--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISOR
--------------------------------------------------------------------------------

                                                                    May 31, 2001

Dear Shareholder:

      The  semi-annual  period was marked by the  Federal  Reserve's  aggressive
response to the dramatic U.S. led global economic  slowdown.  Economic  weakness
intensified as Gross Domestic Product ("GDP") growth slowed to a pace of 2% from
3% over the six-month  period.  The U.S. slowdown was primarily driven by a near
collapse in corporate  spending and expansion as profits declined,  as well as a
significant  reduction of  inventories.  In the first quarter of 2001,  the U.S.
Treasury  yield curve  steepening of 100 basis points between 2-year and 30-year
Treasuries dominated performance in the fixed income market as the Fed eased the
discount  rate 150 basis points over the quarter and then an additional 50 basis
points in April 2001 to 4.50%.

      Despite the  aggressive  Fed easing of interest rates due to concerns that
economic  activity  may  continue to be  "unacceptably  weak," all high  quality
spread sectors outperformed Treasuries over the period.

      Since March 2000, there has been an equity market decline of approximately
20%. With no immediate stimulus, this decline will place significant reliance on
monetary policy.  Looking  forward,  we believe the revival of profit growth and
continued  robust spending rates by consumers in the face of a negative  savings
rate  may  require  a Fed  funds  rate of 3.5% to  4.0%.  A Fed  that  can  move
aggressively  as inflationary  expectations  move down should continue to foster
increased  risk  tolerances  in the market.  While the direct  beneficiaries  of
declining  inflation  and Treasury  surpluses  should be short and  intermediate
Treasuries,  the longer-term  beneficiary should be the long-end of the Treasury
market,  particularly  15-year to 20-year Treasuries.  We believe investors will
more readily embrace high quality spread assets as substitutes for  intermediate
Treasuries  in the future.  We also believe that the GDP growth rate will remain
far below the 5.0% of 2000, as consumers spend less and save more.

      This semi-annual report contains a summary of market conditions during the
semi-annual  period and a review of portfolio  strategy by your Trust's managers
in addition to the Trust's unaudited financial statements and a detailed list of
the portfolio's holdings.  Continued thanks for your confidence in BlackRock. We
appreciate the opportunity to help you achieve your long-term investment goals.

Sincerely,


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

                                        2


                                                                    May 31, 2001

Dear Shareholder:

     We are  pleased  to  present  the  unaudited  semi-annual  report  for  The
BlackRock  California  Investment Quality Municipal Trust Inc. ("the Trust") for
the six months ended April 30, 2001. We would like to take this  opportunity  to
review the Trust's stock price and net asset value (NAV) performance,  summarize
market developments and discuss recent portfolio management activity.

     The Trust is a non-diversified, actively managed closed-end bond fund whose
shares are traded on the American  Stock  Exchange  under the symbol "RAA".  The
Trust's  investment  objective is to provide high current  income that is exempt
from  regular   federal  and  California   income  taxes   consistent  with  the
preservation of capital.  The Trust seeks to achieve this objective by investing
in  investment  grade  (rated  "AAA"  to "BBB" by a major  rating  agency  or of
equivalent  quality)  municipal debt securities  issued by local  municipalities
throughout California.

     The table below  summarizes  the changes in the Trust's stock price and NAV
over the past six months:

                          ------------------------------------------------------
                              4/30/01    10/31/00   CHANGE     HIGH        LOW
--------------------------------------------------------------------------------
  STOCK PRICE                 $15.10      $14.00     7.86%    $15.35     $13.25
--------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)       $14.77      $14.62     1.03%    $15.11     $14.59
--------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

     Investor hopes for a soft landing quickly turned to fears of a recession as
the U.S. economy rapidly  deteriorated  over the first part of the period.  This
economic weakness intensified in the beginning of 2001 as GDP growth slowed over
the six-month  period to 2% from 3%.  Increasing  pressure on corporate  profits
restrained  investment  spending,  subsequently  reducing the demand for capital
goods and output.  Despite eroding consumer confidence,  slower economic growth,
mounting  layoffs,  and the  reduction  of over $5  trillion  of wealth from the
decline of the equity  markets  from their early year 2000 highs,  the  consumer
remains  relatively  resilient.  According  to the minutes of the April 18, 2001
Federal Open Market  Committee  meeting,  "Capital  investment  has continued to
soften and the  persistent  erosion in current and  expected  profitability,  in
combination with rising uncertainty about the business outlook,  seems poised to
dampen capital spending going forward.  This potential restraint,  together with
the possible  effects of earlier  reductions in equity wealth on consumption and
the risk of  slower  growth  abroad,  threatens  to keep  the  pace of  economic
activity  unacceptably weak." Over the period, the Federal Reserve  aggressively
lowered the discount rate by a total of 2.00% to bring the current discount rate
to 4.50%. Additionally, at the May meeting, the Fed cut rates by 50 basis points
for the fifth time this year.

     U.S.  Treasury  yields began to regain their  characteristic  slopes in the
beginning of the period  after nearly a year of inversion  caused by $30 billion
of Treasury  buybacks  and  multiple  Federal  Reserve  tightenings.  The 2-year
Treasury  note rallied in response to a slumping  economy and a volatile  equity
market. The markets have been further supported by Fed actions,  which cut rates
by 50 basis points on four occasions over the period. The yield curve at the end
of the period  reflected  expectations  of another 100 basis points of easing by
September.  As of April 30, 2001, the 10-year Treasury was yielding 5.34% versus
5.75% on October 31, 2000.

