BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 1998-07-01
Previous: JP MORGAN FUNDS, N-30D, 1998-07-01
Next: CHANCELLOR MEDIA CORP/, 424B3, 1998-07-01



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



                                                                    May 31, 1998

Dear Shareholder:

      Domestic  bonds  provided  investors  with modest total returns during the
past six months,  as interest rates generally  fell.  Supporting the bond market
was favorable inflation news and the belief that the Federal Reserve is unlikely
to raise short-term interest rates in the immediate future.

      U.S.  economic  growth has remained  relatively  robust,  spurred by lower
interest rates and strong consumer  demand.  However,  the economic  weakness of
Asia looms large.  While the fallout from the Asian fiscal  crisis  probably has
yet to  materialize  in the U.S., we expect a "slowdown" in Asia's  economies to
slow U.S.  growth in 1998.  While we expect that  interest  rates will be fairly
stable in the  near-term,  our  longer-term  outlook for the bond market remains
optimistic,  based on the fundamentally  favorable backdrop of low inflation,  a
currently high level of real yields, and declining Treasury borrowing.

      As you may know, the five investment  management  firms that comprised the
PNC Asset Management  Group have  consolidated  under BlackRock,  resulting in a
$118  billion  money  management  firm.  We look  forward  to using  our  global
investment management expertise to present exciting investment  opportunities to
closed-end fund shareholders in the future.

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

Sincerely,



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



                                       1


<PAGE>
                                                                    May 31, 1998



Dear Shareholder:

      We are  pleased  to  present  the  semi-annual  report  for The  BlackRock
Investment  Quality  Municipal Trust Inc. ("the Trust") for the six months ended
April 30,  1998.  We would like to take this  opportunity  to review the Trust's
stock price and net asset value (NAV) performance, summarize developments in the
fixed income markets and discuss recent portfolio management activity.

      The Trust is a diversified,  actively  managed  closed-end bond fund whose
shares are traded on the New York Stock  Exchange  under the symbol  "BKN".  The
Trust's  investment  objective is to provide high current  income that is exempt
from regular Federal income tax consistent with the preservation of capital. The
Trust seeks to achieve its  objective by investing  in  investment  grade (rated
"AAA" to "BBB" by a major rating  agency or of  equivalent  quality)  tax-exempt
general   obligation  and  revenue  bonds  issued  by  city,  county  and  state
municipalities throughout the United States.

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

<TABLE>
<CAPTION>
                             ------------------------------------------------------------------------
                                 4/30/98      10/31/97        CHANGE          HIGH           LOW
- -----------------------------------------------------------------------------------------------------
<S>                             <C>            <C>            <C>           <C>            <C>     
  STOCK PRICE                   $13.8125       $13.375        3.27%         $14.4375       $13.3125
- -----------------------------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)         $15.21         $15.32        (0.72)%        $15.68         $15.21
- -----------------------------------------------------------------------------------------------------
</TABLE>

      Additionally, on June 1, 1998, the Trust's Board of Directors announced an
increase  in the  Trust's  monthly  dividend  effective  with the July 31,  1998
payment.  The new dividend rate was increased from $0.065625 to $0.0719 monthly,
or from $0.7875 to $0.8625 annually.

THE FIXED INCOME MARKETS

      The first four months of 1998 have witnessed  continued rapid expansion of
the U.S.  economy.  GDP  growth  is  estimated  at an annual  rate of 4.2%,  far
exceeding  the  historical  non-inflationary  level of 2%.  Despite  the  strong
economic growth,  inflation stayed surprisingly subdued.  After rising only 1.7%
in 1997,  inflation inched higher at a 0.2% annual rate for the first quarter of
1998.  One  explanation  for the absence of inflation in the U.S.  economy stems
from the aftermath of the Asian crisis. U.S. exports to Asia have slowed,  while
the strength of the dollar caused cheaper Asian imports to flood the U.S. market
and exert downward price pressure on domestic goods.

      The Treasury  market  rallied  during the fourth  quarter of 1997 and into
1998  before  giving  back  some  gains  during  the  past few  months.  For the
semi-annual  period,  the yield of the 10-year Treasury security fell from 5.83%
on October 31, 1997 to 5.67% on April 30, 1998.  The strong  performance  of the
Treasury market was in response to moderating economic growth, low inflation and
a "flight to  quality"  from  investors  seeking a safe  haven in U.S.  Treasury
securities.  Continued  expectations  that the Asian  crisis will slow  economic
growth  and force the Fed to leave the  Federal  funds rate  unchanged  provided
additional  support  to the bond  market.  With  Treasury  supply  waning due to
surplus in the federal budget and increased foreign demand for Treasuries due to
their U.S. government backing and relatively  attractive yields, we anticipate a
positive environment for Treasuries for the balance of 1998.

      Municipal bonds underperformed the taxable domestic bond market during the
past six months,  returning  2.77% (as measured by the Lehman  Municipal  Index)
versus the Lehman  Aggregate  Index's 3.58% on a pre-tax basis.  The main forces
behind  municipal bond  underperformance  were  increased  municipal bond supply
(fueled  by the  lowest  municipal  interest  rates  since the 1960s) and retail
investors  focus  on  the  equity  markets.   We  believe  that  municipals  are
attractively  valued versus Treasuries and our outlook for municipal  securities
is favorable.  The robust economy  continues to strengthen the credit quality of
most  issuers,  and we expect  that the  attractive  taxable  equivalent  yields
offered by municipal securities should bring investors back into the market.



                                       2
<PAGE>

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

      The Trust's portfolio is actively managed to diversify exposure to various
sectors,  issuers,  revenue sources and security types.  BlackRock's  investment
strategy  emphasizes  a  relative  value  approach,  which  allows  the Trust to
capitalize  upon  changing  market  conditions  by rotating  municipal  sectors,
credits and coupons.

      Additionally,  the  Trust  employs  leverage  to  enhance  its  income  by
borrowing at  short-term  municipal  rates and  investing the proceeds in longer
maturity  issues  that have  higher  yields.  The  degree to which the Trust can
benefit  from its use of  leverage  may affect its  ability to pay high  monthly
income.  At the end of the semi-annual  period,  the Trust's leverage amount was
34% of total assets.  During the past six months,  the Trust's  borrowing  costs
have remained favorable.

      Within the municipal  market, we find the best relative value on the yield
curve to be in the 14 to 17 year  sector of the yield  curve,  which we  believe
offers the most  attractive  taxable  equivalent  yields for the least amount of
incremental duration.  Additionally, the Trust has been emphasizing higher rated
credits (AA- and AAA-rated  issues) over lower rated credits (BBB and A) to take
advantage of  historically  narrow credit spreads between higher and lower rated
bonds.

