Exhibit 99(a)(5)(iii)

(BULL LOGO)
Merrill Lynch Investment Managers


Semi-Annual Report

February 28, 2001



Merrill Lynch
Senior Floating
Rate Fund II, Inc.


www.mlim.ml.com


Merrill Lynch Senior Floating Rate Fund II, Inc. seeks as high a
level of current income and such preservation of capital as is
consistent with investment in senior collateralized corporate loans
made by banks and other financial institutions.

This report, including the financial information herein, is
transmitted for use to shareholders of Merrill Lynch Senior Floating
Rate Fund II, Inc. for their information. It is not a prospectus.
Past performance results shown in this report should not be
considered a representation of future performance. The Fund has the
ability to leverage its Common Stock to provide Common Stock
shareholders with a potentially higher rate of return. Leverage
creates risk for Common Stock shareholders, including the likelihood
of greater volatility of net asset value and market price of Common
Stock shares, and the risk that fluctuations in short-term interest
rates may reduce the Common Stock's yield. Statements and other
information herein are as dated and are subject to change.


Merrill Lynch Senior Floating
Rate Fund II, Inc.
Box 9011
Princeton, NJ
08543-9011


Printed on post-consumer recycled paper



Merrill Lynch Senior Floating Rate Fund II, Inc.


DEAR SHAREHOLDER

Investment Approach
Merrill Lynch Senior Floating Rate Fund II, Inc. consists largely of
participations in leveraged bank loans. These loans are generally
senior secured floating rate investments. In response to general
economic events and trends, the bank loan market tends to move in a
similar direction, but with less volatility, as the high-yield bond
market. The linkage between the two markets can be ascribed to the
fact that the issuers of debt, as well as the buyers of that debt,
tend to participate in both markets (based on similar credit rating
and risk/reward profiles of the markets). The lower price volatility
of bank loan investments can be attributed to two factors. First,
bank loans are usually senior secured obligations and, thus,
generally offer investors greater principal protection than
unsecured bonds. Second, bank loans are floating rate instruments
whose principal value does not move inversely with interest rate
movements, as is the case with fixed-income bonds.

Fund Performance
The Fund's effective net annualized yield for the six-month period
ended February 28, 2001 was 8.61%, compared to a yield of 7.48% for
the same period a year earlier. The Fund's net asset value decreased
from $9.87 per share to $9.65 per share during the period. During
the same period, the Fund earned $0.412 per share income dividends,
representing a net annualized yield of 8.61%, based on a per share
net asset value of $9.65 at February month-end. The Fund's total
investment return during the six-month period ended February 28,
2001 was +1.98%, based on a $0.22 per share decrease in net asset
value and assuming reinvestment of $0.418 per share income
dividends. Since inception (March 26, 1999) through February 28,
2001, the Fund's total investment return was +11.93%, based on a
change in per share net asset value from $10.00 to $9.65, and
assuming reinvestment of $1.456 per share income dividends.

The Fund's total return of +1.98% for the six-month period ended
February 28, 2001 underperformed the unmanaged CS First Boston
Leveraged Loan Index, which had a return of +2.79%. During this
period, the Fund was underweighted relative to the Index in energy
and healthcare issues, two sectors that outperformed. The energy
sector benefited from the dramatic rise in commodity prices, while
the healthcare sector rebounded from its earlier very depressed
levels. The Fund was only slightly underweighted in energy (0.33% of
total assets compared to 0.47% in the Index) but, reflecting our
unfavorable experience with that sector in recent years, was
significantly underweighted in healthcare (0.82% compared to 9.4% in
the Index).


Market Review
The six-month period ended February 28, 2001 was marked by two
distinct trends in the high-yield and leveraged loan markets. During
the second half of 2000, these markets operated in a very negative
credit environment, culminating in total withdrawals from high-yield
mutual funds in excess of $10 billion for the year 2000. In 2001,
the markets began to rally in response to the Federal Reserve
Board's early interest rate cuts. Flows into the high-yield market
reversed course after the interest rate cuts and, through February,
total year-to-date inflows amounted to $3.25 billion. Since many
investors in the high-yield market also participate in the bank loan
market, the increased demand for leveraged finance product caused by
this additional market liquidity resulted in an increase in market
prices. Additionally, during the first two months of 2001, high-
yield spreads rebounded from a near record of 959 basis points
(9.59%) at year-end 2000, as measured by the unmanaged CS First
Boston Global High Yield Index, to 830 basis points (considerably
higher than the historic average of 529 basis points and the year-
end 1999 figure of 549 basis points.)



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


Despite the improved tone of the market, there continues to be
concern about the overall default rate. During 1999, Moody's
Investors Service's dollar-weighted default rate for high-yield
bonds peaked at 7.8%, its highest level since 1991, before falling
back down to 6.2% by December 31, 2000. We believe that in 2001
default rates will yet again increase in response to the weakening
of certain sectors, including wired telecommunications and autos.
This expected increase is in line with historical trends, which show
that of the high-yield issues that eventually default, the majority
do so within three years - four years of issuance. Counting back
three years - four years from 2001 brings us back to the 1997 - 1998
period, which was generally characterized by lower credit standards
than existed in the years hence. Therefore, we believe that should
the historical trend hold, defaults could be expected to rise in
2001 from year-end 2000 levels, before falling back to more typical
levels in 2002.

Investment Activities
Pricing pressure in the apparel, computer-related products, and
automotive sectors had the greatest negative effect on the Fund
during the period. In both apparel and computer-related products,
the majority of the impact was primarily derived from one credit,
while the problems in the automotive sector stemmed from an
industrywide decline in revenues in a rising expense environment. In
apparel, the bulk of the losses stemmed from our position in Warnaco
Inc., a manufacturer of jeans, athletic wear and intimate apparel.
Warnaco, which had been facing a lawsuit with its licensor, Calvin
Klein, continues to feel the impact of a weak overall environment
for retail and apparel companies. In the computer-related sector,
Bridge Information Systems also endured a precipitous decline.
Bridge, a provider of proprietary financial information services to
the equity markets, filed for bankruptcy during the period as a
result of poor billing and collection practices, and acquisition
integration issues. As for the automotive equipment suppliers in our
portfolio, their use of aggressive pricing coupled with a business
model using lower production volumes left them unprepared for
overtime and adequate maintenance. The problems were further
aggravated by demands for price cuts by their customers, the
original equipment manufacturers.

On the positive side, the Fund continues to be anchored by
substantial investment in wireless telecommunications (13.2% of
total assets), broadcasting (11.5%), cable television services (10%)
and hotels and motels (4.6%). These sectors are characterized by
significant asset values and strong cashflow. At February 28, 2001,
the Fund's largest holdings were comprised largely of
representatives from these sectors, including VoiceStream PCS
Holdings Corp., Nextel Communications, Inc., Entravision, Charter
Communications Holdings, Century Cable LLC and Wyndham
International, Inc. (For complete details of the Fund's largest
holdings and industries, see the "Portfolio Profile" section of this
report to shareholders on page 9.)