     On a tax-adjusted basis,  municipal bonds outperformed the taxable domestic
bond market for the  semi-annual  period ending April 30, 2001,  returning 7.27%
(as measured by the LEHMAN MUNICIPAL INDEX at a tax bracket of 39.6%) versus the
LEHMAN AGGREGATE INDEX'S 6.22%. Throughout this period,  municipals performed in
line with spread  products and  Treasuries.  Municipals  benefited from retail's
continued   efforts  to  diversify   out  of  equities  and  into  fixed  income
investments.  In a dramatic  reversal from most of 2000, the semi-annual  period
finally saw municipal mutual fund portfolios experience positive cash flows. The
retail  market took a renewed  interest in  municipals  driven  primarily by the
turmoil  experienced  in  equities,  while  institutional  demand for  municipal
securities  increased as investors  looked for  attractive  after tax yields vs.
Treasuries  without the inherent credit risk associated with corporate bonds. As
a result of falling  interest  rates  during the second half of the period,  new
issue supply rose substantially above last year's pace.

     California's  dynamic economic  expansion  continued  through 2000 and into
2001. This growth will be challenged now by rising energy costs, the fall in the
NASDAQ and weakening demand in the computer service  industries.  In April 2001,
the unem

                                        2


ployment  rate was 4.8%,  lower than the 5.0% of a year ago but slightly up from
February's  4.5%  level.  The State is  beginning  to see a decline in growth as
evidenced by fewer new jobs being created although employment still continues to
grow.

     The  State  of  California's   year-to-date  revenues  are  slightly  above
projected  levels.  However,  in March 2001 personal  income tax,  sales tax and
corporate  tax receipts were slightly  below  budget,  additional  evidence of a
slowing economy. Furthermore, since January the State has been using its General
Fund surplus to purchase energy for the States' three crippled  utilities and to
date it has expended over $6 billion. In response to the energy crisis,  Moody's
Investors Services and Standard & Poor's have lowered California's credit rating
to Aa3/A+ from  Aa2/AA and the credit  outlook  remains  negative on the State's
general  obligation  bonds. We are monitoring our California  State holdings and
watching the energy impact on the economy and local issuers.

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 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 period, the Trust's leverage amount was 34% of total assets.

     Municipals outperformed most spread products on a tax-adjusted basis during
the period, except on the short-end of the yield curve. The curve steepened over
the period and the 20-year to 25-year part of the curve  remains very steep on a
historical basis. We remain overweight in premium coupon securities in an effort
to avoid market discount problems.  Premium coupon securities offer better price
performance during periods of falling interest rates, and similar performance to
discounts  when interest  rates rise.  Retail demand  improved at the end of the
period, primarily for bonds 15-years or longer.

     The following charts compare the Trust's current and October 31, 2000 asset
composition and credit quality allocations:

                                SECTOR BREAKDOWN
--------------------------------------------------------------------------------
  SECTOR                                APRIL 30, 2001       OCTOBER 31, 2000
--------------------------------------------------------------------------------
  Transportation                              22%                  22%
--------------------------------------------------------------------------------
  Lease                                       17%                  17%
--------------------------------------------------------------------------------
  University                                  15%                  15%
--------------------------------------------------------------------------------
  District                                    10%                  10%
--------------------------------------------------------------------------------
  Power                                        9%                   9%
--------------------------------------------------------------------------------
  Housing                                      8%                   8%
--------------------------------------------------------------------------------
  City, County & State                         5%                   5%
--------------------------------------------------------------------------------
  Student Loans                                5%                   5%
--------------------------------------------------------------------------------
  Water & Sewer                                5%                   5%
--------------------------------------------------------------------------------
  Industrial                                   2%                   2%
--------------------------------------------------------------------------------
  School                                       2%                   2%
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
  CREDIT RATING*                        APRIL 30, 2001       OCTOBER 31, 2000
--------------------------------------------------------------------------------
  AAA/Aaa                                     67%                  66%
--------------------------------------------------------------------------------
  AA/Aa                                       28%                  29%
--------------------------------------------------------------------------------
  BBB/Baa                                      5%                   5%
--------------------------------------------------------------------------------

----------
* Using the higher of Standard & Poor's, Moody's or Fitch's rating.

                                        3


     We look  forward to  continuing  to manage  the Trust to  benefit  from the
opportunities  available to investors in the investment grade municipal  market.
We  thank  you for your  investment  and  continued  interest  in The  BlackRock
California  Investment Quality Municipal 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,


/s/ Robert S. Kapito                     /s/ Kevin M. Klingert
-----------------------------------      ---------------------------------------
Robert S. Kapito                         Kevin M. Klingert
Vice Chairman and Portfolio Manager      Managing Director and Portfolio Manager



--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
--------------------------------------------------------------------------------
  Symbol on American Stock Exchange:                              RAA
--------------------------------------------------------------------------------
  Initial Offering Date:                                     May 28, 1993
--------------------------------------------------------------------------------
  Closing Stock Price as of 4/30/01:                             $15.10
--------------------------------------------------------------------------------
  Net Asset Value as of 4/30/01:                                 $14.77
--------------------------------------------------------------------------------
  Yield on Closing Stock Price as of 4/30/01 ($15.10)(1):          5.22%
--------------------------------------------------------------------------------
  Current Monthly Distribution per Share(2):                     $ 0.065625
--------------------------------------------------------------------------------
  Current Annualized Distribution per Share(2):                  $ 0.7875
--------------------------------------------------------------------------------
(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.


