BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC
N-30D, 1999-08-25
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- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS

                          REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------



                                                                   July 31, 1999

Dear Shareholder:

    Since the Trust's last report,  interest rates rose sharply as U.S. economic
growth remained strong, labor markets tightened and international  markets began
to recover. In light of these factors, the Federal Reserve's Federal Open Market
Committee increased short-term interest rates by 25 basis points in June, citing
a concern that inflation might start to accelerate.

    In tandem  with the Fed's  recent  rate  tightening,  BlackRock  has taken a
defensive interest rate stance. With the Treasury curve currently pricing in the
possibility  of another Fed  tightening  by year-end,  we believe that  interest
rates will trade in a relatively  narrow range until the economy  shows signs of
slowing.

    This report  contains  comments  from your Trust's  managers  regarding  the
markets  and  portfolio  in  addition  to  the  Trust's  semi-annual   financial
statements  and a detailed  portfolio  listing.  We thank you for your continued
investment in the Trust.

Sincerely,


/s/Laurence D. Fink                            /s/Ralph L. Schlosstein
- -------------------                            -----------------------
Laurence D. Fink                               Ralph L. Schlosstein
Chairman                                       President


                                       1

<PAGE>


                                                                   July 31, 1999
Dear Shareholder:

      We are  pleased  to  present  the  semi-annual  report  for The  BlackRock
California  Insured  Municipal  2008 Term Trust Inc.  ("the  Trust") for the six
months ended June 30, 1999. We would like to take this opportunity to review the
Trust's   stock  price  and  net  asset  value  (NAV)   performance,   summarize
developments in the fixed income markets and discuss recent portfolio management
activity.

      The Trust is a  non-diversified  closed-end  bond fund  whose  shares  are
traded on the New York  Stock  Exchange  under the  symbol  "BFC."  The  Trust's
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 high
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 changes in the Trust's stock price and net
asset value over the past six months:

<TABLE>
<CAPTION>
                                        -----------------------------------------------------------------------------
                                                 6/30/99      12/31/98        CHANGE          HIGH           LOW
- ---------------------------------------------------------------------------------------------------------------------
<S>                                             <C>            <C>            <C>           <C>           <C>
  STOCK PRICE                                   $15.4375       $15.9375       (3.14%)       $16.00        $15.25
- ---------------------------------------------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)                         $16.43         $17.12         (4.03%)       $17.31        $16.41
- ---------------------------------------------------------------------------------------------------------------------

</TABLE>

THE FIXED INCOME MARKETS

      The past six months have witnessed  continued  rapid expansion of the U.S.
economy.  GDP growth for the second  quarter of 1999 is  estimated  at an annual
rate of 3.5%-4%,  far exceeding  the  historical  non-inflationary  level of 2%.
While  BlackRock  believes that growth may slow down in the second half of 1999,
we anticipate  GDP to remain above 3% for the year. In spite of strong  domestic
economic growth,  inflationary  forces continue to remain contained;  still, the
Federal  Reserve chose to raise its target for the federal funds rate from 4.75%
to 5.00% at its June meeting. The Fed cited an easing of financial strain, tight
labor markets and a firming of foreign economies in the release accompanying the
move. The Fed dropped its tightening bias to a neutral bias, which should reduce
the  likelihood  of  another  hike  at the  August  24th  meeting.  However,  an
additional  25-50 basis points of  tightening  by year end is  possible,  as the
combination  of a very strong  domestic  economy and an  improving  situation in
Europe and Japan may allow for tighter monetary policy.

      U.S. Treasury securities  dramatically reversed their fourth quarter gains
in the  first  half of 1999.  The  yield of the  10-Year  Treasury  posted a net
decline of 118 basis points (1.18%), beginning 1999 at 4.65% and closing on June
30, 1999 at 5.78%.  Strong  economic  numbers led the Federal Reserve to adopt a
tightening bias on May 18, 1999 and ultimately raised interest rates by 25 basis
points  on June 30,  1999.  The  Federal  Reserve  eased  rates by 0.75% in 1998
because of the  global  financial  crisis  but cited in their June 1999  meeting
"Since  then much of the  financial  strain has eased,  foreign  economies  have
firmed and economic  activity in the U.S. has moved forward at a brisk pace." We
anticipate Treasuries will trade in a relatively narrow range for the balance of
1999 unless the Fed takes further action.


                                       2
<PAGE>


      Municipal bonds  outperformed  the taxable domestic bond market during the
past six months,  returning  -0.90% (as measured by the LEHMAN  MUNICIPAL INDEX)
versus the LEHMAN AGGREGATE  INDEX'S -1.37% on a pre-tax basis.  Municipal bonds
continue to appear attractive  relative to Treasuries on a long-term  historical
basis,  and we believe  that reduced  Treasury  supply and  increased  crossover
activity  should keep ratios at higher  than  normal  levels.  Supply and demand
technicals  continue to improve in the  municipal  market as supply has declined
23% in the first half of 1999 from last year.  Much of the drop in issuance  can
be attributed to the plunge in refunding supply, which is down nearly 50% versus
last year.  Retail investors have been adding  municipals to their portfolios at
an aggressive  pace,  which should result in the second  consecutive year of net
positive  cash flows into mutual  funds after having  negative  flows during the
previous four years. Due to the factors  mentioned above, we believe  municipals
remain a compelling investment opportunity going forward.

