BAT SUBSIDIARY INC
N-30D, 1999-08-27
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BAT SUBSIDIARY, INC.
- --------------------------------------------------------------------------------
SEMI-ANNUAL REPORT
JUNE 30, 1999

[LOGO]



<PAGE>



- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
PORTFOLIO OF INVESTMENTS
JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------
       PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)          DESCRIPTION                                    (NOTE 1)
- --------------------------------------------------------------------------------
               LONG-TERM INVESTMENTS--114.0%
               MORTGAGE PASS-THROUGHS--0.0%
               Federal National Mortgage Association,
      $    9     9.50%, 7/1/20 ..................................    $    9,132
               MULTIPLE CLASS MORTGAGE
               PASS-THROUGHS--14.3%
               Federal National Mortgage Association,
                 REMIC Pass-Through Certificates,
       1,580     Trust 1992-43, Class 43-E,
                   4/25/22 ......................................     1,594,244
       3,683     Trust 1992-129, Class 129-J,
                   7/25/20 ......................................     3,517,265
       1,444     Trust 1993-193, Class 193-E,
                   9/25/23 ......................................       698,015
         364     Trust 1993-193, Class 193-PC,
                   9/25/23 ......................................       358,932
         870     Trust 1993-212, Class 212-SA,
                   11/25/08, (ARM) ..............................       781,784
       2,005+    Trust 1993-214, Class 214-SL,
                   12/25/08, (ARM) ..............................     1,871,765
       1,000     Trust 1994-13, Class 13-SM,
                   2/25/09, (ARM) ...............................       931,250
         329     Trust 1994-37, Class 37-SC,
                   3/25/24, (ARM) ...............................       322,876
         980     Trust 1994-72, Class 72-L,
                   4/25/24 ......................................       981,938
AAA    2,000   New York City Mortgage Loan Trust,**
                 Ser. 1996, Class A-2, 6/25/11 ..................     1,945,000
                                                                    -----------
                                                                     13,003,069
                                                                    -----------

               INTEREST ONLY MORTGAGE-BACKED
               SECURITIES--14.1%
AAA   28,336   Credit Suisse First Boston Mortgage
                 Securities Corp.,**
                 Ser. 1997-C1, Class AX,
                   6/20/29 ......................................     2,573,541
       1,500   Federal Home Loan Mortgage Corp.,
                 Multiclass Mortgage
                 Participation Certificates,
                 Ser. 1543, Class 1543-VU,
                   4/15/23 ......................................       394,327
               Federal National Mortgage Association,
                 REMIC Pass-Through Certificates,
       2,500     Trust 1993-163, Class 163-PH,
                   3/25/22 ......................................       518,750
       2,312     Trust 1993-223, Class 223-PT,
                   10/25/23 .....................................       310,847
       2,500     Trust 1997-50, Class 50-HK,
                   8/25/27 ......................................       816,699
       6,755     Trust 1997-84, Class 84-PJ,
                   1/25/08 ......................................     1,563,331
       3,505     Trust 1998-44, Class 44-JI,
                   8/20/17 ......................................       396,461
       3,423     Trust 1998-62, Class 62-EI,
                   11/25/28 .....................................       526,361
AAA   19,770   First Union-Lehman Brothers-
                 Bank of America,
                 Ser. 1998-C2, Class IO,
                   5/18/28 ......................................       761,303
       2,446   Government National Mortgage
                 Association,
                 Trust 1998-24, Class 24-IB,
                   5/20/23 ......................................       544,276
AAA   11,794   Merrill Lynch Mortgage Investors Inc.,
                 Ser. 1997-C2, Class IO,
                   12/10/29 .....................................       806,296
AAA   15,741   Morgan (J.P.) Commercial Mortgage
                 Finance Corp.,**
                 Ser. 1997-C5, Class X,
                   9/15/29 ......................................     1,184,376
AAA    3,494   Morgan Stanley Capital 1 Inc.,**
                 Ser. 1997-HF1, Class X,
                   6/15/17 ......................................       292,910
AAA  135,000   Residential Funding Mortgage
                 Securities Inc.,
                 Ser. 1999-S14, Class A5B,
                   7/25/29 ......................................     2,109,375
                                                                    -----------
                                                                     12,798,853
                                                                    -----------
               PRINCIPAL ONLY MORTGAGE-BACKED
               SECURITIES--1.8%
               Collateralized Mortgage Obligation Trust,
AAA      630     Trust 26, Class A, 4/23/17 .....................       525,219
AAA       50     Trust 29, Class A, 5/23/17 .....................        39,679
         469   Federal Home Loan Mortgage Corp.,
                 Multiclass Mortgage
                 Participation Certificates,
                 Ser. 1946, Class 1946-N,
                   10/15/08 .....................................       368,040
               Federal National Mortgage Association,
                 REMIC Pass-Through Certificates,
       1,406     Trust 1993-225, Class 225-ME,
                   11/25/23 .....................................       560,642
         137     Trust 1997-85, Class 85-LE,
                   10/25/23 .....................................       120,223
                                                                    -----------
                                                                      1,613,803
                                                                    -----------