                         PRIVACY PRINCIPLES OF THE TRUST

     The Trust is committed to maintaining  the privacy of  shareholders  and to
safeguarding its non-public personal  information.  The following information is
provided to help you understand  what personal  information  the Trust collects,
how we  protect  that  information  and why,  in  certain  cases,  we may  share
information with select other parties.

     Generally,  the Trust does not receive any non-public personal  information
relating to its shareholders, although certain nonpublic personal information of
its  shareholders may become available to the Trust. The Trust does not disclose
any  non-public   personal   information   about  its   shareholders  or  former
shareholders  to anyone,  except as permitted by law or as is necessary in order
to service shareholder accounts (for example, to a transfer agent or third party
administrator).

     The Trust restricts  access to non-public  personal  information  about the
shareholders  to BlackRock  employees  with a legitimate  business  need for the
information. The Trust maintains physical,  electronic and procedural safeguards
designed to protect the non-public personal information of its shareholders.

                                        4


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 2001 (UNAUDITED)
--------------------------------------------------------------------------------


        PRINCIPAL
         AMOUNT                                                                           OPTION CALL       VALUE
RATING*   (000)                                     DESCRIPTION                           PROVISIONS+     (NOTE 1)
----------------------------------------------------------------------------------------------------------------------
                                                                                            
                     LONG-TERM INVESTMENTS--147.8%
                     California Educational Fac. Auth. Rev., MBIA,
AAA     $  760++      Santa Clara Univ., 5.00%, 9/01/06 ..............................       N/A        $  812,964
AAA        240        Santa Clara Univ., 5.00%, 9/01/15 ..............................   9/06 at 102       240,120
AAA      1,000        Student Loan Prog., Ser. A, 6.00%, 3/01/16 .....................   3/07 at 102     1,037,890
                     California St. G.O.,
Aa3        960++      5.75%, 3/01/05 .................................................       N/A         1,036,857
Aa3         40        5.75%, 3/01/19 .................................................   3/05 at 101        41,645
                     California St. Hsg. Fin. Agcy. Rev., Home Mtge.,
Aa2        650        Ser. B-1, 6.45%, 2/01/11 .......................................   8/04 at 102       683,313
Aa2      1,000        Ser. G, 7.20%, 8/01/14 .........................................   8/04 at 102     1,057,350
                     California St. Pub. Wks Brd. Lease Rev.,
AAA      1,000++      Dept. of Corrections, Ser. A, 6.875%, 11/01/04 .................       N/A         1,124,640
A1       1,000        St. Univ. Proj., Ser. A, 6.10%, 10/01/06 .......................  10/04 at 102     1,075,120
AAA      1,000++      St. Univ. Proj., Ser. A, 6.40%, 12/01/02, AMBAC ................       N/A         1,067,360
AAA      1,385       Foothill / Eastern Trans. Agcy., Ser. A, Zero Coupon, 1/01/04 ...  No Opt. Call     1,248,411
                     Los Angeles Cnty.,
AAA      1,000++      Met. Trans. Auth. Sales Tax Rev., 6.00%, 7/01/06, MBIA .........       N/A         1,106,440
AAA      1,000        Special Tax, Ser. A, 5.50%, 9/01/14, FSA .......................   9/07 at 102     1,044,870
A3       1,150       Los Angeles Harbor Dept. Rev., Ser. B, 6.00%, 8/01/13 ...........   8/06 at 101     1,239,045
A3       1,000++     Los Angeles Pub. Wks. Fin. Auth. Rev., Regl. Park & Open Space,
                      Dist. A, 6.00%, 10/01/04 .......................................       N/A         1,094,400
BBB-     1,000       Sacramento Pwr. Auth., Cogeneration Proj. Rev., 6.50%, 7/01/09 ..   7/06 at 102     1,091,230
AAA        500       San Diego Ind. Dev. Rev., Ser. A, 5.90%, 6/01/18, AMBAC .........   6/03 at 102       507,840
                     San Francisco City & Cnty.,
AAA        150        Arpt. Comn. Rev., Intl. Arpt., Ser. 12-A, 5.90%, 5/01/26, MBIA .   5/06 at 101       156,810
AAA      1,000        Arpt. Comn. Rev., Intl. Arpt., Ser. 6, 6.125%, 5/01/09, AMBAC ..   5/04 at 102     1,066,040
AAA      1,000        Sewer Rev., Ser. A, 5.95%, 10/01/25, FGIC ......................  10/03 at 102     1,036,290
AAA      1,000       Southern California Pub. Pwr. Auth. Transmission Proj. Rev.,
                      5.50%, 7/01/20, MBIA ...........................................   7/02 at 100     1,013,050
AAA        500       Temecula Valley Univ. Schl. Dist., Ser. G, 5.75%, 8/01/25, FGIC .   8/07 at 102       528,220
                     Univ. of California Rev.,
AAA      1,135++      Ser. B, 6.30%, 9/01/03 .........................................       N/A         1,230,862
AAA      1,000++      Ser. D, 6.10%, 9/01/02, MBIA ...................................       N/A         1,056,120
AAA        370       West Basin Municipal Water Dist. Rev., C.O.P., Ser. A,
                      5.50%, 8/01/22, AMBAC ..........................................   8/07 at 101       379,365
                                                                                                        ----------



                       See Notes to Financial Statements.

