CENTENNIAL CALIFORNIA TAX EXEMPT TRUST
N-30D, 1998-09-08
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<PAGE>

[Cover Page]

1998 ANNUAL REPORT
CENTENNIAL CALIFORNIA TAX EXEMPT TRUST
June 30, 1998


<PAGE>


[Blank Page]

<PAGE>

JAMES C. SWAIN
Chairman 
Centennial California 
Tax Exempt Trust

BRIDGET A. MACASKILL
President
Centennial California
Tax Exempt Trust


DEAR SHAREHOLDER,

In a year of  excitement  and  volatility  for stock  markets  here and  abroad,
tax-exempt money market funds,  such as Centennial  California Tax Exempt Trust,
generally  continued to provide  relatively stable returns.  True, the supply of
and demand for tax-exempt securities are variable, causing fluctuations in yield
on a  month-to-month  basis.  Nevertheless,  the overall  pattern of  tax-exempt
yields generally tends to track the actions of the Federal Reserve Board,  which
raises and lowers  short-term  interest  rates  based on its view of  inflation.
Because the Fed stayed on the sidelines  for the entire fiscal year,  tax-exempt
yields remained relatively unchanged.

Two  opposing  forces have kept the Fed from raising or lowering  rates.  On one
hand, the U.S. economy continues to grow at a strong pace, with the unemployment
rate at just 4.5% and consumer  confidence soaring. On the other hand, the Asian
financial crisis shows no signs of easing,  which has weakened global demand for
goods  and  services.  Since the  United  States  is a major  exporter  to Asia,
slackening  demand  and  devalued  currencies  in the Far East  have  created  a
dampening  effect  on  inflation.  Remarkably,  seven  years  into  an  economic
expansion, U.S. inflation is now trending below 2%.

For the fiscal year ended June 30, 1998,  the  Centennial  California Tax Exempt
Trust  produced a compounded  annual yield of 2.86%.  Without  compounding,  the
corresponding  yield was 2.82%.  For  investors  in the combined 42% Federal and
California  state income tax bracket,  this is  equivalent to a taxable yield of
4.93% with  compounding,  and 4.86%  without.  On June 30, 1998,  the  seven-day
annualized  yields,  with  and  without  compounding,   were  2.79%  and  2.76%,
respectively.(1)  It is important to remember  that an  investment in the Trust
is neither insured nor guaranteed by the U.S. government, and there is no 
assurance that the Trust will maintain a stable $1.00 share price in the future.

Generally  speaking,  securities that mature in several months pay higher yields
than those maturing within days or weeks. The reason is that the issuer needs to
compensate the investor for the risk that future  inflation could trigger higher
interest rates,  which would create  more-attractive  investment  opportunities.
However, because of today's very low inflationary environment,  tax-exempt money
market securities with longer maturities have not offered much extra yield. 

The California  economy has improved  dramatically  in the  last  year  or  two,
bolstered  by the  booming entertainment,  manufacturing and high technology 
industries.  Because investors and  issuers  assume  there  is very  little  
additional  risk in  lower-quality credits, yields on these lower-quality 
credits are just marginally  higher. We don't believe  sacrificing credit 
quality for this slight benefit is worthwhile, particularly in light of the 
potential risks posed by the Asian economic crisis on California, which is a 
major trading partner.

During the rest of 1998 and beyond, we plan to continue monitoring global events
so that we can  position the  portfolio  accordingly. If the Asian crisis 
diminishes and the U.S. economy continues growing, then we would expect the 
Federal Reserve Board to raise short-term interest rates to keep inflation in 
check. In that event, we would keep the portfolio's maturity fairly short to 
allow us to reinvest at higher yeilds.  however, if the U.S. economy should 
begin to slow and the Fed appears likely to lower short-term interest rates, 
then we would lengthen the portfolio's
         
3 Centennial Californina Tax Exempt Trust

<PAGE>

maturity to lock in higher yeilds.  In either case, we will continue to
invest  conservatively,  always  keeping in mind your objectives of safety and
liquidity.

