BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 2000-06-29
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--------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                      SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISOR
--------------------------------------------------------------------------------
                                                                    May 31, 2000


Dear Shareholder:

     The  Federal  Reserve  continued  to  aggressively tighten in an attempt to
achieve  its  objective  of  a soft-landing for the explosive U.S. economy. As a
result,  the  Federal  Reserve  tightened  short-term  rates by 0.75% during the
period  and  raised  rates by another 0.50% at the May FOMC meeting to 6.50%. In
the   first  four  months  of  the  new  millennium  we  have  been  witness  to
unprecedented  volatility  in  both  the  Treasury  yield  curve  and the spread
sectors.  The  Treasury  curve inverted sharply as expectations of continued Fed
tightening  in  the  wake of an insatiable U.S. economy, while anticipation of a
significant  buyback  at  the  long  end  of  the maturity spectrum led to lower
yields  on  long  Treasuries.  The  yield curve inversion along with the premium
placed   on   the   dwindling   outstanding   Treasuries   caused   a   dramatic
underperformance  of  spread sectors relative to the performance of the Treasury
sectors, especially in the 10- to 30-year part of the curve.

     At  this  juncture, the general implication for spread product is negative,
but  the  potential  for  spread widening is more limited. Most of the negatives
for  high  quality  spread  product  in  terms  of relative supply differentials
between  Treasuries  and non-Treasuries as well as equity market volatility have
been  priced  into  the  market.  Given current market conditions, we maintain a
significant  overweight  in  high  quality  spread product. Treasuries are fully
valued  even  considering  the  strong technicals in the market. While near-term
volatility  is  virtually  guaranteed by an active Federal Reserve, a successful
soft  landing  of  the  economy  would  ultimately  result  in  a healthier U.S.
economy.

     This  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


                                       1
<PAGE>

                                                                   May 31, 2000


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, 2000. 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:

                        --------------------------------------------------------
                         4/30/00   10/31/99     CHANGE       HIGH       LOW
--------------------------------------------------------------------------------
 STOCK PRICE             $13.75     $15.50     (11.29%)     $15.50     $13.75
--------------------------------------------------------------------------------
 NET ASSET VALUE (NAV)   $14.16     $14.34      (1.26%)     $14.45     $14.00
--------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

     The  dynamic  expansion  of the U.S. economy continues undaunted by Federal
Reserve  Chairman Greenspan's attempt to brake the economy, short of stalling it
into  a  recession.  The  labor markets remain tight, growth remains strong with
5%+  annualized  growth  rates  and inflation pressures continue to be offset by
increased  productivity.  However,  the  Fed remains cautious, in their February
minutes  it was noted that: "Other members acknowledged that the Committee might
need  to move more aggressively at a later meeting should imbalances continue to
build  and  inflation  expectations  clearly  begin  to pick up." At the Federal
Reserve  meeting  in  November,  February  and March the Fed raised the discount
rate  by 0.25% at each meeting and a 0.50% increase was made in May to bring the
current discount rate to 6.50%.

     The  Treasury  Yield curve experienced a complex set of dynamics, which has
inverted  the  curve  and  may  continue to invert the curve for the foreseeable
future.  The  yields  on the short-end of the curve increased sharply during the
period  in response to three Federal Reserves increases to the discount rate and
perceived  future Fed actions in the coming months. The long-end of the curve is
reacting  to  the  "official"  announcement  that the Treasury will buy back $30
billion  of Treasuries with maturities ranging 10 to 30 years. With a decreasing
supply  of  available Treasuries, a balanced budget, and an unchanged demand for
longer  maturity  Treasuries,  we  would  anticipate this condition to continue.
This  condition  is  further  augmented  by  Treasury  auction activity, as they
reduce  the  available  bonds  on the long end of the curve they continue to add
supply  in  the  1-10  year range through periodic auctions. For the semi-annual
period,  the  yield  of the 10-year Treasury security rose from 6.02% on October
31, 1999 to 6.22% on April 30, 2000.