                                        5




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

                                                                                                           VALUE
                                                    DESCRIPTION                                           (NOTE 1)
----------------------------------------------------------------------------------------------------------------------
                                                                                                     
                     TOTAL INVESTMENTS--147.8% (COST $20,262,123) ....................                  $21,976,252
                     Other assets in excess of liabilities--2.6% .....................                      395,767
                     Liquidation value of preferred stock--(50.4)% ...................                   (7,500,000)
                                                                                                        -----------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100% ..............                  $14,872,019
                                                                                                        ===========


----------
 *  Using the higher of Standard & Poor's, Moody's or Fitch's rating
 +  Option  call  provisions:  date  (month/year)  and  prices  of the  earliest
    optional call on redemption.  There may be other call  provisions at varying
    prices at later dates.
++  This bond is prerefunded. See Glossary for definitions.

--------------------------------------------------------------------------------
                              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
     MBIA  --   Municipal Bond Insurance Association
--------------------------------------------------------------------------------


                       See Notes to Financial Statements.

                                        6


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 2001 (UNAUDITED)
--------------------------------------------------------------------------------

ASSETS

Investments, at value (cost $20,262,123) (Note 1) ...............   $21,976,252
Cash ............................................................       205,761
Interest receivable .............................................       300,599
Other assets ....................................................         3,241
                                                                    -----------
                                                                     22,485,853
                                                                    -----------
LIABILITIES
Dividends payable--common stock .................................        66,091
Dividends payable--preferred stock ..............................         3,902
Advisory fee payable (Note 2) ...................................         6,489
Administration fee payable (Note 2) .............................         1,854
Other accrued expenses ..........................................        35,498
                                                                    -----------
                                                                        113,834
                                                                    -----------
NET INVESTMENT ASSETS ...........................................   $22,372,019
                                                                    ===========
Net investment assets were comprised of:
  Common Stock:
    Par value (Note 4) ..........................................   $    10,071
    Paid-in capital in excess of par ............................    13,897,103
  Preferred stock (Note 4) ......................................     7,500,000
                                                                    -----------
                                                                     21,407,174
  Undistributed net investment income ...........................        27,021
  Accumulated net realized loss .................................      (776,305)
  Net unrealized appreciation ...................................     1,714,129
                                                                    -----------
Net investment assets, April 30, 2001 ...........................   $22,372,019
                                                                    ===========
Net assets applicable to common shareholders ....................   $14,872,019
                                                                    ===========
Net asset value per share:
  ($14,872,019 / 1,007,093 shares of
  common stock issued and outstanding) ..........................        $14.77
                                                                         ======

--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 2001 (UNAUDITED)
--------------------------------------------------------------------------------

NET INVESTMENT INCOME
Income
  Interest and discount earned ..................................     $ 631,757
                                                                      ---------
Expenses
  Investment advisory ...........................................        39,117
  Administration ................................................        11,176
  Auction agent .................................................         9,000
  Transfer agent ................................................         6,000
  Directors .....................................................         6,000
  Reports to shareholders .......................................         5,000
  Legal .........................................................         3,000
  Independent accountants .......................................         3,000
  Custodian .....................................................         2,000
  Miscellaneous .................................................        13,348
                                                                      ---------
  Total expenses ................................................        97,641
                                                                      ---------
Net investment income ...........................................       534,116
                                                                      ---------
UNREALIZED GAIN ON INVESTMENTS
Net change in unrealized appreciation on
  investments ...................................................       131,710
                                                                      ---------
NET INCREASE IN NET INVESTMENT ASSETS
RESULTING FROM OPERATIONS .......................................     $ 665,826
                                                                      =========

                       See Notes to Financial Statements.

                                        7


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
STATEMENTS OF CHANGES IN NET INVESTMENT ASSETS (UNAUDITED)
--------------------------------------------------------------------------------


                                                                       SIX MONTHS ENDED    YEAR ENDED
                                                                           APRIL  30,      OCTOBER 31,
                                                                              2001            2000
                                                                         -------------    ------------
                                                                                    
INCREASE (DECREASE) IN INVESTMENT ASSETS

OPERATIONS:
  Net investment income ............................................... $   534,116       $ 1,062,983
  Net change in unrealized appreciation on investments ................     131,710           298,860
                                                                        -----------       -----------
  Net increase in net investment assets resulting from operations .....     665,826         1,361,843

DIVIDENDS:
  To common shareholders from net investment income ...................    (396,483)         (823,217)
  To preferred shareholders from net investment income ................    (122,289)         (252,518)
                                                                        -----------       -----------
  Total dividends .....................................................    (518,772)       (1,075,735)
                                                                        -----------       -----------
    Total increase ....................................................     147,054           286,108

NET INVESTMENT ASSETS
Beginning of period ...................................................  22,224,965        21,938,857
                                                                        -----------       -----------
End of period (including undistributed net investment income
  of $27,021 and $11,677, respectively) ............................... $22,372,019       $22,224,965
                                                                        ===========       ===========


                       See Notes to Financial Statements.

