BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 1997-06-30
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- ------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISER
- ------------------------------------------------------------------------------




                                                                   May 30, 1997



Dear Trust Shareholder:
      Domestic bond investors have experienced higher interest rates in the face
of a  resilient  stock  market and  stronger  economic  growth over the past six
months.  However,  as a  pre-emptive  strike at inflation,  the Federal  Reserve
raised the  Federal  funds  target  rate  one-quarter  of a point at their March
policy meeting.

      BlackRock expects that both production and consumption will continue to be
strong in the coming months.  However,  the combined  effects of higher interest
rates and already  rising  consumer debt should lead to more  moderate  economic
growth  later  in 1997.  Despite  inflation  remaining  relatively  low,  strong
consumer  confidence and robust  industrial  activity suggest that the potential
for future inflation exists. Therefore, BlackRock currently maintains a cautious
fundamental  outlook  for  bonds.  While we believe  that one or two  additional
interest  rate  increases by the Fed may still be  necessary to temper  economic
growth,  it does not appear that 1997 will be a repeat of the  dramatic  rise in
short term interest rates that the market witnessed in 1994.

      This report  provides the Trust's  portfolio  managers an  opportunity  to
provide you with  detailed  market  commentary  and review the major themes that
have occurred in the portfolio  over the past six months.  We hope that you find
this report  informative and look forward to serving your financial needs in the
future.


Sincerely,


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

                                       1
<PAGE>

                                                                   May 30, 1997


Dear Shareholder:

      We are  pleased  to  present  the  semi-annual  report  for The  BlackRock
California  Investment  Quality  Municipal  Trust Inc. ("the Trust") for the six
months ended April 30, 1997.  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,  and certain  territories  and possessions of the United
States.

      The table below  summarizes the performance of the Trust's stock price and
net asset value over the period:
<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------------
                                                 4/30/97      10/31/96        CHANGE          HIGH           LOW
- -------------------------------------------------------------------------------------------------------------------
<S>                                              <C>           <C>            <C>           <C>            <C>
  Stock Price                                    $14.25        $13.50          5.56%         $14.50        $13.50
- -------------------------------------------------------------------------------------------------------------------
  Net Asset Value (NAV)                          $14.00        $14.20         (1.41%)        $14.51        $13.78
- -------------------------------------------------------------------------------------------------------------------
</TABLE>

THE FIXED INCOME MARKETS

      Stronger  economic  data and  accompanying  inflation  fears  caused  U.S.
Treasury yields to rise during the six month period between November 1, 1996 and
April 30, 1997. After reaching their lowest levels since March of 1996, Treasury
yields began rising in December after Federal Reserve  Chairman Alan Greenspan's
commentary  on  "irrational  exuberance"  in  the  financial  markets.  Although
inflationary  measures such as commodity,  producer and consumer prices remained
relatively  stable,  tight labor markets and strong consumer  confidence led the
Federal  Reserve to raise the Federal  funds rate by 25 basis  points  (1/4%) at
their March 25, 1997 monetary policy meeting to  pre-emptively  fight inflation.
Hints  of  moderating   economic  growth  during  April  proved  to  be  a  more
accommodating  environment for bonds, as Treasury yields fell towards  month-end
in  response  to a  strong  dollar,  rising  stock  market  and  optimism  for a
balanced-budget agreement.

      For the six month  period,  the yield of the  10-year  Treasury  note rose
0.37% to end April 1997 at 6.71%. However, the 10-year's yield reached a high of
6.98%  in  mid-April  before  falling  the last  two  weeks of the  month as the
likelihood  for another  interest  rate hike by the  Federal  Reserve at the May
meeting decreased. The 10-year municipal general obligation's yield rose only 15
basis points to end the period at 5.05%.

      California's  economic expansion  continues to outpace that of the rest of
the United States. For example,  California's March unemployment rate fell 6.5%,
which   represented  the  state's  largest  one  month  decrease  in  a  decade.
Conversely,  1996 personal income increased 6.5% over the previous year,  giving
California  residents more purchasing power.  Additionally,  exports through the
state's  ports  continue to grow despite the sluggish  economies of some trading
partners further indicating the strength of California's economy.