                       See Notes to Financial Statements.

                                       1
<PAGE>

- --------------------------------------------------------------------------------
      PRINCIPAL
        AMOUNT                                                          VALUE
RATING*  (000)          DESCRIPTION                                    (NOTE 1)
- --------------------------------------------------------------------------------
               COMMERCIAL MORTGAGE-BACKED
               SECURITIES--11.0%
A+    $1,000   Credit Suisse First Boston Mortgage
                 Securities Corp.,
                   Ser. 1995-AEW 1, Class C,
                   7.46%, 11/25/27 ..............................     $ 998,365
AAA    1,000   Deutsche Mortgage and Asset
                 Receiving Corp.,
                 Ser. 1998-C1, Class A2,
                   6.54%, 2/15/08 ...............................       965,838
BBB    1,000   DLJ Mortgage Acceptance Corp.,**
                 SER. 1997-CF1, CLASS B1,
                   7.91%, 4/15/07 ...............................       971,620
AAA       75   GMAC Commercial Mortgage
                 Securities Inc.,
                 Ser. 1998-C2, Class A2,
                   6.42%, 8/15/08 ...............................        72,541
AAA    1,000   Goldman Sachs Mortgage
                 Securities Corp.,
                 Ser. 1996-PL, Class A2,
                   7.41%, 2/15/27 ...............................     1,009,831
AAA      800   LTC Commercial Mortgage Corp.,**
                 Ser. 1996-1, Class A,
                   7.06%, 4/15/28 ...............................       798,620
               Merrill Lynch Mortgage Investors Inc.,
BBB    1,000     Ser. 1995-C1, Class D,
                   7.95%, 5/25/15 ...............................       982,881
BBB      500     Series 1996-C1, Class D,
                   7.42%, 4/25/28 ...............................       481,600
AAA      350   Mortgage Capital Funding Inc.,
                 Ser. 1998-MC2, Class A2,
                   6.42%, 5/18/08 ...............................       336,838
Aa2      431   Salomon Brothers Mortgage
                 Securities Corp.,**
                 Ser. 1997-TZH, Class A1,
                   7.15%, 3/25/25 ...............................       438,362
AA     2,635   Sears Mortgage Securities Corp.,
                 Ser. 1993-7, Class S3,
                   10.47%, 4/25/08, (ARM) .......................     2,453,007
AAA      500   Structured Asset Securities Corp.,
                 Ser. 1996-CFL, Class B,
                   6.30%, 2/25/28 ...............................       503,279
                                                                    -----------
                                                                     10,012,782
                                                                    -----------

               CORPORATE BONDS--16.8%
               FINANCE & BANKING--10.6%
A3     1,000   American Savings Bank,**
                 6.63%, 2/15/06 .................................       971,360
A      1,452   Equitable Life Assurance Society USA,**
                 Zero coupon, 12/1/99 - 12/1/05 .................       998,039
A      1,000   Lehman Brothers Holdings Inc.,
                 6.75%, 9/24/01 .................................       998,370
BB+    1,000   Macsaver Financial Services Inc.,
                 7.88%, 8/1/03 ..................................       830,000
BBB+   1,900   PaineWebber Group Inc.,
                 7.88%, 2/15/03 .................................     1,957,494
               Salomon Smith Barney Holdings Inc.,
Aa3    1,000     6.75%, 1/15/06 .................................       980,670
Aa3    1,425     7.98%, 3/1/00 ..................................     1,445,463
A-     1,485   Transamerica Finance Corp.,
                 6.75%, 6/1/00 ..................................     1,489,381
                                                                    -----------
                                                                      9,670,777
                                                                    -----------

