OPPENHEIMER TAX EXEMPT BOND FUND
N-30D, 1994-06-06
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<PAGE>


                    OPPENHEIMER INSURED TAX-EXEMPT BOND FUND
                              SEMI-ANNUAL REPORT MARCH 31, 1994


[logo]


"WE NEED TAX-FREE INCOME FROM OUR INVESTMENTS.

"OPPENHEIMER'S INSURED MUNICIPAL BOND FUND HAS GIVEN US THE INCOME WE NEED TO DO
THE THINGS WE ENJOY."

<PAGE>

FUND FACTS



- - --------------------------------------------------------------------------------
          FIVE FACTS EVERY SHAREHOLDER SHOULD KNOW ABOUT
          OPPENHEIMER INSURED TAX-EXEMPT BOND FUND
          ----------------------------------------------------------------------
1         The Fund seeks current income exempt from federal income tax through
          investments in insured municipal bonds, which are insured against risk
          of default.
          ----------------------------------------------------------------------
2         During the six-month period ended 3/31/94, the Fund's total return at
          net asset value was -5.62% for Class A shares and -5.94% for Class B
          shares.(2)
          ----------------------------------------------------------------------
3         The value of tax-free income has increased under the new higher
          federal tax rates. The table shows the taxable equivalent yield needed
          to match the Fund's standardized yield for the new top tax brackets.*

<TABLE>
<CAPTION>

                                   Here is the taxable equivalent of the
                                   Fund's yield for an investor in the:
          ---------------------------------------------------------------------
                    Fund Yield     31% Federal    36% Federal    39.6% Federal
                    on 3/31/94     Tax Bracket    Tax Bracket    Tax Bracket
          ---------------------------------------------------------------------
          <S>       <C>            <C>            <C>            <C>
          Class A   4.54%(1)       6.58%          7.09%          7.52%
          Class B   3.94%(1)       5.71%          6.16%          6.52%

        <FN>
        * This table assumes that an investor's highest tax bracket applies to
          the change in taxable income resulting from a switch between taxable
          and non-taxable investments. A portion of the Fund's distributions may
          be subject to federal and/or state income taxes. For investors subject
          to alternative minimum tax, a portion of the Fund's distributions may
          increase that tax.

</TABLE>

          ----------------------------------------------------------------------
4         The Fund's average annual total returns for Class A shares for the 1-
          and 5-year periods ended 3/31/94 and since inception on 11/11/86 were
          -3.39%, 7.34% and 6.46%, respectively.(3)
          ----------------------------------------------------------------------
5         "The bonds in the Fund's portfolio are insured by a number of
          highly-rated, well-financed companies including Municipal Bond
          Investors Assurance Corp. (MBIA), American Municipal Bond Assurance
          Corp. (AMBAC) and Financial Guarantee Insurance Corp. (FGIC). These
          private firms provide assurance against default of payment of interest
          and principal by the issuing municipality or government agency."
                               PORTFOLIO MANAGER ROBERT PATTERSON MARCH 31, 1994



IN THIS REPORT:

ANSWERS TO THREE TIMELY QUESTIONS YOU SHOULD ASK YOUR FUND'S MANAGERS.

/ / HOW HAS THE RECENT INCREASE IN INTEREST RATES AFFECTED THE FUND?

/ / WHAT COMPANIES INSURE THE BONDS IN THE FUND'S PORTFOLIO?

/ / WHAT IS YOUR OUTLOOK FOR THE MUNICIPAL BOND MARKET FOR THE REMAINDER OF
1994?

GET THE FACTS ABOUT BONDS AND BOND MUTUAL FUNDS. CALL 1-800-525-7048 FOR YOUR
FREE COPY OF OPPENHEIMERFUNDS "FACTS ABOUT BOND FUNDS" BROCHURE.



1. Standardized yield is net investment income calculated on a yield-to-maturity
basis for the 30-day period ended 3/31/94, divided by the maximum offering price
for Class A shares at the end of the period, compounded semi-annually and then
annualized. Falling net asset values will tend to artificially raise yields.

2. Based on the change in net asset value per Class A share from 9/30/93 and
3/31/93 to 3/31/94, without considering sales charges. Total return for Class B
shares from 5/3/93 (inception of class) and held until 3/31/94 was -5.25%. This
reflects the change in value of a hypothetical investment made on 5/3/93 and
held until 3/31/94, after applying the contingent deferred sales charge of 5%.
During a portion of the period(s) for which total return information is
depicted, the Fund's investment advisor assumed or waived some of the Fund's
expenses. Without that expense assumption or waiver, which is no longer in
effect, the total returns for those periods would have been less.

3. Average annual total return is based on a hypothetical investment held until
3/31/94, after deducting the maximum initial sales charge of 4.75%  for Class A
shares.

All total return figures assume reinvestment of dividends and capital gains
distributions.

Past performance is not indicative of future results. Investment return and
principal value will fluctuate so that an investor's shares, when redeemed, may
be worth more or less than the original cost. The value of the Fund's shares is
not insured.



2  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

REPORT TO SHAREHOLDERS



- - --------------------------------------------------------------------------------
Oppenheimer Insured Tax-Exempt Bond Fund produced a high level of tax-free
income during the six-month period ended March 31, 1994. The Fund's standardized
yield was 4.54% for Class A shares and 3.94% for Class B shares for the 30-day
period ended March 31, 1994.(4)
          The U.S. municipal bond market's stellar performance over the past two
years was interrupted in February and March of this year as increases in
interest rates created volatility in the markets. As the U.S. economy is
strengthening, the Federal Reserve raised short-term interest rates as a
pre-emptive strike against inflation. In general, when interest rates increase,
bond prices decrease. Thus, the interest rate increases caused the prices of
municipal bonds to decline.
          In anticipation of changing interest rates, your Fund's managers made
several moves late last year and early in 1994 to make the Fund less sensitive
to interest rate increases. The most important was to concentrate a higher
portion of the Fund's assets in intermediate-term bonds because they are less
sensitive to rate changes. This strategy reduced the impact on the Fund when
rising rates drove down prices more significantly in long-term bonds than in
intermediate-term bonds.
          During the past six months, the portfolio continued to enjoy an
attractive yield due to the higher yields on insured bonds compared to uninsured
bonds of the same quality. We continued our strategy of using call protection to
lock in rates on higher-yielding securities in order to maintain income for the
Fund. Call protection prevents issuers from calling or redeeming bonds before
maturity.
          The Fund's portfolio is diversified by market sector and by state, and
remains focused on essential service bonds from states with higher taxes and
high demand for tax-free bonds such as New York, Michigan and Pennsylvania.
Essential service bonds are backed by predictable income streams, such as
utility revenues or transportation tolls. New purchases include Austin, Texas
Utility and Suffolk County, New York Southwest Sewer.(6)
          Going forward, we believe the market setback was not unusual after the
prolonged period of strong performance, and that it presents attractive buying
opportunities in the near term.
          We appreciate the confidence you have placed in the Fund, and look
forward to serving your investment needs in the future.