      Municipal bonds outperformed their taxable  counterparts over the past six
months, with longer maturity municipals generally outperforming shorter maturity
issues. The municipal market, as measured by the  LehmanBrothers  Municipal Bond
Index,  posted a 2.01% total return from  November 1, 1996 through April 1997 as
compared  against  the Lehman  Aggregate  Index's  return of 1.71% over the same
period.  Investor  demand for longer  dated  municipal  issues was  particularly

                                       2
<PAGE>


pronounced during the first quarter of 1997, in part because of a 10% decline in
new issuance due to a higher  interest rate  environment.  Additionally,  rising
interest rates created  increased demand from fixed income  investors  searching
for attractive  after-tax yields and as a potential  shelter from the volatility
of the equity markets.

      Looking ahead,  BlackRock  will seek to take advantage of potential  price
weakness in short and  intermediate  maturity  municipals.  We believe  that new
municipal  supply will remain low and that strong investor demand should provide
a favorable environment for municipal bonds in the coming months.


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 at about 35% of total assets to
enhance its income by borrowing at short term municipal  rates and investing the
proceeds in longer maturity issues which have higher yields. The degree to which
the Trust can  benefit  from its use of  leverage  may affect its ability to pay
high monthly income.

      The  Trust  has  been  emphasizing  premium  callable  bonds,  which  have
performed  extremely  well as market  demand  has  increased  for  bonds  with a
defensive structure. As a result of their strong performance, the Trust may seek
to reduce its exposure to premiums and reallocate into par bonds.  Additionally,
the Trust is  currently  seeking  opportunities  to reduce its exposure to lower
rated  investment  grade  credits  (BBB and A),  as the yield  differential  (or
"spread")  between  lower and higher  rated  credits has  narrowed.  Due to this
narrowing of credit  spreads,  which reduces the amount of extra yield investors
receive by buying a lower rated credit,  the Trust now favors moving into higher
credit bonds because of the relatively small yield give-up.

      The  following  charts  compare the  Trust's  current and October 31, 1996
asset composition and credit quality allocations:


                                SECTOR BREAKDOWN
   SECTOR                               APRIL 30, 1997     OCTOBER 31, 1996
- ---------------------------------------------------------------------------
 Transportation                               20%                 23%
- ---------------------------------------------------------------------------
 University                                   20%                 10%
- ---------------------------------------------------------------------------
 Power                                        15%                 19%
- ---------------------------------------------------------------------------
 City, County & State                         14%                  9%
- ---------------------------------------------------------------------------
 Lease                                        11%                 10%
- ---------------------------------------------------------------------------
 Housing                                      10%                 10%
- ---------------------------------------------------------------------------
 Water & Sewer                                 5%                 14%
- ---------------------------------------------------------------------------
 Student Loans                                 5%                  --
- ---------------------------------------------------------------------------
 Miscellaneous Revenue                         --                  5%
- ---------------------------------------------------------------------------

                                       3
<PAGE>

- ------------------------------------------------------------------------------
  STANDARD & POOR'S/MOODY'S/FITCH'S
            CREDIT RATING               APRIL 30, 1997       OCTOBER 31, 1996
- ------------------------------------------------------------------------------
               AAA/Aaa                        50%                   42%
- ------------------------------------------------------------------------------
                AA/Aa                         18%                   20%
- ------------------------------------------------------------------------------
                 A/A                          21%                   25%
- ------------------------------------------------------------------------------
               BBB/Baa                        11%                   13%
- ------------------------------------------------------------------------------

      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 yours,


/s/ Robert Kapito                       /s/ Kevin Klingert
- -----------------                       ------------------
Robert Kapito                           Kevin Klingert
Vice Chairman and Portfolio Manager     Managing Director and Portfolio Manager
BlackRock Financial Management, Inc.    BlackRock Financial Management, 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 4/30/97:                               $14.25
- -------------------------------------------------------------------------------
   Net Asset Value as of 4/30/97:                                   $14.00
- -------------------------------------------------------------------------------
   Yield on Closing Stock Price as of 4/30/97 ($14.25)1:             6.16%
- -------------------------------------------------------------------------------
   Current Monthly Distribution per Share2:                        $0.073125
- -------------------------------------------------------------------------------
   Current Annualized Distribution per Share2:                      $0.8775
- -------------------------------------------------------------------------------

1 Yield on Closing Stock Price is  calculated by dividing the current annualized
  distribution per share by the closing stock price per share.
2 The distribution is not constant and is subject to change.

