BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC
N-30D, 1996-02-29
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- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                         ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------
 
                                                                January 31, 1996
 
Dear Shareholder,
 
   Since the inception of The BlackRock California Insured Municipal 2008 Term
Trust Inc. in 1992, the market for investments in fixed income securities has
witnessed an unprecedented amount of interest rate volatility, which has changed
the landscape for fixed income investors. 1995 has been a great year for
investments in the bond market following the disappointments of 1994, as yields
have declined and the value of fixed income securities has increased
dramatically.
 
   Looking forward, we maintain a positive outlook for the market's performance
in 1996. The economy currently appears to be growing at a steady rate and
inflation appears to be under control. Market participants are beginning to
agree that the Federal Reserve has achieved the "soft landing" that they set out
to accomplish through a series of interest rate increases last year, and are
optimistic for a further ease in the Fed's monetary policy should a budget
accord emphasizing fiscal restraint be reached in Washington.
 
   BlackRock Financial Management, Inc. is completing its first year as part of
PNC Bank Corporation, becoming an essential part of PNC's Asset Management Group
by taking a leadership role in their fixed income management operations. We have
witnessed consistent growth of our assets under management, which now stand at
approximately $34 billion, as both retail and institutional fixed income
investors continue to recognize the value of our risk management capabilities
and long term investment philosophy.
 
   We look forward to maintaining your respect and confidence and to serving
your financial needs in the coming year.
 
Sincerely,
 
 
Laurence D. Fink                                Ralph L. Schlosstein
Chairman                                        President
 
                                       1
<PAGE>
                                                                January 31, 1996
 
Dear Shareholder:
 
   We are pleased to present the annual report for The BlackRock California
Insured Municipal 2008 Term Trust Inc. (NYSE symbol: "BFC") for the year ended
December 31, 1995. The past year has been an exciting and challenging time to be
participating in the fixed income markets, and we would like to take this
opportunity to review the Trust's strong performance from both a stock price and
net asset value (NAV) perspective, as well as to discuss the opportunities
available to the Trust in the current lower interest rate environment.
 
   The Trust is a closed-end bond fund whose investment objective is to manage a
portfolio of municipal debt securities that will return $15 per share (an amount
equal to the Trust's initial public offering price) to investors on or about
December 31, 2008, while providing current income exempt from regular federal
and California income tax. The Trust seeks to achieve this objective by
investing in high credit quality ("AAA" or insured to "AAA") California
tax-exempt general obligation and revenue bonds issued by city, county and state
municipalities.
 
   The table below summarizes the performance of the Trust's stock price and net
asset value (the market value of its bonds per share) over the fiscal year:
 
<TABLE>
<CAPTION>
                                     12/31/95    12/31/94    CHANGE      HIGH       LOW
<S>                                  <C>         <C>         <C>        <C>       <C>
STOCK PRICE                          $13.625     $12.000     +13.54%    $14.75    $12.000
NET ASSET VALUE (NAV)                $ 15.92     $ 13.66     +16.54%    $15.99    $ 13.66
PREMIUM/(DISCOUNT) TO NAV            (14.42% )   (12.15% )    (2.27%)   (3.01%)   (14.42%)
</TABLE>
 
THE FIXED INCOME MARKETS
 
   The dramatic rally in the fixed income markets, which caused interest rates
to fall and prices of fixed income securities to rise since late 1994 has
changed the market landscape for fixed income investors. The Treasury market
rallied throughout the year, sparked by a deceleration in economic growth from
the torrid pace of 1994 as well as continued signs of subdued inflation. Over
the past twelve months, interest rates have declined substantially across the
Treasury and municipal yield curves. At the end of December, the yield of the
Treasury 30-year bond fell below 6.00% for the first time since October 1993,
closing the year at 5.95%. This represents a fall of 193 basis points (1.93%)
from year-end 1994.
 
   While the overall performance of the municipal debt market somewhat lagged
the rally in the Treasury market, municipal securities posted strong performance
in 1995. Yields on municipal securities have declined dramatically from their
fourth quarter 1994 levels, led by a 123 basis point drop (1.23%) in the yield
on AAA 30-year General Obligation securities from 6.51% on December 31, 1994 to
5.28% on December 31, 1995. Although seasonal demand from coupon payments and
redemptions did not fully match expectations at times during the year, a
relatively light amount of new issuance improved technical conditions in the
municipal market and encouraged the rise in price for these securities.
 
   Market participants have been attuned to the continuing debate in Washington
on tax reform. Most notably, several Congressional leaders and Presidential
hopefuls have proposed a variety of tax simplification plans of which the most
extreme proposal would be a flat tax that would remove the tax-free advantage of
municipal income by exempting all investment income from taxation. On January
17, 1996, The Commission on Economic Growth and Tax Reform, headed by former
congressman Jack Kemp, released its much anticipated report. Their
recommendations emphasized a need for tax simplification towards a "single tax
bracket" without definitively recommending a particular rate of taxation, thus
setting the stage for increased discussion on this issue in the election year.
 
   The California state economy has improved over the past year. Strength in
several sectors, including entertainment, exports and an improving job market
suggest that the state is poised for further expansion. However, military base
closings and corporate downsizing have led many analysts to believe that the
growth may be moderate. The market for
 
                                       2
<PAGE>

California's municipal debt has performed well over the Trust's fiscal year due
to positive expectations for the economy and a light new issuance calendar. We
are optimistic for continued strong performance of the California municipal
market versus the national market in 1996.
 
   Due to investor concerns over the potential threat of tax reform, it is
likely that the municipal market may continue to experience price volatility in
1996. While the municipal market rallied and yields declined over 1995,
municipal securities were trading at cheap levels relative to comparable
Treasuries at year-end. BlackRock believes that municipal securities have the
potential to be the best performing sector of the fixed income markets in 1996
should the tax reform proposals currently negatively affecting municipal bond
performance be eliminated.
 
THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY
 
   The Trust's portfolio is invested in high credit-quality municipal issues
with ratings of "AAA" by Standard & Poor's Corporation (or of equivalent quality
determined by other major rating agencies). In addition, the majority of the
individual securities within the portfolio are insured as to timely payment of
interest and principal by municipal bond insurance companies whose long-term
obligations are rated "AAA." As such, Standard & Poor's has given a AAAf rating
to the portfolio.
 
   BlackRock Financial Management actively manages the Trust's portfolio to
diversify exposure to various sectors, issuers, revenue sources and security
types. BlackRock's investment strategy emphasizes a relative value approach,
rotating sectors to benefit from changing market conditions. As the municipal
bond market rallied throughout 1995, prices of most securities in the portfolio
increased above their purchase price. By selling one of these bonds, the Trust
would recognize a gain and be forced to make a taxable distribution to
shareholders. As one of the Trust's primary objectives is to provide tax-free
income, the portfolio curbed its trading activity to minimize any taxable
distributions.
 
   The Trust employs leverage at about 35% of total assets to enhance its income
by borrowing at short term municipal rates and investing the proceeds in longer
maturity issues which have higher yields. The degree to which the Trust can
benefit from its use of leverage affects the ability of the Trust to pay high
monthly income. The two reductions made to the Fed funds target rate in December
and January lowered the overnight bank lending rate by 0.50% and is expected to
result in lower short term municipal rates. This could provide the Trust an
opportunity to earn more excess income in the coming year through its use of
leverage.
 
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
 
<TABLE>
<CAPTION>
  SECTOR                        DECEMBER 31, 1995    DECEMBER 31, 1994
<S>                             <C>                  <C>
  Water & Sewer                         20%                  22%
  Lease Revenue                         19%                  14%
  Transportation                        14%                  12%
  Certificates of
    Participation                       10%                  13%
  County, City & State                  10%                  11%
  Utility                                9%                   8%
  Tax Revenue                            8%                  11%
  Hospital                               5%                   4%
  Special District                       3%                   3%
  Education                              1%                   1%
  Other                                  1%                   1%
</TABLE>
 
                                       3
<PAGE>
   We look forward to managing the Trust in the coming year to benefit from the
opportunities available to investors in the municipal market. We thank you for
your investment and continued interest in The BlackRock California Insured
Municipal 2008 Term Trust Inc. Please feel free to call our marketing center at
(800) 227-7BFM (7236) if you have any specific questions which were not
addressed in this report.
 
