BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 1998-07-01
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- --------------------------------------------------------------------------------
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                          REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------

                                                                    May 31, 1998

Dear Shareholder:

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

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

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

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




/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  New
Jersey Investment  Quality Municipal Trust Inc. ("the Trust") for the six months
ended  April 30,  1998.  We would  like to take this  opportunity  to review the
Trust's  stock  price and net asset value (NAV)  performance,  summarize  market
developments and discuss recent portfolio management activity.

      The Trust is a  non-diversified,  actively  managed  closed-end  bond fund
whose shares are traded on the American  Stock  Exchange under the symbol "RNJ".
The Trust's  investment  objective  is to provide  high  current  income that is
exempt from regular  federal and New Jersey state income taxes  consistent  with
the  preservation  of  capital.  The Trust  seeks to achieve  its  objective  by
investing in investment  grade (rated "AAA" to "BBB" by a major rating agency or
of equivalent quality) municipal debt securities issued by local  municipalities
throughout New Jersey.

      The table below  summarizes the performance of the Trust's stock price and
net asset value (the market value of its bonds per share) over the six months:

================================================================================
                         4/30/98     10/31/97     CHANGE       HIGH        LOW
================================================================================
STOCK PRICE             $13.5625     $12.875      5.34%      $13.875    $12.625
- --------------------------------------------------------------------------------
NET ASSET VALUE (NAV)   $14.35       $14.19       1.13%      $14.68     $14.13
================================================================================

      Additionally, on June 1, 1998, the Trust's Board of Directors announced an
increase  in the  Trust's  monthly  dividend  effective  with the July 31,  1998
payment. The new dividend rate was increased from $0.0578 to $0.0609 monthly, or
from $0.6936 to $0.7308 annually.

THE FIXED INCOME MARKETS

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

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

      Municipal bonds underperformed the taxable domestic bond market during the
past six months,  returning  2.77% (as measured by the LEHMAN  MUNICIPAL  INDEX)
versus the LEHMAN  AGGREGATE  INDEX'S 3.58% on a pre-tax basis.  The main forces
behind  municipal bond  underperformance  were  increased  municipal bond supply
(fueled  by the  lowest  municipal  interest



                                       2


<PAGE>

rates  since the 1960s) and retail  investors  focus on the equity  markets.  We
believe that  municipals  are  attractively  valued  versus  Treasuries  and our
outlook for municipal  securities is favorable.  The robust economy continues to
strengthen the credit quality of most issuers, and we expect that the attractive
taxable equivalent yields offered by municipal securities should bring investors
back into the market.

      New  Jersey's  currently  sound  financial  operations  reflect  a strong,
diversified  economy that is growing  modestly.  The State's  population is also
growing slowly, while unemployment in New Jersey continues to decline to 6.2% in
1997 and wealth levels remained  significantly higher than the national average.
1997 witnessed a significant  increase in the supply of  outstanding  New Jersey
debt,  as the State sold $2.5 billion of bonds in a new pension fund issue.  The
overall  health of the New Jersey  economy  could  result in an  anticipated  $1
billion operating reserve for fiscal year 1998. The Governor expects to fund the
proposed 5.4% budget  increase for fiscal year 1999 with  revenues  derived from
continued economic expansion.

THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

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

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

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

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


                                SECTOR BREAKDOWN
================================================================================
       SECTOR                               APRIL 30, 1998     OCTOBER 31, 1997
- --------------------------------------------------------------------------------
     Special Sales Tax                            21%                 21%
- --------------------------------------------------------------------------------
     Transportation                               20%                 20%
- --------------------------------------------------------------------------------
     Hospital                                     17%                 17%
- --------------------------------------------------------------------------------
     University                                   10%                 10%
- --------------------------------------------------------------------------------
     Power                                         7%                  7%
- --------------------------------------------------------------------------------
     Housing                                       5%                  5%
- --------------------------------------------------------------------------------
     Lease Revenue                                 5%                  5%
- --------------------------------------------------------------------------------
     Sales Tax                                     5%                  5%
- --------------------------------------------------------------------------------
     Schools                                       5%                  5%
- --------------------------------------------------------------------------------
     Waste & Pollution Control                     5%                  5%
================================================================================


                                       3


<PAGE>


================================================================================
    STANDARD & POOR'S/MOODY'S/FITCH'S
              CREDIT RATING               APRIL 30, 1998       OCTOBER 31, 1997
- --------------------------------------------------------------------------------
                 AAA/Aaa                        69%                   70%
- --------------------------------------------------------------------------------
                  AA/Aa                         15%                   15%
- --------------------------------------------------------------------------------
                   A/A                          1%                     --
- --------------------------------------------------------------------------------
                 BBB/Baa                        15%                   15%
================================================================================

      We look  forward to  continuing  to manage  the Trust to benefit  from the
opportunities  available to investors in the investment grade municipal  market.
We thank you for your  investment  and  continued  interest in The BlackRock New
Jersey  Investment  Quality  Municipal  Trust Inc.  Please feel free to call our
marketing  center at (800)  227-7BFM  (7236) if you have any specific  questions
which were not addressed in this report.