                                       4
<PAGE>

- -------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 1997 (UNAUDITED)
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
         PRINCIPAL                                                                           OPTION
          AMOUNT                                                                              CALL            VALUE
RATING*    (000)                                DESCRIPTION                                PROVISIONS+      (NOTE 1)
- ---------------------------------------------------------------------------------------------------------------------------
<S>       <C>        <C>                                                                  <C>              <C>

                     LONG-TERM INVESTMENTS--146.2%
                     California Educational Facilities Auth. Rev.,
AAA       $1,000       Santa Clara Univ., 5.00%, 9/01/15, MBIA .........................  9/06 at 102      $  921,850
AAA        1,000       Student Loan Program, Ser. A, 6.00%, 3/01/16, MBIA ..............  3/07 at 102         998,230
A1         1,000     California St. G.O., 5.75%, 3/01/19 ...............................  3/05 at 101         990,030
                     California St. Hsg. Fin. Agcy. Rev., Home Mtge.,
Aa           970       Ser. B-1, 6.45%, 2/01/11 ........................................  8/04 at 102         988,420
Aa         1,000       Ser. G, 7.20%, 8/01/14 ..........................................  8/04 at 102       1,052,510
                     California St. Pub. Wks. Brd. Lease Rev.,
Aaa        1,000       Dept. of Corrections, Ser. A, 6.875%, 11/01/04 ++ ............... 11/04 at 102       1,133,100
A1         1,000       St. Univ. Proj., Ser. A, 6.10%, 10/01/06 ........................ 10/04 at 102       1,068,040
AAA        1,000       St. Univ. Proj., Ser. A., 6.40%, 12/01/02, AMBAC, ++ ............ 12/02 at 102       1,092,720
Baa        1,385     Foothill / Eastern Trans. Agcy., Ser. A, Zero Coupon, 1/01/04 ..... No Opt. Call         944,902
AAA        1,000     Los Angeles County, Special Tax, Ser. A, 5.50%, 9/01/14, FSA ...... No Opt. Call         973,600
AA         1,150     Los Angeles Harbor Dept. Rev., Ser. B, 6.00%, 8/01/13 .............  8/06 at 101       1,171,045
AAA        1,000     Los Angeles Met. Trans. Auth. Sales Tax Rev., 6.00%, 7/01/26, MBIA   7/06 at 101       1,008,370
AA         1,000     Los Angeles Pub. Wks. Fin. Auth. Rev., Regl. Park & Open
                       Space Dist. A, 6.00%, 10/01/15 .................................. 10/04 at 102       1,012,300
BBB-       1,000     Sacramento Pwr. Auth., Cogeneration Proj. Rev., 6.50%, 7/01/09 ....  7/06 at 102       1,043,020
AAA        1,000     San Diego Ind. Dev. Rev., Ser. A, 5.90%, 6/01/18, AMBAC ...........  6/03 at 102       1,006,350
                     San Francisco City & Cnty.,
AAA        1,000       Arpt. Comn. Rev., Intl. Arpt., Ser. 6, 6.125%, 5/01/09, AMBAC ...  5/04 at 102       1,047,650
AAA        1,000       Sewer Rev., Ser. A, 5.95%, 10/01/25, FGIC ....................... 10/03 at 102       1,006,560
AAA        1,000     Southern California Pub. Pwr. Auth. Transmission Proj.
                       Rev., 5.50%, 7/01/20, MBIA ......................................  7/02 at 100         963,170
                     Univ. of California Rev.,
AAA        1,000       Ser. D, 6.10%, 9/01/10, MBIA ....................................  9/02 at 102       1,041,760
A-         1,135       Ser. B, 6.30%, 9/01/13 ..........................................  9/03 at 102       1,154,091
                                                                                                          -----------
                     Total long-term investments (cost $19,781,622) ....................                   20,617,718
                                                                                                          -----------
                     SHORT-TERM INVESTMENTS--11.4%
A-1+         700     California Hlth. Facs. Fin. Auth. Rev., St. Joseph Hlth.,
                       Ser. A, 3.75%, 5/01/97, FRDD ....................................          N/A         700,000
                     California Poll. Ctrl. Fin. Auth. Rev., Shell Oil Co. Proj.,
A-1+         700       Proj. B, 3.75%, 5/01/97, FRDD ...................................          N/A         700,000
A-1+         100       Ser. C, 3.75%, 5/01/97, FRDD ....................................          N/A         100,000
A-1+         100     Tustin California Improvement Bond Act 1915, 3.75%, 5/01/97 .......          N/A         100,000
                                                                                                          -----------
                     Total Short-Term Investments (cost $1,600,000) ....................                    1,600,000
                                                                                                          -----------
                     TOTAL INVESTMENTS--157.6% (COST $21,381,622) ......................                   22,217,718
                     Liabilities in excess of other assets--(4.4)% .....................                     (618,894)
                     Liquidation value of preferred stock--(53.2)% .....................                   (7,500,000)
                                                                                                          -----------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100% ................                  $14,098,824
                                                                                                          ===========
- -------------------
 * Rating: 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  FSA      -- Financial Security Assurance
         FGIC       -- Financial Guaranty Insurance Company           G.O.     -- General Obligation Bond
         FRDD       -- Floating Rate Daily Demand                     MBIA     -- Municipal Bond Insurance Association
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>

                       See Notes to Financial Statements.