AFTER-TAX YIELD ADVANTAGE

As of March 31, 1994

<TABLE>
<CAPTION>

                                                       BEFORE    AFTER
                                                       TAXES     TAXES*
- - -----------------------------------------------------------------------
<S>                                                    <C>       <C>
Oppenheimer Insured Tax-Exempt Bond Fund Class A
standardized yield(4)                                  4.54%     4.54%
- - -----------------------------------------------------------------------
Oppenheimer Insured Tax-Exempt Bond Fund Class B
standardized yield(4)                                  3.94%     3.94%
- - -----------------------------------------------------------------------
Average money market fund rate(5)                      2.30%     1.47%
- - -----------------------------------------------------------------------
Average rate for one-year CDs(5)                       3.13%     2.00%

<FN>
*After-tax figures assume a 36% effective tax bracket applies to the change in
taxable income resulting from a switch between taxable and non-taxable
investments. A portion of the Fund's distributions may be subject to federal
and/or state income tax. For investors subject to alternative minimum tax, a
portion of the Fund's distributions may increase that tax.

</TABLE>

/s/ James C. Swain                      /s/ Jon S. Fossel

James C. Swain, Chairman                Jon S. Fossel, President
Oppenheimer Tax-Exempt Bond Fund        Oppenheimer Tax-Exempt Bond Fund
for Oppenheimer Insured                 for Oppenheimer Insured
Tax-Exempt Bond Fund                    Tax-Exempt Bond Fund

April 25, 1994



4. See footnote 1, page 2.

5. Source of data: BANK RATE MONITOR, 3/31/94. The CD rate is an average rate of
12-month certificates of deposit available for purchase from 10 regional banks
on 3/31/94. The average money market fund rate is the average rate for the
30-day period ended 3/31/94 for 10 selected money market mutual funds. CDs are
insured by the FDIC and may provide a guaranteed return, and money market funds
provide stability of principal, whereas the Fund's yield and share value may
fluctuate and are not insured by the FDIC or by the companies that insure bonds
held in the Fund's portfolio.

6. The Fund's portfolio is subject to change.



3  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

STATEMENT OF INVESTMENTS  March 31, 1994 (Unaudited)

<TABLE>
<CAPTION>

                                                                                   RATINGS: MOODY'S/     FACE         MARKET VALUE
                                                                                   S&P'S/FITCH'S         AMOUNT       SEE NOTE 1
- - ----------------------------------------------------------------------------------------------------------------------------------
- - ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                <C>                   <C>          <C>
MUNICIPAL BONDS AND NOTES-101.1%
- - ----------------------------------------------------------------------------------------------------------------------------------
ALABAMA-1.4%             Pelham, Alabama General Obligation Warrants,
                         AMBAC Insured, 7.10%, 8/1/15                              Aaa/AAA               $1,000,000     $1,084,172
- - ----------------------------------------------------------------------------------------------------------------------------------
ALASKA-0.7%              Alaska Energy Authority Power Revenue Bonds,
                         Bradley Lake Hydroelectric Project, Series 2,
                         MBIA Insured, 7.25%, 7/1/21                               Aaa/AAA                  500,000        541,747
- - ----------------------------------------------------------------------------------------------------------------------------------
CALIFORNIA-13.1%         California Public Capital Improvements Financing
                         Authority Revenue Bonds, Pooled Project, Series B,
                         BIG Insured, 8.10%, 3/1/18                                Aaa/AAA                  240,000        260,898
                         ---------------------------------------------------------------------------------------------------------
                         California State General Obligation Bonds,
                         FSA Insured, 5.50%, 4/1/19                                Aaa/AAA                2,235,000      2,006,223
                         ---------------------------------------------------------------------------------------------------------
                         California State Public Works Board Lease Revenue
                         Bonds, Department of Corrections California State
                         Prison, Series B, MBIA Insured, 5.50%, 12/1/12            Aaa/AAA/A+             2,400,000      2,235,554
                         ---------------------------------------------------------------------------------------------------------
                         Los Angeles, California Waste-Water System
                         Revenue Refunding Bonds, Series A, MBIA Insured,
                         5.70%, 6/1/20                                             Aaa/AAA/A+             1,000,000        922,254
                         ---------------------------------------------------------------------------------------------------------
                         Los Angeles County, California Metropolitan
                         Transportation Authority Sales Tax Revenue
                         Refunding Bonds, Series A, MBIA Insured,
                         5.625%, 7/1/18                                            Aaa/AAA/A+             1,500,000      1,372,172
                         ---------------------------------------------------------------------------------------------------------
                         Sacramento, California Municipal Utility District
                         Electric Revenue Refunding Bonds:
                         Series B, FGIC Insured, 9.73%, 8/15/18(1)                 Aaa/AAA/AAA            1,000,000      1,016,614
                         Series D, MBIA Insured, 5.25%, 11/15/20                   Aaa/AAA/A-             1,500,000      1,296,110
                         ---------------------------------------------------------------------------------------------------------
                         San Jose, California Redevelopment Agency Tax
                         Allocation Bonds, Merged Area Redevelopment
                         Project, MBIA Insured, 5.25%, 8/1/16                      Aaa/AAA/A              1,000,000        879,295
                                                                                                                        ----------
                                                                                                                         9,989,120
- - ----------------------------------------------------------------------------------------------------------------------------------
COLORADO-2.2%            Colorado Health Facilities Authority Revenue Bonds:
                         PSL Health System Project, Series A, FSA Insured,
                         7.25%, 2/15/16                                            Aaa/AAA                  500,000        546,720
                         ---------------------------------------------------------------------------------------------------------
                         Rose Medical Center, Prerefunded, MBIA Insured,
                         7%, 8/15/21                                               Aaa/AAA                  500,000        561,390
                         ---------------------------------------------------------------------------------------------------------
                         Poudre Valley, Colorado Hospital District Hospital
                         Revenue Bonds, AMBAC Insured, 6.625%, 12/1/11             Aaa/AAA                  500,000        547,800
                                                                                                                        ----------
                                                                                                                         1,655,910
- - ----------------------------------------------------------------------------------------------------------------------------------
FLORIDA-0.7%             Alachua County, Florida Library District General
                         Obligation Refunding Bonds, MBIA Insured,
                         6.25%, 8/1/17                                             Aaa/AAA                  250,000        254,571
                         ---------------------------------------------------------------------------------------------------------
                         Escambia County, Florida Utilities Authority
                         Revenue Refunding Bonds, Utility System,
                         Prerefunded, FGIC Insured, 7.625%, 1/1/07                 Aaa/AAA/AAA              250,000        278,058
                                                                                                                        ----------
                                                                                                                           532,629
- - ----------------------------------------------------------------------------------------------------------------------------------
GEORGIA-1.3%             Fulton De Kalb, Georgia Hospital Authority Revenue
                         Certificates, Prerefunded, Series A, AMBAC
                         Insured, 7.25%, 1/1/20                                    Aaa/AAA                  900,000      1,008,852