Sincerely,

/s/Robert Kapito                         /s/Kevin Klingert
- -----------------                        --------------------
Robert Kapito                            Kevin Klingert
Vice Chairman and Portfolio Manager      Managing Director and Portfolio Manager
BlackRock Financial Management, Inc.     BlackRock Financial Management, Inc.

================================================================================
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
- --------------------------------------------------------------------------------
Symbol on American Stock Exchange:                                     RNJ
- --------------------------------------------------------------------------------
Initial Offering Date:                                            May 28, 1993
- --------------------------------------------------------------------------------
Closing Stock Price as of 4/30/98:                                  $13.5625
- --------------------------------------------------------------------------------
Net Asset Value as of 4/30/98:                                       $14.35
- --------------------------------------------------------------------------------
Yield on Closing Stock Price as of 4/30/98 (13.5625)1:                5.11%
- --------------------------------------------------------------------------------
Current Monthly Distribution per Share2:                             $0.0578
- --------------------------------------------------------------------------------
Current Annualized Distribution per Share2:                          $0.6936
================================================================================

1Yield on Closing Stock Price is calculated by annualizing  the current  monthly
 distribution per share and dividing it by the closing stock price per share.

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


                                       4

<PAGE>

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------

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

                     LONG-TERM INVESTMENTS--147.0%
                     NEW JERSEY--132.4%
<S>       <C>                                                                            <C>               <C>
AAA       $1,000     Essex County Util. Auth. Solid Waste Rev.,
                       Ser. A, 5.60%, 4/01/16, FSA ..................................     4/06 at 102      $ 1,027,790
                     New Jersey Econ. Dev. Auth.,
AAA        1,000       Mkt. Trans. Fac., Ser. A, 5.875%, 7/01/11, MBIA ..............     7/04 at 102        1,079,790
BBB-         500       Trigen-Trenton Proj., 6.20%, 12/01/10 ........................    12/03 at 102          524,265
                     New Jersey Hlth. Care Fac. Fin. Auth. Rev.,
BBB        1,570       Englewood Hosp. & Med. Ctr., 6.50%, 7/01/09 ..................     7/04 at 102        1,702,320
AAA        1,000       Riverview Med. Ctr., 5.50%, 7/01/13, AMBAC ...................     7/04 at 102        1,029,800
AAA        1,000       St. Josephs Hosp. & Med. Ctr., 5.75%, 7/01/16, CONNIE LEE ....     7/06 at 102        1,035,250
                     New Jersey Sports & Exposition Auth. Rev., Conv. Ctr.
                       Luxury Tax, Ser. A,
AAA        1,000       5.50%, 7/01/22, MBIA .........................................     7/02 at 102        1,008,010
AAA        1,000       6.00%, 7/01/12, MBIA .........................................     7/02 at 102        1,059,040
                     New Jersey St. Ed. Fac. Auth. Rev.,
AAA        1,000       Rowan College, Ser. E, 5.875%, 7/01/16, AMBAC ................     7/06 at 101        1,061,990
AAA        1,000       Seton Hall Univ., 5.625%, 7/01/19, MBIA ......................     7/06 at 101        1,027,900
AAA        1,000     New Jersey St. Hsg. & Mtge. Fin., Home Buyer,
                       Ser. O, 6.35%, 10/01/27, MBIA ................................  10/05 at 101.5        1,063,640
AAA        1,000     New Jersey St. Tpke. Auth. Rev., Ser. C, 6.50%, 1/01/16, AMBAC .    No Opt. Call        1,177,110
                     New Jersey St. Trans. Sys. Auth., Trust Fund, Ser. B, MBIA,
AAA        1,000       5.50%, 6/15/15 ...............................................     6/05 at 102        1,022,420
AAA        1,000       5.75%, 6/15/14 ...............................................     6/05 at 102        1,047,070
AA         1,000     North Brunswick Twnshp. Brd. of Ed., 6.30%, 2/01/05++                        N/A        1,100,500
                     Port Authority of NY & NJ,
A1         1,000       5.75%, 12/15/20 ..............................................     6/05 at 101        1,030,870
A1         1,000       Ser. 74, 6.75%, 8/01/26 ......................................     8/01 at 101        1,070,360
AAA        1,000     South Jersey Trans. Auth., Trans. Sys. Rev.,
                       Ser. B, 6.00%, 11/01/12, MBIA ................................    11/02 at 102        1,065,360
                                                                                                            ----------
                                                                                                            19,133,485
                                                                                                            ----------
                     PUERTO RICO--14.6%
BBB+       1,000     Puerto Rico Elec. Pwr. Auth. Rev., Ser. U, 6.00%, 7/01/14 ......     7/04 at 102        1,078,580
AAA        1,000     Puerto Rico Pub. Bldgs. Auth. Rev., Gov't Fac.,
                       Ser. A, 5.50%, 7/01/25, AMBAC ................................   7/05 at 101.5        1,023,970
                                                                                                            ----------
                                                                                                             2,102,550
                                                                                                            ----------
                     Total Long-Term Investments (cost $19,821,331)                                         21,236,035
                                                                                                            ----------

