BLACKROCK INCOME TRUST INC
N-30D, 1998-07-02
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- --------------------------------------------------------------------------------
                        THE BLACKROCK INCOME 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  Income
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 market  developments 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  "BKT".  The
Trust's  investment  objective is to provide high current income consistent with
the  preservation  of  capital.  The Trust  seeks  its  objective  by  investing
primarily in mortgage-backed securities backed by U.S. Government agencies (such
as  Fannie  Mae,  Freddie  Mac or  Ginnie  Mae) and,  to a lesser  extent,  U.S.
Government   securities,    asset-backed   securities   and   privately   issued
mortgage-backed securities. At least 85% of the Trust's assets must be issued or
guaranteed  by the U.S.  government  or its  agencies or rated at least "AAA" by
Standard & Poor's or "Aaa" by Moody's (up to 5% can be unrated and deemed by the
Adviser to be of equivalent  credit  quality);  the remaining 15% of the Trust's
assets  must be rated at least  "AA" by  Standard & Poor's or "Aa" by Moody's at
time of purchase.

     The table below  summarizes the  performance of the Trust's stock price and
NAV over the period:


                              --------------------------------------------------
                               4/30/98  10/31/97  CHANGE    HIGH         LOW
- --------------------------------------------------------------------------------
STOCK PRICE                    $6.875   $6.875    0.00%     $7.250    $6.813
- --------------------------------------------------------------------------------
NET ASSET VALUE (NAV)          $8.01    $8.12    (1.36%)    $8.22     $8.01
- --------------------------------------------------------------------------------
10-YEAR U.S. TREASURY NOTE      5.67%    5.83%   (0.16%)     5.96%     5.36%
- --------------------------------------------------------------------------------

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.

                                       2
<PAGE>

     In light of declining  interest rates and faster  prepayment  speeds during
the period,  mortgages modestly underperformed the broader investment grade bond
market.  As measured by the Lehman Brothers  Mortgage Index,  mortgages posted a
3.48%  total  return  versus  3.58% for the  Lehman  Brothers  Aggregate  Index.
Mortgage  rates fell below the  critical 7%  threshold  for the first time since
January  1994,  causing  concerns  that  increased  refinancing  activity  would
negatively  impact the performance of mortgage  securities.  Declining  interest
rate  volatility  attracted  investors to the mortgage  market,  providing  some
support for mortgage securities. As much of the mortgage market has been brought
into a  "refinanceable"  position due to the recent  decline in interest  rates,
lower coupon securities have generally  outperformed  more  prepayment-sensitive
higher-coupon issues.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

      BlackRock actively manages the Trust's portfolio holdings  consistent with
BlackRock's  overall market outlook and the Trust's investment  objectives.  The
Trust is  managed  to  maintain  an  interest  rate  sensitivity  (or  duration)
resembling  that of the Salomon  Brothers  Mortgage  Index;  this means that the
portfolio's  NAV will change  similarly to the price of the Index given a change
in interest rates.  The following chart compares the Trust's current and October
31, 1997 asset composition:

- --------------------------------------------------------------------------------
COMPOSITION                                  APRIL 30, 1998    OCTOBER 31, 1997
- --------------------------------------------------------------------------------
U.S. Government Securities                         24%               15%
- --------------------------------------------------------------------------------
Adjustable & Inverse Floating Rate Mortgages       15%               20%
- --------------------------------------------------------------------------------
Agency Multiple Class Mortgage Pass-Throughs       14%               14%
- --------------------------------------------------------------------------------
Interest Only Mortgage-Backed Securities           10%               12%
- --------------------------------------------------------------------------------
Principal Only Mortgage-Backed Securities          10%               13%
- --------------------------------------------------------------------------------
FHA Project Loans                                   9%                9%
- --------------------------------------------------------------------------------
Mortgage Pass-Throughs                              8%                8%
- --------------------------------------------------------------------------------
Non-Agency Multiple Class Mortgage Pass-Throughs    4%                4%
- --------------------------------------------------------------------------------
Commercial Mortgage-Backed Securities               4%                3%
- --------------------------------------------------------------------------------
Asset Backed Securities                             1%                1%
- --------------------------------------------------------------------------------
CMO RESIDUALS                                       1%                1%
- --------------------------------------------------------------------------------


      The Trust has emphasized prepayment protection over the past six months as
interest  rates have trended  lower.  The  likelihood of faster  prepayments  on
mortgage securities led the Trust to be a net seller of mortgage securities most
susceptible to prepayments.  Specifically,  the Trust's non-prepayment protected
IO (Interest-Only mortgage security) holdings were reduced, as that sector began
to weaken as  interest  rates fell.  The Trust  purchased  Treasuries  with cash
raised from mortgage sales, including 30-year TIPS (Treasury Inflation Protected
Securities), which we believe offered attractive inflation adjusted yields.


                                       3
<PAGE>

      We look  forward to  continuing  to manage  the Trust to benefit  from the
opportunities  available to investors in the fixed income  markets as well as to
maintain the Trust's ability to meet its investment objectives. We thank you for
your  investment in the BlackRock  Income Trust Inc. Please feel free to contact
our marketing  center at (800)  227-7BFM  (7236) if you have specific  questions
which were not addressed in this report.


Sincerely





/s/ Robert S. Kapito                        /s/ Michael P. Lustig
- -----------------------------------         -----------------------------------
Robert S. Kapito                            Michael P. Lustig
Vice Chairman and Portfolio Manager         Director and Portfolio Manager
BlackRock Financial Management, Inc.        BlackRock Financial Management, Inc.



- --------------------------------------------------------------------------------
                         THE BLACKROCK INCOME TRUST INC.
- --------------------------------------------------------------------------------
Symbol on New York Stock Exchange:                                   BKT
- --------------------------------------------------------------------------------
Initial Offering Date:                                          July 22, 1988
- --------------------------------------------------------------------------------
Closing Stock Price as of April 30, 1998:                          $6.875
- --------------------------------------------------------------------------------
Net Asset Value as of April 30, 1998:                               $8.01
- --------------------------------------------------------------------------------
Yield on Closing Stock Price as of 4/30/98 ($6.875) 1:              8.18%
- --------------------------------------------------------------------------------
Current Monthly Distribution per Share 2:                         $0.046875
- --------------------------------------------------------------------------------
Current Annualized Distribution per Share 2:                       $0.5625
- --------------------------------------------------------------------------------

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



                                       4
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
PORTFOLIO OF INVESTMENTS
APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)       DESCRIPTION                                       (NOTE 1)
- --------------------------------------------------------------------------------
               LONG-TERM INVESTMENTS--148.2%
               MORTGAGE PASS-THROUGHS--22.3%
               Federal Home Loan Mortgage Corp.,
     $ 4,733+   7.50%, 7/01/07 - 2/01/23 .......................    $  4,839,710
       1,103+   8.00%, 11/01/15 ................................       1,152,163
       1,811    8.50%, 3/01/06 - 3/01/08, 15 year ..............       1,889,436
         632    8.50%, 6/01/11 .................................         660,896
       3,160    9.00%, 9/01/20 .................................       3,390,949
               Federal Housing Administration,
       4,241    Brookville, 7.50%, 8/01/28 .....................       4,416,107
       3,725    Country Estates, 8.375%, 1/01/35 ...............       4,008,663
               GMAC,
       6,184     Series 33, 7.43%, 9/01/21 ......................      6,344,011
       2,145     Series 46, 7.43%, 1/01/22 ......................      2,214,114
         885     Series 48, 7.43%, 6/01/22 ......................        909,973
         313     Series 51, 7.43%, 2/01/23 ......................        322,300
       7,643     Series 56, 7.43%, 11/01/22 .....................      7,876,262
       1,258   Merrill,
                 Series 54, 7.43%, 5/15/23 ......................      1,300,690
       1,251    Middlesex, 8.625%, 9/01/34 .....................       1,357,800
       4,567    Parkside, 7.30%, 2/01/13 .......................       4,676,386
       1,050    Reilly, Series 41, 8.28%, 3/01/20 ..............       1,114,308
       2,858    Tuttle Grove, 7.25%, 10/01/35 ..................       2,933,781
               USGI,
       4,314     Polaris 982, 7.43%, 11/01/21 ...................      4,442,084
         919     Series 87, 7.43%, 12/01/22 .....................        953,684
       4,839     Series 99, 7.43%, 10/01/23 .....................      5,021,805
       2,736     Series 1003, 7.43%, 3/01/24 ....................      2,794,514
       2,736     Series 6302, 7.43%, 12/01/21 ...................      2,824,776
       6,990     Yorkville, Series 6094,
                  7.43%, 6/01/21 ................................      7,206,660
       3,584     Waterford, 8.625%, 7/25/27 .....................      3,890,779
               Federal National Mortgage Association,
       1,132+    7.00%, 11/01/08 ................................      1,153,180
       5,746     7.50%, 11/01/14 - 9/01/23, 18 year
                  Multifamily ...................................      5,804,253
       5,421+    8.00%, 5/01/08 - 5/01/22 .......................      5,634,775
         721     9.317%, 6/01/19, 10 year Multifamily ...........        811,619
         586     9.484%, 7/01/19, Multifamily ...................        620,367
       1,444     9.497%, 6/01/24, Multifamily ...................      1,524,172
         135     9.50%, 1/01/19 - 6/01/20 .......................        143,597
               Government National Mortgage
               Association,
         601    7.00%, 10/15/17 ................................         607,668
      17,660    7.50%, 8/15/21 - 12/15/23 ......................      18,141,171
          41    8.50%, 5/15/01 - 2/15/17 .......................          42,834
         856    9.00%, 6/15/18 - 9/15/21 .......................         915,688
          13    9.50%, 7/15/16 .................................          14,362
                                                                    ------------
                                                                     111,955,537
                                                                    ------------
               MULTIPLE CLASS MORTGAGE
               PASS-THROUGHS--51.6%
AAA    2,100@@Citicorp Mortgage Securities Inc.,
               Series 1994-9, Class A-4, 6/25/09 ................      2,026,563
AAA    1,098  Collateralized  Mortgage  Obligation  Trust, 
               Series 13, Class Q, 1/20/03 ......................      1,127,893
              Countrywide Funding Corp., Mortgage
               Certificates,
AAA    3,394     Series 1993-10, Class A-8,
                  1/25/24, (ARM) ................................      3,189,893
AAA    6,202     Series 1994-9, Class A-16,
                  5/25/24, (ARM) ................................      5,457,333
AAA   17,000   DLJ Mortgage Acceptance Corp.,
                  Series 1998-2, Class A-1, 4/25/28 .............     16,830,000
               Federal Home Loan Mortgage
                 Corp., Multiclass Mortgage
                 Participation Certificates,
      27,426+    Series G-13, Class 13-PP,
                  5/25/21, (I) ..................................      7,233,720
       2,544     Series G-24, Class G24-SG,
                  11/25/23, (ARM) ...............................      2,127,844
       7,500+    Series 1104, Class 1104-L,
                  6/15/21 .......................................      8,067,375
       1,742     Series 1347, Class 1347-HC,
                  12/15/21 ......................................      1,578,130
       2,000     Series 1523, Class 1523-SA,
                  6/15/23, (ARM) ................................      1,414,420
       1,060     Series 1534, Class 1534-NE,
                  6/15/23, (ARM) ................................      1,033,702
       4,257     Series 1541, Class 1541-T,
                  7/15/23 .......................................      4,146,063
       1,912     Series 1559, Class 1559- WA,
                  7/15/22 .......................................      1,892,539
      12,305+    Series 1584, Class 1584-FB,
                  9/15/23 .......................................     12,492,751
       1,494     Series 1596, Class 1596-SB,
                  12/15/12, (ARM) ...............................      1,387,669
       3,892     Series 1608, Class 1608-SD,
                  6/15/23, (ARM) ................................      3,670,222
         866     Series 1609, Class 1609-KA,
                  11/15/23 ......................................        860,451
       1,744     Series 1611, Class 1611-PD,
                  11/15/23, (ARM) ...............................      1,128,994
         500     Series 1625, Class 1625-SL,
                  12/15/08, (ARM) ...............................        510,000
       6,543+    Series 1627, Class 1627-S,
                  12/15/23, (ARM) ...............................      5,266,984
       5,038     Series 1627, Class 1627-SC,
                  12/15/23, (ARM) ...............................      3,663,536
       3,084     Series 1629, Class 1629-OD,
                  12/15/23, (ARM) ...............................      2,181,726