4  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

<CAPTION>

                                                                                   RATINGS: MOODY'S/     FACE         MARKET VALUE
                                                                                   S&P'S/FITCH'S         AMOUNT       SEE NOTE 1
<S>                                                                                <C>                   <C>          <C>
- - ----------------------------------------------------------------------------------------------------------------------------------
HAWAII-2.6%              Hawaii State Airport System Revenue Refunding
                         Bonds, Third Series, AMBAC Insured, 5.60%, 7/1/06         Aaa/AAA               $2,000,000     $1,975,410
- - ----------------------------------------------------------------------------------------------------------------------------------
ILLINOIS-4.6%            Cook County, Illinois Community College District
                         No. 508 Certificates of Participation:
                         Lease Certificates, Series C, MBIA Insured,
                         7.70%, 12/1/07                                            Aaa/AAA                2,500,000      2,905,022
                         FGIC Insured, 8.75%, 1/1/05                               Aaa/AAA/AAA              500,000        622,624
                                                                                                                        ----------
                                                                                                                         3,527,646
- - ----------------------------------------------------------------------------------------------------------------------------------
INDIANA-6.2%             Fort Wayne, Indiana Hospital Authority Revenue
                         Bonds, Parkview Memorial Hospital Project,
                         Series A, FGIC Insured, 7.50%, 11/15/11                   Aaa/AAA/AAA              250,000        270,736
                         ---------------------------------------------------------------------------------------------------------
                         Hamilton Southeastern, Indiana Consolidated School
                         Building Corp. Revenue Refunding Bonds, Fst. Mtg.,
                         AMBAC Insured, 7%, 7/1/11                                 Aaa/AAA                  500,000        533,941
                         ---------------------------------------------------------------------------------------------------------
                         Indiana Health Facilities Financing Authority
                         Hospital Revenue Bonds, Community Hospital
                         of Indiana, MBIA Insured, 7%, 7/1/21                      Aaa/AAA                  500,000        535,403
                         ---------------------------------------------------------------------------------------------------------
                         Indiana State Office Building Revenue Bonds,
                         Commission Capital Complex, Series B,
                         MBIA Insured, 7.40%, 7/1/15                               Aaa/AAA                2,500,000      2,848,092
                         ---------------------------------------------------------------------------------------------------------
                         Whitko, Indiana Middle School Building Corp.
                         Revenue Bonds, Fst. Mtg., AMBAC Insured,
                         6.75%, 7/15/12                                            Aaa/AAA                  500,000        524,483
                                                                                                                        ----------
                                                                                                                         4,712,655
- - ----------------------------------------------------------------------------------------------------------------------------------
KANSAS-0.7%              Burlington, Kansas Pollution Control Revenue
                         Refunding Bonds, Kansas Gas and Electric Co.
                         Project, MBIA Insured, 7%, 6/1/31                         Aaa/AAA                  500,000        532,555
- - ----------------------------------------------------------------------------------------------------------------------------------
MASSACHUSETTS-4.1%       Massachusetts State Health and Educational
                         Facilities Authority Revenue Bonds, Northeastern
                         University, Series E, 6.55%, 10/1/22                      Aaa/AAA                3,000,000      3,094,167
- - ----------------------------------------------------------------------------------------------------------------------------------
MICHIGAN-3.7%            Detroit, Michigan Sewage Disposal System Revenue
                         Refunding Bonds, FGIC Insured, 8.33%, 7/1/23(1)           Aaa/AAA/AAA            2,000,000      1,750,028
                         ---------------------------------------------------------------------------------------------------------

                         Michigan Municipal Board Authority Revenue Bonds,
                         Local Government, Group 19, AMBAC Insured,
                         7.50%, 11/1/09                                            Aaa/AAA                  250,000        275,932
                         ---------------------------------------------------------------------------------------------------------
                         Sault Sainte Marie, Michigan General Obligation
                         Bonds, AMBAC Insured, 7.50%, 9/1/10                       Aaa/AAA                  250,000        283,174
                         ---------------------------------------------------------------------------------------------------------
                         Western Townships, Michigan Utilities Authority
                         General Obligation Refunding Bonds, Sewerage
                         Disposal Systems Project, CGIC Insured,
                         6.50%, 1/1/19                                             Aaa/AAA                  500,000        515,254
                                                                                                                        ----------
                                                                                                                         2,824,388

- - ----------------------------------------------------------------------------------------------------------------------------------
NEBRASKA-0.7%            Nebraska Investment Finance Authority Hospital
                         Revenue Bonds, Nebraska Methodist Health System,
                         MBIA Insured, 7%, 3/1/06                                  Aaa/AAA                  500,000        537,818