</TABLE>

                       See Notes to Financial Statements.

                                       5

<PAGE>


<TABLE>
<CAPTION>

- ---------------------------------------------------------------------------------------------------------------------------
         PRINCIPAL
          AMOUNT                                                                                              VALUE
RATING*    (000)                                DESCRIPTION                                                 (NOTE 1)
- ---------------------------------------------------------------------------------------------------------------------------
                     SHORT-TERM INVESTMENTS**--2.1%
<S>        <C>                                                                                              <C>
A-1+       $ 200     New Jersey Econ. Dev. Auth. Water Facs. Rev.,
                       4.00%, 5/01/98, FRDD ........................................................       $   200,000
A-1          100     Port Authority of NY & NJ, 4.00%, 5/01/98, FRDD ...............................           100,000
                                                                                                           -----------
                     Total Short-Term Investments (cost $300,000) ..................................           300,000
                                                                                                           -----------
                     Total Investments--149.1% (cost $20,121,331) ..................................        21,536,035
                     Other assets in excess of liabilities--2.8% ...................................           411,334
                     Liquidation value of preferred stock--(51.9)% .................................        (7,500,000)
                                                                                                           -----------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS--100% ............................       $14,447,369
                                                                                                           ===========

</TABLE>



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

================================================================================
    THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:
       AMBAC       -- American Municipal Bond Assurance Corporation
       CONNIE LEE  -- College Construction Loan Insurance Association
       FRDD        -- Floating Rate Daily Demand
       FSA         -- Financial Security Assurance
       MBIA        -- Municipal Bond Insurance Association
================================================================================


                       See Notes to Financial Statements.

                                       6


<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
ASSETS
Investments, at value (cost $20,121,331) (Note 1) .............     $21,536,035
Cash ..........................................................          66,199
Interest receivable ...........................................         377,304
                                                                    -----------
                                                                     21,979,538
                                                                    -----------
LIABILITIES
Advisory fee payable (Note 2) .................................           6,382
Administration fee payable (Note 2) ...........................           1,823
Dividends payable-preferred stock .............................           1,438
Accrued expenses ..............................................          22,526
                                                                    -----------
                                                                         32,169
                                                                    -----------
NET INVESTMENT ASSETS .........................................     $21,947,369
                                                                    ===========
Net investment assets were comprised of:
  Common stock:
    Par value (Note 4) ........................................     $    10,071
    Paid-in capital in excess of par ..........................      13,907,459
  Preferred stock (Note 4) ....................................       7,500,000
                                                                    -----------
                                                                     21,417,530
  Undistributed net investment income .........................         114,845
  Accumulated net realized loss ...............................        (999,710)
  Net unrealized appreciation .................................       1,414,704
                                                                    -----------
  Net investment assets, April 30, 1998 .......................     $21,947,369
                                                                    ===========
  Net assets applicable to common shareholders ................     $14,447,369
                                                                    ===========
Net asset value per share:
  ($14,447,369 /1,007,093 shares of common
  stock issued and outstanding) ...............................          $14.35
                                                                         ======


- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1998 (UNAUDITED)
- --------------------------------------------------------------------------------
NET INVESTMENT INCOME

Income
  Interest and discount earned .................................      $  602,510
                                                                      ----------
Expenses
  Investment advisory ..........................................          38,395
  Administration ...............................................          10,970
  Auction Agent ................................................           9,500
  Reports to shareholders ......................................           7,000
  Directors ....................................................           6,500
  Audit ........................................................           5,000
  Transfer agent ...............................................           4,000
  Legal ........................................................`          3,000
  Custodian ....................................................           1,000
  Miscellaneous ................................................          11,425
                                                                      ----------
  Total expenses ...............................................          96,790
                                                                      ----------
Net investment income ..........................................         505,720
                                                                      ----------


UNREALIZED GAIN
ON INVESTMENTS (NOTE 3)
Net change in unrealized appreciation
  on investments ...............................................         118,921
                                                                      ----------

NET INCREASE IN NET INVESTMENT
ASSETS RESULTING FROM OPERATIONS ...............................      $  624,641
                                                                      ==========

                       See Notes to Financial Statements.

