BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC
N-30D, 1999-07-01
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- --------------------------------------------------------------------------------
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
                       SEMI-ANNUAL REPORT TO SHAREHOLDERS
                         REPORT OF INVESTMENT ADVISER
- --------------------------------------------------------------------------------
                                                                    May 31, 1999




Dear Shareholder:

     Since  the  Trust's  last  report,  interest  rates  rose  sharply  as U.S.
economic  growth  remained  strong,  labor  markets  tightened and international
markets  began  to  recover. In light of these factors, on May 18 members of the
Federal  Reserve's Federal Open Market Committee announced that they had adopted
a  bias  towards  higher  interest  rates, citing a concern that inflation might
start to accelerate.

     BlackRock  has  adopted  a  cautious view of the bond market, as we believe
that  there  is  a real possibility that the Federal Reserve will raise interest
rates  in  the  near  future. Additionally, because the Treasury yield curve has
already  priced  in  Federal Reserve action, we believe that interest rates will
trade in a relatively narrow range until the economy shows signs of slowing.

     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, 1999


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,  1999.  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 this objective by
investing  in investment grade (rated "AAA" to "BBB" by a major rating agency or
of  equivalent quality) municipal debt securities issued by local municipalities
throughout New Jersey.

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


<TABLE>
<CAPTION>
                         ------------------------------------------------------------
                         4/30/99      10/31/98      CHANGE      HIGH         LOW
- -------------------------------------------------------------------------------------
<S>                      <C>          <C>           <C>         <C>          <C>
 STOCK PRICE             $ 15.063     $ 14.125       6.64%      $ 15.063     $ 14.063
- -------------------------------------------------------------------------------------
 NET ASSET VALUE (NAV)   $ 14.75      $ 14.95       (1.34%)     $ 14.97      $ 14.71
- -------------------------------------------------------------------------------------
</TABLE>

THE FIXED INCOME MARKETS

     The  past  six  months have witnessed continued rapid expansion of the U.S.
economy.  GDP  growth  for  the  first quarter of 1999 is estimated at an annual
rate  above 4%, far exceeding the historical non-inflationary level of 2%. While
BlackRock  believes  that  growth  may  slow down in the second half of 1999, we
anticipate  GDP  to  remain  above  3% for the year. Despite the strong economic
growth,  inflation  has  stayed  surprisingly  subdued.  A significant factor in
maintaining  low  inflation  in  the  U.S.  economy  stems  from the increase in
industrial  productivity. Higher productivity has allowed manufacturers to avoid
price increases despite tight labor markets.

     The  Treasury  market  briefly  rallied early in the fourth quarter of 1998
before  dramatically reversing in 1999. For the semi-annual period, the yield of
the  10-year  Treasury  security rose from 4.61% on October 31, 1998 to 5.35% on
April  30,  1999.  The  weakened  performance  of  the  Treasury  market  can be
attributed  to investors leaving the safe haven of Treasuries to purchase credit
sensitive  or  higher  yielding  securities in reaction to inflationary concerns
voiced by the Federal Reserve.

     Municipal  bonds  outperformed  the taxable domestic bond market during the
past  six  months,  returning  1.55% (as measured by the LEHMAN MUNICIPAL INDEX)
versus  the  LEHMAN  AGGREGATE INDEX'S 0.68% on a pre-tax basis. The main forces
behind  municipal  bond outperformance were the strongest mutual fund inflows in
five  years  and  the reduction of municipal bond supply (due to higher interest
rates)  after the second highest year of issuance ($284 billion issued in 1998.)
We  believe  that  municipals currently offer attractive value versus Treasuries
and   our   outlook  for  municipal  securities  is  favorable.  Despite  recent
outperformance  we  still  feel  that  the  attractive taxable equivalent yields
offered by municipal securities are compelling.

     New  Jersey's diverse and strong economy continues to fuel job creation. By
the  end  of  1998,  the  State  added approximately 365,000 jobs thus recouping
nearly  150%  of  those  eliminated  during  the last recession. This widespread
employment  supports New Jersey's 13% increase in per capita income (1995-1998),
the  highest  in  the  mid-Atlantic region. The State's economic growth supports
New  Jersey's  strong  financial  position  despite Governor Whitman's five year
history  of  income,  business and corporate tax reductions. The State's general
fund  bonds'  creditworthiness  continues  to  be  enhanced  with  the  annually
increasing  "Rainy  Day"  fund  and  the larger unreserved General Fund balances
together  projected  to be 4.46% of General Fund revenues in FY1999 and budgeted
to be yet greater in 2000.


