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

                                                                    May 30, 1997

Dear Trust Shareholder:

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

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

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

Sincerely,





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




                                       1

<PAGE>



                                                                    May 30, 1997

Dear Shareholder:

      We are  pleased  to  present  the  semi-annual  report  for The  BlackRock
Investment  Quality  Municipal Trust Inc. ("the Trust") for the six months ended
April 30,  1997.  We would like to take this  opportunity  to review the Trust's
stock price and net asset value (NAV) performance, summarize 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 this  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 period:

- --------------------------------------------------------------------------------
                            4/30/97    10/31/96   CHANGE    HIGH        LOW
- --------------------------------------------------------------------------------
  STOCK PRICE               $12.625    $12.4375    1.51%   $13.00     $12.25
- --------------------------------------------------------------------------------
  NET ASSET VALUE (NAV)     $14.41     $14.52     (0.76%)  $14.85     $14.18
- --------------------------------------------------------------------------------

THE FIXED INCOME MARKETS

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

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

      Municipal bonds outperformed their taxable  counterparts over the past six
months, with longer maturity municipals generally outperforming shorter maturity
issues.  The municipal market, as measured by the Lehman Brothers Municipal Bond
Index,  posted a 2.01% total return from  November 1, 1996 through April 1997 as
compared  against  the Lehman  Aggregate  Index's  return of 1.71% over the same
period.  Investor  demand for longer  dated  municipal  issues was  particularly
pronounced during the first quarter of 1997, in part because of a 10% decline in
new issuance due to a higher  interest rate  environment.  Additionally,  rising
interest rates created  increased demand from fixed income  investors  searching
for attractive  after-tax yields and as a potential  shelter from the volatility
of the equity markets.

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

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

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

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

                                SECTOR BREAKDOWN
- --------------------------------------------------------------------------------
      SECTOR                               APRIL 30, 1997     OCTOBER 31, 1996
- --------------------------------------------------------------------------------
    Power                                        21%                 12%
- --------------------------------------------------------------------------------
    Transportation                               20%                 22%
- --------------------------------------------------------------------------------
    University/School                            10%                  8%
- --------------------------------------------------------------------------------
    Industrial                                   10%                  9%
- --------------------------------------------------------------------------------
    Hospital                                      8%                  9%
- --------------------------------------------------------------------------------
    Lease Revenue                                 7%                 12%
- --------------------------------------------------------------------------------
    City, County & State                          6%                  8%
- --------------------------------------------------------------------------------
    Housing                                       5%                  6%
- --------------------------------------------------------------------------------
    Tax Revenue                                   5%                  1%
- --------------------------------------------------------------------------------
    Pollution Control                             4%                  7%
- --------------------------------------------------------------------------------
    Miscellaneous Revenue                         2%                  4%
- --------------------------------------------------------------------------------
    Resource Recovery                             1%                  1%
- --------------------------------------------------------------------------------
    Utility                                       1%                  --
- --------------------------------------------------------------------------------
    Water & Sewer                                 --                  1%
- --------------------------------------------------------------------------------

                                       3


<PAGE>



- --------------------------------------------------------------------------------
   STANDARD & POOR'S/MOODY'S/FITCH'S
           CREDIT RATING               APRIL 30, 1997       OCTOBER 31, 1996
- --------------------------------------------------------------------------------
              AAA/Aaa                       57%                    43%
- --------------------------------------------------------------------------------
               AA/Aa                         4%                     6%
- --------------------------------------------------------------------------------
                A/A                         14%                    21%
- --------------------------------------------------------------------------------
              BBB/Baa                       25%                    30%
- --------------------------------------------------------------------------------

      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 4/30/97:                               $12.625
- --------------------------------------------------------------------------------
   Net Asset Value as of 4/30/97:                                   $14.41
- --------------------------------------------------------------------------------
   Yield on Closing Stock Price as of 4/30/97 ($12.625)1:           6.24%
- --------------------------------------------------------------------------------
   Current Monthly Distribution per Share2:                         $0.065625
- --------------------------------------------------------------------------------
   Current Annualized Distribution per Share2:                      $0.7875
- --------------------------------------------------------------------------------

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

                                       4
<PAGE>

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

<S>       <C>                                                                              <C>              <C>   
                  LONG-TERM INVESTMENTS--151.8%
                  ALABAMA--2.2%
Baa1      $5,000  Courtland Indl. Dev. Brd. Indl. Dev. Rev., Champion Intl. Corp., 7.20%,     
                    12/01/13 ............................................................    5/02 at 103    $  5,395,150
                                                                                                           -------------

