BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 1996-06-27
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- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------

                                                                    May 31, 1996

Dear Trust Shareholder:

    After posting  strong  returns  during 1995,  the fixed income  markets have
given  back much of their  gains in 1996 in  response  to a  strengthening  U.S.
economy.  Accelerating  economic  growth has raised  concerns about an increased
inflationary   environment,   which  could  erode  the  value  of  fixed  income
investments.  The  stronger  economy  also has led some market  participants  to
consider the possibility that the Federal Reserve may increase interest rates to
thwart  inflation  threats after three  interest rate  reductions  over the past
twelve months.

    Despite the pick-up in economic growth, we believe that current inflationary
fears will  subside.  Commodity  prices have risen but  manufacturers  will have
difficulty  passing  along the  increased  costs of raw  materials to consumers,
whose debt levels as a percentage of disposable  income are at the highest point
since the recessionary highs of 1990. We believe that the overleveraged consumer
will have to retrench,  restricting  future  economic  expansion  and creating a
positive environment for bonds in the latter half of this year.

    The following  semi-annual  report provides detailed market commentary and a
review of portfolio  management  activity.  We believe that BlackRock's duration
controlled  management  style and risk management  capabilities  will allow each
of our Trusts to achieve its long-term investment objective.

    We look forward to  maintaining  your respect and  confidence and to serving
your financial needs in the coming years.

Sincerely,

Laurence D. Fink                   Ralph L. Schlosstein
Chairman                           President


                                       1
<PAGE>

                                                                    May 31, 1996

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, 1996.  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  performance of the Trust's stock price and
net asset value over the period:

                                ------------------------------------------------
                                   4/30/96  10/31/95  Change   High       Low
- --------------------------------------------------------------------------------
Stock Price                        $12.375   $12.625  (1.98%)  $13.25   $12.375
- --------------------------------------------------------------------------------
Net Asset Value (NAV)              $13.59    $13.85   (1.88%)  $14.520  $13.430
- --------------------------------------------------------------------------------

The Fixed Income Markets

    The  domestic  fixed  income  markets  witnessed  two  profoundly  different
environments  during the past six months,  providing an exciting and challenging
environment  in which to manage the Trust.  The  Treasury  market  rally of 1995
continued through the middle of February 1996, as market demand for fixed income
securities remained strong due to a combination of moderate economic growth, low
absolute  levels of inflation  and two  reductions of the Fed funds target rate.
The rally halted during mid-February,  however, as data indicating  accelerating
economic growth, in conjunction with a sharp rise in commodity prices, rekindled
inflationary  concerns.  Positive  news  for  the  economy  which  may  indicate
increased  levels of inflation can cause bond yields to rise and prices to fall.
The  March  8  release  of  the  February  employment  report,  which  showed  a
surprisingly  strong gain of 705,000 new jobs (subsequently  revised downward to
624,000), produced the largest one-day price decline in U.S. bond prices in over
seven years.  For the first quarter of 1996,  economic growth as measured by GDP
grew 2.8%,  which  represented a strong rebound from the 0.5% gain posted in the
fourth quarter of 1995.

    Municipal bond performance  mirrored that of its Treasury  counterparts,  as
yields declined  through early 1996 before rising with the taxable bond market's
reversal  in  February.  Municipals  lagged  the  Treasury  market in the fourth
quarter of 1995 for three main reasons:  1) supply  increased in response to the
lower interest rate environment; 2) the tremendous performance of the U.S. stock
market may have weakened seasonal demand from municipal bond coupon payments and
redemptions; and 3) the specter of tax reform throughout 1995 increased investor
concerns over the tax-free advantage of municipal income, which could be reduced
by tax reform  exempting all investment  income from taxation.  During the first
quarter  of  1996,  however,   municipals   outperformed  taxable  fixed  income
securities as the probability of impending tax reform  decreased  significantly,
thereby  increasing  demand from both retail investors and institutions  such as
property & casualty insurance companies.

    Positive supply and demand technical  conditions provided for the California
municipal bond market's  outperformance  of the national  market during the past
six months.  Below-average  new issue  supply,  coupled  with the maturity of $4
billion in


                                       2
<PAGE>

California state warrants and seasonal coupon  payments,  provided strong demand
for  California  municipals.  We remain  positive  on the  California  municipal
market's  performance  for the  remainder  of the  year,  as the  state  economy
continues to show positive signs of growth.

