, the Governor of California issued an
executive order stating that solutions to the Year 2000 problem would be a state
government  priority.  Although the State reports that it is making  substantial
progress  overall  toward  the goal of Year  2000  compliance,  the task is very
complex and will likely  encounter  unexpected  difficulties.  The State has not
predicted  whether all mission  critical system will be ready and tested by late
1999 or what  impact  failure  of any  particular  IT  system(s)  or of  outside
interfaces  with State IT systems might have.  The State has indicated  that all
mission  critical  systems  will have a  contingency  business  plan in place to
mitigate potential system failures.

The State Treasurer's Office has reported that its systems for bond payments are
fully Y2K  compliant.  The State  Controller's  Office has reported  that it has
completed  the  necessary  Y2K  remediation  projects  for the State  fiscal and
accounting  system.  Both offices report they are actively  working with outside
entities with which they interface to ensure they are also compliant.  There can
be no assurance  that the steps taken by state or local  governments or agencies
to address the Year 2000 problem will be sufficient to avoid any adverse  impact
on their  budgets or  operations.  Therefore,  the possible  impact of Year 2000
problems on the debt securities  issued by those  governments and agencies,  and
which may be owned by the Fund, cannot be predicted with any certainty.

Other Investment Techniques and Strategies.  In seeking its objective,  the Fund
may from time to time employ the types of investment  strategies and investments
described below.

      Floating  Rate  and  Variable  Rate  Obligations.   Variable  rate  demand
obligations  have a demand feature that allows the Fund to tender the obligation
to the issuer or a third party prior to its  maturity.  The tender may be at par
value plus accrued interest, according to the terms of the obligations.

      The  interest  rate on a floating  rate  demand  note is based on a stated
prevailing  market rate,  such as a bank's prime rate, the 91-day U.S.  Treasury
Bill rate, or some other standard,  and is adjusted automatically each time such
rate is adjusted. The interest rate on a variable rate demand note is also based
on a stated  prevailing  market rate but is adjusted  automatically at specified
intervals of not less than one year. Generally, the changes in the interest rate
on such  securities  reduce the  fluctuation in their market value.  As interest
rates  decrease  or  increase,   the  potential  for  capital   appreciation  or
depreciation is less than that for fixed-rate  obligations of the same maturity.
The Manager may determine that an unrated  floating rate or variable rate demand
obligation  meets the Fund's  quality  standards  by reason of being backed by a
letter  of credit  or  guarantee  issued  by a bank  that  meets  those  quality
standards.

      Floating rate and variable  rate demand notes that have a stated  maturity
in excess of one year may have  features  that  permit the holder to recover the
principal amount of the underlying security at specified intervals not exceeding
one year and upon no more than 30 days' notice.  The issuer of that type of note
normally has a corresponding  right in its discretion,  after a given period, to
prepay  the  outstanding  principal  amount of the note plus  accrued  interest.
Generally  the issuer  must  provide a specified  number of days'  notice to the
holder.

      Inverse  Floaters and Other Derivative  Investments.  Inverse floaters may
offer relatively high current income,  reflecting the spread between  short-term
and long-term tax exempt  interest  rates.  As long as the municipal yield curve
remains  relatively steep and short term rates remain  relatively low, owners of
inverse  floaters will have the  opportunity  to earn  interest at  above-market
rates because they receive  interest at the higher long-term rates but have paid
for bonds with lower  short-term  rates.  If the yield curve flattens and shifts
upward,  an inverse  floater will lose value more  quickly  than a  conventional
long-term  bond.  The Fund  will  invest  in  inverse  floaters  to seek  higher
tax-exempt  yields than are available from fixed-rate bonds that have comparable
maturities and credit ratings.  In some cases,  the holder of an inverse floater
may have an option to convert the floater to a  fixed-rate  bond,  pursuant to a
"rate-lock" option.

          Some inverse  floaters  have a feature known as an interest rate "cap"
    as part of the terms of the investment.  Investing in inverse  floaters that
    have  interest  rate caps might be part of a  portfolio  strategy  to try to
    maintain a high  current  yield for the Fund when the Fund has  invested  in
    inverse  floaters  that expose the Fund to the risk of  short-term  interest
    rate  fluctuations.  "Embedded"  caps can be used to hedge a portion  of the
    Fund's  exposure to rising  interest  rates.  When  interest  rates exceed a
    pre-determined rate, the cap generates additional cash flows that offset the
    decline  in  interest  rates  on the  inverse  floater,  and  the  hedge  is
    successful.  However,  the Fund bears the risk that if interest rates do not
    rise  above  the  pre-determined  rate,  the cap  (which  is  purchased  for
    additional  cost) will not  provide  additional  cash flows and will  expire
    worthless.

      Inverse floaters are a form of derivative investment. Certain derivatives,
such as options,  futures, indexed securities and entering into swap agreements,
can be used to  increase or decrease  the Fund's  exposure to changing  security
prices,  interest  rates or other  factors that affect the value of  securities.
However,  these  techniques  could result in losses to the Fund,  if the Manager
judges  market  conditions  incorrectly  or  employs  a  strategy  that does not
correlate  well with the Fund's other  investments.  These  techniques can cause
losses if the counterparty does not perform its promises.  An additional risk of
investing in municipal securities that are derivative  investments is that their
market value could be expected to vary to a much greater  extent than the market
value of  municipal  securities  that are not  derivative  investments  but have
similar credit quality, redemption provisions and maturities.

      When-Issued  and  Delayed  Delivery-Transactions.  The Fund  can  purchase
securities on a "when-issued" basis, and may purchase or sell such securities on
a  "delayed-delivery"  basis.  "When-issued"  or  "delayed-delivery"  refers  to
securities  whose  terms  and  indenture  are  available  and for which a market
exists, but which are not available for immediate delivery.

      When  such  transactions  are  negotiated  the price  (which is  generally
expressed in yield terms) is fixed at the time the commitment is made.  Delivery
and  payment  for the  securities  take  place  at a later  date.  Normally  the
settlement  date is within six months of the  purchase  of  municipal  bonds and
notes.  However,  the Fund may, from time to time, purchase municipal securities
having a settlement  date more than six months and possibly as long as two years
or more after the trade date. The securities are subject to change in value from
market  fluctuation  during the settlement  period. The value at delivery may be
less than the  purchase  price.  For  example,  changes in  interest  rates in a
direction other than that expected by the Manager before  settlement will affect
the value of such securities and may cause loss to the Fund.

      The Fund will engage in when-issued  transactions  in order to secure what
is considered to be an advantageous price and yield at the time of entering into
the  obligation.  When the  Fund  engages  in  when-issued  or  delayed-delivery
transactions,  it relies on the buyer or seller, as the case may be, to complete
the  transaction.  Their  failure  to do so may  cause  the  Fund  to  lose  the
opportunity   to  obtain  the  security  at  a  price  and  yield  it  considers
advantageous.

      When the Fund engages in when-issued and delayed-delivery transactions, it
does so for the purpose of acquiring or selling  securities  consistent with its
investment  objective and policies for its portfolio or for delivery pursuant to
options  contracts it has entered  into,  and not for the purposes of investment
leverage.  Although  the Fund will enter into  when-issued  or  delayed-delivery
purchase  transactions  to  acquire  securities,  the  Fund  may  dispose  of  a
commitment  prior to settlement.  If the Fund chooses to dispose of the right to
acquire a when-issued  security  prior to its  acquisition  or to dispose of its
right to deliver or receive against a forward commitment, it may incur a gain or
loss.
      At the time the Fund makes a commitment  to purchase or sell a security on
a when-issued or forward  commitment  basis,  it records the  transaction on its
books and reflects the value of the security  purchased.  In a sale transaction,
it records the proceeds to be received,  in determining its net asset value. The
Fund will identify to its custodian  bank cash,  U.S.  Government  securities or
other  high  grade  debt  obligations  at least  equal to the value of  purchase
commitments until the Fund pays for the investment.

      When-issued  transactions and forward  commitments can be used by the Fund
as a defensive  technique to hedge against anticipated changes in interest rates
and  prices.  For  instance,  in periods of rising  interest  rates and  falling
prices,  the Fund might sell securities in its portfolio on a forward commitment
basis to attempt to limit its exposure to anticipated falling prices. In periods
of falling  interest  rates and  rising  prices,  the Fund might sell  portfolio
securities  and  purchase the same or similar  securities  on a  when-issued  or
forward commitment basis, to obtain the benefit of currently higher cash yields.

      Zero-Coupon Securities.  The Fund may buy zero-coupon and delayed interest
municipal  securities.  Zero-coupon  securities  do not make  periodic  interest
payments  and are sold at a deep  discount  from  their  face  value.  The buyer
recognizes  a rate of  return  determined  by the  gradual  appreciation  of the
security,  which is redeemed at face value on a specified  maturity  date.  This
discount  depends on the time remaining  until  maturity,  as well as prevailing
interest  rates,  the  liquidity of the  security and the credit  quality of the
issuer.  In the absence of threats to the issuer's credit quality,  the discount
typically decreases as the maturity date approaches. Some zero-coupon securities
are convertible,  in that they are zero-coupon  securities until a predetermined
date, at which time they convert to a security with a specified coupon rate.

      Because zero-coupon  securities pay no interest and compound semi-annually
at the rate fixed at the time of their  issuance,  their value is generally more
volatile  than the value of other  debt  securities.  Their  value may fall more
dramatically than the value of  interest-bearing  securities when interest rates
rise. When prevailing interest rates fall,  zero-coupon  securities tend to rise
more rapidly in value because they have a fixed rate of return.

      The Fund's  investment  in  zero-coupon  securities  may cause the Fund to
recognize income and make  distributions to shareholders  before it receives any
cash payments on the zero-coupon  investment.  To generate cash to satisfy those
distribution  requirements,  the Fund may have to sell portfolio securities that
it  otherwise  might  have  continued  to hold or to use cash  flows  from other
sources such as the sale of Fund shares.

      Puts and  Standby  Commitments.  When the Fund buys a  municipal  security
subject to a standby commitment to repurchase the security, the Fund is entitled
to same-day  settlement from the purchaser.  The Fund receives an exercise price
equal to the amortized cost of the underlying security plus any accrued interest
at the  time of  exercise.  A put  purchased  in  conjunction  with a  municipal
security  enables the Fund to sell the  underlying  security  within a specified
period of time at a fixed exercise price.

      The Fund might purchase a standby  commitment or put separately in cash or
it might  acquire the security  subject to the standby  commitment  or put (at a
price that reflects  that  additional  feature).  The Fund will enter into these
transactions  only with banks and  securities  dealers  that,  in the  Manager's
opinion,  present minimal credit risks.  The Fund's ability to exercise a put or
standby  commitment  will depend on the ability of the bank or dealer to pay for
the  securities if the put or standby  commitment  is exercised.  If the bank or
dealer should default on its  obligation,  the Fund might not be able to recover
all or a  portion  of any  loss  sustained  from  having  to sell  the  security
elsewhere.

      Puts and  standby  commitments  are not  transferable  by the  Fund.  They
terminate if the Fund sells the underlying  security to a third party.  The Fund
intends to enter into these  arrangements  to  facilitate  portfolio  liquidity,
although  such  arrangements  might  enable  the  Fund to sell a  security  at a
pre-arranged  price that may be higher than the  prevailing  market price at the
time the put or standby commitment is exercised. However, the Fund might refrain
from  exercising  a  put  or  standby   commitment  if  the  exercise  price  is
significantly  higher than the prevailing market price, to avoid imposing a loss
on the seller that could jeopardize the Fund's business  relationships  with the
seller.

      A put or standby commitment increases the cost of the security and reduces
the yield otherwise  available from the security.  Any consideration paid by the
Fund for the put or standby  commitment will be reflected on the Fund's books as
unrealized  depreciation  while the put or  standby  commitment  is held,  and a
realized  gain or loss  when the put or  commitment  is  exercised  or  expires.
Interest income received by the Fund from municipal  securities  subject to puts
or stand-by  commitments may not qualify as tax exempt in its hands if the terms
of the put or  stand-by  commitment  cause the Fund not to be treated as the tax
owner of the underlying municipal securities.

      Repurchase  Agreements.   The  Fund  may  acquire  securities  subject  to
repurchase  agreements.  It may do so for liquidity purposes to meet anticipated
redemptions of Fund shares, or pending the investment of the proceeds from sales
of Fund  shares,  or  pending  the  settlement  of  portfolio  securities.  In a
repurchase  transaction,  the Fund acquires a security from, and  simultaneously
resells it to an approved vendor for delivery on an agreed upon future date. The
resale  price  exceeds  the  purchase  price  by  an  amount  that  reflects  an
agreed-upon  interest rate  effective for the period during which the repurchase
agreement is in effect.  Approved vendors include U.S.  commercial  banks,  U.S.
branches of foreign banks or broker-dealers  that have been designated a primary
dealer in government  securities,  which meet the credit requirements set by the
Fund's Board of Trustees from time to time.

      The majority of these  transactions run from day to day. Delivery pursuant
to  resale  typically  will  occur  within  one to five  days  of the  purchase.
Repurchase  agreements  having a maturity  beyond  seven days are subject to the
Fund's limits on holding illiquid  investments.  There is no limit on the amount
of the Fund's net assets that may be subject to  repurchase  agreements of seven
days or less.
      Repurchase  agreements,  considered  "loans" under the Investment  Company
Act,  are  collateralized  by the  underlying  security.  The Fund's  repurchase
agreements  require  that at all times  while  the  repurchase  agreement  is in
effect,  the  collateral's  value must equal or exceed the  repurchase  price to
fully  collateralize the repayment  obligation.  Additionally,  the Manager will
impose  creditworthiness  requirements to confirm that the vendor is financially
sound and will  continuously  monitor the collateral's  value.  However,  if the
vendor fails to pay the resale price on the  delivery  date,  the Fund may incur
costs in disposing of the collateral  and may experience  losses if there is any
delay  in  its  ability  to  do  so.  The  Manager  will  monitor  the  vendor's
creditworthiness  to  confirm  that the  vendor  is  financially  sound and will
continuously monitor the collateral's value.

      Illiquid  Securities.  The Fund has percentage  limitations  that apply to
purchases of illiquid  securities,  as stated in the Prospectus.  As a matter of
fundamental  policy, the Fund cannot purchase any securities that are subject to
restrictions on resale.

      Loans of  Portfolio  Securities.  To attempt to raise income or raise cash
for liquidity purposes,  the Fund may lend its portfolio  securities to brokers,
dealers and other  financial  institutions.  These loans are limited to not more
than 25% of the value of the Fund's total assets.  There are risks in connection
with  securities  lending.  The  Fund  might  experience  a delay  in  receiving
additional  collateral  to secure a loan,  or a delay in  recovery of the loaned
securities.  The Fund presently does not intend to engage in loans of securities
that will exceed 5% of the value of the Fund's  total assets in the coming year.
Income from securities loans does not constitute  exempt-interest income for the
purpose of paying tax-exempt dividends.

      The Fund must receive  collateral  for a loan.  Under  current  applicable
regulatory  requirements (which are subject to change), on each business day the
loan collateral must be at least equal to the value of the loaned securities. It
must consist of cash, bank letters of credit,  securities of the U.S. Government
or its agencies or  instrumentalities,  or other cash  equivalents  in which the
Fund is permitted to invest.  To be acceptable as collateral,  letters of credit
must obligate a bank to pay amounts demanded by the Fund if the demand meets the
terms of the letter. The terms of the letter of credit and the issuing bank both
must be satisfactory to the Fund.


      When it lends securities, the Fund receives amounts equal to the dividends
or  interest  on the  loaned  securities,  It also  receives  one or more of (a)
negotiated  loan fees, (b) interest on securities  used as  collateral,  and (c)
interest on  short-term  debt  securities  purchased  with the loan  collateral.
Either  type of  interest  may be  shared  with the  borrower.  The Fund may pay
reasonable  finder's,  administrative  or other  fees in  connection  with these
loans.  The terms of the  Fund's  loans  must meet  applicable  tests  under the
Internal Revenue Code and must permit the Fund to reacquire loaned securities on
five days' notice or in time to vote on any important matter.

     Hedging. The Fund may use hedging to attempt to protect against declines in
the market value of its portfolio, to permit the Fund to retain unrealized gains
in the value of portfolio  securities  that have  appreciated,  or to facilitate
selling securities for investment reasons. To do so, the Fund may: sell interest
rate  futures or  municipal  bond  index  futures,  buy puts on such  futures or
securities,  or write  covered  calls on  securities,  interest  rate futures or
municipal  bond  index  futures.  Covered  calls  may  also be  written  on debt
securities to attempt to increase the Fund's  income,  but that income would not
be tax-exempt.  Therefore it is unlikely that the Fund would write covered calls
for that purpose.

      The  Fund may  also  use  hedging  to  establish  a  position  in the debt
securities  market as a temporary  substitute  for  purchasing  individual  debt
securities. In that case the Fund will normally seek to purchase the securities,
and then terminate  that hedging  position.  For this type of hedging,  the Fund
may:
            buy interest rate futures or municipal  bond index  futures,  or buy
            calls on such futures or on securities.

      The Fund is not  obligated to use hedging  instruments,  even though it is
permitted  to use them in the  Manager's  discretion,  as described  below.  The
Fund's  strategy  of  hedging  with  futures  and  options  on  futures  will be
incidental to the Fund's  investment  activities in the underlying  cash market.
The particular  hedging  instruments the Fund can use are described  below.  The
Fund may employ new hedging  instruments and strategies when they are developed,
if those investment methods are consistent with the Fund's investment  objective
and are permissible under applicable regulations governing the Fund.

      Futures.  The Fund may buy and sell  futures  contracts  relating  to debt
securities (these are called "interest rate futures") and municipal bond indices
(these are referred to as "municipal bond index futures").

      An interest rate future obligates the seller to deliver (and the purchaser
to  take)  cash or a  specific  type of debt  security  to  settle  the  futures
transaction.  Either party could also enter into an offsetting contract to close
out the futures position.

      A "municipal bond index" assigns relative values to the municipal bonds in
the index, and is used as the basis for trading long-term municipal bond futures
contracts.  Municipal  bond index  futures are similar to interest  rate futures
except that  settlement is made only in cash. The obligation  under the contract
may also be satisfied by entering into an offsetting  contract.  The  strategies
which the Fund  employs in using  municipal  bond index  futures  are similar to
those with regard to interest rate futures.

      Upon  entering  into a futures  transaction,  the Fund will be required to
deposit an initial margin payment in cash or U.S. Government securities with the
futures commission merchant (the "futures broker"). Initial margin payments will
be deposited  with the Fund's  custodian  bank in an account  registered  in the
futures  broker's  name.  However,  the  futures  broker can gain access to that
account  only under  certain  specified  conditions.  As the future is marked to
market (that is, its value on the Fund's books is changed) to reflect changes in
its market value,  subsequent margin payments,  called variation margin, will be
paid to or by the futures broker daily.

      At any time prior to the  expiration of the future,  the Fund may elect to
close out its  position  by taking an  opposite  position  at which time a final
determination  of variation margin is made and additional cash is required to be
paid by or released to the Fund.  Any gain or loss is then  realized by the Fund
on the future for tax  purposes.  Although  Interest Rate Futures by their terms
call for  settlement  by the  delivery  of debt  securities,  in most  cases the
obligation  is fulfilled  without such  delivery by entering  into an offsetting
transaction.  All futures  transactions  are effected  through a clearing  house
associated with the exchange on which the contracts are traded.

      The Fund may  concurrently  buy and sell  futures  contracts in a strategy
anticipating  that the future the Fund  purchased  will perform  better than the
future the Fund sold. For example, the Fund might buy municipal bond futures and
concurrently  sell U.S.  Treasury Bond futures (a type of interest rate future).
The Fund would benefit if municipal bonds  outperform  U.S.  Treasury Bonds on a
duration-adjusted basis.

      Duration is a volatility  measure  that refers to the expected  percentage
change in the value of a bond resulting from a change in general  interest rates
(measured  by each 1%  change  in the rates on U.S.  Treasury  securities).  For
example,  if a bond has an effective  duration of three years,  a 1% increase in
general  interest  rates  would be  expected  to cause  the value of the bond to
decline about 3%. There are risks that this type of futures strategy will not be
successful.  U.S.  Treasury  bonds might perform  better on a  duration-adjusted
basis than municipal  bonds,  and the assumptions  about duration that were used
might be incorrect (in this case,  the duration of municipal  bonds  relative to
U.S. Treasury Bonds might have been greater than anticipated).

     Put and  Call  Options.  The Fund  may buy and  sell  certain  kinds of put
options (puts) and call options (calls). These strategies are described below.

     Writing  Covered  Call  Options.  The Fund may write  (that is,  sell) call
options. The Fund's call writing is subject to a number of restrictions:

(1)       After  the Fund  writes a call,  not more  than 25% of the  Fund's
          total assets may be subject to calls.
(2)      Calls the Fund  sells  must be listed on a  securities  or  commodities
         exchange or quoted on NASDAQ,  the  automated  quotation  system of The
         Nasdaq Stock Market, Inc. or traded in the over-the-counter market.
(3)      Each call the Fund writes must be  "covered"  while it is  outstanding.
         That  means  the Fund  must own the  investment  on which  the call was
         written.
(4)      The Fund may write calls on futures  contracts  that it owns, but these
         calls must be covered by  securities  or other  liquid  assets that the
         Fund owns and segregates to enable it to satisfy its obligations if the
         call is exercised.

      When  the  Fund  writes  a  call  on  a  security,  it  receives  cash  (a
premium).The  Fund agrees to sell the underlying  investment to a purchaser of a
corresponding  call on the  same  security  during  the call  period  at a fixed
exercise price  regardless of market price changes  during the call period.  The
call period is usually not more than nine months.  The exercise price may differ
from the market price of the underlying security. The Fund has retained the risk
of loss that the price of the  underlying  security may decline  during the call
period. That risk may be offset to some extent by the premium the Fund receives.
If the value of the investment  does not rise above the call price, it is likely
that the call will lapse  without being  exercised.  In that case the Fund would
keep the cash premium and the investment.

      The Fund's  custodian  bank,  or a  securities  depository  acting for the
custodian  bank,  will act as the Fund's escrow agent through the  facilities of
the Options  Clearing  Corporation  ("OCC"),  as to the investments on which the
Fund has written calls traded on  exchanges,  or as to other  acceptable  escrow
securities.  In that way, no margin will be required for such transactions.  OCC
will release the  securities  on the  expiration of the calls or upon the Fund's
entering into a closing purchase transaction.

      When the Fund writes an  over-the-counter  ("OTC")  option,  it will enter
into an arrangement with a primary U.S. Government  securities dealer which will
establish  a formula  price at which the Fund  will have the  absolute  right to
repurchase  that OTC option.  The formula  price would  generally  be based on a
multiple of the premium  received  for the option,  plus the amount by which the
option is exercisable  below the market price of the  underlying  security (that
is, the option is  "in-the-money").  When the Fund writes an OTC option, it will
treat as illiquid (for purposes of its  restriction on illiquid  securities) the
mark-to-market  value of any OTC option held by it, unless the option is subject
to a buy-back  agreement by the executing  broker.  The  Securities and Exchange
Commission  is  evaluating  whether  OTC  options  should be  considered  liquid
securities.  The procedure  described  above could be affected by the outcome of
that evaluation.

      To  terminate  its  obligation  on a call it has  written,  the  Fund  may
purchase a corresponding call in a "closing purchase transaction." The Fund will
then realize a profit or loss,  depending  upon whether the net of the amount of
the option transaction costs and the premium received on the call the Fund wrote
was more or less than the price of the call the Fund  purchased to close out the
transaction.  A profit  may also be  realized  if the call  lapses  unexercised,
because the Fund retains the underlying investment and the premium received. Any
such profits are considered  short-term  capital gains for federal tax purposes,
as are premiums on lapsed calls.  When  distributed by the Fund they are taxable
as ordinary income.

      The Fund may also write  calls on  futures  contracts  without  owning the
futures contract or securities  deliverable under the contract. To do so, at the
time the call is written,  the Fund must cover the call by segregating in escrow
an equivalent dollar value of liquid assets. The Fund will segregate  additional
liquid  assets if the  value of the  escrowed  assets  drops  below  100% of the
current  value  of  the  future.  Because  of  this  escrow  requirement,  in no
circumstances  would the Fund's receipt of an exercise  notice as to that future
put the Fund in a "short" futures position.

      Purchasing  Calls and Puts.  The Fund may buy  calls  only on  securities,
broadly-based municipal bond indices,  municipal bond index futures and interest
rate  futures.  It may also buy  calls to close  out a call it has  written,  as
discussed  above.  Calls  the  Fund  buys  must be  listed  on a  securities  or
commodities  exchange,  or quoted on NASDAQ,  or traded in the  over-the-counter
market.  A call or put option may not be purchased  if the purchase  would cause
the  value of all the  Fund's  put and call  options  to  exceed 5% of its total
assets.

      When  the  Fund  purchases  a  call  (other  than  in a  closing  purchase
transaction),  it pays a premium. For calls on securities that the Fund buys, it
has the right to buy the underlying  investment from a seller of a corresponding
call on the same  investment  during the call period at a fixed exercise  price.
The Fund  benefits  only if (1) the call is sold at a profit  or (2) the call is
exercised when the market price of the underlying investment is above the sum of
the exercise price plus the transaction  costs and premium paid for the call. If
the call is not either  exercised or sold (whether or not at a profit),  it will
become  worthless at its  expiration  date.  In that case the Fund will lose its
premium payment and the right to purchase the underlying investment.

      Calls on municipal bond indices,  interest rate futures and municipal bond
index  futures  are settled in cash rather  than by  delivering  the  underlying
investment.  Gain or loss depends on changes in the  securities  included in the
index in question  (and thus on price  movements in the debt  securities  market
generally) rather than on changes in price of the individual futures contract.

      The Fund may buy only those puts that relate to  securities  that the Fund
owns,  broadly-based  municipal  bond indices,  municipal  bond index futures or
interest rate futures  (whether or not the Fund owns the futures).  The Fund may
not sell puts other than puts it has previously purchased.

      When the Fund  purchases a put,  it pays a premium.  The Fund then has the
right to sell the underlying  investment to a seller of a  corresponding  put on
the same  investment  during the put period at a fixed exercise  price.  Puts on
municipal  bond  indices are settled in cash.  Buying a put on a debt  security,
interest rate future or municipal  bond index future the Fund owns enables it to
protect  itself  during  the put  period  against a decline  in the value of the
underlying  investment  below the  exercise  price.  If the market  price of the
underlying  investment  is equal to or above the exercise  price and as a result
the put is not  exercised  or  resold,  the put  will  become  worthless  at its
expiration  date.  In that case the Fund will lose its  premium  payment and the
right to sell the underlying  investment.  A put may be sold prior to expiration
(whether or not at a profit).

      Risks of Hedging with Options and Futures.  The use of hedging instruments
requires  special  skills  and  knowledge  of  investment  techniques  that  are
different than what is required for normal portfolio management.  If the Manager
uses a  hedging  instrument  at the  wrong  time  or  judges  market  conditions
incorrectly, hedging strategies may reduce the Fund's returns.

          The Fund's option  activities  may affect its portfolio  turnover rate
    and  brokerage  commissions.  The exercise of calls  written by the Fund may
    cause the Fund to sell related  portfolio  securities,  thus  increasing its
    turnover rate. The exercise by the Fund of puts on securities will cause the
    sale of underlying investments,  increasing portfolio turnover. Although the
    decision  whether to  exercise a put it holds is within the Fund's  control,
    holding  a put  might  cause the Fund to sell the  related  investments  for
    reasons that would not exist in the absence of the put.

      The Fund may pay a brokerage  commission  each time it buys a call or put,
sells a call, or buys or sells an underlying  investment in connection  with the
exercise of a call or put. Such  commissions  may be higher on a relative  basis
than  the  commissions   for  direct   purchases  or  sales  of  the  underlying
investments. Premiums paid for options are small in relation to the market value
of the underlying  investments.  Consequently,  put and call options offer large
amounts of leverage.  The leverage offered by trading in options could result in
the Fund's net asset value being more  sensitive  to changes in the value of the
underlying investment.

      If a covered call written by the Fund is exercised on an  investment  that
has increased in value,  the Fund will be required to sell the investment at the
call  price.  It will not be able to realize  any profit if the  investment  has
increased in value above the call price.

      There is a risk in using short  hedging by selling  interest  rate futures
and municipal bond index futures or purchasing puts on municipal bond indices or
futures  to  attempt  to  protect  against  declines  in the value of the Fund's
securities.  The risk is that the prices of such futures or the applicable index
will  correlate  imperfectly  with the  behavior  of the cash (that is,  market)
prices of the Fund's securities. It is possible for example, that while the Fund
has used hedging  instruments  in a short hedge,  the market may advance and the
value of debt  securities  held in the Fund's  portfolio  may  decline.  If that
occurred,  the  Fund  would  lose  money  on the  hedging  instruments  and also
experience a decline in value of its debt securities.  However, while this could
occur over a brief  period or to a very small  degree,  over time the value of a
diversified portfolio of debt securities will tend to move in the same direction
as the indices upon which the hedging instruments are based.

      The risk of  imperfect  correlation  increases as the  composition  of the
Fund's portfolio diverges from the securities  included in the applicable index.
To compensate  for the imperfect  correlation  of movements in the price of debt
securities  being hedged and movements in the price of the hedging  instruments,
the Fund may use hedging  instruments in a greater dollar amount than the dollar
amount  of debt  securities  being  hedged.  It  might  do so if the  historical
volatility of the prices of the debt securities being hedged is greater than the
historical volatility of the applicable index.

      The ordinary  spreads  between prices in the cash and futures  markets are
subject to distortions  due to differences in the natures of those markets.  All
participants   in  the  futures  markets  are  subject  to  margin  deposit  and
maintenance   requirements.   Rather  than  meeting  additional  margin  deposit
requirements,  investors  may close out  futures  contracts  through  offsetting
transactions  which could distort the normal  relationship  between the cash and
futures markets. From the point of view of speculators, the deposit requirements
in the  futures  markets  are  less  onerous  than  margin  requirements  in the
securities  markets.  Therefore,  increased  participation by speculators in the
futures markets may cause temporary price distortions.

      The Fund may use  hedging  instruments  to  establish  a  position  in the
municipal  securities  markets as a  temporary  substitute  for the  purchase of
individual  securities  (long  hedging).  It is  possible  that the  market  may
decline.  If the Fund then concludes not to invest in such securities because of
concerns that there may be further market decline or for other reasons, the Fund
will realize a loss on the hedging instruments that is not offset by a reduction
in the purchase price of the securities.

      An  option  position  may be  closed  out only on a market  that  provides
secondary  trading for options of the same series.  There is no assurance that a
liquid  secondary market will exist for a particular  option.  If the Fund could
not effect a closing  purchase  transaction due to a lack of a market,  it would
have to hold the callable investment until the call lapsed or was exercised.

      Interest Rate Swap  Transactions.  In an interest rate swap,  the Fund and
another  party  exchange  their  right to  receive  or their  obligation  to pay
interest on a security.  For example,  they may swap a right to receive floating
rate  payments  for fixed  rate  payments.  The Fund  enters  into swaps only on
securities it owns.  The Fund may not enter into swaps with respect to more than
25% of its total assets.  Also, the Fund will  segregate  liquid assets (such as
cash or U.S.  Government  securities)  to cover any  amounts  it could owe under
swaps that exceed the amounts it is entitled to receive, and it will adjust that
amount daily, as needed. Income from interest rate swaps may be taxable.

      Swap agreements entail both interest rate risk and credit risk. There is a
risk that, based on movements of interest rates in the future, the payments made
by the Fund under a swap agreement will have been greater than those received by
it. Credit risk arises from the possibility that the counterparty  will default.
If the  counterparty  to an interest  rate swap  defaults,  the Fund's loss will
consist of the net amount of contractual interest payments that the Fund has not
yet received. The Manager will monitor the creditworthiness of counterparties to
the Fund's interest rate swap transactions on an ongoing basis.

      The Fund will enter into swap transactions with appropriate counterparties
pursuant to master netting agreements.  A master netting agreement provides that
all swaps done between the Fund and that counterparty under the master agreement
shall be regarded as parts of an integral agreement.  If on any date amounts are
payable under one or more swap transactions, the net amount payable on that date
shall be paid. In addition, the master netting agreement may provide that if one
party  defaults  generally or on one swap,  the  counterparty  may terminate the
swaps with that party.  Under master netting  agreements,  if there is a default
resulting  in a loss to one  party,  that  party's  damages  are  calculated  by
reference to the average cost of a  replacement  swap with respect to each swap.
The  gains  and  losses on all  swaps  are then  netted,  and the  result is the
counterparty's gain or loss on termination. The termination of all swaps and the
netting  of  gains  and  losses  on  termination  is  generally  referred  to as
"aggregation."

      Regulatory Aspects of Hedging Instruments.  When using futures and options
on futures,  the Fund is  required  to operate  within  certain  guidelines  and
restrictions  established  by the  Commodity  Futures  Trading  Commission  (the
"CFTC"). In particular,  the Fund is exempted from registration with the CFTC as
a "commodity  pool operator" if the Fund complies with the  requirements of Rule
4.5 adopted by the CFTC.  That Rule does not limit the  percentage of the Fund's
assets that may be used for futures  margin and related  options  premiums for a
bona fide  hedging  position.  However,  under the Rule the Fund must  limit its
aggregate initial futures margin and related options premiums to no more than 5%
of the Fund's net assets for hedging  strategies  that are not  considered  bona
fide hedging  strategies  under the Rule. Under the Rule, the Fund also must use
short  futures and  options on futures  positions  solely for bona fide  hedging
purposes  within the  meaning  and intent of the  applicable  provisions  of the
Commodity Exchange Act.

      Transactions in options by the Fund are subject to limitations established
by the option exchanges.  The exchanges limit the maximum number of options that
may be  written or held by a single  investor  or group of  investors  acting in
concert.  Those limits apply  regardless  of whether the options were written or
purchased  on the  same  or  different  exchanges,  or are  held  in one or more
accounts  or through  one or more  different  exchanges  or through  one or more
brokers.  Thus,  the  number of  options  that the Fund may write or hold may be
affected  by  options  written  or  held  by  other  entities,  including  other
investment  companies having the same adviser as the Fund (or an adviser that is
an affiliate of the Fund's  adviser).  The exchanges also impose position limits
on futures  transactions.  An exchange  may order the  liquidation  of positions
found to be in violation of those limits and may impose certain other sanctions.

      Under the Investment Company Act, when the Fund purchases an interest rate
future  or  municipal  bond  index  future,  it must  maintain  cash or  readily
marketable short-term debt instruments in an amount equal to the market value of
the investments underlying the future, less the margin deposit applicable to it.
The account must be a segregated account or accounts held by its custodian bank.

     Temporary Defensive Investments.  The securities the Fund may invest in for
temporary  defensive  purposes  include  the  following:   short-term  municipal
securities;  obligations  issued or  guaranteed  by the U.S.  Government  or its
agencies or instrumentalities;  corporate debt securities rated within the three
highest grades by a nationally recognized rating agency;  commercial paper rated
"A-1" by S&P, or a comparable  rating by another  nationally  recognized  rating
agency;  and certificates of deposit of domestic banks with assets of $1 billion
or more.

      Portfolio  Turnover.  A change  in the  securities  held by the Fund  from
buying and selling  investments  is known as  "portfolio  turnover."  Short-term
trading  increases the rate of portfolio  turnover and could increase the Fund's
transaction  costs.  However,  the Fund ordinarily incurs little or no brokerage
expense because most of the Fund's  portfolio  transactions are principal trades
that do not require payment of brokerage commissions.

      The Fund  ordinarily  does not  trade  securities  to  achieve  short-term
capital gains, because they would not be tax-exempt income. To a limited degree,
the Fund may  engage in  short-term  trading to  attempt  to take  advantage  of
short-term  market  variations.  It may  also do so to  dispose  of a  portfolio
security prior to its maturity. That might be done if, on the basis of a revised
credit evaluation of the issuer or other considerations,  the Fund believes such
disposition advisable or it needs to generate cash to satisfy requests to redeem
Fund shares.  In those cases, the Fund may realize a capital gain or loss on its
investments.  The Fund's annual portfolio turnover rate normally is not expected
to exceed 100%.

      Taxable  Investments.  While  the Fund can  invest  up to 20% of its total
assets in investments  that generate income subject to income taxes, it does not
anticipate  investing  substantial  amounts of its assets in taxable investments
under normal market  conditions or as part of its normal trading  strategies and
policies. To the extent it invests in taxable securities,  the Fund would not be
able to meet its objective of providing  tax exempt income to its  shareholders.
Taxable  investments  include,  for  example,  hedging  instruments,  repurchase
agreements,  and the types of securities  it would buy for  temporary  defensive
purposes.

Investment Restrictions

      What Are "Fundamental  Policies?"  Fundamental policies are those policies
that the Fund has adopted to govern its investments  that can be changed only by
the vote of a "majority" of the Fund's outstanding voting securities.  Under the
Investment  Company Act,  such a  "majority"  vote is defined as the vote of the
holders of the lesser of:
      67% or more of the shares present or represented by proxy at a shareholder
    meeting,  if the  holders  of more than 50% of the  outstanding  shares  are
    present or represented by proxy, or
            more than 50% of the outstanding shares.

      The Fund's investment  objective is a fundamental  policy.  Other policies
described in the  Prospectus  or this  Statement of Additional  Information  are
"fundamental"  only if they are identified as such. The Fund's Board of Trustees
can change  non-fundamental  policies  without  shareholder  approval.  However,
significant  changes to investment  policies will be described in supplements or
updates to the  Prospectus  or this  Statement  of  Additional  Information,  as
appropriate.  The Fund's most significant  investment  policies are described in
the Prospectus.

          Does the Fund Have  Additional  Fundamental  Policies?  The  following
          investment restrictions are fundamental policies of the Fund: The Fund
          cannot invest in securities or other  investments other than municipal
          securities,  the temporary  investments  described in its  Prospectus,
          repurchase  agreements,  covered  calls,  private  activity  municipal
          securities  and hedging  instruments  described in "About the Fund" in
          the Prospectus or this Statement of Additional Information.

          The Fund cannot make loans.  However,  repurchase  agreements  and the
          purchase  of debt  securities  in  accordance  with the  Fund's  other
          investment policies and restrictions are permitted.  The Fund may also
          lend its  portfolio  securities  as  described  in "Loans of Portfolio
          Securities."

          The Fund  cannot  borrow  money in  excess  of 10% of the value of its
          total assets. It cannot buy any additional investments when borrowings
          exceed 5% of its  assets.  The Fund may  borrow  only from  banks as a
          temporary measure for extraordinary or emergency purposes, and not for
          the purpose of leveraging its investments.

          The Fund cannot pledge,  mortgage or otherwise  encumber,  transfer or
          assign  its  assets  to secure a debt.  However,  the use of escrow or
          other collateral  arrangements in connection with hedging  instruments
          is permitted.

          The Fund cannot  concentrate  its  investments to the extent of 25% of
          its total assets in any industry.  However,  there is no limitation as
          to the Fund's  investments  in municipal  securities  in general or in
          California municipal securities,  or in obligations issued by the U.S.
          Government and its agencies or instrumentalities.

          The Fund cannot  invest in real  estate.  This  restriction  shall not
          prevent  the Fund from  investing  in  municipal  securities  or other
          permitted  securities  that are secured by real estate or interests in
          real estate.

          The Fund cannot purchase  securities other than hedging instruments on
          margin.  However, the Fund may obtain such short-term credits that may
          be necessary for the  clearance of purchases and sales of  securities.
          The Fund cannot sell securities short.

          The Fund cannot underwrite securities or invest in securities that are
          subject to restrictions on resale.

          The Fund cannot invest in or hold securities of any issuer if officers
          and Trustees of the Fund or the Manager individually  beneficially own
          more than 1/2 of 1% of the  securities of that issuer and together own
          more than 5% of the securities of that issuer.

          The Fund cannot invest in securities of any other investment  company,
          except in connection with a merger with another investment company.

          The Fund cannot buy or sell futures contracts other than interest rate
          futures and municipal bond index futures.

      The Fund  currently  has an operating  policy  (which is not a fundamental
policy but will not be changed without the approval of a shareholder  vote) that
prohibits the Fund from issuing senior securities.  However, the policy does not
prohibit  certain  activities  that are permitted by the Fund's other  policies,
including  borrowing  money for  emergency  purposes as  permitted  by its other
investment policies and applicable  regulations,  entering into delayed-delivery
and when-issued arrangements for portfolio securities transactions, and entering
into contracts to buy or sell derivatives, hedging instruments, options, futures
and the related margin,  collateral or escrow  arrangements  permitted under its
other investment policies.

      Unless the Prospectus or Statement of Additional Information states that a
percentage  restriction applies on an ongoing basis, it applies only at the time
the Fund makes an investment.  In that case the Fund need not sell securities to
meet  the  percentage  limits  if the  value  of  the  investment  increases  in
proportion to the size of the Fund.

Non-Diversification of the Fund's Investments.  The Fund is "non-diversified" as
defined  in  the  Investment  Company  Act.  Funds  that  are  diversified  have
restrictions against investing too much of their assets in the securities of any
one  "issuer."  That means  that the Fund can  invest  more of its assets in the
securities of a single issuer than a fund that is diversified.

      Being  non-diversified  poses additional  investment risks, because if the
Fund  invests  more of its assets in fewer  issuers,  the value of its shares is
subject to greater  fluctuations  from adverse  conditions  affecting any one of
those issuers. However, the Fund does limit its investments in the securities of
any one issuer to qualify for tax purposes as a "regulated  investment  company"
under the Internal Revenue Code. By qualifying,  it does not have to pay federal
income taxes if more than 90% of its earnings are  distributed to  shareholders.
To qualify, the Fund must meet a number of conditions.  First, not more than 25%
of the market value of the Fund's total assets may be invested in the securities
of a single issuer. Second, with respect to 50% of the market value of its total
assets,  (1) no more  than 5% of the  market  value of its total  assets  may be
invested in the  securities  of a single  issuer,  and (2) the Fund must not own
more than 10% of the outstanding voting securities of a single issuer.

      The  identification  of the issuer of a municipal  security depends on the
terms and conditions of the security. When the assets and revenues of an agency,
authority,  instrumentality  or other  political  subdivision  are separate from
those of the  government  creating  it and the  security  is backed  only by the
assets and revenues of the subdivision,  agency,  authority or  instrumentality,
the latter would be deemed to be the sole issuer.  Similarly,  if an  industrial
development   bond  is  backed   only  by  the  assets  and   revenues   of  the
non-governmental  user,  then that user  would be deemed to be the sole  issuer.
However,  if in  either  case  the  creating  government  or some  other  entity
guarantees a security, the guarantee would be considered a separate security and
would be treated as an issue of such government or other entity.

Applying the Restriction Against  Concentration.  To implement its policy not to
concentrate its investments,  the Fund has adopted the industry  classifications
set forth in  Appendix B to this  Statement  of  Additional  Information.  Those
industry classifications are not a fundamental policy.
      In implementing the Fund's policy not to concentrate its investments,  the
Manager  will  consider  a  non-governmental  user  of  facilities  financed  by
industrial  development  bonds as being in a particular  industry.  That is done
even  though  the bonds are  municipal  securities,  as to which the Fund has no
concentration  limitation.   Although  this  application  of  the  concentration
restriction  is not a  fundamental  policy of the Fund,  it will not be  changed
without shareholder approval.

            How the Fund Is Managed

Organization  and  History.  The  Fund is an  open-end,  diversified  management
investment  company with an unlimited number of authorized  shares of beneficial
interest. The Fund was organized as a Massachusetts business trust in July 1988.

      The Fund is  governed by a Board of  Trustees,  which is  responsible  for
protecting the interests of shareholders  under  Massachusetts law. The Trustees
meet periodically  throughout the year to oversee the Fund's activities,  review
its performance,  and review the actions of the Manager.  Although the Fund will
not normally hold annual meetings of its  shareholders,  it may hold shareholder
meetings from time to time on important matters, and shareholders have the right
to call a meeting to remove a Trustee or to take other  action  described in the
Fund's Declaration of Trust.

      Classes  of  Shares.  The  Board  of  Trustees  has  the  power,   without
shareholder  approval,  to divide  unissued  shares of the Fund into two or more
classes.  The Board has done so,  and the Fund  currently  has three  classes of
shares,  Class A, Class B and Class C. All classes invest in the same investment
portfolio.  Shares  are  freely  transferable.   Each  share  has  one  vote  at
shareholder  meetings,  with fractional shares voting  proportionally on matters
submitted to the vote of shareholders. Each class of shares:

      ohas its own dividends and distributions,
      opays certain expenses which may be different for the different classes,
      omay have a different net asset value,
    omay have  separate  voting  rights on matters in which the interests of one
class are different from the interests of another class, and
      ovotes as a class on matters that affect that class alone.

      Meetings of Shareholders.  As a Massachusetts  business trust, the Fund is
not  required to hold,  and does not plan to hold,  regular  annual  meetings of
shareholders.  The  Fund  will  hold  meetings  when  required  to do so by  the
Investment  Company  Act or  other  applicable  law.  It will  also do so when a
shareholder  meeting is called by the  Trustees  or upon  proper  request of the
shareholders.

      Shareholders  have the right,  upon the  declaration in writing or vote of
two-thirds  of the  outstanding  shares of the Fund,  to remove a  Trustee.  The
Trustees will call a meeting of shareholders to vote on the removal of a Trustee
upon the written request of the record holders of 10% of its outstanding shares.
If the  Trustees  receive a request from at least 10  shareholders  stating that
they wish to communicate with other  shareholders to request a meeting to remove
a Trustee,  the  Trustees  will then  either  make the Fund's  shareholder  list
available  to  the  applicants  or  mail  their   communication   to  all  other
shareholders at the applicants'  expense.  The  shareholders  making the request
must have been  shareholders for at least six months and must hold shares of the
Fund  valued  at  $25,000  or more or  constituting  at least  1% of the  Fund's
outstanding  shares,  whichever is less. The Trustees may also take other action
as permitted by the Investment Company Act.

          Shareholder  and Trustee  Liability.  The Fund's  Declaration of Trust
    contains an express  disclaimer of shareholder or Trustee  liability for the
    Fund's  obligations.  It also provides for indemnification and reimbursement
    of expenses out of the Fund's property for any  shareholder  held personally
    liable for its  obligations.  The Declaration of Trust also states that upon
    request,  the Fund  shall  assume the  defense  of any claim made  against a
    shareholder  for any act or  obligation  of the Fund and shall  satisfy  any
    judgment  on that  claim.  Massachusetts  law  permits  a  shareholder  of a
    business  trust  (such  as the  Fund)  to be  held  personally  liable  as a
    "partner"  under  certain  circumstances.  However,  the  risk  that  a Fund
    shareholder  will incur financial loss from being held liable as a "partner"
    of the Fund is limited to the relatively  remote  circumstances in which the
    Fund would be unable to meet its obligations.

      The Fund's  contractual  arrangements state that any person doing business
with the Fund (and each shareholder of the Fund) agrees under its Declaration of
Trust to look solely to the assets of the Fund for  satisfaction of any claim or
demand that may arise out of any dealings with the Fund.  The contracts  further
state that the Trustees shall have no personal  liability to any such person, to
the extent permitted by law.

Trustees  and Officers of the Fund.  The Fund's  Trustees and officers and their
principal  occupations and business affiliations and occupations during the past
five years are listed  below.  Trustees  denoted  with an asterisk (*) below are
deemed to be "interested  persons" of the Fund under the Investment Company Act.
All of the Trustees are Trustees or Directors of the  following  New  York-based
Oppenheimer funds1:

Oppenheimer California Municipal Fund         Oppenheimer Large Cap Growth Fund
Oppenheimer Capital Appreciation Fund        Oppenheimer Money Market Fund, Inc.
Oppenheimer Capital Preservation Fund       Oppenheimer Multiple Strategies Fund
Oppenheimer Developing Markets Fund        Oppenheimer Multi-Sector Income Trust
Oppenheimer Discovery Fund               Oppenheimer Multi-State Municipal Trust
Oppenheimer Enterprise Fund                   Oppenheimer Municipal Bond Fund
Oppenheimer Europe Fund                      Oppenheimer New York Municipal Fund
Oppenheimer Global Fund                       Oppenheimer Series Fund, Inc.
Oppenheimer Global Growth & Income Fund       Oppenheimer U.S. Government Trust
Oppenheimer Gold & Special Minerals Fund      Oppenheimer Trinity Core Fund
Oppenheimer Growth Fund                       Oppenheimer Trinity Growth Fund
Oppenheimer International Growth Fund         Oppenheimer Trinity Value Fund
Oppenheimer International Small Company Fund  Oppenheimer World Bond Fund

      Ms. Macaskill and Messrs. Spiro, Donohue,  Wixted, Zack, Bishop and Farrar
respectively  hold the same  offices with the other New  York-based  Oppenheimer
funds as with the Fund. As of October 15, 1999, the Trustees and officers of the
Fund as a group  owned of record or  beneficially  less than 1% of each class of
shares of the Fund. The foregoing statement does not reflect ownership of shares
of the Fund held of record by an  employee  benefit  plan for  employees  of the
Manager, other than the shares beneficially owned under the plan by the officers
of the Fund listed above.  Ms.  Macaskill  and Mr.  Donohue are trustees of that
plan.

1 Ms. Macaskill is not a Director of Oppenheimer Money Market Fund, Inc.

Leon Levy, Chairman of the Board of Trustees, Age: 74
280 Park Avenue, New York, NY 10017
General Partner of Odyssey Partners, L.P. (investment  partnership) (since 1982)
and Chairman of Avatar Holdings, Inc. (real estate development).

Robert G. Galli, Trustee, Age: 66
                       19750 Beach Road, Jupiter, FL 33469
A Trustee or Director of other Oppenheimer funds. Formerly he held the following
positions: Vice Chairman of the Manager, OppenheimerFunds,  Inc. (October 1995 -
December 1997); Executive Vice President of the Manager (December 1977 - October
1995);  Executive Vice  President and a director  (April 1986 - October 1995) of
HarbourView Asset Management  Corporation,  an investment  advisor subsidiary of
the Manager.

Phillip A. Griffiths, Trustee, Age: 61
97 Olden Lane, Princeton, N. J. 08540
The Director of the Institute for Advanced Study,  Princeton,  N.J. (since 1991)
and a member of the  National  Academy  of  Sciences  (since  1979);  formerly a
director of Bankers Trust  Corporation  (1994 through June,  1999),  Provost and
Professor  of  Mathematics  at Duke  University  (1983 - 1991),  a  director  of
Research  Triangle  Institute,  Raleigh,  N.C. (1983 - 1991), and a Professor of
Mathematics at Harvard University (1972 - 1983).

Benjamin Lipstein, Trustee, Age: 76
591 Breezy Hill Road, Hillsdale, N.Y. 12529
Professor   Emeritus   of   Marketing,   Stern   Graduate   School  of  Business
Administration, New York University.

Bridget A. Macaskill, President and Trustee, Age: 51
Two World Trade Center, New York, New York 10048-0203
President (since June 1991),  Chief Executive Officer (since September 1995) and
a Director (since  December 1994) of the Manager;  President and director (since
June 1991) of HarbourView Asset Management  Corporation,  an investment  adviser
subsidiary of the Manager Chairman and a director of Shareholder Services,  Inc.
(since August 1994) and Shareholder  Financial  Services,  Inc. (since September
1995),  transfer agent  subsidiaries of the Manager;  President (since September
1995) and a director (since October 1990) of Oppenheimer  Acquisition Corp., the
Manager's  parent  holding  company;  President  (since  September  1995)  and a
director  (since  November 1989) of Oppenheimer  Partnership  Holdings,  Inc., a
holding company  subsidiary of the Manager; a director of Oppenheimer Real Asset
Management,  Inc.  (since July 1996);  President and a director  (since  October
1997) of  OppenheimerFunds  International  Ltd.,  an  offshore  fund  management
subsidiary of the Manager and of Oppenheimer Millennium Funds plc; President and
a director of other Oppenheimer funds; a director of Prudential  Corporation plc
(a U.K. financial service company).

Elizabeth B. Moynihan, Trustee, Age: 70
801 Pennsylvania Avenue, N.W., Washington,  D.C. 20004
Author  and  architectural  historian;  a trustee  of the Freer  Gallery  of Art
(Smithsonian  Institute),  Executive  Committee  of  Board  of  Trustees  of the
National Building Museum; a member of the Trustees Council,  Preservation League
of New York State.

Kenneth A. Randall, Trustee, Age: 72
6 Whittaker's Mill, Williamsburg, Virginia 23185
A director of Dominion  Resources,  Inc.  (electric  utility  holding  company),
Dominion Energy, Inc. (electric power and oil & gas producer), and Prime Retail,
Inc. (real estate  investment  trust);  formerly  President and Chief  Executive
Officer of The  Conference  Board,  Inc.  (international  economic  and business
research)  and a  director  of  Lumbermens  Mutual  Casualty  Company,  American
Motorists Insurance Company and American Manufacturers Mutual Insurance Company.

Edward V. Regan, Trustee, Age: 69
40 Park Avenue, New York, New York 10016
Chairman of Municipal  Assistance  Corporation for the City of New York;  Senior
Fellow of Jerome Levy Economics  Institute,  Bard College; a director of RBAsset
(real estate manager);  a director of OffitBank;  Trustee,  Financial Accounting
Foundation (FASB and GASB); formerly New York State Comptroller and trustee, New
York State and Local Retirement Fund.

Russell S. Reynolds, Jr., Trustee, Age: 67
8 Sound Shore Drive, Greenwich, Connecticut 06830
Chairman of The Directorship  Group, Inc. (corporate  governance  consulting and
executive  recruiting);  a  director  of  Professional  Staff  Limited  (a  U.K.
temporary staffing company);  a life trustee of International  House (non-profit
educational organization), and a trustee of the Greenwich Historical Society.

Donald W. Spiro, Vice Chairman and Trustee, Age: 73
399 Ski Trail, Smoke Rise, New Jersey 07405
A Trustee of other Oppenheimer Funds.  Formerly he held the following positions:
Chairman Emeritus (August 1991 - August 1999), Chairman (November 1987 - January
1991) and a director (January 1969 - August 1999) of the Manager;  President and
Director of the Distributor (July 1978 - January 1992).

Pauline Trigere, Trustee, Age: 87
498 Seventh Avenue, New York, New York 10018
Chairman and Chief Executive Officer of P.T. Concept (design and sale of women's
fashions).

Christian D. Smith,  Vice  President  and Portfolio  Manager,  Age: 37 Two World
Trade Center, New York, New York 10048-0203 Senior Vice President of the Manager
(since October 11, 1999); an officer of other  Oppenheimer  funds.  From January
1999 to September 1999 he was Co-Head of the Municipal Portfolio Management Team
of Prudential Global Asset Management (an investment advisor), prior to which he
was a portfolio manager for that firm (January 1990 to January 1999).

Clayton K. Yeutter, Trustee, Age: 68
10475 E. Laurel Lane, Scottsdale, Arizona 85259
Of  Counsel,  Hogan & Hartson  (a law  firm);  a  director  of Zurich  Financial
Services  (financial  services),  Zurich  Allied  AG and  Allied  Zurich  p.l.c.
(insurance investment management);  Caterpillar, Inc. (machinery), ConAgra, Inc.
(food and agricultural  products),  Farmers Insurance Company  (insurance),  FMC
Corp.  (chemicals  and  machinery) and Texas  Instruments,  Inc.  (electronics);
formerly (in descending chronological order), Counsellor to the President (Bush)
for Domestic Policy, Chairman of the Republican National Committee, Secretary of
the U.S. Department of Agriculture, U.S. Trade Representative.

Andrew J. Donohue, Secretary, Age: 49
Two World Trade Center, New York, New York 10048-0203
Executive Vice President  (since January 1993),  General  Counsel (since October
1991) and a Director  (since  September  1995) of the  Manager;  Executive  Vice
President  and General  Counsel  (since  September  1993) and a director  (since
January 1992) of the Distributor;  Executive Vice President, General Counsel and
a director of HarbourView Asset Management  Corporation,  Shareholder  Services,
Inc.,   Shareholder   Financial  Services,   Inc.  and  (since  September  1995)
Oppenheimer  Partnership Holdings,  Inc.; President and a director of Centennial
Asset Management Corporation (since September 1995); President,  General Counsel
and a director of Oppenheimer  Real Asset  Management,  Inc.  (since July 1996);
General Counsel (since May 1996) and Secretary (since April 1997) of Oppenheimer
Acquisition   Corp.;   Vice   President  and  a  director  of   OppenheimerFunds
International Ltd. and Oppenheimer Millennium Funds plc (since October 1997); an
officer of other Oppenheimer funds.

George C. Bowen, Director/Trustee, Age: 63
6803 South Tucson Way, Englewood, Colorado 80112
Formerly (until April 1999) Mr. Bowen held the following positions:  Senior Vice
President  (since  September  1987)  and  Treasurer  (since  March  1985) of the
Manager;  Vice President  (since June 1983) and Treasurer  (since March 1985) of
the Distributor;  Vice President (since October 1989) and Treasurer (since April
1986) of HarbourView Asset Management Corporation;  Senior Vice President (since
February 1992),  Treasurer (since July 1991) Assistant  Secretary and a director
(since December 1991) of Centennial  Asset  Management  Corporation;  President,
Treasurer and a director of Centennial  Capital  Corporation  (since June 1989);
Vice  President  and Treasurer  (since  August 1978) and Secretary  (since April
1981) of Shareholder Services, Inc.; Vice President,  Treasurer and Secretary of
Shareholder  Financial Services Inc. (since November 1989);  Assistant Treasurer
of Oppenheimer  Acquisition Corp.  (since March 1998);  Treasurer of Oppenheimer
Partnership  Holdings,  Inc. (since November 1989); Vice President and Treasurer
of  Oppenheimer  Real Asset  Management,  Inc.  (since July 1996);  Treasurer of
OppenheimerFunds  International Ltd. and Oppenheimer  Millennium Fund plc (since
October 1997).

O. Leonard Darling,  Executive Vice President and Chief Investment Officer, Age:
57 Two World  Trade  Center,  New York,  New York  10048-0203  Chief  Investment
Officer of the Manager (since 6/99);  Chief Executive Officer and Senior Manager
of  HarbourView  Asset  Management  Corporation;  Trustee  (1993 -  present)  of
Awhtolia College - Greece; formerly Chief Executive Officer (1993-June 1999).

Robert J. Bishop, Assistant Treasurer, Age: 41
6803 South Tucson Way, Englewood,  Colorado 80112
Vice  President  of the  Manager/Mutual  Fund  Accounting  (since May 1996);  an
officer of other Oppenheimer funds;  formerly an Assistant Vice President of the
Manager/Mutual  Fund Accounting  (April 1994 - May 1996),  and a Fund Controller
for the Manager.

Scott T. Farrar, Assistant Treasurer, Age: 34
6803 South Tucson Way, Englewood, Colorado 80112
Vice President of the Manager/Mutual Fund Accounting (since May 1996); Assistant
Treasurer of Oppenheimer  Millennium  Funds plc (since October 1997); an officer
of  other  Oppenheimer  Funds;  formerly  an  Assistant  Vice  President  of the
Manager/Mutual  Fund Accounting  (April 1994 - May 1996),  and a Fund Controller
for the Manager.

Brian W. Wixted, Treasurer, Age: 40
6803 South Tucson Way, Englewood, Colorado 80112
Senior Vice President and Treasurer (since April 1999) of the Manager; Treasurer
of  HarbourView  Asset  Management  Corporation,   Shareholder  Services,  Inc.,
Shareholder Financial Services,  Inc. and Oppenheimer Partnership Holdings, Inc.
(since April 1999); Assistant Treasurer of Oppenheimer  Acquisition Corp. (since
April 1999);  Assistant  Secretary of Centennial  Asset  Management  Corporation
(since April 1999);  formerly  Principal and Chief  Operating  Officer,  Bankers
Trust Company - Mutual Fund Services  Division  (March 1995 - March 1999);  Vice
President and Chief Financial Officer of CS First Boston  Investment  Management
Corp.  (September 1991 - March 1995); and Vice President and Accounting Manager,
Merrill Lynch Asset Management (November 1987 - September 1991).

Robert G. Zack, Assistant Secretary, Age: 51
Two World Trade Center, New York, New York 10048-0203
Senior Vice President (since May 1985) and Associate  General Counsel (since May
1981) of the Manager,  Assistant Secretary of Shareholder Services,  Inc. (since
May 1985),  and  Shareholder  Financial  Services,  Inc.  (since November 1989);
Assistant  Secretary of  OppenheimerFunds  International  Ltd.  and  Oppenheimer
Millennium  Funds plc (since  October  1997);  an  officer of other  Oppenheimer
funds.

      Remuneration of Trustees. The officers of the Fund and certain Trustees of
the Fund (Ms.  Macaskill  and Mr.  Spiro) who are  affiliated  with the  Manager
receive  no salary  or fee from the Fund.  The  remaining  Trustees  of the Fund
received the compensation  shown below. The compensation  from the Fund was paid
during its fiscal year ended July 31, 1999. The compensation from all of the New
York-based  Oppenheimer  funds  (including the Fund) was received as a director,
trustee  or member  of a  committee  of the  boards of those  funds  during  the
calendar year 1998.

--------------------------------------------------------------------------------
                                                               Total
                                              Retirement       Compensation
                                              Benefits         from all
                      Aggregate Compensation  Accrued as Part  New York based
Trustee's Name        From Fund               of Fund          Oppenheimer
and Position                                  Expenses         Funds (22 Funds)1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                        Leon Levy  $4,005             $543              $162,600
Chairman
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Study Committee         Robert G. G$1,325               $0              $113,383
Member2
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                        Phillip Griff$216               $0                    $0

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

Study Committee
Chairman,3              Benjamin Li$3,650             $657              $140,550
Audit Committee
Member
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Study Committee         Elizabeth B$2,108ihan           $0               $99,000
Member
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Audit Committee         Kenneth A. $2,274l            $341               $90,800
Member
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

Proxy Committee
Chairman, Audit         Edward V. R$1,912               $0               $89,800
Committee Member
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Russell S. Reynolds,
Jr.
Proxy Committee                    $1,531             $100               $67,200
Member
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                        Pauline Tri$1,496             $219               $60,000

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

Proxy Committee         Clayton K.$1,4314r              $0               $67,200
Member
--------------------------------------------------------------------------------
----------------------------

1 Aggregate  compensation  includes  fees,  deferred  compensation,  if any, and
retirement plan benefits accrued for a Director.
2   For the 1998 calendar year.
3 Aggregate  compensation  from the Fund  reflect  fees from 1/1/98 to 10/31/98.
Total compensation for the 1998 calendar year includes compensation received for
serving as Trustee or Director of 11 other  Oppenheimer  funds.  4 Includes $345
deferred under Deferred Compensation Plan described below.

      Retirement Plan for Trustees.  The Fund has adopted a retirement plan that
provides for payments to retired Trustees. Payments are up to 80% of the average
compensation  paid during a Trustee's five years of service in which the highest
compensation  was  received.  A Trustee must serve as trustee for any of the New
York-based  Oppenheimer  funds  for at least 15  years  to be  eligible  for the
maximum payment. Each Trustee's retirement benefits will depend on the amount of
the Trustee's future compensation and length of service. Therefore the amount of
those benefits cannot be determined at this time, nor can we estimate the number
of years of credited service that will be used to determine those benefits.

      Deferred Compensation Plan for Trustees. The Board of Trustees has adopted
a Deferred  Compensation  Plan for  disinterested  trustees that enables them to
elect to defer  receipt of all or a portion of the annual fees they are entitled
to receive from the Fund. Under the plan, the compensation deferred by a Trustee
is  periodically  adjusted as though an  equivalent  amount had been invested in
shares of one or more Oppenheimer funds selected by the Trustee. The amount paid
to the Trustee under the plan will be determined  based upon the  performance of
the selected funds.

      Deferral of Trustees' fees under the plan will not  materially  affect the
Fund's assets,  liabilities or net income per share.  The plan will not obligate
the Fund to retain the services of any Trustee or to pay any particular level of
compensation  to any Trustee.  Pursuant to an Order issued by the Securities and
Exchange  Commission,  the Fund may invest in the funds  selected by the Trustee
under  the  plan  without  shareholder  approval  for  the  limited  purpose  of
determining the value of the Trustee's deferred fee account.

      Major Shareholders.  As of October 15, 1999, the only persons who owned of
record  or who  were  known by the  Fund to own  beneficially  5% or more of the
Fund's outstanding Class A, Class B or Class C shares were:

    Merrill  Lynch  Pierce  Fenner & Smith  Inc.,  4800  Deer Lake  Drive  East,
Jacksonville,   Florida  32246,   which  owned   744,986.922   Class  B  shares,
representing 6.09% of the Class B shares then outstanding,  for the sole benefit
of its customers

      Merrill  Lynch  Pierce  Fenner & Smith  Inc.,  4800 Deer Lake Drive  East,
      Jacksonville,  Florida  32246,  which  owned  291,078.242  Class C shares,
      representing  19.26% of the Class C shares then outstanding,  for the sole
      benefit of its customers.

The Manager.  The Manager is  wholly-owned by Oppenheimer  Acquisition  Corp., a
holding company controlled by Massachusetts  Mutual Life Insurance Company.  The
Manager and the Fund have a Code of Ethics. It is designed to detect and prevent
improper personal trading by certain employees,  including  portfolio  managers,
that would compete with or take advantage of the Fund's portfolio  transactions.
Compliance with the Code of Ethics is carefully  monitored and strictly enforced
by the Manager.

      The portfolio  managers of the Fund are  principally  responsible  for the
day-to-day management of the Fund's investment  portfolio.  Other members of the
Manager's  fixed-income  portfolio  department,  particularly security analysts,
traders and other portfolio  managers have broad  experience  with  fixed-income
securities. They provide the Fund's portfolio managers with research and support
in managing the Fund's investments.

      The  Investment  Advisory  Agreement.   The  Manager  provides  investment
advisory  and  management  services  to the Fund  under an  investment  advisory
agreement  between the Manager and the Fund. The Manager selects  securities for
the  Fund's  portfolio  and  handles  its day-to day  business.  That  agreement
requires the Manager,  at its expense,  to provide the Fund with adequate office
space,  facilities  and  equipment.  It also requires the Manager to provide and
supervise the activities of all  administrative  and clerical personnel required
to   provide   effective   corporate   administration   for  the   Fund.   Those
responsibilities include the compilation and maintenance of records with respect
to the Fund's operations,  the preparation and filing of specified reports,  and
the  composition of proxy materials and  registration  statements for continuous
public sale of shares of the Fund.

      Expenses not expressly assumed by the Manager under the advisory agreement
are paid by the Fund.  The  investment  advisory  agreement  lists  examples  of
expenses paid by the Fund. The major categories relate to interest,  taxes, fees
to  disinterested  Trustees,  legal and audit  expenses,  custodian and transfer
agent expenses,  share issuance costs,  certain printing and registration costs,
brokerage commissions,  and non-recurring  expenses,  including litigation cost.
The management  fees paid by the Fund to the Manager are calculated at the rates
described  in the  Prospectus,  which are applied to the assets of the Fund as a
whole.  The fees are  allocated  to each class of shares based upon the relative
proportion of the Fund's net assets  represented  by that class.  The management
fees paid by the Fund to the  Manager  during  its last three  fiscal  years are
listed below.

        ------------------------------------------------------
         Fiscal Year   Management Fee Paid to
          Ended 7/31           OppenheimerFunds, Inc.
        ------------------------------------------------------
        ------------------------------------------------------
             1997                    $2,039,568
        ------------------------------------------------------
        ------------------------------------------------------
             1998                    $2,275,703
        ------------------------------------------------------
        ------------------------------------------------------
             1999                    $2,540,982
        ------------------------------------------------------

      The investment  advisory  agreement  states that in the absence of willful
misfeasance,  bad faith,  gross negligence in the performance of its duties,  or
reckless disregard for its obligations and duties under the investment  advisory
agreement,  the  Manager is not liable for any loss  sustained  by reason of any
investment  of the  Fund  assets  made  with due  care  and in good  faith.  The
agreement permits the Manager to act as investment adviser for any other person,
firm or corporation and to use the name  "Oppenheimer"  in connection with other
investment  companies  for which it may act as  investment  adviser  or  general
distributor.  If the Manager  shall no longer act as  investment  adviser to the
Fund, the Manager may withdraw the Fund's right to use the name "Oppenheimer" as
part of its name.

            Brokerage Policies of the Fund

Brokerage Provisions of the Investment Advisory Agreement.  One of the duties of
the Manager under the investment advisory agreement is to buy and sell portfolio
securities for the Fund. The investment advisory agreement allows the Manager to
use  broker-dealers  to effect  the  Fund's  portfolio  transactions.  Under the
agreement,  the Manager may employ those broker-dealers  (including "affiliated"
brokers,  as that term is defined in the  Investment  Company Act) that,  in the
Manager's best judgment based on all relevant factors, will implement the Fund's
policy to obtain,  at  reasonable  expense,  the "best  execution"  of portfolio
transactions.  "Best execution"  refers to prompt and reliable  execution at the
most  favorable  price  obtainable.   The  Manager  need  not  seek  competitive
commission bidding. However, the Manager is expected to minimize the commissions
paid to the extent  consistent  with the  interest  and  policies of the Fund as
established by its Board of Trustees.


      Under the investment  advisory  agreement,  the Manager may select brokers
that provide  brokerage  and/or research  services for the Fund and/or the other
accounts over which the Manager or its affiliates  have  investment  discretion.
The commissions paid to such brokers may be higher than another qualified broker
would  charge,  if  the  Manager  makes  a good  faith  determination  that  the
commission is fair and reasonable in relation to the services provided.  Subject
to those other  considerations,  as a factor in selecting brokers for the Fund's
portfolio  transactions,  the Manager may also  consider  sales of shares of the
Fund and other investment companies managed by the Manager or its affiliates.

Brokerage Practices Followed by the Manager. The Manager allocates brokerage for
the Fund subject to the provisions of the investment  advisory agreement and the
procedures and rules described above.  Generally the Manager's portfolio traders
allocate brokerage upon  recommendations  from the Manager's portfolio managers.
In certain instances,  portfolio managers may directly place trades and allocate
brokerage.  In either case,  the  Manager's  executive  officers  supervise  the
allocation of brokerage.

      Most securities  purchases made by the Fund are in principal  transactions
at net prices.  The Fund usually  deals  directly with the selling or purchasing
principal or market maker without incurring charges for the services of a broker
on its behalf unless the Manager determines that a better price or execution may
be obtained  by using the  services  of a broker.  Therefore,  the Fund does not
incur  substantial   brokerage  costs.   Portfolio   securities  purchased  from
underwriters  include  a  commission  or  concession  paid by the  issuer to the
underwriter in the price of the security.  Portfolio  securities  purchased from
dealers include a spread between the bid and asked price.

      The Fund seeks to obtain prompt  execution of orders at the most favorable
net prices. In an option  transaction,  the Fund ordinarily uses the same broker
for the purchase or sale of the option and any  transaction in the investment to
which the option relates. When possible, the Manager tries to combine concurrent
orders to  purchase or sell the same  security by more than one of the  accounts
managed by the Manager or its affiliates.  The transactions under those combined
orders are averaged as to price and allocated in accordance with the purchase or
sale orders actually placed for each account.

      The  investment   advisory  agreement  permits  the  Manager  to  allocate
brokerage for research services.  The research services provided by a particular
broker may be useful only to one or more of the advisory accounts of the Manager
and  its  affiliates.  Investment  research  received  by the  Manager  for  the
commissions  paid by those other accounts may be useful both to the Fund and one
or more of the Manager's other  accounts.  Investment  research  services may be
supplied  to the Manager by a third  party at the  instance of a broker  through
which trades are placed.  Investment  research services include  information and
analyses on particular  companies  and  industries as well as market or economic
trends and portfolio  strategy,  market  quotations  for portfolio  evaluations,
information systems,  computer hardware and similar products and services.  If a
research  service also assists the Manager in a  non-research  capacity (such as
bookkeeping  or other  administrative  functions),  then only the  percentage or
component   that  provides   assistance   to  the  Manager  in  the   investment
decision-making process may be paid in commission dollars.

      The Board of Trustees  has  permitted  the Manager to use  concessions  on
fixed-price offerings to obtain research, in the same manner as is permitted for
agency  transactions.  The Board has also  permitted  the  Manager to use stated
commissions on secondary  fixed-income  agency trades to obtain  research if the
broker  represents  to the  Manager  that:  (i) the trade is not from or for the
broker's own  inventory,  (ii) the trade was executed by the broker on an agency
basis at the stated commission,  and (iii) the trade is not a riskless principal
transaction.

      The research services provided by brokers broaden the scope and supplement
the research activities of the Manager.  That research provides additional views
and  comparisons  for  consideration  and helps  the  Manager  to obtain  market
information  for the valuation of securities  that are either held in the Fund's
portfolio or are being considered for purchase. The Manager provides information
to the  Board of the Fund  about  the  commissions  paid to  brokers  furnishing
research services, together with the Manager's representation that the amount of
such  commissions  was  reasonably  related  to the  value  or  benefit  of such
services.

      Other funds advised by the Manager have investment objectives and policies
similar to those of the Fund.  Those other  funds may  purchase or sell the same
securities  as the Fund at the same time as the Fund,  which  could  affect  the
supply  and  price of the  securities.  If two or more of funds  advised  by the
Manager  purchase the same  security on the same day from the same  dealer,  the
Manager may average the price of the transactions and allocate the average among
the funds.

            Distribution and Service Plans

The Distributor.  Under its General  Distributor's  Agreement with the Fund, the
Distributor  acts as the Fund's principal  underwriter in the continuous  public
offering of the Fund's Class A, Class B and Class C shares.  The  Distributor is
not  obligated  to  sell  a  specific  number  of  shares.   Expenses   normally
attributable to sales are borne by the Distributor.  They exclude payments under
the  Distribution  and  Service  Plans but include  advertising  and the cost of
printing  and  mailing  prospectuses  (other  than those  furnished  to existing
shareholders).

      The compensation paid to (or retained by) the Distributor from the sale of
shares or on the redemption of shares is discussed in the table below:

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


          Aggregate     Class A      Commissions    Commissions  Commissions
 Fiscal   Front-End     Front-End    on Class A     on Class B   on Class C
 Year     Sales         Sales        Shares         Shares       Shares
 Ended    Charges on    Charges      Advanced by    Advanced by  Advanced by
 7/31:    Class A       Retained by  Distributor1   Distributor1 Distributor1
          Shares        Distributor
 ------------------------------------------------------------------------------
 ------------------------------------------------------------------------------
   1997     $951,080      $160,054        N/A        $1,195,489     $45,765
 ------------------------------------------------------------------------------
 ------------------------------------------------------------------------------
   1998     $922,528      $141,083      $70,244      $1,607,116     $66,159
 ------------------------------------------------------------------------------
 ------------------------------------------------------------------------------
   1999     $924,929      $154,753      $188,991     $1,254,294     $84,556
 ------------------------------------------------------------------------------
1. The Distributor  advances commission payments to dealers for certain sales of
   Class A  shares  and for  sales of  Class B and  Class C shares  from its own
   resources  at the time of sale.  Because  Class B shares  convert  to Class A
   shares 72 months after purchase,  the "life-of-class" return for Class B uses
   Class A performance for the period after conversion.
2.    Fiscal period of seven months.

--------------------------------------------------------------------------------
                     Class A Contingent  Class B Contingent  Class C Contingent
Fiscal Year          Deferred Sales      Deferred Sales      Deferred Sales
Ended 7/31:          Charges    Retained  Charges   Retained Charges Retained by
                     by Distributor      by                  Distributor
                                          Distributor
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
1999                 $0                       $291,981             $8,385
--------------------------------------------------------------------------------

      For  additional  information  about  distribution  of the  Fund's  shares,
including fees and expenses, please refer to "Distribution and Service Plans."

Distribution  and Service  Plans.  The Fund has  adopted a Service  Plan for its
Class A shares and  Distribution  and Service  Plans for its Class B and Class C
shares under Rule 12b-1 of the Investment  Company Act.  Under those plans,  the
Fund makes  payments to the  Distributor  in  connection  with the  distribution
and/or servicing of the shares of the particular class.

      Each  plan has been  approved  by a vote of the Board of  Trustees  of the
Fund,  including a majority  of the  Independent  Trustees,  cast in person at a
meeting called for the purpose of voting on that plan. The Manager cast the vote
to approve the Class C plan as the sole initial holder of Class C shares.

      Under the plans the  Manager  and the  Distributor  may make  payments  to
affiliates  and, in their sole  discretion,  from time to time may use their own
resources to make payments to brokers,  dealers or other financial  institutions
for  distribution  and  administrative  services  they perform at no cost to the
Fund.  The Manager may use profits from the  advisory  fee it receives  from the
Fund. The Distributor and the Manager may, in their sole discretion, increase or
decrease  the amount of  payments  they make to plan  recipients  from their own
resources.

      Unless a plan is  terminated  as described  below,  the plan  continues in
effect  from year to year,  but only if the  Fund's  Board of  Trustees  and its
Independent  Trustees  specifically  vote  annually to approve its  continuance.
Approval must be by a vote cast in person at a meeting called for the purpose of
voting on continuing  the plan. A plan may be terminated at any time by the vote
of a majority  of the  Independent  Trustees  or by the vote of the holders of a
"majority" (as defined in the Investment  Company Act) of the outstanding shares
of that class.

          The Board and the  Independent  Trustees  must  approve  all  material
    amendments  to a plan.  An  amendment to increase  materially  the amount of
    payments to be made under the plan must be approved by  shareholders  of the
    class  affected  by the  amendment.  Because  Class B  shares  automatically
    convert  into  Class A shares  after six  years,  the Fund must  obtain  the
    approval of both Class A and Class B  shareholders  for an  amendment to the
    Class A plan that would materially increase the amount to be paid under that
    plan.  That approval must be by a "majority"  (as defined in the  Investment
    Company Act) of the shares of each class, voting separately by Class.

      While the plans are in effect,  the  Treasurer  of the Fund shall  provide
separate  written  reports on the plans to the Fund's Board of Trustees at least
quarterly  for its review.  The reports  shall detail the amount of all payments
made  under a plan and the  purpose  for which the  payments  were  made.  Those
reports are subject to the review and  approval of the  Independent  Trustees in
the exercise of their fiduciary duty.

      Each plan states that while it is in effect,  the selection or replacement
and nomination of those Trustees of the Fund who are not "interested persons" of
the Fund is  committed  to the  discretion  of the  Independent  Trustees.  This
provision  does not  prevent  the  involvement  of others in the  selection  and
nomination  process as long as the final  decision as to selection or nomination
is approved by a majority of the Independent Trustees.

      Under the plans,  no payment will be made to any  recipient in any quarter
in which the  aggregate net asset value of all Fund shares held by the recipient
for itself and its customers does not exceed a minimum amount,  if any, that may
be set from  time to time by a  majority  of the  Fund's  Independent  Trustees.
Initially,  the Board of Trustees  has set the fees at the maximum  rate allowed
under  the plans and has set no  minimum  asset  amount  needed to  qualify  for
payments.

      Class A Service  Plan.  Under the Class A service  plan,  the  Distributor
currently  uses the fees it receives  from the Fund to pay brokers,  dealers and
other financial institutions (they are referred to as "recipients") for personal
services and account  maintenance  services they provide for their customers who
hold Class A shares.  The services  include,  among others,  answering  customer
inquiries about the Fund,  assisting in establishing and maintaining accounts in
the Fund,  making the Fund's  investment  plans  available and  providing  other
services at the request of the Fund or the  Distributor.  The Distributor  makes
payments to plan  recipients  quarterly at an annual rate not to exceed 0.25% of
the average  annual net assets of Class A shares held in accounts of the service
providers or their customers.

      For the fiscal year ended July 31, 1999, payments under the Plan for Class
A  shares  totaled  $757,647,  all of  which  was  paid  by the  Distributor  to
recipients.  That included $25,906 paid to an affiliate of the Distributor.  Any
unreimbursed  expenses the Distributor incurs with respect to Class A shares for
any fiscal year may not be recovered in subsequent  years.  The  Distributor may
not use  payments  received  under the  Class A plan to pay any of its  interest
expenses, carrying charges, other financial costs, or allocation of overhead.

          Class B and Class C Service  and  Distribution  Plan Fees.  Under each
    plan,  service fees and distribution fees are computed on the average of the
    net asset  value of shares in the  respective  class,  determined  as of the
    close of each regular business day during the period.  The Class B and Class
    C plans  provide  for the  Distributor  to be  compensated  at a flat  rate,
    whether the  Distributor's  distribution  expenses are more or less than the
    amounts paid by the Fund under the plans during that period. The Class B and
    Class C plans permit the  Distributor to retain both the  asset-based  sales
    charges and the service fee on shares or to pay  recipients  the service fee
    on a quarterly basis, without payment in advance.

      The  Distributor  presently  intends to pay  recipients the service fee on
Class B and  Class C  shares  in  advance  for the  first  year the  shares  are
outstanding.  After the first year shares are outstanding, the Distributor makes
payments  quarterly  on those  shares.  The advance  payment is based on the net
asset value of shares sold.  Shares  purchased by exchange do not qualify for an
advance  service fee payment.  If Class B or Class C shares are redeemed  during
the first year after their purchase,  the recipient of the service fees on those
shares will be  obligated  to repay the  Distributor  a pro rata  portion of the
advance payment made on those shares.

      The Distributor  retains the  asset-based  sales charge on Class B shares.
The Distributor  retains the  asset-based  sales charge on Class C shares during
the first year the shares are outstanding.  It pays the asset-based sales charge
as an ongoing  commission to the dealer on Class C shares outstanding for a year
or  more.  If a  dealer  has a  special  agreement  with  the  Distributor,  the
Distributor will pay the Class B and/or Class C service fees and the asset-based
sales charge to the dealer  quarterly in lieu of paying the sales commission and
service fee in advance at the time of purchase.

      The  asset-based  sales  charge  on  Class  B and  Class C  shares  allows
investors to buy shares  without a front-end  sales  charge  while  allowing the
Distributor  to  compensate  dealers that sell those shares.  The  Distributor's
actual  expenses  in  selling  Class B and  Class C shares  may be more than the
payments it  receives  from  contingent  deferred  sales  charges  collected  on
redeemed shares and from the Fund under the plans. The Fund pays the asset-based
sales charge to the Distributor for its services rendered in distributing  Class
B and Class C shares.  The payments are made to the  Distributor  in recognition
that the Distributor:
         pays sales commissions to authorized brokers and dealers at the time of
         sale and pays service fees as described in the Prospectus,  may finance
         payment of sales  commissions  and/or the  advance of the  service  fee
         payment to recipients  under the plans,  or may provide such  financing
         from its own resources or from the  resources of an affiliate,  employs
         personnel  to support  distribution  of shares,  and bears the costs of
         sales  literature,  advertising  and  prospectuses  (other  than  those
         furnished to current  shareholders)  and state "blue sky"  registration
         fees and certain other distribution expenses.

      The  Distributor's  actual  expenses in selling Class B and Class C shares
may be more that the payments it receives  from the  contingent  deferred  sales
charges  collected  on  redeemed  shares and from the Fund  under the plans.  If
either  the  Class B or Class C plan is  terminated  by the  Fund,  the Board of
Trustees may allow the Fund to continue payments of the asset-based sales charge
to the Distributor for distributing  shares before the plan was terminated.  The
Class B and Class C plans allow for the carry-forward of distribution  expenses,
to be recovered from asset based sales charges in subsequent fiscal periods.

<TABLE>
<CAPTION>

--------------------------------------------------------------------------------
Distribution Fees Paid to the Distributor in the Fiscal Year Ended 7/31/99
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
<S>              <C>          <C>              <C>                     <C>
                                                                        Distributor's
                                                   Distributor's        Unreimbursed
    Class         Total                              Aggregate        Expenses as % of
                 Payments     Amount Retained  Unreimbursed Expenses    Net Assets of
                Under Plan    by Distributor         Under Plan             Class
----------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------
Class B Plan      $1,294,892        $1,062,283             $4,059,718             3.06%
----------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------
Class C Plan        $146,564           $93,541               $207,394             1.23%
----------------------------------------------------------------------------------------
</TABLE>

          All  payments  under the Class B and Class C plans are  subject to the
    limitations  imposed by the Conduct  Rules of the  National  Association  of
    Securities  Dealers,  Inc.  on  payments of  asset-based  sales  charges and
    service fees to NASD members.

            Performance of the Fund

Explanation  of  Performance  Terminology.  The Fund uses a variety  of terms to
illustrate  its   performance.   These  terms  include   "standardized   yield,"
"tax-equivalent   yield,"  "dividend  yield,"  "average  annual  total  return,"
"cumulative  total return," "average annual total return at net asset value" and
"total  return at net asset  value."  An  explanation  of how  yields  and total
returns are  calculated  is set forth  below.  The charts  below show the Fund's
performance  during its most  recent  fiscal  year end.  You can obtain  current
performance  information by calling the Fund's Transfer Agent at  1-800-525-7048
or    by    visiting    the    OppenheimerFunds    Internet    web    site    at
http://www.oppenheimerfunds.com.

      The Fund's  illustrations of its performance data in  advertisements  must
comply  with  rules of the  Securities  and  Exchange  Commission.  Those  rules
describe  the  types of  performance  data  that may be used and how it is to be
calculated.  In general,  any  advertisement by the Fund of its performance data
must include the average annual total returns for the advertised class of shares
of the Fund.  Those  returns must be shown for the 1, 5 and 10-year  periods (or
the life of the class,  if less) ending as of the most recently  ended  calendar
quarter prior to the  publication  of the  advertisement  (or its submission for
publication).  Certain types of yields may also be shown, provided that they are
accompanied by standardized average annual total returns.

      Use of  standardized  performance  calculations  enables  an  investor  to
compare the Fund's  performance  to the  performance of other funds for the same
periods.  However,  a number of factors  should be  considered  before using the
Fund's performance information as a basis for comparison with other investments:

         Yields and total  returns  measure the  performance  of a  hypothetical
         account  in  the  Fund  over  various  periods  and  do  not  show  the
         performance of each shareholder's  account.  Your account's performance
         will  vary  from  the  model  performance  data if your  dividends  are
         received in cash, or you buy or sell shares  during the period,  or you
         bought your  shares at a different  time and price than the shares used
         in the model.
         The Fund's  performance  returns do not  reflect the effect of taxes or
         distributions.  An investment in the Fund is not insured by the FDIC or
         any other government agency.
         The  principal  value of the  Fund's  shares,  and its yields and total
         returns are not  guaranteed  and  normally  will  fluctuate  on a daily
         basis. When an investor's  shares are redeemed,  they may be worth more
         or less than their original cost.
         Yields and total returns for any given past period represent historical
         performance  information  and are not, and should not be considered,  a
         prediction of future yields or returns.

      The performance of each class of shares is shown  separately,  because the
performance  of each class of shares will usually be different.  That is because
of the  different  kinds of  expenses  each  class  bears.  The yields and total
returns of each class of shares of the Fund are  affected by market  conditions,
the quality of the Fund's  investments,  the maturity of those investments,  the
types of  investments  the  Fund  holds,  and its  operating  expenses  that are
allocated to the particular class.

      Yields.  The Fund uses a variety of  different  yields to  illustrate  its
current returns. Each class of shares calculates its yield separately because of
the different expenses that affect each class.

      Standardized  Yield. The "standardized  yield" (sometimes referred to just
as "yield") is shown for a class of shares for a stated 30-day period. It is not
based on actual  distributions  paid by the Fund to  shareholders  in the 30-day
period,  but is a hypothetical  yield based upon the net investment  income from
the Fund's portfolio  investments for that period.  It may therefore differ from
the "dividend yield" for the same class of shares, described below.

      Standardized  yield is calculated using the following formula set forth in
rules  adopted by the  Securities  and Exchange  Commission,  designed to assure
uniformity in the way that all funds calculate their yields:

                                    (a-b)    6
            Standardized Yield = 2 ((--- + 1)  - 1)
                                    ( cd)


      The symbols above represent the following factors:
      a =  dividends and interest earned during the 30-day period.
      b =  expenses accrued for the period (net of any expense assumptions).
      c = the  average  daily  number of shares  of that  class  outstanding
          during the 30-day period that were entitled to receive dividends.
      d = the maximum offering price per share of that class on the last day
          of the period, adjusted for undistributed net investment income.

      The standardized  yield for a particular 30-day period may differ from the
yield for other periods. The SEC formula assumes that the standardized yield for
a 30-day  period  occurs  at a  constant  rate  for a  six-month  period  and is
annualized at the end of the six-month period. Additionally,  because each class
of shares is subject to different  expenses,  it is likely that the standardized
yields of the Fund's classes of shares will differ for any 30-day period.

      Dividend  Yield.  The Fund may quote a "dividend  yield" for each class of
its shares.  Dividend  yield is based on the dividends paid on a class of shares
during the actual dividend period. To calculate dividend yield, the dividends of
a class  declared  during a stated  period  are added  together,  and the sum is
multiplied by 12 (to  annualize  the yield) and divided by the maximum  offering
price on the last day of the dividend period. The formula is shown below:

Dividend Yield = dividends paid x 12/maximum offering price (payment date)

      The maximum offering price for Class A shares includes the current maximum
initial sales charge.  The maximum offering price for Class B and Class C shares
is the net asset value per share,  without  considering the effect of contingent
deferred  sales  charges.  The Class A dividend yield may also be quoted without
deducting the maximum initial sales charge.

      Tax-Equivalent  Yield. The "tax-equivalent  yield" of a class of shares is
the  equivalent  yield that would have to be earned on a taxable  investment  to
achieve the after-tax results represented by the Fund's tax-equivalent yield. It
adjusts the Fund's  standardized yield, as calculated above, by a stated federal
tax rate.  Using  different tax rates to show  different tax  equivalent  yields
shows  investors in different tax brackets the tax equivalent  yield of the Fund
based on their own tax bracket.

      The  tax-equivalent  yield is based on a 30-day period, and is computed by
dividing  the  tax-exempt  portion of the Fund's  current  yield (as  calculated
above) by one minus a stated income tax rate. The result is added to the portion
(if any) of the Fund's current yield that is not tax-exempt.

      The tax-equivalent  yield may be used to compare the tax effects of income
derived  from the Fund with income  from  taxable  investments  at the tax rates
stated.  Your tax bracket is determined by your federal and state taxable income
(the net amount  subject to federal and state  income tax after  deductions  and
exemptions).  The tax-equivalent  yield table assumes that the investor is taxed
at  the  highest  bracket,   regardless  of  whether  a  switch  to  non-taxable
investments would cause a lower bracket to apply.

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

                   The Fund's Yields for the 30-Day Periods Ended 7/31/99
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                           Tax-Equivalent Yield
                                                             (45.22% Combined
                                                            Federal/California
             Standardized Yield        Dividend Yield          Tax Bracket)

Class of
Shares
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
             Without                Without               Without
             Sales      After       Sales      After      Sales       After
             Charge     Sales       Charge     Sales      Charge      Sales
                        Charge                 Charge                 Charge
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A           4.67%       4.44%      5.01%      4.77%       8.52%      8.10%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B           3.90%         N/A      4.23%        N/A       7.12%        N/A
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class C           3.90%         N/A      4.24%        N/A       7.12%        N/A
--------------------------------------------------------------------------------

      Total Return Information.  There are different types of "total returns" to
measure  the  Fund's  performance.  Total  return  is the  change  in value of a
hypothetical  investment  in the Fund  over a given  period,  assuming  that all
dividends and capital gains  distributions  are reinvested in additional  shares
and that  the  investment  is  redeemed  at the end of the  period.  Because  of
differences  in expenses  for each class of shares,  the total  returns for each
class are separately  measured.  The cumulative total return measures the change
in value over the entire  period (for  example,  ten years).  An average  annual
total  return  shows the  average  rate of return for each year in a period that
would  produce the  cumulative  total  return over the entire  period.  However,
average annual total returns do not show actual  year-by-year  performance.  The
Fund uses  standardized  calculations for its total returns as prescribed by the
SEC. The methodology is discussed below.

      In calculating total returns for Class A shares, the current maximum sales
charge of 4.75% (as a  percentage  of the offering  price) is deducted  from the
initial  investment  ("P") (unless the return is shown without sales charge,  as
described  below).  For Class B shares,  payment  of the  applicable  contingent
deferred  sales charge is applied,  depending on the period for which the return
is shown: 5.0% in the first year, 4.0% in the second year, 3.0% in the third and
fourth  years,  2.0%  in the  fifth  year,  1.0%  in the  sixth  year  and  none
thereafter.  For Class C shares,  the 1%  contingent  deferred  sales  charge is
deducted for returns for the 1-year period.

      Average  Annual Total  Return.  The "average  annual total return" of each
class  is an  average  annual  compounded  rate of  return  for  each  year in a
specified number of years. It is the rate of return based on the change in value
of a hypothetical  initial  investment of $1,000 ("P" in the formula below) held
for a number of years ("n") to achieve an Ending  Redeemable Value ("ERV" in the
formula) of that investment, according to the following formula:

                 1/n
            (ERV)
            (---)   -1 = Average Annual Total Return
            ( P )


      Cumulative  Total  Return.  The  "cumulative  total  return"   calculation
measures  the change in value of a  hypothetical  investment  of $1,000  over an
entire period of years. Its calculation uses some of the same factors as average
annual  total  return,  but it does not  average the rate of return on an annual
basis. Cumulative total return is determined as follows:
--------------------------------------------------------------------------------

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

            ERV - P
            ------- = Total Return
               P


      Total  Returns  at Net  Asset  Value.  From time to time the Fund may also
quote a  cumulative  or an average  annual  total  return  "at net asset  value"
(without  deducting sales charges) for Class A, Class B or Class C shares.  Each
is based on the difference in net asset value per share at the beginning and the
end of the period for a hypothetical investment in that class of shares (without
considering  front-end  or  contingent  deferred  sales  charges) and takes into
consideration the
    reinvestment of dividends and capital gains distributions.

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

                   The Fund's Total Returns for the Periods Ended 7/31/99
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
          Cumulative Total              Average Annual Total Returns
             Returns (10
          years or life of
               class)
Class of
Shares
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                   5-Year           10-Year
                                 1-Year          (or life of      (or life of
                                                   class)            class)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
          After    Without  After    Without  After    Without  After   Without
          Sales    Sales    Sales    Sales    Sales    Sales    Sales   Sales
           Charge   Charge   Charge   Charge   Charge   Charge  Charge   Charge
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A     85.96%   95.23%   -3.24%    1.59%    5.42%    6.45%   6.40%    6.92%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B     33.75%   33.75%   -4.02%    0.82%    5.32%    5.64%  4.77%*   4.77%*
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class C     19.63%   19.63%   -0.24%    0.73%  4.90%**  4.90%**     N/A      N/A
--------------------------------------------------------------------------------
Inception of Class A:   1/3/88
*Inception of Class B:  5/3/93
**Inception of Class C: 11/1/95

Other  Performance  Comparisons.  The Fund compares its performance  annually to
that of an  appropriate  broadly  based  market  index in its  Annual  Report to
shareholders.  You can obtain that  information by contacting the Transfer Agent
at the addresses or telephone  numbers  shown on the cover of this  Statement of
Additional  Information.  The Fund may also compare its  performance  to that of
other  investments,  including  other  mutual  funds,  or  use  rankings  of its
performance  by  independent  ranking  entities.  Examples of these  performance
comparisons are set forth below.

      Lipper Rankings. From time to time the Fund may publish the ranking of the
performance of its Class A, Class B or Class C shares by Lipper Inc. ("Lipper").
Lipper is a widely recognized independent mutual fund monitoring service. Lipper
monitors the performance of regulated investment companies,  including the Fund,
and ranks their performance for various periods based on categories  relating to
investment  objectives.  The performance of the Fund is ranked by Lipper against
all other bond funds,  other than money market funds, and all general  municipal
bond funds.  The Lipper  performance  rankings  are based on total  returns that
include the reinvestment of capital gain  distributions and income dividends but
do not take sales  charges or taxes into  consideration.  Lipper also  publishes
"peer-group"  indices of the  performance of all mutual funds in a category that
it  monitors  and  averages  of the  performance  of  the  funds  in  particular
categories.

      Morningstar  Ratings and Rankings.  From time to time the Fund may publish
the ranking  and/or star rating of the  performance  of its classes of shares by
Morningstar,  Inc., an independent mutual fund monitoring  service.  Morningstar
rates and ranks  mutual funds in broad  investment  categories:  domestic  stock
funds,  international stock funds,  taxable bond funds and municipal bond funds.
The Fund is included in the municipal bond category.

      Morningstar  proprietary  star ratings  reflect  historical  risk-adjusted
total investment return.  Investment return measures a fund's (or class's) one-,
three-,  five- and ten-year  average  annual  total  returns  (depending  on the
inception of the fund or class) in excess of 90-day U.S.  Treasury  bill returns
after considering the fund's sales charges and expenses.  Risk measured a fund's
(or class's)  performance  below 90-day U.S.  Treasury  bill  returns.  Risk and
investment  return are combined to produce star ratings  reflecting  performance
relative to the other funds in a fund's  category.  Five stars is the  "highest"
ranking (top 10% of funds in a category),  four stars is "above  average"  (next
22.5%),  three stars is "average" (next 35%), two stars is "below average" (next
22.5%) and one star is "lowest"  (bottom  10%).  The current  star rating is the
fund's (or class's)  overall rating,  which is the fund's 3-year rating,  or its
combined 3- and 5-year ranking (weighted 60%/40% respectively),  or its combined
3-, 5-, and 10-year ranking (weighted 40%, 30% and 30%, respectively), depending
on the  inception  date of the fund (or class).  Rankings  are subject to change
monthly.

      The Fund may also compare its total return  ranking to that of other funds
in its Morningstar category, in addition to its star ratings. Those total return
ranking are percentages from one percent to one hundred percent and are not risk
adjusted. For example, if a fund is in the 94th percentile,  that means that 94%
of the funds in the same category performed better than it did.

      Performance  Rankings and Comparisons by Other Entities and  Publications.
From  time  to time  the  Fund  may  include  in its  advertisements  and  sales
literature performance  information about the Fund cited in newspapers and other
periodicals  such as The New York Times, the Wall Street Journal,  Barron's,  or
similar publications.  That information may include performance  quotations from
other sources,  including Lipper and Morningstar.  The performance of the Fund's
Class A,  Class B or Class C  shares  may be  compared  in  publications  to the
performance  of various  market  indices  or other  investments,  and  averages,
performance  rankings or other  benchmarks  prepared by  recognized  mutual fund
statistical services.

      Investors  may also wish to compare the Fund's Class A, Class B or Class C
returns  to the  return on  fixed-income  investments  available  from banks and
thrift   institutions.   Those  include   certificates   of  deposit,   ordinary
interest-paying  checking  and  savings  accounts,  and other  forms of fixed or
variable time deposits,  and various other  instruments  such as Treasury bills.
However, the Fund's returns and share price are not guaranteed or insured by the
FDIC or any  other  agency  and will  fluctuate  daily,  while  bank  depository
obligations  may be insured by the FDIC and may  provide  fixed rates of return.
Repayment of principal and payment of interest on Treasury  securities is backed
by the full faith and credit of the U.S. Government.

      From time to time, the Fund may publish rankings or ratings of the Manager
or Transfer Agent, and of the investor services provided by them to shareholders
of the Oppenheimer  funds,  other than  performance  rankings of the Oppenheimer
funds themselves. Those ratings or rankings of shareholder and investor services
by third parties may include  comparisons of their services to those provided by
other mutual fund families selected by the rating or ranking services.  They may
be based upon the opinions of the rating or ranking  service  itself,  using its
research or judgment, or based upon surveys of investors,  brokers, shareholders
or others.

--------------------------------------------------------------------------------
ABOUT YOUR ACCOUNT
--------------------------------------------------------------------------------

            How to Buy Shares

Additional  information is presented below about the methods that can be used to
buy shares of the Fund.  Appendix C contains more information  about the special
sales charge  arrangements  offered by the Fund, and the  circumstances in which
sales charges may be reduced or waived for certain classes of investors.

AccountLink.  When shares are purchased through AccountLink,  each purchase must
be at least $25.  Shares  will be  purchased  on the  regular  business  day the
Distributor  is  instructed  to initiate the  Automated  Clearing  House ("ACH")
transfer to buy the shares.  Dividends will begin to accrue on shares  purchased
with the proceeds of ACH transfers on the business day the Fund receives Federal
Funds for the purchase  through the ACH system  before the close of The New York
Stock Exchange. The Exchange normally closes at 4:00 P.M., but may close earlier
on certain days. If Federal Funds are received on a business day after the close
of the Exchange, the shares will be purchased and dividends will begin to accrue
on the next regular  business  day. The proceeds of ACH  transfers  are normally
received by the Fund 3 days after the transfers are initiated.  The  Distributor
and the Fund are not responsible for any delays in purchasing  shares  resulting
from delays in ACH transmissions.

Reduced Sales Charges.  As discussed in the  Prospectus,  a reduced sales charge
rate may be obtained for Class A shares under Right of Accumulation  and Letters
of Intent  because of the  economies of sales  efforts and reduction in expenses
realized by the  Distributor,  dealers and brokers  making such sales.  No sales
charge is imposed in certain other circumstances described in Appendix C to this
Statement of Additional  Information because the Distributor or dealer or broker
incurs little or no selling expenses.

      Right of  Accumulation.  To qualify for the lower sales  charge rates that
apply to  larger  purchases  of Class A  shares,  you and  your  spouse  can add
together:
         Class A and Class B shares you purchase for your  individual  accounts,
         or for your  joint  accounts,  or for trust or  custodial  accounts  on
         behalf of your children who are minors,  and current purchases of Class
         A and Class B shares of the Fund and other  Oppenheimer funds to reduce
         the sales  charge  rate that  applies to current  purchases  of Class A
         shares,  and  Class A and  Class B  shares  of  Oppenheimer  funds  you
         previously purchased subject to an initial or contingent deferred sales
         charge to reduce the sales charge rate for current purchases of Class A
         shares,  provided  that you still  hold your  investment  in one of the
         Oppenheimer funds.

            A fiduciary can count all shares  purchased  for a trust,  estate or
other  fiduciary  account  (including one or more employee  benefit plans of the
same employer) that has multiple  accounts.  The Distributor will add the value,
at current offering price, of the shares you previously  purchased and currently
own to the value of current  purchases to  determine  the sales charge rate that
applies. The reduced sales charge will apply only to current purchases. You must
request it when you buy shares.

     The Oppenheimer  Funds.  The  Oppenheimer  funds are those mutual funds for
which  the  Distributor  acts  as the  distributor  or the  sub-distributor  and
currently include the following:

Oppenheimer California Municipal Fund         Oppenheimer Large Cap Growth Fund
Oppenheimer Capital Appreciation Fund        Oppenheimer Money Market Fund, Inc.
Oppenheimer Capital Preservation Fund       Oppenheimer Multiple Strategies Fund
Oppenheimer Developing Markets Fund        Oppenheimer Multi-Sector Income Trust
Oppenheimer Discovery Fund               Oppenheimer Multi-State Municipal Trust
Oppenheimer Enterprise Fund                   Oppenheimer Municipal Bond Fund
Oppenheimer Europe Fund                      Oppenheimer New York Municipal Fund
Oppenheimer Global Fund                       Oppenheimer Series Fund, Inc.
Oppenheimer Global Growth & Income Fund       Oppenheimer U.S. Government Trust
Oppenheimer Gold & Special Minerals Fund      Oppenheimer Trinity Core Fund
Oppenheimer Growth Fund                       Oppenheimer Trinity Growth Fund
Oppenheimer International Growth Fund         Oppenheimer Trinity Value Fund
Oppenheimer International Small Company Fund  Oppenheimer World Bond Fund

      There is an initial sales charge on the purchase of Class A shares of each
of  the  Oppenheimer  funds  except  the  money  market  funds.   Under  certain
circumstances described in this Statement of Additional Information,  redemption
proceeds of certain  money  market  fund  shares may be subject to a  contingent
deferred sales charge.

Letters of Intent.  Under a Letter of Intent,  if you purchase Class A shares or
Class A and  Class B shares  of the Fund and other  Oppenheimer  funds  during a
13-month  period,  you can reduce  the sales  charge  rate that  applies to your
purchases of Class A shares. The total amount of your intended purchases of both
Class A and Class B shares will  determine the reduced sales charge rate for the
Class A shares purchased during that period.  You can include  purchases made up
to 90 days before the date of the Letter.

      A  Letter  of  Intent  is  an  investor's  statement  in  writing  to  the
Distributor  of the intention to purchase  Class A shares or Class A and Class B
shares of the Fund (and other  Oppenheimer  funds) during a 13-month period (the
"Letter  of  Intent  period").  At the  investor's  request,  this  may  include
purchases made up to 90 days prior to the date of the Letter.  The Letter states
the  investor's  intention to make the  aggregate  amount of purchases of shares
which,  when added to the  investor's  holdings of shares of those  funds,  will
equal  or  exceed  the  amount  specified  in  the  Letter.  Purchases  made  by
reinvestment of dividends or  distributions  of capital gains and purchases made
at net asset value  without  sales  charge do not count  toward  satisfying  the
amount of the Letter.

      A Letter  enables  an  investor  to count  the  Class A and Class B shares
purchased  under the Letter to obtain the reduced sales charge rate on purchases
of Class A shares of the Fund (and other  Oppenheimer  funds) that applies under
the Right of Accumulation to current purchases of Class A shares.  Each purchase
of Class A shares  under the Letter  will be made at the public  offering  price
(including  the sales  charge)  that  applies to a single  lump-sum  purchase of
shares in the amount intended to be purchased under the Letter.

      In  submitting a Letter,  the  investor  makes no  commitment  to purchase
shares.  However,  if the  investor's  purchases of shares  within the Letter of
Intent  period,  when added to the value (at offering  price) of the  investor's
holdings  of shares on the last day of that  period,  do not equal or exceed the
intended  purchase amount,  the investor agrees to pay the additional  amount of
sales charge applicable to such purchases. That amount is described in "Terms of
Escrow,"  below  (those  terms may be  amended by the  Distributor  from time to
time).  The  investor  agrees that shares  equal in value to 5% of the  intended
purchase  amount  will be held in escrow by the  Transfer  Agent  subject to the
Terms of  Escrow.  Also,  the  investor  agrees  to be bound by the terms of the
Prospectus,  this Statement of Additional  Information and the Application  used
for a Letter of Intent. If those terms are amended,  as they may be from time to
time by the Fund,  the  investor  agrees to be bounded by the amended  terms and
that those amendments will apply automatically to existing Letters of Intent.

      If the total eligible purchases made during the Letter of Intent period do
not equal or exceed the intended  purchase  amount,  the commissions  previously
paid to the dealer of record  for the  account  and the  amount of sales  charge
retained by the Distributor  will be adjusted to the rates  applicable to actual
total purchases.  If total eligible purchases during the Letter of Intent period
exceed the intended  purchase amount and exceed the amount needed to qualify for
the next sales  charge rate  reduction  set forth in the  Prospectus,  the sales
charges paid will be adjusted to the lower rate.  That  adjustment  will be made
only if and when the dealer returns to the  Distributor the excess of the amount
of commissions allowed or paid to the dealer over the amount of commissions that
apply to the actual amount of purchases.  The excess commissions returned to the
Distributor  will be used  to  purchase  additional  shares  for the  investor's
account at the net asset value per share in effect on the date of such purchase,
promptly after the Distributor's receipt thereof.

      In determining  the total amount of purchases made under a Letter,  shares
redeemed by the investor prior to the termination of the Letter of Intent period
will be deducted.  It is the  responsibility  of the dealer of record and/or the
investor  to advise the  Distributor  about the Letter in placing  any  purchase
orders  for the  investor  during  the  Letter  of  Intent  period.  All of such
purchases must be made through the Distributor.

      Terms of Escrow That Apply to Letters of Intent.

      1. Out of the initial purchase (or subsequent purchases if necessary) made
pursuant to a Letter, shares of the Fund equal in value up to 5% of the intended
purchase amount  specified in the Letter shall be held in escrow by the Transfer
Agent. For example, if the intended purchase amount is $50,000, the escrow shall
be shares valued in the amount of $2,500  (computed at the public offering price
adjusted for a $50,000 purchase).  Any dividends and capital gains distributions
on the escrowed shares will be credited to the investor's account.
      2. If the total minimum investment specified under the Letter is completed
within the  thirteen-month  Letter of Intent period, the escrowed shares will be
promptly released to the investor.

      3. If, at the end of the thirteen-month  Letter of Intent period the total
purchases  pursuant  to the Letter are less than the  intended  purchase  amount
specified in the Letter,  the investor must remit to the  Distributor  an amount
equal to the difference between the dollar amount of sales charges actually paid
and the amount of sales  charges  which would have been paid if the total amount
purchased  had been made at a single  time.  That sales charge  adjustment  will
apply to any shares  redeemed  prior to the  completion  of the  Letter.  If the
difference  in sales charges is not paid within twenty days after a request from
the Distributor or the dealer,  the Distributor  will,  within sixty days of the
expiration  of the Letter,  redeem the number of escrowed  shares  necessary  to
realize such difference in sales charges.  Full and fractional  shares remaining
after such redemption will be released from escrow.  If a request is received to
redeem escrowed shares prior to the payment of such additional sales charge, the
sales charge will be withheld from the redemption proceeds.

      4. By  signing  the  Letter,  the  investor  irrevocably  constitutes  and
appoints the Transfer Agent as  attorney-in-fact to surrender for redemption any
or all escrowed shares.

5.        The shares  eligible for purchase  under the Letter (or the holding of
          which may be counted toward completion of a Letter) include:
(a)          Class A shares sold with a front-end  sales  charge or subject to a
             Class A contingent deferred sales charge,
(b)          Class B shares of other  Oppenheimer  funds acquired  subject to a
             contingent deferred sales charge, and
(c)          Class A or Class B shares  acquired by exchange of either (1) Class
             A shares of one of the other  Oppenheimer  funds that were acquired
             subject to a Class A initial or contingent deferred sales charge or
             (2) Class B shares of one of the other  Oppenheimer funds that were
             acquired subject to a contingent deferred sales charge.

      6. Shares held in escrow  hereunder  will  automatically  be exchanged for
shares of another  fund to which an exchange is  requested,  as described in the
section of the Prospectus  entitled "How to Exchange Shares" and the escrow will
be transferred to that other fund.

Asset Builder Plans.  To establish an Asset Builder Plan to buy shares  directly
from a bank  account,  you must  enclose a check  (the  minimum  is $25) for the
initial purchase with your  application.  Shares purchased by Asset Builder Plan
payments  from bank  accounts  are subject to the  redemption  restrictions  for
recent purchases described in the Prospectus.  Asset Builder Plans are available
if your bank is an ACH member. Asset Builder Plans may not be used to buy shares
for OppenheimerFunds  employer-sponsored  qualified  retirement accounts.  Asset
Builder Plans also enable shareholders of Oppenheimer Cash Reserves to use their
fund account to make monthly  automatic  purchases of shares of up to four other
Oppenheimer funds.

      If you make  payments  from your bank  account to  purchase  shares of the
Fund, your bank account will be debited  automatically.  Normally the debit will
be made two days prior to the investment dates you selected on your Application.
Neither the  Distributor,  the Transfer  Agent nor the Fund shall be responsible
for any delays in purchasing shares resulting from delays in ACH transmission.

      Before  you  establish  Asset  Builder  payments,   you  should  obtain  a
prospectus  of  the  selected  fund(s)  from  your  financial  advisor  (or  the
Distributor)  and request an  application  from the  Distributor.  Complete  the
application  and return  it.  You may  change  the amount of your Asset  Builder
payment or you can terminate these automatic  investments at any time by writing
to  the  Transfer  Agent.  The  Transfer  Agent  requires  a  reasonable  period
(approximately  10 days) after receipt of your  instructions  to implement them.
The Fund reserves the right to amend,  suspend,  or  discontinue  offering Asset
Builder plans at any time without prior notice.

Cancellation of Purchase Orders.  Cancellation of purchase orders for the Fund's
shares (for  example,  when a purchase  check is  returned  to the Fund  unpaid)
causes a loss to be incurred  when the net asset  value of the Fund's  shares on
the  cancellation  date is less than on the purchase date. That loss is equal to
the amount of the  decline in the net asset  value per share  multiplied  by the
number of shares in the purchase  order.  The investor is  responsible  for that
loss. If the investor fails to compensate the Fund for the loss, the Distributor
will do so. The Fund may reimburse the  Distributor for that amount by redeeming
shares from any account  registered in that investor's  name, or the Fund or the
Distributor may seek other redress.

Classes of Shares.  Each class of shares of the Fund  represents  an interest in
the same portfolio of investments of the Fund. However, each class has different
shareholder  privileges and features.  The net income attributable to Class B or
Class C shares and the  dividends  payable on Class B or Class C shares  will be
reduced by  incremental  expenses  borne  solely by that class.  Those  expenses
include the asset-based sales charges to which Class B and Class C are subject.

      The  availability of three classes of shares permits an investor to choose
the method of purchasing shares that is more appropriate for the investor.  That
may  depend  on the  amount of the  purchase,  the  length of time the  investor
expects to hold  shares,  and other  relevant  circumstances.  Class A shares in
general are sold subject to an initial sales  charge.  While Class B and Class C
shares have no initial  sales charge,  the purpose of the deferred  sales charge
and  asset-based  sales charge on Class B and Class C shares is the same as that
of the initial sales charge on Class A shares to compensate the  Distributor and
brokers,  dealers and  financial  institutions  that sell shares of the Fund.  A
salesperson who is entitled to receive  compensation for selling Fund shares may
receive  different  levels of  compensation  for  selling to one class of shares
rather than another.

      The  Distributor  will not accept any order in the amount of  $500,000  or
more for Class B shares or $1  million or more for Class C shares on behalf of a
single investor (not including dealer "street name" or omnibus  accounts).  That
is because  generally it will be more advantageous for that investor to purchase
Class A shares of the Fund.

      Class B  Conversion.  The  conversion  of Class B shares to Class A shares
after six years is subject to the  continuing  availability  of a private letter
ruling  from the  Internal  Revenue  Service,  or an  opinion  of counsel or tax
adviser, to the effect that the conversion of Class B shares does not constitute
a taxable event for the holder under  federal  income tax law. If such a revenue
ruling or opinion is no longer available,  the automatic  conversion feature may
be  suspended,  in which event no further  conversions  of Class B shares  would
occur while such  suspension  remained in effect.  Although Class B shares could
then be exchanged for Class A shares on the basis of relative net asset value of
the two classes,  without the imposition of a sales charge or fee, such exchange
could constitute a taxable event for the holder, and absent such exchange, Class
B shares might continue to be subject to the asset-based sales charge for longer
than six years.

      Allocation  of  Expenses.  The Fund  pays  expenses  related  to its daily
operations,  such as custodian fees, trustees' fees, transfer agency fees, legal
fees and auditing  costs.  Those  expenses are paid out of the Fund's assets and
are not paid directly by  shareholders.  However,  those expenses reduce the net
asset  value of shares,  and  therefore  are  indirectly  borne by  shareholders
through their investment.

      The  methodology  for  calculating  the net  asset  value,  dividends  and
distributions  of the Fund's  share  classes  recognizes  two types of expenses.
General expenses that do not pertain specifically to any one class are allocated
pro rata to the shares of all classes. The allocation is based on the percentage
of the Fund's total assets that is represented by the assets of each class,  and
then  equally to each  outstanding  share  within a given  class.  Such  general
expenses include  management fees, legal,  bookkeeping and audit fees,  printing
and mailing costs of shareholder reports, Prospectuses, Statements of Additional
Information and other materials for current  shareholders,  fees to unaffiliated
Trustees,  custodian expenses,  share issuance costs,  organization and start-up
costs, interest,  taxes and brokerage commissions,  and non-recurring  expenses,
such as litigation costs.

      Other expenses that are directly  attributable  to a particular  class are
allocated equally to each outstanding share within that class.  Examples of such
expenses  include  distribution  and service  plan  (12b-1)  fees,  transfer and
shareholder  servicing  agent fees and  expenses,  share  registration  fees and
shareholder meeting expenses (to the extent that such expenses pertain only to a
specific class).

Determination  of Net Asset Values Per Share.  The net asset values per share of
each class of shares of the Fund are  determined  as of the close of business of
The New York Stock Exchange on each day that the Exchange is open. It is done by
dividing  the value of the Fund's net assets  attributable  to that class by the
number of shares of that  class  that are  outstanding.  The  Exchange  normally
closes at 4:00  P.M.,  New York time,  but may close  earlier on some other days
(for example,  in case of weather  emergencies  or on days falling before a U.S.
holiday).  The Exchange's most recent annual  announcement  (which is subject to
change)  states that it will close on New Year's Day,  Martin  Luther King,  Jr.
Day,  Presidents' Day, Good Friday,  Memorial Day,  Independence Day, Labor Day,
Thanksgiving Day and Christmas Day. It may also close on other days.

      Dealers  other than  Exchange  members  may conduct  trading in  municipal
securities on days on which the Exchange is closed (including  weekends and U.S.
holidays) or after 4:00 P.M. on a regular  business day.  Because the Fund's net
asset values will not be calculated  on those days,  the Fund's net asset values
per share may be significantly  affected on such days when  shareholders may not
purchase or redeem shares.

     Securities  Valuation.   The  Fund's  Board  of  Trustees  has  established
procedures  for  the  valuation  of the  Fund's  securities.  In  general  those
procedures are as follows:

         Long-term debt securities  having a remaining  maturity in excess of 60
         days are valued based on the mean between the "bid" and "asked"  prices
         determined by a portfolio  pricing service approved by the Fund's Board
         of Trustees or obtained by the Manager from two active market makers in
         the security on the basis of reasonable inquiry.


         The following  securities  are valued at the mean between the "bid" and
         "asked" prices  determined by a pricing service  approved by the Fund's
         Board of Trustees or  obtained  by the Manager  from two active  market
         makers in the security on the basis of reasonable inquiry:
(1) debt instruments that have a maturity of more than 397 days when issued,

(2) debt  instruments  that had a maturity  of 397 days or less when  issued and
have a remaining maturity of more than 60 days, and

(3) non-money  market debt  instruments  that had a maturity of 397 days or less
when issued and which have a remaining maturity of 60 days or less.

The  following  securities  are valued at cost,  adjusted  for  amortization  of
premiums and accretion of discounts:
(1)         money market debt  securities  held by a non-money  market fund that
            had a  maturity  of less  than  397 days  when  issued  that  have a
            remaining maturity of 60 days or less, and
(2)         debt  instruments  held by a money market fund that have a remaining
            maturity of 397 days or less.

         Securities not having readily-available market quotations are valued at
         fair value determined under the Board's procedures.

      If the  Manager  is unable to locate  two  market  makers  willing to give
quotes,  a  security  may be priced at the mean  between  the "bid" and  "asked"
prices  provided by a single  active market maker (which in certain cases may be
the "bid" price if no "asked" price is available).

      In the case of municipal  securities,  when last sale  information  is not
generally available,  the Manager may use pricing services approved by the Board
of Trustees.  The pricing service may use "matrix" comparisons to the prices for
comparable instruments on the basis of quality,  yield, maturity.  Other special
factors may be involved (such as the  tax-exempt  status of the interest paid by
municipal  securities).  The Manager  will  monitor the  accuracy of the pricing
services.  That  monitoring  may include  comparing  prices  used for  portfolio
valuation to actual sales prices of selected securities.

      Puts,  calls,  interest rate futures and municipal  bond index futures are
valued at the last sale price on the principal exchange on which they are traded
or on NASDAQ, as applicable,  as determined by a pricing service approved by the
Board of Trustees or by the Manager. If there were no sales that day, they shall
be valued at the last sale price on the  preceding  trading  day if it is within
the spread of the closing "bid" and "asked" prices on the principal  exchange or
on NASDAQ on the  valuation  date.  If not,  the value  shall be the closing bid
price on the principal  exchange or on NASDAQ on the valuation date. If the put,
call or future is not traded on an exchange or on NASDAQ,  it shall be valued by
the mean  between  "bid" and "asked"  prices  obtained  by the Manager  from two
active  market  makers.  In certain  cases that may be at the "bid"  price if no
"asked" price is available.

      When the Fund writes an option, an amount equal to the premium received is
included  in the Fund's  Statement  of Assets and  Liabilities  as an asset.  An
equivalent credit is included in the liability  section.  The credit is adjusted
("marked-to-market")  to reflect the  current  market  value of the  option.  In
determining the Fund's gain on investments, if a call or put written by the Fund
is exercised,  the proceeds are increased by the premium received.  If a call or
put  written  by the Fund  expires,  the Fund  has a gain in the  amount  of the
premium. If the Fund enters into a closing purchase transaction,  it will have a
gain or loss,  depending  on whether the premium  received was more or less than
the cost of the closing  transaction.  If the Fund exercises a put it holds, the
amount the Fund receives on its sale of the underlying  investment is reduced by
the amount of premium paid by the Fund.

            How to Sell Shares

      The information  below  supplements the terms and conditions for redeeming
shares set forth in the Prospectus.

Checkwriting.  When a check is presented to the Fund's bank for  clearance,  the
bank will ask the Fund to  redeem a  sufficient  number  of full and  fractional
shares in the  shareholder's  account  to cover the  amount of the  check.  This
enables the  shareholder to continue to receive  dividends on those shares until
the check is presented to the Fund.  Checks may not be presented  for payment at
the  offices of the bank  listed on the check or at the Fund's  custodian  bank.
That limitation does not affect the use of checks for the payment of bills or to
obtain cash at other banks.  The Fund  reserves  the right to amend,  suspend or
discontinue offering Checkwriting privileges at any time without prior notice.

      In choosing to take advantage of the Checkwriting privilege by signing the
Account  Application or by completing a Checkwriting  card,  each individual who
signs:
(1)       for individual  accounts,  represents that they are the registered
          owner(s) of the shares of the Fund in that account;
(2)      for accounts for corporations, partnerships, trusts and other entities,
         represents that they are an officer,  general partner, trustee or other
         fiduciary or agent, as applicable,  duly authorized to act on behalf of
         such registered owner(s);
(3)      authorizes  the Fund, its Transfer Agent and any bank through which the
         Fund's drafts  (checks) are payable to pay all checks drawn on the Fund
         account of such  person(s) and to redeem a sufficient  amount of shares
         from that account to cover payment of each check;
(4)      specifically  acknowledges  that if they choose to permit  checks to be
         honored if there is a single  signature on checks drawn  against  joint
         accounts, or accounts for corporations,  partnerships,  trusts or other
         entities,  the  signature  of any  one  signatory  on a  check  will be
         sufficient to authorize  payment of that check and redemption  from the
         account,  even if that account is  registered in the names of more than
         one  person  or more  than  one  authorized  signature  appears  on the
         Checkwriting card or the Application, as applicable;
(5)       understands  that the  Checkwriting  privilege  may be  terminated  or
          amended at any time by the Fund and/or the Fund's bank; and
(6)      acknowledges  and agrees that neither the Fund nor its bank shall incur
         any  liability  for  that  amendment  or  termination  of  checkwriting
         privileges or for redeeming shares to pay checks reasonably believed by
         them to be genuine, or for returning or not paying checks that have not
         been accepted for any reason.