                  CALIFORNIA -- 11.8%
AAA       15,460  Los Angeles Cnty. Asset Leasing Corp. Rev., 5.95%, 12/01/07, AMBAC ....   No Opt. Call      16,727,102
AAA        4,750  Los Angeles Cnty. Met. Trans. Auth., Sales Tax Rev., Ser. A,
                    5.00%, 7/01/21, FGIC ................................................    7/03 at 100       4,208,120
                  University of California Rev., Research Facs., Ser. B,
A          2,000    6.10%, 9/01/10 ......................................................    9/03 at 102       2,053,900
A          3,305    6.20%, 9/01/11 ......................................................    9/03 at 102       3,393,673
A          2,000    6.25%, 9/01/12 ......................................................    9/03 at 102       2,033,720
                                                                                                           -------------
                                                                                                              28,416,515
                                                                                                           -------------
                  COLORADO -- 11.7%
                  Arapahoe Cnty. Cap. Impvt. Hwy. Rev., Trust Fund, Ser. E,
Baa        3,100    Zero Coupon, 8/31/04 ................................................   No Opt. Call       2,011,187
Baa        2,000    Zero Coupon, 8/31/07 ................................................ 8/05 at 89.239       1.060,260
Baa        2,250    6.90%, 8/31/15 ......................................................    8/05 at 103       2,387,835
                  Denver City & Cnty. Arpt. Rev.,
Baa        1,120    Ser. C, 6.65%, 11/15/05 .............................................   11/02 at 102       1,177,366
Baa        3,000    Ser. C, 6.50%, 11/15/06 .............................................   11/02 at 102       3,117,240
Baa       17,790    Ser. D, 7.00%, 11/15/25 .............................................   11/01 at 100      18,456,413
                                                                                                           -------------
                                                                                                              28,210,301
                                                                                                           -------------
                  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       1,936,537
                                                                                                           -------------
                  FLORIDA -- 5.2%
AAA        1,780  Florida Hsg. Fin. Agcy. Rev., Sngl. Fam. Mtg., Ser. 1994-A, 6.55%, 
                    7/01/14 .............................................................    1/05 at 102       1,842,353
Baa3       6,000  Martin Cnty. Indl. Dev. Auth., Indiantown Cogeneration Proj., Ser. A,    
                    7.875%, 12/15/25 ....................................................   12/04 at 102       6,693,300
BBB        4,000  Santa Rosa Bay Bridge Auth. Florida Rev., 6.25%, 7/01/28 ..............    7/06 at 102       3,956,640
                                                                                                           -------------
                                                                                                              12,492,293
                                                                                                           -------------
                  GEORGIA -- 3.6%
AAA        6,000  Georgia Mun. Pwr. & Elec. Auth., Ser. T, 6.50%, 1/01/99+++, FGIC ......    No Opt.Call       6,198,600
AA+        2,250  Georgia St. Hsg. & Fin. Auth. Rev., Sngl. Fam. Mtg., Ser. C, 7.00%, 
                    12/01/15, FHA .......................................................   12/04 at 102       2,361,105
                                                                                                           -------------
                                                                                                               8,559,705
                                                                                                           -------------
                  ILLINOIS -- 5.7%
AAA        4,650  Chicago O'Hare Int'l. Arpt. Spl. Fac. Rev., Luthansa Airlines Proj.,
                    7.125%, 5/01/18 .....................................................    5/01 at 102       4,992,194
                  Illinois Edl. Facs. Auth. Rev., Loyola Univ., FGIC,
AAA        5,000    4.125%+, 7/01/13 ....................................................    7/03 at 102       4,891,250
AAA        4,000    5.45%+, 7/01/14 .....................................................    7/03 at 102       3,849,480
                                                                                                           -------------
                                                                                                              13,732,924
                                                                                                           -------------
                  INDIANA -- 3.8%
Baa2       8,595  Indianapolis Arpt. Auth. Rev., Spl. Facs. Fed. Express Corp. Proj., 
                    7.10%, 1/15/17 ......................................................    7/04 at 102       9,201,721
                                                                                                           -------------

                  KENTUCKY -- 6.1%
AAA       15,000  Kentucky St. Tpke. Auth., Econ. Dev. Road Rev., 3.95%+, 7/01/13, AMBAC     7/03 at 102      14,756,700
                                                                                                           -------------
</TABLE>
                       See Notes to Financial Statements.