Sincerely yours,

/s/ Robert S. Kapito                      /s/ Kevin Klingert

Robert S. Kapito                          Kevin Klingert
Vice Chairman and Portfolio Manager       Managing Director and Municipal
BlackRock Financial Management, Inc.        Portfolio Manager
                                          BlackRock Financial Management, Inc.
 
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.

Symbol on New York Stock Exchange:                                    BFC
Initial Offering Date:                                        September 18, 1992
Closing Stock Price as of 12/31/95:                                 $13.625
Net Asset Value as of 12/31/95:                                     $15.92
Yield on Closing Stock Price as of 12/31/95 ($13.625)1:               5.67%
Current Monthly Distribution per Common Share2:                    $0.064375
Current Annualized Distribution per Common Share2:                  $0.7725
 
- --------------
 
1 Yield on Closing Stock Price is calculated by dividing the current annualized
distribution per share by the closing stock price per share.
 
2 Distribution is not constant and is subject to change. New distribution rate
effective with the January 1996 payment.
 
                                       4
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
PORTFOLIO OF INVESTMENTS
DECEMBER 31, 1995
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                            OPTION
                 PRINCIPAL                                                                   CALL
  RATING*         AMOUNT                                                                 PROVISIONS+++          VALUE
(UNAUDITED)        (000)                            DESCRIPTION                           (UNAUDITED)          (NOTE 1)
<S>            <C>             <C>                                                      <C>               <C>
- ----------------------------------------------------------------------------------------------------------------------------
                               LONG-TERM INVESTMENTS--145.1%
 AAA           $       6,850   California Hlth. Facs. Fin. Auth. Rev., Marin Gen.                         $        7,111,944
                                Hosp., Ser. A, 5.75%, 8/01/09, FSA...................   08/03 at 102
                               California St. Pub. Wks. Brd.:
 AAA                   2,100    Energy Efficiency, Ser. A, 5.625%, 10/01/08, AMBAC...   10/05 at 102               2,199,372
 AAA                  10,255    Lease Rev., 6.40%, 9/01/08, MBIA.....................   09/01 at 102              11,112,215
 AAA                   9,165   California St. Wide Cmnty. Dev. Auth., Lease Rev.,                                  9,715,358
                                6.00%, 10/01/10, AMBAC...............................   10/02 at 102
                               California St., G.O., MBIA:
 AAA                   3,000    5.50%, 4/01/09.......................................   No Opt. Call               3,119,310
 AAA                  15,000    6.30%, 9/01/08.......................................   No Opt. Call              16,837,800
 AAA                   2,600   Castaic Lake Wtr. Agcy. C.O.P., Wtr. Sys. Impvt.                                    3,160,534
                                Proj., Ser. A, 7.25%, 8/01/10, MBIA..................   No Opt. Call
 AAA                   5,515   Central Coast Wtr. Auth. Rev., St. Wtr. Proj. Reg.                                  6,050,562
                                Facs., 6.40%, 10/01/08, AMBAC........................   10/02 at 102
 AAA                  13,740   East Bay Mun. Utils. Dist., Wtr. Sys. Rev., 6.00%,                                 14,588,033
                               6/01/09, AMBAC........................................   06/02 at 102
 AAA                   4,025   Elsinore Valley Mun. Wtr. Dist., C.O.P., Ser. A,                                    4,361,973
                               6.00%, 7/01/09, FGIC..................................   No Opt. Call
 AAA                   3,475   Los Angeles Arpt. Dept. Rev., Ser. A, 5.50%, 5/15/08,                               3,568,026
                               FGIC..................................................   05/05 at 101
                               Los Angeles Cnty. Asset Leasing Corp. Rev., AMBAC:
 AAA                   2,910    3.80%++, 12/01/07....................................   No Opt. Call               3,100,169
 AAA                   8,090    3.85%++, 12/01/08....................................   No Opt. Call               8,641,981
 AAA                   8,600    4.05%++, 12/01/09....................................   No Opt. Call               9,234,680
 AAA                   1,760   Los Angeles Cnty. Pension Oblig. Cert., Ser. A,                                     1,815,968
                               6.875%, 6/30/07, MBIA.................................   06/96 at 102
 AAA                   1,000   Los Angeles Elec. Rev., 5.75%, 9/01/12, FGIC..........   09/03 at 102               1,030,810
 AAA                   5,765   Los Angeles Wastewtr. Sys. Rev., Ser. B, 6.25%,                                     6,209,366
                               6/01/08, AMBAC........................................   06/02 at 102
 AAA                   3,075   Marysville Hosp. Rev., Fremont-Rideout Hlth. Group,                                 3,307,439
                                Ser. A, 6.20%, 1/01/09, AMBAC........................   01/03 at 102
 AAA                   8,000   Modesto Irrig. Dist. Fin. Rev., Dom. Wtr. Proj., Ser.                               8,505,520
                                A, 6.00%, 9/01/09, AMBAC.............................   09/02 at 102
                               Northern California Pwr. Agcy., Multiple Cap. Facs.
                                Rev., Ser. A, MBIA:
 AAA                   1,000    6.40%, 8/01/07.......................................   08/02 at 102               1,101,450
 AAA                   3,045    6.50%, 8/01/08.......................................   08/02 at 102               3,352,758
 AAA                   1,500   Northern California Transm. Rev., California-Oregon                                 1,522,530
                                Proj., Ser. A, 5.25%, 5/01/08, MBIA..................   No Opt. Call
 AAA                   5,600   Pittsburg Redev. Agcy. Tax Alloc. Rev., Los Medanos                                 5,797,904
                                Cmnty. Dev. Proj., 5.50%, 8/01/07, FGIC..............   08/02 at 102
 AAA                   3,075   Riverside Cnty., Trans. Comm. Sales Tax Rev., Ser. A,                               3,331,209
                                6.50%, 6/01/09, MBIA.................................   06/01 at 102
                               Sacramento Mun. Utils. Dist., Elec. Rev., Ser. C:
 AAA                   2,500    5.75%, 11/15/07, MBIA................................   11/02 at 102               2,635,125
 AAA                   6,250    5.75%, 11/15/08, FGIC................................   11/02 at 102               6,542,125
 AAA                   4,700    5.75%, 11/15/09, MBIA................................   11/02 at 102               4,902,617
 AAA                   5,700   San Bernardino Cnty. C.O.P., Arpt. Impvt., 6.00%,                                   6,114,561
                               7/01/07, MBIA.........................................   07/02 at 102
 AAA                   5,000   San Bernardino Cnty. Trans. Auth., Sales Tax Rev.,                                  5,318,050
                                6.00%, 3/01/10, FGIC.................................   03/02 at 102
</TABLE>
 