       See Notes to Financial Statements.

                                       5
<PAGE>
- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)       DESCRIPTION                                       (NOTE 1)
- --------------------------------------------------------------------------------
     $ 2,915     Series 1686, Class 1686-A,
                  2/15/24 .......................................     $2,679,232
         687     Series 1720, Class 1720-PK,
                  1/15/24, (I) ..................................        245,805
       1,225     Series 1750, Class 1750-PC,
                  3/15/24, (P) ..................................      1,003,851
       4,564     Series 1882, Class 1882-PJ,
                  4/15/22, (I) ..................................        936,490
      72,489     Series 1914, Class 1914-PC,
                  12/15/11, (I) .................................      1,624,486
      11,214     Series 1992, Class 1992-PV,
                  9/15/27, (I) ..................................      4,471,721
       9,955     Series 2037, Class 2037-IB,
                  12/15/26 ......................................      2,484,649
               Federal National Mortgage Association,
                 REMIC Pass-Through Certificates,
       3,235     Trust 1988-16, Class 16-B,
                  6/25/18 .......................................      3,461,761
       5,488@    Trust 1990-12, Class 12-G,
                  2/25/20 .......................................      5,120,798
      12,451@@   Trust 1991-15, Class 15-S,
                  6/25/21, (ARM) ................................      2,160,472
       3,029@@   Trust 1991-38, Class 38-F,
                  4/25/21, (ARM) ................................      3,070,466
       2,564     Trust 1991-38, Class 38-SA,
                  4/25/21, (ARM) ................................      2,588,762
       2,477     Trust 1991-87, Class 87-S,
                  8/25/21, (ARM) ................................      2,633,264
       1,077     Trust 1992-12, Class 12-C,
                  2/25/22, (I) ..................................        332,013
       6,000     Trust 1992-43, Class 43-E,
                  4/25/22, (ARM) ................................      6,177,120
       3,874     Trust 1992-187, Class 187-JA,
                  10/25/06, (I) .................................        335,958
      10,084     Trust 1992-200, Class 200-K,
                  11/25/21, (I) .................................      1,261,767
         768     Trust 1993-27, Class 27-SB,
                  8/25/23, (ARM) ................................        631,738
         551     Trust 1993-29 Class 29-SP,
                  3/25/23, (ARM) ................................        442,307
       1,280     Trust 1993-50, Class 50-SH,
                  1/25/23, (ARM) ................................      1,206,585
       2,768+    Trust 1993-53, Class 53-M,
                  4/25/23 .......................................      2,719,428
       2,137     Trust 1993-82, Class 82-SB,
                  5/25/23, (ARM) ................................      1,664,796
       1,086     Trust 1993-87, Class 87-L,
                  6/25/23 .......................................      1,081,263
         879     Trust 1993-116, Class 116-SB,
                  7/25/23, (ARM) ................................        755,852
       2,597     Trust 1993-129, Class 129-SE,
                  8/25/08, (ARM) ................................      2,534,186
         817     Trust 1993-167, Class 167-SA,
                  9/25/23, (ARM) ................................        801,091
       6,000@@   Trust 1993-169, Class 169-SC,
                  3/25/23, (ARM) ................................      4,460,520
       5,763+    Trust 1993-178, Class 178-A,
                  9/25/23 .......................................      5,650,332
       2,776     Trust 1993-179, Class 179-SC,
                  10/25/23, (ARM) ...............................      3,167,036
       2,871     Trust 1993-179, Class 179-VC,
                  10/25/21, (ARM) ...............................      2,060,092
      16,000     Trust 1993-201, Class-JC,
                  5/25/19, (I) ..................................      2,910,720
       1,576     Trust 1993-223, Class 223-SJ,
                  12/25/23, (ARM) ...............................      1,187,928
       2,993     Trust 1993-224, Class 224-S,
                  11/25/23, (ARM) ...............................      2,515,138
       1,908     Trust 1993-224, Class 224-SH,
                  11/25/23, (ARM) ...............................      1,639,467
       2,562     Trust 1993-247, Class 247-SN,
                  12/25/23, (ARM) ...............................      3,101,638
       5,643     Trust 1993-248, Class 248-FB,
                  9/25/23, (ARM) ................................      5,182,309
       3,487     Trust 1993-256, Class 256-F,
                  11/25/23, (ARM) ...............................      3,214,479
       3,777     Trust 1994-14, Class 14-S,
                  10/25/23, (ARM) ...............................      2,451,129
       4,802     Trust 1994-19, Class 19-SB,
                  1/25/24, (ARM) ................................      2,955,214
         387     Trust 1994-27, Class 27-SE,
                  3/25/23, (ARM) ................................        422,323
      14,300+    Trust 1996-14, Class 14-AB,
                  8/25/23, (P) ..................................      6,193,688
       6,797+    Trust 1996-14, Class 14-M,
                  10/25/21, (P) .................................      5,822,124
      25,000     Trust 1997-50, Class 50-HK,
                  8/25/27, (I) ..................................      9,234,375
      51,000     Trust 1997-90, Class 90-M,
                  1/25/28, (I) ..................................     20,639,063
      13,724     Trust 1998-12, Class 12-PL,
                  7/18/19, (I) ..................................      2,581,783
       7,378     Trust 1998-25, Class 25-PG,
                  3/18/22, (ARM) ................................      1,715,452
      18,301     Trust 1998-26, Class 26-PK,
                  12/18/21, (I) .................................      3,431,466
      18,154     Trust 1998-27, Class 27-L,
                  3/25/20, (I) ..................................      2,337,328
AAA    8,598   G. E. Capital Mortgage Services
                 Inc., REMIC Certificates 94-7,
                 Class A-17, 2/25/09, (ARM) .....................      7,474,823
AAA    8,870   PNC Mortgage Corp., Mortgage
                 Pass-Through Certificates,
                 Series 1997-6 Class-A2,
                  7/25/27, (ARM) ................................      8,861,349
               Prudential Home Mortgage
                 Securities Co., Mortgage
                 Pass-Through Certificates,
Aaa      743     Series 1993-43, Class A-16,
                  10/25/23, (ARM) ...............................        673,252
Aaa    2,500     Series 1993-48, Class A-8,
                  12/25/08, (ARM) ...............................      2,416,625

       See Notes to Financial Statements.