                                       5
<PAGE>

- ------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1997 (UNAUDITED)
- ------------------------------------------------------------------------------

ASSETS

Investments, at value 
     (cost $21,381,622) (Note 1) ...........  $22,217,718
Cash .......................................       83,133
Interest receivable ........................      301,768
Deferred organization expenses and 
     other assets ..........................        2,102
                                              -----------
                                               22,604,721
                                              -----------
LIABILITIES
Payable for investments purchased ..........      967,083
Advisory fee payable (Note 2) ..............        6,191
Dividends payable-preferred stock ..........        5,476
Dividends payable-common stock .............        3,701
Administration fee payable (Note 2) ........        1,769
Other accrued expenses .....................       21,677
                                              -----------
                                                1,005,897
                                              -----------

NET INVESTMENT ASSETS ......................  $21,598,824
                                              ===========


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 ......      170,791
  Accumulated net realized loss ............     (815,237)
  Net unrealized appreciation ..............      836,096
                                              -----------
  Net investment assets, April 30, 1997 ....  $21,598,824
                                              ===========
Net assets applicable to common shareholders  $14,098,824
                                              ===========
Net asset value per share:
  ($14,098,824 / 1,007,093 shares of common
  stock issued and outstanding) ............       $14.00
                                                   ======

- ------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1997 (UNAUDITED)
- ------------------------------------------------------------------------------

NET INVESTMENT INCOME

Income
Interest and discount earned ................ $   639,480
                                              -----------

Expenses
  Investment advisory .......................      37,919
  Administration ............................      10,834
  Auction agent .............................       9,308
  Reports to shareholders ...................       8,000
  Directors .................................       6,000
  Transfer agent ............................       5,000
  Audit .....................................       4,000
  Legal .....................................       1,500
  Custodian .................................       1,500
  Miscellaneous .............................      14,253
                                              -----------
  Total expenses ............................      98,314
                                              -----------
Net investment income .......................     541,166
                                              -----------

REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS (NOTE 3)
Net realized gain on investments ............       1,100
Net change in unrealized appreciation
  on investments ............................    (183,776)
                                              -----------
Net loss on investments .....................    (182,676)
                                              -----------

NET INCREASE IN NET INVESTMENT
ASSETS RESULTING FROM OPERATIONS ............ $   358,490
                                              ===========


                       See Notes to Financial Statements.
                                       6
<PAGE>

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

                                                                                          FOR THE          FOR THE
                                                                                        SIX MONTHS          YEAR
                                                                                           ENDED            ENDED
INCREASE (DECREASE) IN NET INVESTMENT ASSETS                                          APRIL 30, 1997  OCTOBER 31, 1996
                                                                                       ------------    --------------
<S>                                                                                   <C>               <C>

Operations:
   Net investment income ...........................................................  $   541,166       $ 1,089,014
   Net realized gain on investments ................................................        1,100            32,195
   Net change in unrealized appreciation on investments ............................     (183,776)          298,978
                                                                                      -----------       -----------
   Net increase in net investment assets resulting from operations .................      358,490         1,420,187
Dividends and distributions:
   To common shareholders from net investment income ...............................     (434,971)         (796,360)
   To preferred shareholders from net investment income ............................     (120,027)         (254,442)
   To common shareholders in excess of net realized gains on investments ...........         (564)          (14,099)
   To preferred shareholders in excess of net realized gains on investments ........         (186)           (4,883)
                                                                                      -----------       -----------

   Total dividends and distributions ...............................................     (555,748)       (1,069,784)
                                                                                      -----------       -----------

     Total increase (decrease) .....................................................     (197,258)          350,403

NET INVESTMENT ASSETS

Beginning of period ................................................................   21,796,082        21,445,679
                                                                                      -----------       -----------
End of period ......................................................................  $21,598,824       $21,796,082
                                                                                      ===========       ===========
</TABLE>

                       See Notes to Financial Statements.