      The  following  charts  compare the  Trust's  current and October 31, 1997
asset composition and credit quality allocations:

                                SECTOR BREAKDOWN

- --------------------------------------------------------------------------------
    SECTOR                             APRIL 30, 1998       OCTOBER 31, 1997
- --------------------------------------------------------------------------------
  City, County & State                        17%                  17%
- --------------------------------------------------------------------------------
  Transportation                              17%                  15%
- --------------------------------------------------------------------------------
  Hospital                                    14%                  11%
- --------------------------------------------------------------------------------
  Industrial                                  14%                   8%
- --------------------------------------------------------------------------------
  Power                                       11%                  13%
- --------------------------------------------------------------------------------
  University/School                            7%                   8%
- --------------------------------------------------------------------------------
  Lease Revenue                                6%                   8%
- --------------------------------------------------------------------------------
  Housing                                      6%                   5%
- --------------------------------------------------------------------------------
  Tax Revenue                                  4%                   4%
- --------------------------------------------------------------------------------
  Water & Sewer                                2%                   5%
- --------------------------------------------------------------------------------
  Resource Recovery                            1%                   1%
- --------------------------------------------------------------------------------
  Miscellaneous Revenue                        1%                   1%
- --------------------------------------------------------------------------------
  Pollution Control                            --                   4%
- --------------------------------------------------------------------------------


- --------------------------------------------------------------------------------
     STANDARD & POOR'S/MOODY'S
           CREDIT RATING               APRIL 30, 1998       OCTOBER 31, 1997
- --------------------------------------------------------------------------------
              AAA/Aaa                         57%                  55%
- --------------------------------------------------------------------------------
               AA/Aa                           7%                  12%
- --------------------------------------------------------------------------------
                A/A                           13%                  13%
- --------------------------------------------------------------------------------
              BBB/Baa                         23%                  20%
- --------------------------------------------------------------------------------







                                       3
<PAGE>

      We look  forward to  continuing  to manage  the Trust to benefit  from the
opportunities  available to investors in the investment grade municipal  market.
We  thank  you for your  investment  and  continued  interest  in The  BlackRock
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 INVESTMENT QUALITY MUNICIPAL TRUST INC.
- --------------------------------------------------------------------------------
Symbol on New York Stock Exchange:                               BKN
- --------------------------------------------------------------------------------
Initial Offering Date:                                    February 19, 1993
- --------------------------------------------------------------------------------
Closing Stock Price as of 4/30/98:                            $13.8125
- --------------------------------------------------------------------------------
Net Asset Value as of 4/30/98:                                 $15.21
- --------------------------------------------------------------------------------
Yield on Closing Stock Price as of 4/30/98 ($13.8125)1:         5.70%
- --------------------------------------------------------------------------------
Current Monthly Distribution per Share2:                      $0.065625
- --------------------------------------------------------------------------------
Current Annualized Distribution per Share2:                    $0.7875
- --------------------------------------------------------------------------------

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




                                       4
<PAGE>

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
THE BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 1998 (UNAUDITED)
- ---------------------------------------------------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                                           OPTION CALL        VALUE
  RATING*  (000)                              DESCRIPTION (a)                              PROVISIONS+      (NOTE 1)
- ---------------------------------------------------------------------------------------------------------------------------
<S>      <C>                                                                             <C>              <C>
                  LONG-TERM INVESTMENTS -- 148.6%
                  CALIFORNIA -- 15.1%
   AAA   $ 4,115  Antelope Valley, Healthcare Dist., Ser. A, 5.00%, 1/01/12, FSA ......   1/08 at 102     $ 4,085,413
   AA      1,220  California Hsg. Fin. Agcy. Rev., Home Mtg., Ser. C, 5.65%, 8/01/14 ..   2/04 at 102       1,250,671
   A1      5,770  California St. G.O.,  5.00%, 10/01/14 ...............................  10/07 at 101       5,661,120
   AAA    15,460  Los Angeles Cnty. Asset Leasing Corp. Rev., 5.95%, 2/01/07, AMBAC ...  No Opt. Call      17,028,726
   AA      2,500  Metropolitan Wtr. Dist. Southern California Waterworks Rev., 
                    Ser. A, 5.00%, 7/01/26 ............................................   1/08 at 101       2,380,600
                  University of California Rev., Research Fac., Ser. B,
   A+      2,000    6.10%, 9/01/03+++ .................................................           N/A       2,191,340
   A+      3,305    6.20%, 9/01/03+++ .................................................           N/A       3,636,723
   A+      2,000    6.25%, 9/01/03+++ .................................................           N/A       2,205,440
                                                                                                          -----------
                                                                                                           38,440,033
                                                                                                          -----------
                  COLORADO -- 13.1%
                  Arapahoe Cnty. Cap. Impvt. Hwy. Rev., Trust Fund, Ser. E,
   AAA     3,100    Zero Coupon, 8/31/04 ..............................................  No Opt. Call       2,325,341
                  Denver City & Cnty. Arpt. Rev.,
   Baa     1,120    Ser. C, 6.65%, 11/15/05 ...........................................  11/02 at 102       1,211,011
   Baa     3,000    Ser. C, 6.50%, 11/15/06 ...........................................  11/02 at 102       3,219,420
   Aaa     3,705    Ser. D, 7.00%, 11/15/01+++.                                                   N/A       4,016,516
   Baa1   14,085    Ser. D, 7.00%, 11/15/25 ...........................................  11/01 at 100      15,041,653
                  E-470 Pub. Hwy. Auth. Rev., Ser. B,
   AAA     3,000    Zero Coupon, 9/01/11, MBIA ........................................  No Opt. Call       1,545,990
   AAA    10,000    Zero Coupon, 9/01/18, MBIA ........................................  No Opt. Call       3,387,200
   AAA     2,250    6.90%, 8/31/05 +++ ................................................           N/A       2,632,230
                                                                                                          -----------
                                                                                                           33,379,361
                                                                                                          -----------
                  CONNECTICUT -- 3.7%
   Aa3     8,750  Connecticut St. G.O., Ser. A, 5.50%, 11/15/08 .......................  11/03 at 102       9,292,412
                                                                                                          -----------
                  DISTRICT OF COLUMBIA -- 0.8%
   AAA     1,900  District of Columbia G.O., Ser. E, 6.00%, 6/01/09, CAPMAC ...........   6/03 at 102       2,032,525
                                                                                                          -----------
                  FLORIDA -- 2.7%
   AAA     1,750  Florida Hsg. Fin. Agcy. Rev., Sngl. Fam. Mtg., 
                    Ser. 1994-A, 6.55%, 7/01/14 .......................................   1/05 at 102       1,882,300
   AAA       550  Florida St. Div. Brd. Fin. Dept. Env. Prot., 
                    5.50%, 7/01/09, FSA ...............................................   7/08 at 101         582,659
   BBB-    4,000  Santa Rosa Bay Bridge Auth. Rev., 6.25%, 7/01/28. ...................   7/06 at 102       4,368,360
                                                                                                          -----------
                                                                                                            6,833,319
                                                                                                          -----------
                  GEORGIA -- 3.4%
   AAA     6,000  Georgia Mun. Pwr. & Elec. Auth., Ser. T, 6.50%, 1/01/99+++, FGIC ....           N/A       6,103,500
   AA+     2,250  Georgia St. Hsg. & Fin. Auth. Rev., Sngl. Fam. Mtg., 
                    Ser. C, 7.00%, 12/01/15, FHA ......................................  12/04 at 102       2,441,565
                                                                                                          -----------
                                                                                                            8,545,065
                                                                                                          -----------
                  ILLINOIS -- 8.5%
   AAA     5,050  Chicago Wtr. Rev.,  5.25%, 11/01/23, FGIC ...........................  11/07 at 102       4,932,588
   AAA     3,000  Cook Cnty. Cap. Impt. 5.875%, 11/15/22, FGIC ........................  11/06 at 101       3,147,270
   AAA     4,165  Cook Cnty. G.O., Ser. A, 5.20%, 11/15/08, MBIA ......................  11/07 at 101       4,310,067
                  Illinois Edl. Fac. Auth. Rev., Loyola Univ., FGIC,
   AAA     5,000    4.125%+, 7/01/13 ..................................................   7/03 at 102       5,204,850
   AAA     4,000    5.45%, 7/01/14 ....................................................   7/03 at 102       4,099,280
                                                                                                          -----------
                                                                                                           21,694,055
                                                                                                          -----------
                  INDIANA -- 6.4%
   Baa2    7,595  Indianapolis Arpt. Auth. Rev., Spl. Fac. Fed. Express Corp. Proj., 
                    7.10%, 1/15/17 ....................................................   7/04 at 102       8,511,261
   AAA     8,150  Marion Cnty. Cnvtn. & Rec. Fac. Auth., Excise Tax Rev., 
                    Ser. A., 5.00%, 6/01/27, MBIA .....................................   6/08 at 101       7,675,344
                                                                                                          -----------
                                                                                                           16,186,605
                                                                                                          -----------
                  KENTUCKY -- 6.1%
   AAA    15,000  Kentucky St. Tpke. Auth., Econ. Dev. Road Rev., 3.95%+, 
                    7/01/13, AMBAC ....................................................   7/03 at 102      15,624,300
                                                                                                          -----------
                  LOUISIANA -- 7.0%
   AAA    14,400  Louisiana Pub. Fac. Auth. Hosp. Rev., 
                    Our Lady of the Lake Regl. Med. Ctr., 4.19%+, 12/01/22, FSA .......  12/03 at 102      14,833,152
   AAA     2,860  Louisiana Stadium & Expo Dist., Htl. Ocpcy. Tax, 6.00%, 
                    7/01/16, FGIC .....................................................   7/06 at 102       3,065,291
                                                                                                          -----------
                                                                                                           17,898,443
                                                                                                          -----------