                                       2


<PAGE>


THE TRUST'S PORTFOLIO AND INVESTMENT STRATEGY

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

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

     As  municipal credit spreads remained tight during the reporting period, we
continued  to  emphasize higher rated securities over the lower rated investment
grade  sector.  We  believe  that  credit spreads will return to more historical
levels  in  the  near  future  and  as such the Trust should be rewarded for its
higher  credit  quality  bias.  The Trust has continued its bias towards premium
coupon  securities  over  discount  priced  securities, as premium coupons offer
better  price  performance  during  periods of rising interest rates and similar
performance to discounts when interest rates fall.

     The  following  charts  compare  the  Trust's  current and October 31, 1998
asset composition and credit quality allocations:


                               SECTOR BREAKDOWN

- ----------------------------------------------------------------
   SECTOR                     APRIL 30, 1999   OCTOBER 31, 1998
- ----------------------------------------------------------------
  Special Sales Tax                 20%               20%
- ----------------------------------------------------------------
  Transportation                    20%               20%
- ----------------------------------------------------------------
  Hospital                          10%               17%
- ----------------------------------------------------------------
  University                        10%               10%
- ----------------------------------------------------------------
  Housing                           10%                5%
- ----------------------------------------------------------------
  General Obligation                 5%                --
- ----------------------------------------------------------------
  Power                              5%                7%
- ----------------------------------------------------------------
  Waste & Pollution Control          5%                6%
- ----------------------------------------------------------------
  Lease Revenue                      5%                5%
- ----------------------------------------------------------------
  Sales Tax                          5%                5%
- ----------------------------------------------------------------
  Schools                            5%                5%
- ----------------------------------------------------------------

- ----------------------------------------------------------------
    CREDIT RATING*            APRIL 30, 1999   OCTOBER 31, 1998
- ----------------------------------------------------------------
  AAA/Aaa                           69%               70%
- ----------------------------------------------------------------
  AA/Aa                             19%               15%
- ----------------------------------------------------------------
  A/A                                5%                --
- ----------------------------------------------------------------
  BBB/Baa                            7%               15%
- ----------------------------------------------------------------


- ----------
* Using the higher of Standard & Poor's, Moody's or Fitch's rating.


                                       3


<PAGE>


     We  look  forward  to  continuing  to  manage the Trust to benefit from the
opportunities  available  to investors in the investment grade municipal market.
We  thank  you  for  your investment and continued interest in The BlackRock 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 4/30/99:                        $15.063
- --------------------------------------------------------------------------
  Net Asset Value as of 4/30/99:                            $14.75
- --------------------------------------------------------------------------
  Yield on Closing Stock Price as of 4/30/99 (15.063)1:       4.85%
- --------------------------------------------------------------------------
  Current Monthly Distribution per Share2:                   $0.0609
- --------------------------------------------------------------------------
  Current Annualized Distribution per Share2:                $0.7308
- --------------------------------------------------------------------------

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


                                       4


<PAGE>


- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
PORTFOLIO OF INVESTMENTS APRIL 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>