                                       7
<PAGE>

- ------------------------------------------------------------------------------
THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- ------------------------------------------------------------------------------
<TABLE>
<CAPTION>

                                                           FOR THE                                        FOR THE PERIOD
                                                         SIX MONTHS        YEAR ENDED OCTOBER 31,          JUNE 4, 1993*
                                                            ENDED      -------------------------------        THROUGH
PER SHARE OPERATING PERFORMANCE                        APRIL 30, 1997    1996         1995        1994   OCTOBER 31, 1993
                                                        ------------     ----         ----        ----    --------------
<S>                                                      <C>          <C>         <C>         <C>         <C>

Net asset value, beginning of period ................     $ 14.20      $  13.85    $  11.74     $  14.73     $  14.10
                                                         --------      --------    --------     --------     --------
   Net investment income ............................         .54          1.08        1.05         1.04          .31
   Net realized and unrealized gain
     (loss) on investments ..........................        (.19)          .33        2.12        (3.01)         .83
                                                         --------      --------    --------     --------     --------
Net increase (decrease) from investment operations ..         .35          1.41        3.17        (1.97)        1.14
                                                         --------      --------    --------     --------     --------
Dividends and Distributions:
   Dividends from net investment income to:
     Common shareholders ............................        (.43)         (.80)       (.79)        (.79)        (.20)
     Preferred shareholders .........................        (.12)         (.25)       (.27)        (.18)        (.04)
   Distributions from capital gains to:
     Common shareholders ............................          --            --          --         (.03)          --
     Preferred shareholders .........................          --            --          --         (.01)          --
   Distributions in excess of net realized gains on
       investments to:
     Common shareholders ............................         ***          (.01)        --          --            --
     Preferred shareholders .........................         ***           ***         --          --            --
                                                         --------      --------    --------     --------     --------
   Total dividends and distributions ................        (.55)        (1.06)      (1.06)       (1.01)        (.24)
                                                         --------      --------    --------     --------     --------
Capital charge with respect to issuance of
      common and preferred stock ....................          --            --          --         (.01)        (.27)
                                                         --------      --------    --------     --------     --------
Net asset value, end of period** ....................    $  14.00      $  14.20    $  13.85     $  11.74     $  14.73#
                                                         ========      ========    ========     ========     ========
PER SHARE MARKET VALUE, END OF PERIOD** .............    $  14.25      $  13.50    $ 12.625     $  10.625    $  14.00
                                                         ========      ========    ========     ========     ========
TOTAL INVESTMENT RETURN+: ...........................       6.12%        13.80%      26.86%     (18.85)%         .68%
RATIOS TO AVERAGE NET ASSETS OF COMMON SHAREHOLDERS++:
Expenses ............................................       1.38%+++      1.42%       1.52%        1.25%        1.07%+++
Net investment income before preferred stock 
  dividends .........................................       7.58%+++      7.78%       8.24%        7.81%        5.31%+++
Preferred stock dividends ...........................       1.68%+++      1.85%       2.09%        1.41%        0.73%+++
Net investment income available to common
  shareholders ......................................       5.90%+++      5.93%       6.15%        6.40%        4.58%+++
SUPPLEMENTAL DATA:
Average net assets of common shareholders 
  (in thousands) ....................................    $ 14,279      $ 13,996    $ 12,892     $ 13,362     $ 14,504
Portfolio turnover rate .............................         26%           72%        149%         184%          13%
Net assets of common shareholders, end of period
      (in thousands) ................................    $ 14,099      $ 14.296    $ 13,946     $ 11,826     $ 14,836
Asset coverage per share of preferred stock,
      end of period## ...............................    $ 72,014      $ 72,654    $ 71,485     $128,837     $148,910
Preferred stock outstanding (in thousands) ..........    $  7,500      $  7,500    $  7,500     $  7,500     $  7,500
</TABLE>
 
- -------------------
    * Commencement of investment operations.
   ** Net asset value and market value are published in THE WALL STREET JOURNAL
      each Monday.
  *** Actual  amount  paid for the six  months  ended  April 30,  1997 to common
      shareholders  was  $0.00056 per share and to  preferred  shareholders  was
      $0.00019 per common share.  Actual  amount paid to preferred  shareholders
      for the year ended  October 31, 1996 was $0.0048 per common  share.  # Net
      asset value immediately after the closing of the first public offering was
      $14.01.
   ## A stock split occurred on July 24, 1995 (Note 4).
    + Total  investment  return is  calculated  assuming  a purchase  of common
      stock  at the  current  market  value on the  first  day and a sale at the
      current  market price on the last day of each period  reported.  Dividends
      and  distributions  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,  expenses and  preferred
      stock  dividends  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 period 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.