                       See Notes to Financial Statements
 
                                       5
<PAGE>
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                            OPTION
                 PRINCIPAL                                                                   CALL
  RATING*         AMOUNT                                                                 PROVISIONS+++          VALUE
(UNAUDITED)        (000)                            DESCRIPTION                           (UNAUDITED)          (NOTE 1)
- ----------------------------------------------------------------------------------------------------------------------------
<S>            <C>             <C>                                                      <C>               <C>
                               San Diego Cnty. Regl. Trans. Cmnty. Sales Tax Rev.,
                                Ser. A:
 AAA           $       7,830    6.00%, 4/01/08, MBIA.................................   04/01 at 102      $        8,590,215
 AAA                   2,500    6.00%, 4/01/08, FGIC.................................   04/01 at 102               2,636,100
 AAA                   7,650   San Diego Redev. Agcy. Rev., Tax Alloc.-Centre City                                 8,161,020
                                Proj., 6.00%, 9/01/08, AMBAC.........................   09/02 at 102
                               San Jose Arpt. Rev., MBIA:
 AAA                   8,010    6.00%, 3/01/09.......................................   03/03 at 102               8,539,701
 AAA                   3,000    6.00%, 3/01/10.......................................   03/03 at 102               3,187,080
 AAA                   3,755    6.10%, 3/01/07.......................................   03/03 at 102               4,067,641
 AAA                   2,865   Santa Clara Cnty. Fin. Auth., Fac. Replacement, Proj.                               3,253,809
                                A, 6.50%, 11/15/07, AMBAC............................   11/04 at 102
 AAA                   2,820   Santa Rosa Wtr. Rev., Ser. B, 6.20%, 9/01/09, FGIC....   09/02 at 101.5             3,024,704
 AAA                   5,000   So. California Rapid Trans. Dist. C.O.P., Workers                                   5,271,100
                                Comp. Fund, 6.00%, 7/01/10, MBIA.....................   01/01 at 102.5
                               So. California Rapid Trans. Dist. Rev., Spec. Benefit
                                Assmt. Dist. A1, AMBAC:
 AAA                   5,750    5.50%, 9/01/09.......................................   09/02 at 100               5,831,937
 AAA                   5,500    6.00%, 9/01/08.......................................   09/02 at 102               5,867,400
 AAA                   8,500   Sonoma Cnty. C.O.P., Capital Rites-Detention Fac.,                                  8,487,165
                                3.45%++, 11/15/10, AMBAC.............................   No Opt. Call
 AAA                   2,000   Univ. of California Rev., Multi-Purpose Projs., Ser.                                2,212,440
                                B-1989, 6.80%, 9/01/99+, AMBAC.......................   No Opt. Call
                               West & Central Basin Fin. Auth. Rev., AMBAC:
 AAA                   1,680    6.125%, 8/01/08......................................   08/02 at 102               1,804,942
 AAA                   1,780    6.125%, 8/01/09......................................   08/02 at 102               1,906,967
 AAA                   2,160   West Sacramento Fin. Auth. Rev., Wtr. Sys. Impvt.,                                  2,183,976
                                5.25%, 8/01/08, FGIC.................................   08/02 at 102
 AAA                   1,000   Whittier California Hlth. Fac. Rev., Presb. Interm.                                 1,101,530
                                Cmnty., 6.25%, 6/01/08, MBIA.........................   No Opt. Call
                                                                                                          ------------------
                               TOTAL INVESTMENTS (cost $221,597,709).................                            240,417,116
                               Other assets in excess of liabilities--2.0%...........                              3,301,428
                               Liquidation value of preferred stock--(47.1)%.........                            (78,000,000)
                                                                                                          ------------------
                               NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100%....                     $      165,718,544
                                                                                                          ------------------
                                                                                                          ------------------
<FN>
- ------------
   *  Rating using the higher of Standard & Poor's, Moody's or Fitch's.
   +  This bond is prerefunded. See glossary for definition.
  ++  This bond contains embedded caps. See glossary for definition.
 +++  Option call provisions: date (month/year) and prices of the earliest optional call or
      redemption. There may be other call provisions at varying prices at later dates.
</TABLE>
 
                                      KEY TO ABBREVIATIONS
 
                         AMBAC--American Municipal Bond Assurance Corporation
                         C.O.P.--Certificate of Participation
                         FGIC--Financial Guaranty Insurance Company
                         FSA--Financial Security Assurance
                         G.O.--General Obligation Bond
                         MBIA--Municipal Bond Insurance Association
 
                       See Notes to Financial Statements
 
                                       6
<PAGE>
- ----------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
DECEMBER 31, 1995
- ----------------------------------------------
<TABLE>
<S>                                  <C>
ASSETS
Investments, at value (cost
 $221,597,709) (Note 1)...........   $240,417,116
Cash..............................         16,942
Interest receivable...............      3,634,183
Deferred organization expenses and
 other assets.....................         41,427
                                     ------------
                                      244,109,668
                                     ------------
LIABILITIES
Dividends payable--common stock...         86,799
Advisory fee payable (Note 2).....         72,390
Dividends payable--preferred
stock.............................         57,591
Administration fee payable (Note
2)................................         20,683
Other accrued expenses............        153,661
                                     ------------
                                          391,124
                                     ------------
NET INVESTMENT ASSETS.............   $243,718,544
                                     ------------
                                     ------------
Net investment assets were
 comprised of:
 Common Stock:
   Par value (Note 4).............   $    104,071
   Paid-in capital in excess of
   par............................    144,619,829
 Preferred Stock (Note 4).........     78,000,000
                                     ------------
                                      222,723,900
Undistributed net investment
income............................      2,244,849
Accumulated net realized loss.....        (69,612)
Net unrealized appreciation.......     18,819,407
                                     ------------
Net investment assets, December
31, 1995.........................]   $243,718,544
                                     ------------
                                     ------------
Net assets applicable to common
shareholders......................   $165,718,544
                                     ------------
                                     ------------
Net asset value per common share:
 ($165,718,544 / 10,407,093 shares
 of common stock issued and
 outstanding).....................         $15.92
                                     ------------
                                     ------------
</TABLE>

- ----------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENT OF OPERATIONS
YEAR ENDED DECEMBER 31, 1995
- ----------------------------------------------
<TABLE>
<S>                                  <C>
NET INVESTMENT INCOME
 
Income
 
 Interest and discount earned.....   $ 13,288,711
                                     ------------
 
Expenses
 
 Investment advisory..............        823,656
 
 Administration...................        235,330
 
 Auction agent....................        227,000
 
 Custodian........................         52,000
 
 Directors........................         35,000
 
 Reports to shareholders..........         34,000
 
 Legal............................         24,000
 
 Transfer agent...................         19,000
 
 Audit............................         18,000
 
 Miscellaneous....................        127,541
                                     ------------
 
 Total expenses...................      1,595,527
                                     ------------
 
Net investment income.............     11,693,184
                                     ------------
 
REALIZED AND UNREALIZED GAIN ON
INVESTMENTS (NOTE 3)
 
Net realized gain on
investments.......................        602,078
 
Net change in unrealized
 appreciation on investments......     23,061,156
                                     ------------
 
Net gain on investments...........     23,663,234
                                     ------------
 
NET INCREASE IN NET INVESTMENT
ASSETS RESULTING FROM
OPERATIONS........................   $ 35,356,418
                                     ------------
                                     ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       7
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
STATEMENTS OF CHANGES IN NET INVESTMENT ASSETS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                            YEAR ENDED      YEAR ENDED
                                                                           DECEMBER 31,    DECEMBER 31,
                                                                               1995            1994
                                                                           ------------    ------------
<S>                                                                        <C>             <C>
INCREASE (DECREASE) IN NET INVESTMENT ASSETS
 
Operations:
 Net investment income..................................................   $ 11,693,184    $ 11,670,917
 Net realized gain (loss) on investments................................        602,078        (637,399)
 Net change in unrealized appreciation (depreciation) on investments....     23,061,156     (25,201,049)
                                                                           ------------    ------------
 Net increase (decrease) in net investment assets resulting from
 operations.............................................................     35,356,418     (14,167,531)
                                                                           ------------    ------------
 
Dividends and distributions:
 To common shareholders from net investment income......................     (8,875,142)     (8,898,065)
 To preferred shareholders from net investment income...................     (2,896,935)     (2,209,788)
 To common shareholders in excess of net realized gain on investments...        (22,795)        -
 To preferred shareholders in excess of net realized gain on
 investments............................................................         (7,513)]       -
                                                                           ------------    ------------
                                                                            (11,802,385)     11,107,853
                                                                           ------------    ------------
Capital stock transactions:
 Additional capital charge with respect to initial public offering of
 shares.................................................................        -                   613
                                                                           ------------    ------------
      Total increase (decrease).........................................     23,554,033     (25,274,771)
 
NET INVESTMENT ASSETS
Beginning of year.......................................................    220,164,511     245,439,282
                                                                           ------------    ------------
End of year.............................................................   $243,718,544    $220,164,511
                                                                           ------------    ------------
                                                                           ------------    ------------
</TABLE>
 
                       See Notes to Financial Statements.
 