5  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

<CAPTION>

                                                                                   RATINGS: MOODY'S/     FACE         MARKET VALUE
                                                                                   S&P'S/FITCH'S         AMOUNT       SEE NOTE 1
<S>                                                                                <C>                   <C>          <C>
- - ----------------------------------------------------------------------------------------------------------------------------------
NEVADA-4.3%              Clark County, Nevada School District General
                         Obligation Bonds, Series B, MBIA Insured, 6.75%,
                         3/1/08                                                    Aaa/AAA               $2,000,000    $ 2,116,822
                         ---------------------------------------------------------------------------------------------------------
                         Humboldt County, Nevada Pollution Control
                         Revenue Bonds, Idaho Power Co. Project,
                         AMBAC Insured, 8.30%, 12/20/14                            Aaa/AAA                1,000,000      1,175,541
                                                                                                                        ----------
                                                                                                                         3,292,363
- - ----------------------------------------------------------------------------------------------------------------------------------
NEW HAMPSHIRE-0.7%       New Hampshire Turnpike System Revenue Refunding
                         Bonds, Series A, FGIC Insured, 6.75%, 11/1/11             Aaa/AAA/AAA              500,000        539,111
- - ----------------------------------------------------------------------------------------------------------------------------------
NEW JERSEY-2.3%          Bergen County, New Jersey Utilities Authority
                         Water Pollution Control Revenue Bonds, Series A,
                         FGIC Insured, 6.50%, 12/15/12                             Aaa/AAA/AAA              500,000        517,659
                         ---------------------------------------------------------------------------------------------------------
                         East Orange, New Jersey General Obligation Bonds,
                         FSA Insured, 8.40%, 8/1/06                                Aaa/AAA                1,000,000      1,216,752
                                                                                                                        ----------
                                                                                                                         1,734,411
- - ----------------------------------------------------------------------------------------------------------------------------------
NEW YORK-18.3%           Dormitory Authority of the State of New York
                         Revenue Bonds, Manhattan College, Asset Guaranty
                         Insured, 6.50%, 7/1/19                                    NR/AA                  1,000,000      1,012,551
                         ---------------------------------------------------------------------------------------------------------
                         New York City Municipal Water Finance Authority:
                         Revenue Bonds, Water and Sewer System:
                         Series B, AMBAC Insured, 5.375%, 6/15/19                  Aaa/AAA/A              2,805,000      2,487,022
                         Series C, AMBAC Insured, 6.20%, 6/15/21                   Aaa/AAA                1,500,000      1,484,271
                         Revenue Refunding Bonds, Water and Sewer
                         System, Series F, AMBAC Insured, 5.50%, 6/15/11           Aaa/AAA/A              2,000,000      1,869,002
                         ---------------------------------------------------------------------------------------------------------
                         New York State Medical Care Facilities Finance
                         Agency Revenue Bonds, Mental Health Services
                         Facilities Improvement Project:
                         Prerefunded, Series A, MBIA Insured, 7.75%, 8/15/10       Aaa/AAA                  625,000        702,111
                         Prerefunded, Series B, CGIC Insured, 7.875%, 8/15/15      Aaa/AAA                  500,000        558,097
                         ---------------------------------------------------------------------------------------------------------
                         New York State Urban Development Corp. Revenue
                         Refunding Bonds, Correctional Facilities Capital
                         Project, Series A, FSA Insured, 5.25%, 1/1/14             Aaa/AAA/A              3,115,000      2,790,090
                         ---------------------------------------------------------------------------------------------------------
                         Suffolk County, New York Industrial Development
                         Authority Revenue Bonds, Southwest Sewer System,
                         FGIC Insured, 6%, 2/1/07                                  Aaa/AAA/AAA            2,000,000      2,026,622
                         ---------------------------------------------------------------------------------------------------------
                         Suffolk County, New York Water Authority Revenue
                         Bonds, Waterworks Project, MBIA Insured, 5%, 6/1/12       Aaa/AAA                1,250,000      1,097,656
                                                                                                                        ----------
                                                                                                                        14,027,422
- - ----------------------------------------------------------------------------------------------------------------------------------
NORTH CAROLINA-2.4%      North Carolina Municipal Power Agency Electric
                         Revenue Refunding Bonds, No. 1 Catawba, FSA
                         Insured, 6.20%, 1/1/18                                    Aaa/AAA                1,800,000      1,811,012
- - ----------------------------------------------------------------------------------------------------------------------------------
OHIO-1.5%                Clermont County, Ohio Sewer System Revenue
                         Bonds, Prerefunded, AMBAC Insured, 7.375%, 12/1/20        Aaa/AAA                  250,000        285,307
                         ---------------------------------------------------------------------------------------------------------
                         Streetsboro, Ohio City School District General
                         Obligation Bonds, AMBAC Insured, 7.125%, 12/1/10          Aaa/AAA                  500,000        561,825
                         ---------------------------------------------------------------------------------------------------------
                         Toledo, Ohio Sewer System Revenue Refunding
                         Bonds, Mtg. Program, MBIA Insured, 7.375%, 11/15/10       Aaa/AAA                  250,000        274,983
                                                                                                                        ----------
                                                                                                                         1,122,115



6  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

<CAPTION>

                                                                                   RATINGS: MOODY'S/     FACE         MARKET VALUE
                                                                                   S&P'S/FITCH'S         AMOUNT       SEE NOTE 1
<S>                                                                                <C>                   <C>          <C>
- - ----------------------------------------------------------------------------------------------------------------------------------
OKLAHOMA-3.2%            Grove, Oklahoma Municipal Services Authority
                         Utility and Sales Tax Revenue Bonds, Series 1991,
                         CGIC Insured, 7%, 2/1/16                                  Aaa/AAA               $1,115,000    $ 1,183,405
                         ---------------------------------------------------------------------------------------------------------
                         Norman, Oklahoma Regional Hospital Authority
                         Revenue Bonds, MBIA Insured, 6.90%, 9/1/21                Aaa/AAA                  500,000        521,389
                         ---------------------------------------------------------------------------------------------------------
                         Oklahoma Baptist University Authority Revenue
                         Bonds, FGIC Insured, 7.10%, 8/1/09                        Aaa/AAA/AAA              150,000        161,031
                         ---------------------------------------------------------------------------------------------------------
                         Tulsa, Oklahoma Airports Improvement Trust
                         Consolidated General Revenue Bonds,
                         MBIA Insured, 7.50%, 6/1/08                               Aaa/AAA                  500,000        543,752
                                                                                                                        ----------
                                                                                                                         2,409,577
- - ----------------------------------------------------------------------------------------------------------------------------------
PENNSYLVANIA-14.3%       Allegheny County, Pennsylvania Hospital
                         Development Authority Revenue Bonds, Presbyterian
                         University Hospital, Series A, MBIA Insured,
                         7.60%, 3/1/08                                             Aaa/AAA                1,400,000      1,519,197
                         ---------------------------------------------------------------------------------------------------------
                         Berks County, Pennsylvania General Obligation
                         Bonds, FGIC Insured, 10.798%, 11/15/20(1)                 Aaa/AAA                1,000,000      1,121,743
                         ---------------------------------------------------------------------------------------------------------
                         Butler County, Pennsylvania Hospital Authority
                         Revenue Bonds, North Hills Passavant Hospital,
                         Series A, CGIC Insured, 7%, 6/1/22                        Aaa/AAA                  200,000        214,944
                         ---------------------------------------------------------------------------------------------------------
                         Northampton County, Pennsylvania Higher Education
                         Authority Revenue Bonds, Lehigh University
                         Project, MBIA Insured, 6.90%, 10/15/06                    Aaa/AAA                2,000,000      2,179,262
                         ---------------------------------------------------------------------------------------------------------
                         Pennsylvania Intergovernmental Cooperative
                         Authority Special Tax Revenue Refunding Bonds,
                         City of Philadelphia Funding Program, MBIA
                         Insured, 5.60%, 6/15/16                                   Aaa/AAA                2,000,000      1,858,400
                         ---------------------------------------------------------------------------------------------------------
                         Pennsylvania State Higher Education Assistance
                         Agency Student Loan Residual Interest Revenue
                         Bonds, Series 1992B, AMBAC Insured, 9.384%, 3/1/22(1)     Aaa/AAA                1,250,000      1,273,097
                         ---------------------------------------------------------------------------------------------------------
                         Philadelphia, Pennsylvania Regional Port Authority
                         Lease Revenue Bonds, MBIA Insured, 9.20%, 9/1/20(1)       Aaa/AAA                1,900,000      2,026,042
                         ---------------------------------------------------------------------------------------------------------
                         Philadelphia, Pennsylvania School District
                         General Obligation Bonds, Series A, MBIA Insured,
                         5.75%, 7/1/07                                             Aaa/AAA                  500,000        498,116
                         ---------------------------------------------------------------------------------------------------------
                         Purchase Line, Pennsylvania School District
                         General Obligation Bonds, Series 1990, MBIA
                         Insured, 7.30%, 1/15/11                                   Aaa/AAA                  250,000        277,268
                                                                                                                        ----------
                                                                                                                        10,968,069
- - ----------------------------------------------------------------------------------------------------------------------------------
SOUTH CAROLINA-1.1%      Florence County, South Carolina School District
                         No. 003 Certificates of Participation, Series B,
                         CGIC Insured, 7%, 1/1/11                                  Aaa/AAA                  310,000        330,073
                         ---------------------------------------------------------------------------------------------------------
                         Sumter County, South Carolina School District
                         No. 017 Certificates of Participation, Series A,
                         CGIC Insured, 7.125%, 1/1/11                              Aaa/AAA                  500,000        544,928
                                                                                                                        ----------
                                                                                                                           875,001