Investment Strategy
Thus far in 2001, we have seen some relief from the technical
aspects of the pricing pressure that had impacted the market so
significantly in 2000. This occurrence has allowed us to set the
course toward a reversal of the downward trend in the net asset
value by creating the liquidity needed to participate in a market
rally. Specifically, during this period, we have exited certain
lower-coupon issues that have regained par or near-par pricing
levels after a prolonged period of sub-par market values. Any
liquidity created in excess of what was needed to meet redemption
demand will allow for new, value-additive investment. We have begun
to redeploy some of the funds into the new-issue market, which
continues to offer attractive spreads and original issue discounts,
as well as in certain secondary situations where we still see value.

We believe the Fund continues to be well-balanced with 84 issuers
spread across 33 industries. The Fund also has an attractive ratings
profile as compared to the Index. The Fund was overweighted relative
to the Index in Ba-rated securities (55.7% of total assets compared
to 48.6%), overweighted in B-rated securities (28.5% compared to
25.4%), underweighted in Caa-rated securities (1.1% compared to
4.4%) and underweighted in securities not rated (14.7% compared to
19.3%).


In Conclusion
We believe that, with adequate diversification and a solid credit
profile as its base, we can better position the Fund to take greater
advantage of any sustained reversal of technical price pressures on
the leveraged finance market. Our ability to bring this to fruition
will be challenged, as always, by any significant changes in
fundamental credit aspects of its issuers as well as the need to
meet future shareholder redemptions.



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


We thank you for your investment in Senior Floating Rate Fund II,
Inc. and we look forward to reviewing our outlook and strategy with
you again in our next report to shareholders.

Sincerely,



(Terry K. Glenn)
Terry K. Glenn
President and Director/Trustee



(Kevin J. Booth)
Kevin J. Booth
Vice President and Portfolio Manager



(Joseph Matteo)
Joseph Matteo
Vice President and Portfolio Manager


April 10, 2001


We are pleased to announce that Kevin J. Booth and Joseph Matteo are
responsible for the day-to-day management of Merrill Lynch Senior
Floating Rate Fund II, Inc. Mr. Booth has been employed by Merrill
Lynch Investment Managers, L.P. ("MLIM") as Director since 1998 and
Vice President from 1991 to 1998. Mr. Matteo has been employed by
MLIM as Director since 2001 and as Vice President from 1997 to 2001.
Prior to that, Mr. Matteo was Vice President at The Bank of New York
from 1994 to 1997.




The Benefits and Risks of Leveraging


Merrill Lynch Senior Floating Rate Fund II, Inc. has the ability to
utilize leverage through the borrowings or issuance of short-term
debt securities or shares of Preferred Stock. The concept of
leveraging is based on the premise that the cost of assets to be
obtained from leverage will be based on short-term interest rates,
which normally will be lower than the return earned by the Fund on
its longer-term portfolio investments. To the extent that the total
assets of the Fund (including the assets obtained from leverage) are
invested in higher-yielding portfolio investments, the Fund's Common
Stock shareholders will benefit from the incremental yield.

Leverage creates risks for holders of Common Stock including the
likelihood of greater net asset value and market price volatility.
In addition, there is the risk that fluctuations in interest rates
on borrowings (or in the dividend rates on any Preferred Stock, if
the Fund were to issue the Preferred Stock) may reduce the Common
Stock's yield and negatively impact its market price. If the income
derived from securities purchased with assets received from leverage
exceeds the cost of leverage, the Fund's net income will be greater
than if leverage had not been used. Conversely, if the income from
the securities purchased is not sufficient to cover the cost of
leverage, the Fund's net income will be less than if leverage had
not been used, and therefore the amount available for distribution
to Common Stock shareholders will be reduced. In this case, the Fund
may nevertheless decide to maintain its leveraged position in order
to avoid capital losses on securities purchased with leverage.
However, the Fund will not generally utilize leverage if it
anticipates that its leveraged capital structure would result in a
lower rate of return for its Common Stock than would be obtained if
the Common Stock were unleveraged for any significant amount of
time.



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION


Statement of Assets and Liabilities                                     Merrill Lynch Senior Floating Rate Fund II, Inc.

                    As of February 28, 2001
                                                                                                
Assets:             Investment in Master Senior Floating Rate Trust, at value
                    (identified cost--$435,004,508)                                                      $   422,632,807
                    Prepaid registration fees and expenses                                                       194,241
                                                                                                         ---------------
                    Total assets                                                                             422,827,048
                                                                                                         ---------------

Liabilities:        Payables:
                      Distributions to shareholders                                   $      745,015
                      Administrator                                                          114,204             859,219
                                                                                     ---------------
                    Accrued expenses and other liabilities                                                       230,136
                                                                                                         ---------------
                    Total liabilities                                                                          1,089,355
                                                                                                         ---------------

Net Assets:         Net assets                                                                           $   421,737,693
                                                                                                         ===============

Net Assets          Common Stock, par value $.10 per share; 1,000,000,000 shares
Consist of:         authorized                                                                           $     4,371,464
                    Paid-in capital in excess of par                                                         432,667,457
                    Accumulated realized capital losses on investments from the
                    Trust--net                                                                               (2,929,527)
                    Unrealized depreciation on investments from the Trust--net                              (12,371,701)
                                                                                                         ---------------
                    Net Assets--Equivalent to $9.65 per share based on shares of
                    43,714,642 capital stock outstanding                                                 $   421,737,693
                                                                                                         ===============

                    See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION (CONTINUED)


Statement of Operations                                                Merrill Lynch Senior Floating Rate Fund II, Inc.

                    For the Six Months Ended February 28, 2001++
                                                                                                
Investment          Interest and discount earned                                                         $     4,312,706
Income:             Facility and other fees                                                                       25,910
                    Investment income allocated from the Trust                                                17,878,723
                    Expenses allocated from the Trust                                                        (1,888,854)
                                                                                                         ---------------
                    Total income and net investment income from the Trust                                     20,328,485
                                                                                                         ---------------

Expenses:           Administration fee                                                $      875,757
                    Investment advisory fees                                                 406,561
                    Registration fees                                                         82,285
                    Tender offer fees                                                         76,810
                    Transfer agent fees                                                       74,590
                    Professional fees                                                         61,471
                    Printing and shareholder reports                                          39,282
                    Accounting services                                                       24,711
                    Directors' fees and expenses                                              14,701
                    Assignment fees                                                            2,667
                    Custodian fees                                                             1,084
                    Other                                                                      4,564
                                                                                     ---------------
                    Total expenses                                                                             1,664,483
                                                                                                         ---------------
                    Investment income--net                                                                    18,664,002
                                                                                                         ---------------

Realized &          Realized gain:
Unrealized Gain       On investments--net                                                     38,989
(Loss) on             From the Trust--net                                                    210,381             249,370
Investments                                                                          ---------------
and from            Change in unrealized appreciation/depreciation:
the Trust--Net:       On investments--net                                                (2,442,826)
                      From the Trust--net                                                (7,859,192)        (10,302,018)
                                                                                     ---------------     ---------------
                    Net Increase in Net Assets Resulting from Operations                                 $     8,611,354
                                                                                                         ===============


++On October 6, 2000, the Fund converted from a stand-alone
investment company to a "feeder" fund that seeks to achieve its
investment objective by investing all of its assets in the Trust, a
mutual fund that has the same investment objective as the Fund. All
investments will be made at the Trust level. This structure is
sometimes called a "master/feeder" structure.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION (CONTINUED)


Statements of Changes in Net Assets                                     Merrill Lynch Senior Floating Rate Fund II, Inc.