    BlackRock  believes that  municipal  bonds have the potential to continue to
outperform  Treasury  securities  for the remainder of 1996.  The recent rise in
interest  rates  has  put  a  substantial  new  issuance  calendar  on  hold  as
municipalities  wait for interest rates to come down,  creating favorable supply
and demand conditions.  Additionally,  the decreased  probability of significant
tax reform being enacted should  continue to attract  investors to the municipal
bond market.

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. During the first four months of 1996, the steepening of the
municipal yield curve, a result of longer maturity  municipal bond yields rising
significantly while shorter maturities did not, widened the yield spread between
short and long  municipals  and  resulted in more  profitable  leverage  for the
Trust.

    Since the third quarter of 1995,  the Trust has been favoring 10- to 20-year
callable premium coupon bonds over par bonds and non-callable alternatives.  Due
to their defensive structure,  premium bonds  characteristically  outperform par
bonds in a rising  interest rate  environment.  As  anticipated,  premium coupon
bonds  posted  significant  outperformance  relative  to par bonds as rates rose
between  February  and April.  The Trust has  maintained  its emphasis on higher
credit quality,  consistently  holding over half of its assets in  AAA/AAA-rated
bonds. In order to pick up additional  yield, the balance of the portfolio has a
concentration  in A/BBB rated bonds,  which generally offer a substantial  yield
spread  over AAA  municipals.  As the  yield  advantage  of owning  A/BBB  bonds
narrows,  the Trust expects to scale back its weighting and increase  allocation
to higher credit bonds.

    The following  charts compare the Trust's current and October 31, 1995 asset
composition and credit quality allocations:


                                Sector Breakdown
- --------------------------------------------------------------------------------
       Sector                   April 30, 1996               October 31, 1995
- --------------------------------------------------------------------------------
  Lease                              19%                           10%
- --------------------------------------------------------------------------------
  Power                              19%                           23%
- --------------------------------------------------------------------------------
  City, County & State               14%                            9%
- --------------------------------------------------------------------------------
  Transportation                     13%                           16%
- --------------------------------------------------------------------------------
  University                         10%                           10%
- --------------------------------------------------------------------------------
  Housing                            10%                           10%
- --------------------------------------------------------------------------------
  Miscellaneous Revenue               5%                            9%
- --------------------------------------------------------------------------------
  Water & Sewer                       5%                            9%
- --------------------------------------------------------------------------------
  Utility                             5%                            -
- --------------------------------------------------------------------------------
  Hospital                            -                             2%
- --------------------------------------------------------------------------------
  Pollution Control                   -                             2%
- --------------------------------------------------------------------------------


                                       3
<PAGE>

- --------------------------------------------------------------------------------
     Standard & Poor's/Moody's
          Credit Rating            April 30, 1996      October 31, 1995
- --------------------------------------------------------------------------------
          AAA/Aaa                       38%                   41%
- --------------------------------------------------------------------------------
           AA/Aa                        15%                   14%
- --------------------------------------------------------------------------------
            A/A                         35%                   38%
- --------------------------------------------------------------------------------
          BBB/Baa                       12%                    7%
- --------------------------------------------------------------------------------

        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,



Robert Kapito                            Kevin Klingert
Vice Chairman and                        Managing Director and  
Portfolio Manager                        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 4/30/96:                             $12.375
- --------------------------------------------------------------------------------
Net Asset Value as of 4/30/96:                                 $13.59
- --------------------------------------------------------------------------------
Yield on Closing Stock Price as of 4/30/96 ($12.375)1:          6.36%
- --------------------------------------------------------------------------------
Current Monthly Distribution per Share2:                       $0.0656
- --------------------------------------------------------------------------------
Current Annualized Distribution per Share2:                    $0.7872
- --------------------------------------------------------------------------------

1Yield on Closing Stock Price is  calculated by dividing the current  annualized
 distribution per share by the closing stock price per share.

2The distribution is not constant and is subject to change.