     Municipal  bonds  outperformed  the taxable domestic bond market during the
past  six  months,  returning  2.63% (as measured by the LEHMAN MUNICIPAL INDEX)
versus  the LEHMAN AGGREGATE INDEX'S 1.42% on a pre-tax basis. Overall, the tone
in  the  market  during  the  period  was  extremely  positive  as the result of
continued   strong  demand  from  individual/retail  investors  coupled  with  a
slowdown  in  new  issuance. During 1999, households increased their holdings of
individual  municipal  bonds  by  over  $40  billion  while mutual funds saw net
outflows.  Offsetting  the large amount of mutual fund outflows during the first
quarter  of 2000 was a 43% decline in overall new municipal bond issuance led by
a  90% drop in refunding volume. Refunding volume was down due to the relatively
higher  interest  rates  experienced during the first quarter 2000 when compared
to  the  first  quarter  1999, while new money issuance has declined because the
strong  economy  has  led  to  full  coffers  at most municipalities. Currently,
municipal   bonds  across  the  entire  maturity  spectrum  are  at  their  most
attractive relationships to their Treasury market counterparts.


                                       2
<PAGE>


     California's  dynamic  economic  expansion continues. In the second half of
1999  non-farm payroll grew 4% significantly exceeding the national rate (2.1%).
This  expansion  is  projected  to  continue  at a 3.5% annual rate in 2000. The
State  accounts  for  approximately  40%  of  the  nation's  non-farm employment
growth.  Unemployment  dropped to 4.6% in February 2000, the state's lowest rate
since  February  1959, and only 0.5% above the national level. Trade values from
California's  customs districts continue to expand with both exports and imports
growing at the ports of Los Angeles, San Francisco and San Diego.

     The  State's  year-to-date revenues are $2.5 billion over projections. This
is  primarily  attributed to the increase in personal income tax receipts, which
may  be  a  reflection of employees exercising their stock options. Furthermore,
sales  tax receipts continue to show steady growth with an 8.2% increase in 1999
and  projections  for  a  7.1%  increase in 2000. The State's fiscal 2000 budget
uses  conservative  assumptions,  which  provides some flexibility. The improved
liquidity   position  should  enable  California  to  weather  potential  future
volatility in its economically sensitive 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  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
34% of total assets.

     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  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.

     The  following  charts  compare  the  Trust's  current and October 31, 1999
asset composition and credit quality allocations:

--------------------------------------------------------------------------------
                                SECTOR BREAKDOWN
--------------------------------------------------------------------------------
 SECTOR                                  APRIL 30, 2000        OCTOBER 31, 1999
--------------------------------------------------------------------------------
  Transportation                              22%                    20%
--------------------------------------------------------------------------------
  Lease                                       16%                    17%
--------------------------------------------------------------------------------
  University                                  15%                    15%
--------------------------------------------------------------------------------
  District                                    10%                    10%
--------------------------------------------------------------------------------
  Power                                        9%                     9%
--------------------------------------------------------------------------------
  Housing                                      9%                     9%
--------------------------------------------------------------------------------
  City, County & State                         5%                     5%
--------------------------------------------------------------------------------
  Water & Sewer                                5%                     5%
--------------------------------------------------------------------------------
  Student Loans                                5%                     5%
--------------------------------------------------------------------------------
  Industrial                                   2%                     5%
--------------------------------------------------------------------------------
  School                                       2%                     -
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
   CREDIT RATING*                        APRIL 30, 2000        OCTOBER 31, 1999
--------------------------------------------------------------------------------
      AAA/Aaa                                  71%                    46%
--------------------------------------------------------------------------------
       AA/Aa                                   19%                    24%
--------------------------------------------------------------------------------
        A/A                                     5%                    20%
--------------------------------------------------------------------------------
      BBB/Baa                                   5%                    10%
--------------------------------------------------------------------------------

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

                                       3
<PAGE>


     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
BlackRock Advisors, Inc.              BlackRock Advisors, Inc.


--------------------------------------------------------------------------------
        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 04/30/00:                        $13.75
--------------------------------------------------------------------------------
  Net Asset Value as of 04/30/00:                            $14.16
--------------------------------------------------------------------------------
  Yield on Closing Stock Price as of 04/30/00 ($13.75)(1):     5.73%
--------------------------------------------------------------------------------
  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.