      California's  economy  continues to grow at a more moderate  pace. In 1998
the  impact  of the  Asian  recession  was felt in  specific  industry  sectors,
overall,  however,  the economy  continued to expand.  Aerospace and electronics
manufacturing employment peaked in March and then by November lost almost 15,000
jobs. Demand for computer services and software, however, continues to be strong
with annual  growth  estimated  between 10% and 12% for 1999.  Gains in computer
services  fully offset the 1998 drop in technology  manufacturing.  Unemployment
for April 1999 was 5.6%,  down from 5.9% a year ago. This is the lowest rate for
the State since July 1990.  Residential  construction  continues to boom jumping
37.2% for the same period.

      Good  economic  news has had a positive  impact  upon the  State's  fiscal
picture. Unaudited results for the fiscal year ending June 30, 1999 indicate the
General  Fund  operations  produced a surplus of $2.1  billion.  Some concern is
developing  that  revenues  are not meeting  budget in the current  fiscal year.
California's  improved  liquidity position should,  however,  allow the State to
weather the current volatility in the revenue stream.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

      The Trust's portfolio is actively managed to diversify exposure to various
sectors,  issuers,  revenue sources and security types.  BlackRock's  investment
strategy  emphasizes  a  relative  value  approach,  which  allows  the Trust to
capitalize  upon  changing  market  conditions  by rotating  municipal  sectors,
credits  and  coupons.  Additionally,  the  Trust  emphasizes  securities  whose
maturity dates match the termination date of the Trust.  Trading activity in the
Trust  remained  low during the period,  as the market  prices of a  significant
portion of the  portfolio's  bonds are currently  above the prices at which they
were bought. A bond sold at a gain would result in the Trust realizing a capital
gain, which may require a taxable distribution. Since one of the Trust's primary
investment  objectives  is  to  pay  out  TAX-EXEMPT  income,  we  believe  that
restructuring  the portfolio in a higher interest rate  environment  remains the
most prudent strategy.

      Additionally,  the  Trust  employs  leverage  to  enhance  its  income  by
borrowing at  short-term  municipal  rates and  investing the proceeds in longer
maturity  issues  that have  higher  yields.  The  degree to which the Trust can
benefit  from its use of  leverage  may affect its  ability to pay high  monthly
income.  At the end of the semi-annual  period,  the Trust's leverage amount was
31% of total assets.  During the past six months,  the Trust's  borrowing  costs
have remained favorable.

      As municipal credit spreads remained tight during the reporting period, we
continued to emphasize  higher rated  securities over the lower rated investment
grade  sector.  We believe that credit  spreads  will return to more  historical
levels in the near  future  and as such the Trust  should  be  rewarded  for its
higher  credit  quality bias.  The Trust has continued its bias towards  premium
coupon  securities  over discount  priced  securities,  as premium coupons offer
better price  performance  during  periods of rising  interest rates and similar
performance to discounts when interest rates fall.

                                       3

<PAGE>

      The  following  chart  compares the Trust's  current and December 31, 1999
asset composition:
- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
- --------------------------------------------------------------------------------
 SECTOR                                    JUNE 30, 1999     DECEMBER 31, 1998
- --------------------------------------------------------------------------------
 Lease Revenue & Certificates
   of Participation                              26%                 26%
- --------------------------------------------------------------------------------
 Transportation                                  20%                 20%
- --------------------------------------------------------------------------------
 Water & Sewer                                   20%                 20%
- --------------------------------------------------------------------------------
 County, City & State                            12%                 11%
- --------------------------------------------------------------------------------
 Utility/Power                                   9%                   9%
- --------------------------------------------------------------------------------
 Hospital                                        5%                   5%
- --------------------------------------------------------------------------------
 Special District                                3%                   3%
- --------------------------------------------------------------------------------
 Education                                       2%                   2%
- --------------------------------------------------------------------------------
 Tax Revenue                                     2%                   2%
- --------------------------------------------------------------------------------
 Other                                           1%                   2%
- --------------------------------------------------------------------------------

      We look forward to managing  the Trust to benefit  from the  opportunities
available in the fixed income markets and to meet its investment objectives.  We
thank you for your investment in the BlackRock California Insured Municipal 2008
Term  Trust  Inc.  Please  feel free to contact  our  marketing  center at (800)
227-7BFM (7236) if you have specific  questions which were not addressed in this
report.

Sincerely,


/s/Robert S. Kapito                        /s/Kevin M. Klingert
- ------------------                         --------------------
Robert S. Kapito                           Kevin M. Klingert
Vice Chairman and                          Managing Director and
 Portfolio Manager                           Portfolio Manager
BlackRock Financial Management, Inc.       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 6/30/99:                                $15.4375
- --------------------------------------------------------------------------------
Net Asset Value as of 6/30/99:                                    $16.43
- --------------------------------------------------------------------------------
Yield on Closing Stock Price as of 6/30/99 ($15.4375)1:             5.00%
- --------------------------------------------------------------------------------
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.