                                                                                       For the Six           For the
                                                                                       Months Ended         Year Ended
                                                                                       February 28,         August 31,
Increase (Decrease) in Net Assets:                                                        2001++               2000
                                                                                               
Operations:         Investment income--net                                           $    18,664,002     $    27,549,122
                    Realized gain (loss)on investments from the Trust--net                   249,370         (3,173,858)
                    Change in unrealized appreciation/depreciation on
                    investments from the Trust--net                                     (10,302,018)         (2,119,451)
                                                                                     ---------------     ---------------
                    Net increase in net assets resulting from operations                   8,611,354          22,255,813
                                                                                     ---------------     ---------------

Dividends           Investment income--net                                              (18,664,002)        (27,549,122)
to Shareholders:                                                                     ---------------     ---------------
                    Net decrease in net assets resulting from dividends
                    to shareholders                                                     (18,664,002)        (27,549,122)
                                                                                     ---------------     ---------------

Capital Share       Net increase (decrease) in net assets derived from
Transactions:       capital share transactions                                          (10,217,998)         217,875,943
                                                                                     ---------------     ---------------

Net Assets:         Total increase (decrease) in net assets                             (20,270,646)         212,582,634
                    Beginning of period                                                  442,008,339         229,425,705
                                                                                     ---------------     ---------------
                    End of period                                                    $   421,737,693     $   442,008,339
                                                                                     ===============     ===============


++On October 6, 2000, the Fund converted from a stand-alone
investment company to a "feeder" fund that seeks to achieve its
investment objective by investing all of its assets in the Trust, a
mutual fund that has the same investment objective as the Fund. All
investments will be made at the Trust level. This structure is
sometimes called a "master/feeder" structure.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION (CONCLUDED)


Financial Highlights                                                 Merrill Lynch Senior Floating Rate Fund II, Inc.

                                                                                                              For the
                                                                                For the         For the        Period
                                                                               Six Months         Year        March 26,
The following per share data and ratios have been derived                        Ended            Ended       1999++ to
from information provided in the financial statements                         February 28,     August 31,     August 31,
Increase (Decrease) in Net Asset Value:                                         2001+++++         2000            1999
                                                                                                    
Per Share           Net asset value, beginning of period                        $   9.87        $  10.01        $  10.00
Operating                                                                       --------        --------        --------
Performance:        Investment income--net                                           .41             .77             .27
                    Realized and unrealized gain (loss) on
                    investments from the Trust--net                                (.22)           (.14)             .01
                                                                                --------        --------        --------
                    Total from investment operations                                 .19             .63             .28
                    Less dividends from investment income--net                     (.41)           (.77)           (.27)
                                                                                --------        --------        --------
                    Net asset value, end of period                              $   9.65        $   9.87        $  10.01
                                                                                ========        ========        ========

Total Investment    Based on net asset value per share                          1.98%+++           6.54%        3.02%+++
Return:**                                                                       ========        ========        ========

Ratio to Average    Expenses, net of reimbursement++++                            1.62%*           1.58%           .55%*
Net Assets:                                                                     ========        ========        ========
                    Expenses++++                                                  1.62%*           1.68%          1.77%*
                                                                                ========        ========        ========
                    Investment income--net                                        8.52%*           7.80%          6.77%*
                                                                                ========        ========        ========

Supplemental        Net assets, end of period (in millions)                     $    422        $    442        $    229
Data:                                                                           ========        ========        ========
                    Portfolio turnover                                                --          46.95%          28.49%
                                                                                ========        ========        ========

*Annualized.
**Total investment returns exclude the early withdrawal charge, if
any. The Fund is a continuously offered closed-end fund, the shares
of which are offered at net asset value. Therefore, no separate
market exists. The Fund's investment adviser waived a portion of its
management fee. Without such waiver, the Fund's returns would have
been lower.
++Commencement of operations.
++++Includes the Fund's share of the Trust's allocated expenses.
+++Aggregrate total investment return.
+++++On October 6, 2000, the Fund converted from a stand-alone
investment company to a "feeder" fund that seeks to achieve its
investment objective by investing all of its assets in the Trust, a
mutual fund that has the same investment objective as the Fund. All
investments will be made at the Trust level. This structure is
sometimes called a "master/feeder" structure.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


NOTES TO FINANCIAL STATEMENTS


Merrill Lynch Senior Floating Rate Fund II, Inc.


1. Significant Accounting Policies:
Merrill Lynch Senior Floating Rate Fund II, Inc. (the "Fund") is
registered under the Investment Company Act of 1940 as a
continuously offered, non-diversified, closed-end management
investment company. On October 6, 2000, the Fund converted from a
stand-alone investment company to a "feeder" fund that seeks to
achieve its investment objective by investing all of its assets in
the Master Senior Floating Rate Trust (the "Trust"), a mutual fund
that has the same investment objective as the Fund. All investments
will be made at the Trust level. This structure is sometimes called
a "master/feeder" structure. The value of the Fund's investment in
the Trust reflects the Fund's proportionate interest in the net
assets of the Trust. The performance of the Fund is directly
affected by the performance of the Trust. The financial statements
of the Trust, including the Schedule of Investments, are included
elsewhere in this report and should be read in conjunction with the
Fund's financial statements. The Fund's financial statements are
prepared in conformity with accounting principles generally accepted
in the United States of America, which may require the use of
management accruals and estimates. These unaudited financial
statements reflect all adjustments, which are, in the opinion of
management, necessary to a fair statement of the results for the
interim period presented. All such adjustments are of a normal,
recurring nature. The percentage of the Trust owned by the Fund at
February 28, 2001 was 99.9%. The following is a summary of
significant accounting policies followed by the Fund.

(a) Valuation of investments--The Fund records its investment in the
Trust at fair value. Valuation of securities held by the Trust is
discussed in Note 1a of the Trust's Notes to Financial Statements,
which are included elsewhere in this report.

(b) Investment income and expenses--The Fund records daily its
proportionate share of the Trust's income, expenses and realized and
unrealized gains and losses. In addition, the Fund accrues its own
expenses.

(c) Income taxes--It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated
investment companies and to distribute substantially all of its
taxable income to shareholders. Therefore, no Federal income tax
provision is required.

(d) Prepaid registration fees--Prepaid registration fees are charged
to expense as the related shares are issued.

(e) Dividends and distributions--Dividends from net investment
income are declared daily and paid monthly. Distributions of capital
gains are recorded on the ex-dividend dates.

(f) Investment transactions--Investment transactions in the Trust
are accounted for on a trade date basis.


2. Transactions with Affiliates:
The Fund has entered into an Administrative Services Agreement with
Fund Asset Management, L.P. ("FAM"). The general partner of FAM is
Princeton Services, Inc. ("PSI"), a wholly-owned subsidiary of
Merrill Lynch & Co., Inc. ("ML & Co."), which is the limited
partner. The Fund has an Administrative Services Agreement with FAM
whereby FAM will receive a fee equal to an annual rate of .40% of
the Fund's average daily net assets on a monthly basis, in return
for the performance of administrative services (other than
investment advice and related portfolio activities) necessary for
the operation of the Fund.