               INDUSTRIALS--2.8%
AA-    1,000   TCI Communications Inc.,
                 8.25%, 1/15/03 .................................     1,054,270
Baa2   2,038   Union Pacific Corp.,**
                 Zero coupon, 11/1/99 - 5/1/05 ..................     1,455,254
                                                                    -----------
                                                                      2,509,524
                                                                    -----------
               UTILITIES--1.1%
A        1,000             ALLTEL CORP.,
                 7.50%, 3/1/06 ..................................     1,025,980
                                                                    -----------

               YANKEE--2.3%
BBB-   1,000   Empresa Electric Guacolda SA,**
                 7.95%, 4/30/03 .................................       908,551
BBB+     200   Empresa Electric Pehuhuenche,
                 7.30%, 5/1/03 ..................................       193,219
A-     1,000   Israel Electric Corp. Ltd.,**
                 7.25%, 12/15/06 ................................       958,610
                                                                    -----------
                                                                      2,060,380
                                                                    -----------
               Total Corporate Bonds ............................    15,266,661
                                                                    -----------

               ASSET-BACKED SECURITIES--2.6%
AAA      800   Chase Credit Card Master Trust,
                 Ser. 1997-5, Class A,
                   6.19%, 8/15/05 ...............................       791,732
NR       422   Global Rated Eligible Asset Trust,**/***
                 Ser. 1998-A, Class A1,
                   7.33%, 3/15/06 ...............................       229,843
AA       962   Pegasus Aviation Lease Securitization,**
                 Ser. 1999-1A,  Class A1,
                   6.30%, 3/25/29 ...............................       940,120
NR       899   Structured Mortgage Asset
                 Residential Trust,**/***
                   Ser. 1997-3, 8.57%,
                   4/15/06 ......................................       400,000
                                                                    -----------
                                                                      2,361,695
                                                                    -----------
               U.S. GOVERNMENT AND
               AGENCY SECURITIES--1.6%
       1,095   Small Business Administration,
                 Ser. 1998-P10, Class 10A,
                   6.12%, 2/1/08 ................................     1,056,405
         400   United States Treasury Notes,
                 5.50%, 5/15/09 .................................       390,748
                                                                    -----------
                                                                      1,447,153
                                                                    -----------

                       See Notes to Financial Statements.

                                       2
<PAGE>


      PRINCIPAL
        AMOUNT                                                         VALUE
RATING*  (000)          DESCRIPTION                                   (NOTE 1)
- --------------------------------------------------------------------------------
               ZERO COUPON BONDS--45.1%
     $12,407   Aid to Israel,
                 2/15/05 - 8/15/05 ..............................    $8,675,663
               Government Trust Certificates,
       5,220     Class 2-F, 5/15/05 .............................     3,651,755
      13,760     Class T-1, 5/15/05 .............................     9,377,578
      18,000++ United States Treasury Strips,
                 11/15/05 .......................................    12,361,500
      10,000   Vanguard Prime Money Market Strip,
                 12/31/04 .......................................     7,002,000
                                                                    -----------
                                                                     41,068,496
                                                                    -----------
               TAXABLE MUNICIPAL BONDS--6.6%
AAA    1,000   Alameda County California
                 Pension Obligation,
                 Zero coupon, 12/1/05 ...........................       653,700
AAA    1,000   Alaska Energy Power Authority Revenue,
                 Zero coupon, 7/1/05 ............................       755,090
AAA    1,433   Kern County California
                 Pension Obligation,
                 Zero coupon,
                   8/15/99 - 8/15/05 ............................     1,014,543
               Long Beach California
                 Pension Obligation,
AAA    1,441     Zero coupon, 9/1/99 - 9/1/05 ...................     1,018,351
AAA      500     7.09%, 9/1/09 ..................................       508,720
               Los Angeles County California
                 Pension Obligation,
AAA      406     Zero coupon, 12/31/99 - 6/30/05 ................       327,609
AAA    1,000     6.77%, 6/30/05 .................................       654,170
AAA    1,000     8.62%, 6/30/06 .................................     1,107,950
                                                                    -----------
                                                                      6,040,133
                                                                    -----------
      NOTIONAL
       AMOUNT
       (000)
      -------
               CALL OPTIONS PURCHASED--0.1%
      15,000   Interest Rate Swap,
                 5.60% over 3 month LIBOR,
                 expires 8/07/00
                 (cost $206,250) ................................        80,447
                                                                    -----------