7  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

<CAPTION>

                                                                                   RATINGS: MOODY'S/     FACE         MARKET VALUE
                                                                                   S&P'S/FITCH'S         AMOUNT       SEE NOTE 1
<S>                                                                                <C>                   <C>          <C>
- - ----------------------------------------------------------------------------------------------------------------------------------
TEXAS-4.3%               Austin, Texas Combined Utility Systems Revenue
                         Refunding Bonds:
                         Series A, MBIA Insured, 0%, 11/15/09                      Aaa/AAA               $3,615,000    $ 1,371,733
                         Prerefunded, BIG Insured, 8.625%, 11/15/17                Aaa/AAA                  250,000        304,207
                         ---------------------------------------------------------------------------------------------------------
                         Dallas/Fort Worth, Texas Regional Airport Revenue
                         Bonds, FGIC Insured, 6.50%, 11/1/11                       Aaa/AAA/AAA            1,600,000      1,632,534
                                                                                                                        ----------
                                                                                                                         3,308,474
- - ----------------------------------------------------------------------------------------------------------------------------------
VIRGINIA-1.9%            Norfolk, Virginia Water Revenue Bonds, AMBAC
                         Insured, 5.25%, 11/1/13                                   Aaa/AAA                1,000,000        887,884
                         ---------------------------------------------------------------------------------------------------------
                         Roanoke, Virginia Industrial Development Authority
                         Hospital Revenue Bonds, Roanoke Memorial
                         Hospital Project-Carilion Health, Prerefunded,
                         MBIA Insured, 7.25%, 7/1/10                               Aaa/AAA                  500,000        564,211
                                                                                                                        ----------
                                                                                                                         1,452,095
- - ----------------------------------------------------------------------------------------------------------------------------------
WASHINGTON-1.0%          Washington State Public Power Supply System
                         Revenue Refunding Bonds, Series A, FGIC Insured,
                         0%, 7/1/09                                                Aaa/AAA/AAA            2,000,000        794,060
- - ----------------------------------------------------------------------------------------------------------------------------------
WEST VIRGINIA-1.1%       West Virginia School Building Authority Revenue
                         Bonds, Prerefunded, MBIA Insured, 7.25%, 7/1/15           Aaa/AAA                  750,000        846,316
- - ----------------------------------------------------------------------------------------------------------------------------------
WISCONSIN-1.4%           Wisconsin State Health & Educational Facilities
                         Authority Revenue Bonds:
                         Novus Health Group, Series B, MBIA Insured,
                         6.75%, 12/15/20                                           Aaa/AAA                  500,000        530,248
                         SSM Healthcare Projects, Prerefunded, Series B,
                         MBIA Insured, 7%, 6/1/20                                  Aaa/AAA                  500,000        557,059
                                                                                                                        ----------
                                                                                                                         1,087,307
- - ----------------------------------------------------------------------------------------------------------------------------------
U.S. POSSESSIONS-1.3%    Puerto Rico Commonwealth General Obligation
                         Refunding Bonds, YCNS, FSA Insured, 8.882%, 7/1/20(1)     Aaa/AAA                1,000,000        995,924
                                                                                                                        ----------
                         Total Municipal Bonds and Notes (Cost $78,295,349)                                             77,280,326
- - ----------------------------------------------------------------------------------------------------------------------------------
- - ----------------------------------------------------------------------------------------------------------------------------------
SHORT-TERM TAX-EXEMPT OBLIGATIONS-2.6%
- - ----------------------------------------------------------------------------------------------------------------------------------
                         East Baton Rouge Parish, Louisiana Pollution
                         Control Revenue Refunding Bonds, Exxon Project,
                         3.25%(2)(Cost $2,000,000)                                                        2,000,000      2,000,000
- - ----------------------------------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS, AT VALUE (COST $80,295,349)                                                                103.7%    79,280,326
- - ----------------------------------------------------------------------------------------------------------------------------------
LIABILITIES IN EXCESS OF OTHER ASSETS                                                                          (3.7)    (2,791,971)
                                                                                                        -----------    -----------
NET ASSETS                                                                                                    100.0%   $76,488,355
                                                                                                        -----------    -----------
                                                                                                        -----------    -----------

                         <FN>
                         1. Represents the current interest rate for a variable
                         rate security.

                         2. 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 March 31, 1994. A demand feature allows the recovery
                         of principal at any time, or at specified intervals not
                         exceeding one year, on up to 30 days' notice.

</TABLE>

                         See accompanying Notes to Financial Statements.



8  Oppenheimer Insured Tax-Exempt Bond Fund

<PAGE>

                 ---------------------------------------------------------------
                 STATEMENT OF ASSETS AND LIABILITIES  March 31, 1994 (Unaudited)

<TABLE>
<CAPTION>

- - -------------------------------------------------------------------------------
<S>                 <C>                                                                       <C>
Assets              Investments, at value (cost $80,295,349)-see accompanying statement       $79,280,326
                    -------------------------------------------------------------------------------------
                    Receivables:
                    Interest                                                                    1,118,905
                    Investments sold                                                            1,001,385
                    Shares of beneficial interest sold                                            753,528
                    -------------------------------------------------------------------------------------
                    Other                                                                           6,247
                                                                                               ----------
                    Total assets                                                               82,160,391

- - ---------------------------------------------------------------------------------------------------------
Liabilities         Bank overdraft                                                                669,691
                    -------------------------------------------------------------------------------------
                    Payables and other liabilities:
                    Investments purchased                                                       4,137,456
                    Shares of beneficial interest redeemed                                        563,488
                    Dividends                                                                     216,786
                    Distribution and service plan fees-Note 4                                      49,047
                    Other                                                                          35,568
                                                                                              -----------
                    Total liabilities                                                           5,672,036

- - ---------------------------------------------------------------------------------------------------------
Net Assets                                                                                    $76,488,355
                                                                                              -----------

- - ---------------------------------------------------------------------------------------------------------
Composition of      Paid-in capital                                                           $77,600,675
Net Assets          -------------------------------------------------------------------------------------
                    Undistributed net investment income                                            30,646
                    -------------------------------------------------------------------------------------
                    Accumulated net realized loss from investment transactions                   (127,943)
                    -------------------------------------------------------------------------------------
                    Net unrealized depreciation on investments-Note 3                          (1,015,023)
                    Net assets                                                                $76,488,355

- - ---------------------------------------------------------------------------------------------------------
Net Asset Value     Class A Shares:
Per Share           Net asset value and redemption price per share (based on
                    net assets of $66,780,967 and 4,036,464 shares of beneficial
                    interest outstanding)                                                          $16.54
                    Maximum offering price per share (net asset value plus sales
                    charge of 4.75% of offering price)                                             $17.36

                    -------------------------------------------------------------------------------------
                    Class B Shares:
                    Net asset value, redemption price and offering price per
                    share (based on net assets of $9,707,388 and 586,369 shares
                    of beneficial interest outstanding)                                            $16.56

</TABLE>
                    See accompanying Notes to Financial Statements.