Thank you for your confidence in Centennial California Tax Exempt Trust.  
We look forward to helping you reach your  investment  goals, part of our 
commitment to you as The Right Way to Invest.

Sincerely,

/S/ James C. Swain
James C. Swain


/S/ Bridget A. Macaskill
Bridget A. Macaskill
July 22, 1998

1. Compounded yields assume reinvestment of dividends.  Past performance is not
indicative of future results.

4 Centennial California Tax Exempt Trust

<PAGE>

<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENT OF INVESTMENTS June 30, 1998
Centennial California Tax Exempt Trust


                                                                                          FACE                    VALUE
                                                                                          AMOUNT                  SEE NOTE 1
<S>                                                                             <C>       <C>                     <C>    
=============================================================================================================================
SHORT-TERM TAX-EXEMPT OBLIGATIONS - 97.3%
- -----------------------------------------------------------------------------------------------------------------------------
CALIFORNIA - 97.3%
- -----------------------------------------------------------------------------------------------------------------------------
Agoura Hills, CA MH RRB, Oakridge Apts. Project, 3.55%                          1         $2,900,000              $2,900,000
- -----------------------------------------------------------------------------------------------------------------------------
CA CDAU Apartment Development RRB, Whispering Winds Apts., Series D, 3.55%      1          5,750,000               5,750,000
- -----------------------------------------------------------------------------------------------------------------------------
CA EDFAU IDV RB, Inland Empire Venture, LLC Project, 3.55%                      1          1,875,000               1,875,000
- -----------------------------------------------------------------------------------------------------------------------------
CA EDFAU RB, California Independent System Project:
Series B, 3.40%                                                                 1          2,000,000               2,000,000
Series D, 3.50%                                                                 1          1,600,000               1,600,000
- -----------------------------------------------------------------------------------------------------------------------------
CA GOB Tendered Option Certificates, Series 1998A, MBIA Insured, 4%             1          3,470,000               3,470,000
- -----------------------------------------------------------------------------------------------------------------------------
CA HFFAU RRB, Catholic West Project, Series C, MBIA Insured, 3%                 1          5,000,000               4,999,751
- -----------------------------------------------------------------------------------------------------------------------------
CA M-S-R PPA RB, San Juan Project, Sub. Lien, Series E, MBIA Insured, 3.10%     1          2,000,000               1,999,920
- -----------------------------------------------------------------------------------------------------------------------------
CA PCFAU RB:
Chevron USA, Inc. Project, 3.65%, 5/15/99                                                  2,500,000               2,500,000
Pacific Gas, 3.35%, 8/6/98                                                      2          1,000,000               1,000,000
Southern California Edison Co. Project, Series C, 3.60%, 8/12/98                2          1,050,000               1,050,000
Southern California Edison Co. Project, Series D, 3.60%, 8/12/98                2          4,100,000               4,100,000
- -----------------------------------------------------------------------------------------------------------------------------
CA PCFAU RRB, Pacific Gas & Electric:
Series A, 3.50%                                                                 1          2,700,000               2,700,000
Series C, 3.35%                                                                 1          3,400,000               3,400,000
- -----------------------------------------------------------------------------------------------------------------------------
CA PCFAU SWD RB:
Shell Oil Co. Martinez Project, Series A, 3.35%                                 1          1,700,000               1,700,000
Western Waste Industries, Series A, 3.70%                                       1          1,500,000               1,500,000
- -----------------------------------------------------------------------------------------------------------------------------
CA PCFAU SWD RR RB, Shell Martinez Refining, Series A, 3.40%                    1          5,300,000               5,300,000
- -----------------------------------------------------------------------------------------------------------------------------
CA School Cash Reserve Program Authority Nts., Series A, AMBAC Insured, 
4.75%, 7/2/98                                                                              7,965,000               7,965,229
- -----------------------------------------------------------------------------------------------------------------------------
CA Statewide CDC IDV RB, Propak California Corp., Series B, 3.40%               1            700,000                 700,000
- -----------------------------------------------------------------------------------------------------------------------------
CA University Board of Regents RB, 3.20%, 8/10/98                                          6,000,000               6,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Covina City, CA RA MH RRB, Shadowhills Apts., Inc., Series A, 3.70%             1          3,000,000               3,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA MTAU Sales Tax RB, Series SG54, AMBAC Insured, 3.60%      1          1,000,000               1,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Los Angeles Cnty., CA Pension Obligation RRB, Series A, 3.10%                   1          7,300,000               7,300,000
- -----------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA Airport RB, Series SG61, 3.63%                                  1          6,000,000               6,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA Department of Water RB, Power Project, 3.40%, 7/13/98                      3,000,000               3,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Los Angeles, CA Wastewater System RB, 3.50%, 8/7/98                                        2,100,000               2,100,000
- -----------------------------------------------------------------------------------------------------------------------------
Modesto, CA Irrigation District FAU RB, Series SG66, 3.58%                      1          5,500,000               5,500,000
- -----------------------------------------------------------------------------------------------------------------------------
Oceanside, CA MH RRB, Lakeridge Apts. Project, 3.80%                            1          7,000,000               7,000,160
- -----------------------------------------------------------------------------------------------------------------------------
Orange Cnty., CA Sanitation District COP, FGIC Insured, 3.50%                   1          1,000,000               1,000,000
- -----------------------------------------------------------------------------------------------------------------------------
Pittsburg, CA Mortgage Obligation RRB, Series A, 3.61%                          1          7,000,000               7,000,035
- -----------------------------------------------------------------------------------------------------------------------------
Riverside Cnty., CA HAU MH RB, McKinley Project, 3.30%                          1          6,300,000               6,300,082
- -----------------------------------------------------------------------------------------------------------------------------
Sacramento Cnty., CA MH RRB, Issue A, 3.30%                                     1          3,400,000               3,400,071
- -----------------------------------------------------------------------------------------------------------------------------
Sacramento Cnty., CA Tax & RAN, 4.50%, 9/30/98                                             3,700,000               3,708,488
- -----------------------------------------------------------------------------------------------------------------------------
Sacramento, CA MUD RB, 3.35%, 8/5/98                                                       7,000,000               7,000,000
- -----------------------------------------------------------------------------------------------------------------------------
San Bernardino Cnty., CA COP, West Valley Detention Center Project, 
7.70%, 11/1/98                                                                  2          8,975,000               9,195,142