                                       8
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                      SEPTEMBER 28,
                                                                                                          1992*
                                                                 YEAR ENDED DECEMBER 31,                 THROUGH
                                                           ------------------------------------       DECEMBER 31,
                                                             1995         1994           1993             1992
                                                           --------     --------       --------       -------------
<S>                                                        <C>          <C>            <C>            <C>
PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of the period...............    $  13.66     $  16.09       $  14.18         $   14.10
                                                           --------     --------       --------       -------------
 Net investment income.................................        1.12         1.12           1.14              0.16
 Net realized and unrealized gain (loss) on
 investments...........................................        2.27        (2.48)          1.81              0.20
                                                           --------     --------       --------       -------------
Net increase (decrease) from investment operations.....        3.39        (1.36)          2.95              0.36
                                                           --------     --------       --------       -------------
Dividends from net investment income to:
 Preferred shareholders................................       (0.28)       (0.21)         (0.18)            (0.02)
 Common shareholders...................................       (0.85)       (0.86)         (0.85)            (0.07)
Distributions from net realized gain on investments to:
 Preferred shareholders................................       --           --             --   **         --
 Common shareholders...................................       --           --             (0.01)          --
Distributions in excess of net realized gain on
 investments to:
 Preferred shareholders................................       --   **      --             --              --
 Common shareholders...................................       --   **      --             --              --
                                                           --------     --------       --------       -------------
Total dividends and distributions......................       (1.13)       (1.07)         (1.04)            (0.09)
                                                           --------     --------       --------       -------------
Capital charge with respect to issuance of shares......       --           --   ****      --                (0.19)
                                                           --------     --------       --------       -------------
Net asset value, end of period***......................    $  15.92     $  13.66       $  16.09         $   14.18#
                                                           --------     --------       --------       -------------
                                                           --------     --------       --------       -------------
Market value, end of period***.........................    $ 13.625     $  12.00       $ 15.125         $  13.875
                                                           --------     --------       --------       -------------
                                                           --------     --------       --------       -------------
TOTAL INVESTMENT RETURN+...............................       20.57%      (15.59)%        14.79%            (1.11)%
                                                           --------     --------       --------       -------------
                                                           --------     --------       --------       -------------
 
RATIOS TO AVERAGE NET ASSETS OF COMMON SHAREHOLDERS:+++
Expenses...............................................        1.02%        1.08%           .96%             0.86%++
Net investment income..................................        7.46%        7.70%          7.33%             4.65%++
 
SUPPLEMENTAL DATA:
Average net assets of common shareholders (in
thousands).............................................    $156,774     $151,669       $160,350         $ 141,249
Portfolio turnover.....................................          13%          17%             8%                0%
Net assets of common shareholders, end of period (in
thousands).............................................    $165,719     $142,165       $167,439         $ 147,610
Preferred stock outstanding (in thousands).............    $ 78,000     $ 78,000       $ 78,000         $  78,000
Asset coverage per share of preferred stock, end of
period.................................................    $ 78,115##   $141,131       $157,333         $ 144,500

<FN>
- ------------
  * Commencement of investment operations.
 ** Actual amount paid to preferred shareholders was $0.0007 and $0.00344 per
    common share for the fiscal years ended December 31, 1995 and 1993
    respectively. The actual amount paid to common shareholders was $0.0021.
 *** Net asset value and market value are published in The Wall Street Journal
     each Monday.
**** Actual amount was $0.00006 per common share.
  # Net asset value immediately after the closing of the first public offering
    was $14.06.
 ## A stock split occured on July 24, 1995 (Note 4).
  + Total investment return is calculated assuming a purchase of common stock at
    the current market price on the first day and a sale at the current market
    value on the last day of the period. Dividends and distributions, if any,
    are assumed for purposes of this calculation to be reinvested at prices
    obtained under the Trust's dividend reinvestment plan. Total investment
    return does not reflect brokerage commissions. Total investment return for
    periods of less than a full year are not annualized.
 ++ Annualized.
 +++ Ratios calculated on the basis of income and expenses applicable to both
     the common and preferred shares relative to the average net assets of
     common shareholders. Ratios do not reflect the effect of dividend payments
     to preferred shareholders.
</TABLE>
 
The information above represents the audited operating performance data for a
share of common stock outstanding, total investment return, ratios to average
net assets and other supplemental data for the period indicated. This
information has been determined based upon financial information provided in the
financial statements and market value data for Trust's shares.
 
                       See Notes to Financial Statements.
 
                                       9
<PAGE>
- ----------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERM TRUST INC.
NOTES TO FINANCIAL STATEMENTS
- ----------------------------------------------
 
Note 1. Accounting

Policies The BlackRock California Insured Municipal 2008 Term Trust Inc. (the
"Trust") was organized in Maryland on August 7, 1992 as a non-diversified
closed-end management investment company. The Trust's investment objective is to
manage a non-diversified portfolio of high quality securities that will return
$15 per share to investors on or about December 31, 2008 while providing current
income exempt from regular Federal and California State income taxes. The
ability of issuers of debt securities held by the Trust to meet their
obligations may be affected by economic developments in the state, a specific
industry or region. No assurance can be given that the Trust's investment
objective will be achieved.
 
   The following is a summary of significant accounting policies followed by the
Trust.
 
SECURITIES VALUATION: Municipal securities (including commitments to purchase
such securities on a "when-issued" basis) are valued on the basis of prices
provided by a pricing service which uses information with respect to
transactions in bonds, quotations from bond dealers, market transactions in
comparable securities and various relationships between securities in
determining values. Any securities or other assets for which such current market
quotations are not readily available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.
 
   Short-term securities which mature in more than 60 days are valued at current
market quotations. Short-term securities which mature in 60 days or less are
valued at amortized cost, if their term to maturity from date of purchase is 60
days or less, or by amortizing their value on the 61st day prior to maturity, if
their original term to maturity from date of purchase exceeded 60 days.
 
OPTION SELLING/PURCHASING: When the Trust sells or purchases an option, an
amount equal to the premium received or paid by the Trust is recorded as a
liability or an asset and is subsequently adjusted to the current market value
of the option written or purchased. Premiums received or paid from writing or
purchasing options which expire unexercised are treated by the Trust on the
expiration date as realized gains or losses. The difference between the premium
and the amount paid or received on effecting a closing purchase or sale
transaction, including brokerage commissions, is also treated as a realized gain
or loss. If an option is exercised, the premium paid or received is added to the
proceeds from the sale or cost of the purchase in determining whether the Trust
has realized a gain or a loss on investment transactions. The Trust, as writer
of an option, may have no control over whether the underlying securities may be
sold (call) or purchased (put) and as a result bears the market risk of an
unfavorable change in the price of the security underlying the written option.
 
FINANCIAL FUTURES CONTRACTS: A futures contract is an agreement between two
parties to buy and sell a financial instrument for a set price on a future date.
Initial margin deposits are made upon entering into futures contracts and can be
either cash or securities. During the period the futures contract is open,
changes in the value of the contract are recognized as unrealized gains or
losses by "marking-to-market" on a daily basis to reflect the market value of
the contract at the end of each day's trading. Variation margin payments are
made or received, depending upon whether unrealized gains or losses are
incurred. When the contract is closed, the Trust records a realized gain or loss
equal to the difference between proceeds from (or cost of) the closing
transaction and the Trust's basis in the contract.
 
   The Trust may invest in financial futures contracts primarily for the purpose
of hedging its existing portfolio securities or securities the Trust intends to
purchase against fluctuations in value caused by changes in prevailing market
interest rates. Should interest rates move unexpectedly, the Trust may not
achieve the anticipated benefits of the financial futures contracts and may
realize a loss. The use of futures transactions involves the risk of imperfect
correlation in movements in the price of futures contracts, interest rates and
the underlying hedged assets.
 