                                       7
<PAGE>

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

INCREASE (DECREASE) IN NET INVESTMENT ASSETS
                                                                                      SIX MONTHS          YEAR
                                                                                        ENDED            ENDED
                                                                                       APRIL 30,       OCTOBER 31,
                                                                                         1998             1997
                                                                                      -----------      -----------
<S>                                                                                   <C>              <C>
Operations:
   Net investment income ..........................................................   $   505,720      $  1,001,648
   Net change in unrealized appreciation on investments ...........................       118,921           671,471
                                                                                      -----------      ------------
   Net increase in net investment assets resulting from operations ................       624,641         1,673,119

Dividends and distributions:
   To common shareholders from net investment income ..............................      (349,219)         (698,299)
   To preferred shareholders from net investment income ...........................      (122,207)         (254,564)
   To common shareholders in excess of net realized gain on investments ...........            --              (151)
   To preferred shareholders in excess of net realized gain on investments ........            --               (50)
                                                                                      -----------       -----------
   Total dividends and distributions ..............................................      (471,426)         (953,064)
                                                                                      -----------       -----------
     Total increase ...............................................................       153,215           720,055

NET INVESTMENT ASSETS
Beginning of period ...............................................................    21,794,154        21,074,099
                                                                                      -----------       -----------
End of period .....................................................................   $21,947,369       $21,794,154
                                                                                      ===========       ===========
</TABLE>

                       See Notes to Financial Statements.

                                       8

<PAGE>

- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                                                    FOR THE PERIOD
                                                   SIX MONTHS            FOR THE YEAR ENDED OCTOBER 31,              JUNE 4, 1993*
PER SHARE OPERATING PERFORMANCE:                      ENDED         -----------------------------------------           THROUGH
                                                  APRIL 30, 1998     1997        1996        1995        1994      OCTOBER 31, 1993
                                                  --------------     -----       -----       -----       -----     ----------------
<S>                                                    <C>          <C>         <C>         <C>         <C>            <C>
Net asset value, beginning of period ..............   $ 14.19       $ 13.48     $ 13.46     $ 11.44     $ 14.54        $ 14.10
                                                     --------       -------     -------     -------     -------        -------
   Net investment income ..........................       .50           .99         .99         .99         .98            .31
   Net realized and unrealized gain (loss) on
     investments ..................................       .13           .66         .01        2.09       (3.11)           .65
                                                     --------       -------    --------    --------    --------       --------
Net increase (decrease) from investment operations.       .63          1.65        1.00        3.08       (2.13)           .96
                                                     --------       -------    --------    --------    --------       --------
Dividends and distributions:
   Dividends from net investment income to:
     Common shareholders ..........................      (.35)        (.69)        (.71)       (.77)      (.77)         (.19)
     Preferred shareholders .......................      (.12)        (.25)        (.26)       (.29)      (.19)         (.04)
  Distributions in excess of net realized gain on
     investments to:
     Common shareholders ..........................        --         ***          (.01)         --         --            --
     Preferred shareholders .......................        --         ***           ***          --         --            --
                                                     --------     -------      --------    --------   --------      --------
Total dividends and distributions .................      (.47)       (.94)         (.98)      (1.06)      (.96)         (.23)
                                                     --------     -------      --------    --------   --------      --------
Capital charge with respect to issuance of common
  and preferred stock .............................        --          --           --           --      (.01)         (.29)
                                                     --------    --------      --------    --------   --------      --------
Net asset value, end of period** ..................   $ 14.35     $ 14.19       $ 13.48     $ 13.46    $ 11.44       $ 14.54#
                                                     ========    ========      ========    ========   ========      ========
Per share market value, end of period** ...........  $13.5625    $ 12.875      $ 11.875     $ 11.75   $ 10.625       $ 14.00
                                                     ========    ========      ========    ========   ========      ========
TOTAL INVESTMENT RETURN+ ..........................     8.10%      14.77%         6.26%      18.37%   (22.07)%          .64%
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS++
Expenses ..........................................     1.34%+++    1.48%         1.57%       1.55%      1.35%         1.07%+++
Net investment income before preferred
  stock dividends .................................     7.00%+++    7.28%         7.37%       7.89%      7.42%         5.22%+++
Preferred stock dividends .........................     1.69%+++    1.85%         1.92%       2.28%      1.48%         0.74%+++
Net investment income available to common
  shareholders ....................................     5.31%+++    5.43%         5.45%       5.61%      5.94%         4.48%+++
SUPPLEMENTAL DATA:
Average net assets of common shareholders
  (in thousands) ..................................   $14,561     $13,761       $13,408    $ 12,580    $13,253      $ 14,431
Portfolio turnover rate ...........................        0%          0%           85%        163%        88%            7%
Net assets of common shareholders, end of
   period (in thousands) ..........................   $14,447     $14,294       $13,574    $ 13,556   $ 11,524      $ 14,646
Asset coverage per share of preferred stock,
   end of period## ................................   $73,163     $72,654       $70,252    $ 70,188   $126,828      $147,641
Preferred stock outstanding (in thousands) ........   $ 7,500     $ 7,500       $ 7,500    $  7,500   $  7,500      $  7,500