               Total long-term investments
                 (cost $100,189,976) ............................   103,702,224
                                                                    -----------

                 SHORT-TERM INVESTMENT--1.5%
               DISCOUNT NOTES
       1,395   Federal Home Loan Mortgage Corp.,
                 4.60%, 7/1/99
                 (cost $1,395,000) ..............................     1,395,000
                                                                    -----------

               Total investments before outstanding
                 call option written--115.5%
                 (cost $101,584,976) ............................   105,097,224

       NOTIONAL
        AMOUNT
         (000)
        -------
               CALL OPTION WRITTEN--(0.0%)
     (24,000)    Interest Rate Swap,
                 3 month LIBOR over 5.50%,
                 expires 8/10/99
                 (premium received $147,000) ....................           (53)
                                                                    -----------

                 Total investments, net of
                   outstanding call option
                   written--115.5%
                    (cost $101,437,976) .........................   105,097,171
                 Liabilities in excess of
                   other assets (15.5)% .........................   (14,108,000)
                                                                    -----------

                 NET ASSETS--100% ...............................   $90,989,171
                                                                    ===========


- --------------------------------------------------------------------------------
  * Using the higher of Standard & Poor's, Moody's or Fitch's rating.
 ** Restricted securities as to resale.
*** Illiquid securities representing 0.6% of portfolio assets.
  + (Partial) principal amount pledged as collateral for reverse repurchase
    agreements.
 ++ Entire principal amount pledged as collateral for reverse repurchase
    agreements.


- --------------------------------------------------------------------------------
                              KEY TO ABBREVIATIONS

    ARM    -- Adjustable Rate Mortgage.
    LIBOR  -- London InterBank Offer Rate.
    REMIC  -- Real Estate Mortgage Investment Conduit.
- --------------------------------------------------------------------------------


                       See Notes to Financial Statements.

                                       3
<PAGE>

- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
STATEMENT OF ASSETS AND LIABILITIES
JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------


ASSETS
Investments, at value (cost $101,584,976)
  (Note 1) ............................................    $105,097,224
Interest receivable ...................................         799,494
Unrealized appreciation on interest rate swaps
  (Notes 1 and 3) .....................................             389
                                                           ------------
                                                            105,897,107
                                                           ------------

LIABILITIES
Reverse repurchase agreements (Note 4) ................      14,021,000
Due to custodian ......................................         384,449
Due to parent (Note 2) ................................         342,865
Interest payable ......................................         159,569
Call option written, at value
  (premium received $147,000) (Notes 1 and 3) .........              53
                                                           ------------
                                                             14,907,936
                                                           ------------
NET ASSETS ............................................    $ 90,989,171
                                                           ============

Net assets were comprised of:
  Common stock, at par (Note 5) .......................    $     95,107
  Paid-in capital in excess of par ....................      82,201,572
                                                           ------------
 ......................................................      82,296,679
  Undistributed net investment income .................       3,586,093
  Accumulated net realized gain .......................       1,446,815
  Net unrealized appreciation .........................       3,659,584
                                                           ------------
  Net assets, June 30, 1999 ...........................    $ 90,989,171
                                                           ============
Net asset value per share:
  ($90,989,171 / 9,510,667 shares of
  common stock issued and outstanding) ................          $ 9.57
                                                                 ======


- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
STATEMENT OF OPERATIONS
SIX MONTHS ENDED JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------


NET INVESTMENT INCOME
Income
  Interest earned (net of premium amortization
    of $787,684 and interest
    expense of $453,996) ..............................      $3,397,416
                                                            -----------
Operating expenses
  Investment advisory .................................         227,968
  Administration ......................................          45,594
  Custodian ...........................................          26,000
  Audit ...............................................          13,000
  Legal ...............................................          12,000
  Directors ...........................................          10,000
  Miscellaneous .......................................           8,303
                                                            -----------
    Total operating expenses ..........................         342,865
                                                            -----------
Net investment income .................................       3,054,551
                                                            -----------

REALIZED AND UNREALIZED GAIN (LOSS) ON
  INVESTMENTS (NOTE 3)
Net realized gain (loss) on:
  Investments .........................................         (62,867)
  Futures .............................................         487,973
  Short sales .........................................         211,914
  Interest rate swaps .................................         (50,708)
                                                            -----------
                                                                586,312
                                                            -----------
Net change in unrealized appreciation (depreciation) on:
  Investments .........................................      (5,304,377)
  Options written .....................................         260,092
  Futures .............................................           7,136
  Short sales .........................................         333,514
  Interest rateswaps ..................................         (81,267)
                                                            -----------
                                                             (4,784,902)
                                                            -----------
Net loss on investments ...............................      (4,198,590)
                                                            -----------

NET DECREASE IN NET ASSETS
  RESULTING FROM OPERATIONS ...........................     $(1,144,039)
                                                            ===========


                       See Notes to Financial Statements.