                                       8
<PAGE>


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

NOTE 1. ACCOUNTING            The BlackRock California
POLICIES                      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 had no  transactions  until May 27,  1993 when it sold 7,093
shares of common  stock for $100,012 to BlackRock  Financial  Management,  Inc.,
(the "Adviser"). Investment operations commenced on June 4, 1993.

   The Trust's  investment  objective is to provide 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  a  pricing  service  which  uses   information   with  respect  to
transactions  in bonds,  quotations  from bond dealers,  market  transactions in
comparable   securities  and  various   relationships   between   securities  in
determining values. Any securities or other assets for which such current market
quotations  are not readily  available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.

   Short-term securities which mature in more than 60 days are valued at current
market  quotations.  Short-term  securities  which mature in 60 days or less are
valued at amortized  cost, if their term to maturity from date of purchase is 60
days or less,  or, by amortizing  their value on the 61st day prior to maturity,
if their original term to maturity from date of purchase exceeded 60 days.

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME:  Securities  transactions  are
recorded  on the trade  date.  Realized  and  unrealized  gains and  losses  are
calculated  on the  identified  cost basis.  Interest  income is recorded on the
accrual  basis and the Trust  accretes  original  issue  discounts  or amortizes
premium on securities purchased using the interest method.

FEDERAL INCOME TAXES: For federal income tax purposes, the Trust is treated as a
separate taxpaying entity. It is the intent of the Trust to continue to meet the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies  and to  distribute  all of its 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.

DEFERRED  ORGANIZATION  EXPENSES:  A total of $16,000 was incurred in connection
with the organization of the Trust. These costs have been deferred and are being
amortized  ratably  over a period  of  sixty  months  from  the  date the  Trust
commenced investment operations.

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

NOTE 2. AGREEMENTS            The Trust has an Investment
                              Advisory   Agreement  with   BlackRock   Financial
Management,  Inc., (the "Adviser"),  a wholly-owned  corporate subsidiary of PNC
Asset  Management  Group,  Inc., the holding company for PNC's asset  management
businesses and an  Administration  Agreement with  Prudential  Investments  Fund
Management LLC ("PIFM"), an indirect,  wholly-owned subsidiary of The Prudential
Insurance Company of America.

   The investment fee paid to the Adviser is computed weekly and payable monthly
at an annual rate of 0.35% of the Trust's average weekly net investment  assets.
The  administration fee

                                       9
<PAGE>

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

NOTE 3. PORTFOLIO             Purchases  and  sales  of  investment securities,
SECURITIES                    other  than short-term  investments, for  the six
                              months ended April 30, 1997 aggregated $5,565,003
and $6,341,643, respectively.

   The federal income tax basis of the Trust's investments at April 30, 1997 was
substantially  the same as the basis for financial  reporting and,  accordingly,
net unrealized  appreciation for federal income tax purposes was $836,096 (gross
unrealized appreciation--$851,018; gross unrealized depreciation--$14,922).

   For federal income tax purposes, the Trust had a capital loss carryforward at
October  31,  1996  of  approximately   $817,000  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. Of  the 1,007,093  shares
 outstanding at April 30, 1997,  the Adviser  owned 7,093  shares.  As of  April
 30, 1997 there were 300 shares of Preferred  Stock Series W7 outstanding.

   Offering costs ($104,994) incurred in connection with the underwriting of the
Trust's  common stock have been  charged to paid-in  capital in excess of par of
the common stock.

   The Trust may classify or reclassify any unissued shares of common stock into
one or more series of preferred  stock. On July 29, 1993 the Trust  reclassified
150 shares of common stock and issued a series of Auction Market Preferred Stock
("Preferred  Stock") Series W7. The Preferred  Stock had a liquidation  value of
$50,000 per share plus any  accumulated  but unpaid  dividends.  On May 16, 1995
shareholders approved a proposal to split each share of Preferred Stock into two
shares and  simultaneously  reduce  each  share's  liquidation  preference  from
$50,000 to $25,000 plus any  accumulated but unpaid  dividends.  The stock split
occurred on July 24, 1995.

   Underwriting  discounts  ($112,500) and offering costs ($75,344)  incurred in
connection  with the  Preferred  Stock  offering  have been  charged  to paid-in
capital in excess of par of the common stock.