</TABLE>

- --------------
  * Commencement of investment operations.
 ** Net asset value and market value are  published  in THE WALL STREET  JOURNAL
    each Monday.
*** Actual  amount paid to common  shareholders  for the year ended  October 31,
    1997 was  $0.00015  per  share,  and the  actual  amount  paid to  preferred
    shareholders was $0.00005 per common share.  Actual amount paid to preferred
    shareholders  for the year ended  October  31,  1996 was  $0.0029 per common
    share.
  # Net asset value  immediately  after the closing of the first public offering
    was $14.01. ## A stock split occurred on July 24, 1995 (Note 4).
  + Total investment return is calculated assuming a purchase of common stock at
    the current  market value on the first day and a sale at the current  market
    price on the last day of each period reported.  Dividends and  distributions
    are assumed for  purposes of this  calculation  to be  reinvested  at prices
    obtained under the Trust's dividend reinvestment plan. This calculation does
    not reflect brokerage  commissions.  Total investment returns for periods of
    less than one year are not annualized.
 ++ Ratios are calculated on the basis of income,  expenses and preferred  stock
    dividends applicable to both the common and preferred shares relative to the
    average net assets of common shareholders.
+++ Annualized.

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

                       See Notes to Financial Statements.

                                       9
<PAGE>

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

NOTE 1. ACCOUNTING         The BlackRock New Jersey Investment Quality Municipal
POLICIES                   Trust Inc. (the  "Trust") was  organized in Maryland
                           on April 12, 1993  as a  non-diversified, closed-end
closed-end management investment company. The Trust's investment objective is to
provide high  current  income  exempt from regular  federal and New Jersey state
income tax consistent with the  preservation of capital.  The ability of issuers
of debt securities  held by the Trust to meet their  obligations may be affected
by  economic  developments  in the state,  a  specific  industry  or region.  No
assurance can be given that the Trust's investment objective will be achieved.

   The following is a summary of significant accounting policies followed by the
Trust.

SECURITIES VALUATION:  Municipal securities  (including  commitments to purchase
such  securities  on a  "when-issued"  basis)  are valued on the basis of prices
provided  by  a  pricing  service  which  uses   information   with  respect  to
transactions  in bonds,  quotations  from bond dealers,  market  transactions in
comparable   securities  and  various   relationships   between   securities  in
determining values. Any securities or other assets for which such current market
quotations  are not readily  available are valued at fair value as determined in
good faith under procedures established by and under the general supervision and
responsibility of the Trust's Board of Directors.

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

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

FEDERAL INCOME TAXES: For federal income tax purposes, the Trust is treated as a
separate taxpaying entity. It is the intent of the Trust to continue to meet the
requirements  of the Internal  Revenue Code  applicable to regulated  investment
companies  and to  distribute  all of its net income to  shareholders.  For this
reason and because  substantially  all of the Trust's  gross income  consists of
tax-exempt interest, no federal income tax provision is required.  

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

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

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

NOTE 2. AGREEMENTS         The Trust has  an Investment Advisory  agreement with
                           BlackRock Financial Management,Inc., (the "Adviser"),
a wholly-owned  corporate  subsidiary of 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 Company of America.

   The investment fee paid to the Adviser is computed weekly and payable monthly
at an annual rate of 0.35% of the Trust's average weekly net investment  assets.
The  administration fee paid to PIFM is also computed weekly and payable monthly
at an annual rate of 0.10% of the Trust's average weekly net investment assets.

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

                                       10

<PAGE>

NOTE 3. PORTFOLIO       There  were  no purchases  and sales of investment sales
SECURITIES              of   investment   securities,  other  than    short-term
                        investments,  for the six months ended April 30, 1998.

   The federal income tax basis of the Trust's investments at April 30, 1998 was
$20,133,718   and,   accordingly,   net   and  gross unrealized appreciation was
$1,402,317.