Financial Data Services, Inc. ("FDS"), an indirect, wholly-owned
subsidiary of ML & Co., is the Fund's transfer agent.

Accounting services were provided to the Fund by FAM or its
affiliates through December 31, 2000. Up to this date, the Fund
reimbursed FAM or its affiliates $17,168 for these services. As of
January 1, 2001, accounting services are provided for the Fund by
State Street Bank and Trust Company ("State Street") pursuant to an
agreement between State Street and the Fund. The Fund will pay the
cost of these services. In addition, the Fund will reimburse FAM for
the cost of certain additional accounting services.

For the six months ended February 28, 2001, FAM Distributors, Inc.
("FAMD"), a wholly-owned subsidiary of Merrill Lynch Group, Inc.,
earned early withdrawal charges of $137,948 relating to the tender
of the Fund's shares.



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


NOTES TO FINANCIAL STATEMENTS (CONCLUDED)


Certain officers and/or directors of the Fund are officers and/or
directors of FAM, PSI, FDS, and/or ML & Co.


3. Investments:
Increases and decreases in the Fund's investment in the Trust for
the period October 6, 2000 to February 28, 2001 were $505,881,416
and $88,170,287, respectively.


4. Capital Share Transactions:
Transactions in capital shares were as follows:


For the Six Months Ended                            Dollar
February 28, 2001                     Shares        Amount

Shares sold                         5,880,922   $ 57,297,100
Shares issued to share-
holders in reinvestment
of dividends                          953,316      9,289,449
                                 ------------   ------------
Total issued                        6,834,238     66,586,549
Shares redeemed                   (7,899,392)   (76,804,547)
                                 ------------   ------------
Net decrease                      (1,065,154) $ (10,217,998)
                                 ============   ============

For the Year Ended                                  Dollar
August 31, 2000                       Shares        Amount

Shares sold                        27,234,679   $271,213,209
Shares issued to share-
holders in reinvestment
of dividends                        1,438,383     14,304,352
                                 ------------   ------------
Total issued                       28,673,062    285,517,561
Shares redeemed                   (6,818,025)   (67,641,618)
                                 ------------   ------------
Net increase                       21,855,037   $217,875,943
                                 ============   ============


5. Capital Loss Carryforward:
At August 31, 2000, the Fund had a net capital loss carryforward of
approximately $63,000, of which $5,000 expires in 2007 and $58,000
expires in 2008. This amount will be available to offset like
amounts of any future taxable gains.


6. Subsequent Events:
The Fund began a quarterly tender offer on April 17, 2001 that
concludes on May 15, 2001.

Merrill Lynch Senior Floating Rate Fund II, Inc.


PORTFOLIO PROFILE


As of February 28, 2001

                                   Percent of
Ten Largest Holdings              Total Assets

VoiceStream PCS Holdings Corp.         3.5%
Nextel Communications, Inc.            3.4
Wyndam International, Inc.             2.5
Entravision                            2.4
Global Crossing Holdings Ltd.          2.4
Century Cable LLC                      2.4
Charter Communications Holdings        2.4
Isle of Capri Casinos, Inc.            2.4
Huntsman ICI Chemical LLC              2.3
Stone Container Corp.                  2.0


                                        Percent of
Five Largest Industries                Total Assets

Wireless Telecommunications                13.2%
Broadcasting--Radio & Television           11.5
Cable Television Services                  10.0
Electronics / Electrical Components         5.8
Chemicals                                   4.6

                                        Percent of
Quality Rating                          Long-Term
S&P/Moody's                            Investments

BBB/Baa                                     2.6%
BB/Ba                                      56.1
B/B                                        29.5
CCC/Caa                                     1.9
NR (Not Rated)                              9.9



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


SCHEDULE OF INVESTMENTS                                                           MASTER SENIOR FLOATING RATE TRUST

                   S&P    Moody's      Face                     Senior Secured
Industries        Rating   Rating     Amount            Floating Rate Loan Interests*                         Value
                                                                                         
Air                 NR++    NR++  $ 1,498,125   Gemini Air Cargo, Term A, due 8/12/2005                 $    1,499,998
Transportation--
0.4%

Aircraft &          BB-     Ba3       648,627   Fairchild Semiconductors Corp., Term, due 4/30/2006            605,656
Parts--0.1%

Amusement &         NR++    NR++    5,000,000   Metro-Goldwyn-Mayer Co., Term B, due 3/31/2006               4,967,970
Recreational
Services--1.2%

Apparel--0.5%       BB      B1      4,600,000   Warnaco Inc., Term, due 8/12/2002                            2,150,500

Automotive          B+      NR++    4,994,048   Citation Corporation, Term B, due 12/01/2007                 4,145,060
Equipment--2.4%     BB-     Ba3     2,340,000   Collins & Aikman Corp., Term B, due 6/30/2005                2,234,700
                                                Tenneco Automotive Inc.:
                    BB-     B2      2,254,762      Term B, due 11/02/2007                                    1,880,221
                    BB-     B2      2,254,762      Term C, due 5/02/2008                                     1,880,221
                                                                                                        --------------
                                                                                                            10,140,202

Broadcasting--      NR++    NR++    3,000,000   Bahakel Communications Ltd., Term B, due 6/30/2008           2,992,500
Radio &             B1      B       5,500,000   Benedek Broadcasting Corporation, Term B, due 11/20/2007     5,417,500
Television--        B+      Ba3     7,000,000   Citadel Communications, Term B, due 3/31/2007                7,013,125
11.5%               NR++    NR++    5,940,000   Corus Entertainment Inc., Tranche II, due 8/31/2007          5,954,850
                                                Cumulus Media Inc.:
                    B1      B       1,800,000      Term B, due 9/30/2007                                     1,787,251
                    B1      B       1,200,000      Term C, due 2/28/2008                                     1,191,500
                    B+      Ba3    10,000,000   Entravision, Term B, due 12/31/2008                         10,090,000
                    B+      Ba3     7,000,000   Gray Communications Systems, Term B, due 12/31/2005          7,032,816
                    NR++    NR++      990,000   VHR Broadcasting, Term B, due 9/30/2007                        991,856
                    BB      Ba2     6,000,000   Young Broadcasting Inc., Term B, due 12/31/2006              6,051,378
                                                                                                        --------------
                                                                                                            48,522,776

Building            B+      Ba3     2,952,632   Better Minerals, Term B, due 9/30/2007                       2,870,513
Materials--1.4%     B+      B1      2,926,000   Panolam Industries, Term B, due 12/31/2005                   2,929,657
                                                                                                        --------------
                                                                                                             5,800,170

Cable Television    BB      Ba3     5,000,000   CC VI Operating Company LLC, Term B, due 11/12/2008          5,003,125
Services--10.1%     BB      Ba3     4,000,000   CC VIII Operating Company LLC, Term B, due 2/02/2008         4,004,000
                    BB      Ba3    10,000,000   Century Cable LLC, Term, due 6/30/2009                       9,999,040
                    BB+     Ba3    10,000,000   Charter Communications Holdings, Term B, due 3/18/2008       9,996,550
                    CCC+    NR++    5,210,526   Classic Cable Inc., Term B, due 1/31/2008                    4,969,539
                    BB+     Ba3     3,500,000   Insight Midwest, Term B, due 1/05/2010                       3,518,375
                    B+      B1      5,000,000   Pegasus Media & Communications, Term, due 4/30/2005          5,002,085
                                                                                                        --------------
                                                                                                            42,492,714