5

</TABLE>

<PAGE>

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------
STATEMENT OF INVESTMENTS (Continued)
Centennial California Tax Exempt Trust


                                                                                          FACE                 VALUE
                                                                                          AMOUNT               SEE NOTE 1
<S>                                                                             <C>       <C>                  <C>
- -----------------------------------------------------------------------------------------------------------------------------
CALIFORNIA (CONTINUED)
- -----------------------------------------------------------------------------------------------------------------------------
San Diego Cnty., CA Tax & RAN, 4.50%, 9/30/98                                             $4,920,000           $   4,930,262
- -----------------------------------------------------------------------------------------------------------------------------
San Diego, CA MH RRB, Coral Point Apts. Project, Series A, 3.80%                1          2,500,000               2,500,000
- -----------------------------------------------------------------------------------------------------------------------------
San Francisco, CA City & Cnty.:
International Airport RB, Series 88, 3.58%                                      1          1,700,000               1,700,000
Redevelopment FAU RRB, Yerba Buena Garden, 3.20%                                1          2,150,000               2,150,040
- -----------------------------------------------------------------------------------------------------------------------------
San Marcos, CA RA MH Bonds, San Marcos Retirement Village Project, 4.33%        1          2,400,000               2,400,000
- -----------------------------------------------------------------------------------------------------------------------------
Southern CA Metropolitan Water District Waterworks RRB, Series A, 
AMBAC Insured, 3%                                                               1            600,000                 599,998
- -----------------------------------------------------------------------------------------------------------------------------
Visalia, CA IDV RB, Akers West Assn., 3.25%                                     1          2,350,000               2,350,000