                                              See Notes to Financial Statements.
</TABLE>

                                                                5
<PAGE>
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                                           OPTION CALL        VALUE
  RATING*  (000)                              DESCRIPTION (A)                              PROVISIONS+      (NOTE 1)
- ---------------------------------------------------------------------------------------------------------------------------
<S>      <C>                                                                             <C>              <C>
                  MARYLAND -- 5.5%
   AA    $ 9,940  Maryland St. Dept. Hsg. & Comn. Dev. Admin., Sngl. Fam. Prog., 
                    Ser. 2, 6.55%, 4/01/26 ...........................................    4/05 at 102     $10,679,834
   AAA     3,175  Northeast Waste Disp. Auth. Rev., Sld. Wst., 
                    Montgomery Cnty. Res. Rec. Proj., Ser. A, 6.30%, 7/01/16, MBIA ...    7/03 at 102       3,398,044
                                                                                                          -----------
                                                                                                           14,077,878
                                                                                                          -----------
                  MASSACHUSETTS -- 3.4%
   AAA     9,000  Massachusetts St. Hlth.&  Edl. Fac. Auth. Rev., 
                    Hallmark Hlth. Sys., Ser. A., 5.00%
                    7/01/21, FSA .....................................................    7/08 at 101       8,549,730
                                                                                                          -----------
                  MICHIGAN -- 3.8%
   AAA     4,000  Greater Detroit Res. Rec. Auth. Rev., Ser. A, 6.25%, 
                    12/13/08, AMBAC ..................................................   No Opt. Call       4,479,480
   AAA     5,000  River Rouge Sch. Dist., 5.625%, 5/01/22, FSA ....................... 5/03 at 101.50       5,128,550
                                                                                                          -----------
                                                                                                            9,608,030
                                                                                                          -----------
                  NEVADA -- 1.6%
   AAA     3,750  Washoe Cnty. Arpt. Auth., Arpt. Sys. Impvt. Rev., Ser. B, 5.80%, 
                    7/01/09, MBIA ....................................................    7/03 at 102       4,003,462
                                                                                                          -----------
                  NEW YORK -- 21.8%
   AAA     5,400  Metropolitan Trans. Auth. Commuter Fac. Rev., 
                    Ser. A, 5.75%, 7/01/21, MBIA .....................................    7/07 at 101       5,616,000
                  New York City G.O.,
   Baa1    4,140    Ser. A, 6.00%, 8/01/05 ...........................................   No Opt. Call       4,424,791
   AAA     3,000    Ser. D, 5.60%, 11/01/05, AMBAC ...................................   No Opt. Call       3,182,520
   Baa1    7,000    Ser. E,  6.50%, 2/15/06 ..........................................   No Opt. Call       7,702,940
   Baa1    6,160    Ser. H, 7.20%, 2/01/02+++,                                                    N/A       6,826,574
   Baa1      840    Ser. H, 7.20%, 2/01/13 ........................................... 2/02 at 101.50         921,136
                  New York City Ind. Dev. Agcy. Spec. Fac. Rev., Term. 
                    One Group Assoc. Proj.,
   A       4,000    6.00%, 1/01/08 ...................................................    1/04 at 102       4,217,880
   A       1,000    6.00%, 1/01/15 ...................................................    1/04 at 102       1,039,690
   AA      4,000  New York City Transitional Fin. Auth. Rev., Ser. C, 4.75%, 5/01/23 .    5/08 at 102       3,640,640
   A3      3,000  New York St. Dorm. Auth. Rev., St. Univ. Edl. Fac., 
                    Ser. B, 6.10%, 5/15/04+++ ........................................           N/A        3,296,790
   Baa1    4,000  New York St. Hsg. Fin. Agcy., Svc. Contract Oblig. Rev., 
                    Ser. A, 5.50%, 9/15/22 ...........................................   3/03 at 102        3,994,680
   Baa     1,955  New York St. Hsg. Fin. Agcy. Rev., Hlth. Fac. of New York City, 
                    Ser. A, 6.375%, 11/01/04 .........................................  No Opt. Call        2,117,949
   AAA     5,000  New York St. Med. Care Fac. Rev., New York Hosp., 
                    Ser. A, 6.60%, 2/15/05+++, AMBAC .................................           N/A        5,681,050
   AAA     2,620  New York St. Urban Dev. Corp. Rev., Correctional Fac. 5.625%, 
                    1/01/07, AMBAC ...................................................   1/03 at 102        2,777,148
                                                                                                          -----------
                                                                                                           55,439,788
                                                                                                          -----------
                  NORTH CAROLINA -- 2.3%
   AAA     5,000  North Carolina Eastn. Mun. Pwr. Agcy. Rev., Ser. B, 7.00%, 
                    1/01/08, CAPMAC ..................................................  No Opt. Call        5,826,900
                                                                                                          -----------