         PRINCIPAL
           AMOUNT                                                                                       OPTION CALL      VALUE
 RATING*   (000)                                        DESCRIPTION                                     PROVISION+     (NOTE 1)
======== ==========  ============================================================================== ================= =============
<S>       <C>        <C>                                                                                <C>            <C>
                     LONG-TERM INVESTMENTS-147.8%
          $1,000++   NEW JERSEY-133.4%
 AAA       1,000     Essex Cnty. Util. Auth. Solid Waste Rev., Ser. A, 5.60%, 4/01/06, FSA ........       N/A          $ 1,102,580
 Aa2                 New Jersey Bldg. Auth. Rev., 5.00%, 6/15/11 ..................................    06/07 at 102      1,030,750
           1,000     New Jersey Econ. Dev. Auth.,
 AAA         500      Mkt. Trans. Fac., Ser. A, 5.875%, 7/01/11, MBIA .............................     7/04 at 102      1,084,460
 BBB-                 Trigen-Trenton Proj., 6.20%, 12/01/10 .......................................    12/03 at 102        523,710
           1,000     New Jersey Hlth. Care Fac. Fin. Auth. Rev.,
 AAA       1,000      Riverview Med. Ctr., 5.50%, 7/01/13, AMBAC ..................................     7/04 at 102      1,056,150
 AAA                  St. Josephs Hosp. & Med. Ctr., 5.75%, 7/01/16, CONNIE LEE ...................     7/06 at 102      1,066,110
           1,000     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      1,028,020
 AAA                  6.00%, 7/01/12, MBIA ........................................................       N/A            1,086,920
           1,000     New Jersey St. Ed. Fac. Auth. Rev.,
 AAA       1,000      Rowan College, Ser. E, 5.875%, 7/01/16, AMBAC ...............................     7/06 at 101      1,087,360
 AAA       1,000      Seton Hall Univ., 5.625%, 7/01/19, MBIA .....................................     7/06 at 101      1,050,300
 AA+       1,000     New Jersey St. G.O., 5.00%, 3/01/12 ..........................................     3/08 at 100      1,028,160
 AAA       1,000     New Jersey St. Hsg. & Mtge. Fin., Home Buyer, Ser. O, 6.35%, 10/01/27, MBIA    10/ 05 at 101.5      1,057,300
 AAA                 New Jersey St. Tpke. Auth. Rev., Ser. C, 6.50%, 1/01/16, AMBAC ...............    No Opt. Call      1,183,100
           1,000     New Jersey St. Trans. Sys. Auth., Trust Fund, Ser. B, MBIA,
 AAA       1,000      5.50%, 6/15/15 ..............................................................     6/05 at 102      1,051,440
 AAA       1,000++    5.75%, 6/15/14 ..............................................................     6/05 at 102      1,075,060
 AA                  North Brunswick Twnshp. Brd. of Ed., 6.30%, 2/01/05 ..........................       N/A            1,115,200
           1,000     Port Auth. of NY & NJ,
 AA-       1,000      5.75%, 12/15/20 .............................................................     6/05 at 101      1,041,940
 AA-       1,000      Ser. 74, 6.75%, 8/01/26 .....................................................     8/01 at 101      1,069,410
 AAA                 South Jersey Trans. Auth., Trans. Sys. Rev., Ser. B, 6.00%, 11/01/12, MBIA.       11/02 at 102      1,074,130
                                                                                                                        ----------
                                                                                                                        19,812,100
                                                                                                                        ----------
                     PUERTO RICO-14.4%
 BBB+      1,000     Puerto Rico Elec. Pwr. Auth. Rev., Ser. U, 6.00%, 7/01/14 ....................     7/04 at 102      1,097,980
 AAA       1,000     Puerto Rico Pub. Bldg. Auth. Rev., Gov't Fac.,
                      Ser. A, 5.50%, 7/01/25, AMBAC ...............................................   7/05 at 101.5      1,037,940
                                                                                                                        ----------
                                                                                                                         2,135,920
                                                                                                                        ----------
</TABLE>


                       See Notes to Financial Statements.

                                       5


<PAGE>


<TABLE>
<CAPTION>
================================================================================================
           PRINCIPAL
            AMOUNT                                                                     VALUE
 RATING*     (000)                            DESCRIPTION                            (NOTE 1)
========= ========== ============================================================ ==============
<S>       <C>        <C>                                                          <C>
                     TOTAL INVESTMENTS-147.8% (COST $20,333,209) ................  $ 21,948,020
                                                                                   ------------
                     Other assets in excess of liabilities-2.7% .................       404,377
                     Liquidation value of preferred stock-(50.5)% ...............    (7,500,000)
                                                                                   ------------
                     NET ASSETS APPLICABLE TO COMMON SHAREHOLDERS-100% ..........  $ 14,852,397
                                                                                   ============
</TABLE>

- ----------
 * Rating: Using the higher of Standard & Poor's, Moody's or Fitch's rating.

 + Option  call  provisions:  date (month/year) and prices of the earliest call
   or  redemption.  There  may  be  other  call  provisions at varying prices at
   later dates.

++ This bond is prerefunded. See glossary for definition.





<TABLE>
<S>                                                                <C>
- ----------------------------------------------------------------------------------------------------------------
         THE FOLLOWING ABBREVIATIONS ARE USED IN PORTFOLIO DESCRIPTIONS:

 AMBAC      - American Municipal Bond Assurance Corporation       G.O. - General Obligation
 CONNIE LEE - College Construction Loan Insurance Association     MBIA - Municipal Bond Insurance Association
 FSA        - Financial Security Assurance
- ----------------------------------------------------------------------------------------------------------------
</TABLE>

                       See Notes to Financial Statements.