- -----------------------------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS, AT VALUE                                                                     97.3%          151,644,178
- -----------------------------------------------------------------------------------------------------------------------------
OTHER ASSETS NET OF LIABILITIES                                                                  2.7             4,187,755
                                                                                        ------------          ---------------
NET ASSETS                                                                                     100.0%         $155,831,933
                                                                                        ============          ===============

To simplify the  listings of  securities,  abbreviations  are used per the table
below:
CDAU - Communities Development Authority           MTAU - Metropolitan Transportation Authority
CDC - Community Development Corp.                  MUD - Municipal Utility District
COP - Certificates of Participation                PCFAU - Pollution Control Finance Authority
EDFAU - Economic Development Finance Authority     PPA - Public Power Agency
FAU - Finance Authority                            RA - Redevelopment Agency
GOB - General Obligation Bonds                     RAN - Revenue Anticipation Nts.
HAU - Housing Authority                            RB - Revenue Bonds
HFFAU - Health Facilities Finance Authority        RR - Resource Recovery
IDV - Industrial Development                       RRB - Revenue Refunding Bonds
MH - Multifamily Housing                           SWD - Solid Waste Disposal

</TABLE>


1.  Floating or variable  rate  obligation  maturing in more than one year.  The
interest  rate,  which is based on  specific,  or an index of,  market  interest
rates, is subject to change  periodically  and is the effective rate on June 30,
1998. This  instrument may also have a demand feature which allows,  on up to 30
days' notice,  the recovery of principal at any time, or at specified  intervals
not exceeding one year. 
2. Put  obligation  redeemable at full face value on the date reported.

See accompanying Notes to Financial Statements.

6

<PAGE>


<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENT OF ASSETS AND LIABILITIES June 30, 1998
Centennial California Tax Exempt Trust


<S>                                                                                                             <C>
=============================================================================================================================
ASSETS
Investments, at value                                                                                           $151,644,178
- -----------------------------------------------------------------------------------------------------------------------------
Cash                                                                                                                 700,816
- -----------------------------------------------------------------------------------------------------------------------------
Receivables:
Shares of beneficial interest sold                                                                                 3,543,970
Interest                                                                                                           1,129,573
- -----------------------------------------------------------------------------------------------------------------------------
Other                                                                                                                  4,695
                                                                                                        ---------------------
Total assets                                                                                                     157,023,232

=============================================================================================================================
LIABILITIES 
Payables and other liabilities:
Shares of beneficial interest redeemed                                                                               902,838
Dividends                                                                                                            130,833
Service plan fees                                                                                                     87,362
Transfer and shareholder servicing agent fees                                                                         17,214
Other                                                                                                                 53,052
                                                                                                        ---------------------
Total liabilities                                                                                                  1,191,299

=============================================================================================================================
NET ASSETS                                                                                                      $155,831,933
                                                                                                        =====================

=============================================================================================================================
COMPOSITION OF NET ASSETS
Paid-in capital                                                                                                 $155,854,808
- -----------------------------------------------------------------------------------------------------------------------------
Accumulated net realized loss on investment transactions                                                             (22,875)
- -----------------------------------------------------------------------------------------------------------------------------
Net assets - applicable to 155,854,808 shares of beneficial
interest outstanding                                                                                            $155,831,933
                                                                                                        =====================

=============================================================================================================================
NET ASSET VALUE, REDEMPTION PRICE AND OFFERING PRICE PER SHARE                                                         $1.00

</TABLE>

See accompanying Notes to Financial Statements.