                    9  Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

<TABLE>
<CAPTION>
                    -------------------------------------------------------------------------------------
                    STATEMENT OF OPERATIONS  For the Six Months Ended March 31, 1994 (Unaudited)

- - ---------------------------------------------------------------------------------------------------------
<S>                      <C>                                                                  <C>
Investment Income        Interest                                                              $2,248,625

- - ---------------------------------------------------------------------------------------------------------
Expenses                 Management fees-Note 4                                                   165,635
                         Distribution and service plan fees:
                         Class A-Note 4                                                            82,860
                         Class B-Note 4                                                            36,769
                         --------------------------------------------------------------------------------
                         Transfer and shareholder servicing agent fees-Note 4                      44,696
                         --------------------------------------------------------------------------------
                         Shareholder reports                                                       29,228
                         --------------------------------------------------------------------------------
                         Registration and filing fees:
                         Class A                                                                    3,169
                         Class B                                                                    1,880
                         --------------------------------------------------------------------------------
                         Legal and auditing fees                                                    1,151
                         --------------------------------------------------------------------------------
                         Other                                                                     59,628
                                                                                              -----------
                         Total expenses                                                           425,016

- - ---------------------------------------------------------------------------------------------------------
Net Investment Income                                                                           1,823,609

- - ---------------------------------------------------------------------------------------------------------
Realized and Unrealized  Net realized loss from investments                                       (36,313)
Loss on Investments
                         Net change in unrealized appreciation or depreciation on investments  (6,370,860)
                                                                                              -----------
                         Net realized and unrealized loss on investments                       (6,407,173)

- - ----------------------------------------------------------------------------------------------------------
Net Decrease in Net Assets Resulting From Operations                                          $(4,583,564)
                                                                                              ------------
</TABLE>

                         See accompanying Notes to Financial Statements.

10  Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

<TABLE>
<CAPTION>

                         ---------------------------------------------------------------------------------------------
                         STATEMENTS OF CHANGES IN NET ASSETS

                                                                                                 SIX MONTHS ENDED  YEAR ENDED
                                                                                                 MARCH 31, 1994    SEPTEMBER 30,
                                                                                                 (UNAUDITED)       1993

- - ------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>                                                                       <C>             <C>
OPERATIONS               Net investment income                                                     $ 1,823,609     $ 2,520,182
                         -----------------------------------------------------------------------------------------------------
                         Net realized gain (loss) on investments                                       (36,313)        242,996
                         -----------------------------------------------------------------------------------------------------
                         Net change in unrealized appreciation or depreciation on investments       (6,370,860)      3,653,486
                                                                                                   -----------     -----------
                         Net increase (decrease) in net assets resulting from operations            (4,583,564)      6,416,664

- - ------------------------------------------------------------------------------------------------------------------------------
DIVIDENDS AND            Dividends from net investment income:
DISTRIBUTIONS TO         Class A ($.455 and $.96 per share, respectively)                           (1,700,786)     (2,518,298)
SHAREHOLDERS             Class B ($.384 and $.30 per share, respectively)                             (156,623)        (38,890)
                         ------------------------------------------------------------------------------------------------------
                         Distributions from net realized gain on investments:
                         Class A ($.076 and $.18 per share, respectively)                             (280,275)       (387,637)
                         Class B ($.076 per share)                                                     (29,669)             --

- - ------------------------------------------------------------------------------------------------------------------------------
BENEFICIAL INTEREST      Net increase in net assets resulting from Class A
TRANSACTIONS             beneficial interest transactions--Note 2                                   10,597,588      25,043,911
                         -----------------------------------------------------------------------------------------------------
                         Net increase in net assets resulting from Class B
                         beneficial interest transactions--Note 2                                    5,379,441       4,995,749

- - ------------------------------------------------------------------------------------------------------------------------------
NET ASSETS               Total increase                                                              9,226,112      33,511,499
                         -----------------------------------------------------------------------------------------------------
                         Beginning of period                                                        67,262,243      33,750,744
                                                                                                   -----------     -----------
                         End of period (including undistributed net investment
                         income of $30,646 and $64,446, respectively)                              $76,488,355     $67,262,243
                                                                                                   -----------     -----------
                                                                                                   -----------     -----------
</TABLE>

                         See accompanying Notes to Financial Statements.


11  Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

<TABLE>
<CAPTION>

                                ------------------------------------------------------------------------------
                                FINANCIAL HIGHLIGHTS


                                CLASS A                                                              CLASS B
                                -------------------------------------------------------------------  -------------------------------
                                SIX MONTHS ENDED  YEAR ENDED                                         SIX MONTHS ENDED  PERIOD ENDED
                                MARCH 31, 1994    SEPTEMBER 30,                                      MARCH 31, 1994    SEPTEMBER 30,
                                (UNAUDITED)       1993            1992     1991     1990(2)  1989    (UNAUDITED)       1993(1)
- - ------------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>               <C>             <C>      <C>      <C>      <C>     <C>               <C>
PER SHARE OPERATING DATA:
Net asset value, beginning of period      $18.06        $16.92    $16.17   $15.16   $15.27   $14.96    $18.07          $17.33
- - ------------------------------------------------------------------------------------------------------------------------------------
Income (loss) from investment operations:
Net investment income                        .44           .93       .96      .92      .98     1.06       .38             .30
Net realized and unrealized
gain (loss) on investments                 (1.42)         1.35       .73     1.01     (.11)     .31     (1.43)            .74
                                          ------        ------    ------   ------   ------   ------    ------          ------
Total income (loss) from
investment operations                       (.98)         2.28      1.69     1.93      .87     1.37     (1.05)           1.04