                                       4
<PAGE>

--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 2000 (UNAUDITED)
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
            PRINCIPAL
              AMOUNT                                                                                  OPTION CALL      VALUE
 RATING*      (000)                                    DESCRIPTION                                    PROVISIONS+     (NOTE 1)
========= ============= ========================================================================= ================ =============
<S>       <C>           <C>                                                                       <C>              <C>
                        LONG-TERM INVESTMENTS-150.2%
                        California Educational Fac. Auth. Rev.,
 AAA          $  760++    Santa Clara Univ., 5.00%, 9/01/06, MBIA ...............................       N/A         $   776,903
 AAA             240      Santa Clara Univ., 5.00%, 9/01/15, MBIA ...............................  No Opt. Call         226,886
 AAA           1,000      Student Loan Prog., Ser. A, 6.00%, 3/01/16, MBIA ......................   3/07 at 102       1,002,050
                        California St. G.O.,
 AA              960++    5.75%, 3/01/05 ........................................................       N/A           1,003,497
 AA               40      5.75%, 3/01/19 ........................................................   3/05 at 101          39,969
                        California St. Hsg. Fin. Agcy. Rev., Home Mtge.,
 AA              770      Ser. B-1, 6.45%, 2/01/11 ..............................................   8/04 at 102         792,677
 Aa2           1,000      Ser. G, 7.20%, 8/01/14 ................................................   8/04 at 102       1,047,970
                        California St. Pub. Wks. Brd. Lease Rev.,
 Aaa           1,000++    Dept. of Corrections, Ser. A, 6.875%, 11/01/04 ........................       N/A           1,100,430
 A1            1,000      St. Univ. Proj., Ser. A, 6.10%, 10/01/06 ..............................  10/04 at 102       1,061,120
 AAA           1,000++    St. Univ. Proj., Ser. A, 6.40%, 12/01/02, AMBAC .......................       N/A           1,060,520
 AAA           1,385    Foothill / Eastern Trans. Agcy., Ser. A, Zero Coupon, 1/01/04 ...........  No Opt. Call       1,155,921
                        Los Angeles Cnty.,
 AAA           1,000++    Met. Trans. Auth., Sales Tax Rev., 6.00%, 7/01/26, MBIA ...............       N/A           1,067,430
 AAA           1,000      Special Tax, Ser. A, 5.50%, 9/01/14, FSA ..............................   9/07 at 102       1,006,650
 AA            1,150    Los Angeles Harbor Dept. Rev., Ser. B, 6.00%, 8/01/13 ...................   8/06 at 101       1,193,482
 AAA           1,000++  Los Angeles Pub. Wks. Fin. Auth. Rev., Regl. Park & Open Space,
                          Dist. A, 6.00%, 10/01/04 ..............................................       N/A           1,064,610
 BBB-          1,000    Sacramento Pwr. Auth., Cogeneration Proj. Rev., 6.50%, 7/01/09 ..........   7/06 at 102       1,040,350
 AAA             500    San Diego Ind. Dev. Rev., Ser. A, 5.90%, 6/01/18, AMBAC .................   6/03 at 102         503,920
                        San Francisco City & Cnty.,
 AAA             150      Arpt. Comn. Rev., Intl. Arpt., Ser. 12-A, 5.90%, 5/01/26 ..............   5/06 at 101         147,075
 AAA           1,000      Arpt. Comn. Rev., Intl. Arpt., Ser. 6, 6.125%, 5/01/09, AMBAC .........   5/04 at 102       1,052,170
 AAA           1,000      Sewer Rev., Ser. A, 5.95%, 10/01/25, FGIC .............................  10/03 at 102       1,003,730
 AAA           1,000    Southern California Pub. Pwr. Auth. Transmission Proj. Rev.,
                          5.50%, 7/01/20, MBIA ..................................................   7/02 at 100         966,730
 AAA             500    Temecula Valley Uni. Schl. Dist., Ser. G, 5.75%, 9/01/25, FGIC ..........   8/07 at 102         493,420
                        Univ. of California Rev.,
 AAA           1,135++    Ser. B, 6.30%, 9/01/03 ................................................       N/A           1,209,342
 AAA           1,000++    Ser. D, 6.10%, 9/01/02, MBIA ..........................................       N/A           1,050,220
 AAA             370    West Basin Municipal Water Dist. Rev., C.O.P., Ser. A, 5.50%,
                          8/01/22, AMBAC ........................................................   8/07 at 101         355,281
                                                                                                                    -----------
                        TOTAL LONG-TERM INVESTMENTS (COST $20,302,193)...........................                    21,422,353
                                                                                                                    -----------
</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>
                     SHORT-TERM INVESTMENT**-0.7%
 A-1+     $100       Irvine California Impvt., 5.90%, 5/01/00, FRDD (cost $100,000)..........        N/A        $    100,000
                                                                                                                ------------
                     TOTAL INVESTMENTS-150.9% (COST $20,402,193).............................                     21,522,353
                     Other assets in excess of liabilities-1.7% .............................                        241,649
                     Liquidation value of preferred stock-(52.6%) ...........................                     (7,500,000)
                                                                                                                ------------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS-100% ......................                   $ 14,264,002
                                                                                                                ============
</TABLE>