                                       4
<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
PORTFOLIO OF INVESTMENTS JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>

- -------------------------------------------------------------------------------------------------------------------------------
           PRINCIPAL
            AMOUNT                                                                           OPTION CALL              VALUE
  RATING*    (000)                                 DESCRIPTION                                PROVISIONS+            (NOTE 1)
- -------------------------------------------------------------------------------------------------------------------------------
<S>        <C>          <C>                                                                  <C>                  <C>
                        LONG-TERM INVESTMENTS--142.4%
                        California Hlth. Fac. Fin. Auth. Rev.,
   AAA     $ 6,850       Marin Gen. Hosp., Ser. A, 5.75%, 8/01/09, FSA .........             8/03 at 102          $ 7,228,600
   AAA       2,000       Sutter Hlth. Care Sys., 5.70%, 8/15/09, MBIA ..........             8/06 at 102            2,119,840
                        California St., G.O.,

   AAA       3,000       5.50%, 4/01/09, MBIA ..................................            No Opt. Call            3,165,000
   AAA       2,000       6.25%, 9/01/08, FGIC ..................................            No Opt. Call            2,222,660
   AAA      15,000       6.30%, 9/01/08, MBIA ..................................            No Opt. Call           16,725,150
                        California St. Pub. Wks. Brd.,
   AAA       2,100       Energy Efficiency, Ser. A, 5.625%, 10/01/08, AMBAC ....             10/05 at 102           2,227,134
   AAA      10,255++     Lease Rev., 6.40%, 9/01/01, MBIA ......................                  N/A              10,967,517
   AAA       9,165      California St. Wide Cmnty. Dev. Auth., Lease Rev.,
                         6.00%, 10/01/10, AMBAC ................................             10/02 at 102           9,698,495
   AAA       2,600      Castaic Lake Wtr. Agcy. C.O.P., Wtr. Sys. Impvt. Proj.,
                         Ser. A, 7.25%, 8/01/10, MBIA ..........................            No Opt. Call            3,099,122
   AAA       5,515++    Central Coast Wtr. Auth. Rev., St. Wtr. Proj.
                         Reg. Fac., 6.40%, 10/01/02, AMBAC .....................                  N/A               5,997,342
   AAA       5,500      Clovis Unified Sch. Dist., Ser. B, Zero Coupon,
                         8/01/08, FGIC .........................................            No Opt. Call            3,567,630
   AAA      13,740      East Bay Mun. Utils. Dist., Wtr. Sys.
                         Rev., 6.00%, 6/01/09, AMBAC ...........................              6/02 at 102          14,512,600
   AAA       4,025      Elsinore Valley Mun. Wtr. Dist., C.O.P.,
                         Ser. A, 6.00%, 7/01/09, FGIC ..........................            No Opt. Call            4,379,562
                        Los Angeles Cnty. Asset Leasing Corp. Rev., AMBAC,
   AAA       2,910       5.95%, 12/01/07 .......................................            No Opt. Call            3,183,831
   AAA       8,090       6.00%, 12/01/08 .......................................            No Opt. Call            8,864,941
   AAA       8,600       6.05%, 12/01/09 .......................................            No Opt. Call            9,453,636
   AAA       1,000      Los Angeles Elec. Rev., 5.75%, 9/01/12, FGIC ...........              9/03 at 102           1,050,950
   AAA       5,765++    Los Angeles Wastewtr. Sys. Rev.,
                         Ser. B, 6.25%, 6/01/02, AMBAC .........................                  N/A               6,208,098
   AAA       3,075++    Marysville Hosp. Rev., Fremont-Rideout Hlth.
                         Group, Ser. A, 6.20%, 1/01/03, AMBAC ..................                  N/A               3,325,705
   AAA       8,000++    Modesto Irrig. Dist. Fin. Rev., Domestic Wtr.
                         Proj., Ser. A, 6.00%, 9/01/02, AMBAC ..................                  N/A               8,592,960
                        Northern California Pwr. Agcy., Multiple
                         Cap. Fac. Rev., Ser. A, MBIA,
   AAA         430++     6.40%, 8/01/02 ........................................                  N/A                 466,219
   AAA         570       6.40%, 8/01/07 ........................................              8/02 at 102             612,351
   AAA       1,280++     6.50%, 8/01/02 ........................................                  N/A               1,391,475
   AAA       1,725       6.50%, 8/01/08 ........................................              8/02 at 102           1,850,839
   AAA       1,000      Orange Cnty. Local Trans. Auth. Sales Tax Rev.,
                         6.00%, 2/15/09, MBIA ..................................            No Opt. Call            1,089,390
   AAA       5,600      Pittsburg Redev. Agcy. Tax Alloc. Rev.,
                         Los Medanos Cmnty. Dev. Proj.,
                         5.50%, 8/01/07, FGIC ..................................              8/02 at 102           5,838,952
   AAA       3,075++    Riverside Cnty., Trans. Comm. Sales Tax Rev., Ser. A,
                          6.50%, 6/01/01, MBIA .................................                  N/A               3,279,026
                        Sacramento Mun. Utils. Dist., Elec. Rev., Ser. C,
   AAA       2,500       5.75%, 11/15/07, MBIA .................................             11/02 at 102           2,641,700
   AAA       6,250       5.75%, 11/15/08, FGIC .................................             11/02 at 102           6,570,512
   AAA       4,700       5.75%, 11/15/09, MBIA .................................             11/02 at 102           4,937,773
   AAA       5,700      San Bernardino Cnty. C.O.P., Arpt. Impvt.,
                          6.00%, 7/01/07, MBIA .................................              7/02 at 102           6,049,353
   AAA       5,000      San Bernardino Cnty. Trans. Auth., Sales Tax Rev.,
                         6.00%, 3/01/10, FGIC ..................................              3/02 at 102           5,328,600
                        San Diego Cnty. Regl. Trans. Cmnty. Sales
                         Tax Rev., Ser. A,
   AAA       2,500       6.00%, 4/01/08, FGIC ..................................                  ETM               2,675,500
   AAA       7,830       6.00%, 4/01/08, MBIA ..................................              4/01 at 102           8,379,666
   AAA       7,650      San Diego Redev. Agcy. Rev., Tax Allocation-
                         Centre City Proj., 6.00%, 9/01/08, AMBAC ..............              9/02 at 102           8,090,717
                        San Jose Arpt. Rev., MBIA,
   AAA       8,010       6.00%, 3/01/09 ........................................              3/03 at 102           8,487,636
   AAA       3,000       6.00%, 3/01/10 ........................................              3/03 at 102           3,183,060
   AAA       3,755       6.10%, 3/01/07 ........................................              3/03 at 102           4,029,416