                                        6


<PAGE>
- --------------------------------------------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF ASSETS AND LIABILITIES
APRIL 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------

<TABLE>
<S>                                                    <C>
ASSETS
Investments, at value (cost $20,333,209) (Note 1).....  $21,948,020
Cash .................................................       64,014
Interest receivable ..................................      370,694
                                                        -----------
                                                         22,382,728
                                                        -----------
LIABILITIES
Investment Advisory fee payable (Note 2) .............        6,446
Due to Custodian .....................................        6,107
Dividends payable-preferred stock ....................        2,003
Administration fee payable (Note 2) ..................        1,842
Other accrued expenses ...............................       13,933
                                                        -----------
                                                             30,331
                                                        -----------
NET INVESTMENT ASSETS ................................  $22,352,397
                                                        ===========
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 .................      159,904
 Accumulated net realized loss .......................     (839,848)
 Net unrealized appreciation .........................    1,614,811
                                                        -----------
Net investment assets, April 30, 1999 ................  $22,352,397
                                                        ===========
Net assets applicable to common shareholders .........  $14,852,397
                                                        ===========
Net asset value per share:
 ($14,852,397 o/o 1,007,093 shares of common
 stock issued and outstanding) .......................       $14.75
                                                             ======
</TABLE>


- --------------------------------------------
THE BLACKROCK NEW JERSEY INVESTMENT
QUALITY MUNICIPAL TRUST INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED APRIL 30, 1999 (UNAUDITED)
- --------------------------------------------

<TABLE>
<S>                                          <C>
  NET INVESTMENT INCOME

Income
  Interest and discount earned ...........   $599,326
                                             --------

Expenses
  Investment advisory ....................     39,029
  Administration .........................     11,151
  Auction Agent ..........................      9,000
  Directors ..............................      7,000
  Reports to shareholders ................      6,000
  Transfer agent .........................      5,000
  Audit ..................................      3,500
  Legal ..................................      3,000
  Custodian ..............................      1,000
  Miscellaneous ..........................      6,456
                                             --------
  Total expenses .........................     91,136
                                             --------
Net investment income ....................    508,190
                                             --------


REALIZED AND UNREALIZED GAIN (LOSS)
ON INVESTMENTS (NOTE 3)
Net realized gain on investments .........    159,862
Net change in unrealized appreciation
 on investments ..........................   (389,558)
                                             --------
Net loss on investments ..................   (229,696)
                                             --------

NET INCREASE IN NET INVESTMENT ASSETS
RESULTING FROM OPERATIONS ................   $278,494
                                             ========
 </TABLE>

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>
                                                                              SIX MONTHS ENDED      YEAR ENDED
                                                                                  APRIL 30,         OCTOBER 31,
                                                                                    1999               1998
INCREASE (DECREASE) IN NET INVESTMENT ASSETS                                 -----------------     -----------
<S>                                                                             <C>                <C>
Operations:
 Net investment income ...................................................      $   508,190        $ 1,008,741

 Net realized gain on investments ........................................          159,862                  -

 Net change in unrealized appreciation (depreciation) on investments .....         (389,558)           708,586
                                                                                -----------        -----------
 Net increase in net investment assets resulting from operations .........          278,494          1,717,327

Dividends and distributions:

 To common shareholders from net investment income .......................         (367,940)          (710,922)

 To preferred shareholders from net investment income ....................         (112,687)          (246,029)
                                                                                -----------        -----------
 Total dividends and distributions .......................................         (480,627)          (956,951)
                                                                                -----------        -----------
  Total increase (decrease) ..............................................         (202,133)           760,376

NET INVESTMENT ASSETS

Beginning of period ......................................................       22,554,530         21,794,154
                                                                                -----------        -----------
End of period ............................................................      $22,352,397        $22,554,530
                                                                                ===========        ===========
</TABLE>



                       See Notes to Financial Statements.