                                       6
<PAGE>
- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)       DESCRIPTION                                       (NOTE 1)
- --------------------------------------------------------------------------------
AAA  $ 7,349   Salomon Capital Access Corp., CMO,
                 Series 1986-1, Class C, 9/01/15 ................   $  7,556,048
                                                                    ------------
                                                                     259,569,370
                                                                    ------------
               COMMERCIAL MORTGAGE-BACKED
               SECURITIES--6.0%
AAA    3,162   Asset Securitization Corp.,
                 Series 1997-D5,
                 Class PS-1, 2/14/41, (I/O) .....................        340,389
AAA   44,113** Credit Suisse First Boston Mortgage,
                 Series 1997, Class C-1,
                 6/20/29, (I/O) .................................      4,838,608
AAA   48,225   GMAC Commercial Mortgage
                 Corp., Series 97-C1, Class-X,
                 7/15/27, (I/O) .................................      4,596,452
AAA  140,000   Kidder Peabody Acceptance Corp.,
                 Series 1994-C1,
                 2/01/01, (I/O) .................................          1,400
AAA    6,000   ML Mortgage Investments,
                 Series 1996-C1, Class A-3,
                 7.42%, 4/25/28 .................................      6,313,053
AAA   20,307   Morgan Stanley Capital I Inc.,
                 Series 1997, Class HF-1,
                 6/15/17, (I/O) .................................      1,786,416
AAA   10,250** NYC Mortgage Loan Trust,
                 Series 1996, Class A-2,
                 6.75%, 6/25/11 .................................     10,451,797
AA     2,000   PaineWebber Mortgage Acceptance
                 Corp. IV, Series1995-M1,
                 Class B, 6.95%, 1/15/07 ........................      2,028,671
                                                                      ----------
                                                                      30,356,786
                                                                      ----------
               ASSET-BACKED SECURITIES--1.9%
AAA    4,826   Chase Manhattan Grantor Trust,
                 Series 1996-B, Class A,
                 6.61%, 9/15/02 .................................      4,863,745
AAA    4,581   Money Store Trust,
                 Series 1998-A, Class MH-2,
                 7.23%, 5/15/30 .................................      4,568,116
                                                                      ----------
                                                                       9,431,861
                                                                      ----------
               STRIPPED MORTGAGE-BACKED
               SECURITIES--30.2%
Aaa      928   Chase Mortgage Finance Corp.,
                 Mortgage Pass-Through Certificates,
                 Series 1994-A, Class AP,
                 1/25/10, (P/O) ..................................       715,535
AAA    1,022   Collateralized Mortgage Obligation
                 Trust, Series 29, Class A, 5/23/17,
                 (P/O) ...........................................       804,563
               Drexel Burnham Lambert,
AAA      362     Trust K, Class K-1A, 9/23/17, (P/O) .............       313,889
AAA    3,911     Trust V, Class V-1, 9/01/18, (P/O) ..............     3,113,896
               Federal Home Loan Mortgage Corp.,
       2,249   Series 273, Class A-10,
                 11/15/28, (P/O) .................................     1,427,366
       3,826     Series 1238, Class 1238-J,
                  1/15/07, (I/O) .................................       739,187
      25,209     Series 1353, Class 1353-S,
                  8/15/07, (I/O) .................................     2,682,230
         676     Series 1418, Class 1418-M,
                  11/15/22, (P/O) ................................       268,631
         797     Series 1473, Class 1473-JA,
                  2/15/05, (I/O) .................................        40,259
      12,000     Series 1506, Class 1506-L,
                  3/15/22, (I/O) .................................     2,258,040
      12,915     Series 1632, Class 1632-S,
                  4/15/23, (I/O) .................................       416,649
      32,000     Series 1809, Class 1809-SC,
                  12/15/23, (I/O) ................................     3,280,000
      14,069+    Series 1828, Class 1828-A,
                  5/15/24, (P/O) .................................    10,305,505
      17,850     Series 1850, Class 1850-SA,
                  2/15/24, (I/O) .................................     2,727,646
       6,687     Series 1857, Class 1857-PB,
                  12/15/08, (P/O) ................................     5,800,843
       5,000     Series 1900, Class 1900-SV,
                  8/15/08, (I/O) .................................       870,300
       4,828     Series 1917, Class 1917-AS,
                  5/15/08, (I/O) .................................     1,074,234
      17,938     Series 1946, Class 1946-SG,
                  3/15/24, (I/O) .................................     2,197,448
      40,000     Series 1965, Class 1965-SA,
                  3/15/24, (l/O) .................................     5,662,500
     120,299     Series 1968, Class 1968-S,
                  10/15/26, (I/O) ................................     6,766,795
      15,106     Series 2002, Class 2002-HJ,
                  10/15/08, (I/O) ................................     2,317,844
       5,500     Series 2009, Class 2009-HJ,
                  10/15/22, (P/O) ................................     3,226,094
               Federal Housing Aministration,
      31,678+    Series 184, Class 184-IO,
                  12/01/26, (l/O) ................................     8,355,058
               Federal National Mortgage Association,
       3,819     Trust A, Class A-2,
                  8/01/10, (I/O) .................................       704,931
       1,250     Trust 50, Class 50-G,
                  12/25/21, (I/O) ................................       451,730
       5,980     Trust 225, Class 1,
                  2/01/23, (P/O) .................................     4,836,773
       1,559+    Trust 267, Class 1,
                  10/01/24, (P/O) ................................     1,309,371
       6,134     Trust 279, Class 1,
                  7/01/26, (P/O) .................................     5,167,721
       1,065     Trust 1991-7, Class-J,
                  2/25/21, (P/O) .................................       834,459
       3,808     Trust 1992-34, Class 34-A,
                  4/25/22, (I/O) .................................     1,101,350
      16,240     Trust 1992-60, Class 60-SB,
                  10/25/22, (I/O) ................................       625,241
       1,896     Trust 1992-68, Class 68-K,
                  10/25/05, (I/O) ................................       151,661
      37,140     Trust 1992-216, Class 216-S,
                  12/25/22, (I/O) ................................     4,740,179

       See Notes to Financial Statements.

                                       7
<PAGE>
- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)       DESCRIPTION                                       (NOTE 1)
- --------------------------------------------------------------------------------
     $ 1,428     Trust 1993-2, Class 2-KB,
                  1/25/23, (I/O) .................................  $    617,680
      62,603     Trust 1993-82, Class 82-SB,
                  5/25/23, (I/O) .................................     6,705,372
       2,466     Trust 1993-113, Class 113-B,
                  7/25/23, (P/O) .................................     1,906,260
      12,364+    Trust 1993-213, Class 213-H,
                  9/25/23, (P/O) .................................    10,935,310
       3,210     Trust 1994-24, Class 24-D,
                  11/25/23, (P/O) ................................     2,808,313
       3,960     Trust 1994-57, Class 57-C,
                  1/25/24, (P/O) .................................     3,560,602
      23,000     Trust 1994-77, Class 77- SB,
                  4/25/24, (I/O) .................................     2,825,320
       2,955     Trust 1994-94, Class 94-C,
                  8/25/23, (P/O) .................................     2,517,062
      13,853     Trust 1995-26, Class 26-SW,
                  2/25/24, (I/O) .................................     2,437,317
       2,151     Trust 1996-5, Class 5-PV,
                  11/25/23, (P/O) ................................     1,896,851
       9,963     Trust 1996-38, Class 38-E,
                  8/25/23, (P/O) .................................     5,899,964
       2,572     Trust 1996-56, Class 56-E,
                  4/25/23, (P/O) .................................     2,045,002
      12,371     Trust 1996-68, Class 68-SC,
                  1/25/24, (I/O) .................................     1,470,976
      85,756     Trust 1997-37, Class 37-SE,
                  10/25/22, (I/O) ................................     2,036,716
      35,476     Trust 1997-65, Class 65-SB,
                  3/25/24, (I/O) .................................     1,940,111
      27,000     Trust 1997-65, Class 65-SG,
                  6/25/23, (I/O) .................................     3,915,000
      11,139     Trust 1997-76, Class 76-SP,
                  12/25/23, (I/O) ................................     1,924,958
       5,294     Trust 1997-85, Class 85-EL,
                  7/25/23, (P/O) .................................     3,751,874
       2,780     Trust 1997-85, Class 85-LE,
                  10/25/23, (P/O) ................................     2,297,387
AAA    1,070   First Boston Mortgage Securities
                 Corp.,
                 Series 1987-C, Class Z,
                  4/25/17, (I/O) .................................       339,832
               Housing Security Inc.,
AAA      377     Series 1992-EB, Class B-8,
                  9/25/22, (P/O) .................................       278,760
AAA      578     Series 1993-D, Class D-8,
                  6/25/23, (P/O) .................................       387,195
               Kidder Peabody Acceptance Corp.,
                 Series B, Class B-1,
AAA    2,739      4/22/18, (P/O) .................................     2,323,544
AAA    1,466     Series B, Class B-2,
                  4/22/18, (I/O) .................................       382,844
AAA    2,852   Structured Asset Securities Corp.,
                 Series 1991-2, Class GA,
                   12/20/21, (I/O) ...............................       780,800
AAA      834   Structured Mortgage Asset Trust,
                 Series 1993-3C, Class CX,
                 4/25/24, (P/O) ..................................       544,771
AAA      363   Prudential Securities, Inc.,
                 Trust 15, Class 1G,
                 5/20/21, (I/O) ..................................       385,453
                                                                    ------------
                                                                     152,203,202
                                                                    ------------
               U.S GOVERNMENT AND
               AGENCY SECURITIES--35.5%
               Overseas Private Investment Corp.,
         200     6.27%, 5/29/12 ...................................      197,875
         400     6.84%, 5/29/12 ...................................      405,000
               Small Business Administration,
       4,475   Series 1996-20E,
                 7.60%, 5/01/16 ...................................    4,752,872
       3,984   Series 1996-20G,
                 7.70%, 7/01/16 ...................................    4,255,387
       3,765   Series 1996-20H,
                 7.25%, 8/01/16 ...................................    3,938,302
               Series 1996-20K,
       6,710     6.95%, 11/01/16 ..................................    6,909,903
       3,777     7.55%, 6/01/16 ...................................    4,004,312
       2,882   Series 1997-20C,
                 7.15%, 3/01/17 ...................................    3,000,860
       5,490   Series 1998-10A,
                 6.12%, 2/01/08 ...................................    5,424,381
     115,107+  United States Treasury Bonds,
                 3.625%, 4/15/28 (TIPS) ...........................  114,387,531
      31,300++ United States Treasury Notes,
                 5.75%, 11/30/02 ..................................   31,378,250
                                                                    ------------
                                                                     178,654,673
                                                                    ------------
               COLLATERALIZED MORTGAGE
               OBLIGATION RESIDUALS***--0.7%
AAA    5,435   American Housing Trust III,
                 Senior Mortgage Pass-
                 Through Certificates, Series 1,
                 Class 4, (REMIC) **, 3/25/19 .....................      845,915
AAA      304   American Housing Trust VII,
                 Senior Mortgage Pass-Through
                 Certificates, Series A, Class R,
                 (REMIC), 11/25/20 ................................    2,142,250
AAA       25   Collateralized Mortgage Obligation,
                 Trust 13**, 1/20/03 ..............................      210,687
AAA       45   FBC Mortgage Securities Trust 16,
                 CMO, Series A**, 7/01/17, (ARM) ..................      289,420
AAA       43   PaineWebber Trust, Series N,
                 Class 7, (REMIC), 1/01/19 ........................      202,826
                                                                    ------------
                                                                       3,691,098
                                                                    ------------
               Total Long-Term Investments
                 (cost $714,624,871) ..............................  745,862,527
                                                                    ------------
See Notes to Financial Statements.
                                       8
<PAGE>

- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
        (000)       DESCRIPTION                                       (NOTE 1)
- --------------------------------------------------------------------------------

               SHORT-TERM INVESTMENTS--1.0%
               REPURCHASE AGREEMENT--0.0%
      $  140     State Street Bank & Trust Co.,
                  5.20%, dated 4/30/98,
                  due 5/1/98 in the amount of
                   $140,020 (cost $140,000
                  collateralized by $140,000
                  U.S. Treasury Note, 6.625% due
                  7/31/01, value including
                  accrued interest--$143,220)$ .................... $    140,000
                                                                    ------------
 CONTRACTS #
 -----------
               CALL OPTION PURCHASED--0.7%
     150,000     Interest Rate Swap, 6.20% over
                  3 month LIBOR, expires 8/13/99
                  (cost $2,238,750) ...............................    3,532,500
                                                                    ------------
               PUT OPTION PURCHASED--0.3%
     150,000     Interest Rate Swap, 7.25% over
                  3 month LIBOR, expires 5/12/00
                  (cost $6,795,000) ...............................    1,358,850
                                                                    ------------
               Total Short-Term Investments
                 (cost $9,173,750) ................................    5,031,350
                                                                    ------------
               Total investments before
                 investments sold short--149.2%
                 (cost $723,798,621) .............................. $750,893,877

               INVESTMENTS SOLD SHORT--(5.0%)
   $ (25,000)  United States Treasury Bonds,
                 6.125%, 11/25/27
                 (proceeds $25,140,625) ..........................  (25,140,625)
                                                                    ------------
               Total investments net of short
                 sales--144.2%
                 (cost $698,657,996) ..............................  725,753,252
               Liabilities in excess of other
                 assets--(44.2%) ..................................(222,308,696)
                                                                    ------------
               NET ASSETS--100% ................................... $503,444,556
                                                                    ============
- ----------------------
     * Using the higher of Standard & Poor's or Moody's rating.
    ** Private placements restricted as to resale.
   *** Illiquid securities representing .5% of portfolio assets.
     # One contract equals 100,000 face value.
     + Partial  principal  amount pledged as collateral  for reverse  repurchase
       agreements.  
    ++ Entire  principal  amount  pledged as collateral for reverse
       repurchase agreements.
     @ Partial principal amount pledged as collateral for futures
       transactions.
    @@ Entire principal amount pledged as collateral for futures
       transactions.

- --------------------------------------------------------------------------------
                              KEY TO ABBREVIATIONS
      ARM   --  Adjustable Rate Mortgage.
      CMO   --  Collateralized Mortgage Obligation.
      I     --  Denotes a CMO with Interest only characteristics.
      I/O   --  Interest only. LIBOR -- London InterBank Offer Rate.
      P     --  Denotes a CMO with Principal only characteristics.
      P/O   --  Principal only.
      REMIC --  Real Estate Mortgage Investment Conduit.
      TIPS  --  Treasury Inflation Protection Securities.
- --------------------------------------------------------------------------------

See Notes to Financial Statements.

                                       9
<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
ASSETS
Investments, at value (cost $723,798,621) (Note 1) .........       $750,893,877
Cash .......................................................            197,622
Deposit with brokers as collateral for investments
  sold short (Note 1) ......................................         25,140,625
Interest receivable ........................................          6,163,699
Interest rate caps, at value
  (amortized cost $9,282,691) (Notes 1 & 3) ................          2,731,443


 Receivable for investments sold ...........................            228,429
                                                                   ------------
                                                                    785,355,695
                                                                   ------------

LIABILITIES
Reverse repurchase agreements (Note 4) .....................        229,691,000
Investment sold short, at value
  (proceeds $25,140,625) (Note 1) ..........................         25,140,625
Payable for investments purchased ..........................         20,541,027
Due to broker-variation margin .............................          3,485,202
Interest payable ...........................................          1,821,914
Unrealized depreciation on interest rate swaps
  (Note 1 & 3) .............................................            566,539
Investment advisory fee payable (Note 2) ...................            289,970
Administration fee payable (Note 2) ........................             83,318
Other accrued expenses .....................................            291,544
                                                                   ------------
                                                                    281,911,139
                                                                   ------------
NET ASSETS .................................................       $503,444,556
                                                                   ============
Net assets were comprised of:
  Common stock, at par (Note 5) ............................       $    628,499
  Paid-in capital in excess of par .........................        563,355,769
                                                                   ------------
                                                                    563,984,268
  Undistributed net investment income ......................            278,006
  Accumulated net realized losses ..........................        (80,125,400)
  Net unrealized appreciation ..............................         19,307,682
                                                                   ------------
  Net assets, April 30, 1998 ...............................       $503,444,556
                                                                   ============
NET ASSET VALUE PER SHARE:
  ($503,444,556 / 62,849,878 shares of
  common stock issued and outstanding) .....................              $8.01
                                                                          =====

- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
NET INVESTMENT INCOME
Income
  Interest (net of premium amortization of $3,809,751
  and interest expense of $5,387,814) ........................      $22,144,567
                                                                    -----------

Expenses
  Investment advisory ........................................        1,653,785
  Administration .............................................          508,857
  Custodian ..................................................           91,000
  Transfer agent .............................................           68,000
  Reports to shareholders ....................................           55,000
  Directors ..................................................           43,000
  Audit ......................................................           36,000
  Legal ......................................................            7,000
  Miscellaneous ..............................................           97,884
                                                                    -----------
    Total operating expenses .................................        2,560,526
                                                                    -----------
  Net investment income ......................................       19,584,041
                                                                    -----------


REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS (NOTE 3)
Net realized gain (loss) on:
  Investments ................................................       14,542,493
  Options ....................................................       (1,974,219)
  Futures ....................................................       (8,186,526)
  Short sales ................................................       (6,722,950)
                                                                    -----------
                                                                     (2,341,202)
                                                                    -----------
Net change in unrealized appreciation (depreciation) on:
  Investments ................................................       (8,740,457)
  Options ....................................................        2,830,500
  Interest rate caps .........................................       (1,411,931)
  Futures ....................................................          341,388
  Short sales ................................................          628,781
                                                                    -----------
                                                                     (6,351,719)
                                                                    -----------
  Net loss on investments ....................................       (8,692,921)
                                                                    -----------

NET INCREASE IN NET ASSETS
RESULTING FROM OPERATIONS ....................................      $10,891,120
                                                                    ===========

See Notes to Financial Statements.

                                       10
<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
STATEMENT OF CASH FLOWS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
INCREASE (DECREASE) IN CASH 
Cash flows provided by operating activities:
  Interest received .............................                $   30,863,760
  Operating expenses paid .......................                    (2,554,226)
  Interest expense paid .........................                    (4,610,194)
  Purchase of short-term portfolio investments
    including options, net ......................                    (7,871,344)
  Purchase of long-term portfolio investments ...                (1,185,949,818)
  Proceeds from disposition of long-term
    portfolio investments .......................                 1,194,544,760
  Variation margin on futures ...................                    (7,524,398)
                                                                 ---------------
  Net cash flows provided by operating activities                    16,898,540
                                                                 ---------------
Cash flows used for financing activities:
  Increase in reverse repurchase agreements .....                     1,160,800
  Cash dividends paid ...........................                   (17,907,211)
                                                                 ---------------
  Net cash flows used for financing activities ..                   (16,746,411)
                                                                 ---------------
Net increase in cash ............................                       152,129
Cash at beginning of period .....................                        45,493
                                                                 ---------------
Cash at end of period ...........................                $      197,622
                                                                 ===============

RECONCILIATION OF NET INCREASE IN NET
ASSETS TO NET CASH PROVIDED BY
OPERATING ACTIVITIES
Net increase in net assets resulting from
  operations ....................................                $   10,891,120
                                                                 ---------------
Increase in investments .........................                   (35,572,807)
Increase in interest receivable .................                      (478,372)
Decrease in receivable for investments sold .....                    62,699,397
Increase in variation margin payable ............                     2,903,186
Net realized losses .............................                     2,341,197
Decrease in unrealized appreciation .............                     6,351,719
Decrease in depreciation of forward swap ........                       (24,000)
Decrease in options written .....................                    (3,901,500)
Decrease in payable for investments sold short ..                      (624,875)
Decrease in payable for investments purchased ...                   (31,717,002)
Increase in interest payable ....................                     1,484,108
Decrease in deposits with brokers for                             
  investments sold short ........................                       796,875
Decrease in interest rate caps ..................                     2,449,677
Decrease in accrued expenses and other                            
  liabilities ...................................                      (700,183)
                                                                 ---------------
  Total adjustments .............................                     6,007,420
                                                                 ---------------
Net cash provided by operating activities .......                $   16,898,540
                                                                 ===============


- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
STATEMENTS OF CHANGES
IN NET ASSETS (UNAUDITED)
- --------------------------------------------------------------------------------
INCREASE (DECREASE)
IN NET ASSETS


                                                Six Months            Year
                                                  Ended              Ended
                                              April 30, 1998    October 31, 1997
                                              --------------    ----------------
Operations:

  Net investment income ..................      $ 19,584,041       $ 36,244,955

  Net realized gain (loss) on
    investments, futures,
    short sales, interest rate caps
    and options ..........................        (2,341,202)        10,941,155

  Net change in net unrealized
    appreciation (depreciation)
    on investments, futures,
    short sales, interest rate
    caps and options .....................        (6,351,719)        20,310,564
                                                ------------       ------------

  Net increase in
    net assets resulting from
    operations ...........................        10,891,120         67,496,674

Dividends from net investment
  income .................................       (17,676,122)       (35,352,309)
                                                ------------       ------------

  Total increase (decrease) ..............        (6,785,002)        32,144,365



NET ASSETS
  Beginning of period ....................       510,229,558        478,085,193
                                                ------------       ------------

  End of period ..........................      $503,444,556       $510,229,558
                                                ============       ============

See Notes to Financial Statements.