   AAA       2,865++    Santa Clara Cnty. Fin. Auth., Fac. Replacement Proj.,
                         Ser. A, 6.50%, 11/15/04, AMBAC ........................                  N/A               3,209,230

   AAA       2,820      Santa Rosa Wtr. Rev., Ser. B, 6.20%, 9/01/09, FGIC .....              9/02 at 101.5         2,986,606
   AAA       5,000      So. California Rapid Trans. Dist., C.O.P., Workers
                         Comp. Fund, 6.00%, 7/01/10, MBIA ......................              1/01 at 102.5         5,222,150
</TABLE>


                       See Notes to Financial Statements.

                                       5
<PAGE>
<TABLE>
<CAPTION>

- -------------------------------------------------------------------------------------------------------------------------------
           PRINCIPAL
            AMOUNT                                                                           OPTION CALL              VALUE
  RATING*    (000)                                 DESCRIPTION                                PROVISIONS+            (NOTE 1)
- -------------------------------------------------------------------------------------------------------------------------------
<S>        <C>          <C>                                                                  <C>                  <C>
                        So. California Rapid Trans. Dist. Rev., Spec.
                         Benefit Assmt. Dist. A1, AMBAC,
   AAA     $ 5,750       5.50%, 9/01/09                                                       9/02 at 100         $ 5,881,272
   AAA       5,500       6.00%, 9/01/08                                                       9/02 at 102           5,816,855
   AAA       8,500      Sonoma Cnty. C.O.P., Cap. Rites-Detention Fac., 6.00%,
                         11/15/10, AMBAC                                                     11/02 at 102           9,006,260
                        Univ. of California Rev., Multi-Purpose Projs.,

   AAA       2,000++     Ser. B-1989, 6.80%, 9/01/99, AMBAC                                       N/A               2,050,840
   AAA       2,000       Ser. F-1989, 5.00%, 9/01/11, FGIC                                    9/06 at 101           1,997,360
   AAA       3,460++    West and Central Basin Fin. Auth. Rev., AMBAC,
                         6.125%, 8/01/02                                                          N/A               3,724,240
   AAA       2,160      West Sacramento Fin. Auth. Rev., Wtr. Sys. Impvt.,
                         5.25%, 8/01/08, FGIC                                                 8/02 at 102           2,219,076
                                                                                                                 ------------
                        TOTAL LONG-TERM INVESTMENTS (COST $224,832,727)                                           243,606,847
                                                                                                                 ------------

                        SHORT-TERM INVESTMENTS**--0.9%

   A-1+        400      California Hlth. Fac. Fin. Auth. Rev., Sutter Hlth. Care Sys.,
                         Ser. A, 2.90%, 7/01/99, FRDD                                             N/A                 400,000
   A-1+        900      Irvine California Impvt., 2.90%, 7/01/99, FRDD                            N/A                 900,000
   A-1+        150      Irvine Ranch Wtr. Dist., 2.90%, 7/01/99, FRDD                             N/A                 150,000
                                                                                                                 ------------
                        TOTAL SHORT-TERM INVESTMENTS (COST $1,450,000)                                              1,450,000
                                                                                                                 ------------
                        TOTAL INVESTMENTS--143.3% (COST $226,282,727)                                             245,056,847

                        Other assets in excess of liabilities--2.3%                                                 3,960,209
                        Liquidation value of preferred stock--(45.6)%                                             (78,000,000)
                                                                                                                 ------------
                        NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100%                                       $171,017,056
                                                                                                                 ============
</TABLE>

- ----------
 * Rating: Using the higher of Standard & Poor's, Moody's or Fitch's rating.
** For  purposes  of  amortized  cost  valuation,  the  maturity  date of  these
   instruments  is  considered  to be the  earlier of the next date on which the
   security  can be  redeemed  at par,  or the next  date on  which  the rate of
   interest is adjusted.
 + 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.
++ This bond is prerefunded. See glossary for definition.