                                       5


<PAGE>

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

<S>       <C>                                                                              <C>              <C>   

                  LOUISIANA -- 12.8%
AAA      $14,400  Louisiana Pub. Facs. Auth. Hosp. Rev., Our Lady of the Lake Regl. 
                    Med. Ctr., 4.19%+, 12/01/22, FSA ....................................  12/03 at 102    $ 13,696,272
AAA        7,860  Louisiana Stadium & Expo Dist., Ser. B, 6.375%, 7/01/25, FGIC .........   7/05 at 102       8,217,159
AAA        8,860  Louisiana Stadium & Expo Dist., Htl., Ocpcy. Tax, 6.00%, 7/01/16, FGIC    7/06 at 102       8,962,953
                                                                                                          -------------
                                                                                                             30,876,384
                                                                                                          -------------
                  MARYLAND -- 6.2%
Aa         9,940  Maryland St. Dept. Hsg. & Comn. Dev. Admin., Sngl. Fam. Prog., Ser. 2, 
                    6.55%, 4/01/26 ......................................................   4/05 at 102      10,146,851
A-         1,500  Maryland St. Energy Fin. Admin., Bld. Wst. Disp. Rev., 
                    Wheelabrator Wtr. Proj., 6.45%, 12/01/16 ............................  12/06 at 102       1,543,050
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       3,239,770
                                                                                                          -------------
                                                                                                             14,929,671
                                                                                                          -------------

                  MASSACHUSETTS -- 10.9%
AAA       23,000  Massachusetts Mun. Whsl Elec. Co. Pwr.Supply Sys. Rev., Ser. A,
                    5.45%, 7/01/18, AMBAC ...............................................   7/03 at 102      21,404,260
A1         4,850  New England Ed. LnMktg Corp. Ser. F, 5.625%, 7/01/04 ..................  No Opt. Call       4,872,941
                                                                                                          -------------
                                                                                                             26,277,201
                                                                                                          -------------

                  MISSOURI -- 0.4%
NR         1,000  Lake of The Ozarks Comn. Bridge, 6.25%, 12/01/16 ......................  12/06 at 102         977,550
                                                                                                          -------------
                  NEVADA -- 9.4%
                  Clark Cnty. Sch. Dist., Bldg. &Renovation Ser. B, FGIC
AAA       10,000    5.50%, 6/15/15 ......................................................   6/07 at 101       9,684,300
AAA        9,215    5.625%, 6/15/13 .....................................................   6/07 at 101       9,157,406
AAA        3,750  Washoe Cnty. Arpt. Auth., Arpt. Sys. Impvt. Rev., Ser. B, 5.80%, 
                    7/01/09, MBIA .......................................................   7/03 at 102       3,830,475
                                                                                                          -------------
                                                                                                             22,672,181
                                                                                                          -------------
                  NEW YORK -- 21.8%
                  New York City, G.O.,
Baa1       4,140    Ser. A, 6.00%, 8/01/05 ..............................................  No Opt. Call       4,228,762
Baa1       7,000    Ser. E, 6.50%, 2/15/06 ..............................................  No Opt. Call       7,348,320
Baa1       7,000    Ser. H, 7.20%, 2/01/13 .............................................. 2/02 at 101.5       7,574,280
                  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       4,103,200
A          1,000    6.00%, 1/01/15 ......................................................   1/04 at 102         990,060
A          7,000    6.00%, 1/01/19 ......................................................   1/04 at 102       6,907,040
AAA        8,000  New York St. ThruwayAuth. Service Contract Rev., LocalHwy &Bridge,
                    5.75%, 4/01/13, MBIA ................................................   4/04 at 102       8,033,760
AAA        2,620  New York St. Urban Dev. Corp. Rev., Correctional Facs, 5.625%,
                    1/01/07, AMBAC ......................................................   1/03 at 102       2,706,224
Baa1       3,000  New York St. Dorm. Auth. Rev., St. Univ. Edl. Facs., Ser. B, 6.10%, 
                    5/15/09 .............................................................   5/04 at 102       3,065,070
Baa        1,955  New York St. Hsg. Fin. Agcy. Rev., Hlth. Facs. of New York City, 
                    Ser. A, 6.375%, 11/01/04 ............................................  No Opt. Call       2,045,380
AAA        5,000  New York St. Med. Care Facs. Rev., New York Hosp., Ser. A, 6.60%, 
                    2/15/09, AMBAC ......................................................   2/05 at 102       5,456,750
                                                                                                          -------------
                                                                                                             52,458,846
                                                                                                          -------------
                  NORTH CAROLINA -- 6.6%
                  North Carolina Eastn. Mun. Pwr. Agcy. Rev., Ser. B, CAPMAC,
AAA        5,300    6.00%, 1/01/22 ......................................................  No Opt. Call       5,350,774
AAA        2,500    6.00%, 1/01/26 ......................................................  No Opt. Call       2,531,000
AAA        5,000    7.00%, 1/01/08 ......................................................  No Opt. Call       5,656,700
A3         2,150  North Carolina Mun. Pwr, Agcy, Elec. Rev., Catawba No. 1, 7.50%, 
                    1/01/17 .............................................................   1/98 at 102       2,224,949
                                                                                                          -------------
                                                                                                             15,763,423
                                                                                                          -------------