                                       8


<PAGE>


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

<TABLE>
<CAPTION>
                                                                          SIX MONTHS ENDED
                                                                             APRIL 30,
                                                                                1999
                                                                                ----
<S>                                                                  <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ...............................          $ 14.95
                                                                              -------
Net investment income ..............................................              .50
Net realized and unrealized gain (loss) on investments .............             (.22)
                                                                              -------
Net increase (decrease) from investment operations .................              .28
                                                                              -------
Dividends and distributions:
 Dividends from net investment income to:
  Common shareholders ..............................................             (.37)
  Preferred shareholders ...........................................             (.11)
Distributions in excess of net realized gain on investments to:
  Common shareholders ..............................................                -
  Preferred shareholders ...........................................                -
                                                                              -------
Total dividends and distributions ..................................             (.48)
                                                                              -------
Capital charge with respect to issuance of common
 and preferred stock ...............................................                -
                                                                              -------
Net asset value, end of period* ....................................          $ 14.75
                                                                              =======
Per share market value, end of period* .............................          $ 15.063
                                                                              =======
TOTAL INVESTMENT RETURN+ ...........................................             9.31%
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS++
Expenses ...........................................................             1.23%+++
Net investment income before preferred stock dividends .............             6.87%+++
Preferred stock dividends ..........................................             1.52%+++
Net investment income available to common shareholders .............             5.35%+++
SUPPLEMENTAL DATA:
Average net assets of common shareholders (in thousands) ...........          $14,926
Portfolio turnover rate ............................................                8%
Net assets of common shareholders, end of period (in thousands).....          $14,852
Asset coverage per share of preferred stock, end of period# ........          $74,515
Preferred stock outstanding (in thousands) .........................          $ 7,500



<CAPTION>
                                                                                   FOR THE YEAR ENDED OCTOBER 31,
                                                                         -------------------------------------------------
                                                                          1998           1997           1996         1995
                                                                          ----           ----           ----         ----
<S>                                                                     <C>            <C>            <C>            <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ...............................    $ 14.19        $ 13.48        $ 13.46      $ 11.44
                                                                        -------        -------        -------      -------
Net investment income ..............................................       1.00            .99            .99          .99
Net realized and unrealized gain (loss) on investments .............        .71            .66            .01         2.09
                                                                        -------        -------        -------      -------
Net increase (decrease) from investment operations .................       1.71           1.65           1.00         3.08
                                                                        -------        -------        -------      -------
Dividends and distributions:
 Dividends from net investment income to:
  Common shareholders ..............................................       (.71)          (.69)          (.71)        (.77)
  Preferred shareholders ...........................................       (.24)          (.25)          (.26)        (.29)
Distributions in excess of net realized gain on investments to:
  Common shareholders ..............................................          -             **           (.01)           -
  Preferred shareholders ...........................................          -             **             **            -
                                                                        -------        -------        -------      -------
Total dividends and distributions ..................................       (.95)          (.94)          (.98)       (1.06)
                                                                        -------        -------        -------      -------
Capital charge with respect to issuance of common
 and preferred stock ...............................................          -              -              -           --
                                                                        -------        -------        -------      -------
Net asset value, end of period* ....................................    $ 14.95        $ 14.19        $ 13.48      $ 13.46
                                                                        =======        =======        =======      =======
Per share market value, end of period* .............................    $ 14.125       $ 12.875       $ 11.875     $ 11.75
                                                                        =======        =======        =======      =======
TOTAL INVESTMENT RETURN+  ..........................................      15.56%         14.77%          6.26%       18.37%
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS++
Expenses ...........................................................       1.35%          1.48%          1.57%        1.55%
Net investment income before preferred stock dividends .............       6.88%          7.28%          7.37%        7.89%
Preferred stock dividends ..........................................       1.68%          1.85%          1.92%        2.28%
Net investment income available to common shareholders .............       5.20%          5.43%          5.45%        5.61%
SUPPLEMENTAL DATA:
Average net assets of common shareholders (in thousands) ...........    $14,663        $13,761        $13,408      $12,580
Portfolio turnover rate ............................................          0%             0%            85%         163%
Net assets of common shareholders, end of period (in thousands).....    $15,055        $14,294        $13,574      $13,556
Asset coverage per share of preferred stock, end of period# ........    $75,191        $72,654        $70,252      $70,188
Preferred stock outstanding (in thousands) .........................    $ 7,500        $ 7,500        $ 7,500      $ 7,500