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

**  For  purposes  of  amortized  cost  valuation,  the  maturity  date  of this
    instrument  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 on redemption.  There may be other call  provisions at varying
    prices at later dates.

++  This bond is prerefunded. See Glossary for definitions.

--------------------------------------------------------------------------------
         THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:
              AMBAC -  American Municipal Bond Assurance Corporation
             C.O.P. -  Certificate of Participation
               FGIC -  Financial Guaranty Insurance Company
               FRDD -  Floating Rate Daily Demand
                FSA -  Financial Security Assurance
               G.O. -  General Obligation
               MBIA -  Municipal Bond Insurance Association
--------------------------------------------------------------------------------

                       See Notes to Financial Statements.

                                       6
<PAGE>

--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 2000 (UNAUDITED)
--------------------------------------------------------------------------------

ASSETS
Investments, at value (cost $20,402,193) (Note 1) .............    $21,522,353
Cash ..........................................................         41,922
Interest receivable ...........................................        308,850
                                                                   -----------
                                                                    21,873,125
                                                                   -----------
LIABILITIES
Dividends payable-common stock ................................         66,090
Advisory fee payable (Note 2) .................................          5,606
Dividends payable-preferred stock .............................          3,124
Administration fee payable (Note 2) ...........................          1,808
Other accrued expenses ........................................         32,495
                                                                   -----------
                                                                       109,123
                                                                   -----------
NET INVESTMENT ASSETS .........................................    $21,764,002
                                                                   ===========
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 ..........................         12,973
 Accumulated net realized loss ................................       (776,305)
 Net unrealized appreciation ..................................      1,120,160
                                                                   -----------
Net investment assets, April 30, 2000 .........................    $21,764,002
                                                                   ===========
Net assets applicable to common shareholders ..................    $14,264,002
                                                                   ===========
Net asset value per share:
  ($14,264,002 \d 1,007,093 shares of common
  stock issued and outstanding) ...............................         $14.16
                                                                        ======

--------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 2000 (UNAUDITED)
--------------------------------------------------------------------------------

NET INVESTMENT INCOME
Income
   Interest and discount earned ...............................    $   633,018
                                                                   -----------

Expenses
   Investment advisory ........................................         37,504
   Administration .............................................         10,922
   Reports to shareholders ....................................         10,000
   Auction agent ..............................................          9,000
   Transfer agent .............................................          7,500
   Directors ..................................................          6,000
   Legal ......................................................          4,500
   Independent accountants ....................................          4,000
   Custodian ..................................................          2,000
   Miscellaneous ..............................................          9,156
                                                                   -----------
   Total expenses .............................................        100,582
                                                                   -----------
Net investment income .........................................        532,436
                                                                   -----------
UNREALIZED LOSS ON INVESTMENTS
Net change in unrealized appreciation on
 investments ..................................................       (163,399)
                                                                   -----------
NET INCREASE IN NET INVESTMENT ASSETS
RESULTING FROM OPERATIONS .....................................    $   369,037
                                                                   ===========

                       See Notes to Financial Statements.

                                       7
<PAGE>

--------------------------------------------------------------------------------
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,
                                                        2000           1999
                                                     -----------    -----------
INCREASE (DECREASE) IN INVESTMENT ASSETS

OPERATIONS:
 Net investment income ...........................   $   532,436    $ 1,054,501
 Net realized gain on investments ................            --         42,400
 Net change in unrealized appreciation
  on investments .................................      (163,399)    (1,146,734)
                                                     -----------    -----------
 Net increase (decrease) in net investment
  assets resulting from operations ...............       369,037        (49,833)

DIVIDENDS:
 To common shareholders from net
  investment income ..............................      (426,714)      (883,630)
 To preferred shareholders from net
  investment income ..............................      (117,178)      (222,879)
                                                     -----------    -----------
 Total dividends .................................      (543,892)    (1,106,509)
                                                     -----------    -----------
  Total decrease .................................      (174,855)    (1,156,342)

NET INVESTMENT ASSETS
Beginning of period ..............................    21,938,857     23,095,199
                                                     -----------    -----------
End of period (net of undistributed net
 investment income of $12,973 and
 $24,429, respectively) ..........................   $21,764,002    $21,938,857
                                                     ===========    ===========

                       See Notes to Financial Statements.