</TABLE>
                       See Notes to Financial Statements.

                                       6


<PAGE>
<TABLE>
<CAPTION>

- -------------------------------------------------------------------------------------------------------------------------
         PRINCIPAL                                                                              OPTION
          AMOUNT                                                                                 CALL            VALUE
RATING*    (000)                                DESCRIPTION                                  PROVISIONS++       (NOTE 1)
- ------------------------------------------------------------------------------------------------------------------------

<S>       <C>                                                                              <C>              <C>   

                  OHIO -- 0.4%

NR       $ 1,000  CLEVELAND CUYAHOGA CNTY, OHIO PORT AUTH., REV., 
                     PORT DEV. PROJ.      
                     6.00%, 3/01/07 ..................................................... NO OPT. CALL     $     976,380
                                                                                                           -------------


                  PENNSYLVANIA -- 5.6%
AAA       10,100  Lehigh Cnty. Gen. Purpose Auth. Rev., St. Lukes Hosp. Bethlehem Proj.,
                    4.00%+, 11/15/13, AMBAC ............................................. 11/03 at 102         9,684,284
AAA        4,000  Pennsylvania Intergovernmental Coop. Auth., Spl. Tax Rev.,Philadelphia
                    Fdg. Prog., 5.50%, 6/15/20, FGIC ....................................  6/06 at 100         3,823,400
                                                                                                           -------------
                                                                                                              13,507,684
                                                                                                           -------------
                  RHODE ISLAND -- 2.5%
AA+        3,785  Rhode Island Hsg. & Mtg. Fin., Homeownership Oppty., Ser. 15-B, 
                    6.75%, 10/01/17 .....................................................  4/04 at 102         3,937,081
AAA        2,000  Rhode Island St Hlth. & Edu, Bldg. Corp., Rev., Hosp. Fin. 5.50%, 
                    5/15/16, MBIA .......................................................  5/07 at 102         1,926,600
                                                                                                           -------------
                                                                                                               5,863,681
                                                                                                           -------------
                  TENNESSEE -- 3.7%
A3         8,500  Maury Cnty. Ind. Dev. Brd. Poll. Ctrl. Rev., Saturn Corp. Proj., 
                    6.50%, 9/01/24 ......................................................  9/04 at 102         8,864,310
                                                                                                           -------------
                  TEXAS -- 8.2%
Baa1       9,800  Brazos River Auth. Poll. Ctrl. Rev., Coll-Texas Utilities Co. Proj., 
                    8.25%, 1/01/19 ......................................................  1/99 at 102        10,435,922
A3         3,625  Matagorda Cnty, Nav. Dist. No. 1 Rev., Coll-Houston Light &Pwr, Ser. B
                    7.70%, 2/01/19 ......................................................  2/98 at 102         3,766,230
A2         2,500  Port of Bay City Auth. Matagorda Cnty, Rev., Hoechst Celanese 
                    Corp. Proj.,
                    6.50%, 5/01/26 ......................................................  5/06 at 102         2,589,175
Baa1       2,640  Sabine River Auth. Poll, Ctrl, Rev., Coll-Texas Utilities Elec. Proj.,
                    Ser. B, 8.25%, 10/01/20 ............................................. 10/00 at 102         2,900,304
                                                                                                           -------------
                                                                                                              19,691,631
                                                                                                           -------------
                  UTAH -- 2.4%
AAA        4,450  Intermountain Pwr. Agcy, Rev, Pwr, Supply, Ser. F, 5.00%, 7/01/13, 
                    AMBAC ...............................................................  6/97 at 100         4,052,215
A1         1,800  IntermountainPwr. Agcy. Fst.Crossover Ser. 86 B, 5.00%, 7/01/16 .......  6/97 at 100         1,603,674
                                                                                                           -------------
                                                                                                               5,655,889
                                                                                                           -------------
                  WASHINGTON -- 8.5%
                  Washington St. Pub. Pwr. Supply Sys. Rev.,
AAA       13,395    Nuclear Proj. No. 1, 5.75%, 7/01/11, MBIA ...........................  7/06 at 102        13,420,852
AAA        2,000    Nuclear Proj. No. 2, 5.55%, 7/01/10, FGIC ...........................  7/03 at 102         1,940,660
AAA        5,000    Nuclear Proj. No. 1, Ser. A, 6.25%, 7/01/17, MBIA ...................  7/02 at 102         5,070,900
                                                                                                           -------------
                                                                                                              20,432,412
                                                                                                           -------------
                 