                                        8


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
--------------------------------------------------------------------------------


                                                                                        YEAR ENDED OCTOBER 31,
                                                       SIX MONTHS ENDED  -----------------------------------------------------
                                                        APRIL 30, 2001     2000       1999        1998       1997        1996
                                                       ----------------  -------    -------     -------    -------     -------
                                                                                                     
PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ....................    $ 14.62     $ 14.34    $ 15.49     $ 14.77    $ 14.20     $ 13.85
                                                             -------     -------    -------     -------    -------     -------
  Net investment income .................................        .53        1.06       1.05        1.05       1.07        1.08
  Net realized and unrealized gain (loss)
  on investments ........................................        .13         .29      (1.10)        .79        .61         .33
                                                             -------     -------    -------     -------    -------     -------
Net increase (decrease) from investment operations ......        .66        1.35      (0.05)       1.84       1.68        1.41
                                                             -------     -------    -------     -------    -------     -------
Dividends and Distributions:
  Dividends from net investment income to:
    Common shareholders .................................       (.39)      (.82)       (.88)       (.88)      (.87)       (.80)
    Preferred shareholders ..............................       (.12)      (.25)       (.22)       (.24)      (.24)       (.25)
  Distributions in excess of net realized gains
    on investments to:
    Common shareholders .................................         --         --          --          --         **        (.01)
    Preferred shareholders ..............................         --         --          --          --         **          **
                                                             -------     -------    -------     -------    -------     -------
Total dividends and distributions .......................       (.51)     (1.07)      (1.10)       (1.12)    (1.11)      (1.06)
                                                             -------     -------    -------     -------    -------     -------
Net asset value, end of period* .........................    $ 14.77    $ 14.62     $ 14.34      $ 15.49   $ 14.77     $ 14.20
                                                             =======    =======     =======      =======   =======     =======
Market value, end of period* ............................    $ 15.10    $ 14.00     $ 15.50      $16.125   $ 15.00     $ 13.50
                                                             =======    =======     =======      =======   =======     =======
TOTAL INVESTMENT RETURN+: ...............................      10.77%     (4.33)%      1.52%      13.70%     17.98%      13.80%
                                                             =======    =======     =======      =======   =======     =======
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS++:
Expenses ................................................       1.31%+++   1.41%       1.34%       1.36%      1.32%       1.42%
Net investment income before
  preferred stock dividends .............................       7.19%+++   7.36%       6.95%       6.93%      7.48%       7.78%
Preferred stock dividends ...............................       1.65%+++   1.75%       1.47%       1.60%      1.70%       1.82%
Net investment income available to
  common shareholders ...................................       5.54%+++   5.61%       5.48%       5.33%      5.78%       5.96%

SUPPLEMENTAL DATA:
Average net assets of common
  shareholders (in thousands) ...........................    $14,976    $14,450     $15,170     $15,265    $14,445     $13,996
Portfolio turnover                                                 0%         0%          4%          0%        28%         72%
Net assets of common shareholders, end of period
  (in thousands) ........................................    $14,872    $14,725     $14,439     $15,595    $14,873     $14,296
Asset coverage per share of preferred
  stock, end of period ..................................    $74,586    $74,097     $73,138     $76,990     $74,583     $72,654
Preferred stock outstanding (in thousands) ..............    $ 7,500    $ 7,500     $ 7,500     $ 7,500     $ 7,500     $ 7,500


----------
 *  Net asset value and market  value are  published in BARRON'S on Saturday and
    THE WALL STREET JOURNAL on Monday.
**  Actual   amount  paid  for  the  year  ended  October  31,  1997  to  common
    shareholders  was  $0.00056  per share  and to  preferred  shareholders  was
    $0.00018 per common share. Actual amount paid to preferred  shareholders for
    the year ended October 31, 1996 was $0.0048 per common share.
 +  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.  This
    calculation 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 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, ratio 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 the Trust's common stock.

                       See Notes to Financial Statements.

                                        9


--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
--------------------------------------------------------------------------------

NOTE 1. ORGANIZATION    The BlackRock  California  Investment  Quality Municipal
& ACCOUNTING            Trust Inc.  (the  "Trust") was  organized in Maryland on
POLICIES                April   12,   1993  as  a   non-diversified   closed-end
                        management  investment  company.  The Trust's investment
objective  is to manage a  portfolio  of  investment  quality  securities  while
providing high current income exempt from regular  Federal and California  state
income taxes consistent with the preservation of capital. 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  dealers or  pricing  services  approved  by the  Trust's  Board of
Directors.  In determining the value of a particular security,  pricing services
may use certain  information  with respect to  transactions  in such  securities
quotations from bond dealers,  market transactions in comparable  securities and
various  relationships  between securities.  Short-term securities are valued at
amortized  cost.  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.

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  accretes  original  issue  discount  or  amortizes
premium 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 accounting
principles   generally  accepted  in  the  United  States  of  America  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.