                                       8
<PAGE>

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

<TABLE>
<CAPTION>
                                                  SIX MONTHS ENDED                        YEAR ENDED OCTOBER 31,
                                                      APRIL 30,        -----------------------------------------------------------
                                                         2000            1999         1998         1997         1996         1995
                                                       -------         -------      -------      -------      -------      -------
<S>                                                    <C>             <C>          <C>          <C>          <C>          <C>
PER COMMON SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ..............    $ 14.34         $ 15.49      $ 14.77      $ 14.20      $ 13.85      $ 11.74
                                                       -------         -------      -------      -------      -------      -------
 Net investment income ............................        .53            1.05         1.05         1.07         1.08         1.05
 Net realized and unrealized gain (loss)
   on investments .................................       (.17)          (1.10)         .79          .61          .33         2.12
                                                       -------         -------      -------      -------      -------      -------
Net increase (decrease) from investment
   operations .....................................        .36           (0.05)        1.84         1.68         1.41         3.17
                                                       -------         -------      -------      -------      -------      -------
Dividends and Distributions:
 Dividends from net investment income to:
   Common shareholders ............................       (.42)           (.88)        (.88)        (.87)        (.80)        (.79)
   Preferred shareholders .........................       (.12)           (.22)        (.24)        (.24)        (.25)        (.27)
 Distributions in excess of net realized
   gains on investments to:
   Common shareholders ............................         --              --           --           **         (.01)          --
   Preferred shareholders .........................         --              --           --           **           **           --
                                                       -------         -------      -------      -------      -------      -------
Total dividends and distributions .................       (.54)          (1.10)       (1.12)       (1.11)       (1.06)       (1.06)
                                                       -------         -------      -------      -------      -------      -------
Net asset value, end of period* ...................      14.16         $ 14.34      $ 15.49      $ 14.77      $ 14.20      $ 13.85
                                                       =======         =======      =======      =======      =======      =======
Per share market value, end of period* ............    $ 13.75         $ 15.50      $16.125      $ 15.00      $ 13.50      $12.625
                                                       =======         =======      =======      =======      =======      =======
TOTAL INVESTMENT RETURN+: .........................      (8.73)%          1.52%       13.70%       17.98%       13.80%       26.86%
RATIOS TO AVERAGE NET ASSETS OF COMMON
 SHAREHOLDERS:
Expenses++ ........................................       1.38%+++        1.34%        1.36%        1.32%        1.42%        1.52%
Net investment income before preferred
  stock dividends++ ...............................       7.46%+++        6.95%        6.93%        7.48%        7.78%        8.24%
Preferred stock dividends .........................       1.64%+++        1.47%        1.60%        1.70%        1.82%        2.09%
Net investment income available to common
  shareholders ....................................       5.82%+++        5.48%        5.33%        5.78%        5.96%        6.15%
SUPPLEMENTAL DATA:
Average net assets of common shareholders
  (in thousands) ..................................    $14,343         $15,170      $15,265      $14,445      $13,996      $12,892
Portfolio turnover ................................          0%              4%           0%          28%          72%         149%
Net assets of common shareholders, end
  of period (in thousands) ........................    $14,264         $14,439      $15,595      $14,873      $14,296      $13,946
Asset coverage per share of preferred
  stock, end of period ............................    $72,557         $73,138      $76,990      $74,583      $72,654      $71,485
Preferred stock outstanding (in thousands) ........    $ 7,500         $ 7,500      $ 7,500      $ 7,500      $ 7,500      $ 7,500
</TABLE>

----------

*   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 return
    for periods less than one full year is 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
<PAGE>

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

NOTE 1. ORGANIZATION & ACCOUNTING POLICIES

The BlackRock  California  Investment Quality Municipal Trust Inc. (the "Trust")
was  organized  in Maryland on 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 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 60  days  or less  are  valued  at
amortized  cost,  if their term to maturity  from date of purchase is 60 days or
less.  Short-term  securities with a term to maturity  greater than 60 days from
the date of purchase are valued at current market  quotations  until maturity or
disposition.