                  WEST VIRGINIA -- 1.5%
A2         3,500  Braxton Cnty. Sld. Wst. Auth., Weyerhaeuser Co. Proj., 6.50%, 4/01/25 .  4/05 at 102         3,630,865
                                                                                                           -------------
                  Total Long-Term Investments (cost $359,186,261)                                            365,279,954
                                                                                                           -------------
                  SHORT-TERM INVESTMENTS** -- 1.3%
A1+        3,200  Washington St HlthCare Fac. Auth. Rev., 3.95%, 5/01/97, FRDD                                 3,200,000
                                                                                                           -------------
                  TOTAL INVESTMENTS-- 153.1% (COST $362,386,261)                                             368,479,954
                  Other assets in excess of liabilities-- 0.9%                                                 2,204,528
                  Liquidation value of preferred stock-- (54.0)%                                            (130,000,000)
                                                                                                           -------------
                  NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS-- 100%                                       $240,684,482
                                                                                                           =============
</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 prices 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.

- --------------------------------------------------------------------------------
         THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:
     AMBAC          -- American Municipal Bond Assurance Corporation    
     CAPMAC         -- Capital Markets Assurance Corporation            
     FHA            -- Federal Housing Administration                  
     FGIC           -- Financial Guaranty Insurance Company             
     FRDD           -- Floating Rate Daily Demand**
     FSA            -- Financial Security Assurance
     G.O.           -- General Obligation Bond
     MBIA           -- Municipal Bond Insurance Association
- --------------------------------------------------------------------------------
                  
                       See Notes to Financial Statements.

                                       7
<PAGE>


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

ASSETS
Investments, at value
  (cost $362,386,261) (Note 1) .................. $368,479,954
Cash ............................................       21,114
Receivable for investments sold .................    3,871,553
Interest receivable .............................    6,722,132
Deferred organization expenses and other assets .       28,065
                                                  ------------
                                                   379,122,818
                                                  ------------
LIABILITIES
Payable for investments purchased ...............    7,849,593
Dividends payable--common stock .................      193,723
Dividends payable--preferred stock ..............       13,901
Investment Advisory fee payable (Note 2) ........      107,685
Administration fee payable (Note 2) .............       46,151
Other accrued expenses ..........................      227,283
                                                  ------------
                                                     8,438,336
                                                  ------------
NET INVESTMENT ASSETS                             $370,684,482
                                                  ============
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 ...........      952,205
  Accumulated net realized gain .................    1,393,748
  Net unrealized appreciation ...................    6,093,693
                                                  ------------
  Net investment assets, April 30, 1997 ......... $370,684,482
                                                  ============
  Net assets applicable to common
    shareholders ................................ $240,684,482
                                                  ============
Net asset value per common share:
  ($240,684,482 / 16,707,093 shares of
    common stock issued and outstanding) ........       $14.41
                                                        ======




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

NET INVESTMENT INCOME
Income
  Interest and discount earned               $10,434,128
                                             -----------


Expenses
  Investment advisory                            650,394
  Administration                                 278,740
  Auction agent                                  181,181
  Custodian                                       48,000
  Reports to shareholders                         35,000
  Directors                                       28,000
  Audit                                           19,000
  Transfer agent                                  10,000
  Legal                                            5,000
  Miscellaneous                                   58,331
                                             -----------
  Total expenses                               1,313,646
                                             -----------
Net investment income                          9,120,482
                                             -----------
REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS (NOTE 3)
Net realized gain on investments               1,462,413
Net change in unrealized appreciation
  on investments                              (3,302,831)
                                             -----------
Net loss on investments                       (1,840,418)
                                             -----------
NET INCREASE IN NET INVESTMENT ASSETS
  RESULTING FROM OPERATIONS                  $ 7,280,064
                                             ===========
                                           

                       See Notes to Financial Statements.