- --------------------------------------------------------------------------------
         THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:

 AMBAC -- American Municipal Bond Assurance Corporation
C.O.P. -- Certificate of Participation
   ETM -- Escrowed to maturity
  FGIC -- Financial Guaranty Insurance Company
  FRDD -- Floating Rate Daily Demand**
   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
JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------

ASSETS

Investments, at value (cost $226,282,727)
  (Note 1) ................................................         $245,056,847
Cash ......................................................               42,850
Interest receivable .......................................            3,731,945
Receivable for investments sold ...........................              500,000
Other assets ..............................................               11,144
                                                                    ------------
                                                                     249,342,786
                                                                    ------------

LIABILITIES
Dividends payable-preferred stock .........................              116,314
Investment advisory fee payable (Note 2) ..................               73,665
Administration fee payable (Note 2) .......................               21,047
Other accrued expenses ....................................              114,704
                                                                    ------------
                                                                         325,730
                                                                    ------------
NET INVESTMENT ASSETS .....................................         $249,017,056
                                                                    ============
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 .....................            7,519,036
  Net unrealized appreciation .............................           18,774,120
                                                                    ------------
  Net investment assets, June 30, 1999 ....................         $249,017,056
                                                                    ============
  Net assets applicable to common
    shareholders ..........................................         $171,017,056
                                                                    ============
Net asset value per common share:
  ($171,017,056 / 10,407,093 shares of
  common stock issued and outstanding) ....................               $16.43
                                                                          ======



<PAGE>


- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED
MUNICIPAL 2008 TERMTRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------

NET INVESTMENT INCOME

Income
  Interest and discount earned .............................        $ 6,951,393
                                                                    -----------
Operating expenses
  Investment advisory ......................................            445,883
  Administration ...........................................            127,395
  Auction agent ............................................            106,000
  Custodian ................................................             44,000
  Reports to shareholders ..................................             28,000
  Directors ................................................             21,000
  Audit ....................................................             15,000
  Transfer agent ...........................................             10,000
  Legal ....................................................              6,500
  Miscellaneous ............................................             30,269
                                                                    -----------
  Total expenses ...........................................            834,047
                                                                    -----------
Net investment income ......................................          6,117,346
                                                                    -----------

UNREALIZED LOSS ON
INVESTMENTS (NOTE 3)

  Net change in unrealized appreciation on
    investments ............................................         (8,165,314)
                                                                    -----------

NET DECREASE IN NET INVESTMENT

ASSETS RESULTING FROM OPERATIONS ...........................        $(2,047,968)
                                                                    ===========

See Notes to Financial Statements.

                                        7
<PAGE>


- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
STATEMENTS OF CHANGES INNET INVESTMENT ASSETS (UNAUDITED)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                                                 SIX MONTHS ENDED             YEAR ENDED
                                                                                     JUNE 30,                DECEMBER 31,
                                                                                       1999                     1998
                                                                                   ------------              ------------
INCREASE (DECREASE) IN NET INVESTMENT ASSETS
OPERATIONS:

<S>                                                                               <C>                       <C>
  Net investment income ..............................................            $   6,117,346             $  12,234,667
  Net change in unrealized appreciation on investments ...............               (8,165,314)                2,624,041
                                                                                  -------------             -------------
    Net increase (decrease) in net investment
      assets resulting from operations ...............................               (2,047,968)               14,858,708
                                                                                  -------------             -------------
DIVIDENDS:
  To common shareholders from net investment income ..................               (4,019,661)               (8,039,335)
  To preferred shareholders from net investment income ...............               (1,049,272)               (2,396,026)
                                                                                  -------------             -------------
    Total dividends ..................................................               (5,068,933)              (10,435,361)
                                                                                  -------------             -------------
        Total increase (decrease) ....................................               (7,116,901)                4,423,347

NET INVESTMENT ASSETS

Beginning of period ..................................................              256,133,957               251,710,610
                                                                                  -------------             -------------
End of period ........................................................            $ 249,017,056             $ 256,133,957
                                                                                  =============             =============

</TABLE>

                       See Notes to Financial Statements.

                                       8
<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                        SIX MONTHS ENDED                   YEAR ENDED DECEMBER 31,
                                                            JUNE 30,    ------------------------------------------------------------
                                                             1999       1998          1997         1996         1995         1994
                                                             ----       ----          ----         ----         ----         ----
PER COMMON SHARE OPERATING
   PERFORMANCE:
<S>                                                        <C>          <C>          <C>          <C>          <C>          <C>
Net asset value, beginning of the period ..........        $17.12       $16.69       $15.86       $15.92       $13.66       $16.09
                                                           ------       ------       ------       ------       ------       ------
  Net investment income ...........................          0.59         1.18         1.15         1.11         1.12         1.12
  Net realized and unrealized
    gain (loss) on investments ....................         (0.79)        0.25         0.69        (0.16)        2.27        (2.48)
                                                           ------       ------       ------       ------       ------       ------
Net increase (decrease) from
  investment operations ...........................         (0.20)        1.43         1.84         0.95         3.39        (1.36)
                                                           ------       ------       ------       ------       ------       ------
Dividends and distributions:
  Dividends from net investment income to:
    Common shareholders ...........................         (0.39)       (0.77)       (0.77)       (0.77)       (0.85)       (0.86)
    Preferred shareholders ........................         (0.10)       (0.23)       (0.24)       (0.24)       (0.28)       (0.21)
  Distributions from net realized
    gain on investments to:
    Common shareholders ...........................            --           --           --           **           --           --
    Preferred shareholders ........................            --           --           --           **           --           --
  Distributions in excess of net realized
   gain on investments to:
    Common shareholders ...........................            --           --           --           **           **           --
    Preferred shareholders ........................            --           --           --           **           **           --
                                                           ------       ------       ------       ------       ------       ------
Total dividends and distributions .................         (0.49)       (1.00)       (1.01)       (1.01)       (1.13)       (1.07)
                                                           ------       ------       ------       ------       ------       ------