   For federal income tax purposes, the Trust had a capital loss carryforward at
October 31, 1997 of approximately $987,000 of which $10,000 will expire in 2001,
$690,000  will  expire in 2002,  $280,000  will  expire in 2003 and $7,000  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
amount.

NOTE 4. CAPITAL            There are 200 million shares of $.01 par value common
                           stock authorized. Of the 1,007,093 shares outstanding
at April 30, 1998, the Adviser owned 7,093 shares.  As of April 30, 1998,  there
were 300 shares of Preferred Stock Series T7 outstanding.

   The Trust may classify or reclassify any unissued shares of common stock into
one or more series of preferred  stock. On July 29, 1993 the Trust  reclassified
150 shares of common stock and issued a series of Auction Market Preferred Stock
("Preferred  Stock") Series T7. The Preferred  Stock had a liquidation  value of
$50,000 per share plus any  accumulated  but unpaid  dividends.  On May 16, 1995
shareholders approved a proposal to split each share of the Trust's Auction Rate
Municipal Preferred Stock into two shares and simultaneously reduce each share's
liquidation  preference  from $50,000 to $25,000 plus any accumulated but unpaid
dividends. The stock split occurred on July 24, 1995.

   Dividends on Series T7 are  cumulative  at a rate which is reset every 7 days
based on the results of an auction.  Dividend  rates  ranged from 3.10% to 3.75%
during the six months ended April 30, 1998.

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

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

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

NOTE 5. DIVIDENDS           Subsequent to April 30, 1998, the Board of Directors
                            of the Trust  declared a dividend from undistributed
earnings  of  $0.0578  per  common share payable May 29, 1998 to shareholders of
record on May 15, 1998.

   For the  period May 1, 1998  through  May 31,  1998,  dividends  declared  on
Preferred  Stock  totalled  $22,674 in aggregate for the  outstanding  Preferred
Stock.


                                       11

<PAGE>

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

      Pursuant  to  the  Trust's  Dividend   Reinvestment   Plan  (the  "Plan"),
shareholders will  automatically have all distributions of dividends and capital
gains  reinvested  by State Street Bank and Trust  Company (the "Plan Agent") in
Trust  shares  pursuant to the Plan  unless an election is made to receive  such
amounts in cash.  The Plan Agent will affect  purchases of shares under the Plan
in the open market.  Shareholders  who elect not to participate in the Plan will
receive all  distributions in cash paid by check in United States dollars mailed
directly to the  shareholders  of record (or if the shares are held in street or
other  nominee  name,  then to the nominee) by the transfer  agent,  as dividend
disbursing agent.

      The Plan Agent serves as agent for the shareholders in  administering  the
Plan.  After the Trust  declares a dividend or determines to make a capital gain
distribution,  the Plan Agent will, as agent for the  participants,  receive the
cash payment and use it to buy Trust shares in the open market,  on the American
Stock Exchange or elsewhere,  for the participants' accounts. The Trust will not
issue any new shares in connection with the Plan.

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

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

      Experience  under  the Plan  may  indicate  that  changes  are  desirable.
Accordingly,  the Trust  reserves  the right to amend or  terminate  the Plan as
applied to any dividend or distribution paid subsequent to written notice of the
change sent to all  shareholders of the Trust at least 90 days before the record
date for the dividend or distribution.  The Plan also may be amended by the Plan
Agent upon at least 90 days' written  notice to all  shareholders  of the Trust.
The Plan may be  terminated by the Plan Agent or the Trust upon at least 30 days
written notice to all shareholders of the Trust. All  correspondence  concerning
the Plan should be directed to the Plan Agent at (800)  699-1BFM.  The addresses
are on the front of this report.

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

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

      The Annual Meeting of Trust  Shareholders  was held May 6, 1998 to vote on
      the following matters:
     (1) To elect two Directors as follows:

<TABLE>
<CAPTION>

         DIRECTOR                                                        CLASS             TERM           EXPIRING
         -------                                                         -----             -----           -------
         <S>                                                             <C>              <C>              <C>
         James Grosfeld .............................................      I              3 years           2000
         James Clayburn La Force, Jr. ...............................      I              3 years           2000
</TABLE>

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

     (2) To ratify the selection of Deloitte & Touche LLP as independent  public
         accountants  of the Trust for the fiscal year ending  October 31, 1998.