Chemicals--4.6%     BB      Ba3     5,000,000   Huntsman Corp., Term C, due 12/31/2005                       4,679,165
                                                Huntsman ICI Chemicals LLC:
                    BB      Ba3     4,900,000      Term B, due 6/30/2007                                     4,928,175
                    BB      Ba3     4,900,000      Term C, due 6/30/2008                                     4,928,175
                    NR++    Ba3     4,912,493   Lyondell Petrochemical Co., Term E, due 5/17/2006            5,069,079
                                                                                                        --------------
                                                                                                            19,604,594

Computer-Related                                Bridge Information Systems:
Products--0.2%      NR++    NR++    1,846,334      Term, due 5/29/2003                                         253,871
                    NR++    NR++    3,652,470      Term B, due 5/29/2005                                       496,736
                                                                                                        --------------
                                                                                                               750,607




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


SCHEDULE OF INVESTMENTS (CONTINUED)                                               MASTER SENIOR FLOATING RATE TRUST

                   S&P    Moody's      Face                     Senior Secured
Industries        Rating   Rating     Amount            Floating Rate Loan Interests*                         Value
                                                                                         
Consumer                                        Simmons Co.:
Products--1.3%      B+      Ba3   $ 2,427,325      Term B, due 10/29/2005                               $    2,433,696
                    B+      Ba3     3,222,290      Term C, due 10/29/2006                                    3,230,749
                                                                                                        --------------
                                                                                                             5,664,445

Drilling--0.3%      B+      Ba3     1,267,222   Key Energy Group Inc., Term B, due 9/14/2004                 1,269,003

Electronics/        B+      NR++    4,941,176   Acterna Corporation, Term B, due 9/30/2007                   4,918,941
Electrical          BB      Ba2     4,962,500   Amkor Technology Inc., Term B, due 9/30/2005                 4,986,280
Components--        B       B2      5,000,000   Cook Inlet, Term A, due 12/31/2007                           4,987,500
5.8%                B+      B1      1,185,246   DD Inc., Term B, due 4/22/2005                               1,180,060
                                                Semiconductor Components:
                    BB-     Ba3     1,444,444      Term B, due 8/04/2006                                     1,442,639
                    BB-     Ba3     1,555,556      Term C, due 8/04/2007                                     1,553,611
                    BB-     Ba3     2,000,000      Term D, due 8/04/2007                                     1,998,334
                    B+      B2      3,824,520   Superior Telecom, Term A, due 5/27/2004                      3,458,800
                                                                                                        --------------
                                                                                                            24,526,165

Environmental                                   IT Group Inc.:
Services--0.7%      BB      B1      1,485,000      Term, due 6/08/2007                                       1,470,150
                    BB      B1      1,469,491      Term B, due 6/11/2006                                     1,447,449
                                                                                                        --------------
                                                                                                             2,917,599

Financial           NR++    Ba3     3,500,000   Sovereign Bancorp Inc., Term, due 11/17/2003                 3,512,033
Services--0.8%

Food & Kindred      BB-     Ba3     1,930,122   Merisant Company, Term B, due 3/30/2007                      1,928,515
Products--0.5%

Gaming--4.0%                                    Ameristar:
                    B+      Ba3     3,417,160      Term B, due 12/31/2006                                    3,423,567
                    B+      Ba3     2,928,994      Term C, due 12/31/2007                                    2,934,486
                    B+      B1        500,000   Autotote Corporation, Term B, due 9/30/2007                    481,250
                                                Isle of Capri Casinos, Inc.:
                    BB-     Ba2     5,293,333      Term B, due 3/01/2006                                     5,314,422
                    BB-     Ba2     4,631,667      Term C, due 3/01/2007                                     4,650,119
                                                                                                        --------------
                                                                                                            16,803,844

Health Services--                               Dade Behring Inc.:
0.4%                B       Caa1    1,231,250      Term B, due 6/30/2006                                       824,058
                    B       Caa1    1,231,250      Term C, due 6/30/2007                                       824,058
                                                                                                        --------------
                                                                                                             1,648,116

Hotels & Motels--   B       NR++    1,397,681   Lodgian Financing Corp., Term B, due 7/15/2006               1,399,428
4.2%                NR++    NR++    5,888,987   Strategic Hotels Inc., Term, due 11/16/2004                  5,925,793
                                                Wyndam International, Inc.:
                    NR++    NR++    6,644,616      Term, due 6/30/2004                                       6,626,157
                    NR++    NR++    4,000,000      Term, due 6/30/2006                                       3,970,248
                                                                                                        --------------
                                                                                                            17,921,626

Industrial          BB-     Ba3     6,818,182   Key3Media, Term B, due 6/30/2006                             6,839,489
Services--2.3%      B+      B1      2,970,000   Muzak Audio, Term B, due 12/31/2006                          2,921,738
                                                                                                        --------------
                                                                                                             9,761,227

Leasing & Rental    BB-     B2      1,969,990   Anthony Crane Rental L.P., Term, due 7/20/2006               1,605,542
Services--1.5%      BB-     B2      2,970,000   Nations Rent Inc., Term B, due 7/20/2006                     2,093,850
                    B       NR++    2,962,552   Rent Way Inc., Term B, due 9/30/2006                         2,740,361
                                                                                                        --------------
                                                                                                             6,439,753




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


SCHEDULE OF INVESTMENTS (CONTINUED)                                               MASTER SENIOR FLOATING RATE TRUST

                   S&P    Moody's      Face                     Senior Secured
Industries        Rating   Rating     Amount            Floating Rate Loan Interests*                         Value
                                                                                         
Manufacturing--     B       B1    $ 2,962,500   Blount International Inc., Term B, due 6/30/2006        $    2,906,953
2.8%                                            Mueller Industries, Inc.:
                    B+      B1      2,462,500      Term B, due 8/16/2006                                     2,472,505
                    B+      B1      2,462,500      Term C, due 8/16/2007                                     2,472,889
                    BB-     Ba3     4,095,248   Terex Corp., Term C, due 3/06/2006                           4,096,956
                                                                                                        --------------
                                                                                                            11,949,303

Medical             B       B1      1,980,000   Hanger Orthopedic Group, Inc., Term B, due 12/30/2006        1,442,099
Equipment--0.3%

Metals & Mining--   CCC-    Caa2      950,000   AEI Resources Inc., Term B, due 12/31/2004                     522,500
0.6%                D       Caa3    2,585,000   LTV Corporation, Term, due 11/10/2004                        2,029,225
                                                                                                        --------------
                                                                                                             2,551,725

Paper--2.8%         B       B1      3,208,029   Riverwood International Inc., Term B, due 2/28/2004          3,221,881
                                                Stone Container Corp.:
                    B+      Ba3     2,395,022      Term E, due 10/01/2003                                    2,406,186
                    B+      Ba3     2,473,913      Term F, due 3/31/2006                                     2,484,736
                    B+      Ba3     1,967,778      Term G, due 3/31/2006                                     1,971,877
                    B+      Ba3     1,598,500      Term H, due 3/31/2006                                     1,601,830
                                                                                                        --------------
                                                                                                            11,686,510