DEFERRED  COMPENSATION PLAN: Under a deferred  compensation plan approved by the
Board of Directors on February 24, 2000,  non-interested  Directors may elect to
defer receipt of all or a portion of their annual compensation.

   Deferred amounts earn a return as though  equivalent  dollar amounts had been
invested in common shares of other  BlackRock  funds  selected by the Directors.
This has the same economic  effect as if the Directors had invested the deferred
amounts in such other BlackRock funds.

   The  deferred  compensation  plan is not  funded and  obligations  thereunder
represent  general unsecured claims against the general assets of the Trust. The
Trust may, however,  elect to invest in common shares of those funds selected by
the Directors in order to match its deferred compensation obligations.

NEW ACCOUNTING POLICIES:  The Trust will adopt the provisions of the AICPA Audit
and Accounting Guide for Investment Companies, as revised,  effective for fiscal
years  beginning  after  December  15, 2000.  As required,  the Trust will begin
amortizing  discounts on debt securities  effective  November 1, 2000.  Prior to
this date,  the Trust  amortized  premiums and original  issue  discount on debt
securities but did not amortize market discount.  The cumulative  effect of this
accounting  change will have no impact on the total net assets of the Trust. The
impact of this accounting  change is anticipated to have an immaterial effect on
the  financial  statements  and will result in an increase to cost of securities
and a corresponding decrease in net unrealized appreciation, based on securities
held as of October 31, 2000.

NOTE 2. AGREEMENTS      The  Trust has an  Investment  Advisory  Agreement  with
                        BlackRock  Advisors,   Inc.,  which  is  a  wholly-owned
                        subsidiary  of  BlackRock,  Inc.,  which  in  turn is an
                        indirect, majority-owned


                                       10


subsidiary of PNC Financial Services Group, Inc. The Trust has an Administration
Agreement with Prudential Investments Fund Management LLC ("PIFM"), an indirect,
wholly-owned  subsidiary of The  Prudential  Insurance  Company of America.

   The  investment  advisory  fee paid to the  Advisor  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 PIFM 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 Advisor provides  continuous  supervision of
the investment  portfolio and pays the compensation of the officers of the Trust
who are  affiliated  persons of the  Advisor.  PIFM pays  occupancy  and certain
clerical and accounting  costs of the Trust. The Trust bears all other costs and
expenses.

NOTE 3. PORTFOLIO       Sales of  investment  securities  other than  short-term
SECURITIES              investments,  for the six months  ended  April 30,  2001
                        aggregated $50,000. There were no purchases for the same
                        period.

   The Federal income tax basis of the Trust's investments at April 30, 2001 was
substantially  the same as the  basis  for  financial  reporting  purposes  and,
accordingly, net and gross unrealized appreciation was $1,714,129.

   For Federal income tax purposes, the Trust had a capital loss carryforward at
October  31,  2000  of  approximately   $773,000  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 amount.

NOTE 4. CAPITAL         There are 200  million  shares of $.01 par value  common
                        stock  authorized.  The Trust may classify or reclassify
any unissued shares of common stock into one or more series of preferred  stock.
Of the 1,007,093 common shares  outstanding at April 30, 2001, the Advisor owned
7,093  shares.  As of April 30,  2001 there were 300 shares of  preferred  Stock
Series W7 outstanding.

   Dividends on Series W7 are  cumulative  at a rate which is reset every 7 days
based on the results of an auction.  Dividend  rates  ranged from 2.50% to 4.19%
during the six months ended April 30, 2001.

   The Trust may not declare  dividends  or make other  distributions  on common
shares  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,  and the  approval  of the holders of a majority of any
outstanding  preferred stock,  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 April 30, 2001,  the Board of Directors of
                        the  Trust   declared  a  dividend  from   undistributed
earnings of $0.065625 per common share payable June 1, 2001 to  shareholders  of
record on May 15, 2001.

   For the period May 1, 2001 to May 31, 2001,  dividends  declared on Preferred
Stock totalled $18,974 in aggregate for the outstanding preferred stock.

                                       11


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                           DIVIDEND REINVESTMENT PLAN
--------------------------------------------------------------------------------

      Pursuant to the Trust's Dividend  Reinvestment  Plan (the "Plan"),  common
shareholders are  automatically  enrolled 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 elect not to
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 American
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 will be made 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 addresses are on the front of this report.


                                       12



--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                             ADDITIONAL INFORMATION
--------------------------------------------------------------------------------

      Quarterly  performance  and other  information  regarding the Trust may be
found    on    BlackRock's     website,     which    can    be    accessed    at
http://www.blackrock.com/funds/cefunds.html.   This   reference  to  BlackRock's
website is intended to allow  investors  public access to quarterly  information
regarding the Trust and is not intended to incorporate  BlackRock's website into
this report.

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  Shareholders  was held May 24, 2001 to vote on the
following matter:

      To elect two Directors as follows:

          DIRECTOR                         CLASS        TERM       EXPIRING
          --------                         -----        ----       --------
          Richard E. Cavanagh ...........    I         3 years       2004
          James Clayburn La Force, Jr. ..    I         3 years       2004

          Directors  whose term of office  continues  beyond  this  meeting  are
          Andrew F. Brimmer,  Kent Dixon,  Frank J.  Fabozzi,  Laurence D. Fink,
          Walter F. Mondale and Ralph L. Schlosstein.