   Dividends on Series W7 are  cumulative  at a rate which is reset every 7 days
based on the results of an auction.  Dividend  rates  ranged from 3.00% to 3.87%
during the period ended April 30, 1997.

   The Trust may not declare dividends or make other  distributions on shares of
common  stock or purchase  any such  shares if, at the time of the  declaration,
distribution,  or  purchase,  asset  coverage  with  respect to the  outstanding
Preferred Stock would be less than 200%.

   The Preferred  Stock is redeemable at the option of the Trust, in whole or in
part, on any dividend  payment date at $25,000 per share plus any accumulated or
unpaid dividends whether or not declared. The Preferred Stock is also subject to
mandatory  redemption  at  $25,000  per  share  plus any  accumulated  or unpaid
dividends,  whether or not  declared  if certain  requirements  relating  to the
composition  of the  assets  and  liabilities  of the  Trust as set forth in the
Articles of Incorporation are not satisfied
..
   The holders of  Preferred  Stock have voting  rights  equal to the holders of
common stock (one vote per share) and will vote  together with holders of shares
of common stock as a single class. However,  holders of Preferred Stock are also
entitled to elect two of the Trust's  directors.  In  addition,  the  Investment
Company Act of 1940 requires that along with approval by stockholders that might
otherwise  be  required,  the  approval  of the  holders  of a  majority  of any
outstanding  preferred shares, voting separately as a class would be required to
(a) adopt any plan of  reorganization  that would adversely affect the preferred
shares 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, 1997, the Board of
                              Directors of the Trust declared a dividend from
undistributed  earnings of $0.073125  per common  share  payable May 30, 1997 to
shareholders of record on May 15, 1997.

     For the period May 1, 1997 to May 31, 1997, dividends declared on Preferred
Stock totalled $23,371 in aggregate for the outstanding Preferred Stock.

                                       10
<PAGE>

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

      Pursuant  to  the  Trust's  Dividend   Reinvestment   Plan  (the  "Plan"),
shareholders will  automatically 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  unless an election is made to receive  such
amounts in cash.  The Plan Agent will effect  purchases of shares under the Plan
in the open market.  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 in connection with the Plan.

      Participants in the Plan may withdraw from the Plan upon written notice to
the Plan Agent and will receive  certificates  for whole Trust shares and a cash
payment for any fraction of a Trust shares.

      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.

      Experience  under  the Plan  may  indicate  that  changes  are  desirable.
Accordingly,  the Trust  reserves  the right to amend or  terminate  the Plan as
applied to any dividend or distribution paid subsequent to written notice of the
change sent to all  shareholders of the Trust at least 90 days before the record
date for the dividend or distribution.  The Plan also may be amended by the Plan
Agent upon at least 90 days' written  notice to all  shareholders  of the Trust.
The Plan may be  terminated by the Plan Agent or the Trust upon at least 30 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.

- ------------------------------------------------------------------------------
                             ADDITIONAL INFORMATION
- ------------------------------------------------------------------------------

      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 April 15, 1997 to vote
      on the following matters:

 (1)To elect four Directors to serve as follows:

    DIRECTOR                      CLASS             TERM           EXPIRING
    -------                       -----             ----            -------
    Andrew F. Brimmer ..........   III             3 years           2000
    Kent Dixon .................   III             3 years           2000
    Laurence D.Fink ............   III             3 years           2000
    Walter F. Mondale ..........   II              3 years           2000

Directors  whose term of office  continues  beyond  this  meeting are Richard E.
Cavanagh,  James Grosfeld,  James Clayburn  LaForce,  Jr., Frank J.Fabozzi,  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, 1997.

     Shareholders  elected the four  Directors  and  ratified  the  selection of
Deloitte &Touche LLP. The results of the voting was as follows:
<TABLE>
<CAPTION>

                                                                VOTES FOR       VOTES AGAINST     ABSTENTIONS
                                                                 -------         -----------      -----------
<S>                                                              <C>              <C>                <C>

  Andrew F. Brimmer ............................................ 669,424              0              5,400
  Kent Dixon ................................................... 668,548              0              6,275
  Laurence F.Fink .............................................. 669,424              0              5,400
  Walter F. Mondale ............................................ 668,548              0              6,275
  Ratification of Deloitte &Touche LLP ......................... 667,380            5,402            2,042
</TABLE>

                                       11
<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  Financial  Management,  Inc.  ("BlackRock"  or the  "Adviser") is the
investment adviser for the Trust.  BlackRock is a registered  investment adviser
specializing in fixed income securities.  Currently,  BlackRock manages over $48
billion of assets  across the  government,  mortgage,  corporate  and  municipal
sectors.  These  assets are managed on behalf of  institutional  and  individual
investors in 21 closed-end funds traded on either the New York or American Stock
Exchanges,  several  open-end  funds and over 100 separate  accounts for various
clients  in the U.S.  and  overseas.  BlackRock  is a  subsidiary  of PNC  Asset
Management  Group  which is a division  of PNC Bank,  N.A.,  one of the  nations
largest banking organizations.