Printing &          B+      B1      4,975,000   Liberty Group Operating, Term B, due 3/31/2007               4,978,109
Publishing--3.0%    NR++    NR++      923,854   Reiman Publications, Term B, due 12/01/2005                    929,436
                                                Trader.com:
                    NR++    NR++    1,045,399      Term B, due 12/31/2006                                    1,037,558
                    NR++    NR++      704,601      Term C, due 12/31/2007                                      699,317
                    BB-     B1      2,975,726   Vertis, Inc., Term B, due 12/06/2008                         2,890,174
                    NR++    NR++    2,030,623   Ziff-Davis Inc., Term B, due 3/31/2007                       2,019,518
                                                                                                        --------------
                                                                                                            12,554,112

Property                                        Corrections Corporation of America:
Management--        B       B3        717,397      Term B, due 12/31/2002                                      616,962
2.2%                B       B3      4,719,370      Term C, due 12/31/2002                                    4,042,928
                    NR++    Ba3     4,975,000   NRT Inc., Term, due 7/31/2004                                4,800,875
                                                                                                        --------------
                                                                                                             9,460,765

Restaurants &                                   Domino's & Bluefence:
Food Service--      B+      B1        952,879      Term B, due 12/21/2006                                      957,908
0.5%                B+      B1        954,875      Term C, due 12/21/2007                                      959,915
                                                                                                        --------------
                                                                                                             1,917,823

Retail & Retail     B+      B1      2,425,000   Duane Reade Co., Term B, due 2/15/2005                       2,431,063
Specialty--0.6%

Tower Construction  BB      Ba3     5,000,000   American Towers, Inc., Term B, due 12/31/2007                5,031,920
& Leasing--3.9%     BB-     Ba3     3,896,000   Crown Castle International Corporation,
                                                Term B, due 3/31/2008                                        3,919,267
                    B+      B1      7,500,000   Spectracite Communications, Term B, due 12/31/2007           7,548,045
                                                                                                        --------------
                                                                                                            16,499,232

Transportation      BB+     Ba1     5,000,000   Kansas City Southern Railroad, Term B, due 12/29/2006        5,038,540
Services--1.6%      B+      B1      1,980,000   North American Van Lines Inc., Term B, due 11/18/2007        1,843,875
                                                                                                        --------------
                                                                                                             6,882,415




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


SCHEDULE OF INVESTMENTS (CONCLUDED)                                               MASTER SENIOR FLOATING RATE TRUST

                   S&P    Moody's      Face                     Senior Secured
Industries        Rating   Rating     Amount            Floating Rate Loan Interests*                         Value
                                                                                         
Utilities--2.6%     BB      Ba1   $ 2,500,000   AES Texas Funding II, Term, due 3/31/2002               $    2,496,875
                    BB+     Ba2     4,962,500   TNP Enterprises, Inc., Term, due 6/30/2006                   4,984,211
                    BB+     Ba1     3,482,500   Western Resources Inc., Term B, due 3/17/2003                3,514,424
                                                                                                        --------------
                                                                                                            10,995,510

Waste                                           Allied Waste North America Inc.:
Management--        BB      Ba3     1,969,955      Term B, due 6/30/2006                                     1,950,562
1.0%                BB      Ba3     2,363,944      Term C, due 6/30/2007                                     2,340,673
                                                                                                        --------------
                                                                                                             4,291,235

Wired               BBB-    Ba1    10,000,000   Global Crossing Holdings Ltd., Term B, due 6/30/2006        10,044,440
Telecommuni-
cations--2.4%

Wireless                                        American Cellular Corp.:
Telecommuni-        BB-     Ba3     3,500,000      Term B, due 3/31/2008                                     3,494,166
cations--13.2%      BB-     Ba3     4,000,000      Term C, due 3/31/2009                                     3,993,332
                    B+      B1      4,398,750   Centennial Cellular Operating Co., Term B,
                                                due 11/30/2007                                               4,405,854
                                                Dobson/Sygnet Operating Co.:
                    NR++    B3      1,624,581      Term B, due 3/23/2007                                     1,613,074
                    NR++    B3      1,686,120      Term C, due 12/23/2007                                    1,674,528
                                                Nextel Communications, Inc.:
                    BB+     Ba2     2,500,000      Term B, due 6/30/2008                                     2,507,310
                    BB+     Ba2     2,500,000      Term C, due 12/31/2008                                    2,507,310
                    BB+     Ba2     9,438,000      Term D, due 3/31/2009                                     9,379,551
                    B       B2      5,000,000   PowerTel PCS, Inc., Term B, due 2/06/2003                    4,975,000
                                                Rural Cellular Corp.:
                    B+      B1      2,750,000      Term B, due 10/03/2008                                    2,744,844
                    B+      B1      2,750,000      Term C, due 4/03/2009                                     2,744,844
                    NR++    B2      1,000,000   Tritel PCS Inc., Term B, due 12/31/2007                      1,002,188
                                                VoiceStream PCS Holdings Corp.:
                    B+      B1      5,000,000      Term B, due 2/25/2009                                     4,974,310
                    B+      B1     10,000,000      Vendor A Facility, due 6/30/2009                          9,889,900
                                                                                                        --------------
                                                                                                            55,906,211

                                                Total Senior Secured Floating Rate Loan Interests
                                                (Cost--$399,914,618)--91.7%                                387,539,956

                                                   Short-Term Securities

Commercial                         21,017,000   General Motors Acceptance Corp., 5.56% due 3/01/2001        21,017,000
Paper**--5.0%

US Government                      10,000,000   Freddie Mac, 5.35% due 3/06/2001                             9,992,569
Agency
Obligations**--2.3%
                                                Total Short-Term Securities
                                                (Cost--$31,009,569)--7.3%                                   31,009,569

Total Investments (Cost--$430,924,187)--99.0%      418,549,525

Other Assets Less Liabilities--1.0%                                                                          4,184,624
                                                                                                        --------------
Net Assets--100.0%                                                                                      $  422,734,149
                                                                                                        ==============


*The interest rates on senior secured floating rate loan interests
are subject to change periodically based on the change in the prime
rate of a US Bank, LIBOR (London Interbank Offered Rate), or, in
some cases, another base lending rate.
**Commercial Paper and certain US Government Agency Obligations are
traded on a discount basis; the interest rates shown reflect the
discount rates paid at the time of purchase by the Trust.
++Not Rated.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION


Statement of Assets and Liabilities                                                 Master Senior Floating Rate Trust

                    As of February 28, 2001
                                                                                                
Assets:             Investments, at value (identified cost--$430,924,187)                                $   418,549,525
                    Receiveables:
                      Interest                                                       $     3,201,690
                      Contributions                                                        1,331,125           4,532,815
                                                                                     ---------------
                    Other assets                                                                                  80,727
                                                                                                         ---------------
                    Total assets                                                                             423,163,067
                                                                                                         ---------------