      Shareholders elected the two Directors.  The results of the voting were as
follows:

                                        VOTES FOR    VOTES AGAINST   ABSTENTIONS
                                        ---------    -------------   -----------
      Richard E. Cavanagh ...........       300             --             --
      James Clayburn La Force, Jr....   663,785             --           17,038


                                       13


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                               INVESTMENT SUMMARY
--------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

The  BlackRock  California   Investment  Quality  Municipal  Trust's  investment
objective  is to provide  high current  income  exempt from regular  Federal and
California income tax consistent with the preservation of capital.

WHO MANAGES THE TRUST?

BlackRock  Advisors,  Inc. (the "Advisor")  manages the Trust.  The Advisor is a
wholly-owned subsidiary of BlackRock,  Inc.  ("BlackRock"),  which is one of the
largest  publicly traded  investment  management firms in the United States with
$202 billion of assets under management as of March 31, 2001.  BlackRock manages
assets on  behalf  of more  than  3,300  institutions  and  200,000  individuals
worldwide, including nine of the ten largest companies in the U.S. as determined
by Fortune Magazine,  through a variety of equity,  fixed income,  liquidity and
alternative  investment  separate  accounts  and  mutual  funds,  including  the
BLACKROCK  FUNDS and  BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS.  In  addition,
BlackRock  provides risk management and technology  services to a growing number
of  institutional  investors  under the BLACKROCK  SOLUTIONS  name.  Clients are
served from  BlackRock's  headquarters  in New York City,  as well as offices in
Wilmington, DE, Edinburgh, Scotland, Tokyo, Japan, and Hong Kong. BlackRock is a
member of The PNC Financial  Services Group,  Inc.  ("PNC"),  one of the largest
diversified  financial  services  organizations  in the  United  States,  and is
majority-owned by PNC and by BlackRock employees.

WHAT CAN THE TRUST INVEST IN?

Under normal  conditions,  the Trust expects to continue to manage its assets so
that at  least  80% of its  investments  are  rated at  least  investment  grade
("BBB"by Standard & Poor's or "Baa" by Moody's Investor  Services) and up to 20%
of its assets may instead be deemed to be of  equivalent  credit  quality by the
Advisor.  The Trust  intends  to  invest  substantially  all of the  assets in a
portfolio of investment grade California  Municipal  Obligations,  which include
debt  obligations   issued  by  or  on  behalf  of  California,   its  political
subdivisions,  agencies and  instrumentalities  and by other qualifying  issuers
that pay interest  which,  in the opinion of the bond counsel of the issuer,  is
exempt from regular  Federal and  California  income tax.  California  Municipal
Obligations are issued to obtain funds for various public  functions,  including
the   construction  of  public   facilities,   the  refinancing  of  outstanding
obligations, the obtaining of funds for general operating expenses and for loans
to other public institutions and facilities.

WHAT IS THE ADVISOR'S INVESTMENT STRATEGY?

The Advisor will manage the assets of the Trust in  accordance  with the Trust's
investment  objective and policies to seek to achieve its objective by investing
in  investment  grade  California  Municipal  Obligations  or  other  qualifying
issuers.  The  Advisor  actively  manages  the  assets  in  relation  to  market
conditions  and  interest  rate  changes.   Depending  on  yield  and  portfolio
allocation  considerations,  the  Advisor  may choose to invest a portion of the
Trust's   assets  in   securities   which  pay  interest   that  is  subject  to
AMT(alternative  minimum  tax).  The Trust intends to emphasize  investments  in
California  municipal  obligations  with  long-term  maturities  and  expects to
maintain an average portfolio  maturity of 15-20 years, but the average maturity
may be shortened or lengthened from time to time depending on market conditions.

Under current market conditions the use of leverage  increases the income earned
by the Trust.  The Trust  employs  leverage  primarily  through the  issuance of
preferred  stock.   Preferred  stockholders  will  receive  dividends  based  on
short-term rates in exchange for allowing the Trust to borrow additional assets.
These assets will be invested in longer-term assets which typically offer higher
interest  rates and the  difference  between the cost of the  dividends  paid to
preferred  stockholders  and the interest earned on the  longer-term  securities
will provide higher income levels for common  stockholders in most interest rate
environments. See "Leverage Considerations in the Trust" below.

                                       14


HOW ARE THE TRUST'S  SHARES  PURCHASED  AND SOLD?  DOES THE TRUST PAY  DIVIDENDS
REGULARLY?

The  Trust's  common  shares are traded on the  American  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 first business
day of the month. For shares held in the  shareholder's  name,  dividends may be
reinvested in additional  shares of the Trust through its 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.

LEVERAGE CONSIDERATIONS IN THE TRUST

Leverage  increases  the duration (or price  sensitivity  of the net assets with
respect to changes  in  interest  rates) 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  interest  rate
environment.  The Trust may reduce,  or unwind,  the amount of leverage employed
should the Advisor  consider that  reduction to be in the best  interests of the
Trust.  The  Advisor's  portfolio  managers  continuously  monitor and regularly
review the  Trust's  use of  leverage  and  maintain  the  ability to unwind the
leverage if that course is chosen.

SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO THE TRUST

THE TRUST IS  INTENDED  TO BE A  LONG-TERM  INVESTMENT  AND IS NOT A  SHORT-TERM
TRADING VEHICLE.