                                       11
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                            SIX MONTHS                       YEAR ENDED OCTOBER 31,
                                               ENDED     --------------------------------------------------------------
                                          APRIL 30, 1998  1997         1996          1995          1994          1993
                                          --------------  ----         ----          ----         ----           ----
<S>                                            <C>        <C>          <C>          <C>            <C>           <C>   
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period .......   $ 8.12     $ 7.61       $ 7.66       $ 7.25         $ 8.75        $ 8.90
                                             --------   --------     --------     --------       --------       -------
  Net investment income (net of $0.09,
    $0.18, $0.17, $0.22, $0.10 and $0.09
    respectively, of interest expense) .....     0.31       0.58         0.55         0.51           0.73          0.91
  Net realized and unrealized gains
    (losses) on investments, short sales,
    futures  and options ...................    (0.14)      0.49         (0.01)       0.65           (1.45)       (0.21)
                                             --------   --------     --------     --------       --------       -------
Net increase (decrease) from investment
  operations ...............................     0.17       1.07         0.54         1.16          (0.72)         0.70
                                             --------   --------     --------     --------       --------       -------
Dividends from net investment income .......    (0.28)     (0.56)       (0.55)       (0.66)         (0.78)        (0.85)
Distributions in excess of net 
  investment income ........................       --         --        (0.04)          --             --            --
Return of capital distribution .............       --         --           --        (0.09)            --             --
                                             --------   --------     --------     --------       --------
  Total dividends and distributions ........    (0.28)     (0.56)       (0.59)       (0.75)         (0.78)        (0.85)
                                             --------   --------     --------     --------       --------       -------
Net asset value, end of period* ............ $   8.01   $   8.12     $   7.61     $   7.66       $   7.25       $  8.75
                                             ========   ========     ========     ========       ========       =======
Per share market value, end of period* ..... $  6 7/8   $  6 7/8     $  6 1/4     $  7 1/4       $  6 3/8       $ 8 3/8
                                             ========   ========     ========     ========       ========       =======
TOTAL INVESTMENT RETURN ....................    4.04%     19.68%       (5.36%)      26.50%        (15.31%)        1.01%

RATIOS TO AVERAGE NET ASSETS:
Operating expenses# ........................    1.02%**    1.02%        1.08%        1.08%          1.10%         1.03%
Net investment income ......................    7.77%**    7.63%        7.36%        6.85%          9.21%        10.19%
SUPPLEMENTAL DATA:
 Average net assets (in thousands) ......... $508,857   $474,903     $473,056     $466,449       $496,707      $558,530
Portfolio turnover .........................     165%       220%         440%         267%           223%          121%
Net assets, end of period (in thousands) ... $503,445   $510,230     $478,085     $481,301       $455,651      $549,755
Reverse repurchase agreements outstanding,
  end of period (in thousands) ............. $228,691   $228,530     $204,438     $214,438       $109,286      $ 74,700
Asset coverage .............................  $ 3,201    $ 3,233      $ 3,339      $ 3,244        $ 5,169       $ 8,360
</TABLE>

- --------------
   *   NAV and market value are published in The WallStreet Journal each Monday.
  **   Annualized.
   #   The ratios of operating  expenses  including  interest expense to average
       net assets were 3.14%**,  3.44%,  3.38%,  4.08%, 2.32%, and 2.02% for the
       periods indicated above, respectively.
   +   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 each  period  reported.  Dividends  and
       distributions  are  assumed,  for  purposes  of this  calculation,  to be
       reinvested at prices  obtained  under the Trust's  dividend  reinvestment
       plan. This  calculation  does not reflect  brokerage  commissions.  Total
       investment  returns  for  periods  of less  than  one  full  year are not
       annualized.
  ++   Per $1,000 of reverse repurchase agreement outstanding.

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 each of 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.

                                       12
<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK INCOME TRUST INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
- --------------------------------------------------------------------------------

NOTE 1.  ACCOUNTING                 The   BlackRock   Income  Trust  Inc.   (the
POLICIES                            "Trust"),  a  Maryland  corporation,   is  a
                                    diversified closed-end management investment
company. The investment objective of the Trust is to achieve high monthly income
consistent  with  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:  The Trust values mortgage-backed,  asset-backed and other
debt securities on the basis of current market quotations provided by dealers or
pricing services approved by the Trust's Board of Directors.  In determining the
value of a particular  security,  pricing  services may use certain  information
with respect to transactions in such securities, quotations from dealers, market
transactions in comparable  securities,  various  relationships  observed in the
market  between  securities,  and  calculated  yield measures based on valuation
technology commonly employed in the market for such securities.  Exchange-traded
options are valued at their last sales price as of the close of options  trading
on the applicable  exchanges.  In the absence of a last sale, options are valued
at the average of the quoted bid and asked prices as of the close of business. A
futures  contract  is  valued  at the last  sale  price  as of the  close of the
commodities  exchange on which it trades  unless the Trust's  Board of Directors
determines  that such price does not reflect  its fair  value,  in which case it
will be  valued  at its  fair  value  as  determined  by the  Trust's  Board  of
Directors.  Any  securities  or other  assets  for  which  such  current  market
quotations  are not readily  available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.

     Short-term  securities  which  mature  in 60  days or less  are  valued  at
amortized  cost,  if their term to maturity  from date of purchase is 60 days or
less.  Short-term  securities with a term to maturity  greater than 60 days from
the date of purchase are valued at current market quotations until maturity.

     In  connection  with  transactions  in repurchase  agreements,  the Trust's
custodian takes possession of the underlying collateral securities, the value of
which at least  equals  the  principal  amount  of the  repurchase  transaction,
including  accrued  interest.  To the  extent  that any  repurchase  transaction
exceeds one business day, the value of the collateral is  marked-to-market  on a
daily basis to ensure the adequacy of the collateral. If the seller defaults and
the value of the collateral declines or if bankruptcy  proceedings are commenced
with respect to the seller of the security, realization of the collateral by the
Trust may be delayed or limited.

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

     Options,  when used by the Trust, help in maintaining a targeted  duration.
Duration is a measure of the price  sensitivity  of a security or a portfolio to
relative changes in interest rates. For instance, a duration of "one" means that
a portfolio's or a security's price would be expected to change by approximately
one percent  with a one percent  change in interest  rates,  while a duration of
five  would  imply  that the price  would  move  approximately  five  percent in
relation to a one percent change in interest rates.

     Option selling and  purchasing is used by the Trust to effectively  "hedge"
positions  so that  changes in interest  rates do not change the duration of the
portfolio  unexpectedly.  In general,  the Trust uses options to hedge a long or
short  position  or an  overall  portfolio  that is longer or  shorter  than the
benchmark  security.  A call option gives the  purchaser of the option the right
(but not  obligation)  to buy, and obligates the seller to sell (when the option
is exercised), the underlying position at the exercise price at any time or at a
specified time during the option period. A put option gives the holder the right
to sell and obligates the writer to buy the underlying  position at the exercise
price at any time or at a specified time during the option  period.  Put options
can be purchased to  effectively  hedge a position or a portfolio  against price
declines  if a  portfolio  is  long.  In the same  sense,  call  options  can be
purchased to hedge a portfolio that is shorter than its benchmark

                                       13
<PAGE>

against price  changes.  The Trust can also sell (or write) covered call options
and put options to hedge portfolio positions.

     The main risk that is associated with purchasing options is that the option
expires without being exercised.  In this case, the option expires worthless and
the premium paid for the option is considered the loss. The risk associated with
writing call options is that the Trust may forego the  opportunity  for a profit
if the  market  value of the  underlying  position  increases  and the option is
exercised. The risk in writing put options is that the Trust may incur a loss if
the  market  value  of the  underlying  position  decreases  and the  option  is
exercised.  In addition,  as with futures  contracts,  the Trust risks not being
able to enter into a closing transaction for the written option as the result of
an illiquid market.

INTEREST  RATE  SWAPS:  In a simple  interest  rate swap,  one  investor  pays a
floating  rate of interest on a notional  principal  amount and receives a fixed
rate of interest on the same notional principal amount for a specified period of
time.  Alternatively,  an  investor  may pay a fixed rate and receive a floating
rate.  Rate swaps were conceived as  asset/liability  management  tools. In more
complex  swaps,  the notional  principal  amount may decline (or amortize)  over
time.

     During  the  term  of the  swap,  changes  in the  value  of the  swap  are
recognized as unrealized gains or losses by  "marking-to-market"  to reflect the
market value of the swap.  When the swap is terminated,  the Trust will record a
realized gain or loss equal to the difference between the proceeds from (or cost
of) the closing  transaction and the Trust's basis in the contract,  if any. The
Trust is exposed  to credit  loss in the event of  non-performance  by the other
party  to  the  mortgage   swap.   However,   the  Trust  does  not   anticipate
non-performance by any counterparty.  