SHORT SALES: The Trust may make short sales of securities as a method of hedging
potential price declines in similar securities owned. When the Trust makes a
short sale, it may borrow the security sold short and deliver it to the
broker-dealer through which it made the short sale as collateral for its
obligation to deliver the security upon conclusion of the sale. The Trust may
have to pay a fee to borrow the particular securities and may be obligated to
pay over any payments received on such borrowed securities. A gain, limited to
the price at which the Trust sold the security short, or a loss, unlimited as to
dollar amount, will be recognized upon the termination of a short sale if the
market price is greater or less than the proceeds originally received.
 
SECURITIES TRANSACTIONS AND INVESTMENT INCOME: Securities transactions are
recorded on the trade date. Realized gains and losses are calculated on the
identified cost basis. Interest income is recorded on the accrual basis and the
Trust amortizes premium and accretes original issue discount on securities
purchased using the interest method.
 
FEDERAL INCOME TAXES: It is the Trust's intention to continue to meet the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute sufficient net income to shareholders. For this
reason and because substan-
tially all of the Trust's gross income consists of tax-exempt interest, no
Federal income tax provision is required.
 
DIVIDENDS AND DISTRIBUTIONS: The Trust declares and pays dividends and
distributions to common shareholders monthly from net investment income. Net
capital gains, if any, in excess of loss carryforwards may be distributed
annually. Dividends and distributions are recorded on the ex-dividend date.
Dividends and distributions to preferred shareholders are accrued and determined
as described in Note 4.
 
DEFERRED ORGANIZATION EXPENSES: A total of $45,000 was incurred in connection
with the organization of the Trust. These
 
                                       10
<PAGE>
costs have been deferred and are being amortized ratably over a period of sixty
months from the date the Trust commenced investment operations.
 
RECLASSIFICATION OF CAPITAL ACCOUNTS: Effective Jan-uary 1, 1994, the Trust
began accounting and reporting for perma-nent differences between financial and
tax reporting in accor-dance with the American Institute of Certified Public
Accountants' Statement of Position 93-2: Determination, Disclosure and Finan-
cial Statement Presentation of Income, Capital Gain and Return of Capital
Distributions by Investment Companies. The cumulative effect of adopting the
statement for the year ended December 31, 1995 was to decrease accumulated net
realized loss and increase undistributed net investment income by $3,983. Net
investment income, net realized gains and net assets were not affected by this
change.
 
Note 2. Agreements

The Trust has an Investment Advisory Agreement with BlackRock Financial
Management, Inc. (the "Adviser") and an Administration Agreement with Princeton
Administrators L.P. (the "Administrator"), an indirect wholly owned subsidiary
of Merrill Lynch & Co., Inc.
 
   The investment advisory fee paid to the Adviser is computed weekly and
payable monthly at an annual rate of 0.35% of the Trust's average weekly net
investment assets. The administration fee paid to the Administrator is also
computed weekly and payable monthly at an annual rate of 0.10% of the Trust's
average weekly net investment assets.
 
   Pursuant to the agreements, the Adviser provides continuous supervision of
the investment portfolio and pays the compensation of officers of the Trust who
are affiliated persons of the Adviser. The Administrator pays occupancy and
certain clerical and accounting costs of the Trust. The Trust bears all other
costs and expenses.
 
   On February 28, 1995, the Adviser was acquired by PNC Bank, N.A. Following
acquisition, the Adviser has become a wholly-owned corporate subsidiary of PNC
Asset Management Group, Inc., the holding company for PNC's Asset Management
businesses.
 
Note 3. Portfolio Securities

Purchases and sales of investment securities, other than short-term investments,
for the year ended December 31, 1995 aggregated $31,813,115 and $29,640,827,
respectively.
 
   The Federal income tax basis of the Trust's investments at December 31, 1995
was substantially the same as the basis for financial reporting, and
accordingly, unrealized appreciation was $18,819,407 (on both a gross and net
basis).
 
   For Federal income tax purposes, the Trust had a capital loss carryforward at
December 31, 1995 of approximately $70,000] which will expire in 2002.
Accordingly, no capital gain distribution is expected to be paid to shareholders
until net gains have been realized in excess of such amounts.
 
Note 4. Capital

There are 200 million shares of $.01 par value common stock authorized. Of the
10,407,093 common shares outstanding at December 31, 1995, the Adviser owned
7,093 shares. As of December 31, 1995, there were $3,120 preferred shares
outstanding as follows: Series W28-1,560 and Series W7-1,560.
 
   Offering costs ($377,236) incurred in connection with the Trust's
underwriting of the Trust's common stock have been charged to paid-in capital in
excess of par of the common stock.
 
   The Trust may classify or reclassify any unissued shares of common stock into
one or more series of preferred stock. On November 23, 1992, the Trust
reclassified 1,560 shares of common stock and issued 2 series of Auction Market
Preferred Stock ("Preferred Stock") as follows: Series W28--780 shares, Series
W7--780 shares. The Preferred Stock has a liquidation value of $25,000 per share
plus any accumulated but unpaid dividends.
 
   The underwriting discount ($1,365,000) and offering costs ($273,875) incurred
in connection with the Preferred Stock offering have been charged to paid-in
capital in excess of par of the common stock.
 
   Dividends on Series W7 are cumulative at a rate which is reset every 7 days
based on the results of an auction. Dividends on Series W28 are also cumulative
at a rate which is reset every 28 days based on the results of an auction.
Dividend rates ranged from 2.87% to 6.25% during the year ended December 31,
1995.
 
   The Trust may not declare dividends or make other distributions on shares of
common stock or purchase any such shares if, at the time of the declaration,
distribution or purchase, asset coverage with respect to the outstanding
Preferred Stock would be less than 200%.
 
   The Preferred Stock is redeemable at the option of the Trust, in whole or in
part, on any dividend payment date at $25,000 per share plus any accumulated or
unpaid dividends whether or not declared. The Preferred Stock is also subject to
mandatory redemption at $25,000 per share plus any accumulated or unpaid
dividends, whether or not declared if certain requirements relating to the
composition of the assets and liabilities of the Trust as set forth in the
Articles of Incorporation are not satisfied.
 
   The holders of Preferred Stock have voting rights equal to the holders of
common stock (one vote per share) and will vote together with holders of shares
of common stock as a single class. However, holders of Preferred Stock are also
entitled to elect two of the Trust's directors. In addition, the Investment
Company Act of 1940 requires that along with approval by stockholders that might
otherwise be required, the approval of the holders of a majority of any
outstanding preferred shares, voting separately as a class would be required to
(a) adopt any plan of reorganization that would adversely affect the Preferred
Stock, and (b) take any action requiring a vote of security holders, including,
among other things, changes in the Trust's subclassification as a closed-end
investment company or changes in its fundamental investment restrictions.
 
   On May 16, 1995 shareholders approved a proposal to split each share of the
Trust's Auction Rate Municipal Preferred Stock into two shares and
simultaneously reduce each share's liquida-tion preference from $50,000 to
$25,000 plus any accumulated but unpaid dividends. The stock split occurred on
July 24, 1995.
 
                                       11
<PAGE>
 
Note 5. Dividends

Subsequent to December 31, 1995 the Board of Directors of the Trust declared a
dividend from undistributed earnings of $0.064375 per common share payable
January 31, 1996 to shareholders of record on January 16, 1996.
 
   For the period January 1, 1996 to January 31, 1996, dividends declared on
Preferred Stock totalled $222,133 in aggregate for the two outstanding Preferred
Stock series.
 