Capital charge with respect
  to issuance of shares ...........................            --           --           --           --           --          ***
                                                           ------       ------       ------       ------       ------       ------
Net asset value, end of period* ...................        $16.43       $17.12       $16.69       $15.86       $15.92       $13.66
                                                           ======       ======       ======       ======       ======       ======
Market value, end of period* ......................        $15.43       $15.94       $15.25       $14.63       $13.63       $12.00
                                                           ======       ======       ======       ======       ======       ======
TOTAL INVESTMENT RETURN+ ..........................         (0.74%)       9.77%        9.90%       13.67%       20.57%      (15.59%)
                                                           ======       ======       ======       ======       ======       ======
RATIOS TO AVERAGE NET ASSETS OF
  COMMON SHAREHOLDERS:++

Expenses ..........................................          0.95%+++     0.91%        0.98%        1.03%        1.02%        1.08%
Net investment income before
  preferred stock dividends .......................          6.97%+++     6.96%        7.11%        7.11%        7.46%        7.70%
Preferred stock dividends .........................          1.20%+++     1.36%        1.48%        1.56%        1.85%        1.46%
Net investment income available
  to common shareholders ..........................          5.77%+++     5.60%        5.63%        5.55%        5.61%        6.24%
SUPPLEMENTAL DATA:

Average net assets of common
 shareholders (in thousands) ......................      $176,915     $175,760     $167,984     $161,839     $156,774     $151,669
Portfolio turnover ................................             0%           0%           0%           3%          13%          17%
Net assets of common
 shareholders, end of period
  (in thousands) ..................................      $171,017     $178,134     $173,711     $165,038     $165,719     $142,165
Preferred stock outstanding
 (in thousands) ...................................      $ 78,000     $ 78,000     $ 78,000     $ 78,000     $ 78,000     $ 78,000
Asset coverage per share
  of preferred stock,
  end of period# ..................................      $ 79,813     $ 82,094     $ 80,677     $ 77,897     $ 78,115     $141,131

</TABLE>

- ----------
  *  Net asset value and market value are published in BARRON'S  each  Saturday,
     THE NEW YORK TIMES and THE WALL STREET JOURNAL each Monday.
 **  Actual amount paid to preferred  shareholders was $0.00136 per common share
     for the year  ended  December  31,  1996,  and to common  shareholders  was
     $0.004363  per share for the year ended  December 31, 1996.  Actual  amount
     paid  in  excess  of  net  realized  gain  on   investments   to  preferred
     shareholders  was $0.0004 and $0.0007 per common  share for the years ended
     December 31, 1996 and 1995,  respectively,  and to common  shareholders was
     $0.0013 and $0.0021  per share for the years  ended  December  31, 1996 and
     1995, respectively.
***  Actual amount was $0.00006 per common share.
  #  A stock split occurred 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  price  on the  last  day  of the  period  reported.  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 returns for periods of less than one year are not annualized.
 ++  Ratios are  calculated  on the basis of income and expenses  applicable  to
     both the  common and  preferred  shares,  and  preferred  stock  dividends,
     relative to the average net assets of common shareholders.
+++  Annualized

The information above represents the unaudited operating  performance data for a
share of common stock outstanding,  total investment  return,  ratios to average
net  assets  and  other  supplemental  data  for  the  periods  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 (UNAUDITED)
- --------------------------------------------------------------------------------
NOTE 1. ORGANIZATION & 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
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.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME:  Securities  transactions  are
recorded  on the trade  date.  Realized  and  unrealized  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  substantially  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
realized short-term capital gains and other sources, if necessary. Net long-term
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.

ESTIMATES:  The preparation of financial statements in conformity with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting  period.  Actual  results could differ from those  estimates.

NOTE 2. AGREEMENTS

The  Trust  has  an  Investment  Advisory  Agreement  with  BlackRock  Financial
Management,  Inc.  (the  "Adviser"),  a  wholly-owned  corporate  subsidiary  of
BlackRockAdvisors,  Inc.,  which is an  indirect  majority-owned  subsidiary  of
PNCBank,  N.A., 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.

NOTE 3. PORTFOLIO SECURITIES

There  were no  purchases  and sales of  investment  securities,  other than for
short-term investments, for the six months ended June 30, 1999.

                                       10
<PAGE>

   The federal income tax basis of the Trust's  investments at June 30, 1999 was
substantially  the same as the basis for financial  reporting,  and accordingly,
net    unrealized     appreciation    was    $18,774,120    (gross    unrealized
appreciation--$18,807,278, gross unrealized depreciation--$33,158).

NOTE 4. CAPITAL

There are 200 million shares of $.01 par value common stock  authorized.  Of the
10,407,093  common shares  outstanding at June 30, 1999, the Adviser owned 7,093
shares.  As of June 30, 1999, there were 3,120 preferred  shares  outstanding as
follows: Series W28--1,560 and Series W7--1,560.

   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. On May 16, 1995 shareholders approved
a proposal to split each share of the Trust's  Auction  Market  Preferred  Stock
into two shares and simultaneously  reduce each share's  liquidation  preference
from $50,000 to $25,000 plus any  accumulated  but unpaid  dividends.  The stock
split occurred on July 24, 1995.

   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 2.00% to 3.30% during the period ended June 30, 1999.

   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.

NOTE 5.  DIVIDENDS

Subsequent  to June 30, 1999,  the Board of  Directors  of the Trust  declared a
dividend from undistributed  earnings of $0.064375 per common share payable July
30, 1999 to shareholders of record on July 15, 1999.