SWAP  OPTIONS:  Swap  options are similar to options on  securities  except that
instead of selling or purchasing the right to buy or sell a security, the writer
or  purchaser of the swap option is granting or buying the right to enter into a
previously  agreed  upon  interest  rate swap  agreement  at any time before the
expiration of the option.  Premiums  received or paid from writing or purchasing
options are recorded as liabilities or assets and are  subsequently  adjusted to
the current market value of the option written or purchased.  Premiums  received
or paid from writing or purchasing  options which expire unexercised are treated
by the Trust on the expiration date as realized gains or losses.  The difference
between the  premium  and the amount  paid or  received  on  effecting a closing
purchase or sale transaction, including brokerage commission, is also treated as
a realized gain or loss. If an option is exercised, the premium paid or received
is added to the proceeds  from the sale or cost of the  purchase in  determining
whether the Trust has realized a gain or loss on investment transactions.

     The main risk that is associated  with  purchasing swap options is that the
swap option expires  without being  exercised.  In this case, the option expires
worthless and the premium paid for the swap option is considered  the loss.  The
main risk that is  associated  with the  writing of a swap  option is the market
risk of an unfavorable  change in the value of the interest rate swap underlying
the written swap option.

     Swap options may be used by the Trust to manage the duration of the Trust's
portfolio  reflecting  the view of the Trust's  management  in the  direction of
interest rates.

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

     Financial futures contracts,  when used by the Trust, help in maintaining a
targeted  duration.  Futures  contracts  can be sold to  effectively  shorten an
otherwise longer duration portfolio. In the same sense, futures contracts can be
purchased  to lengthen a portfolio  that is shorter  than its  duration  target.
Thus, by buying or selling futures contracts,  the Trust can effectively "hedge"
positions  so that  changes in interest  rates do not change the duration of the
portfolio unexpectedly.

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

                                       14
<PAGE>

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

SECURITIES  LENDING:  The Trust may lend its  portfolio  securities to qualified
institutions.  The loans are secured by collateral at least equal, at all times,
to the market  value of the  securities  loaned.  The Trust may bear the risk of
delay in recovery of, or even loss of rights in, the  securities  loaned  should
the borrower of the securities fail financially. The Trust receives compensation
for lending its  securities in the form of interest on the loan.  The Trust also
continues to receive interest on the securities  loaned, and any gain or loss in
the market price of the securities  loaned that may occur during the term of the
loan will be for the account of the Trust.

INTEREST  RATE CAPS:  Interest  rate caps are  similar to  interest  rate swaps,
except  that one party  agrees to pay a fee,  while  the  other  party  pays the
excess,  if any,  of a floating  rate over a specified  fixed or floating  rate.

     Interest  rate caps are intended to both manage the duration of the Trust's
portfolio and its exposure to changes in short term rates.  Owning interest rate
caps reduces the  portfolio's  duration,  making it less sensitive to changes in
interest rates from a market value  perspective.  The effect on income  involves
protection from rising short term rates,  which the Trust experiences  primarily
in the form of leverage.

     The Trust is exposed to credit loss in the event of  non-performance by the
other party to the interest  rate cap.  However,  the Trust does not  anticipate
non-performance by any counterparty.

     Transactions fees paid or received by the Trust are recognized as assets or
liabilities  and amortized or accreted into interest  expense or income over the
life of the interest rate cap. The asset or liability is  subsequently  adjusted
to the current market value of the interest rate cap purchased or sold.  Changes
in the value of the interest rate cap are  recognized  as  unrealized  gains and
losses.

INTEREST  RATE FLOORS:  Interest rate floors are similar to interest rate swaps,
except  that one party  agrees to pay a fee,  while  the  other  party  pays the
excess,  if any, of a floating  rate under a specified  fixed or floating  rate.

     Interest  rate floors are used by the Trust to both manage the  duration of
the portfolio and its exposure to changes in short-term interest rates.  Selling
interest rate floors reduces the portfolio's duration,  making it less sensitive
to changes  in  interest  rates from a market  value  perspective.  The  Trust's
leverage  provides  extra income in a period of falling  rates.  Selling  floors
reduces some of that advantage by partially monetizing it as an up front payment
which the Trust receives.

     The Trust is exposed to credit loss in the event of  non-performance by the
other party to the interest rate floor.  However,  the Trust does not anticipate
non-performance by any counterparty.

     Transactions fees paid or received by the Trust are recognized as assets or
liabilities  and amortized or accreted into interest  expense or income over the
life of the interest rate floor. The asset or liability is subsequently adjusted
to the  current  market  value of the  interest  rate floor  purchased  or sold.
Changes in the value of the interest  rate floor are  recognized  as  unrealized
gains and losses.

SECURITIES  TRANSACTIONS AND NET INVESTMENT INCOME:  Securities transactions are
recorded  on the trade  date.  Realized  and  unrealized  gains and  losses  are
calculated  on the  identified  cost basis.  Interest  income is recorded on the
accrual  basis  and  the  Trust  accretes  discount  and  amortizes  premium  on
securities  purchased  using the interest  method.  Expenses are recorded on the
accrual basis which may require the use of certain estimates by management.

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  substantially all of its taxable income to shareholders.  Therefore,
no federal income tax provision is required.

DIVIDENDS  AND  DISTRIBUTIONS:   The  Trust  declares  and  pays  dividends  and
distributions  monthly,  first from net  investment  income,  then from realized
short-term capital gains and other sources, if necessary.  Net long-term capital
gains,  if any,  in  excess  of loss  carryforwards  are  distributed  at  least
annually. Dividends and distributions are recorded on the ex-dividend date.

     Income  distributions  and capital gain  distributions  are  determined  in
accordance with income tax regulations which may differ from generally  accepted
accounting principles.

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

                                       15
<PAGE>
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 Prudential  Investments Fund
Management LLC ("PIFM"), an indirect,  wholly-owned subsidiary of The Prudential
Insurance Co. of America.

     The  investment  fee paid to the  Adviser is  computed  weekly and  payable
monthly at an annual rate of 0.65% of the Trust's average weekly net assets. The
administration  fee paid to PIFM is also computed  weekly and payable monthly at
an annual rate of 0.20% of the first $500 million of the Trust's  average weekly
net assets and 0.15% of any excess.

     Pursuant to the agreements,  the Adviser provides continuous supervision of
the  investment  portfolio and pays the  compensation  of officers of the Trust.
PIFM pays occupancy and certain  clerical and accounting costs of the Trust. The
Trust bears all other costs and expenses.

NOTE 3. PORTFOLIO                   Purchases    and    sales   of    investment
SECURITIES                          securities,     other    than     short-term
                                    investments  and dollar  rolls,  for the six
months  ended  April 30,  1998  aggregated  $1,154,232,616  and  $1,200,475,138,
respectively.  

     The Trust may invest  without  limit in  securities  which are not  readily
marketable,  including  those  which  are  restricted  as to  disposition  under
securities law ("restricted securities") although the Trust does not expect that
such investments will generally exceed 25% of its portfolio assets. At April 30,
1998, the Trust held 0.5% of its portfolio assets in illiquid  securities all of
which were securities restricted as to resale.

     The Trust may from time to time  purchase in the secondary  market  certain
mortgage  pass-through  securities  packaged or master  serviced by PNC Mortgage
Securities Corp. (or Sears Mortgage if PNC Mortgage  Securities Corp.  succeeded
to rights and duties of Sears) or mortgage related  securities  containing loans
or mortgages  originated by PNC Bank or its affiliates,  including  Midland Loan
Services,  Inc.  It  is  possible  under  certain  circumstances,  PNC  Mortgage
Securities Corp. or its affiliates,  including Midland Loan Services, Inc. could
have interests  that are in conflict with the holders of these  mortgage  backed
securities,  and such holders could have rights against PNC Mortgage  Securities
Corp. or its affiliates, including Midland Loan Services, Inc..

     The federal  income tax basis of the Trust's  investments at April 30, 1998
was $723,798,621 and, accordingly,  net unrealized  appreciation was $27,095,256
(gross      unrealized      appreciation-$37,561,257;      gross      unrealized
depreciation-$10,466,001).

     For federal income tax purposes,  the Trust has a capital loss carryforward
at October 31, 1997 of approximately $81,496,600 of which approximately $264,400
will   expire  in  1998,   approximately   $15,072,600   will  expire  in  2001,
approximately  $23,358,100 will expire in 2002,  approximately  $15,428,300 will
expire in 2003 and approximately  $27,373,200 will expire in 2004.  Accordingly,
no capital gains  distribution is expected to be paid to shareholders  until net
gains have been realized in excess of such amounts.