                                       8


<PAGE>



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

                                                                                       SIX MONTHS          YEAR
                                                                                          ENDED            ENDED
                                                                                        APRIL 30,       OCTOBER 31,
                                                                                          1997             1996
                                                                                        ---------        ---------

<S>                                                                                  <C>               <C>         
INCREASE (DECREASE) IN NET INVESTMENT ASSETS

OPERATIONS:
   Net investment income ........................................................    $  9,120,482      $ 18,067,373
   Net realized gain on investments .............................................       1,462,413         5,454,251
   Net change in unrealized appreciation on investments .........................      (3,302,831)          140,869
                                                                                     ------------      ------------
   Net increase in net investment assets resulting from operations ..............       7,280,064        23,662,493
                                                                                     ------------      ------------
   DIVIDENDS AND DISTRIBUTIONS:
   To common shareholders from net investment income ............................      (6,522,266)      (13,156,544)
   To common shareholders from net realized gain on investments .................        (266,228          (239,692)
   To common shareholders in excess of net realized gain on investments .........         (55,965)               --
   To preferred shareholders from net investment income .........................      (2,195,913)       (4,619,604)
   To preferred shareholders from net realized gain on investments ..............         (84,500)          (89,343)
   To preferred shareholders in excess of net realized gain on investments ......         (18,070)               --
                                                                                     ------------      ------------
   Total dividends and distributions ............................................      (9,142,942)      (18,105,183)
                                                                                     ------------      ------------
       Total increase (decrease) ................................................      (1,862,878)        5,557,310

NET INVESTMENT ASSETS
Beginning of period .............................................................     372,547,360       366,990,050
                                                                                     ------------      ------------
End of period ...................................................................    $370,684,482      $372,547,360
                                                                                     ============      ============

</TABLE>

                       See Notes to Financial Statements.

                                       9



<PAGE>

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

                                                                                                           FOR THE PERIOD
                                                                                                                ENDED
                                                            SIX MONTHS                                      FEBRUARY 26,
                                                               ENDED           YEAR ENDED OCTOBER 31,           1993*
                                                             APRIL 30,    -------------------------------   TO OCTOBER 31,
PER SHARE OPERATING PERFORMANCE:                                1997       1996        1995        1994         1993
                                                             ---------     ----        ----        ----    --------------

<S>                                                          <C>         <C>          <C>         <C>         <C>    
Net asset value, beginning of period                         $ 14.52     $ 14.18      $ 12.05     $ 14.76     $ 14.10
                                                             -------     -------      -------     -------     -------
   Net investment income                                        0.55        1.09         1.10        1.06        0.66
   Net realized and unrealized gain (loss) on investments      (0.11)       0.34         2.16       (2.64)       0.74
                                                             -------     -------      -------     -------     -------
Net increase (decrease) from investment operations              0.44        1.43         3.26       (1.58)       1.40
                                                             -------     -------      -------     -------     -------
Dividends and Distributions:
   Dividends from net investment income to:
     Common shareholders                                       (0.39)      (0.79)       (0.82)      (0.90)      (0.45)
     Preferred shareholders                                    (0.13)      (0.28)       (0.31)      (0.21)      (0.11)
   Distributions from net realized gain on investments to:
     Common shareholders                                       (0.02)      (0.01)          --          --          --
     Preferred shareholders                                    (0.01)      (0.01)          --          --          --
   Distributions in excess of net realized gain on 
     investments to:
     Common shareholders                                         ***          --           --          --          --
     Preferred shareholders                                      ***          --           --          --          --
                                                             -------     -------      -------     -------     -------
             Total dividends and distributions                 (0.55)      (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**                             $ 14.41     $ 14.52      $ 14.18     $ 12.05     $ 14.76#
                                                             =======     =======      =======     =======     =======    
Per share market value, end of period**                      $12.625     $ 12.44      $ 12.00     $10.375     $14.125
                                                             =======     =======      =======     =======     =======
TOTAL INVESTMENT RETURN+                                        4.69%      10.41%       24.01%     (20.98)%      3.36%
                                                             =======     =======      =======     =======     =======
RATIOS TO AVERAGE NET ASSETS OF COMMON
  SHAREHOLDERS:+++
Expenses                                                       1.08%++     1.12%        1.16%       1.14%       1.04%++
Net investment income before preferred stock dividends         7.50%++     7.57%        8.36%       7.80%       6.86%++
Preferred stock dividends                                      1.89%++     1.97%        2.34%       1.55%       1.11%++
Net investment income available to common shareholders         5.61%++     5.60%        6.02%       6.25%       5.75%++
                                                             -------     -------      -------     -------     -------
SUPPLEMENTAL DATA:
Average net assets of common shareholders (in thousands)    $243,074    $238,540     $219,740    $226,935    $236,810
Portfolio turnover                                                86%        164%         182%        210%        110%
Net assets of common shareholders, end of period 
   (in thousands)                                           $240,684    $242,547     $236,990    $201,343    $246,631
Preferred stock outstanding (in thousands)                  $130,000    $130,000     $130,000    $130,000    $130,000
Asset coverage per share of preferred stock, 
   end of period##                                          $ 71,285    $ 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.
 *** Actual  amount paid to common  shareholders  for the six months ended April
     30, 1997 was  $0.00335 per share,  and the actual amount paid  to preferred
     shareholders was $0.00108 per common share.
#    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 periods of less than one year are not annualized.
 ++  Annualized.
 +++ Ratios are calculated on the basis of income,  expenses and preferred stock
     dividends applicable to both the common and preferred stock relative to the
     average net assets of common shareholders.