7

<PAGE>

<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENT OF OPERATIONS For the Year Ended June 30, 1998
Centennial California Tax Exempt Trust


<S>                                                                                                               <C>
=============================================================================================================================
INVESTMENT INCOME-Interest                                                                                        $5,773,872

=============================================================================================================================
EXPENSES
Management fees - Note 3                                                                                             801,264
- -----------------------------------------------------------------------------------------------------------------------------
Service plan fees - Note 3                                                                                           320,662
- -----------------------------------------------------------------------------------------------------------------------------
Transfer and shareholder servicing agent fees - Note 3                                                                68,783
- -----------------------------------------------------------------------------------------------------------------------------
Custodian fees and expenses                                                                                           39,178
- -----------------------------------------------------------------------------------------------------------------------------
Shareholder reports                                                                                                   24,979
- -----------------------------------------------------------------------------------------------------------------------------
Registration and filing fees                                                                                          14,378
- -----------------------------------------------------------------------------------------------------------------------------
Legal, auditing and other professional fees                                                                           11,100
- -----------------------------------------------------------------------------------------------------------------------------
Trustees' fees and expenses                                                                                            2,193
- -----------------------------------------------------------------------------------------------------------------------------
Other                                                                                                                  3,328
                                                                                                        ---------------------
Total expenses                                                                                                     1,285,865
Less assumption of expenses by Centennial Asset Management
Corporation - Note 3                                                                                                  (2,862)
Less expenses paid indirectly - Note 3                                                                               (21,684)
                                                                                                        ---------------------
Net expenses                                                                                                       1,261,319

=============================================================================================================================
NET INVESTMENT INCOME                                                                                              4,512,553

=============================================================================================================================
NET REALIZED LOSS ON INVESTMENTS                                                                                     (19,307)

=============================================================================================================================
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS                                                              $4,493,246
                                                                                                        =====================

</TABLE>


<TABLE>
<CAPTION>
=============================================================================================================================
STATEMENTS OF CHANGES IN NET ASSETS


                                                                                           Year Ended June 30,
                                                                                           1998                 1997
<S>                                                                                        <C>                  <C>
=============================================================================================================================
OPERATIONS
Net investment income                                                                        $4,512,553           $3,586,720
- -----------------------------------------------------------------------------------------------------------------------------
Net realized loss                                                                               (19,307)              (3,568)
                                                                                   ------------------------------------------
Net increase in net assets resulting from operations                                          4,493,246            3,583,152

=============================================================================================================================
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS                                                  (4,512,553)          (3,588,347)

=============================================================================================================================
BENEFICIAL INTEREST TRANSACTIONS
Net increase in net assets resulting from
beneficial interest transactions - Note 2                                                    23,912,099           13,106,174

=============================================================================================================================
NET ASSETS
Total increase                                                                               23,892,792           13,100,979
- -----------------------------------------------------------------------------------------------------------------------------
Beginning of period                                                                         131,939,141          118,838,162
                                                                                   ------------------------------------------
End of period                                                                              $155,831,933         $131,939,141
                                                                                   ==========================================

</TABLE>

See accompanying Notes to Financial Statements.

8

<PAGE>

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------------
FINANCIAL HIGHLIGHTS
Centennial California Tax Exempt Trust


                                                 Year Ended June 30,
                                                 -------------------------------------------------------------------------
                                                       1998         1997          1996           1995           1994
<S>                                                    <C>          <C>           <C>            <C>            <C>
==========================================================================================================================
PER SHARE OPERATING DATA
Net asset value, beginning of period                      $1.00        $1.00         $1.00         $1.00          $1.00
- --------------------------------------------------------------------------------------------------------------------------
Income from investment operations - net
investment income and net realized gain                     .03          .03           .03           .03            .02
Dividends and distributions to shareholders                (.03)        (.03)         (.03)         (.03)          (.02)
- --------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period                            $1.00        $1.00         $1.00         $1.00          $1.00
                                                 =========================================================================