Reinvestment  Privilege.  Within six months of a redemption,  a shareholder  may
reinvest all or part of the redemption proceeds of :

           Class A shares that you purchased  subject to an initial sales charge
           or Class A shares on which a  contingent  deferred  sales  charge was
           paid,  or Class B shares that were  subject to the Class B contingent
           deferred sales charge when redeemed.

      The  reinvestment  may be made without sales charge only in Class A shares
of the Fund or any of the other  Oppenheimer funds into which shares of the Fund
are  exchangeable as described in "How to Exchange  Shares" below.  Reinvestment
will be at the net asset value next computed  after the Transfer  Agent receives
the  reinvestment  order.  The shareholder  must ask the Transfer Agent for that
privilege at the time of reinvestment.  This privilege does not apply to Class C
shares.  The  Fund  may  amend,  suspend  or cease  offering  this  reinvestment
privilege at any time as to shares  redeemed  after the date of such  amendment,
suspension or cessation.

      Any  capital  gain that was  realized  when the shares  were  redeemed  is
taxable,  and reinvestment  will not alter any capital gains tax payable on that
gain.  If there has been a capital  loss on the  redemption,  some or all of the
loss may not be tax  deductible,  depending  on the  timing  and  amount  of the
reinvestment.  Under the Internal  Revenue Code, if the  redemption  proceeds of
Fund  shares on which a sales  charge was paid are  reinvested  in shares of the
Fund or another of the Oppenheimer  funds within 90 days of payment of the sales
charge, the shareholder's basis in the shares of the Fund that were redeemed may
not include the amount of the sales charge  paid.  That would reduce the loss or
increase the gain  recognized  from the  redemption.  However,  in that case the
sales  charge  would  be  added  to the  basis  of the  shares  acquired  by the
reinvestment of the redemption proceeds.

Payments "In Kind".  The Prospectus  states that payment for shares tendered for
redemption is  ordinarily  made in cash.  However,  the Board of Trustees of the
Fund may determine  that it would be  detrimental  to the best  interests of the
remaining  shareholders of the Fund to make payment of a redemption order wholly
or partly in cash.  In that case,  the Fund may pay the  redemption  proceeds in
whole or in part by a  distribution  "in  kind" of  liquid  securities  from the
portfolio of the Fund, in lieu of cash.

      The Fund has elected to be  governed  by Rule 18f-1  under the  Investment
Company Act.  Under that rule,  the Fund is obligated to redeem shares solely in
cash up to the lesser of $250,000 or 1% of the net assets of the Fund during any
90-day  period for any one  shareholder.  If shares are  redeemed  in kind,  the
redeeming  shareholder  might  incur  brokerage  or other  costs in selling  the
securities for cash. The Fund will value  securities  used to pay redemptions in
kind  using the same  method  the Fund uses to value  its  portfolio  securities
described  above  under  "Determination  of Net Asset  Values Per  Share."  That
valuation will be made as of the time the redemption price is determined.

Involuntary Redemptions. The Fund's Board of Trustees has the right to cause the
involuntary  redemption  of the shares held in any account if the  aggregate net
asset value of those shares is less than $200 or such lesser amount as the Board
may fix.  The Board of Trustees  will not cause the  involuntary  redemption  of
shares in an account if the  aggregate net asset value of such shares has fallen
below the stated minimum solely as a result of market fluctuations. If the Board
exercises  this  right,  it may also fix the  requirements  for any notice to be
given to the  shareholders  in question  (not less than 30 days).  The Board may
alternatively  set  requirements for the shareholder to increase the investment,
or set other terms and conditions so that the shares would not be  involuntarily
redeemed.

Transfers of Shares. A transfer of shares to a different  registration is not an
event that  triggers  the payment of sales  charges.  Therefore,  shares are not
subject to the payment of a contingent deferred sales charge of any class at the
time of  transfer  to the name of another  person or entity.  It does not matter
whether the transfer occurs by absolute assignment,  gift or bequest, as long as
it does not involve,  directly or indirectly,  a public sale of the shares. When
shares  subject to a  contingent  deferred  sales  charge are  transferred,  the
transferred shares will remain subject to the contingent  deferred sales charge.
It  will  be  calculated  as if the  transferee  shareholder  had  acquired  the
transferred  shares in the same manner and at the same time as the  transferring
shareholder.

      If less than all shares held in an account are  transferred,  and some but
not all shares in the account  would be subject to a contingent  deferred  sales
charge if redeemed at the time of  transfer,  the  priorities  described  in the
Prospectus  under "How to Buy Shares" for the imposition of the Class B or Class
C contingent  deferred sales charge will be followed in determining the order in
which shares are transferred.

Special  Arrangements  for  Repurchase  of Shares from Dealers and Brokers.  The
Distributor is the Fund's agent to repurchase its shares from authorized dealers
or brokers  on behalf of their  customers.  Shareholders  should  contact  their
broker or dealer to arrange this type of redemption.  The  repurchase  price per
share will be the net asset value next computed after the  Distributor  receives
an order placed by the dealer or broker.  However, if the Distributor receives a
repurchase  order from a dealer or broker  after the close of The New York Stock
Exchange on a regular business day, it will be processed at that day's net asset
value if the order was received by the dealer or broker from its customers prior
to the time the Exchange closes. Normally, the Exchange closes at 4:00 P.M., but
may do so  earlier  on  some  days.  Additionally,  the  order  must  have  been
transmitted  to and received by the  Distributor  prior to its close of business
that day (normally 5:00 P.M.).

      Ordinarily, for accounts redeemed by a broker-dealer under this procedure,
payment  will be made  within  three  business  days after the shares  have been
redeemed upon the Distributor's  receipt of the required redemption documents in
proper  form.  The  signature(s)  of the  registered  owners  on the  redemption
documents must be guaranteed as described in the Prospectus.

Automatic  Withdrawal and Exchange  Plans.  Investors  owning shares of the Fund
valued at $5,000  or more can  authorize  the  Transfer  Agent to redeem  shares
(having  a  value  of at  least  $50)  automatically  on a  monthly,  quarterly,
semi-annual or annual basis under an Automatic  Withdrawal Plan.  Shares will be
redeemed three business days prior to the date requested by the  shareholder for
receipt of the payment.  Automatic  withdrawals of up to $1,500 per month may be
requested  by  telephone  if  payments  are to be made by check  payable  to all
shareholders of record.  Payments must also be sent to the address of record for
the account and the address must not have been changed within the prior 30 days.
Required minimum distributions from OppenheimerFunds-sponsored  retirement plans
may not be arranged on this basis.

      Payments are normally made by check, but shareholders  having  AccountLink
privileges  (see "How To Buy Shares") may arrange to have  Automatic  Withdrawal
Plan  payments  transferred  to the  bank  account  designated  on  the  Account
Application or by signature-guaranteed  instructions sent to the Transfer Agent.
Shares are  normally  redeemed  pursuant to an Automatic  Withdrawal  Plan three
business  days  before the  payment  transmittal  date you select in the Account
Application.  If a contingent  deferred sales charge applies to the  redemption,
the amount of the check or payment will be reduced accordingly.

      The Fund cannot guarantee receipt of a payment on the date requested.  The
Fund reserves the right to amend, suspend or discontinue offering these plans at
any time without prior notice.  Because of the sales charge  assessed on Class A
share purchases,  shareholders  should not make regular additional Class A share
purchases while participating in an Automatic Withdrawal Plan. Class B and Class
C shareholders should not establish  withdrawal plans, because of the imposition
of the contingent  deferred sales charge on such  withdrawals  (except where the
contingent  deferred  sales charge is waived as described in "Waivers of Class B
and Class C Sales Charges" below).

      By requesting an Automatic  Withdrawal or Exchange Plan,  the  shareholder
agrees to the terms and  conditions  that apply to such plans,  as stated below.
These  provisions  may be  amended  from  time to time by the  Fund  and/or  the
Distributor.  When adopted,  any amendments will automatically apply to existing
Plans.

      Automatic Exchange Plans. Shareholders can authorize the Transfer Agent to
exchange a  pre-determined  amount of shares of the Fund for shares (of the same
class)  of  other  Oppenheimer  funds  automatically  on a  monthly,  quarterly,
semi-annual or annual basis under an Automatic Exchange Plan. The minimum amount
that may be exchanged to each other fund account is $25.  Instructions should be
provided   on   the   OppenheimerFunds   Application   or   signature-guaranteed
instructions.  Exchanges made under these plans are subject to the  restrictions
that  apply  to  exchanges  as set  forth  in "How to  Exchange  Shares"  in the
Prospectus and below in this Statement of Additional Information.

      Automatic  Withdrawal  Plans. Fund shares will be redeemed as necessary to
  meet  withdrawal  payments.  Shares  acquired  without a sales  charge will be
  redeemed first.  Shares  acquired with reinvested  dividends and capital gains
  distributions will be redeemed next,  followed by shares acquired with a sales
  charge,  to the extent necessary to make withdrawal  payments.  Depending upon
  the amount withdrawn, the investor's principal may be depleted.  Payments made
  under  these  plans  should  not be  considered  as a yield or  income on your
  investment.

      The Transfer Agent will  administer the  investor's  Automatic  Withdrawal
Plan as agent for the  shareholder(s)  (the  "Planholder") who executed the Plan
authorization and application  submitted to the Transfer Agent. Neither the Fund
nor the  Transfer  Agent shall incur any  liability  to the  Planholder  for any
action taken or not taken by the Transfer  Agent in good faith to administer the
Plan. Share certificates will not be issued for shares of the Fund purchased for
and held under the Plan,  but the Transfer  Agent will credit all such shares to
the account of the Planholder on the records of the Fund. Any share certificates
held by a Planholder  may be  surrendered  unendorsed to the Transfer Agent with
the Plan  application so that the shares  represented by the  certificate may be
held under the Plan.

      For  accounts  subject to Automatic  Withdrawal  Plans,  distributions  of
capital gains must be  reinvested  in shares of the Fund,  which will be done at
net asset value without a sales charge.  Dividends on shares held in the account
may be paid in cash or reinvested.

      Shares will be redeemed to make withdrawal payments at the net asset value
per share  determined on the redemption  date.  Checks or  AccountLink  payments
representing the proceeds of Plan withdrawals will normally be transmitted three
business days prior to the date  selected for receipt of the payment,  according
to the choice specified in writing by the Planholder.  Receipt of payment on the
date selected cannot be guaranteed.

      The amount and the  interval of  disbursement  payments and the address to
which  checks  are to be mailed or  AccountLink  payments  are to be sent may be
changed at any time by the  Planholder  by writing to the  Transfer  Agent.  The
Planholder should allow at least two weeks' time after mailing such notification
for the requested  change to be put in effect.  The Planholder may, at any time,
instruct the Transfer Agent by written notice to redeem all, or any part of, the
shares held under the Plan.  That  notice  must be in proper form in  accordance
with the requirements of the then-current  Prospectus of the Fund. In that case,
the Transfer  Agent will redeem the number of shares  requested at the net asset
value  per  share  in  effect  and will  mail a check  for the  proceeds  to the
Planholder.

      The Planholder may terminate a Plan at any time by writing to the Transfer
Agent.  The Fund may also give  directions to the Transfer  Agent to terminate a
Plan. The Transfer Agent will also terminate a Plan upon its receipt of evidence
satisfactory  to it that the  Planholder  has died or is legally  incapacitated.
Upon  termination of a Plan by the Transfer Agent or the Fund,  shares that have
not  been  redeemed  will  be  held in  uncertificated  form in the  name of the
Planholder. The account will continue as a dividend-reinvestment, uncertificated
account unless and until proper  instructions  are received from the Planholder,
his or her executor or guardian, or another authorized person.

      To use shares held under the Plan as collateral for a debt, the Planholder
may  request  issuance  of a portion of the shares in  certificated  form.  Upon
written  request from the  Planholder,  the Transfer  Agent will  determine  the
number of shares  for which a  certificate  may be issued  without  causing  the
withdrawal checks to stop.  However,  should such  uncertificated  shares become
exhausted, Plan withdrawals will terminate.

      If the Transfer  Agent ceases to act as transfer  agent for the Fund,  the
Planholder will be deemed to have appointed any successor  transfer agent to act
as agent in administering the Plan.

            How to Exchange Shares

      As stated in the Prospectus,  shares of a particular  class of Oppenheimer
funds having more than one class of shares may be  exchanged  only for shares of
the same class of other Oppenheimer funds. Shares of Oppenheimer funds that have
a single class without a class  designation are deemed "Class A" shares for this
purpose.  You can obtain a current list showing  which funds offer which classes
by calling the Distributor at 1-800-525-7048.

      All of the  Oppenheimer  funds  currently  offer  Class  A, B and C shares
      except Oppenheimer Money Market Fund, Inc., Centennial Money Market Trust,
      Centennial Tax Exempt Trust,  Centennial Government Trust,  Centennial New
      York Tax  Exempt  Trust,  Centennial  California  Tax  Exempt  Trust,  and
      Centennial   America  Fund,   L.P.,  which  only  offer  Class  A  shares.
      Oppenheimer  Main Street  California  Municipal Fund currently offers only
      Class A and Class B shares.
      Class B and Class C shares of  Oppenheimer  Cash  Reserves  are  generally
      available  only by  exchange  from  the  same  class  of  shares  of other
      Oppenheimer funds or through OppenheimerFunds-sponsored 401(k) plans. Only
      certain  Oppenheimer funds currently offer Class Y shares.  Class Y shares
      of  Oppenheimer  Real  Asset Fund may not be  exchanged  for shares of any
      other fund.
      Class M shares of Oppenheimer Convertible Securities Fund may be exchanged
      only  for  Class A  shares  of other  Oppenheimer  funds.  They may not be
      acquired by exchange of shares of any class of any other Oppenheimer funds
      except Class A shares of Oppenheimer Money Market Fund or Oppenheimer Cash
      Reserves acquired by exchange of Class M shares.
      Class A shares of Senior  Floating Rate Fund are not available by exchange
      of Class A shares  of other  Oppenheimer  funds.  Class A shares of Senior
      Floating Rate Fund that are exchanged for shares of the other  Oppenheimer
      funds may not be exchanged back for Class A shares of Senior Floating Rate
      Fund.  Class X shares  of  Limited  Term New  York  Municipal  Fund can be
      exchanged  only for  Class B  shares  of other  Oppenheimer  funds  and no
      exchanges may be made to Class X shares.
      Shares of Oppenheimer  Capital  Preservation Fund may not be exchanged for
      shares of Oppenheimer  Money Market Fund, Inc.,  Oppenheimer Cash Reserves
      or Oppenheimer  Limited-Term Government Fund. Only participants in certain
      retirement plans may purchase shares of Oppenheimer  Capital  Preservation
      Fund, and only those participants may exchange shares of other Oppenheimer
      funds for shares of Oppenheimer Capital Preservation Fund.

      Class A shares of  Oppenheimer  funds may be  exchanged at net asset value
for shares of any money  market fund offered by the  Distributor.  Shares of any
money market fund  purchased  without a sales charge may be exchanged for shares
of  Oppenheimer  funds  offered  with a sales  charge upon  payment of the sales
charge. They may also be used to purchase shares of Oppenheimer funds subject to
an early withdrawal charge or contingent deferred sales charge.

      Shares  of  Oppenheimer  Money  Market  Fund,  Inc.   purchased  with  the
redemption proceeds of shares of other mutual funds (other than funds managed by
the  Manager  or its  subsidiaries)  redeemed  within  the 30 days prior to that
purchase may  subsequently  be exchanged for shares of other  Oppenheimer  funds
without being subject to an initial  sales charge or contingent  deferred  sales
charge.  To qualify for that  privilege,  the investor or the investor's  dealer
must notify the  Distributor of  eligibility  for this privilege at the time the
shares of Oppenheimer Money Market Fund, Inc. are purchased. If requested,  they
must supply proof of entitlement to this privilege.

      Shares of the Fund acquired by reinvestment of dividends or  distributions
from any of the other  Oppenheimer  funds or from any unit investment  trust for
which  reinvestment  arrangements  have been made  with the  Distributor  may be
exchanged at net asset value for shares of any of the Oppenheimer funds.

      How Exchanges  Affect  Contingent  Deferred Sales  Charges.  No contingent
deferred  sales charge is imposed on exchanges of shares of any class  purchased
subject to a contingent  deferred  sales  charge.  However,  when Class A shares
acquired  by  exchange of Class A shares of other  Oppenheimer  funds  purchased
subject to a Class A contingent  deferred  sales  charge are redeemed  within 18
months of the end of the calendar month of the initial purchase of the exchanged
Class A shares,  the Class A contingent  deferred sales charge is imposed on the
redeemed  shares.  The Class B  contingent  deferred  sales charge is imposed on
Class B shares  acquired by exchange if they are redeemed  within 6 years of the
initial  purchase  of the  exchanged  Class B  shares.  The  Class C  contingent
deferred sales charge is imposed on Class C shares  acquired by exchange if they
are redeemed  within 12 months of the initial  purchase of the exchanged Class C
shares.

      When Class B or Class C shares are  redeemed  to effect an  exchange,  the
priorities described in "How To Buy Shares" in the Prospectus for the imposition
of the Class B or the Class C contingent  deferred sales charge will be followed
in determining  the order in which the shares are exchanged.  Before  exchanging
shares,  shareholders  should take into  account how the exchange may affect any
contingent  deferred  sales  charge  that  might be  imposed  in the  subsequent
redemption  of remaining  shares.  Shareholders  owning  shares of more than one
Class must specify  whether they intend to exchange  Class A, Class B or Class C
shares.

      Limits on Multiple Exchange Orders.  The Fund reserves the right to reject
telephone or written exchange requests  submitted in bulk by anyone on behalf of
more than one account.  The Fund may accept  requests for  exchanges of up to 50
accounts per day from  representatives  of  authorized  dealers that qualify for
this privilege.

      Telephone  Exchange  Requests.  When  exchanging  shares by  telephone,  a
shareholder  must have an existing  account in the fund to which the exchange is
to be made.  Otherwise,  the  investors  must obtain a  Prospectus  of that fund
before the exchange request may be submitted.  For full or partial  exchanges of
an account made by telephone, any special account features such as Asset Builder
Plans and Automatic  Withdrawal Plans will be switched to the new account unless
the Transfer  Agent is instructed  otherwise.  If all  telephone  lines are busy
(which  might  occur,  for  example,   during  periods  of  substantial   market
fluctuations),  shareholders might not be able to request exchanges by telephone
and would have to submit written exchange requests.

      Processing  Exchange Requests.  Shares to be exchanged are redeemed on the
regular  business day the Transfer Agent receives an exchange  request in proper
form (the "Redemption  Date").  Normally,  shares of the fund to be acquired are
purchased on the  Redemption  Date,  but such purchases may be delayed by either
fund up to five business days if it determines that it would be disadvantaged by
an immediate transfer of the redemption  proceeds.  The Fund reserves the right,
in its discretion,  to refuse any exchange request that may disadvantage it. For
example,  if the  receipt of  multiple  exchange  requests  from a dealer  might
require the  disposition  of portfolio  securities  at a time or at a price that
might be disadvantageous to the Fund, the Fund may refuse the request.

      In connection with any exchange  request,  the number of shares  exchanged
may be less than the number  requested if the  exchange or the number  requested
would include  shares  subject to a restriction  cited in the Prospectus or this
Statement of Additional Information,  or would include shares covered by a share
certificate  that is not  tendered  with the request.  In those cases,  only the
shares available for exchange without restriction will be exchanged.

      The different  Oppenheimer  funds  available  for exchange have  different
investment objectives,  policies and risks. A shareholder should assure that the
fund selected is  appropriate  for his or her  investment and should be aware of
the tax  consequences  of an  exchange.  For  federal  income tax  purposes,  an
exchange  transaction  is  treated as a  redemption  of shares of one fund and a
purchase of shares of another.  "Reinvestment  Privilege," above, discusses some
of the tax  consequences of  reinvestment of redemption  proceeds in such cases.
The  Fund,  the  Distributor,  and the  Transfer  Agent are  unable  to  provide
investment,  tax or legal advice to a shareholder in connection with an exchange
request or any other investment transaction.

            Dividends and Taxes

Dividends and Distributions.  Dividends will be payable on shares held of record
at the time of the previous  determination  of net asset value,  or as otherwise
described in "How to Buy Shares."  Daily  dividends will not be declared or paid
on newly purchased  shares until such time as Federal Funds (funds credited to a
member  bank's  account at the  Federal  Reserve  Bank) are  available  from the
purchase  payment for such  shares.  Normally,  purchase  checks  received  from
investors  are  converted  to Federal  Funds on the next  business  day.  Shares
purchased through dealers or brokers normally are paid for by the third business
day following the placement of the purchase order.

      Shares  redeemed  through the regular  redemption  procedure  will be paid
dividends  through  and  including  the day on which the  redemption  request is
received by the  Transfer  Agent in proper form.  Dividends  will be declared on
shares  repurchased  by a dealer or broker for three business days following the
trade  date (that is, up to and  including  the day prior to  settlement  of the
repurchase).  If all shares in an account are redeemed, all dividends accrued on
shares  of the  same  class  in the  account  will be  paid  together  with  the
redemption proceeds.

      The Fund's  practice of attempting to pay dividends on Class A shares at a
constant  level  requires  the Manager to monitor the Fund's  portfolio  and, if
necessary, to select higher-yielding securities when it is deemed appropriate to
seek income at the level  needed to meet the target.  Those  securities  must be
within  the  Fund's  investment  parameters,  however.  The Fund  expects to pay
dividends  at a  targeted  level  from  its  net  investment  income  and  other
distributable income without any impact on the net asset values per share.

      Dividends, distributions and the proceeds of the redemption of Fund shares
represented  by checks  returned to the Transfer  Agent by the Postal Service as
undeliverable  will be invested in shares of Oppenheimer Money Market Fund, Inc.
Reinvestment  will be made as  promptly  as  possible  after the  return of such
checks  to the  Transfer  Agent,  to  enable  the  investor  to earn a return on
otherwise  idle funds.  Unclaimed  accounts may be subject to state  escheatment
laws, and the Fund and the Transfer Agent will not be liable to  shareholders or
their representatives for compliance with those laws in good faith.

      The amount of a distribution  paid on a class of shares may vary from time
to time depending on market conditions, the composition of the Fund's portfolio,
and expenses  borne by the Fund or borne  separately  by a class.  Dividends are
calculated  in the same manner,  at the same time and on the same day for shares
of each class. However,  dividends on Class B and Class C shares are expected to
be lower  than  dividends  on Class A shares.  That is due to the  effect of the
asset-based  sales charge on Class B and Class C shares.  Those  dividends  will
also  differ in amount as a  consequence  of any  difference  in net asset value
among Class A, Class B and Class C shares.

Tax  Status of the  Fund's  Dividends  and  Distributions.  The Fund  intends to
qualify  under  the  Internal  Revenue  Code  during  each  fiscal  year  to pay
"exempt-interest dividends" to its shareholders.  Exempt-interest dividends that
are  derived  from  net  investment  income  earned  by the  Fund  on  municipal
securities  will be  excludable  from gross income of  shareholders  for federal
income tax purposes.

      Net  investment  income  includes the allocation of amounts of income from
the  municipal  securities  in the Fund's  portfolio  that are free from federal
income  taxes.  This  allocation  will  be  made  by the  use of one  designated
percentage  applied uniformly to all income dividends paid during the Fund's tax
year.  That  designation  will normally be made following the end of each fiscal
year as to income  dividends  paid in the prior year.  The  percentage of income
designated as tax-exempt  may  substantially  differ from the  percentage of the
fund's income that was tax-exempt for a given period.

      A portion of the exempt-interest dividends paid by the Fund may be an item
of tax preference for shareholders  subject to the alternative  minimum tax. The
amount of any dividends attributable to tax preference items for purposes of the
alternative  minimum tax will be identified  when tax information is distributed
by the Fund.

      A shareholder receiving a dividend from income earned by the Fund from one
or more of the  following  sources  treats the  dividend  as a receipt of either
ordinary  income or long-term  capital gain in the  computation of gross income,
regardless of whether the dividend is reinvested:

(1) certain taxable temporary investments (such as certificates of deposit,
     repurchase  agreements,  commercial  paper  and  obligations  of  the  U.S.
     Government, its agencies and instrumentalities);
(2)   income from securities loans;
(3)   income or gains from options or futures; or
(4)       an excess of net  short-term  capital gain over net long-term  capital
          loss from the Fund.

      The  Fund's  dividends  will not be  eligible  for the  dividends-received
deduction for  corporations.  Shareholders  receiving  Social Security  benefits
should be aware  that  exempt-interest  dividends  are a factor  in  determining
whether such  benefits  are subject to federal  income tax.  Losses  realized by
shareholders  on the  redemption  of Fund  shares  within six months of purchase
(which period may be shortened by  regulation)  will be  disallowed  for federal
income tax purposes to the extent of exempt-interest  dividends received on such
shares.

      If the Fund  qualifies  as a  "regulated  investment  company"  under  the
Internal Revenue Code, it will not be liable for federal income taxes on amounts
paid by it as dividends and distributions.  That qualification  enables the Fund
to "pass through" its income and realized capital gains to shareholders  without
having to pay tax on them. The Fund qualified as a regulated  investment company
in its last fiscal year and intends to qualify in future years, but reserves the
right not to qualify.  The Internal  Revenue  Code  contains a number of complex
tests to  determine  whether the Fund  qualifies.  The Fund might not meet those
tests in a particular year. If it does not qualify, the Fund will be treated for
tax purposes as an ordinary  corporation  and will receive no tax  deduction for
payments of dividends and distributions made to shareholders.

      In any year in which the Fund qualifies as a regulated  investment company
under the Internal  Revenue Code,  the Fund will also be exempt from  California
corporate income and franchise taxes. It will also be qualified under California
law to pay  exempt  interest  dividends  that  will be  exempt  from  California
personal  income  tax.  That  exemption  applies to the  extent  that the Fund's
distributions  are attributable to interest on California  municipal  securities
and qualifying  obligations of the United States government,  if at least 50% of
the Fund's assets are invested in such  obligations at the close of each quarter
in its tax year. Distributions from the Fund attributable to income from sources
other than California municipal securities and U.S. government  obligations will
generally be subject to California income tax as ordinary income.

      Distributions by the Fund from investment  income and long- and short-term
capital  gains  will  generally  not  be  excludable   from  taxable  income  in
determining  California  corporate  franchise  tax or income  tax for  corporate
shareholders of the Fund. Additionally,  certain distributions paid to corporate
shareholders  of the Fund may be includable in income  subject to the California
alternative minimum tax.

      Under the Internal  Revenue  Code,  by December 31 each year the Fund must
distribute  98% of its taxable  investment  income earned from January 1 through
December  31 of that year and 98% of its  capital  gains  realized in the period
from November 1 of the prior year through  October 31 of the current year. If it
does not, the Fund must pay an excise tax on the amounts not distributed.  It is
presently  anticipated that the Fund will meet those requirements.  However, the
Fund's Board of Trustees and the Manager  might  determine in a particular  year
that it would be in the best interest of shareholders not to make  distributions
at the required levels and to pay the excise tax on the  undistributed  amounts.
That  would  reduce  the  amount  of  income  or  capital  gains  available  for
distribution to shareholders.

Dividend  Reinvestment  in Another Fund.  Shareholders  of the Fund may elect to
reinvest all dividends and/or capital gains  distributions in shares of the same
class of any of the other Oppenheimer  funds listed above.  Reinvestment will be
made at net  asset  value  without  sales  charge.  To elect  this  option,  the
shareholder  must notify the Transfer Agent in writing and must have an existing
account in the fund selected for  reinvestment.  Otherwise the shareholder  must
first obtain a  prospectus  for that fund and an  application  from the Transfer
Agent to  establish  an account.  The  investment  will be made at the net asset
value per share in effect at the close of business  on the  payable  date of the
dividend or  distribution.  Dividends and/or  distributions  from certain of the
other  Oppenheimer  funds  may be  invested  in  shares of this Fund on the same
basis.

            Additional Information About the Fund

The Transfer Agent. The Fund's Transfer Agent,  OppenheimerFunds  Services, is a
division  of  the  Manager.   It  is  responsible  for  maintaining  the  Fund's
shareholder  registry  and  shareholder   accounting  records,  and  for  paying
dividends  and  distributions  to  shareholders  of the  Fund.  It also  handles
shareholder servicing and administrative  functions.  It is paid on an "at-cost"
basis.

The Custodian.  Citibank,  N.A. is the custodian bank of the Fund's assets.  The
custodian  bank's  responsibilities  include  safeguarding  and  controlling the
Fund's portfolio securities, and handling the delivery of such securities to and
from the Fund.  It will be the  practice of the Fund to deal with the  custodian
bank in a manner uninfluenced by any banking relationship the custodian may have
with the Manager and its affiliates. The Fund's cash balances with the custodian
in excess of $100,000 are not  protected  by Federal  Deposit  Insurance.  Those
uninsured balances may at times be substantial.

Independent  Auditors.  KPMG LLP are the independent  auditors of the Fund. They
audit the Fund's financial  statements and perform other related audit services.
They also act as auditors for certain other funds advised by the Manager and its
affiliates.


<PAGE>


<PAGE>

--------------------------------------------------------------------------------
Independent Auditors' Report
--------------------------------------------------------------------------------


================================================================================
The Board of Trustees and Shareholders of
Oppenheimer California Municipal Fund:

We have audited the accompanying statement of assets and liabilities,  including
the statement of  investments,  of Oppenheimer  California  Municipal Fund as of
July 31, 1999, and the related  statement of operations for the year then ended,
the  statements  of changes in net assets for each of the years in the  two-year
period  then  ended and the  financial  highlights  for each of the years in the
three-year  period then ended,  the seven-month  period ended July 31, 1996, and
each of the  years  in the  two-year  period  ended  December  31,  1995.  These
financial  statements  and financial  highlights are the  responsibility  of the
Fund's  management.  Our  responsibility  is to  express  an  opinion  on  these
financial statements and financial highlights based on our audits.
               We conducted our audits in  accordance  with  generally  accepted
auditing  standards.  Those standards require that we plan and perform the audit
to obtain  reasonable  assurance  about  whether the  financial  statements  and
financial  highlights  are free of  material  misstatement.  An  audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the financial  statements.  Our procedures  included  confirmation of securities
owned as of July 31, 1999, by correspondence with the custodian and brokers; and
where  confirmations were not received from brokers, we performed other auditing
procedures.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

               In our opinion, the financial statements and financial highlights
referred to above  present  fairly,  in all  material  respects,  the  financial
position of  Oppenheimer  California  Municipal  Fund as of July 31,  1999,  the
results of its operations for the year then ended, the changes in its net assets
for each of the years in the  two-year  period  then  ended,  and the  financial
highlights  for each of the  years in the  three-year  period  then  ended,  the
seven-month  period ended July 31,  1996,  and each of the years in the two-year
period ended December 31, 1995, in conformity with generally accepted accounting
principles.

/s/ KPMG LLP

KPMG LLP

Denver, Colorado
August 20, 1999


<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  July 31, 1999
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face
Market Value
                                                     (Unaudited)     Amount
See Note 1
==============================================================================================
Municipal Bonds and Notes--99.6%
----------------------------------------------------------------------------------------------
California--94.8%
<S>                                                  <C>             <C>
<C>
Anaheim, CA PFAU Lease RB, Public
Improvements Project, Sub. Lien, Series C,
FSA Insured, Zero Coupon, 5.27%, 9/1/20(1)           Aaa/AAA/AAA     $17,630,000
$ 5,450,843
----------------------------------------------------------------------------------------------
Anaheim, CA PFAU TXAL RB, MBIA Insured,
Inverse Floater, 12.30%, 12/28/18(2)                 Aaa/AAA
3,000,000     3,615,000
----------------------------------------------------------------------------------------------
Berkeley, CA HF RRB, Alta Bates Medical Center,
Prerefunded, Series A, 6.50%, 12/1/11                A2/NR
4,500,000     4,849,785
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, American
Baptist Homes, Series A, 6.20%, 10/1/27              NR/BBB
6,000,000     6,223,860
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, Episcopal
Homes Foundation, 5.125%, 7/1/18                     NR/A-
5,900,000     5,539,274
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, Rhonda Haas
Goldman Plaza, 5.125%, 5/15/23                       NR/A+
2,300,000     2,147,119
----------------------------------------------------------------------------------------------
CA CDAU Lease RB, United Airlines,
Series A, 5.70%, 10/1/33                             Baa3/BB+
9,185,000     9,143,025
----------------------------------------------------------------------------------------------
CA Community College FAU Lease RB,
West Valley Mission Community College,
MBIA Insured, 5.625%, 5/1/22                         Aaa/AAA
3,585,000     3,630,279
----------------------------------------------------------------------------------------------
CA Educational FA RRB, Los Angeles
College Chiropractic, 5.60%, 11/1/17                 Baa2/NR
1,000,000       994,820
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RB, Sr. Lien, Prerefunded, Series A, 6.50%, 1/1/32   Baa3/BBB-/BBB
4,600,000     5,144,410
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RRB, Zero Coupon, 5.98%, 1/15/21(1)(3)               Baa3/BBB-/BBB
7,500,000     2,080,875
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RRB, Zero Coupon, 6%, 1/15/22(1)(3)                  Baa3/BBB-/BBB
7,500,000     1,957,650
----------------------------------------------------------------------------------------------
CA GOB, 5%, 10/1/27                                  Aa3/A+/AA-
2,000,000     1,861,520
----------------------------------------------------------------------------------------------
CA GOB, MBIA Insured, 5%, 8/1/24                     Aaa/AAA/AAA
6,000,000     5,622,060
----------------------------------------------------------------------------------------------
CA HFA RB, Series A, 7.35%, 8/1/11                   Aa2/AA-
75,000        78,302
----------------------------------------------------------------------------------------------
CA HFA RB, Series C, 7.60%, 8/1/30                   Aa2/AA-
940,000       957,913
----------------------------------------------------------------------------------------------
CA HFA RB, Series E-1, 6.45%, 2/1/12                 Aa2/AA-
750,000       790,492
----------------------------------------------------------------------------------------------
CA HFA RB, Series M, MBIA Insured,
5.60%, 8/1/29                                        Aaa/AAA
2,500,000     2,496,375
----------------------------------------------------------------------------------------------
CA HFA SFM RB, Series 83, Inverse
Floater, 9.045%, 8/1/25(2)                           NR/AAA
4,000,000     4,401,600
----------------------------------------------------------------------------------------------
CA HFA SFM RB, Series C, 6.75%, 2/1/25               Aa2/AA-           9,730,000
10,232,944

</TABLE>


                  14   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face
Market Value
                                                     (Unaudited)      Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>
<C>
CA HFFAU RB, Los Angeles Children's Hospital,
Prerefunded, Series A, 7.125%, 6/1/21                Aaa/NR           $1,000,000
$1,076,060
----------------------------------------------------------------------------------------------
CA HFFAU RRB, Kaiser Permanente,
Series B, 5%, 10/1/18                                A3/A
3,500,000     3,241,245
----------------------------------------------------------------------------------------------
CA Infrastructure & ED Bank RB, American
Center for Wine, Food & Arts, 5.75%, 12/1/24         NR/A /A
5,000,000     4,969,850
----------------------------------------------------------------------------------------------
CA Intermodal Container Transfer Facility Joint
PAU RRB, Southern Pacific Transportation Co.,
Series A, 7.70%, 11/1/14                             A3/A-
1,000,000     1,027,910
----------------------------------------------------------------------------------------------
CA PCFAU SWD RRB, North Cnty. Recycling
Center, Escrowed to Maturity, Series A,
6.75%, 7/1/11                                        Aaa/NR
500,000       544,340
----------------------------------------------------------------------------------------------
CA PWBL RB, State Prison Department of
Corrections, Series E, FSA Insured, 5.50%, 6/1/15    Aaa/AAA/AAA
3,000,000     3,127,410
----------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM RB, Mtg.-Backed
Securities Program, Series B-5, 6.35%, 12/1/29       NR/AAA
3,080,000     3,290,826
----------------------------------------------------------------------------------------------
CA Saddleback Community College District
Refunding COP, BIG Insured, 7%, 8/1/19               Aaa/AAA
1,000,000     1,020,100
----------------------------------------------------------------------------------------------
CA SCDAU COP, Children's Hospital-Los Angeles,
5.25%, 8/15/29                                       A1/A+
5,000,000     4,701,950
----------------------------------------------------------------------------------------------
CA SCDAU COP, The Internext Group,
5.375%, 4/1/17                                       NR/BBB
5,500,000     5,231,600
----------------------------------------------------------------------------------------------
CA SCDAU COP, The Internext Group,
5.375%, 4/1/30                                       NR/BBB
8,500,000     7,847,455
----------------------------------------------------------------------------------------------
CA SCDAU Revenue Refunding COP,
Inverse Floater, 7.575%, 11/1/15(2)                  A1/NR
6,600,000     6,327,750
----------------------------------------------------------------------------------------------
Campbell, CA Refunding COP, Civic Center
Project, Prerefunded Balance, 6.75%, 10/1/17         A /A
1,130,000     1,218,061
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Bonds,
Ladera No. 98-2, 5.70%, 9/1/20                       NR/NR
5,000,000     4,844,800
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Bonds,
Prerefunded, No. 92-1, 7.10%, 9/1/21                 NR/NR
3,250,000     3,838,575
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Refunding
Bonds, Las Flores No. 92-1, MBIA Insured,
5%, 9/1/23                                           Aaa/AAA/AAA
1,000,000       938,090
----------------------------------------------------------------------------------------------
Central CA Joint Powers Health FAU COP,
Community Hospitals of Central California
Project, 5%, 2/1/23                                  Baa1/NR
5,090,000     4,601,258
----------------------------------------------------------------------------------------------
Clovis, CA USD CAP GOB, Series D, FGIC Insured,
Zero Coupon, 5.60%, 8/1/10(1)                        Aaa/AAA
2,000,000     1,154,120
----------------------------------------------------------------------------------------------
Colton, CA PFAU TXAL RRB, Redevelopment
Projects, Series B, 5.875%, 8/1/27                   NR/NR
3,700,000     3,575,421

</TABLE>


                  15   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face
Market Value
                                                     (Unaudited)      Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>
<C>
Commerce, CA Community Development
Commission TXAL Refunding Bonds,
Redevelopment Project No. 1, Sub. Lien,
Series B, 5.75%, 8/1/10                              NR/NR            $  815,000
$  820,542
----------------------------------------------------------------------------------------------
Commerce, CA Community Development
Commission TXAL Refunding Bonds,
Redevelopment Project No. 1, Sub. Lien,
Series B, 6%, 8/1/21                                 NR/NR
2,800,000     2,789,836
----------------------------------------------------------------------------------------------
Commerce, CA Joint Powers FAU Lease RB,
Community Center, Series A, 6.25%, 10/1/22           Baa2/NR
1,410,000     1,462,198
----------------------------------------------------------------------------------------------
Compton, CA Refunding COP, Civic Center &
Capital Improvements, Series A, 5.50%, 9/1/15        NR/BBB
3,000,000     2,938,740
----------------------------------------------------------------------------------------------
Davis, CA Public Facilities FAU Local Agency
RRB, Mace Ranch Area, Series A, 6.60%, 9/1/25        NR/NR
5,000,000     5,182,100
----------------------------------------------------------------------------------------------
Delta Cnty., CA Home Mtg. FAU SFM RB,
Series A, 5.35%, 6/1/24                              Aaa/AAA/AAA
4,605,000     4,475,231
----------------------------------------------------------------------------------------------
Duarte, CA COP, City of Hope National
Medical Center, 6.25%, 4/1/23                        Baa1/AAA
4,500,000     4,902,930
----------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA
Insured, Zero Coupon, 6.20%, 11/1/18(1)              Aaa/AAA
6,000,000     2,089,320
----------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA
Insured, Zero Coupon, 6.20%, 11/1/19(1)              Aaa/AAA
2,000,000       654,140
----------------------------------------------------------------------------------------------
Fontana, CA RA TXAL Refunding Bonds,
Jurupa Hills Redevelopment Project,
Series A, 5.50%, 10/1/19                             NR/BBB+
1,345,000     1,310,528
----------------------------------------------------------------------------------------------
Fontana, CA RA TXAL Refunding Bonds,
Jurupa Hills Redevelopment Project,
Series A, 5.50%, 10/1/27                             NR/BBB+
6,040,000     5,842,311
----------------------------------------------------------------------------------------------
Huntington Park, CA PFAU Lease RRB,
Wastewater System Project, Series A,
6.20%, 10/1/25                                       NR/NR
3,000,000     3,014,490
----------------------------------------------------------------------------------------------
Industry, CA Improvement Bond Act of 1915 SPAST GOB,  Prerefunded,  District No.
91-1,
7.65%, 9/2/21                                        NR/NR
1,750,000     1,952,352
----------------------------------------------------------------------------------------------
Irvine, CA Improvement Bond Act of 1915
SPAST GOB, District 94-13-Group One,
5.50%, 9/22/22                                       NR/NR
2,500,000     2,365,600
----------------------------------------------------------------------------------------------
Laguna Salada, CA USD CAP GOB, Series B,
FGIC Insured, Zero Coupon, 5.30%, 8/1/22(1)          Aaa/AAA/AAA
3,035,000       845,490
----------------------------------------------------------------------------------------------
Lake Elsinore, CA PFAU TXAL Bonds,
Series A, 5.50%, 9/1/30                              NR/BBB
5,000,000     4,699,450

</TABLE>

                  16   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face
Market Value
                                                     (Unaudited)      Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>
<C>
Lake Elsinore, CA School FAU SPTX RRB,
Horsethief Canyon, 5.625%, 9/1/16                    NR/NR            $4,760,000
$4,580,405
----------------------------------------------------------------------------------------------
Long Beach, CA Water RRB, Series A,
MBIA Insured, 5%, 5/1/24                             Aaa/AAA
7,090,000     6,644,961
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 5.58%, 3/1/12(1)               Baa1/BBB/A-
1,700,000       842,622
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 6.92%, 9/1/10(1)               Baa1/BBB/A-
5,960,000     3,278,358
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 6.95%, 9/1/11(1)               Baa1/BBB/A-
2,900,000     1,492,021
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 7.03%, 9/1/13(1)               Baa1/BBB/A-
4,500,000     2,034,675
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 5.16%, 9/1/14(1)               Baa1/BBB/A-
7,260,000     3,080,128
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RRB, First
Tier-Property A, Series A, FSA Insured, 5%, 7/1/15   Aaa/AAA/AAA
5,000,000     4,879,200
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RRB,
Series A, FSA Insured, 5%, 7/1/14                    Aaa/AAA/AAA
5,000,000     4,919,800
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Public Works FAU Lease
RB, Multiple Capital Facilities Project V,
Series A, AMBAC Insured, 5.125%, 6/1/17              Aaa/AAA
1,965,000     1,922,163
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Public Works FAU RRB,
Regional Park & Open Space District,
Series A, 5%, 10/1/16(4)                             Aa3/AA
7,600,000     7,356,952
----------------------------------------------------------------------------------------------
Los Angeles, CA Harbor Department RB,
Series B, 5.375%, 11/1/23                            Aa3/AA/AA
5,000,000     4,841,600
----------------------------------------------------------------------------------------------
Los Angeles, CA USD GOB, Series B,
FGIC Insured, 5%, 7/1/23                             Aaa/AAA/AAA
5,000,000     4,691,500
----------------------------------------------------------------------------------------------
Oakland, CA RA TXAL Refunding Bonds,
MBIA Insured, 5.95%, 9/1/19(5)                       Aaa/AAA
8,600,000     9,040,578
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 86-2 SPTX
Refunding Bonds, Rancho Santa Margarita,
Series A, 5.55%, 8/15/17                             NR/NR
1,000,000       974,410
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
Aliso Viejo, Prerefunded, Series A, 7.10%, 8/15/05   NR/AAA
1,440,000     1,594,915
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
Aliso Viejo, Prerefunded, Series A, 7.35%, 8/15/18   NR/AAA
7,000,000     7,802,760
----------------------------------------------------------------------------------------------
Orange Cnty., CA Improvement Bond Act of
1915 RRB, Irvine Coast Assessment District,
No. 88-1-A, 5.50%, 9/2/16                            NR/NR
3,000,000     2,973,630

</TABLE>


                  17   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face
Market Value
                                                     (Unaudited)     Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>
<C>
Orange Cnty., CA Improvement Bond Act of
1915 SPAST GOB, Assessment No. 88-1,
6.25%, 9/2/18                                        NR/NR           $ 2,300,000
$ 2,326,404
----------------------------------------------------------------------------------------------
Palm Springs, CA COP, Escrowed to Maturity,
Sub. Lien, Series B, Zero Coupon,
5.54%, 4/15/21(1)                                    NR/AAA
15,000,000     4,520,700
----------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL Refunding Bonds,
Los Medanos Community Development
Project, Sub. Lien, 6.20%, 8/1/19                    NR/BBB
2,500,000     2,630,325
----------------------------------------------------------------------------------------------
Placentia, CA PFAU SPTX RB, Jr. Lien,
Series B, 6.60%, 9/1/15                              NR/NR
1,600,000     1,641,776
----------------------------------------------------------------------------------------------
Pomona, CA SFM RRB, Escrowed to Maturity,
Series A, 7.60%, 5/1/23                              Aaa/AAA
4,500,000     5,644,350
----------------------------------------------------------------------------------------------
Pomona, CA SFM RRB, Escrowed to Maturity,
Series B, 7.50%, 8/1/23                              Aaa/AAA
500,000       625,050
----------------------------------------------------------------------------------------------
Pomona, CA USD GORB, Series A, MBIA
Insured, 6.15%, 8/1/15                               Aaa/AAA
2,000,000     2,190,760
----------------------------------------------------------------------------------------------
Port Oakland, CA Port RB, Series G, MBIA
Insured, 5.375%, 11/1/25                             Aaa/AAA/AAA      10,650,000
10,371,502
----------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
FGIC Insured, Inverse Floater, 7.97%, 6/1/19(2)      Aaa/AAA/AAA
4,000,000     4,135,000
----------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
MBIA Insured, Inverse Floater, 9.339%, 7/8/22(2)     Aaa/AAA
2,500,000     3,040,625
----------------------------------------------------------------------------------------------
Richmond, CA Improvement Bond Act of 1915
GORB, Reassessment District No. 855,
6.60%, 9/2/19                                        NR/NR
1,500,000     1,545,450
----------------------------------------------------------------------------------------------
Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
Prerefunded, 7.55%, 9/1/17                           NR/NR
3,000,000     3,186,150
----------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU Refunding COP,
5.75%, 5/15/19                                       NR/BBB-
2,100,000     2,079,735
----------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU TXAL RRB,
Redevelopment Projects, Series A,
5.625%, 10/1/33                                      Baa2/BBB-
6,600,000     6,491,166
----------------------------------------------------------------------------------------------
Riverside Cnty., CA Refunding COP, Air Force
Village West, Inc., Series A, 8.125%, 6/15/12        NR/NR
3,000,000     3,367,320
----------------------------------------------------------------------------------------------
Riverside Cnty., CA Refunding COP, Air Force
Village West, Inc., Series A, 8.125%, 6/15/20        NR/NR
3,000,000     3,367,320
----------------------------------------------------------------------------------------------
Riverside Cnty., CA SFM RB, Escrowed to
Maturity, Series A, 7.80%, 5/1/21                    Aaa/AAA
4,285,000     5,546,675
----------------------------------------------------------------------------------------------
Sacramento Cnty., CA SFM RB, Escrowed to
Maturity, 8%, 7/1/16(4)                              Aaa/AAA          10,000,000
12,944,900

</TABLE>

                  18   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face
Market Value
                                                     (Unaudited)     Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>
<C>
Sacramento Cnty., CA SPTX Refunding Bonds,
CFD No. 1, 5.70%, 12/1/20                            NR/NR           $ 2,000,000
$1,938,420
----------------------------------------------------------------------------------------------
Sacramento, CA Cogeneration Authority RB,
Procter & Gamble Project, 6.50%, 7/1/14              NR/BBB-/NR
5,000,000     5,631,600
----------------------------------------------------------------------------------------------
Sacramento, CA MUD Electric RRB, FGIC
Insured, Inverse Floater, 9.325%, 8/15/18(2)         Aaa/AAA/AAA
5,500,000     6,235,625
----------------------------------------------------------------------------------------------
Sacramento, CA PAU RB, Cogeneration
Project, 6%, 7/1/22                                  NR/BBB-
7,300,000     7,453,592
----------------------------------------------------------------------------------------------
San Bernardino Cnty., CA COP, Medical
Center Financing Project, MBIA Insured,
5.50%, 8/1/17                                        Aaa/AAA
5,250,000     5,404,717
----------------------------------------------------------------------------------------------
San Diego Cnty., CA COP, MBIA Insured,
Inverse Floater, 8.896%, 11/18/19(2)                 A1/A
2,000,000     2,202,500
----------------------------------------------------------------------------------------------
San Diego Cnty., CA Water Authority Revenue
COP, Prerefunded, Series 91-B, MBIA Insured,
Inverse Floater, 9.12%, 4/8/21(2)                    Aaa/AAA
3,000,000     3,630,000
----------------------------------------------------------------------------------------------
San Diego, CA Convention Center Expansion
FAU Lease RB, Series A, 5.25%, 4/1/16                Aaa/AAA/AAA
3,000,000     2,984,940
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Issue 22, AMBAC
Insured, 5%, 5/1/19                                  Aaa/AAA/AAA
235,000       220,797
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Series 84, AMBAC
Insured, Inverse Floater, 6.145%, 5/1/19(2)          NR/AAA
4,750,000     4,175,820
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C,
Zero Coupon, 5.10%, 8/1/11(1)                        A2/A
2,350,000     1,218,875
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C, Zero
Coupon, 5.15%, 8/1/12(1)                             A2/A
2,350,000     1,142,382
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C, Zero
Coupon, 5.25%, 8/1/14(1)                             A2/A
2,350,000     1,006,129
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, Series C, Zero
Coupon, 5%, 8/1/10(1)                                A2/A
2,350,000     1,302,652
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road CAP RRB, Series A,
0%/5.75%, 1/15/21(6)                                 Baa3/BBB-/BBB
11,800,000     7,620,558

</TABLE>

                  19   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face
Market Value
                                                     (Unaudited)     Amount
See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>
<C>
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road CAP RRB, Series A, MBIA
Insured, Zero Coupon, 5.73%, 1/15/25(1)              Aaa/AAA/AAA     $18,250,000
$  4,386,570
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road RB, Sr. Lien, 5%, 1/1/33            Baa3/BBB-/BBB
8,000,000     7,161,920
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road RB, Sr. Lien, Prerefunded,
6.75%, 1/1/32                                        Aaa/AAA/AAA
7,000,000     7,718,480
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Inner-City Commuter,
Series C, 5.60%, 9/1/19                              NR/BBB
3,060,000     2,959,601
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Mainplace Project,
Series D, 5.50%, 9/1/15                              NR/NR
1,000,000       953,760
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Mainplace Project,
Series D, 5.60%, 9/1/19                              NR/NR
1,000,000       950,250
----------------------------------------------------------------------------------------------
Santa Margarita/Dana Point, CA Authority RB,
Improvement Districts 3-3A-4-4A, Series B,
MBIA Insured, 7.25%, 8/1/14                          Aaa/AAA
680,000       833,864
----------------------------------------------------------------------------------------------
Southern CA Home FAU SFM RB,
Series A, 7.35%, 9/1/24                              NR/AAA
1,340,000     1,393,761
----------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District
Waterworks RB, Inverse Floater,
7.419%, 10/30/20(2)                                  Aa2/AA
3,300,000     3,291,750
----------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District
Waterworks RRB, Series A, 4.75%, 7/1/22              Aa2/AA
10,000,000     9,011,100
----------------------------------------------------------------------------------------------
Southern CA PPAU Transmission Project RB,
Inverse Floater, 7.615%, 7/1/12(2)                   Aa3/A+
1,900,000     2,101,875
----------------------------------------------------------------------------------------------
Stockton, CA CFD No. 90-2 SPTX RRB,
Brookside Estates, 6.20%, 8/1/15                     NR/NR
1,750,000     1,780,870
----------------------------------------------------------------------------------------------
Temecula, CA CFD No. 88-12-A SPTX
Refunding Bonds, 5.625%, 9/1/17                      NR/NR
2,175,000     2,125,454
----------------------------------------------------------------------------------------------
Tustin, CA USD CFD No. 88-1 SPTX RB,
Prerefunded, Series B, 6.375%, 9/1/21                NR/NR
3,500,000     3,978,520
----------------------------------------------------------------------------------------------
University of CA Regents RB, Multiple Purpose
Projects, Prerefunded, Series A, 6.875%, 9/1/16      NR/AAA
1,950,000     2,149,388
----------------------------------------------------------------------------------------------
West Sacramento, CA Improvement Bond Act of
1915 SPAST Refunding Bonds, 5.60%, 9/2/17            NR/NR
2,000,000     1,938,020
----------------------------------------------------------------------------------------------
Yuba City, CA USD Refunding COP,
Series A, 5%, 2/1/17                                 Aaa/AAA
3,010,000     2,909,496

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

441,559,397
</TABLE>



                  20   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face
Market Value
                                                     (Unaudited)      Amount
See Note 1
----------------------------------------------------------------------------------------------
U.S. Possessions--4.8%
<S>                                                  <C>              <C>
<C>
Guam PAU RB, Series A, 6.625%, 10/1/14               NR/BBB           $2,000,000
$  2,241,980
----------------------------------------------------------------------------------------------
PR CMWLTH GORB, MBIA Insured,
Inverse Floater, 7.794%, 7/1/08(2)                   Aaa/AAA
3,500,000     3,815,000
----------------------------------------------------------------------------------------------
PR CMWLTH HTAU RRB, Series A,
AMBAC Insured, 5.50%, 7/1/13                         Aaa/AAA/AAA
3,000,000     3,144,390
----------------------------------------------------------------------------------------------
PR CMWLTH HTAU RRB, Series A,
AMBAC Insured, 5.50%, 7/1/14                         Aaa/AAA/AAA
3,500,000     3,657,920
----------------------------------------------------------------------------------------------
PR EPAU RB, Prerefunded, Series P, 7%, 7/1/21        Baa1/BBB+
4,000,000     4,305,560
----------------------------------------------------------------------------------------------
PR HFA SFM RB, Affordable Housing Mtg
Portfolio I, 6.25%, 4/1/29                           Aaa/AAA
2,440,000     2,531,256
----------------------------------------------------------------------------------------------
PR Housing Finance Corp. SFM RB, Portfolio 1,
Series B, 7.65%, 10/15/22                            Aaa/AAA
275,000       286,209
----------------------------------------------------------------------------------------------
PR Industrial, Medical & Environmental
PC Facilities Tourist RB, Mennonite General
Hospital Project, Series A, 6.50%, 7/1/12            NR/BBB-/BBB
2,350,000     2,468,157

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

22,450,472

----------------------------------------------------------------------------------------------
Total Investments, at Value (Cost $451,843,264)                             99.6%
464,009,869
----------------------------------------------------------------------------------------------
Other Assets Net of Liabilities
0.4     1,979,775
                                                                       ---------
------------
Net Assets                                                                 100.0%
$465,989,644
                                                                       =========
============
</TABLE>

<TABLE>
<CAPTION>

To simplify the listings of securities, abbreviations are used per the table
below:
<S>                                                <C>

CAP    -- Capital Appreciation                     PAU   -- Power Authority
CDAU   -- Communities Development Authority        PC    -- Pollution Control
CFD    -- Community Facilities District            PCFAU -- Pollution Control
Finance Authority
CMWLTH -- Commonwealth                             PFAU  -- Public Finance Authority
COP    -- Certificates of Participation            PPAU  -- Public Power Authority
ED     -- Economic Development                     PWBL  -- Public Works Board Lease
EPAU   -- Electric Power Authority                 RA    -- Redevelopment Agency
FA     -- Facilities Authority                     RB    -- Revenue Bonds
FAU    -- Finance Authority                        RRB   -- Revenue Refunding Bonds
GOB    -- General Obligation Bonds                 SCDAU -- Statewide Communities
Development Authority
GORB   -- General Obligation Refunding Bonds       SDI   -- School District
HF     -- Health Facilities                        SFM   -- Single Family Mortgage
HFA    -- Housing Finance Agency                   SPAST -- Special Assessment
HFFAU  -- Health Facilities Finance Authority      SPTX  -- Special Tax
HTAU   -- Highway & Transportation Authority       SWD   -- Solid Waste Disposal
MTAU   -- Metropolitan Transportation Authority    TXAL  -- Tax Allocation
MUD    -- Municipal Utility District               USD   -- Unified School District
</TABLE>


                  21   Oppenheimer California Municipal Fund
<PAGE>
--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------


--------------------------------------------------------------------------------
1. For zero coupon bonds,  the interest rate shown is the effective yield on the
date of purchase.  2.  Represents the current  interest rate for a variable rate
bond known as an "inverse  floaters"  which pays  interest at a rate that varies
inversely  with  short-term  interest  rates.  As interest  rates rise,  inverse
floaters produce less current income.  Their price may be more volatile than the
price  of  a  comparable   fixed-rate  security.   Inverse  floaters  amount  to
$46,972,545 or 10.08% of the Fund's net assets as of July 31, 1999.
3. When-issued security to be delivered and settled after July 31, 1999.
4. Securities with an aggregate market value of $1,808,680 are held in
collateralized accounts to cover initial margin requirements on open futures
sales contracts. See Note 5 of Notes to Financial Statements.
5. Represents the current interest rate for a variable rate security.
6. Denotes a step bond: a zero coupon bond that converts to a fixed or variable
interest rate at a designated future date.

As of July 31, 1999, securities subject to the alternative minimum tax amount to
$77,814,717 or 16.70% of the Fund's net assets.

Distribution  of  investments  by industry of issue,  as a  percentage  of total
investments at value, is as follows:

Industry                                             Market Value     Percent
-----------------------------------------------------------------------------
Special Assessment                                   $121,100,182        26.2%*
-----------------------------------------------------------------------------
Single-Family Housing                                  55,695,885        12.0
-----------------------------------------------------------------------------
Municipal Leases                                       43,363,362         9.3
-----------------------------------------------------------------------------
Highways                                               42,872,773         9.2
-----------------------------------------------------------------------------
Hospital/Healthcare                                    36,689,836         7.9
-----------------------------------------------------------------------------
Adult Living Facilities                                35,803,683         7.7
-----------------------------------------------------------------------------
Electric Utilities                                     35,145,857         7.6
-----------------------------------------------------------------------------
General Obligation                                     22,923,910         4.9
-----------------------------------------------------------------------------
Water Utilities                                        22,577,811         4.9
-----------------------------------------------------------------------------
Marine/Aviation Facilities                             20,637,629         4.4
-----------------------------------------------------------------------------
Sales Tax                                               9,799,000         2.1
-----------------------------------------------------------------------------
Corporate Backed                                        9,143,025         2.0
-----------------------------------------------------------------------------
Higher Education                                        6,774,486         1.5
-----------------------------------------------------------------------------
Education                                                 938,090         0.2
-----------------------------------------------------------------------------
Resource Recovery                                         544,340         0.1
                                                     ------------       -----
Total                                                $464,009,869       100.0%
                                                     ============       =====

*Securities with a market value of $22,353,273 or 18.46% of total investments at
value  are  represented  by  pre-refunded  securities,  collateralized  by  U.S.
government securities.

See accompanying Notes to Financial Statements.

                  22   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Assets and Liabilities  July 31, 1999
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


=======================================================================================
Assets
<S>
<C>
Investments, at value (cost $451,843,264)--see accompanying statement
$464,009,869
---------------------------------------------------------------------------------------
Cash
187,500
---------------------------------------------------------------------------------------
Receivables and other assets:
Interest
6,445,459
Investments sold
1,881,411
Shares of beneficial interest sold
323,018
Daily variation on futures contracts--Note 5
70,469
Other
4,546

------------
Total assets
472,922,272

=======================================================================================
Liabilities Payables and other liabilities:
Investments   purchased   (including   $4,107,525  purchased  on  a  when-issued
basis)--Note  1 4,107,525  Dividends  1,238,112  Shares of  beneficial  interest
redeemed  1,191,917  Trustees'  compensation--Note  1 162,339  Distribution  and
service plan fees 96,106  Shareholder  reports 55,955  Transfer and  shareholder
servicing agent fees 26,547 Custodian fees 2,937 Other 51,190

------------
Total liabilities
6,932,628

=======================================================================================
Net Assets
$465,989,644

============

=======================================================================================
Composition of Net Assets
Paid-in capital
$455,561,717
---------------------------------------------------------------------------------------
Overdistributed net investment income
(1,088,872)
---------------------------------------------------------------------------------------
Accumulated net realized loss on investment transactions
(648,400)
---------------------------------------------------------------------------------------
Net unrealized appreciation on investments--Notes 3 and 5
12,165,199

------------
Net assets
$465,989,644

============
</TABLE>



                  23   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Assets and Liabilities  (Continued)
--------------------------------------------------------------------------------
<TABLE>

=======================================================================================
Net Asset Value Per Share
Class A Shares:
<S>
<C>
Net  asset  value  and  redemption  price  per  share  (based  on net  assets of
$316,362,542 and 29,941,203 shares of beneficial  interest  outstanding)  $10.57
Maximum  offering price per share (net asset value plus sales charge of 4.75% of
offering price) $11.10

---------------------------------------------------------------------------------------
Class B Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and offering  price per share (based on net assets of  $132,762,787  and
12,560,331 shares of beneficial interest outstanding) $10.57

---------------------------------------------------------------------------------------
Class C Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and  offering  price per share (based on net assets of  $16,864,315  and
1,598,190 shares of beneficial interest outstanding) $10.55 </TABLE>

See accompanying Notes to Financial Statements.


                  24   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Operations  For the Year Ended July 31, 1999
--------------------------------------------------------------------------------
<TABLE>

=======================================================================================
Investment Income
<S>
<C>
Interest                                                                   $
26,109,577

=======================================================================================
Expenses
Management fees--Note 4
2,540,982
---------------------------------------------------------------------------------------
Distribution and service plan fees--Note 4:
Class A
757,647
Class B
1,294,892
Class C
146,564
---------------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees--Note 4
259,539
---------------------------------------------------------------------------------------
Shareholder reports
98,260
---------------------------------------------------------------------------------------
Trustees' compensation--Note 1
47,096
---------------------------------------------------------------------------------------
Custodian fees and expenses
45,007
---------------------------------------------------------------------------------------
Legal, auditing and other professional fees
42,049
---------------------------------------------------------------------------------------
Registration and filing fees
15,486
---------------------------------------------------------------------------------------
Insurance expenses
8,257
---------------------------------------------------------------------------------------
Other
10,495

------------
Total expenses
5,266,274
Less expenses paid indirectly--Note 1
(25,729)

------------
Net expenses
5,240,545

=======================================================================================
Net Investment Income
20,869,032

=======================================================================================
Realized and Unrealized Gain (Loss)
Net realized gain on:
Investments
199,201
Closing of futures contracts
167,513

------------
Net realized gain
366,714

---------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation on investments
(16,235,114)

------------
Net realized and unrealized loss
(15,868,400)

=======================================================================================
Net Increase in Net Assets Resulting from Operations                       $
5,000,632

============
</TABLE>


See accompanying Notes to Financial Statements.


                  25   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Changes in Net Assets
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>



Year Ended July 31,

1999             1998
=============================================================================================================
Operations
<S>
<C>              <C>
Net investment income                                                           $
20,869,032     $ 19,136,459
-------------------------------------------------------------------------------------------------------------
Net realized gain
(loss)                                                             366,714
(1,120,364)
-------------------------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation
(16,235,114)       3,444,127

------------     ------------
Net increase in net assets resulting from operations
5,000,632       21,460,222

=============================================================================================================
Dividends  and/or  Distributions  to Shareholders  Dividends from net investment
income:
Class A
(15,214,034)     (14,732,831)
Class B
(5,284,436)      (4,147,106)
Class C
(600,129)        (359,910)
-------------------------------------------------------------------------------------------------------------
Distributions from net realized gain:
Class
A
--       (2,092,323)
Class
B
--         (677,374)
Class
C
--          (51,258)

=============================================================================================================
Beneficial  Interest  Transactions  Net  increase in net assets  resulting  from
beneficial interest transactions--Note 2:
Class A
26,403,170        3,072,554
Class B
22,044,556       33,042,362
Class C
6,138,090        5,382,827

=============================================================================================================
Net Assets
Total increase
38,487,849       40,897,163
-------------------------------------------------------------------------------------------------------------
Beginning of period
427,501,795      386,604,632

------------     ------------
End of period (including overdistributed net investment
income of $1,088,872 and $859,305, respectively)
$465,989,644     $427,501,795

============     ============
</TABLE>


See accompanying Notes to Financial Statements.

                  26   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Financial Highlights
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                     Class A

---------------------------------------------------------------------
                                                     Year
Ended                                       Year Ended
                                                     July
31,                                         December 31,
                                                     1999        1998
1997          1996(1)     1995        1994
==========================================================================================================================
Per Share Operating Data
<S>                                                  <C>         <C>
<C>           <C>         <C>         <C>
Net asset value, beginning of period                   $10.92      $10.94
$10.39        $10.69      $ 9.45      $10.97
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                     .53         .54
 .58           .33         .58         .60
Net realized and unrealized gain (loss)                  (.35)        .06
 .54          (.30)       1.25       (1.51)
                                                       ------      ------
------        ------      ------      ------
Total income (loss) from
investment operations                                     .18         .60
1.12           .03        1.83        (.91)

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

Dividends and distributions to shareholders:
Dividends from net investment income                     (.53)       (.54)
(.57)         (.33)       (.58)       (.61)
Dividends in excess of net
investment income                                          --          --
--            --        (.01)         --
Distributions from net realized gain                       --        (.08)
--            --          --          --
                                                       ------      ------
------        ------      ------      ------
Total dividends and distributions
to shareholders                                          (.53)       (.62)
(.57)         (.33)       (.59)       (.61)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                         $10.57      $10.92
$10.94        $10.39      $10.69      $ 9.45
                                                       ======      ======
======        ======      ======      ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                      1.59%       5.66%
11.11%         0.34%      19.76%      (8.49)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                       $316,363    $300,717
$298,162      $286,033    $285,307    $219,682
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                    $314,094    $297,372
$289,439      $279,796    $250,188    $248,850
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                    4.79%       4.91%
5.49%         5.53%       5.64%       5.99%
Expenses                                                 0.91%       0.92%(4)
0.94%(4)      0.97%(4)    0.95%(4)    0.96%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                 35%         31%
31%           14%         23%         22%
</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  27   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Financial Highlights  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                         Class B

-----------------------------------------------------------------
                                                         Year
Ended                                     Year Ended
                                                         July
31,                                       December 31,
                                                         1999          1998
1997       1996(1)  1995       1994
==========================================================================================================================
Per Share Operating Data
<S>                                                      <C>           <C>
<C>        <C>      <C>        <C>
Net asset value, beginning of period                       $10.92
$10.94      $10.39     $10.69   $ 9.44     $10.98
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45
 .46         .49        .28      .51        .54
Net realized and unrealized gain (loss)                      (.35)
 .06         .55       (.30)    1.25      (1.55)
                                                           ------
------      ------     ------   ------     ------
Total income (loss) from
investment operations                                         .10
 .52        1.04       (.02)    1.76      (1.01)

--------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)
(.46)       (.49)      (.28)    (.50)      (.53)
Dividends in excess of net
investment income                                              --
--          --         --     (.01)        --
Distributions from net realized gain                           --
(.08)         --         --       --         --
                                                           ------
------      ------     ------   ------     ------
Total dividends and distributions
to shareholders                                              (.45)
(.54)       (.49)      (.28)    (.51)      (.53)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.57
$10.92      $10.94     $10.39   $10.69     $ 9.44
                                                           ======
======      ======     ======   ======     ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                          0.82%
4.86%      10.27%     (0.12)%  18.97%     (9.39)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                           $132,763      $115,444
$82,474    $52,038  $41,224    $20,224
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                        $129,538      $ 99,266
$65,192    $46,422  $29,918    $16,552
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%
4.21%       4.70%      4.74%    4.82%      5.17%
Expenses                                                     1.67%
1.67%(4)    1.70%(4)   1.74%(4) 1.72%(4)   1.73%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%
31%         31%        14%      23%        22%
</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  28   Oppenheimer California Municipal Fund


<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                          Class C

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

Period

Ended
                                                          Year Ended July
31,                                Dec. 31,
                                                          1999
1998         1997       1996(1)      1995(6)
--------------------------------------------------------------------------------------------------------------------
Per Share Operating Data
<S>                                                       <C>           <C>
<C>        <C>           <C>
Net asset value, beginning of period                       $10.91
$10.93      $10.38     $10.68        $10.46
--------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45
 .46         .49        .27           .08
Net realized and unrealized gain (loss)                      (.36)
 .06         .55       (.30)          .22
                                                           ------
------      ------     ------        ------
Total income (loss) from
investment operations                                         .09
 .52        1.04       (.03)          .30

--------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)
(.46)       (.49)      (.27)         (.07)
Dividends in excess of net
investment income                                              --
--          --         --          (.01)
Distributions from net realized gain                           --
(.08)         --         --            --
                                                           ------
------     ------     ------        ------
Total dividends and distributions
to shareholders                                              (.45)
(.54)       (.49)      (.27)         (.08)
--------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.55
$10.91      $10.93     $10.38        $10.68
                                                           ======
======      ======     ======        ======

====================================================================================================================
Total Return, at Net Asset Value(2)                          0.73%
4.87%      10.26%     (0.19)%        2.90%

====================================================================================================================
Ratios/Supplemental Data
Net assets, end of period (in thousands)                  $16,864
$11,340      $5,969     $2,171          $125
--------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                         $14,672       $
8,614      $3,869     $1,156          $ 91
--------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%
4.24%       4.66%      4.54%         4.56%
Expenses                                                     1.67%
1.66%(4)    1.70%(4)   1.80%(4)      1.68%(4)
--------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%
31%         31%        14%           23%

</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from  December  31 to July 31.  2.  Assumes  a $1,000  hypothetical  initial
investment  on the  business  day before the first day of the fiscal  period (or
inception of  offering),  with all  dividends  and  distributions  reinvested in
additional  shares on the  reinvestment  date,  and  redemption at the net asset
value  calculated on the last business day of the fiscal  period.  Sales charges
are not reflected in the total  returns.  Total returns are not  annualized  for
periods of less than one full year. 3.  Annualized  for periods of less than one
full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund. 5.
The lesser of purchases or sales of portfolio  securities for a period,  divided
by the monthly average of the market value of portfolio  securities owned during
the  period.  Securities  with a  maturity  or  expiration  date at the  time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended July 31, 1999, were  $206,390,312 and $160,398,205,  respectively.  6. For
the period from November 1, 1995 (inception of offering) to December 31, 1995.

See accompanying Notes to Financial Statements.

<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements
--------------------------------------------------------------------------------

================================================================================
1. Significant Accounting Policies
Oppenheimer  California  Municipal  Fund  (the  Fund) is  registered  under  the
Investment  Company Act of 1940,  as  amended,  as a  non-diversified,  open-end
management  investment  company.  The Fund's investment  objective is to seek as
high a level of current  interest  income  exempt from  federal  and  California
income taxes for  individual  investors as is consistent  with  preservation  of
capital. The Fund's investment advisor is OppenheimerFunds,  Inc. (the Manager).
The Fund  offers  Class A,  Class B and Class C shares.  Class A shares are sold
with a front-end  sales charge,  on  investments  up to $1 million.  Class B and
Class C shares may be subject to a contingent  deferred sales charge (CDSC). All
classes  of  shares  have  identical  rights  to  earnings,  assets  and  voting
privileges, except that each class has its own expenses directly attributable to
that class and exclusive  voting rights with respect to matters  affecting  that
class. Classes A, B and C have separate distribution and/or service plans. Class
B shares will  automatically  convert to Class A shares six years after the date
of purchase.  The  following  is a summary of  significant  accounting  policies
consistently followed by the Fund.
--------------------------------------------------------------------------------
Securities  Valuation.  Portfolio  securities are valued at the close of the New
York Stock  Exchange on each trading day.  Listed and  unlisted  securities  for
which such  information is regularly  reported are valued at the last sale price
of the day or, in the  absence of sales,  at values  based on the closing bid or
the  last  sale  price  on the  prior  trading  day.  Long-term  and  short-term
"non-money  market" debt  securities are valued by a portfolio  pricing  service
approved by the Board of Trustees.  Such securities which cannot be valued by an
approved portfolio pricing service are valued using  dealer-supplied  valuations
provided the Manager is satisfied that the firm rendering the quotes is reliable
and  that  the  quotes  reflect  current  market  value,  or  are  valued  under
consistently  applied  procedures  established  by  the  Board  of  Trustees  to
determine  fair  value  in good  faith.  Short-term  "money  market  type"  debt
securities having a remaining maturity of 60 days or less are valued at cost (or
last  determined  market  value)  adjusted for  amortization  to maturity of any
premium or  discount.  Options are valued  based upon the last sale price on the
principal  exchange  on which the  option is traded  or, in the  absence  of any
transactions  that day, the value is based upon the last sale price on the prior
trading  date if it is within  the  spread  between  the  closing  bid and asked
prices. If the last sale price is outside the spread, the closing bid is used.


                  30   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
Securities Purchased on a When-Issued Basis. Delivery and payment for securities
that have been  purchased  by the Fund on a forward  commitment  or  when-issued
basis can take place a month or more after the  transaction  date.  Normally the
settlement  date occurs within six months after the transaction  date;  however,
the fund may,  from time to time,  purchase  securities  whose  settlement  date
extends  beyond six months and  possibly as long as two years or more beyond the
trade date.  During this  period,  such  securities  do not earn  interest,  are
subject to market  fluctuation  and may  increase  or decrease in value prior to
their delivery.  The Fund maintains  segregated assets with a market value equal
to or greater  than the amount of its  purchase  commitments.  The  purchase  of
securities  on a  when-issued  or  forward  commitment  basis may  increase  the
volatility  of the  Fund's  net asset  value to the  extent  the Fund makes such
purchases while remaining substantially fully invested. As of July 31, 1999, the
Fund  had  entered  into  outstanding  when-issued  or  forward  commitments  of
$4,107,525.
--------------------------------------------------------------------------------
Allocation of Income,  Expenses,  Gains and Losses. Income, expenses (other than
those attributable to a specific class), gains and losses are allocated daily to
each  class  of  shares  based  upon  the  relative  proportion  of  net  assets
represented  by  such  class.  Operating  expenses  directly  attributable  to a
specific class are charged against the operations of that class.
--------------------------------------------------------------------------------
Federal  Taxes.  The Fund intends to continue to comply with  provisions  of the
Internal  Revenue Code  applicable  to  regulated  investment  companies  and to
distribute  all of its  taxable  income,  including  any  net  realized  gain on
investments  not  offset by loss  carryovers,  to  shareholders.  Therefore,  no
federal  income or excise tax  provision is required.  As of July 31, 1999,  the
Fund had available for federal tax purposes an unused  capital loss carryover of
approximately $650,000, which expires in 2006.
-------------------------------------------------------------------------------
Trustees' Compensation. The Fund has adopted a nonfunded retirement plan for the
Fund's  independent  Trustees.  Benefits  are based on years of service and fees
paid to each trustee during the years of service. During the year ended July 31,
1999,  a  provision  of  $2,209  was  made  for  the  Fund's  projected  benefit
obligations and payments of $6,365 were made to retired  trustees,  resulting in
an accumulated liability of $159,162 as of July 31, 1999.
               The Board of Trustees  has adopted a deferred  compensation  plan
for independent  Trustees that enables Trustees to elect to defer receipt of all
or a portion of annual  compensation they are entitled to receive from the Fund.
Under the plan, the compensation  deferred is periodically adjusted as though an
equivalent  amount had been  invested  for the Trustees in shares of one or more
Oppenheimer funds selected by the Trustee.  The amount paid to the Trustee under
the plan will be determined  based upon the  performance of the selected  funds.
Deferral of Trustees'  fees under the plan will not affect the net assets of the
Fund,  and will not  materially  affect the Fund's  assets,  liabilities  or net
income per share.


                  31   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------


================================================================================
1. Significant Accounting Policies  (continued)
Dividends and  Distributions  to  Shareholders.  Dividends and  distributions to
shareholders,  which are determined in accordance  with income tax  regulations,
are recorded on the ex-dividend date.
--------------------------------------------------------------------------------
Classification  of Distributions to Shareholders.  Net investment  income (loss)
and net  realized  gain  (loss)  may  differ  for  financial  statement  and tax
purposes.  The  character  of  distributions  made  during  the  year  from  net
investment   income  or  net  realized   gains  may  differ  from  its  ultimate
characterization  for  federal  income  tax  purposes.  Also,  due to  timing of
dividend  distributions,  the fiscal year in which amounts are  distributed  may
differ from the fiscal year in which the income or realized gain was recorded by
the Fund.
--------------------------------------------------------------------------------
Expense Offset Arrangements. Expenses paid indirectly represent a reduction of
custodian fees for earnings on cash balances maintained by the Fund.
--------------------------------------------------------------------------------
Other.  Investment  transactions  are accounted  for as of trade date.  Original
issue  discount is accreted and premium is amortized in accordance  with federal
income tax  requirements.  For municipal bonds acquired after April 30, 1993, on
disposition or maturity,  taxable ordinary income is recognized to the extent of
the lesser of gain or market  discount  that would have accrued over the holding
period. Realized gains and losses on investments and unrealized appreciation and
depreciation are determined on an identified cost basis, which is the same basis
used for federal income tax purposes.
               There are certain risks arising from geographic  concentration in
any  state.  Certain  revenue  or tax  related  events in a state may impair the
ability of certain issuers of municipal securities to pay principal and interest
on their obligations.
               The  preparation  of  financial  statements  in  conformity  with
generally accepted  accounting  principles requires management to make estimates
and assumptions  that affect the reported  amounts of assets and liabilities and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements and the reported  amounts of income and expenses during the reporting
period. Actual results could differ from those estimates.


                  32   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
2. Shares of Beneficial Interest
The Fund has authorized an unlimited number of no par value shares of beneficial
interest of each class.  Transactions  in shares of beneficial  interest were as
follows:
<TABLE>
<CAPTION>

                              Year Ended July 31, 1999           Year Ended July
31, 1998
                              -----------------------------
----------------------------
                              Shares          Amount             Shares
Amount
--------------------------------------------------------------------------------------------
Class A:
<S>                           <C>             <C>                <C>
<C>
Sold                           6,301,987      $ 69,153,860        4,625,371     $
50,462,764
Dividends and/or
distributions reinvested         818,090         8,975,978          921,790
10,031,986
Redeemed                      (4,716,845)      (51,726,668)      (5,266,312)
(57,422,196)
                              ----------      ------------       ----------
------------
Net increase                   2,403,232      $ 26,403,170          280,849     $
3,072,554
                              ==========      ============       ==========
============

--------------------------------------------------------------------------------------------
Class B:
Sold                           3,406,294      $ 37,480,696        3,871,772     $
42,232,554
Dividends and/or
distributions reinvested         301,331         3,307,444          279,759
3,046,210
Redeemed                      (1,715,264)      (18,743,584)      (1,120,147)
(12,236,402)
                              ----------      ------------       ----------
------------
Net increase                   1,992,361      $ 22,044,556        3,031,384     $
33,042,362
                              ==========      ============       ==========
============

--------------------------------------------------------------------------------------------
Class C:
Sold                             856,519      $  9,406,000          697,841     $
7,611,935
Dividends and/or
distributions reinvested          37,673           412,830
29,500          320,853
Redeemed                        (335,760)       (3,680,740)        (233,849)
(2,549,961)
                              ----------      ------------       ----------
------------
Net increase                     558,432      $  6,138,090          493,492     $
5,382,827
                              ==========      ============       ==========
============
</TABLE>


================================================================================
3. Unrealized Gains and Losses on Securities
As of July 31, 1999,  net unrealized  appreciation  on securities of $12,166,605
was composed of gross  appreciation  of $18,048,861,  and gross  depreciation of
$5,882,256.


                  33   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------


================================================================================
4. Management Fees and Other Transactions with Affiliates
Management Fees. Management fees paid to the Manager were in accordance with the
investment advisory agreement with the Fund which provides for a fee of 0.60% of
the first  $200  million of average  annual net  assets,  0.55% of the next $100
million,  0.50% of the next $200 million,  0.45% of the next $250 million, 0.40%
of the next $250 million and 0.35% of average  annual net assets in excess of $1
billion.  The Fund's management fees for the year ended July 31, 1999, was 0.55%
of the average annual net assets for each class of shares.
--------------------------------------------------------------------------------
Transfer Agent Fees. OppenheimerFunds Services (OFS), a division of the Manager,
is the  transfer  and  shareholder  servicing  agent  for the Fund and for other
Oppenheimer  funds.  OFS's total costs of providing  such services are allocated
ratably to these funds.
--------------------------------------------------------------------------------
Distribution  and Service Plan Fees. Under its General  Distributor's  Agreement
with the Manager,  the Distributor acts as the Fund's  principal  underwriter in
the continuous public offering of the different classes of shares of the Fund.

The  compensation  paid to (or  retained  by) the  Distributor  from the sale of
shares or on the redemption of shares is shown in the table below for the period
indicated.
<TABLE>
<CAPTION>

                   Aggregate          Class A          Commissions
Commissions           Commissions
                   Front-End          Front-End        On Class A          On Class
B            On Class C
                   Sales Charges      Sales Charges    Shares
Shares                Shares
                   On Class A         Retained by      Advanced by         Advanced
by           Advanced by
Year Ended         Shares             Distributor      Distributor(1)
Distributor(1)        Distributor(1)
---------------------------------------------------------------------------------------------------------------
<S>                <C>                <C>              <C>
<C>                          <C>
July 31, 1999      $924,929           $154,753         $188,991
$1,254,294                   $84,556

1. The Distributor  advances commission payments to dealers for certain sales of
Class A  shares  and for  sales  of  Class B and  Class C  shares  from  its own
resources at the time of sale.

                     Class A                           Class
B                          Class C
                     Contingent Deferred               Contingent
Deferred              Contingent Deferred
                               Sales Charges Sales
Charges                    Sales Charges
Year Ended           Retained by Distributor           Retained by
Distributor          Retained by Distributor
---------------------------------------------------------------------------------------------------------------
July 31, 1999        $--
$291,981                                          $8,385
</TABLE>


      The Fund has  adopted a Service  Plan for Class A shares and  Distribution
and  Service  Plans  for  Class B and  Class C shares  under  Rule  12b-1 of the
Investment  Company Act. Under those plans the Fund pays the Distributor for all
or a portion of its costs incurred in connection  with the  distribution  and/or
servicing of the shares of the particular class.


                  34   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
Class A Service  Plan  Fees.  Under the Class A service  plan,  the  Distributor
currently  uses the fees it receives  from the Fund to pay brokers,  dealers and
other financial institutions. The Class A service plan permits reimbursements to
the Distributor at a rate of up to 0.25% of average annual net assets of Class A
shares. The Distributor makes payments to plan recipients quarterly at an annual
rate not to exceed 0.25% of the average annual net assets  consisting of Class A
shares of the Fund. For the fiscal year ended July 31, 1999,  payments under the
Class A Plan  totaled  $757,647,  all of which  was paid by the  Distributor  to
recipients.  That  included  $25,906 paid to an  affiliate of the  Distributor's
parent company. Any unreimbursed expenses the Distributor incurs with respect to
Class A shares in any fiscal year cannot be recovered in subsequent years.
--------------------------------------------------------------------------------
Class B and Class C Distribution and Service Plan Fees. Under each plan, service
fees and distribution fees are computed on the average of the net asset value of
shares in the  respective  class,  determined  as of the  close of each  regular
business  day during the period.  The Class B and Class C plans  provide for the
Distributor  to  be  compensated  at  a  flat   rate,whether  the  Distributor's
distribution  expenses  are more or less than the amounts paid by the Fund under
the plan during the period for which the fee is paid.
               The Distributor  retains the asset-based  sales charge on Class B
shares.  The Distributor  retains the asset-based sales charge on Class C shares
during the first year the shares are outstanding.  The asset-based sales charges
on Class B and Class C shares allow  investors to buy shares without a front-end
sales charge while  allowing the  Distributor  to  compensate  dealers that sell
those shares.
               The Distributor's  actual expenses in selling Class B and Class C
shares may be more than the payments it receives  from the  contingent  deferred
sales charges collected on redeemed shares and from the Fund under the plans. If
either the Class B or the Class C plan is terminated  by the Fund,  the Board of
Trustees may allow the Fund to continue payments of the asset-based sales charge
to the Distributor for distributing  shares before the plan was terminated.  The
plans allow for the carry-forward of distribution expenses, to be recovered from
asset-based sales charges in subsequent fiscal periods.

Distribution fees paid to the Distributor for the year ended July 31, 1999, were
as follows:
<TABLE>
<CAPTION>

Distributor's             Distributor's

Aggregate                 Unreimbursed

Unreimbursed              Expenses
                           Total Payments            Amount Retained
Expenses                  As % of Net
Class                      Under Plan                By Distributor
Under Plan                Assets of Class
-------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                       <C>
<C>                                 <C>
Class B Plan               $1,294,892                $1,062,283
$4,059,718                          3.06%
-------------------------------------------------------------------------------------------------------------------------
Class C Plan               $  146,564                $   93,541                 $
207,394                          1.23%
</TABLE>


                  35   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------

================================================================================
5. Futures Contracts
The Fund may buy and sell futures  contracts in order to gain  exposure to or to
seek to protect  against  changes in  interest  rates.  The Fund may also buy or
write put or call options on these futures contracts.
               The Fund  generally  sells  futures  contracts  to hedge  against
increases in interest  rates and the resulting  negative  effect on the value of
fixed rate portfolio securities. The Fund may also purchase futures contracts to
gain exposure to changes in interest  rates as it may be more  efficient or cost
effective than actually buying fixed income securities.
               Upon  entering into a futures  contract,  the Fund is required to
deposit  either  cash or  securities  (initial  margin) in an amount  equal to a
certain percentage of the contract value. Subsequent payments (variation margin)
are made or received by the Fund each day.  The  variation  margin  payments are
equal to the daily changes in the contract  value and are recorded as unrealized
gains  and  losses.  The Fund may  recognize  a  realized  gain or loss when the
contract is closed or expires.
               Securities  held in  collateralized  accounts  to  cover  initial
margin  requirements  on open futures  contracts  are noted in the  Statement of
Investments.  The  Statement  of Assets and  Liabilities  reflects a  receivable
and/or payable for the daily mark to market for variation margin.
               Risks of entering into futures  contracts  (and related  options)
include the  possibility  that there may be an illiquid market and that a change
in the value of the  contract or option may not  correlate  with  changes in the
value of the underlying securities.

As of July 31, 1999, the Fund had outstanding futures contracts as follows:
<TABLE>
<CAPTION>

                           Expiration       Number of         Valuation as
of         Unrealized
Contract Description       Date             Contracts         July 31,
1999           Depreciation
--------------------------------------------------------------------------------------------------
Contracts to Sell
-----------------
<S>                        <C>    >         <C>
<C>                           <C>
U.S. Long Bond             9/21/99          205
$23,568,594                   $1,406
</TABLE>


================================================================================
6. Bank Borrowings
The Fund may borrow from a bank for temporary or emergency  purposes  including,
without limitation,  funding of shareholder  redemptions provided asset coverage
for  borrowings  exceeds  300%.  The Fund has entered  into an  agreement  which
enables it to participate with other  Oppenheimer  funds in an unsecured line of
credit with a bank, which permits  borrowings up to $400 million,  collectively.
Interest is charged to each fund,  based on its  borrowings,  at a rate equal to
the  Federal  Funds Rate plus 0.35%.  Borrowings  are payable 30 days after such
loan is  executed.  The Fund  also pays a  commitment  fee equal to its pro rata
share of the  average  unutilized  amount of the  credit  facility  at a rate of
0.0575% per annum.
               The Fund had no borrowings outstanding during the year ended July
31, 1999.


                  36   Oppenheimer California Municipal Fund

<PAGE>


<PAGE>


                                       A-4
Appendi
x A

--------------------------------------------------------------------------------
                 Descriptions of Municipal Bond Ratings Categories
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Of Principal Rating Agencies
--------------------------------------------------------------------------------

Municipal Bonds

Moody's Investor Services,  Inc. The ratings of Moody's Investors Service,  Inc.
("Moody's") for municipal bonds are Aaa, Aa, A, Baa, Ba, B, Caa, Ca and C. Those
bonds in the Aa, A, Baa,  Ba and B groups  which  Moody's  believes  possess the
strongest  investment  attributes  are  designated  Aa1,  A1,  Baa1,  Ba1 and B1
respectively.

|_| Aaa. Municipal bonds rated "Aaa" are judged to be of the "best quality." |_|
Aa. The rating "Aa" is  assigned  to bonds which are judged of "high  quality by
all  standards,"  but as to which margins of  protection or other  elements make
long-term risks appear somewhat larger than "Aaa" rated municipal  bonds.  "Aaa"
and "Aa" rated bonds are generally known as "high grade bonds." |_| A. Municipal
bonds rated "A" by Moody's possess many favorable investment  attributes and are
considered  "upper  medium  grade  obligations."   Factors  giving  security  to
principal and interest of A rated bonds are  considered  adequate,  but elements
may be present which suggest a susceptibility  to impairment at some time in the
future.
|_| Baa. Municipal bonds rated "Baa" are considered "medium grade"  obligations.
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. These bonds lack outstanding investment characteristics and have
speculative characteristics as well.
|_| Ba. Bonds 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  rated  "B"  generally  lack  characteristics  of  the  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 rated "Caa" are in poor  standing.  Such issues may be in default or there
may be present elements of danger with respect to principal or interest. |_| Ca.
Bonds rated "Ca" represent  obligations  which are speculative in a high degree.
Such issues are often in default or have other marked shortcomings. |_| C. Bonds
rated "C" are the lowest  rated class of bonds.  Issues so rated can be regarded
as  having  extremely  poor  prospects  of ever  attaining  any real  investment
standing.

      Municipal  bonds rated by Moody's that have a demand feature that provides
the holder with the ability to  periodically  tender  ("put") the portion of the
debt covered by the demand feature,  may also have a short-term  rating assigned
to such  demand  feature.  The  short-term  rating  uses the  symbol  "VMIG"  to
distinguish  characteristics  that include  payment upon periodic  demand rather
than fund or scheduled  maturity  dates and  potential  reliance  upon  external
liquidity,  as  well  as  other  factors.  The  highest  investment  quality  is
designated by the VMIG 1 rating and the lowest by VMIG 4.


Standard & Poor's Corporation.  Bonds rated in the top four categories (AAA, AA,
A, BBB) are commonly  referred to as "investment  grade." 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.  Ratings of BB, B, CCC and CC are
regarded as having significant speculative characteristics.

|_| AAA.  Obligors of municipal bonds rated AAA have "extremely strong capacity"
to meet financial  commitments.  |_| AA. The rating AA is given to obligors with
"very strong capacity" to meet financial commitments.
|_| A. The  rating  A is given to  obligors  with a  "strong  capacity"  to meet
financial  commitments  but is somewhat more  susceptible to adverse  effects of
changes  in  circumstances  and  economic  conditions  than  obligors  in higher
categories.  |_| BBB. The BBB rating is given to an obligor  that has  "adequate
capacity"  to  meet  its  financial  commitments.   However,   adverse  economic
conditions  or  changing  circumstances  are more  likely to lead to a  weakened
capacity of the obligor to meet its financial commitments.
|_| BB.  Obligors  rated BB are less  vulnerable  in the  near-term  than  other
lower-rated  obligations to default than other speculative issues. However, they
face major ongoing uncertainties or exposure to adverse business,  financial, or
economic  conditions  which would lead to inadequate  capacity to meet financial
commitments.
|_| B. Obligors rated B have a greater vulnerability than obligors rated BB, but
currently has the capacity to meet its financial commitments.  Adverse business,
financial,  or economic  conditions will likely impair the obligor's capacity or
willingness to meet its financial commitments.
|_| CCC.  Obligors  rated CCC are currently  vulnerable  and are dependent  upon
favorable  business,  financial,  and  economic  conditions  to  meet  financial
commitments.
|_| CC. Obligors rated CC are currently highly vulnerable.
|_| C. Bonds  rated C  typically  are 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.
|_| D. Bonds rated D are 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 the grace  period.  The D rating also will be used upon the
filing of a bankruptcy petition if debt service payments are jeopardized. Fitch.
The ratings of Fitch IBCA,  Inc. for municipal bonds are AAA, AA, A, BBB, BB, B,
CCC, CC, C, DDD, DD, and D. Bonds rated AAA, AA, A and BBB are  considered to be
of  investment  grade  quality.  Bonds rated below BBB are  considered  to be of
speculative quality.
|_| AAA.  Municipal  Bonds  rated AAA are  judged to be of the  "highest  credit
quality."  |_| AA. The rating of AA is  assigned  to bonds of "very high  credit
quality." |_| A.  Municipal  bonds rated A are  considered to be of "high credit
quality." |_| BBB. The rating BBB is assigned to bonds of  "satisfactory  credit
quality."  A and BBB rated  bonds are more  vulnerable  to  adverse  changes  in
economic conditions than bonds with higher ratings.
|_| BB. The rating BB is assigned to bonds considered to be  "speculative."  |_|
B. The rating B is assigned to bonds considered to be "highly  speculative." |_|
CCC. Bonds rated CCC have certain  identifiable  characteristics  which,  if not
remedied, may lead to default.
|_| CC. Bonds rated CC are considered minimally protected. Default in payment of
interest and/or  principal seems probable over time. |_| C. Bonds rated C are in
imminent default in payment of interest or principal.
|_| DDD and below.  Bonds rated DDD, DD and D are in default on interest  and/or
principal  payments.  DDD represents the highest potential for recovery on these
bonds, and D represents the lowest potential for recovery.

Duff & Phelps. The ratings of Duff & Phelps are as follows:
|_| AAA. These are judged to be the "highest credit  quality".  The risk factors
are negligible,  being only slightly more than for risk-free U.S. Treasury debt.
|_| AA+, AA & AA-. High credit quality.  Protection factors are strong.  Risk is
modest but may vary slightly  from time to time because of economic  conditions.
|_| A+, A & A-.  Protection  factors  are average but  adequate.  However,  risk
factors are more variable and greater in periods of economic  stress.  |_| BBB+,
BBB & BBB-. These have below average protection factors but are still considered
sufficient for prudent  investment.  They have considerable  variability in risk
during economic cycles.
|_| BB+, BB & BB-. These are below investment grade but are deemed to be able to
meet obligations when due. Present or prospective  financial  protection factors
fluctuate according to industry conditions or company fortunes.  Overall quality
may move up or down frequently within the category.
|_| B+,  B & B-.  These  are  below  investment  grade  and  possess  risk  that
obligations  will  not  be met  when  due.  Financial  protection  factors  will
fluctuate  widely  according  to economic  cycles,  industry  conditions  and/or
company  fortunes.  Potential  exists for frequent  changes in the rating within
this category or into a higher of lower rating grade.
|_| CCC. Well below investment grade securities. Considerable uncertainty exists
as to timely payment of principal  interest or preferred  dividends.  Protection
factors  are  narrow  and  risk can be  substantial  with  unfavorable  economic
industry conditions, and/or with unfavorable company developments.
|_| DD.  These  are  defaulted  debt  obligations.  The  issuer  failed  to meet
scheduled principal and/or interest payments.

Municipal Notes

Moody's.  Moody's  ratings for state and  municipal  notes and other  short-term
loans are  designated  Moody's  Investment  Grade  ("MIG").  Notes  bearing  the
designation  MIG-1 are of the best  quality,  enjoying  strong  protection  from
established  cash flows of funds for their  servicing  or from  established  and
broad-based  access to the market for financing.  Notes bearing the  designation
"MIG-2" are of high quality with ample  margins of  protection,  although not as
large as notes rated "MIG-1." Such  short-term  notes that have demand  features
may also  carry a rating  using the symbol  VMIG as  described  above,  with the
designation  MIG-1/VMIG 1 denoting best quality, with superior liquidity support
in addition to those characteristics attributable to the designation MIG-1.

Standard & Poor's.  S&P's ratings for municipal notes due in three years or less
are SP-1,  SP-2, and SP-3. SP-1 describes  issues with a very strong capacity to
pay  principal  and interest and compares with bonds rated A by S&P. If modified
by a plus sign, it compares  with bonds rated AA or AAA by S&P.  SP-2  describes
issues with a satisfactory capacity to pay principal and interest,  and compares
with bonds  rated BBB by S&P.  SP-3  describes  issues  that have a  speculative
capacity to pay principal and interest.


Fitch.  Fitch's rating for municipal  notes due in three years or less are F-1+,
F-1,  F-2, F-3, F-S and D. F-1+  describes  notes with an  exceptionally  strong
credit  quality and the strongest  degree of assurance for timely  payment.  F-1
describes  notes with a very  strong  credit  quality  and  assurance  of timely
payment is only  slightly  less in degree than issues rated F-1+.  F-2 describes
notes with a good credit quality and a satisfactory assurance of timely payment,
but the  margin  of  safety  is not as great  for  issues  assigned  F-1+ or F-1
ratings.  F-3  describes  notes  with  a fair  credit  quality  and an  adequate
assurance of timely  payment,  but  near-term  adverse  changes could cause such
securities to be rated below  investment  grade.  F-S describes  notes with weak
credit quality. Issues rated D are in actual or imminent payment default.

Corporate Debt

      The  other  debt  securities  included  in  the  definition  of  temporary
defensive  investments the Fund may hold are corporate (as opposed to municipal)
debt  obligations.  The  Moody's,  S&P and Fitch  corporate  debt ratings do not
differ materially from those set forth above for municipal bonds.
Commercial Paper

Moody's.  The  ratings of  commercial  paper by Moody's  are  Prime-1,  Prime-2,
Prime-3  and Not Prime.  Issuers  rated  Prime-1  have a superior  capacity  for
repayment of  short-term  promissory  obligations.  Issuers rated Prime-2 have a
strong  capacity for repayment of  short-term  promissory  obligations.  Issuers
rated Prime-3 have an acceptable capacity for repayment of short-term promissory
obligations.  Issuers rated Not Prime do not fall within any of the Prime rating
categories.

S&P. The ratings of commercial  paper by S&P are A-1, A-2, A-3, B, C, and D. A-1
indicates  that the degree of safety  regarding  timely  payment is strong.  A-2
indicates  capacity for timely payment is  satisfactory.  However,  the relative
degree of safety is not as high as for issues  designated  A-1. A-3 indicates an
adequate  capacity  for  timely  payments.   These  issues  are,  however,  more
vulnerable to the adverse effects of changes in  circumstances  than obligations
carrying the higher  designations.  B indicates  only  speculative  capacity for
timely payment.  C indicates a doubtful  capacity for payment.  D is assigned to
issues in default.

Fitch.  The ratings of  commercial  paper by Fitch are similar to its ratings of
Municipal Notes, above.



<PAGE>


                                       B-1

                                   Appendix B

                     Municipal Bond Industry Classifications

Adult Living Facilities
Bond Anticipation Notes
Education
Electric Utilities
Gas Utilities
General Obligation
Higher Education
Highways/Railways
Hospital/Healthcare
Manufacturing, Durable Goods
Manufacturing, Non Durable Goods
Marine/Aviation Facilities
Multi-Family Housing
Municipal Leases
Non Profit  Organization
Parking Fee Revenue
Pollution Control
Resource Recovery
Revenue  Anticipation  Notes
Sales Tax Revenue
Sewer Utilities
Single Family Housing
Special  Assessment
Special Tax
Sports  Facility  Revenue
Student Loans
Tax Anticipation Notes
Tax & Revenue  Anticipation Notes
Telephone Utilities
Water Utilities






<PAGE>


                                      C-15
                                   Appendix C

           OppenheimerFunds Special Sales Charge Arrangements and Waivers

In certain cases,  the initial sales charge that applies to purchases of Class A
shares1 of the  Oppenheimer  funds or the contingent  deferred sales charge that
may apply to Class A, Class B or Class C shares may be waived.2  That is because
of the  economies of sales  efforts  realized by  OppenheimerFunds  Distributor,
Inc.,  (referred  to in this  document as the  "Distributor"),  or by dealers or
other  financial  institutions  that offer  those  shares to certain  classes of
investors.

Not all waivers apply to all funds. For example,  waivers relating to Retirement
Plans do not apply to Oppenheimer municipal funds, because shares of those funds
are not  available  for  purchase  by or on behalf of  retirement  plans.  Other
waivers apply only to shareholders of certain funds.

For the purposes of some of the waivers  described  below and in the  Prospectus
and Statement of Additional Information of the applicable Oppenheimer funds, the
term  "Retirement  Plan"  refers  to the  following  types of  plans:  (1) plans
qualified under Sections 401(a) or 401(k) of the Internal Revenue
         Code,
(2) non-qualified  deferred  compensation plans, (3) employee benefit plans3 (4)
Group  Retirement  Plans4 (5) 403(b)(7)  custodial  plan accounts (6) Individual
Retirement Accounts ("IRAs"), including traditional IRAs, Roth
         IRAs, SEP-IRAs, SARSEPs or SIMPLE plans

The  interpretation  of these  provisions as to the  applicability  of a special
arrangement  or waiver in a  particular  case is in the sole  discretion  of the
Distributor or the transfer agent (referred to in this document as the "Transfer
Agent")  of  the  particular   Oppenheimer   fund.  These  waivers  and  special
arrangements  may be amended or terminated at any time by a particular fund, the
Distributor, and/or OppenheimerFunds,  Inc. (referred to in this document as the
"Manager"). Waivers that apply at the time shares are redeemed must be requested
by the shareholder and/or dealer in the redemption request.

--------------
1.    Certain waivers also apply to Class M shares of Oppenheimer Convertible
   Securities Fund.
2. In the case of Oppenheimer Senior Floating Rate Fund, a  continuously-offered
   closed-end  fund,  references to contingent  deferred  sales charges mean the
   Fund's  Early  Withdrawal   Charges  and  references  to  "redemptions"  mean
   "repurchases" of shares.
3. An "employee  benefit plan" means any plan or arrangement,  whether or not it
   is "qualified" under the Internal Revenue Code, under which Class A shares of
   an  Oppenheimer  fund  or  funds  are  purchased  by  a  fiduciary  or  other
   administrator  for the account of participants  who are employees of a single
   employer or of affiliated employers.  These may include, for example, medical
   savings accounts, payroll deduction plans or similar plans. The fund accounts
   must be registered in the name of the fiduciary or  administrator  purchasing
   the shares for the benefit of participants in the plan.
4. The term  "Group  Retirement  Plan"  means  any  qualified  or  non-qualified
   retirement  plan  for  employees  of a  corporation  or sole  proprietorship,
   members and  employees of a partnership  or  association  or other  organized
   group of persons  (the  members of which may include  other  groups),  if the
   group has made special  arrangements  with the Distributor and all members of
   the group  participating  in (or who are eligible to participate in) the plan
   purchase  Class A shares  of an  Oppenheimer  fund or funds  through a single
   investment dealer,  broker or other financial  institution  designated by the
   group.  Such plans  include 457 plans,  SEP-IRAs,  SARSEPs,  SIMPLE plans and
   403(b) plans other than plans for public  school  employees.  The term "Group
   Retirement Plan" also includes  qualified  retirement plans and non-qualified
   deferred  compensation  plans  and IRAs  that  purchase  Class A shares of an
   Oppenheimer fund or funds through a single investment dealer, broker or other
   financial institution that has made special arrangements with the Distributor
   enabling  those  plans to  purchase  Class A shares  at net  asset  value but
   subject to the Class A contingent deferred sales charge.

I. Applicability of Class A Contingent Deferred Sales Charges in Certain Cases

Purchases of Class A Shares of Oppenheimer Funds That Are Not Subject to Initial
Sales Charge but May Be Subject to the Class A Contingent  Deferred Sales Charge
(unless a waiver applies).

      There is no initial  sales charge on purchases of Class A shares of any of
the Oppenheimer funds in the cases listed below. However, these purchases may be
subject to the Class A contingent  deferred  sales charge if redeemed  within 18
months of the end of the calendar month of their  purchase,  as described in the
Prospectus (unless a waiver described  elsewhere in this Appendix applies to the
redemption).  Additionally,  on shares  purchased  under these  waivers that are
subject to the Class A contingent  deferred sales charge,  the Distributor  will
pay the  applicable  commission  described  in the  Prospectus  under  "Class  A
Contingent Deferred Sales Charge."2 This waiver provision applies to:

2 However, that commission will not be paid on purchases of shares in amounts of
$1 million or more  (including any right of  accumulation)  by a Retirement Plan
that pays for the purchase with the redemption proceeds of Class C shares of one
or more Oppenheimer funds held by the Plan for more than one year.

|_| Purchases of Class A shares aggregating $1 million or more.
|_|  Purchases  by a Retirement  Plan (other than an IRA or 403(b)(7)  custodial
     plan) that:

(1)   buys shares costing $500,000 or more, or
(2)   has, at the time of purchase, 100 or more eligible employees or total plan
         assets of $500,000 or more, or
(3)      certifies  to the  Distributor  that it  projects  to have  annual plan
         purchases of $200,000 or more.
|_|      Purchases  by  an  OppenheimerFunds-sponsored   Rollover  IRA,  if  the
         purchases are made:
(1)      through a broker,  dealer,  bank or registered  investment adviser that
         has made special arrangements with the Distributor for those purchases,
         or
(2)      by a direct rollover of a distribution from a qualified Retirement Plan
         if the  administrator of that Plan has made special  arrangements  with
         the Distributor for those purchases.
|_|      Purchases  of Class A shares by  Retirement  Plans that have any of the
         following record-keeping arrangements:

(1) The record keeping is performed by Merrill Lynch Pierce Fenner & Smith, Inc.
          ("Merrill  Lynch") on a daily valuation basis for the Retirement Plan.
          On  the  date  the  plan  sponsor  signs  the  record-keeping  service
          agreement with Merrill Lynch, the Plan must have $3 million or more of
          its assets  invested in (a) mutual funds,  other than those advised or
          managed by Merrill Lynch Asset  Management,  L.P.  ("MLAM"),  that are
          made available under a Service Agreement between Merrill Lynch and the
          mutual fund's  principal  underwriter  or  distributor,  and (b) funds
          advised or managed  by MLAM (the  funds  described  in (a) and (b) are
          referred to as "Applicable Investments").

(2) The record keeping for the Retirement Plan is performed on a daily valuation
          basis by a record keeper whose  services are provided under a contract
          or arrangement  between the Retirement  Plan and Merrill Lynch. On the
          date the plan sponsor signs the record keeping service  agreement with
          Merrill  Lynch,  the Plan must have $3  million  or more of its assets
          (excluding   assets  invested  in  money  market  funds)  invested  in
          Applicable  Investments.  (3) The record keeping for a Retirement Plan
          is handled  under a service  agreement  with Merrill  Lynch and on the
          date the plan sponsor signs that  agreement,  the Plan has 500 or more
          eligible employees (as determined by the Merrill Lynch plan conversion
          manager). |_| Purchases by a Retirement Plan whose record keeper had a
          cost-allocation  agreement with the Transfer Agent on or before May 1,
          1999.


<PAGE>


             II. Waivers of Class A Sales Charges of Oppenheimer Funds

A.  Waivers of Initial and Contingent Deferred Sales Charges for Certain
Purchasers.

Class A shares purchased by the following investors are not subject to any Class
A sales  charges  (and  no  commissions  are  paid  by the  Distributor  on such
purchases):

|_| The Manager or its affiliates.
|_|       Present or former officers, directors, trustees and employees (and
          their  "immediate   families")  of  the  Fund,  the  Manager  and  its
          affiliates,  and  retirement  plans  established  by  them  for  their
          employees.  The  term  "immediate  family"  refers  to  one's  spouse,
          children,   grandchildren,   grandparents,   parents,  parents-in-law,
          brothers and sisters, sons- and daughters-in-law,  a sibling's spouse,
          a spouse's siblings,  aunts, uncles, nieces and nephews;  relatives by
          virtue  of  a  remarriage  (step-children,   step-parents,  etc.)  are
          included.
|_|      Registered  management  investment  companies,  or separate accounts of
         insurance  companies  having  an  agreement  with  the  Manager  or the
         Distributor for that purpose.
|_|      Dealers or brokers that have a sales agreement with the Distributor, if
         they purchase shares for their own accounts or for retirement plans for
         their employees.
|_|      Employees and registered representatives (and their spouses) of dealers
         or brokers described above or financial  institutions that have entered
         into sales  arrangements  with such  dealers or brokers  (and which are
         identified as such to the  Distributor)  or with the  Distributor.  The
         purchaser must certify to the  Distributor at the time of purchase that
         the purchase is for the  purchaser's own account (or for the benefit of
         such employee's spouse or minor children).
|_|      Dealers,  brokers,  banks or registered  investment  advisors that have
         entered into an agreement with the Distributor  providing  specifically
         for the use of shares  of the Fund in  particular  investment  products
         made  available  to their  clients.  Those  clients  may be  charged  a
         transaction  fee by  their  dealer,  broker,  bank or  advisor  for the
         purchase or sale of Fund shares.
|_|      Investment  advisors  and  financial  planners who have entered into an
         agreement  for this  purpose  with the  Distributor  and who  charge an
         advisory, consulting or other fee for their services and buy shares for
         their own accounts or the accounts of their clients.
|_|      "Rabbi trusts" that buy shares for their own accounts, if the purchases
         are made through a broker or agent or other financial intermediary that
         has made special arrangements with the Distributor for those purchases.
|_|       Clients of investment  advisors or financial  planners  (that have
          entered into an agreement for this purpose with the  Distributor)  who
          buy shares for their own accounts  may also  purchase  shares  without
          sales charge but only if their accounts are linked to a master account
          of their  investment  advisor  or  financial  planner on the books and
          records of the broker, agent or financial  intermediary with which the
          Distributor  has  made  such  special  arrangements  . Each  of  these
          investors  may be  charged  a fee by the  broker,  agent or  financial
          intermediary for purchasing shares.

|_|      Directors,  trustees, officers or full-time employees of OpCap Advisors
         or its  affiliates,  their  relatives  or any  trust,  pension,  profit
         sharing or other benefit plan which  beneficially owns shares for those
         persons.
|_|      Accounts  for  which  Oppenheimer  Capital  (or its  successor)  is the
         investment   advisor   (the   Distributor   must  be  advised  of  this
         arrangement)  and persons who are  directors or trustees of the company
         or trust which is the beneficial owner of such accounts.
|_|      A unit investment trust that has entered into an appropriate  agreement
         with the Distributor.
|_|      Dealers,  brokers,  banks, or registered  investment advisers that have
         entered  into an  agreement  with the  Distributor  to sell  shares  to
         defined  contribution  employee  retirement plans for which the dealer,
         broker or investment adviser provides administration services.
|_|      Retirement  Plans and  deferred  compensation  plans and trusts used to
         fund those plans  (including,  for example,  plans qualified or created
         under sections  401(a),  401(k),  403(b) or 457 of the Internal Revenue
         Code), in each case if those purchases are made through a broker, agent
         or other financial intermediary that has made special arrangements with
         the Distributor for those purchases.
|_|      A  TRAC-2000  401(k)  plan  (sponsored  by the  former  Quest for Value
         Advisors)  whose Class B or Class C shares of a Former  Quest for Value
         Fund  were  exchanged  for  Class  A  shares  of that  Fund  due to the
         termination  of the Class B and Class C  TRAC-2000  program on November
         24, 1995.
|_|      A qualified  Retirement  Plan that had agreed with the former Quest for
         Value Advisors to purchase  shares of any of the Former Quest for Value
         Funds  at  net  asset  value,  with  such  shares  to be  held  through
         DCXchange,  a sub-transfer  agency mutual fund  clearinghouse,  if that
         arrangement was  consummated and share purchases  commenced by December
         31, 1996.

B.  Waivers of Initial and Contingent Deferred Sales Charges in Certain
Transactions.

Class A shares issued or purchased in the following transactions are not subject
to  sales  charges  (and no  commissions  are  paid by the  Distributor  on such
purchases): |_| Shares issued in plans of reorganization, such as mergers, asset
acquisitions
         and exchange offers, to which the Fund is a party.
|_|   Shares purchased by the reinvestment of dividends or other distributions
         reinvested  from  the  Fund or  other  Oppenheimer  funds  (other  than
         Oppenheimer  Cash  Reserves)  or  unit  investment   trusts  for  which
         reinvestment arrangements have been made with the Distributor.
[_|       Shares purchased  through a broker-dealer  that has entered into a
          special agreement with the Distributor to allow the broker's customers
          to purchase and pay for shares of Oppenheimer funds using the proceeds
          of shares redeemed in the prior 30 days from a mutual fund (other than
          a fund managed by the Manager or any of its  subsidiaries) on which an
          initial  sales charge or  contingent  deferred  sales charge was paid.
          This waiver also applies to shares  purchased by exchange of shares of
          Oppenheimer  Money Market Fund,  Inc. that were purchased and paid for
          in this manner.  This waiver must be requested when the purchase order
          is placed  for shares of the Fund,  and the  Distributor  may  require
          evidence of qualification for this waiver.
|_|      Shares  purchased with the proceeds of maturing  principal units of any
         Qualified Unit Investment Liquid Trust Series.
|_|      Shares   purchased  by  the   reinvestment  of  loan  repayments  by  a
         participant in a Retirement  Plan for which the Manager or an affiliate
         acts as sponsor.

C.  Waivers of the Class A Contingent Deferred Sales Charge for Certain
Redemptions.

The Class A contingent deferred sales charge is also waived if shares that would
otherwise be subject to the contingent deferred sales charge are redeemed in the
following cases:
|_|      To make Automatic Withdrawal Plan payments that are limited annually to
         no more than 12% of the account value  measured at the time the Plan is
         established, adjusted annually.
|_|      Involuntary  redemptions  of shares by operation of law or  involuntary
         redemptions of small  accounts  (please refer to  "Shareholder  Account
         Rules and Policies," in the applicable fund Prospectus).
|_|      For distributions from Retirement Plans, deferred compensation plans or
         other employee benefit plans for any of the following purposes:
(1)         Following  the  death or  disability  (as  defined  in the  Internal
            Revenue  Code)  of the  participant  or  beneficiary.  The  death or
            disability   must  occur   after  the   participant's   account  was
            established.
(2)   To return excess contributions.
(3)   To return contributions made due to a mistake of fact.
(4)   Hardship withdrawals, as defined in the plan.3

3 This provision does not apply to IRAs.

(5)   Under a Qualified Domestic Relations Order, as defined in the Internal
            Revenue  Code,  or, in the case of an IRA, a divorce  or  separation
          agreement described in Section 71(b) of the Internal Revenue Code.
(6)  To meet the minimum distribution requirements of the Internal Revenue Code.
(7)  To make "substantially equal periodic payments" as described in Section
     72(t) of the Internal Revenue Code.
(8)   For loans to participants or beneficiaries.
(9)   Separation from service.4

4 This provision does not apply to 403(b)(7)  custodial plans if the participant
is less than age 55, nor to IRAs.

(10) Participant-directed  redemptions  to purchase  shares of a mutual fund
     (other than a fund managed by the Manager or a  subsidiary  of the Manager)
     if the plan has made special arrangements with the Distributor.

 (11) Plan  termination  or  "in-service  distributions,"  if the redemption
     proceeds are rolled over directly to an OppenheimerFunds-sponsored IRA.

|_|      For  distributions  from  Retirement  Plans having 500 or more eligible
         employees,  except  distributions  due  to  termination  of  all of the
         Oppenheimer funds as an investment option under the Plan.
|_|      For distributions  from 401(k) plans sponsored by  broker-dealers  that
         have entered into a special  agreement  with the  Distributor  allowing
         this waiver.


       III. Waivers of Class B and Class C Sales Charges of Oppenheimer Funds

    The  Class B and  Class C  contingent  deferred  sales  charges  will not be
applied to shares  purchased  in certain  types of  transactions  or redeemed in
certain circumstances described below.

A.  Waivers for Redemptions in Certain Cases.

The Class B and Class C  contingent  deferred  sales  charges will be waived for
redemptions of shares in the following cases: |_| Shares redeemed involuntarily,
as described in "Shareholder Account Rules and
         Policies," in the applicable Prospectus.
|_|      Redemptions  from accounts other than  Retirement  Plans  following the
         death or  disability  of the last  surviving  shareholder,  including a
         trustee  of a grantor  trust or  revocable  living  trust for which the
         trustee is also the sole beneficiary. The death or disability must have
         occurred after the account was established, and for disability you must
         provide  evidence  of a  determination  of  disability  by  the  Social
         Security Administration.
|_|      Distributions  from accounts for which the  broker-dealer of record has
         entered into a special  agreement  with the  Distributor  allowing this
         waiver.
|_|      Redemptions  of Class B shares held by  Retirement  Plans whose records
         are  maintained  on a daily  valuation  basis  by  Merrill  Lynch or an
         independent record keeper under a contract with Merrill Lynch.
|_|      Redemptions of Class C shares of Oppenheimer U.S. Government Trust from
         accounts of clients of financial  institutions that have entered into a
         special arrangement with the Distributor for this purpose.
|_|      Redemptions  requested in writing by a Retirement Plan sponsor of Class
         C shares of an  Oppenheimer  fund in amounts of $1 million or more held
         by the  Retirement  Plan for  more  than one  year,  if the  redemption
         proceeds  are  invested  in Class A shares  of one or more  Oppenheimer
         funds.
|_|      Distributions from Retirement Plans or other employee benefit plans for
         any of the following purposes:
(1)             Following  the death or  disability  (as defined in the Internal
                Revenue Code) of the  participant or  beneficiary.  The death or
                disability  must  occur  after  the  participant's  account  was
                established in an Oppenheimer fund.
(2)   To return excess contributions made to a participant's account.
(3)   To return contributions made due to a mistake of fact.

(4)   To make hardship withdrawals, as defined in the plan.5

5 This provision does not apply to IRAs.

(5)  To make  distributions  required under a Qualified  Domestic  Relations
     Order  or,  in the  case of an  IRA,  a  divorce  or  separation  agreement
     described in Section 71(b) of the Internal Revenue Code.

(6)  To meet the minimum distribution requirements of the Internal Revenue Code.

(7) To make "substantially equal periodic payments" as described in Section
     72(t) of the Internal Revenue Code.

(8)   For loans to participants or beneficiaries.6
6 This provision does not apply to loans from 403(b)(7) custodial plans.

(9)   On account of the participant's separation from service.7
7 This provision does not apply to 403(b)(7)  custodial plans if the participant
is less than age 55, nor to IRAs.


(10)            Participant-directed  redemptions to purchase shares of a mutual
                fund (other than a fund  managed by the Manager or a  subsidiary
                of the Manager) offered as an investment  option in a Retirement
                Plan  if  the  plan  has  made  special  arrangements  with  the
                Distributor.
(11)            Distributions   made  on  account  of  a  plan   termination  or
                "in-service"  distributions,"  if the  redemption  proceeds  are
                rolled over directly to an OppenheimerFunds-sponsored IRA.
(12)            Distributions  from Retirement Plans having 500 or more eligible
                employees,  but  excluding  distributions  made  because  of the
                Plan's  elimination as investment  options under the Plan of all
                of the Oppenheimer funds that had been offered.
(13)            For  distributions   from  a  participant's   account  under  an
                Automatic  Withdrawal Plan after the participant  reaches age 59
                1/2, as long as the aggregate  value of the  distributions  does
                not exceed 10% of the account's  value  annually  (measured from
                the establishment of the Automatic Withdrawal Plan).
         |_|Redemptions  of Class B shares or Class C shares  under an Automatic
            Withdrawal  Plan from an account other than a Retirement Plan if the
            aggregate  value of the  redeemed  shares does not exceed 10% of the
            account's value annually.

B.  Waivers for Shares Sold or Issued in Certain Transactions.

The  contingent  deferred  sales  charge  is also  waived on Class B and Class C
shares sold or issued in the following  cases: |_| Shares sold to the Manager or
its affiliates.
|_|      Shares sold to registered  management  investment companies or separate
         accounts of insurance companies having an agreement with the Manager or
         the Distributor for that purpose.
|_| Shares issued in plans of  reorganization  to which the Fund is a party. |_|
Shares sold to present or former officers, directors, trustees or employees
        (and their "immediate families" as defined above in Section I.A.) of the
        Fund, the Manager and its affiliates and retirement plans established by
         them for their employees.


IV. Special Sales Charge  Arrangements for  Shareholders of Certain  Oppenheimer
          Funds Who Were Shareholders of Former Quest for Value Funds

The initial and contingent  deferred sales charge rates and waivers for Class A,
Class  B and  Class  C  shares  described  in the  Prospectus  or  Statement  of
Additional  Information of the Oppenheimer funds are modified as described below
for certain  persons who were  shareholders of the former Quest for Value Funds.
To be eligible,  those persons must have been shareholders on November 24, 1995,
when OppenheimerFunds,  Inc. became the investment advisor to those former Quest
for Value Funds. Those funds include:



<PAGE>


  Oppenheimer Quest Value Fund, Inc.    Oppenheimer   Quest   Small   Cap
                                        Value Fund
  Oppenheimer Quest Balanced Value Fund Oppenheimer  Quest  Global  Value
                                      Fund
  Oppenheimer  Quest  Opportunity Value
  Fund

      These  arrangements also apply to shareholders of the following funds when
they merged (were  reorganized)  into various  Oppenheimer funds on November 24,
1995:

  Quest   for  Value   U.S.   Government Quest for  Value  New York  Tax-Exempt
Income Fund                              Fund
  Quest  for  Value  Investment  Quality Quest  for Value  National  Tax-Exempt
Income Fund                              Fund
  Quest for Value Global Income Fund     Quest for Value California  Tax-Exempt
                                      Fund

      All of the funds  listed  above are  referred  to in this  Appendix as the
"Former Quest for Value Funds." The waivers of initial and  contingent  deferred
sales charges  described in this Appendix apply to shares of an Oppenheimer fund
that are either:
|_|      acquired  by such  shareholder  pursuant to an exchange of shares of an
         Oppenheimer fund that was one of the Former Quest for Value Funds or
|_|      purchased  by  such  shareholder  by  exchange  of  shares  of  another
         Oppenheimer  fund that were  acquired  pursuant to the merger of any of
         the Former  Quest for Value Funds into that other  Oppenheimer  fund on
         November 24, 1995.

A.  Reductions or Waivers of Class A Sales Charges.

      |X| Reduced  Class A Initial  Sales Charge Rates for Certain  Former Quest
for Value Funds Shareholders.

Purchases by Groups and Associations. The following table sets forth the initial
sales  charge rates for Class A shares  purchased  by members of  "Associations"
formed for any purpose other than the purchase of  securities.  The rates in the
table apply if that Association  purchased shares of any of the Former Quest for
Value Funds or received a proposal to purchase such shares from OCC Distributors
prior to November 24, 1995.