Liabilities:        Payables:
                      Investment adviser                                                     270,814
                      Custodian bank                                                          75,936             346,750
                                                                                     ---------------
                    Accrued expenses and other liabilities                                                        82,168
                                                                                                         ---------------
                    Total liabilities                                                                            428,918
                                                                                                         ---------------

Net Assets:         Net assets                                                                           $   422,734,149
                                                                                                         ===============

Net Assets          Partners' capital                                                                    $   435,107,311
Consist of:         Unrealized depreciation on investments--net                                             (12,373,162)
                                                                                                         ---------------
                    Net assets                                                                           $   422,734,149
                                                                                                         ===============
                    See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


Financial Information (CONTINUED)


Statement of Operations                                                             Master Senior Floating Rate Trust

                    For the Period October 6, 2000++ to February 28, 2001
                                                                                                
Investment          Interest and discount earned                                                         $    17,647,757
Income:             Facility and other fees                                                                      210,307
                                                                                                         ---------------
                    Total income                                                                              17,858,064
                                                                                                         ---------------

Expenses:           Investment advisory fees                                         $     1,679,727
                    Accounting services                                                       70,887
                    Professional fees                                                         33,506
                    Reorganization costs                                                      28,000
                    Custodian fees                                                            18,071
                    Borrowing fees                                                            14,333
                    Assignment fees                                                           10,317
                    Trustees' fees and expenses                                                3,340
                    Other                                                                      6,893
                                                                                     ---------------
                    Total expenses                                                                             1,865,074
                                                                                                         ---------------
                    Investment income--net                                                                    15,992,990
                                                                                                         ---------------

Realized &          Realized gain on investments--net                                                            210,386
Unrealized          Unrealized depreciation on investments--net                                              (7,860,653)
Gain (Loss) on                                                                                           ---------------
Investments--Net:   Net Increase in Net Assets Resulting from Operations                                 $     8,342,723
                                                                                                         ===============


Statements of Changes in Net Assets                                                   Master Senior Floating Rate Trust

                                                                                                          For the Period
                                                                                                       October 6, 2000++
Increase (Decrease) in Net Assets:                                                                  to February 28, 2001
                                                                                                   
Operations:         Investment income--net                                                               $    15,992,990
                    Realized gain on investments--net                                                            210,386
                    Unrealized depreciation on investments--net                                              (7,860,653)
                                                                                                         ---------------
                    Net increase in net assets resulting from operations                                       8,342,723
                                                                                                         ---------------

Net Capital         Increase in net assets derived from net capital contributions                            414,291,326
                                                                                                         ---------------
Contributions:
Net Assets:         Total increase in net assets                                                             422,634,049
                    Beginning of period                                                                          100,100
                                                                                                         ---------------
                    End of period                                                                        $   422,734,149
                                                                                                         ===============

++Commencement of operations.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


FINANCIAL INFORMATION (CONCLUDED)


Statement of Cash Flows                                                                Master Senior Floating Rate Trust

                                                                                                          For the Period
                                                                                                       October 6, 2000++
Increase (Decrease) in Net Assets:                                                                  to February 28, 2001
                                                                                                    
Cash Provided by    Net increase in net assets resulting from operations                                  $    8,342,723
Operating           Adjustments to reconcile net increase in net assets resulting from operations
Activities:         to net cash provided by operating activities:
                      Decrease in receivables                                                                    882,539
                      Increase in other assets                                                                  (80,727)
                      Decrease in other liabilities                                                            (221,881)
                      Realized and unrealized loss on investments--net                                         7,650,267
                      Amortization of discount                                                               (1,060,009)
                                                                                                         ---------------
                    Net cash provided by operating activities                                                 15,512,912
                                                                                                         ---------------

Cash Provided by    Proceeds from principal payments and sales of loan interests                              79,034,992
Investing           Purchases of loan interests                                                             (50,215,679)
Activities:         Purchases of short-term investments                                                  (1,883,492,352)
                    Proceeds from sales and maturities of short-term investments                           1,877,997,888
                                                                                                         ---------------
                    Net cash provided by investing activities                                                 23,324,849
                                                                                                         ---------------

Cash Used for       Cash receipts on capital contributions                                                    46,906,450
Financing           Cash payments on capital withdrawals                                                    (85,744,211)
Activities:                                                                                              ---------------
                    Net cash used for financing activities                                                  (38,837,761)
                                                                                                         ---------------

Cash:               Net increase in cash                                                                              --
                    Cash at beginning of period                                                                       --
                                                                                                         ---------------
                    Cash at end of period                                                                             --
                                                                                                         ===============


++Commencement of operations.

See Notes to Financial Statements.


Financial Highlights                                                                  Master Senior Floating Rate Trust


                                                                                                          For the Period
The following ratios have been derived from                                                            October 6, 2000++
information provided in the financial statements.                                                   to February 28, 2001
                                                                                                   
Ratios to Average   Expenses                                                                                      1.05%*
Net Assets:                                                                                              ===============
                    Investment income--net                                                                        9.05%*
                                                                                                         ===============

Supplemental        Net assets, end of period (in millions)                                              $           423
Data:                                                                                                    ===============
                    Portfolio turnover                                                                            12.39%
                                                                                                         ===============


*Annualized.
++Commencement of operations.

See Notes to Financial Statements.




Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


NOTES TO FINANCIAL STATEMENTS


Master Senior Floating Rate Trust


1. Significant Accounting Policies:
Master Senior Floating Rate Trust (the "Trust") is registered under
the Investment Company Act of 1940 and is organized as a Delaware
business trust. The Declaration of Trust permits the Trustees to
issue nontransferable interests in the Trust, subject to certain
limitations. The Trust's financial statements are prepared in
conformity with accounting principles generally accepted in the
United States of America, which may require the use of management
accruals and estimates. These unaudited financial statements reflect
all adjustments, which are, in the opinion of management, necessary
to a fair statement of the results for the interim period presented.
All such adjustments are of a normal, recurring nature. The
following is a summary of significant accounting policies followed
by the Trust.

(a) Loan participation interests--The Trust invests in senior
secured floating rate loan interests ("Loan Interests") with
collateral having a market value, at time of acquisition by the
Trust, which Trust management believes equals or exceeds the
principal amount of the corporate loan. The Trust may invest up to
20% of its total assets in loans made on an unsecured basis.
Depending on how the loan was acquired, the Trust will regard the
issuer as including the corporate borrower along with an agent bank
for the syndicate of lenders and any intermediary of the Trust's
investment. Because agents and intermediaries are primarily
commercial banks, the Trust's investment in corporate loans at
February 28, 2001 could be considered to be concentrated in
commercial banking.

(b) Valuation of investments--Loan Interests are valued in
accordance with guidelines established by the Board of Directors.
Loan Interests are valued at the mean between the last available bid
and asked prices from one or more brokers or dealers as obtained
from Loan Pricing Corporation. For the limited number of Loan
Interests for which no reliable price quotes are available, such
Loan Interests will be valued by Loan Pricing Corporation through
the use of pricing matrices to determine valuations. For Loan
Interests for which an active secondary market does not exist to a
reliable degree in the opinion of the Investment Adviser, such Loan
Interests will be valued by the Investment Adviser at fair value,
which is intended to approximate market value.