==========================================================================================================================
TOTAL RETURN(1)                                            2.86%        2.81%         2.97%         3.00%          1.82%
==========================================================================================================================
RATIOS/SUPPLEMENTAL DATA
Net assets, end of period (in thousands)               $155,832     $131,939      $118,838       $92,318        $60,376
- --------------------------------------------------------------------------------------------------------------------------
Average net assets (in thousands)                      $160,317     $129,087      $112,911       $71,278        $65,520
- --------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:
Net investment income                                      2.81%        2.78%         2.94%         2.99%          1.79%
Expenses, before voluntary assumption
by the Manager(2)                                          0.80%        0.82%         0.80%         0.83%          0.87%
Expenses, net of voluntary assumption
by the Manager                                             0.79%        0.80%         0.79%         0.80%          0.80%

</TABLE>


1.  Assumes a  hypothetical  initial  investment  on the business day before the
first day of the fiscal  period,  with all  dividends  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.  Total returns reflect
changes in net investment  income only. 
2. Beginning in fiscal 1995, the expense ratio reflects the effect of gross 
expenses paid indirectly by the Trust.  Prior year expense ratios have not been
adjusted.


See accompanying Notes to Financial Statements.

9

<PAGE>



                                                                 

NOTES TO FINANCIAL STATEMENTS
Centennial California Tax Exempt Trust


1.  SIGNIFICANT ACCOUNTING POLICIES
Centennial  California  Tax Exempt  Trust (the  Trust) is  registered  under the
Investment  Company Act of 1940,  as  amended,  as a  non-diversified,  open-end
management  investment company.  The Trust's investment objective is to seek the
maximum  current  interest  income exempt from Federal and  California  personal
income taxes for  individual  investors as is consistent  with  preservation  of
capital.   The  Trust's   investment  advisor  is  Centennial  Asset  Management
Corporation  (the Manager),  a subsidiary of  OppenheimerFunds,  Inc. (OFI). The
following is a summary of significant  accounting policies consistently followed
by the Trust.

INVESTMENT VALUATION.  Portfolio securities are valued on the basis of amortized
cost, which approximates market value.

FEDERAL  TAXES.  The Trust 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 to  shareholders.  Therefore,  no federal
income or excise tax provision is required.

DISTRIBUTIONS TO SHAREHOLDERS.  The Trust intends to declare  dividends from net
investment  income each day the New York Stock Exchange is open for business and
pay such  dividends  monthly.  To effect its policy of  maintaining  a net asset
value of $1.00 per share, the Trust may withhold dividends or make distributions
of net realized gains.

OTHER. Investment transactions are accounted for on the date the investments are
purchased or sold (trade date).  Realized  gains and losses on  investments  are
determined on an identified cost basis, which is the same basis used for federal
income tax purposes.  The Trust  concentrates its investments in California and,
therefore,  may have more credit  risks  related to the economic  conditions  of
California than a portfolio with a broader geographical diversification.

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  Trust  has  authorized  an  unlimited  number  of no par  value  shares  of
beneficial  interest.  Transactions  in shares of  beneficial  interest  were as
follows:
<TABLE>
<CAPTION>
                                                   Year Ended June 30, 1998               Year Ended June 30, 1997
                                                   Shares            Amount               Shares            Amount
<S>                                                 <C>              <C>                    <C>             <C>
Sold                                                 587,035,412     $ 587,035,412           400,712,797    $ 400,712,797
Dividends and distributions reinvested                 4,414,987         4,414,987             3,470,265        3,470,265
Redeemed                                            (567,538,300)     (567,538,300)         (391,076,888)    (391,076,888)
                                                   --------------   ---------------      ----------------  ---------------
Net increase                                          23,912,099     $  23,912,099            13,106,174    $  13,106,174
                                                   ==============    ==============       ===============   =============


</TABLE>




3.  MANAGEMENT FEES AND OTHER TRANSACTIONS WITH AFFILIATES
Management  fees paid to the  Manager  were in  accordance  with the  investment
advisory agreement with the Trust which provides for a fee of 0.50% of the first
$250 million of net assets; 0.475% of the next $250 million of net assets; 0.45%
of the next $250  million of net assets;  0.425% of the next $250 million of net
assets  and  0.40% of net  assets  in  excess of $1  billion.  The  Manager  has
voluntarily  undertaken  to assume Trust  expenses in excess of 0.80% of average
annual net assets.