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 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.

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.

NOTE 2. AGREEMENTS

The Trust has an Investment  Advisory Agreement with BlackRock  Advisors,  Inc.,
(the "Advisor"), a wholly-owned subsidiary of BlackRock Advisors, Inc., which is
a  wholly-owned  subsidiary  of  BlackRock,  Inc.,  which in turn is an indirect
majority-owned subsidiary of PNC Financial Services Group, Inc. The Trust has an
Administration   Agreement  with  Prudential  Investments  Fund  Management  LLC
("PIFM"),  a  wholly-owned  subsidiary of The  Prudential  Insurance  Company of
America.

                                       10
<PAGE>


    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 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 SECURITIES

Purchase and sales of invest ment securities, other than short-term investments,
for  the  period  ended  April  30,  2000   aggregated   $642,250  and  $45,000,
respectively.

    The federal  income tax basis of the Trust's  investments  at April 30, 2000
was  substantially the same as the basis for financial  reporting  purposes and,
accordingly, net and gross unrealized appreciation was $1,120,160.

    For federal income tax purposes,  the Trust had a capital loss  carryforward
at  October  31,  1999 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, 2000, the Advisor owned 7,093 shares.  As of April 30, 2000 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 2.5% to 4.38%
during the period ended April 30, 2000.

    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 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, 2000,  the Board of  Directors of the Trust  declared a
dividend from undistributed  earnings of $0.065625 per common share payable June
1, 2000 to shareholders of record on May 15, 2000.

    For the period May 1, 2000 to May 31, 2000,  dividends declared on Preferred
Stock totalled $26,912 in aggregate for the outstanding Preferred Stock.

                                       11
<PAGE>


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

    Pursuant  to  the  Trust's   Dividend   Reinvestment   Plan  (the   "Plan"),
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,  state or local income taxes 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
<PAGE>


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

    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 18, 2000 to vote on
the following matters:

    (1) To elect three Directors as follows:

        DIRECTOR                                CLASS      TERM        EXPIRING
        --------                                -----      ----        --------
        Andrew F. Brimmer ...................    III      3 years        2003
        Kent Dixon ..........................    III      3 years        2003
        Laurence D. Fink ....................    III      3 years        2003

        Directors whose term of office continues beyond this meeting are Richard
        E. Cavanagh,  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 October 31, 2000.

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

                                                VOTES      VOTES
                                                 FOR      AGAINST    ABSTENTIONS
                                                 ---      -------    -----------
    Andrew F. Brimmer .......................  661,081       --        285,006
    Kent Dixon ..............................  661,281       --        284,806
    Laurence D. Fink ........................  661,281       --        284,806
    Ratification of Deloitte & Touche LLP ...  931,423     4,476        10,188

                                       13
<PAGE>

--------------------------------------------------------------------------------
        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")  is  an  SEC-registered  investment
advisor.  As  of  March  31,  2000,  the  Advisor  and its affiliates (together,
"BlackRock")  managed  $173  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-two closed-end funds that are traded on either the New
York  or  American  stock exchanges, and a $29 billion family of open-end funds.
BlackRock  manages  over  590  accounts,  domiciled  in  the  United  States and
overseas.


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.


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

The  Trust's  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 fund 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 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  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
<PAGE>


--------------------------------------------------------------------------------
        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:   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   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  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
<PAGE>


--------------------------------------------------------------------------------
                            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 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
                                                                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
<PAGE>


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

    BlackRock  Advisors,  Inc. (the "Advisor") is an  SEC-registered  investment
advisor.  As of March  31,  2000,  the  Advisor  and its  affiliates  (together,
"BlackRock")  managed $173 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-two
closed-end  funds  that are  traded on  either  the New York or  American  stock
exchanges,  and a $29 billion family of open-end funds.  BlackRock  manages over
590 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 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 ADVISOR
BlackRock Advisors, Inc.
400 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, 2000 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

[RECYCLE LOGO] Printed on recycled paper                             09247U-10-7
                                                                     09247F-10-0

     ---------
     BlackRock
The  ---------
California
Investment Quality
Municipal Trust Inc.
--------------------
Semi-annual Report
April 30, 2000


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