- - ------------------------------------------------------------------------------------------------------------------------------------
Dividends and distributions to shareholders:
Dividends from net
investment income                           (.46)         (.96)     (.91)    (.92)    (.98)   (1.06)     (.38)           (.30)
Distributions from net realized
gain on investments                         (.08)         (.18)     (.03)      --       --       --      (.08)             --
                                          ------         ------   ------   ------   ------   ------    ------          ------
Total dividends and distributions
to shareholders                             (.54)        (1.14)     (.94)    (.92)    (.98)   (1.06)     (.46)           (.30)
- - ------------------------------------------------------------------------------------------------------------------------------------
Net asset value, end of period            $16.54        $18.06    $16.92   $16.17   $15.16   $15.27    $16.56          $18.07
                                          ------        ------    ------   ------   ------   ------    ------          ------
                                          ------        ------    ------   ------   ------   ------    ------          ------
- - ------------------------------------------------------------------------------------------------------------------------------------

TOTAL RETURN, AT NET ASSET VALUE(3)        (5.62)%       14.02%    10.74%   13.08%    5.81%    9.37%    (5.94)%          6.04%

- - ------------------------------------------------------------------------------------------------------------------------------------
RATIOS/SUPPLEMENTAL DATA:
Net assets, end of period
(in thousands)                           $66,781       $62,158   $33,751  $23,791  $16,863  $13,105    $9,707          $5,104
- - ------------------------------------------------------------------------------------------------------------------------------------
Average net assets
(in thousands)                           $65,742       $45,949   $27,811  $19,936  $15,145  $11,200    $6,934          $2,298

- - ------------------------------------------------------------------------------------------------------------------------------------
Number of shares outstanding at
end of period (in thousands)               4,036         3,442     1,995    1,471    1,113      858       586             282
- - ------------------------------------------------------------------------------------------------------------------------------------
Ratios to average net assets:
Net investment income                       5.09%(4)      5.40%     5.81%    5.83%    6.43%    6.87%     4.46%(4)        3.99%(4)
Expenses, before voluntary
assumption by the Manager                   1.09%(4)      1.18%     1.35%    1.60%    1.62%    2.04%     1.96%(4)        1.96%(4)
Expenses, net of voluntary
assumption by the Manager                    N/A          1.10%      .95%     .91%     .62%     .42%      N/A             N/A
- - ------------------------------------------------------------------------------------------------------------------------------------
Portfolio turnover rate(5)                    31%            7%       47%      67%      62%     142%       31%              7%

<FN>
1.  For the period from May 3, 1993 (inception of offering) to September 30,
    1993.
2.  On April 7, 1990, Oppenheimer Management Corporation became the investment
    advisor to the Fund.
3.  Assumes a hypothetical initial investment on the business day before the
    first day of the fiscal period, 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.
4.  Annualized.
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 six months ended March 31, 1994 were
    $44,321,778 and $22,691,429, respectively.

</TABLE>

See accompanying Notes to Financial Statements.


12  Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

                         NOTES TO FINANCIAL STATEMENTS  (Unaudited)


- - --------------------------------------------------------------------------------
1. SIGNIFICANT           Oppenheimer Insured Tax-Exempt Bond Fund (the Fund) is
   ACCOUNTING POLICIES   a separate series of Oppenheimer Tax-Exempt Bond Fund,
                         a diversified, open-end management investment Company
                         registered under the Investment Company Act of 1940, as
                         amended. The Fund's investment advisor is Oppenheimer
                         Management Corporation (the Manager). The Fund offers
                         both Class A and Class B shares. Class A shares are
                         sold with a front-end sales charge. Class B shares may
                         be subject to a contingent deferred sales charge. Both
                         classes of shares have identical rights to earnings,
                         assets and voting privileges, except that each class
                         has its own distribution and/or service plan, expenses
                         directly attributable to a particular class and
                         exclusive voting rights with respect to matters
                         affecting a single class. 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.
                         -------------------------------------------------------
                         INVESTMENT VALUATION.  Portfolio securities are valued
                         at 4:00 p.m. (New York time) on each trading day.
                         Long-term debt securities are valued by a portfolio
                         pricing service approved by the Board of Trustees.
                         Long-term debt securities which cannot be valued by the
                         approved portfolio pricing service are valued by
                         averaging the mean between the bid and asked prices
                         obtained from two active market makers in such
                         securities. Short-term 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.
                         Securities for which market quotes are not readily
                         available are valued under procedures established by
                         the Board of Trustees to determine fair value
                         in good faith.
                         -------------------------------------------------------
                         ALLOCATION OF INCOME, EXPENSES AND GAINS AND LOSSES.
                         Income, expenses (other than those attributable to a
                         specific class) and 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 INCOME 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 tax provision is required.
                         -------------------------------------------------------
                         DISTRIBUTIONS TO SHAREHOLDERS. The Fund intends to
                         declare dividends separately for Class A and Class B
                         shares from net investment income each day the New York
                         Stock Exchange is open for business and pay such
                         dividends monthly. Distributions from net realized
                         gains on investments, if any, will be declared
                         at least once each year.
                         -------------------------------------------------------
                         OTHER. Investment transactions are accounted for on the
                         date the investments are purchased or sold (trade
                         date). Original issue discount on securities purchased
                         is amortized over the life of the respective
                         securities, in accordance with federal income tax
                         requirements. 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.



13  Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

                         NOTES TO FINANCIAL STATEMENTS (Unaudited) (Continued)


- - --------------------------------------------------------------------------------
2. SHARES OF             The Fund has authorized an unlimited number of no par
   BENEFICIAL INTEREST   value shares of beneficial interest of each class.
                         Transactions in shares of beneficial interest were as
                         follows:

<TABLE>
<CAPTION>
                                                                  SIX MONTHS ENDED MARCH 31, 1994   YEAR ENDED SEPTEMBER 30, 1993(1)
                                                                  -------------------------------   --------------------------------
                                                                  SHARES             AMOUNT         SHARES                  AMOUNT
                         -----------------------------------------------------------------------------------------------------------
                         <S>                                      <C>               <C>             <C>                 <C>
                         Class A:
                         Sold                                        833,477        $14,776,080      1,716,581          $29,729,902
                         Dividends and distributions reinvested       84,512          1,503,476        122,875            2,119,692
                         Redeemed                                   (323,283)        (5,681,968)      (392,790)          (6,805,683)
                                                                    --------        -----------      ---------          -----------
                         Net increase                                594,706        $10,597,588      1,446,666          $25,043,911
                                                                    --------        -----------      ---------          -----------
                                                                    --------        -----------      ---------          -----------
                         ----------------------------------------------------------------------------------------------------------
                         Class B:
                         Sold                                        323,287        $ 5,722,462        281,944          $ 4,987,254
                         Dividends and distributions reinvested        6,446            113,992          1,056               18,887
                         Redeemed                                    (25,784)          (457,013)          (580)             (10,392)
                                                                    --------        -----------      ---------          -----------
                         Net increase                                303,949        $ 5,379,441        282,420          $ 4,995,749
                                                                    --------        -----------      ---------          -----------
                                                                    --------        -----------      ---------          -----------
<FN>
                         1.   For the year ended September 30, 1993 for Class A
                              shares and for the period from May 3, 1993
                              (inception of offering) to September 30, 1993 for
                              Class B shares.
</TABLE>

- - --------------------------------------------------------------------------------
3. UNREALIZED GAINS AND       At March 31, 1994, net unrealized depreciation of
   LOSSES ON INVESTMENTS      investments of $1,015,023 was composed of gross
                              appreciation  of $1,804,290, and gross
                              depreciation of $2,819,313.