                                       4
<PAGE>

<TABLE>
- -----------------------------------------------------------------------------------------------------------------------------
The BlackRock California Investment
Quality Municipal Trust Inc.
Portfolio of Investments
April 30, 1996
(Unaudited)
- -----------------------------------------------------------------------------------------------------------------------------
<CAPTION>
         Principal                                                                                Option          
          Amount                                                                                   Call              Value
Rating*   (000)                                Description                                      Provisions+        (Note 1)    
- -----------------------------------------------------------------------------------------------------------------------------
<S>      <C>      <C>                                                                           <C>                <C>   
                  LONG-TERM INVESTMENTS-153.4%
A        $1,000   California St., G.O., 5.75%, 3/01/19 ......................................    3/05 at 101       $  965,330
                  California St. Hsg. Fin. Agcy. Rev., Home Mtge.,
A           995     Ser. B-1, 6.45%, 2/01/11 ................................................    8/04 at 102        1,004,273
AA-       1,000     Ser. G, 7.20%, 8/01/14 ..................................................    8/04 at 102        1,045,310
                  California St. Pub. Wks. Brd. Lease Rev.,
AAA       1,000     Dept. of Corrections, Ser. B, 5.375%, 12/01/19, MBIA ....................   12/03 at 102          921,550
A-        1,000     Dept. of Corrections, Ser. A, 6.875%, 11/01/14 ..........................   11/04 at 102        1,077,470
A-        1,000     St. Univ. Proj., Ser. A, 6.10%, 10/01/06 ................................   10/04 at 102        1,062,070
AAA       1,000     St. Univ. Proj., Ser. A, 6.40%, 12/01/16, AMBAC .........................   12/02 at 102        1,042,900
BBB-      1,385   Foothill/Eastern Trans. Agcy., Ser. A, Zero Coupon, 1/01/04 ...............   No Opt. Call          859,393
AA        1,150   Los Angeles Harbor Dept. Rev., Ser. B, 6.00%, 8/01/13 .....................    8/06 at 101        1,142,329
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          981,810
A         1,000   MSR Pub. Pwr. Agcy., San Juan Proj., Ser. C, 6.875%, 7/01/19 ..............    1/97 at 102        1,018,410
BBB-      1,000   Sacramento Pwr. Auth. Cogeneration Proj. Rev., 6.50%, 7/01/09 .............    7/06 at 102        1,013,750
AAA       1,000   Sacramento Utility Dist. Elec. Rev., Ser. E, 5.70%, 5/15/12, MBIA .........    5/03 at 102          984,270
AAA       1,000   San Diego Ind. Dev. Rev., Ser. A, 5.90%, 6/01/18, AMBAC ...................    6/03 at 102          987,730
                  San Francisco City & Cnty.,
AAA       1,000     Arpt. Comn. Rev., Intl. Arpt., Ser. 6, 6.125%, 5/01/09, AMBAC ...........    5/04 at 102        1,032,320
AAA       1,000   Sewer Rev., Ser. A, 5.95%, 10/01/25, FGIC .................................   10/03 at 102          993,180
BBB         750     San Joaquin Hills Trans. Corridor Agcy., Toll Rd. Rev., 6.75%, 1/01/32 ..    1/03 at 102          764,783
                  Southern California Pub. Pwr. Auth. Transm. Proj. Rev.,
AAA       1,000     5.50%, 7/01/20, MBIA ....................................................    7/02 at 100          924,510
A+        1,000     6.125%, 7/01/18 .........................................................    7/02 at 102          998,040
                  Univ. of California Rev.,
AAA       1,000     Ser. D, 6.10%, 9/01/10, MBIA ............................................    9/02 at 102        1,029,560
A-        1,135     Ser. B, 6.30%, 9/01/13 ..................................................    9/03 at 102        1,143,183
                                                                                                                  -----------
                  Total long-term investments (cost $20,561,102) ............................                      20,992,171
                                                                                                                  -----------

                  Total Investments-153.4% (cost $20,561,102) ...............................                      20,992,171
                  Other assets in excess of liabilities-1.4% ................................                         191,448
                  Liquidation value of preferred stock-(54.8)% ..............................                      (7,500,000)
                                                                                                                  -----------
                  Net Assets Applicable to Common Shareholders-100% .........................                     $13,683,619
                                                                                                                  ===========
<FN>
- ----------
*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.
</FN>
</TABLE>

<TABLE>
- -----------------------------------------------------------------------------------------------------------------
                                      Key to Abbreviations
<S>       <C>                                                  <C>      <C>   

 AMBAC    -American Municipal Bond Assurance Corporation       G.O.     -General Obligation Bond 
 FGIC     -Financial Guaranty Insurance Company                MBIA     -Municipal Bond Insurance Association
- -----------------------------------------------------------------------------------------------------------------
</TABLE>

                       See Notes to Financial Statements.

                                       5

<PAGE>

Left Col.

- --------------------------------------------------------------------------------
The BlackRock California Investment
Quality Municipal Trust Inc.
Statement of Assets and Liabilities
April 30, 1996
(Unaudited)
- --------------------------------------------------------------------------------
Assets

Investments, at value (cost $20,561,102) (Note 1) ...............   $20,992,171
Receivable for investments sold .................................       955,786
Interest receivable .............................................       357,058
Deferred organization expenses and other assets .................         6,406
                                                                    -----------
                                                                     22,311,421
                                                                    -----------

Liabilities
Bank overdraft ..................................................        70,114
Payable for investments purchased ...............................     1,014,783
Advisory fee payable (Note 2) ...................................         5,918
Dividends payable-preferred stock ...............................         4,500
Dividends payable-common stock ..................................         3,525
Administration fee payable (Note 2) .............................         1,691
Other accrued expenses ..........................................        27,271
                                                                    -----------
                                                                      1,127,802
                                                                    -----------

Net Investment Assets ...........................................   $21,183,619
                                                                    ===========
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 ...........................       171,104
  Accumulated net realized loss .................................      (825,728)
  Net unrealized appreciation ...................................       431,069
                                                                    -----------
  Net investment assets, April 30, 1996 .........................   $21,183,619
                                                                    ===========
Net assets applicable to common shareholders ....................   $13,683,619
                                                                    ===========

Net asset value per share:
  ($13,683,619 + 1,007,093 shares of common
  stock issued and outstanding) .................................        $13.59
                                                                         ======


Right Col.

- --------------------------------------------------------------------------------
The BlackRock California Investment
Quality Municipal Trust Inc.
Statement of Operations
Six Months Ended April 30, 1996
(Unaudited)
- --------------------------------------------------------------------------------

Net Investment Income

Income
  Interest and discount earned ...................................    $ 640,755
                                                                      ---------
Expenses
  Investment advisory ............................................       37,962
  Auction agent ..................................................       16,000
  Administration .................................................       10,846
  Reports to shareholders ........................................        7,500
  Directors ......................................................        6,000
  Transfer agent .................................................        5,000
  Audit ..........................................................        5,000
  Legal ..........................................................        1,000
  Custodian ......................................................          500
  Miscellaneous ..................................................       13,986
                                                                      ---------
  Total expenses .................................................      103,794
                                                                      ---------
Net investment income ............................................      536,961
                                                                      ---------

Realized and Unrealized Gain (Loss)
on Investments (Note 3)

Net realized gain on investments .................................       22,054
Net change in unrealized appreciation depreciation
  on investments .................................................     (289,825)
                                                                      ---------
Net loss on investments ..........................................     (267,771)
                                                                      ---------

Net Increase In Net Investment
Assets Resulting from Operations                                      $ 269,190
                                                                      =========



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, 1996         October 31, 1995
                                                                             --------------         ----------------
<S>                                                                             <C>                   <C>
Operations:

  Net investment income .....................................................   $  536,961            $ 1,062,204

  Net realized gain on investments ..........................................       22,054                156,926

  Net change in unrealized appreciation (depreciation) on investments .......     (289,825)             1,963,267
                                                                                -----------            -----------

  Net increase in net investment assets resulting from operations ...........      269,190              3,182,397

Dividends and distributions:
 
  To common shareholders from net investment income .........................     (382,270)              (792,752)

  To preferred shareholders from net investment income ......................     (129,998)              (269,472)

  To common shareholders in excess of net realized gains on investments .....      (14,099)                   -

  To preferred shareholders in excess of net realized gains on investments ..       (4,883)                   -
                                                                                -----------            -----------
    Total increase (decrease) ...............................................     (262,060)             2,120,173


Net Investment Assets

Beginning of period .........................................................    21,445,679             19,325,506
                                                                                -----------            -----------
End of period ...............................................................   $21,183,619            $21,445,679
                                                                                ===========            ===========
</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, 1996    1995         1994    October 31, 1993
                                                                           --------------    ----         ----    ----------------
<S>                                                                           <C>          <C>          <C>          <C>

Net asset value, beginning of period ......................................   $  13.85     $  11.74     $  14.73     $  14.10
                                                                              --------     --------     --------     --------
  Net investment income ...................................................        .53         1.05         1.04          .31
  Net realized and unrealized gain (loss) on investments ..................       (.27)        2.12        (3.01)         .83
                                                                              --------     --------     --------     --------
Net increase (decrease) from investment operations ........................        .26         3.17        (1.97)        1.14
                                                                              --------     --------     --------     --------
Dividends and Distributions:
  Dividends from net investment income to: 
    Common shareholders ...................................................       (.38)        (.79)        (.79)        (.20)
    Preferred shareholders ................................................       (.13)        (.27)        (.18)        (.04)
                                                                              --------     --------     --------     --------
  Distributions in excess of net realized gains on investments:
    Common shareholders ...................................................       (.01)          -            -            -
    Preferred shareholders ................................................        -***          -            -            -
                                                                              --------     --------     --------     --------
  Distributions from capital gains to:
    Common shareholders ...................................................        -             -          (.03)          -
    Preferred shareholders ................................................        -             -          (.01)          -
                                                                              --------     --------     --------     --------
  Total dividends and distributions .......................................       (.52)       (1.06)       (1.01)        (.24)  
                                                                              --------     --------     --------     --------
Capital charge with respect to issuance of common and preferred stock .....        -             -          (.01)        (.27)
                                                                              --------     --------     --------     --------
Net asset value, end of period** ..........................................   $  13.59     $  13.85     $  11.74     $  14.73#
                                                                              ========     ========     ========     ======== 
Per share market value, end of period** ...................................   $ 12.375     $ 12.625     $ 10.625     $  14.00
                                                                              ========     ========     ========     ========
TOTAL INVESTMENT RETURN+: .................................................      1.06%       26.86%     (18.85)%         .68%
RATIOS TO AVERAGE NET ASSETS OF COMMON SHAREHOLDERS++:
Expenses ..................................................................      1.48%+++     1.52%        1.25%        1.07%+++
Net investment income .....................................................      7.64%+++     8.24%        7.81%        5.31%+++

SUPPLEMENTAL DATA:
Average net assets of common shareholders (in thousands) ..................   $ 14,141     $ 12,892     $ 13,362     $ 14,504
Portfolio turnover rate ...................................................        51%         149%         184%          13%
Net assets of common shareholders, end of period (in thousands) ...........   $ 13,684     $ 13,946     $ 11,826     $ 14,836
Asset coverage per share of preferred stock, end of period ................   $ 70,612     $ 71,485     $128,837     $148,910
Preferred stock outstanding (in thousands) ................................   $  7,500     $  7,500     $  7,500     $  7,500
<FN>
- -----------------
  *Commencement of investment operations.
 **Net asset value and market  value are  published  in The Wall Street  Journal
   each Monday.
***Actual amount paid to preferred shareholder was $0.00 per common share.
  #Netasset value immediately after the closing of the first public offering was
   $14.01.
  +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 and expenses  applicable to both
   the  common  and  preferred  shares  relative  to  the  average net assets of 
   common shareholders.  Ratios do not reflect the effect of  dividend  payments
   to preferred shareholders.
+++Annualized.

   The information  above represents the unaudited  operating  performance for a
   share of common stock outstanding, total investment return, ratios to average
   net  assets  and  other  supplemental  data for the  period  indicated.  This
   information has been determined based upon financial  information provided in
   the financial statements and market value data for the Trust's common stock.
</FN>
</TABLE>

                       See Notes to Financial Statements.

                                       8


<PAGE>

Left Col.
- --------------------------------------------------------------------------------
The BlackRock California Investment
Quality Municipal Trust Inc.
Notes to Financial Statements
(Unaudited)
- --------------------------------------------------------------------------------

Note 1. 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 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.

Option  Selling/Purchasing:  When the Trust  sells or  purchases  an option,  an
amount  equal to the  premium  received  or paid by the Trust is  recorded  as a
liability or an asset and is

  
Right Col.

subsequently  adjusted  to the  current  market  value of the option  written or
purchased.  Premiums  received or paid from writing or purchasing  options which
expire  unexercised  are treated by the Trust on the expiration date as realized
gains or losses.  The  difference  between  the  premium  and the amount paid or
received  on  effecting  a  closing  purchase  or  sale  transaction,  including
brokerage commissions,  is also treated as a realized gain or loss. If an option
is  exercised,  the premium paid or received is added to the  proceeds  from the
sale or cost of the  purchase in  determining  whether the Trust has  realized a
gain or a loss on investment  transactions.  The Trust,  as writer of an option,
may have no control over whether the underlying securities may be sold (call) or
purchased  (put) and as a result bears the market risk of an unfavorable  change
in the price of the security underlying the written option.

Financial  Futures  Contracts:  A futures  contract is an agreement  between two
parties to buy and sell a financial instrument for a set price on a future date.
Initial margin deposits are made upon entering into futures contracts and can be
either  cash or  securities.  During the period the  futures  contract  is open,
changes in the value of the  contract  are  recognized  as  unrealized  gains or
losses by  "marking-to-market"  on a daily basis to reflect the market  value of
the contract at the end of each day's  trading.  Variation  margin  payments are
made or  received,  depending  upon  whether  unrealized  gains  or  losses  are
incurred. When the contract is closed, the Trust records a realized gain or loss
equal to the  difference  between  the  proceeds  from (or cost of) the  closing
transaction and the Trust's basis in the contract.

  Financial  futures  contracts,  when used by the Trust,  help in maintaining a
targeted duration.  Duration is a measure of the price sensitivity of a security
or a portfolio to relative changes in interest rates.  For instance,  a duration
of "one" means that a  portfolio's  or a  security's  price would be expected to
change by approximately one percent with a one percent change in interest rates,
while a duration of "five"  would imply that the price would move  approximately
five  percent in  relation to a one percent  change in interest  rates.  Futures
contracts  can be sold to  effectively  shorten  an  otherwise  longer  duration
portfolio.  In the same sense,  futures contracts can be purchased to lengthen a
portfolio that is shorter than its duration  target.  Thus, by buying or selling
futures contracts,  the Trust can effectively "hedge" more volatile positions so
that  changes in  interest  rates do not change the  duration  of the  portfolio
unexpectedly.

  The Trust may invest in financial futures contracts  primarily for the purpose
of hedging its existing portfolio securities or

                                       9


<PAGE>

securities the Trust intends to purchase against fluctuations in value caused by
changes  in  prevailing  market  interest  rates.  Should  interest  rates  move
unexpectedly,  the  Trust  may  not  achieve  the  anticipated  benefits  of the
financial  futures  contracts  and  may  realize  a  loss.  The  use of  futures
transactions  involves  the risk of  imperfect  correlation  in movements in the
price of futures contracts, interest rates and the underlying hedged assets. The
Trust is also at risk of not being able to enter into a closing  transaction for
the futures contract because of an illiquid secondary market. In addition, since
futures are used to shorten or lengthen a portfolio's duration,  there is a risk
that the portfolio may have  temporarily  performed  better without the hedge or
that the Trust may lose the  opportunity to realize  appreciation  in the market
price of underlying positions.

Short Sales: The Trust may make short sales of securities as a method of hedging
potential  price declines in similar  securities  owned.  When the Trust makes a
short  sale,  it may  borrow  the  security  sold  short and  deliver  it to the
broker-dealer  through  which  it made  the  short  sale as  collateral  for its
obligation  to deliver the security upon  conclusion of the sale.  The Trust may
have to pay a fee to borrow the  particular  securities  and may be obligated to
pay over any payments received on such borrowed  securities.  A gain, limited to
the price at which the Trust sold the security short, or a loss, unlimited as to
dollar amount,  will be recognized  upon the  termination of a short sale if the
market price is greater or less than the proceeds originally received.

Securities  Transactions  and Investment  Income:  Securities  transactions  are
recorded  on the trade  date.  Realized  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.



Right Col.
          
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. 

Reclassification  of  Capital  Accounts:  The Trust  accounts  and  reports  for
permanent differences between financial and tax reporting in accordance with the
American Institute of Certified Public Accountants' Statement of Position, 93-2:
Determination,  Disclosure  and  Financial  Statement  Presentation  of  Income,
Capital Gain and Return of Capital  Distributions by Investment  Companies.  The
effect of adopting the  statement for the six months ended April 30, 1996 was to
increase accumulated net realized loss and increase undistributed net investment
income by $3,486.  Net investment income, net realized gains and net assets were
not affected by this change.

Note 2. Agreements

The  Trust  has  an  Investment  Advisory  Agreement  with  the  Adviser  and an
Administration  Agreement with Prudential Mutual Fund Management,  Inc. ("PMF"),
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 paid to PMF 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.  PMF pays occupancy and certain clerical and
accounting costs of the Trust. The Trust bears all other costs and expenses.

  On February 28, 1995, the advisor was acquired by PNC Bank,  N.A. As a result,
the  Adviser is a  wholly-owned  corporate  subsidiary  of PNC Asset  Management
Group, Inc., the holding company for PNC's asset management businesses.

Note 3. Portfolio
Securities

Purchases and sales of investment securities, other than short-term investments,
for the period  ended April 30, 1996  aggregated  $11,294,819  and  $10,943,935,
respectively.

                                       10


<PAGE>


  The federal income tax basis of the Trust's  investments at April 30, 1996 was
substantially  the same as the basis for financial  reporting and,  accordingly,
net unrealized appreciation for federal income tax purposes, was $431,069 (gross
unrealized appreciation-$516,577; gross unrealized depreciation-$85,508).