                                       4
<PAGE>

- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
STATEMENT OF CASH FLOWS
SIX MONTHS ENDED JUNE 30, 1999 (UNAUDITED)
- --------------------------------------------------------------------------------


RECONCILIATION OF NET DECREASE IN NET ASSETS
  RESULTING FROM OPERATIONS TO NET CASH FLOWS
  PROVIDED BY OPERATING ACTIVITIES
Net decrease in net assets resulting
  from operations ....................................     $ (1,144,039)
                                                           ------------
Increase in investments ..............................          (16,287)
Net realized gain ....................................         (586,312)
Decrease in unrealized appreciation ..................        4,784,902
Increase in interest receivable ......................         (106,382)
Decrease in deposits with brokers for
  investments sold short .............................        9,203,750
Decrease in unrealized appreciation of
  interest rate swap .................................           81,267
Decrease in due to broker-variation margin ...........           (6,593)
Decrease in payable for investments sold short .......       (9,044,960)
Decrease in call options written .....................         (532,843)
Decrease in interest payable .........................          (77,092)
Increase in accrued expenses and
  other liabilities ..................................          562,495
                                                           ------------
Total adjustments ....................................        4,261,945
                                                           ------------
Net cash flows provided by operating activities ......     $  3,117,906
                                                           ============

INCREASE (DECREASE) IN CASH
Net cash flows provided by operating activities ......     $ 3,117,906
                                                           -----------
 Cash flows used for financing activities:
  Decrease in reverse repurchase agreements ..........       (3,169,000)
                                                           ------------
  Net decrease in cash ...............................          (51,094)
                                                           ------------

  Cash at beginning of period ........................           51,094
                                                           ------------
  Cash at end of period ..............................     $         --
                                                           ============

- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
STATEMENT OF CHANGES
IN NET ASSETS (UNAUDITED)
- --------------------------------------------------------------------------------

                                                       FOR THE PERIOD
                                                      OCTOBER 31, 1998*
                                SIX MONTHS ENDED              TO
                                    JUNE 30,              DECEMBER 31,
                                      1999                    1998
                                 --------------        ----------------

INCREASE  (DECREASE) IN
    NET ASSETS

Operations:


  Net investment income ........   $ 3,054,551              $ 531,542


  Net realized gain on
    investments ................       586,312                860,503


  Net change in unrealized
    appreciation/(depreciation)
    on investments .............    (4,784,902)             8,444,486
                                   -----------            -----------


  Net increase (decrease) in net
    assets resulting from
    operations .................    (1,144,039)             9,836,531


  Transfer of assets from BAT
    in exchange for
    shares issued ..............            --             82,296,679
                                   -----------            -----------
TOTAL INCREASE (DECREASE) ......    (1,144,039)            92,133,210



NET ASSETS

Beginning of period ............    92,133,210                    --
                                   -----------           -----------

End of period ..................  $ 90,989,171           $92,133,210
                                  ============           ===========


- ----------
* Commencement of investment operations.


                       See Notes to Financial Statements.

                                       5
<PAGE>


- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
FINANCIAL HIGHLIGHTS (UNAUDITED)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                                         FOR THE PERIOD
                                                                                                        OCTOBER 31, 1998*
                                                                                      SIX MONTHS ENDED       THROUGH
                                                                                          JUNE 30,        DECEMBER 31,
                                                                                            1999              1998
                                                                                       --------------     ------------
<S>                                                                                       <C>               <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period ..................................................   $  9.69           $  8.65
                                                                                          -------           -------
   Net investment income (net of interest expense of $0.03 and $0.05, respectively) ...      0.32              0.06
   Net realized and unrealized gain (loss) ............................................     (0.44)             0.98
                                                                                          -------           -------
Net increase (decrease) from investment operations ....................................     (0.12)             1.04
                                                                                          -------           -------
Net asset value, end of period ........................................................   $  9.57           $  9.69
                                                                                          =======           =======
TOTAL INVESTMENT RETURN:+ .............................................................     (1.24)%           12.02%
                                                                                          =======           =======
RATIOS TO AVERAGE NET ASSETS:
Operating expenses** ..................................................................      0.75%++           0.89%++
Net investment income .................................................................      6.72%++           3.50%++
SUPPLEMENTAL DATA:
Average net assets (in thousands) .....................................................   $91,668           $90,986
Portfolio turnover ....................................................................         8%                3%
Net assets, end of period (in thousands) ..............................................   $90,989           $92,133
Reverse repurchase agreements outstanding,
   end of period (in thousands) .......................................................   $14,021           $17,190
Asset coverage+++ .....................................................................   $ 7,489           $ 6,369
</TABLE>