--------------------------------------------------------------------------------
                           Initial Sales Initial Sales
Number  of  Eligible Charge  as  a %  of Charge  as  a %  of Commission   as  %
Employees or Members Offering Price      Net Amount Invested of Offering Price
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
9 or Fewer                  2.50%               2.56%              2.00%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
At  least 10 but not        2.00%               2.04%              1.60%
more than 49
--------------------------------------------------------------------------------

      For  purchases by  Associations  having 50 or more  eligible  employees or
members,  there is no initial  sales charge on purchases of Class A shares,  but
those  shares  are  subject  to the Class A  contingent  deferred  sales  charge
described in the applicable fund's Prospectus.

      Purchases made under this arrangement  qualify for the lower of either the
sales charge rate in the table based on the number of members of an Association,
or the sales charge rate that applies under the Right of Accumulation  described
in the applicable  fund's  Prospectus  and Statement of Additional  Information.
Individuals who qualify under this arrangement for reduced sales charge rates as
members  of  Associations  also may  purchase  shares  for their  individual  or
custodial  accounts at these  reduced  sales charge  rates,  upon request to the
Distributor.
      |X| Waiver of Class A Sales  Charges  for  Certain  Shareholders.  Class A
shares  purchased  by the  following  investors  are not  subject to any Class A
initial or contingent deferred sales charges:
|_|      Shareholders  who  were  shareholders  of the AMA  Family  of  Funds on
         February  28, 1991 and who  acquired  shares of any of the Former Quest
         for Value Funds by merger of a portfolio of the AMA Family of Funds.
|_|      Shareholders  who acquired shares of any Former Quest for Value Fund by
         merger of any of the portfolios of the Unified Funds.

      |X|  Waiver  of  Class A  Contingent  Deferred  Sales  Charge  in  Certain
Transactions.  The Class A  contingent  deferred  sales charge will not apply to
redemptions  of Class A shares  purchased by the  following  investors  who were
shareholders of any Former Quest for Value Fund:

      Investors  who  purchased  Class A shares from a dealer that is or was not
permitted  to receive a sales load or  redemption  fee imposed on a  shareholder
with  whom  that  dealer  has  a  fiduciary  relationship,  under  the  Employee
Retirement Income Security Act of 1974 and regulations adopted under that law.

B.  Class A, Class B and Class C Contingent Deferred Sales Charge Waivers.

      |X| Waivers for Redemptions of Shares Purchased Prior to March 6, 1995. In
the following  cases,  the  contingent  deferred sales charge will be waived for
redemptions  of Class A, Class B or Class C shares of an  Oppenheimer  fund. The
shares must have been  acquired  by the merger of a Former  Quest for Value Fund
into the fund or by exchange  from an  Oppenheimer  fund that was a Former Quest
for Value Fund or into  which  such fund  merged.  Those  shares  must have been
purchased prior to March 6, 1995 in connection with:
|_|      withdrawals  under an  automatic  withdrawal  plan  holding only either
         Class B or Class C shares if the annual  withdrawal does not exceed 10%
         of the initial value of the account, and
|_|      liquidation of a shareholder's account if the aggregate net asset value
         of shares held in the account is less than the required  minimum  value
         of such accounts.

      |X| Waivers for Redemptions of Shares  Purchased on or After March 6, 1995
but Prior to November 24, 1995. In the following cases, the contingent  deferred
sales  charge  will be waived  for  redemptions  of Class A,  Class B or Class C
shares of an Oppenheimer  fund. The shares must have been acquired by the merger
of a  Former  Quest  for  Value  Fund  into  the  fund  or by  exchange  from an
Oppenheimer  fund  that was a Former  Quest For Value  Fund or into  which  such
Former Quest for Value Fund merged.  Those shares must have been purchased on or
after March 6, 1995, but prior to November 24, 1995:
|_|   redemptions following the death or disability of the shareholder(s) (as
         evidenced by a determination of total disability by the U.S. Social
         Security Administration);
|_|      withdrawals under an automatic withdrawal plan (but only for Class B or
         Class C shares) where the annual  withdrawals  do not exceed 10% of the
         initial value of the account; and
|_|      liquidation of a shareholder's account if the aggregate net asset value
         of shares held in the account is less than the required minimum account
         value.

      A shareholder's account will be credited with the amount of any contingent
deferred  sales charge paid on the redemption of any Class A, Class B or Class C
shares of the  Oppenheimer  fund  described  in this section if the proceeds are
invested  in the same Class of shares in that fund or another  Oppenheimer  fund
within 90 days after redemption.


<PAGE>


    V. Special Sales Charge Arrangements for Shareholders of Certain Oppenheimer
    Funds Who Were Shareholders of Connecticut Mutual Investment Accounts, Inc.

The initial and  contingent  deferred  sale charge rates and waivers for Class A
and Class B shares described in the respective  Prospectus (or this Appendix) of
the  following  Oppenheimer  funds  (each is  referred  to as a  "Fund"  in this
section):
o     Oppenheimer U. S. Government Trust,
o     Oppenheimer Bond Fund,
o     Oppenheimer Disciplined Value Fund and
o     Oppenheimer Disciplined Allocation Fund
are  modified  as  described  below  for  those  Fund   shareholders   who  were
shareholders  of the  following  funds  (referred to as the "Former  Connecticut
Mutual  Funds")  on  March 1,  1996,  when  OppenheimerFunds,  Inc.  became  the
investment adviser to the Former Connecticut Mutual Funds:

  Connecticut Mutual Liquid Account         Connecticut   Mutual  Total  Return
                                            Account
  Connecticut Mutual Government  Securities CMIA LifeSpan Capital  Appreciation
Account                                     Account
  Connecticut Mutual Income Account         CMIA LifeSpan Balanced Account
  Connecticut Mutual Growth Account         CMIA Diversified Income Account

A.  Prior Class A CDSC and Class A Sales Charge Waivers.

      |X| Class A Contingent  Deferred Sales Charge.  Certain  shareholders of a
Fund and the other Former  Connecticut  Mutual Funds are entitled to continue to
make additional purchases of Class A shares at net asset value without a Class A
initial  sales  charge,  but subject to the Class A  contingent  deferred  sales
charge that was in effect  prior to March 18,  1996 (the "prior  Class A CDSC").
Under the prior Class A CDSC,  if any of those  shares are  redeemed  within one
year of purchase, they will be assessed a 1% contingent deferred sales charge on
an amount equal to the current  market value or the original  purchase  price of
the shares  sold,  whichever  is smaller  (in such  redemptions,  any shares not
subject to the prior Class A CDSC will be redeemed first).

      Those  shareholders  who are  eligible for the prior Class A CDSC are: (1)
persons whose purchases of Class A shares of a Fund and other Former
         Connecticut  Mutual Funds were  $500,000  prior to March 18, 1996, as a
         result of direct purchases or purchases pursuant to the Fund's policies
         on Combined  Purchases or Rights of Accumulation,  who still hold those
         shares in that Fund or other Former Connecticut Mutual Funds, and
(2)      persons whose intended purchases under a Statement of Intention entered
         into prior to March 18, 1996,  with the former  general  distributor of
         the  Former  Connecticut  Mutual  Funds to  purchase  shares  valued at
         $500,000  or more over a  13-month  period  entitled  those  persons to
         purchase shares at net asset value without being subject to the Class A
         initial sales charge.

    Any of the Class A shares of a Fund and the other Former  Connecticut Mutual
Funds that were  purchased  at net asset value prior to March 18,  1996,  remain
subject to the prior Class A CDSC, or if any additional  shares are purchased by
those  shareholders at net asset value pursuant to this arrangement they will be
subject to the prior Class A CDSC.

      |X| Class A Sales Charge Waivers.  Additional Class A shares of a Fund may
be purchased without a sales charge, by a person who was in one (or more) of the
categories  below and acquired Class A shares prior to March 18, 1996, and still
holds Class A shares:
(1)

<PAGE>


      anypurchaser,  provided the total initial  amount  invested in the Fund or
         any one or more of the Former Connecticut Mutual Funds totaled $500,000
         or more, including investments made pursuant to the Combined Purchases,
         Statement of Intention and Rights of Accumulation features available at
         the time of the initial  purchase and such  investment is still held in
         one or more of the Former Connecticut Mutual Funds or a Fund into which
         such Fund merged;
(2)      any  participant in a qualified  plan,  provided that the total initial
         amount  invested  by the  plan  in the  Fund  or any one or more of the
         Former Connecticut Mutual Funds totaled $500,000 or more;
(3)   Directors of the Fund or any one or more of the Former Connecticut Mutual
         Funds and members of their immediate families;
(4)   employee benefit plans sponsored by Connecticut Mutual Financial Services,
         L.L.C. ("CMFS"), the prior distributor of the Former Connecticut Mutual
         Funds, and its affiliated companies;
(5)      one or more  members of a group of at least 1,000  persons (and persons
         who are  retirees  from  such  group)  engaged  in a  common  business,
         profession,  civic or charitable  endeavor or other  activity,  and the
         spouses and minor  dependent  children of such  persons,  pursuant to a
         marketing program between CMFS and such group; and
(6)      an  institution  acting as a fiduciary  on behalf of an  individual  or
         individuals,  if  such  institution  was  directly  compensated  by the
         individual(s)  for  recommending the purchase of the shares of the Fund
         or any one or more of the Former Connecticut Mutual Funds, provided the
         institution had an agreement with CMFS.

      Purchases  of Class A shares  made  pursuant  to (1) and (2)  above may be
subject to the Class A CDSC of the Former  Connecticut  Mutual  Funds  described
above.

      Additionally,  Class A shares of a Fund may be  purchased  without a sales
charge by any holder of a variable  annuity contract issued in New York State by
Connecticut  Mutual Life Insurance Company through the Panorama Separate Account
which is beyond the  applicable  surrender  charge  period and which was used to
fund a qualified plan, if that holder  exchanges the variable  annuity  contract
proceeds to buy Class A shares of the Fund.

B.  Class A and Class B Contingent Deferred Sales Charge Waivers.

In addition to the waivers  set forth in the  Prospectus  and in this  Appendix,
above,  the contingent  deferred sales charge will be waived for  redemptions of
Class A and Class B shares of a Fund and  exchanges of Class A or Class B shares
of a Fund into  Class A or Class B shares of a Former  Connecticut  Mutual  Fund
provided  that  the  Class A or Class B shares  of the  Fund to be  redeemed  or
exchanged  were (i)  acquired  prior to March 18, 1996 or (ii) were  acquired by
exchange from an  Oppenheimer  fund that was a Former  Connecticut  Mutual Fund.
Additionally,  the shares of such Former  Connecticut Mutual Fund must have been
purchased prior to March 18, 1996: (1) by the estate of a deceased  shareholder;
(2) upon the disability of a shareholder, as defined in Section 72(m)(7) of the
         Internal Revenue Code;
(3)      for   retirement   distributions   (or   loans)  to   participants   or
         beneficiaries  from retirement plans qualified under Sections 401(a) or
         403(b)(7)of the Code, or from IRAs, deferred compensation plans created
         under Section 457 of the Code, or other employee benefit plans;
(4)   as tax-free returns of excess contributions to such retirement or employee
         benefit plans;
(5)      in whole or in part,  in  connection  with  shares  sold to any  state,
         county,  or city, or any  instrumentality,  department,  authority,  or
         agency thereof,  that is prohibited by applicable  investment laws from
         paying a sales charge or commission in connection  with the purchase of
         shares of any registered investment management company;
(6)      in  connection  with  the  redemption  of  shares  of the Fund due to a
         combination  with  another  investment  company  by virtue of a merger,
         acquisition or similar reorganization transaction;
(7) in connection with the Fund's right to involuntarily redeem or liquidate the
         Fund;
(8)      in connection with automatic  redemptions of Class A shares and Class B
         shares in certain  retirement  plan  accounts  pursuant to an Automatic
         Withdrawal  Plan but limited to no more than 12% of the original  value
         annually; or
(9)      as  involuntary  redemptions  of shares by  operation  of law, or under
         procedures  set forth in the Fund's  Articles of  Incorporation,  or as
         adopted by the Board of Directors of the Fund.


               VI. Special Reduced Sales Charge for Former Shareholders of
                           Advance America Funds, Inc.

    Shareholders of Oppenheimer Municipal Bond Fund, Oppenheimer U.S. Government
Trust,  Oppenheimer Strategic Income Fund and Oppenheimer Equity Income Fund who
acquired   (and  still  hold)   shares  of  those  funds  as  a  result  of  the
reorganization  of series of Advance America Funds,  Inc. into those Oppenheimer
funds on October 18, 1991, and who held shares of Advance America Funds, Inc. on
March 30, 1990, may purchase Class A shares of those four Oppenheimer funds at a
maximum sales charge rate of 4.50%.


            VII. Sales Charge Waivers on Purchases of Class M Shares of
                     Oppenheimer Convertible Securities Fund

Oppenheimer  Convertible  Securities  Fund  (referred  to as the  "Fund" in this
section)  may sell Class M shares at net asset value  without any initial  sales
charge to the classes of investors  listed  below who,  prior to March 11, 1996,
owned shares of the Fund's  then-existing Class A and were permitted to purchase
those shares at net asset value without sales charge:
|_|   the Manager and its affiliates,
|_|      present or former  officers,  directors,  trustees and  employees  (and
         their  "immediate  families"  as  defined in the  Fund's  Statement  of
         Additional  Information)  of the Fund, the Manager and its  affiliates,
         and  retirement  plans  established  by  them or the  prior  investment
         advisor of the Fund for their employees,
|_|      registered  management  investment  companies  or separate  accounts of
         insurance  companies  that  had an  agreement  with  the  Fund's  prior
         investment advisor or distributor for that purpose,
|_|      dealers or brokers that have a sales agreement with the Distributor, if
         they purchase shares for their own accounts or for retirement plans for
         their employees,
|_|      employees and registered representatives (and their spouses) of dealers
         or brokers described in the preceding section or financial institutions
         that have entered into sales arrangements with those dealers or brokers
         (and  whose  identity  is made  known to the  Distributor)  or with the
         Distributor,  but only if the purchaser certifies to the Distributor at
         the time of purchase that the purchaser meets these qualifications,
|_|      dealers,  brokers,  or registered  investment advisors that had entered
         into an agreement with the Distributor or the prior  distributor of the
         Fund  specifically  providing for the use of Class M shares of the Fund
         in specific investment products made available to their clients, and
dealers,  brokers or  registered  investment  advisors  that had entered into an
agreement with the Distributor or prior distributor of the Fund's shares to sell
shares to defined  contribution  employee retirement plans for which the dealer,
broker, or investment advisor provides administrative services.


<PAGE>



--------------------------------------------------------------------------------
                            Oppenheimer California Municipal Fund
--------------------------------------------------------------------------------

Internet Web Site:
         www.oppenheimerfunds.com

Investment Adviser
     OppenheimerFunds, Inc.
     Two World Trade Center
     New York, New York 10048-0203

Distributor
     OppenheimerFunds Distributor, Inc.
     Two World Trade Center
     New York, New York 10048-0203

Transfer Agent
     OppenheimerFunds Services
     P.O. Box 5270
     Denver, Colorado 80217
     1-800-525-7048

Custodian Bank
     Citibank, N.A.
     399 Park Avenue
     New York, New York 10043

Independent Auditors
     KPMG LLP
     707 Seventeenth Street
     Denver, Colorado 80202

Legal Counsel
     Mayer, Brown & Platt
     1675 Broadway
     New York, New York 10019




     PX790.1199



<PAGE>


Oppenheimer
Main Street California Municipal Fund(R)
--------------------------------------------------------------------------------


Prospectus dated December 22, 1999


                                         Oppenheimer   Main  Street   California
                                         Municipal  Fund is a  mutual  fund.  It
                                         seeks   current   income   exempt  from
                                         federal and California  personal income
                                         taxes   by   investing   in   municipal
                                         securities,    while    attempting   to
                                         preserve capital.

                                               This     Prospectus      contains
                                         important  information about the Fund's
                                         objective,   its  investment  policies,
                                         strategies and risks.  It also contains
                                         important information about how to buy
As with all mutual funds,  the and sell shares of the Fund and other  Securities
and Exchange  Commission has account features.  Please read this not approved or
disapproved the Fund's Prospectus carefully before you invest securities nor has
it determined  that and keep it for future  reference  about this  Prospectus is
accurate  or your  account.  complete.  It is a criminal  offense  to  represent
otherwise.
--------------------------------------------------------------------------------
                             (logo) OppenheimerFunds
                             The Right Way to Invest



<PAGE>



27



                            CONTENTS

                  A B O U T  T H E  F U N D

                  The Fund's Investment Objective and Strategies

                  Main Risks of Investing in the Fund

                  The Fund's Past Performance

                  Fees and Expenses of the Fund

                  About the Fund's Investments

                  How the Fund is Managed

                  A B O U T  Y O U R  A C C O U N T

                  How to Buy Shares
                  Class A Shares
                  Class B Shares

                  Special Investor Services
                  AccountLink
                  PhoneLink
                  OppenheimerFunds Internet Web Site

                  How to Sell Shares
                  By Mail
                  By Telephone
                  By Wire
                  By Checkwriting

                  How to Exchange Shares

                  Shareholder Account Rules and Policies

                  Dividends and Tax Information

                  Financial Highlights


<PAGE>


                                                A B O U T  T H E  F U N D

The Fund's Investment Objective and Strategies

WHAT IS THE  FUND'S  INVESTMENT  OBJECTIVE?  The  Fund  seeks as high a level of
current  income exempt from federal and California  personal  income taxes as is
available from investing in municipal  securities  while  attempting to preserve
capital.

WHAT DOES THE FUND INVEST IN? The Fund invests  mainly in  California  municipal
securities that pay interest exempt from federal and California  personal income
taxes.  As a  fundamental  policy,  the Fund  invests  at least 80% of its total
assets in California Municipal Securities under normal market conditions.  These
primarily include municipal bonds (which are long-term  obligations),  municipal
notes (short-term  obligations),  and interests in municipal leases. Most of the
securities  the Fund buys must be  "investment-grade"  (the four highest  rating
categories of national rating organizations, such as Moody's Investors Services,
Inc.).

HOW DOES  THE  PORTFOLIO  MANAGER  DECIDE  WHAT  SECURITIES  TO BUY OR SELL?  In
selecting  securities  for the  Fund,  the  portfolio  manager  looks  primarily
throughout California for municipal securities,  using a variety of factors that
may change over time and may vary in  particular  cases.  Some of these  factors
are:
   o  Securities that provide high current income
   o  A wide  range  of  securities  of  different  issuers  within  the  state,
      including different agencies and municipalities, to spread risk
   o Securities  having favorable credit  characteristics  o Special  situations
   that provide opportunities for value

WHO IS THE FUND DESIGNED FOR? The Fund is designed for individual  investors who
are seeking income exempt from federal and California personal income taxes. The
Fund does not seek  capital  gains or growth.  Because it invests in  tax-exempt
securities,  the Fund is not  appropriate  for  retirement  plan accounts or for
investors seeking capital growth. The Fund is not a complete investment program.

Main Risks of Investing in the Fund

All investments have risks to some degree. The Fund's investments are subject to
changes in their value from a number of factors  described below.  There is also
the  risk  that  poor  security  selection  by the  Fund's  investment  Manager,
OppenheimerFunds,  Inc., will cause the Fund to under perform other funds having
a similar objective.

      These risks collectively form the risk profile of the Fund, and can affect
the value of the Fund's investments,  its investment  performance and its prices
per share.  These risks mean that you can lose money by  investing  in the Fund.
When you redeem your  shares,  they may be worth more or less than what you paid
for them.  There is no  assurance  that the Fund  will  achieve  its  investment
objective.

CREDIT RISK. Municipal securities are subject to credit risk. Credit risk is the
risk that the  issuer  of a  municipal  security  might  not make  interest  and
principal  payments on the  security as they become due. If the issuer  fails to
pay interest, the Fund's income may be reduced, and if the issuer fails to repay
principal,  the value of that  security and of the Fund's shares may be reduced.
Because  the Fund can  invest  as much as 25% of its total  assets in  municipal
securities below investment-grade to seek higher income, the Fund's credit risks
are  greater  than  those of  funds  that buy  only  investment-grade  bonds.  A
downgrade in an issuer's credit rating or other adverse news about an issuer can
reduce the market value of that issuer's securities.

INTEREST RATE RISKS.  Municipal  securities are subject to changes in value when
prevailing  interest  rates  change.  When  interest  rates fall,  the values of
already-issued  municipal  securities  generally rise. When interest rates rise,
the values of already-issued  municipal  securities  generally decline,  and the
bonds may sell at a discount  from their face  amount.  The  magnitude  of these
price changes is generally  greater for bonds with longer  maturities.  The Fund
currently  focuses on longer term  securities to seek higher income.  Therefore,
its share prices may fluctuate more when interest rates change.

RISKS OF  NON-DIVERSIFICATION.  The Fund is  "non-diversified."  That means that
compared to funds that are  diversified,  it can invest a greater portion of its
assets in the  securities  of one issuer,  such as bonds  issued by the State of
California.  Having a higher percentage of its assets invested in the securities
of fewer issuers,  particularly  obligations of government issuers of one state,
could result in greater fluctuations of the Fund's share prices due to economic,
regulatory or political problems in California.

HOW RISKY IS THE FUND OVERALL?  The value of the Fund's  investments will change
over time due to a number of  factors.  They  include  changes in  general  bond
market  movements,  the change in value of particular  bonds because of an event
affecting the issuer,  or changes in interest  rates that can affect bond prices
overall. The Fund focuses its investments in California municipal securities and
is  non-diversified.  It will therefore be vulnerable to the effects of economic
changes that affect California  governmental  issuers.  These changes can affect
the  value  of  the  Fund's  investments  and  its  prices  per  share.  In  the
OppenheimerFunds  spectrum,  the Fund is more  conservative  than some  types of
taxable bond funds,  such as high yield bond funds,  but has greater  risks than
money market funds.

--------------------------------------------------------------------------------
An  investment  in the Fund is not a deposit of any bank,  and is not insured or
guaranteed by the Federal Deposit Insurance  Corporation or any other government
agency.
--------------------------------------------------------------------------------

The Fund's Past Performance

The bar chart and table below show one measure of the risks of  investing in the
Fund, by showing changes in the Fund's performance (for its Class A shares) from
year to year for the full  calendar  years  since the  Fund's  inception  and by
showing how the average  annual total  returns of the Fund's  shares  compare to
those of a broad-based  market index. The Fund's past investment  performance is
not necessarily an indication of how the Fund will perform in the future.

Annual Total Returns (Class A) (as of 12/31 each year)

[See appendix to prospectus for data in bar chart showing annual total returns]


For  the  period  from  1/1/99  through  9/30/99,  the  cumulative  return  (not
annualized) for Class A shares was -3.53%. Sales charges are not included in the
calculations  of return in this bar chart,  and if those charges were  included,
the returns would be less than those shown.
During the period shown in the bar chart,  the highest  return (not  annualized)
for a  calendar  quarter  was  8.78%  (1st Q `95)  and the  lowest  return  (net
annualized) for a calendar quarter was -5.56% (1st Q `94).


Average Annual Total Returns                                       Life of
for the periods ending December       1 Year       5 Years         Class)
31, 1998
-------------------------------------------------------------------------------
Class A Shares (inception 5/18/90)     1.27%        5.41%           7.59%
-------------------------------------------------------------------------------
Lehman Brothers Municipal Bond         6.48%        6.22%           8.09%
Index
(from 5/31/90)
-------------------------------------------------------------------------------
Class B Shares (inception 10/29/93)    0.27%        5.01%           5.12%
-------------------------------------------------------------------------------
The Fund's  average annual total returns  include the applicable  sales charges:
for Class A, the current maximum initial sales charge of 4.75%; for Class B, the
applicable  contingent deferred sales charges of 5% (1-year), 2% (5-year) and 1%
(life of class).

The returns  measure the  performance of a hypothetical  account and assume that
all dividends and capital gains distributions have been reinvested in additional
shares. The Fund's performance is compared to the Lehman Brothers Municipal Bond
Index, an unmanaged index of a broad range of investment-grade  municipal bonds.
The index includes municipal  securities from many states while the Fund focuses
on California municipal securities,  and the index performance does not consider
the effects of capital gains or transaction costs.

Fees and Expenses of the Fund

The Fund pays a variety of  expenses  directly  for  management  of its  assets,
administration,  distribution of its shares and other  services.  Those expenses
are  subtracted  from the Fund's assets to calculate the Fund's net asset values
per  share.   All   shareholders   therefore  pay  those  expenses   indirectly.
Shareholders  pay other  expenses  directly,  such as sales  charges and account
transaction  charges.  The following tables are meant to help you understand the
fees  and  expenses  you may pay if you buy and hold  shares  of the  Fund.  The
numbers  below are based on the Fund's  expenses  during  its fiscal  year ended
August 31, 1999.

Shareholder Fees (charges paid directly from your investment):

                                 Class A Shares              Class B Shares
--------------------------------------------------------------------------------
Maximum Sales Charge (Load) on
purchases (as % of offering               4.75%                   None
price)
--------------------------------------------------------------------------------
Maximum Deferred Sales Charge
(Load) (as % of the lower of
the original offering price or            None1                   5%2
redemption proceeds)
--------------------------------------------------------------------------------
1.   A 1%  contingent  deferred  sales  charge  may apply to  redemptions  of
     investments  of $1  million  or more of  Class A  shares.  See  "How to Buy
     Shares" for details.

4. Applies to redemptions in first year after purchase.  The contingent deferred
   sales charge declines to 1% in the sixth year and is eliminated after that.

Annual Fund Operating Expenses (deducted from Fund assets):
(% of average daily net assets)

                                     Class A Shares          Class B Shares
--------------------------------------------------------------------------------
Management Fees                           0.55%                  0.55%
---------------------------------
--------------------------------------------------------------------------------
Distribution and/or Service               None                   1.00%
(12b-1) Fees
--------------------------------------------------------------------------------
Other Expenses                            0.12%                  0.12%
--------------------------------------------------------------------------------
Total Annual Operating Expenses           0.67%                  1.67%
--------------------------------------------------------------------------------

Expenses may vary in future years. "Other expenses" include transfer agent fees,
custodial  fees, and accounting and legal expenses the Fund pays. The Management
Fees shown above the maximum rate under the investment advisory agreement and do
not reflect a voluntary  undertaking by the Manager to limit its management fees
to a maximum  annual  rate of 0.40% if the net  assets of the Fund  exceed  $100
million.  As a result of that waiver,  the actual  management  fee rate for both
classes  during the fiscal year was 0.40% and actual  total  operating  expenses
were 0.51% of  average  annual net assets for Class A and 1.52% for Class B. The
Manager can amend or withdraw that waiver at any time.

EXAMPLES.  The  following  examples are intended to help you compare the cost of
investing  in the Fund with the cost of investing  in other  mutual  funds.  The
examples assume that you invest $10,000 in a class of shares of the Fund for the
time periods indicated, and reinvest your dividends and distributions.

      The first example assumes that you redeem all of your shares at the end of
those periods.  The second example  assumes you keep your shares.  Both examples
also assume that your  investment has a 5% return each year and that the class's
operating  expenses  remain the same.  Your actual  costs may be higher or lower
because expenses will vary over time.  Based on these  assumptions your expenses
would be as follows:

If shares are redeemed:    1 Year         3 Years       5 Years      10 Years1
--------------------------------------------------------------------------------
Class A Shares             $540           $679          $830         $1,270
--------------------------------------------------------------------------------
Class B Shares             $670           $826          $1,107       $1,463
--------------------------------------------------------------------------------

If shares are not
redeemed:                  1 Year         3 Years       5 Years      10 Years1
--------------------------------------------------------------------------------
Class A Shares             $540           $679          $830         $1,270
--------------------------------------------------------------------------------
Class B Shares             $170           $526          $907         $1,463
--------------------------------------------------------------------------------
In the first example,  expenses include the initial sales charge for Class A and
the applicable Class B contingent deferred sales charges. In the second example,
the Class A expenses  include  the sales  charge,  but Class B  expenses  do not
include contingent deferred sales charges.
1. Class B expense for years 7 through 10 are based on Class A  expenses,  since
Class B shares automatically convert to Class A after 6 years.

About the Fund's Investments

THE FUND'S PRINCIPAL INVESTMENT POLICIES. The allocation of the Fund's portfolio
among  different  investments  will  vary  over  time  based  on  the  Manager's
evaluation of issuer, economic and market trends. The Fund's portfolio might not
always include all of the different types of investments  described  below.  The
Statement of Additional Information contains more detailed information about the
Fund's investment policies and risks.

      The Manager tries to reduce risks by selecting a wide variety of municipal
investments and by carefully  researching  securities before they are purchased.
However,  changes in the overall  market prices of municipal  securities and the
income  they pay can occur at any time.  The share  prices and yield of the Fund
will change daily based on changes in interest  rates and market  conditions and
in response to other economic events.

Municipal Securities.  The Fund buys municipal bonds and notes, certificates of
      participation in municipal leases and other debt obligations.

      The Fund invests  mainly in  California  municipal  securities,  which are
      municipal  securities that are not subject (in the opinion of bond counsel
      to the issuer at the time they are issued) to California  personal  income
      tax. The debt  obligations  are issued by the State of California  and its
      political  subdivisions  (such as cities,  towns  counties,  agencies  and
      authorities).  The term "California municipal securities" may also include
      debt securities of the governments of certain possessions, territories and
      commonwealths  of the  United  States if the  interest  is not  subject to
      California personal income tax.

      The  Fund  can  also  buy  other  municipal  securities,   issued  by  the
      governments  of the  District of Columbia  and of other  states as well as
      their political  subdivisions,  authorities  and agencies,  and securities
      issued by any  commonwealths,  territories  or  possessions  of the United
      States, or their respective agencies, instrumentalities or authorities, if
      the  interest  paid on the  security  is not  subject to federal  personal
      income tax (in the  opinion of bond  counsel to the issuer at the time the
      security is issued).

      Municipal  securities are issued to raise money for a variety of public or
      private  purposes,   including   financing  state  or  local  governments,
      financing  specific projects or public  facilities.  The Fund can buy both
      long-term and short-term municipal securities. Long-term securities have a
      maturity of more than one year when issued.  The Fund generally focuses on
      longer-term securities, to seek higher income.

      The Fund can buy in municipal  securities that are "general  obligations,"
      secured by the issuer's pledge of its full faith,  credit and taxing power
      for the payment of principal and interest.  The Fund can also buy "revenue
      obligations,"  payable  only from the  revenues  derived from a particular
      facility or class of facilities, or a specific excise tax or other revenue
      source.  Some  revenue  obligations  are private  activity  bonds that pay
      interest  that may be a tax  preference  item  for  investors  subject  to
      alternative minimum tax.

o    Municipal Lease Obligations. Municipal leases are used by state and local
     governments to obtain funds to acquire land,  equipment or facilities.  The
     Fund  can  invest  in  certificates  of  participation   that  represent  a
     proportionate  interest in payments made under municipal lease obligations.
     Most  municipal  leases,  while  secured  by the leased  property,  are not
     general  obligations  of  the  issuing  municipality.  They  often  contain
     "non-appropriation"  clauses  under which the municipal  government  has no
     obligation  to make lease or  installment  payments in future  years unless
     money is  appropriated  on a yearly basis.  If the government  stops making
     payments or transfers  its payment  obligations  to a private  entity,  the
     obligation could lose value or become taxable.

Ratings of Municipal  Securities the Fund Buys. Most of the municipal securities
      the Fund buys are  "investment-grade"  at the time of  purchase.  The Fund
      does not invest more than 25% of its total assets in municipal  securities
      that at the time of purchase are not investment-grade.  "Investment-grade"
      securities  are those rated within the four highest  rating  categories of
      Moody's,  Standard  & Poor's,  Fitch or Duff & Phelps or other  nationally
      recognized rating organizations,  or (if unrated) judged by the Manager to
      be comparable to rated investment-grade securities. Rating definitions are
      in Appendix A to the Statement of Additional Information.

      If the  securities  are not rated,  the Manager  will use its  judgment to
      assign a rating to a security  comparable to that of a rating agency.  The
      Fund limits its investments in unrated  securities to not more than 20% of
      its total  assets.  If the rating of a security is reduced  after the Fund
      buys  it,  the  Fund is not  required  automatically  to  dispose  of that
      security. However, the Manager will evaluate those securities to determine
      whether to keep them in the Fund's portfolio.

      The   Manager   may   rely  to  some   extent   on   credit   ratings   by
      nationally-recognized  rating  organizations in evaluating the credit risk
      of  securities  selected  for the Fund's  portfolio.  It also uses its own
      research and  analysis.  Many factors  affect an issuer's  ability to make
      timely payments,  and the credit risks of a particular security may change
      over time.

   o  Special Risks of Lower-Grade  Securities.  Municipal  securities  that are
      below  investment-grade  (these are sometimes  called "junk bonds") may be
      subject to greater  fluctuations and risks of loss of income and principal
      than investment-grade  municipal securities.  Securities that are (or that
      have  fallen)  below  investment-grade  have greater risk that the issuers
      might not meet their debt obligations.

CAN THE FUND'S  INVESTMENT  OBJECTIVE AND POLICIES  CHANGE?  The Fund's Board of
Directors can change  non-fundamental  policies  without  shareholder  approval,
although significant changes will be described in amendments to this Prospectus.
Fundamental  policies are those that cannot be changed without the approval of a
majority  of  the  Fund's  outstanding  voting  shares.  The  Fund's  investment
objective  is a  fundamental  policy.  Other  investment  restrictions  that are
fundamental policies are listed in the Statement of Additional  Information.  An
investment policy is not fundamental  unless this Prospectus or the Statement of
Additional Information says that it is.

OTHER INVESTMENT  STRATEGIES.  To seek its objective,  the Fund can also use the
investment  techniques and strategies described below. The Fund might not always
use all of them.  These techniques have certain risks although some are designed
to help reduce overall investment or market risks.

Floating Rate/Variable Rate Obligations. Some municipal securities have variable
      or  floating  interest  rates.  Variable  rates are  adjustable  at stated
      periodic intervals. Floating rates are automatically adjusted according to
      a specified market rate, such as a percentage of the prime rate of a bank,
      or the 91-day U.S. Treasury Bill rate.

      Variable rate bonds known as "inverse floaters" pay interest at rates that
      move in the opposite  direction of yields on short-term  bonds in response
      to market changes.  As interest rates rise,  inverse floaters produce less
      current income, and their market value can become volatile.

      Inverse  floaters are a type of "derivative  security." Some have a "cap,"
      so that if  interest  rates  rise  above  the  "cap,"  the  security  pays
      additional interest income. If rates do not rise above the "cap," the Fund
      will have paid an additional  amount for a feature that proves  worthless.
      The Fund will  invest  not more than 20% of its  total  assets in  inverse
      floaters.

Other Derivatives. The Fund can also invest in other derivative investments that
      pay interest that depends on the change in value of an  underlying  asset,
      interest rate or index.  Examples are hedging  instruments,  interest rate
      swaps, municipal bond indices or swap indices.

      Derivatives  have risks.  If the issuer of the derivative  investment does
      not pay the amount  due,  the Fund can lose money on the  investment.  The
      underlying  security or investment on which a derivative is based, and the
      derivative  itself, may not perform the way the Manager expected it to. As
      a result of these risks the Fund could  realize  less  principal or income
      from the investment than expected or its hedge might be unsuccessful. As a
      result, the Fund's share prices could fall. Certain derivative investments
      held by the Fund might be illiquid.

   o  Hedging.  The  Fund  can buy and  sell  futures  contracts,  put and  call
      options,  and enter  into  interest  rate swap  agreements.  These are all
      referred  to as "hedging  instruments."  The Fund does not  currently  use
      hedging extensively nor for speculative purposes. It has limits on its use
      of hedging  instruments  and is not  required  to use them in seeking  its
      objective.

      Some of these strategies  would hedge the Fund's  portfolio  against price
      fluctuations.  Other hedging  strategies,  such as buying futures and call
      options,  would tend to increase  the Fund's  exposure  to the  securities
      market.

      There are also special risks in  particular  hedging  strategies.  Options
      trading  involves  the  payment of  premiums  and can  increase  portfolio
      turnover.  If the Manager used a hedging  instrument  at the wrong time or
      judged market conditions incorrectly, the strategy could reduce the Fund's
      return.  Interest  rate swaps are  subject  to credit  risks (if the other
      party fails to meet its  obligations) and also to interest rate risks. The
      Fund  could be  obligated  to pay more under its swap  agreements  than it
      receives  under them, as a result of interest  rate changes.  The Fund may
      not enter into swaps with respect to more than 25% of its total assets.

"When-Issued"  and  "Delayed-Delivery"   Transactions.  The  Fund  can  purchase
      municipal  securities  on a  "when-issued"  basis and may purchase or sell
      such  securities  on a  "delayed-delivery"  basis.  These  terms  refer to
      securities that have been created and for which a market exists, but which
      are not available for immediate  delivery.  During the period  between the
      purchase  and  settlement,  no  payment  is made for the  security  and no
      interest accrues to the buyer from the investment until the buyer receives
      the security or  settlement  of the trade.  There is a risk of loss to the
      Fund if the value of the security declines prior to the settlement date.

Puts  and Stand-By Commitments.  The Fund can acquire "stand-by  commitments" or
      "puts" with respect to municipal securities. The Fund obtains the right to
      sell  specified  securities  at a set  price  on  demand  to  the  issuing
      broker-dealer  or  bank.  However,  this  feature  may  result  in a lower
      interest rate on the security.  The Fund will acquire stand-by commitments
      or puts solely to enhance portfolio liquidity.

Illiquid and Restricted Securities.  Investments may be illiquid because they do
      not have an active  trading  market,  making it difficult to value them or
      dispose of them promptly at an acceptable price. A restricted  security is
      one that has a  contractual  restriction  on its resale or which cannot be
      sold publicly until it is registered under the Securities Act of 1933. The
      Fund  will  not  invest  more  than  15% of its  net  assets  in  illiquid
      securities.  Certain restricted securities that are eligible for resale to
      qualified  institutional  buyers  may not be subject  to that  limit.  The
      Manager  monitors  holdings of illiquid  securities on an ongoing basis to
      determine whether to sell any holdings to maintain adequate liquidity.

Temporary  Defensive  Investments.  The Fund can  invest up to 100% of its total
      assets in temporary  defensive  investments  during  periods of unusual or
      adverse market conditions.  Generally,  they would be short-term municipal
      securities  but  could  be  U.S.  government  securities  or  highly-rated
      corporate  debt  securities.  The  income  from some  temporary  defensive
      investments  might not be  tax-exempt,  and  therefore  when making  those
      investments the Fund might not achieve its investment objective.  The Fund
      can also hold cash and cash equivalents pending the investment of proceeds
      from  the  sale  of  Fund  shares  or  portfolio  securities  or  to  meet
      anticipated redemptions of Fund shares.

How the Fund is Managed

THE  MANAGER.  The  Manager  chooses  the Fund's  investments  and  handles  its
day-to-day business. The Manager carries out its duties, subject to the policies
established  by the Fund's  Board of  Directors,  under an  investment  advisory
agreement  that states the Manager's  responsibilities.  The agreement  sets the
fees the Fund pays to the Manager and  describes  the expenses  that the Fund is
responsible to pay to conduct its business.

      The Manager has operated as an investment  adviser since January 1960. The
Manager (including  subsidiaries) managed assets of more than $110 billion as of
November 30, 1999,  including other  Oppenheimer  funds with more than 5 million
shareholder  accounts.  The Manager is located at Two World Trade  Center,  34th
Floor, New York, New York 10048-0203.

Portfolio Manager.  The Portfolio manager of the Fund is Christian D. Smith, a
     Senior  Vice  President  of  the  Manager.  He is  the  person  principally
     responsible  for the  day-to-day  management of the Fund's  portfolio,  and
     became the Fund's  portfolio  manager on November 1, 1999.  Mr.  Smith also
     serves as an officer and  portfolio  manager for other  Oppenheimer  funds.
     Prior to joining OppenheimerFunds in 1999 he was a Co-Head of the Municipal
     Portfolio Management Team of Prudential Global Asset Management.

Advisory Fees.  Under  the  investment  advisory  agreement,  the Fund  pays the
      Manager an advisory  fee at an annual rate of 0.55% of average  annual net
      assets if the Fund's net assets are $100 million or more (it is reduced if
      assets are less). The Manager has voluntarily undertaken to limit its fees
      to 0.40% of  average  annual  net  assets if the  Fund's  assets  are $100
      million or more.  The Manager can terminate or amend that  undertaking  at
      any time. The Fund's  management fee for its last fiscal year ended August
      31, 1999, was 0.40% of average annual net assets for each class of shares,
      after the limitation.

YEAR 2000 ISSUES.  Because many  computer  software  systems in use today cannot
distinguish  the year 2000 from the year 1900,  the  markets for  securities  in
which the Fund  invests  could be  detrimentally  affected by computer  failures
beginning  January 1, 2000.  Failure of  computer  systems  used for  securities
trading could result in settlement and liquidity problems for the Fund and other
investors.  That  failure  could have a negative  impact on handling  securities
trades,  pricing and accounting  services.  Data processing errors by government
issuers of securities  could result in economic  uncertainties,  and issuers may
incur  substantial  costs in  attempting  to prevent or fix such errors,  all of
which could have a negative effect on the Fund's investments and returns.

      The Manager,  the  Distributor and the Transfer Agent have been working on
necessary  changes  to their  computer  systems  to deal  with the year 2000 and
expect that their systems will be adapted in time for that event, although there
cannot be assurance of success.  Additionally,  the services they provide depend
on the interaction of their computer systems with those of brokers,  information
services, the Fund's custodian bank and other parties. Therefore, any failure of
the computer systems of those parties to deal with the year 2000 may also have a
negative  effect on the services  they  provide to the Fund.  The extent of that
risk cannot be ascertained at this time.

A B O U T  Y O U R  A C C O U N T

How to Buy Shares

HOW DO YOU BUY SHARES?  You can buy shares several ways, as described below. The
Fund's Distributor,  OppenheimerFunds  Distributor,  Inc., may appoint servicing
agents to accept purchase (and redemption) orders. The Distributor,  in its sole
discretion, may reject any purchase order for the Fund's shares.

BuyingShares  Through  Your  Dealer.  You can buy  shares  through  any  dealer,
      broker,  or  financial  institution  that has a sales  agreement  with the
      Distributor.  Your  dealer will place your order with the  Distributor  on
      your behalf.

BuyingShares Through the Distributor.  Complete an OppenheimerFunds  New Account
      Application  and  return  it with a  check  payable  to  "OppenheimerFunds
      Distributor,  Inc." Mail it to P.O. Box 5270,  Denver,  Colorado 80217. If
      you don't list a dealer on the  application,  the Distributor  will act as
      your agent in buying the shares.  However,  we recommend  that you discuss
      your investment with a financial  advisor before you make a purchase to be
      sure that the Fund is appropriate for you.

   o  Paying by Federal Funds Wire. Shares purchased through the Distributor may
      be paid for by Federal  Funds  wire.  The  minimum  investment  is $2,500.
      Before  sending  a  wire,  call  the  Distributor's   Wire  Department  at
      1.800.525.7048  to notify  the  Distributor  of the wire,  and to  receive
      further instructions.

   o  Buying Shares Through OppenheimerFunds  AccountLink. With AccountLink, you
      pay for  shares by  electronic  funds  transfers  from your bank  account.
      Shares are  purchased  for your  account by a transfer  of money from your
      bank account  through the Automated  Clearing House (ACH) system.  You can
      provide  those  instructions  automatically,  under an Asset Builder Plan,
      described  below,  or by  telephone  instructions  using  OppenheimerFunds
      PhoneLink,  also described below. Please refer to "AccountLink," below for
      more details.

   o  Buying Shares Through Asset Builder Plans.  You may purchase shares of the
      Fund (and up to four other  Oppenheimer  funds)  automatically  each month
      from your account at a bank or other financial  institution under an Asset
      Builder  Plan  with   AccountLink.   Details  are  in  the  Asset  Builder
      Application and the Statement of Additional Information.

HOW MUCH  MUST  YOU  INVEST?  You can buy Fund  shares  with a  minimum  initial
investment of $1,000.  You can make  additional  investments at any time with as
little as $25. There are reduced minimum  investments  under special  investment
plans.

   o  With Asset Builder Plans,  Automatic Exchange Plans and military allotment
      plans,  you can make initial and subsequent  investments  for as little as
      $25.  You can  make  additional  purchases  of at least  $25 by  telephone
      through AccountLink.

   o  The minimum investment requirement does not apply to reinvesting dividends
      from the Fund or other  Oppenheimer  funds (a list of them  appears in the
      Statement of  Additional  Information,  or you can ask your dealer or call
      the Transfer  Agent),  or reinvesting  distributions  from unit investment
      trusts that have made arrangements with the Distributor.

AT WHAT PRICE ARE SHARES SOLD? Shares are sold at their offering price, which is
the net asset value per share plus any initial  sales charge that  applies.  The
offering price that applies to a purchase order is based on the next calculation
of the net asset value per share that is made after the Distributor receives the
purchase order at its offices in Colorado,  or after any agent  appointed by the
Distributor receives the order and sends it to the Distributor.

Net   Asset Value.  The net asset value of each class of shares is determined as
      of the close of The New York Stock  Exchange,  on each day the Exchange is
      open for trading  (referred to in this  Prospectus as a "regular  business
      day").  The Exchange  normally closes at 4:00 P.M., New York time, but may
      close earlier on some days. All references to time in this Prospectus mean
      "New York time".

      The net asset value per share is  determined  by dividing the value of the
      Fund's net assets  attributable to a class by the number of shares of that
      class that are outstanding. To determine net asset value, the Fund's Board
      of Directors has established procedures to value the Fund's securities, in
      general based on market value.  The Board has adopted  special  procedures
      for valuing  illiquid and restricted  securities and obligations for which
      market values cannot be readily obtained.

The   Offering  Price.  To receive the offering  price for a particular  day, in
      most cases the Distributor or its designated agent must receive your order
      by the time of day The New York Stock  Exchange  closes  that day. If your
      order is  received  on a day when the  Exchange  is closed or after it has
      closed,  the order will receive the next offering price that is determined
      after your order is received.

BuyingThrough a Dealer.  If you buy shares  through a dealer,  your  dealer must
      receive the order by the close of The New York Stock Exchange and transmit
      it to the  Distributor  so that it is  received  before the  Distributor's
      close of  business  on a regular  business  day  (normally  5:00  P.M.) to
      receive that day's offering price.  Otherwise,  the order will receive the
      next offering price that is determined.

--------------------------------------------------------------------------------
WHAT  CLASSES OF SHARES  DOES THE FUND  OFFER?  The Fund  offers  investors  two
different  classes  of  shares.   The  different  classes  of  shares  represent
investments in the same portfolio of securities,  but the classes are subject to
different  expenses and will likely have  different  share prices.  When you buy
shares,  be sure to specify  the class of shares.  If you do not choose a class,
your investment will be made in Class A shares.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A Shares.  If you buy Class A shares,  you pay an initial sales charge (on
      investments  up to $1 million).  The amount of that sales charge will vary
      depending  on the amount you invest.  The sales charge rates are listed in
      "How Can You Buy Class A Shares?" below.
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B Shares.  If you buy Class B shares,  you pay no sales charge at the time
      of purchase,  but you will pay an annual  asset-based sales charge. If you
      sell your shares within six years of buying them,  you will normally pay a
      contingent  deferred sales charge.  That contingent  deferred sales charge
      varies depending on how long you own your shares, as described in "How Can
      You Buy Class B Shares?" below.
--------------------------------------------------------------------------------

Which  Class of Shares  Should You  Choose?  Once you decide that the Fund is an
appropriate investment for you, the decision as to which class of shares is best
suited to your needs depends on a number of factors that you should discuss with
your financial advisor. Some factors to consider are how much you plan to invest
and how long you plan to hold your  investment.  If your  goals  and  objectives
change  over  time  and you  plan to  purchase  additional  shares,  you  should
re-evaluate those factors to see if you should consider another class of shares.
The Fund's operating costs that apply to a class of shares and the effect of the
different  types of sales charges on your  investment  will vary your investment
results over time.

      The  discussion  below  is  not  intended  to be  investment  advice  or a
recommendation,  because each investor's financial considerations are different.
You should  review these factors with your  financial  advisor.  The  discussion
below  assumes  that  you will  purchase  only one  class  of  shares  and not a
combination of shares of different classes.

How   Long Do You Expect to Hold Your  Investment?  While future financial needs
      cannot be predicted  with  certainty,  knowing how long you expect to hold
      your  investment  will assist you in selecting  the  appropriate  class of
      shares.  Because of the effect of class-based  expenses,  your choice will
      also depend on how much you plan to invest. For example, the reduced sales
      charges  available for larger  purchases of Class A shares may, over time,
      offset the effect of paying an initial  sales  charge on your  investment,
      compared to the effect over time of higher class-based  expenses on shares
      of Class B.

   o  Investing  for the  Shorter  Term.  While  the  Fund is  intended  to be a
      long-term  investment,  if you  have a  relatively  short-term  investment
      horizon  (that  is,  you plan to hold  your  shares  for not more than six
      years), you should probably consider purchasing Class A shares rather than
      Class B shares.  That is because  of the effect of the Class B  contingent
      deferred  sales  charge if you redeem  within  six  years,  as well as the
      effect of the Class B asset-based  sales charge on the  investment  return
      for that class in the short-term

      And for  investors  who invest  $500,000  or more,  in most cases  Class A
      shares will be the more advantageous choice, no matter how long you intend
      to hold your shares.  For that reason,  the Distributor  normally will not
      accept purchase orders of $500,000 or more of Class B shares from a single
      investor.

   o  Investing for the Longer Term. If you are investing less than $100,000 for
      the  longer-term  and do not expect to need access to your money for seven
      years or more, Class B shares may be appropriate.

      Of course,  these  examples are based on  approximations  of the effect of
      current sales charges and expenses  projected over time, and do not detail
      all of the  considerations  in  selecting  a class of  shares.  You should
      analyze your options  carefully with your financial  advisor before making
      that choice.

Are   There Differences in Account Features That Matter to You? Some account may
      not be  available  to  Class B  shareholders.  Other  features  may not be
      advisable (because of the effect of the contingent  deferred sales charge)
      for Class B shareholders.  Therefore,  you should carefully review how you
      plan to use your investment  account before deciding which class of shares
      to buy.  Additionally,  the dividends payable to Class B shareholders will
      be reduced  by the  additional  expenses  borne by that class that are not
      borne by Class A shares,  such as the  Class B  asset-based  sales  charge
      described  below and in the  Statement of  Additional  Information.  Share
      certificates  are  not  available  for  Class  B  shares,  and if you  are
      considering  using your  shares as  collateral  for a loan,  that may be a
      factor to  consider.  Also,  checkwriting  is not  available  on  accounts
      subject to a contingent deferred sales charge.

How   Does It Affect Payments to My Broker? A salesperson, such as a broker, may
      receive  different  compensation  for selling one class of shares than for
      selling another class. It is important to remember that Class B contingent
      deferred sales charges and asset-based sales charges have the same purpose
      as the  front-end  sales charge on sales of Class A shares:  to compensate
      the  Distributor  for  commissions  and  expenses  it pays to dealers  and
      financial  institutions  for  selling  shares.  The  Distributor  may  pay
      additional  compensation  from its own resources to securities  dealers or
      financial institutions based upon the value of shares of the Fund owned by
      the  dealer  or  financial  institution  for  its own  account  or for its
      customers.

SPECIAL SALES CHARGE  ARRANGEMENTS  AND WAIVERS.  Appendix C to the Statement of
Additional  Information  details the  conditions for the waiver of sales charges
that apply in certain  cases,  and the special  sales charge rates that apply to
purchases of shares of the Fund by certain groups,  or in other special types of
transactions.  To receive a waiver or special sales charge rate, you must advise
the  Distributor  when  purchasing  shares or the Transfer  Agent when redeeming
shares that the special conditions apply.

HOW CAN YOU BUY CLASS A SHARES? Class A shares are sold at their offering price,
which is normally net asset value plus an initial sales charge. However, in some
cases,  described  below,  purchases are not subject to an initial sales charge,
and the  offering  price will be the net asset value.  In other  cases,  reduced
sales  charges may be  available,  as  described  below or in the  Statement  of
Additional Information.  Out of the amount you invest, the Fund receives the net
asset value to invest for your account.

      The sales  charge  varies  depending  on the  amount of your  purchase.  A
portion of the sales charge may be retained by the  Distributor  or allocated to
your dealer as  commission.  The  Distributor  reserves the right to reallow the
entire  commission to dealers.  The current  sales charge rates and  commissions
paid to dealers and brokers are as follows:

                                           Front-End Sales
                           Front-End Sales Charge As a
                          Charge As a      Percentage of     Commission As
                          Percentage of    Net               Percentage of
    Amount of Purchase    Offering Price   Amount Invested   Offering Price
 ------------------------------------------------------------------------------
 Less than $50,000             4.75%             4.98%             4.00%
 ------------------------------------------------------------------------------
 $50,000 or more but           4.50%             4.71%             4.00%
 less than $100,000
 ------------------------------------------------------------------------------
 $100,000 or more but          3.50%             3.63%             3.00%
 less than $250,000
 ------------------------------------------------------------------------------
 $250,000 or more but          2.50%             2.56%             2.25%
 less than $500,000
 ------------------------------------------------------------------------------
 $500,000 or more but          2.00%             2.04%             1.80%
 less than $1 million
 ------------------------------------------------------------------------------

Class A Contingent  Deferred  Sales Charge.  There is no initial sales charge on
      purchases  of Class A shares of any one or more of the  Oppenheimer  funds
      aggregating  $1 million or more.  The  Distributor  pays dealers of record
      commissions  in an amount equal to 1.0% of purchases of $1 million or more
      other than by those retirement accounts. That commission will be paid only
      on purchases that were not previously  subject to a front-end sales charge
      and dealer commission.

      If you  redeem  any of those  shares  within  18  months of the end of the
      calendar  month of their  purchase,  a  contingent  deferred  sales charge
      (called the "Class A contingent  deferred  sales  charge") may be deducted
      from the redemption  proceeds.  That sales charge will be equal to 1.0% of
      the lesser of (1) the aggregate net asset value of the redeemed  shares at
      the time of redemption  (excluding  shares  purchased by  reinvestment  of
      dividends  or capital  gain  distributions)  or (2) the original net asset
      value of the redeemed shares. The Class A contingent deferred sales charge
      will not exceed the aggregate  amount of the  commissions  the Distributor
      paid to your dealer on all purchases of Class A shares of all  Oppenheimer
      funds you made that were subject to the Class A contingent  deferred sales
      charge.

      In determining  whether a contingent deferred sales charge is payable when
      shares  are  redeemed,  the Fund will  first  redeem  shares  that are not
      subject to the sales charge, including shares purchased by reinvestment of
      dividends and capital gains. Then the Fund will redeem other shares in the
      order in which you purchased them.

      The Class A contingent  deferred  sales charge is not charged on exchanges
      of shares under the Fund's exchange privilege (described below).  However,
      if the shares  acquired by exchange are redeemed within 18 calendar months
      of the end of the  calendar  month  in which  the  exchanged  shares  were
      originally purchased, then the sales charge will apply.

Can   You  Reduce  Class A Sales  Charges?  You may be  eligible  to buy Class A
      shares  at  reduced   sales  charge  rates  under  the  Fund's  "Right  of
      Accumulation"  or a Letter of  Intent,  as  described  in  "Reduced  Sales
      Charges" in the Statement of Additional Information:

HOW CAN YOU BUY CLASS B SHARES?  Class B shares are sold at net asset  value per
share without an initial sales charge.  However,  if Class B shares are redeemed
within 6 years of their  purchase,  a contingent  deferred  sales charge will be
deducted from the  redemption  proceeds.  The Class B contingent  deferred sales
charge is paid to  compensate  the  Distributor  for its  expenses of  providing
distribution-related services to the Fund in connection with the sale of Class B
shares.

      The  contingent  deferred  sales charge will be based on the lesser of the
net asset value of the redeemed shares at the time of redemption or the original
net asset value. The contingent deferred sales charge is not imposed on:
   o  the amount of your account value represented by an increase in net asset
      value over the initial purchase price,
   o  shares purchased by the reinvestment of dividends or capital gains
      distributions, or
   o  shares  redeemed in the special  circumstances  described in Appendix C to
      the Statement of Additional Information.

      To determine  whether the  contingent  deferred  sales charge applies to a
redemption, the Fund redeems shares in the following order:

   1.  shares   acquired  by  reinvestment  of  dividends  and  capital  gains
       distributions,
   2. shares held for over 6 years, and
   3. shares held the longest during the 6-year period.

      The amount of the  contingent  deferred  sales  charge  will depend on the
number  of years  since you  invested  and the  dollar  amount  being  redeemed,
according to the following schedule:

 Years Since Beginning of Month in      Contingent Deferred Sales Charge on
 Which                                  Redemptions in That Year
 Purchase Order was Accepted            (As % of Amount Subject to Charge)
 ------------------------------------------------------------------------------
 0 - 1                                  5.0%
 ------------------------------------------------------------------------------
 1 - 2                                  4.0%
 ------------------------------------------------------------------------------
 2 - 3                                  3.0%
 ------------------------------------------------------------------------------
 3 - 4                                  3.0%
 ------------------------------------------------------------------------------
 4 - 5                                  2.0%
 ------------------------------------------------------------------------------
 5 - 6                                  1.0%
 ------------------------------------------------------------------------------
 6 and following                        None
 ------------------------------------------------------------------------------
In the table, a "year" is a 12-month period. In applying the contingent deferred
sales  charge,  all  purchases  are  considered  to have  been made on the first
regular business day of the month in which the purchase was made.

Automatic Conversion of Class B Shares. Class B shares automatically  convert to
      Class A shares 72 months after you purchase them. This conversion  feature
      relieves Class B shareholders of the asset-based sales charge that applies
      to Class B  shares  under  the  Class B  Distribution  and  Service  Plan,
      described  below.  The conversion is based on the relative net asset value
      of the two classes, and no sales load or other charge is imposed. When any
      Class B shares  you hold  convert,  any  other  Class B shares  that  were
      acquired  by  the  reinvesting  of  dividends  and  distributions  on  the
      converted  shares  will also  convert  to Class A shares.  The  conversion
      feature is subject to the continued availability of a tax ruling described
      in the Statement of Additional Information.

DISTRIBUTION AND SERVICE (12B-1) PLAN FOR CLASS B SHARES. The Fund has adopted a
Distribution  and Service Plan for Class B shares to pay the Distributor for its
services and costs in distributing Class B shares and servicing accounts.  Under
the plan, the Fund pays the Distributor an annual  "asset-based sales charge" of
0.75% per year on Class B shares. The Distributor also receives a service fee of
0.25% per year under the plan.

      The asset-based sales charge and service fees increase Class B expenses by
1.00% of the net assets per year.  Because these fees are paid out of the Fund's
assets on an on-going basis, over time these fees will increase the cost of your
investment and may cost you more than other types of sales charges.

      The Distributor uses the service fees to compensate  dealers for providing
personal  services for accounts that hold Class B shares.  The Distributor  pays
the 0.25% service fees to dealers in advance for the first year after the shares
are sold by the  dealer.  After  the  shares  have  been  held  for a year,  the
Distributor pays the service fees to dealers on a quarterly basis.

      The Distributor currently pays a sales commission of 3.75% of the purchase
price of Class B shares to dealers  from its own  resources at the time of sale.
Including  the  advance  of the  service  fee,  the  total  amount  paid  by the
Distributor  to the  dealer at the time of sales of Class B shares is  therefore
4.00% of the purchase  price.  The  Distributor  retains the Class B asset-based
sales charge.

Special Investor Services

ACCOUNTLINK.  You can use our AccountLink feature to link your Fund account with
an  account  at a U.S.  bank  or  other  financial  institution.  It  must be an
Automated Clearing House (ACH) member. AccountLink lets you:
   o  transmit funds  electronically to purchase shares by telephone  (through a
      service  representative  or by  PhoneLink)  or  automatically  under Asset
      Builder Plans, or
   o  have the Transfer Agent send redemption proceeds or transmit dividends and
      distributions  directly to your bank  account.  Please  call the  Transfer
      Agent for more information.

      You may  purchase  shares by  telephone  only after your  account has been
established.  To purchase  shares in amounts up to $250,000  through a telephone
representative,  call the Distributor at  1.800.852.8457.  The purchase  payment
will be debited from your bank account.

      AccountLink  privileges  should be requested on your  application  or your
dealer's settlement  instructions if you buy your shares through a dealer. After
your account is established,  you can request AccountLink  privileges by sending
signature-guaranteed  instructions to the Transfer Agent. AccountLink privileges
will apply to each  shareholder  listed in the  registration  on your account as
well as to your dealer  representative  of record  unless and until the Transfer
Agent receives written  instructions  terminating or changing those  privileges.
After you establish  AccountLink  for your  account,  any change of bank account
information  must be made by  signature-guaranteed  instructions to the Transfer
Agent signed by all shareholders who own the account.

PHONELINK.  PhoneLink is the  OppenheimerFunds  automated  telephone system that
enables shareholders to perform a number of account  transactions  automatically
using a touch-tone  phone.  PhoneLink  may be used on  already-established  Fund
accounts after you obtain a Personal Identification Number (PIN), by calling the
special PhoneLink number, 1.800.533.3310.

Purchasing Shares.  You may purchase  shares in amounts up to $100,000 by phone,
      by  calling   1.800.533.3310.   You  must  have  established   AccountLink
      privileges  to link  your  bank  account  with the  Fund to pay for  these
      purchases.

Exchanging  Shares.  With the  OppenheimerFunds  Exchange  Privilege,  described
      below,  you can  exchange  shares  automatically  by phone  from your Fund
      account to another  OppenheimerFunds  account you have already established
      by calling the special PhoneLink number.

Selling Shares. You can redeem shares by telephone  automatically by calling the
      PhoneLink  number  and the Fund will send the  proceeds  directly  to your
      AccountLink bank account.  Please refer to "How to Sell Shares," below for
      details.

CAN YOU SUBMIT  TRANSACTION  REQUESTS BY FAX? You may send  requests for certain
types of account transactions to the Transfer Agent by fax (telecopier).  Please
call 1.800.525.7048 for information about which transactions may be handled this
way.  Transaction  requests  submitted  by fax are subject to the same rules and
restrictions as written and telephone requests described in this Prospectus.

OPPENHEIMERFUNDS  INTERNET WEB SITE. You can obtain  information about the Fund,
as well as your account balance, on the  OppenheimerFunds  Internet web site, at
http://www.oppenheimerfunds.com.   Additionally,   shareholders  listed  in  the
account  registration  (and the dealer of record)  may request  certain  account
transactions  through a special  section of that web site.  To  perform  account
transactions,  you must first obtain a personal  identification  number (PIN) by
calling  the  Transfer  Agent  at  1.800.533.3310.  If you do not  want  to have
Internet  account  transaction  capability  for your  account,  please  call the
Transfer Agent at 1.800.525.7048.

AUTOMATIC  WITHDRAWAL AND EXCHANGE PLANS. The Fund has several plans that enable
you to sell shares  automatically  or exchange them to another  OppenheimerFunds
account on a regular  basis.  Please  call the  Transfer  Agent or  consult  the
Statement of Additional Information for details.

REINVESTMENT  PRIVILEGE.  If you  redeem  some or all of your Class A or Class B
shares  of the  Fund,  you have up to 6 months  to  reinvest  all or part of the
redemption  proceeds  in Class A shares of the Fund or other  Oppenheimer  funds
without  paying a sales charge.  This  privilege  applies only to Class A shares
that you purchased  subject to an initial sales charge and to Class A or Class B
shares on which you paid a  contingent  deferred  sales charge when you redeemed
them. You must be sure to ask the  Distributor  for this privilege when you send
your payment.

How to Sell Shares

You can sell  (redeem)  some or all of your shares on any regular  business day.
Your shares will be sold at the next net asset value calculated after your order
is received in proper form (which means that it must comply with the  procedures
described  below) and is accepted by the Transfer Agent.  The Fund lets you sell
your shares by writing a letter or by  telephone.  You can also set up Automatic
Withdrawal  Plans to redeem  shares on a regular  basis.  If you have  questions
about any of these  procedures,  and especially if you are redeeming shares in a
special  situation,  such as due to the  death  of the  owner,  please  call the
Transfer Agent first, at 1.800.525.7048, for assistance.

Certain Requests Require a Signature Guarantee. To protect you and the Fund from
      fraud,  the  following  redemption  requests  must be in writing  and must
      include a signature guarantee (although there may be other situations that
      also require a signature guarantee):
   o  You wish to redeem $100,000 or more and receive a check
   o The  redemption  check is not payable to all  shareholders  listed on the
     account statement
   o  The redemption check is not sent to the address of record on your account
      statement
   o Shares are being  transferred  to a Fund account with a different  owner or
   name o Shares are being redeemed by someone (such as an Executor)  other than
   the
      owners

Where Can You Have Your Signature  Guaranteed?  The Transfer Agent will accept a
      guarantee  of  your  signature  by a  number  of  financial  institutions,
      including:
o     a U.S. bank, trust company, credit union or savings association,
o     a foreign bank that has a U.S. correspondent bank,
o     a U.S. registered dealer or broker in securities, municipal securities or
      government securities, or
o    a U.S. national securities exchange, a registered securities  association
     or a clearing agency.
      If you are  signing  on  behalf  of a  corporation,  partnership  or other
      business  or as a  fiduciary,  you must  also  include  your  title in the
      signature.

HOWDO I SELL SHARES BY MAIL?  Write a letter of  instructions  that includes:  o
   Your name o The Fund's name o Your Fund  account  number  (from your  account
   statement)  o The  dollar  amount or number  of shares to be  redeemed  o Any
   special payment  instructions o Any share certificates for the shares you are
   selling o The signatures of all  registered  owners exactly as the account is
   registered,
      and
   o  Any special  documents  requested by the Transfer  Agent to assure  proper
      authorization of the person asking to sell the shares.

--------------------------------------------------------------------------------
---------------------------------------- ---------------------------------------
Use the following address for            Send courier or express mail
---------------------------------------- requests to:
requests by mail:                        OppenheimerFunds Services
OppenheimerFunds Services                10200 E. Girard Avenue, Building D
P.O. Box 5270                            Denver, Colorado 80231
Denver, Colorado 80217-5270
--------------------------------------------------------------------------------

HOW DO YOU SELL  SHARES BY  TELEPHONE?  You and your  dealer  representative  of
record may also sell your shares by telephone.  To receive the redemption  price
calculated  on a  particular  business  day,  your call must be  received by the
Transfer  Agent by the close of The New York Stock  Exchange that day,  which is
normally 4:00 P.M.,  but may be earlier on some days.  You may not redeem shares
held under a share certificate by telephone.
   o To redeem shares through a service representative, call 1.800.852.8457 o To
   redeem shares automatically on PhoneLink, call 1.800.533.3310

      Whichever  method you use, you may have a check sent to the address on the
account statement, or, if you have linked your Fund account to your bank account
on AccountLink, you may have the proceeds sent to that bank account.

                            ARE THERE LIMITS ON AMOUNTS REDEEMED BY TELEPHONE?

Telephone Redemptions Paid by Check. Up to $100,000 may be redeemed by telephone
      in any 7-day period.  The check must be payable to all owners of record of
      the shares and must be sent to the address on the account statement.  This
      service is not  available  within 30 days of  changing  the  address on an
      account.

Telephone  Redemptions  Through  AccountLink.  There  are no  dollar  limits  on
      telephone  redemption  proceeds sent to a bank account designated when you
      establish AccountLink. Normally the ACH transfer to your bank is initiated
      on the business day after the redemption.  You do not receive dividends on
      the  proceeds  of the shares  you  redeemed  while they are  waiting to be
      transferred.

CHECKWRITING.  To write checks against your Fund account, request that privilege
on your account application,  or contact the Transfer Agent for signature cards.
They must be signed  (with a signature  guarantee)  by all owners of the account
and  returned  to the  Transfer  Agent so that checks can be sent to you to use.
Shareholders  with joint  accounts can elect in writing to have checks paid over
the  signature  of one  owner.  If you  previously  signed a  signature  card to
establish  checkwriting in another  Oppenheimer fund, simply call 1.800.525.7048
to request  checkwriting for an account in this Fund with the same  registration
as the other account.
   o  Checks can be written to the order of  whomever  you wish,  but may not be
      cashed at the bank the checks are payable through or the Fund's  custodian
      bank.
   o  Checkwriting privileges are not available for accounts holding shares that
      are subject to a contingent deferred sales charge.
   o Checks must be written for at least $100.
   o  Checks  cannot be paid if they are  written  for more  than  your  account
      value. Remember, your shares fluctuate in value and you should not write a
      check close to the total account value.
   o  You may not write a check that  would  require  the Fund to redeem  shares
      that were  purchased by check or Asset  Builder Plan  payments  within the
      prior 10 days.
   o  Don't use your checks if you changed your Fund account  number,  until you
      receive new checks.

CAN YOU SELL SHARES THROUGH YOUR DEALER?  The Distributor has made  arrangements
to repurchase Fund shares from dealers and brokers on behalf of their customers.
Brokers or dealers may charge for that  service.  If your shares are held in the
name of your dealer, you must redeem them through your dealer.

How to Exchange Shares

Shares of the Fund may be exchanged for shares of certain  Oppenheimer  funds at
net asset value per share at the time of exchange,  without sales charge. Shares
of the Fund can be purchased by exchange of shares of other Oppenheimer funds on
the same basis. To exchange shares, you must meet several conditions:
   o  Shares of the fund  selected  for exchange  must be available  for sale in
      your state of residence.
   o The  prospectuses  of both funds must offer the exchange  privilege.  o You
   must hold the shares you buy when you establish your account for at least
      7 days before you can exchange them. After the account is open 7 days, you
      can exchange shares every regular business day.
   o  You must meet the minimum purchase  requirements for the fund whose shares
      you purchase by exchange.
   o Before exchanging into a fund, you must obtain and read its prospectus.

      Shares of a particular  class of the Fund may be exchanged only for shares
of the same class in the other Oppenheimer funds. For example,  you can exchange
Class A shares of this Fund only for  Class A shares of  another  fund.  In some
cases, sales charges may be imposed on exchange transactions.  For tax purposes,
exchanges  of  shares  involve  a sale of the  shares  of the fund you own and a
purchase of the shares of the other fund,  which may result in a capital gain or
loss.  Please refer to "How to Exchange  Shares" in the  Statement of Additional
Information for more details.

      You can find a list of Oppenheimer funds currently available for exchanges
in the  Statement of Additional  Information  or obtain one by calling a service
representative at 1.800.525.7048. That list can change from time to time.

HOW DO YOU SUBMIT EXCHANGE REQUESTS? Exchanges may be requested in writing or by
telephone:

Written Exchange  Requests.  Submit an  OppenheimerFunds  Exchange Request form,
      signed by all owners of the account.  Send it to the Transfer Agent at the
      address on the back cover.  Exchanges  of shares  held under  certificates
      cannot be processed  unless the Transfer  Agent  receives the  certificate
      with the request.

Telephone Exchange  Requests.  Telephone exchange requests may be made either by
      calling a service representative at 1.800.852.8457,  or by using PhoneLink
      for automated exchanges by calling 1.800.533.3310. Telephone exchanges may
      be made only between  accounts that are  registered  with the same name(s)
      and  address.  Shares  held under  certificates  may not be  exchanged  by
      telephone.

ARE THERE  LIMITATIONS  ON EXCHANGES?  There are certain  exchange  policies you
should be aware of:
   o  Shares are normally  redeemed from one fund and  purchased  from the other
      fund in the exchange transaction on the same regular business day on which
      the  Transfer  Agent  receives an exchange  request  that  conforms to the
      policies described above. It must be received by the close of The New York
      Stock Exchange that day, which is normally 4:00 P.M. but may be earlier on
      some days.  However,  either fund may delay the  purchase of shares of the
      fund you are exchanging into up to seven days if it determines it would be
      disadvantaged by a same-day exchange. For example, the receipt of multiple
      exchange  request  from a "market  timer"  might  require the Fund to sell
      securities at a disadvantageous time and/or price.
   o  Because excessive trading can hurt fund performance and harm shareholders,
      the Fund  reserves  the  right to  refuse  any  exchange  request  that it
      believes will  disadvantage  it, or to refuse multiple  exchange  requests
      submitted by a shareholder or dealer.
   o  The Fund may amend,  suspend or terminate  the  exchange  privilege at any
      time.  The Fund will provide you notice  whenever it is required to do so,
      by  applicable  law,  but it may  impose  these  changes  at any  time for
      emergency purposes.
   o  If the Transfer Agent cannot  exchange all the shares you request  because
      of a restriction  cited above,  only the shares eligible for exchange will
      be exchanged.

Shareholder Account Rules and Policies

More information  about the Fund's policies and procedures for buying,  selling,
and exchanging shares is contained in the Statement of Additional Information.

The   offering  of  shares  may be  suspended  during  any  period  in which the
      determination  of net asset value is  suspended,  and the  offering may be
      suspended by the Board of  Directors at any time the Board  believes it is
      in the Fund's best interest to do so.

Telephone transaction privileges for purchases,  redemptions or exchanges may be
      modified,  suspended or  terminated by the Fund at any time. If an account
      has more than one owner,  the Fund and the Transfer  Agent may rely on the
      instructions of any one owner. Telephone privileges apply to each owner of
      the account and the dealer representative of record for the account unless
      the Transfer Agent receives cancellation instructions from an owner of the
      account.

The   Transfer Agent will record any telephone  calls to verify data  concerning
      transactions  and has adopted other  procedures to confirm that  telephone
      instructions   are   genuine,   by   requiring   callers  to  provide  tax
      identification  numbers and other  account  data or by using PINs,  and by
      confirming such  transactions in writing.  The Transfer Agent and the Fund
      will not be  liable  for  losses  or  expenses  arising  out of  telephone
      instructions reasonably believed to be genuine.

Redemption or transfer  requests  will not be honored  until the Transfer  Agent
      receives all required  documents  in proper form.  From time to time,  the
      Transfer Agent in its discretion may waive certain of the requirements for
      redemptions stated in this Prospectus.

Dealers that can perform account transactions for their clients by participating
      in NETWORKING  through the National  Securities  Clearing  Corporation are
      responsible  for  obtaining  their  clients'  permission  to perform those
      transactions, and are responsible to their clients who are shareholders of
      the Fund if the dealer performs any transaction erroneously or improperly.

The   redemption price for shares will vary from day to day because the value of
      the securities in the Fund's portfolio  fluctuates.  The redemption price,
      which is the net asset  value per  share,  will  normally  differ for each
      class of shares.  The redemption  value of your shares may be more or less
      than their original cost.

Payment for redeemed shares ordinarily is made in cash. It is forwarded by check
      or through  AccountLink (as elected by the shareholder)  within seven days
      after the Transfer Agent receives redemption  instructions in proper form.
      However,  under unusual  circumstances  determined by the  Securities  and
      Exchange  Commission,  payment may be delayed or  suspended.  For accounts
      registered  in the  name of a  broker-dealer,  payment  will  normally  be
      forwarded within three business days after redemption.

The   Transfer  Agent may delay  forwarding a check or  processing a payment via
      AccountLink  for recently  purchased  shares,  but only until the purchase
      payment  has  cleared.  That delay may be as much as 10 days from the date
      the shares  were  purchased.  That  delay may be  avoided if you  purchase
      shares by Federal Funds wire or certified check, or arrange with your bank
      to provide  telephone or written assurance to the Transfer Agent that your
      purchase payment has cleared.

Involuntary redemptions of small accounts may be made by the Fund if the account
      value has  fallen  below  $500 for  reasons  other  than the fact that the
      market value of shares has dropped. In some cases involuntary  redemptions
      may be made to repay the Distributor  for losses from the  cancellation of
      share purchase orders.

Sharesmay be "redeemed in kind" under unusual  circumstances  (such as a lack of
      liquidity in the Fund's  portfolio to meet  redemptions).  This means that
      the  redemption  proceeds  will be paid with  liquid  securities  from the
      Fund's portfolio.

"Backup  Withholding"  of  Federal  personalincome  tax may be  applied  against
      taxable  dividends,   distributions  and  redemption  proceeds  (including
      exchanges) if you fail to furnish the Fund your correct,  certified Social
      Security or Employer Identification Number when you sign your application,
      or if you under-report your income to the Internal Revenue Service.

To    avoid sending  duplicate copies of materials to households,  the Fund will
      mail only one copy of each annual and  semi-annual  report to shareholders
      having the same last name and address on the Fund's records. However, each
      shareholder  may call the  Transfer  Agent at  1.800.525.7048  to ask that
      copies of those materials be sent personally to that shareholder.

Dividends and Tax Information

DIVIDENDS.  The Fund  intends to declare  dividends  separately  for Class A and
Class B shares from net  tax-exempt  income  and/or net  investment  income each
regular  business day and to pay those  dividends to  shareholders  monthly on a
date selected by the Board of Directors. Daily dividends will not be declared or
paid on  newly-purchased  shares until  Federal  Funds are available to the Fund
from the purchase payment for these shares.

      The Fund attempts to pay dividends on Class A shares at a constant  level.
There is no assurance  that it will be able to do so. The Board of Directors may
change  the  targeted  dividend  level at any  time,  without  prior  notice  to
shareholders.  Additionally, the amount of those dividends and the distributions
paid on Class B shares may vary over time,  depending on market conditions,  the
composition of the Fund's portfolio,  and expenses borne by the particular class
of shares.  Dividends  paid on Class A shares will  generally be higher than for
Class B shares,  which normally have higher  expenses than Class A. There can be
no guarantee that the Fund will pay any dividends or distributions.

CAPITAL  GAINS.  Although the Fund does not seek capital  gains,  it may realize
capital  gains  on the sale of  portfolio  securities.  If it does,  it may make
distributions  out of any net short-term or long-term  capital gains in December
of each year.  The Fund may make  supplemental  distributions  of dividends  and
capital gains following the end of its fiscal year

WHAT  CHOICES  DO YOU  HAVE FOR  RECEIVING  DISTRIBUTIONS?  When  you open  your
account,  specify on your application how you want to receive your dividends and
distributions. You have four options:

Reinvest All Distributions in the Fund.  You can elect to reinvest all dividends
      and capital gains distributions in additional shares of the Fund.

Reinvest  Dividend  or  Capital  Gains  Only.  You can  elect to  reinvest  some
      distributions  (dividends,  short-term  capital gains or long-term capital
      gains   distributions)   in  the  Fund  while  receiving  other  types  of
      distributions  by check or having them sent to your bank  account  through
      AccountLink.

Receive All  Distributions  in Cash.  You can  elect to  receive a check for all
      dividends and capital gains  distributions  or have them sent to your bank
      through AccountLink.

Reinvest  Your  Distributions  in  Another  OppenheimerFunds  Account.  You  can
      reinvest  all  distributions  in the  same  class  of  shares  of  another
      OppenheimerFunds account you have established.

TAXES. Dividends paid from net investment income earned by the Fund on municipal
securities will be excludable from gross income for federal  personal income tax
purposes.  A portion of a dividend that is derived from interest paid on certain
"private  activity bonds" may be an item of tax preference if you are subject to
the alternative minimum tax. If the Fund earns interest on taxable  investments,
any dividends  derived from those earnings will be taxable as ordinary income to
shareholders.

      Dividends  paid  by  the  Fund  from  interest  on  California   municipal
securities will be exempt from California personal income taxes, if at the close
of each  quarter at least 50% of the value of the Fund's  assets are invested in
debt obligations that pay interest exempt from California personal income taxes.
Dividends  paid  from  income  from  municipal  securities  of  issuers  outside
California will normally be subject to California personal income taxes.

      Dividends and capital gains distributions may be subject to state or local
taxes.  Long-term  capital  gains are taxable as  long-term  capital  gains when
distributed  to  shareholders.  It does not  matter  how long you have held your
shares.  Dividends  paid from  short-term  capital gains are taxable as ordinary
income.  Whether you reinvest your  distributions  in additional  shares or take
them in cash,  the tax treatment is the same.  Every year the Fund will send you
and the IRS a  statement  showing  the amount of any  taxable  distribution  you
received in the previous year as well as the amount of your  tax-exempt  income.
Long-term capital gains will be separately identified in the tax information the
Fund sends you after the end of the calendar year.

Remember,  There May be Taxes on  Transactions.  Even  though  the Fund seeks to
      distribute tax-exempt income to shareholders,  you may have a capital gain
      or loss when you sell or exchange  your shares.  A capital gain or loss is
      the difference between the price you paid for the shares and the price you
      received when you sold them.  Any capital gain is subject to capital gains
      tax.

Returns of Capital Can Occur. In certain cases,  distributions  made by the Fund
      may be considered a non-taxable return of capital to shareholders. If that
      occurs, it will be identified in notices to shareholders.

      This  information is only a summary of certain federal personal income tax
information  about your  investment.  You should  consult  with your tax adviser
about the effect of an investment in the Fund on your particular tax situation.


<PAGE>


                            Financial Highlights

The Financial  Highlights  Table is presented to help you  understand the Fund's
financial  performance  for  the  past 6  fiscal  periods.  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  the  Fund   (assuming   reinvestment   of  all   dividends  and
distributions).  This information has been audited by Deloitte & Touche LLP, the
Fund's  independent  auditors,  whose  report,  along with the Fund's  financial
statements,  is included in the  Statement of Additional  Information,  which is
available on request.

<PAGE>


139

<PAGE>


FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>

Year                    Year

Ended                   Ended

August 31,                June 30,
Class A                                                 1999       1998
1997       1996(1)      1996         1995
=========================================================================================================================
<S>                                                <C>         <C>
<C>        <C>        <C>          <C>
PER SHARE OPERATING DATA

Net asset value, beginning of period                  $13.02      $12.64
$12.16     $12.15      $12.09       $11.82
-------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                    .65         .65
 .73        .12         .73          .73
Net realized and unrealized gain (loss)                 (.82)        .51
 .49        .01         .07          .27

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

Total income (loss) from
investment operations                                   (.17)       1.16
1.22        .13         .80         1.00
-------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                    (.64)       (.67)
(.74)       (.12)       (.73)        (.69)
Dividends in excess of
net investment income                                     --          --
--         --          --         (.04)
Distributions from net realized gain                      --        (.11)
--         --          --           --
Distributions in excess of net realized gain              --          --
--         --        (.01)          --

--------------------------------------------------------------------
Total dividends and distributions
to shareholders                                         (.64)       (.78)
(.74)      (.12)       (.74)        (.73)
-------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                        $12.21      $13.02
$12.64     $12.16      $12.15       $12.09

====================================================================

=========================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                    (1.42)%      9.33%
10.24%      1.12%       6.73%        8.93%

=========================================================================================================================
RATIOS/SUPPLEMENTAL DATA

Net assets, end of period (in thousands)            $109,575    $109,811
$89,991    $76,817     $76,913      $78,134
-------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                   $111,996    $ 99,678
$80,311    $77,584     $78,676      $76,148
-------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                   5.03%       5.04%
5.91%      6.00%       5.99%        6.27%
Expenses, before voluntary assumption
and indirect expenses                                   0.67%       0.69%(4)
0.59%(4)   0.57%(4)    0.58%(4)    0.57%(4)
Expenses, after voluntary assumption
and indirect expenses                                   0.51%       0.53%
N/A       N/A          N/A         N/A
-------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                25%         30%
46%         1%         33%         14%
</TABLE>


1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended August 31, 1999 were $48,357,555 and $35,079,315, respectively.


             21  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>

FINANCIAL HIGHLIGHTS Continued


<TABLE>
<CAPTION>

YEAR                    YEAR

ENDED                   ENDED

AUGUST 31,                JUNE 30,
CLASS B                                              1999           1998
1997         1996(1)        1996       1995
----------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>
<C>           <C>           <C>        <C>
PER SHARE OPERATING DATA
Net asset value, beginning of period              $13.01          $12.63
$12.14        $12.14        $12.08     $11.80
----------------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                .53
 .54             .60           .10           .61        .62
Net realized and unrealized gain (loss)             (.83)
 .49             .50            --           .07        .27

--------------------------------------------------------------------------------
Total income (loss) from
investment operations                               (.30)           1.03
1.10           .10           .68        .89
----------------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                (.51)          (.54)
(.61)         (.10)         (.61)      (.57)
Dividends in excess of
net investment income                                 --
--               --            --            --       (.04)
Distributions from net realized gain                  --
(.11)              --            --            --         --
Distributions in excess of net realized gain          --
--               --            --          (.01)        --

--------------------------------------------------------------------------------
Total dividends and distributions
to shareholders                                     (.51)          (.65)
(.61)          (.10)         (.62)      (.61)
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                    $12.20         $13.01
$12.63         $12.14        $12.14     $12.08

================================================================================

==================================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                (2.41)%         8.24%
9.24%          0.85%         5.66%      7.90%

==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)         $29,730        $23,175
$11,919         $5,928        $5,442     $2,648
----------------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                $28,070        $18,087         $
8,129         $5,767        $3,848     $1,904
----------------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                               4.02%          4.19%
4.85%          4.92%         4.94%      5.17%
Expenses, before voluntary assumption
and indirect expenses                               1.67%          1.70%(4)
1.60%(4)       1.62%(4)      1.60%(4)  1.55%(4)
Expenses, after voluntary assumption
and indirect expenses                               1.52%
1.53%             N/A            N/A          N/A        N/A
----------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                            25%
30%             46%             1%           33%       14%
</TABLE>



1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for period of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended August 31, 1999 were $48,357,555 and $35,079,315, respectively.

             22  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND




<PAGE>


 INFORMATION AND SERVICES

For More Information on Oppenheimer Main Street California Municipal Fund(R):

The following additional  information about the Fund is available without charge
upon request:

STATEMENT  OF  ADDITIONAL   INFORMATION   This  document   includes   additional
information about the Fund's investment policies,  risks, and operations.  It is
incorporated by reference into this  Prospectus  (which means it is legally part
of this Prospectus).

ANNUAL  AND  SEMI-ANNUAL   REPORTS  Additional   information  about  the  Fund's
investments  and  performance is available in the Fund's Annual and  Semi-Annual
Reports to  shareholders.  The Annual  Report  includes a  discussion  of market
conditions  and investment  strategies  that  significantly  affected the Fund's
performance during its last fiscal year.

How to Get More Information

You can  request  the  Statement  of  Additional  Information,  the  Annual  and
Semi-Annual Reports, and other information about the Fund or your account:

--------------------------------------------------------------------------------
By Telephone:                            Call OppenheimerFunds Services
                                         toll-free:  1.800.525.7048
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
By Mail:                                 Write to:
                                         OppenheimerFunds Services
                                         P.O. Box 5270
                                         Denver, Colorado 80217-5270
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
On the Internet:                         You can send us a request by e-mail or
                                         read or down-load documents on the
                                         OppenheimerFunds web site:
                                         http://www.oppenheimerfunds.com
--------------------------------------------------------------------------------

You can also obtain copies of the Statement of Additional  Information and other
Fund  documents  and  reports by visiting  the SEC's  Public  Reference  Room in
Washington,  D.C.  (Phone  1.202.942.8090)  or the EDGAR  database  on the SEC's
Internet web site at http://www.sec.gov. Copies may be obtained after payment of
a  duplicating   fee  by  electronic   request  at  the  SEC's  e-mail  address:
[email protected]  or  by  writing  to  the  SEC's  Public  Reference  Section,
Washington, D.C. 20549-0102.

No one has been authorized to provide any information  about the Fund or to make
any  representations  about  the  Fund  other  than  what is  contained  in this
Prospectus.  This  Prospectus is not an offer to sell shares of the Fund,  nor a
solicitation  of an offer to buy shares of the Fund,  to any person in any state
or other jurisdiction where it is unlawful to make such an offer.

                                               The Fund's shares are distributed
by:
SEC File No. 811-5360                        (logo)OppenheimerFunds Distributor,
Inc.
PR0725.001.1299


<PAGE>


                          APPENDIX TO THE PROSPECTUS OF
OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

      Graphic  material  included in the Prospectus of  Oppenheimer  Main Street
California  Municipal  Fund ("the Fund") "Annual Total Returns (Class A)(% as of
12/31 each year)":

      A bar chart will be included in the  Prospectus of the Fund  depicting the
annual total returns of a hypothetical  investment in Class A shares of the Fund
for each of the eight  most  recent  calendar  years,  without  deducting  sales
charges.  Set forth below are the  relevant  data points that will appear in the
bar chart:


--------------------------------------------------------------------
Calendar Year Ended:             Annual Total Returns
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/91                         11.35%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/92                         8.35%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/93                         13.13%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/94                         -7.64%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/95                         19.72%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/96                         5.29%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/97                         10.38%
--------------------------------------------------------------------
--------------------------------------------------------------------
12/31/98                         6.33%
--------------------------------------------------------------------



<PAGE>


Oppenheimer Main Street California Municipal Fund(R)

6803 South Tucson Way, Englewood, Colorado 80112
1-800-525-7048

Statement of Additional Information dated December 22, 1999

      This  Statement  of  Additional  Information  is  not a  Prospectus.  This
document  contains  additional   information  about  the  Fund  and  supplements
information  in the  Prospectus  dated  December  22,  1999.  It  should be read
together  with the  Prospectus,  which may be  obtained by writing to the Fund's
Transfer Agent,  OppenheimerFunds  Services, at P.O. Box 5270, Denver,  Colorado
80217, or by calling the Transfer Agent at the toll-free  number shown above, or
by   downloading   it  from   the   OppenheimerFunds   Internet   web   site  at
www.oppenheimerfunds.com.

Contents
                                                                            Page
About the Fund
Additional Information About the Fund's Investment Policies and Risks.......2
    The Fund's Investment Policies..........................................2
    Other Investment Techniques and Strategies.............................12
    Investment Restrictions................................................25
How the Fund is Managed ...................................................28
    Organization and History...............................................28
    Directors and Officers.................................................29
    The Manager............................................................35
Brokerage Policies of the Fund.............................................37
Distribution and Service Plans.............................................38
Performance of the Fund....................................................41

About Your Account
How To Buy Shares..........................................................47
How To Sell Shares.........................................................55
How To Exchange Shares.....................................................60
Dividends, Capital Gains and Taxes.........................................62
Additional Information About the Fund......................................65
67
Financial Information About the Fund
Independent Auditors' Report...............................................67
Financial Statements.......................................................68

Appendix A: Municipal Bond Ratings Definitions............................A-1
Appendix B: Industry Classifications......................................B-1
Appendix C: Special Sales Charge Arrangements and Waivers.................C-1
--------------------------------------------------------------------------------


<PAGE>


A B O U T  T H E  F U N D
--------------------------------------------------------------------------------

                            Additional Information About the Fund's Investment
Policies and Risks

The investment  objective,  the principal investment policies and the main risks
of the Fund are  described  in the  Prospectus.  This  Statement  of  Additional
Information contains supplemental information about those policies and risks and
the types of securities that the Fund's  investment  Manager,  OppenheimerFunds,
Inc., can select for the Fund. Additional information is also provided about the
strategies that the Fund can use to try to achieve its objective.

The Fund's Investment Policies.  The composition of the Fund's portfolio and the
techniques and strategies that the Fund's Manager can use in selecting portfolio
securities  will  vary over  time.  The Fund is not  required  to use all of the
investment techniques and strategies described below in seeking its goal. It can
use some of the special  investment  techniques  and strategies at some times or
not at all.

      The Fund does not make  investments  with the objective of seeking capital
growth,  since that would  generally  be  inconsistent  with its goal of seeking
tax-exempt income.  However, the value of the securities held by the Fund may be
affected by changes in general interest rates. Because the current value of debt
securities  varies  inversely  with changes in  prevailing  interest  rates,  if
interest rates  increased  after a security was  purchased,  that security would
normally  decline in value.  Conversely,  if interest  rates  decreased  after a
security was purchased, normally its value would rise.

      However, those fluctuations in value will not generally result in realized
gains or  losses  to the  Fund  unless  the Fund  sells  the  security  prior to
maturity.  A debt  security held to maturity is redeemable by its issuer at full
principal  value plus  accrued  interest.  The Fund does not  usually  intend to
dispose of securities prior to their maturity,  but may do so for liquidity,  or
because of other investment  reasons,  such as factors affecting the issuer that
cause the Manager to sell the particular security.  In that case, the Fund could
experience a capital gain or loss on the sale.

      There are variations in the credit quality of municipal  securities,  both
within a particular rating  classification  and between  classifications.  These
variations depend on numerous factors. The yields of municipal securities depend
on a number of factors, including general conditions in the municipal securities
market,  the size of a particular  offering,  the maturity of the obligation and
rating (if any) of the issue.  These  factors are  discussed  in greater  detail
below.

|X| Portfolio  Turnover.  "Portfolio  turnover"  describes the rate at which the
Fund traded its portfolio  securities  during its last fiscal year. For example,
if a fund sold all of its  securities  during the year,  its portfolio  turnover
rate would have been 100%.  Short-term  trading  increases the rate of portfolio
turnover and could  increase the Fund's  transaction  costs.  However,  the Fund
ordinarily  incurs  little or no  brokerage  expense  because most of the Fund's
portfolio  transactions  are  principal  trades that do not  require  payment of
brokerage  commissions.  Additionally,  the  realization  of capital  gains from
selling  portfolio  securities may result in distributions of taxable  long-term
capital gains to  shareholders,  since the Fund will normally  distribute all of
its capital  gains  realized each year, to avoid excise taxes under the Internal
Revenue Code.

          The Fund  ordinarily does not trade  securities to achieve  short-term
    capital  gains,  because they would not be tax-exempt  income.  To a limited
    degree,  the Fund can  engage  in  short-term  trading  to  attempt  to take
    advantage of short-term market variations. It can also do so to dispose of a
    portfolio  security  prior to its  maturity.  That  might be done if, on the
    basis of a revised credit evaluation of the issuer or other  considerations,
    the Fund believes such disposition advisable or it needs to generate cash to
    satisfy requests to redeem Fund shares. In those cases, the Fund may realize
    a capital  gain or loss on its  investments.  The  Fund's  annual  portfolio
    turnover rate normally is not expected to exceed 100%.

Municipal  Securities.  The types of municipal  securities in which the Fund can
invest are  described in the  Prospectus  under "About the Fund's  Investments."
Municipal  securities  generally include general obligation bonds, revenue bonds
and  notes,  and  municipal  lease  interests.   A  discussion  of  the  general
characteristics of these principal types of municipal securities follows below.

      |X| Municipal Bonds. We have classified  longer term municipal  securities
as "municipal bonds." The principal classifications of long-term municipal bonds
are "general obligation" and "revenue" (or "industrial development") bonds. They
may have fixed, variable or floating rates of interest, as described below.

      Some bonds may be  "callable,"  allowing  the issuer to redeem them before
their maturity date. To protect  bondholders,  callable bonds may be issued with
provisions that prevent them from being called for a period of time.  Typically,
that is 5 to 10 years from the issuance date.  When interest  rates decline,  if
the call protection on a bond has expired, it is more likely that the issuer may
call the bond.  If that occurs,  the Fund might have to reinvest the proceeds of
the called bond in bonds that pay a lower rate of return.

         |_|  General  Obligation  Bonds.  The  basic  security  behind  general
obligation  bonds is the issuer's pledge of its full faith and credit and taxing
power for the  repayment  of principal  and the payment of interest.  Issuers of
general obligation bonds include states,  counties,  cities, towns, and regional
districts.  The proceeds of these  obligations  are used to fund a wide range of
public projects,  including construction or improvement of schools, highways and
roads, and water and sewer systems. The rate of taxes that can be levied for the
payment  of  debt   service  on  these  bonds  may  be  limited  or   unlimited.
Additionally,  there may be limits on the rate or amount of special  assessments
that can be levied to meet these obligations.

         |_|  Revenue  Bonds.  The  principal  security  for a  revenue  bond is
generally  the  net  revenues  derived  from a  particular  facility,  group  of
facilities,  or, in some cases,  the  proceeds of a special  excise tax or other
specific  revenue source.  Revenue bonds are issued to finance a wide variety of
capital  projects.  Examples  include  electric,  gas,  water and sewer systems;
highways,  bridges,  and  tunnels;  port and airport  facilities;  colleges  and
universities; and hospitals.



<PAGE>


      Although  the  principal  security  for these types of bonds may vary from
bond to bond,  many  provide  additional  security in the form of a debt service
reserve fund that may be used to make  principal  and  interest  payments on the
issuer's  obligations.  Housing finance  authorities  bonds have a wide range of
security, including partially or fully insured mortgages, rent subsidized and/or
collateralized  mortgages,  and/or the net revenues from housing or other public
projects.  Some  authorities  provide further  security in the form of a state's
ability (without obligation) to make up deficiencies in the debt service reserve
fund.

         |_| Industrial  Development  Bonds.  Industrial  development  bonds are
considered  municipal  bonds if the interest paid is exempt from federal  income
tax.  They are issued by or on behalf of public  authorities  to raise  money to
finance various privately  operated  facilities for business and  manufacturing,
housing,  sports, and pollution control. These bonds may also be used to finance
public  facilities such as airports,  mass transit systems,  ports, and parking.
The payment of the principal  and interest on such bonds is dependent  solely on
the ability of the  facility's  user to meet its financial  obligations  and the
pledge,  if any, of real and personal  property financed by the bond as security
for those payments.

         |_|  Mello-Roos  Bonds.  These are bonds  issued  under the  California
Mello-Roos  Community  Facilities  Act. They are used to finance  infrastructure
projects,  such as roads or sewage  treatment  plants.  In most  cases  they are
secured by real estate taxes levied on property located in the same community as
the project.  This type of financing was created in response to statutory limits
on real  property  taxes  that  were  enacted  in  California.  The bonds do not
constitute an obligation of a municipal government.  Timely payment of principal
and  interest  depends on the ability of the  developer  of the project or other
property  owners to pay their  real  estate  taxes.  Therefore  these  bonds are
subject to risks of nonpayment as a result of a general  economic of real estate
market decline or decline in the real estate market,  as well as the credit risk
of the developer.

         |_| Private Activity Municipal  Securities.  The Tax Reform Act of 1986
(the "Tax Reform Act") reorganized,  as well as amended, the rules governing tax
exemption for interest on certain types of municipal securities.  The Tax Reform
Act  generally  did not change  the tax  treatment  of bonds  issued in order to
finance  governmental  operations.  Thus,  interest on general  obligation bonds
issued by or on behalf of state or local governments,  the proceeds of which are
used to finance the operations of such governments,  continues to be tax-exempt.
However,   the  Tax  Reform  Act  limited  the  use  of  tax-exempt   bonds  for
non-governmental  (private) purposes. More stringent restrictions were placed on
the use of proceeds of such bonds. Interest on certain private activity bonds is
taxable  under  the  revised  rules.  There  is  an  exception  for  "qualified"
tax-exempt private activity bonds: for example,  exempt facility bonds including
certain  industrial  development  bonds,  qualified  mortgage  bonds,  qualified
Section 501(c)(3) bonds, and qualified student loan bonds.

      In addition, limitations on the amount of private activity bonds that each
state may issue were revised  downward by the Tax Reform Act,  which has reduced
the supply of such bonds. The value of the Fund's portfolio could be affected if
there is a further reduction in the availability of such bonds.

      Interest on certain  private  activity  bonds issued after August 7, 1986,
which  continues  to be  tax-exempt,  will be treated as a tax  preference  item
subject  to the  alternative  minimum  tax  (discussed  below) to which  certain
taxpayers are subject.  The Fund may hold  municipal  securities the interest on
which (and thus a proportionate share of the  exempt-interest  dividends paid by
the Fund) will be subject to the federal  alternative minimum tax on individuals
and corporations.

      The federal alternative minimum tax is designed to ensure that all persons
who receive  income pay some tax,  even if their  regular  tax is zero.  This is
accomplished in part by including in taxable income certain tax preference items
that are used to calculate  alternative  minimum taxable income.  The Tax Reform
Act  made  tax-exempt  interest  from  certain  private  activity  bonds  a  tax
preference item for purposes of the  alternative  minimum tax on individuals and
corporations.  Any  exempt-interest  dividend  paid  by a  regulated  investment
company will be treated as interest on a specific private activity bond based on
a ratio  between the  interest  the Fund  receives  and the total  amount of the
Fund's exempt interest dividends.

      In addition, under some circumstances,  corporate taxpayers subject to the
alternative  minimum  tax  may  have to  include  exempt-interest  dividends  in
calculating  their alternative  minimum taxable income.  That could occur if the
"adjusted  current earnings" of the corporation  exceed its alternative  minimum
taxable income.

      To determine whether a municipal  security is treated as a taxable private
activity  bond,  it is subject to a test for:  (a) a trade or  business  use and
security  interest,  or (b) a  private  loan  restriction.  Under  the  trade or
business use and security  interest  test, an  obligation is a private  activity
bond if: (i) more than 10% of the bond  proceeds  are used for private  business
purposes  and (ii) 10% or more of the  payment of  principal  or interest on the
issue is directly or  indirectly  derived from such private use or is secured by
the privately used property or the payments  related to the use of the property.
For certain types of uses, a 5% threshold is substituted for the 10% threshold.

      The term  "private  business  use" means any direct or  indirect  use in a
trade or business  carried on by an  individual  or entity other than a state or
municipal  governmental unit. Under the private loan restriction,  the amount of
bond proceeds that may be used to make private loans is limited to the lesser of
5% or $5.0 million of the proceeds. Thus, certain issues of municipal securities
could lose their  tax-exempt  status  retroactively  if the issuer fails to meet
certain  requirements as to the expenditure of the proceeds of that issue or the
use of the bond-financed  facility. The Fund makes no independent  investigation
of the users of such bonds or their use of  proceeds  of the bonds.  If the Fund
should hold a bond that loses its tax-exempt status  retroactively,  there might
be  an  adjustment  to  the   tax-exempt   income   previously   distributed  to
shareholders.

      Additionally,  a private activity bond that would otherwise be a qualified
tax-exempt  private  activity bond will not, under Internal Revenue Code Section
147(a),  be a qualified  bond for any period during which it is held by a person
who is a "substantial user" of the facilities or by a "related person" of such a
substantial user. This "substantial  user" provision applies primarily to exempt
facility bonds,  including industrial  development bonds. The Fund can invest in
industrial  development bonds and other private activity bonds.  Therefore,  the
Fund may not be an appropriate  investment  for entities which are  "substantial
users" (or persons  related to "substantial  users") of such exempt  facilities.
Those entities and persons should consult their tax advisers  before  purchasing
shares of the Fund.

      A  "substantial  user"  of  such  facilities  is  defined  generally  as a
"non-exempt  person who  regularly  uses part of a facility"  financed  from the
proceeds  of exempt  facility  bonds.  Generally,  an  individual  will not be a
"related  person" under the Internal  Revenue Code unless such individual or the
individual's   immediate  family  (spouse,   brothers,   sisters  and  immediate
descendants)  own directly or indirectly in the aggregate more than 50% in value
of the equity of a corporation or partnership which is a "substantial user" of a
facility financed from the proceeds of exempt facility bonds.

|X| Municipal Notes.  Municipal  securities having a maturity (when the security
is  issued)  of less  than one  year are  generally  known as  municipal  notes.
Municipal  notes  generally are used to provide for short-term  working  capital
needs. Some of the types of municipal notes the Fund can invest in are described
below.

         |_| Tax Anticipation Notes. These are issued to finance working capital
needs of municipalities.  Generally,  they are issued in anticipation of various
seasonal tax revenue,  such as income,  sales,  use or other business taxes, and
are payable from these specific future taxes.

         |_| Revenue  Anticipation  Notes. These are notes issued in expectation
of receipt of other types of revenue,  such as federal revenues  available under
federal revenue-sharing programs.

         |_| Bond  Anticipation  Notes.  Bond  anticipation  notes are issued to
provide  interim  financing  until  long-term  financing  can be  arranged.  The
long-term  bonds  that are  issued  typically  also  provide  the  money for the
repayment of the notes.

         |_|  Construction  Loan  Notes.  These  are  sold  to  provide  project
construction   financing  until  permanent  financing  can  be  secured.   After
successful  completion and acceptance of the project,  it may receive  permanent
financing through public agencies, such as the Federal Housing Administration.

      |X|  Tax-Exempt  Commercial  Paper.  This  type of  short-term  obligation
(usually  having a maturity of 270 days or less) is issued by a municipality  to
meet current working capital needs.

      |X| Municipal Lease Obligations. The Fund's investments in municipal lease
obligations  may be through  certificates of  participation  that are offered to
investors by public  entities.  Municipal leases may take the form of a lease or
an installment purchase contract issued by a state or local government authority
to obtain funds to acquire a wide variety of equipment and facilities.

      Some municipal lease securities may be deemed to be "illiquid" securities.
Their  purchase  by the Fund would be limited as  described  below in  "Illiquid
Securities."  From  time to time  the Fund may  invest  more  than 5% of its net
assets in municipal  lease  obligations  that the Manager has  determined  to be
liquid under guidelines set by the Board of Directors.  Those guidelines require
the Manager to evaluate:
      o the frequency of trades and price quotations for such securities;  o the
      number of dealers or other potential buyers willing to purchase or
         sell such securities;  o the availability of  market-makers;  and o the
      nature of the trades for such securities.

      While the Fund holds such  securities,  the Manager will also evaluate the
likelihood of a continuing market for these securities and their credit quality.


      Municipal  leases  have  special  risk   considerations.   Although  lease
obligations do not constitute general  obligations of the municipality for which
the  municipality's  taxing power is pledged,  a lease  obligation is ordinarily
backed by the  municipality's  covenant to budget for,  appropriate and make the
payments due under the lease  obligation.  However,  certain  lease  obligations
contain  "non-appropriation"  clauses which provide that the municipality has no
obligation to make lease or installment purchase payments in future years unless
money is appropriated  for that purpose on a yearly basis.  While the obligation
might be secured by the lease, it might be difficult to dispose of that property
in case of a default.

      Projects  financed with  certificates of  participation  generally are not
subject to state constitutional debt limitations or other statutory requirements
that may apply to other municipal  securities.  Payments by the public entity on
the obligation  underlying the certificates  are derived from available  revenue
sources.  That  revenue  might be  diverted  to the  funding of other  municipal
service  projects.  Payments of interest  and/or  principal  with respect to the
certificates  are not  guaranteed and do not constitute an obligation of a state
or any of its political subdivisions.

      In addition to the risk of "non-appropriation," municipal lease securities
do not have as highly liquid a market as conventional municipal bonds. Municipal
leases,  like  other  municipal  debt  obligations,  are  subject to the risk of
non-payment of interest or repayment of principal by the issuer.  The ability of
issuers of  municipal  leases to make timely  lease  payments  may be  adversely
affected in general economic downturns and as relative governmental cost burdens
are reallocated among federal,  state and local governmental units. A default in
payment of income would  result in a reduction  of income to the Fund.  It could
also result in a reduction in the value of the municipal lease and that, as well
as a default in  repayment of  principal,  could result in a decrease in the net
asset value of the Fund.

      |X| Ratings of Municipal Securities. Ratings by ratings organizations such
as Moody's Investors  Service,  Standard & Poor's Rating Service and Fitch IBCA,
Inc.  represent the respective rating agency's opinions of the credit quality of
the municipal  securities  they  undertake to rate.  However,  their ratings are
general  opinions and are not guarantees of quality.  Municipal  securities that
have the same maturity, coupon and rating may have different yields, while other
municipal  securities  that have the same  maturity  and  coupon  but  different
ratings may have the same yield.

      Subsequent to its purchase by the Fund, a municipal  security may cease to
be rated or its rating may be reduced below the minimum required for purchase by
the Fund. Neither event requires the Fund to sell the security,  but the Manager
will consider  such events in  determining  whether the Fund should  continue to
hold the  security.  To the extent that  ratings  given by  Moody's,  Standard &
Poor's, or Fitch change as a result of changes in those rating  organizations or
their  rating  systems,  the Fund will  attempt  to use  comparable  ratings  as
standards for investments in accordance with the Fund's investment policies.

      The  Fund  can buy  municipal  securities  that  are  "pre-refunded."  The
issuer's  obligation to repay the  principal  value of the security is generally
collateralized with U.S. government securities placed in an escrow account. This
causes the  pre-refunded  security to have essentially the same risks of default
as a AAA-rated security.

      A list of the rating  definitions of Moody's,  S&P and Fitch for municipal
securities  is  contained  in  Appendix  A  to  this   Statement  of  Additional
Information.  Because  the Fund can  purchase  securities  that are  unrated  by
nationally  recognized  rating  organizations,  the  Manager  will  make its own
assessment of the credit  quality of unrated  issues the Fund buys.  The Manager
will use criteria similar to those used by the rating agencies,  and will assign
a rating category to a security that is comparable to what the Manager  believes
a rating agency would assign to that  security.  However,  the Manager's  rating
does not constitute a guarantee of the quality of a particular issue.

         |_| Special Risks of Lower-Grade Securities.  The Fund can invest up to
25% of its total assets in "lower grade" debt securities.  The Fund can do so to
seek current income.  Because lower-rated securities tend to offer higher yields
than investment grade securities,  the Fund can invest in lower grade securities
if the Manager is trying to achieve greater income.

      "Lower-grade" municipal securities include municipal bonds and notes rated
below "investment grade." That includes municipal bonds that have a rating lower
than "Baa" by Moody's or lower than "BBB" by Standard & Poor's or Duff & Phelps,
or similar ratings by other rating  organizations and municipal notes rated SP-2
by Standard & Poor's,  MIG by Moody's or F-2 by Fitch.  While  securities  rated
"Baa" by Moody's or "BBB" by Standard & Poor's are investment  grade and are not
regarded as junk bonds,  those  securities may be subject to special risks,  and
have some speculative  characteristics.  If municipal securities are unrated and
are  determined  by the Manager to be of comparable  quality to debt  securities
rated below  investment  grade,  those municipal  securities are included in the
limitation  on the  percentage  of the Fund's  assets  that can be  invested  in
lower-grade securities.

      Lower grade  securities may have a higher yield than  securities  rated in
the higher  rating  categories.  In addition to having a greater risk of default
than higher-grade securities there may be less of a market for these securities.
As a result they may be harder to sell at an acceptable  price.  The  additional
risks mean that the Fund may not  receive the  anticipated  level of income from
these securities,  and the Fund's net asset value may be affected by declines in
the value of


<PAGE>


lower-grade  securities.  However,  because  the  added  risk of  lower  quality
securities  might not be consistent  with the Fund's policy of  preservation  of
capital, the Fund limits its investments in lower quality securities.

      Some of the special credit risks of  lower-grade  securities are discussed
in the  Prospectus.  There is a greater  risk that the issuer may default on its
obligation to pay interest or to repay  principal than in the case of investment
grade securities.  The issuer's low  creditworthiness may increase the potential
for its  insolvency.  An overall decline in values in the high yield bond market
is also more likely during a period of a general economic downturn.  An economic
downturn or an increase in interest rates could severely  disrupt the market for
high yield bonds, adversely affecting the values of outstanding bonds as well as
the ability of issuers to pay interest or repay principal.  However,  the Fund's
limitations on these  investments  may reduce,  to the Fund's  exposure to those
risks.

Special Risks of Investing Primarily in California Municipal Securities. Because
the Trust focuses its investments  primarily on California municipal securities,
the  value of its  portfolio  investments  will be  highly  sensitive  to events
affecting   the  fiscal   stability   of  the  State  of   California   and  its
municipalities,  authorities and other  instrumentalities that issue securities.
There have been a number of political  developments,  voter  initiatives,  state
constitutional amendments and legislation in California in recent years that may
affect the ability of the State  government  and  municipal  governments  to pay
interest and repay principal on the securities they have issued. In addition, in
recent years,  the State of California has derived a significant  portion of its
revenues from personal income and sales taxes. Because the amount collected from
these  taxes is  particularly  sensitive  to  economic  conditions,  the State's
revenues have been volatile.

      It is not  possible to predict the future  impact of the  legislation  and
economic considerations described below on the long-term ability of the State of
California or California municipal issuers to pay interest or repay principal on
their  obligations.  In part that is because of possible  inconsistencies in the
terms  of the  various  laws and  Propositions  and the  applicability  of other
statutes  to  these  issues.  The  budgets  of  California  counties  and  local
governments may be significantly affected by state budget decisions beyond their
control.  The information  below about these conditions is only a brief summary,
based upon  information  the Trust has drawn from  sources  that it believes are
reliable.

         |_|   Changes  to  the  State   Constitution.   Changes  to  the  state
constitution  in recent years have raised general  concerns about the ability of
the State and municipal  governments in California to obtain sufficient revenues
to pay their bond obligations.  In 1978,  California voters approved Proposition
13, an amendment to the state constitution.  The Proposition added a new section
to the constitution  that limits ad valorem taxes on real property and restricts
the ability of local taxing entities to increase real property  taxes.  However,
legislation  enacted after Proposition 13 provided help to California  municipal
issuers  to raise  revenue  to pay their  bond  obligations.  During  the severe
recession  California  experienced  from  1991 to 1993,  the  State  legislature
eliminated significant components of its aid to local governments. The State has
since increased aid to local  governments and reduced certain mandates for local
services.  Whether  legislation will be enacted in the future to either increase
or reduce the redistribution of State revenues to local governments,  or to make
them less  dependent on State budget  decisions,  cannot be  predicted.  Even if
legislation  increasing such  redistribution  is passed,  it cannot be predicted
whether in every instance it will provide sufficient revenue for local municipal
issuers to pay their bond obligations.

      Another  amendment  to the state  constitution  may also  have an  adverse
impact on state and municipal bond  obligations.  That  amendment  restricts the
state government from spending amounts in excess of appropriation limits imposed
on each state and local government  entity. If revenues exceed the appropriation
limit,  those  revenues  must be returned,  in the form of a revision in the tax
rates or fee schedules.

         |_| Voter  Initiatives.  California  voters  have  approved a number of
initiatives that affect the ability of the state and  municipalities  to finance
their bond  obligations.  In 1988,  California  voters approved  Proposition 98,
which  requires a minimum  level of funding  for public  schools  and  community
colleges.  In 1986,  voters  approved  Proposition  62,  which  had a number  of
effects. One requires that any special tax imposed by a local government must be
approved by a two-thirds vote of the electorate. In 1995, the California Supreme
Court upheld the constitutionality of that Proposition. That created uncertainty
as to the legality of certain local taxes enacted by non-charter  cities without
voter  approval.  It is not  possible  to predict  the  eventual  impact of that
decision.

      In 1996,  California  voters  approved  Proposition  218. That  initiative
applied the provisions of Proposition 62 to all government  entities,  including
cities  having  charters.  It requires  that all taxes for  general  purposes be
approved by a simple  majority of the popular  vote,  and that taxes for special
purposes must be approved by a two-thirds  majority vote.  Proposition  218 also
limits  the   authority  of  local   governments   to  impose   property-related
assessments,  fees and charges.  It requires that such assessments be limited to
the special benefit  conferred and prohibits their use for general  governmental
services.  The  Proposition  enables  voters to use their  initiative  powers to
reduce or repeal previously-authorized taxes, assessments, fees and charges.

         |_|  Effect  of  other  State  Laws  on Bond  Obligations.  Some of the
tax-exempt  securities  that the Trust can invest in may be obligations  payable
solely  from the  revenues  of a specific  institution  or  secured by  specific
properties.  These are  subject  to  provisions  of  California  law that  could
adversely affect the holders of such obligations.  For example,  the revenues of
California health care institutions may be adversely affected by State laws, and
California  law limits the remedies of a creditor  secured by a mortgage or deed
of trust on real  property.  Debt  obligations  payable  solely from revenues of
health  care  institutions  may also be  insured  by the State but no  guarantee
exists that adequate reserve funds will be appropriated by the State legislature
for such purpose.

         |_| The  Effect  of  General  Economic  Conditions  in the  State.  The
California  economy has been recovering from a general  economic  recession of a
few years ago. In 1997,  the rate of growth in new jobs has been  generally high
compared to the rest of the country.  The  unemployment  rate,  while relatively
higher than the national average,  fell to an average of 5.9% in 1998,  compared
to over 10% during the recessionary period. Many of the new jobs were created in
industries such as computer services,  software design, motion pictures and high
technology   manufacturing.   Business   services,   export   trade   and  other
manufacturing  also experienced  growth.  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 effects elsewhere, may continue to adversely affect
the State's  export-related  industries  and,  therefore,  the  State's  rate of
economic growth.

      On June 29, 1999, the Governor of California  signed the 1999-2000  Budget
Act. The Budget Act  estimated  General  Trust  revenues and  transfers of $63.0
billion, and contained  expenditures totaling $63.7 billion. The Budget Act also
contained expenditures of $16.1 billion from special funds and $1.5 billion from
bond funds.  The  Administration  estimated a budget reserve balance at June 30,
2000,  of  approximately  $881  million.  Not  included  in this  amount  was an
additional  $300 million which (after the Governor's  vetoes) was "set aside" to
provide funds for employee salary increases (to be negotiated in bargaining with
employee unions), and for litigation reserves. The Budget Act anticipates normal
cash flow borrowing during the fiscal year.  Continued State economic  expansion
and large  revenue  increases  enabled the  Governor  and State  legislature  to
provide increases in spending  programs in the 1999-2000 budget.  These included
large increases in education and health and human services funding.

      In recent past years the state has  experienced  reductions in the overall
credit ratings assigned to its General  Obligation bonds by several major rating
agencies. In July 1994, the ratings of those bonds were downgraded from Aa to A1
by Moody's,  from A+ to A by Standard & Poor's and from AA to A by Fitch. At the
time, the rating  agencies all cited  uncertainty  about the State's  ability to
balance  its budget by 1996.  In 1996,  noting  improvements  in the  economy in
California  and the state budget,  both Fitch and Standard & Poor's raised their
ratings  of the  State's  General  Obligation  bonds from A to A+, in 1997 Fitch
raised its rating to AA-, in 1998 Moody's  raised its rating to Aa3, and in 1999
Standard & Poor's raised its rating to AA-.

         |_|  Special  Financial  Problems  of  Local  Governments.  Some  local
governments in California have experienced  notable financial  difficulties.  On
December 6, 1994, Orange County, California,  became the largest municipality in
the United States ever to have filed for  protection  under  federal  bankruptcy
laws.  The filing  stemmed  from  losses of about $1.7  billion in the  County's
investment  pool due to  investments  in  high-risk  derivative  securities.  In
September 1995 the state legislature  approved legislation that permitted Orange
County to use for bankruptcy  recovery $820 million in sales taxes over 20 years
that were previously  earmarked for highways,  transit and development.  In June
1996 the County completed an $880 million bond offering secured by real property
owned by the County.  On June 12, 1996, the County emerged from  bankruptcy.  On
January 7, 1997,  Orange County  returned to the bond market with a $136 million
bond issue.  In December  1997,  Moody's  raised its ratings on $325  million of
Orange County pension  obligation bonds to Baa3 from Ba. In February 1998, Fitch
assigned  outstanding  Orange County pension  obligation bonds a BBB rating.  In
September  1999,   Moody's  assigned  the  County  an  issuer  (implied  general
obligation)  rating of Aa3 and, among other things,  upgraded the ratings on the
County's pension obligation bonds to A1.

      Los  Angeles  County,   the  nation's  most  populous  county,   has  also
experienced  financial  difficulties.   Between  1992  and  1995,  the  County's
long-term  bonds were  downgraded  three times.  This  occurred as a result of a
number of factors,  including severe operating  deficits for the county's health
care system. In addition, the County was affected by a long-term loss of revenue
caused by state  property  tax  shift  initiatives  in 1993  through  1995.  The
County's  improving  financial  condition has been reflected in improved general
obligation  bond  ratings.  In  June  1999,  the Los  Angeles  County  Board  of
Supervisors  approved a budget of  approximately  $15 billion for 1999-2000,  up
from the $13.6  billion  approved  for the previous  fiscal  year.  The County's
financial  condition  will continue to be affected by the large number of County
residents who are dependent on government  services and by a structural  deficit
in its health department.

Year 2000  Concerns.  In October  1997,  the  Governor of  California  issued an
executive order stating that solutions to the Year 2000 problem would be a state
government  priority.  Although the State reports that it is making  substantial
progress  overall  toward  the goal of Year  2000  compliance,  the task is very
complex and will likely  encounter  unexpected  difficulties.  The State has not
predicted  whether all mission  critical system will be ready and tested by late
1999 or what  impact  failure  of any  particular  IT  system(s)  or of  outside
interfaces  with State IT systems might have.  The State has indicated  that all
mission  critical  systems  will have a  contingency  business  plan in place to
mitigate potential system failures.

      The State  Treasurer's  Office  has  reported  that its  systems  for bond
payments are fully Y2K  compliant.  The State  Controller's  Office has reported
that it has  completed  the  necessary  Y2K  remediation  projects for the State
fiscal and accounting system. Both offices report they are actively working with
outside entities with which they interface to ensure they are also compliant.

      There  can be no  assurance  that  the  steps  taken  by  state  or  local
governments  or agencies to address the Year 2000 problem will be  sufficient to
avoid any adverse impact on their budgets or operations. Therefore, the possible
impact of Year 2000 problems on the debt securities  issued by those governments
and agencies,  and which may be owned by the Trust, cannot be predicted with any
certainty.

Other Investment Techniques and Strategies.  In seeking its objective,  the Fund
can from time to time use the types of  investment  strategies  and  investments
described  below. It is not required to use all of there strategies at all times
and at times may not use them.

      |X| Floating  Rate and Variable  Rate  Obligations.  Variable  rate demand
obligations  have a demand feature that allows the Fund to tender the obligation
to the issuer or a third party prior to its  maturity.  The tender may be at par
value plus accrued interest, according to the terms of the obligations.

      The  interest  rate on a floating  rate  demand  note is based on a stated
prevailing  market rate,  such as a bank's prime rate, the 91-day U.S.  Treasury
Bill rate, or some other standard,  and is adjusted automatically each time such
rate is adjusted. The interest rate on a variable rate demand note is also based
on a stated  prevailing  market rate but is adjusted  automatically at specified
intervals of not less than one year. Generally, the changes in the interest rate
on such  securities  reduce the  fluctuation in their market value.  As interest
rates  decrease  or  increase,   the  potential  for  capital   appreciation  or
depreciation is less than that for fixed-rate  obligations of the same maturity.
The Manager can determine that an unrated  floating rate or variable rate demand
obligation  meets the Fund's  quality  standards  by reason of being backed by a
letter  of credit  or  guarantee  issued  by a bank  that  meets  those  quality
standards.

      Floating rate and variable  rate demand notes that have a stated  maturity
in excess of one year may have  features  that  permit the holder to recover the
principal amount of the underlying security at specified intervals not exceeding
one year and upon no more than 30 days' notice.  The issuer of that type of note
normally has a corresponding  right in its discretion,  after a given period, to
prepay  the  outstanding  principal  amount of the note plus  accrued  interest.
Generally  the issuer  must  provide a specified  number of days'  notice to the
holder.

      |X| Inverse Floaters and Other Derivative Investments. The Fund can invest
in inverse  floaters to seek higher  tax-exempt  yields than are available  from
fixed-rate  bonds that have comparable  maturities and credit  ratings.  Inverse
floaters may offer relatively high current income, reflecting the spread between
short-term  and long-term tax exempt  interest  rates.  As long as the municipal
yield curve remains relatively steep and short term rates remain relatively low,
owners  of  inverse  floaters  will have the  opportunity  to earn  interest  at
above-market  rates because they receive  interest at the higher long-term rates
but have paid for bonds with lower short-term rates. If the yield curve flattens
and shifts  upward,  an inverse  floater  will lose  value more  quickly  than a
conventional long-term bond. In some cases, the holder of an inverse floater may
have an option to  convert  the  floater to a  fixed-rate  bond,  pursuant  to a
"rate-lock" option.