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

<TABLE>
<CAPTION>
                                                                       VOTES FOR       VOTES AGAINST     ABSTENTIONS
                                                                       --------         -----------      ----------
         <S>                                                             <C>              <C>              <C>
         James Grosfeld .............................................   879,449              0              9,471
         James Clayburn La Force, Jr. ...............................   879,449              0              9,471
         Ratification of Deloitte &Touche LLP .......................   879,644            2,772            6,505

</TABLE>

                                       12

<PAGE>

- --------------------------------------------------------------------------------
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
                               INVESTMENT SUMMARY
- --------------------------------------------------------------------------------

THE TRUST'S INVESTMENT OBJECTIVE

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

WHO MANAGES THE TRUST?

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

WHAT CAN THE TRUST INVEST IN?

Under normal  conditions,  the Trust expects to continue to manage its assets so
that at least 80% of its investments are rated at least  investment grade ("BBB"
by Standard & Poor's and "Baa" by Moody's  Investor  Services)  and up to 20% of
its  assets  may  instead be deemed to be of  equivalent  credit  quality by the
Adviser.  The Trust  intends  to  invest  substantially  all of the  assets in a
portfolio of investment  grade New Jersey Municipal  Obligations,  which include
debt  obligations   issued  by  or  on  behalf  of  New  Jersey,  its  political
subdivisions,  agencies and  instrumentalities  and by other qualifying  issuers
that pay interest  which,  in the opinion of the bond counsel of the issuer,  is
exempt from  regular  Federal  income tax and New Jersey  gross  income tax. New
Jersey  Municipal  Obligations  are issued to obtain  funds for  various  public
functions,  including the construction of public facilities,  the refinancing of
outstanding  obligations,  the obtaining of funds for general operating expenses
and for loans to other public institutions and facilities.

WHAT IS THE ADVISER'S INVESTMENT STRATEGY?

The Adviser will manage the assets of the Trust in  accordance  with the Trust's
investment  objective and policies to seek to achieve its objective by investing
in  investment  grade New Jersey  Municipal  Obligations.  The Adviser  actively
manages the assets in relation to market  conditions  and interest rate changes.
Depending  on yield and  portfolio  allocation  considerations,  the Adviser may
choose  to invest a  portion  of the  Trust's  assets  in  securities  which pay
interest that is subject to AMT (alternative  minimum tax). The Trust intends to
emphasize  investments  in  New  Jersey  Municipal  Obligations  with  long-term
maturities and expects to maintain an average portfolio maturity of 15-20 years,
but the  average  maturity  may be  shortened  or  lengthened  from time to time
depending on market conditions.

Under current market conditions the use of leverage  increases the income earned
by the Trust.  The Trust  employs  leverage  primarily  through the  issuance of
preferred  stock.   Preferred  stockholders  will  receive  dividends  based  on
short-term rates in exchange for allowing the Trust to borrow additional assets.
These assets will be invested in longer-term assets which typically offer higher
interest  rates and the  difference  between the cost of the  dividends  paid to
preferred  stockholders  and the interest earned on the  longer-term  securities
will provide higher income levels for common  stockholders in most interest rate
environments.  The Trust issued  preferred  stock to leverage  the  portfolio at
approximately  35% of total assets.  See "Leverage  Considerations in the Trust"
below.

HOW ARE THE TRUST'S SHARES PURCHASED AND SOLD? DOES THE TRUST PAY DIVIDENDS
REGULARLY?

The Trust's  shares are traded on the American  Stock  Exchange  which  provides
investors with  liquidity on a daily basis.  Orders to buy or sell shares of the
Trust must be placed through a registered broker or financial advisor. The Trust
pays monthly  dividends which are typically paid on the last business day of the
month. For shares held in the shareholder's name, dividends may be reinvested in
additional  shares of the fund through the Trust's transfer agent,  State Street
Bank and Trust Company. Investors who wish to hold shares in a brokerage account
should check with their financial  advisor to determine  whether their brokerage
firm offers dividend reinvestment services.

                                       13

<PAGE>

LEVERAGE CONSIDERATIONS IN THE TRUST

Leverage  increases  the duration (or price  sensitivity  of the net assets with
respect to changes  in  interest  rates) of the  Trust,  which can  improve  the
performance  of the fund in a  declining  rate  environment,  but can  cause net
assets to decline  faster in a rapidly  rising  interest rate  environment.  The
Trust may reduce,  or unwind,  the amount of leverage  employed should BlackRock
consider that  reduction to be in the best  interests of the Trust.  BlackRock's
portfolio managers  continuously monitor and regularly review the Trust's use of
leverage  and  maintain  the  ability to unwind the  leverage  if that course is
chosen.

SPECIAL CONSIDERATIONS AND RISK FACTORS RELEVANT TO THE TRUST

THE TRUST IS  INTENDED  TO BE A  LONG-TERM  INVESTMENT  AND IS NOT A  SHORT-TERM
TRADING VEHICLE.