<CAPTION>
                                                                           1994
                                                                           ----
<S>                                                                  <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ...............................      $ 14.54
                                                                          -------
Net investment income ..............................................          .98
Net realized and unrealized gain (loss) on investments .............        (3.11)
                                                                          -------
Net increase (decrease) from investment operations .................         (.13)
                                                                          -------
Dividends and distributions:
 Dividends from net investment income to:
  Common shareholders ..............................................         (.77)
  Preferred shareholders ...........................................         (.19)
Distributions in excess of net realized gain on investments to:
  Common shareholders ..............................................            -
  Preferred shareholders ...........................................            -
                                                                          -------
Total dividends and distributions ..................................         (.96)
                                                                          -------
Capital charge with respect to issuance of common
 and preferred stock ...............................................         (.01)
                                                                          -------
Net asset value, end of period* ....................................      $ 11.44
                                                                          =======
Per share market value, end of period* .............................      $ 10.625
                                                                          =======
TOTAL INVESTMENT RETURN\^ ..........................................       (22.07%)
RATIOS TO AVERAGE NET ASSETS OF COMMON
SHAREHOLDERS\^\^
Expenses ...........................................................         1.35%
Net investment income before preferred stock dividends .............         7.42%
Preferred stock dividends ..........................................         1.48%
Net investment income available to common shareholders .............         5.94%
SUPPLEMENTAL DATA:
Average net assets of common shareholders (in thousands) ...........     $ 13,253
Portfolio turnover rate ............................................           88%
Net assets of common shareholders, end of period (in thousands).....     $ 11,524
Asset coverage per share of preferred stock, end of period# ........     $126,828
Preferred stock outstanding (in thousands) .........................     $  7,500
</TABLE>

- ----------
  * 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.
  # 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. ORGANIZATION &               The BlackRock New Jersey Investment Quality
ACCOUNTING                           Municipal  Trust  Inc.  (the  "Trust")  was
POLICIES                             organized  in Maryland on April 12, 1993 as
                                     a  non-diversified,  closed-end  management
investment  company.  The  Trust's investment objective is to manage a portfolio
of  high  quality  securities  while  providing  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.

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           Purchases and sales of investment securities, other
SECURITIES                  than  short-term  investments, for the  period ended
                            April 30, 1999 aggregated $2,068,100 and $1,715,225,
respectively.

     The  federal  income tax basis of the Trust's investments at April 30, 1999
was  $20,345,596  and,  accordingly,  net unrealized appreciation was $1,602,424
(gross   unrealized   appreciation  $1,611,147;  gross  unrealized  depreciation
$8,723).

     For  federal income tax purposes, the Trust had a capital loss carryforward
at  October  31,  1998 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, 1999,  the Adviser owned 7,093 shares.  As of April 30,
1999, 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 2.60% to
3.50% during the six months ended April 30, 1999.

     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, 1999, the Board of Directors
                            of the Trust declared a dividend from  undistributed
earnings of $0.0609 per common  share  payable May 28, 1999 to  shareholders  of
record on May 14, 1999.

     For  the  period  May  1,  1999  through May 31, 1999 dividends declared on
Preferred  Stock  totalled  $21,059  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  are  automatically enrolled to 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. 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 under the Plan.

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

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

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


                                       12


<PAGE>


- --------------------------------------------------------------------------------
        THE BLACKROCK NEW JERSEY INVESTMENT QUALITY MUNICIPAL TRUST INC.
                             ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
     YEAR  2000  READINESS  DISCLOSURE. The Trust is currently in the process of
evaluating  its  information technology infrastructure for Year 2000 compliance.
Substantially  all  of  the  Trust's  information  systems  are  supplied by the
Adviser.  The  Adviser  has  advised  the  Trust that it is currently evaluating
whether  such systems are year 2000 compliant and that it expects to incur costs
of   up  to  approximately  five  hundred  thousand  dollars  to  complete  such
evaluation  and  to make any modifications to its systems as may be necessary to
achieve  Year  2000  compliance.  The  Adviser has advised the Trust that it has
fully  tested its systems for Year 2000 compliance. The Trust may be required to
bear  a portion of such cost incurred by the Adviser in this regard. The Adviser
has  advised  the  Trust  that it does not anticipate any material disruption in
the  operations  of  the  Trust  as  a  result  of any failure by the Adviser to
achieve  Year 2000 compliance. There can be no assurance that the costs will not
exceed  the  amount  referred  to  above or that the Trust will not experience a
disruption in operations.