Note 6. Quarterly Data
(Unaudited)

<TABLE>
<CAPTION>
                                                                                                             NET INCREASE
                                                                              NET REALIZED AND              (DECREASE) IN
                                                                                 UNREALIZED                 NET INVESTMENT
                                         NET INVESTMENT INCOME                GAINS (LOSSES) ON            ASSETS RESULTING
                                                                                 INVESTMENTS               FROM OPERATIONS
                                                            PER                                PER
  QUARTERLY            TOTAL                              COMMON                              COMMON
  PERIOD               INCOME             AMOUNT           SHARE            AMOUNT            SHARE             AMOUNT
<S>               <C>                <C>                <C>           <C>                  <C>            <C>
January 1, 1994
 to March 31,
 1994...........  $      3,341,431   $      2,913,946   $     0.28    $      (17,764,132)  $     (1.71 )  $      (14,850,185)
April 1, 1994 to
June 30, 1994...         3,335,165          2,334,232         0.28              (174,529)        (0.02 )           2,709,703
July 1, 1994 to
 September 30,
 1994...........         3,313,202          2,883,366         0.28            (1,594,966)        (0.15 )           1,288,400
October 1, 1994
 to December 31,
 1994                    3,319,643          2,989,373         0.28            (6,304,821)        (0.60 )          (3,315,448)
January 1, 1995
 to March 31,
 1995...........         3,300,526          2,905,171         0.28            12,336,610          1.18            15,241,781
April 1, 1995 to
June 30, 1995...         3,352,125          2,948,761         0.28               913,610          0.09             3,862,371
July 1, 1995 to
 September 30,
 1995...........         3,316,493          2,916,864         0.28             4,085,499          0.40             7,002,363
October 1, 1995
 to December 31,
 1995...........         3,319,567          2,922,388         0.28             6,327,515          0.60             9,249,903
 
<CAPTION>
                                                   DIVIDENDS & DISTRIBUTIONS
                                         COMMON SHARES                 PREFERRED SHARES*
                      PER                               PER                            PER              SHARE PRICE OF
  QUARTERLY          COMMON                           COMMON                         COMMON              COMMON STOCK
  PERIOD             SHARE            AMOUNT           SHARE          AMOUNT          SHARE          HIGH             LOW
<S>               <C>            <C>                <C>           <C>              <C>           <C>             <C>
January 1, 1994
 to March 31,
 1994...........  $     (1.43 )  $      2,224,516   $     0.22    $      418,936   $     0.04    $      15.375   $      13.750
April 1, 1994 to
June 30, 1994...         0.26           2,224,515         0.21           524,336         0.05           14.375          13.500
July 1, 1994 to
 September 30,
 1994...........         0.13           2,224,516         0.21           561,821         0.05           14.125          13.125
October 1, 1994
 to December 31,
 1994                   (0.32 )         2,224,517         0.22           704,695         0.07           13.750          11.500
January 1, 1995
 to March 31,
 1995...........         1.46           2,224,420         0.21           755,620         0.07           14.000          12.125
April 1, 1995 to
June 30, 1995...         0.37           2,224,528         0.22           754,250         0.07           14.500          13.750
July 1, 1995 to
 September 30,
 1995...........         0.68           2,224,495         0.21           689,804         0.07           14.375          13.500
October 1, 1995
 to December 31,
 1995...........         0.88           2,224,494         0.21           704,774         0.07           14.750          13.625
 
<CAPTION>
                     PERIOD
  QUARTERLY         END NET
  PERIOD          ASSET VALUE
<S>               <C>
January 1, 1994
 to March 31,
 1994...........  $      14.41
April 1, 1994 to
June 30, 1994...         14.40
July 1, 1994 to
 September 30,
1994............         14.25
October 1, 1994
 to December 31,
 1994                    13.66
January 1, 1995
 to March 31,
1995............         14.84
April 1, 1995 to
June 30, 1995...         14.92
July 1, 1995 to
 September 30,
1995............         15.32
October 1, 1995
 to December 31,
1995............         15.92
</TABLE>
 
- ------------
* For the year ended December 31, 1995, the average annualized rate paid to
  preferred shareholders was 3.72%.
 
                                       12
<PAGE>
- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                         REPORT OF INDEPENDENT AUDITORS
- --------------------------------------------------------------------------------
 
The Shareholders and
Board of Directors of
The BlackRock California Insured Municipal 2008 Term Trust Inc.:
 
   We have audited the accompanying statement of assets and liabilities of The
BlackRock California Insured Municipal 2008 Term Trust Inc., including the
portfolio of investments, as of December 31, 1995 and the related statement of
operations for the year then ended, the statement of changes in net investment
assets for each of the two years in the period then ended and the financial
highlights for each of the three years in the period then ended and for the
period September 28, 1992 (commencement of investment operations) to December
31, 1992. These financial statements and financial highlights are the
responsibility of the Trust's management. Our responsibility is to express an
opinion of 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 December
31, 1995, by correspondence with the custodian and brokers; where replies were
not received from brokers, we performed other auditing procedures. An audit also
includes assessing the accounting principles used and significant estimates made
by management, as well as evaluating the overall financial statement
presentation We believe that our audits provide a reasonable basis for our
opinion.
 
   In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of The BlackRock
California Insured Municipal 2008 Term Trust Inc. as of December 31, 1995, the
results of its operations, the changes in its net investment assets and the
financial highlights for the respective stated periods, in conformity with
generally accepted accounting principles.
 
/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
 
New York, New York
February 9, 1996
 
                                       13
<PAGE>
- --------------------------------------------------------------------------------
 
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                                TAX INFORMATION
- --------------------------------------------------------------------------------
 
   We are required by the Internal Revenue Code to advise you within 60 days of
the Trust's fiscal year end as to the federally tax-exempt interest dividends
received by you during such fiscal year. Accordingly, we are advising you that
all regular dividends paid by the Trust during the fiscal year were federally
tax-exempt interest dividends.
 
- --------------------------------------------------------------------------------
 
                             ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
   There have been no material changes in the Trust's investment objectives or
policies that have not been approved by the shareholders. There have been no
changes in the Trust's charter or by-laws. There have been no changes in the
principal risk factors associated with investment in the Trust. There have been
no changes in the persons who are primarily responsible for the day-to-day
management of the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
                           DIVIDEND REINVESTMENT PLAN
- --------------------------------------------------------------------------------
 
   Pursuant to the Trust's Dividend Reinvestment Plan (the "Plan"), shareholders
may elect to have all distributions of dividends and capital gains automatically
reinvested by State Street Bank & Trust Company (the "Plan Agent") in Trust
shares. Shareholders who do not participate in the Plan will receive all
distributions in cash paid by check in United States dollars mailed directly to
the shareholders of record (or if the shares are held in street or other nominee
name, then to the nominee) by the custodian, as dividend disbursing agent.
 
   The Plan Agent serves as agent for the shareholders in administering the
Plan. After the Trust declares a dividend or determines to make a capital gain
distribution, the Plan Agent will, as agent for the participants, receive the
cash payment and use it to buy Trust shares in the open market on the New York
Stock Exchange for the participants' accounts. The Trust will not issue shares
under the Plan.
 
   Participants in the Plan may withdraw from the Plan upon written notice to
the Plan Agent and will receive certificates for whole Trust shares and a cash
payment for any fraction of a Trust share.
 
   The Plan Agent's fees for the handling of the reinvestment of dividends and
distributions will be paid by the Trust. However, each participant will pay a
pro rata share of brokerage commissions incurred with respect to the Plan
Agent's open market purchases in connection with the reinvestment of dividends
and distributions. The automatic reinvestment of dividends and distributions
will not relieve participants of any federal income tax that may be payable on
such dividends or distributions.
 
   Experience under the Plan may indicate that changes are desirable.
Accordingly, the Trust reserves the right to amend or terminate the Plan as
applied to any dividend or distribution paid subsequent to written notice of the
change sent to all shareholders of the Trust at least 90 days before the record
date for the dividend or distribution. The Plan also may be amended or
terminated by the Plan Agent upon at least 90 days' written notice to all
shareholders of the Trust. All correspondence concerning the Plan should be
directed to the Plan Agent at (800) 699-1BFM. The address is on the front of
this report.
 
                                       14
<PAGE>
- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------
 
THE TRUST'S INVESTMENT OBJECTIVE
 
   The Trust's investment objective is to provide current income exempt from
regular Federal and California income tax and to return $15 per share (the
initial public offering price per share) to investors on or shortly before
December 31, 2008.
 
WHO MANAGES THE TRUST?
 