     Details  of open  financial  futures  contracts  at April  30,  1998 are as
follows:

<TABLE>
<CAPTION>
                                                VALUE AT     VALUE AT
NUMBER OF                        EXPIRATION      TRADE       APRIL 30,   UNREALIZED
CONTRACTS              TYPE         DATE          DATE          1998    DEPRECIATION
- ---------------   -------------  ----------     --------     ---------- ------------
<S>               <C>             <C>         <C>           <C>          <C> 
Long Positions:
     15           10 yr. T-Note   June 1998  $  1,687,802  $  1,684,688  $   (3,114)
Short Positions:
   2152           30 yr. T-Bond   June 1998   258,044,077   258,710,750    (666,673)
                                                                         ----------
                                                                         $ (669,787)
                                                                         ==========
</TABLE>
     The Trust entered into four interest rate caps.  Under all  agreements  the
Trust  receives the excess,  if any, of a floating  rate over a fixed rate.  The
Trust paid a transaction  fee for each  agreement.  Details of the caps at April
30, 1998 are as follows:

 NOTIONAL                                                VALUE AT
  AMOUNT   FIXED   FLOATING   TERMINATION    COST/       APRIL 30,   UNREALIZED
  (000)    RATE      RATE        DATE       PREMIUM        1998     DEPRECIATION
 -------   -----   --------   -----------   -------      --------   ------------
$ 50,000   6.00%  3 MTH LIBOR  2/19/02   $ 1,227,098  $  616,400    $  (610,698)
 100,000   6.50%  3 mth LIBOR  4/4/02      2,819,309     797,043     (2,022,266)
 100,000   7.00%  3 mth LIBOR  4/18/03     2,844,458     738,000     (2,106,458)
 100,000   7.25%  3 mth LIBOR  4/23/03     2,391,826     580,000     (1,811,826)
                                         -----------   ---------    -----------
                                         $ 9,282,691  $2,731,443    $(6,551,248)
                                         ===========  ==========    ===========

     Details of open interest rate swaps at April 30, 1998 are as follows:

NOTIONAL                                                        UNREALIZED
 AMOUNT                    FIXED                  TERMINATION    APPRECIATION
  (000)      TYPE          RATE     FLOATING RATE     DATE     (DEPRECIATION)
- -------   -----------     -------   -------------  ----------  --------------
$ 20,000  Interest Rate    7.50%    1 month LIBOR   04/25/02     $ (644,000)
   5,455  Forward Rate    7.235%    1 Month Libor   06/15/11         77,461
                                                                 ----------
                                                                 $ (566,539)
                                                                 ==========
                                       16
<PAGE>

NOTE 4. BORROWINGS                  REVERSE  REPURCHASE  AGREEMENTS:  The  Trust
                                    enters into  reverse  repurchase  agreements
with  qualified,  third  party  broker-dealers  as  determined  by and under the
direction of the Trust's  Board of  Directors.  Interest on the value of reverse
repurchase  agreements  issued and outstanding is based upon competitive  market
rates at the time of  issuance.  At the time the  Trust  enters  into a  reverse
repurchase agreement, it establishes and maintains a segregated account with the
lender  containing liquid high grade securities having a value not less than the
repurchase  price,   including  accrued  interest,  of  the  reverse  repurchase
agreement.

     The average  daily  balance of reverse  repurchase  agreements  outstanding
during the six months ended April 30, 1998 was  approximately  $254,787,000 at a
weighted  average  interest rate of  approximately  5.68%. The maximum amount of
reverse repurchase agreements outstanding at any month-end during the period was
$229,691,000 as of April 30, 1998, which was 30.53% of total assets.

DOLLAR  ROLLS:  The Trust  enters  into  dollar  rolls in which the Trust  sells
securities  for delivery in the current  month and  simultaneously  contracts to
repurchase  substantially similar (same type, coupon and maturity) securities on
a specified future date.  During the roll period the Trust forgoes principal and
interest paid on the securities. The Trust is compensated by the interest earned
on the cash  proceeds of the initial sale and by the lower  repurchase  price at
the future date. The Trust did not enter into dollar rolls during the six months
ended April 30, 1998.

NOTE 5.  CAPITAL                    There  are 200  million  shares  of $.01 par
                                    value  common  stock   authorized.   Of  the
62,849,878  shares  outstanding  at April 30,  1998,  the Adviser  owned  10,753
shares.

NOTE 6.  DIVIDENDS                  Since April 30, 1998, the Board of Directors
                                    of  the  Trust   declared   dividends   from
undistributed   earnings  of  $0.046875  per  share  payable  May  29,  1998  to
shareholders of record on May 15, 1998.

                                       17
<PAGE>

- --------------------------------------------------------------------------------
                         THE BLACKROCK INCOME TRUST INC.
                           DIVIDEND REINVESTMENT PLAN
- --------------------------------------------------------------------------------

      Pursuant  to  the  Trust's  Dividend   Reinvestment   Plan  (the  "Plan"),
shareholders may elect to have all  distributions of dividends and capital gains
automatically  reinvested  by State  Street  Bank & Trust  Company.  (the  "Plan
Agent")  in  Trust  shares  pursuant  to  the  Plan.  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
Custodian, 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 or elsewhere,  for the participants' accounts. The Trust will not
issue shares under the Plan below net asset value.

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

      The Plan Agent's fees for the  handling of the  reinvestment  of dividends
and distributions will be paid by the Trust.  However, each participant will pay
a pro rata share of  brokerage  commissions  incurred  with  respect to the Plan
Agent's open market  purchases in connection with the  reinvestment of dividends
and  distributions.  The automatic  reinvestment of dividends and  distributions
will not relieve  participants of any federal,  state or local income taxes that
may be payable on such dividend 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 addresses are on the front of
this report.

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

      There have been no material changes in the Trust's  investment  objectives
or policies that have not been approved by the shareholders or to its charter or
by-laws or in the  principal  risk factors  associated  with  investment  in the
Trust.  There have been no changes in the persons who are primarily  responsible
for the day-to-day management of the Trust's portfolio.

      The Annual Meeting of Trust  Shareholders  was held May 6, 1998 to vote on
      the following matters:

      (1) To elect three Directors as follows:

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

      Directors whose term of office  continues beyond this meeting are Frank J.
      Fabozzi,  Ralph L.  Schlosstein,  Walter F. Mondale,  Richard E. Cavanagh,
      James Grosfeld, 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 three Directors and ratified the selection of
          Deloitte & Touche LLP. The results of the voting was as follows

                                    VOTES FOR      VOTES AGAINST    ABSTENTIONS
                                    ---------      -------------    -----------
          Andrew F. Brimmer ....... 51,741,336            0           1,251,120
          Kent Dixon .............. 51,902,210            0           1,090,246
          Laurence D. Fink ........ 51,901,031            0           1,091,425
          Ratification of Deloitte
             & Touche LLP ......... 51,732,575         645,614          614,267

                                       18
<PAGE>

- --------------------------------------------------------------------------------
                         THE BLACKROCK INCOME TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

The  Trust's  investment  objective  is to manage a  portfolio  of high  quality
securities  to achieve high  monthly  income  consistent  with  preservation  of
capital.  The Trust will seek to distribute  monthly income that is greater than
that  obtainable on an annualized  basis by investment in United States Treasury
securities  having the same maturity as the average dollar weighted  maturity of
the Trust's investments.

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?

The Trust will invest at least 65% of its assets in mortgage-backed  securities.
At least 85% of the  Trust's  assets  must be rated at least "AAA" by Standard &
Poor's or "Aaa" by Moody's at the time of purchase;  of this 85% at least 80% of
the Trust's assets must be rated at least "AAA" by Standard & Poor's at the time
of purchase  while the remaining 5% can be invested in securities at least "AAA"
by  Standard & Poor's,  "Aaa" by Moody's or deemed  "AAA" by the  Advisor at the
time of  purchase.  Additionally,  15% of the Trust's  assets can be invested in
securities  rated at least "AA" by  Standard & Poor's or "Aa" by Moody's at time
of purchase. Under current market conditions, BlackRock expects that the primary
investments of the Trust will be U.S. government  securities,  securities backed
by government  agencies (such as mortgage-backed  securities),  privately issued
mortgage-backed   securities,    commercial   mortgage-backed   securities   and
asset-backed securities.

WHAT IS THE ADVISER'S INVESTMENT STRATEGY?

The Adviser will seek to meet the Trust's  investment  objective by managing the
assets of the Trust so as to provide high  monthly  income  consistent  with the
preservation  of capital.  The Trust will seek to provide monthly income that is
greater  than  that  which  could be  obtained  by  investing  in U.S.  Treasury
securities  with an average  life similar to that of the Trust's  assets.  Under
current market conditions, the average life of the Trust's assets is expected to
be in the  range of seven to ten  years.  Under  other  market  conditions,  the
Trust's average life may vary and may not be predictable  using any formula.  In
seeking the investment objective,  the Adviser may actively manage among various
types of securities in different interest rate environments.

Traditional  mortgage  pass-through   securities  make  interest  and  principal
payments on a monthly basis and can be a source of  attractive  levels of income
to the Trust. While  mortgage-backed  securities in the Trust are of high credit
quality,  they  typically  offer  a yield  spread  above  Treasuries  due to the
uncertainty  of the timing of their cash flows as they are subject to changes in
the rate of  prepayments  when  interest  rates  change  and  either a larger or
smaller  proportion of mortgage holders refinance their mortgages or move. While
mortgage-backed  securities  offer the opportunity for attractive  yields,  they
subject a portfolio to interest rate risk and  prepayment  exposure which result
in reinvestment risk when prepaid principal must be reinvested.

Multiple-class  mortgage  pass-through  securities,  or collateralized  mortgage
obligations  (CMOs),  are also an  investment  that  may be used in the  Trust's
portfolio.  These  securities are issued in multiple classes each of which has a
different  coupon  rate,  stated  maturity and  prioritization  on the timing of
receipt of cash  flows  coming  from  interest  and  principal  payments  on the
underlying mortgages. Principal prepayments can be allocated among the different
classes of a CMO in a number of ways; for instance,  they can be applied to each
of the classes in the order of their respective stated maturities.  This feature
allows an investor to better plan the  average  life of their  investment.  As a
result, these securities may be used by the Trust to help manage prepayment risk
and align the assets of the  portfolio  more closely  with its targeted  average
life.

                                       19
<PAGE>

Additionally,  in order to attempt to protect the  portfolio  from interest rate
risk, the Adviser will attempt to locate  securities with call protection,  such
as commercial  mortgage-backed securities with prepayment penalties or lockouts.
Securities with call protection should provide the portfolio with some degree of
protection against  reinvestment risk during times of lower prevailing  interest
rates.

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 reinvested in
additional  shares of the fund through the Trust's transfer agent,  State Street
Bank & Trust Company.  Investors who wish to hold shares in a brokerage  account
should check with their financial  advisor to determine  whether their brokerage
firm offers dividend reinvestment services.