   For the period July 1,1999 to July 31, 1999,  dividends declared on Preferred
Stock totalled  $172,182 in aggregate for the two  outstanding  Preferred  Stock
series.

                                       11

<PAGE>


- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                           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 reinvested by
State Street Bank and Trust Company (the "Plan Agent") in Trust shares  pursuant
to the Plan.  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 transfer agent, 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 or elsewhere for the participants'  accounts.  The Trust will not
issue any new 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.

   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.

                                       12
<PAGE>

- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                             ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------

   YEAR 2000  READINESS  DISCLOSURE.  The Trust is  currently  in the process of
evaluating its information  technology  infrastructure for Year 2000 compliance.
Substantially  all  of the  Trust's  information  systems  are  supplied  by the
Adviser.  The  Adviser has  advised  the Trust that it is  currently  evaluating
whether such systems are year 2000  compliant and that it expects to incur costs
of up to approximately five hundred thousand dollars to complete such evaluation
and to make any modifications to its systems as may be necessary to achieve Year
2000 compliance.  The Adviser has advised the Trust that it has fully tested its
systems for Year 2000 compliance. The Trust may be required to bear a portion of
such cost  incurred by the Adviser in this  regard.  The Adviser has advised the
Trust that it does not anticipate  any material  disruption in the operations of
the  Trust as a result  of any  failure  by the  Adviser  to  achieve  Year 2000
compliance.  There can be no assurance that the costs will not exceed the amount
referred  to  above or that  the  Trust  will not  experience  a  disruption  in
operations.

   The Adviser has advised the Trust that it is in the process of evaluating the
Year 2000  compliance  of various  suppliers  of the Adviser and the Trust.  The
Adviser has advised the Trust that it has  communicated  with such  suppliers to
determine their Year 2000 compliance  status and the extent to which the Adviser
or the Trust could be affected by any supplier's Year 2000 compliance issues. To
date, the Adviser has received responses from all such suppliers with respect to
their Year 2000  compliance,  and there can be no assurance  that the systems of
such suppliers, who are beyond the Trust's control, will be Year 2000 compliant.
In the event that any of the Trust's  significant  suppliers do not successfully
and timely  achieve Year 2000  compliance,  the Trust's  business or  operations
could be adversely affected. The Adviser has advised the Trust that it is in the
process  of  preparing  a  contingency  plan for  Year  2000  compliance  by its
suppliers.  There  can be no  assurance  that  such  contingency  plan  will  be
successful in preventing a disruption of the Trust's operations.

   The  Trust  is  designating  this  disclosure  as  its  Year  2000  readiness
disclosure  for all  purposes  under the Year  2000  Information  and  Readiness
Disclosure  Act and the  foregoing  information  shall  constitute  a Year  2000
statement for purposes of that Act.

     ANNUAL MEETING OF TRUST  SHAREHOLDERS.  There have been no material changes
in the Trust's investment  objectives or policies that have not been approved by
the  shareholders  or to its charter or by-laws or 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.

   The Annual Meeting of Trust Shareholders was held May 19, 1999 to vote on the
following matters:

    (1) To elect three Directors as follows:

        DIRECTOR                      CLASS           TERM          EXPIRING
        --------                      -----           -----         --------
        Andrew F. Brimmer ........     III           3 years          2002
        Kent Dixon ...............     III           3 years          2002
        Laurence D. Fink .........     III           3 years          2002

        Directors whose term of office continues beyond this meeting are Richard
        E. Cavanagh,  James Grosfeld, Frank J. Fabozzi, James Clayburn La Force,
        Jr., Walter F. Mondale and Ralph L. Schlosstein.

    (2) To ratify the selection of Deloitte & Touche LLP as  independent  public
        accountants of the Trust for the fiscal year ending December 31, 1999.

         Shareholders  elected the three Directors and ratified the selection of
Deloitte & Touche LLP. The results of the voting was as follows:

                                    VOTES FOR      VOTES AGAINST    ABSTENTIONS
                                    ---------      -------------    -----------
        Andrew F. Brimmer ........  8,672,401           --            131,066
        Kent Dixon ...............  8,688,204           --            115,263
        Laurence D. Fink .........  8,688,204           --            115,263
        Ratification of
          Deloitte & Touche LLP ..  8,656,151         72,824           74,492

                                       13

<PAGE>

- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

The  BlackRock   California  Insured  Municipal  2008  Term  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 about December 31, 2008.

WHO MANAGES THE TRUST?

BlackRock  Financial  Management,   Inc.   ("BlackRock")  is  an  SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $141
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international   securities.   Domestic  fixed  income  strategies   utilize  the
government,  mortgage,  corporate and municipal bond sectors.  BlackRock manages
twenty-one  closed-end  funds that are traded on either the New York or American
stock exchanges,  and a $25 billion family of open-end funds.  BlackRock manages
over 470 accounts, domiciled in the United States and overseas.

WHAT CAN THE TRUST INVEST IN?

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 Adviser 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  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 total 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.

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 Trust through the Trust's transfer agent,  State Street
Bank and Trust Company. 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.

                                       14
<PAGE>

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 Trust 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 the issuance of 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.

                                       15
<PAGE>

- --------------------------------------------------------------------------------
         THE BLACKROCK CALIFORNIA INSURED MUNICIPAL 2008 TERM TRUST INC.
                                    GLOSSARY
- --------------------------------------------------------------------------------

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  deduction of
                              expenses.  This Trust  declares and pays dividends
                              on a monthly basis.