Other portfolio securities may be valued on the basis of prices
furnished by one or more pricing services which determine prices for
normal, institutional-size trading units of such securities using
market information, transactions for comparable securities and
various relationships between securities which are generally
recognized by institutional traders. In certain circumstances,
portfolio securities are valued at the last sale price on the
exchange that is the primary market for such securities, or the last
quoted bid price for those securities for which the over-the-counter
market is the primary market or for listed securities in which there
were no sales during the day. Short-term securities with remaining
maturities of sixty days or less are valued at amortized cost, which
approximates market value. Securities and assets for which market
quotations are not readily available are valued at fair value as
determined in good faith by or under the direction of the Board of
Trustees of the Trust.

(c) Derivative financial instruments--The Trust may engage in
various portfolio investment strategies to increase or decrease the
level of risk to which the Trust is exposed more quickly and
efficiently than transactions in other types of instruments. Losses
may arise due to changes in the value of the contract or if the
counterparty does not perform under the contract.

* Interest rate transactions--The Trust is authorized to enter into
interest rate swaps and purchase or sell interest rate caps and
floors. In an interest rate swap, the Trust exchanges with another
party their respective commitments to pay or receive interest on a
specified notional principal amount. The purchase of an interest
rate cap (or floor) entitles the purchaser, to the extent that a
specified index exceeds (or falls below) a predetermined interest
rate, to receive payments of interest equal to the difference
between the index and the predetermined rate on a notional principal
amount from the party selling such interest rate cap (or floor).



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


NOTES TO FINANCIAL STATEMENTS (CONTINUED)


Master Senior Floating Rate Trust

(d) Income taxes--The Trust is classified as a partnership for
Federal income tax purposes. As a partnership for Federal income tax
purposes, the Trust will not incur Federal income tax liability.
Items of partnership income, gain, loss and deduction will pass
through to investors as partners in the Trust. Therefore, no Federal
income tax provision is required. It is intended that the Trust's
assets will be managed so an investor in the Trust can satisfy the
requirements of subchapter M of the Internal Revenue Code.

(e) Security transactions and investment income--Security
transactions are recorded on the dates the transactions are entered
into (the trade dates). Realized gains and losses on security
transactions are determined on the identified cost basis. Dividend
income is recorded on the ex-dividend dates. Interest income  is
recognized on the accrual basis. The Fund will adopt the provisions
to amortize all premiums and discounts on debt securities effective
September 1, 2001, as now required under the new AICPA Audit and
Accounting Guide for Investment Companies. The cumulative effect of
this accounting change will have no impact on the total net assets
of the Trust. The impact of this accounting change has not been
determined, but will result in an adjustment to the cost of
securities and a corresponding adjustment to net unrealized
appreciation/depreciation, based on securities held as of August 31,
2001.

(f) Custodian bank--The Trust recorded an amount payable to the
Custodian Bank as a result of the stated overdrawn balance. This
overdrawn balance was due to an overprojected corporate event.

2. Investment Advisory Agreement and
Transactions with Affiliates:
The Trust has entered into an Investment Advisory Agreement with
Fund Asset Management, L.P. ("FAM"). The general partner of FAM is
Princeton Services, Inc. ("PSI"), an indirect, wholly-owned
subsidiary of Merrill Lynch & Co., Inc. ("ML & Co."), which is the
limited partner.

FAM is responsible for the management of the Trust's portfolio and
provides the necessary personnel, facilities, equipment and certain
other services necessary to the operations of the Trust. For such
services, the Trust pays a monthly fee at an annual rate of .95% of
the average daily value of the Trust's net assets.

Financial Data Services, Inc. ("FDS"), a wholly-owned subsidiary of
ML & Co., is the Trust's transfer agent.

Accounting services were provided to the Trust by FAM and its
affiliates through December 31, 2000. Up to this date, the Trust
reimbursed FAM $39,648 for these services. As of January 1, 2001,
accounting services are provided for the Trust by State Street Bank
and Trust Company ("State Street") pursuant to an agreement between
State Street and the Trust. The Trust will pay the cost of these
services. In addition, the Trust will reimburse FAM for the cost of
certain additional accounting services.

Certain officers and/or trustees of the Trust are officers and/or
directors of FAM, PSI, FDS, FAMD, and/or ML & Co.

3. Investments:
Purchases and sales of investments, excluding short-term securities,
for the period October 6, 2000 to February 28, 2001 were $50,215,679
and $78,714,479, respectively.

Net realized gains (losses) for the period October 6, 2000 to
February 28, 2001 and net unrealized gains (losses) as of February
28, 2001 were as follows:

                                     Realized     Unrealized
                                      Gains         Gains
                                     (Losses)      (Losses)

Loan interests                    $   210,514  $(12,374,662)
Short-term investments                  (128)             --
Unfunded loan interests                    --          1,500
                                  -----------   ------------
Total                             $   210,386  $(12,373,162)
                                  ===========   ============

As of February 28, 2001, net unrealized depreciation for Federal
income tax purposes aggregated $12,374,662, of which $1,786,885
related to appreciated securities and $14,161,547 related to
depreciated securities. At February 28, 2001, the aggregate cost of
investments for Federal income tax purposes was $430,924,187.



Merrill Lynch Senior Floating Rate Fund II, Inc.
February 28, 2001


NOTES TO FINANCIAL STATEMENTS (CONCLUDED)


Master Senior Floating Rate Trust


4. Short-Term Borrowings:
On December 1, 2000, the Trust, along with certain other funds
managed by FAM and its affiliates, renewed and amended a
$1,000,000,000 credit agreement with Bank One, N.A. and certain
other lenders. The Trust may borrow under the credit agreement to
fund shareholder redemptions and for other lawful purposes other
than for leverage. The Trust may borrow up to the maximum amount
allowable under the Trust's current prospectus and statement of
additional information, subject to various other legal, regulatory
or contractual limits. The Trust pays a commitment fee of .09% per
annum based on the Trust's pro rata share of the unused portion of
the facility. Amounts borrowed under the facility bear interest at a
rate equal to, at each fund's election, the Federal Funds rate plus
 .50% or a base rate as determined by Bank One, N.A. The Trust did
not borrow under the facility during the period October 6, 2000 to
February 28, 2001.



OFFICERS AND DIRECTORS/TRUSTEES

Terry K. Glenn, President and Director/Trustee
Ronald W. Forbes, Director/Trustee
Cynthia A. Montgomery, Director/Trustee
Charles C. Reilly, Director/Trustee
Kevin A. Ryan, Director/Trustee
Roscoe S. Suddarth, Director/Trustee
Richard R. West, Director/Trustee
Edward D. Zinbarg, Director/Trustee
Kevin J. Booth, Vice President
Joseph Matteo, Vice President
Donald C. Burke, Vice President and Treasurer
Bradley J. Lucido, Secretary


Arthur Zeikel, Director/Trustee and Joseph T. Monagle Jr., Senior
Vice President of Merrill Lynch Senior Floating Rate Fund II, Inc.,
have recently retired. The Fund's Board of Directors wishes Messrs.
Zeikel and Monagle well in their retirements.

Custodian
The Bank of New York
90 Washington Street
New York, NY 10286

Transfer Agent
Financial Data Services, Inc.
4800 Deer Lake Drive East
Jacksonville, FL 32246-6484
(800) 637-3863