- ----------
   * Commencement of investment operations.
  ** The ratios of operating  expenses,  including interest expense,  to average
     net  assets  was  2.57%++  and  1.75%++  for the  period  indicated  above,
     respectively.  The ratios of operating expenses, including interest expense
     and excise tax, to average  net assets was  2.76%++  and  1.75%++,  for the
     period indicated above, respectively.
   + This entity is not publicly traded and therefore total investment return is
     calculated  assuming a purchase  of common  stock at the  current net asset
     value on the first day and a sale at the net asset value on the last day of
     the period reported.  Total investment  return for periods of less than one
     full year are not annualized.
  ++ Annualized.
 +++ Per $1,000 of reverse repurchase agreement outstanding.
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.



                       See Notes to Financial Statements.

                                       6


<PAGE>

- --------------------------------------------------------------------------------
BAT SUBSIDIARY, INC.
NOTES TO FINANCIAL STATEMENTS (UNAUDITED)
- --------------------------------------------------------------------------------

NOTE 1. ORGANIZATION &   POLICIES

BAT Subsidiary, Inc. (the ACCOUNTING "Trust") was incorporated under the laws of
the state of  Maryland  on August 10,  1998,  and is a  diversified,  closed-end
management investment company. The Trust was incorporated solely for the purpose
of  receiving  all or a  substantial  portion  of the  assets  of The  BlackRock
Advantage Term Trust Inc.,  ("BAT")  incorporated under the laws of the state of
Maryland  and  as  such,  is a  wholly-owned  subsidiary  of  BAT.  The  Trust's
investment  objective is to manage a portfolio of investment  grade fixed income
securities  while  providing  cash flow  definition  to BAT. No assurance can be
given that the Trust's investment objective will be achieved.

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

SECURITIES VALUATION:  The Trust values mortgage-backed,  asset-backed and other
debt  securities,  interest rate swaps,  caps,  floors and  non-exchange  traded
options on the basis of current market quotations provided by dealers or pricing
services approved by the Trust's Board of Directors. In determining the value of
a particular security, pricing services may use certain information with respect
to transactions in such securities, quotations from dealers, market transactions
in comparable  securities,  various relationships observed in the market between
securities, and calculated yield measures based on valuation technology commonly
employed in the market for such securities.  Exchange-traded  options are valued
at their last sales price as of the close of options  trading on the  applicable
exchanges.  In the absence of a last sale,  options are valued at the average of
the quoted bid and asked prices as of the close of business.  A futures contract
is valued at the last sale price as of the close of the commodities  exchange on
which it trades unless the Trust's Board of Directors determines that such price
does not  reflect  its fair  value,  in which case it will be valued at its fair
value as determined by the Trust's Board of Directors.  Any  securities or other
assets for which such current market  quotations  are not readily  available are
valued at fair value as determined in good faith under procedures established by
and under the general  supervision  and  responsibility  of the Trust's Board of
Directors.

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

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

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

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

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


                                       7
<PAGE>

purchased to effectively  hedge a position or a portfolio against price declines
if a portfolio  is long.  In the same sense,  call  options can be  purchased to
hedge a portfolio that is shorter than its benchmark against price changes.  The
Trust can also sell (or write)  covered  call  options  and put options to hedge
portfolio positions.

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

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

   During the term of the swap,  changes in the value of the swap are recognized
as unrealized gains or losses by "marking-to-market" to reflect the market value
of the swap. When the swap is terminated,  the Trust will record a realized gain
or loss  equal to the  difference  between  the  proceeds  from (or cost of) the
closing transaction and the Trust's basis in the contract, if any.