     The  Adviser  has advised the Trust that it is in the process of evaluating
the  Year 2000 compliance of various suppliers of the Adviser and the Trust. The
Adviser  has  advised  the Trust that it has communicates with such suppliers to
determine  their Year 2000 compliance status and the extent to which the Adviser
or  the  Trust  could be affected by any supplier's Year 2000 compliance issues.
To  date the Adviser has received responses from all such suppliers with respect
to  their  Year  2000 compliance, and there can be no assurance that the systems
of  such  suppliers,  who  are  beyond  the  Trust's  control, will be Year 2000
compliant.  In  the  event  that any of the Trust's significant suppliers do not
successfully  and  timely  achieve Year 2000 compliance, the Trust's business or
operations  could  be adversely affected. The Adviser has advised the Trust that
it  is  in  the process of preparing a contingency plan for Year 2000 compliance
by  its  suppliers. There can be no assurance that such contingency plan will be
successful in preventing a disruption of the Trust's operations.

     The  Trust  is  designating  this  disclosure  as  its  Year 2000 readiness
disclosure  for  all  purposes  under  the  Year  2000 Information and Readiness
Disclosure  Act  and  the  foregoing  information  shall  constitute a Year 2000
statement for purposes of that Act.

     ANNUAL  MEETING  OF TRUST SHAREHOLDERS. 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 19, 1999 to vote on
the following matters:

     (1) To elect three Directors as follows:

        DIRECTOR                           CLASS      TERM      EXPIRING
        --------                           -----      ----      --------
        Frank J. Fabozzi ..............     II      3 years       2002
        Walter F. Mondale .............     II      3 years       2002
        Ralph L. Schlosstein ..........     II      3 years       2002

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

   (2)  To ratify the selection of Deloitte & Touche LLP as  independent  public
        accountants  of the Trust for the fiscal year ending  October 31,  1999.

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

<TABLE>
<CAPTION>
                                                         VOTES FOR*     VOTES AGAINST*     ABSTENTIONS*
                                                        ------------   ----------------   -------------
<S>                                                         <C>              <C>               <C>
        Frank J. Fabozzi ...............................        270            -                 -
        Walter F. Mondale ..............................    874,600            -               3,066
        Ralph L. Schlosstein ...........................    874,600            -               3,066
        Ratification of Deloitte & Touche LLP ..........    863,104          7,864             6,698
</TABLE>

- ---------------
* The votes represent common and preferred shareholders voting as a single class
  except for the  election of  Frank J. Fabozzi who was elected by the preferred
  shareholders.


                                       13


<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  State  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 $141
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  $25 billion family of open-end equity and bond funds.
Current accounts number over 450, 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  or "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 State 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  or  other qualifying
issuers.  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.


                                       14


<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  Trust  in  a declining rate environment, but can cause net
assets  to  decline  faster  in  a rapidly rising interest rate environment. The
Trust  may  reduce,  or unwind, the amount of leverage employed should BlackRock
consider  that  reduction  to be in the best interests of the Trust. BlackRock's
portfolio  managers continuously monitor and regularly review the Trust's use of
leverage  and  maintain  the  ability  to  unwind the leverage if that course is
chosen.

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 State
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.


                                       15



<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 a fund.

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, THE NEW YORK TIMES and THE WALL STREET JOURNAL
                        on Monday.

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

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


                                       16


<PAGE>


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

TAXABLE TRUSTS
- --------------------------------------------------------------------------------

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

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

<TABLE>
<CAPTION>
                                                                       STOCK      MATURITY
                                                                       SYMBOL       DATE
PERPETUAL TRUSTS                                                     ---------   ---------
<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.


                                       17


<PAGE>


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

     BlackRock  Financial  Management,  Inc.  ("BlackRock") is an SEC-registered
investment  adviser.  BlackRock  and  its  affiliates currently manage over $141
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 $25
billion  family  of open-end equity and bond funds. Current accounts number over
450, 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  are dedicated to the design,
maintenance  and  use  of  these  systems,  which are not otherwise available to
investors.  BlackRock's  proprietary  analytical  tools are used for evaluating,
and   designing  fixed  income  investment  strategies  for  client  portfolios.
Securities  purchased  include mortgages, corporate bonds, municipal bonds and a
variety of hedging instruments.

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

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










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


                                       18


<PAGE>

BlackRock

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

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

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

ADMINISTRATOR
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, 1999 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


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                                                                   09247C-20-6

        ----------------------
         BlackRock
THE     ----------------------
NEW JERSEY
INVESTMENT QUALITY
MUNICIPAL TRUST INC.
==============================
SEMI-ANNUAL REPORT
APRIL 30, 1999




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