                  OHIO -- 0.7%
   NR        500  Cleveland Cuyahoga Cnty. Ohio Port Auth. Rev., Port Dev. Proj.,
                    6.00%, 3/01/07 ...................................................   No Opt. Call         509,335

   AAA     1,220  Ohio St. Higher Edl. Fac. Com., Univ. Dayton Proj., 
                    5.35%, 12/01/17, AMBAC ...........................................   12/07 at 101       1,242,106
                                                                                                          -----------
                                                                                                            1,751,441
                                                                                                          -----------
                  PENNSYLVANIA -- 9.5%
   AAA    10,100  Lehigh Cnty. Gen. Purpose Auth. Rev., St. Lukes Hosp. 
                    Bethlehem Proj., 4.00%,+ 11/15/13, AMBAC .........................   11/03 at 102      10,198,980
   AAA     7,000  Montgomery Cnty. Ed. & Hlth. Care Auth., Holy Redeemer,
                    5.25%, 10/01/23, AMBAC ...........................................   10/07 at 101       6,894,230
   AAA     4,000  Pennsylvania Intergovernmental Coop. Auth., Spl. Tax Rev., 
                    Philadelphia Fdg. Prog., 5.50%, 6/15/20, FGIC ....................    6/06 at 100       4,057,480
   AAA     1,500  Pennsylvania St. G.O., First Ser., 5.375%, 5/15/09, FGIC ........... 5/06 at 101.50       1,575,870
   AAA     1,500  Pittsburgh Wtr. & Swr. Auth., Ser. A., 5.00%, 9/01/17, FGIC ........    3/08 at 100       1,440,495
                                                                                                          -----------
                                                                                                           24,167,055
                                                                                                          -----------
                  RHODE ISLAND -- 2.3%
   AA+     3,640  Rhode Island Hsg. & Mtg. Fin., Homeownership Oppty., 
                    Ser. 15-B, 6.75%, 10/01/17 .......................................    4/04 at 102       3,914,092
   AAA     2,000  Rhode Island St. Hlth. & Edu. Bldg. Corp. Rev., Hosp. Fin.,  
                    5.50%, 5/15/16, MBIA .............................................    5/07 at 102       2,054,100
                                                                                                          -----------
                                                                                                            5,968,192
                                                                                                          -----------
                  TENNESSEE -- 3.4%
   A3      7,800  Maury Cnty. Ind. Dev. Brd., P.C.R., Saturn Corp. Proj., 
                    6.50%, 9/01/24 ...................................................   9/04 at 102        8,544,588
                                                                                                          -----------
                  TEXAS -- 9.9%
   AAA     9,500  Austin Util. Sys. Rev., 5.00%, 11/15/14, FSA .......................   11/07 at 100       9,299,550
   BBB+    9,800  Brazos River Auth., P.C.R., Coll-Texas Utilities Co.Proj., 
                    8.25%, 1/01/19 ...................................................    1/99 at 100      10,221,498

                                               See Notes to Financial Statements.

                                                               6
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
         PRINCIPAL                                                                           OPTION
          AMOUNT                                                                              CALL
RATING*    (000)                               DESCRIPTION                                PROVISIONS++      (NOTE 1)
- ---------------------------------------------------------------------------------------------------------------------------

<S>      <C>                                                                             <C>              <C>
                  TEXAS (CONTINUED)
   A2    $ 2,500  Port of Bay City Auth. Matagorda Cnty. Rev., 
                    Hoechst Celanese Corp. Proj., 6.50%, 5/01/26 .....................    5/06 at 102    $  2,745,475
   Baa1    2,640  Sabine River Auth., P.C.R., Coll-Texas Utilities Elec. Proj.,
                    Ser. B, 8.25%, 10/01/20 ..........................................   10/00 at 102       2,893,414
                                                                                                         ------------
                                                                                                           25,159,937
                                                                                                         ------------
                  UTAH -- 6.8%
   AAA     4,450  Intermountain Pwr. Agcy., Rev. Pwr. Supply, 
                    Ser. F, 5.00%, 7/01/13, AMBAC ....................................   No Opt. Call       4,351,566
   A1      1,800  Intermountain Pwr. Agcy., Fst. Crossover, Ser. 86 B, 
                    5.00%, 7/01/16 ...................................................   No Opt. Call       1,708,956
   BBB    11,250  Tooele Cnty. Hazardous Wst. Trmt. Rev., Union Pacific Proj., 
                    5.70%, 11/01/26 ..................................................    4/08 at 102      11,245,725
                                                                                                         ------------
                                                                                                           17,306,247
                                                                                                         ------------
                  WASHINGTON -- 10.8%
   Aa      6,900  Seattle G.O., 5.40%, 1/01/08 .......................................    1/03 at 102       7,128,321
   AA+     4,000  Washington St. G.O., Ser. A,  5.375%, 7/01/21 ......................    7/06 at 100       3,996,000
                  Washington St. Pub. Pwr. Supply Sys. Rev.,
   AAA    13,395    Nuclear Proj. No. 1, 5.75%, 7/01/11, MBIA ........................    7/06 at 102      14,136,815
   AAA     2,000    Nuclear Proj. No. 2, 5.55%, 7/01/10, FGIC ........................    7/03 at 102       2,049,440
                                                                                                         ------------
                                                                                                           27,310,576
                                                                                                         ------------
                  Total Long-Term Investments (cost $359,509,483) ....................                    377,639,942
                                                                                                         ------------
                  SHORT-TERM INVESTMENTS** -- 1.9%
                  GEORGIA -- 0.1%
   A         100  Bartow Cnty. Dev. Auth., P.C.R., GA Pwr. Co., 4.05%, 5/01/98, FRDD .            N/A         100,000
                                                                                                         ------------
                  MISSISSIPPI -- 0.4%
   Aa2     1,000  Jackson Cnty., P.C.R., Chevron U.S.A. Inc. Proj.,  4.10%, 
                    5/01/98, FRDD ....................................................            N/A       1,000,000
                                                                                                         ------------
                  WASHINGTON -- 0.5%
                  Washington St. Hlth. Care Fac. Auth. Rev., Sisters of Providence, FRDD,
   A-1+      110    Ser. B, 4.15%, 5/01/98 ...........................................            N/A         110,000
   A1      1,300    Ser. D, 4.15%, 5/01/98 ...........................................            N/A       1,300,000
                                                                                                         ------------
                                                                                                            1,410,000
                                                                                                         ------------
                  WYOMING -- 0.9%
   Aa2     2,300  Unita Cnty., P.C.R., Chevron USA Inc. Proj., 4.10%, 5/01/98, FRDD ..            N/A       2,300,000
                                                                                                         ------------
                  Total Short-Term Investments (cost $4,810,000) .....................                      4,810,000
                                                                                                         ------------
                  TOTAL INVESTMENTS -- 150.5% (cost $364,319,483) ....................                    382,449,942
                       Other assets in excess of liabilities  -- 0.7% ................                      1,651,192
                  Liquidation value of preferred stock-- (51.2)% .....................                   (130,000,000)
                                                                                                         ------------
                  NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS-- 100% ................                   $254,101,134
                                                                                                         ============