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

SWAP  OPTIONS:  Swap  options are similar to options on  securities  except that
instead of  purchasing  the right to buy a security,  the  purchaser of the swap
option has the right to enter into a previously  agreed upon  interest rate swap
agreement at any time before the expiration of the option.  Premiums received or
paid from writing or purchasing  options which expire unexercised are treated by
the Trust on the  expiration  date as realized  gains or losses.  The difference
between the  premium  and the amount  paid or  received  on  effecting a closing
purchase or sale transaction,  including brokerage commissions,  is also treated
as a realized  gain or loss.  If an option is  exercised,  the  premium  paid or
received  is added to the  proceeds  from  the sale or cost of the  purchase  in
determining  whether  the  Trust  has  realized  a gain or a loss on  investment
transactions.  The Trust,  as writer of an option,  bears the market  risk of an
unfavorable  change in the value of the swap  contract  underlying  the  written
option.  Interest  rate swap options may be used as part of an income  producing
strategy  reflecting  the view of the Trust's  management  on the  direction  of
interest rates.

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

   Swap  options may be used by the Trust to manage the  duration of the Trust's
portfolio in a manner similar to more generic options described above.

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

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

   The Trust may invest in financial futures contracts primarily for the purpose
of hedging its existing portfolio  securities or securities the Trust intends to
purchase  against  fluctuations in value caused by changes in prevailing  market
interest  rates.  Should  interest  rates move  unexpectedly,  the Trust may not
achieve the  anticipated  benefits of the  financial  futures  contracts and may
realize a loss. The use of futures  transactions  involves the risk of imperfect
correlation in movements in the price of futures  contracts,  interest rates and
the  underlying  hedged  assets.  The Trust is also at risk of not being able to
enter into a closing transaction for the futures contract because of an illiquid
secondary market.  In addition,  since futures are used to shorten or lengthen a
portfolio's  duration,  there is a risk that the portfolio may have  temporarily
performed better without the hedge or that the Trust may lose the opportunity to
realize  appreciation  in the market price of the  underlying  positions.  SHORT
SALES:  The Trust may make  short  sales of  securities  as a method of  hedging
potential  price declines in similar  securities  owned.  When the Trust makes a
short  sale,  it may  borrow  the  security  sold  short and  deliver  it to the
broker-dealer  through  which  it made  the  short  sale as  collateral  for its
obligation  to deliver the security upon  conclusion of the sale.  The Trust may
have to pay a fee to borrow the  particular  securities  and may be obligated to
pay over any payments received on such borrowed  securities.  A gain, limited to
the price at which the Trust sold the security short, or a loss, unlimited as to
dollar amount,  will be recognized  upon the  termination of a short sale if the
market  price  is  less  or  greater  than  the  proceeds  originally  received.

SECURITIES  LENDING:  The Trust may lend its  portfolio  securities to qualified
institutions.  The loans are secured by collateral at least equal, at all times,
to the market  value of the  securities  loaned.  The Trust may bear the risk of
delay in recovery of, or even loss of rights in, the  securities  loaned  should
the borrower of the securities fail financially. The Trust receives compensation
for lending its  securities in the form of interest on the loan.  The Trust also
continues to receive interest on the securities  loaned, and any gain or loss in
the market price of the securities  loaned that may occur during the term of the
loan  will be for the  account  of the  Trust.  The  Trust  did  not  engage  in
securities  lending  during the six months  ended June 30, 1999.

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

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

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

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

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

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

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

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

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

TAXES: It is the Trust's  intention to continue to meet the  requirements of the
Internal  Revenue Code  applicable  to  regulated  investment  companies  and to
distribute  substantially  all taxable  income to  shareholders.  Therefore,  no
federal income tax provision is required.  As part of its tax planning strategy,
the Trust  intends to retain a portion of its  taxable  income and pay an excise
tax on the undistributed amounts.

   Income  distributions  and  capital  gain  distributions  are  determined  in
accordance with income tax regulations which may differ from generally  accepted
accounting  principles.  ESTIMATES:  The preparation of financial  statements in
conformity with generally accepted accounting  principles requires management to
make estimates and  assumptions  that affect the reported  amounts of assets and
liabilities  and disclosure of contingent  assets and liabilities at the date of
the  financial  statements  and the  reported  amounts of revenues  and ex-


                                       9
<PAGE>

penses  during the  reporting  period.  Actual  results  could differ from those
estimates.