Shareholder  Services,  Inc.  (SSI),  a  subsidiary  of OFI, is the transfer and
shareholder  servicing agent for the Trust and for other  registered  investment
companies. SSI's total costs of providing such services are allocated ratably to
these companies.

Expenses paid indirectly represent a reduction of custodian fees for earnings on
cash balances maintained by the Trust.

Under an approved plan of distribution,  the Trust may expend up to 0.20% of its
net assets annually to reimburse the Manager, as distributor, for costs incurred
in connection  with the personal  service and  maintenance of accounts that hold
shares of the Trust, including amounts paid to brokers, dealers, banks and other
institutions.

10

<PAGE>



INDEPENDENT AUDITORS' REPORT
Centennial California Tax Exempt Trust

The Board of Trustees and Shareholders of
Centennial California Tax Exempt Trust:

We have audited the accompanying statement of assets and liabilities,  including
the statement of  investments,  of Centennial  California Tax Exempt Trust as of
June 30, 1998, the related  statement of operations for the year then ended, the
statements  of changes in net assets for the years ended June 30, 1998 and 1997,
and the financial highlights for the period July 1, 1993 to June 30, 1998. These
financial  statements  and financial  highlights are the  responsibility  of the
Trust'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 at June 30,
1998 by correspondence with the custodian.  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  Centennial
California Tax Exempt Trust at June 30, 1998, 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
July 22, 1998


11


<PAGE>



FEDERAL INCOME TAX INFORMATION (Unaudited)
Centennial California Tax Exempt Trust


In early 1999, shareholders will receive information regarding all dividends and
distributions  paid to them by the Trust during calendar year 1998.  Regulations
of the U.S. Treasury  Department require the Trust to report this information to
the Internal Revenue Service.

None of the  dividends  paid by the Trust  during the fiscal year ended June 30,
1998 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 Trust 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.

12
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CENTENNIAL CALIFORNIA TAX EXEMPT TRUST

OFFICERS AND TRUSTEES
James C. Swain, Chairman and Chief Executive Officer
Bridget A. Macaskill, Trustee and President
Robert G. Avis, Trustee
William A. Baker, Trustee
Charles Conrad, Jr., Trustee
Jon S. Fossel, Trustee
Sam Freedman, Trustee
Raymond J. Kalinowski, Trustee
C. Howard Kast, Trustee
Robert M. Kirchner, Trustee
Ned M. Steel, Trustee
George C. Bowen, Trustee, Vice President, Treasurer and Assistant Secretary
Andrew J. Donohue, Vice President and Secretary
Michael J. Carbuto, Vice President
Robert J. Bishop, Assistant Treasurer
Scott T. Farrar, Assistant Treasurer
Robert G. Zack, Assistant Secretary

INVESTMENT ADVISOR AND DISTRIBUTOR
Centennial Asset Management Corporation

TRANSFER AND SHAREHOLDER SERVICING AGENT
Shareholder Services, Inc.

CUSTODIAN OF PORTFOLIO SECURITIES
Citibank, N.A.

INDEPENDENT AUDITORS
Deloitte & Touche LLP

LEGAL COUNSEL
Myer, Swanson, Adams & Wolf, P.C.

This is a copy of a report to shareholders  of Centennial  California Tax Exempt
Trust. This report must be preceded or accompanied by a Prospectus of Centennial
California Tax Exempt Trust. For material information  concerning the Trust, see
the Prospectus.

For shareholder servicing, call:
1-800-525-9310 (in U.S.)
303-768-3200 (outside U.S.)

Or write:
Shareholder Services, Inc.
P.O. Box 5143
Denver, CO 80217-5143


RA0180.001.0698



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