      Some inverse  floaters  have a feature  known as an interest rate "cap" as
part of the terms of the  investment.  Investing in inverse  floaters  that have
interest  rate caps might be part of a  portfolio  strategy to try to maintain a
high current  yield for the Fund when the Fund has invested in inverse  floaters
that  expose  the Fund to the risk of  short-term  interest  rate  fluctuations.
"Embedded"  caps can be used to hedge a portion of the Fund's exposure to rising
interest  rates.  When  interest  rates exceed a  pre-determined  rate,  the cap
generates additional cash flows that offset the decline in interest rates on the
inverse floater,  and the hedge is successful.  However, the Fund bears the risk
that if interest rates do not rise above the pre-determined rate, the cap (which
is purchased for  additional  cost) will not provide  additional  cash flows and
will expire worthless.

      Inverse floaters are a form of derivative investment. Certain derivatives,
such as options,  futures, indexed securities and entering into swap agreements,
can be used to  increase  the  Fund's  exposure  to  changing  security  prices,
interest  rates or other factors that affect the value of  securities.  However,
these  investments  could  result in losses to the Fund,  if the Manager  judges
market conditions incorrectly or employs a strategy that does not correlate well
with the Fund's other  investments.  These  investments  can cause losses if the
counterparty  does not perform its promises.  An additional risk of investing in
municipal securities that are derivative  investments is that their market value
could be expected  to vary to a much  greater  extent  than the market  value of
municipal securities that are not derivative investments but have similar credit
quality, redemption provisions and maturities.

      |X|  "When-Issued"  and  "Delayed-Delivery"  Transactions.  The  Fund  can
purchase  securities  on a  "when-issued"  basis,  and can purchase or sell such
securities on a "delayed-delivery" or "forward commitment" basis.  "When-issued"
or  "delayed-delivery"  refers  to  securities  whose  terms and  indenture  are
available  and for  which a market  exists,  but  which  are not  available  for
immediate  delivery.  The  Fund  does  not use this  technique  for  speculative
purposes.

      When  such  transactions  are  negotiated  the price  (which is  generally
expressed in yield terms) is fixed at the time the commitment is made.  Delivery
and  payment  for the  securities  take  place  at a later  date.  Normally  the
settlement  date is within six months of the  purchase  of  municipal  bonds and
notes.  However,  from time to time, the Fund can purchase municipal  securities
having a settlement  date more than six months and possibly as long as two years
or more after the trade date. The securities are subject to change in value from
market  fluctuation  during the settlement  period. The value at delivery may be
less than the  purchase  price.  For  example,  changes in  interest  rates in a
direction other than that expected by the Manager before  settlement will affect
the  value of such  securities  and might  cause a loss to the  Fund.  No income
begins to accrue to the Fund on a "when-issued" security until the Fund receives
the security at settlement of the trade.

      The Fund can engage in when-issued transactions in order to secure what is
considered  to be an  advantageous  price and yield at the time of entering into
the obligation.  When the Fund engages in  "when-issued"  or  "delayed-delivery"
transactions,  it relies on the buyer or seller, as the case may be, to complete
the transaction. Its failure to do so may cause the Fund to lose the opportunity
to obtain the security at a price and yield it considers advantageous.

      When  the   Fund   engages   in   "when-issued"   and   "delayed-delivery"
transactions,  it does so for the  purpose of  acquiring  or selling  securities
consistent  with its investment  objective and policies for its portfolio or for
delivery  pursuant to options  contracts  it has entered  into,  and not for the
purposes of investment  leverage.  Although the Fund  normally  would enter into
"when-issued" or delayed-delivery  purchase  transactions to acquire securities,
the Fund can dispose of a commitment prior to settlement. If the Fund chooses to
dispose  of  the  right  to  acquire  a  "when-issued"  security  prior  to  its
acquisition  or to dispose of its right to deliver or receive  against a forward
commitment, it might incur a gain or loss.

      At the time the Fund makes a commitment  to purchase or sell a security on
a "when-issued" or forward  commitment  basis, it records the transaction on its
books and reflects the value of the security  purchased.  In a sale transaction,
it records the proceeds to be received,  in determining its net asset value. The
Fund will identify to its custodian bank,  cash, U.S.  government  securities or
other  high-  grade debt  obligations  at least  equal to the value of  purchase
commitments until the Fund pays for the investment.

      "When-issued" transactions and forward commitments can be used by the Fund
as a defensive  technique to hedge against anticipated changes in interest rates
and  prices.  For  instance,  in periods of rising  interest  rates and  falling
prices,  the Fund might sell securities in its portfolio on a forward commitment
basis to attempt to limit its exposure to anticipated falling prices. In periods
of falling  interest  rates and  rising  prices,  the Fund might sell  portfolio
securities  and  purchase the same or similar  securities  on a  when-issued  or
forward commitment basis, to obtain the benefit of currently higher cash yields.

      |X|  Zero-Coupon  Securities.  The Fund can buy  zero-coupon  and  delayed
interest  municipal  securities.  Zero-coupon  securities  do not make  periodic
interest  payments and are sold at a deep  discount  from their face value.  The
buyer recognizes a rate of return determined by the gradual  appreciation of the
security,  which is redeemed at face value on a specified  maturity  date.  This
discount  depends on the time remaining  until  maturity,  as well as prevailing
interest  rates,  the  liquidity of the  security and the credit  quality of the
issuer.  In the absence of threats to the issuer's credit quality,  the discount
typically decreases as the maturity date approaches. Some zero-coupon securities
are convertible,  in that they are zero-coupon  securities until a predetermined
date, at which time they convert to a security with a specified coupon rate.

      Because zero-coupon  securities pay no interest and compound semi-annually
at the rate fixed at the time of their  issuance,  their value is generally more
volatile  than the value of other  debt  securities.  Their  value may fall more
dramatically than the value of  interest-bearing  securities when interest rates
rise. When prevailing interest rates fall,  zero-coupon  securities tend to rise
more rapidly in value because they have a fixed rate of return.

      The Fund's  investment  in  zero-coupon  securities  may cause the Fund to
recognize income and make  distributions to shareholders  before it receives any
cash payments on the zero-coupon  investment.  To generate cash to satisfy those
distribution  requirements,  the Fund may have to sell portfolio securities that
it  otherwise  might  have  continued  to hold or to use cash  flows  from other
sources such as the sale of Fund shares.

      |X| Puts and Standby  Commitments.  If the Fund buys a municipal  security
subject to a standby commitment to repurchase the security, the Fund is entitled
to same-day  settlement from the purchaser.  The Fund receives an exercise price
equal to the amortized cost of the underlying security plus any accrued interest
at the  time of  exercise.  A put  purchased  in  conjunction  with a  municipal
security  enables the Fund to sell the  underlying  security  within a specified
period of time at a fixed exercise price.

      The Fund might purchase a standby  commitment or put separately in cash or
it might  acquire the security  subject to the standby  commitment  or put (at a
price that reflects  that  additional  feature).  The Fund will enter into these
transactions  only with banks and  securities  dealers  that,  in the  Manager's
opinion,  present minimal credit risks.  The Fund's ability to exercise a put or
standby  commitment  will depend on the ability of the bank or dealer to pay for
the  securities if the put or standby  commitment  is exercised.  If the bank or
dealer should default on its  obligation,  the Fund might not be able to recover
all or a  portion  of any  loss  sustained  from  having  to sell  the  security
elsewhere.

      Puts and  standby  commitments  are not  transferable  by the  Fund.  They
terminate if the Fund sells the underlying  security to a third party.  The Fund
would enter into these arrangements to facilitate portfolio liquidity,  although
such  arrangements  might  enable the Fund to sell a security at a  pre-arranged
price that may be higher than the prevailing market price at the time the put or
standby commitment is exercised. However, the Fund might refrain from exercising
a put or standby  commitment if the exercise price is significantly  higher than
the prevailing  market price,  to avoid imposing a loss on the seller that could
jeopardize the Fund's business relationships with the seller.

      A put or standby commitment increases the cost of the security and reduces
the yield otherwise  available from the security.  Any consideration paid by the
Fund for the put or standby  commitment will be reflected on the Fund's books as
unrealized  depreciation  while the put or  standby  commitment  is held,  and a
realized  gain or loss  when the put or  commitment  is  exercised  or  expires.
Interest income received by the Fund from municipal  securities  subject to puts
or  stand-by  commitments  might not  qualify  as tax exempt in its hands if the
terms of the put or stand-by  commitment cause the Fund not to be treated as the
tax owner of the underlying municipal securities.

      |X|  Repurchase  Agreements.  The Fund can acquire  securities  subject to
repurchase  agreements.  It may do so for liquidity purposes to meet anticipated
redemptions of Fund shares, or pending the investment of the proceeds from sales
of Fund shares, or pending the settlement of portfolio securities transactions.

      In a  repurchase  transaction,  the Fund  acquires  a security  from,  and
simultaneously  resells it to an approved  vendor for delivery on an agreed upon
future  date.  The resale  price  exceeds the  purchase  price by an amount that
reflects an agreed-upon  interest rate effective for the period during which the
repurchase  agreement is in effect.  Approved  vendors  include U.S.  commercial
banks,  U.S.  branches  of  foreign  banks  or  broker-dealers  that  have  been
designated  a primary  dealer in  government  securities,  which meet the credit
requirements set by the Fund's Board of Directors from time to time.

      The majority of these  transactions run from day to day. Delivery pursuant
to  resale  typically  will  occur  within  one to five  days  of the  purchase.
Repurchase  agreements  having a maturity  beyond  seven days are subject to the
Fund's  limits  on  holding  illiquid  investments.  Because  income  earned  on
repurchase  transactions is not tax-exempt,  under normal market  conditions the
Fund will limit its  repurchase  transactions  to 20% of its total assets.  That
limit  may be  exceeded  if the Fund uses  repurchase  agreements  as  temporary
defensive investments.

      Repurchase  agreements,  considered  "loans" under the Investment  Company
Act,  are  collateralized  by the  underlying  security.  The Fund's  repurchase
agreements  require  that at all times  while  the  repurchase  agreement  is in
effect,  the  collateral's  value must equal or exceed the  repurchase  price to
fully  collateralize the repayment  obligation.  However, if the vendor fails to
pay the  resale  price on the  delivery  date,  the Fund  could  incur  costs in
disposing of the collateral  and may experience  losses if there is any delay in
its ability to do so. The Manager will monitor the vendor's  creditworthiness to
confirm that the vendor is financially sound and will  continuously  monitor the
collateral's value.

      |X| Illiquid  and  Restricted  Securities.  To enable the Fund to sell its
holdings of a restricted  security not  registered  under the  Securities Act of
1933,  the Fund might  have to cause  those  securities  to be  registered.  The
expenses of registering restricted securities may be negotiated by the Fund with
the issuer at the time the Fund buys the securities.  When the Fund must arrange
registration because the Fund wishes to sell the security, a considerable period
may elapse  between the time the  decision is made to sell the  security and the
time the security is


<PAGE>


registered  so that the Fund could sell it. The Fund would bear the risks of any
downward price fluctuation during that period.

      The Fund has percentage  limitations that apply to purchases of restricted
and  illiquid  securities,  as  stated  in  the  Prospectus.   Those  percentage
restrictions do not limit  purchases of restricted  securities that are eligible
for resale to qualified institutional purchasers pursuant to Rule 144A under the
Securities Act of 1933,  provided that those  securities have been determined to
be  liquid  by the  Board  of  Directors  of the Fund or by the  Manager.  Those
guidelines  take into account the trading  activity for such  securities and the
availability of reliable pricing information, among other factors. If there is a
lack of trading interest in a particular Rule 144A security,  the Fund's holding
of that security may be deemed to be illiquid.

      The  Fund  can  also  acquire   restricted   securities   through  private
placements.  Those  securities  have  contractual  restrictions  on their public
resale.  Those  restrictions  might  limit the Fund's  ability to dispose of the
securities and might lower the amount the Fund could realize upon the sale.

      |X|  Loans of  Portfolio  Securities.  The  Fund  can  lend its  portfolio
securities to brokers, dealers and other financial institutions.  The Fund might
do so to raise cash for liquidity purposes.  These loans are limited to not more
than 10% of the value of the Fund's net  assets.  There are risks in  connection
with  securities  lending.  The  Fund  might  experience  a delay  in  receiving
additional  collateral  to secure a loan,  or a delay in  recovery of the loaned
securities.  The Fund presently does not intend to engage in loans of securities
that  will  exceed 5% of the  value of the  Fund's  total  assets.  Income  from
securities loans does not constitute  exempt-interest  income for the purpose of
paying tax-exempt dividends.

      The Fund must receive  collateral  for a loan.  Under  current  applicable
regulatory  requirements (which are subject to change), on each business day the
loan collateral must be at least equal to the value of the loaned securities. It
must consist of cash, bank letters of credit,  securities of the U.S. government
or its agencies or  instrumentalities,  or other cash  equivalents  in which the
Fund is permitted to invest.  To be acceptable as collateral,  letters of credit
must obligate a bank to pay amounts demanded by the Fund if the demand meets the
terms of the letter. The terms of the letter of credit and the issuing bank both
must be satisfactory to the Fund.

      When it lends securities, the Fund receives amounts equal to the dividends
or  interest  on the  loaned  securities,  It also  receives  one or more of (a)
negotiated  loan fees, (b) interest on securities  used as  collateral,  and (c)
interest on  short-term  debt  securities  purchased  with the loan  collateral.
Either  type of  interest  may be  shared  with the  borrower.  The Fund can pay
reasonable  finder's,  administrative  or other  fees in  connection  with these
loans.  The terms of the  Fund's  loans  must meet  applicable  tests  under the
Internal Revenue Code and must permit the Fund to reacquire loaned securities on
five days' notice or in time to vote on any important matter.

      |X|  Borrowing.  The Fund can  borrow  up to 10% of the value of its total
assets. It can borrow only as a temporary measure for extraordinary or emergency
purposes.  The Fund cannot make any investment when borrowings  exceed 5% of its
total assets. The Fund can borrow only if it maintains a 300% ratio of assets to
borrowings at all times while a borrowing is  outstanding.  Interest on borrowed
money is an expense the Fund would not  otherwise  incur,  so that it might have
reduced net income during periods of substantial borrowings.

      |X|  Hedging.  The Fund can use  hedging to  attempt  to  protect  against
declines in the market value of the its portfolio,  to permit the Fund to retain
unrealized gains in the value of portfolio securities that have appreciated,  or
to facilitate  selling  securities  for  investment  reasons.  To do so the Fund
could:
      o sell interest rate futures or municipal bond index  futures,  o buy puts
      on such futures or  securities,  or o write covered  calls on  securities,
      interest rate futures or municipal bond
         index futures.  Covered calls can also be written on debt securities to
         attempt to increase  the Fund's  income,  but that income  would not be
         tax-exempt.  Therefore it is unlikely that the Fund would write covered
         calls for that purpose.

      The  Fund can  also  use  hedging  to  establish  a  position  in the debt
securities  market as a temporary  substitute  for  purchasing  individual  debt
securities.  In  that  case  the  Fund  would  normally  seek  to  purchase  the
securities,  and then terminate that hedging position. For this type of hedging,
the Fund could:
      o buy  interest  rate futures or municipal  bond index  futures,  or o buy
      calls on such futures or on securities.

      The Fund is not  obligated  to use hedging  instruments  even though it is
permitted  to use them in the  manager's  discretion,  as described  below.  The
Fund's  strategy  of  hedging  with  futures  and  options  on  futures  will be
incidental to the Fund's  investment  activities in the underlying  cash market.
The particular  hedging  instruments the Fund can use are described  below.  The
Fund can employ new hedging  instruments and strategies when they are developed,
if those investment methods are consistent with the Fund's investment  objective
and are permissible under applicable regulations governing the Fund.

         |_| Futures.  The Fund can buy and sell futures  contracts  relating to
debt  securities  (these are called  "interest rate futures") and municipal bond
indices (these are referred to as "municipal bond index futures").

      An interest rate future obligates the seller to deliver (and the purchaser
to  take)  cash or a  specific  type of debt  security  to  settle  the  futures
transaction.  Either party could also enter into an offsetting contract to close
out the futures position.

      A "municipal bond index" assigns relative values to the municipal bonds in
the index, and is used as the basis for trading long-term municipal bond futures
contracts.  Municipal  bond index  futures are similar to interest  rate futures
except that  settlement is made only in cash. The obligation  under the contract
may also be satisfied by entering into an offsetting  contract.  The  strategies
which the Fund  employs in using  municipal  bond index  futures  are similar to
those with regard to interest rate futures.



<PAGE>


      Upon  entering  into a futures  transaction,  the Fund will be required to
deposit an initial margin payment in cash or U.S. government securities with the
futures commission merchant (the "futures broker"). Initial margin payments will
be deposited  with the Fund's  custodian  bank in an account  registered  in the
futures  broker's  name.  However,  the  futures  broker can gain access to that
account  only under  certain  specified  conditions.  As the future is marked to
market (that is, its value on the Fund's books is changed) to reflect changes in
its market value,  subsequent margin payments,  called variation margin, will be
paid to or by the futures broker daily.

      At any time prior to the  expiration of the future,  the Fund can elect to
close out its  position  by taking an  opposite  position  at which time a final
determination  of variation margin is made and additional cash is required to be
paid by or released to the Fund.  Any gain or loss is then  realized by the Fund
on the future for tax  purposes.  Although  interest rate futures by their terms
call for  settlement  by the  delivery  of debt  securities,  in most  cases the
obligation  is fulfilled  without such  delivery by entering  into an offsetting
transaction.  All futures  transactions  are effected  through a clearing  house
associated with the exchange on which the contracts are traded.

      The Fund can  concurrently  buy and sell  futures  contracts in a strategy
anticipating  that the future the Fund  purchased  will perform  better than the
future the Fund sold. For example, the Fund might buy municipal bond futures and
concurrently  sell U.S.  Treasury Bond futures (a type of interest rate future).
The Fund would benefit if municipal bonds  outperform  U.S.  Treasury Bonds on a
duration-adjusted basis.

      Duration is a volatility  measure  that refers to the expected  percentage
change in the value of a bond resulting from a change in general  interest rates
(measured  by each 1%  change  in the rates on U.S.  Treasury  securities).  For
example,  if a bond has an effective  duration of three years,  a 1% increase in
general  interest  rates  would be  expected  to cause  the value of the bond to
decline about 3%. There are risks that this type of futures strategy will not be
successful.  U.S.  Treasury  bonds might perform  better on a  duration-adjusted
basis than municipal  bonds,  and the assumptions  about duration that were used
might be incorrect (in this case,  the duration of municipal  bonds  relative to
U.S. Treasury Bonds might have been greater than anticipated).

     |_| Put and Call  Options.  The Fund can buy and sell certain  kinds of put
options (puts) and call options (calls). These strategies are described below.

     |_| Writing  Covered Call Options.  The Fund can write (that is, sell) call
options. The Fund's call writing is subject to a number of restrictions:
(5)   After the Fund writes a call, not more than 25% of the Fund's total assets
               may be subject to calls.
(6)            Each  call  the  Fund  writes  must  be  "covered"  while  it  is
               outstanding. That means the Fund must own the investment on which
               the call was written.
(7)            The Fund can write calls on futures  contracts  that it owns, but
               these calls must be covered by  securities or other liquid assets
               that the Fund owns and  identifies  on the Fund's books to enable
               it to satisfy its obligations if the call is exercised.

      When the Fund writes a call on a security,  it receives  cash (a premium).
The  Fund  agrees  to  sell  the  underlying  investment  to  a  purchaser  of a
corresponding  call on the  same  security  during  the call  period  at a fixed
exercise price  regardless of market price changes  during the call period.  The
call period is usually not more than nine months.  The exercise price may differ
from the market price of the underlying security. The Fund has retained the risk
of loss that the price of the  underlying  security may decline  during the call
period. That risk may be offset to some extent by the premium the Fund receives.
If the value of the investment  does not rise above the call price, it is likely
that the call will lapse  without being  exercised.  In that case the Fund would
keep the cash premium and the investment.

      The Fund's  custodian  bank,  or a  securities  depository  acting for the
custodian  bank,  will act as the Fund's escrow agent through the  facilities of
the Options  Clearing  Corporation  ("OCC"),  as to the investments on which the
Fund has written calls traded on  exchanges,  or as to other  acceptable  escrow
securities.  In that way, no margin will be required for such transactions.  OCC
will release the  securities  on the  expiration of the calls or upon the Fund's
entering into a closing purchase transaction.

      When the Fund writes an  over-the-counter  ("OTC")  option,  it will enter
into an arrangement with a primary U.S. government  securities dealer which will
establish  a formula  price at which the Fund  will have the  absolute  right to
repurchase  that OTC option.  The formula  price would  generally  be based on a
multiple of the premium  received  for the option,  plus the amount by which the
option is exercisable  below the market price of the  underlying  security (that
is, the option is  "in-the-money").  When the Fund writes an OTC option, it will
treat as illiquid (for purposes of its  restriction on illiquid  securities) the
mark-to-market  value of any OTC option held by it, unless the option is subject
to a buy-back  agreement by the executing  broker.  The  Securities and Exchange
Commission  is  evaluating  whether  OTC  options  should be  considered  liquid
securities.  The procedure  described  above could be affected by the outcome of
that evaluation.

      To  terminate  its  obligation  on a call it has  written,  the  Fund  can
purchase a corresponding call in a "closing purchase transaction." The Fund will
then realize a profit or loss,  depending  upon whether the net of the amount of
the option transaction costs and the premium received on the call the Fund wrote
was more or less than the price of the call the Fund  purchased to close out the
transaction.  A profit  may also be  realized  if the call  lapses  unexercised,
because the Fund retains the underlying investment and the premium received. Any
such profits are considered  short-term  capital gains for federal tax purposes,
as are premiums on lapsed calls.  When  distributed by the Fund they are taxable
as ordinary income.

      The Fund can also write  calls on  futures  contracts  without  owning the
futures contract or securities  deliverable under the contract. To do so, at the
time the call is written,  the Fund must cover the call by identifying in escrow
an equivalent  dollar value of liquid assets on the Fund's books.  The Fund will
identify  additional  liquid  assets  on its  books  assets  if the value of the
escrowed assets drops below 100% of the current value of the future.  Because of
this escrow  requirement,  in no  circumstances  would the Fund's  receipt of an
exercise notice as to that future put the Fund in a "short" futures position.

|_|  Writing  Put  Options.  The  Fund can sell put  options.  A put  option  on
securities  gives the purchaser the right to sell, and the writer the obligation
to buy,  the  underlying  investment  at the  exercise  price  during the option
period.  The Fund  will not write  puts if,  as a  result,  more than 25% of the
Fund's  total  assets  would be  required  to be  segregated  to cover  such put
options.

      If the  Fund  writes a put,  the put  must be  covered  by  liquid  assets
identified on the Fund's books. The premium the Fund receives from writing a put
represents a profit, as long as the price of the underlying  investment  remains
equal to or above the exercise price of the put. However,  the Fund also assumes
the obligation  during the option period to buy the underlying  investment  from
the buyer of the put at the exercise price,  even if the value of the investment
falls  below  the  exercise  price.  If a  put  the  Fund  has  written  expires
unexercised,  the Fund  realizes  a gain in the amount of the  premium  less the
transaction costs incurred.  If the put is exercised,  the Fund must fulfill its
obligation to purchase the  underlying  investment at the exercise  price.  That
price will usually  exceed the market value of the  investment  at that time. In
that case, the Fund may incur a loss if it sells the underlying investment. That
loss will be equal to the sum of the sale price of the underlying investment and
the premium  received  minus the sum of the exercise  price and any  transaction
costs the Fund incurred.

      When writing a put option on a security,  to secure its  obligation to pay
for the underlying security the Fund will deposit in escrow liquid assets with a
value equal to or greater than the exercise price of the underlying  securities.
The Fund therefore forgoes the opportunity of investing the segregated assets or
writing calls against those assets.

      As long as the Fund's  obligation as the put writer  continues,  it may be
assigned an exercise notice by the broker-dealer through which the put was sold.
That notice will require the Fund to take  delivery of the  underlying  security
and pay the exercise price. The Fund has no control over when it may be required
to purchase the underlying security, since it may be assigned an exercise notice
at any time prior to the termination of its obligation as the writer of the put.
That obligation terminates upon expiration of the put. It may also terminate if,
before it receives  an  exercise  notice,  the Fund  effects a closing  purchase
transaction by purchasing a put of the same series as it sold. Once the Fund has
been  assigned  an  exercise  notice,   it  cannot  effect  a  closing  purchase
transaction.

      The Fund can decide to effect a closing purchase  transaction to realize a
profit on an outstanding  put option it has written or to prevent the underlying
security  from being put.  Effecting a closing  purchase  transaction  will also
permit  the Fund to write  another  put option on the  security,  or to sell the
security and use the proceeds from the sale for other investments. The Fund will
realize  a profit  or loss  from a closing  purchase  transaction  depending  on
whether the cost of the  transaction  is less or more than the premium  received
from  writing  the put option.  Any profits  from  writing  puts are  considered
short-term  capital gains for federal tax purposes,  and when distributed by the
Fund, are taxable as ordinary income.

         |_|  Purchasing  Calls  and  Puts.  The  Fund  can  buy  calls  only on
securities,  broadly-based municipal bond indices,  municipal bond index futures
and  interest  rate  futures.  It can also buy  calls to close out a call it has
written,  as discussed above. Calls the Fund buys must be listed on a securities
or commodities  exchange, or quoted on NASDAQ, or traded in the over-the-counter
market. The Fund can buy a call or put only if, after the purchase, the value of
all call and put options held by the Fund will not exceed 5% of the Fund's total
assets.

          When the Fund  purchases  a call  (other  than in a  closing  purchase
    transaction), it pays a premium. For calls on securities that the Fund buys,
    it has the  right  to buy  the  underlying  investment  from a  seller  of a
    corresponding  call on the same investment during the call period at a fixed
    exercise  price.  The Fund benefits only if (1) the call is sold at a profit
    or (2) the  call is  exercised  when  the  market  price  of the  underlying
    investment is above the sum of the exercise price plus the transaction costs
    and premium paid for the call.  If the call is not either  exercised or sold
    (whether or not at a profit),  it will become  worthless  at its  expiration
    date.  In that case the Fund will lose its premium  payment and the right to
    purchase the underlying investment.

      Calls on municipal bond indices,  interest rate futures and municipal bond
index  futures  are settled in cash rather  than by  delivering  the  underlying
investment.  Gain or loss depends on changes in the  securities  included in the
index in question  (and thus on price  movements in the debt  securities  market
generally) rather than on changes in price of the individual futures contract.

      The Fund can buy puts that relate to securities,  broadly-based  municipal
bond indices,  municipal bond index futures or interest rate futures (whether or
not the Fund owns the underlying investment in its portfolio).

      When the Fund  purchases a put,  it pays a premium.  The Fund then has the
right to sell the underlying  investment to a seller of a  corresponding  put on
the same  investment  during the put period at a fixed exercise  price.  Puts on
municipal  bond  indices are settled in cash.  Buying a put on a debt  security,
interest rate future or municipal  bond index future the Fund owns enables it to
protect  itself  during  the put  period  against a decline  in the value of the
underlying  investment  below the  exercise  price.  If the market  price of the
underlying  investment  is equal to or above the exercise  price and as a result
the put is not  exercised  or  resold,  the put  will  become  worthless  at its
expiration  date.  In that case the Fund will lose its  premium  payment and the
right to sell the underlying  investment.  A put may be sold prior to expiration
(whether or not at a profit).

         |_| Risks of  Hedging  with  Options  and  Futures.  The use of hedging
instruments requires special skills and knowledge of investment  techniques that
are  different  than what is required for normal  portfolio  management.  If the
Manager uses a hedging  instrument at the wrong time or judges market conditions
incorrectly, hedging strategies may reduce the Fund's returns.

      The Fund's option  activities  may affect its portfolio  turnover rate and
brokerage  commissions.  The exercise of calls written by the Fund may cause the
Fund to sell related  portfolio  securities,  thus increasing its turnover rate.
The exercise by the Fund of puts on securities will cause the sale of underlying
investments,  increasing  portfolio  turnover.  Although the decision whether to
exercise a put it holds is within the Fund's control,  holding a put might cause
the Fund to sell the related investments for reasons that would not exist in the
absence of the put.

      The Fund could pay a brokerage commission each time it buys a call or put,
sells a call, or buys or sells an underlying  investment in connection  with the
exercise of a call or put. Such commissions  could be higher on a relative basis
than  the  commissions   for  direct   purchases  or  sales  of  the  underlying
investments. Premiums paid for options are small in relation to the market value
of the underlying  investments.  Consequently,  put and call options offer large
amounts of leverage.  The leverage offered by trading in options could result in
the Fund's net asset value being more  sensitive  to changes in the value of the
underlying investment.

      If a covered call written by the Fund is exercised on an  investment  that
has increased in value,  the Fund will be required to sell the investment at the
call  price.  It will not be able to realize  any profit if the  investment  has
increased in value above the call price.

      There is a risk in using short  hedging by selling  interest  rate futures
and municipal bond index futures or purchasing puts on municipal bond indices or
futures  to  attempt  to  protect  against  declines  in the value of the Fund's
securities.  The risk is that the prices of such futures or the applicable index
will  correlate  imperfectly  with the  behavior  of the cash (that is,  market)
prices of the Fund's securities. It is possible for example, that while the Fund
has used hedging  instruments in a short hedge, the market might advance and the
value of debt  securities held in the Fund's  portfolio  might decline.  If that
occurred,  the  Fund  would  lose  money  on the  hedging  instruments  and also
experience a decline in value of its debt securities.  However, while this could
occur over a brief  period or to a very small  degree,  over time the value of a
diversified portfolio of debt securities will tend to move in the same direction
as the indices upon which the hedging instruments are based.

      The risk of  imperfect  correlation  increases as the  composition  of the
Fund's portfolio diverges from the securities  included in the applicable index.
To compensate  for the imperfect  correlation  of movements in the price of debt
securities  being hedged and movements in the price of the hedging  instruments,
the Fund might use  hedging  instruments  in a greater  dollar  amount  than the
dollar amount of debt securities being hedged.  It might do so if the historical
volatility of the prices of the debt securities being hedged is greater than the
historical volatility of the applicable index.

      The ordinary  spreads  between prices in the cash and futures  markets are
subject to distortions  due to differences in the natures of those markets.  All
participants   in  the  futures  markets  are  subject  to  margin  deposit  and
maintenance   requirements.   Rather  than  meeting  additional  margin  deposit
requirements,  investors  may close out  futures  contracts  through  offsetting
transactions  which could distort the normal  relationship  between the cash and
futures markets. From the point of view of speculators, the deposit requirements
in the  futures  markets  are  less  onerous  than  margin  requirements  in the
securities  markets.  Therefore,  increased  participation by speculators in the
futures markets may cause temporary price distortions.

      The Fund can use  hedging  instruments  to  establish  a  position  in the
municipal  securities  markets as a  temporary  substitute  for the  purchase of
individual  securities  (long  hedging).  It is possible  that the market  might
decline. If the Fund then concluded not to invest in such securities


<PAGE>


because of  concerns  that there  might be further  market  decline or for other
reasons, the Fund would realize a loss on the hedging instruments that would not
be offset by a reduction in the purchase price of the securities.

      An  option  position  may be  closed  out only on a market  that  provides
secondary  trading for options of the same series.  There is no assurance that a
liquid  secondary  market  will exist for a  particular  option.  The Fund could
experience  losses if it could not close out a position  because of an  illiquid
market for the future or option.

         |_| Interest Rate Swap Transactions. In an interest rate swap, the Fund
and another  party  exchange  their right to receive or their  obligation to pay
interest on a security. For example, they could swap a right to receive floating
rate  payments  for fixed rate  payments.  The Fund can enter into swaps only on
securities it owns.  The Fund may not enter into swaps with respect to more than
25% of its total assets. Also, the Fund will identify liquid assets on its books
(such as cash or U.S.  government  securities) to cover any amounts it could owe
under swaps that  exceed the  amounts it is  entitled  to  receive,  and it will
adjust that amount  daily,  as needed.  Income from  interest  rate swaps may be
taxable.

      Swap agreements entail both interest rate risk and credit risk. There is a
risk that, based on movements of interest rates in the future, the payments made
by the Fund under a swap agreement will have been greater than those received by
it. Credit risk arises from the possibility that the counterparty  will default.
If the  counterparty  to an interest  rate swap  defaults,  the Fund's loss will
consist of the net amount of contractual interest payments that the Fund has not
yet received. The Manager will monitor the creditworthiness of counterparties to
the Fund's interest rate swap transactions on an ongoing basis.

      The Fund can enter into swap transactions with appropriate  counterparties
pursuant to master netting agreements.  A master netting agreement provides that
all swaps done between the Fund and that counterparty under the master agreement
shall be regarded as parts of an integral agreement.  If on any date amounts are
payable under one or more swap transactions, the net amount payable on that date
shall be paid. In addition, the master netting agreement may provide that if one
party  defaults  generally or on one swap,  the  counterparty  can terminate the
swaps with that party.  Under master netting  agreements,  if there is a default
resulting  in a loss to one  party,  that  party's  damages  are  calculated  by
reference to the average cost of a  replacement  swap with respect to each swap.
The  gains  and  losses on all  swaps  are then  netted,  and the  result is the
counterparty's gain or loss on termination. The termination of all swaps and the
netting  of  gains  and  losses  on  termination  is  generally  referred  to as
"aggregation."

         |_| Regulatory Aspects of Hedging  Instruments.  When using futures and
options on futures,  the Fund is required to operate within  certain  guidelines
and restrictions  established by the Commodity  Futures Trading  Commission (the
"CFTC"). In particular,  the Fund is exempted from registration with the CFTC as
a "commodity  pool operator" if the Fund complies with the  requirements of Rule
4.5 adopted by the CFTC.  That Rule does not limit the  percentage of the Fund's
assets that may be used for futures  margin and related  options  premiums for a
bona fide  hedging  position.  However,  under the Rule the Fund must  limit its
aggregate initial futures margin and related options premiums to no more than 5%
of the Fund's net assets for hedging  strategies  that are not  considered  bona
fide hedging  strategies  under the Rule. Under the Rule, the Fund also must use
short  futures and  options on futures  positions  solely for bona fide  hedging
purposes  within the  meaning  and intent of the  applicable  provisions  of the
Commodity Exchange Act.

      Transactions in options by the Fund are subject to limitations established
by the option exchanges.  The exchanges limit the maximum number of options that
may be  written or held by a single  investor  or group of  investors  acting in
concert.  Those limits apply  regardless  of whether the options were written or
purchased  on the  same  or  different  exchanges,  or are  held  in one or more
accounts  or through  one or more  different  exchanges  or through  one or more
brokers.  Thus,  the  number of  options  that the Fund can write or hold may be
affected  by  options  written  or  held  by  other  entities,  including  other
investment  companies having the same advisor as the Fund (or an advisor that is
an affiliate of the Fund's  advisor).  The exchanges also impose position limits
on futures  transactions.  An exchange  may order the  liquidation  of positions
found to be in violation of those limits and may impose certain other sanctions.

      Under the Investment Company Act, when the Fund purchases an interest rate
future  or  municipal  bond  index  future,  it must  maintain  cash or  readily
marketable short-term debt instruments in an amount equal to the market value of
the investments underlying the future, less the margin deposit applicable to it.

     |X| Temporary Defensive Investments.  The securities the Fund can invest in
for temporary defensive purposes include the following:

      o  short-term municipal securities;
      o  obligations  issued or  guaranteed  by the U.S.  government  or its
         agencies or instrumentalities;
      o  short-term debt securities;
      o  repurchase agreements;
      o  commercial paper rated A-1 by Standard & Poor's, or a comparable rating
         by another nationally recognized rating agency;
      o  certificates of deposit of domestic banks with assets of $1 billion or
         more; and
      o  cash equivalents

      |X| Taxable Investments.  While the Fund can invest up to 20% of its total
assets in investments  that generate income subject to income taxes, it does not
anticipate  investing  substantial  amounts of its assets in taxable investments
under normal market  conditions or as part of its normal trading  strategies and
policies. To the extent it invests in taxable securities,  the Fund would not be
able to meet its objective of providing  tax exempt income to its  shareholders.
Taxable  investments  include,  for  example,  hedging  instruments,  repurchase
agreements,  and the  types of  securities  the  Fund  could  buy for  temporary
defensive purposes.

Investment Restrictions

      |X|  What Are  "Fundamental  Policies?"  Fundamental  policies  are  those
policies that the Fund has adopted to govern its investments that can be changed
only by the vote of a "majority" of the Fund's  outstanding  voting  securities.
Under the  Investment  Company Act, a "majority"  vote is defined as the vote of
the holders of the lesser of:
      o  67% or  more  of the  shares  present  or  represented  by  proxy  at a
         shareholder meeting, if the holders of more than 50% of the outstanding
         shares are present or represented by proxy, or
      o  more than 50% of the outstanding shares.

      The Fund's investment  objective is a fundamental  policy.  Other policies
described in the  Prospectus  or this  Statement of Additional  Information  are
"fundamental" only if they are identified as such. The Fund's Board of Directors
can change  non-fundamental  policies  without  shareholder  approval.  However,
significant  changes to investment  policies will be described in supplements or
updates to the  Prospectus  or this  Statement  of  Additional  Information,  as
appropriate.  The Fund's most significant  investment  policies are described in
the Prospectus.

      |X|   Does the Fund Have Additional Fundamental Policies?  The following
investment restrictions are fundamental policies of the Fund.

      o The Fund cannot lend money except in connection  with the acquisition of
debt securities which the Fund's investment  policies and restrictions permit it
to purchase.  The Fund can also make loans of portfolio  securities,  subject to
the restrictions stated under "Loans of Portfolio Securities."

      o The Fund cannot concentrate investments. That means it cannot invest 25%
or more of its total assets in any industry.  However, there is no limitation on
investments  in  municipal  securities,  obligations  issued  by  the  State  of
California or its subdivisions,  agencies, authorities or instrumentalities,  or
securities  issued or  guaranteed  by the U.S.  government  or its  agencies  or
instrumentalities.  The Fund cannot  invest in any other  securities  other than
municipal securities, temporary defensive investments and hedging instruments.

      o The  Fund  cannot  invest  in  interests  in oil or gas  exploration  or
development  programs or in commodities.  However, the Fund can buy and sell any
of the hedging instruments  permitted by any of its other policies.  It does not
matter if the hedging  instrument  is  considered to be a commodity or commodity
contract.

      o The Fund cannot  invest in real estate or in  interests  in real estate.
However,  the Fund can  purchase  securities  of issuers  holding real estate or
interests  in  real  estate  (including  securities  of real  estate  investment
trusts).

      o The Fund cannot  purchase  securities on margin.  However,  the Fund can
make margin  deposits  when using  hedging  instruments  permitted by any of its
other policies.

      o The Fund cannot invest in companies for the purpose of acquiring control
or management of those companies.

      o The Fund cannot  underwrite  securities of other companies.  A permitted
exception is in case it is deemed to be an underwriter  under the Securities Act
of 1933 when reselling any securities held in its own portfolio.

      o The Fund cannot  invest in or hold  securities of any issuer if officers
and directors of the Fund or the Manager individually beneficially own more than
1/2 of 1% of the  securities of that issuer and together own more than 5% of the
securities of that issuer.

      o The Fund cannot invest in other open-end investment  companies or invest
more than 5% of its net assets  through  open  market  purchases  in  closed-end
investment companies,  including small business investment  companies.  The Fund
cannot  make  any such  investment  at  commission  rates in  excess  of  normal
brokerage commissions.

      o The Fund cannot  pledge,  mortgage or  otherwise  encumber,  transfer or
assign any of its assets to secure a debt.  Collateral  arrangements for premium
and margin payments in connection with hedging  instruments are not deemed to be
a pledge of assets.

      o The Fund cannot issue  "senior  securities,"  but this does not prohibit
certain  investment  activities  for which assets of the Fund are  designated as
segregated,  or margin,  collateral or escrow  arrangements are established,  to
cover the related  obligations.  Examples of those activities  include borrowing
money,   reverse  repurchase   agreements,   delayed-delivery   and  when-issued
arrangements for portfolio securities transactions, and contracts to buy or sell
derivatives, hedging instruments, options or futures.

      Unless the Prospectus or this Statement of Additional  Information  states
that a percentage  restriction  applies on an ongoing basis,  it applies only at
the time the Fund makes an investment. The Fund need not sell securities to meet
the percentage limits if the value of the investment  increases in proportion to
the size of the Fund.

Non-Diversification of the Fund's Investments.  The Fund is "non-diversified" as
defined  in  the  Investment  Company  Act.  Funds  that  are  diversified  have
restrictions against investing too much of their assets in the securities of any
one  "issuer."  That means  that the Fund can  invest  more of its assets in the
securities of a single issuer than a fund that is diversified.

      Being  non-diversified  poses additional  investment risks, because if the
Fund  invests  more of its assets in fewer  issuers,  the value of its shares is
subject to greater  fluctuations  from adverse  conditions  affecting any one of
those issuers. However, the Fund does limit its investments in the securities of
any one issuer to qualify for tax purposes as a "regulated  investment  company"
under the Internal Revenue Code. By qualifying,  it does not have to pay federal
income taxes if more than 90% of its earnings are  distributed to  shareholders.
To qualify, the Fund must meet a number of conditions.  First, not more than 25%
of the market value of the Fund's total assets can be invested in the securities
of a single issuer. Second, with respect to 50% of the market value of its total
assets,  (1) not more than 5% of the  market  value of its total  assets  may be
invested in the  securities  of a single  issuer,  and (2) the Fund must not own
more than 10% of the outstanding voting securities of a single issuer.

      The  identification  of the issuer of a municipal  security depends on the
terms and conditions of the security. When the assets and revenues of an agency,
authority,  instrumentality  or other  political  subdivision  are separate from
those of the  government  creating  it and the  security  is backed  only by the
assets and revenues of the subdivision,  agency,  authority or  instrumentality,
the latter would be deemed to be the sole issuer.  Similarly,  if an  industrial
development   bond  is  backed   only  by  the  assets  and   revenues   of  the
non-governmental  user,  then that user  would be deemed to be the sole  issuer.
However,  if in  either  case  the  creating  government  or some  other  entity
guarantees a security, the guarantee would be considered a separate security and
would be treated as an issue of such government or other entity.

Applying the Restriction Against  Concentration.  To implement its policy not to
concentrate its investments,  the Fund has adopted the industry  classifications
set forth in  Appendix B to this  Statement  of  Additional  Information.  Those
industry classifications are not a fundamental policy.

      In implementing the Fund's policy not to concentrate its investments,  the
Manager  will  consider  a  non-governmental  user  of  facilities  financed  by
industrial  development  bonds as being in a particular  industry.  That is done
even  though  the bonds are  municipal  securities,  as to which the Fund has no
concentration  limitation.   Although  this  application  of  the  concentration
restriction  is not a  fundamental  policy of the Fund,  it will not be  changed
without shareholder approval.

                             How the Fund is Managed

Organization  and  History.  The Fund is one of two  investment  portfolios,  or
"series" of Oppenheimer Main Street Funds, Inc. That corporation is an open-end,
management  investment company organized as a Maryland  corporation in 1987. The
Fund is a non-diversified mutual fund and commenced operations on May 18, 1990.

      The Fund's parent  corporation is governed by a Board of Directors,  which
is responsible for protecting the interests of shareholders  under Maryland law.
The  Directors  meet  periodically  throughout  the year to  oversee  the Fund's
activities, review its performance, and review the actions of the Manager.

         |_| Classes of Shares.  The Board of Directors  has the power,  without
shareholder  approval,  to divide  unissued  shares of the Fund into two or more
classes.  The Board  has done so,  and the Fund  currently  has two  classes  of
shares:  Class A and  Class  B.  Both  classes  invest  in the  same  investment
portfolio. Each class of shares:
o     has its own dividends and distributions,
o     pays certain expenses which may be different for the different classes,
o     may have a different net asset value,
o     may have separate voting rights on matters in which interests of one class
            are  different  from  interests of another  class,  and o votes as a
class on matters that affect that class alone.

      Shares are freely transferable,  and each share of each class has one vote
at shareholder meetings, with fractional shares voting proportionally on matters
submitted  to the vote of  shareholders.  Each share of the Fund  represents  an
interest in the Fund  proportionately  equal to the interest of each other share
of the same class.

      The Directors  are  authorized to create new series and classes of shares.
The Directors may reclassify unissued shares of the Fund's parent corporation or
its series or classes into additional series or classes of shares. The Directors
also may divide or combine the shares of a class into a greater or lesser number
of  shares  without  changing  the  proportionate   beneficial   interest  of  a
shareholder  in the  Fund.  Shares  do not  have  cumulative  voting  rights  or
preemptive or subscription rights.  Shares may be voted in person or by proxy at
shareholder meetings.

         |_|  Meetings of  Shareholders.  Although  the Fund is not  required by
Maryland law to hold annual meetings, it may hold shareholder meetings from time
to time on important matters.  The shareholders of the Fund's parent corporation
have the right to call a meeting to remove a Director or to take  certain  other
action described in the Articles of Incorporation or under Maryland law.

      The Fund will  hold  meetings  when  required  to do so by the  Investment
Company  Act or other  applicable  law.  The Fund will  hold a meeting  when the
Directors call a meeting or upon proper request of  shareholders.  If the Fund's
parent corporation  receives a written request of the record holders of at least
25% of the  outstanding  shares  eligible  to be  voted at a  meeting  to call a
meeting for a specified purpose (which might include the removal of a Director),
the Directors will call a meeting of  shareholders  for that specified  purpose.
The Fund's parent  corporation  has undertaken that it will then either give the
applicants  access  to the  Fund's  shareholder  list  or mail  the  applicants'
communication to all other shareholders at the applicants' expense.

      Shareholders of the Fund and of its parent corporation's other series vote
together in the aggregate on certain matters at  shareholders'  meetings.  Those
matters include the election of Directors and ratification of appointment of the
independent  auditors.  Shareholders  of  a  particular  series  or  class  vote
separately  on  proposals  that affect that series or class.  Shareholders  of a
series or class that is not  affected by a proposal  are not entitled to vote on
the proposal.  For example, only shareholders of a particular series vote on any
material amendment to the investment  advisory  agreement for that series.  Only
shareholders of a particular class of a series vote on certain amendments to the
Distribution and/or Service Plans if the amendments affect only that class.

Directors  and  Officers  of  the  Fund.  The  Directors  of the  Fund's  parent
corporation and the Fund's officers and their principal occupations and business
affiliations during the past five years are listed below. Directors denoted with
an asterisk  (*) below are deemed to be  "interested  persons" of the Fund under
the Investment Company Act. All of the Directors are also trustees, directors or
managing general partners of the following Denver-based Oppenheimer funds8:


Oppenheimer Cash Reserves             Oppenheimer Senior Floating Rate Fund
Oppenheimer Champion Income Fund      Oppenheimer Strategic Income Fund
Oppenheimer Capital Income Fund       Oppenheimer Total Return Fund, Inc.
Oppenheimer High Yield Fund           Oppenheimer Variable Account Funds
Oppenheimer International Bond Fund   Panorama Series Fund, Inc.
Oppenheimer Integrity Funds           Centennial America Fund, L. P.
Oppenheimer Limited-Term Government
Fund                                  Centennial California Tax Exempt Trust
Oppenheimer Main Street Funds, Inc.   Centennial Government Trust
Oppenheimer Main Street Small Cap
Fund.                                 Centennial Money Market Trust
Oppenheimer Municipal Fund            Centennial New York Tax Exempt Trust
Oppenheimer Real Asset Fund           Centennial Tax Exempt Trust

      Ms. Macaskill and Messrs. Swain, Bishop, Wixted, Donohue, Farrar and Zack,
who are officers of the Fund,  respectively hold the same offices with the other
Denver-based  Oppenheimer  funds.  As of December 10, 1999,  the  Directors  and
officers of the Fund as a group owned less than 1% of the outstanding  shares of
the Fund.  The foregoing  statement does not reflect shares held of record by an
employee   benefit  plan  for   employees  of  the  Manager  other  than  shares
beneficially owned under that plan by the officers of the Fund listed below. Ms.
Macaskill and Mr. Donohue, are trustees of that plan.

8. Ms.  Macaskill  and Mr. Bowen are not  Trustees or  Directors of  Oppenheimer
Integrity Funds,  Oppenheimer  Strategic Income Fund, Panorama Series Fund, Inc.
or Oppenheimer Variable Account Funds. Mr. Fossel and Mr. Bowen are not Trustees
of  Centennial  New York  Tax  Exempt  Trust or  Managing  General  Partners  of
Centennial America Fund, L.P.

Robert G. Avis*, Director, Age: 68
One North Jefferson Ave., St. Louis, Missouri 63103
Chairman,  President and Chief Executive  Officer of A.G. Edwards Capital,  Inc.
(general partnership of private equity funds),  Director of A.G. Edwards & Sons,
Inc. (a  broker-dealer)  and Director of A.G.  Edwards  Trust  Companies  (trust
companies),  formerly,  Vice  Chairman  of A.G.  Edwards & Sons,  Inc.  and A.G.
Edwards,  Inc.  (its  parent  holding  company)  and  Chairman  of A.G.E.  Asset
Management (an investment advisor).

William A. Baker, Director, Age: 84
197 Desert Lakes Drive, Palm Springs, California 92264
Management Consultant.

George C. Bowen, Director, Age: 63
9224 Bauer Court, Lone Tree, Colorado 80124
Formerly (until April 1999) Mr. Bowen held the following positions:  Senior Vice
President  (since  September  1987)  and  Treasurer  (since  March  1985) of the
Manager;  Vice President  (since June 1983) and Treasurer  (since March 1985) of
the Distributor;  Vice President (since October 1989) and Treasurer (since April
1986) of HarbourView Asset Management Corporation;  Senior Vice President (since
February 1992),  Treasurer (since July 1991) Assistant  Secretary and a director
(since December 1991) of Centennial  Asset  Management  Corporation;  President,
Treasurer and a director of Centennial  Capital  Corporation  (since June 1989);
Vice  President  and Treasurer  (since  August 1978) and Secretary  (since April
1981) of Shareholder Services, Inc.; Vice President,  Treasurer and Secretary of
Shareholder Financial Services,  Inc. (since November 1989); Assistant Treasurer
of Oppenheimer  Acquisition Corp.  (since March 1998);  Treasurer of Oppenheimer
Partnership  Holdings,  Inc. (since November 1989); Vice President and Treasurer
of Oppenheimer Real Asset  Management,  Inc. (since July 1996);  Chief Executive
Officer,  Treasurer;   Treasurer  of  OppenheimerFunds  International  Ltd.  and
Oppenheimer Millennium Funds plc (since October 1997).


Jon S. Fossel, Director, Age: 57
P.O. Box 44, Mead Street, Waccabuc, New York 10597
Formerly  Chairman  and a director of the Manager,  President  and a director of
Oppenheimer  Acquisition  Corp.,  the  Manager's  parent  holding  company,  and
Shareholder Services,  Inc. and Shareholder  Financial Services,  Inc., transfer
agent subsidiaries of the Manager.

Sam Freedman, Director, Age: 59
4975 Lakeshore Drive, Littleton, Colorado 80123
Formerly  Chairman and Chief  Executive  Officer of  OppenheimerFunds  Services,
Chairman,  Chief Executive Officer and a director of Shareholder Services, Inc.,
Chairman,   Chief  Executive  Officer  and  director  of  Shareholder  Financial
Services, Inc., Vice President and director of Oppenheimer Acquisition Corp. and
a director of OppenheimerFunds, Inc.

Raymond J. Kalinowski, Director, Age: 70
44 Portland Drive, St. Louis, Missouri 63131
Director of Wave Technologies International, Inc. (a computer products training
company), self-employed consultant (securities matters).

C. Howard Kast, Director, Age: 78
2552 East Alameda, Denver, Colorado 80209
Formerly Managing Partner of Deloitte, Haskins & Sells (an accounting firm).

Robert M. Kirchner, Director, Age: 78
7500 E. Arapahoe Road, Englewood, Colorado 80112
President of The Kirchner Company (management consultants).

Bridget A. Macaskill*, President and Director, Age: 51
Two World Trade Center, New York, New York 10048-0203
President (since June 1991),  Chief Executive Officer (since September 1995) and
a Director (since  December 1994) of the Manager;  President and director (since
June 1991) of HarbourView Asset Management  Corporation,  an investment  advisor
subsidiary of the Manager; Chairman and a director of Shareholder Services, Inc.
(since August 1994) and Shareholder  Financial  Services,  Inc. (since September
1995),  transfer agent  subsidiaries of the Manager;  President (since September
1995) and a director (since October 1990) of Oppenheimer  Acquisition Corp., the
Manager's  parent  holding  company;  President  (since  September  1995)  and a
director  (since  November 1989) of Oppenheimer  Partnership  Holdings,  Inc., a
holding company  subsidiary of the Manager; a director of Oppenheimer Real Asset
Management,  Inc.  (since July 1996);  President and a director  (since  October
1997) of  OppenheimerFunds  International  Ltd.,  an  offshore  fund  management
subsidiary of the Manager and of Oppenheimer Millennium Funds plc; President and
a director of other Oppenheimer funds; a director of Prudential  Corporation plc
(a U.K. financial service company).

Ned M. Steel, Director, Age: 84
3416 South Race Street, Englewood, Colorado 80110
Chartered  Property  and  Casualty  Underwriter;  a director of  Visiting  Nurse
Corporation of Colorado.  James C. Swain*, Chairman, Chief Executive Officer and
Director, Age: 66 6803 South Tucson Way, Englewood, Colorado 80112 Vice Chairman
of the Manager  (since  September  1988);  formerly  President and a director of
Centennial Asset Management Corporation, an investment advisor subsidiary of the
Manager and Chairman of the Board of Shareholder Services, Inc.

Christian D. Smith,  Senior Vice  President and Portfolio  Manager,  Age: 37 Two
World Trade Center,  New York, New York 10048-0203  Senior Vice President of the
Manager (since October 11, 1999); an officer of other  Oppenheimer  funds.  From
January  1999  to  September  1999 he was  Co-Head  of the  Municipal  Portfolio
Management Team of Prudential  Global Asset Management (an investment  advisor),
prior to which he was a portfolio manager for that firm (January 1990 to January
1999).

Andrew J. Donohue, Vice President and Secretary, Age: 49
Two World Trade Center, New York, New York 10048-0203
Executive Vice President  (since January 1993),  General  Counsel (since October
1991) and a Director  (since  September  1995) of the  Manager;  Executive  Vice
President  and General  Counsel  (since  September  1993) and a director  (since
January 1992) of the Distributor;  Executive Vice President, General Counsel and
a director of HarbourView Asset Management  Corporation,  Shareholder  Services,
Inc.,   Shareholder   Financial  Services,   Inc.  and  (since  September  1995)
Oppenheimer  Partnership Holdings,  Inc.; President and a director of Centennial
Asset Management Corporation (since September 1995); President,  General Counsel
and a director of Oppenheimer  Real Asset  Management,  Inc.  (since July 1996);
General Counsel (since May 1996) and Secretary (since April 1997) of Oppenheimer
Acquisition   Corp.;   Vice   President  and  a  director  of   OppenheimerFunds
International Ltd. and Oppenheimer Millennium Funds plc (since October 1997); an
officer of other Oppenheimer funds.

Robert J. Bishop, Assistant Treasurer, Age: 40
6803 South Tucson Way, Englewood, Colorado 80112
Vice  President  of the  Manager/Mutual  Fund  Accounting  (since May 1996);  an
officer of other Oppenheimer funds;  formerly an Assistant Vice President of the
Manager/Mutual  Fund Accounting  (April 1994 - May 1996),  and a Fund Controller
for the Manager.

Scott T. Farrar, Assistant Treasurer, Age: 34
6803 South Tucson Way, Englewood, Colorado 80112
Vice President of the Manager/Mutual Fund Accounting (since May 1996); Assistant
Treasurer of Oppenheimer  Millennium  Funds plc (since October 1997); an officer
of  other  Oppenheimer  funds;  formerly  an  Assistant  Vice  President  of the
Manager/Mutual  Fund Accounting  (April 1994 - May 1996),  and a Fund Controller
for the Manager.

Brian W. Wixted, Treasurer, Age: 40
6803 South Tucson Way, Englewood, Colorado 80112
Senior Vice President and Treasurer (since April 1999) of the Manager; Treasurer
of  HarbourView  Asset  Management  Corporation,   Shareholder  Services,  Inc.,
Shareholder Financial Services,  Inc. and Oppenheimer Partnership Holdings, Inc.
(since April 1999); Assistant Treasurer of Oppenheimer  Acquisition Corp. (since
April 1999);  Assistant  Secretary of Centennial  Asset  Management  Corporation
(since April 1999);  formerly  Principal and Chief  Operating  Officer,  Bankers
Trust Company - Mutual Fund Services  Division  (March 1995 - March 1999);  Vice
President and Chief Financial Officer of CS First Boston  Investment  Management
Corp.  (September 1991 - March 1995); and Vice President and Accounting Manager,
Merrill Lynch Asset Management (November 1987 - September 1991).

Robert G. Zack, Assistant Secretary, Age: 51
Two World Trade Center, New York, New York 10048-0203
Senior Vice President (since May 1985) and Associate  General Counsel (since May
1981) of the Manager,  Assistant Secretary of Shareholder Services,  Inc. (since
May 1985),  and  Shareholder  Financial  Services,  Inc.  (since November 1989);
Assistant  Secretary of  OppenheimerFunds  International  Ltd.  and  Oppenheimer
Millennium  Funds plc (since  October  1997);  an  officer of other  Oppenheimer
funds.

      |X|  Remuneration  of  Directors.  The  officers  of the  Fund  and  three
Directors of the Fund (Ms. Macaskill and Messrs. Bowen and Swain) are affiliated
with the  Manager  and  receive  no salary or fee from the Fund.  The  remaining
Directors of the Fund received the  compensation  shown below.  The compensation
from the Fund was paid  during  its  fiscal  year ended  August  31,  1999.  The
compensation  from  all of  the  Denver-based  Oppenheimer  funds  includes  the
compensation from the Fund and represents  compensation  received as a director,
trustee,  managing  general partner or member of a committee of the Board during
the calendar year 1998.


<PAGE>





---------------------------------------------------------------------------
                                    Aggregate         Total Compensation
                                  Compensation      from all Denver-Based
Director's Name and Position        from Fund         Oppenheimer Funds1
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Robert G. Avis                        $248                 $67,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


William A. Baker                      $254                 $69,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


George C. Bowen2                       $43                   NONE
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Jon. S. Fossel
Review Committee Member               $252                 $67,496
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Sam Freedman
Review Committee Member               $270                 $73,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Raymond J. Kalinowski
Audit Committee Member                $267                 $73,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


C. Howard Kast
Audit and Review
Committee Chairman                    $286                 $76,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Robert M. Kirchner
Audit Committee Member                $251                 $67,998
---------------------------------------------------------------------------
---------------------------------------------------------------------------


Ned M. Steel                          $248                 $67,998
---------------------------------------------------------------------------
1.    For the 1998 calendar year.
2.    Mr. Bowen did not receive compensation during the 1998 calendar year as he
      was affiliated with the Manager during that period.

      |X|  Deferred  Compensation  Plan.  The Board of  Directors  has adopted a
Deferred  Compensation  Plan for  disinterested  directors  that enables them to
elect to defer  receipt of all or a portion of the annual fees they are entitled
to  receive  from the Fund.  Under  the plan,  the  compensation  deferred  by a
Director is periodically adjusted as though an equivalent amount had


<PAGE>


been  invested  in  shares  of one or more  Oppenheimer  funds  selected  by the
Director.  The amount  paid to the  Director  under the plan will be  determined
based upon the performance of the selected funds.

      Deferral of Director's fees under the plan will not materially  affect the
Fund's assets,  liabilities and net income per share. The plan will not obligate
the Fund to retain the services of any Director or to pay any  particular  level
of compensation  to any Director.  Pursuant to an Order issued by the Securities
and  Exchange  Commission,  the Fund may  invest  in the funds  selected  by the
Director under the plan without shareholder  approval for the limited purpose of
determining the value of the Director's deferred fee account.

      o Major  Shareholders.  As of  December  10, 1999 there are no persons who
owned of record or where known by the Fund to own beneficially 5% or more of any
class of the Fund's outstanding shares.

The Manager.  The Manager is wholly-owned by Oppenheimer Acquisition Corp., a
holding company controlled by Massachusetts Mutual Life Insurance Company.

|X|      Code of Ethics.  The Fund, the Manager and the Distributor  have a Code
         of Ethics.
It is  designed  to detect  and  prevent  improper  personal  trading by certain
employees,  including  portfolio  managers,  that  would  compete  with  or take
advantage of the Fund's portfolio transactions.  Covered persons include persons
with  knowledge of the  investments  and  investment  intentions of the Fund and
other funds  advised by the  Manager.  The Code of Ethics does permit  personnel
subject to the Code to invest in securities,  including  securities  that may be
purchased or held by the Fund, subject to a number of restrictions and controls.
Compliance  with the Code of Ethics is carefully  monitored  and enforced by the
Manager.

      |X| The Investment  Advisory  Agreement.  The Manager provides  investment
advisory  and  management  services  to the Fund  under an  investment  advisory
agreement  between the Manager and the Fund. The Manager selects  securities for
the Fund's portfolio and handles its day-to-day business.  The portfolio manager
of the Fund is  employed  by the  Manager  and is the person who is  principally
responsible for the day-to-day management of the Fund's portfolio. Other members
of the Manager's Fixed Income Portfolio Department provide the portfolio manager
with counsel and support in managing the Fund's portfolio.

      The agreement  requires the Manager,  at its expense,  to provide the Fund
with  adequate  office space,  facilities  and  equipment.  It also requires the
Manager to provide  and  supervise  the  activities  of all  administrative  and
clerical  personnel  required to provide effective  administration for the Fund.
Those  responsibilities  include the compilation and maintenance of records with
respect to its operations,  the preparation and filing of specified reports, and
composition of proxy materials and registration statements for continuous public
sale of shares of the Fund.

      The Fund pays  expenses  not  expressly  assumed by the Manager  under the
advisory  agreement.  The advisory  agreement lists examples of expenses paid by
the Fund. The major categories relate to interest, taxes, brokerage commissions,
fees to certain Directors, legal and


<PAGE>


audit  expenses,  custodian  bank and transfer  agent  expenses,  share issuance
costs,  certain  printing and  registration  costs and  non-recurring  expenses,
including litigation costs.

      Under the investment advisory  agreement,  the Manager is paid a fee based
on the average  annual net assets of the Fund. The rates at which the Manager is
paid depend on the amount of the Fund's average annual net assets:
      o When  net  assets  are  less  than  $25  million,  no fee is paid to the
      Manager.  o When net  assets  are $25  million  or more but less  than $50
      million, the
         rate of the fee is 0.15% of average annual net assets.
      o  When net assets are $50 million or more but less than $75 million, the
         rate of the fee is 0.25% of average annual net assets.
      o  When net assets are $75 million or more but less that $100 million, the
         rate of the is 0.40% of average annual net assets.
      o  When net assets are $100 million or more, the rate is 0.55% of average
         annual net assets.

      Apart from the investment advisory agreement,  the Manager has voluntarily
agreed to waive a portion  of its fee,  so that when the  Fund's  net assets are
$100 million or more,  the  Manager's  fee is paid at a rate of 0.40% of average
annual net assets.  The Manager can  terminate or amend that waiver at any time,
on notice to the Board of Directors. The management fees paid by the Fund to the
Manager are applied to the aggregate  assets of the Fund. The fees are allocated
to each class of shares  based upon the  relative  proportion  of the Fund's net
assets  represented by that class.  The management  fees paid by the Fund to the
Manager in the last three fiscal years are shown in the chart below.

--------------------------------------------------------------------------------
                                                    Management fees Paid to
  Fiscal Year ended    Management Fee (Without      OppenheimerFunds, Inc.
        8/31:             Voluntary Waiver)             (After Waiver)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
         1997                  $353,136                    $353,136
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
         1998                  $646,955                    $470,845
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
         1999                  $770,241                    $560,175
--------------------------------------------------------------------------------

      The investment  advisory  agreement  states that in the absence of willful
misfeasance,  bad faith,  gross  negligence in the  performance of its duties or
reckless  disregard of its obligations and duties under the investment  advisory
agreement,  the  Manager is not liable  for any loss the Fund  sustains  for any
investment,  adoption  of any  investment  policy,  or  the  purchase,  sale  or
retention of any security.

      The  agreement  permits the Manager to act as  investment  advisor for any
other person,  firm or corporation and to use the names  "Oppenheimer" and "Main
Street" in connection  with other  investment  companies for which it may act as
investment advisor or general distributor. If the Manager shall no longer act as
investment advisor to the Fund, the Manager may withdraw the right of the Fund's
parent  corporation to use the names  "Oppenheimer" and "Main Street" as part of
its name and the name of the Fund.

                         Brokerage Policies of the Fund

Brokerage Provisions of the Investment Advisory Agreement.  One of the duties of
the Manager under the investment advisory agreement is to buy and sell portfolio
securities for the Fund. The investment advisory agreement allows the Manager to
use  broker-dealers  to effect  the  Fund's  portfolio  transactions.  Under the
agreement,  the Manager may employ those broker-dealers,  including "affiliated"
brokers,  as that term is defined in the Investment Company Act. The Manager may
employ broker-dealers that the Manager thinks, in its best judgment based on all
relevant  factors,  will  implement the Fund's  policy to obtain,  at reasonable
expense, the "best execution" of portfolio transactions. "Best execution" refers
to prompt and reliable  execution at the most favorable  price  obtainable.  The
Manager need not seek competitive  commission bidding.  However,  the Manager is
expected to minimize  the  commissions  paid to the extent  consistent  with the
interest and policies of the Fund as established by its Board of Directors.

      Under the investment  advisory  agreement,  the Manager may select brokers
(other than affiliates) that provide  brokerage and/or research services for the
Fund and/or the other  accounts  over which the Manager or its  affiliates  have
investment  discretion.  The commissions paid to such brokers may be higher than
another  qualified  broker  would  charge,  if the  Manager  makes a good  faith
determination  that the  commission  is fair and  reasonable  in relation to the
services  provided.  Subject  to those  other  considerations,  as a  factor  in
selecting  brokers for the Fund's portfolio  transactions,  the Manager may also
consider sales of shares of the Fund and other investment  companies  managed by
the Manager or its affiliates.

Brokerage Practices Followed by the Manager. The Manager allocates brokerage for
the Fund subject to the provisions of the investment  advisory agreement and the
procedures and rules described above.  Generally the Manager's portfolio traders
allocate brokerage upon  recommendations  from the Manager's portfolio managers.
In certain instances,  portfolio managers may directly place trades and allocate
brokerage.  In either case,  the  Manager's  executive  officers  supervise  the
allocation of brokerage.

      Most securities  purchases made by the Fund are principal  transactions at
net prices.  The Fund  usually  deals  directly  with the selling or  purchasing
principal or market maker without incurring charges for the services of a broker
on its behalf unless the Manager determines that a better price or execution may
be obtained  by using the  services  of a broker.  Therefore,  the Fund does not
incur  substantial   brokerage  costs.   Portfolio   securities  purchased  from
underwriters  include  a  commission  or  concession  paid by the  issuer to the
underwriter in the price of the security.  Portfolio  securities  purchased from
dealers  include a spread  between  the bid and asked  price.  The Fund seeks to
obtain prompt execution of orders at the most favorable net prices. In an option
transaction,  the Fund  ordinarily uses the same broker for the purchase or sale
of the option and any transaction in the investment to which the option relates.

      Other funds advised by the Manager have investment objectives and policies
similar to those of the Fund.  Those other  funds may  purchase or sell the same
securities  as the Fund at the same time as the Fund,  which  could  affect  the
supply  and  price of the  securities.  If two or more of funds  advised  by the
Manager  purchase the same  security on the same day from the same  dealer,  the
transactions  under those combined orders are averaged as to price and allocated
in accordance with the purchase or sale orders actually placed for each account.
      The  investment   advisory  agreement  permits  the  Manager  to  allocate
brokerage for research services.  The research services provided by a particular
broker may be useful only to one or more of the advisory accounts of the Manager
and  its  affiliates.  Investment  research  received  by the  Manager  for  the
commissions  paid by those other accounts may be useful both to the Fund and one
or more of the Manager's other  accounts.  Investment  research  services may be
supplied  to the Manager by a third  party at the  instance of a broker  through
which trades are placed.  Investment  research services include  information and
analyses on particular  companies  and  industries as well as market or economic
trends and portfolio  strategy,  market  quotations  for portfolio  evaluations,
information systems,  computer hardware and similar products and services.  If a
research  service also assists the Manager in a  non-research  capacity (such as
bookkeeping  or other  administrative  functions),  then only the  percentage or
component   that  provides   assistance   to  the  Manager  in  the   investment
decision-making process may be paid in commission dollars.

      The Board of Directors  has permitted  the Manager to use  concessions  on
fixed-price offerings to obtain research, in the same manner as is permitted for
agency  transactions.  The Board has also  permitted  the  Manager to use stated
commissions on secondary  fixed-income  agency trades to obtain  research if the
broker  represents  to the  Manager  that:  (i) the trade is not from or for the
broker's own  inventory,  (ii) the trade was executed by the broker on an agency
basis at the stated commission,  and (iii) the trade is not a riskless principal
transaction.

      The research services provided by brokers broaden the scope and supplement
the research activities of the Manager.  That research provides additional views
and  comparisons  for  consideration  and helps  the  Manager  to obtain  market
information  for the valuation of securities  that are either held in the Fund's
portfolio or are being considered for purchase. The Manager provides information
to the  Board of the Fund  about  the  commissions  paid to  brokers  furnishing
research services, together with the Manager's representation that the amount of
such  commissions  was  reasonably  related  to the  value  or  benefit  of such
services.

                         Distribution and Service Plans

The  Distributor.  Under its  General  Distributor's  Agreement  with the Fund's
parent corporation,  the Distributor acts as the Fund's principal underwriter in
the  continuous  public  offering of the Fund's shares.  The  Distributor is not
obligated to sell a specific number of shares. Expenses normally attributable to
sales are borne by the Distributor.

      The compensation paid to (or retained by) the Distributor from the sale of
shares or on the redemption of shares during the Fund's three most recent fiscal
years is shown in the table below.



<PAGE>




------------------------------------------------------------------------------
             Aggregate       Class A
             Front-End       Front-End       Commissions on  Commissions on
             Sales Charges   Sales Charges   Class A Shares  Class B Shares
Fiscal Year  on Class A      Retained by     Advanced by     Advanced by
Ended 8/31:  Shares          Distributor     Distributor1    Distributor1
------------------------------------------------------------------------------
------------------------------------------------------------------------------
    1997        $293,130         $46,207           N/A           $213,863
------------------------------------------------------------------------------
------------------------------------------------------------------------------
    1998        $406,963         $41,120         $71,099         $465,076
------------------------------------------------------------------------------
------------------------------------------------------------------------------
    1999        $370,004         $65,422         $27,796         $426,112
------------------------------------------------------------------------------
1. The Distributor  advances commission payments to dealers for certain sales of
   Class A shares and for sales of Class B shares from its own  resources at the
   time of sale.


------------------------------------------------------------------------------
                          Class A Contingent       Class B Contingent
                          Deferred Sales Charges   Deferred Sales Charges
Fiscal Year Ended 8/31    Retained by Distributor  Retained by Distributor
------------------------------------------------------------------------------
------------------------------------------------------------------------------
          1999                     $4,038                   $95,508
------------------------------------------------------------------------------

      For  additional  information  about  distribution  of the  Fund's  shares,
including fees and expenses,  please refer to "Distribution  and Service Plans,"
below.

Distribution  and Service Plan. The Fund has adopted a Distribution  and Service
Plan for Class B shares Rule 12b-1 of the Investment Company Act. Under the plan
the Fund  reimburses the  Distributor for all or a portion of its costs incurred
in connection with the distribution and/or servicing of Class B shares.

      The plan has been approved by a vote of the Board of Directors,  including
a majority of the Independent Directors9, cast in person at a meeting called for
the purpose of voting on that plan. The  shareholder  vote for the  Distribution
and Service Plans for Class B shares was cast by the Manager as the sole initial
holder of Class B shares of the Fund.

9. In  accordance  with  Rule  12b-1 of the  Investment  Company  Act,  the term
"Independent  Directors" in this Statement of Additional  Information  refers to
those  Directors  who are not  "interested  persons"  of the Fund (or its parent
corporation)  and who do not have any direct or indirect  financial  interest in
the operation of the distribution plan or any agreement under the plan.


      Under the plans,  the Manager  and the  Distributor  may make  payments to
affiliates and, in their sole  discretion,  from time to time, may use their own
resources (at no direct cost to the Fund) to make  payments to brokers,  dealers
or other financial  institutions for distribution  and  administrative  services
they perform.  The Manager may use its profits from the advisory fee it receives
from the Fund. In their sole  discretion,  the  Distributor  and the Manager may
increase or decrease the amount of payments  they make from their own  resources
to plan recipients.

      Unless the plan is terminated as described  below,  the plan  continues in
effect  from  year to year but only if the  Fund's  Board of  Directors  and its
Independent  Directors  specifically  vote annually to approve its  continuance.
Approval must be by a vote cast in person at a meeting called for the purpose of
voting on  continuing  the plan.  The plan may be  terminated at any time by the
vote of a majority of the Independent Directors or by the vote of the holders of
a "majority" (as defined in the Investment Company Act) of the outstanding Class
B shares.

      The Board of  Directors  and the  Independent  Directors  must approve all
material  amendments to the plan. An amendment to increase materially the amount
of payments to be made under the plan must be approved by  shareholders of Class
B.

      While the plan is in  effect,  the  Treasurer  of the Fund  shall  provide
written reports on the plan to the Board of Directors at least quarterly for its
review.  The Reports shall detail the amount of all payments made under the plan
and the purpose for which the payments  were made.  Those reports are subject to
the review and approval of the Independent Directors.

      The plan states that while it is in effect,  the selection and  nomination
of those  Directors of the Fund's  parent  corporation  who are not  "interested
persons" of the  corporation (or the Fund) is committed to the discretion of the
Independent  Directors.  This does not prevent the  involvement of others in the
selection and  nomination  process as long as the final decision as to selection
or nomination is approved by a majority of the Independent Directors.

      Under the plan, no payment will be made to any recipient in any quarter in
which the aggregate net asset value of all Fund shares held by the recipient for
itself and its customers does not exceed a minimum  amount,  if any, that may be
set from time to time by a majority of the Independent  Directors.  The Board of
Directors has set no minimum  amount of assets to qualify for payments under the
plan.

         |_| Class B Service and Distribution Plan Fees. Under the plan, service
fees and distribution fees are computed on the average of the net asset value of
Class B shares,  determined as of the close of each regular  business day during
the period.  The plan allows the  Distributor  to be reimbursed for its services
and costs in distributing Class B shares and servicing accounts.

          Under the service plan,  the services  provided by recipients to their
    customers  include,  among others,  answering  customer  inquiries about the
    Fund, assisting in establishing and maintaining accounts in the Fund, making
    the Fund's  investment  plans  available and providing other services at the
    request  of  the  Fund  or  the   Distributor.   The  service  plan  permits
    reimbursements to the Distributor at a rate of up to 0.25% of average annual
    net asset of Class B. The Board has set the rate at that level.

      The plan  permits the  Distributor  to retain both the  asset-based  sales
charges and the service fees or to pay recipients the service fee on a quarterly
basis, without payment in advance. However, the Distributor currently intends to
pay the service fee to recipients in advance for the first year after the shares
are  purchased.  After the first year shares are  outstanding,  the  Distributor
makes  service fee payments  quarterly on those shares.  The advance  payment is
based on the net asset value of shares sold. Shares purchased by exchange do not
qualify for the service fee payment.  If Class B shares are redeemed  during the
first year after their  purchase,  the  recipient  of the service  fees on those
shares will be  obligated  to repay the  Distributor  a pro rata  portion of the
advance payment of the service fee made on those shares.

      The Distributor retains the asset-based sales charge on Class B shares. If
a dealer has a special agreement with the Distributor,  the Distributor will pay
the Class B service fee and the asset-based sales charge to the dealer quarterly
in lieu of paying the sales  commissions  and service fee in advance at the time
of purchase.

      The  asset-based  sales  charges on Class B shares allow  investors to buy
shares  without a front-end  sales charge  while  allowing  the  Distributor  to
reimburse  dealers that sell those shares.  The Fund pays the asset-based  sales
charges to the  Distributor for its services  rendered in  distributing  Class B
shares.  The  payments  are  made to the  Distributor  in  recognition  that the
Distributor:
      o  pays sales commissions to authorized brokers and dealers at the time of
         sale and pays service fees as described above,
      o  may  finance  payment of sales  commissions  and/or the  advance of the
         service fee payment to recipients  under the plans, or may provide such
         financing from its own resources or from the resources of an affiliate,
      o employs personnel to support distribution of Class B shares, and o bears
      the costs of sales literature, advertising and prospectuses (other
         than those  furnished  to current  shareholders)  and state  "blue sky"
         registration fees and certain other distribution expenses.

      The  Distributor's  actual  expenses in selling Class B shares may be more
than the  payments  it  receives  from the  contingent  deferred  sales  charges
collected on redeemed  shares and from the Fund under the plans.  If the Class B
plan is  terminated  by the Fund,  the Board of Directors  may allow the Fund to
continue  payments  of the  asset-based  sales  charge  to the  Distributor  for
distributing shares before the plan was terminated. All payments under the Class
B plan is subject to the limitation imposed by the Conduct Rules of the National
Association of Securities Dealers, Inc. on payments of asset-based sales charges
and service fees.

--------------------------------------------------------------------------------
      Distribution Fees Paid to the Distributor for the Year Ended 8/31/99
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                                   Distributor's
                                            Distributor's       Unreimbursed
              Total          Amount         Aggregate           Expenses as %
              Payments       Retained by    Unreimbursed        of Net Assets
Class:        Under Plan     Distributor    Expenses Under Plan of Class
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B Plan     $280,483       $238,366        $1,067,326           3.59%
--------------------------------------------------------------------------------
1.    Includes $1 paid to an affiliate of the Distributor's parent company.

      All payments under the Class B plan are subject to the limitations imposed
by the Conduct Rules of the National Association of Securities Dealers,  Inc. on
payments of asset-based sales charges and service fees.

                             Performance of the Fund

Explanation  of  Performance  Terminology.  The Fund uses a variety  of terms to
illustrate  its   performance.   These  terms  include   "standardized   yield,"
"tax-equivalent   yield,"  "dividend  yield,"  "average  annual  total  return,"
"cumulative  total return," "average annual total return at net asset value" and
"total  return at net asset  value."  An  explanation  of how  yields  and total
returns are  calculated  is set forth  below.  The charts  below show the Fund's
performance as of the Fund's most recent fiscal year end. You can obtain current
performance  information by calling the Fund's Transfer Agent at  1-800-525-7048
or    by    visiting    the    OppenheimerFunds    Internet    web    site    at
www.oppenheimerfunds.com.

      The Fund's  illustrations of its performance data in  advertisements  must
comply  with  rules of the  Securities  and  Exchange  Commission.  Those  rules
describe  the  types of  performance  data  that may be used and how it is to be
calculated.  In general,  any  advertisement by the Fund of its performance data
must include the average annual total returns for the advertised class of shares
of the Fund. Those returns must be shown for the 1-5 and 10-year periods (or the
life of the  class,  if less)  ending  as of the most  recently  ended  calendar
quarter prior to the  publication  of the  advertisement  (or its submission for
publication).  Certain types of yields may also be shown, provided that they are
accompanied by standardized average annual total returns.

      Use of  standardized  performance  calculations  enables  an  investor  to
compare the Fund's  performance  to the  performance of other funds for the same
periods.  However,  a number of factors  should be  considered  before using the
Fund's performance information as a basis for comparison with other investments:
      o Yields and total  returns  measure  the  performance  of a  hypothetical
account in the Fund over various periods and do not show the performance of each
shareholder's  account.  Your  account's  performance  will  vary from the model
performance  data if your  dividends  are  received in cash,  or you buy or sell
shares  during the period,  or you bought  your  shares at a different  time and
price than the shares used in the model.
      o An  investment  in the  Fund is not  insured  by the  FDIC or any  other
government agency.
      o The  principal  value of the  Fund's  shares,  and its  yields and total
returns are not guaranteed and normally will fluctuate on a daily basis.
      o When an investor's  shares are redeemed,  they may be worth more or less
than their original cost.
      o Yields and total returns for any given past period represent  historical
performance information and are not, and should not be considered,  a prediction
of future yields or returns.

      The performance of each class of shares is shown  separately,  because the
performance  of each class of shares will usually be different.  That is because
of the  different  kinds of  expenses  each  class  bears.  The yields and total
returns of each class of shares of the Fund are  affected by market  conditions,
the quality of the Fund's  investments,  the maturity of those investments,  the
types of  investments  the  Fund  holds,  and its  operating  expenses  that are
allocated to the particular class.

      |X| Yields.  The Fund uses a variety of different yields to illustrate its
current returns. Each class of shares calculates its yield separately because of
the different expenses that affect each class.

         |_| Standardized Yield. The "standardized yield" (sometimes referred to
just as "yield") is shown for a class of shares for a stated 30-day  period.  It
is not based on actual  distributions  paid by the Fund to  shareholders  in the
30-day period,  but is a hypothetical yield based upon the net investment income
from the Fund's portfolio  investments for that period.  It may therefore differ
from the "dividend yield" for the same class of shares, described below.



<PAGE>


      Standardized  yield is calculated using the following formula set forth in
rules  adopted by the  Securities  and Exchange  Commission,  designed to assure
uniformity in the way that all funds calculate their yields:

                                    (a-b)    6
            Standardized Yield = 2 ((--- + 1)  - 1)
                                    ( cd)


      The symbols above represent the following factors:
      a =  dividends and interest earned during the 30-day period.
      b =  expenses accrued for the period (net of any expense assumptions).
      c = the  average  daily  number of shares  of that  class  outstanding
          during the 30-day period that were entitled to receive dividends.
      d = the maximum offering price per share of that class on the last day
          of the period, adjusted for undistributed net investment income.

      The standardized  yield for a particular 30-day period may differ from the
yield for other periods. The SEC formula assumes that the standardized yield for
a 30-day  period  occurs  at a  constant  rate  for a  six-month  period  and is
annualized at the end of the six-month period. Additionally,  because each class
of shares is subject to different  expenses,  it is likely that the standardized
yields of the Fund's classes of shares will differ for any 30-day period.

         |_|  Dividend  Yield.  The Fund may quote a  "dividend  yield" for each
class of its shares. Dividend yield is based on the dividends paid on a class of
shares during the actual  dividend  period.  To calculate  dividend  yield,  the
dividends of a class declared during a stated period are added together, and the
sum is  multiplied  by 12 (to  annualize  the yield) and  divided by the maximum
offering  price on the last day of the  dividend  period.  The  formula is shown
below:

Dividend Yield = dividends paid x 12/maximum offering price (payment date)

      The maximum offering price for Class A shares includes the current maximum
initial sales charge.  The maximum  offering price for Class B shares is the net
asset value per share,  without  considering  the effect of contingent  deferred
sales charges.  The Class A dividend yield may also be quoted without  deducting
the maximum initial sales charge.

         |_|  Tax-Equivalent  Yield.  The  "tax-equivalent  yield" of a class of
shares  is the  equivalent  yield  that  would  have to be  earned  on a taxable
investment  to  achieve  the  after-tax   results   represented  by  the  Fund's
tax-equivalent  yield. It adjusts the Fund's  standardized  yield, as calculated
above, by a stated federal tax rate. Using different tax rates to show different
tax  equivalent  yields  shows  investors  in  different  tax  brackets  the tax
equivalent yield of the Fund based on their own tax bracket.

      The  tax-equivalent  yield is based on a 30-day period, and is computed by
dividing  the  tax-exempt  portion of the Fund's  current  yield (as  calculated
above) by one minus a stated income tax rate. The result is added to the portion
(if any) of the Fund's current yield that is not tax-exempt.



<PAGE>


      The tax-equivalent  yield may be used to compare the tax effects of income
derived  from the Fund with income  from  taxable  investments  at the tax rates
stated.  Your tax bracket is determined by your federal and state taxable income
(the net amount  subject to federal and state  income tax after  deductions  and
exemptions).  The tax-equivalent  yield table assumes that the investor is taxed
at  the  highest  bracket,   regardless  of  whether  a  switch  to  non-taxable
investments would cause a lower bracket to apply.

--------------------------------------------------------------------------------
            The Fund's Yields for the 30-Day Periods Ended 8/31/99
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                           Tax-Equivalent Yield
Class of                                                     (45.22% Combined
Shares                                                      Federal/California
               Standardized Yield      Dividend Yield          Tax Bracket)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
             Without    After       Without    After      Without     After
             Sales      Sales       Sales      Sales      Sales       Sales
             Charge     Charge      Charge     Charge     Charge      Charge
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A        5.26%       5.01%      5.26%      5.01%       9.60%      9.15%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B        4.25%        N/A       4.25%       N/A        7.76%       N/A
--------------------------------------------------------------------------------

      |X| Total Return Information. There are different types of "total returns"
to measure  the  Fund's  performance.  Total  return is the change in value of a
hypothetical  investment  in the Fund  over a given  period,  assuming  that all
dividends and capital gains  distributions  are reinvested in additional  shares
and that  the  investment  is  redeemed  at the end of the  period.  Because  of
differences  in expenses  for each class of shares,  the total  returns for each
class are separately  measured.  The cumulative total return measures the change
in value over the entire  period (for  example,  ten years).  An average  annual
total  return  shows the  average  rate of return for each year in a period that
would  produce the  cumulative  total  return over the entire  period.  However,
average annual total returns do not show actual  year-by-year  performance.  The
Fund uses  standardized  calculations for its total returns as prescribed by the
SEC. The methodology is discussed below.

         In calculating  total returns for Class A shares,  the current  maximum
sales charge of 4.75% (as a percentage  of the offering  price) is deducted from
the initial  investment  ("P") (unless the return is shown without sales charge,
as described below).  For Class B shares,  payment of the applicable  contingent
deferred  sales charge is applied,  depending on the period for which the return
is shown: 5.0% in the first year, 4.0% in the second year, 3.0% in the third and
fourth  years,  2.0%  in the  fifth  year,  1.0%  in the  sixth  year  and  none
thereafter.

         |_| Average Annual Total Return.  The "average  annual total return" of
each class is an  average  annual  compounded  rate of return for each year in a
specified number of years. It is the rate of return based on the change in value
of a hypothetical  initial  investment of $1,000 ("P" in the formula below) held
for a number of years ("n") to achieve an Ending  Redeemable Value ("ERV" in the
formula) of that investment, according to the following formula:

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

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

                 1/n
            (ERV)
            (---)   -1 = Average Annual Total Return
            ( P )


         |_| Cumulative Total Return. The "cumulative total return"  calculation
measures  the change in value of a  hypothetical  investment  of $1,000  over an
entire period of years. Its calculation uses some of the same factors as average
annual  total  return,  but it does not  average the rate of return on an annual
basis. Cumulative total return is determined as follows:

            ERV - P
            ------- = Total Return
               P


         |_| Total  Returns at Net Asset  Value.  From time to time the Fund may
also quote a cumulative  or an average  annual total return "at net asset value"
(without  deducting sales charges) for Class A or Class B shares.  Each is based
on the  difference  in net asset value per share at the beginning and the end of
the  period  for a  hypothetical  investment  in that  class of shares  (without
considering  front-end  or  contingent  deferred  sales  charges) and takes into
consideration the reinvestment of dividends and capital gains distributions.

--------------------------------------------------------------------------------
            The Fund's Total Returns for the Periods Ended 8/31/98
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
          Cumulative Total
Class of  Returns (10
Shares    years or Life of
          Class)                        Average Annual Total Returns
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
                                                   5-Year           10-Year
                                                     (or              (or
                                 1-Year        life-of-class)    life-of-class)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
          After    Without  After    Without  After    Without  After   Without
          Sales    Sales    Sales    Sales    Sales    Sales    Sales   Sales
          Charge   Charge   Charge   Charge   Charge   Charge   Charge  Charge
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class A   81.84%   90.90%   -6.11%   -1.42%   5.44%    6.47%    6.65%1  7.21%1
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Class B   24.52%   25.46%   -7.10%   -2.41%   5.09%    5.42%    3.83%2  3.96%2
--------------------------------------------------------------------------------
1. Inception of Class A:      5/18/90
2.  Inception of Class B:  10/29/93.  Because Class B shares  convert to Class A
shares 72 months after purchase,  the "Life-of-Class"  return for Class B shares
uses Class A performance for the period after conversion.


Other  Performance  Comparisons.  The Fund compares its performance  annually to
that of an  appropriate  broadly-based  market  index in its  Annual  Report  to
shareholders.  You can obtain that  information by contacting the Transfer Agent
at the addresses or telephone  numbers  shown on the cover of this  Statement of
Additional  Information.  The Fund may also compare its  performance  to that of
other  investments,  including  other  mutual  funds,  or  use  rankings  of its
performance  by  independent  ranking  entities.  Examples of these  performance
comparisons are set forth below.

         |_| Lipper Rankings. From time to time the Fund may publish the ranking
of the performance of its classes of shares by Lipper Analytical Services,  Inc.
("Lipper").  Lipper is a  widely-recognized  independent  mutual fund monitoring
service.  Lipper  monitors the  performance of regulated  investment  companies,
including the Fund,  and ranks their  performance  for various  periods based on
categories  relating to investment  objectives.  The  performance of the Fund is
ranked by Lipper against all other  California  municipal debt funds. The Lipper
performance rankings are based on total returns that include the reinvestment of
capital gain distributions and income dividends but do not take sales charges or
taxes into  consideration.  Lipper also  publishes  "peer-group"  indices of the
performance  of all mutual funds in a category  that it monitors and averages of
the performance of the funds in particular categories.

         |_|  Morningstar  Rankings.  From time to time the Fund may publish the
ranking  and/or  star  rating of the  performance  of its  classes  of shares by
Morningstar,  Inc., an independent mutual fund monitoring  service.  Morningstar
rates and ranks  mutual funds in broad  investment  categories:  domestic  stock
funds,  international stock funds,  taxable bond funds and municipal bond funds.
The Fund is included in the municipal bond category.

      Morningstar  proprietary  star ratings  reflect  historical  risk-adjusted
    total investment  return.  Investment  return measures a fund's (or class's)
    one-, three-,  five- and ten-year average annual total returns (depending on
    the  inception of the fund or class) in excess of 90-day U.S.  Treasury bill
    returns  after  considering  the fund's  sales  charges and  expenses.  Risk
    measures a fund's (or class's)  performance  below 90-day U.S. Treasury bill
    returns.  Risk and  investment  return are  combined to produce star ratings
    reflecting  performance  relative to the other fund in the fund's  category.
    Five stars is the  "highest"  rating (top 10% of funds in a category),  four
    stars is "above average" (next 22.5%),  three stars is "average" (next 35%),
    two stars is "below  average" (next 22.5%) and one star is "lowest"  (bottom
    10%).  The current star ranking is the fund's (or class's)  overall  rating,
    which is the fund's  3-year  rating or its  combined  3- and  5-year  rating
    (weighted 60%/40% respectively), or its combined 3-, 5-, and 10-year ranking
    (weighted 40%/30%/30%, respectively), depending on the inception date of the
    fund (or class). Ratings are subject to change monthly.

The Fund may also compare its total return ranking to that of other funds in its
Morningstar  category,  in addition  to its star  ratings.  Those  total  return
rankings  are  percentages  from one percent to one hundred  percent and are not
risk adjusted. For example if a fund is in the 94th percentile,  that means that
94% of the funds in the same category performed better than it did.

         |_|  Performance   Rankings  and  Comparisons  by  Other  Entities  and
Publications.  From time to time the Fund may include in its  advertisements and
sales literature performance  information about the Fund cited in newspapers and
other periodicals such as The New York Times, The Wall Street Journal, Barron's,
or similar  publications.  That information may include  performance  quotations
from other sources,  including  Lipper and  Morningstar.  The performance of the
Fund's classes of shares may be compared in  publications  to the performance of
various market indices or other investments, and averages,  performance rankings
or other benchmarks prepared by recognized mutual fund statistical services.

      Investors  may also wish to compare  the  Fund's  returns to the return on
fixed-income  investments  available from banks and thrift  institutions.  Those
include certificates of deposit,  ordinary  interest-paying checking and savings
accounts,  and other forms of fixed or variable time deposits, and various other
instruments such as Treasury bills.  However, the Fund's returns and share price
are not guaranteed or insured by the FDIC or any other agency and will fluctuate
daily,  while  bank  depository  obligations  may be insured by the FDIC and may
provide fixed rates of return. Repayment of principal and payment of interest on
Treasury  securities  is  backed  by the  full  faith  and  credit  of the  U.S.
government.

      From time to time, the Fund may publish rankings or ratings of the Manager
or Transfer Agent, and of the investor services provided by them to shareholders
of the Oppenheimer  funds,  other than  performance  rankings of the Oppenheimer
funds themselves. Those ratings or rankings of shareholder and investor services
by third parties may include  comparisons of their services to those provided by
other mutual fund families selected by the rating or ranking services.  They may
be based upon the opinions of the rating or ranking  service  itself,  using its
research or judgment, or based upon surveys of investors,  brokers, shareholders
or others.


--------------------------------------------------------------------------------
A B O U T  Y O U R  A C C O U N T
--------------------------------------------------------------------------------

            How to Buy Shares

Additional  information is presented below about the methods that can be used to
buy shares of the Fund.  Appendix C contains more information  about the special
sales charge  arrangements  offered by the Fund, and the  circumstances in which
sales charges may be reduced or waived for certain classes of investors.

AccountLink.  When shares are purchased through AccountLink,  each purchase must
be at least $25.  Shares  will be  purchased  on the  regular  business  day the
Distributor  is  instructed  to initiate the  Automated  Clearing  House ("ACH")
transfer to buy the shares.  Dividends will begin to accrue on shares  purchased
with the proceeds of ACH transfers on the business day the Fund receives Federal
Funds for the purchase  through the ACH system  before the close of The New York
Stock Exchange. The Exchange normally closes at 4:00 P.M., but may close earlier
on certain days. If Federal Funds are received on a business day after the close
of the Exchange, the shares will be purchased and dividends will begin to accrue
on the next regular  business  day. The proceeds of ACH  transfers  are normally
received by the Fund 3 days after the transfers are initiated.  The  Distributor
and the Fund are not responsible for any delays in purchasing  shares  resulting
from delays in ACH transmissions.

Reduced Sales Charges.  As discussed in the  Prospectus,  a reduced sales charge
rate may be obtained for Class A shares under Right of Accumulation  and Letters
of Intent  because of the  economies of sales  efforts and reduction in expenses
realized by the  Distributor,  dealers and brokers  making such sales.  No sales
charge is imposed in certain other circumstances described in Appendix C to this
Statement of Additional  Information because the Distributor or dealer or broker
incurs little or no selling expenses.

      |X| Right of  Accumulation.  To qualify for the lower sales  charge  rates
that apply to larger  purchases  of Class A shares,  you and your spouse can add
together:
      o  Class A and Class B shares you purchase for your  individual  accounts,
         or for your  joint  accounts,  or for trust or  custodial  accounts  on
         behalf of your children who are minors, and
      o  current  purchases  of Class A and Class B shares of the Fund and other
         Oppenheimer  funds to reduce  the sales  charge  rate that  applies  to
         current purchases of Class A shares, and
      o  Class  A and  Class  B  shares  of  Oppenheimer  funds  you  previously
         purchased subject to an initial or contingent  deferred sales charge to
         reduce the sales  charge rate for current  purchases of Class A shares,
         provided that you still hold your  investment in one of the Oppenheimer
         funds.

      A fiduciary can count all shares  purchased  for a trust,  estate or other
fiduciary  account  (including  one or more  employee  benefit plans of the same
employer) that has multiple  accounts.  The  Distributor  will add the value, at
current offering price, of the shares you previously purchased and currently own
to the value of  current  purchases  to  determine  the sales  charge  rate that
applies. The reduced sales charge will apply only to current purchases. You must
request it when you buy shares.

      |X| The Oppenheimer  Funds.  The Oppenheimer  funds are those mutual funds
for which the  Distributor  acts as the distributor or the  sub-distributor  and
currently include the following:

                                          Oppenheimer Main Street California
Oppenheimer Bond Fund                     Municipal Fund
                                         Oppenheimer Main Street Growth & Income
Oppenheimer Capital Appreciation Fund     Fund
Oppenheimer Capital Preservation Fund     Oppenheimer Main Street Small Cap Fund
Oppenheimer California Municipal Fund     Oppenheimer MidCap Fund
Oppenheimer Champion Income Fund          Oppenheimer Multiple Strategies Fund
Oppenheimer Convertible Securities Fund   Oppenheimer Municipal Bond Fund
Oppenheimer Developing Markets Fund       Oppenheimer New York Municipal Fund
Oppenheimer Disciplined Allocation Fund   Oppenheimer New Jersey Municipal Fund
Oppenheimer Disciplined Value Fund       Oppenheimer Pennsylvania Municipal Fund
Oppenheimer Discovery Fund                Oppenheimer Quest Balanced Value Fund
                                          Oppenheimer Quest Capital Value Fund,
Oppenheimer Enterprise Fund               Inc.
                                          Oppenheimer Quest Global Value Fund,
Oppenheimer Capital Income Fund           Inc.
Oppenheimer  Europe Fund Oppenheimer  Quest  Opportunity  Value Fund Oppenheimer
Florida Municipal Fund Oppenheimer Quest Small Cap Value Fund Oppenheimer Global
Fund Oppenheimer Quest Value Fund, Inc.  Oppenheimer Global Growth & Income Fund
Oppenheimer Real Asset Fund Oppenheimer Gold & Special Minerals Fund Oppenheimer
Senior Floating Rate Fund Oppenheimer  Growth Fund Oppenheimer  Strategic Income
Fund Oppenheimer High Yield Fund Oppenheimer Total Return Fund, Inc. Oppenheimer
Insured  Municipal Fund Oppenheimer  Trinity Core Fund Oppenheimer  Intermediate
Municipal Fund Oppenheimer  Trinity Growth Fund Oppenheimer  International  Bond
Fund  Oppenheimer  Trinity  Value Fund  Oppenheimer  International  Growth  Fund
Oppenheimer U.S.  Government Trust Oppenheimer  International Small Company Fund
Oppenheimer  World Bond Fund Oppenheimer  Large Cap Growth Fund Limited-Term New
York  Municipal Fund  Oppenheimer  Limited-Term  Government  Fund Rochester Fund
Municipals

and the following money market funds:

    Centennial America Fund, L. P.          Centennial New York Tax Exempt Trust
    Centennial California Tax Exempt
Trust                                         Centennial Tax Exempt Trust
    Centennial Government Trust               Oppenheimer Cash Reserves
    Centennial Money Market Trust            Oppenheimer Money Market Fund, Inc.

      There is an initial sales charge on the purchase of Class A shares of each
of  the  Oppenheimer  funds  except  the  money  market  funds.   Under  certain
circumstances described in this Statement of Additional Information,  redemption
proceeds of certain  money  market  fund  shares may be subject to a  contingent
deferred sales charge.

Letters of Intent.  Under a Letter of Intent,  if you purchase Class A shares or
Class A and  Class B shares  of the Fund and other  Oppenheimer  funds  during a
13-month  period,  you can reduce  the sales  charge  rate that  applies to your
purchases of Class A shares. The total amount of your intended purchases of both
Class A and Class B shares will  determine the reduced sales charge rate for the
Class A shares purchased during that period.  You can include  purchases made up
to 90 days before the date of the Letter.

      A  Letter  of  Intent  is  an  investor's  statement  in  writing  to  the
Distributor  of the intention to purchase  Class A shares or Class A and Class B
shares of the Fund (and other  Oppenheimer  funds) during a 13-month period (the
"Letter  of  Intent  period").  At the  investor's  request,  this  may  include
purchases made up to 90 days prior to the date of the Letter.  The Letter states
the  investor's  intention to make the  aggregate  amount of purchases of shares
which,  when added to the  investor's  holdings of shares of those  funds,  will
equal  or  exceed  the  amount  specified  in  the  Letter.  Purchases  made  by
reinvestment of dividends or  distributions  of capital gains and purchases made
at net asset value  without  sales  charge do not count  toward  satisfying  the
amount of the Letter.

      A Letter  enables  an  investor  to count  the  Class A and Class B shares
purchased  under the Letter to obtain the reduced sales charge rate on purchases
of Class A shares of the Fund (and other  Oppenheimer  funds) that applies under
the Right of Accumulation to current purchases of Class A shares.  Each purchase
of Class A shares under the Letter will be made at the offering price (including
the sales  charge) that applies to a single  lump-sum  purchase of shares in the
amount intended to be purchased under the Letter.

      In  submitting a Letter,  the  investor  makes no  commitment  to purchase
shares.  However,  if the  investor's  purchases of shares  within the Letter of
Intent  period,  when added to the value (at offering  price) of the  investor's
holdings  of shares on the last day of that  period,  do not equal or exceed the
intended  purchase amount,  the investor agrees to pay the additional  amount of
sales charge applicable to such purchases. That amount is described in "Terms of
Escrow,"  below  (those  terms may be  amended by the  Distributor  from time to
time).  The  investor  agrees that shares  equal in value to 5% of the  intended
purchase  amount  will be held in escrow by the  Transfer  Agent  subject to the
Terms of  Escrow.  Also,  the  investor  agrees  to be bound by the terms of the
Prospectus,  this Statement of Additional  Information and the Application  used
for a Letter of Intent. If those terms are amended,  as they may be from time to
time by the Fund, the investor  agrees to be bound by the amended terms and that
those amendments will apply automatically to existing Letters of Intent.

      If the total eligible purchases made during the Letter of Intent period do
not equal or exceed the intended  purchase  amount,  the commissions  previously
paid to the dealer of record  for the  account  and the  amount of sales  charge
retained by the Distributor  will be adjusted to the rates  applicable to actual
total purchases.  If total eligible purchases during the Letter of Intent period
exceed the intended  purchase amount and exceed the amount needed to qualify for
the next sales  charge rate  reduction  set forth in the  Prospectus,  the sales
charges paid will be adjusted to the lower rate.  That  adjustment  will be made
only if and when the dealer returns to the  Distributor the excess of the amount
of commissions allowed or paid to the dealer over the amount of commissions that
apply to the actual amount of purchases.  The excess commissions returned to the
Distributor  will be used  to  purchase  additional  shares  for the  investor's
account at the net asset value per share in effect on the date of such purchase,
promptly after the Distributor's receipt thereof.

      The Transfer  Agent will not hold shares in escrow for purchases of shares
of the Fund and other  Oppenheimer  funds by  OppenheimerFunds  prototype 401(k)
plans under a Letter of Intent.  If the intended  purchase amount under a Letter
of Intent  entered  into by an  OppenheimerFunds  prototype  401(k)  plan is not
purchased by the plan by the end of the Letter of Intent  period,  there will be
no adjustment of commissions paid to the broker-dealer or financial  institution
of record for accounts held in the name of that plan.

      In determining  the total amount of purchases made under a Letter,  shares
redeemed by the investor prior to the termination of the Letter of Intent period
will be deducted.  It is the  responsibility  of the dealer of record and/or the
investor  to advise the  Distributor  about the Letter in placing  any  purchase
orders  for the  investor  during  the  Letter  of  Intent  period.  All of such
purchases must be made through the Distributor.

         |_|      Terms of Escrow That Apply to Letters of Intent.

          1. Out of the initial purchase (or subsequent  purchases if necessary)
    made pursuant to a Letter, shares of the Fund equal in value up to 5% of the
    intended  purchase amount specified in the Letter shall be held in escrow by
    the Transfer Agent. For example, if the intended purchase amount is $50,000,
    the escrow shall be shares  valued in the amount of $2,500  (computed at the
    offering price adjusted for a $50,000  purchase).  Any dividends and capital
    gains  distributions  on  the  escrowed  shares  will  be  credited  to  the
    investor's account.

      2. If the total minimum investment specified under the Letter is completed
within the  thirteen-month  Letter of Intent period, the escrowed shares will be
promptly released to the investor.

      3. If, at the end of the thirteen-month  Letter of Intent period the total
purchases  pursuant  to the Letter are less than the  intended  purchase  amount
specified in the Letter,  the investor must remit to the  Distributor  an amount
equal to the difference between the dollar amount of sales charges actually paid
and the amount of sales  charges  which would have been paid if the total amount
purchased  had been made at a single  time.  That sales charge  adjustment  will
apply to any shares  redeemed  prior to the  completion  of the  Letter.  If the
difference  in sales charges is not paid within twenty days after a request from
the Distributor or the dealer,  the Distributor  will,  within sixty days of the
expiration  of the Letter,  redeem the number of escrowed  shares  necessary  to
realize such difference in sales charges.  Full and fractional  shares remaining
after such redemption will be released from escrow.  If a request is received to
redeem escrowed shares prior to the payment of such additional sales charge, the
sales charge will be withheld from the redemption proceeds.

      4. By  signing  the  Letter,  the  investor  irrevocably  constitutes  and
appoints the Transfer Agent as  attorney-in-fact to surrender for redemption any
or all escrowed shares.

6.    The shares eligible for purchase under the Letter (or the holding of which
may be counted toward completion of a Letter) include:
(d)   Class A shares sold with a front-end sales charge or subject to a Class A
             contingent deferred sales charge,
(e)   Class B shares of other Oppenheimer funds acquired subject to a contingent
             deferred sales charge, and
(f)          Class A or Class B shares  acquired by exchange of either (1) Class
             A shares of one of the other  Oppenheimer  funds that were acquired
             subject to a Class A initial or contingent deferred sales charge or
             (2) Class B shares of one of the other  Oppenheimer funds that were
             acquired subject to a contingent deferred sales charge.

      6. Shares held in escrow  hereunder  will  automatically  be exchanged for
shares of another  fund to which an exchange is  requested,  as described in the
section of the Prospectus  entitled "How to Exchange Shares" and the escrow will
be transferred to that other fund.

Asset Builder Plans.  To establish an Asset Builder Plan to buy shares  directly
from a bank  account,  you must  enclose a check  (the  minimum  is $25) for the
initial purchase with your  application.  Shares purchased by Asset Builder Plan
payments  from bank  accounts  are subject to the  redemption  restrictions  for
recent  purchases  described in the  Prospectus.  Asset  Builder  Plans are only
available if your bank is an ACH member.  Asset Builder Plans may not be used to
buy  shares  for  OppenheimerFunds  employer -  sponsored  qualified  retirement
accounts.  Asset  Builder Plans also enable  shareholders  of  Oppenheimer  Cash
Reserves to use their fund account to make monthly automatic purchases of shares
of up to four other Oppenheimer funds.

      If you make  payments  from your bank  account to  purchase  shares of the
Fund, your bank account will be debited automatically. Normally the debt will be
made two  business  days  prior to the  investment  dates you  selected  in your
Application.  Neither the Distributor,  the Transfer Agent nor the Fund shall be
responsible  for any delays in purchasing  shares that result from delays in ACH
transmissions.

      Before  you  establish  Asset  Builder  payments,   you  should  obtain  a
prospectus of the selected  fund(s) your financial  advisor (or the Distributor)
and request an application  from the  Distributor.  Complete the application and
return it. You may  change  the amount of the Asset  Builder  payment or you can
terminate these at any time by writing to the Transfer Agent. The Transfer Agent
requires a  reasonable  period  (approximately  10 days)  after  receipt of your
instructions to implement  them. The Fund reserves the right to amend,  suspend,
or discontinue offering Asset Builder plans at any time without prior notice.



<PAGE>


Cancellation of Purchase Orders.  Cancellation of purchase orders for the Fund's
shares (for  example,  when a purchase  check is  returned  to the Fund  unpaid)
causes a loss to be incurred  when the net asset  value of the Fund's  shares on
the  cancellation  date is less than on the purchase date. That loss is equal to
the amount of the  decline in the net asset  value per share  multiplied  by the
number of shares in the purchase  order.  The investor is  responsible  for that
loss. If the investor fails to compensate the Fund for the loss, the Distributor
will do so. The Fund may reimburse the  Distributor for that amount by redeeming
shares from any account  registered in that investor's  name, or the Fund or the
Distributor may seek other redress.

Classes of Shares.  Each class of shares of the Fund  represents  an interest in
the same portfolio of investments of the Fund. However, each class has different
shareholder  privileges  and features.  The net income  attributable  to Class B
shares  and  the  dividends  payable  on  Class B  shares  will  be  reduced  by
incremental  expenses  borne solely by that class.  Those  expenses  include the
asset-based sales charges to which Class B is subject.

      The  availability  of different  classes of shares  permits an investor to
choose  the  method  of  purchasing  shares  that  is more  appropriate  for the
investor.  That may depend on the amount of the purchase, the length of time the
investor  expects to hold  shares,  and other  relevant  circumstances.  Class A
shares  normally  are sold  subject to an initial  sales  charge.  While Class B
shares have no initial  sales charge,  the purpose of the deferred  sales charge
and  asset-based  sales  charge  on  Class B  shares  is the same as that of the
initial  sales  charge on Class A shares - to  compensate  the  Distributor  and
brokers,  dealers and  financial  institutions  that sell shares of the Fund.  A
salesperson  who is  entitled to receive  compensation  from his or her firm for
selling Fund shares may receive different levels of compensation for selling one
class of shares rather than another.

      The  Distributor  will not accept any order in the amount of  $500,000  or
more for Class B shares on behalf of a single  investor  (not  including  dealer
"street name" or omnibus  accounts).  That is because  generally it will be more
advantageous for that investor to purchase Class A shares of the Fund.

         |_| Class B  Conversion.  The  conversion  of Class B shares to Class A
shares after six years is subject to the  continuing  availability  of a private
letter ruling from the Internal Revenue Service, or an opinion of counsel or tax
adviser, to the effect that the conversion of Class B shares does not constitute
a taxable  event for the  shareholder  under  federal  income tax law. If such a
revenue  ruling or  opinion is no longer  available,  the  automatic  conversion
feature  may be  suspended,  in which  event no further  conversions  of Class B
shares would occur while such  suspension  remained in effect.  Although Class B
shares could then be  exchanged  for Class A shares on the basis of relative net
asset value of the two classes, without the imposition of a sales charge or fee,
such exchange could constitute a taxable event for the  shareholder,  and absent
such exchange,  Class B shares might  continue to be subject to the  asset-based
sales charge for longer than six years.

         |_| Allocation of Expenses. The Fund pays expenses related to its daily
operations,  such as custodian bank fees, Directors' fees, transfer agency fees,
legal fees and auditing costs.  Those expenses are paid out of the Fund's assets
and are not paid directly by shareholders.


<PAGE>


However,  those expenses reduce the net asset value of shares, and therefore are
indirectly borne by shareholders through their investment.

      The  methodology  for  calculating  the net  asset  value,  dividends  and
distributions  of the Fund's  share  classes  recognizes  two types of expenses.
General expenses that do not pertain specifically to any one class are allocated
pro rata to the shares of all classes. The allocation is based on the percentage
of the Fund's total assets that is represented by the assets of each class,  and
then  equally to each  outstanding  share  within a given  class.  Such  general
expenses include  management fees, legal,  bookkeeping and audit fees,  printing
and mailing costs of shareholder reports, Prospectuses, Statements of Additional
Information and other materials for current  shareholders,  fees to unaffiliated
Directors,  custodian bank  expenses,  share issuance  costs,  organization  and
start-up costs,  interest,  taxes and brokerage  commissions,  and non-recurring
expenses, such as litigation costs.

      Other expenses that are directly  attributable  to a particular  class are
allocated equally to each outstanding share within that class.  Examples of such
expenses  include  distribution  and service  plan  (12b-1)  fees,  transfer and
shareholder servicing agent fees and expenses,  and shareholder meeting expenses
(to the extent that such expenses pertain only to a specific class).

Determination  of Net Asset Values Per Share.  The net asset values per share of
each class of shares of the Fund are  determined  as of the close of business of
The New  York  Stock  Exchange  on each  day that  the  Exchange  is  open.  The
calculation is done by dividing the value of the Fund's net assets  attributable
to a class by the  number of  shares of that  class  that are  outstanding.  The
Exchange  normally  closes at 4:00 P.M., New York time, but may close earlier on
some other days (for example,  in case of weather emergencies or on days falling
before a holiday).  The  Exchange's  most recent annual  announcement  (which is
subject to change) states that it will close on New Year's Day, Presidents' Day,
Martin Luther King, Jr. Day, Good Friday,  Memorial Day, Independence Day, Labor
Day, Thanksgiving Day and Christmas Day. It may also close on other days.

      Dealers  other  than  Exchange  members  may  conduct  trading  in certain
securities on days on which the Exchange is closed (including  weekends and U.S.
holidays)  or after 4:00 P.M. on a regular  business  day.  The Fund's net asset
values will not be calculated on those days, and the value of some of the Fund's
portfolio  securities may change  significantly on those days, when shareholders
may not purchase or redeem shares.

     |X|  Securities  Valuation.  The Fund's Board of Directors has  established
procedures  for  the  valuation  of the  Fund's  securities.  In  general  those
procedures are as follows:

      o Long-term debt  securities  having a remaining  maturity in excess of 60
days  are  valued  based  on the mean  between  the  "bid"  and  "asked"  prices
determined  by a  portfolio  pricing  service  approved  by the Fund's  Board of
Directors  or  obtained  by the  Manager  from two active  market  makers in the
security on the basis of reasonable inquiry.
      o The  following  securities  are valued at the mean between the "bid" and
"asked" prices  determined by a pricing service  approved by the Fund's Board of
Directors  or  obtained  by the  Manager  from two active  market  makers in the
security on the basis of reasonable inquiry:
(4) debt instruments that have a maturity of more than 397 days when issued, (5)
debt instruments that had a maturity of 397 days or less when issued and have
         a remaining maturity of more than 60 days, and
(6)      non-money  market debt  instruments  that had a maturity of 397 days or
         less when  issued and which  have a  remaining  maturity  of 60 days or
         less.
      o The following  securities are valued at cost,  adjusted for amortization
of premiums and accretion of discounts: (3) money market debt securities held by
a non-money market fund that had a
            maturity  of less than 397 days when  issued  that have a  remaining
            maturity of 60 days or less, and
(4)         debt  instruments  held by a money market fund that have a remaining
            maturity of 397 days or less.
      o    Securities    (including    restricted    securities)    not   having
readily-available  market  quotations are valued at fair value  determined under
the Board's procedures.

      If the  Manager  is unable to locate  two  market  makers  willing to give
quotes,  a  security  may be priced at the mean  between  the "bid" and  "asked"
prices  provided by a single  active market maker (which in certain cases may be
the "bid" price if no "asked" price is available).

      In the case of municipal  securities,  when last sale  information  is not
generally available,  the Manager may use pricing services approved by the Board
of Directors. The pricing service may use "matrix" comparisons to the prices for
comparable instruments on the basis of quality,  yield, maturity.  Other special
factors may be involved (such as the  tax-exempt  status of the interest paid by
municipal  securities).  The Manager  will  monitor the  accuracy of the pricing
services.  That  monitoring  may include  comparing  prices  used for  portfolio
valuation to actual sales prices of selected securities.

      Puts,  calls,  interest rate futures and municipal  bond index futures are
valued at the last sale price on the principal exchange on which they are traded
or on NASDAQ, as applicable,  as determined by a pricing service approved by the
Board of  Directors  or by the  Manager.  If there were no sales that day,  they
shall be valued at the last sale  price on the  preceding  trading  day if it is
within the  spread of the  closing  "bid" and  "asked"  prices on the  principal
exchange  or on NASDAQ on the  valuation  date.  If not,  the value shall be the
closing bid price on the principal  exchange or on NASDAQ on the valuation date.
If the put,  call or future is not traded on an exchange or on NASDAQ,  it shall
be valued by the mean between "bid" and "asked"  prices  obtained by the Manager
from two active market  makers.  In certain cases that may be at the "bid" price
if no "asked" price is available.

      When the Fund writes an option, an amount equal to the premium received is
included  in the Fund's  Statement  of Assets and  Liabilities  as an asset.  An
equivalent credit is included in the liability  section.  The credit is adjusted
("marked-to-market")  to reflect the  current  market  value of the  option.  In
determining the Fund's gain on investments, if a call or put written by the Fund
is exercised,  the proceeds are increased by the premium received.  If a call or
put  written  by the Fund  expires,  the Fund  has a gain in the  amount  of the
premium. If the Fund enters into a closing purchase transaction,  it will have a
gain or loss,  depending  on whether the premium  received was more or less than
the cost of the closing  transaction.  If the Fund exercises a put it holds, the
amount the Fund receives on its sale of the underlying  investment is reduced by
the amount of premium paid by the Fund.
How to Sell Shares

Information on how to sell shares of the Fund is stated in the  Prospectus.  The
information  below  provides  additional  information  about the  procedures and
conditions for redeeming shares.

Checkwriting.  When a check is presented to the Fund's bank for  clearance,  the
bank will ask the Fund to  redeem a  sufficient  number  of full and  fractional
shares in the  shareholder's  account  to cover the  amount of the  check.  This
enables the  shareholder to continue to receive  dividends on those shares until
the check is presented to the Fund.  Checks may not be presented  for payment at
the  offices of the bank  listed on the check or at the Fund's  custodian  bank.
That limitation does not affect the use of checks for the payment of bills or to
obtain cash at other banks.  The Fund  reserves  the right to amend,  suspend or
discontinue offering Checkwriting privileges at any time without prior notice.

      In choosing to take advantage of the Checkwriting privilege by signing the
Account  Application or by completing a Checkwriting  card,  each individual who
signs:
(7)      for individual  accounts,  represents that they are the registered
         owner(s) of the shares of the Fund in that account;
(8)      for accounts for corporations, partnerships, trusts and other entities,
         represents that they are an officer,  general partner, trustee or other
         fiduciary or agent, as applicable,  duly authorized to act on behalf of
         such registered owner(s);
(9)      authorizes  the Fund, its Transfer Agent and any bank through which the
         Fund's drafts  (checks) are payable to pay all checks drawn on the Fund
         account of such  person(s) and to redeem a sufficient  amount of shares
         from that account to cover payment of each check;
(10)     specifically  acknowledges  that if they choose to permit  checks to be
         honored if there is a single  signature on checks drawn  against  joint
         accounts, or accounts for corporations,  partnerships,  trusts or other
         entities,  the  signature  of any  one  signatory  on a  check  will be
         sufficient to authorize  payment of that check and redemption  from the
         account,  even if that account is  registered in the names of more than
         one  person  or more  than  one  authorized  signature  appears  on the
         Checkwriting card or the Application, as applicable;
(11)     understands that the Checkwriting  privilege may be terminated or
         amended at any time by the Fund and/or the Fund's bank; and
(12)     acknowledges  and agrees that neither the Fund nor its bank shall incur
         any  liability  for  that  amendment  or  termination  of  checkwriting
         privileges or for redeeming shares to pay checks reasonably believed by
         them to be genuine, or for returning or not paying checks that have not
         been accepted for any reason.

Reinvestment Privilege.  Within six months of a redemption, a shareholder may
reinvest all or part of the redemption proceeds of:
      o  Class A shares purchased  subject to an initial sales charge or Class A
         shares on which a contingent deferred sales charge was paid, or
      o  Class B shares  that were  subject to the Class B  contingent  deferred
         sales charge when redeemed.

      The  reinvestment  may be made without sales charge only in Class A shares
of the Fund or any of the other  Oppenheimer funds into which shares of the Fund
are  exchangeable as described in "How to Exchange  Shares" below.  Reinvestment
will be at the net asset value next computed  after the Transfer  Agent receives
the  reinvestment  order.  The shareholder  must ask the Transfer Agent for that
privilege  at the time of  reinvestment.  The Fund may  amend,  suspend or cease
offering this reinvestment privilege at any time as to shares redeemed after the
date of such amendment, suspension or cessation.

      Any  capital  gain that was  realized  when the shares  were  redeemed  is
taxable,  and reinvestment  will not alter any capital gains tax payable on that
gain.  If there has been a capital  loss on the  redemption,  some or all of the
loss may not be tax  deductible,  depending  on the  timing  and  amount  of the
reinvestment.  Under the Internal  Revenue Code, if the  redemption  proceeds of
Fund  shares on which a sales  charge was paid are  reinvested  in shares of the
Fund or another of the Oppenheimer  funds within 90 days of payment of the sales
charge, the shareholder's basis in the shares of the Fund that were redeemed may
not include the amount of the sales charge  paid.  That would reduce the loss or
increase the gain  recognized  from the  redemption.  However,  in that case the
sales  charge  would  be  added  to the  basis  of the  shares  acquired  by the
reinvestment of the redemption proceeds.

Payments "In Kind".  The Prospectus  states that payment for shares tendered for
redemption is ordinarily  made in cash.  However,  the Board of Directors of the
Fund may determine  that it would be  detrimental  to the best  interests of the
remaining  shareholders of the Fund to make payment of a redemption order wholly
or partly in cash.  In that case,  the Fund may pay the  redemption  proceeds in
whole or in part by a  distribution  "in  kind" of  liquid  securities  from the
portfolio of the Fund, in lieu of cash.

      The Fund has elected to be  governed  by Rule 18f-1  under the  Investment
Company Act.  Under that rule,  the Fund is obligated to redeem shares solely in
cash up to the lesser of $250,000 or 1% of the net assets of the Fund during any
90-day  period for any one  shareholder.  If shares are  redeemed  in kind,  the
redeeming  shareholder  might  incur  brokerage  or other  costs in selling  the
securities for cash. The Fund will value  securities  used to pay redemptions in
kind  using the same  method  the Fund uses to value  its  portfolio  securities
described  above  under  "Determination  of Net Asset  Values Per  Share."  That
valuation will be made as of the time the redemption price is determined.

Involuntary  Redemptions.  The Fund's Board of Directors  has the right to cause
the  involuntary  redemption  of the shares held in any account if the aggregate
net asset value of those  shares is less than $500 or such lesser  amount as the
Board may fix. The Board will not cause the involuntary  redemption of shares in
an account if the  aggregate net asset value of such shares has fallen below the
stated minimum solely as a result of market fluctuations. If the Board exercises
this right, it may also fix the  requirements  for any notice to be given to the
shareholders  in question (not less than 30 days).  The Board may  alternatively
set  requirements  for the shareholder to increase the investment,  or set other
terms and conditions so that the shares would not be involuntarily redeemed.



<PAGE>


Transfers of Shares. A transfer of shares to a different  registration is not an
event that  triggers  the payment of sales  charges.  Therefore,  shares are not
subject to the payment of a contingent deferred sales charge of any class at the
time of  transfer  to the name of another  person or entity.  It does not matter
whether the transfer occurs by absolute assignment,  gift or bequest, as long as
it does not involve,  directly or indirectly,  a public sale of the shares. When
shares  subject to a  contingent  deferred  sales  charge are  transferred,  the
transferred shares will remain subject to the contingent  deferred sales charge.
It  will  be  calculated  as if the  transferee  shareholder  had  acquired  the
transferred  shares in the same manner and at the same time as the  transferring
shareholder.

      If less than all shares held in an account are  transferred,  and some but
not all shares in the account  would be subject to a contingent  deferred  sales
charge if redeemed at the time of  transfer,  the  priorities  described  in the
Prospectus  under  "How  to Buy  Shares"  for  the  imposition  of the  Class  B
contingent  deferred sales charge will be followed in  determining  the order in
which shares are transferred.

Sending  Redemption  Proceeds by Wire.  The wire of  redemption  proceeds may be
delayed if the Fund's  custodian bank is not open for business on a day when the
Fund would normally  authorize the wire to be made,  which is usually the Fund's
next regular business day following the redemption. In those circumstances,  the
wire will not be transmitted  until the next bank business day on which the Fund
is open for  business.  No  dividends  will be paid on the  proceeds of redeemed
shares awaiting transfer by wire.

Special  Arrangements  for  Repurchase  of Shares from Dealers and Brokers.  The
Distributor is the Fund's agent to repurchase its shares from authorized dealers
or brokers  on behalf of their  customers.  Shareholders  should  contact  their
broker or dealer to arrange this type of redemption.  The  repurchase  price per
share will be the net asset value next computed after the  Distributor  receives
an order placed by the dealer or broker.  However, if the Distributor receives a
repurchase  order from a dealer or broker  after the close of The New York Stock
Exchange on a regular business day, it will be processed at that day's net asset
value if the order was received by the dealer or broker from its customers prior
to the time the Exchange closes. Normally, the Exchange closes at 4:00 P.M., but
may do so  earlier  on  some  days.  Additionally,  the  order  must  have  been
transmitted  to and received by the  Distributor  prior to its close of business
that day (normally 5:00 P.M.).

      Ordinarily, for accounts redeemed by a broker-dealer under this procedure,
payment  will be made  within  three  business  days after the shares  have been
redeemed upon the Distributor's  receipt of the required redemption documents in
proper  form.  The  signature(s)  of the  registered  owners  on the  redemption
documents must be guaranteed as described in the Prospectus.

Automatic  Withdrawal and Exchange  Plans.  Investors  owning shares of the Fund
valued at $5,000  or more can  authorize  the  Transfer  Agent to redeem  shares
(having  a  value  of at  least  $50)  automatically  on a  monthly,  quarterly,
semi-annual or annual basis under an Automatic  Withdrawal Plan.  Shares will be
redeemed three business days prior to the date requested by the  shareholder for
receipt of the payment.  Automatic  withdrawals of up to $1,500 per month may be
requested  by  telephone  if  payments  are to be made by check  payable  to all
shareholders of record.  Payments must also be sent to the address of record for
the account and the address must not have been changed within the prior 30 days.

      Payments are normally made by check, but shareholders  having  AccountLink
privileges  (see "How To Buy Shares") may arrange to have  Automatic  Withdrawal
Plan  payments  transferred  to the  bank  account  designated  on  the  Account
Application or by signature-guaranteed  instructions sent to the Transfer Agent.
Shares are  normally  redeemed  pursuant to an Automatic  Withdrawal  Plan three
business  days  before the  payment  transmittal  date you select in the Account
Application.  If a contingent  deferred sales charge applies to the  redemption,
the amount of the check or payment will be reduced accordingly.

      The Fund cannot guarantee receipt of a payment on the date requested.  The
Fund reserves the right to amend, suspend or discontinue offering these plans at
any time without prior notice.  Because of the sales charge  assessed on Class A
share purchases,  shareholders  should not make regular additional Class A share
purchases  while  participating  in  an  Automatic   Withdrawal  Plan.  Class  B
shareholders should not establish withdrawal plans, because of the imposition of
the  contingent  deferred  sales charge on such  withdrawals  (except  where the
contingent deferred sales charge is waived as described in Appendix C).

      By requesting an Automatic  Withdrawal or Exchange Plan,  the  shareholder
agrees to the terms and  conditions  that apply to such plans,  as stated below.
These  provisions  may be  amended  from  time to time by the  Fund  and/or  the
Distributor.  When adopted,  any amendments will automatically apply to existing
Plans.

      |X|  Automatic  Exchange  Plans.  Shareholders  can authorize the Transfer
Agent to exchange a  pre-determined  amount of shares of the Fund for shares (of
the  same  class)  of  other  Oppenheimer  funds  automatically  on  a  monthly,
quarterly,  semi-annual  or annual basis under an Automatic  Exchange  Plan. The
minimum  amount  that  may be  exchanged  to each  other  fund  account  is $25.
Instructions  should  be  provided  on  the   OppenheimerFunds   Application  or
signature-guaranteed instructions.  Exchanges made under these plans are subject
to the  restrictions  that apply to  exchanges  as set forth in "How to Exchange
Shares" in the Prospectus and below in this Statement of Additional Information.

      |X| Automatic  Withdrawal Plans. Fund shares will be redeemed as necessary
to meet  withdrawal  payments.  Shares  acquired  without a sales charge will be
redeemed  first.  Shares  acquired with  reinvested  dividends and capital gains
distributions  will be redeemed next,  followed by shares  acquired with a sales
charge, to the extent necessary to make withdrawal payments.  Depending upon the
amount withdrawn, the investor's principal may be depleted.  Payments made under
these plans should not be considered as a yield or income on your investment.

      The Transfer Agent will  administer the  investor's  Automatic  Withdrawal
Plan as agent for the  shareholder(s)  (the  "Planholder") who executed the Plan
authorization and application  submitted to the Transfer Agent. Neither the Fund
nor the  Transfer  Agent shall incur any  liability  to the  Planholder  for any
action taken or not taken by the Transfer  Agent in good faith to administer the
Plan. Share certificates will not be issued for shares of the Fund purchased for
and held under the Plan,  but the Transfer  Agent will credit all such shares to
the account of the Planholder on the records of the Fund. Any share certificates
held by a Planholder  may be  surrendered  unendorsed to the Transfer Agent with
the Plan  application so that the shares  represented by the  certificate may be
held under the Plan.

      For  accounts  subject to Automatic  Withdrawal  Plans,  distributions  of
capital gains must be  reinvested  in shares of the Fund,  which will be done at
net asset value without a sales charge.  Dividends on shares held in the account
may be paid in cash or reinvested.

      Shares will be redeemed to make withdrawal payments at the net asset value
per share  determined on the redemption  date.  Checks or  AccountLink  payments
representing the proceeds of Plan withdrawals will normally be transmitted three
business days prior to the date  selected for receipt of the payment,  according
to the choice specified in writing by the Planholder.  Receipt of payment on the
date selected cannot be guaranteed.

      The amount and the  interval of  disbursement  payments and the address to
which  checks  are to be mailed or  AccountLink  payments  are to be sent may be
changed at any time by the  Planholder  by writing to the  Transfer  Agent.  The
Planholder should allow at least two weeks' time after mailing such notification
for the requested  change to be put in effect.  The Planholder may, at any time,
instruct the Transfer Agent by written notice to redeem all, or any part of, the
shares held under the Plan.  That  notice  must be in proper form in  accordance
with the requirements of the then-current  Prospectus of the Fund. In that case,
the Transfer  Agent will redeem the number of shares  requested at the net asset
value  per  share  in  effect  and will  mail a check  for the  proceeds  to the
Planholder.

      The Planholder may terminate a Plan at any time by writing to the Transfer
Agent.  The Fund may also give  directions to the Transfer  Agent to terminate a
Plan. The Transfer Agent will also terminate a Plan upon its receipt of evidence
satisfactory  to it that the  Planholder  has died or is legally  incapacitated.
Upon  termination of a Plan by the Transfer Agent or the Fund,  shares that have
not  been  redeemed  will  be  held in  uncertificated  form in the  name of the
Planholder. The account will continue as a dividend-reinvestment, uncertificated
account unless and until proper  instructions  are received from the Planholder,
his or her executor or guardian, or another authorized person.

      To use shares held under the Plan as collateral for a debt, the Planholder
may  request  issuance  of a portion of the shares in  certificated  form.  Upon
written  request from the  Planholder,  the Transfer  Agent will  determine  the
number of shares  for which a  certificate  may be issued  without  causing  the
withdrawal checks to stop.  However,  should such  uncertificated  shares become
exhausted, Plan withdrawals will terminate.

      If the Transfer  Agent ceases to act as transfer  agent for the Fund,  the
Planholder will be deemed to have appointed any successor  transfer agent to act
as agent in administering the Plan.



<PAGE>


            How to Exchange Shares

As stated in the Prospectus,  shares of a particular class of Oppenheimer  funds
having  more than one class of shares  may be  exchanged  only for shares of the
same class of other Oppenheimer  funds.  Shares of Oppenheimer funds that have a
single class  without a class  designation  are deemed "Class A" shares for this
purpose.  You can obtain a current list showing  which funds offer which classes
by calling the Distributor at 1-800-525-7048.

o        All of the  Oppenheimer  funds  currently offer Class A, B and C shares
         except  Oppenheimer  Money Market Fund,  Inc.,  Centennial Money Market
         Trust,  Centennial  Tax  Exempt  Trust,  Centennial  Government  Trust,
         Centennial New York Tax Exempt Trust,  Centennial California Tax Exempt
         Trust,  and  Centennial  America Fund,  L.P.,  which only offer Class A
         shares.
o        Oppenheimer Main Street California Municipal Fund currently offers only
         Class A and Class B shares.
o        Class B and Class C shares of  Oppenheimer  Cash Reserves are generally
         available  only by  exchange  from the same  class of  shares  of other
         Oppenheimer funds or through OppenheimerFunds-sponsored 401(k) plans.
o        Only certain Oppenheimer funds currently offer Class Y shares.  Class Y
         shares of  Oppenheimer  Real Asset Fund may not be exchanged for shares
         of any other fund.
o        Class M  shares  of  Oppenheimer  Convertible  Securities  Fund  may be
         exchanged only for Class A shares of other Oppenheimer  funds. They may
         not be  acquired  by  exchange  of  shares  of any  class of any  other
         Oppenheimer  funds  except Class A shares of  Oppenheimer  Money Market
         Fund or  Oppenheimer  Cash  Reserves  acquired  by  exchange of Class M
         shares.
o        Class A shares  of  Senior  Floating  Rate  Fund are not  available  by
         exchange of Class A shares of other Oppenheimer  funds.  Class A shares
         of Senior Floating Rate Fund that are exchanged for shares of the other
         Oppenheimer  funds  may not be  exchanged  back for  Class A shares  of
         Senior Floating Rate Fund.
o        Class X shares of Limited Term New York Municipal Fund can be exchanged
         only for Class B shares of other Oppenheimer funds and no exchanges may
         be made to Class X shares.
o        Shares of Oppenheimer  Capital  Preservation  Fund may not be exchanged
         for shares of Oppenheimer  Money Market Fund,  Inc.,  Oppenheimer  Cash
         Reserves or Oppenheimer Limited-Term Government Fund. Only participants
         in certain retirement plans may purchase shares of Oppenheimer  Capital
         Preservation  Fund, and only those  participants may exchange shares of
         other Oppenheimer funds for shares of Oppenheimer Capital  Preservation
         Fund.

      Class A shares of  Oppenheimer  funds may be  exchanged at net asset value
for shares of any money  market fund offered by the  Distributor.  Shares of any
money market fund  purchased  without a sales charge may be exchanged for shares
of  Oppenheimer  funds  offered  with a sales  charge upon  payment of the sales
charge. They may also be used to purchase shares of Oppenheimer funds subject to
an early withdrawal charge or contingent deferred sales charge.

      Shares  of  Oppenheimer  Money  Market  Fund,  Inc.   purchased  with  the
redemption proceeds of shares of other mutual funds (other than funds managed by
the  Manager  or its  subsidiaries)  redeemed  within  the 30 days prior to that
purchase may  subsequently  be exchanged for shares of other  Oppenheimer  funds
without being subject to an initial  sales charge or contingent  deferred  sales
charge.  To qualify for that  privilege,  the investor or the investor's  dealer
must notify the  Distributor of  eligibility  for this privilege at the time the
shares of Oppenheimer Money Market Fund, Inc. are purchased. If requested,  they
must supply proof of entitlement to this privilege.

      Shares of the Fund acquired by reinvestment of dividends or  distributions
from any of the other  Oppenheimer  funds or from any unit investment  trust for
which  reinvestment  arrangements  have been made  with the  Distributor  may be
exchanged at net asset value for shares of any of the Oppenheimer funds.

      The Fund may amend,  suspend or terminate  the  exchange  privilege at any
time.  Although the Fund may impose these  changes at any time,  it will provide
you with notice of those changes  whenever it is required to do so by applicable
law. It may be required to provide 60 days notice prior to  materially  amending
or  terminating  the exchange  privilege.  That 60 day notice is not required in
extraordinary circumstances.

         |_|  How  Exchanges  Affect  Contingent   Deferred  Sales  Charges.  No
contingent  deferred sales charge is imposed on exchanges of shares of any class
purchased subject to a contingent deferred sales charge.  However,  when Class A
shares  acquired  by  exchange  of Class A shares  of  other  Oppenheimer  funds
purchased  subject to a Class A  contingent  deferred  sales charge are redeemed
within 18 months of the end of the calendar month of the initial purchase of the
exchanged  Class A  shares,  the Class A  contingent  deferred  sales  charge is
imposed on the redeemed shares. The Class B contingent  deferred sales charge is
imposed on Class B shares  acquired by exchange  if they are  redeemed  within 6
years of the initial purchase of the exchanged Class B shares.

      When Class B shares are  redeemed to effect an  exchange,  the  priorities
described in "How To Buy Shares" in the  Prospectus  for the  imposition  of the
Class B contingent  deferred  sales charge will be followed in  determining  the
order in which the shares are exchanged.  Before exchanging shares, shareholders
should take into  account how the exchange  may affect any  contingent  deferred
sales  charge that might be imposed in the  subsequent  redemption  of remaining
shares.  Shareholders  owning shares of more than one Class must specify whether
they intend to exchange Class A or Class B shares.

         |_| Limits on Multiple Exchange Orders.  The Fund reserves the right to
reject  telephone or written  exchange  requests  submitted in bulk by anyone on
behalf of more than one account.  The Fund may accept  requests for exchanges of
up to 50  accounts  per day from  representatives  of  authorized  dealers  that
qualify for this privilege.

         |_| Telephone Exchange Requests. When exchanging shares by telephone, a
shareholder  must have an existing  account in the fund to which the exchange is
to be made. Otherwise, the investor must obtain a Prospectus of that fund before
the exchange  request may be submitted.  If all telephone  lines are busy (which
might occur, for example,  during periods of substantial  market  fluctuations),
shareholders  might not be able to request exchanges by telephone and would have
to submit written exchange requests.

         |_| Processing  Exchange Requests.  Shares to be exchanged are redeemed
on the regular  business day the Transfer Agent receives an exchange  request in
proper form (the "Redemption Date"). Normally, shares of the fund to be acquired
are  purchased on the  Redemption  Date,  but such  purchases  may be delayed by
either  fund up to  five  business  days  if it  determines  that  it  would  be
disadvantaged  by an immediate  transfer of the  redemption  proceeds.  The Fund
reserves the right, in its discretion,  to refuse any exchange  request that may
disadvantage it. For example,  if the receipt of multiple exchange requests from
a dealer might require the disposition of portfolio securities at a time or at a
price  that  might be  disadvantageous  to the  Fund,  the Fund may  refuse  the
request.  When you exchange some or all of your shares from one fund to another,
any  special  account  feature  such  as an  Asset  Builder  Plan  or  Automatic
Withdrawal  Plan,  will be switched to the new fund account  unless you tell the
Transfer Agent not to do so. However,  special  redemption and exchange features
such as  Automatic  Exchange  Plans and  Automatic  Withdrawal  Plans  cannot be
switched to an account in Oppenheimer Senior Floating Rate Fund.

      In connection with any exchange  request,  the number of shares  exchanged
may be less than the number  requested if the  exchange or the number  requested
would include  shares  subject to a restriction  cited in the Prospectus or this
Statement of Additional Information,  or would include shares covered by a share
certificate  that is not  tendered  with the request.  In those cases,  only the
shares available for exchange without restriction will be exchanged.

      The different  Oppenheimer  funds  available  for exchange have  different
investment objectives,  policies and risks. A shareholder should assure that the
fund selected is  appropriate  for his or her  investment and should be aware of
the tax  consequences  of an  exchange.  For  federal  income tax  purposes,  an
exchange  transaction  is  treated as a  redemption  of shares of one fund and a
purchase of shares of another.  "Reinvestment  Privilege," above, discusses some
of the tax  consequences of  reinvestment of redemption  proceeds in such cases.
The  Fund,  the  Distributor,  and the  Transfer  Agent are  unable  to  provide
investment,  tax or legal advice to a shareholder in connection with an exchange
request or any other investment transaction.

                            Dividends, Capital Gains and Taxes

Dividends and Distributions.  Dividends will be payable on shares held of record
at the time of the previous  determination  of net asset value,  or as otherwise
described in "How to Buy Shares."  Daily  dividends will not be declared or paid
on newly purchased  shares until such time as Federal Funds (funds credited to a
member  bank's  account at the  Federal  Reserve  Bank) are  available  from the
purchase  payment for such  shares.  Normally,  purchase  checks  received  from
investors  are  converted  to Federal  Funds on the next  business  day.  Shares
purchased through dealers or brokers normally are paid for by the third business
day following the placement of the purchase order.



<PAGE>


      Shares  redeemed  through the regular  redemption  procedure  will be paid
dividends  through  and  including  the day on which the  redemption  request is
received by the  Transfer  Agent in proper form.  Dividends  will be declared on
shares  repurchased  by a dealer or broker for three business days following the
trade  date (that is, up to and  including  the day prior to  settlement  of the
repurchase).  If all shares in an account are redeemed, all dividends accrued on
shares  of the  same  class  in the  account  will be  paid  together  with  the
redemption proceeds.

      The Fund's  practice of attempting to pay dividends on Class A shares at a
constant  level  requires  the Manager to monitor the Fund's  portfolio  and, if
necessary, to select higher-yielding securities when it is deemed appropriate to
seek income at the level  needed to meet the target.  Those  securities  must be
within  the  Fund's  investment  parameters,  however.  The Fund  expects to pay
dividends  at a  targeted  level  from  its  net  investment  income  and  other
distributable income without any impact on the net asset values per share.

      Dividends, distributions and the proceeds of the redemption of Fund shares
represented  by checks  returned to the Transfer  Agent by the Postal Service as
undeliverable  will be invested in shares of Oppenheimer Money Market Fund, Inc.
Reinvestment  will be made as  promptly  as  possible  after the  return of such
checks  to the  Transfer  Agent,  to  enable  the  investor  to earn a return on
otherwise  idle funds.  Unclaimed  accounts may be subject to state  escheatment
laws, and the Fund and the Transfer Agent will not be liable to  shareholders or
their representatives for compliance with those laws in good faith.

      The amount of a distribution  paid on a class of shares may vary from time
to time depending on market conditions, the composition of the Fund's portfolio,
and expenses  borne by the Fund or borne  separately  by a class.  Dividends are
calculated  in the same manner,  at the same time and on the same day for shares
of each class.  However,  dividends  on Class B shares are  expected to be lower
than dividends on Class A shares.  That is due to the effect of the  asset-based
sales charge on Class B shares.  Those dividends will also differ in amount as a
consequence  of any  difference  in net asset  value  among  Class A and Class B
shares.

Tax  Status of the  Fund's  Dividends  and  Distributions.  The Fund  intends to
qualify  under  the  Internal  Revenue  Code  during  each  fiscal  year  to pay
"exempt-interest dividends" to its shareholders.  Exempt-interest dividends that
are  derived  from  net  investment  income  earned  by the  Fund  on  municipal
securities  will be  excludable  from gross income of  shareholders  for federal
income tax purposes.

      Net  investment  income  includes the allocation of amounts of income from
the  municipal  securities  in the Fund's  portfolio  that are free from federal
income  taxes.  This  allocation  will  be  made  by the  use of one  designated
percentage  applied uniformly to all income dividends paid during the Fund's tax
year.  That  designation  will normally be made following the end of each fiscal
year as to income  dividends  paid in the prior year.  The  percentage of income
designated as tax-exempt  may  substantially  differ from the  percentage of the
Fund's income that was tax-exempt for a given period.

      A portion of the exempt-interest dividends paid by the Fund may be an item
of tax preference for shareholders  subject to the alternative  minimum tax. The
amount of any dividends attributable to tax preference items for purposes of the
alternative  minimum tax will be identified  when tax information is distributed
by the Fund.

      A shareholder receiving a dividend from income earned by the Fund from one
or more of the  following  sources  treats the  dividend  as a receipt of either
ordinary  income or long-term  capital gain in the  computation of gross income,
regardless  of whether the dividend is  reinvested:  certain  taxable  temporary
investments (such as certificates of deposit, repurchase agreements,  commercial
paper   and   obligations   of   the   U.S.   government,   its   agencies   and
instrumentalities);  (5) income from securities  loans; (6) income or gains from
options or futures;  or (7) an excess of net  short-term  capital  gain over net
long-term capital loss from
          the Fund.

      The  Fund's  dividends  will not be  eligible  for the  dividends-received
deduction for  corporations.  Shareholders  receiving  Social Security  benefits
should be aware  that  exempt-interest  dividends  are a factor  in  determining
whether such  benefits  are subject to federal  income tax.  Losses  realized by
shareholders  on the  redemption  of Fund  shares  within six months of purchase
(which period may be shortened by  regulation)  will be  disallowed  for federal
income tax purposes to the extent of exempt-interest  dividends received on such
shares.

      If the Fund  qualifies  as a  "regulated  investment  company"  under  the
Internal Revenue Code, it will not be liable for federal income taxes on amounts
paid by it as dividends and distributions.  That qualification  enables the Fund
to "pass through" its income and realized capital gains to shareholders  without
having to pay tax on them. The Fund qualified as a regulated  investment company
in its last fiscal year and intends to qualify in future years, but reserves the
right not to qualify.  The Internal  Revenue  Code  contains a number of complex
tests to  determine  whether the Fund  qualifies.  The Fund might not meet those
tests in a particular year. If it does not qualify, the Fund will be treated for
tax purposes as an ordinary  corporation  and will receive no tax  deduction for
payments of dividends and distributions made to shareholders.

      In any year in which the Fund qualifies as a regulated  investment company
under the Internal  Revenue Code,  the Fund will also be exempt from  California
corporate income and franchise taxes. It will also be qualified under California
law to pay  exempt  interest  dividends  that  will be  exempt  from  California
personal  income  tax.  That  exemption  applies to the  extent  that the Fund's
distributions  are attributable to interest on California  municipal  securities
and qualifying  obligations of the United States government,  if at least 50% of
the Fund's assets are invested in such  obligations at the close of each quarter
in its tax year. Distributions from the Fund attributable to income from sources
other than California municipal securities and U.S. government  obligations will
generally be subject to California income tax as ordinary income.

      Distributions by the Fund from investment  income and long- and short-term
capital  gains  will  generally  not  be  excludable   from  taxable  income  in
determining  California  corporate  franchise  tax or income  tax for  corporate
shareholders of the Fund. Additionally,  certain distributions paid to corporate
shareholders  of the Fund may be includable in income  subject to the California
alternative minimum tax.

      Under the Internal  Revenue  Code,  by December 31 each year the Fund must
distribute  98% of its taxable  investment  income earned from January 1 through
December  31 of that year and 98% of its  capital  gains  realized in the period
from November 1 of the prior year through  October 31 of the current year. If it
does not, the Fund must pay an excise tax on the amounts not distributed.  It is
presently  anticipated that the Fund will meet those requirements.  However, the
Fund's Board of Directors and the Manager might  determine in a particular  year
that it would be in the best interest of shareholders not to make  distributions
at the required levels and to pay the excise tax on the  undistributed  amounts.
That  would  reduce  the  amount  of  income  or  capital  gains  available  for
distribution to shareholders.

Dividend  Reinvestment  in Another Fund.  Shareholders  of the Fund may elect to
reinvest all dividends and/or capital gains  distributions in shares of the same
class of any of the other Oppenheimer  funds listed above.  Reinvestment will be
made  without  sales  charge at the net  asset  value per share in effect at the
close of business on the payable date of the dividend or distribution.  To elect
this option,  the shareholder must notify the Transfer Agent in writing and must
have an existing  account in the fund selected for  reinvestment.  Otherwise the
shareholder first must obtain a prospectus for that fund and an application from
the Distributor to establish an account.  Dividends  and/or  distributions  from
shares of certain other Oppenheimer funds (other than Oppenheimer Cash Reserves)
may be invested in shares of this Fund on the same basis.

Additional Information About the Fund

The Distributor.  The Fund's shares are sold through dealers,  brokers and other
financial  institutions  that  have  a  sales  agreement  with  OppenheimerFunds
Distributor,  Inc.,  a  subsidiary  of the  Manager  that  acts  as  the  Fund's
Distributor.  The Distributor also distributes  shares of the other  Oppenheimer
funds and is sub-distributor for funds managed by a subsidiary of the Manager.

The Transfer Agent.  OppenheimerFunds  Services, the Fund's Transfer Agent, is a
division  of  the  Manager.   It  is  responsible  for  maintaining  the  Fund's
shareholder  registry  and  shareholder   accounting  records,  and  for  paying
dividends  and  distributions  to  shareholders.  It  also  handles  shareholder
servicing and administrative  functions.  It acts on an "at-cost" basis. It also
acts  as  shareholder   servicing  agent  for  the  other   Oppenheimer   funds.
Shareholders  should direct inquiries about their accounts to the Transfer Agent
at the address and toll-free numbers shown on the back cover.

The Custodian  Bank.  The Bank of New York is the  custodian  bank of the Fund's
assets.  The  custodian  bank's   responsibilities   include   safeguarding  and
controlling  the Fund's  portfolio  securities and handling the delivery of such
securities  to and from the Fund.  It will be the  practice  of the Fund to deal
with the custodian bank in a manner uninfluenced by any banking relationship the
custodian  bank may have with the  Manager and its  affiliates.  The Fund's cash
balances  with the  custodian  bank in excess of $100,000  are not  protected by
federal deposit insurance. Those uninsured balances at times may be substantial.



<PAGE>


Independent Auditors. Deloitte & Touche, LLP are the independent auditors of the
Fund. They audit the Fund's financial statements and perform other related audit
services.  They also act as auditors  for the  Manager  and certain  other funds
advised by the Manager and its affiliates.


<PAGE>


INDEPENDENT AUDITORS' REPORT

===============================================================================
TO THE BOARD OF DIRECTORS AND SHAREHOLDERS OF OPPENHEIMER MAIN STREET CALIFORNIA
MUNICIPAL FUND:

We have audited the accompanying statement of assets and liabilities,  including
the statement of investments,  of Oppenheimer Main Street  California  Municipal
Fund as of August 31, 1999,  the related  statement of  operations  for the year
then ended,  the  statements of changes in net assets for the years ended August
31, 1999 and 1998 and the financial  highlights  for the period July 1, 1994, to
August 31, 1999.  These  financial  statements and financial  highlights are the
responsibility  of the Fund's  management.  Our  responsibility is to express an
opinion on these  financial  statements  and financial  highlights  based on our
audits.

      We conducted our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable  assurance  about  whether the  financial  statements  and  financial
highlights are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  Our  procedures  included  confirmation  of securities  owned as of
August 31, 1999, by correspondence with the custodian and brokers; where replies
were not received from brokers, we performed other auditing procedures. An audit
also includes assessing the accounting principles used and significant estimates
made by  management,  as well as  evaluating  the  overall  financial  statement
presentation.  We believe  that our audits  provide a  reasonable  basis for our
opinion.

        In our opinion,  such  financial  statements  and  financial  highlights
present fairly, in all material respects,  the financial position of Oppenheimer
Main Street California  Municipal Fund as of August 31, 1999, the results of its
operations,  the changes in its net assets, and the financial highlights for the
respective  stated  periods,  in conformity with generally  accepted  accounting
principles.




DELOITTE & TOUCHE LLP

Denver, Colorado
September 22, 1999




<PAGE>



STATEMENT OF INVESTMENTS August 31, 1999

<TABLE>
<CAPTION>
                                                                        RATINGS:

MOODY'S/                                 MARKET

S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)
AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
 MUNICIPAL BONDS AND NOTES--98.8%
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
<C>                  <C>
 CALIFORNIA--90.6%
 Anaheim, CA PFAU TXAL RB, MBIA Insured,
 Inverse Floater, 9.37%, 12/28/18(1)                              Aaa/AAA
$1,000,000           $1,167,500
------------------------------------------------------------------------------------------------------------------
 Berkeley, CA HF RRB, Alta Bates Medical Center,
 Prerefunded, Series A, 6.50%, 12/1/11                              A2/NR
1,500,000            1,609,740
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, American
 Baptist Homes, Series A, 6.20%, 10/1/27                           NR/BBB
1,790,000            1,782,804
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Episcopal
 Homes Foundation, 5.125%, 7/1/18                                   NR/A-
1,500,000            1,383,975
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Rhonda
 Haas Goldman Plaza, 5.125%, 5/15/23
NR/AA-            700,000              638,218
------------------------------------------------------------------------------------------------------------------
 CA CDAU Lease RB, United Airlines,
 Series A, 5.70%, 10/1/33                                        Baa3/BB+
3,200,000            2,976,064
------------------------------------------------------------------------------------------------------------------
 CA CDAU MH RB, Village Riviera Hills,
 Series E, 5.45%, 2/1/25                                           NR/AAA
1,000,000            1,003,830
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RB, Sr. Lien, Prerefunded,
 Series A, 6.50%, 1/1/32                                    Baa3/BBB-/BBB
1,400,000            1,557,892
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RRB, Zero Coupon, 5.98%, 1/15/21(2)              Baa3/BBB-/BBB
5,000,000            1,343,350
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RRB, Zero Coupon, 6%, 1/15/22(2)                 Baa3/BBB-/BBB
5,500,000            1,387,705
------------------------------------------------------------------------------------------------------------------
 CA GOB, 5%, 10/1/27                                          Aa3/AA-/AA-
3,000,000            2,721,030
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM Purchase RB, Series A-2, 6.45%, 8/1/25                Aaa/AAA
2,340,000            2,416,752
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series A, Cl. I, 5.40%, 8/1/26                    Aaa/AAA
1,810,000            1,674,829
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series C, 6.75%, 2/1/25                           Aa2/AA-
4,790,000            4,963,254
------------------------------------------------------------------------------------------------------------------
 CA Infrastructure & ED Bank RB,
 American Center for Wine Food Arts, 5.55%, 12/1/12               NR/A/A
1,710,000            1,697,962
------------------------------------------------------------------------------------------------------------------
 CA PCFAU RB, Pacific Gas & Electric Co. Project,
 Series B, 6.35%, 6/1/09                                           A1/AA-
2,000,000            2,139,500
------------------------------------------------------------------------------------------------------------------
 CA PWBL RB, State Prison Department of
 Corrections, Series E, FSA Insured, 5.50%, 6/1/15            Aaa/AAA/AAA
2,000,000            2,038,960
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series A, 5.75%, 12/1/29                                          NR/AAA
1,905,000            1,999,793
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series B, 7.75%, 9/1/26
NR/AAA            920,000            1,001,770

</TABLE>

              12  Oppenheimer Main Street California Municipal Fund
<PAGE>

<TABLE>
<CAPTION>
                                                                        RATINGS:

MOODY'S/                                 MARKET

S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)
AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
<C>                  <C>
 CALIFORNIA Continued
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series B-5, 6.35%, 12/1/29                                        NR/AAA
$1,470,000           $1,548,007
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series D, Cl. 5, 6.70%, 5/1/29                                    NR/AAA
1,890,000            2,057,983
------------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, The Internext Group, 5.375%, 4/1/17                 NR/BBB
3,000,000            2,794,770
------------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, The Internext Group, 5.375%, 4/1/30                 NR/BBB
1,500,000            1,348,110
------------------------------------------------------------------------------------------------------------------
 CA SCDAU Revenue Refunding COP,
 Inverse Floater, 7.63%, 11/1/15(1)                                 A1/NR
1,200,000            1,101,000
------------------------------------------------------------------------------------------------------------------
 Central CA Joint Powers Health FAU COP,
 Community Hospitals of Central California
 Project, 5%, 2/1/23
Baa1/NR            285,000              247,451
------------------------------------------------------------------------------------------------------------------
 Contra Costa Cnty., CA SPTX RRB,
 CFD 91-1, 5.58%, 8/1/16                                            NR/NR
3,075,000            2,916,853
------------------------------------------------------------------------------------------------------------------
 Corona, CA SFM RB, Sub. Lien,
 Series B, 6.30%, 11/1/28
A2/NR            800,000              823,472
------------------------------------------------------------------------------------------------------------------
 Escondido, CA Union High SDI CAP GOB,
 MBIA Insured, Zero Coupon, 6.20%, 11/1/19(2)                     Aaa/AAA
2,000,000              636,960
------------------------------------------------------------------------------------------------------------------
 Fontana, CA RA TXAL GORB,
 Jurupa Hills Redevelopment Project,
 Prerefunded, Series A, 7.10%, 10/1/23                            NR/BBB+
1,960,000            2,164,389
------------------------------------------------------------------------------------------------------------------
 Fontana, CA RA TXAL Refunding Bonds,
 Jurupa Hills Redevelopment Project,
 Series A, 5.50%, 10/1/19                                         NR/BBB+
1,185,000            1,130,253
------------------------------------------------------------------------------------------------------------------
 Fresno, CA HAU MH RB, Central Valley
 Coalition Projects, Series A, 5.60%, 8/1/30                       NR/AAA
3,075,000            3,107,472
------------------------------------------------------------------------------------------------------------------
 Fresno, CA USD GORB, Series A,
 MBIA Insured, 6.55%, 8/1/20                                  Aaa/AAA/AAA
1,225,000            1,366,353
------------------------------------------------------------------------------------------------------------------
 Fresno, CA USD GOUN, Series A,
 MBIA Insured, 6.40%, 8/1/16                                  Aaa/AAA/AAA
1,000,000            1,108,490
------------------------------------------------------------------------------------------------------------------
 Irvine, CA Improvement Bond Act 1915
 SPAST Bonds, Assessment District No. 94-13,
 Group 2, 5.875%, 9/2/17                                            NR/NR
1,250,000            1,212,225
------------------------------------------------------------------------------------------------------------------
 Irvine, CA Improvement Bonds Act 1915 RB,
 Assessment District 95-12, 6%, 9/2/21                              NR/NR
1,750,000            1,709,295
------------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA PFAU TXAL Bonds,
 Series A, 5.50%, 9/1/30                                           NR/BBB
2,500,000            2,290,650
------------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA School FAU RRB,
 Horsethief Canyon, 5.35%, 9/1/10                                   NR/NR
1,015,000              972,664
------------------------------------------------------------------------------------------------------------------
 Las Virgenes, CA USD CAP Bonds, Series A,
 MBIA Insured, Zero Coupon, 4.95%, 11/1/12(2)                 Aaa/AAA/AAA
2,095,000            1,044,714
</TABLE>

              13 Oppenheimer Main Street California Municipal Fund

<PAGE>

STATEMENT OF INVESTMENTS (Continued)

<TABLE>
<CAPTION>
                                                                        RATINGS:

MOODY'S/                                 MARKET

S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)
AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
<C>                  <C>
 CALIFORNIA Continued
 Long Beach, CA Harbor RRB, Series A,
 FGIC Insured, 6%, 5/15/10                                        Aaa/AAA
$   500,000          $   533,960
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney
 Parking Project, Zero Coupon, 6.95%, 9/1/11(2)               Baa1/BBB/A-
2,340,000            1,198,384
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney
 Parking Project, Zero Coupon, 5.67%, 9/1/16(2)              Baa1/BBB /A-
1,745,000              631,934
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, FSA Insured, 5%, 7/1/12                            Aaa/AAA/AAA
2,000,000            1,974,700
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, FSA Insured, 5%, 7/1/19                            Aaa/AAA/AAA
2,000,000            1,862,880
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, MBIA Insured, 5.25%, 7/1/15                        Aaa/AAA/AAA
2,000,000            1,970,000
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA Public Works FAU RRB,
 Regional Park & Open Space District,
 Series A, 5%, 10/1/16                                             Aa3/AA
1,900,000            1,804,620
------------------------------------------------------------------------------------------------------------------
 Los Angeles, CA USD GOB, Series A,
 FGIC Insured, 6%, 7/1/15                                     Aaa/AAA/AAA
1,000,000            1,069,300
------------------------------------------------------------------------------------------------------------------
 Los Angeles, CA USD GOB, Series B,
 FGIC Insured, 5%, 7/1/23                                     Aaa/AAA/AAA
2,000,000            1,824,640
------------------------------------------------------------------------------------------------------------------
 Palmdale, CA Civic Authority RRB,
 Merged Redevelopment Project,
 Prerefunded, Series A, 6.60%, 9/1/34
Aaa/AAA            595,000              666,317
------------------------------------------------------------------------------------------------------------------
 Palmdale, CA Civic Authority RRB,
 Merged Redevelopment Project,
 Unrefunded Balance, Series A, 6.60%, 9/1/34
Aaa/AAA            405,000              429,029
------------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Refunding Bonds,
 Los Medanos Community Development Project,
 Sub. Lien, 6.20%, 8/1/19                                          NR/BBB
1,000,000            1,027,890
------------------------------------------------------------------------------------------------------------------
 Pomona, CA SFM RRB, Escrowed to Maturity,
 Series A, 7.60%, 5/1/23                                          Aaa/AAA
2,500,000            3,079,700
------------------------------------------------------------------------------------------------------------------
 Pomona, CA USD GORB, Series A,
 MBIA Insured, 6.15%, 8/1/15
Aaa/AAA            500,000              539,920
------------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 FGIC Insured, Inverse Floater, 7.97%, 6/1/19(1)              Aaa/AAA/AAA
1,150,000            1,160,062
------------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 MBIA Insured, Inverse Floater, 9.01%, 7/8/22(1)
Aaa/AAA            500,000              590,625
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
 Prerefunded, 7.55%, 9/1/17                                         NR/NR
1,500,000            1,586,280
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA PFAU TXAL RRB,
 Redevelopment Projects, Series A, 5.625%, 10/1/33              Baa2/BBB-
1,650,000            1,580,106
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA SFM RB, Escrowed to Maturity,
 Series A, 7.80%, 5/1/21                                          Aaa/AAA
1,000,000            1,269,860
</TABLE>

              14 Oppenheimer Main Street California Municipal Fund

<PAGE>




<TABLE>
<CAPTION>
                                                                        RATINGS:

MOODY'S/                                 MARKET

S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)
AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
<C>                  <C>
 CALIFORNIA Continued
 Riverside, CA PFAU Lease RB, AMBAC Insured,
 5.25%, 10/1/17                                               Aaa/AAA/AAA
$2,100,000           $2,046,093
------------------------------------------------------------------------------------------------------------------
 Sacramento Cnty., CA SFM RB,
 Escrowed to Maturity, 8%, 7/1/16(3)                              Aaa/AAA
2,810,000            3,576,315
------------------------------------------------------------------------------------------------------------------
 Sacramento, CA MUD Electric RRB,
 FGIC Insured, Inverse Floater, 9.375%, 8/15/18(1)            Aaa/AAA/AAA
1,500,000            1,674,375
------------------------------------------------------------------------------------------------------------------
 Sacramento, CA Cogeneration Authority RRB,
 MBIA Insured, 5.25%, 7/1/12
Aaa/AAA/AAA            250,000              251,935
------------------------------------------------------------------------------------------------------------------
 Salinas Valley, CA Solid Waste Authority RB,
 5.80%, 8/1/27                                                   Baa3/BBB
1,665,000            1,584,414
------------------------------------------------------------------------------------------------------------------
 San Diego Cnty., CA Water Authority
 Revenue COP, Prerefunded, Series 91-B,
 MBIA Insured, Inverse Floater, 8.87%, 4/8/21(1)                  Aaa/AAA
1,000,000            1,197,500
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA Bay Area Rapid Transit District
 Sales Tax RRB, AMBAC Insured, 6.75%, 7/1/11                  Aaa/AAA/AAA
1,000,000            1,153,350
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. International
 Airport Commission RB, Second Series Issue 13-B,
 MBIA Insured, 8%, 5/1/07                                         Aaa/AAA
1,140,000            1,353,864
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. International
 Airport Commission RB, Second Series Issue 14-A,
 MBIA Insured, 8%, 5/1/07                                         Aaa/AAA
1,290,000            1,532,004
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. RA Lease RB, CAP,
 George R. Moscone Project, Zero Coupon,
 5.36%, 7/1/10(2)                                                A1/A-/A+
4,500,000            2,533,185
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. Redevelopment
 FAU TXAL CAP Refunding Bonds, Redevelopment
 Projects, Series C, Zero Coupon, 5.20%, 8/1/13(2)                   A2/A
2,350,000            1,055,479
------------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road CAP RRB, Series A, 0%/5.75%, 1/15/21(4)          Baa3/BBB-/BBB
3,200,000            1,971,968
------------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road RB, Sr. Lien, Prerefunded, 6.75%, 1/1/32           Aaa/AAA/AAA
3,500,000            3,844,225
------------------------------------------------------------------------------------------------------------------
 San Ysidro, CA SDI GOB,
 AMBAC Insured, 6.125%, 8/1/21
Aaa/AAA            700,000              747,635
------------------------------------------------------------------------------------------------------------------
 South Orange Cnty., CA PFAU SPTX RB,
 Foothill Area, Series C, FGIC Insured, 8%, 8/15/08           Aaa/AAA/AAA
1,500,000            1,845,420
------------------------------------------------------------------------------------------------------------------
 Southern CA Home FAU SFM RB,
 Series A, 7.35%, 9/1/24
NR/AAA            185,000              190,936
------------------------------------------------------------------------------------------------------------------
 Southern CA Metropolitan Water District
 Waterworks RB, Series A, 5%, 7/1/26                               Aa2/AA
1,000,000              911,320
------------------------------------------------------------------------------------------------------------------
 Southern CA Metropolitan Water District
 Waterworks RRB, Inverse Floater, 7.42%, 10/30/20(1)               Aa2/AA
1,200,000            1,152,000
</TABLE>

              15 Oppenheimer Main Street California Municipal Fund

<PAGE>



STATEMENT OF INVESTMENTS (Continued)


<TABLE>
<CAPTION>
                                                                        RATINGS:

MOODY'S/                                 MARKET

S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)
AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>
<C>                  <C>
 California Continued
 Southern CA PPAU Transmission Project RB,
 Inverse Floater, 7.615%, 7/1/12(1)                                Aa3/A+
$2,100,000        $   2,299,500
------------------------------------------------------------------------------------------------------------------
 Stanislaus,  CA  Waste-To-Energy  Financing  Agency Solid Waste Facilities RRB,
 Ogden Martin System, Inc.
 Project, 7.50%, 1/1/05                                             NR/A-
1,285,000            1,321,430
------------------------------------------------------------------------------------------------------------------
 Suisun City, CA PFAU TXAL RB, Suisun City
 Redevelopment Project, Series A, 5.20%, 10/1/28                    NR/A-
2,500,000            2,278,875
------------------------------------------------------------------------------------------------------------------
 Temecula, CA CFD No. 88-12-A SPTX Refunding Bonds,
 5.625%, 9/1/17
NR/NR            535,000              506,629
------------------------------------------------------------------------------------------------------------------
 West Covina, CA COP, Queen of the Valley Hospital,
 Prerefunded, 6.50%, 8/15/19                                        A2/NR
1,120,000            1,248,363

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

126,163,061

------------------------------------------------------------------------------------------------------------------
 U.S. POSSESSIONS--8.2%
 PR CMWLTH GOB, 5.375%, 7/1/25                                     Baa1/A
1,650,000            1,574,595
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH GORB, MBIA Insured,
 Inverse Floater, 8.08%, 7/1/08(1)                                Aaa/AAA
1,500,000            1,620,000
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RB,
 Inverse Floater, 6.75%, 7/1/28(1,5)                                NR/NR
5,000,000            4,165,800
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RRB, Series A,
 AMBAC Insured, 5.50%, 7/1/13                                 Aaa/AAA/AAA
1,500,000            1,543,140
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RRB, Series A,
 AMBAC Insured, 5.50%, 7/1/14                                 Aaa/AAA/AAA
1,500,000            1,537,410
------------------------------------------------------------------------------------------------------------------
 PR Housing Finance Corp. SFM RB,
 Portfolio 1, Series B, 7.65%, 10/15/22
Aaa/AAA            125,000              129,595
------------------------------------------------------------------------------------------------------------------
 PR Industrial, Medical & Environmental PC
 Facilities Tourist RB, Mennonite General
 Hospital Project, Series A, 6.50%, 7/1/12
NR/BBB-/BBB            590,000              603,446
------------------------------------------------------------------------------------------------------------------
 PR Public Buildings Authority RB,
 Government Facilities, Series B,
 AMBAC Insured, 5%, 7/1/27
Aaa/AAA            300,000              275,337

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

11,449,323

------------------------------------------------------------------------------------------------------------------
 TOTAL INVESTMENTS, AT VALUE (COST
$138,482,564)                                        98.8%         137,612,384
------------------------------------------------------------------------------------------------------------------
 OTHER ASSETS NET OF
LIABILITIES                                                         1.2
1,693,187

-----------------------------
 NET
ASSETS
100.0%        $139,305,571

=============================
</TABLE>

              16 Oppenheimer Main Street California Municipal Fund
<PAGE>


FOOTNOTES TO STATEMENT OF INVESTMENTS

To simplify the  listings of  securities,  abbreviations  are used per the table
below:
<TABLE>
<S>       <C>                                            <C>     <C>
 CAP      Capital Appreciation                           MUD     Municipal Utility
District
 CDAU     Communities Development Authority              PCFAU   Pollution Control
Finance Authority
 CFD      Community Facilities District                  PFAU    Public Finance
Authority
 CMWLTH   Commonwealth                                   PPAU    Public Power
Authority
 COP      Certificates of Participation                  PWBL    Public Works Board
Lease
 ED       Economic Development                           RA      Redevelopment
Agency
 FAU      Finance Authority                              RB      Revenue Bonds
 GOB      General Obligation Bonds                       RRB     Revenue Refunding
Bonds
 GORB     General Obligation Refunding Bonds             SCDAU   Statewide
Communities Development Authority
 GOUN     General Obligation Unlimited Nts.              SDI     School District
 HAU      Housing Authority                              SFM     Single Family Mtg.
 HF       Health Facilities                              SPAST   Special Assessment
 HFA      Housing Finance Agency                         SPTX    Special Tax
 HTAU     Highway & Transportation Authority             TXAL    Tax Allocation
 MH       Multifamily Housing                            USD     Unified School
District
 MTAU     Metropolitan Transportation Authority
</TABLE>

1.  Represents  the current  interest  rate for a variable rate bond known as an
"inverse  floater"  which pays  interest  at a rate that varies  inversely  with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income.  Their price may be more volatile than the price of a comparable
fixed-rate  security.  Inverse  floaters  amount to $16,128,362 or 11.58% of the
Fund's net assets as of August 31, 1999.

2. For zero coupon bonds, the interest rate shown is the effective yield on the
date of purchase.

3. Securities with an aggregate market value of $559,992 are held in
collateralized accounts to cover initial margin requirements on open futures
sales contracts. See Note 5 of Notes to Financial Statements.

4. Denotes a step bond: a zero coupon bond that converts to a fixed or variable
interest rate at a designated future date.

5.  Represents   securities  sold  under  Rule  144A,   which  are  exempt  from
registration under the Securities Act of 1933, as amended. These securities have
been  determined  to be  liquid  under  guidelines  established  by the Board of
Directors.  These  securities  amount to  $4,165,800  or 2.99% of the Fund's net
assets as of August 31, 1999.

AS OF AUGUST 31, 1999,  SECURITIES SUBJECT TO THE ALTERNATIVE MINIMUM TAX AMOUNT
TO $34,930,607 OR 25.07% OF THE FUND'S NET ASSETS.

DISTRIBUTION  OF  INVESTMENTS  BY INDUSTRY OF ISSUE,  AS A  PERCENTAGE  OF TOTAL
INVESTMENTS AT VALUE, IS AS FOLLOWS:

<TABLE>
<CAPTION>
 INDUSTRY                                             MARKET VALUE
PERCENT
---------------------------------------------------------------------------------------
<S>                                                   <C>
<C>
 Special Assessment                                  $ 26,947,089
19.6%
 Single Family Housing                                 24,732,266
17.9
 Highways                                              17,351,490
12.6
 General Obligation                                    14,253,636
10.4
 Municipal Leases                                       8,723,894
6.3
 Sales Tax                                              8,056,275
5.9
 Adult Living Facilities                                7,947,877
5.8
 Electric Utilities                                     5,976,498
4.3
 Pollution Control                                      5,115,564
3.7
 Hospital/Healthcare                                    4,810,001
3.5
 Multifamily Housing                                    4,111,302
3.0
 Marine/Aviation Facilities                             3,419,828
2.5
 Water Utilities                                        3,260,820
2.4
 Resource Recovery                                      2,905,844
2.1

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

 Total                                               $137,612,384
100.0%

===================================
</TABLE>



 See accompanying Notes to Financial Statements.

              17 Oppenheimer Main Street California Municipal Fund
<PAGE>


 STATEMENT OF ASSETS AND LIABILITIES  August 31, 1999

<TABLE>
<CAPTION>
==================================================================================================================
 ASSETS

<S>
<C>
 Investments, at value (cost $138,482,564)--see accompanying
statement                              $ 137,612,384
------------------------------------------------------------------------------------------------------------------

Cash
357,087
------------------------------------------------------------------------------------------------------------------
 Receivables and other assets:
 Investments
sold
2,007,893

Interest
1,763,865
 Shares of capital stock
sold
214,653

Other
1,446

--------------------
 Total
assets
141,957,328

==================================================================================================================
 LIABILITIES

 Payables and other liabilities:

 Investments
purchased
1,981,263

Dividends
372,159
 Shares of capital stock
redeemed
213,863
 Shareholder
reports
37,183
 Distribution and service plan
fees                                                                        12,740
 Transfer and shareholder servicing agent
fees                                                              9,707
 Daily variation on futures contracts--Note
5                                                               6,438

Other
18,404

-------------------
 Total
liabilities
2,651,757

==================================================================================================================

 NET
ASSETS
$139,305,571

===================

==================================================================================================================
 COMPOSITION OF NET ASSETS

 Par value of shares of capital
stock                                                                $    114,096
------------------------------------------------------------------------------------------------------------------
 Additional paid-in
capital
140,300,950
------------------------------------------------------------------------------------------------------------------
 Overdistributed net investment
income                                                                   (284,048)
------------------------------------------------------------------------------------------------------------------
 Accumulated net realized loss on investment
transactions                                                 (28,997)
------------------------------------------------------------------------------------------------------------------
 Net unrealized depreciation on investments--Notes 3 and
5                                               (796,430)

-------------------
 Net
assets
$139,305,571

===================

==================================================================================================================
 NET ASSET VALUE PER SHARE

 Class A Shares:
 Net  asset  value and  redemption  price  per  share  (based  on net  assets of
 $109,575,128 and 8,971,989 shares of capital stock
outstanding)                                           $12.21
 Maximum offering price per share (net asset value plus sales charge
 of 4.75% of offering
price)
$12.82
------------------------------------------------------------------------------------------------------------------
 Class B Shares:
 Net asset value,  redemption  price (excludes  applicable  contingent  deferred
 sales charge) and offering  price per share (based on net assets of $29,730,443
 and 2,437,647 shares of capital stock
outstanding)                                                        $12.20


</TABLE>

 See accompanying Notes to Financial Statements.

              18 Oppenheimer Main Street California Municipal Fund
<PAGE>
STATEMENT OF OPERATIONS  For the Year Ended August 31, 1999

<TABLE>
<CAPTION>
<S>                                                                             <C>
===============================================================================================
INVESTMENT INCOME
Interest
$  7,761,775

===============================================================================================
EXPENSES
Management fees--Note
4                                                                770,241
-----------------------------------------------------------------------------------------------
Distribution and service plan fees--Note 4:
Class
B
280,483
-----------------------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees--Note
4                                   80,248
-----------------------------------------------------------------------------------------------
Shareholder
reports                                                                     44,221
-----------------------------------------------------------------------------------------------
Registration and filing fees:
Class
A
11,266
Class
B
4,659
-----------------------------------------------------------------------------------------------
Legal, auditing and other professional
fees                                             11,998
-----------------------------------------------------------------------------------------------
Custodian fees and
expenses                                                              8,823
-----------------------------------------------------------------------------------------------
Insurance
expenses                                                                       2,818
-----------------------------------------------------------------------------------------------
Directors'
compensation                                                                  2,304
-----------------------------------------------------------------------------------------------
Other
2,779

---------------
Total
expenses
1,219,840
Less expenses paid indirectly--Note
1                                                   (8,088)
Less reimbursement of expenses by OppenheimerFunds, Inc.--Note
4                      (210,066)

---------------
Net
expenses
1,001,686
===============================================================================================
NET INVESTMENT
INCOME                                                                6,760,089

===============================================================================================
REALIZED AND UNREALIZED GAIN (LOSS)

Net realized gain (loss) on:
Investments
(235,961)
Closing of futures
contracts                                                           208,713

---------------
Net realized
loss                                                                      (27,248)

-----------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation on investments
(9,255,882)

---------------
Net realized and unrealized loss
(9,283,130)

===============================================================================================
NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS
$(2,523,041)

===============
</TABLE>

See accompanying Notes to Financial Statements.



             19   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>




STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
YEAR ENDED AUGUST 31,
1999            1998
=======================================================================================================
<S>
<C>              <C>
OPERATIONS
Net investment income                                                   $
6,760,089   $   5,785,304
-------------------------------------------------------------------------------------------------------
Net realized loss
(27,248)       (147,181)
-------------------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation
(9,255,882)      4,576,330

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

Net increase (decrease) in net assets resulting from operations
(2,523,041)     10,214,453

=======================================================================================================
DIVIDENDS AND/OR DISTRIBUTIONS TO SHAREHOLDERS

Dividends from net investment income:
Class A
(5,577,537)     (5,113,266)
Class B
(1,114,948)       (736,400)
-------------------------------------------------------------------------------------------------------
Distributions from net realized gain:
Class A
--        (802,490)
Class B
--        (131,382)

=======================================================================================================
CAPITAL STOCK TRANSACTIONS

Net increase in net assets resulting from capital stock transactions--Note 2:
Class A
7,019,301      16,887,977
Class B
8,515,921      10,757,185

=======================================================================================================
NET ASSETS
Total increase
6,319,696      31,076,077
-------------------------------------------------------------------------------------------------------
Beginning of period
132,985,875     101,909,798

--------------------------------
End of period (including overdistributed net investment
income of $284,048 and $351,652, respectively)
$139,305,571    $132,985,875

================================
</TABLE>



See accompanying Notes to Financial Statements.

             20  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>



FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>

Year                    Year

Ended                   Ended

August 31,                June 30,
Class A                                                 1999       1998
1997       1996(1)      1996         1995
=========================================================================================================================
<S>                                                <C>         <C>
<C>        <C>        <C>          <C>
PER SHARE OPERATING DATA

Net asset value, beginning of period                  $13.02      $12.64
$12.16     $12.15      $12.09       $11.82
-------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                    .65         .65
 .73        .12         .73          .73
Net realized and unrealized gain (loss)                 (.82)        .51
 .49        .01         .07          .27

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

Total income (loss) from
investment operations                                   (.17)       1.16
1.22        .13         .80         1.00
-------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                    (.64)       (.67)
(.74)       (.12)       (.73)        (.69)
Dividends in excess of
net investment income                                     --          --
--         --          --         (.04)
Distributions from net realized gain                      --        (.11)
--         --          --           --
Distributions in excess of net realized gain              --          --
--         --        (.01)          --

--------------------------------------------------------------------
Total dividends and distributions
to shareholders                                         (.64)       (.78)
(.74)      (.12)       (.74)        (.73)
-------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                        $12.21      $13.02
$12.64     $12.16      $12.15       $12.09

====================================================================

=========================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                    (1.42)%      9.33%
10.24%      1.12%       6.73%        8.93%

=========================================================================================================================
RATIOS/SUPPLEMENTAL DATA

Net assets, end of period (in thousands)            $109,575    $109,811
$89,991    $76,817     $76,913      $78,134
-------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                   $111,996    $ 99,678
$80,311    $77,584     $78,676      $76,148
-------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                   5.03%       5.04%
5.91%      6.00%       5.99%        6.27%
Expenses, before voluntary assumption
and indirect expenses                                   0.67%       0.69%(4)
0.59%(4)   0.57%(4)    0.58%(4)    0.57%(4)
Expenses, after voluntary assumption
and indirect expenses                                   0.51%       0.53%
N/A       N/A          N/A         N/A
-------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                25%         30%
46%         1%         33%         14%
</TABLE>


1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended August 31, 1999 were $48,357,555 and $35,079,315, respectively.

See accompanying Notes to Financial Statements.

             21  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>

FINANCIAL HIGHLIGHTS Continued


<TABLE>
<CAPTION>

YEAR                    YEAR

ENDED                   ENDED

AUGUST 31,                JUNE 30,
CLASS B                                              1999           1998
1997         1996(1)        1996       1995
----------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>
<C>           <C>           <C>        <C>
PER SHARE OPERATING DATA
Net asset value, beginning of period              $13.01          $12.63
$12.14        $12.14        $12.08     $11.80
----------------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                .53
 .54             .60           .10           .61        .62
Net realized and unrealized gain (loss)             (.83)
 .49             .50            --           .07        .27

--------------------------------------------------------------------------------
Total income (loss) from
investment operations                               (.30)           1.03
1.10           .10           .68        .89
----------------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                (.51)          (.54)
(.61)         (.10)         (.61)      (.57)
Dividends in excess of
net investment income                                 --
--               --            --            --       (.04)
Distributions from net realized gain                  --
(.11)              --            --            --         --
Distributions in excess of net realized gain          --
--               --            --          (.01)        --

--------------------------------------------------------------------------------
Total dividends and distributions
to shareholders                                     (.51)          (.65)
(.61)          (.10)         (.62)      (.61)
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                    $12.20         $13.01
$12.63         $12.14        $12.14     $12.08

================================================================================

==================================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                (2.41)%         8.24%
9.24%          0.85%         5.66%      7.90%

==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)         $29,730        $23,175
$11,919         $5,928        $5,442     $2,648
----------------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                $28,070        $18,087         $
8,129         $5,767        $3,848     $1,904
----------------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                               4.02%          4.19%
4.85%          4.92%         4.94%      5.17%
Expenses, before voluntary assumption
and indirect expenses                               1.67%          1.70%(4)
1.60%(4)       1.62%(4)      1.60%(4)  1.55%(4)
Expenses, after voluntary assumption
and indirect expenses                               1.52%
1.53%             N/A            N/A          N/A        N/A
----------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                            25%
30%             46%             1%           33%       14%
</TABLE>



1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for period of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended August 31, 1999 were $48,357,555 and $35,079,315, respectively.

See accompanying Notes to Financial Statements.

             22  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>
NOTES TO FINANCIAL STATEMENTS

===============================================================================
1. SIGNIFICANT ACCOUNTING POLICIES

Oppenheimer  Main  Street  California  Municipal  Fund (the  Fund) is a separate
series of Oppenheimer Main Street Funds, Inc., an open-end management investment
company  registered  under the Investment  Company Act of 1940, as amended.  The
Fund's investment  objective is to seek as high a level of current income exempt
from federal and California personal income taxes as is available from investing
in  municipal  securities  while  attempting  to  preserve  capital.  The Fund's
investment  advisor is  OppenheimerFunds,  Inc. (the  Manager).  The Fund offers
Class A and  Class B shares.  Class A shares  are sold  with a  front-end  sales
charge on  investments  up to $1  million.  Class B shares  may be  subject to a
contingent  deferred sales charge  (CDSC).  All classes of shares have identical
rights to earnings, assets and voting privileges, except that each class has its
own expenses  directly  attributable  to that class and exclusive  voting rights
with  respect to matters  affecting  that class.  Classes A and B have  separate
distribution and/or service plans. Class B shares will automatically  convert to
Class A shares six years after the date of purchase.  The following is a summary
of significant accounting policies consistently followed by the Fund.

-------------------------------------------------------------------------------
SECURITIES  VALUATION.  Portfolio  securities are valued at the close of the New
York Stock  Exchange on each trading day.  Listed and  unlisted  securities  for
which such  information is regularly  reported are valued at the last sale price
of the day or, in the  absence of sales,  at values  based on the closing bid or
the  last  sale  price  on the  prior  trading  day.  Long-term  and  short-term
"non-money  market" debt  securities are valued by a portfolio  pricing  service
approved by the Board of Directors. Such securities which cannot be valued by an
approved portfolio pricing service are valued using  dealer-supplied  valuations
provided the Manager is satisfied that the firm rendering the quotes is reliable
and  that  the  quotes  reflect  current  market  value,  or  are  valued  under
consistently  applied  procedures  established  by the  Board  of  Directors  to
determine  fair  value  in good  faith.  Short-term  "money  market  type"  debt
securities having a remaining maturity of 60 days or less are valued at cost (or
last  determined  market  value)  adjusted for  amortization  to maturity of any
premium or  discount.  Options are valued  based upon the last sale price on the
principal  exchange  on which the  option is traded  or, in the  absence  of any
transactions  that day, the value is based upon the last sale price on the prior
trading  date if it is within  the  spread  between  the  closing  bid and asked
prices. If the last sale price is outside the spread, the closing bid is used.


             23  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

<PAGE>
Notes to Financial Statements continued

===============================================================================
1. SIGNIFICANT ACCOUNTING POLICIES Continued

ALLOCATION OF INCOME,  EXPENSES,  GAINS AND LOSSES. Income, expenses (other than
those attributable to a specific class), gains and losses are allocated daily to
each  class  of  shares  based  upon  the  relative  proportion  of  net  assets
represented  by  such  class.  Operating  expenses  directly  attributable  to a
specific class are charged against the operations of that class.

-------------------------------------------------------------------------------
FEDERAL  TAXES.  The Fund intends to continue to comply with  provisions  of the
Internal  Revenue Code  applicable  to  regulated  investment  companies  and to
distribute  all of its  taxable  income,  including  any  net  realized  gain on
investments  not  offset by loss  carryovers,  to  shareholders.  Therefore,  no
federal income or excise tax provision is required.

-------------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to
shareholders, which are determined in accordance with income tax regulations,
are recorded on the ex-dividend date.

-------------------------------------------------------------------------------
CLASSIFICATION  OF DISTRIBUTIONS TO SHAREHOLDERS.  Net investment  income (loss)
and net  realized  gain  (loss)  may  differ  for  financial  statement  and tax
purposes.  The  character  of  distributions  made  during  the  year  from  net
investment   income  or  net  realized   gains  may  differ  from  its  ultimate
characterization  for  federal  income  tax  purposes.  Also,  due to  timing of
dividend  distributions,  the fiscal year in which amounts are  distributed  may
differ from the fiscal year in which the income or realized gain was recorded by
the Fund.

-------------------------------------------------------------------------------
EXPENSE OFFSET ARRANGEMENTS. Expenses paid indirectly represent a reduction of
custodian fees for earnings on cash balances maintained by the Fund.

-------------------------------------------------------------------------------
OTHER.  Investment  transactions  are accounted  for as of trade date.  Original
issue  discount is accreted and premium is amortized in accordance  with federal
income tax  requirements.  For municipal bonds acquired after April 30, 1993, on
disposition or maturity,  taxable ordinary income is recognized to the extent of
the lesser of gain or market  discount  that would have accrued over the holding
period. Realized gains and losses on investments and unrealized appreciation and
depreciation are determined on an identified cost basis, which is the same basis
used for federal income tax purposes.

      There are certain  risks  arising  from  geographic  concentration  in any
state.  Certain revenue- or tax-related events in a state may impair the ability
of certain  issuers of municipal  securities  to pay  principal  and interest on
their obligations.

      The  preparation  of financial  statements  in conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements and the reported  amounts of income and expenses during the reporting
period. Actual results could differ from those estimates.



             24  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

<PAGE>

===============================================================================
2. CAPITAL STOCK

The Fund has  authorized  16,250,000  shares of $.01 par value  capital stock of
each class. Transactions in shares of capital stock were as follows:

<TABLE>
<CAPTION>
                           YEAR ENDED AUGUST 31, 1999      YEAR ENDED AUGUST 31,
1998
                           SHARES              AMOUNT      SHARES
AMOUNT
--------------------------------------------------------------------------------------
<S>                         <C>         <C>                <C>          <C>
CLASS A
Sold                         1,681,985   $ 21,674,388       2,165,645    $
27,847,918
Dividends and/or
distributions reinvested       281,702      3,627,456         290,138
3,721,102
Redeemed                    (1,423,149)   (18,282,543)     (1,141,736)
(14,681,043)

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

Net increase                   540,538   $  7,019,301       1,314,047    $
16,887,977

==========================================================
--------------------------------------------------------------------------------------
CLASS B
Sold                           964,557   $ 12,473,622         931,591    $
11,964,499
Dividends and/or
distributions reinvested        59,086        758,691          44,882
575,114
Redeemed                      (367,694)    (4,716,392)       (138,617)
(1,782,428)

----------------------------------------------------------
Net increase                   655,949   $  8,515,921         837,856    $
10,757,185

==========================================================
</TABLE>

===============================================================================
3. UNREALIZED GAINS AND LOSSES ON SECURITIES

As of August 31, 1999, net unrealized depreciation on securities of $870,180 was
composed  of  gross  appreciation  of  $3,223,012,  and  gross  depreciation  of
$4,093,192.

===============================================================================
4. MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES

MANAGEMENT FEES. Management fees paid to the Manager were in accordance with the
investment advisory agreement with the Fund which provides for a fee of 0.55% of
average  annual net assets if the Fund's net assets are $100 million or more (it
is reduced if assets are less). The Manager has voluntarily  undertaken to limit
its fees to 0.40% of average  annual  net  assets if the Fund's  assets are $100
million or more.  The Manager can terminate  that waiver at any time. The Fund's
management  fee for the year ended  August 31, 1999 was 0.40% of average  annual
net assets for each class of shares, after giving affect to the waiver.

-------------------------------------------------------------------------------
TRANSFER AGENT FEES. OppenheimerFunds Services (OFS), a division of the Manager,
is the  transfer  and  shareholder  servicing  agent  for the Fund and for other
Oppenheimer  funds.  OFS's total costs of providing  such services are allocated
ratably to these funds.

-------------------------------------------------------------------------------
DISTRIBUTION  AND SERVICE PLAN FEES. Under its General  Distributor's  Agreement
with the Manager,  the Distributor acts as the Fund's  principal  underwriter in
the continuous public offering of the different classes of shares of the Fund.


             25  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
NOTES TO FINANCIAL STATEMENTS Continued

===============================================================================
4. MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES  CONTINUED

The  compensation  paid to (or  retained  by) the  Distributor  from the sale of
shares or on the redemption of shares is shown in the table below for the period
indicated.

<TABLE>
<CAPTION>
                                     AGGREGATE            CLASS A
COMMISSIONS       COMMISSIONS
                                     FRONT-END          FRONT-END        ON CLASS
A        ON CLASS B
                                 SALES CHARGES      SALES CHARGES
SHARES            SHARES
                                    ON CLASS A        RETAINED BY       ADVANCED
BY       ADVANCED BY
YEAR ENDED                              SHARES        DISTRIBUTOR
DISTRIBUTOR(1)    DISTRIBUTOR(1)
-------------------------------------------------------------------------------------------------------
<S>                                  <C>                <C>
<C>                 <C>
August 31, 1999                       $370,004            $65,422
$27,796          $426,112
</TABLE>

1. The Distributor  advances commission payments to dealers for certain sales of
Class A shares  and for sales of Class B shares  from its own  resources  at the
time of sale.

<TABLE>
<CAPTION>
                                                          CLASS
A                             CLASS B
                                              CONTINGENT DEFERRED
CONTINGENT DEFERRED
                                                    SALES
CHARGES                       SALES CHARGES
YEAR ENDED                                RETAINED BY DISTRIBUTOR
RETAINED BY DISTRIBUTOR
-------------------------------------------------------------------------------------------------------
<S>
<C>                                <C>
August 31, 1999
$4,038                             $95,508
</TABLE>


      The Fund has adopted a  Distribution  and Service  Plan for Class B shares
under Rule 12b-1 of the Investment  Company Act. Under those plans the Fund pays
the  Distributor  for all or a portion of its costs incurred in connection  with
the distribution and/or servicing of the shares of the particular class.

-------------------------------------------------------------------------------
CLASS B DISTRIBUTION  AND SERVICE PLAN FEES.  Under each plan,  service fees and
distribution  fees are  computed on the average of the net asset value of shares
in the respective class, determined as of the close of each regular business day
during the period.  The Class B plan allows the Distributor to be reimbursed for
its services and costs in distributing Class B and servicing accounts.

      The Distributor  retains the  asset-based  sales charge on Class B shares.
The  asset-based  sales charges on Class B shares allow  investors to buy shares
without a front-end  sales charge while  allowing the  Distributor to compensate
dealers that sell those shares.

      The  Distributor's  actual  expenses in selling Class B shares may be more
than the  payments  it  receives  from the  contingent  deferred  sales  charges
collected  on redeemed  shares and from the Fund under the plan.  If the Class B
plan is  terminated  by the Fund,  the Board of Directors  may allow the Fund to
continue  payments  of the  asset-based  sales  charge  to the  Distributor  for
distributing  shares  before the plan was  terminated.  The plan  allows for the
carry-forward of distribution  expenses,  to be recovered from asset-based sales
charges in subsequent fiscal periods.

Distribution  fees paid to the  Distributor  for the year ended  August 31, 1999
were as follows:

<TABLE>
<CAPTION>

DISTRIBUTOR'S     DISTRIBUTOR'S

AGGREGATE      UNREIMBURSED

UNREIMBURSED     EXPENSES AS %
                                TOTAL PAYMENTS    AMOUNT RETAINED
EXPENSES     OF NET ASSETS
                                    UNDER PLAN     BY DISTRIBUTOR        UNDER
PLAN          OF CLASS
------------------------------------------------------------------------------------------------------
<S>                                  <C>                <C>
<C>                   <C>
Class B Plan                          $280,483           $238,366
$1,067,326             3.59%
</TABLE>


             26  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

===============================================================================
5. FUTURES CONTRACTS

The Fund may buy and sell futures  contracts in order to gain  exposure to or to
seek to protect  against  changes in  interest  rates.  The Fund may also buy or
write put or call options on these futures contracts.

      The Fund generally sells futures  contracts to hedge against  increases in
interest  rates and the  resulting  negative  effect on the value of fixed  rate
portfolio  securities.  The Fund may also  purchase  futures  contracts  to gain
exposure  to  changes  in  interest  rates as it may be more  efficient  or cost
effective than actually buying fixed income securities.

      Upon  entering  into a futures  contract,  the Fund is required to deposit
either  cash or  securities  (initial  margin)  in an amount  equal to a certain
percentage of the contract value.  Subsequent  payments  (variation  margin) are
made or received by the Fund each day. The variation  margin  payments are equal
to the daily changes in the contract value and are recorded as unrealized  gains
and losses.  The Fund may recognize a realized gain or loss when the contract is
closed or expires.

      Securities  held  in  collateralized  accounts  to  cover  initial  margin
requirements   on  open  futures   contracts  are  noted  in  the  Statement  of
Investments.  The  Statement  of Assets and  Liabilities  reflects a  receivable
and/or payable for the daily mark to market for variation margin.

      Risks of entering into futures contracts (and related options) include the
possibility  that there may be an illiquid market and that a change in the value
of the  contract or option may not  correlate  with  changes in the value of the
underlying securities.

As of August 31, 1999, the Fund had outstanding futures contracts as follows:

<TABLE>
<CAPTION>
                                                     NUMBER OF        VALUATION AS
OF        UNREALIZED
CONTRACT DESCRIPTION            EXPIRATION DATE      CONTRACTS        AUGUST 31,
1999       APPRECIATION
-----------------------------------------------------------------------------------------------------------
CONTRACTS TO SELL
-----------------
<S>                                   <C>                  <C>
<C>                  <C>
U.S. Treasury Bonds                     9/21/99             40
$4,573,750            $73,750
</TABLE>


===============================================================================
6. BANK BORROWINGS

The Fund may borrow from a bank for temporary or emergency  purposes  including,
without limitation,  funding of shareholder  redemptions provided asset coverage
for  borrowings  exceeds  300%.  The Fund has entered  into an  agreement  which
enables it to participate with other  Oppenheimer  funds in an unsecured line of
credit with a bank, which permits  borrowings up to $400 million,  collectively.
Interest is charged to each fund,  based on its  borrowings,  at a rate equal to
the  Federal  Funds Rate plus 0.35%.  Borrowings  are payable 30 days after such
loan is  executed.  The Fund  also pays a  commitment  fee equal to its pro rata
share of the  average  unutilized  amount of the  credit  facility  at a rate of
0.0575% per annum.

      The Fund had no  borrowings  outstanding  during the year ended August 31,
1999.


             27  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>



<PAGE>


A-1



<PAGE>



A-6

                                   Appendix A

--------------------------------------------------------------------------------
                   MUNICIPAL BOND RATINGS DEFINITIONS
--------------------------------------------------------------------------------

Below are summaries of the rating definitions used by the  nationally-recognized
rating agencies listed below for municipal  securities.  Those ratings represent
the opinion of the agency as to the credit quality of issues that they rate. The
summaries below are based upon  publicly-available  information  provided by the
rating organizations.

                         Moody's Investors Service, Inc.
--------------------------------------------------------------------------------

                            Long-Term Bond Ratings

Aaa: Bonds rated Aaa are judged to be the best quality.  They carry the smallest
degree of investment risk.  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,  the changes that can be expected are
most unlikely to impair the fundamentally strong position of such issues.

Aa: Bonds 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 with Aaa securities or fluctuation of protective  elements may be
of  greater  amplitude  or there may be other  elements  present  which make the
long-term risks appear somewhat larger than those of Aaa securities.

A: Bonds 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 which
suggest a susceptibility to impairment sometime in the future.

Baa: Bonds rated Baa are considered medium grade obligations;  that is, 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 have  speculative
characteristics as well.

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

B:  Bonds  rated B  generally  lack  characteristics  of  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 rated Caa are of poor standing and may be in default or there may be
present elements of danger with respect to principal or interest.

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

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

Con. (...):  Bonds for which the security  depends on the completion of some act
or the  fulfillment of some condition are rated  conditionally.  These bonds are
secured by (a) earnings of projects under construction, (b) earnings of projects
unseasoned in operating  experience,  (c) rentals that begin when facilities are
completed,   or  (d)   payments  to  which  some  other   limitation   attaches.
Parenthetical   rating  denotes  probable  credit  stature  upon  completion  of
construction or elimination of basis of condition.

Moody's  applies  numerical  modifiers  1,  2,  and  3 in  each  generic  rating
classification  from Aa  through  Caa.  The  modifier  "1"  indicates  that  the
obligation ranks in the higher end of its category; the modifier "2" indicates a
mid-range  ranking and the modifier "3"  indicates a ranking in the lower end of
the category.  Advanced  refunded  issues that are secured by certain assets are
identified with a # symbol.

                                                Short-Term Ratings - U.S.
Tax-Exempt Municipals

There are four ratings  below for  short-term  obligations  that are  investment
grade.  Short-term speculative  obligations are designated SG. For variable rate
demand obligations,  a two-component rating is assigned. The first (MIG) element
represents  an  evaluation  by  Moody's of the  degree of risk  associated  with
scheduled  principal and interest  payments,  and the other (VMIG) represents an
evaluation of the degree of risk associated with the demand feature.

MIG 1/VMIG 1: Denotes best quality.  There is strong  protection by  established
cash flows, superior liquidity support or demonstrated broad-based access to the
market for refinancing..

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

MIG 3/VMIG 3: 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: 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: Denotes speculative quality.  Debt instruments in this category lack margins
of protection.


                        Standard & Poor's Rating Services
--------------------------------------------------------------------------------

                            Long-Term Credit Ratings

AAA:  Bonds rated "AAA" have the highest  rating  assigned by Standard & Poor's.
The  obligor's  capacity to meet its financial  commitment on the  obligation is
extremely strong.

AA:  Bonds rated "AA" differ from the highest  rated  obligations  only in small
degree.  The  obligor's  capacity  to  meet  its  financial  commitment  on  the
obligation is very strong.

A: Bonds rated "A" are somewhat more  susceptible to adverse  effects of changes
in  circumstances  and economic  conditions  than  obligations  in  higher-rated
categories.  However, the obligor's capacity to meet its financial commitment on
the obligation is still strong.

BBB: Bonds rated BBB exhibit adequate protection  parameters.  However,  adverse
economic  conditions  or  changing  circumstances  are more  likely to lead to a
weakened  capacity  of the  obligor  to meet  its  financial  commitment  on the
obligation.

Bonds rated BB, B, CCC, CC and C are regarded as having significant  speculative
characteristics. BB indicates the least degree of speculation and C the highest.
While  such   obligations   will  likely  have  some   quality  and   protective
characteristics,  these  may be  outweighed  by  large  uncertainties  or  major
exposures to adverse conditions.

BB: Bonds rated BB are less  vulnerable  to  nonpayment  than other  speculative
issues. However, these face major uncertainties or exposure to adverse business,
financial,  or economic conditions which could lead to the obligor's  inadequate
capacity to meet its financial commitment on the obligation.

B: A bond rated B is more vulnerable to nonpayment than an obligation  rated BB,
but the obligor  currently has the capacity to meet its financial  commitment on
the obligation.

CCC: A bond rated CCC is currently  vulnerable to  nonpayment,  and is dependent
upon favorable business,  financial,  and economic conditions for the obligor to
meet its  financial  commitment  on the  obligation.  In the  event  of  adverse
business,  financial or economic  conditions,  the obligor is not likely to have
the capacity to meet its financial commitment on the obligation.

CC:  An obligation rated CC is currently highly vulnerable to nonpayment.

C: The C rating may used where a  bankruptcy  petition has been filed or similar
action has been taken, but payments on this obligation are being continued.

D: Bonds rated D are in default.  Payments on the  obligation are not being made
on the date due.

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. The
"r" symbol is attached to the ratings of instruments with significant  noncredit
risks.

                                                Short-Term Issue Credit Ratings

A-1: Rated in the highest category. The obligor's capacity to meet its financial
commitment on the obligation is strong.  Within this  category,  a plus (+) sign
designation  indicates the issuer's capacity to meet its financial obligation is
very strong.

A-2:  Obligation is somewhat more  susceptible to the adverse effects of changes
in  circumstances  and economic  conditions  than  obligations  in higher rating
categories.  However, the obligor's capacity to meet its financial commitment on
the obligation is satisfactory.

A-3:  Exhibits  adequate  protection  parameters.   However,   adverse  economic
conditions  or  changing  circumstances  are more  likely to lead to a  weakened
capacity of the obligor to meet its financial commitment on the obligation.

B:  Regarded  as having  significant  speculative  characteristics.  The obligor
currently has the capacity to meet its financial  commitment on the  obligation.
However, it faces major ongoing  uncertainties which could lead to the obligor's
inadequate capacity to meet its financial commitment on the obligation.

C: Currently  vulnerable to nonpayment and is dependent upon favorable business,
financial,  and  economic  conditions  for the  obligor  to meet  its  financial
commitment on the obligation.

D:  In payment default. Payments on the obligation have not been made on the due
date. The rating may also be used if a bankruptcy petition has been filed or
similar actions jeopardize payments on the obligation.

                            Fitch IBCA, Inc.
--------------------------------------------------------------------------------

                            International Long-Term Credit Ratings

Investment Grade:
AAA:  Highest Credit  Quality.  "AAA" ratings  denote the lowest  expectation of
credit risk. They are assigned only in the case of exceptionally strong capacity
for timely payment of financial commitments. This capacity is highly unlikely to
be adversely affected by foreseeable events.

AA: Very High Credit  Quality.  "AA" ratings  denote a very low  expectation  of
credit  risk.  They  indicate  a very  strong  capacity  for  timely  payment of
financial  commitments.   This  capacity  is  not  significantly  vulnerable  to
foreseeable events.

A: High Credit Quality. "A" ratings denote a low expectation of credit risk. The
capacity for timely payment of financial commitments is considered strong. This
capacity may, nevertheless, be more vulnerable to changes in circumstances or in
economic conditions than is the case for higher ratings.

BBB: Good Credit Quality. "BBB" ratings indicate that there is currently a low
expectation of credit risk. The capacity for timely payment of financial
commitments is considered adequate, but adverse changes in circumstances and in
economic conditions are more likely to impair this capacity. This is the lowest
investment-grade category.

Speculative Grade:

BB:  Speculative.  "BB" ratings  indicate that there is a possibility  of credit
risk  developing,  particularly  as the result of adverse  economic  change over
time.  However,  business or  financial  alternatives  may be available to allow
financial commitments to be met.

B: Highly  Speculative.  "B" ratings  indicate that  significant  credit risk is
present,  but a limited  margin of safety  remains.  Financial  commitments  are
currently being met. However,  capacity for continued payment is contingent upon
a sustained, favorable business and economic environment.

CCC,  CC C: High  Default  Risk.  Default is a real  possibility.  Capacity  for
meeting  financial  commitments  is solely  reliant  upon  sustained,  favorable
business or economic developments.  A "CC" rating indicates that default of some
kind appears probable. "C" ratings signal imminent default.

DDD, DD, and D: Default.  Securities are not meeting current obligations and are
extremely speculative. "DDD" designates the highest potential for recovery of
amounts outstanding on any securities involved.

Plus (+) and  minus  (-)  signs  may be  appended  to a rating  symbol to denote
relative status within the rating  category.  Plus and minus signs are not added
to the "AAA" category or to categories below "CCC."

International Short-Term Credit Ratings

F1:  Highest credit quality. Strongest capacity for timely payment. May have an
added "+" to denote exceptionally strong credit feature.

F2:   Good credit quality. A satisfactory capacity for timely payment, but the
margin of safety is not as great as in higher ratings.

F3:   Fair credit quality. Capacity for timely payment is adequate. However,
near-term adverse changes could result in a reduction to non-investment grade.
B:    Speculative. Minimal capacity for timely payment, plus vulnerability to
near-term adverse changes in financial and economic conditions.

C:      High default risk. Default is a real possibility, Capacity for meeting
financial commitments is solely reliant upon a sustained, favorable business and
economic environment.

D:     Default. Denotes actual or imminent payment default.

--------------------------------------------------------------------------------
Duff & Phelps Credit Rating Co. Ratings

Long-Term Debt and Preferred Stock

AAA:  Highest  credit  quality.  The risk  factors  are  negligible,  being only
slightly more than for risk-free U.S. Treasury debt.

AA+, AA, AA-: High credit quality. Protection factors are strong. Risk is modest
but may vary slightly from time to time because of economic conditions.

A+, A & A-: Protection factors are average but adequate.  However,  risk factors
are more variable in periods of greater economic stress.

BBB+,  BBB &  BBB-:  Below  average  protection  factors  but  still  considered
sufficient  for  prudent  investment.  Considerable  variability  in risk during
economic cycles.

BB+, BB & BB-: Below investment grade but deemed likely to meet obligations when
due. Present or prospective  financial protection factors fluctuate according to
industry  conditions.  Overall quality may move up or down frequently within the
category.

B+, B & B-: Below investment grade and possessing risk that obligations will not
be met when due. Financial protection factors will fluctuate widely according to
economic cycles,  industry conditions and/or company fortunes.  Potential exists
for  frequent  changes in the rating  within  this  category or into a higher of
lower rating grade.

CCC: Well below investment-grade securities.  Considerable uncertainty exists as
to timely  payment of  principal,  interest or preferred  dividends.  Protection
factors   are   narrow   and   risk   can  be   substantial   with   unfavorable
economic/industry conditions, and/or with unfavorable company developments.

DD: Defaulted debt obligations. Issuer failed to meet scheduled principal and/or
interest payments.

DP:  Preferred stock with dividend arrearages.

Short-Term Debt:

            High Grade:
D-1+: Highest certainty of timely payment. Safety is just below risk-free U.S.
Treasury short-term debt.

D-1: Very high certainty of timely payment. Risk factors are minor.

D-1-: High certainty of timely payment. Risk factors are very small.


Good Grade:
D-2: Good certainty of timely payment. Risk factors are small.

Satisfactory Grade:
D-3: Satisfactory liquidity and other protection factors qualify issues as to
investment grade. Risk factors are larger and subject to more variation.
Nevertheless, timely payment is expected.

Non-Investment Grade:

D-4:  Speculative  investment  characteristics.  Liquidity is not  sufficient to
insure against disruption in debt service.

Default:
D-5: Issuer failed to meet scheduled principal and/or interest payments.




<PAGE>



B-1

                                   Appendix B

--------------------------------------------------------------------------------
                     Municipal Bond Industry Classifications
--------------------------------------------------------------------------------


Adult Living Facilities
Bond Anticipation Notes
Education
Electric Utilities
Gas Utilities
General Obligation
Higher Education
Highways/Railways
Hospital/Healthcare
Manufacturing, Durable Goods
Manufacturing, Non Durable Goods
Marine/Aviation Facilities
Multi-Family Housing
Municipal Leases
Non Profit  Organization
Parking Fee Revenue
Pollution Control
Resource Recovery
Revenue  Anticipation  Notes
Sales Tax Revenue
Sewer Utilities
Single Family Housing
Special  Assessment
Special Tax
Sports  Facility  Revenue
Student Loans
Tax Anticipation Notes
Tax & Revenue  Anticipation Notes
Telephone Utilities
Water Utilities




<PAGE>


C-13

                                   Appendix C

           OppenheimerFunds Special Sales Charge Arrangements and Waivers

In certain cases,  the initial sales charge that applies to purchases of Class A
shares1 of the  Oppenheimer  funds or the contingent  deferred sales charge that
may apply to Class A, Class B or Class C shares may be waived.2  That is because
of the  economies of sales  efforts  realized by  OppenheimerFunds  Distributor,
Inc.,  (referred  to in this  document as the  "Distributor"),  or by dealers or
other  financial  institutions  that offer  those  shares to certain  classes of
investors.

Not all waivers apply to all funds. For example,  waivers relating to Retirement
Plans do not apply to Oppenheimer municipal funds, because shares of those funds
are not  available  for  purchase  by or on behalf of  retirement  plans.  Other
waivers apply only to shareholders of certain funds.

For the purposes of some of the waivers  described  below and in the  Prospectus
and Statement of Additional Information of the applicable Oppenheimer funds, the
term  "Retirement  Plan"  refers  to the  following  types of  plans:  (7) plans
qualified under Sections 401(a) or 401(k) of the Internal Revenue
         Code,
(8) non-qualified  deferred compensation plans, (9) employee benefit plans3 (10)
Group Retirement  Plans4 (11) 403(b)(7)  custodial plan accounts (12) Individual
Retirement Accounts ("IRAs"), including traditional IRAs, Roth
         IRAs, SEP-IRAs, SARSEPs or SIMPLE plans

The  interpretation  of these  provisions as to the  applicability  of a special
arrangement  or waiver in a  particular  case is in the sole  discretion  of the
Distributor or the transfer agent (referred to in this document as the "Transfer
Agent")  of  the  particular   Oppenheimer   fund.  These  waivers  and  special
arrangements  may be amended or terminated at any time by a particular fund, the
Distributor, and/or OppenheimerFunds,  Inc. (referred to in this document as the
"Manager"). Waivers that apply at the time shares are redeemed must be requested
by the shareholder and/or dealer in the redemption request.

--------------
5.    Certain waivers also apply to Class M shares of Oppenheimer Convertible
   Securities Fund.
6. In the case of Oppenheimer Senior Floating Rate Fund, a  continuously-offered
   closed-end  fund,  references to contingent  deferred  sales charges mean the
   Fund's  Early  Withdrawal   Charges  and  references  to  "redemptions"  mean
   "repurchases" of shares.
7. An "employee  benefit plan" means any plan or arrangement,  whether or not it
   is "qualified" under the Internal Revenue Code, under which Class A shares of
   an  Oppenheimer  fund  or  funds  are  purchased  by  a  fiduciary  or  other
   administrator  for the account of participants  who are employees of a single
   employer or of affiliated employers.  These may include, for example, medical
   savings accounts, payroll deduction plans or similar plans. The fund accounts
   must be registered in the name of the fiduciary or  administrator  purchasing
   the shares for the benefit of participants in the plan.
8. The term  "Group  Retirement  Plan"  means  any  qualified  or  non-qualified
   retirement  plan  for  employees  of a  corporation  or sole  proprietorship,
   members and  employees of a partnership  or  association  or other  organized
   group of persons  (the  members of which may include  other  groups),  if the
   group has made special  arrangements  with the Distributor and all members of
   the group  participating  in (or who are eligible to participate in) the plan
   purchase  Class A shares  of an  Oppenheimer  fund or funds  through a single
   investment dealer,  broker or other financial  institution  designated by the
   group.  Such plans  include 457 plans,  SEP-IRAs,  SARSEPs,  SIMPLE plans and
   403(b) plans other than plans for public  school  employees.  The term "Group
   Retirement Plan" also includes  qualified  retirement plans and non-qualified
   deferred  compensation  plans  and IRAs  that  purchase  Class A shares of an
   Oppenheimer fund or funds through a single investment dealer, broker or other
   financial institution that has made special arrangements with the Distributor
   enabling  those  plans to  purchase  Class A shares  at net  asset  value but
   subject to the Class A contingent deferred sales charge.

I. Applicability of Class A Contingent Deferred Sales Charges in Certain Cases

Purchases of Class A Shares of Oppenheimer Funds That Are Not Subject to Initial
Sales Charge but May Be Subject to the Class A Contingent  Deferred Sales Charge
(unless a waiver applies).

      There is no initial  sales charge on purchases of Class A shares of any of
the Oppenheimer funds in the cases listed below. However, these purchases may be
subject to the Class A contingent  deferred  sales charge if redeemed  within 18
months of the end of the calendar month of their  purchase,  as described in the
Prospectus (unless a waiver described  elsewhere in this Appendix applies to the
redemption).  Additionally,  on shares  purchased  under these  waivers that are
subject to the Class A contingent  deferred sales charge,  the Distributor  will
pay the  applicable  commission  described  in the  Prospectus  under  "Class  A
Contingent  Deferred  Sales  Charge."10  This waiver  provision  applies to:

10 However,  that  commission will not be paid on purchases of shares in amounts
of $1 million or more (including any right of accumulation) by a Retirement Plan
that pays for the purchase with the redemption proceeds of Class C shares of one
or more Oppenheimer funds held by the Plan for more than one year.


|_| Purchases of Class A shares aggregating $1 million or more.

|_|  Purchases  by a Retirement  Plan (other than an IRA or 403(b)(7)  custodial
plan) that:

(4)   buys shares costing $500,000 or more, or
(5)   has, at the time of purchase, 100 or more eligible employees or total plan
         assets of $500,000 or more, or
(6)      certifies  to the  Distributor  that it  projects  to have  annual plan
         purchases of $200,000 or more.
|_|      Purchases  by  an  OppenheimerFunds-sponsored   Rollover  IRA,  if  the
         purchases are made:
(3)      through a broker,  dealer,  bank or registered  investment adviser that
         has made special arrangements with the Distributor for those purchases,
         or
(4)      by a direct rollover of a distribution from a qualified Retirement Plan
         if the  administrator of that Plan has made special  arrangements  with
         the Distributor for those purchases.
|_|      Purchases  of Class A shares by  Retirement  Plans that have any of the
         following record-keeping arrangements:

(4) The record keeping is performed by Merrill Lynch Pierce Fenner & Smith, Inc.
          ("Merrill  Lynch") on a daily valuation basis for the Retirement Plan.
          On  the  date  the  plan  sponsor  signs  the  record-keeping  service
          agreement with Merrill Lynch, the Plan must have $3 million or more of
          its assets  invested in (a) mutual funds,  other than those advised or
          managed by Merrill Lynch Asset  Management,  L.P.  ("MLAM"),  that are
          made available under a Service Agreement between Merrill Lynch and the
          mutual fund's  principal  underwriter  or  distributor,  and (b) funds
          advised or managed  by MLAM (the  funds  described  in (a) and (b) are
          referred to as "Applicable Investments").
(5) The record keeping for the Retirement Plan is performed on a daily valuation
          basis by a record keeper whose  services are provided under a contract
          or arrangement  between the Retirement  Plan and Merrill Lynch. On the
          date the plan sponsor signs the record keeping service  agreement with
          Merrill  Lynch,  the Plan must have $3  million  or more of its assets
          (excluding   assets  invested  in  money  market  funds)  invested  in
          Applicable  Investments.  (6) The record keeping for a Retirement Plan
          is handled  under a service  agreement  with Merrill  Lynch and on the
          date the plan sponsor signs that  agreement,  the Plan has 500 or more
          eligible employees (as determined by the Merrill Lynch plan conversion
          manager). |_| Purchases by a Retirement Plan whose record keeper had a
          cost-allocation  agreement with the Transfer Agent on or before May 1,
          1999.


<PAGE>


             II. Waivers of Class A Sales Charges of Oppenheimer Funds

A.  Waivers of Initial and Contingent Deferred Sales Charges for Certain
Purchasers.

Class A shares purchased by the following investors are not subject to any Class
A sales  charges  (and  no  commissions  are  paid  by the  Distributor  on such
purchases):
|_|       The Manager or its affiliates.
|_|       Present or former officers, directors, trustees and employees (and
          their  "immediate   families")  of  the  Fund,  the  Manager  and  its
          affiliates,  and  retirement  plans  established  by  them  for  their
          employees.  The  term  "immediate  family"  refers  to  one's  spouse,
          children,   grandchildren,   grandparents,   parents,  parents-in-law,
          brothers and sisters, sons- and daughters-in-law,  a sibling's spouse,
          a spouse's siblings,  aunts, uncles, nieces and nephews;  relatives by
          virtue  of  a  remarriage  (step-children,   step-parents,  etc.)  are
          included.
|_|      Registered  management  investment  companies,  or separate accounts of
         insurance  companies  having  an  agreement  with  the  Manager  or the
         Distributor for that purpose.
|_|      Dealers or brokers that have a sales agreement with the Distributor, if
         they purchase shares for their own accounts or for retirement plans for
         their employees.
|_|      Employees and registered representatives (and their spouses) of dealers
         or brokers described above or financial  institutions that have entered
         into sales  arrangements  with such  dealers or brokers  (and which are
         identified as such to the  Distributor)  or with the  Distributor.  The
         purchaser must certify to the  Distributor at the time of purchase that
         the purchase is for the  purchaser's own account (or for the benefit of
         such employee's spouse or minor children).
|_|      Dealers,  brokers,  banks or registered  investment  advisors that have
         entered into an agreement with the Distributor  providing  specifically
         for the use of shares  of the Fund in  particular  investment  products
         made  available  to their  clients.  Those  clients  may be  charged  a
         transaction  fee by  their  dealer,  broker,  bank or  advisor  for the
         purchase or sale of Fund shares.
|_|      Investment  advisors  and  financial  planners who have entered into an
         agreement  for this  purpose  with the  Distributor  and who  charge an
         advisory, consulting or other fee for their services and buy shares for
         their own accounts or the accounts of their clients.
|_|      "Rabbi trusts" that buy shares for their own accounts, if the purchases
         are made through a broker or agent or other financial intermediary that
         has made special arrangements with the Distributor for those purchases.
|_|       Clients of investment  advisors or financial  planners  (that have
          entered into an agreement for this purpose with the  Distributor)  who
          buy shares for their own accounts  may also  purchase  shares  without
          sales charge but only if their accounts are linked to a master account
          of their  investment  advisor  or  financial  planner on the books and
          records of the broker, agent or financial  intermediary with which the
          Distributor  has  made  such  special  arrangements  . Each  of  these
          investors  may be  charged  a fee by the  broker,  agent or  financial
          intermediary for purchasing shares.
|_|      Directors,  trustees, officers or full-time employees of OpCap Advisors
         or its  affiliates,  their  relatives  or any  trust,  pension,  profit
         sharing or other benefit plan which  beneficially owns shares for those
         persons.
|_|      Accounts  for  which  Oppenheimer  Capital  (or its  successor)  is the
         investment   advisor   (the   Distributor   must  be  advised  of  this
         arrangement)  and persons who are  directors or trustees of the company
         or trust which is the beneficial owner of such accounts.
|_|      A unit investment trust that has entered into an appropriate  agreement
         with the Distributor.
|_|      Dealers,  brokers,  banks, or registered  investment advisers that have
         entered  into an  agreement  with the  Distributor  to sell  shares  to
         defined  contribution  employee  retirement plans for which the dealer,
         broker or investment adviser provides administration services.
|-|

<PAGE>


      Retirement Plans and deferred  compensation  plans and trusts used to fund
         those plans (including,  for example,  plans qualified or created under
         sections 401(a),  401(k),  403(b) or 457 of the Internal Revenue Code),
         in each case if those  purchases  are made  through a broker,  agent or
         other financial  intermediary  that has made special  arrangements with
         the Distributor for those purchases.
|_|      A  TRAC-2000  401(k)  plan  (sponsored  by the  former  Quest for Value
         Advisors)  whose Class B or Class C shares of a Former  Quest for Value
         Fund  were  exchanged  for  Class  A  shares  of that  Fund  due to the
         termination  of the Class B and Class C  TRAC-2000  program on November
         24, 1995.
|_|      A qualified  Retirement  Plan that had agreed with the former Quest for
         Value Advisors to purchase  shares of any of the Former Quest for Value
         Funds  at  net  asset  value,  with  such  shares  to be  held  through
         DCXchange,  a sub-transfer  agency mutual fund  clearinghouse,  if that
         arrangement was  consummated and share purchases  commenced by December
         31, 1996.

B.  Waivers of Initial and Contingent Deferred Sales Charges in Certain
Transactions.

Class A shares issued or purchased in the following transactions are not subject
to  sales  charges  (and no  commissions  are  paid by the  Distributor  on such
purchases): |_| Shares issued in plans of reorganization, such as mergers, asset
acquisitions
         and exchange offers, to which the Fund is a party.

|_|   Shares purchased by the reinvestment of dividends or other distributions
         reinvested  from  the  Fund or  other  Oppenheimer  funds  (other  than
         Oppenheimer  Cash  Reserves)  or  unit  investment   trusts  for  which
         reinvestment arrangements have been made with the Distributor.
|_|       Shares purchased  through a broker-dealer  that has entered into a
          special agreement with the Distributor to allow the broker's customers
          to purchase and pay for shares of Oppenheimer funds using the proceeds
          of shares redeemed in the prior 30 days from a mutual fund (other than
          a fund managed by the Manager or any of its  subsidiaries) on which an
          initial  sales charge or  contingent  deferred  sales charge was paid.
          This waiver also applies to shares  purchased by exchange of shares of
          Oppenheimer  Money Market Fund,  Inc. that were purchased and paid for
          in this manner.  This waiver must be requested when the purchase order
          is placed  for shares of the Fund,  and the  Distributor  may  require
          evidence of qualification for this waiver.
|_|      Shares  purchased with the proceeds of maturing  principal units of any
         Qualified Unit Investment Liquid Trust Series.
|_|      Shares   purchased  by  the   reinvestment  of  loan  repayments  by  a
         participant in a Retirement  Plan for which the Manager or an affiliate
         acts as sponsor.

C.  Waivers of the Class A Contingent Deferred Sales Charge for Certain
Redemptions.

The Class A contingent deferred sales charge is also waived if shares that would
otherwise be subject to the contingent deferred sales charge are redeemed in the
following cases:
|_|      To make Automatic Withdrawal Plan payments that are limited annually to
         no more than 12% of the account value adjusted annually.
|_|      Involuntary  redemptions  of shares by operation of law or  involuntary
         redemptions of small  accounts  (please refer to  "Shareholder  Account
         Rules and Policies," in the applicable fund Prospectus).
|_|      For distributions from Retirement Plans, deferred compensation plans or
         other employee benefit plans for any of the following purposes:
(10)        Following  the  death or  disability  (as  defined  in the  Internal
            Revenue  Code)  of the  participant  or  beneficiary.  The  death or
            disability   must  occur   after  the   participant's   account  was
            established.
(11)  To return excess contributions.
(12)  To return contributions made due to a mistake of fact.
(13)  Hardship withdrawals, as defined in the plan.11

11 This provision does not apply to IRAs.

(14)  Under a Qualified Domestic Relations Order, as defined in the Internal
      Revenue  Code,  or, in the case of an IRA, a divorce  or  separation
      agreement described in Section 71(b) of the Internal Revenue Code.
(15) To meet the minimum distribution  requirements of the Internal Revenue
     Code.
(16) To make  "substantially  equal  periodic  payments"  as  described  in
     Section 72(t) of the Internal Revenue Code.
(17)  For loans to participants or beneficiaries.
(18)  Separation from service.12

12 This provision does not apply to 403(b)(7) custodial plans if the participant
is less than age 55, nor to IRAs.

(10)  Participant-directed  redemptions to purchase  shares of a mutual
         fund (other than a fund managed by the Manager or a  subsidiary  of the
         Manager)  if  the  plan  has  made   special   arrangements   with  the
         Distributor.
(11) Plan termination or "in-service  distributions,"  if
         the   redemption    proceeds   are   rolled   over   directly   to   an
         OppenheimerFunds-sponsored IRA.
|_|      For  distributions  from  Retirement  Plans having 500 or more eligible
         employees,  except  distributions  due  to  termination  of  all of the
         Oppenheimer funds as an investment option under the Plan.
|_|      For distributions  from 401(k) plans sponsored by  broker-dealers  that
         have entered into a special  agreement  with the  Distributor  allowing
         this waiver.


        III.  Waivers of Class B and Class C Sales Charges of Oppenheimer Funds

        The Class B and Class C contingent  deferred  sales  charges will not be
    applied to shares  purchased in certain types of transactions or redeemed in
    certain circumstances described below.

A.  Waivers for Redemptions in Certain Cases.

The Class B and Class C  contingent  deferred  sales  charges will be waived for
redemptions of shares in the following cases: |_| Shares redeemed involuntarily,
as described in "Shareholder Account Rules and
         Policies," in the applicable Prospectus.
|_|      Redemptions  from accounts other than  Retirement  Plans  following the
         death or  disability  of the last  surviving  shareholder,  including a
         trustee  of a grantor  trust or  revocable  living  trust for which the
         trustee is also the sole beneficiary. The death or disability must have
         occurred after the account was established, and for disability you must
         provide  evidence  of a  determination  of  disability  by  the  Social
         Security Administration.
|_|      Distributions  from accounts for which the  broker-dealer of record has
         entered into a special  agreement  with the  Distributor  allowing this
         waiver.
|_|      Redemptions  of Class B shares held by  Retirement  Plans whose records
         are  maintained  on a daily  valuation  basis  by  Merrill  Lynch or an
         independent record keeper under a contract with Merrill Lynch.
|_|      Redemptions of Class C shares of Oppenheimer U.S. Government Trust from
         accounts of clients of financial  institutions that have entered into a
         special arrangement with the Distributor for this purpose.
|_|      Redemptions  requested in writing by a Retirement Plan sponsor of Class
         C shares of an  Oppenheimer  fund in amounts of $1 million or more held
         by the  Retirement  Plan for  more  than one  year,  if the  redemption
         proceeds  are  invested  in Class A shares  of one or more  Oppenheimer
         funds.
|_|      Distributions from Retirement Plans or other employee benefit plans for
         any of the following purposes:
(14)            Following  the death or  disability  (as defined in the Internal
                Revenue Code) of the  participant or  beneficiary.  The death or
                disability  must  occur  after  the  participant's  account  was
                established in an Oppenheimer fund.
(15)  To return excess contributions made to a participant's account.
(16)  To return contributions made due to a mistake of fact.
(17)  To make hardship withdrawals, as defined in the plan.13

13 This provision does not apply to IRAs.

(18) To make  distributions  required under a Qualified  Domestic Relations
     Order  or,  in the  case of an  IRA,  a  divorce  or  separation  agreement
     described in Section 71(b) of the Internal Revenue Code.
(19) To meet the minimum distribution  requirements of the Internal Revenue
     Code.
(20) To make  "substantially  equal  periodic  payments"  as  described  in
     Section 72(t) of the Internal Revenue Code.
(21)  For loans to participants or beneficiaries.14


14 This provision does not apply to loans from 403(b)(7) custodial plans.

(22)  On account of the participant's separation from service.15
15 This provision does not apply to 403(b)(7) custodial plans if the participant
is less than age 55, nor to IRAs.


(23)            Participant-directed  redemptions to purchase shares of a mutual
                fund (other than a fund  managed by the Manager or a  subsidiary
                of the Manager) offered as an investment  option in a Retirement
                Plan  if  the  plan  has  made  special  arrangements  with  the
                Distributor.
(24)            Distributions   made  on  account  of  a  plan   termination  or
                "in-service"  distributions,"  if the  redemption  proceeds  are
                rolled over directly to an OppenheimerFunds-sponsored IRA.
(25)            Distributions  from Retirement Plans having 500 or more eligible
                employees,  but  excluding  distributions  made  because  of the
                Plan's  elimination as investment  options under the Plan of all
                of the Oppenheimer funds that had been offered.
(26)            For  distributions   from  a  participant's   account  under  an
                Automatic  Withdrawal Plan after the participant  reaches age 59
                1/2, as long as the aggregate  value of the  distributions  does
                not exceed 10% of the account's value, adjusted annually.
(27)            Redemptions of Class B shares under an Automatic Withdrawal Plan
                for an account  other than a Retirement  Plan,  if the aggregate
                value  of  the  redeemed  shares  does  not  exceed  10%  of the
                account's value, adjusted annually.
         |_|Redemptions  of Class B shares or Class C shares  under an Automatic
            Withdrawal  Plan from an account other than a Retirement Plan if the
            aggregate  value of the  redeemed  shares does not exceed 10% of the
            account's value annually.

B.  Waivers for Shares Sold or Issued in Certain Transactions.

The  contingent  deferred  sales  charge  is also  waived on Class B and Class C
shares sold or issued in the following  cases: |_| Shares sold to the Manager or
its affiliates.
|_|      Shares sold to registered  management  investment companies or separate
         accounts of insurance companies having an agreement with the Manager or
         the Distributor for that purpose.
|_| Shares issued in plans of  reorganization  to which the Fund is a party. |_|
Shares sold to present or former officers, directors, trustees or employees
        (and their "immediate families" as defined above in Section I.A.) of the
        Fund, the Manager and its affiliates and retirement plans established by
         them for their employees.

IV. Special Sales Charge  Arrangements for  Shareholders of Certain  Oppenheimer
          Funds Who Were Shareholders of Former Quest for Value Funds

The initial and contingent  deferred sales charge rates and waivers for Class A,
Class  B and  Class  C  shares  described  in the  Prospectus  or  Statement  of
Additional  Information of the Oppenheimer funds are modified as described below
for certain  persons who were  shareholders of the former Quest for Value Funds.
To be eligible,  those persons must have been shareholders on November 24, 1995,
when OppenheimerFunds,  Inc. became the investment advisor to those former Quest
for Value Funds. Those funds include:



<PAGE>


  Oppenheimer Quest Value Fund, Inc.    Oppenheimer   Quest   Small   Cap
                                        Value Fund
  Oppenheimer Quest Balanced Value Fund Oppenheimer  Quest  Global  Value
                                      Fund
  Oppenheimer  Quest  Opportunity Value
  Fund

      These  arrangements also apply to shareholders of the following funds when
they merged (were  reorganized)  into various  Oppenheimer funds on November 24,
1995:

  Quest   for  Value   U.S.   Government Quest for  Value  New York  Tax-Exempt
Income Fund                              Fund
  Quest  for  Value  Investment  Quality Quest  for Value  National  Tax-Exempt
Income Fund                              Fund
  Quest for Value Global Income Fund     Quest for Value California  Tax-Exempt
                                      Fund

      All of the funds  listed  above are  referred  to in this  Appendix as the
"Former Quest for Value Funds." The waivers of initial and  contingent  deferred
sales charges  described in this Appendix apply to shares of an Oppenheimer fund
that are either:
|_|      acquired  by such  shareholder  pursuant to an exchange of shares of an
         Oppenheimer fund that was one of the Former Quest for Value Funds or
|_|      purchased  by  such  shareholder  by  exchange  of  shares  of  another
         Oppenheimer  fund that were  acquired  pursuant to the merger of any of
         the Former  Quest for Value Funds into that other  Oppenheimer  fund on
         November 24, 1995.

A.  Reductions or Waivers of Class A Sales Charges.

      |X| Reduced  Class A Initial  Sales Charge Rates for Certain  Former Quest
for Value Funds Shareholders.

Purchases by Groups and Associations. The following table sets forth the initial
sales  charge rates for Class A shares  purchased  by members of  "Associations"
formed for any purpose other than the purchase of  securities.  The rates in the
table apply if that Association  purchased shares of any of the Former Quest for
Value Funds or received a proposal to purchase such shares from OCC Distributors
prior to November 24, 1995.

--------------------------------------------------------------------------------
                           Initial Sales Initial Sales
 Number of Eligible   Charge as a % of    Charge as a % of    Commission as %
Employees or Members   Offering Price    Net Amount Invested of Offering Price
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
9 or Fewer                  2.50%               2.56%              2.00%
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
At  least 10 but not        2.00%               2.04%              1.60%
more than 49
--------------------------------------------------------------------------------



<PAGE>


      For  purchases by  Associations  having 50 or more  eligible  employees or
members,  there is no initial  sales charge on purchases of Class A shares,  but
those  shares  are  subject  to the Class A  contingent  deferred  sales  charge
described in the applicable fund's Prospectus.

      Purchases made under this arrangement  qualify for the lower of either the
sales charge rate in the table based on the number of members of an Association,
or the sales charge rate that applies under the Right of Accumulation  described
in the applicable  fund's  Prospectus  and Statement of Additional  Information.
Individuals who qualify under this arrangement for reduced sales charge rates as
members  of  Associations  also may  purchase  shares  for their  individual  or
custodial  accounts at these  reduced  sales charge  rates,  upon request to the
Distributor.

      |X| Waiver of Class A Sales  Charges  for  Certain  Shareholders.  Class A
shares  purchased  by the  following  investors  are not  subject to any Class A
initial or contingent deferred sales charges:
|_|      Shareholders  who  were  shareholders  of the AMA  Family  of  Funds on
         February  28, 1991 and who  acquired  shares of any of the Former Quest
         for Value Funds by merger of a portfolio of the AMA Family of Funds.
|_|      Shareholders  who acquired shares of any Former Quest for Value Fund by
         merger of any of the portfolios of the Unified Funds.

      |X|  Waiver  of  Class A  Contingent  Deferred  Sales  Charge  in  Certain
Transactions.  The Class A  contingent  deferred  sales charge will not apply to
redemptions  of Class A shares  purchased by the  following  investors  who were
shareholders of any Former Quest for Value Fund:

      Investors  who  purchased  Class A shares from a dealer that is or was not
permitted  to receive a sales load or  redemption  fee imposed on a  shareholder
with  whom  that  dealer  has  a  fiduciary  relationship,  under  the  Employee
Retirement Income Security Act of 1974 and regulations adopted under that law.

B.  Class A, Class B and Class C Contingent Deferred Sales Charge Waivers.

      |X| Waivers for Redemptions of Shares Purchased Prior to March 6, 1995. In
the following  cases,  the  contingent  deferred sales charge will be waived for
redemptions  of Class A, Class B or Class C shares of an  Oppenheimer  fund. The
shares must have been  acquired  by the merger of a Former  Quest for Value Fund
into the fund or by exchange  from an  Oppenheimer  fund that was a Former Quest
for Value Fund or into  which  such fund  merged.  Those  shares  must have been
purchased prior to March 6, 1995 in connection with:
|_|      withdrawals  under an  automatic  withdrawal  plan  holding only either
         Class B or Class C shares if the annual  withdrawal does not exceed 10%
         of the initial value of the account value, adjusted annually, and
|_|      liquidation of a shareholder's account if the aggregate net asset value
         of shares held in the account is less than the required  minimum  value
         of such accounts.

      |X| Waivers for Redemptions of Shares  Purchased on or After March 6, 1995
but Prior to November 24, 1995. In the following cases, the contingent  deferred
sales  charge  will be waived  for  redemptions  of Class A,  Class B or Class C
shares of an Oppenheimer  fund. The shares must have been acquired by the merger
of a  Former  Quest  for  Value  Fund  into  the  fund  or by  exchange  from an
Oppenheimer  fund  that was a Former  Quest For Value  Fund or into  which  such
Former Quest for Value Fund merged.  Those shares must have been purchased on or
after March 6, 1995, but prior to November 24, 1995:
|_|   redemptions following the death or disability of the shareholder(s) (as
         evidenced by a determination of total disability by the U.S. Social
         Security Administration);
|_|      withdrawals under an automatic withdrawal plan (but only for Class B or
         Class C shares) where the annual  withdrawals  do not exceed 10% of the
         initial value of the account value; adjusted annually, and
|-|

<PAGE>


      liquidation of a shareholder's account if the aggregate net asset value of
         shares held in the account is less than the  required  minimum  account
         value.

      A shareholder's account will be credited with the amount of any contingent
deferred  sales charge paid on the redemption of any Class A, Class B or Class C
shares of the  Oppenheimer  fund  described  in this section if the proceeds are
invested  in the same Class of shares in that fund or another  Oppenheimer  fund
within 90 days after redemption.


    V. Special Sales Charge Arrangements for Shareholders of Certain Oppenheimer
    Funds Who Were Shareholders of Connecticut Mutual Investment Accounts, Inc.

The initial and  contingent  deferred  sale charge rates and waivers for Class A
and Class B shares described in the respective  Prospectus (or this Appendix) of
the  following  Oppenheimer  funds  (each is  referred  to as a  "Fund"  in this
section):
o     Oppenheimer U. S. Government Trust,
o     Oppenheimer Bond Fund,
o     Oppenheimer Disciplined Value Fund and
o     Oppenheimer Disciplined Allocation Fund
are  modified  as  described  below  for  those  Fund   shareholders   who  were
shareholders  of the  following  funds  (referred to as the "Former  Connecticut
Mutual  Funds")  on  March 1,  1996,  when  OppenheimerFunds,  Inc.  became  the
investment adviser to the Former Connecticut Mutual Funds:

  Connecticut Mutual Liquid Account        Connecticut   Mutual   Total   Return
                                            Account
  Connecticut Mutual Government Securities CMIA  LifeSpan  Capital  Appreciation
Account                                     Account
  Connecticut Mutual Income Account         CMIA LifeSpan Balanced Account
  Connecticut Mutual Growth Account         CMIA Diversified Income Account

A.  Prior Class A CDSC and Class A Sales Charge Waivers.

      |_| Class A Contingent  Deferred Sales Charge.  Certain  shareholders of a
Fund and the other Former  Connecticut  Mutual Funds are entitled to continue to
make additional purchases of Class A shares at net asset value without a Class A
initial  sales  charge,  but subject to the Class A  contingent  deferred  sales
charge that was in effect  prior to March 18,  1996 (the "prior  Class A CDSC").
Under the prior Class A CDSC,  if any of those  shares are  redeemed  within one
year of purchase, they will be assessed a 1% contingent deferred sales charge on
an amount equal to the current  market value or the original  purchase  price of
the shares  sold,  whichever  is smaller  (in such  redemptions,  any shares not
subject to the prior Class A CDSC will be redeemed first).

      Those  shareholders  who are  eligible for the prior Class A CDSC are: (3)
persons whose purchases of Class A shares of a Fund and other Former
         Connecticut  Mutual Funds were  $500,000  prior to March 18, 1996, as a
         result of direct purchases or purchases pursuant to the Fund's policies
         on Combined  Purchases or Rights of Accumulation,  who still hold those
         shares in that Fund or other Former Connecticut Mutual Funds, and
(4)      persons whose intended purchases under a Statement of Intention entered
         into prior to March 18, 1996,  with the former  general  distributor of
         the  Former  Connecticut  Mutual  Funds to  purchase  shares  valued at
         $500,000  or more over a  13-month  period  entitled  those  persons to
         purchase shares at net asset value without being subject to the Class A
         initial sales charge.


<PAGE>


      Any of the  Class A shares  of a Fund  and the  other  Former  Connecticut
Mutual  Funds that were  purchased  at net asset value prior to March 18,  1996,
remain  subject  to the prior  Class A CDSC,  or if any  additional  shares  are
purchased by those  shareholders at net asset value pursuant to this arrangement
they will be subject to the prior Class A CDSC.

      |_| Class A Sales Charge Waivers.  Additional Class A shares of a Fund may
be purchased without a sales charge, by a person who was in one (or more) of the
categories  below and acquired Class A shares prior to March 18, 1996, and still
holds Class A shares:
(7)      any purchaser,  provided the total initial amount  invested in the Fund
         or any one or more  of the  Former  Connecticut  Mutual  Funds  totaled
         $500,000 or more,  including  investments made pursuant to the Combined
         Purchases,  Statement of Intention and Rights of Accumulation  features
         available at the time of the initial  purchase and such  investment  is
         still held in one or more of the Former  Connecticut  Mutual Funds or a
         Fund into which such Fund merged;
(8)      any  participant in a qualified  plan,  provided that the total initial
         amount  invested  by the  plan  in the  Fund  or any one or more of the
         Former Connecticut Mutual Funds totaled $500,000 or more;
(9)   Directors of the Fund or any one or more of the Former Connecticut Mutual
         Funds and members of their immediate families;
(10)  employee benefit plans sponsored by Connecticut Mutual Financial Services,
         L.L.C. ("CMFS"), the prior distributor of the Former Connecticut Mutual
         Funds, and its affiliated companies;
(11)     one or more  members of a group of at least 1,000  persons (and persons
         who are  retirees  from  such  group)  engaged  in a  common  business,
         profession,  civic or charitable  endeavor or other  activity,  and the
         spouses and minor  dependent  children of such  persons,  pursuant to a
         marketing program between CMFS and such group; and
(12)     an  institution  acting as a fiduciary  on behalf of an  individual  or
         individuals,  if  such  institution  was  directly  compensated  by the
         individual(s)  for  recommending the purchase of the shares of the Fund
         or any one or more of the Former Connecticut Mutual Funds, provided the
         institution had an agreement with CMFS.

      Purchases  of Class A shares  made  pursuant  to (1) and (2)  above may be
subject to the Class A CDSC of the Former  Connecticut  Mutual  Funds  described
above.

      Additionally,  Class A shares of a Fund may be  purchased  without a sales
charge by any holder of a variable  annuity contract issued in New York State by
Connecticut  Mutual Life Insurance Company through the Panorama Separate Account
which is beyond the  applicable  surrender  charge  period and which was used to
fund a qualified plan, if that holder  exchanges the variable  annuity  contract
proceeds to buy Class A shares of the Fund.

B.  Class A and Class B Contingent Deferred Sales Charge Waivers.

In addition to the waivers  set forth in the  Prospectus  and in this  Appendix,
above,  the contingent  deferred sales charge will be waived for  redemptions of
Class A and Class B shares of a Fund and  exchanges of Class A or Class B shares
of a Fund into  Class A or Class B shares of a Former  Connecticut  Mutual  Fund
provided  that  the  Class A or Class B shares  of the  Fund to be  redeemed  or
exchanged  were (i)  acquired  prior to March 18, 1996 or (ii) were  acquired by
exchange from an  Oppenheimer  fund that was a Former  Connecticut  Mutual Fund.
Additionally,  the shares of such Former  Connecticut Mutual Fund must have been
purchased prior to March 18, 1996: (10) by the estate of a deceased shareholder;
(11) upon the disability of a shareholder, as defined in Section 72(m)(7) of the
         Internal Revenue Code;
(12)     for   retirement   distributions   (or   loans)  to   participants   or
         beneficiaries  from retirement plans qualified under Sections 401(a) or
         403(b)(7)of the Code, or from IRAs, deferred compensation plans created
         under Section 457 of the Code, or other employee benefit plans;
(13)  as tax-free returns of excess contributions to such retirement or employee
         benefit plans;
(14)     in whole or in part,  in  connection  with  shares  sold to any  state,
         county,  or city, or any  instrumentality,  department,  authority,  or
         agency thereof,  that is prohibited by applicable  investment laws from
         paying a sales charge or commission in connection  with the purchase of
         shares of any registered investment management company;
(15)     in  connection  with  the  redemption  of  shares  of the Fund due to a
         combination  with  another  investment  company  by virtue of a merger,
         acquisition or similar reorganization transaction;
(16)     in connection  with the Fund's right to  involuntarily  redeem or
         liquidate the Fund;
(17)     in connection with automatic  redemptions of Class A shares and Class B
         shares in certain  retirement  plan  accounts  pursuant to an Automatic
         Withdrawal  Plan but limited to no more than 12% of the original  value
         annually; or
(18)     as  involuntary  redemptions  of shares by  operation  of law, or under
         procedures  set forth in the Fund's  Articles of  Incorporation,  or as
         adopted by the Board of Directors of the Fund.


               VI. Special Reduced Sales Charge for Former Shareholders of
                           Advance America Funds, Inc.

        Shareholders  of  Oppenheimer  Municipal  Bond  Fund,  Oppenheimer  U.S.
    Government Trust,  Oppenheimer  Strategic Income Fund and Oppenheimer Equity
    Income Fund who acquired  (and still hold) shares of those funds as a result
    of the  reorganization  of series of Advance America Funds,  Inc. into those
    Oppenheimer  funds on  October  18,  1991,  and who held  shares of  Advance
    America Funds,  Inc. on March 30, 1990, may purchase Class A shares of those
    four Oppenheimer funds at a maximum sales charge rate of 4.50%.