</TABLE>


- -----------------
  * Rating: Using the higher of Standard & Poor's, Moody's or Fitch's rating.
 ** For  purposes  of  amortized  cost  valuation,  the  maturity  date of these
    instruments  is  considered  to be the earlier of the next date on which the
    security  can be  redeemed  at par or the  next  date on  which  the rate of
    interest is adjusted.
  + These bonds contain embedded caps. See glossary for definition.
 ++ Option call provisions:  date (month/year) and price of the earliest call or
    redemption.  There may be other call  provisions at varying  prices at later
    dates.
+++ This bond is prerefunded. See glossary for definition.


<TABLE>
<CAPTION>

- ------------------------------------------------------------------------------------------------------------------------------
                              THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:
     <S>        <C>                                                     <C>      <C>
     AMBAC      -- American Municipal Bond Assurance Corporation        FRDD     -- Floating Rate Daily Demand
     CAPMAC     -- Capital Markets Assurance Corporation                FSA      -- Financial Security Assurance
     FGIC       -- Financial Guaranty Insurance Company                 G.O.     -- General Obligation Bond
     FHA        -- Federal Housing Administration                       MBIA     -- Municipal Bond Insurance Association
                                                                        P.C.R.   -- Pollution Control Revenue
- ------------------------------------------------------------------------------------------------------------------------------
</TABLE>

                       See Notes to Financial Statements.

                                       7
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
ASSETS
Investments, at value
  (cost $364,319,483) (Note 1) ...........  $382,449,942
Cash .....................................        14,396
Interest receivable ......................     6,509,231
Receivable for investments sold ..........     5,576,083
Other assets .............................        20,201
                                           -------------
                                             394,569,853
                                           -------------
LIABILITIES
Payable for investments purchased ........    10,031,493
Investment advisory fee payable (Note 2) .       112,004
Administration fee payable (Note 2) ......        48,001
Dividends payable--preferred stock .......         27,191
Other accrued expenses ...................       250,030
                                           -------------
                                              10,468,719
                                           -------------

NET INVESTMENT ASSETS ....................  $384,101,134
                                           =============
Net investment assets were comprised of:
  Common stock:
    Par value (Note 4) ...................  $    167,071
    Paid-in capital in excess of par .....   232,077,765
  Preferred stock (Note 4) ...............   130,000,000
                                           -------------
                                             362,244,836
  Undistributed net investment income ....     1,556,139
  Accumulated net realized gain ..........     2,169,700
  Net unrealized appreciation ............    18,130,459
                                           -------------
  Net investment assets, April 30, 1998 ..  $384,101,134
                                           =============
  Net assets applicable to common
    shareholders .........................  $254,101,134
                                           =============
Net asset value per common share:
  ($254,101,134 / 16,707,093 shares of
    common stock issued and outstanding) .        $15.21
                                                  ======

- --------------------------------------------------------------------------------
THE BLACKROCK INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
NET INVESTMENT INCOME
Income
  Interest and discount earned ............  $10,135,982
                                            ------------

Expenses
  Investment advisory .....................      674,147
  Administration ..........................      288,920
  Auction agent ...........................      181,000
  Custodian ...............................       52,000
  Reports to shareholders .................       31,000
  Directors ...............................       29,000
  Audit ...................................       17,500
  Transfer agent ..........................       10,500
  Legal ...................................        3,000
  Miscellaneous ...........................       69,910
                                            ------------
  Total expenses ..........................    1,356,977
                                            ------------
Net investment income .....................    8,779,005
                                            ------------


REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS (NOTE 3)
Net realized gain on investments ..........    2,250,913
Net change in unrealized appreciation
  on investments ..........................     (215,997)
                                            ------------
Net gain on investments ...................    2,034,916
                                            ------------


NET INCREASE IN NET INVESTMENT ASSETS
  RESULTING FROM OPERATIONS ...............  $10,813,921
                                            ============


                       See Notes to Financial Statements.