- - -------------------------------------------------------------------------------
4. MANAGEMENT FEES            Management fees paid to the Manager were in
   AND OTHER TRANSACTIONS     accordance with the investment advisory agreement
   WITH AFFILIATES            with the Fund which provides for an annual fee of
                              .45% on the first $100 million of net assets, .40%
                              on the next $150 million, .375% on the next $250
                              million and .35% on net assets in excess of $500
                              million. The Manager has agreed to assume Fund
                              expenses (with specified exceptions) in excess of
                              the most stringent applicable regulatory limit on
                              Fund expenses.
                                             The Manager acts as the accounting
                              agent for the Fund at an annual fee of $12,000,
                              plus out-of-pocket costs and expenses reasonably
                              incurred.
                                             For the six months ended March 31,
                              1994, commissions (sales charges paid by
                              investors) on sales of Class A shares totaled
                              $246,277, of which $58,467 was retained by
                              Oppenheimer Funds Distributor, Inc. (OFDI), a
                              subsidiary of the Manager, as general distributor,
                              and by an affiliated broker/dealer. During the six
                              months ended March 31, 1994, OFDI received
                              contingent deferred sales charges of $6,721 upon
                              redemption of Class B shares, as reimbursement for
                              sales commissions advanced by OFDI at the time
                              of sale of such shares.
                                         Oppenheimer Shareholder Services (OSS),
                              a division of the Manager, is the transfer and
                              shareholder servicing agent for the Fund, and for
                              other registered investment companies. OSS's total
                              costs of providing such services are allocated
                              ratably to these companies.
                                         Under separate approved plans, each
                              class may expend up to .25% of its net  assets
                              annually to reimburse OFDI for costs incurred in
                              connection with the personal service and
                              maintenance of accounts that hold shares of the
                              Fund, including amounts paid to brokers, dealers,
                              banks and other institutions. In addition, Class B
                              shares are subject to an asset-based sales charge
                              of .75% of net assets annually, to reimburse OFDI
                              for sales commissions paid from its own resources
                              at the time of sale and associated financing
                              costs. In the event of termination or
                              discontinuance of the Class B plan, the Board of
                              Trustees may allow the Fund to continue payment of
                              the asset-based sales charge to OFDI for
                              distribution expenses incurred on Class B shares
                              sold prior to termination or discontinuance of the
                              plan. During the six months ended March 31, 1994,
                              OFDI paid $2,902 to an affiliated broker/dealer as
                              reimbursement for Class A personal service and
                              maintenance expenses and retained $36,769 as
                              reimbursement for Class B sales commissions and
                              service fee advances, as well as financing costs.


14 Oppenheimer Insured Tax-Exempt Bond Fund



<PAGE>

                         -------------------------------------------------------
                         OPPENHEIMER INSURED TAX-EXEMPT BOND FUND
                         A Series of Oppenheimer Tax-Exempt Bond Fund


- - --------------------------------------------------------------------------------
OFFICERS AND TRUSTEES      James C. Swain, Chairman and Chief Executive Officer
                           Robert G. Avis, Trustee
                           William A. Baker, Trustee
                           Charles Conrad, Jr., Trustee
                           Jon S. Fossel, Trustee and President
                           Raymond J. Kalinowski, Trustee
                           C. Howard Kast, Trustee
                           Robert M. Kirchner, Trustee
                           Ned M. Steel, Trustee
                           Andrew J. Donohue, Vice President
                           Caryn R. Halbrecht, Vice President
                           Robert E. Patterson, Vice President
                           George C. Bowen, Vice President, Secretary and
                           Treasurer
                           Lynn M. Coluccy, Assistant Treasurer
                           Robert G. Zack, Assistant Secretary

- - --------------------------------------------------------------------------------
INVESTMENT ADVISOR         Oppenheimer Management Corporation

- - --------------------------------------------------------------------------------
DISTRIBUTOR                Oppenheimer Funds Distributor, Inc.

- - --------------------------------------------------------------------------------
TRANSFER AND SHAREHOLDER   Oppenheimer Shareholder Services
SERVICING AGENT

- - --------------------------------------------------------------------------------
CUSTODIAN OF               Citibank, N.A.
PORTFOLIO SECURITIES

- - --------------------------------------------------------------------------------
INDEPENDENT AUDITORS       Deloitte & Touche

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

                           The financial statements included herein have been
                           taken from the records of the Fund without
                           examination by the independent auditors.
                           This is a copy of a report to shareholders of
                           Oppenheimer Insured Tax-Exempt Bond Fund. This report
                           must be preceded or accompanied by a Prospectus of
                           Oppenheimer Insured Tax-Exempt Bond Fund. For
                           material information concerning the Fund, see the
                           Prospectus.


                           15   Oppenheimer Insured Tax-Exempt Bond Fund


<PAGE>


Back Cover A -- Insured Tax-Exempt Bond Fund


- - ------------
``How may I help you?''


- - ------------
``Just as OppenheimerFunds offers over 35 different mutual funds designed to
help meet virtually every investment need, Oppenheimer Shareholder Services
offers a variety of services to satisfy your individual needs. Whenever you
require help, we're only a toll-free phone call away.

     ``For personalized assistance and account information, call our General
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shares, exchange shares, or conduct AccountLink transactions, simply by calling
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     ``And for added convenience, OppenheimerFunds' PhoneLink, an automated
voice response system, is available 24 hours a day, 7 days a week. PhoneLink
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even make purchases, exchanges and redemptions using your touch-tone phone. Of
course, PhoneLink will always give you the option to speak with a Customer
Service Representative during the hours shown to the left.

      ``When you invest in OppenheimerFunds, you know you'll receive a high
level of customer service. The International Customer Service Association knows
it, too, as it awarded Oppenheimer Shareholder Services a 1993 Award of
Excellence for consistently demonstrating superior customer service.

     ``Whatever your needs, we're ready to assist you.''

1993 AWARD OF EXCELLENCE LOGO

[B&W PHOTO]
Barbara Hennigar
Chief Executive Officer
Oppenheimer Shareholder Services



General Information
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Monday through Friday from 8:30 a.m. to 8:00 p.m., and Saturday from 10:00 a.m.
to 2:00 p.m. ET.

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PhoneLink
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Get automated information or make automated transactions. 24 hours a day, 7 days
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finances.
24 hours a day, 7 days a week.

RS865.0594.N


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P.O. Box 5270
Denver, CO 80217-5270

- - ------------
Bulk Rate
U.S. Postage
PAID
Permit No. 469
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- - ------------



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