            VII.  Sales Charge Waivers on Purchases of Class M Shares of
                     Oppenheimer Convertible Securities Fund

Oppenheimer  Convertible  Securities  Fund  (referred  to as the  "Fund" in this
section)  may sell Class M shares at net asset value  without any initial  sales
charge to the classes of investors  listed  below who,  prior to March 11, 1996,
owned shares of the Fund's  then-existing Class A and were permitted to purchase
those shares at net asset value without sales charge:
|_|   the Manager and its affiliates,
|_|      present or former  officers,  directors,  trustees and  employees  (and
         their  "immediate  families"  as  defined in the  Fund's  Statement  of
         Additional  Information)  of the Fund, the Manager and its  affiliates,
         and  retirement  plans  established  by  them or the  prior  investment
         advisor of the Fund for their employees,
|_|      registered  management  investment  companies  or separate  accounts of
         insurance  companies  that  had an  agreement  with  the  Fund's  prior
         investment advisor or distributor for that purpose,
|_|      dealers or brokers that have a sales agreement with the Distributor, if
         they purchase shares for their own accounts or for retirement plans for
         their employees,
|_|      employees and registered representatives (and their spouses) of dealers
         or brokers described in the preceding section or financial institutions
         that have entered into sales arrangements with those dealers or brokers
         (and  whose  identity  is made  known to the  Distributor)  or with the
         Distributor,  but only if the purchaser certifies to the Distributor at
         the time of purchase that the purchaser meets these qualifications,
|_|      dealers,  brokers,  or registered  investment advisors that had entered
         into an agreement with the Distributor or the prior  distributor of the
         Fund  specifically  providing for the use of Class M shares of the Fund
         in specific investment products made available to their clients, and
|_|      dealers,  brokers or  registered  investment  advisors that had entered
         into an agreement  with the  Distributor  or prior  distributor  of the
         Fund's  shares  to  sell  shares  to  defined   contribution   employee
         retirement plans for which the dealer,  broker,  or investment  advisor
         provides administrative services.
|-|

<PAGE>


56


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Oppenheimer Main Street California Municipal Fund
--------------------------------------------------------------------------------

Internet Web Site:
      www.oppenheimerfunds.com

Investment Adviser
      OppenheimerFunds, Inc.
      Two World Trade Center
      New York, New York 10048-0203

Distributor
      OppenheimerFunds Distributor, Inc.
      Two World Trade Center
      New York, New York 10048-0203

Transfer Agent
      OppenheimerFunds Services
      P.O. Box 5270
      Denver, Colorado 80217
      1-800-525-7048

Custodian Bank
      The Bank of New York
      One Wall Street
      New York, New York 10015

Independent Auditors
      Deloitte & Touche LLP
      555 Seventeenth Street, Suite 3600
      Denver, Colorado 80202-3942

Legal Counsel
      Myer, Swanson, Adams & Wolf, P.C.
      1600 Broadway
      Denver, Colorado 80202

890


PX725.001.1299



<PAGE>

At a meeting held on February 29,  2000,  the Board of Directors of  Oppenheimer
Main  Street  Funds,  Inc.  on  behalf of  Oppenheimer  Main  Street  California
Municipal Fund approved a  reorganization  transaction that will, if approved by
shareholders,  result in the  transfer  of the net  assets of  Oppenheimer  Main
Street California  Municipal Fund to Oppenheimer  California  Municipal Fund, in
exchange for an equal value of shares of Oppenheimer  California Municipal Fund.
The shares of Oppenheimer  California Municipal Fund will then be distributed to
Oppenheimer Main Street  California  Municipal Fund shareholders and Oppenheimer
Main  Street  California  Municipal  Fund  will be  liquidated.  The  pro  forma
financial  statements  reflect the (i) Combined  Statement of  Investments as of
March 31, 2000;  (ii) Combined  Statements of Assets and Liabilities as of March
31, 2000;  and (iii)  Combined  Statements  of Operations  for the  twelve-month
period ended March 31, 2000.

<TABLE>
<CAPTION>

Pro  Forma  Combining  Statements  of Assets  and  Liabilities  March  31,  2000
(Unaudited)  Oppenheimer  California  Municipal Fund and Oppenheimer Main Street
California Municipal Fund


Pro Forma
                                                       Oppenheimer
Oppenheimer                               Combined
                                                       California         Main
Street                               Oppenheimer
                                                       Municipal        California
Municipal       ProForma         California
                                                          Fund              Fund
(1)               Adjustments      Municipal Fund

-------------------------------------------------------------------------------
ASSETS:
<S>                                                     <C>
<C>                 <C>                <C>
Investments, at value (cost * )                         $393,407,508
$125,071,737                           $ 518,479,245

Cash                                                         190,881
379,220                                 570,101
Unrealized appreciation on forward foreign
Receivables:
   Interest, dividends and principal paydowns              5,078,373
1,687,310                               6,765,683
   Investments sold
2,256,986                     -                               2,256,986
   Shares of beneficial interest or capital stock
         sold                                                208,013
216,019                                 424,032
Other
22,049                 6,276                                  28,325

-------------------------------------------------------------------------------
  Total assets                                          $401,163,810
$127,360,562                           $ 528,524,372

-------------------------------------------------------------------------------
LIABILITIES:
Payables and other liabilities:
   Investments purchased                                   7,819,534
3,540,748                            $ 11,360,282
   Dividends                                               1,206,359
386,949                               1,593,308
   Shares of beneficial interest or capital stock
         redeemed
474,232                     -                                 474,232
   Distributions and service plan fees                       237,029
16,755                                 253,784
   Trustees' and Directors' fees
158,303                   624                                 158,927
   Daily variation on futures contracts                      119,281
27,500                                 146,781
   Shareholder reports                                        48,717
31,818                                  80,535
   Transfer and shareholder servicing agent fees              26,527
11,355                                  37,882
   Custodian fees
160                   123                                     283
   Other
13,228                 4,117                                  17,345

-------------------------------------------------------------------------------
      Total liabilities                                   10,103,370
4,019,989                              14,123,359

-------------------------------------------------------------------------------
NET ASSETS                                              $391,060,440
$123,340,573                           $ 514,401,013

===============================================================================
COMPOSITION OF NET ASSETS:
Paid-in capital
407,326,828                     -        128,470,56(1)        535,797,392
Par value of shares of capital stock
103,829         (103,829)(1)                  -
Additional paid-in capital
128,366,735        (128,366,7(1)                  -
Undistributed net investment income                       (1,076,235)
(206,259)                             (1,282,494)
Accumulated net realized loss from investments and
   foreign currency transactions                         (20,750,041)
(4,902,157)                            (25,652,198)
Net unrealized appreciation (depreciation)on
   investments and translation of assets and
   liabilities denominated in foreign currencies           5,559,888
(21,575)                              5,538,313

-------------------------------------------------------------------------------
NET ASSETS                                             $ 391,060,440         $
123,340,573              $ -          $ 514,401,013

===============================================================================

</TABLE>


(1) Represents the conversion from par value shares to no par value shares.

<PAGE>
<TABLE>
<CAPTION>

Pro Forma Combining Statements of Assets and Liabilities March 31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund


Pro Forma
                                                       Oppenheimer
Oppenheimer                               Combined
                                                       California         Main
Street                               Oppenheimer
                                                       Municipal        California
Municipal       ProForma         California
                                                          Fund              Fund
(1)               Adjustments      Municipal Fund

-----------------------------------------------------------------------------
<S>                                                     <C>
<C>                                     <C>
Net Asset Value Per Share
Class A Shares:
Net  asset  value  and  redemption  price  per  share  (based  on net  assets of
$270,100,269,   $97,049,913  and  $367,150,182  and  27,079,405,  8,167,937  and
36,813,599  shares of  beneficial  interest or capital  shares  outstanding  for
Oppenheimer  California  Municipal  Fund,  Oppenheimer  Main  Street  California
Municipal Fund and Combined Oppenheimer California
Municipal Fund, respectively)                                  $9.97
$11.88                                   $9.97

Maximum offering price per share (net asset value
plus sales charge of 4.75% of offering price)                 $10.47
$12.47                                  $10.47

Class B Shares:
Net  asset  value  and  redemption  price  per  share  (based  on net  assets of
$107,306,479,   $26,290,660  and  $133,597,139  and  10,754,056,  2,214,930  and
13,388,391  shares of  beneficial  interest or capital  shares  outstanding  for
Oppenheimer  California  Municipal  Fund,  Oppenheimer  Main  Street  California
Municipal Fund and Combined Oppenheimer California
Municipal Fund, respectively)                                  $9.98
$11.87                                   $9.98

Class C Shares:
Net  asset  value  and  redemption  price  per  share  (based  on net  assets of
$13,653,692 and 1,370,697 shares of beneficial interest outstanding)
$9.96                 $9.96                                     n/a


*Cost                                                   $387,044,745
$124,908,124                            $511,952,869

</TABLE>




(1)    Oppenheimer Main Street California  Municipal Fund Class A shares will be
       exchanged for Oppenheimer California Municipal Fund Class A shares.

       Oppenheimer Main Street California  Municipal Fund Class B shares will be
       exchanged for Oppenheimer California Municipal Fund Class B shares.
<PAGE>
<TABLE>
<CAPTION>

Pro Forma Combining Statements of Operations For The Twelve Months Ended March 31,
2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund


Pro Forma
                                                       Oppenheimer
Oppenheimer                                Combined
                                                       California         Main
Street                                Oppenheimer
                                                       Municipal        California
Municipal       ProForma          California
                                                          Fund              Fund
(1)               Adjustments       Municipal Fund

-------------------------------------------------------------------------------
INVESTMENT INCOME:
<S>                                                     <C>
<C>                 <C>                <C>
Interest                                                $ 26,735,852           $
8,063,227                            $ 34,799,079
Dividends
-                     -                                       -

-------------------------------------------------------------------------------
   Total income                                           26,735,852
8,063,227                -             34,799,079

-------------------------------------------------------------------------------
EXPENSES:
Management fees                                            2,445,236
544,600         (105,903)(1)          2,883,933
Distribution and service plan fees:
Class A
724,763                     -          266,705 (2)            724,763
Class B                                                    1,247,008
291,271                               1,538,279
Class C
156,464                     -                                 156,464
Transfer and shareholder servicing agent fees                237,479
75,040                                 312,519
Shareholder reports                                          112,641
43,003          (32,301)(3)            123,343
Custodian fees and expenses
48,064                   548                                  48,612
Registration and filing fees
3,669                 9,056           32,562 (4)             45,287
Legal and auditing fees                                       35,286
11,844          (11,844)(5)             35,286
Trustees' or Directors' fees and expenses
27,431                 2,814                                  30,245
Other
13,209                 4,186                                  17,395

-------------------------------------------------------------------------------
   Total expenses                                          5,051,250
982,362          149,219              6,182,831

-------------------------------------------------------------------------------
NET INVESTMENT INCOME                                     21,684,602
7,080,865         (149,219)            28,616,248

-------------------------------------------------------------------------------
REALIZED AND UNREALIZED GAIN (LOSS):
Net realized gain (loss) from:
   Investments                                           (21,536,493)
(5,105,354)                            (26,641,847)
   Closing of futures contracts                             (691,062)
(37,554)                               (728,616)
   Closing and expiration of options written
-                     -                                       -
   Foreign currency transactions
-                     -                                       -

-------------------------------------------------------------------------------
Net realized loss                                        (22,227,555)
(5,142,908)               -            (27,370,463)

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

Net change in unrealized appreciation or depreciation on:
  Investments                                            (24,929,616)
(7,803,951)                            (32,733,567)
  Translation of assets and liabilities denominated
      in foreign currencies
-                     -                                       -

-------------------------------------------------------------------------------
      Net change                                         (24,929,616)
(7,803,951)                            (32,733,567)

-------------------------------------------------------------------------------
Net realized and unrealized loss                         (47,157,171)
(12,946,859)               -            (60,104,030)

-------------------------------------------------------------------------------
NET DECREASE IN NET ASSETS
RESULTING FROM OPERATIONS                              $ (25,472,569)         $
(5,865,994)       $ (149,219)        $ (31,487,782)

===============================================================================
</TABLE>


(1)  Calculated  in  accordance  with  the  investment   advisory  agreement  of
Oppenheimer  California  Municipal  Fund  (0.60% on the first  $200  million  of
average  annual net assets,  0.55% of the next $100  million,  0.50% of the next
$200 million,  0.45% of the next $250  million,  0.40% of the next $250 million,
and 0.35% of the average  annual net assets over $1 billion).  This assumes that
the  management  fee  structure  had been in place for the  entire  period.  (2)
Calculated in accordance  with the service plan and agreement under 12b-1 of the
Investment Company Act adopted by Oppenheimer  California Municipal Fund for its
Class A shares. Under the plan, payment is made quarterly at an annual rate that
may not  exceed  0.25% of  average  annual  net  assets of Class A shares.  This
assumes that the service plan fee had been in place for the entire  period.  (3)
Reflects elimination of duplicate printing fee.
(4) Reflects  elimination of fees accrued fiscal year to date,  pursuant to Rule
24f-2 under the  Investment  Company Act of 1940.  (5) Reflects  elimination  of
duplicate legal and auditing fees.



<PAGE>


<PAGE>

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>             <C>
<C>          <C>          <C>             <C>
MUNICIPAL BONDS AND
NOTES - 99.9%
------------------------------------------------------------------------------------------------------------------------------------
CALIFORNIA - 93.9%
------------------------------------------------------------------------------------------------------------------------------------
Alhambra, CA COP, Police
Facilities Assessment
District No. 91-1, AMBAC
Insured, 6.75%, 9/1/23          Aaa /AAA /AAA  $    5,000,000  $           --  $
5,000,000  $ 5,220,450  $           --  $ 5,220,450
------------------------------------------------------------------------------------------------------------------------------------
Anaheim, CA PFAU TXAL RB,
MBIA Insured, Inverse
Floater, 8.97%, 12/28/18(1)     Aaa /AAA            3,000,000       1,000,000
4,000,000    3,412,500       1,137,500    4,550,000
------------------------------------------------------------------------------------------------------------------------------------
Berkeley, CA HF RRB, Alta
Bates Medical Center,
Prerefunded, Series A,
6.50%, 12/1/11                  A2 /NR              4,270,000       1,425,000
5,695,000    4,493,364       1,499,542    5,992,906
------------------------------------------------------------------------------------------------------------------------------------
CA Assn. of Bay Area
Governments FAU for
Non-profit Corps.
Refunding COP, American
Baptist Homes, Series A,
6.20%, 10/1/27                  NR /BBB             6,000,000       1,790,000
7,790,000    5,380,860       1,605,290    6,986,150
------------------------------------------------------------------------------------------------------------------------------------
CA Assn. of Bay Area
Governments FAU for
Non-profit Corps.
Refunding COP, Rhonda
Haas Goldman Plaza,
5.125%, 5/15/23                 NR /AA-             2,300,000         700,000
3,000,000    2,077,820         632,380    2,710,200
------------------------------------------------------------------------------------------------------------------------------------
CA CDAU Lease RB, United
Airlines, Series A, 5.70%,
10/1/33                         Baa3/BB+            9,185,000       3,200,000
12,385,000    8,097,037       2,820,960   10,917,997
------------------------------------------------------------------------------------------------------------------------------------
CA CDAU MH RB, Village
Riviera Hills, Series E,
5.45%, 2/1/25                   NR  /AAA                   --       1,000,000
1,000,000           --         979,890      979,890
------------------------------------------------------------------------------------------------------------------------------------
CA Educational FA RRB,
Los Angeles College
Chiropractic, 5.60%,
11/1/17                         Baa2/NR             1,000,000              --
1,000,000      931,280              --      931,280
------------------------------------------------------------------------------------------------------------------------------------
CA Foothill/Eastern
Corridor Agency Toll Road
CAP RB, Sr. Lien, Series
A, Zero Coupon, 6.12%,
1/1/23(2)                       Baa3/BBB-/AAA      10,000,000              --
10,000,000    2,672,600              --    2,672,600
------------------------------------------------------------------------------------------------------------------------------------
CA Foothill/Eastern
Corridor Agency Toll Road
RB, Sr. Lien, Prerefunded,
Series A, 6.50%, 1/1/32         Aaa /AAA /BBB       4,600,000       1,400,000
6,000,000    5,086,358       1,548,022    6,634,380
------------------------------------------------------------------------------------------------------------------------------------
CA Foothill/Eastern
Corridor Agency Toll Road
RRB, Zero Coupon, 5.98%,
1/15/21(2)                      Baa3/BBB-/BBB       7,500,000       5,000,000
12,500,000    2,030,475       1,353,650    3,384,125
------------------------------------------------------------------------------------------------------------------------------------
CA Foothill/Eastern
Corridor Agency Toll Road
RRB, Zero Coupon, 6%,
1/15/22(2)                      Baa3/BBB-/BBB       7,500,000       5,500,000
13,000,000    1,894,800       1,389,520    3,284,320
------------------------------------------------------------------------------------------------------------------------------------
CA GOUN, 5.75%, 3/1/30          Aa3 /AA- /AA       12,150,000       2,000,000
14,150,000   12,183,534       2,005,520   14,189,054
------------------------------------------------------------------------------------------------------------------------------------
CA HFA RB, Series A,
7.35%, 8/1/11                   Aa2 /AA-               75,000              --
75,000       77,852              --       77,852
------------------------------------------------------------------------------------------------------------------------------------
CA HFA RB, Series C,
7.60%, 8/1/30                   Aa2 /AA-              650,000              --
650,000      655,811              --      655,811
------------------------------------------------------------------------------------------------------------------------------------
CA HFA RB, Series E-1,
6.45%, 2/1/12                   Aa2 /AA-              750,000              --
750,000      764,407              --      764,407
------------------------------------------------------------------------------------------------------------------------------------
CA HFA SFM Purchase RB,
Series A-2, 6.45%, 8/1/25       Aaa /AAA                   --       2,095,000
2,095,000           --       2,125,713    2,125,713
------------------------------------------------------------------------------------------------------------------------------------
CA HFA SFM RB, Series 83,
Inverse Floater, 9.085%,
8/1/25(1)                       Aa2 /A-1            3,245,000              --
3,245,000    3,340,143              --    3,340,143
------------------------------------------------------------------------------------------------------------------------------------
CA HFA SFM RB, Series C,
6.75%, 2/1/25                   Aa2 /AA-            9,555,000       4,770,000
14,325,000    9,735,685       4,860,201   14,595,886
------------------------------------------------------------------------------------------------------------------------------------
CA HFFAU RB, Los Angeles
Children's Hospital,
Prerefunded, Series A,
7.125%, 6/1/21                  Aaa /NR             1,000,000              --
1,000,000    1,053,650              --    1,053,650
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>            <C>             <C>
<C>          <C>          <C>             <C>
CA Infrastructure & ED
Bank RB, American Center
for Wine, Food & Arts,
5.75%, 12/1/24                  NR /A /A            5,000,000              --
5,000,000    4,732,150              --    4,732,150
------------------------------------------------------------------------------------------------------------------------------------
CA Infrastructure & ED
Bank RB, American Center
for Wine, Food & Arts,
5.55%, 12/1/12                  NR /A /A                   --       1,710,000
1,710,000           --       1,714,959    1,714,959
------------------------------------------------------------------------------------------------------------------------------------
CA PCFAU SWD RRB, North
Cnty. Recycling Center,
Escrowed to Maturity,
Series A, 6.75%, 7/1/11         Aaa /NR               500,000              --
500,000      530,800              --      530,800
------------------------------------------------------------------------------------------------------------------------------------
CA PCFAU RB, Pacific Gas &
Electric Co. Project,
Series B, 6.35%, 6/1/09         A1 /AA-                    --       2,000,000
2,000,000           --       2,108,720    2,108,720
------------------------------------------------------------------------------------------------------------------------------------
CA PWBL RB, State Prison
Department of Corrections,
Series E, FSA Insured,
5.50%, 6/1/15                   Aaa /AAA /AAA       3,000,000       2,000,000
5,000,000    3,082,260       2,054,840    5,137,100
------------------------------------------------------------------------------------------------------------------------------------
CA PWBL RRB, Various
University of CA Projects,
Series A, 5.50%, 6/1/14         Aa3 /A+ /A+         1,500,000              --
1,500,000    1,552,980              --    1,552,980
------------------------------------------------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM
RB, Mtg.-Backed Securities
Program, Series B, 7.75%,
9/1/26                          NR /AAA                    --         845,000
845,000           --         898,362      898,362
------------------------------------------------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM
RB, Mtg.-Backed Securities
Program, Series D, Cl. 5,
6.70%, 5/1/29                   NR /AAA                    --       1,890,000
1,890,000           --      2,044,696     2,044,696
------------------------------------------------------------------------------------------------------------------------------------
CA SCDAU COP, 7.25%,
11/1/29                         NR /NR              5,000,000       2,000,000
7,000,000    4,931,850       1,972,740    6,904,590
------------------------------------------------------------------------------------------------------------------------------------
CA SCDAU COP, Winward
Schools, 7.25%, 11/1/29         NR /NR              1,500,000         500,000
2,000,000    1,504,140         501,380    2,005,520
------------------------------------------------------------------------------------------------------------------------------------
CA SCDAU Revenue Refunding
COP, Inverse Floater,
7.068%, 11/1/15(1)              A1 /NR              6,600,000       1,200,000
7,800,000    6,509,250       1,183,500    7,692,750
------------------------------------------------------------------------------------------------------------------------------------
Campbell, CA RA TXAL RB,
Central Campbell
Redevelopment Project,
Series B, 6.60%, 10/1/32        Baa3/BBB-           1,255,000       1,100,000
2,355,000    1,267,487       1,110,945    2,378,432
------------------------------------------------------------------------------------------------------------------------------------
Campbell, CA Refunding
COP, Civic Center Project,
Unrefunded Balance, 6.75%,
10/1/17                         A2 /NR              1,130,000              --
1,130,000    1,193,303              --    1,193,303
------------------------------------------------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Bonds, Ladera No.
98-2, 5.70%, 9/1/20             NR /NR              4,000,000              --
4,000,000    3,577,360              --    3,577,360
------------------------------------------------------------------------------------------------------------------------------------
Capistrano, CA USD CFD
SPTX Bonds, Prerefunded,
No. 92-1, 7.10%, 9/1/21         NR /NR              3,250,000              --
3,250,000    3,723,330              --    3,723,330
------------------------------------------------------------------------------------------------------------------------------------
Cerritos, CA PFAU RB, Los
Coyotes Redevelopment
Project, 6.50%, 11/1/23         Aaa /AAA /AAA       3,000,000              --
3,000,000    3,336,150              --    3,336,150
------------------------------------------------------------------------------------------------------------------------------------
Chino Basin, CA Regional
FAU RB, Inland Empire
Utility Agency Sewer
Project, MBIA Insured,
5.75%, 11/1/19                  Aaa /AAA            1,000,000              --
1,000,000    1,016,990              --    1,016,990
------------------------------------------------------------------------------------------------------------------------------------
Chino Basin, CA Regional
FAU RB, Inland Empire
Utility Agency Sewer
Project, MBIA Insured,
5.75%, 11/1/22                  Aaa /AAA              500,000              --
500,000      503,715              --      503,715
------------------------------------------------------------------------------------------------------------------------------------
Clovis, CA USD CAP GOB,
Series D, FGIC Insured,
Zero Coupon, 5.60%, 8/1/10(2)   Aaa /AAA            2,000,000              --
2,000,000    1,190,380              --    1,190,380
------------------------------------------------------------------------------------------------------------------------------------
Colton, CA PFAU TXAL RRB,
Redevelopment Projects,
Series B, 5.875%, 8/1/27        NR /NR              3,700,000              --
3,700,000    3,390,384              --    3,390,384
------------------------------------------------------------------------------------------------------------------------------------
Commerce, CA Community
Development Commission
TXAL Refunding Bonds,
Redevelopment Project
No. 1, Sub. Lien, Series
B, 5.75%, 8/1/10                NR /NR                815,000              --
815,000      818,138              --      818,138
------------------------------------------------------------------------------------------------------------------------------------
Commerce, CA Community
Development Commission
TXAL Refunding Bonds,
Redevelopment Project
No. 1, Sub. Lien, Series
B, 6%, 8/1/21                   NR /NR              2,800,000              --
2,800,000    2,628,612              --    2,628,612
------------------------------------------------------------------------------------------------------------------------------------
Commerce, CA Joint Powers
FAU Lease RB, Community
Center, Series A, 6.25%,
10/1/22                         Baa2/NR             1,410,000              --
1,410,000    1,397,395              --    1,397,395
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>            <C>             <C>
<C>          <C>          <C>             <C>
Compton, CA Refunding COP,
Civic Center & Capital
Improvements, Series A,
5.50%, 9/1/15                   NR /BBB             3,000,000              --
3,000,000    2,786,220              --    2,786,220
------------------------------------------------------------------------------------------------------------------------------------
Contra Costa Cnty., CA
SPTX RRB, CFD No. 91-1,
5.58%, 8/1/16                   NR /NR                     --       3,075,000
3,075,000           --       2,823,865    2,823,865
------------------------------------------------------------------------------------------------------------------------------------
Corona, CA SFM RB, Sub.
Lien, Series B, 6.30%,
11/1/28                         A2 /NR                     --         800,000
800,000           --         804,680      804,680
------------------------------------------------------------------------------------------------------------------------------------
Davis, CA Public
Facilities FAU Local
Agency RRB, Mace Ranch
Area, Series A, 6.60%,
9/1/25                          NR /NR              3,445,000              --
3,445,000    3,475,729              --    3,475,729
------------------------------------------------------------------------------------------------------------------------------------
Duarte, CA COP, City of
Hope National Medical
Center, 6.25%, 4/1/23           Baa1/AAA            4,500,000              --
4,500,000    4,808,610              --    4,808,610
------------------------------------------------------------------------------------------------------------------------------------
East Palo Alto, CA RA TXAL
RB, 6.625%, 10/1/29             NR  /NR             2,430,000        850,000
3,280,000    2,455,904         859,061    3,314,965
------------------------------------------------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA Insured, Zero Coupon, 6.20%,
11/1/18(2)                      Aaa /AAA            6,000,000              --
6,000,000    2,113,260              --    2,113,260
------------------------------------------------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA Insured, Zero Coupon, 6.20%,
11/1/19(2)                      Aaa /AAA            2,000,000       2,000,000
4,000,000      660,900         660,900    1,321,800
------------------------------------------------------------------------------------------------------------------------------------
Folsom, CA SPTX Bonds, CFD
No. 10, 6.875%, 9/1/19          NR  /NR             6,500,000       2,000,000
8,500,000    6,604,845       2,032,260    8,637,105
------------------------------------------------------------------------------------------------------------------------------------
Fontana, CA RA TXAL GORB,
Jurupa Hills Redevelopment
Project, Prerefunded,
Series A, 7.10%, 10/1/23        NR  /BBB+                  --       1,960,000
1,960,000           --       2,119,152    2,119,152
------------------------------------------------------------------------------------------------------------------------------------
Fresno, CA USD GORB,
Series A, MBIA Insured,
6.55%, 8/1/20                   Aaa /AAA /AAA              --       1,225,000
1,225,000           --       1,369,599    1,369,599
------------------------------------------------------------------------------------------------------------------------------------
Fresno, CA USD GOUN,
Series A, MBIA Insured,
6.40%, 8/1/16                   Aaa /AAA /AAA              --       1,000,000
1,000,000           --       1,117,420    1,117,420
------------------------------------------------------------------------------------------------------------------------------------
Glendale, CA EU RB, MBIA
Insured, 5.90%, 2/1/25          Aaa /AAA /AAA       2,455,000       5,000,000
7,455,000    2,500,221       5,092,100    7,592,321
------------------------------------------------------------------------------------------------------------------------------------
Golden West Schools FAU
CAP RRB, Series A, MBIA
Insured, Zero Coupon,
6.14%, 2/1/20(2)                Aaa /AAA /AAA              --       2,480,000
2,480,000           --         788,020      788,020
------------------------------------------------------------------------------------------------------------------------------------
Golden West Schools FAU
CAP RRB, Series A, MBIA
Insured, Zero Coupon,
6.14%, 8/1/20(2)                Aaa /AAA /AAA              --       2,000,000
2,000,000           --         617,400      617,400
------------------------------------------------------------------------------------------------------------------------------------
Huntington Park, CA PFAU
Lease RRB, Wastewater
System Project, Series A,
6.20%, 10/1/25                  NR /NR              3,000,000              --
3,000,000    2,905,680              --    2,905,680
------------------------------------------------------------------------------------------------------------------------------------
Industry, CA Improvement
Bond Act of 1915 SPAST
GOB, Prerefunded, District
No. 91-1, 7.65%, 9/2/21         NR /NR              1,750,000              --
1,750,000    1,902,442              --    1,902,442
------------------------------------------------------------------------------------------------------------------------------------
Irvine, CA Improvement
Bond Act 1915 SPAST Bonds,
Assessment District No.
94-13, Group 2, 5.875%,
9/2/17                          NR /NR                     --       1,250,000
1,250,000           --       1,193,587    1,193,587
------------------------------------------------------------------------------------------------------------------------------------
Laguna Salada, CA USD CAP GOB, Series B, FGIC Insured, Zero Coupon,
5.30%, 8/1/22(2)                Aaa /AAA /AAA       3,035,000              --
3,035,000      825,611              --      825,611
------------------------------------------------------------------------------------------------------------------------------------
Lake Elsinore, CA School
FAU SPTX RRB, Horsethief
Canyon, 5.625%, 9/1/16          NR /NR              4,760,000              --
4,760,000    4,305,325              --    4,305,325
------------------------------------------------------------------------------------------------------------------------------------
Lake Elsinore, CA School
FAU RRB, Horsethief
Canyon, 5.35%, 9/1/10           NR /NR                     --       2,000,000
2,000,000           --       1,879,180    1,879,180
------------------------------------------------------------------------------------------------------------------------------------
Las Virgenes, CA USD CAP
Bonds, Series A, MBIA
Insured, Zero Coupon,
4.95%, 11/1/12(2)               Aaa /AAA /AAA              --       2,095,000
2,095,000           --       1,085,378    1,085,378
------------------------------------------------------------------------------------------------------------------------------------
Lincoln, CA Improvement
Bond Act 1915 PFAU RB,
6.20%, 9/2/25                   NR /NR              3,970,000       1,490,000
5,460,000    3,787,975       1,421,683    5,209,658
------------------------------------------------------------------------------------------------------------------------------------
Long Beach, CA Harbor RRB,
Series A, FGIC Insured,
6%, 5/15/10                     Aaa /AAA                   --         500,000
500,000           --         534,185      534,185
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP
COP, Disney Parking
Project, Zero Coupon,
6.92%, 9/1/10(2)                A3 /BBB+/A-         5,960,000              --
5,960,000    3,364,599              --    3,364,599
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP
COP, Disney Parking
Project, Zero Coupon,
6.95%, 9/1/11(2)                A3 /BBB+/A-         2,900,000              --
2,900,000    1,541,089              --    1,541,089
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>             <C>
<C>          <C>          <C>             <C>
Los Angeles Cnty., CA CAP
COP, Disney Parking
Project, Zero Coupon,
7.03%, 9/1/13(2)                A3 /BBB+/A-         4,500,000              --
4,500,000    2,088,270              --    2,088,270
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP
COP, Disney Parking
Project, Zero Coupon,
6.13%, 9/1/14(2)                A3 /BBB+/A-         6,860,000              --
6,860,000    3,131,110              --    3,131,110
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA COP,
Disney Parking Project,
Zero Coupon, 5.94%, 3/1/12(2)   Aaa /AAA /AAA       1,100,000              --
1,100,000      588,731              --      588,731
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP
COP, Disney Parking
Project, Zero Coupon,
6.95%, 9/1/11(2)                A3 /BBB+/A-                --       2,340,000
2,340,000           --       1,243,499    1,243,499
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU
Sales Tax RRB, Series A,
FSA Insured, 5%, 7/1/14         Aaa /AAA /AAA              --       1,500,000
1,500,000           --       1,464,780    1,464,780
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU
Sales Tax RRB, Series A,
MBIA Insured, 5.25%,
7/1/15                          Aaa /AAA /AAA              --       2,000,000
2,000,000           --       1,982,240    1,982,240
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA
Participation Certificates
RB, Zero Coupon, 6.30%,
9/1/16(2)                       Aaa /AAA /AAA              --       1,495,000
1,495,000           --         597,537      597,537
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA Harbor
Department RB, Series B,
5.375%, 11/1/23                 Aa3 /AA  /AA        5,000,000              --
5,000,000    4,701,000              --    4,701,000
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA USD GOB,
Series A, FGIC Insured,
6%, 7/1/15                      Aaa /AAA /AAA              --       1,000,000
1,000,000           --       1,080,680    1,080,680
------------------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA Water &
Power Department RRB,
5.50%, 10/15/12                 Aa3 /AAA /AAA              --       1,000,000
1,000,000           --       1,034,860    1,034,860
------------------------------------------------------------------------------------------------------------------------------------
Modesto, CA Irrigation
District FAU RRB, Series
A, MBIA Insured, 6%,
10/1/15                         Aaa /AAA            5,000,000              --
5,000,000    5,262,950              --    5,262,950
------------------------------------------------------------------------------------------------------------------------------------
Mountain View Los Altos,
CA Union High SDI RB,
Series B, 6.50%, 5/1/17         Aa2 /AA             2,000,000              --
2,000,000    2,172,660              --    2,172,660
------------------------------------------------------------------------------------------------------------------------------------
Norco, CA SPTX Bonds, CDD
No. 97-1, 7.10%, 10/1/00        NR /NR              1,000,000         320,000
1,320,000    1,014,810         324,739    1,339,549
------------------------------------------------------------------------------------------------------------------------------------
Oakland, CA RA TXAL
Refunding Bonds, MBIA
Insured, 5.95%, 9/1/19(3)       Aaa /AAA            8,600,000              --
8,600,000    8,632,594              --    8,632,594
------------------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No.
88-1 SPTX Bonds, Aliso
Viejo, Prerefunded, Series
A, 7.10%, 8/15/05               NR /AAA             1,440,000              --
1,440,000    1,555,027              --    1,555,027
------------------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No.
88-1 SPTX Bonds, Aliso
Viejo, Prerefunded, Series
A, 7.35%, 8/15/18               NR /AAA             7,000,000              --
7,000,000    7,598,220              --    7,598,220
------------------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No.
99-1 SPTX RB, Series A,
6.70%, 8/15/29                  NR /NR              1,600,000         650,000
2,250,000    1,625,664         660,426    2,286,090
------------------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA
Improvement Bond Act of
1915 SPAST GOB, Assessment
No. 88-1, 6.25%, 9/2/18         NR /NR              2,130,000              --
2,130,000    2,114,920              --    2,114,920
------------------------------------------------------------------------------------------------------------------------------------
Oxnard, CA USD GOUN,
Series E, FGIC Insured,
5.90%, 8/1/26                   NR /AAA             2,540,000              --
2,540,000    2,583,205              --    2,583,205
------------------------------------------------------------------------------------------------------------------------------------
Oxnard, CA USD GOUN,
Series E, FGIC Insured,
5.90%, 8/1/30                   NR /AAA             2,180,000              --
2,180,000    2,213,659              --    2,213,659
------------------------------------------------------------------------------------------------------------------------------------
Palmdale, CA Civic
Authority RRB, Merged
Redevelopment Project,
Prerefunded, Series A,
6.60%, 9/1/34                   Aaa /AAA                   --         595,000
595,000           --         654,167      654,167
------------------------------------------------------------------------------------------------------------------------------------
Palmdale, CA Civic
Authority RRB, Merged
Redevelopment Project,
Unrefunded Balance, Series
A, 6.60%, 9/1/34                NR /A                      --         405,000
405,000           --         418,673      418,673
------------------------------------------------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL
Bonds, Los Medanos
Community Development
Project, AMBAC Insured,
5.80%, 8/1/17                   Aaa /AAA            1,525,000              --
1,525,000    1,570,216              --    1,570,216
------------------------------------------------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL
Bonds, Los Medanos
Community Development
Project, AMBAC Insured,
5.85%, 8/1/18                   Aaa /AAA            1,615,000              --
1,615,000    1,661,787              --    1,661,787
------------------------------------------------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL
Bonds, Los Medanos
Community Development
Project, AMBAC Insured,
Zero Coupon, 6.10%, 8/1/20(2)   Aaa /AAA            5,150,000              --
5,150,000    1,580,380              --    1,580,380
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>             <C>
<C>          <C>          <C>             <C>
Pittsburg,  CA RA  TXAL  Refunding  Bonds,  Los  Medanos  Community  Development
Project, Sub.
Lien, 6.20%, 8/1/19             NR  /BBB            2,500,000       1,000,000
3,500,000    2,460,775         984,310    3,445,085
------------------------------------------------------------------------------------------------------------------------------------
Pittsburgh, CA RA TXAL RB,
Los Medanos Community
Development Project, AMBAC
Insured, 5.75%, 8/1/16          Aaa /AAA                   --         720,000
720,000           --         742,637      742,637
------------------------------------------------------------------------------------------------------------------------------------
Placentia, CA PFAU SPTX
RB, Jr. Lien, Series B,
6.60%, 9/1/15                   NR  /NR             1,600,000              --
1,600,000    1,622,320              --    1,622,320
------------------------------------------------------------------------------------------------------------------------------------
Pomona, CA SFM RRB,
Escrowed to Maturity,
Series A, 7.60%, 5/1/23         Aaa /AAA            4,500,000       2,500,000
7,000,000    5,467,905       3,037,725    8,505,630
------------------------------------------------------------------------------------------------------------------------------------
Pomona, CA SFM RRB,
Escrowed to Maturity,
Series B, 7.50%, 8/1/23         Aaa /AAA              500,000              --
500,000      601,845              --      601,845
------------------------------------------------------------------------------------------------------------------------------------
Pomona, CA USD GORB,
Series A, MBIA Insured,
6.15%, 8/1/15                   Aaa /AAA            2,000,000         500,000
2,500,000    2,178,920         544,730    2,723,650
------------------------------------------------------------------------------------------------------------------------------------
Pomona, CA USD Refunding
GOUN, Series A, MBIA
Insured, 6.45%, 8/1/22          Aaa /AAA                   --       1,000,000
1,000,000           --       1,113,900    1,113,900
------------------------------------------------------------------------------------------------------------------------------------
Port Oakland, CA POAU RB,
Series G, MBIA Insured,
5.375%, 11/1/25                 Aaa /AAA /AAA      10,650,000              --
10,650,000    9,989,167              --    9,989,167
------------------------------------------------------------------------------------------------------------------------------------
Port Oakland, CA RB,
Series K, FGIC Insured,
5.75%, 11/1/15                  Aaa /AAA /AAA       2,615,000       2,385,000
5,000,000    2,682,232       2,446,318    5,128,550
------------------------------------------------------------------------------------------------------------------------------------
Port Oakland, CA RB,
Series K, FGIC Insured,
5.75%, 11/1/17                  Aaa /AAA /AAA       5,000,000              --
5,000,000    5,125,850              --    5,125,850
------------------------------------------------------------------------------------------------------------------------------------
Redding, CA Electric
System Revenue COP, FGIC
Insured, Inverse Floater,
7.028%, 6/1/19(1)               Aaa /AAA /AAA       4,000,000       1,150,000
5,150,000    3,935,000       1,131,312    5,066,312
------------------------------------------------------------------------------------------------------------------------------------
Redding, CA Electric
System Revenue COP, MBIA
Insured, Inverse Floater,
8.548%, 7/8/22(1)               Aaa /AAA            2,500,000         500,000
3,000,000    2,846,875         569,375    3,416,250
------------------------------------------------------------------------------------------------------------------------------------
Richmond, CA Improvement
Bond Act of 1915 GORB,
Reassessment District No.
855, 6.60%, 9/2/19              NR /NR              1,500,000              --
1,500,000    1,545,735              --    1,545,735
------------------------------------------------------------------------------------------------------------------------------------
Richmond, CA Wastewater
RB, FGIC Insured, 5.80%,
8/1/16                          Aaa /AAA                              765,000
765,000           --         793,580      793,580
------------------------------------------------------------------------------------------------------------------------------------
Richmond, CA Wastewater
RB, FGIC Insured, 5.80%,
8/1/18                          Aaa /AAA            3,315,000             --
3,315,000    3,399,168              --    3,399,168
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA CFD
No. 88-12 SPTX Bonds,
Prerefunded, 7.55%, 9/1/17      NR /NR              3,000,000       1,500,000
4,500,000    3,104,160       1,552,080    4,656,240
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU
Refunding COP, 5.75%,
5/15/19                         NR /BBB-            2,100,000              --
2,100,000    1,913,856              --    1,913,856
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU
TXAL RRB, Redevelopment
Projects, Series A,
5.625%, 10/1/33                 Baa2/BBB-           6,600,000       1,650,000
8,250,000    5,757,972       1,439,493    7,197,465
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA
Refunding COP, Air Force
Village West, Inc.,
Prerefunded, Series A,
8.125%, 6/15/12                 NR /NR              3,000,000              --
3,000,000    3,275,070              --    3,275,070
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA
Refunding COP, Air Force
Village West, Inc., Series
A, 8.125%, 6/15/20              NR /NR              3,000,000              --
3,000,000    3,282,390              --    3,282,390
------------------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA SFM
RB, Escrowed to Maturity,
Series A, 7.80%, 5/1/21         Aaa /AAA            4,285,000       1,000,000
5,285,000    5,321,456       1,241,880    6,563,336
------------------------------------------------------------------------------------------------------------------------------------
Riverside, CA Water RRB,
5.375%, 10/1/12                 NR /AA /AA                 --       1,000,000
1,000,000           --       1,027,470    1,027,470
------------------------------------------------------------------------------------------------------------------------------------
Roseville, CA SPTX RB,
Woodcreek West Community
Facility No. 1 Project,
5.875%, 9/1/08                  NR /NR              1,235,000              --
1,235,000    1,237,359              --    1,237,359
------------------------------------------------------------------------------------------------------------------------------------
Roseville, CA SPTX RB,
Woodcreek West Community
Facility No. 1 Project,
6.50%, 9/1/15                   NR /NR                     --       1,500,000
1,500,000           --       1,519,800    1,519,800
------------------------------------------------------------------------------------------------------------------------------------
Roseville, CA SPTX RB,
Woodcreek West Community
Facility No. 1 Project,
6.70%, 9/1/25                   NR /NR              1,750,000              --
1,750,000    1,766,957              --    1,766,957
------------------------------------------------------------------------------------------------------------------------------------
Sacramento Cnty., CA SFM
RB, Escrowed to Maturity,
8%, 7/1/16                      Aaa /AAA           10,000,000       2,810,000
12,810,000   12,568,500       3,531,749   16,100,249
------------------------------------------------------------------------------------------------------------------------------------
Sacramento, CA
Cogeneration Authority RB,
Procter & Gamble Project,
6.50%, 7/1/14                   NR /BBB-/NR         5,000,000              --
5,000,000    5,505,850              --    5,505,850
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>             <C>
<C>          <C>          <C>             <C>
Sacramento, CA MUD
Electric RRB, FGIC
Insured, Inverse Floater,
8.894%, 8/15/18(1)              Aaa /AAA /AAA       5,500,000       1,500,000
7,000,000    5,898,750       1,608,750    7,507,500
------------------------------------------------------------------------------------------------------------------------------------
Sacramento, CA PAU RB,
Cogeneration Project, 6%,
7/1/22                          NR /BBB-            6,800,000              --
6,800,000    6,513,788              --    6,513,788
------------------------------------------------------------------------------------------------------------------------------------
Sacramento, CA USD GOUN,
Series A, 5.875%, 7/1/21        Aa3 /NR /AA         1,070,000         430,000
1,500,000    1,093,765         439,550    1,533,315
------------------------------------------------------------------------------------------------------------------------------------
Sacramento, CA USD GOUN,
Series A, 5.875%, 7/1/23        Aa3 /NR /AA           715,000         285,000
1,000,000      728,485         290,375    1,018,860
------------------------------------------------------------------------------------------------------------------------------------
Salinas Valley, CA Solid
Waste Authority RB, 5.80%,
8/1/27                          Baa3/BBB                   --       1,665,000
1,665,000           --       1,507,508    1,507,508
------------------------------------------------------------------------------------------------------------------------------------
San Bernardino Cnty., CA
COP, Medical Center
Financing Project, MBIA
Insured, 5.50%, 8/1/17          Aaa /AAA            5,250,000              --
5,250,000    5,340,825              --    5,340,825
------------------------------------------------------------------------------------------------------------------------------------
San Diego Cnty., CA COP,
MBIA Insured, Inverse
Floater, 8.42%, 11/18/19(1)     A1 /NR              2,000,000              --
2,000,000    2,112,500              --    2,112,500
------------------------------------------------------------------------------------------------------------------------------------
San Diego Cnty., CA Water
Authority Revenue COP,
Prerefunded, Series 91-B,
MBIA Insured, Inverse
Floater, 8.42%, 4/8/21(1)       Aaa /AAA            3,000,000       1,000,000
4,000,000    3,551,250       1,183,750    4,735,000
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA Bay Area
Rapid Transit District
Sales Tax RB, 5.25%,
7/1/14                          Aa3 /AA- /AA        1,500,000              --
1,500,000    1,500,465              --    1,500,465
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA Bay Area
Rapid Transit District
Sales Tax RRB, AMBAC
Insured, 6.75%, 7/1/11          Aaa /AAA /AAA              --       1,000,000
1,000,000           --       1,158,910    1,158,910
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. International
Airport Commission RB,
Second Series Issue 13-B,
MBIA Insured, 8%, 5/1/07        Aaa /AAA                   --       1,140,000
1,140,000           --       1,332,717    1,332,717
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. International
Airport Commission RB,
Second Series Issue 14-A,
MBIA Insured, 8%, 5/1/07        Aaa /AAA                   --       1,290,000
1,290,000           --       1,508,075    1,508,075
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. RA Lease RB, CAP,
George R. Moscone Project,
Zero Coupon, 5.36%, 7/1/10(2)   A1 /A- /A+                 --       4,500,000
4,500,000           --       2,607,570    2,607,570
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. Redevelopment FAU
TXAL Refunding Bonds, CAP
Redevelopment Projects,
Series C, Zero Coupon,
5.79% 8/1/11(2)                 A2 /A /AAA          1,225,000              --
1,225,000      684,260              --      684,260
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. Redevelopment FAU
TXAL Refunding Bonds, CAP
Redevelopment Projects,
Series C, Zero Coupon,
5.89% 8/1/12(2)                 A2 /A /AAA          1,750,000              --
1,750,000      917,472              --      917,472
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. Redevelopment FAU
TXAL Refunding Bonds, CAP
Redevelopment Projects,
Series C, Zero Coupon,
5.81% 8/1/14(2)                 A2 /A /AAA          1,525,000              --
1,525,000      700,204              --      700,204
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. Redevelopment FAU
TXAL Refunding Bonds,
Series C, Zero Coupon,
5.69%, 8/1/10(2)                A2 /A /AAA            750,000              --
750,000      443,250              --      443,250
------------------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City &
Cnty. Redevelopment FAU
TXAL CAP Refunding Bonds,
Redevelopment Projects,
Series C, Zero Coupon,
5.99% 8/1/13(2)                 A2 /A /AAA                 --         750,000
750,000           --         368,805      368,805
------------------------------------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA
Transportation Corridor
Agency Toll Road CAP RRB,
Series A, MBIA Insured,
Zero Coupon, 5.73%,
1/15/25(2)                      Aaa /AAA /AAA      18,250,000              --
18,250,000    4,261,193              --    4,261,193
------------------------------------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA
Transportation Corridor
Agency Toll Road CAP RRB,
Series A, MBIA Insured,
Zero Coupon, 5.90%,
1/15/26(2)                      Aaa /AAA /AAA      15,000,000              --
15,000,000    3,294,450              --    3,294,450
------------------------------------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA
Transportation Corridor
Agency Toll Road RB, Sr.
Lien, 5%, 1/1/33                Baa3/BBB-/BBB       8,000,000              --
8,000,000    6,733,600              --    6,733,600
------------------------------------------------------------------------------------------------------------------------------------

<PAGE>

<CAPTION>
------------------------------------------------------------------------------------------------------------------------------------
PRO FORMA COMBINING STATEMENT OF INVESTMENTS                                 March
31, 2000 (Unaudited)
Oppenheimer California Municipal Fund and Oppenheimer Main Street California
Municipal Fund

                                               PRINCIPAL
AMOUNT                             MARKET VALUE

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

Oppenheimer                  Oppenheimer  Oppenheimer
                                RATINGS:       Oppenheimer     Main
Street                  California   Main Street
                                MOODY'S/       California      California      Pro
Forma    Municipal    California      Pro Forma
                                S&P/FITCH      Municipal Fund  Municipal Fund
Combined     Fund         Municipal Fund  Combined
------------------------------------------------------------------------------------------------------------------------------------
<S>                            <C>            <C>             <C>
<C>          <C>          <C>             <C>
San Joaquin Hills, CA
Transportation Corridor
Agency Toll Road RB, Sr.
Lien, Prerefunded, 6.75%,
1/1/32                          Aaa /AAA /AAA       7,000,000       3,500,000
10,500,000    7,546,210       3,773,105   11,319,315
------------------------------------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA
Transportation Corridor
Agency Toll Road RB, Sr.
Lien, Zero Coupon, 6.20%,
1/1/23(2)                       Aaa /AAA /AAA       5,250,000              --
5,250,000    1,403,115              --    1,403,115
------------------------------------------------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB,
Inner-City Commuter,
Series C, 5.60%, 9/1/19         NR /BBB             3,060,000              --
3,060,000    2,774,441              --    2,774,441
------------------------------------------------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB,
Mainplace Project, Series
D, 5.50%, 9/1/15                NR /NR              1,000,000              --
1,000,000      917,600              --      917,600
------------------------------------------------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB,
Mainplace Project, Series
D, 5.60%, 9/1/19                NR /NR              1,000,000              --
1,000,000      917,020              --      917,020
------------------------------------------------------------------------------------------------------------------------------------
Santa Cruz, CA City High
SDI GOUN, Series B, FGIC
Insured, 6%, 8/1/29             Aaa /AAA            1,000,000              --
1,000,000    1,032,720              --    1,032,720
------------------------------------------------------------------------------------------------------------------------------------
South Orange Cnty., CA
PFAU SPTX RB, Foothill
Area, Series C, FGIC
Insured, 8%, 8/15/08            Aaa /AAA /AAA              --       1,500,000
1,500,000             --     1,820,100    1,820,100
------------------------------------------------------------------------------------------------------------------------------------
Southern CA Home FAU SFM
RB, Series A, 7.35%,
9/1/24                          NR /AAA               965,000         145,000
1,110,000      991,287         148,950    1,140,237
------------------------------------------------------------------------------------------------------------------------------------
Southern CA Metropolitan
Water District RRB,
Inverse Floater, 6.557%,
10/30/20(1)                     Aa2 /AA             3,300,000       1,200,000
4,500,000    3,147,375       1,144,500    4,291,875
------------------------------------------------------------------------------------------------------------------------------------
Southern CA PPAU
Transmission Project RB,
Inverse Floater, 7.255%,
7/1/12(1)                       Aa3 /A+             1,900,000       2,100,000
4,000,000    2,011,625        2,223,375   4,235,000
------------------------------------------------------------------------------------------------------------------------------------
Stockton, CA CFD No. 90-2
SPTX RRB, Brookside
Estates, 6.20%, 8/1/15          NR /NR              1,750,000              --
1,750,000    1,755,845              --    1,755,845
------------------------------------------------------------------------------------------------------------------------------------
Tustin, CA USD CFD No.
88-1 SPTX RB, Prerefunded,
Series B, 6.375%, 9/1/21        NR /NR              3,500,000              --
3,500,000    3,888,745              --    3,888,745
------------------------------------------------------------------------------------------------------------------------------------
University of CA Regents
RB, Multiple Purpose
Projects, Prerefunded,
Series A, 6.875%, 9/1/16        Aa3 /AAA            1,950,000              --
1,950,000    2,097,869              --    2,097,869
------------------------------------------------------------------------------------------------------------------------------------
West Covina, CA COP, Queen
of the Valley Hospital,
Prerefunded, 6.50%,
8/15/19                         A2 /NR                     --       1,120,000
1,120,000           --       1,227,542    1,227,542
------------------------------------------------------------------------------------------------------------------------------------
West Sacremento, CA
Improvement Bond Act of
1915 SPAST Refunding
Bonds, 5.60%, 9/2/17            NR /NR              2,000,000              --
2,000,000    1,823,740              --    1,823,740

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

369,800,124     113,428,342  483,228,466
</TABLE>

<TABLE>
-----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>           <C>         <C>
<C>          <C>          <C>             <C>
U.S. POSSESSIONS - 6.0%
-----------------------------------------------------------------------------------------------------------------------------------
Guam PAU RB, Series A,
6.625%, 10/1/14                    NR /AAA        2,000,000            --
2,000,000      2,189,120             --      2,189,120
-----------------------------------------------------------------------------------------------------------------------------------
PR CMWLTH GORB, MBIA
Insured, Inverse Floater,
7.882%, 7/1/08(1)                  Aaa /AAA       3,500,000     1,500,000
5,000,000      3,688,125      1,580,625      5,268,750
-----------------------------------------------------------------------------------------------------------------------------------
PR CMWLTH HTAU RB, Inverse
Floater, 5.857%, 7/1/28(1)(4)      NR /NR                --     5,000,000
5,000,000             --      3,968,000      3,968,000
-----------------------------------------------------------------------------------------------------------------------------------
PR EPAU RB, Prerefunded,
Series P, 7%, 7/1/21               Aaa /AAA       4,000,000            --
4,000,000      4,212,360             --      4,212,360
-----------------------------------------------------------------------------------------------------------------------------------
PR HFA SFM RB, Affordable
Housing Mtg. Portfolio I,
6.25%, 4/1/29                      Aaa /AAA       2,375,000            --
2,375,000      2,386,875             --      2,386,875
-----------------------------------------------------------------------------------------------------------------------------------
PR Housing Finance Corp.
SFM RB, Portfolio 1,
Series B, 7.65%, 10/15/22          Aaa /AAA         145,000        65,000
210,000        148,822         66,713        215,535
-----------------------------------------------------------------------------------------------------------------------------------
PR Industrial, Medical &
Environmental PC
Facilities Tourist RB,
Mennonite General Hospital
Project, Series A, 6.50%,
7/1/12                             NR /BBB-/BBB   2,350,000       590,000
2,940,000      2,264,343        568,495      2,832,838
-----------------------------------------------------------------------------------------------------------------------------------
PR Public Buildings
Authority RB, Government
Facilities, Series B,
AMBAC Insured, 5%, 7/1/27          Aaa /AAA              --       300,000
300,000             --        270,066        270,066
-----------------------------------------------------------------------------------------------------------------------------------
Virgin Islands PFAU RB,
Series A, 6.375%, 10/1/19          NR /BBB-       3,000,000     1,515,000
4,515,000      3,021,870      1,526,044      4,547,914
-----------------------------------------------------------------------------------------------------------------------------------

<PAGE>

Virgin Islands PFAU RB,
Sub. Lien, Series E, 6%,
10/1/22                            NR /NR         3,350,000     1,800,000
5,150,000      3,095,869      1,663,452      4,759,321

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

21,007,384      9,643,395     30,650,779

------------   ------------   ------------
Total Municipal Bonds and
Notes (Cost $384,444,745,
$122,908,124, Combined
$507,352,869)
390,807,508    123,071,737    513,879,245

-----------------------------------------------------------------------------------------------------------------------------------
SHORT-TERM TAX-EXEMPT
OBLIGATIONS - 0.9%
-----------------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA
Sanitation District COP, Series C, FGIC Insured, 3.45%, 4/1/00 (Cost $2,600,000,
$2,000,000,
Combined $4,600,030)(3)                           2,600,000     2,000,000
4,600,000      2,600,000      2,000,000      4,600,000

-----------------------------------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS, AT
VALUE (COST $387,044,745,
$124,908,124, COMBINED
$511,952,869)                                          99.6%         89.8%
100.8%   393,407,508    125,071,737    518,479,245
-----------------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS NET OF LIABILITIES                         0.4          10.2
(0.8)    (2,347,068)    (1,731,164)    (3,960,746)
                                                 ----------  ------------
-----------   ------------   ------------   ------------
NET ASSETS                                            100.0%        100.0%
100.0%  $391,060,440   $123,340,573   $514,518,499
                                                 ==========  ============
===========   ============   ============   ============
</TABLE>

To simplify the  listings of  securities,  abbreviations  are used per the table
below:
<TABLE>
<S>                                              <C>
CAP - Capital Appreciation                       MUD - Municipal Utility District
CDAU - Communities Development Authority         PAU - Power Authority
CDD - Community Development District             PC - Pollution Control
CFD - Community Facilities District              PCFAU - Pollution Control Finance
Authority
CMWLTH - Commonwealth                            PFAU - Public Finance Authority
COP - Certificates of Participation              POAU - Port Authority
ED - Economic Development                        PPAU - Public Power Authority
EU - Electric Utilities                          PWBL - Public Works Board Lease
FA - Facilities Authority                        RA - Redevelopment Agency
FAU - Finance Authority                          RB - Revenue Bonds
GOB - General Obligation Bonds                   RRB - Revenue Refunding Bonds
GORB - General Obligation Refunding Bonds        SCDAU - Statewide Communities
Development Authority
GOUN - General Obligation Unlimited Nts.         SDI - School District
HF - Health Facilities                           SFM - Single Family Mtg.
HFA - Housing Finance Agency                     SPAST - Special Assessment
HFFAU - Health Facilities Finance Authority      SPTX - Special Tax
HTAU - Highway & Transportation Authority        SWD - Solid Waste Disposal
MH - Multifamily Housing                         TXAL - Tax Allocation
MTAU - Metropolitan Transportation Authority     USD - Unified School District
</TABLE>

1.  Represents  the current  interest  rate for a variable rate bond known as an
"inverse  floater"  which pays  interest  at a rate that varies  inversely  with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income.  Their price may be more volatile than the price of a comparable
fixed-rate   security.   Inverse   floaters  amount  to  $40,453,393  or  7.86%,
$15,730,687 or 3.06%  (Combined  $56,184,080 or 10.92%) of the Fund's net assets
as of March 31, 2000.

<PAGE>

2. For zero coupon bonds, the interest rate shown is the effective yield on the
date of purchase.
3. Represents the current interest rate for a variable or increasing rate
security.
4.  Represents   securities  sold  under  Rule  144A,   which  are  exempt  from
registration under the Securities Act of 1933, as amended. These securities have
been  determined  to be  liquid  under  guidelines  established  by the Board of
Trustees/ Directors. These securities amount to $0 or 0.00%, $3,968,000 or 0.77%
(Combined $3,968,000 or 0.77%) of the Fund's net assets as of March 31, 2000.


<PAGE>

                                    [PHOTO]
                      Semiannual Report February 29, 2000

     Oppenheimer
     MAIN STREET(R)
     CALIFORNIA MUNICIPAL FUND

                                             [OPPENHEIMERFUNDS LOGO]
                                             The Right Way to Invest

<PAGE>

         CONTENTS

 1      President's Letter

 3      An Interview
        with Your Fund's
        Manager

 8      Financial
        Statements

25      Officers and Directors


REPORT HIGHLIGHTS
--------------------------------------------------------------------------------
RISING INTEREST RATES HURT THE PERFORMANCE OF MUNICIPAL BONDS throughout the
reporting period.

AS OF FEBRUARY 29, 2000, LONG-TERM CALIFORNIA MUNICIPAL BONDS PROVIDED OVER 90%
OF THE YIELD AVAILABLE FROM COMPARABLE U.S. TREASURIES--making them attractive
values on an after-tax basis.

------------------------
CUMULATIVE TOTAL RETURNS

For the 6-Month Period
Ended 2/29/00*

<TABLE>
<CAPTION>
------------------------
Class A

Without     With
Sales Chg.  Sales Chg.
------------------------
<S>       <C>
-1.99%      -6.65%
</TABLE>

<TABLE>
<CAPTION>
Class B

Without     With
Sales Chg.  Sales Chg.
------------------------
<S>       <C>
-2.56%      -7.33%
------------------------
</TABLE>

NOT FDIC INSURED.
NO BANK GUARANTEE.
MAY LOSE VALUE.

* See page 7 for further details.

<PAGE>

[PHOTO]
JAMES C. SWAIN
Chairman
Oppenheimer
Main Street(R) California
Municipal Fund

BRIDGET A. MACASKILL
President
Oppenheimer
Main Street(R) California
Municipal Fund

PRESIDENT'S LETTER
--------------------------------------------------------------------------------
DEAR SHAREHOLDER,

For many years, we have encouraged investors to consider whether they could
tolerate more risk in their long-term investments by participating in the stock
market, which has historically provided higher long-term returns than any other
asset class. Today, however, we have a very different concern: some investors
may be assuming too much risk by concentrating their investments in just a
handful of stocks or sectors or by "chasing performance."

       Alan Greenspan, the Chairman of the Federal Reserve Board, has stated his
view that the recent spectacular returns of some sectors of the market are
partly responsible for pushing our economy to growth rates that could lead to
higher inflation. The dramatic rise in the prices of a narrow segment of the
market has created enormous wealth for some investors. In turn, those investors
are spending at a rate that the Fed believes may threaten the healthy growth of
our economy.

       That's why the Fed has been raising interest rates steadily and
decisively over the past year. By making borrowing more expensive, the Fed is
attempting to slow economic growth. It is a precarious balancing act: too much
tightening creates the risk of recession, while too little opens the door to
inflation.

       The implications are clear: investors must be prepared for near-term
market volatility. In the bond market, higher interest rates usually lead to
lower bond prices. In the stock market, slower economic growth could reduce
corporate earnings and put downward pressure on stock prices. Highly valued
stocks may be particularly vulnerable to a correction. The Securities and
Exchange Commission Chairman, Arthur Levitt, has cautioned investors against the
expectation that the types of returns seen in the recent bull market will last
forever. We agree.

              1   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

PRESIDENT'S LETTER
--------------------------------------------------------------------------------

       Because of the prospect of continued market volatility, we encourage you
to consider diversifying your investments. Indeed, diversification may help you
mitigate the effects of sharp declines in any one area. It may also help you
better position your portfolio to seek greater returns over the long run.

       While "new economy" stocks have risen recently, many "old economy" stocks
are selling at unusually low prices. In the bond market, higher interest rates
over the short term may reduce inflation concerns, which should be beneficial
over the long term. By buying out-of-favor investments, you may be able to
profit when and if they return to favor in the future. Of course, there is no
assurance that value investing will return to favor in the market, but it may be
a diversification strategy to consider for part of your portfolio.

       What specific investments should you consider today so that you are
prepared for tomorrow? The answer depends on your individual investing goals,
risk tolerance and financial circumstances. We urge you to talk with your
financial advisor about ways to diversify your portfolio. This may include
considering global diversification as part of your strategy. While investing
abroad has special risks, such as the effects of foreign currency fluctuation,
it also offers opportunities to participate in global economic growth and to
hedge against the volatility in U.S. markets.

       We thank you for your continued confidence in OppenheimerFunds, The Right
Way to Invest.

Sincerely,

/s/ JAMES C. SWAIN           /s/ BRIDGET A. MACASKILL

    James C. Swain               Bridget A. Macaskill
    March 21, 2000

              2   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

[PHOTO]
PORTFOLIO MANAGEMENT
TEAM (L TO R)
Christian Smith
(Portfolio Manager)
Robert Patterson


AN INTERVIEW WITH YOUR FUND'S MANAGER
--------------------------------------------------------------------------------
Q. HOW WOULD YOU CHARACTERIZE THE FUND'S PERFORMANCE OVER THE SIX-MONTH PERIOD
THAT ENDED FEBRUARY 29, 2000?

A. It has been a difficult period for the municipal securities market, including
Oppenheimer Main Street(R) California Municipal Fund. The rising interest rate
environment, a sharp decline in the demand for municipal bonds and a lack of
supply of new issues were some of the challenges the Fund encountered.

WHAT STEPS ARE YOU TAKING TO HELP IMPROVE THE FUND'S PERFORMANCE?

In November 1999, we began to restructure the Fund under the guidance of
Christian Smith, a money management professional with over 10 years experience
in the municipal market. This change will help us gain a fresh perspective on
the California municipal market, and proactively access the opportunities
available for the Fund.

HOW DID THE ROBUST U.S. ECONOMY AFFECT THE OVERALL MUNICIPAL MARKET?

Ongoing economic strength led to higher interest rates, which, in turn, led to
lower bond prices. With bonds becoming less attractive to investors, many turned
to the stock market for better returns.

              3   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


"Our focus has been to lower the portfolio's sensitivity to changes in interest
rates."

AN INTERVIEW WITH YOUR FUND'S MANAGER
--------------------------------------------------------------------------------

The lengthy economic expansion has also resulted in a decrease in supply of
municipal bonds. First, government surpluses on the federal and state level
resulted in less need to issue debt to finance new projects. Second, the rise in
interest rates caused a natural decline in the refinancing of existing debt.
When interest rates are on the upswing, there is little reason for an
organization to retire existing, lower yielding debt, and introduce new
securities with higher yields. Often- times in the financial markets, a decrease
in supply of a particular security leads to higher prices. However, the decline
in the demand for municipals more than offset the falling supply.

HOW WAS THE FUND MANAGED GIVEN THIS DIFFICULT ENVIRONMENT?

Our focus has been to lower the portfolio's sensitivity to interest rates. For
example, we have been working to reduce the Fund's duration versus its benchmark
by focusing on shorter-term securities. When it appears that interest rates have
peaked, we may look to extend the Fund's duration to take advantage of rising
bond prices.

COULD YOU DESCRIBE SOME OF YOUR INVESTMENT STRATEGIES THAT HELPED PERFORMANCE
DURING THE REPORTING PERIOD?

We enhanced returns through select investments in non-rated California real
estate securities. These bonds are typically issued by smaller organizations,
and are used to help finance the infrastructure needed in new housing
developments. As non-rated securities, they generally offer attractive yields.
Once the developments are occupied by tax-paying families and organizations,
this revenue aids the financial stability of the issuer, and the securities may
then become rated--sometimes leading to capital appreciation for the Fund.

              4   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

<TABLE>
<CAPTION>
----------------------------------
AVERAGE ANNUAL
TOTAL RETURNS

For the Periods Ended 3/31/00(1)

Class A          Since
1-Year   5-Year  Inception
----------------------------------
<S>      <C>     <C>
-7.98%   4.75%   6.31%

<CAPTION>
Class B          Since
1-Year   5-Year  Inception
----------------------------------
<S>      <C>     <C>
-9.01%   4.36%   3.67%

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

<CAPTION>
STANDARDIZED YIELDS(2)
For the 30 Days Ended 2/29/00
----------------------------------
<S>             <C>
Class A         5.19%
----------------------------------
Class B         4.49
----------------------------------
</TABLE>

In addition, we benefited from our investment in a non-profit organization that
helps train handicapped individuals to join the mainstream workforce. This
organization has been in existence for over 30 years, it has a strong management
team in place, and is widely known by companies that are looking for its
services.

HOW DID CALIFORNIA MUNICIPAL BONDS PERFORM COMPARED TO U.S. TREASURIES?

As interest rates rose, both types of securities performed poorly. However, in
recent months investors have bid up the prices of U.S. Treasury securities in
anticipation of the Treasury Department's plan to buy back billions of dollars
of debt. By the end of the reporting period, 30-year, AAA-rated municipal bonds
from California issuers were providing over 95% of the yield of 30-year U.S.
Treasury securities. This compares to a historical average of about 88%. When
the effects of income taxes are taken into account, municipal bonds are
providing much higher levels of "take home" income than U.S. Treasury
securities. As a result, municipal bonds currently represent very attractive
values, in our opinion, especially for California residents in the higher income
tax brackets.


1. See page 7 for further details.
2. Standardized yield is based on net investment income for the 30-day period
ended February 29, 2000. Falling share prices will tend to artificially raise
yields.


              5   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

<TABLE>
<CAPTION>
----------------------------------
CREDIT ALLOCATION(3)

[PIE CHART]

<S>    <C>
AAA     51.0
AA      11.9
A        9.5
BBB     19.5
BB       8.1
----------------------------------
</TABLE>

WHAT IS YOUR OUTLOOK FOR THE ECONOMY OVER THE NEXT FEW MONTHS?

As we see it, the Federal Reserve will remain diligent in its attempt to slow
the pace of economic growth to help ward off an increase in inflation. As such,
we expect interest rates to continue rising into the summer. However, as the
year progresses, we anticipate seeing growth rates fall, as rising interest
rates should lead to a decline in consumer spending, and less dramatic stock
market gains. Ideally, this would eventually result in interest rates moving
downward.

      In the meantime, we will continue to actively monitor the markets--making
careful adjustments to the Fund's portfolio as necessary. We will also work
diligently to enhance returns while being mindful of risk. These are two reasons
why Oppenheimer Main Street California Municipal Fund is an important part of
The Right Way to Invest.


<TABLE>
<CAPTION>
TOP FIVE INDUSTRIES(4)
(Percentage of market value)
--------------------------------------------------------
<S>                                               <C>
Special Assessment                                18.8%
--------------------------------------------------------
Single Family Housing                             15.1
--------------------------------------------------------
Highways                                          11.0
--------------------------------------------------------
General Obligation                                 8.7
--------------------------------------------------------
Electric Utilities                                 8.5
</TABLE>


3. Portfolio data are subject to change. Percentages are as of February 29,
2000, and are dollar-weighted based on invested assets. The Fund may invest up
to 25% of its assets in below-investment-grade securities which carry greater
risk of default. Securities rated by any rating organization are included in the
equivalent Standard & Poor's rating category. Average credit quality and
allocation include rated securities and those not rated by a national rating
organization (currently 16.0% of total investments) but to which the Manager in
its judgment has assigned ratings as securities comparable to those rated by a
rating agency in the same category.
4. Portfolio is subject to change. Percentages are as of February 29, 2000, and
are based on total market value of investments.

              6   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

NOTES
--------------------------------------------------------------------------------

IN REVIEWING PERFORMANCE AND RANKINGS, PLEASE REMEMBER THAT PAST PERFORMANCE
DOES NOT GUARANTEE FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE OF AN
INVESTMENT IN THE FUND WILL FLUCTUATE SO THAT AN INVESTOR'S SHARES, WHEN
REDEEMED, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST. THE FUND'S
PERFORMANCE MAY FROM TIME TO TIME BE SUBJECT TO SUBSTANTIAL SHORT-TERM CHANGES,
PARTICULARLY DURING PERIODS OF MARKET OR INTEREST RATE VOLATILITY. FOR UPDATES
ON THE FUND'S PERFORMANCE, PLEASE CONTACT YOUR FINANCIAL ADVISOR, CALL US AT
1.800.525.7048 OR VISIT OUR WEBSITE AT WWW.OPPENHEIMERFUNDS.COM.

Total returns include changes in share price and reinvestment of dividends and
capital gains distributions in a hypothetical investment for the periods shown.
Cumulative total returns are not annualized. The Fund's total returns shown do
not show the effects of income taxes on an individual's investment. Taxes may
reduce your actual investment returns on income or gains paid by the Fund or any
gains you may realize if you sell your shares.

CLASS A shares were first publicly offered on 5/18/90. Class A returns include
the current maximum initial sales charge of 4.75%. The Fund's maximum sales
charge for Class A shares was lower prior to 11/2/91, so actual performance may
have been higher.

CLASS B shares of the Fund were first publicly offered on 10/29/93. Class B
returns include the applicable contingent deferred sales charge of 5% (1-year)
and 1% (5-year). Because Class B shares convert to Class A shares 72 months
after purchase, the "life of class" return for Class B uses Class A performance
for the period after conversion. Class B shares are subject to an annual 0.75%
asset-based sales charge.

An explanation of the different performance calculations is in the Fund's
prospectus.


              7   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF INVESTMENTS  February 29, 2000 / Unaudited
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                RATINGS:                           MARKET
                                                                MOODY'S/        PRINCIPAL           VALUE
                                                               S&P/FITCH           AMOUNT      SEE NOTE 1
===========================================================================================================
MUNICIPAL BONDS AND NOTES--98.8%
-----------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>              <C>
CALIFORNIA--92.5%
Anaheim, CA PFAU TXAL RB, MBIA Insured,
Inverse Floater, 8.87%, 12/28/18(1)                               Aaa/AAA      $1,000,000      $1,103,750
-----------------------------------------------------------------------------------------------------------
Berkeley, CA HF RRB, Alta Bates Medical Center,
Prerefunded, Series A, 6.50%, 12/1/11                               A2/NR       1,425,000       1,500,739
-----------------------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, American
Baptist Homes, Series A, 6.20%, 10/1/27                            NR/BBB       1,790,000       1,582,378
-----------------------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP,
Rhonda Haas Goldman Plaza, 5.125%, 5/15/23                         NR/AA-         700,000         602,217
-----------------------------------------------------------------------------------------------------------
CA CDAU Lease RB, United Airlines,
Series A, 5.70%, 10/1/33                                         Baa3/BB+       3,200,000       2,696,640
-----------------------------------------------------------------------------------------------------------
CA CDAU MH RB, Village Riviera Hills,
Series E, 5.45%, 2/1/25                                            NR/AAA       1,000,000         973,160
-----------------------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency
Toll Road RB, Sr. Lien, Prerefunded,
Series A, 6.50%, 1/1/32                                     Baa3/BBB-/BBB       1,400,000       1,535,114
-----------------------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency
Toll Road RRB, Zero Coupon, 5.98%, 1/15/21(2)                 Aaa/AAA/AAA       5,000,000       1,295,400
-----------------------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency
Toll Road RRB, Zero Coupon, 6%, 1/15/22(2)                  Baa3/BBB-/BBB       5,500,000       1,330,010
-----------------------------------------------------------------------------------------------------------
CA GOUN, 5.75%, 3/1/30                                         Aa3/AA-/AA       2,000,000       1,945,700
-----------------------------------------------------------------------------------------------------------
CA HFA SFM Purchase RB, Series A-2, 6.45%, 8/1/25                 Aaa/AAA       2,095,000       2,116,285
-----------------------------------------------------------------------------------------------------------
CA HFA SFM RB, Series C, 6.75%, 2/1/25                            Aa2/AA-       4,770,000       4,841,455
-----------------------------------------------------------------------------------------------------------
CA Infrastructure & ED Bank RB,
American Center for Wine, Food & Arts, 5.55%, 12/1/12              NR/A/A       1,710,000       1,678,450
-----------------------------------------------------------------------------------------------------------
CA PCFAU RB, Pacific Gas & Electric Co. Project,
Series B, 6.35%, 6/1/09                                            A1/AA-       2,000,000       2,110,480
-----------------------------------------------------------------------------------------------------------
CA PWBL RB, State Prison Department of
Corrections, Series E, FSA Insured, 5.50%, 6/1/15             Aaa/AAA/AAA       2,000,000       2,004,940
-----------------------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM RB,
Mtg.-Backed Securities Program,
Series B, 7.75%, 9/1/26                                            NR/AAA         845,000         899,224
-----------------------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM RB,
Mtg.-Backed Securities Program,
Series B, 7.75%, 9/1/26                                            NR/AAA           5,000           5,000
-----------------------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM RB,
Mtg.-Backed Securities Program,
Series D, Cl. 5, 6.70%, 5/1/29                                     NR/AAA       1,890,000       1,979,359
-----------------------------------------------------------------------------------------------------------
CA SCDAU COP, 7.25%, 11/1/29                                        NR/NR       2,000,000       1,949,100
-----------------------------------------------------------------------------------------------------------
CA SCDAU COP, Winward Schools, 7.25%, 11/1/29                       NR/NR         500,000         497,410
-----------------------------------------------------------------------------------------------------------
</TABLE>


              8   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


<TABLE>
<CAPTION>
                                                                RATINGS:                           MARKET
                                                                MOODY'S/        PRINCIPAL           VALUE
                                                               S&P/FITCH           AMOUNT      SEE NOTE 1
-----------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>              <C>
CALIFORNIA Continued
CA SCDAU Revenue Refunding COP,
Inverse Floater, 7.11%, 11/1/15(1)                                  A1/NR      $1,200,000      $1,122,000
-----------------------------------------------------------------------------------------------------------
Campbell, CA RA TXAL RB, Central Campbell
Redevelopment Project, Series B, 6.60%, 10/1/32                 Baa3/BBB-       1,100,000       1,076,009
-----------------------------------------------------------------------------------------------------------
Contra Costa Cnty., CA SPTX RRB,
CFD 91-1, 5.58%, 8/1/16                                             NR/NR       3,075,000       2,703,786
-----------------------------------------------------------------------------------------------------------
Corona, CA SFM RB, Sub. Lien, Series B, 6.30%, 11/1/28              A2/NR         800,000         802,560
-----------------------------------------------------------------------------------------------------------
East Palo Alto, CA RA TXAL RB, 6.625%, 10/1/29                      NR/NR         850,000         833,943
-----------------------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB,
MBIA Insured, Zero Coupon, 6.20%, 11/1/19(2)                      Aaa/AAA       2,000,000         625,700
-----------------------------------------------------------------------------------------------------------
Folsom, CA SPTX Bonds, CFD No. 10, 6.875%, 9/1/19                   NR/NR       2,000,000       1,979,900
-----------------------------------------------------------------------------------------------------------
Fontana, CA RA TXAL GORB,
Jurupa Hills Redevelopment Project,
Prerefunded, Series A, 7.10%, 10/1/23                             NR/BBB+       1,960,000       2,118,348
-----------------------------------------------------------------------------------------------------------
Fresno, CA USD GORB, Series A,
MBIA Insured, 6.55%, 8/1/20                                   Aaa/AAA/AAA       1,225,000       1,334,968
-----------------------------------------------------------------------------------------------------------
Fresno, CA USD GOUN, Series A,
MBIA Insured, 6.40%, 8/1/16                                   Aaa/AAA/AAA       1,000,000       1,092,040
-----------------------------------------------------------------------------------------------------------
Glendale, CA EU RB, MBIA Insured, 5.90%, 2/1/25                NR/AAA/AAA       5,000,000       5,004,900
-----------------------------------------------------------------------------------------------------------
Golden West Schools FAU CAP RRB, Series A,
MBIA Insured, Zero Coupon, 6.14%, 2/1/20(2)                   Aaa/AAA/AAA       2,480,000         749,853
-----------------------------------------------------------------------------------------------------------
Golden West Schools FAU CAP RRB, Series A,
MBIA Insured, Zero Coupon, 6.14%, 8/1/20(2)                   Aaa/AAA/AAA       2,000,000         586,840
-----------------------------------------------------------------------------------------------------------
Irvine, CA Improvement Bond Act 1915
SPAST Bonds, Assessment District No. 94-13,
Group 2, 5.875%, 9/2/17                                             NR/NR       1,250,000       1,147,637
-----------------------------------------------------------------------------------------------------------
Lake Elsinore, CA School FAU RRB,
Horsethief Canyon, 5.35%, 9/1/10                                    NR/NR       2,000,000       1,822,160
-----------------------------------------------------------------------------------------------------------
Las Virgenes, CA USD CAP Bonds, Series A,
MBIA Insured, Zero Coupon, 4.95%, 11/1/12(2)                  Aaa/AAA/AAA       2,095,000       1,046,243
-----------------------------------------------------------------------------------------------------------
Lincoln, CA Improvement Bond Act 1915
PFAU RB, 6.20%, 9/2/25                                              NR/NR       1,490,000       1,369,444
-----------------------------------------------------------------------------------------------------------
Lincoln, CA Improvement Bond Act 1915
PFAU RB, 6.20%, 9/2/25                                              NR/NR          10,000          10,300
-----------------------------------------------------------------------------------------------------------
Long Beach, CA Harbor RRB, Series A,
FGIC Insured, 6%, 5/15/10                                         Aaa/AAA         500,000         522,265
-----------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney
Parking Project, Zero Coupon, 6.95%, 9/1/11(2)                 A3/BBB+/A-       2,340,000       1,201,941
-----------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RRB,
Series A, FSA Insured, 5%, 7/1/14                             Aaa/AAA/AAA       1,500,000       1,429,740
</TABLE>


              9   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF INVESTMENTS  Unaudited / Continued
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                RATINGS:                           MARKET
                                                                MOODY'S/        PRINCIPAL           VALUE
                                                               S&P/FITCH           AMOUNT      SEE NOTE 1
-----------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>              <C>
CALIFORNIA Continued
Los Angeles Cnty., CA MTAU Sales Tax RRB,
Series A, MBIA Insured, 5.25%, 7/1/15                         Aaa/AAA/AAA      $2,000,000      $1,935,420
-----------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Participation
Certificates RB, Zero Coupon, 6.30%, 9/1/16(2)                Aaa/AAA/AAA       1,495,000         571,195
-----------------------------------------------------------------------------------------------------------
Los Angeles, CA Department of
Water & Power RRB, 5.50%, 10/15/12                            Aa3/AAA/AAA       1,000,000       1,015,990
-----------------------------------------------------------------------------------------------------------
Los Angeles, CA USD GOB, Series A,
FGIC Insured, 6%, 7/1/15                                      Aaa/AAA/AAA       1,000,000       1,053,930
-----------------------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 99-1 SPTX RB,
Series A, 6.70%, 8/15/29                                            NR/NR         650,000         643,624
-----------------------------------------------------------------------------------------------------------
Palmdale, CA Civic Authority RRB,
Merged Redevelopment Project,
Prerefunded, Series A, 6.60%, 9/1/34                              Aaa/AAA         595,000         651,555
-----------------------------------------------------------------------------------------------------------
Palmdale, CA Civic Authority RRB,
Merged Redevelopment Project,
Unrefunded Balance, Series A, 6.60%, 9/1/34                          NR/A         405,000         413,347
-----------------------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL Refunding Bonds,
Los Medanos Community Development Project,
Sub. Lien, 6.20%, 8/1/19                                           NR/BBB       1,000,000         949,690
-----------------------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL RB, Los Medanos
Community Development Project,
AMBAC Insured, 5.75%, 8/1/16                                      Aaa/AAA         720,000         720,857
-----------------------------------------------------------------------------------------------------------
Pomona, CA SFM RRB, Escrowed to Maturity,
Series A, 7.60%, 5/1/23                                           Aaa/AAA       2,500,000       2,976,400
-----------------------------------------------------------------------------------------------------------
Pomona, CA USD GORB, Series A,
MBIA Insured, 6.15%, 8/1/15                                       Aaa/AAA         500,000         532,505
-----------------------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
FGIC Insured, Inverse Floater, 7.78%, 6/1/19(1)               Aaa/AAA/AAA       1,150,000       1,083,875
-----------------------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
MBIA Insured, Inverse Floater, 8.69%, 7/8/22(1)                   Aaa/AAA         500,000         555,625
-----------------------------------------------------------------------------------------------------------
Richmond, CA Wastewater RB,
FGIC Insured, 5.80%, 8/1/16                                       Aaa/AAA         765,000         777,416
-----------------------------------------------------------------------------------------------------------
Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
Prerefunded, 7.55%, 9/1/17                                          NR/NR       1,500,000       1,556,850
-----------------------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU TXAL RRB,
Redevelopment Projects, Series A, 5.625%, 10/1/33               Baa2/BBB-       1,650,000       1,372,157
-----------------------------------------------------------------------------------------------------------
Riverside Cnty., CA SFM RB, Escrowed
to Maturity, Series A, 7.80%, 5/1/21                              Aaa/AAA       1,000,000       1,217,220
-----------------------------------------------------------------------------------------------------------
Riverside, CA PFAU Lease RB,
AMBAC Insured, 5.25%, 10/1/17                                 Aaa/AAA/AAA       2,100,000       1,985,760
-----------------------------------------------------------------------------------------------------------
Riverside, CA Water RRB, 5.375%, 10/1/12                         NR/AA/AA       1,000,000       1,006,370
</TABLE>


             10   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


<TABLE>
<CAPTION>
                                                                RATINGS:                           MARKET
                                                                MOODY'S/        PRINCIPAL           VALUE
                                                               S&P/FITCH           AMOUNT      SEE NOTE 1
-----------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>              <C>
CALIFORNIA Continued
Roseville, CA SPTX RB, Woodcreek West
Community Facility No. 1 Project, 6.50%, 9/1/15                     NR/NR      $1,500,000      $1,474,875
-----------------------------------------------------------------------------------------------------------
Sacramento Cnty., CA SFM RB,
Escrowed to Maturity, 8%, 7/1/16(3)                               Aaa/AAA       2,810,000       3,468,636
-----------------------------------------------------------------------------------------------------------
Sacramento, CA MUD Electric RRB,
FGIC Insured, Inverse Floater, 8.89%, 8/15/18(1)              Aaa/AAA/AAA       1,500,000       1,578,750
-----------------------------------------------------------------------------------------------------------
Sacramento, CA USD GOUN,
Series A, 5.875%, 7/1/21                                        Aa3/NR/AA         430,000         432,081
-----------------------------------------------------------------------------------------------------------
Sacramento, CA USD GOUN,
Series A, 5.875%, 7/1/23                                        Aa3/NR/AA         285,000         285,675
-----------------------------------------------------------------------------------------------------------
Salinas Valley, CA Solid Waste Authority RB,
5.80%, 8/1/27                                                    Baa3/BBB       1,665,000       1,443,871
-----------------------------------------------------------------------------------------------------------
San Diego Cnty., CA Water Authority
Revenue COP, Prerefunded, Series 91-B,
MBIA Insured, Inverse Floater, 8.66%, 4/8/21(1)                   Aaa/AAA       1,000,000       1,166,250
-----------------------------------------------------------------------------------------------------------
San Francisco, CA Bay Area Rapid Transit District
Sales Tax RRB, AMBAC Insured, 6.75%, 7/1/11                   Aaa/AAA/AAA       1,000,000       1,138,350
-----------------------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Second Series Issue 13-B,
MBIA Insured, 8%, 5/1/07                                          Aaa/AAA       1,140,000       1,325,683
-----------------------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Second Series Issue 14-A,
MBIA Insured, 8%, 5/1/07                                          Aaa/AAA       1,290,000       1,500,115
-----------------------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. RA Lease CAP RB,
George R. Moscone Project, Zero Coupon,
5.36%, 7/1/10(2)                                                 A1/A-/A+       4,500,000       2,538,450
-----------------------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL CAP Refunding Bonds, Redevelopment
Projects, Series C, Zero Coupon, 5.99%, 8/1/13(2)                A2/A/AAA         750,000         353,888
-----------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor Agency
Toll Road CAP RRB, Series A, 0%/5.75%, 1/15/21(4)           Baa3/BBB-/BBB       3,200,000       1,895,968
-----------------------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor Agency
Toll Road RB, Sr. Lien, Prerefunded, 6.75%, 1/1/32            Aaa/AAA/AAA       3,500,000       3,768,625
-----------------------------------------------------------------------------------------------------------
South Orange Cnty., CA PFAU SPTX RB,
Foothill Area, Series C, FGIC Insured, 8%, 8/15/08            Aaa/AAA/AAA       1,500,000       1,803,315
-----------------------------------------------------------------------------------------------------------
Southern CA Home FAU SFM RB,
Series A, 7.35%, 9/1/24                                            NR/AAA         145,000         148,751
-----------------------------------------------------------------------------------------------------------
Southern CA Home FAU SFM RB,
Series A, 7.35%, 9/1/24                                            NR/AAA          15,000          15,000
-----------------------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District
RRB, Inverse Floater, 6.55%, 10/30/20(1)                           Aa2/AA       1,200,000       1,081,500
</TABLE>


             11   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF INVESTMENTS  Unaudited / Continued
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                RATINGS:                           MARKET
                                                                MOODY'S/        PRINCIPAL           VALUE
                                                               S&P/FITCH           AMOUNT      SEE NOTE 1
-----------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>              <C>
CALIFORNIA Continued
Southern CA PPAU Transmission Project RB,
Inverse Floater, 7.25%, 7/1/12(1)                                  Aa3/A+      $2,100,000     $ 2,202,375
-----------------------------------------------------------------------------------------------------------
Stanislaus, CA Waste-To-Energy Financing Agency
Solid Waste Facilities RRB,
Ogden Martin System, Inc.
Project, 7.50%, 1/1/05                                              NR/A-       1,105,000       1,129,277
-----------------------------------------------------------------------------------------------------------
West Covina, CA COP, Queen of the Valley Hospital,
Prerefunded, 6.50%, 8/15/19                                         A2/NR       1,120,000       1,223,208
                                                                                            ---------------
                                                                                              112,221,817

-----------------------------------------------------------------------------------------------------------
U.S. POSSESSIONS--6.3%
PR CMWLTH GORB, MBIA Insured,
Inverse Floater, 7.78%, 7/1/08(1)                                 Aaa/AAA       1,500,000       1,571,250
-----------------------------------------------------------------------------------------------------------
PR CMWLTH HTAU RB,
Inverse Floater, 7.10%, 7/1/28(1),(5)                               NR/NR       5,000,000       3,620,400
-----------------------------------------------------------------------------------------------------------
PR Housing Finance Corp. SFM RB,
Portfolio 1, Series B, 7.65%, 10/15/22                            Aaa/AAA          65,000          66,754
-----------------------------------------------------------------------------------------------------------
PR Industrial, Medical & Environmental PC
Facilities Tourist RB, Mennonite General
Hospital Project, Series A, 6.50%, 7/1/12                     NR/BBB-/BBB         590,000         563,008
-----------------------------------------------------------------------------------------------------------
PR Public Buildings Authority RB,
Government Facilities, Series B,
AMBAC Insured, 5%, 7/1/27                                         Aaa/AAA         300,000         259,548
-----------------------------------------------------------------------------------------------------------
Virgin Islands PFAU RB, Series A, 6.375%, 10/1/19                 NR/BBB-       1,515,000       1,489,958
                                                                                            ---------------
                                                                                                7,570,918
                                                                                            ---------------
Total Municipal Bonds and Notes (Cost $122,757,839)                                           119,792,735


===========================================================================================================
SHORT-TERM TAX-EXEMPT OBLIGATIONS--2.1%

CA PCFAU SWD RR RB, Shell Martinez
Refining, Series A, 3.15%, 3/1/00(6)                                            1,200,000       1,200,000
-----------------------------------------------------------------------------------------------------------
PR CMWLTH RB, Series 1025, 3.11%, 7/1/00(6)                                     1,400,000       1,400,000
                                                                                            ---------------
Total Short-Term Tax-Exempt Obligations (Cost $2,600,000)                                       2,600,000
-----------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS, AT VALUE (COST $125,357,839)                                     100.9%    122,392,735
-----------------------------------------------------------------------------------------------------------
LIABILITIES IN EXCESS OF OTHER ASSETS                                                (0.9)     (1,111,294)
                                                           ------------------------------------------------
NET ASSETS                                                                          100.0%   $121,281,441
                                                           ================================================
</TABLE>


             12   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>



FOOTNOTES TO STATEMENT OF INVESTMENTS


To simplify the listings of securities, abbreviations are used per the table
below:

CAP    Capital Appreciation
CDAU   Communities Development Authority
CFD    Community Facilities District
CMWLTH Commonwealth
COP    Certificates of Participation
ED     Economic Development
EU     Electric Utilities
FAU    Finance Authority
GOB    General Obligation Bonds
GORB   General Obligation Refunding Bonds
GOUN   General Obligation Unlimited Nts.
HF     Health Facilities
HFA    Housing Finance Agency
HTAU   Highway & Transportation Authority
MH     Multifamily Housing
MTAU   Metropolitan Transportation Authority
MUD    Municipal Utility District
PC     Pollution Control
PCFAU  Pollution Control Finance Authority
PFAU   Public Finance Authority
PPAU   Public Power Authority
PWBL   Public Works Board Lease
RA     Redevelopment Agency
RB     Revenue Bonds
RR     Resource Recovery
RRB    Revenue Refunding Bonds
SCDAU  Statewide Communities Development Authority
SDI    School District
SFM    Single Family Mtg.
SPAST  Special Assessment
SPTX   Special Tax
SWD    Solid Waste Disposal
TXAL   Tax Allocation
USD    Unified School District



1. Represents the current interest rate for a variable rate bond known as an
"inverse floater" which pays interest at a rate that varies inversely with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income. Their price may be more volatile than the price of a comparable
fixed-rate security. Inverse floaters amount to $15,085,775 or 12.44% of the
Fund's net assets as of February 29, 2000.
2. For zero coupon bonds, the interest rate shown is the effective yield on the
date of purchase.
3. Securities with an aggregate market value of $539,000 are held in
collateralized accounts to cover initial margin requirements on open futures
sales contracts. See Note 5 of Notes to Financial Statements.
4. Denotes a step bond: a zero coupon bond that converts to a fixed or variable
interest rate at a designated future date.
5. Represents securities sold under Rule 144A, which are exempt from
registration under the Securities Act of 1933, as amended. These securities have
been determined to be liquid under guidelines established by the Board of
Directors. These securities amount to $3,620,400 or 2.98% of the Fund's net
assets as of February 29, 2000.
6. Represents the current interest rate for a variable or increasing rate
security.


             13   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF INVESTMENTS  Unaudited / Continued
--------------------------------------------------------------------------------

FOOTNOTES TO STATEMENT OF INVESTMENTS Continued

AS OF FEBRUARY 29, 2000, SECURITIES SUBJECT TO THE ALTERNATIVE MINIMUM TAX
AMOUNT TO $26,463,144 OR 21.81% OF THE FUND'S NET ASSETS.

DISTRIBUTION OF INVESTMENTS BY INDUSTRY, AS A PERCENTAGE OF TOTAL INVESTMENTS AT
VALUE, IS AS FOLLOWS:

<TABLE>
<CAPTION>
 INDUSTRY                                               MARKET VALUE        PERCENT
-------------------------------------------------------------------------------------
<S>                                                      <C>                  <C>
 Special Assessment                                      $23,040,534           18.8%
 Single Family Housing                                    18,536,644           15.1
 Highways                                                 13,445,517           11.0
 General Obligation                                       10,602,336            8.7
 Electric Utilities                                       10,425,525            8.5
 Municipal Leases                                          8,561,834            7.0
 Sales Tax                                                 7,058,369            5.8
 Marine/Aviation Facilities                                6,044,703            4.9
 Hospital/Healthcare                                       4,408,954            3.6
 Water Utilities                                           4,270,110            3.5
 Not-for-Profit Organization                               3,627,551            3.0
 Pollution Control                                         3,310,480            2.7
 Resource Recovery                                         2,573,148            2.1
 Education                                                 2,551,859            2.1
 Adult Living Facilities                                   2,184,595            1.8
 Multifamily Housing                                         973,160            0.8
 Sewer Utilities                                             777,416            0.6
                                                        -----------------------------
 Total                                                  $122,392,735          100.0%
                                                        =============================
</TABLE>

 See accompanying Notes to Financial Statements.


             14   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF ASSETS AND LIABILITIES Unaudited
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>
February 29, 2000
============================================================================================
 ASSETS
<S>                                                                       <C>
 Investments, at value (cost $125,357,839)--see accompanying statement       $ 122,392,735
--------------------------------------------------------------------------------------------
 Cash                                                                              203,722
--------------------------------------------------------------------------------------------
 Receivables and other assets:
 Interest                                                                        1,512,032
 Shares of capital stock sold                                                      341,264
 Other                                                                               5,723
                                                                          ------------------
 Total assets                                                                  124,455,476

============================================================================================
 LIABILITIES

 Payables and other liabilities:
 Investments purchased                                                           2,657,160
 Dividends                                                                         330,520
 Shares of capital stock redeemed                                                  112,671
 Daily variation on futures contracts                                               11,500
 Distribution and service plan fees                                                 11,140
 Transfer and shareholder servicing agent fees                                       9,845
 Directors' compensation                                                               446
 Other                                                                              40,753
                                                                          ------------------
 Total liabilities                                                               3,174,035

============================================================================================
 NET ASSETS                                                                   $121,281,441
                                                                          ==================
============================================================================================
 COMPOSITION OF NET ASSETS

 Par value of shares of capital stock                                         $    104,257
--------------------------------------------------------------------------------------------
 Additional paid-in capital                                                    128,864,734
--------------------------------------------------------------------------------------------
 Overdistributed net investment income                                            (181,242)
--------------------------------------------------------------------------------------------
 Accumulated net realized loss on investment transactions                       (4,473,791)
--------------------------------------------------------------------------------------------
 Net unrealized depreciation on investments                                     (3,032,517)
                                                                          ------------------
 Net assets                                                                   $121,281,441
                                                                          ==================

============================================================================================
 NET ASSET VALUE PER SHARE

 Class A Shares:
 Net asset value and redemption price per share (based on net assets of
 $94,683,004 and 8,136,732 shares of capital stock outstanding)                     $11.64
 Maximum offering price per share (net asset value plus sales charge of
 4.75% of offering price)                                                           $12.22
--------------------------------------------------------------------------------------------
 Class B Shares:
 Net asset value, redemption price (excludes applicable contingent deferred
 sales charge) and offering price per share (based on net assets of $26,598,437
 and 2,288,907 shares of capital stock outstanding)                                 $11.62
</TABLE>


See accompanying Notes to Financial Statements.


             15   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENT OF OPERATIONS Unaudited
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
For the Six Months Ended February 29, 2000
====================================================================================
 INVESTMENT INCOME

<S>                                                                   <C>
 Interest                                                              $  4,015,472

====================================================================================
 EXPENSES

 Management fees                                                            362,042
------------------------------------------------------------------------------------
 Distribution and service plan fees:
 Class B                                                                    142,268
------------------------------------------------------------------------------------
 Transfer and shareholder servicing agent fees                               35,821
------------------------------------------------------------------------------------
 Shareholder reports                                                         22,178
------------------------------------------------------------------------------------
 Custodian fees and expenses                                                  6,007
------------------------------------------------------------------------------------
 Directors' compensation                                                      1,515
------------------------------------------------------------------------------------
 Other                                                                       11,207
                                                                       -------------
 Total expenses                                                             581,038
 Less reimbursement of expenses                                             (98,739)
 Less expenses paid indirectly                                               (5,768)
                                                                       -------------
 Net expenses                                                               476,531

====================================================================================
 NET INVESTMENT INCOME                                                    3,538,941

====================================================================================
 REALIZED AND UNREALIZED GAIN (LOSS)

 Net realized gain (loss) on:
 Investments                                                             (4,366,202)
 Closing of futures contracts                                                   528
                                                                       -------------
 Net realized loss                                                       (4,365,674)

------------------------------------------------------------------------------------
 Net change in unrealized appreciation or depreciation on investments    (2,236,087)
                                                                       -------------
 Net realized and unrealized loss                                        (6,601,761)

====================================================================================
 NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS                   $(3,062,820)
                                                                       =============
</TABLE>


See accompanying Notes to Financial Statements.


             16   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

STATEMENTS OF CHANGES IN NET ASSETS
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                   SIX MONTHS ENDED
                                                                  FEBRUARY 29, 2000                            YEAR ENDED
                                                                        (UNAUDITED)                       AUGUST 31, 1999
===========================================================================================================================
 OPERATIONS
<S>                                                                  <C>                                 <C>
 Net investment income                                                $   3,538,941                         $   6,760,089
---------------------------------------------------------------------------------------------------------------------------
 Net realized loss                                                       (4,365,674)                              (27,248)
---------------------------------------------------------------------------------------------------------------------------
 Net change in unrealized appreciation or depreciation                   (2,236,087)                           (9,255,882)
                                                                    -------------------------------------------------------
 Net decrease in net assets resulting from operations                    (3,062,820)                           (2,523,041)

===========================================================================================================================
 DIVIDENDS AND/OR DISTRIBUTIONS TO SHAREHOLDERS

 Dividends from net investment income:
 Class A                                                                 (2,805,389)                           (5,577,537)
 Class B                                                                   (630,746)                           (1,114,948)
---------------------------------------------------------------------------------------------------------------------------
 Distributions from net realized gain:
 Class A                                                                    (61,948)                                   --
 Class B                                                                    (17,172)                                   --

===========================================================================================================================
 CAPITAL STOCK TRANSACTIONS

 Net increase (decrease) in net assets resulting from capital stock
 transactions:
 Class A                                                                 (9,742,300)                            7,019,301
 Class B                                                                 (1,703,755)                            8,515,921

===========================================================================================================================
 NET ASSETS

 Total increase (decrease)                                              (18,024,130)                            6,319,696
---------------------------------------------------------------------------------------------------------------------------
 Beginning of period                                                    139,305,571                           132,985,875
                                                                    -------------------------------------------------------

 End of period (including overdistributed net investment
 income of $181,242 and $284,048, respectively)                        $121,281,441                          $139,305,571
                                                                    =======================================================
</TABLE>


See accompanying Notes to Financial Statements.


             17   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

FINANCIAL HIGHLIGHTS
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                  SIX MONTHS                                  YEAR                   YEAR
                                                       ENDED                                 ENDED                  ENDED
                                               FEB. 29, 2000                              AUG. 31,               JUNE 30,
 CLASS A                                         (UNAUDITED)     1999     1998     1997    1996(1)       1996        1995
===========================================================================================================================
<S>                                                 <C>      <C>      <C>      <C>        <C>        <C>          <C>
 PER SHARE OPERATING DATA

 Net asset value, beginning of period$              $  12.21  $ 13.02  $ 12.64  $ 12.16    $ 12.15    $ 12.09      $11.82
---------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
 Net investment income                                   .33      .65      .65      .73        .12        .73         .73
 Net realized and unrealized gain (loss)                (.57)    (.82)     .51      .49        .01        .07         .27
                                                    -----------------------------------------------------------------------
 Total income (loss) from
 investment operations                                  (.24)    (.17)    1.16     1.22        .13        .80        1.00
---------------------------------------------------------------------------------------------------------------------------
 Dividends and/or distributions to shareholders:
 Dividends from net investment income                   (.32)    (.64)    (.67)    (.74)      (.12)      (.73)       (.69)
 Dividends in excess of net
 investment income                                        --       --       --       --         --         --        (.04)
 Distributions from net realized gain                   (.01)      --     (.11)      --         --         --          --
 Distributions in excess of net realized gain             --       --       --       --         --       (.01)         --
                                                    -----------------------------------------------------------------------
 Total dividends and/or distributions
 to shareholders                                        (.33)    (.64)    (.78)    (.74)      (.12)      (.74)       (.73)
---------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                     $  11.64  $ 12.21  $ 13.02  $ 12.64    $ 12.16    $ 12.15     $ 12.09
                                                    =======================================================================

===========================================================================================================================
 TOTAL RETURN, AT NET ASSET VALUE(2)                   (1.99)%  (1.42)%   9.33%   10.24%      1.12%      6.73%       8.93%


===========================================================================================================================
 RATIOS/SUPPLEMENTAL DATA

 Net assets, end of period (in thousands)           $ 94,683 $109,575 $109,811  $89,991    $76,817    $76,913      $78,134

---------------------------------------------------------------------------------------------------------------------------
 Average net assets (in thousands)                  $103,345 $111,996 $ 99,678  $80,311    $77,584    $78,676      $76,148
---------------------------------------------------------------------------------------------------------------------------
 Ratios to average net assets:(3)
 Net investment income                                  5.61%    5.03%    5.04%    5.91%      6.00%      5.99%        6.27%
 Expenses                                               0.68%    0.67%    0.69%(4) 0.59%(4)   0.57%(4)   0.58%(4)     0.57%(4)
 Expenses, net of indirect expenses,
 voluntary assumption of expenses
 and/or waiver of expenses                              0.52%    0.51%    0.53%     N/A        N/A        N/A          N/A
---------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate(5)                               25%      25%      30%      46%         1%        33%          14%
</TABLE>



 1. For the two months ended August 31, 1996. The Fund changed its fiscal year
 end from June 30 to August 31.
 2. Assumes a $1,000 hypothetical initial investment on the business day before
 the first day of the fiscal period (or inception of offering), with all
 dividends and distributions reinvested in additional shares on the
 reinvestment date, and redemption at the net asset value calculated on the
 last business day of the fiscal period. Sales charges are not reflected in the
 total returns. Total returns are not annualized for periods of less than one
 full year.
 3. Annualized for periods of less than one full year.
 4. Expense ratio has not been grossed up to reflect the effect of expenses paid
 indirectly.
 5. The lesser of purchases or sales of portfolio securities for a period,
 divided by the monthly average of the market value of portfolio securities
 owned during the period. Securities with a maturity or expiration date at the
 time of acquisition of one year or less are excluded from the calculation.
 Purchases and sales of investment securities (excluding short-term securities)
 for the period ended February 29, 2000, were $32,355,072 and $43,971,448,
 respectively.

 See accompanying Notes to Financial Statements.


             18   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


<TABLE>
<CAPTION>

                                         SIX MONTHS                                           YEAR                    YEAR
                                              ENDED                                          ENDED                   ENDED
                                      FEB. 29, 2000                                       AUG. 31,                JUNE 30,
 CLASS B                                (UNAUDITED)         1999         1998      1997       1996(1)     1996        1995
===========================================================================================================================
<S>                                        <C>          <C>          <C>       <C>        <C>         <C>          <C>
 PER SHARE OPERATING DATA

 Net asset value, beginning of period$      $ 12.20      $ 13.01      $ 12.63   $ 12.14    $ 12.14     $ 12.08      $11.80
---------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
 Net investment income                          .27          .53          .54       .60        .10         .61         .62
 Net realized and unrealized gain (loss)       (.58)        (.83)         .49       .50         --         .07         .27
                                             ------------------------------------------------------------------------------
 Total income (loss) from
 investment operations                         (.31)        (.30)        1.03      1.10        .10         .68         .89
---------------------------------------------------------------------------------------------------------------------------
 Dividends and/or distributions to shareholders:
 Dividends from net investment income          (.26)        (.51)        (.54)     (.61)      (.10)       (.61)       (.57)
 Dividends in excess of net
 investment income                               --           --           --        --         --          --        (.04)
 Distributions from net realized gain          (.01)          --         (.11)       --         --          --          --
 Distributions in excess of net realized gain    --           --           --        --         --        (.01)         --
                                             ------------------------------------------------------------------------------
 Total dividends and/or distributions
 to shareholders                               (.27)        (.51)        (.65)     (.61)      (.10)       (.62)       (.61)
---------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period              $11.62      $ 12.20      $ 13.01   $ 12.63    $ 12.14     $ 12.14     $ 12.08
                                             =============================================================================

===========================================================================================================================
 TOTAL RETURN, AT NET ASSET VALUE(2)          (2.56)%      (2.41)%       8.24%     9.24%      0.85%       5.66%       7.90%
===========================================================================================================================
 RATIOS/SUPPLEMENTAL DATA

 Net assets, end of period (in thousands)   $26,598      $29,730      $23,175   $11,919     $5,928      $5,442      $2,648
---------------------------------------------------------------------------------------------------------------------------
 Average net assets (in thousands)          $28,682      $28,070      $18,087   $ 8,129     $5,767      $3,848      $1,904
---------------------------------------------------------------------------------------------------------------------------
 Ratios to average net assets:(3)
 Net investment income                         4.60%        4.02%        4.19%     4.85%      4.92%       4.94%       5.17%
 Expenses                                      1.68%        1.67%        1.70%(4)  1.60%(4)   1.62%(4)    1.60%(4)    1.55%(4)
 Expenses, net of indirect expenses,
 voluntary assumption of expenses
 and/or waiver of expenses                     1.52%        1.52%        1.53%       N/A       N/A         N/A         N/A
---------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate(5)                      25%          25%          30%       46%         1%         33%         14%
</TABLE>




 1. For the two months ended August 31, 1996. The Fund changed its fiscal year
 end from June 30 to August 31.
 2. Assumes a $1,000 hypothetical initial investment on the business day before
 the first day of the fiscal period (or inception of offering), with all
 dividends and distributions reinvested in additional shares on the
 reinvestment date, and redemption at the net asset value calculated on the
 last business day of the fiscal period. Sales charges are not reflected in the
 total returns. Total returns are not annualized for periods of less than one
 full year.
 3. Annualized for periods of less than one full year.
 4. Expense ratio has not been grossed up to reflect the effect of expenses paid
 indirectly.
 5. The lesser of purchases or sales of portfolio securities for a period,
 divided by the monthly average of the market value of portfolio securities
 owned during the period. Securities with a maturity or expiration date at the
 time of acquisition of one year or less are excluded from the calculation.
 Purchases and sales of investment securities (excluding short-term securities)
 for the period ended February 29, 2000, were $32,355,072 and $43,971,448,
 respectively.

 See accompanying Notes to Financial Statements.


             19   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

NOTES TO FINANCIAL STATEMENTS  Unaudited
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
1. SIGNIFICANT ACCOUNTING POLICIES

 Oppenheimer Main Street California Municipal Fund (the Fund) is a separate
 series of Oppenheimer Main Street Funds, Inc., an open-end management
 investment company registered under the Investment Company Act of 1940, as
 amended. The Fund's investment objective is to seek as high a level of current
 income exempt from federal and California personal income taxes as is available
 from investing in municipal securities while attempting to preserve capital.

       The Fund offers Class A and Class B shares. Class A shares are sold at
 their offering price, which is normally net asset value plus an initial sales
 charge. Class B shares are sold without an initial sales charge but may be
 subject to a contingent deferred sales charge (CDSC). Both classes of shares
 have identical rights to earnings, assets and voting privileges, except that
 each class has its own expenses directly attributable to that class and
 exclusive voting rights with respect to matters affecting that class. Classes A
 and B shares have separate distribution and/or service plans. Class B shares
 will automatically convert to Class A shares six years after the date of
 purchase. The following is a summary of significant accounting policies
 consistently followed by the Fund.
--------------------------------------------------------------------------------
 SECURITIES VALUATION. Securities for which quotations are readily available are
 valued at the last sale price, or if in the absence of a sale, at the last sale
 price on the prior trading day if it is within the spread of the closing bid
 and asked prices, and if not, at the closing bid price. Securities (including
 restricted securities) for which quotations are not readily available are
 valued primarily using dealer-supplied valuations, a portfolio pricing service
 authorized by the Board of Directors, or at their fair value. Fair value is
 determined in good faith under consistently applied procedures under the
 supervision of the Board of Directors. Foreign currency contracts are valued
 based on the closing prices of the forward currency contract rates in the
 London foreign exchange markets on a daily basis as provided by a reliable
 bank, dealer or pricing service. Short-term "money market type" debt securities
 with remaining maturities of sixty days or less are valued at cost (or last
 determined market value) and adjusted for amortization or accretion to maturity
 of any premium or discount.
--------------------------------------------------------------------------------
 ALLOCATION OF INCOME, EXPENSES, GAINS AND LOSSES. Income, expenses (other than
 those attributable to a specific class), gains and losses are allocated daily
 to each class of shares based upon the relative proportion of net assets
 represented by such class. Operating expenses directly attributable to a
 specific class are charged against the operations of that class.
--------------------------------------------------------------------------------
 FEDERAL TAXES. The Fund intends to continue to comply with provisions of the
 Internal Revenue Code applicable to regulated investment companies and to
 distribute all of its taxable income, including any net realized gain on
 investments not offset by loss carryovers, to shareholders. Therefore, no
 federal income or excise tax provision is required.


             20   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


--------------------------------------------------------------------------------
 DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to
 shareholders, which are determined in accordance with income tax regulations,
 are recorded on the ex-dividend date.
--------------------------------------------------------------------------------
 CLASSIFICATION OF DISTRIBUTIONS TO SHAREHOLDERS. Net investment income (loss)
 and net realized gain (loss) may differ for financial statement and tax
 purposes. The character of distributions made during the year from net
 investment income or net realized gains may differ from its ultimate
 characterization for federal income tax purposes. Also, due to timing of
 dividend distributions, the fiscal year in which amounts are distributed may
 differ from the fiscal year in which the income or realized gain was recorded
 by the Fund.
-------------------------------------------------------------------------------
 EXPENSE OFFSET ARRANGEMENTS. Expenses paid indirectly represent a reduction of
 custodian fees for earnings on cash balances maintained by the Fund.
--------------------------------------------------------------------------------
 OTHER. Investment transactions are accounted for as of trade date. Original
 issue discount is accreted and premium is amortized in accordance with federal
 income tax requirements. For municipal bonds acquired after April 30, 1993, on
 disposition or maturity, taxable ordinary income is recognized to the extent of
 the lesser of gain or market discount that would have accrued over the holding
 period. Realized gains and losses on investments and unrealized appreciation
 and depreciation are determined on an identified cost basis, which is the same
 basis used for federal income tax purposes.

       There are certain risks arising from geographic concentration in any
 state. Certain revenue or tax related event in a state may impair the ability
 of certain issuers of municipal securities to pay principal and interest on
 their obligations.

       The preparation of financial statements in conformity with generally
 accepted accounting principles requires management to make estimates and
 assumptions that affect the reported amounts of assets and liabilities and
 disclosure of contingent assets and lia-bilities at the date of the financial
 statements and the reported amounts of income and expenses during the reporting
 period. Actual results could differ from those estimates.


             21   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

NOTES TO FINANCIAL STATEMENTS  Unaudited/Continued
-------------------------------------------------------------------------------

===============================================================================
 2. CAPITAL STOCK

 The Fund has authorized 16,250,000 shares of $.01 par value capital stock of
 each class. Transactions in shares of capital stock were as follows:
<TABLE>
<CAPTION>
                        SIX MONTHS ENDED FEB. 29, 2000   YEAR ENDED AUGUST 31, 1999
                                 SHARES         AMOUNT        SHARES         AMOUNT
------------------------------------------------------------------------------------
<S>                       <C>             <C>           <C>           <C>
 CLASS A
 Sold                           613,011   $  7,294,081     1,681,985  $  21,674,388
 Dividends and/or
 distributions reinvested       156,641      1,860,329       281,702      3,627,456
 Redeemed                    (1,604,909)   (18,896,710)   (1,423,149)   (18,282,543)
                             -------------------------------------------------------

 Net increase (decrease)       (835,257)  $ (9,742,300)      540,538  $   7,019,301
                             =======================================================

------------------------------------------------------------------------------------
 CLASS B
 Sold                          301,538    $ 3,575,996       964,557   $  12,473,622
 Dividends and/or
 distributions reinvested       40,181        476,304        59,086         758,691
 Redeemed                     (490,459)    (5,756,055)     (367,694)     (4,716,392)
                              ------------------------------------------------------

 Net increase (decrease)      (148,740)   $(1,703,755)      655,949   $   8,515,921
                              ======================================================
</TABLE>
--------------------------------------------------------------------------------
 3. UNREALIZED GAINS AND LOSSES ON SECURITIES

 As of February 29, 2000, net unrealized depreciation on securities of
 $2,965,104 was composed of gross appreciation of $2,208,024, and gross
 depreciation of $5,173,128.
--------------------------------------------------------------------------------
 4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES

 MANAGEMENT FEES. Management fees paid to the Manager were in accordance with
 the investment advisory agreement with the Fund which provides for a fee of
 0.55% of average annual net assets if the Fund's net assets are $100 million or
 more (it is reduced if assets are less). The Manager has voluntarily undertaken
 to limit its fees to 0.40% of average annual net assets if the Fund's assets
 are $100 million or more. The Manager can terminate or amend that undertaking
 at any time. The Fund's management fee for the six months ended February 29,
 2000 was 0.40% of average annual net assets for each class of shares, after
 giving affect to the waiver, annualized for periods of less than one full year.
--------------------------------------------------------------------------------
 TRANSFER AGENT FEES. OppenheimerFunds Services (OFS), a division of the
 Manager, is the transfer and shareholder servicing agent for the Fund and for
 other Oppenheimer funds. OFS's total costs of providing such services are
 allocated ratably to these funds.
--------------------------------------------------------------------------------
 DISTRIBUTION AND SERVICE PLAN FEES. Under its General Distributor's Agreement
 with the Manager, the Distributor acts as the Fund's principal underwriter in
 the continuous public offering of the different classes of shares of the Fund.


             22   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

 The compensation paid to (or retained by) the Distributor from the sale of
 shares or on the redemption of shares is shown in the table below for the
 period indicated.

<TABLE>
<CAPTION>
                                     AGGREGATE             CLASS A        COMMISSIONS      COMMISSIONS
                                     FRONT-END           FRONT-END         ON CLASS A       ON CLASS B
                                 SALES CHARGES       SALES CHARGES             SHARES           SHARES
                                    ON CLASS A         RETAINED BY        ADVANCED BY      ADVANCED BY
 SIX MONTHS ENDED                       SHARES         DISTRIBUTOR       DISTRIBUTOR(1)   DISTRIBUTOR(1)
--------------------------------------------------------------------------------------------------------------------------
<S>                                <C>                  <C>               <C>              <C>
 February 29, 2000                    $112,866             $12,970            $10,000         $125,396
</TABLE>

 1. The Distributor advances commission payments to dealers for certain sales of
 Class A shares and for sales of Class B shares from its own resources at the
 time of sale.

<TABLE>
<CAPTION>
                                                   CLASS A                  CLASS B
                                       CONTINGENT DEFERRED      CONTINGENT DEFERRED
                                             SALES CHARGES            SALES CHARGES
 SIX MONTHS ENDED                  RETAINED BY DISTRIBUTOR  RETAINED BY DISTRIBUTOR
---------------------------------------------------------------------------------------------------------------------------
<S>                              <C>                        <C>
 February 29, 2000                                  $1,790                  $71,303
</TABLE>

       The Fund has adopted a Service Plan for Class A shares and a Distribution
 and Service Plan for Class B shares under Rule 12b-1 of the Investment Company
 Act. Under those plans the Fund pays the Distributor for all or a portion of
 its costs incurred in connection with the distribution and/or servicing of the
 shares of the particular class.
--------------------------------------------------------------------------------
 CLASS B DISTRIBUTION AND SERVICE PLAN FEE. Under the plan, service fees and
 distribution fees are computed on the average of the net asset value of shares
 in the respective class, determined as of the close of each regular business
 day during the period. The Class B plan provides for the Distributor to be
 compensated at a flat rate, whether the Distributor's distribution expenses are
 more or less than the amounts paid by the Fund under the plan during the period
 for which the fee is paid.

       The Distributor retains the asset-based sales charge on Class B shares.
 The asset-based sales charges on Class B shares allows investors to buy shares
 without a front-end sales charge while allowing the Distributor to compensate
 dealers that sell those shares.

       The Distributor's actual expenses in selling Class B shares may be more
 than the payments it receives from the contingent deferred sales charges
 collected on redeemed shares and asset-based sales charges from the Fund under
 the plans. If the plan is terminated by the Fund, the Board of Trustees may
 allow the Fund to continue payments of the asset-based sales charge to the
 Distributor for distributing shares before the plan was terminated. The plan
 allows for the carry-forward of distribution expenses, to be recovered from
 asset-based sales charges in subsequent fiscal periods.

 Distribution fees paid to the Distributor for the six months ended February 29,
 2000, were as follows:

<TABLE>
<CAPTION>
                                                                      DISTRIBUTOR'S        DISTRIBUTOR'S
                                                                          AGGREGATE         UNREIMBURSED
                                                                       UNREIMBURSED        EXPENSES AS %
                         TOTAL PAYMENTS    AMOUNT RETAINED                 EXPENSES        OF NET ASSETS
                             UNDER PLAN     BY DISTRIBUTOR               UNDER PLAN             OF CLASS
---------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                  <C>                  <C>                        <C>
 Class B Plan                  $142,268           $118,005               $1,081,288                 4.07%
</TABLE>


             23   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
NOTES TO FINANCIAL STATEMENTS  Unaudited/Continued
-------------------------------------------------------------------------------

-------------------------------------------------------------------------------
5. FUTURES CONTRACTS

 The Fund may buy and sell futures contracts in order to gain exposure to or to
 seek to protect against changes in interest rates. The Fund may also buy or
 write put or call options on these futures contracts.

       The Fund generally sells futures contracts to hedge against increases in
 interest rates and the resulting negative effect on the value of fixed rate
 portfolio securities. The Fund may also purchase futures contracts to gain
 exposure to changes in interest rates as it may be more efficient or cost
 effective than actually buying fixed income securities.

       Upon entering into a futures contract, the Fund is required to deposit
 either cash or securities (initial margin) in an amount equal to a certain
 percentage of the contract value. Subsequent payments (variation margin) are
 made or received by the Fund each day. The variation margin payments are equal
 to the daily changes in the contract value and are recorded as unrealized gains
 and losses. The Fund may recognize a realized gain or loss when the contract is
 closed or expires.

       Securities held in collateralized accounts to cover initial margin
 requirements on open futures contracts are noted in the Statement of
 Investments. The Statement of Assets and Liabilities reflects a receivable
 and/or payable for the daily mark to market for variation margin.

       Risks of entering into futures contracts (and related options) include
 the possibility that there may be an illiquid market and that a change in the
 value of the contract or option may not correlate with changes in the value of
 the underlying securities.

<TABLE>
<CAPTION>
                             EXPIRATION      NUMBER OF   VALUATION AS OF       UNREALIZED
 CONTRACT DESCRIPTION              DATE      CONTRACTS   FEBRUARY 29, 2000   DEPRECIATION
-----------------------------------------------------------------------------------------
<S>                           <C>               <C>     <C>             <C>
 CONTRACTS TO PURCHASE
 Muni Bond                      3/22/00            92      $8,514,462          $67,413
</TABLE>

--------------------------------------------------------------------------------
 6. BANK BORROWINGS

 The Fund may borrow from a bank for temporary or emergency purposes including,
 without limitation, funding of shareholder redemptions provided asset coverage
 for borrowings exceeds 300%. The Fund has entered into an agreement which
 enables it to participate with other Oppenheimer funds in an unsecured line of
 credit with a bank, which permits borrowings up to $400 million, collectively.
 Interest is charged to each fund, based on its borrowings, at a rate equal to
 the Federal Funds Rate plus 0.45%. Borrowings are payable 30 days after such
 loan is executed. The Fund also pays a commitment fee equal to its pro rata
 share of the average unutilized amount of the credit facility at a rate of
 0.08% per annum.

       The Fund had no borrowings outstanding during the six months ended
February 29, 2000.
--------------------------------------------------------------------------------
 7. SUBSEQUENT EVENT

 As of April 1, 2000, the Manager withdrew its voluntary undertaking to limit
 its management fees to a maximum annual rate of 0.40%.


             24   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
OPPENHEIMER MAIN STREET(R) CALIFORNIA MUNICIPAL FUND
--------------------------------------------------------------------------------
A Series of Oppenhemer Main Street Funds, Inc.
================================================================================
 OFFICERS AND DIRECTORS  James C. Swain, Director and Chairman of the Board
                         Bridget A. Macaskill, Director and President
                         Robert G. Avis, Director
                         William A. Baker, Director
                         George C. Bowen, Director
                         Jon S. Fossel, Director
                         Sam Freedman, Director
                         Raymond J. Kalinowski, Director
                         C. Howard Kast, Director
                         Robert M. Kirchner, Director
                         Ned M. Steel, Director
                         Christian D. Smith, Vice President
                         Andrew J. Donohue, Vice President and Secretary
                         Brian W. Wixted, Treasurer
                         Robert J. Bishop, Assistant Treasurer
                         Scott T. Farrar, Assistant Treasurer
                         Robert G. Zack, Assistant Secretary
================================================================================
 INVESTMENT ADVISOR      OppenheimerFunds, Inc.

================================================================================
 DISTRIBUTOR             OppenheimerFunds Distributor, Inc.
================================================================================
 TRANSFER AND            OppenheimerFunds Services
 SHAREHOLDER SERVICING
 AGENT
================================================================================
 CUSTODIAN OF            The Bank of New York
 PORTFOLIO SECURITIES
================================================================================
 INDEPENDENT AUDITORS    Deloitte & Touche LLP
================================================================================
 LEGAL COUNSEL           Myer, Swanson, Adams & Wolf, P.C.

                         The financial statements included herein
                         have been taken from the records of the Fund without
                         examination of those records by the independent
                         auditors.
                         This is a copy of a report to shareholders
                         of Oppenheimer Main Street California Municipal Fund.
                         This report must be preceded or accompanied by a
                         Prospectus of Oppenheimer Main Street California
                         Municipal Fund. For material information concerning
                         the Funds, see the Prospectus.

                         SHARES OF OPPENHEIMER FUNDS ARE NOT DEPOSITS OR
                         OBLIGATIONS OF ANY BANK, ARE NOT GUARANTEED BY ANY
                         BANK, ARE NOT INSURED BY THE FDIC OR ANY OTHER AGENCY,
                         AND INVOLVE INVESTMENT RISKS, INCLUDING THE POSSIBLE
                         LOSS OF THE PRINCIPAL AMOUNT INVESTED.


             25  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

INFORMATION AND SERVICES
--------------------------------------------------------------------------------

As an Oppenheimer fund shareholder, you can benefit from special services
designed to make investing simple. Whether it's automatic investment plans,
timely market updates, or immediate account access, you can count on us whenever
you need assistance. So call us today, or visit our website--we're here to help.