                                       8
<PAGE>
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
THE BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST INC.
STATEMENTS OF CHANGES IN NET INVESTMENT ASSETS (UNAUDITED)
- ---------------------------------------------------------------------------------------------------------------------------

                                                                                       SIX MONTHS          YEAR
                                                                                          ENDED            ENDED
                                                                                        APRIL 30,       OCTOBER 31,
INCREASE (DECREASE) IN NET INVESTMENT ASSETS                                              1998              1997
                                                                                        ---------        ---------
<S>                                                                                  <C>               <C>         
OPERATIONS:
   Net investment income .......................................................     $  8,779,005      $ 18,096,994
   Net realized gain on investments ............................................        2,250,913         4,449,946
   Net change in unrealized appreciation on investments ........................         (215,997)        8,949,932
                                                                                     ------------      ------------
   Net increase in net investment assets resulting from operations .............       10,813,921        31,496,872

DIVIDENDS AND DISTRIBUTIONS:
   To common shareholders from net investment income ...........................       (6,578,090)      (13,100,478)
   To common shareholders from net realized gain on investments ................       (3,321,913)         (322,193)
   To preferred shareholders from net investment income ........................       (1,614,961)       (4,591,740)
   To preferred shareholders from net realized gain on investments .............       (1,123,540)         (104,104)
                                                                                     ------------      ------------
   Total dividends and distributions ...........................................      (12,638,504)      (18,118,515)
                                                                                     ------------      ------------
       Total increase (decrease) ...............................................       (1,824,583)       13,378,357

NET INVESTMENT ASSETS
Beginning of period ............................................................      385,925,717       372,547,360
                                                                                     ------------      ------------
End of period ..................................................................     $384,101,134      $385,925,717
                                                                                     ============      ============






                                                See Notes to Financial Statements.



                                                                9
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------------
THE BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- ---------------------------------------------------------------------------------------------------------------------------

                                                 SIX MONTHS                                              FOR THE PERIOD
                                                    ENDED               YEAR ENDED OCTOBER 31,        FEBRUARY 26, 1993*
                                                  APRIL 30,  ------------------------------------------- TO OCTOBER 31,
PER SHARE OPERATING PERFORMANCE:                    1998        1997       1996        1995         1994      1993
                                                   ------      ------      -----       -----       ------    ------
<S>                                               <C>        <C>         <C>         <C>         <C>       <C>     
Net asset value, beginning of period ..........   $ 15.32    $  14.52    $  14.18    $  12.05    $  14.76  $  14.10
                                                 --------    --------    --------    --------    --------   -------
   Net investment income ......................      0.53        1.08        1.09        1.10        1.06      0.66
   Net realized and unrealized gain (loss)
    on investments ............................      0.12        0.80        0.34        2.16       (2,64)     0.74
                                                 --------    --------    --------    --------    --------   -------
Net increase (decrease) from 
   investment operations ......................      0.65        1.88        1.43        3.26       (1.58)     1.40
                                                 --------    --------    --------    --------    --------   -------
Dividends and Distributions:
   Dividends from net investment income to:
     Common shareholders ......................     (0.39)      (0.78)      (0.79)      (0.82)      (0.90)    (0.45)
     Preferred shareholders ...................     (0.10)      (0.27)      (0.28)      (0.31)      (0.21)    (0.11)
  Distributions from net realized gain on
    investments to:
     Common shareholders ......................     (0.20)      (0.02)      (0.01)         --          --        --
     Preferred shareholders ...................     (0.07)      (0.01)      (0.01)         --          --        --
                                                 --------    --------    --------    --------    --------   -------
        Total Dividends and Distributions .....     (0.76)      (1.08)      (1.09)      (1.13)      (1.11)    (0.56)
                                                 --------    --------    --------    --------    --------   -------
Capital charge with respect to 
  issuance of shares ..........................        --          --          --          --       (0.02)    (0.18)
                                                 --------    --------    --------    --------    --------   -------
Net asset value, end of period** ..............  $  15.21    $  15.32    $  14.52    $  14.18    $  12.05   $ 14.76#
                                                 ========    ========    ========    ========    ========   =======
Per share market value, end of period** .......  $13.8125    $ 13.375    $  12.44    $  12.00    $ 10.375   $14.125
                                                 ========    ========    ========    ========    ========   =======
TOTAL INVESTMENT RETURN+ ......................      6.22%      14.20%      10.41%      24.01%     (20.98)%    3.36%
                                                 ========    ========    ========    ========    ========   =======
RATIOS TO AVERAGE NET ASSETS
  OF COMMON SHAREHOLDERS:++
Expenses ......................................      1.06%+++    1.07%       1.12%       1.16%       1.14%     1.04%+++
Net investment income before preferred 
  stock dividends .............................      6.88%+++    7.42%       7.57%       8.36%       7.80%     6.86%+++
Preferred stock dividends .....................      1.27%+++    1.88%       1.94%       2.34%       1.55%     1.11%+++
Net investment income available to common
  shareholders ................................      5.61%+++    5.54%       5.63%       6.02%       6.25%     5.75%+++
SUPPLEMENTAL DATA:
Average net assets of common shareholders 
  (in thousands) ..............................  $257,350    $243,947    $238,540    $219,740    $226,935  $236,810
Portfolio turnover ............................        22%        160%        164%        182%        210%      110%
Net assets of common shareholders, 
  end of period (in thousands) ................  $254,101    $255,926    $242,547    $236,990    $201,343  $246,631
Preferred stock outstanding (in thousands) ....  $130,000    $130,000    $130,000    $130,000    $130,000  $130,000
Asset coverage per share of preferred stock,
    end of period ## ..........................  $ 73,866    $ 74,217    $ 71,644    $ 70,575    $127,440  $144,858
</TABLE>

- ------------
   * Commencement of investment operations.
  ** Net asset value and market value are  published in THE WALL STREET  JOURNAL
     each Monday. # Net asset value  immediately  after the closing of the first
     public offering was $14.05.
  ## A stock split occurred on July 24, 1995 (Note 4)
   + Total investment  return is calculated  assuming a purchase of common stock
     at the  current  market  price on the first  day and a sale at the  current
     market  price  on the  last  day  of the  period  reported.  Dividends  and
     distributions,  if any, are assumed for purposes of this calculation, to be
     reinvested at prices obtained under the Trust's dividend reinvestment plan.
     Total  investment  return does not  reflect  brokerage  commissions.  Total
     investment returns for less than one full year are not annualized.
  ++ Ratios are  calculated  on the basis of income and expenses  applicable  to
     both the common and preferred  stock  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 periods  indicated.  This information
has been determined based upon financial  information  provided in the financial
statements and market value data for the Trust's shares.


                       See Notes to Financial Statements.


                                       10
<PAGE>

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

NOTE 1. ACCOUNTING                      The   BlackRock    Investment    Quality
POLICIES                                Municipal  Trust Inc.  (the "Trust") was
                                        organized  in Maryland  on November  19,
1992 as a diversified,  closed-end  management  investment company.  The Trust's
investment  objective is to manage a diversified  portfolio of  investment-grade
securities to achieve high current income exempt from regular Federal income tax
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 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 trade date.  Realized and unrealized gains and losses are calculated
on the identified  cost basis.  Interest income is recorded on the accrual basis
and  the  Trust  accretes  original  issue  discount  or  amortizes  premium  on
securities purchased using the interest method.