   BlackRock Financial Management, Inc. (BlackRock or the Adviser) is the
investment adviser for the Trust. BlackRock is a registered investment adviser
specializing in fixed income securities. Currently, BlackRock manages
approximately $34 billion of assets across the government, mortgage, corporate
and municipal sectors. These assets are managed on behalf of institutional and
individual investors in 21 closed-end funds traded on the New York or American
Stock Exchanges, several open-end funds and separate accounts for more than 80
clients in the U.S. and overseas. BlackRock is a subsidiary of PNC Asset
Management Group, Inc. which is a division of PNC Bank, N.A., the nation's
eleventh largest banking organization.
 
WHAT CAN THE TRUST INVEST IN?
 
   The Trust may invest in fixed income securities rated AAA. The Trust intends
to invest at least 80% of its total assets in California municipal obligations
insured as to the timely payment of principal and interest. The Trust may invest
up to 20% in uninsured California municipal obligations which are rated Aaa by
Moody's or AAA by S&P, or are determined by the Adviser to be of comparable
credit quality (guaranteed, escrowed or backed in trust).
 
WHAT IS THE ADVISER'S INVESTMENT STRATEGY?
 
   The Adviser will seek to meet the Trust's investment objective by managing
the assets of the Trust so as to return the initial offering price ($15 per
share) at maturity. The Trust will implement a conservative strategy that will
seek to closely match the maturity of the assets of the portfolio with the
future return of the initial investment at the end of 2008. At the Trust's
termination, BlackRock expects that the value of the securities which have
matured, combined with the value of the securities that are sold, if any will be
sufficient to return the initial offering price to investors. On a continuous
basis, the Trust will seek its objective by actively managing its assets
portfolio of California municipal obligations and retaining a small amount of
income each year.
 
   In addition to seeking the return of the initial offering price, the Adviser
also seeks to provide current income exempt from regular Federal and California
income tax to investors. The portfolio managers will attempt to achieve this
objective by investing in securities that provide competitive income. In
addition, leverage will be used (in an amount up to 35% of the portfolio assets)
to enhance the income of the portfolio. In order to maintain competitive yields
as the Trust approaches maturity and depending on market conditions, the Adviser
will attempt to purchase securities with call protection or maturities as close
to the Trust's maturity date as possible. Securities with call protection should
provide the portfolio with some degree of protection against reinvestment risk
during times of lower prevailing interest rates. Since the Trust's primary goal
is to return the initial offering price at maturity, any cash that the Trust
receives prior to its maturity date will be reinvested in securities with
maturities which coincide with the remaining term of the Trust. Since
shorter-term securities typically yield less than longer-term securities, this
strategy will likely result in a decline in the Trust's income over time. It is
important to note that the Trust will be managed so as to preserve the integrity
of the return of the initial offering price. If market conditions, such as high
interest rate volatility, force a choice between current income and risking the
return of the initial offering price, it is likely that the return of the
initial offering price will be emphasized.
 
                                       15
<PAGE>

HOW ARE THE TRUST'S SHARES PURCHASED AND SOLD? DOES THE TRUST PAY DIVIDENDS
REGULARLY?
 
   The Trust's shares are traded on the New York Stock Exchange which provides
investors with liquidity on a daily basis. Orders to buy or sell shares of the
Trust must be placed through a registered broker or financial advisor. The Trust
pays monthly dividends which are typically paid on the last business day of the
month. For shares held in the shareholder's name, dividends may be reinvested in
additional shares of the fund through the Trust's transfer agent, Boston
Financial Data Services. Investors who wish to hold shares in a brokerage
account should check with their financial advisor to determine whether their
brokerage firm offers dividend reinvestment services.
 
LEVERAGE CONSIDERATIONS IN A TERM TRUST
 
   Under current market conditions, leverage increases the income earned by the
Trust. The Trust employs leverage primarily through the issuance of preferred
stock. Leverage permits the Trust to borrow money at short-term rates and
reinvest that money in longer-term assets which typically offer higher interest
rates. The difference between the cost of the borrowed funds and the income
earned on the proceeds that are invested in longer term assets is the benefit to
the Trust from leverage. In general, the portfolio is typically leveraged at
approximately 35% of total assets.
 
   Leverage also increases the duration (or price volatility of the net assets)
of the Trust, which can improve the performance of the fund in a declining rate
environment, but can cause net assets to decline faster than the market in a
rapidly rising rate environment. BlackRock's portfolio managers continuously
monitor and regularly review the Trust's use of leverage and the Trust may
reduce, or unwind, the amount of leverage employed should BlackRock consider
that reduction to be in the best interests of the shareholders.
 
SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO TERM TRUSTS
 
   The Trust is intended to be a long-term investment and is not a short-term
trading vehicle.
 
   RETURN OF INITIAL INVESTMENT. Although the objective of the Trust is to
return its initial offering price upon termination, there can be no assurance
that this objective will be achieved.
 
   DIVIDEND CONSIDERATIONS. The income and dividends paid by the Trust are
likely to decline to some extent over the term of the Trust due to the
anticipated shortening of the dollar-weighted average maturity of the Trust's
assets.
 
   LEVERAGE. The Trust utilizes leverage through preferred stock which involves
special risks. The Trust's net asset value and market value may be more volatile
due to its use of leverage.
 
   MARKET PRICE OF SHARES. The shares of closed-end investment companies such as
the Trust trade on the New York Stock Exchange (NYSE symbol: BFC) and as such
are subject to supply and demand influences. As a result, shares may trade at a
discount or a premium to their net asset value.
 
   ILLIQUID SECURITIES. The Trust may invest in securities that are illiquid,
although under current market conditions the Trust expects to do so to only a
limited extent. Investing in these securities involves special risks.
 
   ANTITAKEOVER PROVISIONS. Certain antitakeover provisions will make a change
in the Trust's business or management more difficult without the approval of the
Trust's Board of Directors and may have the effect of depriving shareholders of
an opportunity to sell their shares at a premium above the prevailing market
price.
 
   MUNICIPAL OBLIGATIONS. Municipal obligations include debt obligations issued
by states, cities, and local authorities, and possessions and certain
territories of the United States to obtain funds for various public purposes,
including the construction of public facilities, the refinancing of outstanding
obligations and the obtaining of funds for general operating expenses and for
loans to other public institutions and facilities. The value of municipal debt
securities generally varies inversely with changes in prevailing market interest
rates. Depending on the amount of call protection that the securities in the
Trust have, the Trust may be subject to certain reinvestment risks in
environments of declining interest rates.
 
   ALTERNATIVE MINIMUM TAX (AMT). The Trust may invest in securities subject to
AMT. The Trust currently holds no securities that are subject to AMT.
 
                                       16
<PAGE>
- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                                    GLOSSARY
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                        <C>
CLOSED-END FUND:           Investment vehicle which initially offers a fixed number of shares and trades on a
                           stock exchange. The fund invests in a portfolio of securities in accordance with its
                           stated investment objectives and policies.
 
DISCOUNT:                  When a fund's net asset value is greater than its stock price the fund is said to be
                           trading at a discount.
 
DIVIDEND:                  Income generated by securities in a portfolio and distributed to shareholders after
                           the deduction of expenses. This Trust declares and pays dividends to common
                           shareholders on a monthly basis.
 
DIVIDEND REINVESTMENT:     Shareholders may have all dividends and distributions of capital gains automatically
                           reinvested into additional shares of a fund.
 
EMBEDDED CAP BONDS:        Also known as additional interest municipal bonds. These securities are intended to
                           protect the income that a fund earns through leverage from significant increases in
                           short-term rates. The coupon on these bonds will increase if short term rates rise
                           significantly.
 
MARKET PRICE:              Price per share of a security trading in the secondary market. For a closed-end
                           fund, this is the price at which one share of the fund trades on the stock exchange.
                           If you were to buy or sell shares, you would pay or receive the market price.
 
NET ASSET VALUE (NAV):     Net asset value is the total market value of all securities and other assets held by
                           the Trust, plus income accrued on its investments, minus any liabilities including
                           accrued expenses, divided by the total number of outstanding shares. It is the
                           underlying value of a single share on a given day. Net asset value for the Trust is
                           calculated weekly and published in Barron's and The New York Times on Saturday or
                           The Wall Street Journal each Monday.
 