DIVIDEND REINVESTMENT:        Shareholders   may  have  all   distributions   of
                              dividends   and   capital   gains    automatically
                              reinvested into additional shares of the Trust.

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  investment,  minus any
                              liabilities  including accrued expenses,  dividend
                              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 on Saturday,  THE
                              NEW YORK  TIMES  and THE WALL  STREET  JOURNAL  on
                              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.

PRE-REFUNDED BONDS:           These  securities are  collateralized  by the U.S.
                              Government securities which are held in escrow and
                              are  used to pay  principal  and  interest  on the
                              tax-exempt issue and to retire the bond in full at
                              the date indicated, typically at a premium to par.

                                       16
<PAGE>

- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                           SUMMARY OF CLOSED-END FUNDS
- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
TAXABLE TRUSTS
- --------------------------------------------------------------------------------
                                                                           STOCK          MATURITY
PERPETUAL TRUSTS                                                           SYMBOL           DATE
                                                                           ------         --------
<S>                                                                          <C>           <C>
The BlackRock Income Trust Inc.                                              BKT            N/A
The BlackRock North American Government Income Trust Inc.                    BNA            N/A
The BlackRock High Yield Trust                                               BHY            N/A

TERM TRUSTS
The BlackRock 1999 Term Trust Inc.                                           BNN           12/99
The BlackRock Target Term Trust Inc.                                         BTT           12/00
The BlackRock 2001 Term Trust Inc.                                           BTM           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


TAX-EXEMPT TRUSTS
- --------------------------------------------------------------------------------
                                                                            STOCK         MATURITY
PERPETUAL TRUSTS                                                           SYMBOL           DATE
                                                                           ------         --------
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>

                                       17
<PAGE>


- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                                   AN OVERVIEW
- --------------------------------------------------------------------------------

   BlackRock  Financial  Management,  Inc.  ("BlackRock")  is an  SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $141
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international securities. BlackRock manages twenty-one closed-end funds that are
traded on either the New York or  American  stock  exchanges,  and a $25 billion
family of open-end funds. BlackRock manages over 470 accounts,  domiciled in the
United States and overseas.

   BlackRock's  fixed income  product was introduced in 1988 by a team of highly
seasoned  fixed  income   professionals.   These   professionals  had  extensive
experience   creating,   analyzing   and  trading  a  variety  of  fixed  income
instruments,  including the most complex structured securities. In fact, several
individuals  at BlackRock  were  responsible  for  developing  many of the major
innovations  in  the  mortgage-backed   and  asset-backed   securities  markets,
including   the  creation  of  the  first  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 emphasis
it places on the development of proprietary  analytical  capabilities.  Over one
quarter of the firm's professionals is dedicated to the design,  maintenance and
use  of  these  systems,   which  are  not  otherwise  available  to  investors.
BlackRock's proprietary analytical tools are used for evaluating,  and designing
fixed income investment  strategies for client portfolios.  Securities purchased
include  mortgages,  corporate  bonds,  municipal bonds and a variety of hedging
instruments.

   BlackRock has developed  investment products that respond to investors' needs
and has been responsible for several major  innovations in closed-end  funds. In
fact, 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 AAA rating by Standard & Poor's, and the first closed-end fund
to  invest  primarily  in  North  American  Government  securities.   Currently,
BlackRock's  closed-end  funds  have  dividend  reinvestment  plans,  which  are
designed  to  provide  ongoing  demand  for the stock in the  secondary  market.
BlackRock  manages a wide range of  investment  vehicles,  each 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
that you may have about your BlackRock  funds and we thank you for the continued
trust that you place in our abilities.




                      If you would like further information
           please do not hesitate to call BlackRock at (800) 227-7BFM

                                       18
<PAGE>

BlackRock

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

OFFICERS
Ralph L. Schlosstein, PRESIDENT
Keith T. Anderson, VICE PRESIDENT
Michael C. Huebsch, VICE PRESIDENT
Robert S. Kapito, VICE PRESIDENT
Kevin Klingert, VICE PRESIDENT
Richard M. Shea, VICE PRESIDENT/TAX
Henry Gabbay, TREASURER
James Kong, ASSISTANT TREASURER
Karen H. Sabath, SECRETARY

INVESTMENT ADVISER
BlackRock Financial Management, Inc.
345 Park Avenue
New York, NY 10154
(800) 227-7BFM

ADMINISTRATOR
Princeton Administrators, L.P.
P.O.Box 9095
Princeton, NJ 08543-9095
(800) 543-6217

CUSTODIAN AND TRANSFER AGENT
State Street Bank and Trust Company
One Heritage Drive
North Quincy, MA 02171
(800) 669-1BFM

AUCTION AGENT
Deutsche Bank
4 Albany Street
New York, NY 10006

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

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
919 Third Avenue
New York, NY 10022

   The  accompanying  financial  statements as of June 30, 1999 were not audited
and accordingly, no opinion is expressed on them. 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.
                                  P.O.Box 9095
                            Princeton, NJ 08543-9095
                                 (800) 543-6217

                                                                     09247G 10 8
                                                                     09247G 20 7
                                                                     09247G 30 8


THE BLACKROCK
CALIFORNIA INSURED MUNICIPAL 2008
TERM TRUST INC.
================================================================================
SEMI-ANNUAL REPORT
JUNE 30, 1999




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