LEVERAGE CONSIDERATIONS IN THE TRUST

Under current  market  conditions,  leverage  increases the income earned by the
Trust.  The  Trust  employs  leverage  primarily  through  the  use  of  reverse
repurchase  agreements  and dollar rolls.  Leverage  permits the Trust to borrow
money at short-term  rates and reinvest that money in  longer-term  assets which
typically offer higher interest  rates.  The difference  between the cost of the
borrowed funds and the income earned on the proceeds that are invested in longer
term assets is the benefit to the Trust from leverage. In general, the portfolio
is typically leveraged at approximately 331/3% of total assets.

Leverage also increases the duration (or price  volatility of the net assets) of
the Trust,  which can improve the  performance  of the fund in a declining  rate
environment,  but can cause net  assets to decline  faster  than the market in a
rapidly rising rate environment.  BlackRock's  portfolio  managers  continuously
monitor and  regularly  review the  Trust's  use of  leverage  and the Trust may
reduce,  or unwind,  the amount of leverage  employed should BlackRock  consider
that reduction to be in the best interests of shareholders.


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
monthly  income  consistent  with  preservation  of  capital,  there  can  be no
assurance that this objective will be achieved.

DIVIDEND  CONSIDERATIONS.  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 reverse repurchase agreements and
dollar rolls,  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:  BKT) 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.

MORTGAGE-BACKED   AND   ASSET-BACKED   SECURITIES.   The  cash  flow  and  yield
characteristics of these securities differ from traditional debt securities. The
major  differences  typically include more frequent payments and the possibility
of prepayments which will change the yield to maturity of the security.

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.

                                       20
<PAGE>

- --------------------------------------------------------------------------------
                         THE BLACKROCK INCOME TRUST INC.
                                    GLOSSARY
- --------------------------------------------------------------------------------

ADJUSTABLE RATE MORTGAGE-BACKED
SECURITIES (ARMS):                  Mortgage instruments   with  interest  rates
                                    that adjust at  eriodic intervals at a fixed
                                    amount  over the market  levels of  interest
                                    rates  as reflected  in  specified  indexes.
                                    ARMS are backed by mortgage loans secured by
                                    real property.

ASSET-BACKED SECURITIES:            Securities   backed  by  various   types  of
                                    receivables  such as  automobile  and credit
                                    card receivables.

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.

COLLATERALIZED  
MORTGAGE OBLIGATIONS (CMOS):        Mortgage-backed  securities  which  separate
                                    mortgage  pools into  short-,  medium-,  and
                                    long-term    securities    with    different
                                    priorities  for  receipt  of  principal  and
                                    interest.  Each  class  is paid a  fixed  or
                                    floating   rate  of   interest   at  regular
                                    intervals.   Also  known  as  multiple-class
                                    mortgage pass-throughs.

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:                           This is income  generated by securities in a
                                    portfolio and  distributed  to  shareholders
                                    after the deduction of expenses.  This Trust
                                    declares  and pays  dividends  on a  monthly
                                    basis.

DIVIDEND REINVESTMENT:              Shareholders   may   elect   to   have   all
                                    distributions of dividends and capital gains
                                    automatically   reinvested  into  additional
                                    shares of the Trust.

FHA:                                Federal Housing Administration, a government
                                    agency that facilitates a secondary mortgage
                                    market   by   providing   an   agency   that
                                    guarantees  timely  payment of interest  and
                                    principal on mortgages.

FHLMC:                              Federal Home Loan  Mortgage  Corporation,  a
                                    publicly    owned,    federally    chartered
                                    corporation  that  facilitates  a  secondary
                                    mortgage market by purchasing mortgages from
                                    lenders  such as  savings  institutions  and
                                    reselling  them to  investors  by  means  of
                                    mortgage-backed  securities.  Obligations of
                                    FHLMC  are  not   guaranteed   by  the  U.S.
                                    government,  however;  they  are  backed  by
                                    FHLMC's authority to borrow from the U.S.
                                    government. Also known as Freddie Mac.

FNMA:                               Federal  National  Mortgage  Association,  a
                                    publicly    owned,    federally    chartered
                                    corporation  that  facilitates  a  secondary
                                    mortgage market by purchasing mortgages from
                                    lenders  such as  savings  institutions  and
                                    reselling  them to  investors  by  means  of
                                    mortgage-backed  securities.  Obligations of
                                    FNMA   are  not   guaranteed   by  the  U.S.
                                    government,  however;  they  are  backed  by
                                    FNMA's authority to borrow from the U.S.
                                    government. Also known as Fannie Mae.

GNMA:                               Government National Mortgage Association,  a
                                    government   agency   that   facilitates   a
                                    secondary  mortgage  market by  providing an
                                    agency  that  guarantees  timely  payment of
                                    interest and principal on mortgages.  GNMA's
                                    obligations  are supported by the full faith
                                    and credit of the U.S. Treasury.  Also known
                                    as Ginnie Mae.

GOVERNMENT SECURITIES:              Securities  issued or guaranteed by the U.S.
                                    government,   or  one  of  its  agencies  or
                                    instrumentalities,  such as GNMA (Government
                                    National   Mortgage    Association),    FNMA
                                    (Federal National Mortgage  Association) and
                                    FHLMC    (Federal    Home   Loan    Mortgage
                                    Corporation).

INTEREST-ONLY   SECURITIES  (I/O):  Mortgage  securities  that  receive only the
                                    interest cash flows from an underlying  pool
                                    of mortgage loans or underlying pass-through
                                    securities. Also known as a STRIP.

                                       21
<PAGE>

INVERSE-FLOATING RATE MORTGAGES:    Mortgage   instruments   with  coupons  that
                                    adjust at periodic intervals  according to a
                                    formula which sets  inversely  with a market
                                    level interest rate index.

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.

MORTGAGE DOLLAR ROLLS:              A mortgage  dollar roll is a transaction  in
                                    which   the  Trust   sells   mortgage-backed
                                    securities for delivery in the current month
                                    and  simultaneously  contracts to repurchase
                                    substantially   similar  (although  not  the
                                    same) securities on a specified future date.
                                    During the "roll" period, the Trust does not
                                    receive  principal and interest  payments on
                                    the  securities,   but  is  compensated  for
                                    giving up these  payments by the  difference
                                    in the  current  sales  price (for which the
                                    security  is sold) and lower  price that the
                                    Trust pays for the  similar  security at the
                                    end date as well as the  interest  earned on
                                    the cash proceeds of the initial sale.

MORTGAGE PASS-THROUGHS:             Mortgage-backed  securities issued by Fannie
                                    Mae, Freddie Mac or Ginnie Mae.

MULTIPLE-CLASS PASS-THROUGHS:       Collateralized Mortgage Obligations.

NET ASSET  VALUE  (NAV):            Net asset value is the total market value of
                                    all  securities  held  by  the  Trust,  plus
                                    income accrued on its investments, minus any
                                    liabilities   including   accrued  expenses,
                                    divided by the total  number of  outstanding
                                    shares.  It is  the  underlying  value  of a
                                    single share on a given day. Net asset value
                                    for  the  Trust  is  calculated  weekly  and
                                    published  in Barron's  on Saturday  and The
                                    Wall Street Journal each Monday.

PRINCIPAL-ONLY SECURITIES (P/O):    Mortgage  securities  that  receive only the
                                    principal cash flows from an underlying pool
                                    of mortgage loans or underlying pass-through
                                    securities. Also known as a STRIP.

PROJECT LOANS:                      Mortgages   for   multi-family,    low-   to
                                    middle-income housing.

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

REMIC:                              A real estate mortgage investment conduit is
                                    a   multiple-class    security   backed   by
                                    mortgage-backed securities or whole mortgage
                                    loans and  formed  as a trust,  corporation,
                                    partnership,  or  segregated  pool of assets
                                    that  elects  to be  treated  as a REMIC for
                                    federal tax purposes.  Generally, Fannie Mae
                                    REMICs  are  formed as trusts and are backed
                                    by mortgage-backed securities.

RESIDUALS:                          Securities   issued   in   connection   with
                                    collateralized   mortgage  obligations  that
                                    generally  represent  the  excess  cash flow
                                    from the mortgage assets  underlying the CMO
                                    after  payment of principal  and interest on
                                    the  other  CMO   securities   and   related
                                    administrative expenses.

REVERSE REPURCHASE   AGREEMENTS:    In a reverse repurchase agreement, the Trust
                                    sells  securities  and agrees to  repurchase
                                    them at a  mutually  agreed  date and price.
                                    During  this time,  the Trust  continues  to
                                    receive the principal and interest  payments
                                    from that security.  At the end of the term,
                                    the Trust receives the same  securities that
                                    were sold for the same initial dollar amount
                                    plus  interest  on the cash  proceeds of the
                                    initial sale.

STRIPPED MORTGAGE                   Arrangements  in which a pool of  assets  is
BACKED SECURITIES:                  separated  into  two  classes  that  receive
                                    different  proportions  of the  interest and
                                    principal   distribution   from   underlying
                                    mortgage-backed  securities.  IO's  and PO's
                                    are examples of STRIPs.

                                       22
<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
Scott Amero, VICE PRESIDENT
Keith T. Anderson, VICE PRESIDENT
Michael C. Huebsch, VICE PRESIDENT
Robert S. Kapito, VICE PRESIDENT
Richard M. Shea, VICE PRESIDENT/TAX
Henry Gabbay, TREASURER
James Kong, ASSISTANT TREASURER
Karen H. Sabath, SECRETARY

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

ADMINISTRATOR
Prudential Investments Fund Management LLC
Gateway Center Three
100 Mulberry Street
Newark, NJ 07102-4077

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

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 INCOME TRUST INC.
                 C/O PRUDENTIAL INVESTMENTS FUND MANAGEMENT LLC
                              Gateway Center Three
                               100 Mulberry Street
                              Newark, NJ 07102-4077
                                 (800) 227-7BFM




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


THE BLACKROCK
INCOME
TRUST INC.
- -------------------
SEMI-ANNUAL REPORT
APRIL 30, 1998

[GRAPHIC]



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