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  investment  grade  ("BBB" by
Standard & Poor's and "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 Adviser.
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 ADVISER'S INVESTMENT STRATEGY?

The Adviser 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.  The Adviser  actively
manages the assets in relation to market  conditions  and interest rate changes.
Depending  on yield and  portfolio  allocation  considerations,  the Adviser 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.  The Trust issued  preferred  stock to leverage  the  portfolio at
approximately  35% of total assets.  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 last business day of the
month. For shares held in the shareholder's name, dividends may be reinvested in
additional  shares of the fund through the Trust's transfer agent,  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.


                                       12
<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 BlackRock
consider that  reduction to be in the best  interests of the Trust.  BlackRock'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  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.


                                       13
<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 NEW
YORK TIMES or THE WALL STREET JOURNAL each Monday.

PREMIUM:

When a fund's stock price is greater than its net asset value,  the fund is said
to be trading at a premium.

PRE-REFUNDED 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.

                                       14
<PAGE>

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


TAXABLE TRUSTS
- ------------------------------------------------------------------------------

                                                         STOCK     MATURITY
PERPETUAL TRUSTS                                        SYMBOL       DATE
                                                        ------      ------

The BlackRock Income Trust Inc.                          BKT          N/A
The BlackRock North American Government 
     Income Trust Inc.                                   BNA          N/A

TERM TRUSTS
The BlackRock 1998 Term Trust Inc.                       BBT         12/98
The BlackRock 1999 Term Trust Inc.                       BNN         12/99
The BlackRock Target Term Trust Inc.                     BTT         12/00
The BlackRock 2001 Term Trust Inc.                       BLK         06/01
The BlackRock Strategic Term Trust Inc.                  BGT         12/02
The BlackRock Investment Quality Term Trust Inc.         BQT         12/04
The BlackRock Advantage Term Trust Inc.                  BAT         12/05
The BlackRock Broad Investment Grade 2009 Term 
     Trust Inc.                                          BCT         12/09



TAX EXEMPT TRUSTS
- ------------------------------------------------------------------------------

                                                            STOCK     MATURITY
PERPETUAL TRUSTS                                           SYMBOL       DATE
                                                           ------      ------

The BlackRock Investment Quality Municipal Trust Inc.       BKN          N/A
The BlackRock California Investment Quality 
     Municipal Trust Inc.                                   RAA          N/A
The BlackRock Florida Investment Quality
      Municipal Trust                                       RFA          N/A
The BlackRock New Jersey Investment Quality
      Municipal Trust Inc.                                  RNJ          N/A
The BlackRock New York Investment Quality 
     Municipal Trust Inc.                                   RNY          N/A

TERM TRUSTS
The BlackRock Municipal Target Term Trust Inc.              BMN         12/06
The BlackRock Insured Municipal 2008 Term Trust Inc.        BRM         12/08
The BlackRock California Insured Municipal 2008
      Term Trust Inc.                                       BFC         12/08
The BlackRock Florida Insured Municipal 2008
      Term Trust                                            BRF         12/08
The BlackRock New York Insured Municipal 2008
      Term Trust Inc.                                       BLN         12/08
The BlackRock Insured Municipal Term Trust Inc.             BMT         12/10


                      IF YOU WOULD LIKE FURTHER INFORMATION
                 PLEASE CALL BLACKROCK AT (800) 227-7BFM (7236)
                     OR CONSULT WITH YOUR FINANCIAL ADVISOR.


                                       15
<PAGE>

BLACKROCK

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

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

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

ADMINISTRATOR
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
Bankers Trust Company 4
Albany Street New York, NY 10006

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

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

   The accompanying  financial  statements as of April 30, 1997 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
                                                                   09247U-10-7
[LOGO] Printed on recycled paper                                   09247U-20-6


==============================================================================

The BLACKROCK
California
Investment Quality
Municipal Trust Inc.
- --------------------
Semi-Annual Report
April 30, 1997


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