INVESTMENT  OBJECTIVE.  Although  the  objective of the Trust is to provide high
current  income  exempt from  regular  Federal  income tax and New Jersey  gross
income  tax  consistent  with  the  preservation  of  capital,  there  can be no
assurance that this objective will be achieved.

DIVIDEND  CONSIDERATIONS.  The income and dividends paid by the Trust are likely
to vary over time as fixed income market conditions change. Future dividends may
be higher or lower than the dividend the Trust is currently paying.

LEVERAGE.  The Trust utilizes leverage through  preferred stock,  which involves
special risks. The Trust's net asset value and market value may be more volatile
due to its use of leverage.

MARKET PRICE OF SHARES.  The shares of closed-end  investment  companies such as
the Trust trade on the American Stock  Exchange  (AMEX symbol:  RNJ) and as such
are subject to supply and demand influences.  As a result, shares may trade at a
discount or a premium to their net asset value.

INVESTMENT GRADE MUNICIPAL  OBLIGATIONS.  The value of municipal debt securities
generally  varies  inversely with changes in prevailing  market  interest rates.
Depending  on the amount of call  protection  that the  securities  in the Trust
have, the Trust may be subject to certain  reinvestment risks in environments of
declining interest rates.

ILLIQUID  SECURITIES.  The Trust may  invest in  securities  that are  illiquid,
although  under current  market  conditions the Trust expects to do so to only a
limited extent. These securities involve special risks.

ANTITAKEOVER  PROVISIONS.  Certain antitakeover provisions will make a change in
the Trust's  business or management  more difficult  without the approval of the
Trust's Board of Directors and may have the effect of depriving  shareholders of
an  opportunity  to sell their shares at a premium above the  prevailing  market
price.

                                       14

<PAGE>

- --------------------------------------------------------------------------------
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
                                    GLOSSARY
- --------------------------------------------------------------------------------

CLOSED-END FUND:         Investment  vehicle  which  initially  offers  a  fixed
                         number of shares  and trades on a stock  exchange.  The
                         fund invests in a portfolio of securities in accordance
                         with its stated investment objectives and policies.

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

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

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

MARKET PRICE:            Price per share of a security  trading in the secondary
                         market.  For a  closed-end  fund,  this is the price at
                         which  one  share  of the  fund  trades  on  the  stock
                         exchange.  If you were to buy or sell shares, you would
                         pay or receive the market price.

NET ASSET VALUE (NAV):   Net  asset  value  is the  total  market  value  of all
                         securities  and other  assets  held by the Trust,  plus
                         income   accrued   on  its   investments,   minus   any
                         liabilities including accrued expenses,  divided by the
                         total  number  of   outstanding   shares.   It  is  the
                         underlying  value of a single share on a given day. Net
                         asset  value for the  Trust is  calculated  weekly  and
                         published  in  BARRON'S  on  Saturday  and THE NEW YORK
                         TIMES or THE WALL STREET JOURNAL each Monday.

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

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

                                       15

<PAGE>

- --------------------------------------------------------------------------------
                                 BLACKROCK INC.
                           SUMMARY OF CLOSED-END FUNDS
- --------------------------------------------------------------------------------

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

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

TERM TRUSTS

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

<TABLE>
<CAPTION>
TAX-EXEMPT TRUSTS
- ---------------------------------------------------------------------------------------------------------------------------
                                                                                        STOCK               MATURITY
PERPETUAL TRUSTS                                                                        SYMBOL                 DATE
                                                                                        -------               ------
<S>                                                                                     <C>                 <C>
The BlackRock Investment Quality Municipal Trust Inc.                                    BKN                    N/A
The BlackRock California Investment Quality Municipal Trust Inc.                         RAA                    N/A
The BlackRock Florida Investment Quality Municipal Trust                                 RFA                    N/A
The BlackRock New Jersey Investment Quality Municipal Trust Inc.                         RNJ                    N/A
The BlackRock New York Investment Quality Municipal Trust Inc.                           RNY                    N/A

TERM TRUSTS

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

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


                                       16

<PAGE>

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

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

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

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

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

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

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

                                       17

<PAGE>

Blackrock

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

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

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

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

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

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

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

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

   The accompanying financial statements  as of April 30, 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 NEW JERSEY INVESTMENT
                          QUALITY MUNICIPAL TRUST INC.
                 c/o Prudential Investments Fund Management LLC
                              Gateway Center Three
                               100 Mulberry Street
                              Newark, NJ 07102-4077
                                 (800) 227-7BFM

[LOGO]Printed on recycled paper                                      09247C-10-7
                                                                     09247C-20-6


The Blackrock
New Jersey
Investment Quality
Municipal Trust Inc.
=====================
Semi-annual Report
April 30, 1998



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