--------------------------------------------------------------------------------
INTERNET
24-hr access to account information and transactions
WWW.OPPENHEIMERFUNDS.COM
--------------------------------------------------------------------------------
GENERAL INFORMATION
Mon-Fri 8:30am-9pm ET, Sat 10am-4pm ET
1.800.525.7048
--------------------------------------------------------------------------------
TELEPHONE TRANSACTIONS
Mon-Fri 8:30am-9pm ET, Sat 10am-4pm ET
1.800.852.8457
--------------------------------------------------------------------------------
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24-hr automated information and automated transactions
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--------------------------------------------------------------------------------
TELECOMMUNICATIONS DEVICE FOR THE DEAF (TDD)
Mon-Fri 8:30am-7pm ET
1.800.843.4461
--------------------------------------------------------------------------------
OPPENHEIMERFUNDS INFORMATION HOTLINE
24 hours a day, timely and insightful messages on the economy and issues that
may affect your investments
1.800.835.3104
--------------------------------------------------------------------------------
TRANSFER AND SHAREHOLDER SERVICING AGENT
OppenheimerFunds Services
P.O. Box 5270, Denver, CO 80217-5270
--------------------------------------------------------------------------------

                                                              [OPPENHEIMER LOGO]
                                                               Distributor, Inc.

RS0725.001.0200  April 28, 2000


<PAGE>


                          ANNUAL REPORT AUGUST 31, 1999

                                   OPPENHEIMER

                                 MAIN STREET(R)
                            CALIFORNIA MUNICIPAL FUND

                                     [PHOTO]

                           [OPPENHEIMERFUNDS LOGO]
                           THE RIGHT WAY TO INVEST

<PAGE>
CONTENTS

 3   President's Letter

 5   An Interview
     with Your Fund's
     Manager

 9   Fund Performance

12   FINANCIAL STATEMENTS

28   INDEPENDENT
     AUDITORS' REPORT

29   Federal Income
     Tax Information

30   Officers and
     Directors

31   OppenheimerFunds
     Family

32   Information and
     Services


REPORT HIGHLIGHTS
--------------------------------------------------------------------------------

IN STARK CONTRAST TO U.S. TREASURY SECURITIES, municipal bond prices were
generally stable throughout the reporting period.

OUR RESEARCH-INTENSIVE SECURITY SELECTION STRATEGY helped us find areas of
opportunity and helped avoid potential problems.

AVERAGE ANNUAL
TOTAL RETURNS
For the 1-Year Period Ended 8/31/99*
<TABLE>
<CAPTION>
CLASS A
Without         With
Sales Chg.      Sales Chg.
--------------------------
<S>             <C>
-1.42%          -6.11%
</TABLE>

<TABLE>
<CAPTION>
CLASS B
Without         With
Sales Chg.      Sales Chg.
--------------------------

<S>             <C>
-2.41%          -7.10%
</TABLE>

NOT FDIC INSURED.
NO BANK GUARANTEE.
MAY LOSE VALUE.
* See page 11 for further details.


             2  Oppenheimer Main Street California Municipal Fund

<PAGE>

PRESIDENT'S LETTER

[PHOTO]

JAMES C. SWAIN
Chairman
Oppenheimer
Main Street California
Municipal Fund

[PHOTO]

BRIDGET A. MACASKILL
President
Oppenheimer
Main Street California
Municipal Fund

DEAR SHAREHOLDER,

In many ways, the 1999 investment environment has, so far, unfolded as many
expected it would, producing both attractive opportunities and formidable
challenges for investors.

     On the economic front, early worries about the effects of global weakness
in the wake of last year's credit and currency crises have abated. Instead, as
many economies around the world begin to strengthen, concerns now center around
whether the U.S. economy may be growing too quickly. Throughout the year,
consumers in the United States have continued to spend and borrow heavily, more
than offsetting any temporary slowdown in the industrial and export sectors.

     The economy's strength has not gone unnoticed by the nation's monetary
policymakers. In an effort to ward off emerging inflationary pressures, the
Federal Reserve Board increased short-term interest rates this past summer.

     Market reaction to robust economic growth has been mixed. The U.S. bond
market has generally declined, as fixed income investors became increasingly
concerned about the effects of rising interest rates.

     In the stock market, the performance of large-capitalization growth stocks,
which has driven the market's advance over the past few years, has begun to
moderate, and many previously out-of-favor value-oriented, mid-cap and small-cap
stocks have rallied. At the same time, a healthy percentage of actively managed
diversified portfolios have once again begun to outperform unmanaged stock
indices such as Standard & Poor's 500.


              3  Oppenheimer Main Street California Municipal Fund


<PAGE>
PRESIDENT'S LETTER

At OppenheimerFunds, we applaud the Fed's pre-emptive strike against inflation.
In our view, history has repeatedly demonstrated that most financial assets do
best in a low-inflation environment. What's more, we believe that the move to
higher interest rates should be temporary.

     One recent development is quite troublesome to us however: the increasing
popularity of "day trading" among individuals seeking to make fast money in a
volatile stock market. In our opinion, day trading is not investing, it is
gambling. Experience proves that without extensive research and analysis,
attempting to time short-term price swings is a fool's errand. Instead, we
continue to encourage investors to maintain a long-term perspective that is
measured in years, not days.

     Finally, while we remain alert to the potential impact of the Y2K issue, we
are encouraged by the progress made in addressing the matter. At
OppenheimerFunds, our shareholder accounting systems are already Y2K compliant,
and we have successfully participated in all required industrywide tests. We
intend to continue retesting our systems in order to help further protect
against any potential problems. After all, whether in our computer accounting
systems or the financial markets, managing risk is an important part of what
makes OppenheimerFunds The Right Way to Invest.

Sincerely,

/s/ JAMES C. SWAIN                      /s/ BRIDGET A. MACASKILL

James C. Swain                         Bridget A. Macaskill
September 22, 1999



              4  Oppenheimer Main Street California Municipal Fund


<PAGE>
AN INTERVIEW WITH YOUR FUND'S MANAGER

[PHOTO]

PORTFOLIO MANAGEMENT
TEAM (L TO R)
Bob Patterson
Caryn Halbrecht
(Portfolio Manager)


HOW DID OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND PERFORM DURING THE
ONE-YEAR PERIOD THAT ENDED AUGUST 31, 1999?

A. In a rapidly changing investment environment, the Fund continued to provide
investors with current income that was exempt from federal and California income
taxes. Market conditions in late 1998 and early 1999 were, in many respects,
direct opposites of each other. The final months of 1998 were generally
characterized by recessionary economic conditions throughout much of the world,
declining interest rates in the United States and less restrictive monetary
policies worldwide. In contrast, 1999 has seen signs of global economic
recovery, rising domestic interest rates and, ultimately, a tighter monetary
policy in the United States.

HOW DID THESE ECONOMIC CONDITIONS AFFECT CALIFORNIA'S MUNICIPAL BOND MARKET?

In stark contrast to U.S. Treasury securities, municipal bond prices were
remarkably stable throughout the one-year reporting period. In the first half of
the period, global economic uncertainty triggered a "flight to quality" among
U.S. and foreign investors. This created unprecedented demand for U.S. Treasury
securities, driving their prices up and their yields down (prices and yields
move in opposite directions). However, because municipal bonds do not provide
tax advantages to foreign investors, municipals did not benefit to the same
extent. As a result, U.S. Treasury securities significantly outperformed
triple-A rated municipal bonds with comparable maturities.

               5  Oppenheimer Main Street California Municipal Fund


<PAGE>
AN INTERVIEW WITH YOUR FUND'S MANAGER


"MUNICIPAL BONDS ENDURED SIGNIFICANTLY LESS VOLATILITY THAN OTHER HIGH-QUALITY,
FIXED INCOME SECURITIES OVER THE PAST YEAR."

In the second half of the reporting period, while municipal bonds remained
stable, prices of U.S. Treasury securities declined sharply. As the economy grew
stronger, investors appeared to regain some of their confidence and sold many
Treasury bonds in order to return to riskier financial assets such as stocks and
corporate bonds. Consequently, municipal bonds provided higher total returns
than U.S. Treasuries during the past twelve months.

        In our opinion, municipal bonds' relative stability is the result of
supply-and-demand factors. Strong economic conditions in California reduced many
municipalities' need to borrow, leading to a modestly diminished supply of tax
exempt bonds. Yet, demand remained high from investors seeking to minimize their
income tax liabilities. This supply-and-demand relationship helped support the
stability of California's municipal bond prices and yields.

DID YOU FIND COMPELLING VALUES IN THIS MARKET ENVIRONMENT?

Yes. Long-term, tax exempt municipal bond yields have been high relative to
yields of long-term, taxable U.S. Treasury securities during the past twelve
months. In fact, by mid-1999, California municipal bond yields were more than
90% of comparable Treasury yields. As a result, we believe that California
municipal bonds have provided excellent after-tax values compared to historical
norms during this period.

               6  Oppenheimer Main Street California Municipal Fund
<PAGE>

AVERAGE ANNUAL
TOTAL RETURNS
For the Periods Ended 9/30/99(1)

<TABLE>
<CAPTION>
------------------------------
Class A              Since
1-Year     5-Year    Inception
------------------------------
<S>        <C>       <C>
-8.02%     5.73%     6.56%

Class B              Since
1-Year     5-Year    Inception
------------------------------
-9.00%     5.37%     3.69%

------------------------------
</TABLE>

<TABLE>
<CAPTION>
STANDARDIZED YIELDS(2)
For the 30 Days Ended 8/31/99
------------------------------
<S>                  <C>
Class A              5.01%
------------------------------
Class B              4.25
------------------------------
</TABLE>

HOW DID YOU MANAGE THE FUND IN THIS ENVIRONMENT?

We attempted to manage the risks of changing interest rates and emphasized those
sectors of the municipal bond market that we expected to benefit most from
prevailing economic and market conditions. This strategy led us to areas of
opportunity that we believed would benefit from California's growing population,
including residential land development and adult living facilities. Residential
land development bonds finance much of the basic infrastructure for new housing
construction. Adult living facilities are residential housing projects designed
to meet the unique demands of a growing population of aging Americans who want
amenities tailored to their lifestyles.

     Our strategy also led us to generally avoid certain issuers, such as
hospitals, which have been subject to financial pressures because of an
unfavorable regulatory and legislative environment, including cutbacks in
Medicaid and Medicare. We also tended to avoid bonds issued by utilities that
are in the midst of industrywide deregulation.

     Throughout the reporting period, we mostly targeted a neutral average
duration--which is a measure of sensitivity to changes in interest rates. When
interest rates declined in 1998, our neutral position constrained performance
slightly compared to portfolios with longer durations. However, when interest
rates rose in 1999, our neutral position helped shelter the portfolio from some
of the impact affecting investors who had previously adopted a longer, more
aggres-sive duration strategy.

1. See page 11 for further details.

2. Standardized yield is based on net investment income for the 30-day period
ended August 31, 1999. Falling share prices will tend to artificially raise
yields.

              7  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

<PAGE>

CREDIT ALLOCATION(3)
[PIE CHART]

<TABLE>
<S>                     <C>
- AAA                   50.5%
- AA                    12.1
- A                     13.4
- BBB                   21.9
- BB                     2.1
</TABLE>


WHAT IS YOUR OUTLOOK FOR THE MUNICIPAL BOND MARKET AND THE FUND?

We remain cautiously optimistic. First, we believe that municipal bonds are
attractively valued relative to comparable taxable securities, and should
benefit as that relationship returns to more normal levels. Second, California
has benefited greatly from the recent strength of the U.S. economy, which has
enabled many of its municipalities to put their fiscal houses in good order.
This should help reduce some of the risk of credit downgrades.

     On the other hand, we remain concerned about rising interest rates.
Accordingly, we intend to continue to monitor the economic environment
carefully. If the economy continues to grow at an unsustainable rate, we may
position the portfolio to reduce the adverse effects of potentially higher
interest rates. We believe that these credit-conscious, risk manage-ment
strategies make Oppenheimer Main Street California Municipal Fund an important
part of The Right Way to Invest.

<TABLE>
<CAPTION>
TOP FIVE INDUSTRIES(4)
(Percentage of market value)
----------------------------------------------------------------------------
<S>                                                                 <C>
Special Assessment                                                   19.6%
----------------------------------------------------------------------------
Single Family Housing                                                 17.9
----------------------------------------------------------------------------
Highways                                                              12.6
----------------------------------------------------------------------------
General Obligation                                                    10.4
----------------------------------------------------------------------------
Municipal Leases                                                       6.3
----------------------------------------------------------------------------
</TABLE>

3. Portfolio data are as of August 31, 1999, are dollar-weighted based on
invested assets and are subject to change. The Fund may invest up to 25% of its
assets in below-investment-grade securities which carry greater risk of default.
Securities rated by any rating organization are included in the equivalent
Standard & Poor's rating category. Average credit quality and allocation include
rated securities and those not rated by a national rating organization
(currently 9.50% of total investments) but to which the Manager in its judgment
has assigned ratings as securities comparable to those rated by a rating agency
in the same category.

4. Industry weightings are as of August 31, 1999, and are subject to change.

               8 Oppenheimer Main Street California Municipal Fund

<PAGE>

FUND PERFORMANCE

HOW HAS THE FUND PERFORMED? Below is a discussion, by the Manager, of the Fund's
performance during its fiscal year ended August 31, 1999, followed by a
graphical comparison of the Fund's performance to an appropriate broad-based
market index.

MANAGEMENT'S DISCUSSION OF PERFORMANCE. During the Fund's fiscal year that
ended August 31, 1999, Oppenheimer Main Street California Municipal Fund's
performance was negatively impacted by the performance of the overall bond
market, which weakened considerably in 1999. The weakness in the bond market
stemmed from signs of continuing strong economic growth, which could cause
inflation to reemerge. However, the Fund benefited from a reduced supply of new
tax exempt bond issues relative to robust demand from investors seeking to
manage their income tax liabilities. This reduction in issuance was primarily a
result of strong economic conditions throughout the United States, which helped
curtail California's need to borrow. In this environment, the Fund continued to
adhere to its longstanding strategy of holding a diversified portfolio of
municipal bonds selected after extensive research into their issuers' credit
quality. The Fund's portfolio holdings, allocations and strategies are subject
to change.

COMPARING THE FUND'S PERFORMANCE TO THE MARKET. The graphs that follow show the
performance of a hypothetical $10,000 investment in each class of shares of the
Fund held from the inception of the class until August 31, 1999. In the case of
Class A shares, performance is measured from the inception of the class on May
18, 1990. In the case of Class B shares, performance is measured from the
inception of the class on October 29, 1993. The Fund's performance reflects the
deduction of the maximum initial sales charge on Class A shares and the
applicable contingent deferred sales charge for Class B shares. The graphs
assume that all dividends and capital gains distributions were reinvested in
additional shares.

     Because the Fund invests in a variety of municipal securities, the Fund's
performance is compared to that of the Lehman Brothers Municipal Bond Index, an
unmanaged index of a broad range of investment grade municipal bonds that is
widely regarded as a measure of the performance of the general municipal bond
market. Index performance reflects the reinvestment of income but does not
consider the effect of capital gains or transaction costs, and none of the data
in the graphs that follow shows the effect of taxes. Also, the Fund's
performance reflects the effect of Fund business and operating expenses. While
index comparisons may be useful to provide a benchmark for the Fund's
performance, it must be noted that the Fund's investments are not limited to the
securities in any one index.


               9 Oppenheimer Main Street California Municipal Fund

<PAGE>

FUND PERFORMANCE

CLASS A SHARES
COMPARISON OF CHANGE IN VALUE OF $10,000 HYPOTHETICAL INVESTMENTS IN:
Oppenheimer Main Street California Municipal Fund (Class A) and Lehman Brothers
Municipal Bond Index

[The following table was originally a line graph in the printed materials.]

<TABLE>
<CAPTION>
          Oppenheimer    Lehman Brothers
          Main Street    Municipal Bond
          California         Index
           Municipal
         Fund (Class A)
<S>         <C>             <C>
5/18/90   $  9,525        $ 10,000
6/30/90      9,711          10,088
6/30/91     10,482          10,997
6/30/92     11,657          12,292
6/30/93     13,098          13,762
6/30/94     13,020          13,785
6/30/95     14,182          15,001
6/30/96     15,135          15,997
8/31/96     15,304          16,138
8/31/97     16,872          17,630
8/31/98     18,446          19,155
8/31/99     18,184          19,251
</TABLE>

AVERAGE ANNUAL TOTAL RETURN OF CLASS A SHARES OF THE FUND AT 8/31/99(2)
1-Year -6.11%     5-Year 5.44%     Life 6.65%

CLASS B SHARES
COMPARISON OF CHANGE IN VALUE OF $10,000 HYPOTHETICAL INVESTMENTS IN:
Oppenheimer Main Street California Municipal Fund (Class B) and Lehman Brothers
Municipal Bond Index

[The following table was originally a line graph in the printed materials.]
<TABLE>
<CAPTION>
          Oppenheimer    Lehman Brothers
          Main Street    Municipal Bond
          California         Index
           Municipal
         Fund (Class B)
<S>        <C>              <C>
10/29/93   $10,000        $ 10,000
 6/30/94     9,458           9,671
 6/30/95    10,205          10,524
 6/30/96    10,782          11,223
 8/31/96    10,874          11,322
 8/31/97    11,878          12,368
 8/31/98    12,855          13,438
 8/31/99    12,452          13,505
</TABLE>

AVERAGE ANNUAL TOTAL RETURN OF CLASS B SHARES OF THE FUND AT 8/31/99(2)
1 Year -7.10%     5 Year 5.09%     Life 3.83%

The performance information for the Lehman Brothers Municipal Bond Index in the
graphs begins on 5/31/90 for Class A and 10/31/93 for Class B.

1. The Fund changed its fiscal year end from 6/30 to 8/31.
2. See page 11 for further details.

Past performance is not predictive of future performance. Graphs are not drawn
to the same scale.

             10 Oppenheimer Main Street California Municipal Fund
<PAGE>

NOTES

IN REVIEWING PERFORMANCE AND RANKINGS, PLEASE REMEMBER THAT PAST PERFORMANCE
DOES NOT GUARANTEE FUTURE RESULTS. INVESTMENT RETURN AND PRINCIPAL VALUE OF AN
INVESTMENT IN THE FUND WILL FLUCTUATE SO THAT AN INVESTOR'S SHARES, WHEN
REDEEMED, MAY BE WORTH MORE OR LESS THAN THE ORIGINAL COST. THE FUND'S
PERFORMANCE MAY FROM TIME TO TIME BE SUBJECT TO SUBSTANTIAL SHORT-TERM CHANGES,
PARTICULARLY DURING PERIODS OF MARKET OR INTEREST RATE VOLATILITY. FOR UPDATES
ON THE FUND'S PERFORMANCE, PLEASE CONTACT YOUR FINANCIAL ADVISOR, CALL US AT
1.800.525.7048 OR VISIT OUR WEBSITE, WWW.OPPENHEIMERFUNDS.COM.

Total returns and the ending account values in the graphs include changes in
share price and reinvestment of dividends and capital gains distributions in a
hypothetical investment for the periods shown.

CLASS A shares were first publicly offered on 5/18/90. Class A returns include
the current maximum initial sales charge of 4.75%. The Fund's maximum sales
charge for Class A shares was lower prior to 11/2/91, so actual performance may
have been higher.

CLASS B shares of the Fund were first publicly offered on 10/29/93. Class B
returns include the applicable contingent deferred sales charge of 5% (1-year)
and 1% (since inception). Class B shares are subject to an annual 0.75%
asset-based sales charge. The ending account value shown in the graph is net of
the applicable 1% contingent deferred sales charge.

An explanation of the different performance calculations is in the Fund's
prospectus.

              11  Oppenheimer Main Street California Municipal Fund

<PAGE>

STATEMENT OF INVESTMENTS August 31, 1999

<TABLE>
<CAPTION>
                                                                 RATINGS:
                                                                 MOODY'S/                                 MARKET
                                                                S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)          AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
 MUNICIPAL BONDS AND NOTES--98.8%
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>               <C>                  <C>
 CALIFORNIA--90.6%
 Anaheim, CA PFAU TXAL RB, MBIA Insured,
 Inverse Floater, 9.37%, 12/28/18(1)                              Aaa/AAA         $1,000,000           $1,167,500
------------------------------------------------------------------------------------------------------------------
 Berkeley, CA HF RRB, Alta Bates Medical Center,
 Prerefunded, Series A, 6.50%, 12/1/11                              A2/NR          1,500,000            1,609,740
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, American
 Baptist Homes, Series A, 6.20%, 10/1/27                           NR/BBB          1,790,000            1,782,804
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Episcopal
 Homes Foundation, 5.125%, 7/1/18                                   NR/A-          1,500,000            1,383,975
------------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Rhonda
 Haas Goldman Plaza, 5.125%, 5/15/23                               NR/AA-            700,000              638,218
------------------------------------------------------------------------------------------------------------------
 CA CDAU Lease RB, United Airlines,
 Series A, 5.70%, 10/1/33                                        Baa3/BB+          3,200,000            2,976,064
------------------------------------------------------------------------------------------------------------------
 CA CDAU MH RB, Village Riviera Hills,
 Series E, 5.45%, 2/1/25                                           NR/AAA          1,000,000            1,003,830
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RB, Sr. Lien, Prerefunded,
 Series A, 6.50%, 1/1/32                                    Baa3/BBB-/BBB          1,400,000            1,557,892
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RRB, Zero Coupon, 5.98%, 1/15/21(2)              Baa3/BBB-/BBB          5,000,000            1,343,350
------------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency
 Toll Road RRB, Zero Coupon, 6%, 1/15/22(2)                 Baa3/BBB-/BBB          5,500,000            1,387,705
------------------------------------------------------------------------------------------------------------------
 CA GOB, 5%, 10/1/27                                          Aa3/AA-/AA-          3,000,000            2,721,030
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM Purchase RB, Series A-2, 6.45%, 8/1/25                Aaa/AAA          2,340,000            2,416,752
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series A, Cl. I, 5.40%, 8/1/26                    Aaa/AAA          1,810,000            1,674,829
------------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series C, 6.75%, 2/1/25                           Aa2/AA-          4,790,000            4,963,254
------------------------------------------------------------------------------------------------------------------
 CA Infrastructure & ED Bank RB,
 American Center for Wine Food Arts, 5.55%, 12/1/12               NR/A/A           1,710,000            1,697,962
------------------------------------------------------------------------------------------------------------------
 CA PCFAU RB, Pacific Gas & Electric Co. Project,
 Series B, 6.35%, 6/1/09                                           A1/AA-          2,000,000            2,139,500
------------------------------------------------------------------------------------------------------------------
 CA PWBL RB, State Prison Department of
 Corrections, Series E, FSA Insured, 5.50%, 6/1/15            Aaa/AAA/AAA          2,000,000            2,038,960
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series A, 5.75%, 12/1/29                                          NR/AAA          1,905,000            1,999,793
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series B, 7.75%, 9/1/26                                           NR/AAA            920,000            1,001,770

</TABLE>

              12  Oppenheimer Main Street California Municipal Fund
<PAGE>

<TABLE>
<CAPTION>
                                                                 RATINGS:
                                                                 MOODY'S/                                 MARKET
                                                                S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)          AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>               <C>                  <C>
 CALIFORNIA Continued
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series B-5, 6.35%, 12/1/29                                        NR/AAA         $1,470,000           $1,548,007
------------------------------------------------------------------------------------------------------------------
 CA Rural Home Mtg. FAU SFM RB,
 Mtg.-Backed Securities Program,
 Series D, Cl. 5, 6.70%, 5/1/29                                    NR/AAA          1,890,000            2,057,983
------------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, The Internext Group, 5.375%, 4/1/17                 NR/BBB          3,000,000            2,794,770
------------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, The Internext Group, 5.375%, 4/1/30                 NR/BBB          1,500,000            1,348,110
------------------------------------------------------------------------------------------------------------------
 CA SCDAU Revenue Refunding COP,
 Inverse Floater, 7.63%, 11/1/15(1)                                 A1/NR          1,200,000            1,101,000
------------------------------------------------------------------------------------------------------------------
 Central CA Joint Powers Health FAU COP,
 Community Hospitals of Central California
 Project, 5%, 2/1/23                                              Baa1/NR            285,000              247,451
------------------------------------------------------------------------------------------------------------------
 Contra Costa Cnty., CA SPTX RRB,
 CFD 91-1, 5.58%, 8/1/16                                            NR/NR          3,075,000            2,916,853
------------------------------------------------------------------------------------------------------------------
 Corona, CA SFM RB, Sub. Lien,
 Series B, 6.30%, 11/1/28                                           A2/NR            800,000              823,472
------------------------------------------------------------------------------------------------------------------
 Escondido, CA Union High SDI CAP GOB,
 MBIA Insured, Zero Coupon, 6.20%, 11/1/19(2)                     Aaa/AAA          2,000,000              636,960
------------------------------------------------------------------------------------------------------------------
 Fontana, CA RA TXAL GORB,
 Jurupa Hills Redevelopment Project,
 Prerefunded, Series A, 7.10%, 10/1/23                            NR/BBB+          1,960,000            2,164,389
------------------------------------------------------------------------------------------------------------------
 Fontana, CA RA TXAL Refunding Bonds,
 Jurupa Hills Redevelopment Project,
 Series A, 5.50%, 10/1/19                                         NR/BBB+          1,185,000            1,130,253
------------------------------------------------------------------------------------------------------------------
 Fresno, CA HAU MH RB, Central Valley
 Coalition Projects, Series A, 5.60%, 8/1/30                       NR/AAA          3,075,000            3,107,472
------------------------------------------------------------------------------------------------------------------
 Fresno, CA USD GORB, Series A,
 MBIA Insured, 6.55%, 8/1/20                                  Aaa/AAA/AAA          1,225,000            1,366,353
------------------------------------------------------------------------------------------------------------------
 Fresno, CA USD GOUN, Series A,
 MBIA Insured, 6.40%, 8/1/16                                  Aaa/AAA/AAA          1,000,000            1,108,490
------------------------------------------------------------------------------------------------------------------
 Irvine, CA Improvement Bond Act 1915
 SPAST Bonds, Assessment District No. 94-13,
 Group 2, 5.875%, 9/2/17                                            NR/NR          1,250,000            1,212,225
------------------------------------------------------------------------------------------------------------------
 Irvine, CA Improvement Bonds Act 1915 RB,
 Assessment District 95-12, 6%, 9/2/21                              NR/NR          1,750,000            1,709,295
------------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA PFAU TXAL Bonds,
 Series A, 5.50%, 9/1/30                                           NR/BBB          2,500,000            2,290,650
------------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA School FAU RRB,
 Horsethief Canyon, 5.35%, 9/1/10                                   NR/NR          1,015,000              972,664
------------------------------------------------------------------------------------------------------------------
 Las Virgenes, CA USD CAP Bonds, Series A,
 MBIA Insured, Zero Coupon, 4.95%, 11/1/12(2)                 Aaa/AAA/AAA          2,095,000            1,044,714
</TABLE>

              13 Oppenheimer Main Street California Municipal Fund

<PAGE>

STATEMENT OF INVESTMENTS (Continued)

<TABLE>
<CAPTION>
                                                                 RATINGS:
                                                                 MOODY'S/                                 MARKET
                                                                S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)          AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>               <C>                  <C>
 CALIFORNIA Continued
 Long Beach, CA Harbor RRB, Series A,
 FGIC Insured, 6%, 5/15/10                                        Aaa/AAA        $   500,000          $   533,960
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney
 Parking Project, Zero Coupon, 6.95%, 9/1/11(2)               Baa1/BBB/A-          2,340,000            1,198,384
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney
 Parking Project, Zero Coupon, 5.67%, 9/1/16(2)              Baa1/BBB /A-          1,745,000              631,934
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, FSA Insured, 5%, 7/1/12                            Aaa/AAA/AAA          2,000,000            1,974,700
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, FSA Insured, 5%, 7/1/19                            Aaa/AAA/AAA          2,000,000            1,862,880
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA MTAU Sales Tax RRB,
 Series A, MBIA Insured, 5.25%, 7/1/15                        Aaa/AAA/AAA          2,000,000            1,970,000
------------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA Public Works FAU RRB,
 Regional Park & Open Space District,
 Series A, 5%, 10/1/16                                             Aa3/AA          1,900,000            1,804,620
------------------------------------------------------------------------------------------------------------------
 Los Angeles, CA USD GOB, Series A,
 FGIC Insured, 6%, 7/1/15                                     Aaa/AAA/AAA          1,000,000            1,069,300
------------------------------------------------------------------------------------------------------------------
 Los Angeles, CA USD GOB, Series B,
 FGIC Insured, 5%, 7/1/23                                     Aaa/AAA/AAA          2,000,000            1,824,640
------------------------------------------------------------------------------------------------------------------
 Palmdale, CA Civic Authority RRB,
 Merged Redevelopment Project,
 Prerefunded, Series A, 6.60%, 9/1/34                             Aaa/AAA            595,000              666,317
------------------------------------------------------------------------------------------------------------------
 Palmdale, CA Civic Authority RRB,
 Merged Redevelopment Project,
 Unrefunded Balance, Series A, 6.60%, 9/1/34                      Aaa/AAA            405,000              429,029
------------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Refunding Bonds,
 Los Medanos Community Development Project,
 Sub. Lien, 6.20%, 8/1/19                                          NR/BBB          1,000,000            1,027,890
------------------------------------------------------------------------------------------------------------------
 Pomona, CA SFM RRB, Escrowed to Maturity,
 Series A, 7.60%, 5/1/23                                          Aaa/AAA          2,500,000            3,079,700
------------------------------------------------------------------------------------------------------------------
 Pomona, CA USD GORB, Series A,
 MBIA Insured, 6.15%, 8/1/15                                      Aaa/AAA            500,000              539,920
------------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 FGIC Insured, Inverse Floater, 7.97%, 6/1/19(1)              Aaa/AAA/AAA          1,150,000            1,160,062
------------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 MBIA Insured, Inverse Floater, 9.01%, 7/8/22(1)                  Aaa/AAA            500,000              590,625
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
 Prerefunded, 7.55%, 9/1/17                                         NR/NR          1,500,000            1,586,280
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA PFAU TXAL RRB,
 Redevelopment Projects, Series A, 5.625%, 10/1/33              Baa2/BBB-          1,650,000            1,580,106
------------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA SFM RB, Escrowed to Maturity,
 Series A, 7.80%, 5/1/21                                          Aaa/AAA          1,000,000            1,269,860
</TABLE>

              14 Oppenheimer Main Street California Municipal Fund

<PAGE>




<TABLE>
<CAPTION>
                                                                 RATINGS:
                                                                 MOODY'S/                                 MARKET
                                                                S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)          AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>               <C>                  <C>
 CALIFORNIA Continued
 Riverside, CA PFAU Lease RB, AMBAC Insured,
 5.25%, 10/1/17                                               Aaa/AAA/AAA         $2,100,000           $2,046,093
------------------------------------------------------------------------------------------------------------------
 Sacramento Cnty., CA SFM RB,
 Escrowed to Maturity, 8%, 7/1/16(3)                              Aaa/AAA          2,810,000            3,576,315
------------------------------------------------------------------------------------------------------------------
 Sacramento, CA MUD Electric RRB,
 FGIC Insured, Inverse Floater, 9.375%, 8/15/18(1)            Aaa/AAA/AAA          1,500,000            1,674,375
------------------------------------------------------------------------------------------------------------------
 Sacramento, CA Cogeneration Authority RRB,
 MBIA Insured, 5.25%, 7/1/12                                  Aaa/AAA/AAA            250,000              251,935
------------------------------------------------------------------------------------------------------------------
 Salinas Valley, CA Solid Waste Authority RB,
 5.80%, 8/1/27                                                   Baa3/BBB          1,665,000            1,584,414
------------------------------------------------------------------------------------------------------------------
 San Diego Cnty., CA Water Authority
 Revenue COP, Prerefunded, Series 91-B,
 MBIA Insured, Inverse Floater, 8.87%, 4/8/21(1)                  Aaa/AAA          1,000,000            1,197,500
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA Bay Area Rapid Transit District
 Sales Tax RRB, AMBAC Insured, 6.75%, 7/1/11                  Aaa/AAA/AAA          1,000,000            1,153,350
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. International
 Airport Commission RB, Second Series Issue 13-B,
 MBIA Insured, 8%, 5/1/07                                         Aaa/AAA          1,140,000            1,353,864
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. International
 Airport Commission RB, Second Series Issue 14-A,
 MBIA Insured, 8%, 5/1/07                                         Aaa/AAA          1,290,000            1,532,004
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. RA Lease RB, CAP,
 George R. Moscone Project, Zero Coupon,
 5.36%, 7/1/10(2)                                                A1/A-/A+          4,500,000            2,533,185
------------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. Redevelopment
 FAU TXAL CAP Refunding Bonds, Redevelopment
 Projects, Series C, Zero Coupon, 5.20%, 8/1/13(2)                   A2/A          2,350,000            1,055,479
------------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road CAP RRB, Series A, 0%/5.75%, 1/15/21(4)          Baa3/BBB-/BBB          3,200,000            1,971,968
------------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road RB, Sr. Lien, Prerefunded, 6.75%, 1/1/32           Aaa/AAA/AAA          3,500,000            3,844,225
------------------------------------------------------------------------------------------------------------------
 San Ysidro, CA SDI GOB,
 AMBAC Insured, 6.125%, 8/1/21                                    Aaa/AAA            700,000              747,635
------------------------------------------------------------------------------------------------------------------
 South Orange Cnty., CA PFAU SPTX RB,
 Foothill Area, Series C, FGIC Insured, 8%, 8/15/08           Aaa/AAA/AAA          1,500,000            1,845,420
------------------------------------------------------------------------------------------------------------------
 Southern CA Home FAU SFM RB,
 Series A, 7.35%, 9/1/24                                           NR/AAA            185,000              190,936
------------------------------------------------------------------------------------------------------------------
 Southern CA Metropolitan Water District
 Waterworks RB, Series A, 5%, 7/1/26                               Aa2/AA          1,000,000              911,320
------------------------------------------------------------------------------------------------------------------
 Southern CA Metropolitan Water District
 Waterworks RRB, Inverse Floater, 7.42%, 10/30/20(1)               Aa2/AA          1,200,000            1,152,000
</TABLE>

              15 Oppenheimer Main Street California Municipal Fund

<PAGE>



STATEMENT OF INVESTMENTS (Continued)


<TABLE>
<CAPTION>
                                                                 RATINGS:
                                                                 MOODY'S/                                 MARKET
                                                                S&P/FITCH             FACE                 VALUE
                                                               (UNAUDITED)          AMOUNT            SEE NOTE 1
------------------------------------------------------------------------------------------------------------------
<S>                                                         <C>               <C>                  <C>
 California Continued
 Southern CA PPAU Transmission Project RB,
 Inverse Floater, 7.615%, 7/1/12(1)                                Aa3/A+         $2,100,000        $   2,299,500
------------------------------------------------------------------------------------------------------------------
 Stanislaus, CA Waste-To-Energy Financing Agency
 Solid Waste Facilities RRB,
 Ogden Martin System, Inc.
 Project, 7.50%, 1/1/05                                             NR/A-          1,285,000            1,321,430
------------------------------------------------------------------------------------------------------------------
 Suisun City, CA PFAU TXAL RB, Suisun City
 Redevelopment Project, Series A, 5.20%, 10/1/28                    NR/A-          2,500,000            2,278,875
------------------------------------------------------------------------------------------------------------------
 Temecula, CA CFD No. 88-12-A SPTX Refunding Bonds,
 5.625%, 9/1/17                                                     NR/NR            535,000              506,629
------------------------------------------------------------------------------------------------------------------
 West Covina, CA COP, Queen of the Valley Hospital,
 Prerefunded, 6.50%, 8/15/19                                        A2/NR          1,120,000            1,248,363
                                                                                                    -------------
                                                                                                      126,163,061

------------------------------------------------------------------------------------------------------------------
 U.S. POSSESSIONS--8.2%
 PR CMWLTH GOB, 5.375%, 7/1/25                                     Baa1/A          1,650,000            1,574,595
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH GORB, MBIA Insured,
 Inverse Floater, 8.08%, 7/1/08(1)                                Aaa/AAA          1,500,000            1,620,000
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RB,
 Inverse Floater, 6.75%, 7/1/28(1,5)                                NR/NR          5,000,000            4,165,800
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RRB, Series A,
 AMBAC Insured, 5.50%, 7/1/13                                 Aaa/AAA/AAA          1,500,000            1,543,140
------------------------------------------------------------------------------------------------------------------
 PR CMWLTH HTAU RRB, Series A,
 AMBAC Insured, 5.50%, 7/1/14                                 Aaa/AAA/AAA          1,500,000            1,537,410
------------------------------------------------------------------------------------------------------------------
 PR Housing Finance Corp. SFM RB,
 Portfolio 1, Series B, 7.65%, 10/15/22                           Aaa/AAA            125,000              129,595
------------------------------------------------------------------------------------------------------------------
 PR Industrial, Medical & Environmental PC
 Facilities Tourist RB, Mennonite General
 Hospital Project, Series A, 6.50%, 7/1/12                    NR/BBB-/BBB            590,000              603,446
------------------------------------------------------------------------------------------------------------------
 PR Public Buildings Authority RB,
 Government Facilities, Series B,
 AMBAC Insured, 5%, 7/1/27                                        Aaa/AAA            300,000              275,337
                                                                                                    -------------
                                                                                                       11,449,323

------------------------------------------------------------------------------------------------------------------
 TOTAL INVESTMENTS, AT VALUE (COST $138,482,564)                                        98.8%         137,612,384
------------------------------------------------------------------------------------------------------------------
 OTHER ASSETS NET OF LIABILITIES                                                         1.2            1,693,187
                                                                                     -----------------------------
 NET ASSETS                                                                            100.0%        $139,305,571
                                                                                     =============================
</TABLE>

              16 Oppenheimer Main Street California Municipal Fund
<PAGE>


FOOTNOTES TO STATEMENT OF INVESTMENTS

To simplify the listings of securities, abbreviations are used per the table
below:
<TABLE>
<S>       <C>                                            <C>     <C>
 CAP      Capital Appreciation                           MUD     Municipal Utility District
 CDAU     Communities Development Authority              PCFAU   Pollution Control Finance Authority
 CFD      Community Facilities District                  PFAU    Public Finance Authority
 CMWLTH   Commonwealth                                   PPAU    Public Power Authority
 COP      Certificates of Participation                  PWBL    Public Works Board Lease
 ED       Economic Development                           RA      Redevelopment Agency
 FAU      Finance Authority                              RB      Revenue Bonds
 GOB      General Obligation Bonds                       RRB     Revenue Refunding Bonds
 GORB     General Obligation Refunding Bonds             SCDAU   Statewide Communities Development Authority
 GOUN     General Obligation Unlimited Nts.              SDI     School District
 HAU      Housing Authority                              SFM     Single Family Mtg.
 HF       Health Facilities                              SPAST   Special Assessment
 HFA      Housing Finance Agency                         SPTX    Special Tax
 HTAU     Highway & Transportation Authority             TXAL    Tax Allocation
 MH       Multifamily Housing                            USD     Unified School District
 MTAU     Metropolitan Transportation Authority
</TABLE>

1. Represents the current interest rate for a variable rate bond known as an
"inverse floater" which pays interest at a rate that varies inversely with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income. Their price may be more volatile than the price of a comparable
fixed-rate security. Inverse floaters amount to $16,128,362 or 11.58% of the
Fund's net assets as of August 31, 1999.

2. For zero coupon bonds, the interest rate shown is the effective yield on the
date of purchase.

3. Securities with an aggregate market value of $559,992 are held in
collateralized accounts to cover initial margin requirements on open futures
sales contracts. See Note 5 of Notes to Financial Statements.

4. Denotes a step bond: a zero coupon bond that converts to a fixed or variable
interest rate at a designated future date.

5. Represents securities sold under Rule 144A, which are exempt from
registration under the Securities Act of 1933, as amended. These securities have
been determined to be liquid under guidelines established by the Board of
Directors. These securities amount to $4,165,800 or 2.99% of the Fund's net
assets as of August 31, 1999.

AS OF AUGUST 31, 1999, SECURITIES SUBJECT TO THE ALTERNATIVE MINIMUM TAX AMOUNT
TO $34,930,607 OR 25.07% OF THE FUND'S NET ASSETS.

DISTRIBUTION OF INVESTMENTS BY INDUSTRY OF ISSUE, AS A PERCENTAGE OF TOTAL
INVESTMENTS AT VALUE, IS AS FOLLOWS:

<TABLE>
<CAPTION>
 INDUSTRY                                             MARKET VALUE             PERCENT
---------------------------------------------------------------------------------------
<S>                                                   <C>                        <C>
 Special Assessment                                  $ 26,947,089                 19.6%
 Single Family Housing                                 24,732,266                 17.9
 Highways                                              17,351,490                 12.6
 General Obligation                                    14,253,636                 10.4
 Municipal Leases                                       8,723,894                  6.3
 Sales Tax                                              8,056,275                  5.9
 Adult Living Facilities                                7,947,877                  5.8
 Electric Utilities                                     5,976,498                  4.3
 Pollution Control                                      5,115,564                  3.7
 Hospital/Healthcare                                    4,810,001                  3.5
 Multifamily Housing                                    4,111,302                  3.0
 Marine/Aviation Facilities                             3,419,828                  2.5
 Water Utilities                                        3,260,820                  2.4
 Resource Recovery                                      2,905,844                  2.1
                                                    -----------------------------------

 Total                                               $137,612,384                100.0%
                                                    ===================================
</TABLE>



 See accompanying Notes to Financial Statements.

              17 Oppenheimer Main Street California Municipal Fund
<PAGE>


 STATEMENT OF ASSETS AND LIABILITIES  August 31, 1999

<TABLE>
<CAPTION>
==================================================================================================================
 ASSETS

<S>                                                                                                 <C>
 Investments, at value (cost $138,482,564)--see accompanying statement                              $ 137,612,384
------------------------------------------------------------------------------------------------------------------
 Cash                                                                                                     357,087
------------------------------------------------------------------------------------------------------------------
 Receivables and other assets:
 Investments sold                                                                                       2,007,893
 Interest                                                                                               1,763,865
 Shares of capital stock sold                                                                             214,653
 Other                                                                                                      1,446
                                                                                              --------------------
 Total assets                                                                                         141,957,328

==================================================================================================================
 LIABILITIES

 Payables and other liabilities:

 Investments purchased                                                                                  1,981,263
 Dividends                                                                                                372,159
 Shares of capital stock redeemed                                                                         213,863
 Shareholder reports                                                                                       37,183
 Distribution and service plan fees                                                                        12,740
 Transfer and shareholder servicing agent fees                                                              9,707
 Daily variation on futures contracts--Note 5                                                               6,438
 Other                                                                                                     18,404
                                                                                               -------------------
 Total liabilities                                                                                      2,651,757

==================================================================================================================

 NET ASSETS                                                                                          $139,305,571
                                                                                               ===================

==================================================================================================================
 COMPOSITION OF NET ASSETS

 Par value of shares of capital stock                                                                $    114,096
------------------------------------------------------------------------------------------------------------------
 Additional paid-in capital                                                                           140,300,950
------------------------------------------------------------------------------------------------------------------
 Overdistributed net investment income                                                                   (284,048)
------------------------------------------------------------------------------------------------------------------
 Accumulated net realized loss on investment transactions                                                 (28,997)
------------------------------------------------------------------------------------------------------------------
 Net unrealized depreciation on investments--Notes 3 and 5                                               (796,430)
                                                                                               -------------------
 Net assets                                                                                          $139,305,571
                                                                                               ===================

==================================================================================================================
 NET ASSET VALUE PER SHARE

 Class A Shares:
 Net asset value and redemption price per share (based on net assets of
 $109,575,128 and 8,971,989 shares of capital stock outstanding)                                           $12.21
 Maximum offering price per share (net asset value plus sales charge
 of 4.75% of offering price)                                                                               $12.82
------------------------------------------------------------------------------------------------------------------
 Class B Shares:
 Net asset value, redemption price (excludes applicable contingent deferred
 sales charge) and offering price per share (based on net assets of $29,730,443
 and 2,437,647 shares of capital stock outstanding)                                                        $12.20


</TABLE>

 See accompanying Notes to Financial Statements.

              18 Oppenheimer Main Street California Municipal Fund
<PAGE>
STATEMENT OF OPERATIONS  For the Year Ended August 31, 1999

<TABLE>
<CAPTION>
<S>                                                                             <C>
===============================================================================================
INVESTMENT INCOME
Interest                                                                          $  7,761,775

===============================================================================================
EXPENSES
Management fees--Note 4                                                                770,241
-----------------------------------------------------------------------------------------------
Distribution and service plan fees--Note 4:
Class B                                                                                280,483
-----------------------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees--Note 4                                   80,248
-----------------------------------------------------------------------------------------------
Shareholder reports                                                                     44,221
-----------------------------------------------------------------------------------------------
Registration and filing fees:
Class A                                                                                 11,266
Class B                                                                                  4,659
-----------------------------------------------------------------------------------------------
Legal, auditing and other professional fees                                             11,998
-----------------------------------------------------------------------------------------------
Custodian fees and expenses                                                              8,823
-----------------------------------------------------------------------------------------------
Insurance expenses                                                                       2,818
-----------------------------------------------------------------------------------------------
Directors' compensation                                                                  2,304
-----------------------------------------------------------------------------------------------
Other                                                                                    2,779
                                                                                ---------------
Total expenses                                                                       1,219,840
Less expenses paid indirectly--Note 1                                                   (8,088)
Less reimbursement of expenses by OppenheimerFunds, Inc.--Note 4                      (210,066)
                                                                                ---------------
Net expenses                                                                         1,001,686
===============================================================================================
NET INVESTMENT INCOME                                                                6,760,089

===============================================================================================
REALIZED AND UNREALIZED GAIN (LOSS)

Net realized gain (loss) on:
Investments                                                                           (235,961)
Closing of futures contracts                                                           208,713
                                                                                ---------------
Net realized loss                                                                      (27,248)

-----------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation on investments                (9,255,882)
                                                                                ---------------
Net realized and unrealized loss                                                    (9,283,130)

===============================================================================================
NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS                               $(2,523,041)
                                                                                ===============
</TABLE>

See accompanying Notes to Financial Statements.



             19   OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>




STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
YEAR ENDED AUGUST 31,                                                          1999            1998
=======================================================================================================
<S>                                                                    <C>              <C>
OPERATIONS
Net investment income                                                   $   6,760,089   $   5,785,304
-------------------------------------------------------------------------------------------------------
Net realized loss                                                             (27,248)       (147,181)
-------------------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation                      (9,255,882)      4,576,330
                                                                       --------------------------------

Net increase (decrease) in net assets resulting from operations            (2,523,041)     10,214,453

=======================================================================================================
DIVIDENDS AND/OR DISTRIBUTIONS TO SHAREHOLDERS

Dividends from net investment income:
Class A                                                                    (5,577,537)     (5,113,266)
Class B                                                                    (1,114,948)       (736,400)
-------------------------------------------------------------------------------------------------------
Distributions from net realized gain:
Class A                                                                            --        (802,490)
Class B                                                                            --        (131,382)

=======================================================================================================
CAPITAL STOCK TRANSACTIONS

Net increase in net assets resulting from
capital stock transactions--Note 2:
Class A                                                                     7,019,301      16,887,977
Class B                                                                     8,515,921      10,757,185

=======================================================================================================
NET ASSETS
Total increase                                                              6,319,696      31,076,077
-------------------------------------------------------------------------------------------------------
Beginning of period                                                       132,985,875     101,909,798
                                                                       --------------------------------
End of period (including overdistributed net investment
income of $284,048 and $351,652, respectively)                           $139,305,571    $132,985,875
                                                                       ================================
</TABLE>



See accompanying Notes to Financial Statements.

             20  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>



FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
                                                                                           Year                    Year
                                                                                          Ended                   Ended
                                                                                      August 31,                June 30,
Class A                                                 1999       1998       1997       1996(1)      1996         1995
=========================================================================================================================
<S>                                                <C>         <C>        <C>        <C>        <C>          <C>
PER SHARE OPERATING DATA

Net asset value, beginning of period                  $13.02      $12.64     $12.16     $12.15      $12.09       $11.82
-------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                    .65         .65        .73        .12         .73          .73
Net realized and unrealized gain (loss)                 (.82)        .51        .49        .01         .07          .27
                                                     --------------------------------------------------------------------

Total income (loss) from
investment operations                                   (.17)       1.16       1.22        .13         .80         1.00
-------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                    (.64)       (.67)     (.74)       (.12)       (.73)        (.69)
Dividends in excess of
net investment income                                     --          --         --         --          --         (.04)
Distributions from net realized gain                      --        (.11)        --         --          --           --
Distributions in excess of net realized gain              --          --         --         --        (.01)          --
                                                     --------------------------------------------------------------------
Total dividends and distributions
to shareholders                                         (.64)       (.78)     (.74)      (.12)       (.74)        (.73)
-------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                        $12.21      $13.02    $12.64     $12.16      $12.15       $12.09
                                                     ====================================================================

=========================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                    (1.42)%      9.33%    10.24%      1.12%       6.73%        8.93%

=========================================================================================================================
RATIOS/SUPPLEMENTAL DATA

Net assets, end of period (in thousands)            $109,575    $109,811   $89,991    $76,817     $76,913      $78,134
-------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                   $111,996    $ 99,678   $80,311    $77,584     $78,676      $76,148
-------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                   5.03%       5.04%     5.91%      6.00%       5.99%        6.27%
Expenses, before voluntary assumption
and indirect expenses                                   0.67%       0.69%(4)  0.59%(4)   0.57%(4)    0.58%(4)    0.57%(4)
Expenses, after voluntary assumption
and indirect expenses                                   0.51%       0.53%       N/A       N/A          N/A         N/A
-------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                25%         30%       46%         1%         33%         14%
</TABLE>


1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000 hypothetical initial investment on the business day before
the first day of the fiscal period (or inception of offering), with all
dividends and distributions reinvested in additional shares on the reinvestment
date, and redemption at the net asset value calculated on the last business day
of the fiscal period. Sales charges are not reflected in the total returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The lesser of purchases or sales of portfolio securities for a period,
divided by the monthly average of the market value of portfolio securities
owned during the period. Securities with a maturity or expiration date at the
time of acquisition of one year or less are excluded from the calculation.
Purchases and sales of investment securities (excluding short-term securities)
for the period ended August 31, 1999 were $48,357,555 and $35,079,315,
respectively.

See accompanying Notes to Financial Statements.

             21  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>

FINANCIAL HIGHLIGHTS Continued


<TABLE>
<CAPTION>
                                                                                                   YEAR                    YEAR
                                                                                                  ENDED                   ENDED
                                                                                              AUGUST 31,                JUNE 30,
CLASS B                                              1999           1998            1997         1996(1)        1996       1995
----------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>              <C>           <C>           <C>        <C>
PER SHARE OPERATING DATA
Net asset value, beginning of period              $13.01          $12.63          $12.14        $12.14        $12.08     $11.80
----------------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                .53             .54             .60           .10           .61        .62
Net realized and unrealized gain (loss)             (.83)            .49             .50            --           .07        .27
                                                  --------------------------------------------------------------------------------
Total income (loss) from
investment operations                               (.30)           1.03            1.10           .10           .68        .89
----------------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                (.51)          (.54)            (.61)         (.10)         (.61)      (.57)
Dividends in excess of
net investment income                                 --             --               --            --            --       (.04)
Distributions from net realized gain                  --           (.11)              --            --            --         --
Distributions in excess of net realized gain          --             --               --            --          (.01)        --
                                                  --------------------------------------------------------------------------------
Total dividends and distributions
to shareholders                                     (.51)          (.65)           (.61)          (.10)         (.62)      (.61)
----------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                    $12.20         $13.01          $12.63         $12.14        $12.14     $12.08
                                                  ================================================================================

==================================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                (2.41)%         8.24%           9.24%          0.85%         5.66%      7.90%

==================================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)         $29,730        $23,175         $11,919         $5,928        $5,442     $2,648
----------------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                $28,070        $18,087         $ 8,129         $5,767        $3,848     $1,904
----------------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                               4.02%          4.19%           4.85%          4.92%         4.94%      5.17%
Expenses, before voluntary assumption
and indirect expenses                               1.67%          1.70%(4)        1.60%(4)       1.62%(4)      1.60%(4)  1.55%(4)
Expenses, after voluntary assumption
and indirect expenses                               1.52%          1.53%             N/A            N/A          N/A        N/A
----------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                            25%            30%             46%             1%           33%       14%
</TABLE>



1. For the two months ended August 31, 1996. The Fund changed its fiscal year
end from June 30 to August 31.

2. Assumes a $1,000 hypothetical initial investment on the business day before
the first day of the fiscal period (or inception of offering), with all
dividends and distributions reinvested in additional shares on the reinvestment
date, and redemption at the net asset value calculated on the last business day
of the fiscal period. Sales charges are not reflected in the total returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for period of less than one full year.

4. Expense ratios reflect the effect of expenses paid indirectly by the Fund.

5. The lesser of purchases or sales of portfolio securities for a period,
divided by the monthly average of the market value of portfolio securities
owned during the period. Securities with a maturity or expiration date at the
time of acquisition of one year or less are excluded from the calculation.
Purchases and sales of investment securities (excluding short-term securities)
for the period ended August 31, 1999 were $48,357,555 and $35,079,315,
respectively.

See accompanying Notes to Financial Statements.

             22  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>
NOTES TO FINANCIAL STATEMENTS

===============================================================================
1. SIGNIFICANT ACCOUNTING POLICIES

Oppenheimer Main Street California Municipal Fund (the Fund) is a separate
series of Oppenheimer Main Street Funds, Inc., an open-end management
investment company registered under the Investment Company Act of 1940, as
amended. The Fund's investment objective is to seek as high a level of current
income exempt from federal and California personal income taxes as is available
from investing in municipal securities while attempting to preserve capital.
The Fund's investment advisor is OppenheimerFunds, Inc. (the Manager). The Fund
offers Class A and Class B shares. Class A shares are sold with a front-end
sales charge on investments up to $1 million. Class B shares may be subject to
a contingent deferred sales charge (CDSC). All classes of shares have identical
rights to earnings, assets and voting privileges, except that each class has
its own expenses directly attributable to that class and exclusive voting
rights with respect to matters affecting that class. Classes A and B have
separate distribution and/or service plans. Class B shares will automatically
convert to Class A shares six years after the date of purchase. The following
is a summary of significant accounting policies consistently followed by the
Fund.

-------------------------------------------------------------------------------
SECURITIES VALUATION. Portfolio securities are valued at the close of the New
York Stock Exchange on each trading day. Listed and unlisted securities for
which such information is regularly reported are valued at the last sale price
of the day or, in the absence of sales, at values based on the closing bid or
the last sale price on the prior trading day. Long-term and short-term
"non-money market" debt securities are valued by a portfolio pricing service
approved by the Board of Directors. Such securities which cannot be valued by
an approved portfolio pricing service are valued using dealer-supplied
valuations provided the Manager is satisfied that the firm rendering the quotes
is reliable and that the quotes reflect current market value, or are valued
under consistently applied procedures established by the Board of Directors to
determine fair value in good faith. Short-term "money market type" debt
securities having a remaining maturity of 60 days or less are valued at cost
(or last determined market value) adjusted for amortization to maturity of any
premium or discount. Options are valued based upon the last sale price on the
principal exchange on which the option is traded or, in the absence of any
transactions that day, the value is based upon the last sale price on the prior
trading date if it is within the spread between the closing bid and asked
prices. If the last sale price is outside the spread, the closing bid is used.


             23  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

<PAGE>
Notes to Financial Statements continued

===============================================================================
1. SIGNIFICANT ACCOUNTING POLICIES Continued

ALLOCATION OF INCOME, EXPENSES, GAINS AND LOSSES. Income, expenses (other than
those attributable to a specific class), gains and losses are allocated daily
to each class of shares based upon the relative proportion of net assets
represented by such class. Operating expenses directly attributable to a
specific class are charged against the operations of that class.

-------------------------------------------------------------------------------
FEDERAL TAXES. The Fund intends to continue to comply with provisions of the
Internal Revenue Code applicable to regulated investment companies and to
distribute all of its taxable income, including any net realized gain on
investments not offset by loss carryovers, to shareholders. Therefore, no
federal income or excise tax provision is required.

-------------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to
shareholders, which are determined in accordance with income tax regulations,
are recorded on the ex-dividend date.

-------------------------------------------------------------------------------
CLASSIFICATION OF DISTRIBUTIONS TO SHAREHOLDERS. Net investment income (loss)
and net realized gain (loss) may differ for financial statement and tax
purposes. The character of distributions made during the year from net
investment income or net realized gains may differ from its ultimate
characterization for federal income tax purposes. Also, due to timing of
dividend distributions, the fiscal year in which amounts are distributed may
differ from the fiscal year in which the income or realized gain was recorded
by the Fund.

-------------------------------------------------------------------------------
EXPENSE OFFSET ARRANGEMENTS. Expenses paid indirectly represent a reduction of
custodian fees for earnings on cash balances maintained by the Fund.

-------------------------------------------------------------------------------
OTHER. Investment transactions are accounted for as of trade date. Original
issue discount is accreted and premium is amortized in accordance with federal
income tax requirements. For municipal bonds acquired after April 30, 1993, on
disposition or maturity, taxable ordinary income is recognized to the extent of
the lesser of gain or market discount that would have accrued over the holding
period. Realized gains and losses on investments and unrealized appreciation
and depreciation are determined on an identified cost basis, which is the same
basis used for federal income tax purposes.

      There are certain risks arising from geographic concentration in any
state. Certain revenue- or tax-related events in a state may impair the ability
of certain issuers of municipal securities to pay principal and interest on
their obligations.

      The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of income and expenses during the reporting
period. Actual results could differ from those estimates.



             24  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND

<PAGE>

===============================================================================
2. CAPITAL STOCK

The Fund has authorized 16,250,000 shares of $.01 par value capital stock of
each class. Transactions in shares of capital stock were as follows:

<TABLE>
<CAPTION>
                           YEAR ENDED AUGUST 31, 1999      YEAR ENDED AUGUST 31, 1998
                           SHARES              AMOUNT      SHARES              AMOUNT
--------------------------------------------------------------------------------------
<S>                         <C>         <C>                <C>          <C>
CLASS A
Sold                         1,681,985   $ 21,674,388       2,165,645    $ 27,847,918
Dividends and/or
distributions reinvested       281,702      3,627,456         290,138       3,721,102
Redeemed                    (1,423,149)   (18,282,543)     (1,141,736)    (14,681,043)
                            ----------------------------------------------------------

Net increase                   540,538   $  7,019,301       1,314,047    $ 16,887,977
                            ==========================================================
--------------------------------------------------------------------------------------
CLASS B
Sold                           964,557   $ 12,473,622         931,591    $ 11,964,499
Dividends and/or
distributions reinvested        59,086        758,691          44,882         575,114
Redeemed                      (367,694)    (4,716,392)       (138,617)     (1,782,428)
                            ----------------------------------------------------------
Net increase                   655,949   $  8,515,921         837,856    $ 10,757,185
                            ==========================================================
</TABLE>

===============================================================================
3. UNREALIZED GAINS AND LOSSES ON SECURITIES

As of August 31, 1999, net unrealized depreciation on securities of $870,180
was composed of gross appreciation of $3,223,012, and gross depreciation of
$4,093,192.

===============================================================================
4. MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES

MANAGEMENT FEES. Management fees paid to the Manager were in accordance with
the investment advisory agreement with the Fund which provides for a fee of
0.55% of average annual net assets if the Fund's net assets are $100 million or
more (it is reduced if assets are less). The Manager has voluntarily undertaken
to limit its fees to 0.40% of average annual net assets if the Fund's assets
are $100 million or more. The Manager can terminate that waiver at any time.
The Fund's management fee for the year ended August 31, 1999 was 0.40% of
average annual net assets for each class of shares, after giving affect to the
waiver.

-------------------------------------------------------------------------------
TRANSFER AGENT FEES. OppenheimerFunds Services (OFS), a division of the
Manager, is the transfer and shareholder servicing agent for the Fund and for
other Oppenheimer funds. OFS's total costs of providing such services are
allocated ratably to these funds.

-------------------------------------------------------------------------------
DISTRIBUTION AND SERVICE PLAN FEES. Under its General Distributor's Agreement
with the Manager, the Distributor acts as the Fund's principal underwriter in
the continuous public offering of the different classes of shares of the Fund.


             25  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
NOTES TO FINANCIAL STATEMENTS Continued

===============================================================================
4. MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES  CONTINUED

The compensation paid to (or retained by) the Distributor from the sale of
shares or on the redemption of shares is shown in the table below for the
period indicated.

<TABLE>
<CAPTION>
                                     AGGREGATE            CLASS A       COMMISSIONS       COMMISSIONS
                                     FRONT-END          FRONT-END        ON CLASS A        ON CLASS B
                                 SALES CHARGES      SALES CHARGES            SHARES            SHARES
                                    ON CLASS A        RETAINED BY       ADVANCED BY       ADVANCED BY
YEAR ENDED                              SHARES        DISTRIBUTOR    DISTRIBUTOR(1)    DISTRIBUTOR(1)
-------------------------------------------------------------------------------------------------------
<S>                                  <C>                <C>             <C>                 <C>
August 31, 1999                       $370,004            $65,422           $27,796          $426,112
</TABLE>

1. The Distributor advances commission payments to dealers for certain sales of
Class A shares and for sales of Class B shares from its own resources at the
time of sale.

<TABLE>
<CAPTION>
                                                          CLASS A                             CLASS B
                                              CONTINGENT DEFERRED                 CONTINGENT DEFERRED
                                                    SALES CHARGES                       SALES CHARGES
YEAR ENDED                                RETAINED BY DISTRIBUTOR             RETAINED BY DISTRIBUTOR
-------------------------------------------------------------------------------------------------------
<S>                                                      <C>                                <C>
August 31, 1999                                            $4,038                             $95,508
</TABLE>


      The Fund has adopted a Distribution and Service Plan for Class B shares
under Rule 12b-1 of the Investment Company Act. Under those plans the Fund pays
the Distributor for all or a portion of its costs incurred in connection with
the distribution and/or servicing of the shares of the particular class.

-------------------------------------------------------------------------------
CLASS B DISTRIBUTION AND SERVICE PLAN FEES. Under each plan, service fees and
distribution fees are computed on the average of the net asset value of shares
in the respective class, determined as of the close of each regular business
day during the period. The Class B plan allows the Distributor to be reimbursed
for its services and costs in distributing Class B and servicing accounts.

      The Distributor retains the asset-based sales charge on Class B shares.
The asset-based sales charges on Class B shares allow investors to buy shares
without a front-end sales charge while allowing the Distributor to compensate
dealers that sell those shares.

      The Distributor's actual expenses in selling Class B shares may be more
than the payments it receives from the contingent deferred sales charges
collected on redeemed shares and from the Fund under the plan. If the Class B
plan is terminated by the Fund, the Board of Directors may allow the Fund to
continue payments of the asset-based sales charge to the Distributor for
distributing shares before the plan was terminated. The plan allows for the
carry-forward of distribution expenses, to be recovered from asset-based sales
charges in subsequent fiscal periods.

Distribution fees paid to the Distributor for the year ended August 31, 1999
were as follows:

<TABLE>
<CAPTION>
                                                                      DISTRIBUTOR'S     DISTRIBUTOR'S
                                                                          AGGREGATE      UNREIMBURSED
                                                                       UNREIMBURSED     EXPENSES AS %
                                TOTAL PAYMENTS    AMOUNT RETAINED          EXPENSES     OF NET ASSETS
                                    UNDER PLAN     BY DISTRIBUTOR        UNDER PLAN          OF CLASS
------------------------------------------------------------------------------------------------------
<S>                                  <C>                <C>              <C>                   <C>
Class B Plan                          $280,483           $238,366        $1,067,326             3.59%
</TABLE>


             26  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>

===============================================================================
5. FUTURES CONTRACTS

The Fund may buy and sell futures contracts in order to gain exposure to or to
seek to protect against changes in interest rates. The Fund may also buy or
write put or call options on these futures contracts.

      The Fund generally sells futures contracts to hedge against increases in
interest rates and the resulting negative effect on the value of fixed rate
portfolio securities. The Fund may also purchase futures contracts to gain
exposure to changes in interest rates as it may be more efficient or cost
effective than actually buying fixed income securities.

      Upon entering into a futures contract, the Fund is required to deposit
either cash or securities (initial margin) in an amount equal to a certain
percentage of the contract value. Subsequent payments (variation margin) are
made or received by the Fund each day. The variation margin payments are equal
to the daily changes in the contract value and are recorded as unrealized gains
and losses. The Fund may recognize a realized gain or loss when the contract is
closed or expires.

      Securities held in collateralized accounts to cover initial margin
requirements on open futures contracts are noted in the Statement of
Investments. The Statement of Assets and Liabilities reflects a receivable
and/or payable for the daily mark to market for variation margin.

      Risks of entering into futures contracts (and related options) include
the possibility that there may be an illiquid market and that a change in the
value of the contract or option may not correlate with changes in the value of
the underlying securities.

As of August 31, 1999, the Fund had outstanding futures contracts as follows:

<TABLE>
<CAPTION>
                                                     NUMBER OF        VALUATION AS OF        UNREALIZED
CONTRACT DESCRIPTION            EXPIRATION DATE      CONTRACTS        AUGUST 31, 1999       APPRECIATION
-----------------------------------------------------------------------------------------------------------
CONTRACTS TO SELL
-----------------
<S>                                   <C>                  <C>             <C>                  <C>
U.S. Treasury Bonds                     9/21/99             40             $4,573,750            $73,750
</TABLE>


===============================================================================
6. BANK BORROWINGS

The Fund may borrow from a bank for temporary or emergency purposes including,
without limitation, funding of shareholder redemptions provided asset coverage
for borrowings exceeds 300%. The Fund has entered into an agreement which
enables it to participate with other Oppenheimer funds in an unsecured line of
credit with a bank, which permits borrowings up to $400 million, collectively.
Interest is charged to each fund, based on its borrowings, at a rate equal to
the Federal Funds Rate plus 0.35%. Borrowings are payable 30 days after such
loan is executed. The Fund also pays a commitment fee equal to its pro rata
share of the average unutilized amount of the credit facility at a rate of
0.0575% per annum.

      The Fund had no borrowings outstanding during the year ended August 31,
1999.


             27  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
INDEPENDENT AUDITORS' REPORT

===============================================================================
TO THE BOARD OF DIRECTORS AND SHAREHOLDERS OF
OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND:

We have audited the accompanying statement of assets and liabilities, including
the statement of investments, of Oppenheimer Main Street California Municipal
Fund as of August 31, 1999, the related statement of operations for the year
then ended, the statements of changes in net assets for the years ended August
31, 1999 and 1998 and the financial highlights for the period July 1, 1994, to
August 31, 1999. These financial statements and financial highlights are the
responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

      We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999, by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

        In our opinion, such financial statements and financial highlights
present fairly, in all material respects, the financial position of Oppenheimer
Main Street California Municipal Fund as of August 31, 1999, the results of its
operations, the changes in its net assets, and the financial highlights for the
respective stated periods, in conformity with generally accepted accounting
principles.




DELOITTE & TOUCHE LLP

Denver, Colorado
September 22, 1999


             28  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>
FEDERAL INCOME TAX INFORMATION Unaudited

===============================================================================
In early 2000 shareholders will receive information regarding all dividends and
distributions paid to them by the Fund during calendar year 1999. Regulations
of the U.S. Treasury Department require the Fund to report this information to
the Internal Revenue Service.

      None of the dividends paid by the Fund during the year ended August 31,
1999 are eligible for the corporate dividend-received deduction. The dividends
were derived from interest on municipal bonds and are not subject to federal
income taxes. To the extent a shareholder is subject to any state or local tax
laws, some or all of the dividends may be taxable.

      The foregoing information is presented to assist shareholders in
reporting distributions received from the Fund to the Internal Revenue Service.
Because of the complexity of the federal regulations which may affect your
individual tax return and the many variations in state and local tax
regulations, we recommend that you consult your tax advisor for specific
guidance.


             29  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND
<PAGE>


OPPENHEIMER MAIN STREET(R) CALIFORNIA MUNICIPAL FUND

A Series of Oppenheimer Main Street Funds, Inc.
<TABLE>
==============================================================================================
<S>                             <C>
OFFICERS AND DIRECTORS          James C. Swain, Director and Chairman of the Board
                                Bridget A. Macaskill, Director and President
                                Robert G. Avis, Director
                                William A. Baker, Director
                                George C. Bowen, Director
                                Jon S. Fossel, Director
                                Sam Freedman, Director
                                Raymond J. Kalinowski, Director
                                C. Howard Kast, Director
                                Robert M. Kirchner, Director
                                Ned M. Steel, Director
                                Caryn Halbrecht, Vice President
                                Andrew J. Donohue, Vice President and Secretary
                                Brian W. Wixted, Treasurer
                                Robert G. Zack, Assistant Secretary
                                Robert J. Bishop, Assistant Treasurer
                                Scott T. Farrar, Assistant Treasurer
==============================================================================================
INVESTMENT ADVISOR              OppenheimerFunds, Inc.

==============================================================================================
DISTRIBUTOR                     OppenheimerFunds Distributor, Inc.
==============================================================================================
TRANSFER AND SHAREHOLDER        OppenheimerFunds Services
SERVICING AGENT
==============================================================================================
CUSTODIAN OF                    The Bank of New York
PORTFOLIO SECURITIES
==============================================================================================
INDEPENDENT AUDITORS            Deloitte & Touche LLP
==============================================================================================
LEGAL COUNSEL                   Myer, Swanson, Adams & Wolf, P.C.

                                This is a copy of a report to shareholders of Oppenheimer
                                Main Street California Municipal Fund. This report must
                                be preceded or accompanied by a Prospectus of
                                Oppenheimer Main Street California Municipal Fund. For
                                material information concerning the Funds, see the
                                Prospectus.

                                SHARES OF OPPENHEIMER FUNDS ARE NOT DEPOSITS OR
                                OBLIGATIONS OF ANY BANK, ARE NOT GUARANTEED BY ANY
                                BANK, ARE NOT INSURED BY THE FDIC OR ANY OTHER AGENCY,
                                AND INVOLVE INVESTMENT RISKS, INCLUDING THE POSSIBLE
                                LOSS OF THE PRINCIPAL AMOUNT INVESTED.

</TABLE>


             30  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>



OPPENHEIMERFUNDS FAMILY


<TABLE>
================================================================================================================
<S>                             <C>                                     <C>
GLOBAL EQUITY

                                 Developing Markets Fund                 Global Fund
                                 International Small Company Fund        Quest Global Value Fund
                                 Europe Fund                             Global Growth & Income Fund
                                 International Growth Fund

================================================================================================================
EQUITY

                                 Stock                                   Stock & Bond
                                 Enterprise Fund(1)                      Main Street(R) Growth & Income Fund
                                 Discovery Fund                          Quest Opportunity Value Fund
                                 Main Street(R) Small Cap Fund           Total Return Fund
                                 Quest Small Cap Value Fund              Quest Balanced Value Fund
                                 MidCap Fund                             Capital Income Fund(2)
                                 Capital Appreciation Fund               Multiple Strategies Fund
                                 Growth Fund                             Disciplined Allocation Fund
                                 Disciplined Value Fund                  Convertible Securities Fund
                                 Quest Value Fund
                                                                         Specialty
                                                                         Real Asset Fund
                                                                         Gold & Special Minerals Fund

================================================================================================================
FIXED INCOME

                                 Taxable                                 Municipal
                                 International Bond Fund                 California Municipal Fund(3)
                                 World Bond Fund                         Florida Municipal Fund(3)
                                 High Yield Fund                         New Jersey Municipal Fund(3)
                                 Champion Income Fund                    New York Municipal Fund(3)
                                 Strategic Income Fund                   Pennsylvania Municipal Fund(3)
                                 Bond Fund                               Municipal Bond Fund
                                 U.S. Government Trust                   Insured Municipal Fund
                                 Limited-Term Government Fund            Intermediate Municipal Fund

                                                                         Rochester Division
                                                                         Rochester Fund Municipals
                                                                         Limited Term New York Municipal Fund

================================================================================================================
MONEY MARKET(4)

                                 Money Market Fund                       Cash Reserves
</TABLE>


1. Effective July 1, 1999, this fund is closed to new investors. See prospectus
for details.

2. On 4/1/99, the Fund's name was changed from "Oppenheimer Equity Income
Fund."

3. Available to investors only in certain states.

4. An investment in money market funds is neither insured nor guaranteed by the
Federal Deposit Insurance Corporation or any other government agency. Although
these funds may seek to preserve the value of your investment at $1.00 per
share, it is possible to lose money by investing in these funds. Oppenheimer
funds are distributed by OppenheimerFunds Distributor, Inc., Two World Trade
Center, New York, NY 10048-0203.

(C) Copyright 1999 OppenheimerFunds, Inc. All rights reserved.



             31  OPPENHEIMER MAIN STREET CALIFORNIA MUNICIPAL FUND


<PAGE>


INFORMATION AND SERVICES

As an Oppenheimer fund shareholder, you can benefit from special services
designed to make investing simple. Whether it's automatic investment plans,
timely market updates, or immediate account access, you can count on us
whenever you need assistance. So call us today, or visit our website--we're
here to help.

-------------------------------------------------------------------------
Internet
24-hr access to account information and transactions
www.oppenheimerfunds.com
-------------------------------------------------------------------------
General Information
Mon-Fri 8:30am-9pm ET, Sat 10am-4pm ET
1.800.525.7048
-------------------------------------------------------------------------
Telephone Transactions
Mon-Fri 8:30am-9pm ET, Sat 10am-4pm ET
1.800.852.8457
-------------------------------------------------------------------------
PhoneLink
24-hr automated information and automated transactions
1.800.533.3310
-------------------------------------------------------------------------
Telecommunications Device for  the Deaf (TDD)
Mon-Fri 8:30am-7pm ET
1.800.843.4461
-------------------------------------------------------------------------
OppenheimerFunds Information Hotline
24 hours a day, timely and insightful messages on the
economy and issues that may affect your investments
1.800.835.3104
-------------------------------------------------------------------------
Transfer and Shareholder Servicing Agent
OppenheimerFunds Services
P.O. Box 5270, Denver, CO 80217-5270
-------------------------------------------------------------------------

                                                    [OPPENHEIMERFUNDS LOGO]
RA0725.001.0899  October 29, 1999                     Distributor, Inc.



<PAGE>





                      SEMIANNUAL REPORT JANUARY 31, 2000

                                 OPPENHEIMER

                          CALIFORNIA MUNICIPAL FUND
                                   [PHOTO]

                           [OPPENHEIMERFUNDS LOGO]
                           THE RIGHT WAY TO INVEST








<PAGE>




CONTENTS

 1  President's Letter

 3  An Interview
    with Your Fund's Manager

 8  Financial
    Statements

29  Officers and Trustees

REPORT HIGHLIGHTS
--------------------------------------------------------------------------------
RISING  INTEREST RATES HURT THE  PERFORMANCE OF MUNICIPAL  BONDS  throughout the
reporting period.

AS OF JANUARY 31, 2000,  LONG-TERM  CALIFORNIA MUNICIPAL BONDS PROVIDED OVER 90%
OF THE YIELD AVAILABLE FROM COMPARABLE U.S.  TREASURIES--making  them attractive
values on an after-tax basis.

CUMULATIVE TOTAL RETURNS

For the 6-Month Period
Ended 1/31/00*

CLASS A

Without     With
Sales Chg.  Sales Chg.
----------------------
-6.07%      -10.54%

CLASS B

Without     With
Sales Chg.  Sales Chg.
----------------------
-6.34%      -10.91%

CLASS C

Without     With
Sales Chg.  Sales Chg.
----------------------
-6.35%      -7.26%


NOT FDIC INSURED.
NO BANK GUARANTEE.
MAY LOSE VALUE.

*  See page 7 for further details.






<PAGE>



PRESIDENT'S LETTER

[PHOTO]
BRIDGET A. MACASKILL
President
Oppenheimer
California
Municipal Fund


DEAR SHAREHOLDER,
--------------------------------------------------------------------------------
Whenever a new year begins--let alone a new decade or century--it makes sense to
pause a moment to assess where we've been and where we're going.

      In  retrospect,  U.S.  stocks and bonds in 1999 were subject to sudden and
substantial swings in investor sentiment because of economic  uncertainty.  When
the year began,  investors were concerned that growth in the United States might
slow in response to economic  weakness  overseas.  At mid-year,  investors  were
concerned that the economy was too strong,  potentially rekindling  inflationary
pressures.  Yet, by year end, it became clearer that while the U.S. economy grew
robustly in 1999, inflation remained at low levels.  Indeed,  investors appeared
more comfortable  with the economy after the Federal Reserve Board  demonstrated
its  inflation-fighting  resolve by raising  interest  rates three times between
June and November.

      As is normal in a rising-interest-rate  environment, bond prices generally
declined in 1999, led lower by U.S.  Treasury bonds. In the stock market,  while
most major indices advanced,  strong performance was mostly limited to a handful
of large-capitalization  growth companies,  principally in the technology arena.
Smaller and value-oriented stocks provided particularly  lackluster returns, and
overall, foreign stocks outperformed U.S. stocks in 1999.

      Looking   forward,   we   expect   the  U.S.   economy   to  remain  on  a
moderate-growth,  low-inflation  course.  As recent revisions of 1999's economic
statistics  demonstrated,  the economy has defied many  analysts'  forecasts  by
growing  at a strong  rate,  which  should  be  positive  for the  bond  market.
Similarly,  positive  economic forces could help the stock market's  performance
broaden to include value-oriented and smaller stocks.

      We see particularly compelling opportunities outside of the U.S. market.
Manyforeign stocks also ended 1999 more attractively valued than large-cap U.S.
stocks, and economic trends in overseas markets could lead to higher stock
prices. In Europe, corporate restructuring has just begun, giving

                    1 Oppenheimer California Municipal Fund



<PAGE>



PRESIDENT'S LETTER



companies   there  the  same  potential  for   cost-cutting   and   productivity
improvements  that  U.S.  companies  enjoyed  10 years  ago.  In Japan and Asia,
economic  recovery  is expected to gain  strength,  which could allow  stocks to
rally from relatively low levels.

      Another  1999 trend that  should  remain in force in 2000 is the growth of
businesses  related to the Internet.  The rise of  e-Commerce  has been good for
consumers and the economy because of greater price competition, which has helped
keep inflation under control. The Internet has also been good for investors,  as
even  companies  with no earnings  have seen their stock prices  soar.  Clearly,
while the Internet is here to stay,  not all "dot-com"  companies  will survive,
and many of these high-flying Internet stocks will eventually--and  perhaps very
suddenly--return  to more  reasonable  levels.  The  long-term  winners are most
likely to be  companies  that  support the  Internet's  growth  with  content or
infrastructure.

      What  else is in store  for  investors  in  2000?  While we do not have an
infallible  crystal ball, we believe that in almost any investment  environment,
consistent  success stems from an  unwavering  focus on  fundamental  investment
principles such as maintaining a long-term perspective, using diversification to
manage risks and availing  oneself of the services of a knowledgeable  financial
advisor.  Indeed,  these principles serve as the foundation for every investment
we offer,  helping to make  OppenheimerFunds The Right Way to Invest in 2000 and
beyond.

Sincerely,

/s/ Bridget A. Macaskill
February 22, 2000

These general market views represent opinions of OppenheimerFunds,  Inc. and are
not intended to predict or depict  performance of any particular fund.  Specific
discussion, as it applies to your Fund, is contained in the pages that follow.

                    2 Oppenheimer California Municipal Fund



<PAGE>






[PHOTO]
PORTFOLIO MANAGEMENT
TEAM (L TO R)
Christian Smith (Portfolio Manager)
Robert Patterson

AN INTERVIEW WITH YOUR FUND'S MANAGER
--------------------------------------------------------------------------------
Q. HOW DID THE FUND PERFORM DURING THE SIX-MONTH PERIOD THAT ENDED JANUARY 31,
2000?

A. It has been a difficult period for the municipal securities market, including
Oppenheimer  California Municipal Fund. The rising interest rate environment,  a
sharp  decline  in the demand  for  municipal  bonds and a lack of supply of new
issues were some of the challenges the Fund encountered.

WHAT STEPS ARE YOU TAKING TO HELP IMPROVE THE FUND'S PERFORMANCE?

In  November  1999,  we began to  restructure  the Fund  under the  guidance  of
Christian Smith, a money management  professional  with over 10 years experience
in the municipal market.  This change should help us gain a fresh perspective on
the  California  municipal  market,  and  proactively  access the  opportunities
available for the Fund.

HOW DID THE ROBUST U.S. ECONOMY AFFECT THE OVERALL MUNICIPAL MARKET?

Ongoing economic  strength led to higher interest rates,  which, in turn, led to
lower bond prices. With bonds becoming less attractive to investors, many turned
to the stock market for better returns.

      The lengthy  economic  expansion has also resulted in a decrease in supply
of municipal bonds. First,  government  surpluses on the federal and state level
resulted in less need to issue debt to finance new projects. Second, the rise in
interest  rates caused a natural  decline in the  refinancing  of existing debt.
When  interest  rates  are  on  the  upswing,  there  is  little  reason  for an
organization  to  retire  existing,  lower  yielding  debt,  and  introduce  new
securities with higher yields.  Often times in the financial markets, a decrease
in supply of a particular security leads to higher prices.  However, the decline
in the demand for municipals more than offset the falling supply.

                    3 Oppenheimer California Municipal Fund



<PAGE>





"Our focus has been to lower the portfolio's sensitivity to changes in interest
rates."

AN INTERVIEW WITH YOUR FUND'S MANAGER
--------------------------------------------------------------------------------

HOW WAS THE FUND MANAGED GIVEN THIS DIFFICULT ENVIRONMENT?

Our focus has been to lower the portfolio's  sensitivity to interest rates.  For
example, we have been working to reduce the Fund's duration versus its benchmark
by focusing on shorter-term securities. When it appears that interest rates have
peaked,  we may look to extend the Fund's  duration to take  advantage of rising
bond prices.

COULD YOU DESCRIBE SOME OF YOUR INVESTMENT  STRATEGIES  THAT HELPED  PERFORMANCE
DURING THE REPORTING PERIOD?

We enhanced  returns  through select  investments in non-rated  California  real
estate  securities.  These bonds are typically issued by smaller  organizations,
and  are  used  to  help  finance  the  infrastructure  needed  in  new  housing
developments.  As non-rated securities,  they generally offer attractive yields.
Once the  developments  are occupied by tax-paying  families and  organizations,
this revenue aids the financial  stability of the issuer, and the securities may
then become rated--sometimes leading to capital appreciation for the Fund.

      In addition, we benefited from our investment in a non-profit organization
that helps train handicapped individuals to join the mainstream workforce.  This
organization has been in existence for over 30 years, it has a strong management
team in  place,  and is  widely  known by  companies  that are  looking  for its
services.

                    4 Oppenheimer California Municipal Fund



<PAGE>



AVERAGE ANNUAL
TOTAL RETURNS

For the Periods Ended 12/31/99(1)

Class A
1-Year   5-Year 10-Year
--------------------------
-10.98%  5.34%  5.56%

Class B         Since
1-Year   5-Year Inception
--------------------------
-11.78%  5.26%  3.70%

Class C         Since
1-Year   5-Year Inception
--------------------------
-8.14%   N/A    3.07%


STANDARDIZED YIELD(2)
For the 30-days Ended 1/31/00
---------------------------------
Class A         5.18%
---------------------------------
Class B         4.67
---------------------------------
Class C         4.68


HOW DID CALIFORNIA MUNICIPAL BONDS PERFORM COMPARED TO U.S. TREASURIES?

As interest rates rose, both types of securities  performed poorly.  However, in
recent  months   municipals   outperformed   U.S.   Treasuries  with  comparable
maturities,  due to municipal's  attractive  after-tax values. As of January 31,
2000,  yields  available from  California  municipal  bonds were over 90% of the
yields available from comparable  taxable government bonds. When considering the
tax-advantaged  yields  provided  by  California  municipals,  these  securities
present better values compared to Treasuries.

WHAT IS YOUR OUTLOOK FOR THE ECONOMY OVER THE NEXT FEW MONTHS?

As we see it, the Federal  Reserve  will remain  diligent in its attempt to slow
the pace of economic growth to help ward off an increase in inflation.  As such,
we expect  interest rates to continue  rising into the summer.  However,  as the
year  progresses,  we anticipate  seeing  growth rates fall, as rising  interest
rates should lead to a decline in consumer  spending,  and less  dramatic  stock
market gains. Ideally, this would result in interest rates moving downward.


1. See page 7 for further details.

2.  Standardized  yield is based on net investment  income for the 30-day period
ended  January 31, 2000.  Falling share prices will tend to  artificially  raise
yields.

                    5 Oppenheimer California Municipal Fund



<PAGE>





CREDIT ALLOCATION(3)
[PIE CHART]


AAA             45.9%
AA               8.9
A                9.5
BBB             23.5
BB              11.4
B                0.8



In the  meantime,  we will  continue  to actively  monitor  the  markets--making
careful adjustments to the Fund's portfolio as is necessary.  Diligently working
to enhance returns while being mindful of risk--just two reasons why Oppenheimer
California Municipal Fund is an important part of The Right Way to Invest.




TOP FIVE INDUSTRIES (Percentage of invested assets)(4)
--------------------------------------------------------

  Special Assessment                                28.7%
--------------------------------------------------------
  Municipal Leases                                  11.2
--------------------------------------------------------
  Single Family Housing                             10.7
--------------------------------------------------------
  Highways                                           9.3
--------------------------------------------------------
  Electric Utilities                                 8.2
--------------------------------------------------------



3.  Portfolio  data are as of January 31, 2000,  are subject to change,  and are
dollar-weighted based on total market value of investments.  The Fund may invest
up to 25% of its assets in below-investment-grade securities which carry greater
risk  of  default.  Average  credit  quality  and  ratings  allocations  include
securities rated by national ratings organizations as well as unrated securities
(currently  19.6% of total  investments)  which  have  ratings  assigned  by the
Manager in categories equivalent to those of ratings organizations.

4. Industry weightings are as of January 31, 2000, and are subject to change.

                    6 Oppenheimer California Municipal Fund



<PAGE>






NOTES

IN REVIEWING  PERFORMANCE AND RANKINGS,  PLEASE  REMEMBER THAT PAST  PERFORMANCE
DOES NOT GUARANTEE FUTURE RESULTS.  INVESTMENT  RETURN AND PRINCIPAL VALUE OF AN
INVESTMENT  IN THE  FUND  WILL  FLUCTUATE  SO THAT AN  INVESTOR'S  SHARES,  WHEN
REDEEMED,  MAY BE  WORTH  MORE  OR LESS  THAN  THE  ORIGINAL  COST.  THE  FUND'S
PERFORMANCE MAY FROM TIME TO TIME BE SUBJECT TO SUBSTANTIAL  SHORT-TERM CHANGES,
PARTICULARLY  DURING PERIODS OF MARKET OR INTEREST RATE VOLATILITY.  FOR UPDATES
ON THE FUND'S  PERFORMANCE,  PLEASE CONTACT YOUR FINANCIAL  ADVISOR,  CALL US AT
1.800.525.7048 OR VISIT OUR WEBSITE, WWW.OPPENHEIMERFUNDS.COM.

Total returns include  changes in share price and  reinvestment of dividends and
capital gains distributions in a hypothetical investment for the periods shown.
Cumulative total returns are not annualized.

CLASS A shares were first publicly  offered on 11/3/88.  Class A returns include
the current maximum initial sales charge of 4.75%.

CLASS B shares  of the Fund were  first  publicly  offered  on  5/3/93.  Class B
returns include the applicable  contingent  deferred sales charge of 5% (1-year)
and 1%  (5-year).  Because  Class B shares  convert  to Class A shares 72 months
after purchase,  the "life-of-class" return for Class B uses Class A performance
for the period after  conversion.  Class B shares are subject to an annual 0.75%
asset-based sales charge.

CLASS C shares of the Fund were  first  publicly  offered  on  11/1/95.  Class C
returns  include  the  contingent  deferred  sales  charge of 1% for the  1-year
period. Class C shares are subject to an annual 0.75% asset-based sales charge.

An  explanation  of the  different  performance  calculations  is in the  Fund's
prospectus.

                    7 Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>





STATEMENT OF INVESTMENTS  January 31, 2000 / Unaudited


                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------

 MUNICIPAL BONDS AND NOTES--98.3%
-----------------------------------------------------------------------------------------------------------------
 CALIFORNIA--93.8%
<S>                                                           <C>                 <C>                  <C>
 Alhambra, CA COP, Police Facilities Assessment
 District No. 91-1, AMBAC Insured, 6.75%, 9/1/23              Aaa/AAA/AAA         $5,000,000           $5,209,950
-----------------------------------------------------------------------------------------------------------------
 Anaheim, CA PFAU Lease RB, Public Improvements
 Project, Sub. Lien, Series C, FSA Insured, Zero
 Coupon, 5.27%, 9/1/20(1)                                     Aaa/AAA/AAA          6,630,000            1,847,582
-----------------------------------------------------------------------------------------------------------------
 Anaheim, CA PFAU TXAL RB, MBIA Insured,
 Inverse Floater, 8.97%, 12/28/18(2)                              Aaa/AAA          3,000,000            3,270,000
-----------------------------------------------------------------------------------------------------------------
 Berkeley, CA HF RRB, Alta Bates Medical Center,
 Prerefunded, Series A, 6.50%, 12/1/11                              A2/NR          4,270,000            4,493,449
-----------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, American
 Baptist Homes, Series A, 6.20%, 10/1/27                           NR/BBB          6,000,000            5,277,180
-----------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Episcopal
 Homes Foundation, 5.125%, 7/1/18                                   NR/A-          5,900,000            4,756,521
-----------------------------------------------------------------------------------------------------------------
 CA Assn. of Bay Area Governments FAU for
 Non-profit Corps. Refunding COP, Rhonda Haas
 Goldman Plaza, 5.125%, 5/15/23                                    NR/AA-          2,300,000            1,936,232
-----------------------------------------------------------------------------------------------------------------
 CA CDAU Lease RB, United Airlines, Series A,
 5.70%, 10/1/33                                                  Baa3/BB+          9,185,000            7,656,616
-----------------------------------------------------------------------------------------------------------------
 CA Community College FAU Lease RB,
 West Valley Mission Community College,
 MBIA Insured, 5.625%, 5/1/22                                     Aaa/AAA          1,085,000            1,028,265
-----------------------------------------------------------------------------------------------------------------
 CA Educational FA RRB, Los Angeles College
 Chiropractic, 5.60%, 11/1/17                                     Baa2/NR          1,000,000              882,050
-----------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency Toll Road RB,
 Sr. Lien, Prerefunded, Series A, 6.50%, 1/1/32             Baa3/BBB-/BBB          4,600,000            5,042,658
-----------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency Toll Road
 RRB, Zero Coupon, 5.98%, 1/15/21(1)                        Baa3/BBB-/BBB          7,500,000            1,879,200
-----------------------------------------------------------------------------------------------------------------
 CA Foothill/Eastern Corridor Agency Toll Road
 RRB, Zero Coupon, 6%, 1/15/22(1)                           Baa3/BBB-/BBB          7,500,000            1,751,625
-----------------------------------------------------------------------------------------------------------------
 CA HFA Home Mtg. RB, Series C, 6.75%, 2/1/25                     Aa2/AA-             80,000               80,000
-----------------------------------------------------------------------------------------------------------------
 CA HFA RB, Series A, 7.35%, 8/1/11                               Aa2/AA-             75,000               77,206
-----------------------------------------------------------------------------------------------------------------
 CA HFA RB, Series C, 7.60%, 8/1/30                               Aa2/AA-            540,000              543,521
-----------------------------------------------------------------------------------------------------------------
 CA HFA RB, Series C, 7.60%, 8/1/30                               Aa2/AA-            220,000              220,000
-----------------------------------------------------------------------------------------------------------------
 CA HFA RB, Series E-1, 6.45%, 2/1/12                             Aa2/AA-            750,000              758,820
-----------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series 83, Inverse Floater,
 9.71%, 8/1/25(2)                                                  NR/AAA          3,245,000            3,292,637
-----------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series 83, Inverse Floater,
 9.77%, 8/1/25(2)                                                  NR/AAA            385,000              385,000
-----------------------------------------------------------------------------------------------------------------
 CA HFA SFM RB, Series C, 6.75%, 2/1/25                           Aa2/AA-          9,515,000            9,629,465

</TABLE>

                   8  OPPENHEIMER CALIFORNIA MUNICIPAL FUND



<PAGE>

<TABLE>
<CAPTION>






                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                 <C>                  <C>
 CALIFORNIA Continued
 CA HFFAU RB, Los Angeles Children's Hospital,
 Prerefunded, Series A, 7.125%, 6/1/21                             Aaa/NR         $1,000,000           $1,056,060
-----------------------------------------------------------------------------------------------------------------
 CA Infrastructure & ED Bank RB, American Center for
 Wine, Food & Arts, 5.75%, 12/1/24                                 NR/A/A          5,000,000            4,635,900
-----------------------------------------------------------------------------------------------------------------
 CA PCFAU SWD RRB, North Cnty. Recycling Center,
 Escrowed to Maturity, Series A, 6.75%, 7/1/11                     Aaa/NR            500,000              531,285
-----------------------------------------------------------------------------------------------------------------
 CA PWBL RB, State Prison Department of Corrections,
 Series E, FSA Insured, 5.50%, 6/1/15                         Aaa/AAA/AAA          3,000,000            2,964,600
-----------------------------------------------------------------------------------------------------------------
 CA PWBL RRB, Various University of CA Projects,
 Series A, 5.50%, 6/1/14                                        Aa3/A+/A+          1,500,000            1,499,145
-----------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, 7.25%, 11/1/29                                       NR/NR          5,000,000            4,843,650
-----------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, Childrens Hospital--Los Angeles,
 5.25%, 8/15/29                                                     A1/A+          5,000,000            4,146,900
-----------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, The Internext Group, 5.375%, 4/1/30                 NR/BBB          6,500,000            4,866,615
-----------------------------------------------------------------------------------------------------------------
 CA SCDAU COP, Winward Schools, 7.25%, 11/1/29                      NR/NR          1,500,000            1,483,530
-----------------------------------------------------------------------------------------------------------------
 CA SCDAU Revenue Refunding COP, Inverse Floater,
 6.915%, 11/1/15(2)                                                 A1/NR          6,600,000            6,014,250
-----------------------------------------------------------------------------------------------------------------
 Campbell, CA RA TXAL RB, Central Campbell
 Redevelopment Project, Series B, 6.60%, 10/1/32                Baa3/BBB-          1,255,000            1,204,662
-----------------------------------------------------------------------------------------------------------------
 Campbell, CA Refunding COP, Civic Center Project,
 Unrefunded Balance, 6.75%, 10/1/17                                 A2/NR          1,130,000            1,195,698
-----------------------------------------------------------------------------------------------------------------
 Capistrano, CA USD CFD SPTX Bonds, Ladera
 No. 98-2, 5.70%, 9/1/20                                            NR/NR          5,000,000            4,242,050
-----------------------------------------------------------------------------------------------------------------
 Capistrano, CA USD CFD SPTX Bonds, Prerefunded,
 No. 92-1, 7.10%, 9/1/21                                            NR/NR          3,250,000            3,686,637
-----------------------------------------------------------------------------------------------------------------
 Cerritos, CA PFAU RB, Los Coyotes Redevelopment
 Project, 6.50%, 11/1/23                                      Aaa/AAA/AAA          3,000,000            3,202,080
-----------------------------------------------------------------------------------------------------------------
 Chino Basin, CA Regional FAU RB, Inland Empire
 Utility Agency Sewer Project, MBIA Insured,
 5.75%, 11/1/19                                                   Aaa/AAA          1,000,000              978,540
-----------------------------------------------------------------------------------------------------------------
 Chino Basin, CA Regional FAU RB, Inland Empire
 Utility Agency Sewer Project, MBIA Insured,
 5.75%, 11/1/22                                                   Aaa/AAA            500,000              483,640
-----------------------------------------------------------------------------------------------------------------
 Clovis, CA USD CAP GOB, Series D, FGIC Insured,
 Zero Coupon, 5.60%, 8/1/10(1)                                    Aaa/AAA          2,000,000            1,143,600
-----------------------------------------------------------------------------------------------------------------
 Colton, CA PFAU TXAL RRB, Redevelopment
 Projects, Series B, 5.875%, 8/1/27                                 NR/NR          3,700,000            3,200,204
-----------------------------------------------------------------------------------------------------------------
 Commerce, CA Community Development
 Commission TXAL Refunding Bonds, Redevelopment
 Project No. 1, Sub. Lien, Series B, 5.75%, 8/1/10                  NR/NR            815,000              791,275
-----------------------------------------------------------------------------------------------------------------
 Commerce, CA Community Development
 Commission TXAL Refunding Bonds, Redevelopment
 Project No. 1, Sub. Lien, Series B, 6%, 8/1/21                     NR/NR          2,800,000            2,495,388
</TABLE>


                    9 OPPENHEIMER CALIFORNIA MUNICIPAL FUND





<PAGE>

<TABLE>
<CAPTION>




STATEMENT OF INVESTMENTS Unaudited/Continued



                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                              <C>              <C>                  <C>
 CALIFORNIA Continued
 Commerce, CA Joint Powers FAU Lease RB,
 Community Center, Series A, 6.25%, 10/1/22                       Baa2/NR         $1,410,000           $1,323,158
 ----------------------------------------------------------------------------------------------------------------
 Compton, CA Refunding COP, Civic Center &
 Capital Improvements, Series A, 5.50%, 9/1/15                     NR/BBB          3,000,000            2,640,390
-----------------------------------------------------------------------------------------------------------------
 Davis, CA Public Facilities FAU Local Agency RRB,
 Mace Ranch Area, Series A, 6.60%, 9/1/25                           NR/NR          5,000,000            4,830,450
-----------------------------------------------------------------------------------------------------------------
 Duarte, CA COP, City of Hope National Medical
 Center, 6.25%, 4/1/23                                           Baa1/AAA          4,500,000            4,797,495
-----------------------------------------------------------------------------------------------------------------
 East Palo Alto, CA RA TXAL RB, 6.625%, 10/1/29                     NR/NR          2,430,000            2,332,508
-----------------------------------------------------------------------------------------------------------------
 Escondido, CA Union High SDI CAP GOB, MBIA
 Insured, Zero Coupon, 6.20%, 11/1/18(1)                          Aaa/AAA          6,000,000            1,921,860
-----------------------------------------------------------------------------------------------------------------
 Escondido, CA Union High SDI CAP GOB, MBIA
 Insured, Zero Coupon, 6.20%, 11/1/19(1)                          Aaa/AAA          2,000,000              599,420
-----------------------------------------------------------------------------------------------------------------
 Folsom, CA SPTX Bonds, CFD No. 10, 6.875%, 9/1/19                  NR/NR          6,500,000            6,289,400
-----------------------------------------------------------------------------------------------------------------
 Huntington Park, CA PFAU Lease RRB, Wastewater
 System Project, Series A, 6.20%, 10/1/25                           NR/NR          3,000,000            2,749,680
-----------------------------------------------------------------------------------------------------------------
 Industry, CA Improvement Bond Act of 1915 SPAST
 GOB, Prerefunded, District No. 91-1, 7.65%, 9/2/21                 NR/NR          1,750,000            1,906,520
-----------------------------------------------------------------------------------------------------------------
 Laguna Salada, CA USD CAP GOB, Series B, FGIC
 Insured, Zero Coupon, 5.30%, 8/1/22(1)                       Aaa/AAA/AAA          3,035,000              744,364
-----------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA PFAU TXAL Bonds, Series A,
 5.50%, 9/1/30                                                     NR/BBB          5,000,000            4,077,550
-----------------------------------------------------------------------------------------------------------------
 Lake Elsinore, CA School FAU SPTX RRB,
 Horsethief Canyon, 5.625%, 9/1/16                                  NR/NR          4,760,000            4,072,656
-----------------------------------------------------------------------------------------------------------------
 Lincoln, CA Improvement Bond Act 1915
 PFAU RB, 6.20%, 9/2/25                                             NR/NR          4,000,000            3,632,160
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney Parking
 Project, Zero Coupon, 5.94%, 3/1/12(1)                       Aaa/AAA/AAA          1,100,000              557,447
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney Parking
 Project, Zero Coupon, 6.92%, 9/1/10(1)                        A3/BBB+/A-          5,960,000            3,222,632
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney Parking
 Project, Zero Coupon, 6.95%, 9/1/11(1)                        A3/BBB+/A-          2,900,000            1,461,368
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney Parking
 Project, Zero Coupon, 7.03%, 9/1/13(1)                        A3/BBB+/A-          4,500,000            1,962,135
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA CAP COP, Disney Parking
 Project, Zero Coupon, 6.13%, 9/1/14(1)                        A3/BBB+/A-          7,260,000            2,936,162
-----------------------------------------------------------------------------------------------------------------
 Los Angeles Cnty., CA Public Works FAU Lease RB,
 Multiple Capital Facilities Project V, Series A,
 AMBAC Insured, 5.125%, 6/1/17                                    Aaa/AAA          1,965,000            1,770,347
-----------------------------------------------------------------------------------------------------------------
 Los Angeles, CA Department Water & Power
 Waterworks RRB, 6.40%, 5/15/28                                    Aa3/AA          7,200,000            7,317,936
-----------------------------------------------------------------------------------------------------------------
 Los Angeles, CA Harbor Department RB,
 Series B, 5.375%, 11/1/23                                      Aa3/AA/AA          5,000,000            4,425,200

</TABLE>

                   10  OPPENHEIMER CALIFORNIA MUNICIPAL FUND




<PAGE>

<TABLE>
<CAPTION>




                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                <C>                   <C>
 CALIFORNIA Continued
 Modesto, CA Irrigation District FAU RRB,
 Series A, MBIA Insured, 6%, 10/1/15                              Aaa/AAA        $ 5,000,000           $5,116,200
-----------------------------------------------------------------------------------------------------------------
 Mountain View Los Altos, CA Union High SDI RB,
 Series B, 6.50%, 5/1/17                                           Aa2/AA          2,000,000            2,088,720
-----------------------------------------------------------------------------------------------------------------
 Oakland, CA Building Authority Lease RB,
 Series A, 5%, 4/1/16                                         Aaa/AAA/AAA          3,000,000            2,702,070
-----------------------------------------------------------------------------------------------------------------
 Oakland, CA RA TXAL Refunding Bonds,
 MBIA Insured, 5.95%, 9/1/19(3)                                   Aaa/AAA          8,600,000            8,424,302
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
 Aliso Viejo, Prerefunded, Series A, 7.10%, 8/15/05                NR/AAA          1,440,000            1,556,338
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
 Aliso Viejo, Prerefunded, Series A, 7.35%, 8/15/18                NR/AAA          7,000,000            7,605,360
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA CFD No. 99-1 SPTX RB,
 Series A, 6.70%, 8/15/29                                           NR/NR          1,600,000            1,551,008
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA Improvement Bond Act of 1915 RRB,
 Irvine Coast Assessment No. 88-1-A, 5.50%, 9/2/16                  NR/NR          2,450,000            2,102,198
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA Improvement Bond Act of 1915
 SPAST GOB, Assessment No. 88-1, 6.25%, 9/2/18                      NR/NR          2,130,000            2,005,139
-----------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Bonds, Los Medanos
 Community Development Project,
 AMBAC Insured, 5.80%, 8/1/17                                     Aaa/AAA          1,525,000            1,496,269
-----------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Bonds, Los Medanos
 Community Development Project,
 AMBAC Insured, 5.85%, 8/1/18                                     Aaa/AAA          1,615,000            1,581,973
-----------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Bonds, Los Medanos
 Community Development Project, AMBAC Insured,
 Zero Coupon, 6.10%, 8/1/20(1)                                    Aaa/AAA          5,150,000            1,439,682
-----------------------------------------------------------------------------------------------------------------
 Pittsburg, CA RA TXAL Refunding Bonds,
 Los Medanos Community Development Project,
 Sub. Lien, 6.20%, 8/1/19                                          NR/BBB          2,500,000            2,341,075
-----------------------------------------------------------------------------------------------------------------
 Placentia, CA PFAU SPTX RB, Jr. Lien,
 Series B, 6.60%, 9/1/15                                            NR/NR          1,600,000            1,595,104
-----------------------------------------------------------------------------------------------------------------
 Pomona, CA SFM RRB, Escrowed to Maturity,
 Series A, 7.60%, 5/1/23                                          Aaa/AAA          4,500,000            5,280,300
-----------------------------------------------------------------------------------------------------------------
 Pomona, CA SFM RRB, Escrowed to Maturity,
 Series B, 7.50%, 8/1/23                                          Aaa/AAA            500,000              581,040
-----------------------------------------------------------------------------------------------------------------
 Pomona, CA USD GORB, Series A,
 MBIA Insured, 6.15%, 8/1/15                                      Aaa/AAA          2,000,000            2,097,480
-----------------------------------------------------------------------------------------------------------------
 Port Oakland, CA POAU RB, Series G,
 MBIA Insured, 5.375%, 11/1/25                                Aaa/AAA/AAA         10,650,000            9,383,395
-----------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 FGIC Insured, Inverse Floater, 7.79%, 6/1/19(2)              Aaa/AAA/AAA          4,000,000            3,685,000
-----------------------------------------------------------------------------------------------------------------
 Redding, CA Electric System Revenue COP,
 MBIA Insured, Inverse Floater, 8.80%, 7/8/22(2)                  Aaa/AAA          2,500,000            2,712,500
</TABLE>


                   11 OPPENHEIMER CALIFORNIA MUNICIPAL FUND






<PAGE>

<TABLE>
<CAPTION>


STATEMENT OF INVESTMENTS Unaudited/Continued



                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                             <C>              <C>                  <C>
 CALIFORNIA Continued
 Richmond, CA Improvement Bond Act of 1915
 GORB, Reassessment District No. 855, 6.60%, 9/2/19                 NR/NR        $ 1,500,000          $ 1,483,815
-----------------------------------------------------------------------------------------------------------------
 Richmond, CA Wastewater RB, FGIC Insured,
 5.80%, 8/1/18                                                    Aaa/AAA          3,315,000            3,279,828
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
 Prerefunded, 7.55%, 9/1/17                                         NR/NR          3,000,000            3,122,880
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA PFAU Refunding COP,
 5.75%, 5/15/19                                                   NR/BBB-          2,100,000            1,759,989
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA PFAU TXAL RRB,
 Redevelopment Projects, Series A, 5.625%, 10/1/33              Baa2/BBB-          6,600,000            5,416,290
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA Refunding COP, Air Force
 Village West, Inc., Prerefunded, Series A,
 8.125%, 6/15/12                                                    NR/NR          3,000,000            3,282,150
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA Refunding COP, Air Force
 Village West, Inc., Series A, 8.125%, 6/15/20                      NR/NR          3,000,000            3,289,980
-----------------------------------------------------------------------------------------------------------------
 Riverside Cnty., CA SFM RB, Escrowed to Maturity,
 Series A, 7.80%, 5/1/21                                          Aaa/AAA          4,285,000            5,142,600
-----------------------------------------------------------------------------------------------------------------
 Roseville, CA SPTX RB, Woodcreek West
 Community Facility No. 1 Project, 5.875%, 9/1/08                   NR/NR          1,235,000            1,206,348
-----------------------------------------------------------------------------------------------------------------
 Roseville, CA SPTX RB, Woodcreek West
 Community Facility No. 1 Project, 6.70%, 9/1/25                    NR/NR          1,750,000            1,682,730
-----------------------------------------------------------------------------------------------------------------
 Sacramento Cnty., CA SFM RB, Escrowed to
 Maturity, 8%, 7/1/16(4)                                          Aaa/AAA         10,000,000           12,170,400
-----------------------------------------------------------------------------------------------------------------
 Sacramento, CA Cogeneration Authority RB,
 Procter & Gamble Project, 6.50%, 7/1/14                       NR/BBB-/NR          5,000,000            5,474,550
-----------------------------------------------------------------------------------------------------------------
 Sacramento, CA MUD Electric RRB, FGIC Insured,
 Inverse Floater, 8.89%, 8/15/18(2)                           Aaa/AAA/AAA          5,500,000            5,747,500
-----------------------------------------------------------------------------------------------------------------
 Sacramento, CA PAU RB, Cogeneration Project,
 6%, 7/1/22                                                  NR/BBB-/BBB-          6,800,000            6,181,812
-----------------------------------------------------------------------------------------------------------------
 San Bernardino Cnty., CA COP, Medical Center
 Financing Project, MBIA Insured, 5.50%, 8/1/17                   Aaa/AAA          5,250,000            5,081,107
-----------------------------------------------------------------------------------------------------------------
 San Diego Cnty., CA COP, MBIA Insured, Inverse
 Floater, 8.995%, 11/18/19(2)                                       A1/NR          2,000,000            2,110,000
-----------------------------------------------------------------------------------------------------------------
 San Diego Cnty., CA Water Authority Revenue
 COP, Prerefunded, Series 91-B, MBIA Insured,
 Inverse Floater, 8.62%, 4/8/21(2)                                Aaa/AAA          3,000,000            3,506,250
-----------------------------------------------------------------------------------------------------------------
 San Francisco, CA Bay Area Rapid Transit District
 Sales Tax RB, 5.25%, 7/1/14                                   Aa3/AA-/AA          1,500,000            1,446,300
-----------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. Redevelopment
 FAU TXAL Refunding Bonds, CAP Redevelopment
 Projects, Series C, Zero Coupon, 5.79%, 8/1/11(1)               A2/A/AAA          1,650,000              873,774
-----------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. Redevelopment
 FAU TXAL Refunding Bonds, CAP Redevelopment
 Projects, Series C, Zero Coupon, 5.89%, 8/1/12(1)               A2/A/AAA          1,750,000              866,302

</TABLE>


                   12 OPPENHEIMER CALIFORNIA MUNICIPAL FUND






<PAGE>


<TABLE>
<CAPTION>



                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                         <C>                  <C>                  <C>
 CALIFORNIA Continued
 San Francisco, CA City & Cnty. Redevelopment
 FAU TXAL Refunding Bonds, CAP Redevelopment
 Projects, Series C, Zero Coupon, 5.81%, 8/1/14(1)               A2/A/AAA        $ 1,925,000          $   827,866
-----------------------------------------------------------------------------------------------------------------
 San Francisco, CA City & Cnty. Redevelopment FAU
 TXAL Refunding Bonds, Series C, Zero Coupon,
 5.69%, 8/1/10(1)                                                A2/A/AAA          1,650,000              933,867
-----------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road CAP RRB, Series A, 0%/5.75%, 1/15/21(5)          Baa3/BBB-/BBB         11,800,000            6,877,394
-----------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor Agency
 Toll Road CAP RRB, Series A, MBIA Insured,
 Zero Coupon, 5.73%, 1/15/25(1)                               Aaa/AAA/AAA         18,250,000            3,802,570
-----------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor
 Agency Toll Road CAP RRB, Series A, MBIA Insured,
 Zero Coupon, 5.90%, 1/15/26(1)                               Aaa/AAA/AAA         15,000,000            2,927,550
-----------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor
 Agency Toll Road RB, Sr. Lien, 5%, 1/1/33                  Baa3/BBB-/BBB          8,000,000            6,355,680
-----------------------------------------------------------------------------------------------------------------
 San Joaquin Hills, CA Transportation Corridor
 Agency Toll Road RB, Sr. Lien, Prerefunded,
 6.75%, 1/1/32                                                Aaa/AAA/AAA          7,000,000            7,541,660
-----------------------------------------------------------------------------------------------------------------
 Santa Ana, CA FAU RRB, Inner-City Commuter,
 Series C, 5.60%, 9/1/19                                           NR/BBB          3,060,000            2,621,655
-----------------------------------------------------------------------------------------------------------------
 Santa Ana, CA FAU RRB, Mainplace Project,
 Series D, 5.50%, 9/1/15                                            NR/NR          1,000,000              869,690
-----------------------------------------------------------------------------------------------------------------
 Santa Ana, CA FAU RRB, Mainplace Project,
 Series D, 5.60%, 9/1/19                                            NR/NR          1,000,000              860,570
-----------------------------------------------------------------------------------------------------------------
 Southern CA Home FAU SFM RB, Series A,
 7.35%, 9/1/24                                                     NR/AAA          1,115,000            1,142,563
-----------------------------------------------------------------------------------------------------------------
 Southern CA Metropolitan Water District
 Waterworks RRB, Inverse Floater, 6.56%, 10/30/20(2)               Aa2/AA          3,300,000            2,875,125
-----------------------------------------------------------------------------------------------------------------
 Southern CA PPAU Transmission Project RB,
 Inverse Floater, 7.25%, 7/1/12(2)                                 Aa3/A+          1,900,000            1,978,375
-----------------------------------------------------------------------------------------------------------------
 Stockton, CA CFD No. 90-2 SPTX RRB,
 Brookside Estates, 6.20%, 8/1/15                                   NR/NR          1,750,000            1,674,698
-----------------------------------------------------------------------------------------------------------------
 Tustin, CA USD CFD No. 88-1 SPTX RB,
 Prerefunded, Series B, 6.375%, 9/1/21                              NR/NR          3,500,000            3,853,850
-----------------------------------------------------------------------------------------------------------------
 University of CA Regents RB, Multiple Purpose
 Projects, Prerefunded, Series A, 6.875%, 9/1/16                  Aa3/AAA          1,950,000            2,098,805
-----------------------------------------------------------------------------------------------------------------
 West Sacremento, CA Improvement Bond Act
 of 1915 SPAST Refunding Bonds, 5.60%, 9/2/17                       NR/NR          2,000,000            1,710,320
-----------------------------------------------------------------------------------------------------------------
 Yuba City, CA USD Refunding COP,
 Series A, 5%, 2/1/17                                             Aaa/AAA          3,010,000            2,675,800
                                                                                                      -----------

                                                                                                      370,352,320

</TABLE>

                    13 Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>



STATEMENT OF INVESTMENTS  Unaudited/Continued



                                                                RATINGS:
                                                                MOODY'S/                FACE         MARKET VALUE
                                                                S&P/FITCH             AMOUNT           SEE NOTE 1
-----------------------------------------------------------------------------------------------------------------
<S>                                                           <C>                 <C>                 <C>
 U.S. POSSESSIONS--4.5%
 Guam PAU RB, Series A, 6.625%, 10/1/14                            NR/AAA         $2,000,000          $ 2,179,800
-----------------------------------------------------------------------------------------------------------------
 PR CMWLTH GORB, MBIA Insured,
 Inverse Floater, 7.78%, 7/1/08(2)                                Aaa/AAA          3,500,000            3,648,750
-----------------------------------------------------------------------------------------------------------------
 PR EPAU RB, Prerefunded, Series P, 7%, 7/1/21                    Aaa/AAA          4,000,000            4,222,320
-----------------------------------------------------------------------------------------------------------------
 PR HFA SFM RB, Affordable Housing Mtg.
 Portfolio I, 6.25%, 4/1/29                                       Aaa/AAA          2,375,000            2,358,660
-----------------------------------------------------------------------------------------------------------------
 PR Housing Finance Corp. SFM RB, Portfolio 1,
 Series B, 7.65%, 10/15/22                                        Aaa/AAA            145,000              148,985
-----------------------------------------------------------------------------------------------------------------
 PR Industrial, Medical & Environmental PC
 Facilities Tourist RB, Mennonite General Hospital
 Project, Series A, 6.50%, 7/1/12                             NR/BBB-/BBB          2,350,000            2,234,733
-----------------------------------------------------------------------------------------------------------------
 Virgin Islands PFAU RB, Series A, 6.375%, 10/1/19                NR/BBB-          3,000,000            2,902,830
                                                                                                   --------------
                                                                                                       17,696,078
                                                                                                   --------------
 Total Municipal Bonds and Notes (Cost $401,927,975)                                                  388,048,398


=================================================================================================================
 SHORT-TERM TAX-EXEMPT OBLIGATIONS--0.8%

 Los Angeles Cnty., CA Pension Obligation RB,
 Series B, AMBAC Insured, 2.30%, 6/30/00(3)                                        1,200,000            1,200,000
-----------------------------------------------------------------------------------------------------------------
 Orange Cnty., CA Special FAU Teeter Plan RB,
 Series B, AMBAC Insured, 2.45%, 2/1/00(3)                                         2,000,000            2,000,000
                                                                                                   --------------
 Total Short-Term Tax-Exempt Obligations (Cost $3,200,000)                                              3,200,000
-----------------------------------------------------------------------------------------------------------------
 TOTAL  INVESTMENTS, AT VALUE (COST $405,127,975)                                       99.1%         391,248,398
-----------------------------------------------------------------------------------------------------------------
 OTHER ASSETS NET OF LIABILITIES                                                         0.9            3,611,728
                                                                                   ------------------------------
 NET ASSETS                                                                            100.0%        $394,860,126
                                                                                   ==============================

</TABLE>

                   14   Oppenheimer California Municipal Fund



<PAGE>






FOOTNOTES TO STATEMENT OF INVESTMENTS

To simplify the  listings of  securities,  abbreviations  are used per the table
below:



<TABLE>
<S>        <C>                                          <C>         <C>

CAP        Capital Appreciation                         PCFAU       Pollution Control Finance Authority
CDAU       Communities Development Authority            PFAU        Public Finance Authority
CFD        Community Facilities District                POAU        Port Authority
CMWLTH     Commonwealth                                 PPAU        Public Power Authority
COP        Certificates of Participation                PWBL        Public Works Board Lease
ED         Economic Development                         RA          Redevelopment Agency
EPAU       Electric Power Authority                     RB          Revenue Bonds
FA         Facilities Authority                         RRB         Revenue Refunding Bonds
FAU        Finance Authority                            SCDAU       Statewide Communities Development Authority
GOB        General Obligation Bonds                     SDI         School District
GORB       General Obligation Refunding Bonds           SFM         Single Family Mtg.
HF         Health Facilities                            SPAST       Special Assessment
HFA        Housing Finance Agency                       SPTX        Special Tax
HFFAU      Health Facilities Finance Authority          SWD         Solid Waste Disposal
MUD        Municipal Utility District                   TXAL        Tax Allocation
PAU        Power Authority                              USD         Unified School District
PC         Pollution Control
</TABLE>


1. For zero coupon bonds,  the interest rate shown is the effective yield on the
date of purchase.

2.  Represents  the current  interest  rate for a variable rate bond known as an
"inverse  floater"  which pays  interest  at a rate that varies  inversely  with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income.  Their price may be more volatile than the price of a comparable
fixed-rate  security.  Inverse  floaters  amount to  $39,225,387 or 9.93% of the
Fund's net assets as of January 31, 2000.

3.  Represents  the  current  interest  rate for a variable or  increasing  rate
security.

4.  Securities  with  an  aggregate  market  value  of  $1,592,500  are  held in
collateralized  accounts to cover initial  margin  requirements  on open futures
sales contracts. See Note 5 of Notes to Financial Statements.

5. Denotes a step bond: a zero coupon bond that  converts to a fixed or variable
interest rate at a designated future date.

                    15 Oppenheimer California Municipal Fund



<PAGE>





STATEMENT OF INVESTMENTS   Unaudited/Continued

FOOTNOTES TO STATEMENT OF INVESTMENTS Continued

AS OF JANUARY 31, 2000, SECURITIES SUBJECT TO THE ALTERNATIVE MINIMUM TAX AMOUNT
TO $57,188,877 OR 14.48% OF THE FUND'S NET ASSETS.

DISTRIBUTION OF INVESTMENTS BY INDUSTRY, AS A PERCENTAGE OF TOTAL INVESTMENTS AT
VALUE, IS AS FOLLOWS:
<TABLE>
<CAPTION>



INDUSTRY                                               MARKET VALUE        PERCENT
----------------------------------------------------------------------------------
<S>                                                    <C>                   <C>

Special Assessment                                     $112,136,643           28.7%
Municipal Leases                                         43,909,271           11.2
Single Family Housing                                    41,811,196           10.7
Highways                                                 36,178,337            9.3
Electric Utilities                                       32,181,857            8.2
Adult Living Facilities                                  25,168,667            6.4
Hospital/Healthcare                                      22,742,887            5.8
Marine/Aviation Facilities                               21,465,212            5.5
Water Utilities                                          18,815,511            4.9
General Obligation                                       12,244,194            3.1
Not-for-Profit Organization                               9,479,550            2.4
Sewer Utilities                                           4,742,008            1.2
Sales Tax                                                 4,349,130            1.1
Higher Education                                          4,009,120            1.0
Education                                                 1,483,530            0.4
Resource Recovery                                           531,285            0.1
                                                       ---------------------------
Total                                                  $391,248,398          100.0%
                                                       ===========================
</TABLE>





See accompanying Notes to Financial Statements.

                   16   Oppenheimer California Municipal Fund



<PAGE>







STATEMENT OF ASSETS AND LIABILITIES Unaudited
<TABLE>
<CAPTION>



January 31, 2000
==================================================================================

ASSETS
<S>                                                                   <C>
Investments, at value (cost $405,127,975)--see accompanying statement $391,248,398
----------------------------------------------------------------------------------
Cash                                                                     1,768,437
----------------------------------------------------------------------------------
Receivables and other assets:
Interest                                                                 6,046,989
Shares of beneficial interest sold                                         358,454
Daily variation on futures contracts                                       274,063
Other                                                                       10,249
                                                                    --------------
Total assets                                                           399,706,590

==================================================================================
LIABILITIES Payables and other liabilities:
Investments purchased                                                    2,003,396
Shares of beneficial interest redeemed                                   1,335,552
Dividends                                                                1,172,965
Trustees' compensation                                                     163,288
Distribution and service plan fees                                          86,325
Transfer and shareholder servicing agent fees                               19,477
Other                                                                       65,461
                                                                    --------------
Total liabilities                                                        4,846,464

==================================================================================
NET ASSETS                                                            $394,860,126
                                                                    ==============

==================================================================================
COMPOSITION OF NET ASSETS
Paid-in capital                                                       $423,162,561
----------------------------------------------------------------------------------
Overdistributed net investment income                                     (950,895)
----------------------------------------------------------------------------------
Accumulated net realized loss on investment transactions               (13,657,121)
----------------------------------------------------------------------------------
Net unrealized depreciation on investments                             (13,694,419)
                                                                    --------------
Net assets                                                            $394,860,126
                                                                    ==============
</TABLE>

================================================================================
NET ASSET VALUE PER SHARE
Class A Shares:
Net  asset  value  and  redemption  price  per  share  (based  on net  assets of
$271,115,987 and 28,029,768  shares of beneficial  interest  outstanding)  $9.67

Maximum  offering price per share (net asset value plus sales charge of 4.75% of
offering price)                                                           $10.15
--------------------------------------------------------------------------------
Class B Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and offering  price per share (based on net assets of  $109,713,187  and
11,338,844 shares of beneficial interest outstanding)                      $9.68
--------------------------------------------------------------------------------
Class C Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and  offering  price per share (based on net assets of  $14,030,952  and
1,452,580 shares of beneficial interest outstanding)                       $9.66



See accompanying Notes to Financial Statements.