The information above represents the unaudited operating  performance data 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  Municipal  Trust
POLICIES                      Trust Inc. (the "Trust") was organized in Maryland
                              on  November  19,  1992 as a  diversified, closed-
end management  investment company. The Trust had no transactions until February
16, 1993 when it sold 7,093  shares of common  stock for  $100,012 to  BlackRock
Financial Management,  Inc. (the "Adviser").  Investment operations commenced on
February 26, 1993.

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

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

SECURITIES  TRANSACTIONS  AND INVESTMENT  INCOME:  Securities  transactions  are
recorded  on the trade date.  Realized  gains and losses are  calculated  on the
identified cost basis.  Interest income is recorded on the accrual basis and the
Trust  amortizes  premium and accretes  original  issue  discount 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 have been deferred and are being
amortized  ratably  over a period  of  sixty  months  from  the  date the  Trust
commenced investment operations.

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

NOTE 2. AGREEMENTS            The Trust has an Investment     Advisory Agreement
                              with BlackRock  Financial  Management,  Inc., (the
                              "Adviser"),  a wholly-owned  corporate  subsidiary
of PNC Asset  Management  Group,  Inc.,  the  holding  company  for PNC's  asset
management   businesses   and  an   Administration   Agreement   with  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,   1997   aggregated
                              $317,934,596 and $315,419,511, respectively.

   The federal income tax basis of the Trust's investments at April 30, 1997 was
$362,467,483, and accordingly, net unrealized appreciation was $6,012,471 (gross
unrealized appreciation--$7,963,902, gross unrealized depreciation--$1,951,431).

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, 1997, the  Adviser
owned 7,093 shares.  As of April 30, 1997,  there were 5,200 shares of Preferred
Stock outstanding as follows: Series T7--2,600 and Series T28--2,600.

   Offering costs  ($1,046,346)  incurred in connection with the underwriting of
the Trust's  common stock have been charged to paid-in  capital in excess of par
of the common stock.

   The Trust may classify or reclassify any unissued shares of common stock into
one or more series of preferred stock. On 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.

   The underwriting discount ($1,950,000) and offering costs ($328,828) incurred
in  connection  with the Preferred  Stock  offering have been charged to paid-in
capital in excess of par of the common stock.

Dividends  on Series 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 4.99% during the six months ended April 30,
1997.

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

   The Preferred  Stock is redeemable at the option of the Trust, in whole or in
part, on any dividend  payment date at $25,000 per share plus any accumulated or
unpaid dividends whether or not declared. The Preferred Stock is also subject to
mandatory  redemption  at  $25,000  per  share  plus any  accumulated  or unpaid
dividends,  whether or not  declared,  if certain  requirements  relating to the
composition  of the  assets  and  liabilities  of the  Trust as set forth in the
Articles of Incorporation are not satisfied.

   The holders of  Preferred  Stock have voting  rights  equal to the holders of
common stock (one vote per share) and will vote  together with holders of shares
of common stock as a single class. However,  holders of Preferred Stock are also
entitled to elect two of the Trust's  directors.  In  addition,  the  Investment
Company Act of 1940  requires  that,  along with approval by  stockholders  that
might  otherwise be  required,  the approval of the holders of a majority of any
outstanding  preferred shares, voting separately as a class would be required to
(a) adopt any plan of  reorganization  that would adversely affect the preferred
shares, and (b) take any action requiring a vote of security holders, including,
among other  things,  changes in the Trust's  subclassification  as a closed-end
investment company or changes in its fundamental investment restrictions.