PREMIUM:                   When a fund's stock price is greater than its net asset value, the fund is said to
                           be trading at a premium.
 
PREREFUNDED BONDS:         These securities are collateralized by U.S. Government securities which are held in
                           escrow and are used to pay principal and interest on the tax exempt issue and retire
                           the bond in full at the date indicated, typically at a premium to par.
</TABLE>
 
                                       17
<PAGE>
- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                          SUMMARY OF CLOSED-END FUNDS
- --------------------------------------------------------------------------------
 
TAXABLE TRUSTS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                              MATURITY
PERPETUAL TRUSTS                                                              STOCK SYMBOL      DATE
                                                                              ------------    --------
<S>                                                                           <C>             <C>
The BlackRock Income Trust Inc.                                                    BKT          N/A
The BlackRock North American Government Income Trust Inc.                          BNA          N/A
 
TERM TRUSTS
The BlackRock 1998 Term Trust Inc.                                                 BBT         12/98
The BlackRock 1999 Term Trust Inc.                                                 BNN         12/99
The BlackRock Target Term Trust Inc.                                               BTT         12/00
The BlackRock 2001 Term Trust Inc.                                                 BLK         06/01
The BlackRock Strategic Term Trust Inc.                                            BGT         12/02
The BlackRock Investment Quality Term Trust Inc.                                   BQT         12/04
The BlackRock Advantage Term Trust Inc.                                            BAT         12/05
The BlackRock Broad Investment Grade 2009 Term Trust Inc.                          BCT         12/09
</TABLE>
 
TAX-EXEMPT TRUSTS
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                              MATURITY
PERPETUAL TRUSTS                                                              STOCK SYMBOL      DATE
                                                                              ------------    --------
<S>                                                                           <C>             <C>
The BlackRock Investment Quality Municipal Trust Inc.                              BKN          N/A
The BlackRock California Investment Quality Municipal Trust Inc.                   RAA          N/A
The BlackRock Florida Investment Quality Municipal Trust                           RFA          N/A
The BlackRock New Jersey Investment Quality Municipal Trust Inc.                   RNJ          N/A
The BlackRock New York Investment Quality Municipal Trust Inc.                     RNY          N/A
 
TERM TRUSTS
The BlackRock Municipal Target Term Trust Inc.                                     BMN         12/06
The BlackRock Insured Municipal 2008 Term Trust Inc.                               BRM         12/08
The BlackRock California Insured Municipal 2008 Term Trust Inc.                    BFC         12/08
The BlackRock Florida Insured Municipal 2008 Term Trust                            BRF         12/08
The BlackRock New York Insured Municipal 2008 Term Trust Inc.                      BLN         12/08
The BlackRock Insured Municipal Term Trust Inc.                                    BMT         12/10
</TABLE>
 
                     IF YOU WOULD LIKE FURTHER INFORMATION
                    PLEASE CALL BLACKROCK AT (800) 227-7BFM
                    OR CONSULT WITH YOUR FINANCIAL ADVISOR.
 
                                       18
<PAGE>
- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                                  AN OVERVIEW
- --------------------------------------------------------------------------------
 
   BlackRock Financial Management, Inc. ("BlackRock"), is a registered
investment adviser which specializes in managing high quality fixed income
securities, both taxable and tax-exempt. BlackRock currently manages
approximately $34 billion of assets across the government, mortgage, corporate
and municipal sectors. These assets are managed on behalf of institutional and
individual investors in 21 closed-end funds traded on the New York or American
Stock Exchanges, several open-end funds and over 80 institutional clients in the
United States and overseas. BlackRock's institutional investor base includes
Chrysler Corporation Master Retirement Trust, General Retirement System of the
City of Detroit, State Treasurer of Florida, General Electric Pension Trust and
Unisys Corporation Master Trust.
 
   BlackRock was formed in April 1988 by fixed income professionals who sought
to create an asset management firm specializing in managing fixed income
securities for individual and institutional investors. The professionals at
BlackRock have extensive experience creating, analyzing and trading a variety of
fixed income instruments, including the most complex structured securities. In
fact, individuals at BlackRock are responsible for many of the major innovations
in the mortgage-backed and asset-backed securities markets, including the
creation of the CMO, the floating rate CMO, the senior/subordinated pass-through
and the multi-class asset-backed security.
 
   BlackRock is unique among asset management and advisory firms in the
significant emphasis it places on the development of proprietary analytical
capabilities. A quarter of the professionals at BlackRock work full-time in the
design, maintenance and use of such systems which are otherwise not generally
available to investors. BlackRock's proprietary analytical tools are used for
evaluating, investing in and designing investment strategies and portfolios of
fixed income securities, including mortgage securities, corporate debt
securities or tax-exempt securities and a variety of hedging instruments.
 
   BlackRock has developed investment products which respond to investors' needs
and has been responsible for several major innovations in closed-end funds.
BlackRock introduced the first closed-end mortgage fund, the first taxable and
tax-exempt closed-end funds to offer a finite term, the first closed-end fund to
achieve a AAAf rating by Standard & Poor's, and the first closed-end fund to
invest primarily in North American Government securities. BlackRock's closed-end
funds currently have dividend reinvestment plans which are designed to provide
an ongoing source of demand for the stock in the secondary market. BlackRock
manages a ladder of alternative investment vehicles, with each fund having
specific investment objectives and policies.
 
   In view of our continued desire to provide a high level of service to all our
shareholders, BlackRock maintains a toll-free number for your questions. The
number is (800) 227-7BFM (7236). We encourage you to call us with any questions
you may have about your BlackRock funds and thank you for the continued trust
you place in our abilities.
 
                     IF YOU WOULD LIKE FURTHER INFORMATION
                    PLEASE CALL BLACKROCK AT (800) 227-7BFM
                    OR CONSULT WITH YOUR FINANCIAL ADVISOR.
 
                                       19
<PAGE>

["Black Rock" logo]

DIRECTORS
Laurence D. Fink, Chairman
Andrew F. Brimmer         
Richard E. Cavanagh       
Kent Dixon                
Frank J. Fabozzi          
James Grosfeld            
James Clayburn La Force, Jr.
Ralph L. Schlosstein      

OFFICERS                                              THE [LOGO]
Ralph L. Schlosstein, President                       
Keith T. Anderson, Vice President                     
Michael C. Huebsch, Vice President                    CALIFORNIA INSURED
Robert S. Kapito, Vice President                      
Kevin Klingert, Vice President                        MUNICIPAL 2008
Richard M. Shea, Vice President/Tax                   
Henry Gabbay, Treasurer                               TERM TRUST INC.
James Kong, Assistant Treasurer                       
Karen H. Sabath, Secretary                            ----------------------
                                                      
INVESTMENT ADVISER                                    ANNUAL REPORT
BlackRock Financial Management, Inc.                  
345 Park Avenue                                       DECEMBER 31, 1995
New York, NY 10154                                    
(800) 227-7BFM                                        

ADMINISTRATOR
Princeton Administrators L.P.
800 Scudders Mill Road
Plainsboro, NJ 08536
(800) 688-0928

CUSTODIAN AND TRANSFER AGENT
State Street Bank and Trust Company
One Heritage Drive
North Quincy, MA 02171
(800) 699-1BFM

AUCTION AGENT
Bankers Trust Company
4 Albany Street
New York, NY 10006

INDEPENDENT AUDITORS
Deloitte & Touche LLP
Two World Financial Center
New York, NY 10281-1434                             [PICTURE]

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom
919 Third Avenue
New York, NY 10022
 
   This report is for shareholder information.
This is not a prospectus intended for use in the
purchase or sale of any securities.
 
        THE BLACKROCK CALIFORNIA INSURED
         MUNICIPAL 2008 TERM TRUST INC.
       c/o Princeton Administrators L.P.
             800 Scudders Mill Road
              Plainsboro, NJ 08536
                 (800) 227-7BFM
 
                             09247G 10 8
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