                   17  Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>






STATEMENT OF OPERATIONS  Unaudited


For the Six Months Ended January 31, 2000
-----------------------------------------------------------------------------------
INVESTMENT INCOME
<S>                                                                    <C>
Interest                                                               $13,592,960
===================================================================================
EXPENSES
Management fees                                                          1,223,433
-----------------------------------------------------------------------------------
Distribution and service plan fees:
Class A                                                                    364,279
Class B                                                                    616,706
Class C                                                                     79,122
-----------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees                              115,799
-----------------------------------------------------------------------------------
Custodian fees and expenses                                                 27,005
-----------------------------------------------------------------------------------
Trustees' compensation                                                      15,213
-----------------------------------------------------------------------------------
Other                                                                       62,772
                                                                      -------------
Total expenses                                                           2,504,329
Less expenses paid indirectly                                               (7,503)
Less reimbursement of expenses                                              (3,807)
                                                                      -------------
Net expenses                                                             2,493,019

===================================================================================
NET INVESTMENT INCOME                                                   11,099,941

===================================================================================
REALIZED AND UNREALIZED GAIN (LOSS) Net realized gain (loss) on:
Investments                                                            (13,551,568)
Closing of futures contracts                                               542,847
                                                                      -------------
Net realized loss                                                      (13,008,721)

-----------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation on investments   (25,859,618)
                                                                      -------------
Net realized and unrealized loss                                       (38,868,339)
===================================================================================

NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS                  $(27,768,398)
                                                                      =============

</TABLE>


 See accompanying Notes to Financial Statements.

                  18     Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>






 STATEMENTS OF CHANGES IN NET ASSETS




                                                                   SIX MONTHS ENDED
                                                                   JANUARY 31, 2000         YEAR ENDED
                                                                        (UNAUDITED)      JULY 31, 1999
------------------------------------------------------------------------------------------------------

OPERATIONS
<S>                                                                   <C>                 <C>
Net investment income                                                 $  11,099,941       $ 20,869,032
------------------------------------------------------------------------------------------------------
Net realized gain (loss)                                                (13,008,721)           366,714
------------------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation                   (25,859,618)       (16,235,114)
                                                                     ---------------------------------
Net increase (decrease) in net assets resulting from operations         (27,768,398)         5,000,632

======================================================================================================
DIVIDENDS  AND/OR  DISTRIBUTIONS  TO SHAREHOLDERS
Dividends from net investment income:
Class A                                                                  (7,884,363)       (15,214,034)
Class B                                                                  (2,726,647)        (5,284,436)
Class C                                                                    (350,954)          (600,129)

======================================================================================================
BENEFICIAL STOCK TRANSACTIONS
Net  increase  (decrease)  in net  assets  resulting  from  beneficial  interest
transactions:
Class A                                                                 (18,774,924)        26,403,170
Class B                                                                 (12,177,286)        22,044,556
Class C                                                                  (1,446,946)         6,138,090


======================================================================================================
NET ASSETS
Total increase (decrease)                                               (71,129,518)        38,487,849
------------------------------------------------------------------------------------------------------
Beginning of period                                                     465,989,644        427,501,795
                                                                     ---------------------------------
End of period (including overdistributed net investment income of
$950,895 and $1,088,872, respectively)                                 $394,860,126       $465,989,644
                                                                     =================================

</TABLE>




See accompanying Notes to Financial Statements.

                   19   Oppenheimer California Municipal Fund



<PAGE>




 FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>




                                            SIX MONTHS                                           YEAR        YEAR
                                                 ENDED                                          ENDED       ENDED
                                         JAN. 31, 2000                                       JULY 31,    DEC. 31,
CLASS A                                    (UNAUDITED)       1999        1998        1997       1996(1)      1995
=================================================================================================================
<S>                                           <C>        <C>         <C>          <C>         <C>        <C>

PER SHARE OPERATING DATA
Net asset value, beginning of period            $10.57    $ 10.92     $ 10.94      $ 10.39     $ 10.69    $  9.45
-----------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                              .27        .53         .54          .58         .33        .58
Net realized and unrealized gain (loss)           (.90)      (.35)        .06          .54        (.30)      1.25
                                                -----------------------------------------------------------------
Total income (loss) from investment
operations                                        (.63)       .18         .60         1.12         .03       1.83

-----------------------------------------------------------------------------------------------------------------
Dividends and/or distributions to shareholders:
Dividends from net investment income              (.27)      (.53)       (.54)        (.57)       (.33)      (.58)
Dividends in excess of net investment
income                                              --         --          --           --          --       (.01)
Distributions from net realized gain                --         --        (.08)          --          --         --
                                                -----------------------------------------------------------------

Total dividends and/or distributions
to shareholders                                   (.27)      (.53)       (.62)        (.57)       (.33)      (.59)
-----------------------------------------------------------------------------------------------------------------
Net asset value, end of period                  $ 9.67     $10.57      $10.92       $10.94      $10.39     $10.69
                                                =================================================================


=================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)              (6.07)%     1.59%       5.66%       11.11%       0.34%     19.76%

=================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)      $271,116   $316,363    $300,717     $298,162    $286,033   $285,307
-----------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)             $297,257   $314,094    $297,372     $289,439    $279,796   $250,188
-----------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                             5.32%      4.79%       4.91%        5.49%       5.53%      5.64%
Expenses                                           .90%      0.91%       0.92%(4)     0.94%(4)    0.97%(4)   0.95%(4)
-----------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                          25%        35%         31%          31%         14%        23%

</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from December 31 to July 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense  ratio has not been grossed up to reflect the effect of expenses paid
indirectly.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended January 31, 2000, were $107,856,860 and $145,553,349, respectively.

See accompanying Notes to Financial Statements.

                   20   Oppenheimer California Municipal Fund




<PAGE>

<TABLE>
<CAPTION>








                                                      SIX MONTHS                                         YEAR         YEAR
                                                           ENDED                                        ENDED        ENDED
                                                   JAN. 31, 2000                                     JULY 31,     DEC. 31,
CLASS B                                              (UNAUDITED)       1999        1998        1997     1996(1)       1995
===========================================================================================================================
<S>                                                    <C>        <C>         <C>          <C>        <C>           <C>

PER SHARE OPERATING DATA
Net asset value, beginning of period                     $10.57     $10.92      $10.94      $10.39     $10.69       $  9.44
---------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                       .23        .45         .46         .49        .28           .51
Net realized and unrealized gain (loss)                    (.89)      (.35)        .06         .55       (.30)         1.25
                                                        -------------------------------------------------------------------
Total income (loss) from investment
operations                                                 (.66)       .10         .52        1.04       (.02)         1.76
---------------------------------------------------------------------------------------------------------------------------
Dividends and/or distributions to shareholders:
Dividends from net investment income                       (.23)      (.45)       (.46)       (.49)      (.28)         (.50)
Dividends in excess of net investment income                 --         --          --          --         --          (.01)
Distributions from net realized gain                         --         --        (.08)         --         --            --
                                                        -------------------------------------------------------------------
Total dividends and/or distributions
to shareholders                                            (.23)      (.45)       (.54)       (.49)      (.28)         (.51)
---------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                          $  9.68     $10.57      $10.92      $10.94     $10.39        $10.69
                                                        ===================================================================

===========================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                       (6.34)%     0.82%       4.86%      10.27%     (0.12)%       18.97%

===========================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)               $109,713   $132,763    $115,444     $82,474    $52,038       $41,224
---------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                      $122,265   $129,538    $ 99,266     $65,192    $46,422       $29,918
---------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                      4.55%      4.03%       4.21%       4.70%      4.74%        4.82%
Expenses                                                   1.66%      1.67%       1.67%(4)    1.70%(4)   1.74%(4)     1.72%(4)
---------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                   25%        35%         31%         31%         14%         23%
</TABLE>



1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from December 31 to July 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense  ratio has not been grossed up to reflect the effect of expenses paid
indirectly.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended January 31, 2000, were $107,856,860 and $145,553,349, respectively.

See accompanying Notes to Financial Statements.

                   21   Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>







FINANCIAL HIGHLIGHTS  Continued


                                                   SIX MONTHS                                           YEAR     PERIOD
                                                        ENDED                                          ENDED      ENDED
                                                JAN. 31, 2000                                       JULY 31,   DEC. 31,
CLASS C                                           (UNAUDITED)       1999        1998        1997        1996(1)    1995(6)
=======================================================================================================================
<S>                                                   <C>        <C>         <C>          <C>        <C>         <C>

PER SHARE OPERATING DATA
Net asset value, beginning of period                   $10.55    $ 10.91     $ 10.93     $ 10.38    $ 10.68     $ 10.46
-----------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                     .23        .45         .46         .49        .27         .08
Net realized and unrealized gain (loss)                  (.89)      (.36)        .06         .55       (.30)        .22
                                                       ----------------------------------------------------------------
Total income (loss) from investment
operations                                               (.66)       .09         .52        1.04       (.03)        .30
-----------------------------------------------------------------------------------------------------------------------
Dividends and/or distributions to shareholders:
Dividends from net investment income                     (.23)      (.45)       (.46)       (.49)      (.27)       (.07)
Dividends in excess of net investment income               --         --          --          --         --        (.01)
Distributions from net realized gain                       --         --        (.08)         --         --          --
                                                       ----------------------------------------------------------------
Total dividends and/or distributions
to shareholders                                          (.23)      (.45)       (.54)       (.49)      (.27)       (.08)
-----------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                         $ 9.66     $10.55      $10.91      $10.93     $10.38      $10.68
                                                       ================================================================

=======================================================================================================================
TOTAL RETURN, AT NET ASSET VALUE(2)                     (6.35)%     0.73%       4.87%      10.26%     (0.19)%      2.90%


=======================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)              $14,031    $16,864     $11,340      $5,969     $2,171        $125
-----------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                     $15,688    $14,672     $ 8,614      $3,869     $1,156        $ 91
-----------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                    4.56%      4.03%       4.24%       4.66%      4.54%       4.56%
Expenses                                                 1.66%      1.67%       1.66%(4)    1.70%(4)   1.80%(4)    1.68%(4)
-----------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                 25%        35%         31%         31%        14%         23%
</TABLE>


1. For the seven months  ended July 31,  1996.  The Fund changed its fiscal year
end from December 31 to July 31.

2. Assumes a $1,000  hypothetical  initial investment on the business day before
the  first  day of the  fiscal  period  (or  inception  of  offering),  with all
dividends and distributions  reinvested in additional shares on the reinvestment
date, and redemption at the net asset value  calculated on the last business day
of the fiscal  period.  Sales  charges are not  reflected in the total  returns.
Total returns are not annualized for periods of less than one full year.

3. Annualized for periods of less than one full year.

4. Expense  ratio has not been grossed up to reflect the effect of expenses paid
indirectly.

5. The  lesser  of  purchases  or sales of  portfolio  securities  for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period.  Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term  securities) for the period
ended January 31, 2000, were $107,856,860 and $145,553,349, respectively.

6. For the period from November 1, 1995  (inception of offering) to December 31,
1995.

See accompanying Notes to Financial Statements.

                 22      Oppenheimer California Municipal Fund



<PAGE>







NOTES TO FINANCIAL STATEMENTS  Unaudited

================================================================================
1. SIGNIFICANT ACCOUNTING POLICIES

Oppenheimer  California  Municipal  Fund  (the  Fund) is  registered  under  the
Investment  Company Act of 1940,  as  amended,  as a  non-diversified,  open-end
management  investment  company.  The Fund's investment  objective is to seek as
high a level of current  interest  income  exempt from  federal  and  California
income taxes for  individual  investors as is consistent  with  preservation  of
capital. The Fund's investment advisor is OppenheimerFunds, Inc. (the Manager).

      The Fund  offers  Class A, Class B and Class C shares.  Class A shares are
sold at their offering price,  which is normally net asset value plus an initial
sales  charge.  Class B and Class C shares are sold  without  an  initial  sales
charge but may be subject to a  contingent  deferred  sales charge  (CDSC).  All
classes  of  shares  have  identical  rights  to  earnings,  assets  and  voting
privileges, except that each class has its own expenses directly attributable to
that class and exclusive  voting rights with respect to matters  affecting  that
class.  Classes A, B and C shares  have  separate  distribution  and/or  service
plans.  Class B shares  will  automatically  convert to Class A shares six years
after the date of purchase. The following is a summary of significant accounting
policies consistently followed by the Fund.

--------------------------------------------------------------------------------
SECURITIES VALUATION.  Securities for which quotations are readily available are
valued at the last sale price,  or if in the absence of a sale, at the last sale
price on the prior trading day if it is within the spread of the closing bid and
asked  prices,  and if not,  at the  closing  bid price.  Securities  (including
restricted securities) for which quotations are not readily available are valued
primarily  using  dealer-supplied   valuations,   a  portfolio  pricing  service
authorized  by the Board of  Trustees,  or at their  fair  value.  Fair value is
determined  in good  faith  under  consistently  applied  procedures  under  the
supervision  of the Board of  Trustees.  Short-term  "money  market  type"  debt
securities  with  remaining  maturities of sixty days or less are valued at cost
(or last determined  market value) and adjusted for amortization or accretion to
maturity of any premium or discount.

--------------------------------------------------------------------------------
ALLOCATION OF INCOME,  EXPENSES,  GAINS AND LOSSES. Income, expenses (other than
those attributable to a specific class), gains and losses are allocated daily to
each  class  of  shares  based  upon  the  relative  proportion  of  net  assets
represented  by  such  class.  Operating  expenses  directly  attributable  to a
specific class are charged against the operations of that class.

--------------------------------------------------------------------------------
FEDERAL  TAXES.  The Fund intends to continue to comply with  provisions  of the
Internal  Revenue Code  applicable  to  regulated  investment  companies  and to
distribute  all of its  taxable  income,  including  any  net  realized  gain on
investments  not  offset by loss  carryovers,  to  shareholders.  Therefore,  no
federal  income or excise tax  provision is required.  As of July 31, 1999,  the
Fund had available for federal tax purposes an unused  capital loss carryover of
approximately $650,000, which expires in 2006.

                 23       Oppenheimer California Municipal Fund



<PAGE>





NOTES TO FINANCIAL STATEMENTS  Unaudited/Continued

================================================================================
1. SIGNIFICANT ACCOUNTING POLICIES Continued

TRUSTEES' COMPENSATION. The Fund has adopted an unfunded retirement plan for the
Fund's independent Board of Trustees. Benefits are based on years of service and
fees paid to each  trustee  during the years of  service.  During the six months
ended January 31, 2000, a provision of $4,012 was made for the Fund's  projected
benefit  obligations,  resulting in an  accumulated  liability of $163,174 as of
January 31, 2000.

      The  Board of  Trustees  has  adopted  a  deferred  compensation  plan for
independent trustees that enables trustees to elect to defer receipt of all or a
portion of annual compensation they are entitled to receive from the Fund. Under
the plan,  the  compensation  deferred  is  periodically  adjusted  as though an
equivalent  amount had been  invested for the Board of Trustees in shares of one
or more Oppenheimer funds selected by the trustee.  The amount paid to the Board
of Trustees under the plan will be determined  based upon the performance of the
selected  funds.  Deferral of trustees'  fees under the plan will not affect the
net  assets of the Fund,  and will not  materially  affect  the  Fund's  assets,
liabilities or net investment income per share.

--------------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS. Dividends and distributions to
shareholders, which are determined in accordance with income tax regulations,
are recorded on the ex-dividend date.

--------------------------------------------------------------------------------
CLASSIFICATION  OF DISTRIBUTIONS TO SHAREHOLDERS.  Net investment  income (loss)
and net  realized  gain  (loss)  may  differ  for  financial  statement  and tax
purposes.  The  character  of  distributions  made  during  the  year  from  net
investment   income  or  net  realized   gains  may  differ  from  its  ultimate
characterization  for  federal  income  tax  purposes.  Also,  due to  timing of
dividend  distributions,  the fiscal year in which amounts are  distributed  may
differ from the fiscal year in which the income or realized gain was recorded by
the Fund.

--------------------------------------------------------------------------------
EXPENSE OFFSET ARRANGEMENTS. Expenses paid indirectly represent a reduction of
custodian fees for earnings on cash balances maintained by the Fund.

--------------------------------------------------------------------------------
OTHER.  Investment  transactions  are accounted  for as of trade date.  Original
issue  discount is accreted and premium is amortized in accordance  with federal
income tax  requirements.  For municipal bonds acquired after April 30, 1993, on
disposition or maturity,  taxable ordinary income is recognized to the extent of
the lesser of gain or market  discount  that would have accrued over the holding
period. Realized gains and losses on investments and unrealized appreciation and
depreciation are determined on an identified cost basis, which is the same basis
used for federal income tax purposes.

      There are certain  risks  arising  from  geographic  concentration  in any
state.  Certain  revenue or tax related events in a state may impair the ability
of certain  issuers of municipal  securities  to pay  principal  and interest on
their obligations.

                 24      Oppenheimer California Municipal Fund



<PAGE>





The preparation of financial  statements in conformity  with generally  accepted
accounting principles requires management to make estimates and assumptions that
affect  the  reported  amounts  of assets  and  liabilities  and  disclosure  of
contingent  assets and  liabilities at the date of the financial  statements and
the reported amounts of income and expenses during the reporting period.  Actual
results could differ from those estimates.

================================================================================
2. SHARES OF BENEFICIAL INTEREST

The Fund has authorized an unlimited number of no par value shares of beneficial
interest of each class.  Transactions  in shares of beneficial  interest were as
follows:

<TABLE>
<CAPTION>



                                    SIX MONTHS ENDED JAN. 31, 2000         YEAR ENDED JULY 31, 1999
                               -----------------------------------      ---------------------------
                                          SHARES            AMOUNT         SHARES            AMOUNT
---------------------------------------------------------------------------------------------------
<S>                                   <C>            <C>               <C>            <C>

CLASS A
Sold                                   2,265,606     $  23,026,874      6,301,987     $  69,153,860
Dividends and/or
distributions reinvested                 460,699         4,664,291        818,090         8,975,978
Redeemed                              (4,637,740)      (46,466,089)    (4,716,845)      (51,726,668)
                                    ---------------------------------------------------------------
Net increase (decrease)               (1,911,435)     $(18,774,924)     2,403,232       $26,403,170
                                    ===============================================================

---------------------------------------------------------------------------------------------------
CLASS B
Sold                                     726,465      $  7,357,035      3,406,294      $ 37,480,696
Dividends and/or
distributions reinvested                 167,716         1,698,985        301,331         3,307,444
Redeemed                              (2,115,668)      (21,233,306)    (1,715,264)      (18,743,584)
                                    ---------------------------------------------------------------
Net increase (decrease)               (1,221,487)     $(12,177,286)     1,992,361       $22,044,556
                                    ===============================================================

---------------------------------------------------------------------------------------------------
CLASS C
Sold                                     218,864      $  2,206,041        856,519     $   9,406,000
Dividends and/or
distributions reinvested                  22,306           225,194         37,673           412,830
Redeemed                                (386,780)       (3,878,181)      (335,760)       (3,680,740)
                                    ---------------------------------------------------------------
Net increase (decrease)                 (145,610)     $ (1,446,946)       558,432       $ 6,138,090
                                    ===============================================================

</TABLE>


================================================================================
3. UNREALIZED GAINS AND LOSSES ON SECURITIES

As of January 31, 2000, net unrealized depreciation on securities of $13,879,576
was composed of gross  appreciation  of $8,304,108,  and gross  depreciation  of
$22,183,684.

                 25      Oppenheimer California Municipal Fund



<PAGE>





NOTES TO FINANCIAL STATEMENTS  Unaudited/Continued

================================================================================
4. FEES AND OTHER TRANSACTIONS WITH AFFILIATES

MANAGEMENT FEES. Management fees paid to the Manager were in accordance with the
investment advisory agreement with the Fund which provides for a fee of 0.60% of
the first  $200  million of average  annual net  assets,  0.55% of the next $100
million,  0.50% of the next $200 million,  0.45% of the next $250 million, 0.40%
of the next $250 million and 0.35% of average annual net assets over $1 billion.
Effective  January 1, 2000,  the Manager has  voluntarily  undertaken to waive a
portion of its management  fee,  whereby the Fund pays a fee not to exceed 0.55%
of average  annual net  assets.  The Fund's  management  fees for the six months
ended January 31, 2000, was 0.55% of the average annual net assets of each class
of shares, annualized for periods of less than one full year.

--------------------------------------------------------------------------------
TRANSFER AGENT FEES. OppenheimerFunds Services (OFS), a division of the Manager,
is the  transfer  and  shareholder  servicing  agent  for the Fund and for other
Oppenheimer  funds.  OFS's total costs of providing  such services are allocated
ratably to these funds.

--------------------------------------------------------------------------------
DISTRIBUTION  AND SERVICE PLAN FEES. Under its General  Distributor's  Agreement
with the Manager,  the Distributor acts as the Fund's  principal  underwriter in
the continuous public offering of the different classes of shares of the Fund.

      The compensation paid to (or retained by) the Distributor from the sale of
shares or on the redemption of shares is shown in the table below for the period
indicated.

<TABLE>
<CAPTION>


                          AGGREGATE          CLASS A      COMMISSIONS      COMMISSIONS      COMMISSIONS
                          FRONT-END        FRONT-END       ON CLASS A       ON CLASS B       ON CLASS C
                      SALES CHARGES    SALES CHARGES           SHARES           SHARES           SHARES
                         ON CLASS A      RETAINED BY      ADVANCED BY      ADVANCED BY      ADVANCED BY
SIX MONTHS ENDED             SHARES      DISTRIBUTOR      DISTRIBUTOR(1)   DISTRIBUTOR(1)   DISTRIBUTOR(1)
-------------------------------------------------------------------------------------------------------
<S>                        <C>               <C>              <C>           <C>               <C>

January 31, 2000           $227,179          $52,614          $10,710       $210,820          $20,724

</TABLE>


1. The Distributor  advances commission payments to dealers for certain sales of
Class A  shares  and for  sales  of  Class B and  Class C  shares  from  its own
resources at the time of sale.

<TABLE>
<CAPTION>


                                     CLASS A                     CLASS B                        CLASS C
                         CONTINGENT DEFERRED         CONTINGENT DEFERRED            CONTINGENT DEFERRED
                               SALES CHARGES               SALES CHARGES                  SALES CHARGES
SIX MONTHS ENDED     RETAINED BY DISTRIBUTOR     RETAINED BY DISTRIBUTOR        RETAINED BY DISTRIBUTOR
-------------------------------------------------------------------------------------------------------
<S>                                      <C>                    <C>                              <C>

January 31, 2000                         $--                    $250,571                         $6,172

</TABLE>


The Fund has  adopted a Service  Plan for Class A shares  and  Distribution  and
Service Plans for Class B and Class C shares under Rule 12b-1 of the  Investment
Company  Act.  Under  those  plans  the Fund pays the  Distributor  for all or a
portion  of its  costs  incurred  in  connection  with the  distribution  and/or
servicing of the shares of the particular class.

                 26      Oppenheimer California Municipal Fund



<PAGE>





--------------------------------------------------------------------------------
CLASS A SERVICE  PLAN  FEES.  Under the Class A service  plan,  the  Distributor
currently  uses the fees it receives  from the Fund to pay brokers,  dealers and
other financial institutions. The Class A service plan permits reimbursements to
the Distributor at a rate of up to 0.25% of average annual net assets of Class A
shares purchased. The Distributor makes payments to plan recipients quarterly at
an annual rate not to exceed 0.25% of the average  annual net assets  consisting
of Class A shares  of the Fund.  For the six  months  ended  January  31,  2000,
payments under the Class A Plan totaled  $364,279,  all of which was paid by the
Distributor  to  recipients.  That included  $13,351 paid to an affiliate of the
Manager. Any unreimbursed  expenses the Distributor incurs with respect to Class
A shares in any fiscal year cannot be recovered in subsequent years.

--------------------------------------------------------------------------------
CLASS B AND CLASS C DISTRIBUTION AND SERVICE PLAN FEES. Under each plan, service
fees and distribution fees are computed on the average of the net asset value of
shares in the  respective  class,  determined  as of the  close of each  regular
business  day during the period.  The Class B and Class C plans  provide for the
Distributor  to  be  compensated  at a  flat  rate,  whether  the  Distributor's
distribution  expenses  are more or less than the amounts paid by the Fund under
the plan during the period for which the fee is paid.

      The Distributor  retains the  asset-based  sales charge on Class B shares.
The Distributor  retains the  asset-based  sales charge on Class C shares during
the first year the shares are  outstanding.  The  asset-based  sales  charges on
Class B and Class C shares  allow  investors  to buy shares  without a front-end
sales charge while  allowing the  Distributor  to  compensate  dealers that sell
those shares.

      The  Distributor's  actual  expenses in selling Class B and Class C shares
may be more than the payments it receives  from the  contingent  deferred  sales
charges collected on redeemed shares and asset-based sales charges from the Fund
under the plans.  If any plan is terminated  by the Fund,  the Board of Trustees
may allow the Fund to continue  payments of the asset-based  sales charge to the
Distributor for  distributing  shares before the plan was terminated.  The plans
allow for the  carry-forward  of  distribution  expenses,  to be recovered  from
asset-based sales charges in subsequent fiscal periods.

Distribution  fees paid to the  Distributor for the six months ended January 31,
2000, were as follows:
<TABLE>
<CAPTION>

                                                                 DISTRIBUTOR'S       DISTRIBUTOR'S
                                                                     AGGREGATE        UNREIMBURSED
                                                                  UNREIMBURSED       EXPENSES AS %
                        TOTAL PAYMENTS     AMOUNT RETAINED            EXPENSES       OF NET ASSETS
                            UNDER PLAN      BY DISTRIBUTOR          UNDER PLAN            OF CLASS
--------------------------------------------------------------------------------------------------
<S>                           <C>                 <C>               <C>                       <C>

Class B Plan                  $616,706            $500,195          $3,637,428                3.32%
Class C Plan                    79,122              33,072             211,983                1.51
</TABLE>



                 27      Oppenheimer California Municipal Fund



<PAGE>





NOTES TO FINANCIAL STATEMENTS Unaudited/ Continued

================================================================================
5. FUTURES CONTRACTS

The Fund may buy and sell futures  contracts in order to gain  exposure to or to
seek to protect  against  changes in  interest  rates.  The Fund may also buy or
write put or call options on these futures contracts.

      The Fund generally sells futures  contracts to hedge against  increases in
interest  rates and the  resulting  negative  effect on the value of fixed  rate
portfolio  securities.  The Fund may also  purchase  futures  contracts  to gain
exposure  to  changes  in  interest  rates as it may be more  efficient  or cost
effective than actually buying fixed income securities.

      Upon  entering  into a futures  contract,  the Fund is required to deposit
either  cash or  securities  (initial  margin)  in an amount  equal to a certain
percentage of the contract value.  Subsequent  payments  (variation  margin) are
made or received by the Fund each day. The variation  margin  payments are equal
to the daily changes in the contract value and are recorded as unrealized  gains
and losses.  The Fund may recognize a realized gain or loss when the contract is
closed or expires.

      Securities  held  in  collateralized  accounts  to  cover  initial  margin
requirements   on  open  futures   contracts  are  noted  in  the  Statement  of
Investments.  The  Statement  of Assets and  Liabilities  reflects a  receivable
and/or payable for the daily mark to market for variation margin.

      Risks of entering into futures contracts (and related options) include the
possibility  that there may be an illiquid market and that a change in the value
of the  contract or option may not  correlate  with  changes in the value of the
underlying securities.

As of January 31, 2000, the Fund had outstanding futures contracts as follows:

<TABLE>
<CAPTION>


                                                                                  UNREALIZED
                            EXPIRATION      NUMBER OF      VALUATION AS OF      APPRECIATION
CONTRACT DESCRIPTION              DATE      CONTRACTS     JANUARY 31, 2000     (DEPRECIATION)
--------------------------------------------------------------------------------------------
<S>                            <C>                <C>          <C>                 <C>
CONTRACTS TO SELL
Municipal Bond                 3/22/00            280          $25,392,500         $ 485,157
U.S. Long Bond                 3/22/00            150           13,832,813          (300,000)
                                                                               -------------
                                                                                    $185,157
                                                                               =============

</TABLE>


================================================================================
6. BANK BORROWINGS

The Fund may borrow from a bank for temporary or emergency  purposes  including,
without limitation,  funding of shareholder  redemptions provided asset coverage
for  borrowings  exceeds  300%.  The Fund has entered  into an  agreement  which
enables it to participate with other  Oppenheimer  funds in an unsecured line of
credit with a bank, which permits  borrowings up to $400 million,  collectively.
Interest is charged to each fund,  based on its  borrowings,  at a rate equal to
the  Federal  Funds Rate plus 0.45%.  Borrowings  are payable 30 days after such
loan is  executed.  The Fund  also pays a  commitment  fee equal to its pro rata
share of the average unutilized amount of the credit facility at a rate of 0.08%
per annum.

      The Fund had no borrowings outstanding during the six months ended January
31, 2000.

                 28      Oppenheimer California Municipal Fund



<PAGE>

<TABLE>
<CAPTION>




OPPENHEIMER CALIFORNIA MUNICIPAL FUND

--------------------------------------------------------------------------------------------------------------------------
<S>                          <C>
OFFICERS AND TRUSTEES        Leon Levy, Chairman of the Board of Trustees
                             Donald W. Spiro, Vice Chairman of the Board of Trustees
                             Bridget A. Macaskill, Trustee and President
                             Robert G. Galli, Trustee
                             Phillip A. Griffiths, Trustee
                             Benjamin Lipstein, Trustee
                             Elizabeth B. Moynihan, Trustee
                             Kenneth A. Randall, Trustee
                             Edward V. Regan, Trustee
                             Russell S. Reynolds, Jr., Trustee
                             Clayton K. Yeutter, Trustee
                             Christian D. Smith, Vice President
                             Andrew J. Donohue, Secretary
                             Brian W. Wixted, Treasurer
                             Robert G. Zack, Assistant Secretary
                             Robert J. Bishop, Assistant Treasurer
                             Scott T. Farrar, Assistant Treasurer

--------------------------------------------------------------------------------------------------------------------------
INVESTMENT ADVISOR           OppenheimerFunds, Inc.

--------------------------------------------------------------------------------------------------------------------------
DISTRIBUTOR                  OppenheimerFunds Distributor, Inc.

--------------------------------------------------------------------------------------------------------------------------
TRANSFER AND SHAREHOLDER     OppenheimerFunds Services
SERVICING AGENT

--------------------------------------------------------------------------------------------------------------------------
CUSTODIAN OF                 Citibank, N.A.
PORTFOLIO SECURITIES

--------------------------------------------------------------------------------------------------------------------------
INDEPENDENT AUDITORS         KPMG LLP

--------------------------------------------------------------------------------------------------------------------------
LEGAL COUNSEL                Mayer, Brown & Platt
</TABLE>

                             The financial  statements included herein have been
                             taken  from  the   records  of  the  Fund   without
                             examination of the independent auditors.

                             This  is a copy  of a  report  to  shareholders  of
                             Oppenheimer  California Municipal Fund. This report
                             must be preceded or  accompanied by a Prospectus of
                             Oppenheimer California Municipal Fund. For material
                             information    concerning   the   Fund,   see   the
                             Prospectus.

                             SHARES OF  OPPENHEIMER  FUNDS ARE NOT  DEPOSITS  OR
                             OBLIGATIONS  OF ANY BANK, ARE NOT GUARANTEED BY ANY
                             BANK,  ARE NOT  INSURED  BY THE  FDIC OR ANY  OTHER
                             AGENCY, AND INVOLVE INVESTMENT RISKS, INCLUDING THE
                             POSSIBLE LOSS OF THE PRINCIPAL AMOUNT INVESTED.

                 29       Oppenheimer California Municipal Fund

<PAGE>



INFORMATION AND SERVICES
--------------------------------------------------------------------------------
As an  Oppenheimer  fund  shareholder,  you can benefit  from  special  services
designed to make  investing  simple.  Whether it's automatic  investment  plans,
timely market updates, or immediate account access, you can count on us whenever
you need assistance. So call us today, or visit our website--we're here to help.


INTERNET
24-hr access to account information and transactions

WWW.OPPENHEIMERFUNDS.COM


GENERAL INFORMATION
Mon-Fri 8:30am-9pm ET, Sat 10am-4pm ET

1.800.525.7048


TELEPHONE TRANSACTIONS
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1.800.852.8457


PHONELINK
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1.800.843.4461

OPPENHEIMERFUNDS  INFORMATION  HOTLINE  24 hours a day,  timely  and  insightful
messages on the economy and issues that may affect your investments

1.800.835.3104



TRANSFER AND SHAREHOLDER SERVICING AGENT
OppenheimerFunds Services
P.O. Box 5270, Denver, CO 80217-5270


                                                         [OPPENHEIMERFUNDS LOGO]

RS0790.001.0100  March 31, 2000


<PAGE>


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

                           Annual Report July 31, 1999

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


                              O P P E N H E I M E R

                                   California
                                 Municipal Fund



                          [Photo of Checkbook Register]



                             [OppenheimerFunds Logo]
                               OppenheimerFunds(R)
                             THE RIGHT WAY TO INVEST
<PAGE>

Report highlights
--------------------------------------------------------------------------------

[Begin: Sidebar Text]

Contents

 3 President's Letter

 5 An Interview
   with Your Fund's
   Manager

10 Fund Performance
----------------------------
14 Financial
   Statements

37 Independent
   Auditors' Report
----------------------------
38 Federal
   Income Tax
   Information

39 Officers and
   Trustees

40 Information and
   Services

[End: Sidebar Text]

o  In stark contrast to U.S. Treasury securities, municipal bond prices were
   remarkably stable throughout the reporting period.

o  Our research-intensive security selection strategy helped us find areas of
   opportunity and helped avoid potential problems.

o  As of July 31, long-term California municipal bonds provided more than 90% of
   the yield of long-term U.S. Treasury securities, making them attractive
   values by historical measures.

Avg Annual Total Returns
For the 1-Year Period
Ended 7/31/99

Class A
Without         With
Sales Chg.(1)   Sales Chg.(2)
-----------------------------
1.59%           -3.24%
-----------------------------

Class B
Without         With
Sales Chg.(1)   Sales Chg.(2)
-----------------------------
0.82%           -4.02%
-----------------------------

Class C
Without         With
Sales Chg.(1)   Sales Chg.(2)
-----------------------------
0.73%           -0.24%
-----------------------------

Total returns include changes in share price and reinvestment of dividends
and capital gains distributions in a hypothetical investment for the periods
shown. In reviewing performance and rankings, please remember that past
performance does not guarantee future results. Investment return and principal
value of an investment in the Fund will fluctuate so that an investor's shares,
when redeemed, may be worth more or less than the original cost. The Fund's
performance may from time to time be subject to substantial short-term changes,
particularly during periods of market or interest rate volatility. For updates
on the Fund's performance, please contact your financial advisor, call us at
1-800-525-7048 or visit our website, www.oppenheimerfunds.com.
1. Includes changes in net asset value per share without deducting any sales
charges.
2. Class A returns include the current maximum initial sales charge of 4.75%.
Class B returns include the applicable contingent deferred sales charge of 5%.
Class C returns include the contingent deferred sales charge of 1%. Class B and
C shares are subject to an annual 0.75% asset-based sales charge. An explanation
of the different performance calculations is in the Fund's prospectus.


                  2   Oppenheimer California Municipal Fund
<PAGE>

Dear shareholder,
--------------------------------------------------------------------------------

[Photo of Bridget A. Macaskill]
Bridget A. Macaskill
President
Oppenheimer
California Municipal Fund

In many ways, the 1999 investment environment has, so far, unfolded as many
expected it would, producing both attractive opportunities and formidable
challenges for investors.
      On the economic front, early worries about the effects of global weakness
in the wake of last year's credit and currency crises have abated. Instead, as
many economies around the world begin to strengthen, concerns now center around
whether the U.S. economy may be growing too quickly. Throughout the year,
consumers in the United States have continued to spend and borrow heavily, more
than offsetting any temporary slowdown in the industrial and export sectors.
      The economy's strength has not gone unnoticed by the nation's monetary
policymakers. In an effort to ward off emerging inflationary pressures, the
Federal Reserve Board increased short-term interest rates this past summer.
      Market reaction to robust economic growth has been mixed. The U.S. bond
market has generally declined, as fixed income investors became increasingly
concerned about the effects of rising interest rates.
      In the stock market, the performance of large-capitalization growth
stocks, which has driven the market's advance over the past few years, has begun
to moderate, and many previously out-of-favor value-oriented, mid-cap and
small-cap stocks have rallied. At the same time, a healthy percentage of
actively managed, diversified portfolios have once again begun to outperform
unmanaged stock indices such as Standard & Poor's 500.

                                                                  (over, please)

                  3   Oppenheimer California Municipal Fund
<PAGE>

At OppenheimerFunds, we applaud the Fed's pre-emptive strike against inflation.
In our view, history has repeatedly demonstrated that most financial assets do
best in a low-inflation environment. What's more, we believe that the move to
higher interest rates should be temporary.
      One recent development is quite troublesome to us however: the increasing
popularity of "day trading" among individuals seeking to make fast money in a
volatile stock market. In our opinion, day trading is not investing, it is
gambling. Experience proves that without extensive research and analysis,
attempting to time short-term price swings is a fool's errand. Instead, we
continue to encourage investors to maintain a long-term perspective that is
measured in years, not days.
      Finally, while we remain alert to the potential impact of the Y2K issue,
we are encouraged by the progress made in addressing the matter. At
OppenheimerFunds, our shareholder accounting systems are already Y2K compliant,
and we have successfully participated in all required industry-wide tests. We
intend to continue re-testing our systems in order to help further protect
against any potential problems. After all, whether in our computer accounting
systems or the financial markets, managing risk is an important part of what
makes OppenheimerFunds The Right Way to Invest.

Sincerely,

/s/ Bridget A. Macaskill

Bridget A. Macaskill
August 20, 1999

                  4   Oppenheimer California Municipal Fund
<PAGE>

An interview with your Fund's manager
--------------------------------------------------------------------------------

[Photo of Portfolio Management Team]
Portfolio Management
Team (l to r)
Bob Patterson
Caryn Halbrecht
(Portfolio Manager)
Jerry Webman

How did Oppenheimer California Municipal Fund perform during the one-year period
that ended July 31, 1999?
We are pleased with the Fund's performance over the fiscal year. We attribute
the Fund's performance to our conservative investment strategy in a rapidly
changing investment environment. In fact, market conditions during the final six
months of 1998 and the first half of 1999 were, in many respects, direct
opposites of each other. The final six months of 1998 were generally
characterized by recessionary economic conditions throughout much of the world,
declining interest rates in the United States and less restrictive monetary
policies worldwide. In contrast, the first half of 1999 saw signs of global
economic recovery, rising domestic interest rates and, ultimately, a tighter
monetary policy in the United States.

How did these economic conditions affect California's municipal bond market?
In stark contrast to U.S. Treasury securities, municipal bond prices were
remarkably stable throughout the one-year reporting period. In the first half of
the period, global economic uncertainty triggered a "flight to quality" among
U.S. and foreign investors. This created unprecedented demand for U.S. Treasury
securities, driving their prices up and their yields down (prices and yields
move in opposite directions). However, because municipal bonds do not provide
tax advantages to foreign investors, municipals did not benefit to the same
extent. As a result, U.S. Treasury securities significantly outperformed
triple-A rated municipal bonds with comparable maturities.

                   5   Oppenheimer California Municpal Fund
<PAGE>

An interview with your Fund's manager
--------------------------------------------------------------------------------

[Begin: Sidebar Text]

"Municpal bonds
endured
significantly
less volatility
than other
high-quality,
fixed income
securities
over the
past year."

[End: Sidebar Text]

In the second half of the reporting period, while municipal bonds remained
stable, prices of U.S. Treasury securities declined sharply, giving back all of
their previous gains. As the economy grew stronger, investors regained their
confidence and sold their Treasury bonds in order to return to riskier financial
assets such as stocks and corporate bonds. Consequently, municipal bonds
provided higher total returns than U.S. Treasuries.
      In our opinion, municipal bonds' relative stability is the result of
supply-and-demand factors. Strong economic conditions in California reduced many
municipalities' need to borrow, leading to a modestly diminished supply of
tax-exempt bonds. Yet, demand remained high from investors seeking to minimize
their income tax liabilities. This supply-and-demand relationship helped support
the stability of California's municipal bond prices and yields.

Did you find compelling values in this market environment?
Yes. Long-term, tax-exempt municipal bond yields have been high relative to
yields of long-term, taxable U.S. Treasury securities. In fact, by mid-1999,
California municipal bond yields were more than 90% of comparable Treasury
yields. As a result, we believe that California municipal bonds have provided
excellent after-tax values compared to historical norms.

                   6   Oppenheimer California Municpal Fund
<PAGE>

[Begin: Sidebar Text]


Avg Annual Total Returns
For the Periods Ended 6/30/991

Class A
1 year  5 year  10 year
-------------------------
-2.96%  5.85%   6.54%
-------------------------

Class B
                Since
1 year  5 year  Inception
-------------------------
-3.65%  5.75%   4.85%
-------------------------

Class C
                Since
1 year  5 year  Inception
-------------------------
0.15%   N/A     5.04%
-------------------------

[End: Sidebar Text]


How did you manage the Fund in this environment?
We attempted to manage the risks of changing interest rates and emphasized those
sectors of the municipal bond market that we expected to benefit most from
prevailing economic and market conditions. This strategy led us to areas of
opportunity that we believe will benefit from California's growing population,
including residential land development and adult living facilities. Residential
land development bonds finance the basic infrastructure for new housing
construction. Adult living facilities are residential housing projects designed
to meet the unique demands of a growing population of aging Americans who want
amenities tailored to their lifestyles.
      Our strategy also led us to avoid certain issuers, such as hospitals,
which have been subject to financial pressures because of an unfavorable
regulatory and legislative environment, including cutbacks in Medicaid and
Medicare. We also tended to avoid bonds issued by utilities that are in the
midst of industry-wide deregulation.

1. Total returns include changes in share price and reinvestment of dividends
and capital gains distributions in a hypothetical investment for the periods
shown. Class A returns include the current maximum initial sales charge of
4.75%. Class A shares were first publicly offered on 11/3/88. Class B returns
include the applicable contingent deferred sales charge of 5% (1-year) and 1%
(since inception on 5/3/93). Class C returns for the one-year result include the
contingent deferred sales charge of 1%. Class C shares have an inception date of
11/1/95. Class B and C shares are subject to an annual 0.75% asset-based sales
charge. An explanation of the different performance calculations is in the
Fund's prospectus.



                  7   Oppenheimer California Municipal Fund
<PAGE>

An interview with your Fund's manager
--------------------------------------------------------------------------------

[Begin: Sidebar Text]

Standardized Yields(2)
For the 30 Days Ended 7/31/99
------------------------------
Class A                  4.44%
------------------------------
Class B                  3.90
------------------------------
Class C                  3.90
------------------------------

[End: Sidebar Text]


Throughout the reporting period, we mostly targeted a neutral average
duration--which is a measure of sensitivity to changes in interest rates. When
interest rates declined in 1998, our neutral position constrained performance
slightly compared to portfolios with longer durations. However, when interest
rates rose in 1999, our neutral position helped shelter the portfolio from some
of the impact affecting investors who had previously adopted a longer, more
aggressive duration strategy.

What is your outlook for the municipal bond market and the Fund?
We remain cautiously optimistic. First, we believe that municipal bonds are
attractively valued relative to comparable taxable securities, and should
benefit as that relationship returns to more normal levels. Second, California
has benefited greatly from the recent strength of the U.S. economy, which has
enabled many of its municipalities to put their fiscal houses in good order.
This should help reduce the risk of credit downgrades.







2. Standardized yield is based on net investment income for the 30-day period
ended July 31, 1999. Falling share prices will tend to artificially raise
yields.

                  8   Oppenheimer California Municipal Fund
<PAGE>

[Begin: Sidebar Text]
[Begin: Tabular Representation of Pie Chart]

Credit Allocation(3)

AAA             44.9%
AA               8.7
A               11.1
BBB             28.2
BB               6.3
B                0.8

[End: Tabular Representation of Pie Chart]
[End: Sidebar Text]

On the other hand, we remain concerned about rising interest rates. Accordingly,
we intend to continue to monitor the economic environment carefully. If the
economy continues to grow at an unsustainable rate, we may position the
portfolio to reduce the adverse effects of potentially higher interest rates. We
believe that these credit-conscious, risk management strategies make Oppenheimer
California Municipal Fund an important part of The Right Way to Invest.

Top 5 Industries
(Percentage of invested assets)(4)
---------------------------------------------------------
Special Assessment                                  26.2%
---------------------------------------------------------
Single-Family Housing                               12.0
---------------------------------------------------------
Municipal Leases                                     9.3
---------------------------------------------------------
Highways                                             9.2
---------------------------------------------------------
Hospital/Healthcare                                  7.9
---------------------------------------------------------



3. Portfolio data are as of July 31, 1999, are dollar-weighted based on invested
assets and are subject to change. The Fund may invest up to 25% of its assets in
below-investment-grade securities which carry greater risk of default. Average
credit quality and ratings allocations include securities rated by national
ratings organizations as well as unrated securities (currently 14.2% of total
investments) which have ratings assigned by the Manager in categories equivalent
to those of ratings organizations.
4. Industry weightings are as of July 31, 1999, and are subject to change.



                  9  Oppenheimer California Municipal Fund
<PAGE>

Fund performance
--------------------------------------------------------------------------------

How Has the Fund Performed? Below is a discussion, by the Manager, of the Fund's
performance during its fiscal year ended July 31, 1999, followed by a graphical
comparison of the Fund's performance to an appropriate broad-based market index.
      [square bullet] Management's Discussion of Performance.
During the Fund's fiscal year that ended July 31, 1999, Oppenheimer California
Municipal Fund performed relatively well, despite the fact that the overall bond
market weakened considerably in 1999. The weakness in the bond market stemmed
from signs of continuing strong economic growth, which could cause inflation to
reemerge. However, the Fund benefited from a reduced supply of new tax-exempt
bond issues relative to robust demand from investors seeking to manage their
income tax liabilities. This reduction in issuance was primarily a result of
strong economic conditions throughout the United States, which helped curtail
California's need to borrow. In this environment, the Fund continued to adhere
to its long-standing strategy of holding a diversified portfolio of municipal
bonds selected after extensive research into their issuers' credit quality. The
Fund's portfolio holdings, allocations and strategies are subject to change.



                  10   Oppenheimer California Municipal Fund
<PAGE>

      [square bullet] Comparing the Fund's Performance to the Market. The graphs
that follow show the performance of a hypothetical $10,000 investment in each
class of shares of the Fund held from the inception of the class until July 31,
1999. In the case of Class A shares, performance is measured over a ten-year
period. In the case of Class B shares, performance is measured from the
inception of the class on May 3, 1993, and in the case of Class C shares, from
the inception of the class on November 1, 1995. The Fund's performance reflects
the deduction of the maximum initial sales charge on Class A shares and the
applicable contingent deferred sales charge for Class B and Class C shares. The
graphs assume that all dividends and capital gains distributions were reinvested
in additional shares.
      Because the Fund invests in a variety of Municipal Securities, the Fund's
performance is compared to that of the Lehman Brothers Municipal Bond Index, an
unmanaged index of a broad range of investment grade municipal bonds that is
widely regarded as a measure of the performance of the general municipal bond
market. Index performance reflects the reinvestment of income but does not
consider the effect of capital gains or transaction costs, and none of the data
below shows the effect of taxes. Also, the Fund's performance reflects the
effect of Fund business and operating expenses. While index comparisons may be
useful to provide a benchmark for the Fund's performance, it must be noted that
the Fund's investments are not limited to the securities in any one index.

                  11   Oppenheimer California Municipal Fund
<PAGE>

Fund performance
--------------------------------------------------------------------------------

Class A Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class A) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]


              Oppenheimer California      Lehman Brothers Municipal
              Municipal Fund Class A      Bond Index
11.3.88        9525                       10000
12.31.88       9661                       10010
12.31.89      10783                       11090
12.31.90      11470                       11898
12.31.91      12724                       13343
12.31.92      13777                       14519
12.31.93      15604                       16302
12.31.94      14279                       15460
12.31.95      17100                       18158
7.31.96(1)    17158                       18241
7.31.97       19063                       20111
7.31.98       20142                       21316
7.31.99       20463                       21929

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class AShares of the Fund at 7/31/99(2)
1 Year  -3.24%        5 Year  5.42%         10 Year  6.40%



Class B Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class B) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]

              Oppenheimer California      Lehman Brothers Municipal
              Municipal Fund Class B      Bond Index
5.3.93        10000                       10000
12.31.93      10656                       10718
12.31.94       9656                       10164
12.31.95      11486                       11938
7.31.96(1)    11474                       11993
7.31.97       12651                       13222
7.31.98       13267                       14015
7.31.99       13375                       14418

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class BShares of the Fund at 7/31/99(3)
1 Year  -4.02%        5 Year  5.32%         Life  4.77%

                  12   Oppenheimer California Municipal Fund
<PAGE>

Class C Shares

Comparison of Change in Value of $10,000 Hypothetical Investments in:
Oppenheimer California Municipal Fund (Class C) and Lehman Brothers Municipal
Bond Index

[Begin: Tablular Representation of Line Chart]

              Oppenheimer California      Lehman Brothers Municipal
              Municipal Fund Class C      Bond Index
11.1.95       10000                       10000
12.31.95      10290                       10264
7.31.96(1)    10271                       10310
7.31.97       11324                       11367
7.31.98       11876                       12049
7.31.99       11963                       12395

[End: Tablular Representation of Line Chart]

Average Annual Total Return of Class CShares of the Fund at 7/31/99(4)
1 Year  -0.24%        Life  4.90%

Total returns and the ending account values in the graphs show change in share
value and include reinvestment of all dividends and capital gains distributions.
The performance information for the Lehman Brothers Municipal Bond Index in the
graphs begins on 10/31/88 for Class A, 4/30/93 for Class B and 10/31/95 for
Class C.
1. The Fund changed its fiscal year-end from December 31 to July 31.
2. The average annual total returns are shown net of the applicable 4.75%
maximum initial sales charge.
3. Class B shares of the Fund were first publicly offered on 5/3/93. The average
annual total returns are shown net of the applicable 5% (1-year) and 1% (since
inception) contingent deferred sales charges. The ending account value in the
graph is net of the applicable 1% contingent deferred sales charge.
4. Class C shares of the Fund were first publicly offered on 11/1/95. The 1-year
period is shown net of the applicable 1% contingent deferred sales charge.
Past performance is not predictive of future performance. Graphs are not drawn
to the same scale.



                  13   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  July 31, 1999
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face          Market Value
                                                     (Unaudited)     Amount        See Note 1
==============================================================================================
Municipal Bonds and Notes--99.6%
----------------------------------------------------------------------------------------------
California--94.8%
<S>                                                  <C>             <C>           <C>
Anaheim, CA PFAU Lease RB, Public
Improvements Project, Sub. Lien, Series C,
FSA Insured, Zero Coupon, 5.27%, 9/1/20(1)           Aaa/AAA/AAA     $17,630,000   $ 5,450,843
----------------------------------------------------------------------------------------------
Anaheim, CA PFAU TXAL RB, MBIA Insured,
Inverse Floater, 12.30%, 12/28/18(2)                 Aaa/AAA           3,000,000     3,615,000
----------------------------------------------------------------------------------------------
Berkeley, CA HF RRB, Alta Bates Medical Center,
Prerefunded, Series A, 6.50%, 12/1/11                A2/NR             4,500,000     4,849,785
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, American
Baptist Homes, Series A, 6.20%, 10/1/27              NR/BBB            6,000,000     6,223,860
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, Episcopal
Homes Foundation, 5.125%, 7/1/18                     NR/A-             5,900,000     5,539,274
----------------------------------------------------------------------------------------------
CA Assn. of Bay Area Governments FAU for
Non-profit Corps. Refunding COP, Rhonda Haas
Goldman Plaza, 5.125%, 5/15/23                       NR/A+             2,300,000     2,147,119
----------------------------------------------------------------------------------------------
CA CDAU Lease RB, United Airlines,
Series A, 5.70%, 10/1/33                             Baa3/BB+          9,185,000     9,143,025
----------------------------------------------------------------------------------------------
CA Community College FAU Lease RB,
West Valley Mission Community College,
MBIA Insured, 5.625%, 5/1/22                         Aaa/AAA           3,585,000     3,630,279
----------------------------------------------------------------------------------------------
CA Educational FA RRB, Los Angeles
College Chiropractic, 5.60%, 11/1/17                 Baa2/NR           1,000,000       994,820
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RB, Sr. Lien, Prerefunded, Series A, 6.50%, 1/1/32   Baa3/BBB-/BBB     4,600,000     5,144,410
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RRB, Zero Coupon, 5.98%, 1/15/21(1)(3)               Baa3/BBB-/BBB     7,500,000     2,080,875
----------------------------------------------------------------------------------------------
CA Foothill/Eastern Corridor Agency Toll Road
RRB, Zero Coupon, 6%, 1/15/22(1)(3)                  Baa3/BBB-/BBB     7,500,000     1,957,650
----------------------------------------------------------------------------------------------
CA GOB, 5%, 10/1/27                                  Aa3/A+/AA-        2,000,000     1,861,520
----------------------------------------------------------------------------------------------
CA GOB, MBIA Insured, 5%, 8/1/24                     Aaa/AAA/AAA       6,000,000     5,622,060
----------------------------------------------------------------------------------------------
CA HFA RB, Series A, 7.35%, 8/1/11                   Aa2/AA-              75,000        78,302
----------------------------------------------------------------------------------------------
CA HFA RB, Series C, 7.60%, 8/1/30                   Aa2/AA-             940,000       957,913
----------------------------------------------------------------------------------------------
CA HFA RB, Series E-1, 6.45%, 2/1/12                 Aa2/AA-             750,000       790,492
----------------------------------------------------------------------------------------------
CA HFA RB, Series M, MBIA Insured,
5.60%, 8/1/29                                        Aaa/AAA           2,500,000     2,496,375
----------------------------------------------------------------------------------------------
CA HFA SFM RB, Series 83, Inverse
Floater, 9.045%, 8/1/25(2)                           NR/AAA            4,000,000     4,401,600
----------------------------------------------------------------------------------------------
CA HFA SFM RB, Series C, 6.75%, 2/1/25               Aa2/AA-           9,730,000    10,232,944

</TABLE>


                  14   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face          Market Value
                                                     (Unaudited)      Amount        See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>           <C>
CA HFFAU RB, Los Angeles Children's Hospital,
Prerefunded, Series A, 7.125%, 6/1/21                Aaa/NR           $1,000,000    $1,076,060
----------------------------------------------------------------------------------------------
CA HFFAU RRB, Kaiser Permanente,
Series B, 5%, 10/1/18                                A3/A              3,500,000     3,241,245
----------------------------------------------------------------------------------------------
CA Infrastructure & ED Bank RB, American
Center for Wine, Food & Arts, 5.75%, 12/1/24         NR/A /A           5,000,000     4,969,850
----------------------------------------------------------------------------------------------
CA Intermodal Container Transfer Facility Joint
PAU RRB, Southern Pacific Transportation Co.,
Series A, 7.70%, 11/1/14                             A3/A-             1,000,000     1,027,910
----------------------------------------------------------------------------------------------
CA PCFAU SWD RRB, North Cnty. Recycling
Center, Escrowed to Maturity, Series A,
6.75%, 7/1/11                                        Aaa/NR              500,000       544,340
----------------------------------------------------------------------------------------------
CA PWBL RB, State Prison Department of
Corrections, Series E, FSA Insured, 5.50%, 6/1/15    Aaa/AAA/AAA       3,000,000     3,127,410
----------------------------------------------------------------------------------------------
CA Rural Home Mtg. FAU SFM RB, Mtg.-Backed
Securities Program, Series B-5, 6.35%, 12/1/29       NR/AAA            3,080,000     3,290,826
----------------------------------------------------------------------------------------------
CA Saddleback Community College District
Refunding COP, BIG Insured, 7%, 8/1/19               Aaa/AAA           1,000,000     1,020,100
----------------------------------------------------------------------------------------------
CA SCDAU COP, Children's Hospital-Los Angeles,
5.25%, 8/15/29                                       A1/A+             5,000,000     4,701,950
----------------------------------------------------------------------------------------------
CA SCDAU COP, The Internext Group,
5.375%, 4/1/17                                       NR/BBB            5,500,000     5,231,600
----------------------------------------------------------------------------------------------
CA SCDAU COP, The Internext Group,
5.375%, 4/1/30                                       NR/BBB            8,500,000     7,847,455
----------------------------------------------------------------------------------------------
CA SCDAU Revenue Refunding COP,
Inverse Floater, 7.575%, 11/1/15(2)                  A1/NR             6,600,000     6,327,750
----------------------------------------------------------------------------------------------
Campbell, CA Refunding COP, Civic Center
Project, Prerefunded Balance, 6.75%, 10/1/17         A /A              1,130,000     1,218,061
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Bonds,
Ladera No. 98-2, 5.70%, 9/1/20                       NR/NR             5,000,000     4,844,800
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Bonds,
Prerefunded, No. 92-1, 7.10%, 9/1/21                 NR/NR             3,250,000     3,838,575
----------------------------------------------------------------------------------------------
Capistrano, CA USD CFD SPTX Refunding
Bonds, Las Flores No. 92-1, MBIA Insured,
5%, 9/1/23                                           Aaa/AAA/AAA       1,000,000       938,090
----------------------------------------------------------------------------------------------
Central CA Joint Powers Health FAU COP,
Community Hospitals of Central California
Project, 5%, 2/1/23                                  Baa1/NR           5,090,000     4,601,258
----------------------------------------------------------------------------------------------
Clovis, CA USD CAP GOB, Series D, FGIC Insured,
Zero Coupon, 5.60%, 8/1/10(1)                        Aaa/AAA           2,000,000     1,154,120
----------------------------------------------------------------------------------------------
Colton, CA PFAU TXAL RRB, Redevelopment
Projects, Series B, 5.875%, 8/1/27                   NR/NR             3,700,000     3,575,421

</TABLE>


                  15   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face          Market Value
                                                     (Unaudited)      Amount        See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>           <C>
Commerce, CA Community Development
Commission TXAL Refunding Bonds,
Redevelopment Project No. 1, Sub. Lien,
Series B, 5.75%, 8/1/10                              NR/NR            $  815,000    $  820,542
----------------------------------------------------------------------------------------------
Commerce, CA Community Development
Commission TXAL Refunding Bonds,
Redevelopment Project No. 1, Sub. Lien,
Series B, 6%, 8/1/21                                 NR/NR             2,800,000     2,789,836
----------------------------------------------------------------------------------------------
Commerce, CA Joint Powers FAU Lease RB,
Community Center, Series A, 6.25%, 10/1/22           Baa2/NR           1,410,000     1,462,198
----------------------------------------------------------------------------------------------
Compton, CA Refunding COP, Civic Center &
Capital Improvements, Series A, 5.50%, 9/1/15        NR/BBB            3,000,000     2,938,740
----------------------------------------------------------------------------------------------
Davis, CA Public Facilities FAU Local Agency
RRB, Mace Ranch Area, Series A, 6.60%, 9/1/25        NR/NR             5,000,000     5,182,100
----------------------------------------------------------------------------------------------
Delta Cnty., CA Home Mtg. FAU SFM RB,
Series A, 5.35%, 6/1/24                              Aaa/AAA/AAA       4,605,000     4,475,231
----------------------------------------------------------------------------------------------
Duarte, CA COP, City of Hope National
Medical Center, 6.25%, 4/1/23                        Baa1/AAA          4,500,000     4,902,930
----------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA
Insured, Zero Coupon, 6.20%, 11/1/18(1)              Aaa/AAA           6,000,000     2,089,320
----------------------------------------------------------------------------------------------
Escondido, CA Union High SDI CAP GOB, MBIA
Insured, Zero Coupon, 6.20%, 11/1/19(1)              Aaa/AAA           2,000,000       654,140
----------------------------------------------------------------------------------------------
Fontana, CA RA TXAL Refunding Bonds,
Jurupa Hills Redevelopment Project,
Series A, 5.50%, 10/1/19                             NR/BBB+           1,345,000     1,310,528
----------------------------------------------------------------------------------------------
Fontana, CA RA TXAL Refunding Bonds,
Jurupa Hills Redevelopment Project,
Series A, 5.50%, 10/1/27                             NR/BBB+           6,040,000     5,842,311
----------------------------------------------------------------------------------------------
Huntington Park, CA PFAU Lease RRB,
Wastewater System Project, Series A,
6.20%, 10/1/25                                       NR/NR             3,000,000     3,014,490
----------------------------------------------------------------------------------------------
Industry, CA Improvement Bond Act of 1915
SPAST GOB, Prerefunded, District No. 91-1,
7.65%, 9/2/21                                        NR/NR             1,750,000     1,952,352
----------------------------------------------------------------------------------------------
Irvine, CA Improvement Bond Act of 1915
SPAST GOB, District 94-13-Group One,
5.50%, 9/22/22                                       NR/NR             2,500,000     2,365,600
----------------------------------------------------------------------------------------------
Laguna Salada, CA USD CAP GOB, Series B,
FGIC Insured, Zero Coupon, 5.30%, 8/1/22(1)          Aaa/AAA/AAA       3,035,000       845,490
----------------------------------------------------------------------------------------------
Lake Elsinore, CA PFAU TXAL Bonds,
Series A, 5.50%, 9/1/30                              NR/BBB            5,000,000     4,699,450

</TABLE>

                  16   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face          Market Value
                                                     (Unaudited)      Amount        See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>              <C>           <C>
Lake Elsinore, CA School FAU SPTX RRB,
Horsethief Canyon, 5.625%, 9/1/16                    NR/NR            $4,760,000    $4,580,405
----------------------------------------------------------------------------------------------
Long Beach, CA Water RRB, Series A,
MBIA Insured, 5%, 5/1/24                             Aaa/AAA           7,090,000     6,644,961
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 5.58%, 3/1/12(1)               Baa1/BBB/A-       1,700,000       842,622
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 6.92%, 9/1/10(1)               Baa1/BBB/A-       5,960,000     3,278,358
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 6.95%, 9/1/11(1)               Baa1/BBB/A-       2,900,000     1,492,021
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 7.03%, 9/1/13(1)               Baa1/BBB/A-       4,500,000     2,034,675
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA CAP COP, Disney Parking
Project, Zero Coupon, 5.16%, 9/1/14(1)               Baa1/BBB/A-       7,260,000     3,080,128
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RRB, First
Tier-Property A, Series A, FSA Insured, 5%, 7/1/15   Aaa/AAA/AAA       5,000,000     4,879,200
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RRB,
Series A, FSA Insured, 5%, 7/1/14                    Aaa/AAA/AAA       5,000,000     4,919,800
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Public Works FAU Lease
RB, Multiple Capital Facilities Project V,
Series A, AMBAC Insured, 5.125%, 6/1/17              Aaa/AAA           1,965,000     1,922,163
----------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Public Works FAU RRB,
Regional Park & Open Space District,
Series A, 5%, 10/1/16(4)                             Aa3/AA            7,600,000     7,356,952
----------------------------------------------------------------------------------------------
Los Angeles, CA Harbor Department RB,
Series B, 5.375%, 11/1/23                            Aa3/AA/AA         5,000,000     4,841,600
----------------------------------------------------------------------------------------------
Los Angeles, CA USD GOB, Series B,
FGIC Insured, 5%, 7/1/23                             Aaa/AAA/AAA       5,000,000     4,691,500
----------------------------------------------------------------------------------------------
Oakland, CA RA TXAL Refunding Bonds,
MBIA Insured, 5.95%, 9/1/19(5)                       Aaa/AAA           8,600,000     9,040,578
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 86-2 SPTX
Refunding Bonds, Rancho Santa Margarita,
Series A, 5.55%, 8/15/17                             NR/NR             1,000,000       974,410
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
Aliso Viejo, Prerefunded, Series A, 7.10%, 8/15/05   NR/AAA            1,440,000     1,594,915
----------------------------------------------------------------------------------------------
Orange Cnty., CA CFD No. 88-1 SPTX Bonds,
Aliso Viejo, Prerefunded, Series A, 7.35%, 8/15/18   NR/AAA            7,000,000     7,802,760
----------------------------------------------------------------------------------------------
Orange Cnty., CA Improvement Bond Act of
1915 RRB, Irvine Coast Assessment District,
No. 88-1-A, 5.50%, 9/2/16                            NR/NR             3,000,000     2,973,630

</TABLE>


                  17   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face          Market Value
                                                     (Unaudited)     Amount        See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>           <C>
Orange Cnty., CA Improvement Bond Act of
1915 SPAST GOB, Assessment No. 88-1,
6.25%, 9/2/18                                        NR/NR           $ 2,300,000   $ 2,326,404
----------------------------------------------------------------------------------------------
Palm Springs, CA COP, Escrowed to Maturity,
Sub. Lien, Series B, Zero Coupon,
5.54%, 4/15/21(1)                                    NR/AAA           15,000,000     4,520,700
----------------------------------------------------------------------------------------------
Pittsburg, CA RA TXAL Refunding Bonds,
Los Medanos Community Development
Project, Sub. Lien, 6.20%, 8/1/19                    NR/BBB            2,500,000     2,630,325
----------------------------------------------------------------------------------------------
Placentia, CA PFAU SPTX RB, Jr. Lien,
Series B, 6.60%, 9/1/15                              NR/NR             1,600,000     1,641,776
----------------------------------------------------------------------------------------------
Pomona, CA SFM RRB, Escrowed to Maturity,
Series A, 7.60%, 5/1/23                              Aaa/AAA           4,500,000     5,644,350
----------------------------------------------------------------------------------------------
Pomona, CA SFM RRB, Escrowed to Maturity,
Series B, 7.50%, 8/1/23                              Aaa/AAA             500,000       625,050
----------------------------------------------------------------------------------------------
Pomona, CA USD GORB, Series A, MBIA
Insured, 6.15%, 8/1/15                               Aaa/AAA           2,000,000     2,190,760
----------------------------------------------------------------------------------------------
Port Oakland, CA Port RB, Series G, MBIA
Insured, 5.375%, 11/1/25                             Aaa/AAA/AAA      10,650,000    10,371,502
----------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
FGIC Insured, Inverse Floater, 7.97%, 6/1/19(2)      Aaa/AAA/AAA       4,000,000     4,135,000
----------------------------------------------------------------------------------------------
Redding, CA Electric System Revenue COP,
MBIA Insured, Inverse Floater, 9.339%, 7/8/22(2)     Aaa/AAA           2,500,000     3,040,625
----------------------------------------------------------------------------------------------
Richmond, CA Improvement Bond Act of 1915
GORB, Reassessment District No. 855,
6.60%, 9/2/19                                        NR/NR             1,500,000     1,545,450
----------------------------------------------------------------------------------------------
Riverside Cnty., CA CFD No. 88-12 SPTX Bonds,
Prerefunded, 7.55%, 9/1/17                           NR/NR             3,000,000     3,186,150
----------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU Refunding COP,
5.75%, 5/15/19                                       NR/BBB-           2,100,000     2,079,735
----------------------------------------------------------------------------------------------
Riverside Cnty., CA PFAU TXAL RRB,
Redevelopment Projects, Series A,
5.625%, 10/1/33                                      Baa2/BBB-         6,600,000     6,491,166
----------------------------------------------------------------------------------------------
Riverside Cnty., CA Refunding COP, Air Force
Village West, Inc., Series A, 8.125%, 6/15/12        NR/NR             3,000,000     3,367,320
----------------------------------------------------------------------------------------------
Riverside Cnty., CA Refunding COP, Air Force
Village West, Inc., Series A, 8.125%, 6/15/20        NR/NR             3,000,000     3,367,320
----------------------------------------------------------------------------------------------
Riverside Cnty., CA SFM RB, Escrowed to
Maturity, Series A, 7.80%, 5/1/21                    Aaa/AAA           4,285,000     5,546,675
----------------------------------------------------------------------------------------------
Sacramento Cnty., CA SFM RB, Escrowed to
Maturity, 8%, 7/1/16(4)                              Aaa/AAA          10,000,000    12,944,900

</TABLE>

                  18   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face           Market Value
                                                     (Unaudited)     Amount         See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>            <C>
Sacramento Cnty., CA SPTX Refunding Bonds,
CFD No. 1, 5.70%, 12/1/20                            NR/NR           $ 2,000,000    $1,938,420
----------------------------------------------------------------------------------------------
Sacramento, CA Cogeneration Authority RB,
Procter & Gamble Project, 6.50%, 7/1/14              NR/BBB-/NR        5,000,000     5,631,600
----------------------------------------------------------------------------------------------
Sacramento, CA MUD Electric RRB, FGIC
Insured, Inverse Floater, 9.325%, 8/15/18(2)         Aaa/AAA/AAA       5,500,000     6,235,625
----------------------------------------------------------------------------------------------
Sacramento, CA PAU RB, Cogeneration
Project, 6%, 7/1/22                                  NR/BBB-           7,300,000     7,453,592
----------------------------------------------------------------------------------------------
San Bernardino Cnty., CA COP, Medical
Center Financing Project, MBIA Insured,
5.50%, 8/1/17                                        Aaa/AAA           5,250,000     5,404,717
----------------------------------------------------------------------------------------------
San Diego Cnty., CA COP, MBIA Insured,
Inverse Floater, 8.896%, 11/18/19(2)                 A1/A              2,000,000     2,202,500
----------------------------------------------------------------------------------------------
San Diego Cnty., CA Water Authority Revenue
COP, Prerefunded, Series 91-B, MBIA Insured,
Inverse Floater, 9.12%, 4/8/21(2)                    Aaa/AAA           3,000,000     3,630,000
----------------------------------------------------------------------------------------------
San Diego, CA Convention Center Expansion
FAU Lease RB, Series A, 5.25%, 4/1/16                Aaa/AAA/AAA       3,000,000     2,984,940
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Issue 22, AMBAC
Insured, 5%, 5/1/19                                  Aaa/AAA/AAA         235,000       220,797
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. International
Airport Commission RB, Series 84, AMBAC
Insured, Inverse Floater, 6.145%, 5/1/19(2)          NR/AAA            4,750,000     4,175,820
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C,
Zero Coupon, 5.10%, 8/1/11(1)                        A2/A              2,350,000     1,218,875
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C, Zero
Coupon, 5.15%, 8/1/12(1)                             A2/A              2,350,000     1,142,382
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, CAP
Redevelopment Projects, Series C, Zero
Coupon, 5.25%, 8/1/14(1)                             A2/A              2,350,000     1,006,129
----------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty. Redevelopment
FAU TXAL Refunding Bonds, Series C, Zero
Coupon, 5%, 8/1/10(1)                                A2/A              2,350,000     1,302,652
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road CAP RRB, Series A,
0%/5.75%, 1/15/21(6)                                 Baa3/BBB-/BBB    11,800,000     7,620,558

</TABLE>

                  19   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch       Face         Market Value
                                                     (Unaudited)     Amount       See Note 1
----------------------------------------------------------------------------------------------
California  (continued)
<S>                                                  <C>             <C>          <C>
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road CAP RRB, Series A, MBIA
Insured, Zero Coupon, 5.73%, 1/15/25(1)              Aaa/AAA/AAA     $18,250,000  $  4,386,570
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road RB, Sr. Lien, 5%, 1/1/33            Baa3/BBB-/BBB     8,000,000     7,161,920
----------------------------------------------------------------------------------------------
San Joaquin Hills, CA Transportation Corridor
Agency Toll Road RB, Sr. Lien, Prerefunded,
6.75%, 1/1/32                                        Aaa/AAA/AAA       7,000,000     7,718,480
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Inner-City Commuter,
Series C, 5.60%, 9/1/19                              NR/BBB            3,060,000     2,959,601
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Mainplace Project,
Series D, 5.50%, 9/1/15                              NR/NR             1,000,000       953,760
----------------------------------------------------------------------------------------------
Santa Ana, CA FAU RRB, Mainplace Project,
Series D, 5.60%, 9/1/19                              NR/NR             1,000,000       950,250
----------------------------------------------------------------------------------------------
Santa Margarita/Dana Point, CA Authority RB,
Improvement Districts 3-3A-4-4A, Series B,
MBIA Insured, 7.25%, 8/1/14                          Aaa/AAA             680,000       833,864
----------------------------------------------------------------------------------------------
Southern CA Home FAU SFM RB,
Series A, 7.35%, 9/1/24                              NR/AAA            1,340,000     1,393,761
----------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District
Waterworks RB, Inverse Floater,
7.419%, 10/30/20(2)                                  Aa2/AA            3,300,000     3,291,750
----------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District
Waterworks RRB, Series A, 4.75%, 7/1/22              Aa2/AA           10,000,000     9,011,100
----------------------------------------------------------------------------------------------
Southern CA PPAU Transmission Project RB,
Inverse Floater, 7.615%, 7/1/12(2)                   Aa3/A+            1,900,000     2,101,875
----------------------------------------------------------------------------------------------
Stockton, CA CFD No. 90-2 SPTX RRB,
Brookside Estates, 6.20%, 8/1/15                     NR/NR             1,750,000     1,780,870
----------------------------------------------------------------------------------------------
Temecula, CA CFD No. 88-12-A SPTX
Refunding Bonds, 5.625%, 9/1/17                      NR/NR             2,175,000     2,125,454
----------------------------------------------------------------------------------------------
Tustin, CA USD CFD No. 88-1 SPTX RB,
Prerefunded, Series B, 6.375%, 9/1/21                NR/NR             3,500,000     3,978,520
----------------------------------------------------------------------------------------------
University of CA Regents RB, Multiple Purpose
Projects, Prerefunded, Series A, 6.875%, 9/1/16      NR/AAA            1,950,000     2,149,388
----------------------------------------------------------------------------------------------
West Sacramento, CA Improvement Bond Act of
1915 SPAST Refunding Bonds, 5.60%, 9/2/17            NR/NR             2,000,000     1,938,020
----------------------------------------------------------------------------------------------
Yuba City, CA USD Refunding COP,
Series A, 5%, 2/1/17                                 Aaa/AAA           3,010,000     2,909,496
                                                                                  ------------
                                                                                   441,559,397
</TABLE>



                  20   Oppenheimer California Municipal Fund
<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                     Ratings:
                                                     Moody's/
                                                     S&P/Fitch        Face        Market Value
                                                     (Unaudited)      Amount      See Note 1
----------------------------------------------------------------------------------------------
U.S. Possessions--4.8%
<S>                                                  <C>              <C>         <C>
Guam PAU RB, Series A, 6.625%, 10/1/14               NR/BBB           $2,000,000  $  2,241,980
----------------------------------------------------------------------------------------------
PR CMWLTH GORB, MBIA Insured,
Inverse Floater, 7.794%, 7/1/08(2)                   Aaa/AAA           3,500,000     3,815,000
----------------------------------------------------------------------------------------------
PR CMWLTH HTAU RRB, Series A,
AMBAC Insured, 5.50%, 7/1/13                         Aaa/AAA/AAA       3,000,000     3,144,390
----------------------------------------------------------------------------------------------
PR CMWLTH HTAU RRB, Series A,
AMBAC Insured, 5.50%, 7/1/14                         Aaa/AAA/AAA       3,500,000     3,657,920
----------------------------------------------------------------------------------------------
PR EPAU RB, Prerefunded, Series P, 7%, 7/1/21        Baa1/BBB+         4,000,000     4,305,560
----------------------------------------------------------------------------------------------
PR HFA SFM RB, Affordable Housing Mtg
Portfolio I, 6.25%, 4/1/29                           Aaa/AAA           2,440,000     2,531,256
----------------------------------------------------------------------------------------------
PR Housing Finance Corp. SFM RB, Portfolio 1,
Series B, 7.65%, 10/15/22                            Aaa/AAA             275,000       286,209
----------------------------------------------------------------------------------------------
PR Industrial, Medical & Environmental
PC Facilities Tourist RB, Mennonite General
Hospital Project, Series A, 6.50%, 7/1/12            NR/BBB-/BBB       2,350,000     2,468,157
                                                                                  ------------
                                                                                    22,450,472

----------------------------------------------------------------------------------------------
Total Investments, at Value (Cost $451,843,264)                             99.6%  464,009,869
----------------------------------------------------------------------------------------------
Other Assets Net of Liabilities                                              0.4     1,979,775
                                                                       ---------  ------------
Net Assets                                                                 100.0% $465,989,644
                                                                       =========  ============
</TABLE>

<TABLE>
<CAPTION>

To simplify the listings of securities, abbreviations are used per the table
below:
<S>                                                <C>

CAP    -- Capital Appreciation                     PAU   -- Power Authority
CDAU   -- Communities Development Authority        PC    -- Pollution Control
CFD    -- Community Facilities District            PCFAU -- Pollution Control Finance Authority
CMWLTH -- Commonwealth                             PFAU  -- Public Finance Authority
COP    -- Certificates of Participation            PPAU  -- Public Power Authority
ED     -- Economic Development                     PWBL  -- Public Works Board Lease
EPAU   -- Electric Power Authority                 RA    -- Redevelopment Agency
FA     -- Facilities Authority                     RB    -- Revenue Bonds
FAU    -- Finance Authority                        RRB   -- Revenue Refunding Bonds
GOB    -- General Obligation Bonds                 SCDAU -- Statewide Communities Development Authority
GORB   -- General Obligation Refunding Bonds       SDI   -- School District
HF     -- Health Facilities                        SFM   -- Single Family Mortgage
HFA    -- Housing Finance Agency                   SPAST -- Special Assessment
HFFAU  -- Health Facilities Finance Authority      SPTX  -- Special Tax
HTAU   -- Highway & Transportation Authority       SWD   -- Solid Waste Disposal
MTAU   -- Metropolitan Transportation Authority    TXAL  -- Tax Allocation
MUD    -- Municipal Utility District               USD   -- Unified School District
</TABLE>


                  21   Oppenheimer California Municipal Fund
<PAGE>
--------------------------------------------------------------------------------
Statement of Investments  (Continued)
--------------------------------------------------------------------------------


--------------------------------------------------------------------------------
1. For zero coupon bonds, the interest rate shown is the effective yield on the
date of purchase.
2. Represents the current interest rate for a variable rate bond known as an
"inverse floaters" which pays interest at a rate that varies inversely with
short-term interest rates. As interest rates rise, inverse floaters produce less
current income. Their price may be more volatile than the price of a comparable
fixed-rate security. Inverse floaters amount to $46,972,545 or 10.08% of the
Fund's net assets as of July 31, 1999.
3. When-issued security to be delivered and settled after July 31, 1999.
4. Securities with an aggregate market value of $1,808,680 are held in
collateralized accounts to cover initial margin requirements on open futures
sales contracts. See Note 5 of Notes to Financial Statements.
5. Represents the current interest rate for a variable rate security.
6. Denotes a step bond: a zero coupon bond that converts to a fixed or variable
interest rate at a designated future date.

As of July 31, 1999, securities subject to the alternative minimum tax amount to
$77,814,717 or 16.70% of the Fund's net assets.

Distribution of investments by industry of issue, as a percentage of total
investments at value, is as follows:

Industry                                             Market Value     Percent
-----------------------------------------------------------------------------
Special Assessment                                   $121,100,182        26.2%*
-----------------------------------------------------------------------------
Single-Family Housing                                  55,695,885        12.0
-----------------------------------------------------------------------------
Municipal Leases                                       43,363,362         9.3
-----------------------------------------------------------------------------
Highways                                               42,872,773         9.2
-----------------------------------------------------------------------------
Hospital/Healthcare                                    36,689,836         7.9
-----------------------------------------------------------------------------
Adult Living Facilities                                35,803,683         7.7
-----------------------------------------------------------------------------
Electric Utilities                                     35,145,857         7.6
-----------------------------------------------------------------------------
General Obligation                                     22,923,910         4.9
-----------------------------------------------------------------------------
Water Utilities                                        22,577,811         4.9
-----------------------------------------------------------------------------
Marine/Aviation Facilities                             20,637,629         4.4
-----------------------------------------------------------------------------
Sales Tax                                               9,799,000         2.1
-----------------------------------------------------------------------------
Corporate Backed                                        9,143,025         2.0
-----------------------------------------------------------------------------
Higher Education                                        6,774,486         1.5
-----------------------------------------------------------------------------
Education                                                 938,090         0.2
-----------------------------------------------------------------------------
Resource Recovery                                         544,340         0.1
                                                     ------------       -----
Total                                                $464,009,869       100.0%
                                                     ============       =====

*Securities with a market value of $22,353,273 or 18.46% of total investments at
value are represented by pre-refunded securities, collateralized by U.S.
government securities.

See accompanying Notes to Financial Statements.

                  22   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Assets and Liabilities  July 31, 1999
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


=======================================================================================
Assets
<S>                                                                        <C>
Investments, at value (cost $451,843,264)--see accompanying statement      $464,009,869
---------------------------------------------------------------------------------------
Cash                                                                            187,500
---------------------------------------------------------------------------------------
Receivables and other assets:
Interest                                                                      6,445,459
Investments sold                                                              1,881,411
Shares of beneficial interest sold                                              323,018
Daily variation on futures contracts--Note 5                                     70,469
Other                                                                             4,546
                                                                           ------------
Total assets                                                                472,922,272

=======================================================================================
Liabilities
Payables and other liabilities:
Investments purchased (including $4,107,525 purchased on a
when-issued basis)--Note 1                                                    4,107,525
Dividends                                                                     1,238,112
Shares of beneficial interest redeemed                                        1,191,917
Trustees' compensation--Note 1                                                  162,339
Distribution and service plan fees                                               96,106
Shareholder reports                                                              55,955
Transfer and shareholder servicing agent fees                                    26,547
Custodian fees                                                                    2,937
Other                                                                            51,190
                                                                           ------------
Total liabilities                                                             6,932,628

=======================================================================================
Net Assets                                                                 $465,989,644
                                                                           ============

=======================================================================================
Composition of Net Assets
Paid-in capital                                                            $455,561,717
---------------------------------------------------------------------------------------
Overdistributed net investment income                                        (1,088,872)
---------------------------------------------------------------------------------------
Accumulated net realized loss on investment transactions                       (648,400)
---------------------------------------------------------------------------------------
Net unrealized appreciation on investments--Notes 3 and 5                    12,165,199
                                                                           ------------
Net assets                                                                 $465,989,644
                                                                           ============
</TABLE>



                  23   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Assets and Liabilities  (Continued)
--------------------------------------------------------------------------------
<TABLE>

=======================================================================================
Net Asset Value Per Share
Class A Shares:
<S>                                                                              <C>
Net asset value and redemption price per share (based on net assets of
$316,362,542 and 29,941,203 shares of beneficial interest outstanding)           $10.57
Maximum offering price per share (net asset value plus sales charge
of 4.75% of offering price)                                                      $11.10

---------------------------------------------------------------------------------------
Class B Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and offering price per share (based on net assets of $132,762,787
and 12,560,331 shares of beneficial interest outstanding)                        $10.57

---------------------------------------------------------------------------------------
Class C Shares:
Net asset value, redemption price (excludes applicable contingent deferred sales
charge) and offering price per share (based on net assets of $16,864,315
and 1,598,190 shares of beneficial interest outstanding)                         $10.55
</TABLE>

See accompanying Notes to Financial Statements.


                  24   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statement of Operations  For the Year Ended July 31, 1999
--------------------------------------------------------------------------------
<TABLE>

=======================================================================================
Investment Income
<S>                                                                        <C>
Interest                                                                   $ 26,109,577

=======================================================================================
Expenses
Management fees--Note 4                                                       2,540,982
---------------------------------------------------------------------------------------
Distribution and service plan fees--Note 4:
Class A                                                                         757,647
Class B                                                                       1,294,892
Class C                                                                         146,564
---------------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees--Note 4                           259,539
---------------------------------------------------------------------------------------
Shareholder reports                                                              98,260
---------------------------------------------------------------------------------------
Trustees' compensation--Note 1                                                   47,096
---------------------------------------------------------------------------------------
Custodian fees and expenses                                                      45,007
---------------------------------------------------------------------------------------
Legal, auditing and other professional fees                                      42,049
---------------------------------------------------------------------------------------
Registration and filing fees                                                     15,486
---------------------------------------------------------------------------------------
Insurance expenses                                                                8,257
---------------------------------------------------------------------------------------
Other                                                                            10,495
                                                                           ------------
Total expenses                                                                5,266,274
Less expenses paid indirectly--Note 1                                           (25,729)
                                                                           ------------
Net expenses                                                                  5,240,545

=======================================================================================
Net Investment Income                                                        20,869,032

=======================================================================================
Realized and Unrealized Gain (Loss)
Net realized gain on:
Investments                                                                     199,201
Closing of futures contracts                                                    167,513
                                                                           ------------
Net realized gain                                                               366,714

---------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation on investments        (16,235,114)
                                                                           ------------
Net realized and unrealized loss                                            (15,868,400)

=======================================================================================
Net Increase in Net Assets Resulting from Operations                       $  5,000,632
                                                                           ============
</TABLE>


See accompanying Notes to Financial Statements.


                  25   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Statements of Changes in Net Assets
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                                                Year Ended July 31,
                                                                                1999             1998
=============================================================================================================
Operations
<S>                                                                             <C>              <C>
Net investment income                                                           $ 20,869,032     $ 19,136,459
-------------------------------------------------------------------------------------------------------------
Net realized gain (loss)                                                             366,714       (1,120,364)
-------------------------------------------------------------------------------------------------------------
Net change in unrealized appreciation or depreciation                            (16,235,114)       3,444,127
                                                                                ------------     ------------
Net increase in net assets resulting from operations                               5,000,632       21,460,222

=============================================================================================================
Dividends and/or Distributions to Shareholders
Dividends from net investment income:
Class A                                                                          (15,214,034)     (14,732,831)
Class B                                                                           (5,284,436)      (4,147,106)
Class C                                                                             (600,129)        (359,910)
-------------------------------------------------------------------------------------------------------------
Distributions from net realized gain:
Class A                                                                                   --       (2,092,323)
Class B                                                                                   --         (677,374)
Class C                                                                                   --          (51,258)

=============================================================================================================
Beneficial Interest Transactions
Net increase in net assets resulting from
beneficial interest transactions--Note 2:
Class A                                                                           26,403,170        3,072,554
Class B                                                                           22,044,556       33,042,362
Class C                                                                            6,138,090        5,382,827

=============================================================================================================
Net Assets
Total increase                                                                    38,487,849       40,897,163
-------------------------------------------------------------------------------------------------------------
Beginning of period                                                              427,501,795      386,604,632
                                                                                ------------     ------------
End of period (including overdistributed net investment
income of $1,088,872 and $859,305, respectively)                                $465,989,644     $427,501,795
                                                                                ============     ============
</TABLE>


See accompanying Notes to Financial Statements.

                  26   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Financial Highlights
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                     Class A
                                                     ---------------------------------------------------------------------
                                                     Year Ended                                       Year Ended
                                                     July 31,                                         December 31,
                                                     1999        1998       1997          1996(1)     1995        1994
==========================================================================================================================
Per Share Operating Data
<S>                                                  <C>         <C>        <C>           <C>         <C>         <C>
Net asset value, beginning of period                   $10.92      $10.94     $10.39        $10.69      $ 9.45      $10.97
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                     .53         .54        .58           .33         .58         .60
Net realized and unrealized gain (loss)                  (.35)        .06        .54          (.30)       1.25       (1.51)
                                                       ------      ------     ------        ------      ------      ------
Total income (loss) from
investment operations                                     .18         .60       1.12           .03        1.83        (.91)

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

Dividends and distributions to shareholders:
Dividends from net investment income                     (.53)       (.54)      (.57)         (.33)       (.58)       (.61)
Dividends in excess of net
investment income                                          --          --         --            --        (.01)         --
Distributions from net realized gain                       --        (.08)        --            --          --          --
                                                       ------      ------     ------        ------      ------      ------
Total dividends and distributions
to shareholders                                          (.53)       (.62)      (.57)         (.33)       (.59)       (.61)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                         $10.57      $10.92     $10.94        $10.39      $10.69      $ 9.45
                                                       ======      ======     ======        ======      ======      ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                      1.59%       5.66%     11.11%         0.34%      19.76%      (8.49)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                       $316,363    $300,717   $298,162      $286,033    $285,307    $219,682
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                    $314,094    $297,372   $289,439      $279,796    $250,188    $248,850
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                    4.79%       4.91%      5.49%         5.53%       5.64%       5.99%
Expenses                                                 0.91%       0.92%(4)   0.94%(4)      0.97%(4)    0.95%(4)    0.96%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                 35%         31%        31%           14%         23%         22%
</TABLE>


1. For the seven months ended July 31, 1996. The Fund changed its fiscal year
end from December 31 to July 31.
2. Assumes a $1,000 hypothetical initial investment on the business day before
the first day of the fiscal period (or inception of offering), with all
dividends and distributions reinvested in additional shares on the reinvestment
date, and redemption at the net asset value calculated on the last business day
of the fiscal period. Sales charges are not reflected in the total returns.
Total returns are not annualized for periods of less than one full year.
3. Annualized for periods of less than one full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund.
5. The lesser of purchases or sales of portfolio securities for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period. Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  27   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Financial Highlights  (Continued)
--------------------------------------------------------------------------------
<TABLE>
<CAPTION>


                                                         Class B
                                                         -----------------------------------------------------------------
                                                         Year Ended                                     Year Ended
                                                         July 31,                                       December 31,
                                                         1999          1998         1997       1996(1)  1995       1994
==========================================================================================================================
Per Share Operating Data
<S>                                                      <C>           <C>         <C>        <C>      <C>        <C>
Net asset value, beginning of period                       $10.92        $10.94      $10.39     $10.69   $ 9.44     $10.98
--------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45           .46         .49        .28      .51        .54
Net realized and unrealized gain (loss)                      (.35)          .06         .55       (.30)    1.25      (1.55)
                                                           ------        ------      ------     ------   ------     ------
Total income (loss) from
investment operations                                         .10           .52        1.04       (.02)    1.76      (1.01)

--------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)         (.46)       (.49)      (.28)    (.50)      (.53)
Dividends in excess of net
investment income                                              --            --          --         --     (.01)        --
Distributions from net realized gain                           --          (.08)         --         --       --         --
                                                           ------        ------      ------     ------   ------     ------
Total dividends and distributions
to shareholders                                              (.45)         (.54)       (.49)      (.28)    (.51)      (.53)
--------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.57        $10.92      $10.94     $10.39   $10.69     $ 9.44
                                                           ======        ======      ======     ======   ======     ======

==========================================================================================================================
Total Return, at Net Asset Value(2)                          0.82%         4.86%      10.27%     (0.12)%  18.97%     (9.39)%

==========================================================================================================================
Ratios/Supplemental Data
Net assets, end of period
(in thousands)                                           $132,763      $115,444     $82,474    $52,038  $41,224    $20,224
--------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                        $129,538      $ 99,266     $65,192    $46,422  $29,918    $16,552
--------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%         4.21%       4.70%      4.74%    4.82%      5.17%
Expenses                                                     1.67%         1.67%(4)    1.70%(4)   1.74%(4) 1.72%(4)   1.73%
--------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%           31%         31%        14%      23%        22%
</TABLE>


1. For the seven months ended July 31, 1996. The Fund changed its fiscal year
end from December 31 to July 31.
2. Assumes a $1,000 hypothetical initial investment on the business day before
the first day of the fiscal period (or inception of offering), with all
dividends and distributions reinvested in additional shares on the reinvestment
date, and redemption at the net asset value calculated on the last business day
of the fiscal period. Sales charges are not reflected in the total returns.
Total returns are not annualized for periods of less than one full year.
3. Annualized for periods of less than one full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund.
5. The lesser of purchases or sales of portfolio securities for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period. Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.

                  28   Oppenheimer California Municipal Fund


<PAGE>

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

--------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                          Class C
                                                          ----------------------------------------------------------
                                                                                                             Period
                                                                                                             Ended
                                                          Year Ended July 31,                                Dec. 31,
                                                          1999          1998         1997       1996(1)      1995(6)
--------------------------------------------------------------------------------------------------------------------
Per Share Operating Data
<S>                                                       <C>           <C>         <C>        <C>           <C>
Net asset value, beginning of period                       $10.91        $10.93      $10.38     $10.68        $10.46
--------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                                         .45           .46         .49        .27           .08
Net realized and unrealized gain (loss)                      (.36)          .06         .55       (.30)          .22
                                                           ------        ------      ------     ------        ------
Total income (loss) from
investment operations                                         .09           .52        1.04       (.03)          .30

--------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net investment income                         (.45)         (.46)       (.49)      (.27)         (.07)
Dividends in excess of net
investment income                                              --            --          --         --          (.01)
Distributions from net realized gain                           --          (.08)         --         --            --
                                                           ------         ------     ------     ------        ------
Total dividends and distributions
to shareholders                                              (.45)         (.54)       (.49)      (.27)         (.08)
--------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                             $10.55        $10.91      $10.93     $10.38        $10.68
                                                           ======        ======      ======     ======        ======

====================================================================================================================
Total Return, at Net Asset Value(2)                          0.73%         4.87%      10.26%     (0.19)%        2.90%

====================================================================================================================
Ratios/Supplemental Data
Net assets, end of period (in thousands)                  $16,864       $11,340      $5,969     $2,171          $125
--------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                         $14,672       $ 8,614      $3,869     $1,156          $ 91
--------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:(3)
Net investment income                                        4.03%         4.24%       4.66%      4.54%         4.56%
Expenses                                                     1.67%         1.66%(4)    1.70%(4)   1.80%(4)      1.68%(4)
--------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                                     35%           31%         31%        14%           23%

</TABLE>


1. For the seven months ended July 31, 1996. The Fund changed its fiscal year
end from December 31 to July 31.
2. Assumes a $1,000 hypothetical initial investment on the business day before
the first day of the fiscal period (or inception of offering), with all
dividends and distributions reinvested in additional shares on the reinvestment
date, and redemption at the net asset value calculated on the last business day
of the fiscal period. Sales charges are not reflected in the total returns.
Total returns are not annualized for periods of less than one full year.
3. Annualized for periods of less than one full year.
4. Expense ratio reflects the effect of expenses paid indirectly by the Fund.
5. The lesser of purchases or sales of portfolio securities for a period,
divided by the monthly average of the market value of portfolio securities owned
during the period. Securities with a maturity or expiration date at the time of
acquisition of one year or less are excluded from the calculation. Purchases and
sales of investment securities (excluding short-term securities) for the period
ended July 31, 1999, were $206,390,312 and $160,398,205, respectively.
6. For the period from November 1, 1995 (inception of offering) to December 31,
1995.

See accompanying Notes to Financial Statements.

                  29   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements
--------------------------------------------------------------------------------

================================================================================
1. Significant Accounting Policies
Oppenheimer California Municipal Fund (the Fund) is registered under the
Investment Company Act of 1940, as amended, as a non-diversified, open-end
management investment company. The Fund's investment objective is to seek as
high a level of current interest income exempt from federal and California
income taxes for individual investors as is consistent with preservation of
capital. The Fund's investment advisor is OppenheimerFunds, Inc. (the Manager).
The Fund offers Class A, Class B and Class C shares. Class A shares are sold
with a front-end sales charge, on investments up to $1 million. Class B and
Class C shares may be subject to a contingent deferred sales charge (CDSC). All
classes of shares have identical rights to earnings, assets and voting
privileges, except that each class has its own expenses directly attributable to
that class and exclusive voting rights with respect to matters affecting that
class. Classes A, B and C have separate distribution and/or service plans. Class
B shares will automatically convert to Class A shares six years after the date
of purchase. The following is a summary of significant accounting policies
consistently followed by the Fund.
--------------------------------------------------------------------------------
Securities Valuation. Portfolio securities are valued at the close of the New
York Stock Exchange on each trading day. Listed and unlisted securities for
which such information is regularly reported are valued at the last sale price
of the day or, in the absence of sales, at values based on the closing bid or
the last sale price on the prior trading day. Long-term and short-term
"non-money market" debt securities are valued by a portfolio pricing service
approved by the Board of Trustees. Such securities which cannot be valued by an
approved portfolio pricing service are valued using dealer-supplied valuations
provided the Manager is satisfied that the firm rendering the quotes is reliable
and that the quotes reflect current market value, or are valued under
consistently applied procedures established by the Board of Trustees to
determine fair value in good faith. Short-term "money market type" debt
securities having a remaining maturity of 60 days or less are valued at cost (or
last determined market value) adjusted for amortization to maturity of any
premium or discount. Options are valued based upon the last sale price on the
principal exchange on which the option is traded or, in the absence of any
transactions that day, the value is based upon the last sale price on the prior
trading date if it is within the spread between the closing bid and asked
prices. If the last sale price is outside the spread, the closing bid is used.


                  30   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
Securities Purchased on a When-Issued Basis. Delivery and payment for securities
that have been purchased by the Fund on a forward commitment or when-issued
basis can take place a month or more after the transaction date. Normally the
settlement date occurs within six months after the transaction date; however,
the fund may, from time to time, purchase securities whose settlement date
extends beyond six months and possibly as long as two years or more beyond the
trade date. During this period, such securities do not earn interest, are
subject to market fluctuation and may increase or decrease in value prior to
their delivery. The Fund maintains segregated assets with a market value equal
to or greater than the amount of its purchase commitments. The purchase of
securities on a when-issued or forward commitment basis may increase the
volatility of the Fund's net asset value to the extent the Fund makes such
purchases while remaining substantially fully invested. As of July 31, 1999, the
Fund had entered into outstanding when-issued or forward commitments of
$4,107,525.
--------------------------------------------------------------------------------
Allocation of Income, Expenses, Gains and Losses. Income, expenses (other than
those attributable to a specific class), gains and losses are allocated daily to
each class of shares based upon the relative proportion of net assets
represented by such class. Operating expenses directly attributable to a
specific class are charged against the operations of that class.
--------------------------------------------------------------------------------
Federal Taxes. The Fund intends to continue to comply with provisions of the
Internal Revenue Code applicable to regulated investment companies and to
distribute all of its taxable income, including any net realized gain on
investments not offset by loss carryovers, to shareholders. Therefore, no
federal income or excise tax provision is required. As of July 31, 1999, the
Fund had available for federal tax purposes an unused capital loss carryover of
approximately $650,000, which expires in 2006.
-------------------------------------------------------------------------------
Trustees' Compensation. The Fund has adopted a nonfunded retirement plan for the
Fund's independent Trustees. Benefits are based on years of service and fees
paid to each trustee during the years of service. During the year ended July 31,
1999, a provision of $2,209 was made for the Fund's projected benefit
obligations and payments of $6,365 were made to retired trustees, resulting in
an accumulated liability of $159,162 as of July 31, 1999.
               The Board of Trustees has adopted a deferred compensation plan
for independent Trustees that enables Trustees to elect to defer receipt of all
or a portion of annual compensation they are entitled to receive from the Fund.
Under the plan, the compensation deferred is periodically adjusted as though an
equivalent amount had been invested for the Trustees in shares of one or more
Oppenheimer funds selected by the Trustee. The amount paid to the Trustee under
the plan will be determined based upon the performance of the selected funds.
Deferral of Trustees' fees under the plan will not affect the net assets of the
Fund, and will not materially affect the Fund's assets, liabilities or net
income per share.


                  31   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------


================================================================================
1. Significant Accounting Policies  (continued)
Dividends and Distributions to Shareholders. Dividends and distributions to
shareholders, which are determined in accordance with income tax regulations,
are recorded on the ex-dividend date.
--------------------------------------------------------------------------------
Classification of Distributions to Shareholders. Net investment income (loss)
and net realized gain (loss) may differ for financial statement and tax
purposes. The character of distributions made during the year from net
investment income or net realized gains may differ from its ultimate
characterization for federal income tax purposes. Also, due to timing of
dividend distributions, the fiscal year in which amounts are distributed may
differ from the fiscal year in which the income or realized gain was recorded by
the Fund.
--------------------------------------------------------------------------------
Expense Offset Arrangements. Expenses paid indirectly represent a reduction of
custodian fees for earnings on cash balances maintained by the Fund.
--------------------------------------------------------------------------------
Other. Investment transactions are accounted for as of trade date. Original
issue discount is accreted and premium is amortized in accordance with federal
income tax requirements. For municipal bonds acquired after April 30, 1993, on
disposition or maturity, taxable ordinary income is recognized to the extent of
the lesser of gain or market discount that would have accrued over the holding
period. Realized gains and losses on investments and unrealized appreciation and
depreciation are determined on an identified cost basis, which is the same basis
used for federal income tax purposes.
               There are certain risks arising from geographic concentration in
any state. Certain revenue or tax related events in a state may impair the
ability of certain issuers of municipal securities to pay principal and interest
on their obligations.
               The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of income and expenses during the reporting
period. Actual results could differ from those estimates.


                  32   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
2. Shares of Beneficial Interest
The Fund has authorized an unlimited number of no par value shares of beneficial
interest of each class. Transactions in shares of beneficial interest were as
follows:
<TABLE>
<CAPTION>

                              Year Ended July 31, 1999           Year Ended July 31, 1998
                              -----------------------------      ----------------------------
                              Shares          Amount             Shares         Amount
--------------------------------------------------------------------------------------------
Class A:
<S>                           <C>             <C>                <C>            <C>
Sold                           6,301,987      $ 69,153,860        4,625,371     $ 50,462,764
Dividends and/or
distributions reinvested         818,090         8,975,978          921,790       10,031,986
Redeemed                      (4,716,845)      (51,726,668)      (5,266,312)     (57,422,196)
                              ----------      ------------       ----------     ------------
Net increase                   2,403,232      $ 26,403,170          280,849     $  3,072,554
                              ==========      ============       ==========     ============

--------------------------------------------------------------------------------------------
Class B:
Sold                           3,406,294      $ 37,480,696        3,871,772     $ 42,232,554
Dividends and/or
distributions reinvested         301,331         3,307,444          279,759        3,046,210
Redeemed                      (1,715,264)      (18,743,584)      (1,120,147)     (12,236,402)
                              ----------      ------------       ----------     ------------
Net increase                   1,992,361      $ 22,044,556        3,031,384     $ 33,042,362
                              ==========      ============       ==========     ============

--------------------------------------------------------------------------------------------
Class C:
Sold                             856,519      $  9,406,000          697,841     $  7,611,935
Dividends and/or
distributions reinvested          37,673           412,830           29,500          320,853
Redeemed                        (335,760)       (3,680,740)        (233,849)      (2,549,961)
                              ----------      ------------       ----------     ------------
Net increase                     558,432      $  6,138,090          493,492     $  5,382,827
                              ==========      ============       ==========     ============
</TABLE>


================================================================================
3. Unrealized Gains and Losses on Securities
As of July 31, 1999, net unrealized appreciation on securities of $12,166,605
was composed of gross appreciation of $18,048,861, and gross depreciation of
$5,882,256.


                  33   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------


================================================================================
4. Management Fees and Other Transactions with Affiliates
Management Fees. Management fees paid to the Manager were in accordance with the
investment advisory agreement with the Fund which provides for a fee of 0.60% of
the first $200 million of average annual net assets, 0.55% of the next $100
million, 0.50% of the next $200 million, 0.45% of the next $250 million, 0.40%
of the next $250 million and 0.35% of average annual net assets in excess of $1
billion. The Fund's management fees for the year ended July 31, 1999, was 0.55%
of the average annual net assets for each class of shares.
--------------------------------------------------------------------------------
Transfer Agent Fees. OppenheimerFunds Services (OFS), a division of the Manager,
is the transfer and shareholder servicing agent for the Fund and for other
Oppenheimer funds. OFS's total costs of providing such services are allocated
ratably to these funds.
--------------------------------------------------------------------------------
Distribution and Service Plan Fees. Under its General Distributor's Agreement
with the Manager, the Distributor acts as the Fund's principal underwriter in
the continuous public offering of the different classes of shares of the Fund.

The compensation paid to (or retained by) the Distributor from the sale of
shares or on the redemption of shares is shown in the table below for the period
indicated.
<TABLE>
<CAPTION>

                   Aggregate          Class A          Commissions         Commissions           Commissions
                   Front-End          Front-End        On Class A          On Class B            On Class C
                   Sales Charges      Sales Charges    Shares              Shares                Shares
                   On Class A         Retained by      Advanced by         Advanced by           Advanced by
Year Ended         Shares             Distributor      Distributor(1)      Distributor(1)        Distributor(1)
---------------------------------------------------------------------------------------------------------------
<S>                <C>                <C>              <C>                 <C>                          <C>
July 31, 1999      $924,929           $154,753         $188,991            $1,254,294                   $84,556

1. The Distributor advances commission payments to dealers for certain sales of
Class A shares and for sales of Class B and Class C shares from its own
resources at the time of sale.

                     Class A                           Class B                          Class C
                     Contingent Deferred               Contingent Deferred              Contingent Deferred
                     Sales Charges                     Sales Charges                    Sales Charges
Year Ended           Retained by Distributor           Retained by Distributor          Retained by Distributor
---------------------------------------------------------------------------------------------------------------
July 31, 1999        $--                               $291,981                                          $8,385
</TABLE>


      The Fund has adopted a Service Plan for Class A shares and Distribution
and Service Plans for Class B and Class C shares under Rule 12b-1 of the
Investment Company Act. Under those plans the Fund pays the Distributor for all
or a portion of its costs incurred in connection with the distribution and/or
servicing of the shares of the particular class.


                  34   Oppenheimer California Municipal Fund
<PAGE>

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

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


================================================================================
Class A Service Plan Fees. Under the Class A service plan, the Distributor
currently uses the fees it receives from the Fund to pay brokers, dealers and
other financial institutions. The Class A service plan permits reimbursements to
the Distributor at a rate of up to 0.25% of average annual net assets of Class A
shares. The Distributor makes payments to plan recipients quarterly at an annual
rate not to exceed 0.25% of the average annual net assets consisting of Class A
shares of the Fund. For the fiscal year ended July 31, 1999, payments under the
Class A Plan totaled $757,647, all of which was paid by the Distributor to
recipients. That included $25,906 paid to an affiliate of the Distributor's
parent company. Any unreimbursed expenses the Distributor incurs with respect to
Class A shares in any fiscal year cannot be recovered in subsequent years.
--------------------------------------------------------------------------------
Class B and Class C Distribution and Service Plan Fees. Under each plan, service
fees and distribution fees are computed on the average of the net asset value of
shares in the respective class, determined as of the close of each regular
business day during the period. The Class B and Class C plans provide for the
Distributor to be compensated at a flat rate,whether the Distributor's
distribution expenses are more or less than the amounts paid by the Fund under
the plan during the period for which the fee is paid.
               The Distributor retains the asset-based sales charge on Class B
shares. The Distributor retains the asset-based sales charge on Class C shares
during the first year the shares are outstanding. The asset-based sales charges
on Class B and Class C shares allow investors to buy shares without a front-end
sales charge while allowing the Distributor to compensate dealers that sell
those shares.
               The Distributor's actual expenses in selling Class B and Class C
shares may be more than the payments it receives from the contingent deferred
sales charges collected on redeemed shares and from the Fund under the plans. If
either the Class B or the Class C plan is terminated by the Fund, the Board of
Trustees may allow the Fund to continue payments of the asset-based sales charge
to the Distributor for distributing shares before the plan was terminated. The
plans allow for the carry-forward of distribution expenses, to be recovered from
asset-based sales charges in subsequent fiscal periods.

Distribution fees paid to the Distributor for the year ended July 31, 1999, were
as follows:
<TABLE>
<CAPTION>
                                                                                Distributor's             Distributor's
                                                                                Aggregate                 Unreimbursed
                                                                                Unreimbursed              Expenses
                           Total Payments            Amount Retained            Expenses                  As % of Net
Class                      Under Plan                By Distributor             Under Plan                Assets of Class
-------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                       <C>                        <C>                                 <C>
Class B Plan               $1,294,892                $1,062,283                 $4,059,718                          3.06%
-------------------------------------------------------------------------------------------------------------------------
Class C Plan               $  146,564                $   93,541                 $  207,394                          1.23%
</TABLE>


                  35   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Notes to Financial Statements  (Continued)
--------------------------------------------------------------------------------

================================================================================
5. Futures Contracts
The Fund may buy and sell futures contracts in order to gain exposure to or to
seek to protect against changes in interest rates. The Fund may also buy or
write put or call options on these futures contracts.
               The Fund generally sells futures contracts to hedge against
increases in interest rates and the resulting negative effect on the value of
fixed rate portfolio securities. The Fund may also purchase futures contracts to
gain exposure to changes in interest rates as it may be more efficient or cost
effective than actually buying fixed income securities.
               Upon entering into a futures contract, the Fund is required to
deposit either cash or securities (initial margin) in an amount equal to a
certain percentage of the contract value. Subsequent payments (variation margin)
are made or received by the Fund each day. The variation margin payments are
equal to the daily changes in the contract value and are recorded as unrealized
gains and losses. The Fund may recognize a realized gain or loss when the
contract is closed or expires.
               Securities held in collateralized accounts to cover initial
margin requirements on open futures contracts are noted in the Statement of
Investments. The Statement of Assets and Liabilities reflects a receivable
and/or payable for the daily mark to market for variation margin.
               Risks of entering into futures contracts (and related options)
include the possibility that there may be an illiquid market and that a change
in the value of the contract or option may not correlate with changes in the
value of the underlying securities.

As of July 31, 1999, the Fund had outstanding futures contracts as follows:
<TABLE>
<CAPTION>

                           Expiration       Number of         Valuation as of         Unrealized
Contract Description       Date             Contracts         July 31, 1999           Depreciation
--------------------------------------------------------------------------------------------------
Contracts to Sell
-----------------
<S>                        <C>    >         <C>               <C>                           <C>
U.S. Long Bond             9/21/99          205               $23,568,594                   $1,406
</TABLE>


================================================================================
6. Bank Borrowings
The Fund may borrow from a bank for temporary or emergency purposes including,
without limitation, funding of shareholder redemptions provided asset coverage
for borrowings exceeds 300%. The Fund has entered into an agreement which
enables it to participate with other Oppenheimer funds in an unsecured line of
credit with a bank, which permits borrowings up to $400 million, collectively.
Interest is charged to each fund, based on its borrowings, at a rate equal to
the Federal Funds Rate plus 0.35%. Borrowings are payable 30 days after such
loan is executed. The Fund also pays a commitment fee equal to its pro rata
share of the average unutilized amount of the credit facility at a rate of
0.0575% per annum.
               The Fund had no borrowings outstanding during the year ended July
31, 1999.


                  36   Oppenheimer California Municipal Fund
<PAGE>


--------------------------------------------------------------------------------
Independent Auditors' Report
--------------------------------------------------------------------------------


================================================================================
The Board of Trustees and Shareholders of
Oppenheimer California Municipal Fund:

We have audited the accompanying statement of assets and liabilities, including
the statement of investments, of Oppenheimer California Municipal Fund as of
July 31, 1999, and the related statement of operations for the year then ended,
the statements of changes in net assets for each of the years in the two-year
period then ended and the financial highlights for each of the years in the
three-year period then ended, the seven-month period ended July 31, 1996, and
each of the years in the two-year period ended December 31, 1995. These
financial statements and financial highlights are the responsibility of the
Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.
               We conducted our audits in accordance with generally accepted
auditing standards. Those standards require that we plan and perform the audit
to obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of securities
owned as of July 31, 1999, by correspondence with the custodian and brokers; and
where confirmations were not received from brokers, we performed other auditing
procedures. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.
               In our opinion, the financial statements and financial highlights
referred to above present fairly, in all material respects, the financial
position of Oppenheimer California Municipal Fund as of July 31, 1999, the
results of its operations for the year then ended, the changes in its net assets
for each of the years in the two-year period then ended, and the financial
highlights for each of the years in the three-year period then ended, the
seven-month period ended July 31, 1996, and each of the years in the two-year
period ended December 31, 1995, in conformity with generally accepted accounting
principles.

KPMG LLP

Denver, Colorado
August 20, 1999

                  37   Oppenheimer California Municipal Fund
<PAGE>

--------------------------------------------------------------------------------
Federal Income Tax Information  (Unaudited)
--------------------------------------------------------------------------------


================================================================================
In early 2000, shareholders will receive information regarding all dividends and
distributions paid to them by the Fund during calendar year 1999. Regulations of
the U.S. Treasury Department require the Fund to report this information to the
Internal Revenue Service.
               None of the dividends paid by the Fund during the fiscal year
ended July 31, 1999, are eligible for the corporate dividend-received deduction.
The dividends were derived from interest on municipal bonds and are not subject
to federal income tax. To the extent a shareholder is subject to any state or
local tax laws, some or all of the dividends received may be taxable.
               The foregoing information is presented to assist shareholders in
reporting distributions received from the Fund to the Internal Revenue Service.
Because of the complexity of the federal regulations which may affect your
individual tax return and the many variations in state and local tax
regulations, we recommend that you consult your tax advisor for specific
guidance.


                  38   Oppenheimer California Municipal Fund
<PAGE>


--------------------------------------------------------------------------------
Oppenheimer California Municipal Fund
--------------------------------------------------------------------------------

================================================================================
Officers and Trustees        Leon Levy, Chairman of the Board of Trustees
                             Donald W. Spiro, Vice Chairman of the Board
                                  of Trustees
                             Bridget A. Macaskill, Trustee and President
                             Robert G. Galli, Trustee
                             Phillip A. Griffiths, Trustee
                             Benjamin Lipstein, Trustee
                             Elizabeth B. Moynihan, Trustee
                             Kenneth A. Randall, Trustee
                             Edward V. Regan, Trustee
                             Russell S. Reynolds, Jr., Trustee
                             Pauline Trigere, Trustee
                             Clayton K. Yeutter, Trustee
                             Caryn Halbrecht, Vice President
                             Andrew J. Donohue, Secretary
                             Brian W. Wixted, Treasurer
                             Robert G. Zack, Assistant Secretary
                             Robert J. Bishop, Assistant Treasurer
                             Scott T. Farrar, Assistant Treasurer


================================================================================
Investment Advisor           OppenheimerFunds, Inc.

================================================================================
Distributor                  OppenheimerFunds Distributor, Inc.

================================================================================
Transfer and Shareholder     OppenheimerFunds Services
Servicing Agent

================================================================================
Custodian of                 Citibank, N.A.
Portfolio Securities

================================================================================
Independent Auditors         KPMG LLP

================================================================================
Legal Counsel                Mayer, Brown & Platt

                             This is a copy of a report to shareholders of
                             Oppenheimer California Municipal Fund. This report
                             must be preceded or accompanied by a Prospectus of
                             Oppenheimer California Municipal Fund. For material
                             information concerning the Fund, see the
                             Prospectus.
                             Shares of Oppenheimer funds are not deposits or
                             obligations of any bank, are not guaranteed by any
                             bank, are not insured by the FDIC or any other
                             agency, and involve investment risks, including the
                             possible loss of the principal amount invested.


                  39   Oppenheimer California Municipal Fund
<PAGE>


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

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                               OppenheimerFunds(R)
                                Distributor, Inc.

RA0790.001.0799  September 29, 1999





                      OPPENHEIMER CALIFORNIA MUNICIPAL FUND
            FORM N-14

                                     PART C

                                OTHER INFORMATION


Item 15.  Indemnification

      Reference  is made to the  provisions  of  Article  Seven of  Registrant's
Amended  and  Restated  Declaration  of  Trust  filed as  Exhibit  23(a) to this
Registration Statement, and incorporated herein by reference.

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

                                Item 16. Exhibits

(1)  Amended and Restated  Declaration  of Trust dated  September  16, 1996:
     Previously  filed  with  Registrant's   Post-Effective  Amendment  No.  14,
     (10/30/96) and incorporated herein by reference.

(2) (a) Amended By-Laws:  Previously filed with Registrant's Post-Effective
     Amendment  No.  1  (10/7/88)  refiled  with   Registrant's   Post-Effective
     Amendment  No. 10  (4/25/95)  pursuant to Item 102 of  Regulation  S-T, and
     incorporated herein by reference.

     (b) Amended and Restated By-Laws dated as of June 4, 1998: Previously filed
     with   Registrant's   Post-Effective   Amendment  No.  18,  (11/22/99)  and
     incorporated herein by reference.


(3)   N/A.

(4)  Agreement and Plan of  Reorganization:  See Exhibit A to Part A of the
     Registration Statement.

(5)  (a)  Specimen  Class  A  Share  Certificate:   Previously  filed  with
     Registrant's Post- Effective Amendment No. 14 (10/30/96),  and incorporated
     herein by reference.

     (b) Specimen Class B Share Certificate:  Previously filed with Registrant's
     Post- Effective  Amendment No. 14 (10/30/96),  and  incorporated  herein by
     reference.

     (c) Specimen Class C Share Certificate:  Previously filed with Registrant's
     Post-Effective  Amendment No. 14  (10/30/96),  and  incorporated  herein by
     reference.

(6) Investment Advisory Agreement dated October 22, 1990:  Previously filed
     with  Post-Effective  Amendment No. 3 (2/2/91),  refiled with  Registrant's
     Post-Effective   Amendment  No.  10  (4/25/95)  pursuant  to  Item  102  of
     Regulation S-T and incorporated herein by reference.

(7) (a) General Distributor's Agreement dated December 10, 1992: Previously
     filed with Registrant's  Post-Effective Amendment No. 6 (4/28/93),  refiled
     with  Registrant's  Post-Effective  Amendment No. 10 (4/25/95)  pursuant to
     Item 102 of Regulation S-T and incorporated herein by reference.

     (b)  Form  of  Dealer  Agreement  of  OppenheimerFunds  Distributor,  Inc.:
     Previously  filed with  Pre-Effective  Amendment No. 2 to the  Registration
     Statement of Oppenheimer Trinity Value Fund (Reg. No. 333-79707),  8/25/99,
     and incorporated herein by reference.

     (c)  Form  of  Agency  Agreement  of  OppenheimerFunds  Distributor,  Inc.:
     Previously  filed with  Pre-Effective  Amendment No. 2 to the  Registration
     Statement of Oppenheimer Trinity Value Fund (Reg. No. 333-79707),  8/25/99,
     and incorporated herein by reference.

     (d)  Form  of  Broker  Agreement  of  OppenheimerFunds  Distributor,  Inc.:
     Previously  filed with  Pre-Effective  Amendment No. 2 to the  Registration
     Statement of Oppenheimer Trinity Value Fund (Reg. No. 333-79707),  8/25/99,
     and incorporated herein by reference.

(8) (a) Form of Deferred Compensation Agreement for Disinterested Trustees:
     Filed with Post-Effective Amendment No. 26 to the Registration Statement of
     Oppenheimer Gold & Special Minerals Fund (Reg. No. 2-82590),  10/28/98, and
     incorporated by reference.

     (b) Retirement Plan for Non-Interested Trustees or Directors dated 6/7/90 -
     Filed with Post-Effective Amendment No. 97 to the Registration Statement of
     Oppenheimer Fund (File No. 2-14586)  8/30/90,  refiled with  Post-Effective
     Amendment No. 45 of Oppenheimer  Growth Fund (Reg. No.  2-45272),  8/22/94,
     pursuant  to  Item  102 of  Regulation  S-T,  and  incorporated  herein  by
     reference.

(9)  Custody  Agreement  dated  November  1,  1988:  Previously  filed with
     Registrant's  Post-Effective  Amendment  No.  2  (10/31/88),  refiled  with
     Registrant's Post-Effective Amendment No. 10 (4/25/95) pursuant to Item 102
     of Regulation S-T and incorporated herein by reference.

(10) (a) Service Plan and Agreement for Class A shares dated June 10, 1993:
     Previously  filed  with   Registrant's   Post-Effective   Amendment  No.  8
     (4/29/94), and incorporated herein by reference.

     (b)  Distribution  and Service Plan and  Agreement for Class B shares dated
     February  12,  1998:  Previously  filed  with  Registrant's  Post-Effective
     Amendment No. 17, (11/24/98).

     (c)  Distribution  and Service Plan and  Agreement for Class C shares dated
     February  12,  1998:  Previously  filed  with  Registrant's  Post-Effective
     Amendment No. 17 (11/28/98), and incorporated herein by reference.

(11)  Opinion and Consent of Counsel: Filed herewith.

(12)  Tax  Opinions  Relating  to  the  Reorganization:   To  be  filed  by
     post-effective amendment.

(13)  N/A.

(14)  (a)   Consent of Deloitte & Touche LLP:  Filed herewith.

(b)   Consent of KPMG LLP:  Filed herewith.

(15)  N/A.

(16) Powers of Attorney for all  Trustees/Directors:  Previously filed with
     Pre-Effective  Amendment No. 3 to the Registration Statement of Oppenheimer
     Emerging   Technologies   Fund  (Reg.  No.   333-32108)  on  4/25/00,   and
     incorporated herein by reference.

(17)  N/A.

Item 17.  Undertakings

(1)   N/A.

(2)   N/A.




<PAGE>


                                   SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and/or the Investment
Company Act of 1940, the Registrant has duly caused this Registration  Statement
to be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of New York and State of New York on the 16th day of August, 2000.

      Oppenheimer California Municipal Fund


                                         /s/ Leon Levy*          Chairman of the
                                       --------------------------------    Board
of Trustees
                                          Leon Levy

Pursuant to the  requirements of the Securities Act of 1933,  this  Registration
Statement  has been signed below by the following  persons in the  capacities on
the dates indicated:

Signatures                    Title                            Date

/s/ Leon Levy*                Chairman of the                    August 16, 2000
-------------------------------------      Board of Trustees
Leon Levy

/s/ Donald W. Spiro*                Vice Chairman and               August   16,
2000
-------------------------------------      Trustee
Donald W. Spiro

/s/ Robert G. Galli*                Trustee                         August   16,
2000
-------------------------------------
Robert G. Galli

/s/ Phillip A. Griffiths*           Trustee                         August   16,
2000
------------------------------------
Phillip A. Griffiths

/s/ Benjamin Lipstein*        Trustee                            August 16, 2000
-------------------------------------
Benjamin Lipstein

/s/ Bridget A. Macaskill*           President,                      August   16,
2000
-------------------------------------      Principal Executive
Bridget A. Macaskill                Officer, Trustee

/s/ Elizabeth B. Moynihan*          Trustee                         August   16,
2000
-------------------------------------
Elizabeth B. Moynihan

/s/ Kenneth A. Randall*       Trustee                            August 16, 2000
-------------------------------------
Kenneth A. Randall


<PAGE>



/s/ Edward V. Regan*                Trustee                         August   16,
2000
-------------------------------------
Edward V. Regan

/s/ Russell S. Reynolds, Jr.*       Trustee                         August   16,
2000
-------------------------------------
Russell S. Reynolds, Jr.

/s/ Brian W. Wixted*                Treasurer                    August 16, 2000
-------------------------------------
Brian W. Wixted

/s/ Clayton K. Yeutter*       Trustee                            August 16, 2000
-------------------------------------
Clayton K. Yeutter


*By: /s/ Robert G. Zack
---------------------------------------------
August 16, 2000
Robert G. Zack, Attorney-in-Fact



<PAGE>



                      OPPENHEIMER CALIFORNIA MUNICIPAL FUND


      EXHIBIT INDEX



Exhibit No.                         Description

16(11)                  Legal Opinion Relating to Reorganization

16(14)(a)               Deloitte & Touche LLP -- Independent Auditors Consent

16(14)(b)               KPMG LLP -- Independent Auditors Consent





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