NOTE 5. DIVIDENDS             Subsequent  to  April  30,  1997, the   Board   of
AND DISTRIBUTIONS             Directors of the Trust declared  a  dividend  from
                              undistributed  earnings of  $0.065625  per  common
share payable May 30, 1997 to  shareholders of record on May 15, 1997.

   For the period May 1 through May 31,  1997  dividends  declared on  Preferred
Stock totalled  $391,187 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 April 15, 1997 to vote
      on the following matters: (1)To elect four Directors to serve as follows:

         DIRECTOR                           CLASS        TERM           EXPIRING
         -------                            -----        ----            -------
         Richard E.Cavanagh ...........       I          3 years           2000
         James Grosfeld ...............       I          3 years           2000
         James Clayburn LaForce, Jr. ..       I          3 years           2000
         Walter F. Mondale ............       II         3 years           2000

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

      (2)To ratify the selection of Deloitte & Touche LLP as independent  public
         accountants of the Trust for the fiscal year ending October 31, 1997.

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

                                        VOTES FOR   VOTES AGAINST    ABSTENTIONS
                                        ---------   -------------    -----------
         Richard E.Cavanagh ..........      3,342         0                  21
         James Grosfeld .............. 11,390,421         0              92,179
         James Clayburn LaForce, Jr. . 11,389,721         0              92,879
         Walter F. Mondale ........... 11,376,445         0             106,155
         Ratification of Deloitte & 
           Touche LLP ................ 11,350,222    25,489             106,888

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

WHAT CAN THE TRUST INVEST IN?

Under normal  conditions,  the Trust expects to continue to manage its assets so
that at least  80% of its  investments  are  rated  investment  grade  ("BBB" by
Standard & Poor's and "Baa" by Moody's  Investor  Services) and up to 20% of its
assets may instead be deemed to be of equivalent  credit quality by the Adviser.
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.

                                       14
<PAGE>

The Trust pays monthly  dividends  which are typically paid on the last business
day of the month. For shares held in the  shareholder's  name,  dividends may be
reinvested in additional  shares of the fund through the Trust's transfer agent,
State  Street  Bank  andTrust  Company.  Investors  who wish to hold shares in a
brokerage account should check with their financial advisor to determine whether
their brokerage firm offers dividend reinvestment services.

LEVERAGE CONSIDERATIONS IN THE TRUST

Leverage  increases  the duration (or price  sensitivity  of the net assets with
respect to changes  in  interest  rates) of the  Trust,  which can  improve  the
performance  of the 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>


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



<TABLE>
<CAPTION>
TAXABLE TRUSTS
- ---------------------------------------------------------------------------------------------------------------------------

                                                                                        STOCK               MATURITY
PERPETUAL TRUSTS                                                                        SYMBOL                DATE
                                                                                        ------              --------
<S>                                                                                     <C>                 <C>    
The BlackRock Income Trust Inc.                                                          BKT                    N/A
The BlackRock North American Government Income Trust Inc.                                BNA                    N/A

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



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

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

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

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



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

                                       17
<PAGE>

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

      BlackRock  Financial  Management  (BlackRock)  is a registered  investment
adviser which specializes in managing high quality fixed income securities, both
taxable and tax exempt.  BlackRock  currently manages over $48 billion of assets
across the government,  mortgage,  corporate and municipal sectors. These assets
are managed on behalf of many  individual  investors  in  twenty-one  closed-end
funds  traded on either the New York or American  stock  exchanges,  and several
open-end  funds  and on behalf of more  than 100  institutional  clients  in the
United States and  overseas.  

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

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

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

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


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

                                       18

<PAGE>





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) 688-0928

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

AUCTION AGENT
Bankers Trust Company
4 Albany Street
New York, NY 10006

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

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

   The accompanying  financial  statements as of April 30, 1997 were not audited
and, accordingly, no opinion is expressed on them.

   This report is for shareholder information. This is not a prospectus intended
for use in the purchase or sale of any securities.


                   THE BLACKROCK 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
                                                                   09247D-303

[RECYCLE LOGO]      Printed on recycled paper






THE BLACKROCK
INVESTMENT QUALITY
MUNICIPAL TRUST INC.
================================================================================
SEMI-ANNUAL REPORT
APRIL 30, 1997

                                   [GRAPHIC]




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