NOTE 2. AGREEMENTS

The  Trust  has  an  Investment  Advisory  Agreement  with  BlackRock  Financial
Management,  Inc.,  (the  "Adviser"),  a wholly owned  corporate  subsidiary  of
BlackRock Advisors, Inc., which is an indirect majority-owned  subsidiary of PNC
Bank,  N.A., and an  Administration  Agreement with Prudential  Investments Fund
Management, LLC ("PIFM"), an indirect, wholly-owned subsidiary of The Prudential
Insurance Co. of America.

The Trust  reimburses  the BAT for its pro-rata  share of  applicable  expenses,
including investment advisory and administrative fees, in an amount equal to the
proportionate  amount of average net assets which are held by the Trust relative
to the average net assets of the BAT.


NOTE 3. PORTFOLIO   SECURITIES

Purchases  and  sales  of  invest-  ment   securities,   other  than  short-term
investments and dollar rolls,  for the six months ended June 30, 1999 aggregated
$14,461,394 and $7,808,017, respectively.

   The Trust may invest up to 85% of its total  assets in  securities  which are
not readily  marketable,  including those which are restricted as to disposition
under securities law ("restricted securities"). At June 30, 1999, the Trust held
0.6% of its portfolio assets in illiquid securities.

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

   The federal income tax basis of the Trust's  investments at June 30, 1999 was
$101,584,976 and,  accordingly,  net unrealized  appreciation for federal income
tax purposes was $3,512,248  (gross unrealized  appreciation--$5,708,039;  gross
unrealized depreciation--$2,195,791).


   Details of open interest rate swaps at June 30, 1999 are as follows:

NOTIONAL                     FIXED/
 AMOUNT                     FLOATING     FLOATING    TERMINATION    UNREALIZED
  (000)        TYPE           RATE         RATE         DATE      APPRECIATION
- --------      -----       ------------    ------     ----------  ------------
$5,000    Floating Rate   3 Mo. T-Bill  3 Mo. LIBOR    9/10/03          $209
                          + 80.25 bps
 5,000    Floating Rate   3 Mo. T-Bill  3 Mo. LIBOR    9/10/03           180
                          + 81.75 bps                                   ----
                                                                        $389
                                                                        ====

NOTE 4. BORROWINGS

REVERSE  REPURCHASE  AGREEMENTS:  The Trust may enter  into  reverse  repurchase
agreements with qualified, third party broker-dealers as determined by and under
the  direction  of the  Trust's  Board of  Directors.  Interest  on the value of
reverse  repurchase  agreements  issued  and  outstanding  will  be  based  upon
competitive  market rates at the time of issuance.  At the time the Trust enters
into a reverse repurchase agreement, it will establish and maintain a segregated
account with the lender, the value of which at least equals the principal amount
of the reverse repurchase transactions including accrued interest.

   The average daily balance of reverse repurchase agreements outstanding during
the  period  ended June 30,  1999 was  approximately  $15,776,865  at a weighted
average  interest rate of  approximately  4.82%.  The maximum  amount of reverse
repurchase agreements  outstanding at any month-end during the period ended June
30, 1999 was $20,163,500 as of January 31, 1999 which was 16.4% of total assets.

DOLLAR  ROLLS:  The Trust may enter into  dollar  rolls in which the Trust sells
securities  for delivery in the current  month and  simultaneously  contracts to
repurchase  substantially similar (same type, coupon and maturity) securities on
a specified future date.  During the roll period the Trust forgoes principal and
interest paid on the  securities.  The Trust will be compensated by the interest
earned on the cash  proceeds  of the  initial  sale and by the lower  repurchase
price at the future  date.  The Trust did not enter into dollar rolls during the
six months ended June 30, 1999.


NOTE 5. CAPITAL

There are 200 million  shares of $.01 par value  common  stock  authorized.  BAT
owned all of the 9,510,667 shares outstanding at June 30, 1999.



                                       10
<PAGE>
- --------------------------------------------------------------------------------
BlackRock
- --------------------------------------------------------------------------------
DIRECTORS
Laurence D. Fink, CHAIRMAN
Andrew F. Brimmer
Richard E. Cavanagh
Kent Dixon
Frank J. Fabozzi
James Grosfeld
James Clayburn La Force, Jr.
Walter F. Mondale
Ralph L. Schlosstein

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

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

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

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

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

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


   The  accompanying  financial  statements as of June 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.



                              BAT SUBSIDIARY, 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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