FEDERAL  INCOME  TAXES:  It is the  Trust's  intention  to  continue to meet the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies  and to distribute  sufficient  net income to  shareholders.  For this
reason and because  substantially  all of the Trust's  gross income  consists of
tax-exempt interest, no Federal income tax provision is required.

DIVIDENDS  AND  DISTRIBUTIONS:   The  Trust  declares  and  pays  dividends  and
distributions to common  shareholders  monthly from net investment  income,  net
realized short-term capital gains and other sources, if necessary. Net long-term
capital  gains,  if any,  in excess  of loss  carryforwards  may be  distributed
annually.  Dividends and  distributions  are recorded on the  ex-dividend  date.
Dividends and distributions to preferred shareholders are accrued and determined
as described in Note 4.

DEFERRED  ORGANIZATION  EXPENSES:  A total of $65,000 was incurred in connection
with the  organization  of the Trust.  These costs were  deferred and  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
BlackRock Advisors, Inc., which is an indirect majority-owned  subsidiary of PNC
Bank, N.A., and an Administration Agreement with Princeton Administrators,  L.P.
(the  "Administrator"),  an indirect wholly-owned  subsidiary of Merrill Lynch &
Co., Inc.

   The investment fee paid to the Adviser is computed weekly and payable monthly
at an annual rate of 0.35% of the Trust's average weekly net investment  assets.
The  administration  fee paid to the  Administrator  is also computed weekly and
payable  monthly at an annual  rate of 0.15% of the Trust's  average  weekly net
investment assets.

                                       11

<PAGE>
   Pursuant to the agreements,  the Adviser provides  continuous  supervision of
the investment  portfolio and pays the compensation of officers of the Trust who
are  affiliated  persons of the Adviser.  The  Administrator  pays occupancy and
certain  clerical and accounting  costs of the Trust.  The Trust bears all other
costs and expenses.


NOTE 3. PORTFOLIO                       Purchases   and   sales  of   investment
SECURITIES                              securities,    other   than   short-term
                                        investments,  for the six  months  ended
April 30,  1998,  aggregated  $84,778,616  and  $90,841,022,  respectively.

   The federal income tax basis of the Trust's investments at April 30, 1998 was
$364,400,705,  and  accordingly,  net unrealized  appreciation  was  $18,049,237
(gross  unrealized  appreciation--$18,635,174,  gross unrealized  depreciation--
$585,937).


NOTE 4. CAPITAL                         There are 200 million shares of $.01 par
                                        value  common stock  authorized.  Of the
16,707,093 common shares  outstanding at April 30, 1998, the Adviser owned 7,205
shares.  As of April 30,  1998,  there  were  5,200  shares of  Preferred  Stock
outstanding as follows:  Series T7--2,600 and Series  T28--2,600.  

   The Trust may classify or reclassify any unissued shares of common stock into
one or more series of preferred stock. On April 1, 1993, the Trust  reclassified
2,600  shares of common  stock and issued 2 series of Auction  Market  Preferred
Stock ("Preferred Stock") as follows: Series T7--1,300 shares, Series T28--1,300
shares.  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 the Trust's Auction Market  Preferred Stock into
two shares and simultaneously  reduce each share's  liquidation  preference from
$50,000 to $25,000  per share plus any  accumulated  but unpaid  dividends.  The
stock split occurred on July 24, 1995.  

   Dividends on Series T7 are  cumulative  at a rate which is reset every 7 days
based on the results of an auction.  Dividends on Series T28 are also cumulative
at a rate  which is reset  every 28 days  based on the  results  of an  auction.
Dividend  rates ranged from 3.30% to 6.01% during the six months ended April 30,
1998. 

   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, 1998,  the Board
AND DISTRIBUTIONS                       of  Directors  of the Trust  declared  a
                                        divi-dend from undistributed earnings of
$0.065625 per common share payable May 29, 1998,  to  shareholders  of record on
May 15,  1998.

   For the period May 1 through May 31,  dividends  declared on Preferred  Stock
totalled $415,311 in aggregate for the two outstanding Preferred Stock series.

                                       12


<PAGE>



- --------------------------------------------------------------------------------
              THE BLACKROCK 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.  Shareholders  who do not  participate  in the  Plan  will  receive  all
distributions  in cash paid by check in United States dollars mailed directly to
the shareholders of record (or if the shares are held in street or other nominee
name, then to the nominee) by the transfer agent, as dividend  disbursing agent.
The Plan Agent serves as agent for the shareholders in  administering  the Plan.
After the  Trust  declares  a  dividend  or  determines  to make a capital  gain
distribution,  the Plan Agent will, as agent for the  participants,  receive the
cash  payment and use it to buy Trust  shares in the open market on the New York
Stock Exchange for the participants'  accounts.  The Trust will not issue shares
under the Plan.

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

   The Plan Agent's fees for the handling of the  reinvestment  of dividends and
distributions  will be paid by the Trust.  However,  each participant will pay a
pro rata  share of  brokerage  commissions  incurred  with  respect  to the Plan
Agent's open market  purchases in connection with the  reinvestment of dividends
and  distributions.  The automatic  reinvestment of dividends and  distributions
will not relieve  participants of any federal,  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  or
terminated  by the Plan  Agent  upon at least 90  days'  written  notice  to all
shareholders  of the Trust.  All  correspondence  concerning  the Plan should be
directed  to the Plan Agent at (800)  699-1BFM.  The  address is on the front of
this report.

- --------------------------------------------------------------------------------
                             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 6, 1998 to vote on the following matters:  (1)To
elect two Directors as follows:
<TABLE>
<CAPTION>
         DIRECTOR                                                        CLASS             TERM           EXPIRING
         --------                                                        -----             -----           -------
<S>                                                                       <C>             <C>               <C>
         Ralph L. Schlosstein .....................................       II              3 years           2000
         Walter F. Mondale ........................................       II              3 years           2000
</TABLE>
         Directors whose term of office continues beyond this meeting are Andrew
         F. Brimmer,  Kent Dixon,  Laurence D. Fink, Richard E. Cavanagh,  James
         Grosfeld, Frank J. Fabozzi and James Clayburn La Force, Jr.

      (2)To ratify the selection of Deloitte & Touche LLP as independent  public
         accountants  of the Trust for the fiscal year ending  October 31, 1998.
         Shareholders  elected the two  Directors  and ratified the selection of
         Deloitte & Touche LLP. The results of the voting wasas follows:
<TABLE>
<CAPTION>
                                                                       VOTES FOR       VOTES AGAINST     ABSTENTIONS
                                                                       --------         -----------      ----------
<S>                                                                   <C>                    <C>           <C>    
         Ralph L. Schlosstein .....................................   13,897,300             0             161,037
         Walter F. Mondale ........................................   13,808,720             0             249,617
         Ratification of Deloitte & Touche LLP ....................   13,813,320          42,839           202,178
</TABLE>

                                       13

<PAGE>
- --------------------------------------------------------------------------------
              THE BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

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


WHO MANAGES THE TRUST?