  For federal income tax purposes,  the Trust had a capital loss carryforward at
October  31, 1995 of  approximately  $848,000  which will  expire in 2002.  Such
carryforward  amount  is after  realization  of  approximately  $134,000  in net
taxable  gains  recognized  during  the  fiscal  year ended  October  31,  1995.
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, 1996, the Adviser owned 7,093 shares.
As of April  30,  1996  there  were 300  shares  at  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 4.99%
during the period ended April 30, 1996.



Right Col.

  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, 1996,  the Board of  Directors of the Trust  declared a
dividend from undistributed earnings of $0.0656 per common share payable May 31,
1996 to shareholders of record on May 15, 1996.

  For the period May 1, 1996 to May 31,  1996,  dividends  declared on Preferred
Stock totalled $22,684 in aggregate for the outstanding Preferred Stock.

                                       11


<PAGE>


Note 6. Quarterly Data

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                                                                Net increase/   
                                             Net realized and   decrease in
                                                unrealized     net investment             Dividends
                              Net investment gains (losses) on assets resulting Common shares Preferred shares*
                                 income         investments    from operations                                              Period
                                       Per              Per             Per              Per           Per   Share price of   end
    Quarterly         Total          Common           Common          Common           Common        Common   Common stock net asset
     period           income  Amount  share   Amount   share  Amount   share   Amount   share  Amount share    High    Low   value
    ---------         ------  -------------   --------------  --------------   --------------  ------------  -------------- --------
<S>                  <C>      <C>      <C>   <C>        <C>   <C>        <C>   <C>       <C>   <C>     <C>  <C>     <C>      <C>
May 1, 1994
to July 31, 1994     $302,866 $260,859 $.26  $ 377,218 $ .37  $ 638,077  $ .63 $198,193  $.20  $48,416 $.05 $12     $11 1/4  $12.97

August 1, 1994
to October 31, 1994   307,462  263,751  .26 (1,232,502) 1.22)  (968,751)  (.96) 198,190   .20   54,767  .05  11 3/4   9 7/8   11.74

November 1, 1994
to January 31, 1995   314,677  272,661  .27    505,599   .50    778,260    .77  198,190   .19    68,381 .07  11 1/2  10 1/4   12.25

February 1, 1995
to April 30, 1995     312,600  264,234  .26    708,162   .71    972,396    .97  198,196   .20    67,596 .07  12 1/2  11 3/8   12.95

May 1, 1995
to July 31, 1995      313,879  264,454  .26    190,799   .19    455,253    .45  198,180   .20    70,985 .07  12 3/4  12       13.14

August 1, 1995
to October 31, 1995   316,413  260,855  .26    715,633   .72    976,488    .98  198,186   .20    62,510 .06  12 7/8  12 1/8   13.85

November 1, 1995
to January 31, 1996    19,850  267,498  .26    547,277   .54    814,775    .80  198,192   .20    71,425 .07  13 1/4  12 1/2   14.39

February 1, 1996
to April 30, 1996     320,905  269,463  .27   (815,048) (.81)   545,585)  (.54) 198,177   .19    63,456 .06  13 1/8  12 3/8   13.59
- ------------------------------------------------------------------------------------------------------------------------------------
<FN>
*For the six months  ended April 30, 1996 the  average  annualized  rate paid to preferred shareholders was 3.62%.
</FN>
</TABLE>
 
                                       12





<PAGE>

- --------------------------------------------------------------------------------
        THE BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST INC.
                             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 May 8, 1996 to vote on the
following matters:

    (1) To elect the following two Directors to serve as follows:

        Director                                 Class      Term      Expiring
                                                 -----      ----      --------
        Frank J. Fabozzi* .....................   II       3 years       1999
        Ralph L. Schlosstein ..................   II       3 years       1999
        *Represents the preferred shareholders.

Directors  whose term of office  continues  beyond  this  meeting  are Andrew F.
Brimmer,  Richard E. Cavanagh,  Kent Dixon, Laurence D. Fink, James Grosfeld and
James Clayburn LaForce, Jr.

    (2) To ratify the selection of Deloitte & Touche LLP as  independent  public
        accountants of the Trust for the fiscal year ending October31, 1996.


Shareholders  elected the two 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>               

         Frank J. Fabozzi ......................       286           -                    -
         Ralph L. Schlosstein ..................
         
         Ratification of Deloitte & Touche LLP .   746,578         3,333                 3,220

</TABLE>


- --------------------------------------------------------------------------------
                           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 Boston EquiServe (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 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.

    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.


                                       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  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 $41
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 eitherthe New York or American Stock
Exchanges,  several  open-end  funds and over 80 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  nation's
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,  Boston
Financial  Data  Services.  Investors  who wish to hold  shares  in a  brokerage
account  should check with their  financial  advisor to determine  whether their
brokerage firm offers dividend reinvestment services.

Leverage Considerations in 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 

                                       14


<PAGE>

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.



                                       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 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.







                                       16


<PAGE>


- --------------------------------------------------------------------------------
                      BLACKROCK FINANCIAL MANAGEMENT, INC.
                           SUMMARY OF CLOSED-END FUNDS
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>

Taxable Trusts
- ---------------------------------------------------------------------------------------------------------
                                                                              Stock             Maturity
Perpetual Trusts                                                              Symbol             Date
                                                                              ------            --------  
<S>                                                                            <C>               <C>

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


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

</TABLE>

                     If you would like further information
                 please call BlackRock at (800) 227-7BFM (7236)
                     or consult with your financial advisor.



                                       17

<PAGE>

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

    BlackRock  Financial  Management  (BlackRock)  is  a  registered  investment
adviser which specializes in managing high quality fixed income securities, both
taxable and tax exempt.  BlackRock  currently manages over $41 billion of assets
across the government,  mortgage,  corporate and municipal sectors. These assets
are managed on behalf of many  individual  investors  in  twenty-one  closed-end
funds  traded on either the New York or American  stock  exchanges,  and several
open-end funds and on behalf of more than 80 institutional clients in the United
States and overseas.  BlackRock's  institutional investor base includes Chrysler
Corporation  Master Retirement Trust,  General  Retirement System of the City of
Detroit,  State Treasurer of Florida,  Ford Motor Company Pension Plan,  General
Electric Pension Trust and Unisys Corporation Master Trust.

    BlackRock was formed in April 1988 by fixed income  professionals who sought
to create  an asset  management  firm  specializing  in  managing  fixed  income
securities for individuals and  institutional  investors.  The  professionals at
BlackRock have extensive experience creating, analyzing and trading a variety of
fixed income instruments,  including the most complex structured securities.  In
fact, individuals at BlackRock are responsible for many of the major innovations
in the  mortgage-backed  and  asset-backed  securities  markets,  including  the
creation of the CMO, the floating rate CMO, the senior/subordinated pass-through
and the multi-class asset-backed security.

    BlackRock  is  unique  among  asset  management  and  advisory  firms in the
significant  emphasis it places on the  development  of  proprietary  analytical
capabilities.  A quarter of the professionals at BlackRock work full-time in the
design,  maintenance  and use of such systems  which are otherwise not generally
available to investors.  BlackRock's  proprietary  analytical tools are used for
evaluating,  investing in and designing investment  strategies and portfolios of
fixed  income  securities,   including  mortgage   securities,   corporate  debt
securities or tax-exempt securities and a variety of hedging instruments.

    BlackRock  has  developed  investment  products  which respond to investors'
needs and has been  responsible  for several  major  innovations  in  closed-end
funds.  BlackRock  introduced  the first  closed-end  mortgage  fund,  the first
taxable  and  tax-exempt  closed-end  funds to offer a finite  term,  the  first
closed-end  fund to achieve a AAAf  rating by  Standard & Poor's,  and the first
closed-end  fund to invest  primarily in North American  Government  securities.
BlackRock's  closed-end funds currently have dividend  reinvestment  plans which
are  designed  to  provide  an  ongoing  source of  demand  for the stock in the
secondary market. BlackRock manages a ladder of alternative investment vehicles,
with each fund having specific investment objectives and policies.

    In view of our  continued  desire to  provide a high level of service to all
our shareholders, BlackRock maintains a toll-free number for your questions. The
number is (800) 227-7BFM (7236).  We encourage you to call us with any questions
you may have about your  BlackRock  funds and thank you for the continued  trust
you place in our abilities.



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

                                       18




<PAGE>

Left Col.



BlackRock



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

Officers
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 Mutual Fund Management, Inc.
One Seaport Plaza
New York, NY 10292

Custodian
State Street Bank and Trust Company
One Heritage Drive
North  Quincy,  MA 02171

Transfer Agent
Boston EquiServe L.P.
150 Royall Street
Canton, MA 02021
(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
919 Third Avenue
New York, NY 10022

  The  accompanying  financial  statements as of 
April 30, 1996 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 Mutual Fund Management, Inc.
                                   32nd Floor
                                One Seaport Plaza
                               New York, NY 10292
                                 (800) 227-7BFM
                                                                   09247U-10-7
                                                                   09247U-20-6


Right Col.

The BlackRock
California
Investment Quality
Municipal Trust Inc.
- ---------------------------------------
Semi-Annual Report
April 30, 1996



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