INVESTMENT  OBJECTIVE.  Although  the  objective of the Trust is to provide high
current income exempt from regular Federal and California  income tax consistent
with the preservation of capital,  there can be no assurance that this objective
will be achieved.

DIVIDEND  CONSIDERATIONS.  The income and dividends paid by the Trust are likely
to vary over time as fixed income market conditions change. Future dividends may
be higher or lower than the dividend the Trust is currently paying.

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 American Stock  Exchange  (AMEX symbol:  RAA) 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.

INVESTMENT GRADE MUNICIPAL  OBLIGATIONS.  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.

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. These securities involve 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.

                                       15


--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL 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 the
                                   deduction  of expenses.  This Trust  declares
                                   and pays dividends to common  shareholders on
                                   a monthly basis.

DIVIDEND REINVESTMENT:             Common  shareholders  may have all  dividends
                                   and    distributions    of   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
                                   investments,  minus any liabilities including
                                   accrued expenses, divided by the total number
                                   of  outstanding  common  shares.  It  is  the
                                   underlying  value of a single common share on
                                   a given day. Net asset value for the Trust is
                                   calculated  weekly and  published in BARRON'S
                                   on Saturday  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.

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.


                                       16


--------------------------------------------------------------------------------
                            BLACKROCK ADVISORS, INC.
                           SUMMARY OF CLOSED-END FUNDS
--------------------------------------------------------------------------------



TAXABLE TRUSTS
-------------------------------------------------------------------------------------------------------------------------
                                                                                        STOCK                MATURITY
                                                                                        SYMBOL                 DATE
                                                                                        ------               --------
                                                                                                         
PERPETUAL TRUSTS
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 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
                                                                                        SYMBOL                 DATE
PERPETUAL TRUSTS                                                                        ------               --------
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
The BlackRock Pennsylvania Strategic Municipal Trust                                      BPS                   N/A
The BlackRock Strategic Municipal Trust                                                   BSD                   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




      IF YOU WOULD LIKE FURTHER INFORMATION PLEASE DO NOT HESITATE TO CALL
   BLACKROCK AT (800) 227-7BFM (7236) OR CONSULT WITH YOUR FINANCIAL ADVISOR.

                                        17


--------------------------------------------------------------------------------
                            BLACKROCK ADVISORS, INC.
                                   AN OVERVIEW
--------------------------------------------------------------------------------

      BlackRock Advisors, Inc. (the "Advisor") manages the Trust. The Advisor is
a wholly-owned subsidiary of BlackRock, Inc. ("BlackRock"),  which is one of the
largest  publicly traded  investment  management firms in the United States with
$202 billion of assets under management as of March 31, 2001.  BlackRock manages
assets on  behalf  of more  than  3,300  institutions  and  200,000  individuals
worldwide, including nine of the ten largest companies in the U.S. as determined
by Fortune Magazine,  through a variety of equity,  fixed income,  liquidity and
alternative  investment  separate  accounts  and  mutual  funds,  including  the
BLACKROCK  FUNDS and  BLACKROCK  PROVIDENT  INSTITUTIONAL  FUNDS.  In  addition,
BlackRock  provides risk management and technology  services to a growing number
of  institutional  investors  under the BLACKROCK  SOLUTIONS  name.  Clients are
served from  BlackRock's  headquarters  in New York City,  as well as offices in
Wilmington, DE, Edinburgh, Scotland, Tokyo, Japan, and Hong Kong. BlackRock is a
member of The PNC Financial  Services Group,  Inc.  ("PNC"),  one of the largest
diversified  financial  services  organizations  in the  United  States,  and is
majority-owned by PNC and by BlackRock employees.

      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

[Logo] BLACKROCK

DIRECTORS
Laurence D. Fink, CHAIRMAN
Andrew F. Brimmer
Richard E. Cavanagh
Kent Dixon
Frank J. Fabozzi
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
Anne Ackerley, SECRETARY

INVESTMENT ADVISOR
BlackRock Advisors, Inc.
100 Bellevue Parkway
Wilmington, DE 19809
(800) 227-7BFM

ADMINISTRATOR
Prudential Investments Fund Management LLC
Gateway Center Three
100 Mulberry Street
Newark, NJ 07102-4077

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

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

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

LEGAL COUNSEL
Skadden, Arps, Slate, Meagher & Flom LLP
Four Times Square
New York, NY 10036

LEGAL COUNSEL -- INDEPENDENT DIRECTORS
Debevoise & Plimpton
875 Third Avenue
New York, NY 10022

   The accompanying  financial  statements as of April 30, 2001 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 INVESTMENT
                          QUALITY MUNICIPAL TRUST INC.
                 c/o Prudential Investments Fund Management LLC
                              Gateway Center Three
                               100 Mulberry Street
                              Newark, NJ 07102-4077
                                 (800) 227-7BFM

[Logo] Printed on recycled paper                                    09247U-10-7
                                                                    09247F-10-7

THE [Logo] BLACKROCK
CALIFORNIA
INVESTMENT QUALITY MUNICIPAL TRUST INC.
--------------------------------------------------------------------------------
SEMI-ANNUAL REPORT
APRIL 30, 2001



[Logo] BLACKROCK