BlackRock  Financial  Management,   Inc.   ("BlackRock")  is  an  SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $118
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international   securities.   Domestic  fixed  income  strategies   utilize  the
government,  mortgage,  corporate and municipal bond sectors.  BlackRock manages
twenty-one  closed-end  funds that are traded on either the New York or American
stock  exchanges,  and a $23 billion  family of open-end  equity and bond funds.
Current  institutional  clients  number 334,  domiciled in the United States and
overseas.


WHAT CAN THE TRUST INVEST IN?

Under normal  conditions,  the Trust expects to continue to manage its assets so
that at least 80% of its investments are rated at least  investment grade ("BBB"
by Standard & Poor's 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.  Examples  of the types of  securities  that the  Trust  may  invest in
include general  obligation bonds,  which are backed by the full taxing power of
the municipality  (states,  counties and cities),  and revenue bonds,  which are
backed by a revenue  source  associated  with the issuing  municipality  or by a
special tax.  Revenue bonds include those that are backed by revenues  generated
by universities,  hospitals, housing developments, utilities, public facilities,
toll roads, airports, etc.


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 municipal  debt  securities  that are  diversified  both  geographically  and
according to revenue source. As such, the Adviser actively manages the assets in
relation  to market  conditions  and  interest  rate  changes.  In  seeking  the
investment  objective,  the Trust does not expect to invest more than 25% of its
total assets in municipals that are issued by the same state. 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).

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.  To protect  the common  stockholders  from
increases in the cost of the  preferred  stock  dividends,  the Trust invests in
securities called "additional interest bonds" or "embedded caps", which can help
to limit the risk of increasing  costs of leverage in a rising  interest rate or
flattening  yield curve  environment.  These bonds pay additional  interest when
short-term  municipal interest rates rise above a predetermined  rate, or "cap".
These  securities  are used,  when available in the  marketplace,  to attempt to
offset  increases in the interest paid to preferred  stockholders  and may allow
the Trust to maintain  dividend  levels to common  stockholders in interest rate
environments  where the yield curve is either flat or  inverted.  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 New York  Stock  Exchange  which
provides investors with liquidity on a daily basis. Orders to buy or sell shares
of the Trust must be placed  through a registered  broker or financial  advisor.
The Trust pays monthly  dividends  which are typically paid on the last business
day of the month. For shares held in the  shareholder's  name,  dividends may be

                                       14

<PAGE>

reinvested in additional  shares of the fund through the Trust's transfer agent,
State  Street Bank and Trust.  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 Trust 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.  As mentioned  above, the Trust will attempt to maintain a percentage of
its investments in additional  interest bonds which may help protect the Trust's
income from increases in the cost of leverage.


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  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 New York Stock  Exchange  (NYSE symbol:  BKN) 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 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  elect  to  have  all  dividends  and
                         distributions of capital gains automatically reinvested
                         into additional shares of the Trust.

EMBEDDED CAP BONDS:      Also  known as  additional  interest  municipal  bonds.
                         These  securities  are  intended  to protect the income
                         that a fund earns  through  leverage  from  significant
                         increases  in  short-term  rates.  The  coupon on these
                         bonds   will   increase   if  short   term  rates  rise
                         significantly.

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.

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


                                       16

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



TAXABLE TRUSTS
- ---------------------------------------------------------------------------------------------------------------------------
                                                                                                             MATURITY
PERPETUAL TRUSTS                                                                     STOCK 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
- ---------------------------------------------------------------------------------------------------------------------------
                                                                                                             MATURITY
PERPETUAL TRUSTS                                                                     STOCK 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 DO NOT HESITATE TO CALL BLACKROCK AT (800) 227-7BFM (7236)
                                              OR CONSULT WITH YOUR FINANCIAL ADVISOR.
</TABLE>

                                                                 17

<PAGE>


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

      BlackRock Financial  Management,  Inc.  ("BlackRock") is an SEC-registered
investment  adviser.  BlackRock and its  affiliates  currently  manage over $118
billion  on behalf of  taxable  and  tax-exempt  clients  worldwide.  Strategies
include  fixed  income,  equity and cash and may  incorporate  both domestic and
international securities. BlackRock manages twenty-one closed-end funds that are
traded on either the New York or  American  stock  exchanges,  and a $23 billion
family of open-end equity and bond funds. Current  institutional  clients number
334, domiciled in the United States and overseas.

      BlackRock's  fixed  income  product  was  introduced  in 1988 by a team of
highly seasoned fixed income  professionals.  These  professionals had extensive
experience   creating,   analyzing   and  trading  a  variety  of  fixed  income
instruments,  including the most complex structured securities. In fact, several
individuals  at BlackRock  were  responsible  for  developing  many of the major
innovations  in  the  mortgage-backed   and  asset-backed   securities  markets,
including   the  creation  of  the  first  CMO,  the  floating   rate  CMO,  the
senior/subordinated pass-through and the multi-class asset-backed security.

      BlackRock  is unique  among asset  management  and  advisory  firms in the
emphasis it places on the  development of proprietary  analytical  capabilities.
Over one  quarter  of the  firm's  professionals  is  dedicated  to the  design,
maintenance  and use of these  systems,  which are not  otherwise  available  to
investors. BlackRock's proprietary analytical tools are used for evaluating, and
designing fixed income investment  strategies for client portfolios.  Securities
purchased include mortgages,  corporate bonds,  municipal bonds and a variety of
hedging instruments.

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

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

















                      IF YOU WOULD LIKE FURTHER INFORMATION
           PLEASE DO NOT HESITATE TO CALL BLACKROCK AT (800) 227-7BFM

                                       18

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

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

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

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

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

CUSTODIAN AND TRANSFER AGENT
State Street Bank and Trust Company
One Heritage Drive
North  Quincy,  MA 02171 
(800)  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, 1998 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 INVESTMENT
                          QUALITY MUNICIPAL TRUST INC.
                       c/o Princeton Administrators, L.P.
                                  P.O. Box 9095
                            Princeton, NJ 08543-9095
                                 (800) 227-7BFM
                                                                      09247D-105
                                                                      09247D-204
[Logo] Printed on recycled paper                                      09247D-303





THE BLACKROCK
INVESTMENT QUALITY
MUNICIPAL TRUST INC.
- ------------------------
SEMI-ANNUAL REPORT
APRIL 30, 1998



[GRAPHIC]



© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission