MUNIYIELD PENNSYLVANIA FUND
N-30D, 1999-06-22
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MUNIYIELD
PENNSYLVANIA
FUND



FUND LOGO



Semi-Annual Report

April 30, 1999



This report, including the financial information herein, is
transmitted to the shareholders of MuniYield Pennsylvania Fund for
their information. It is not a prospectus, circular or
representation intended for use in the purchase of shares of the
Fund or any securities mentioned in the report. Past performance
results shown in this report should not be considered a
representation of future performance. The Fund has leveraged its
Common Shares by issuing Preferred Shares to provide the Common
Shareholders with a potentially higher rate of return. Leverage
creates risks for Common Shareholders, including the likelihood of
greater volatility of net asset value and market price of the Common
Shares, and the risk that fluctuations in the short-term dividend
rates of the Preferred Shares may affect the yield to Common
Shareholders. Statements and other information herein are as dated
and are subject to change.





MuniYield
Pennsylvania Fund
Box 9011
Princeton, NJ
08543-9011


Printed on post-consumer recycled paper


MuniYield Pennsylvania Fund


TO OUR SHAREHOLDERS

For the six months ended April 30, 1999, the Common Shares of
MuniYield Pennsylvania Fund earned $0.442 per share income
dividends, which included earned and unpaid dividends of $0.067.
This represents a net annualized yield of 5.84%, based on a month-
end per share net asset value of $15.26. Over the same period, the
total investment return on the Fund's Common Shares was +0.89%,
based on a change in per share net asset value from $16.01 to
$15.26, and assuming reinvestment of $0.519 per share ordinary
income dividends and $0.393 per share capital gains distributions.

For the six-month period ended April 30, 1999, the Fund's Auction
Market Preferred Shares had an average yield of 3.84%.


The Municipal Market Environment
During the six months ended April 30, 1999, long-term bond yields
generally moved higher. From November 1998 through mid-January 1999,
long-term bond yields traded in a relatively narrow range. However,
during February, a number of economic indicators were released that
suggested that economic growth in the United States would likely
remain strong throughout most of 1999. Consequently, long-term US
Treasury bond yields rose more than 60 basis points (0.60%) to 5.70%
by early March. During the remainder of the six-month period, US
Treasury bond yields traded between 5.50% and 5.70% as the lack of
inflationary pressures offset much of the concerns generated by
continued strong economic growth. During most of the period, long-
term, uninsured tax-exempt bond yields exhibited far less volatility
and were largely stable. Also, long-term municipal bond yields rose
just 5 basis points to 5.29% at the end of April 1999, as measured
by the Bond Buyer Revenue Bond Index.

In recent months, the tax-exempt market was better able to withstand
much of the upward pressure on bond yields because of its stronger
technical position. While the continued positive inflationary
environment limited some of the recent increases in taxable bond
yields, a deteriorating supply/demand position helped push taxable
bond yields significantly higher than municipal bond yields. Much of
the US Treasury bond market's underperformance in recent months can
be attributed to the large amounts of taxable corporate issuance.
Large taxable corporate underwritings reduced the demand for US
Government securities in recent months, pushing US Treasury bond
yields higher.

On the other hand, the tax-exempt bond market enjoyed only limited
new-issue supply. During the six months ended April 30, 1999, more
than $123 billion in new long-term tax-exempt securities was
underwritten, a decline of 10% compared to the same period a year
ago. Municipalities issued less than $60 billion in long-term tax-
exempt securities during the three months ended April 30, 1999, a
decline of 25% compared to the April 30, 1998 quarter. More
recently, the rate of new tax-exempt issuance has declined even
further. During April 1999, just over $15 billion in long-term tax-
exempt securities was marketed, a decline of over 33% compared to
April 1998 levels. As municipal bond yields fell and stabilized in
recent quarters, the ability of municipalities to refinance existing
higher-couponed debt declined. This led to a significant decrease in
refunding issuance and an overall drop in new municipal bond supply.
When coupled with ongoing, moderate retail and institutional demand,
the tax-exempt bond market was able to avoid much of the yield
volatility exhibited by US Treasury securities.

Looking ahead, the expected combination of moderate economic growth
in the United States and continued negligible inflation suggests a
relatively stable interest rate environment. However, in recent
years, bond yields reached their annual peaks in early May and
declined for the remainder of the year. A meaningful decline in
fixed-income bond yields would require either evidence of a
significant slowdown in the US economy or the resumption of concerns
regarding renewed shocks to the world's economic system. Currently,
neither condition exists or seems likely in the immediate future. In
our opinion, this suggests a continuation of the narrow trading
ranges seen in recent months.


MuniYield Pennsylvania Fund
April 30, 1999


Portfolio Strategy
During the last several months, we adopted a neutral investment
strategy, since indicators pointed to a continuation of both benign
inflation and healthy domestic economic growth. These favorable
conditions led us to believe that long-term tax-exempt bond yields
would remain trading within a somewhat narrow range. Therefore, we
chose to focus on income-producing securities rather than on those
issues with the potential for capital gains. We believed that coupon
income could be the more significant segment for the Fund if the tax-
exempt bond market performed as anticipated. Keeping shareholder
income in mind, MuniYield Pennsylvania Fund remained fully invested
for most of the past several months, and we expect to maintain this
position going forward.

Short-term tax-exempt yields exhibited considerable volatility in
recent months. Interest rates paid to the Fund's Preferred
Shareholders traded below 3% in December 1998, reflecting heightened
investor demand at year-end. Current short-term interest rate levels
reflect tax season-related pressures, which we expect to abate soon.
During the six-month period ended April 30, 1999, leveraging
generated a significant incremental yield to the Fund's Common
Shareholders. Because we believe that the Federal Reserve Board's
monetary policy is likely to remain in a narrow range for the
remainder of the year, we expect short-term tax-exempt interest
rates to remain at, or slightly below, current levels. However,
should the spread between short-term and long-term interest rates
narrow, the benefits of the leverage will decline and, as a result,
reduce the yield to the Fund's Common Shares. (For a complete
explanation of the benefits and risks of leveraging, see page 4 of
this report to shareholders.)


In Conclusion
We appreciate your ongoing interest in MuniYield Pennsylvania Fund,
and we look forward to serving your investment needs in the months
and years ahead.


Sincerely,



(Terry K. Glenn)
Terry K. Glenn
President



(Vincent R. Giordano)
Vincent R. Giordano
Senior Vice President



(William R. Bock)
William R. Bock
Vice President and Portfolio Manager



June 3, 1999



After more than 20 years of service, Arthur Zeikel recently retired
as Chairman of Merrill Lynch Asset Management, L.P. (MLAM). Mr.
Zeikel served as President of MLAM from 1977 to 1997 and as Chairman
since December 1997. Mr. Zeikel is one of the country's most
respected leaders in asset management and presided over the growth
of Merrill Lynch's asset management business. During his tenure,
client assets under management grew from $300 million to over $500
billion. Mr. Zeikel will remain on MuniYield Pennsylvania Fund's
Board of Trustees. We are pleased to announce that Terry K. Glenn
has been elected President and Trustee of the Fund. Mr. Glenn has
held the position of Executive Vice President of MLAM since 1983.

Mr. Zeikel's colleagues at MLAM join the Fund's Board of Trustees in
wishing him well in his retirement from Merrill Lynch and are
pleased that he will continue as a member of the Fund's Board of
Trustees.


MuniYield Pennsylvania Fund
April 30, 1999


<TABLE>
PROXY RESULTS
<CAPTION>
During the six-month period ended April 30, 1999, MuniYield
Pennsylvania Fund's Common Shareholders voted on the following
proposals. Proposals 1 and 2 were approved at a shareholders'
meeting on April 21, 1999. The meeting was adjourned with respect to
Proposal 3. The description of each proposal and number of shares
voted are as follows:

                                                                        Shares                          Shares Withheld
                                                                      Voted For                           From Voting
<S>                                        <S>                        <C>                                    <C>
1. To elect the Fund's Trustees:           Terry K. Glenn             2,317,329                              42,400
                                           Edward H. Meyer            2,316,315                              43,414
                                           Jack B. Sunderland         2,316,315                              43,414
                                           J. Thomas Touchton         2,317,329                              42,400
                                           Fred G. Weiss              2,317,329                              42,400
                                           Arthur Zeikel              2,316,315                              43,414

                                                                        Shares          Shares Voted       Shares Voted
                                                                      Voted For            Against           Abstain

2. To ratify the selection of Deloitte & Touche LLP as the Fund's
   independent auditors for the current fiscal year.                  2,313,990             24,783           20,956

3. To approve an amendment to the Articles Supplementary
   of the Fund.                                                       Adjourned           Adjourned         Adjourned

<CAPTION>
During the six-month period ended April 30, 1999, MuniYield
Pennsylvania Fund's Preferred Shareholders voted on the following
proposals. Proposals 1 and 2 were approved at a shareholders'
meeting on April 21, 1999. The meeting was adjourned with respect to
Proposal 3. The description of each proposal and number of shares
voted are as follows:

                                                                       Shares                           Shares Withheld
                                                                      Voted For                           From Voting
<S>                                                                     <C>                                    <C>
1. To elect the Fund's Board of Trustees:
   Terry K. Glenn, Donald Cecil, M. Colyer Crum,
   Edward H. Meyer, Jack B. Sunderland,
   J. Thomas Touchton, Fred G. Weiss and Arthur Zeikel                  1,547                                  0

                                                                        Shares          Shares Voted       Shares Voted
                                                                      Voted For            Against           Abstain

2. To ratify the selection of Deloitte & Touche LLP as the Fund's
   independent auditors for the current fiscal year.                    1,547                0                  0

3. To approve an amendment to the Articles Supplementary
   of the Fund.                                                        Adjourned         Adjourned           Adjourned
</TABLE>


MuniYield Pennsylvania Fund
April 30, 1999


THE BENEFITS AND RISKS OF LEVERAGING


MuniYield Pennsylvania Fund utilizes leveraging to seek to enhance
the yield and net asset value of its Common Shares. However, these
objectives cannot be achieved in all interest rate environments. To
leverage, the Fund issues Preferred Shares, which pay dividends at
prevailing short-term interest rates, and invests the proceeds in
long-term municipal bonds. The interest earned on these investments
is paid to Common Shareholders in the form of dividends, and the
value of these portfolio holdings is reflected in the per share net
asset value of the Fund's Common Shares. However, in order to
benefit Common Shareholders, the yield curve must be positively
sloped; that is, short-term interest rates must be lower than long-
term interest rates. At the same time, a period of generally
declining interest rates will benefit Common Shareholders. If either
of these conditions change, then the risks of leveraging will begin
to outweigh the benefits.

To illustrate these concepts, assume a fund's Common Share
capitalization of $100 million and the issuance of Preferred Shares
for an additional $50 million, creating a total value of $150
million available for investment in long-term municipal bonds. If
prevailing short-term interest rates are approximately 3% and long-
term interest rates are approximately 6%, the yield curve has a
strongly positive slope. The fund pays dividends on the $50 million
of Preferred Shares based on the lower short-term interest rates. At
the same time, the fund's total portfolio of $150 million earns the
income based on long-term interest rates. Of course, increases in
short-term interest rates would reduce (and even eliminate) the
dividends on the Common Shares.

In this case, the dividends paid to Preferred Shareholders are
significantly lower than the income earned on the fund's long-term
investments, and therefore the Common Shareholders are the
beneficiaries of the incremental yield. However, if short-term
interest rates rise, narrowing the differential between short-term
and long-term interest rates, the incremental yield pickup on the
Common Shares will be reduced or eliminated completely. At the same
time, the market value of the fund's Common Shares (that is, their
price as listed on the New York Stock Exchange) may, as a result,
decline. Furthermore, if long-term interest rates rise, the Common
Shares' net asset value will reflect the full decline in the price
of the portfolio's investments, since the value of the fund's
Preferred Shares does not fluctuate. In addition to the decline in
net asset value, the market value of the fund's Common Shares may
also decline.

As a part of its investment strategy, the Fund may invest in certain
securities whose potential income return is inversely related to
changes in a floating interest rate ("inverse floaters"). In
general, income on inverse floaters will decrease when short-term
interest rates increase and increase when short-term interest rates
decrease. Investments in inverse floaters may be characterized as
derivative securities and may subject the Fund to the risks of
reduced or eliminated interest payments and losses of invested
principal. In addition, inverse floaters have the effect of
providing investment leverage and, as a result, the market value of
such securities will generally be more volatile than that of fixed-
rate, tax-exempt securities. To the extent the Fund invests in
inverse floaters, the market value of the Fund's portfolio and the
net asset value of the Fund's shares may also be more volatile than
if the Fund did not invest in these securities.


MuniYield Pennsylvania Fund
April 30, 1999


YEAR 2000 ISSUES


Many computer systems were designed using only two digits to
designate years. These systems may not be able to distinguish the
Year 2000 from the Year 1900 (commonly known as the "Year 2000
Problem"). The Fund could be adversely affected if the computer
systems used by the Fund's management or other Fund service
providers do not properly address this problem before January 1,
2000. The Fund's management expects to have addressed this problem
before then, and does not anticipate that the services it provides
will be adversely affected. The Fund's other service providers have
told the Fund's management that they also expect to resolve the Year
2000 Problem, and the Fund's management will continue to monitor the
situation as the Year 2000 approaches. However, if the problem has
not been fully addressed, the Fund could be negatively affected. The
Year 2000 Problem could also have a negative impact on the
securities in which the Fund invests, and this could hurt the Fund's
investment returns.


MANAGED DIVIDEND POLICY


The Fund's dividend policy is to distribute substantially all of its
net investment income to its shareholders on a monthly basis.
However, in order to provide shareholders with a more consistent
yield to the current trading price of Common Shares of the Fund, the
Fund may at times pay out less than the entire amount of net
investment income earned in any particular month and may at times in
any month pay out such accumulated but undistributed income in
addition to net investment income earned in that month. As a result,
the dividends paid by the Fund for any particular month may be more
or less than the amount of net investment income earned by the Fund
during such month. The Fund's current accumulated but undistributed
net investment income, if any, is disclosed in the Statement of
Assets, Liabilities and Capital, which comprises part of the
Financial Information included in this report.



PORTFOLIO ABBREVIATIONS


To simplify the listings of MuniYield Pennsylvania Fund's portfolio
holdings in the Schedule of Investments, we have abbreviated the
names of many of the securities according to the list below and at
right.

AMT       Alternative Minimum Tax (subject to)
GO        General Obligation Bonds
HFA       Housing Finance Agency
IDA       Industrial Development Authority
PCR       Pollution Control Revenue Bonds
RITR      Residual Interest Trust Receipts
S/F       Single-Family
VRDN      Variable Rate Demand Notes



MuniYield Pennsylvania Fund
April 30, 1999

<TABLE>
SCHEDULE OF INVESTMENTS                                                                              (in Thousands)
<CAPTION>
S&P      Moody's   Face                                                                                         Value
Ratings Ratings   Amount                              Issue                                                   (Note 1a)

Pennsylvania--100.1%
<S>      <S>     <C>        <S>                                                                                 <C>
                            Allegheny County, Pennsylvania, Hospital Development Authority
                            Revenue Bonds, Series A:
AAA      Aaa     $2,000       (Allegheny General Hospital Project), 6.25% due 9/01/2020 (d)                     $  2,020
NR*      A2       3,000       (South Hills Health System), 6.50% due 5/01/2014                                     3,261

BBB-     Baa2     2,680     Allegheny County, Pennsylvania, IDA, Environmental Improvement Revenue
                            Refunding Bonds (USX Corp.), 5.60% due 9/01/2030                                       2,682

AAA      Aaa      5,750     Allegheny County, Pennsylvania, Sanitation Authority, Sewer Revenue Bonds,
                            RITR, Series 20, 6.37% due 12/01/2024 (g)                                              6,015

NR*      Aaa      2,000     Delaware County, Pennsylvania, University Authority Revenue Bonds
                            (Villanova University), Series A, 5% due 12/01/2028 (d)                                1,943

AAA      Aaa      4,500     Delaware Valley, Pennsylvania, Regional Finance Authority, Local Government
                            Revenue Bonds, Series A, 5.50% due 8/01/2028 (a)                                       4,829

NR*      Aaa      1,000     Lancaster, Pennsylvania, Area Sewer Authority Revenue Bonds, 4.50% due 4/01/2018 (d)     927

AAA      Aaa      4,000     Lehigh County, Pennsylvania, General Purpose Authority Revenue Bonds (Saint Lukes
                            Hospital--Bethlehem), 6.25% due 7/01/2022 (a)                                          4,332

AAA      Aaa      3,000     Lehigh County, Pennsylvania, IDA, PCR, Refunding (Pennsylvania Power and
                            Light Company Project), Series A, 6.40% due 11/01/2021 (d)                             3,287

AAA      Aaa      2,570     Lower Providence Township, Pennsylvania, Sewer Authority, Sewer Revenue
                            Refunding Bonds, 5.25% due 5/01/2022 (d)                                               2,583

A-       A3       1,500     Luzerne County, Pennsylvania, IDA, Exempt Facilities Revenue Bonds
                            (Pennsylvania Gas and Water Company Project), AMT, Series B, 7.125% due 12/01/2022     1,656

                            Luzerne County, Pennsylvania, IDA, Exempt Facilities Revenue Refunding
                            Bonds (Pennsylvania Gas and Water Company Project), AMT, Series A:
A        A3       2,500       7.20% due 10/01/2017                                                                 2,756
AAA      Aaa      2,000       7% due 12/01/2017 (a)                                                                2,280

                            Montgomery County, Pennsylvania, IDA, PCR, Refunding:
A        Baa1     1,800       (Philadelphia Electric Company), AMT, Series A, 7.60% due 4/01/2021                  1,927
AAA      Aaa      4,400       Series B, 6.70% due 12/01/2021 (d)                                                   4,753

AAA      Aaa      2,000     Northeastern, Pennsylvania, Hospital and Education Authority, Health
                            Care Revenue Bonds (Wyoming Valley Health Care), Series A, 5.25% due 1/01/2026 (a)     1,980

BBB      Baa2     4,000     Pennsylvania Economic Development Financing Authority, Wastewater
                            Treatment Revenue Bonds (Sun Company Inc.--R & M Project), AMT,
                            Series A, 7.60% due 12/01/2024                                                         4,519
A
AA       Aaa      4,000     Pennsylvania HFA, Revenue Refunding Bonds (Rental Housing), 6.50%
                            due 7/01/2023 (e)                                                                      4,261
</TABLE>



MuniYield Pennsylvania Fund
April 30, 1999

<TABLE>
SCHEDULE OF INVESTMENTS (continued)                                                                   (in Thousands)
<CAPTION>
S&P      Moody's   Face                                                                                         Value
Ratings Ratings   Amount                              Issue                                                   (Note 1a)

Pennsylvania (continued)
<S>      <S>     <C>        <S>                                                                                 <C>
                            Pennsylvania HFA, S/F Mortgage Revenue Bonds, AMT:
AA+      Aa      $2,630       Series 34B, 7% due 4/01/2024                                                      $  2,737
AA+      Aa2      1,720       Series 60A, 5.85% due 10/01/2027                                                     1,794
AA+      Aa2      1,000       Series 62A, 5.50% due 10/01/2022                                                     1,013

AA+      Aa       3,000     Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds, AMT,
                            Series 41B, 6.65% due 4/01/2025                                                        3,206

AAA      Aaa      2,000     Pennsylvania Intergovernmental Cooperative Authority, Special Tax Revenue
                            Refunding Bonds (Philadelphia Funding Program), 5.25% due 6/15/2016 (b)                2,047

A        NR*      2,000     Pennsylvania State Finance Authority, Revenue Refunding Bonds
                            (Municipal Capital Improvements Program), 6.60% due 11/01/2009                         2,212

                            Pennsylvania State, GO:
AAA      Aaa      2,850       First Series, 5.125% due 3/15/2011 (a)                                               2,970
AAA      Aaa      2,500       Second Series, 5% due 8/01/2018 (b)                                                  2,488

AAA      Aaa      2,000     Pennsylvania State Higher Educational Assistance Agency, Student Loan
                            Revenue Bonds, AMT, Series C, 7.15% due 9/01/2021 (a)                                  2,246

AAA      Aaa      1,255     Pennsylvania State Higher Educational Facilities Authority, College and
                            University Revenue Refunding Bonds (Duquesne University), Series A,
                            6.75% due 4/01/2020 (d)                                                                1,320

AAA      Aaa      3,500     Pennsylvania State Higher Educational Facilities Authority Revenue
                            Bonds (UPMC Health System), Series A, 5% due 8/01/2029 (c)                             3,358

A1+      NR*      2,000     Pennsylvania State Higher Educational Facilities Authority Revenue
                            Refunding Bonds (Carnegie Mellon University), VRDN, Series C, 4.20%
                            due 11/01/2029 (f)                                                                     2,000

                            Pennsylvania State Turnpike Commission, Oil Franchise Tax Revenue Bonds (a):
AAA      Aaa      2,075       Senior Series A, 4.75% due 12/01/2027                                                1,943
AAA      Aaa      3,670       Sub-Series B, 4.75% due 12/01/2027                                                   3,436

AA-      Aa3      2,500     Pennsylvania State University, Revenue Refunding Bonds, 6.25% due 3/01/2011            2,688

AAA      Aaa      1,500     Philadelphia, Pennsylvania, Airport Revenue Bonds (Philadelphia Airport
                            System), AMT, Series B, 5.40% due 6/15/2027 (b)                                        1,509

AAA      Aaa      1,500     Philadelphia, Pennsylvania, Authority for Industrial Development,
                            Airport Revenue Bonds (Philadelphia Airport System Project), AMT,
                            Series A, 5.125% due 7/01/2028 (b)                                                     1,459

AA       Aa3      2,000     Philadelphia, Pennsylvania, Authority for Industrial Development,
                            Industrial and Commercial Revenue Bonds (Girard Estates Facilities
                            Leasing Project), 5% due 5/15/2027                                                     1,924

AAA      Aaa      4,000     Philadelphia, Pennsylvania, Authority for Industrial Development,
                            Lease Revenue Bonds (City of Philadelphia Project), Series A, 5.375%
                            due 2/15/2027 (d)                                                                      4,087

AAA      Aaa      3,700     Philadelphia, Pennsylvania, GO, 5% due 3/15/2028 (c)                                   3,595

                            Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities
                            Authority, Hospital Revenue Bonds (Children's Hospital of Philadelphia
                            Project),VRDN (f):
A1+      VMIG1++  1,100       4.20% due 3/01/2027                                                                  1,100
A1+      VMIG1++  3,500       Series A, 4.20% due 3/01/2027                                                        3,500

                            Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities
                            Authority, Hospital Revenue Refunding Bonds:
A-       NR*      1,000       (Children's Seashore House), Series B, 7% due 8/15/2022                              1,085
AAA      NR*      3,000       (Presbyterian Medical Center), 6.65% due 12/01/2019 (h)                              3,599

                            Schuylkill County, Pennsylvania, IDA, Resource Recovery
                            Revenue Refunding Bonds (Northeastern Power Company), VRDN (f):
A1+      NR*      1,000       AMT, Series B, 4.20% due 12/01/2022                                                  1,000
A1+      NR*        300       Series A, 4.10% due 12/01/2022                                                         300
</TABLE>



MuniYield Pennsylvania Fund
April 30, 1999

<TABLE>
SCHEDULE OF INVESTMENTS (concluded)                                                                   (in Thousands)
<CAPTION>
S&P      Moody's   Face                                                                                         Value
Ratings Ratings   Amount                              Issue                                                   (Note 1a)

Pennsylvania (concluded)
<S>      <S>     <C>        <S>                                                                                 <C>
A-       NR*     $2,520     Scranton-Lackawanna, Pennsylvania, Health and Welfare
                            Authority, Revenue Refunding Bonds (University of Scranton
                            Project), Series B, 6.50% due 3/01/2015                                             $  2,682

NR*      Aaa      5,000     Somerset County, Pennsylvania, GO, Series A, 5% due 10/01/2027 (b)                     4,859

AA+      Aaa      3,985     Swarthmore Borough Authority, Pennsylvania, College Revenue
                            Refunding Bonds, 6% due 9/15/2020                                                      4,306

AA       Aa3      3,500     Upper Saint Clair Township School District, Pennsylvania, GO,
                            Refunding, 5.20% due 7/15/2027                                                         3,495

Total Investments (Cost--$123,609)--100.1%                                                                       129,969

Liabilities in Excess of Other Assets--(0.1%)                                                                       (161)
                                                                                                                --------
Net Assets--100.0%                                                                                              $129,808
                                                                                                                ========


<FN>
(a)AMBAC Insured.
(b)FGIC Insured.
(c)FSA Insured.
(d)MBIA Insured.
(e)FNMA Collateralized.
(f)The interest rate is subject to change periodically
   based upon prevailing market rates. The interest
   rate shown is the rate in effect at April 30, 1999.
(g)The interest rate is subject to change periodically
   and inversely based upon prevailing market rates.
   The interest rate shown is the rate in effect at
   April 30, 1999.
(h)Escrowed to maturity.
  *Not Rated.
 ++Highest short-term rating by Moody's Investors Service, Inc.

See Notes to Financial Statements.
</TABLE>


QUALITY PROFILE


The quality ratings of securities in the
Fund as of April 30, 1999 were as follows:

                                 Percent of
S&P Rating/Moody's Rating        Net Assets

AAA/Aaa                             63.5%
AA/Aa                               13.0
A/A                                 12.0
BBB/Baa                              5.5
Other++                              6.1

[FN]
++Temporary investments in short-term municipal securities.



MuniYield Pennsylvania Fund
April 30, 1999


FINANCIAL INFORMATION

<TABLE>
Statement of Assets, Liabilities and Capital as of April 30, 1999
<S>                 <S>                                                                    <C>              <C>
Assets:             Investments, at value (identified cost--$123,609,119) (Note 1a)                         $129,968,790
                    Cash                                                                                          65,150
                    Interest receivable                                                                        2,067,575
                    Prepaid expenses and other assets                                                              6,504
                                                                                                            ------------
                    Total assets                                                                             132,108,019
                                                                                                            ------------

Liabilities:        Payables:
                      Securities purchased                                                 $  2,058,113
                      Dividends to shareholders (Note 1e)                                       150,050
                      Investment adviser (Note 2)                                                57,077        2,265,240
                                                                                           ------------
                    Accrued expenses and other liabilities                                                        34,999
                                                                                                            ------------
                    Total liabilities                                                                          2,300,239
                                                                                                            ------------

Net Assets:         Net assets                                                                              $129,807,780
Capital:                                                                                                    ============
                    Capital Shares (unlimited number of shares of beneficial
                    interest authorized) (Note 4):
                      Preferred Shares, par value $.05 per share (1,600 shares
                      of AMPS* issued and outstanding at $25,000 per share                                 $  40,000,000
                      liquidation preference) Common Shares, par value $.10
                      per share (5,883,760 shares issued
                      and outstanding)                                                     $    588,376
                    Paid-in capital in excess of par                                         82,247,950
                    Undistributed investment income--net                                      1,172,691
                    Accumulated realized capital losses on investments--net                    (560,908)
                    Unrealized appreciation on investments--net                               6,359,671
                                                                                           ------------
                    Total--Equivalent to $15.26 net asset value per Common Share
                    (market price--$15.125)                                                                   89,807,780
                                                                                                            ------------
                    Total capital                                                                           $129,807,780
                                                                                                            ============
                    <FN>
                   *Auction Market Preferred Shares.

                    See Notes to Financial Statements.
</TABLE>


MuniYield Pennsylvania Fund
April 30, 1999


FINANCIAL INFORMATION (continued)

<TABLE>
Statement of Operations
<CAPTION>
                                                                                                For the Six Months Ended
                                                                                                          April 30, 1999
<S>                 <S>                                                                    <C>              <C>
Investment Income   Interest and amortization of premium and discount earned                                $  3,629,400
(Note 1d):

Expenses:           Investment advisory fees (Note 2)                                      $    326,589
                    Commission fees (Note 4)                                                     50,546
                    Professional fees                                                            30,750
                    Accounting services (Note 2)                                                 28,411
                    Transfer agent fees                                                          26,709
                    Printing and shareholder reports                                             13,678
                    Trustees' fees and expenses                                                  13,524
                    Listing fees                                                                  8,052
                    Custodian fees                                                                3,849
                    Pricing fees                                                                  3,496
                    Other                                                                         6,674
                                                                                           ------------
                    Total expenses                                                                               512,278
                                                                                                            ------------
                    Investment income--net                                                                     3,117,122
                                                                                                            ------------

Realized &          Realized gain on investments--net                                                            531,883
Unrealized Gain     Change in unrealized appreciation on investments--net                                     (1,983,280)
(Loss) on                                                                                                   ------------
Investments--Net    Net Increase in Net Assets Resulting from Operations                                    $  1,665,725
(Notes 1b, 1d & 3):                                                                                         ============


                    See Notes to Financial Statements.
</TABLE>



MuniYield Pennsylvania Fund
April 30, 1999


FINANCIAL INFORMATION (continued)

<TABLE>
Statements of Changes in Net Assets
<CAPTION>
                                                                                           For the Six        For the
                                                                                          Months Ended      Year Ended
Increase (Decrease) in Net Assets:                                                       April 30, 1999    Oct. 31, 1998
<S>                 <S>                                                                    <C>              <C>
Operations:         Investment income--net                                                 $  3,117,122     $  6,418,420
                    Realized gain on investments--net                                           531,883        3,150,329
                    Change in unrealized appreciation on investments--net                    (1,983,280)        (402,818)
                                                                                           ------------     ------------
                    Net increase in net assets resulting from operations                      1,665,725        9,165,931
                                                                                           ------------     ------------

Dividends &         Investment income--net:
Distributions to      Common Shares                                                          (2,676,473)      (5,040,266)
Shareholders          Preferred Shares                                                         (428,656)      (1,048,448)
(Note 1e):          Realized gain on investments--net:
                      Common Shares                                                          (2,632,068)      (1,574,973)
                      Preferred Shares                                                         (336,480)        (592,048)
                                                                                           ------------     ------------
                    Net decrease in net assets resulting from dividends and
                    distributions to shareholders                                            (6,073,677)      (8,255,735)
                                                                                           ------------     ------------

Beneficial          Value of shares issued to Common Shareholders in reinvestment
Interest            of dividends and distributions                                            1,448,899          785,969
Transactions                                                                               ------------     ------------
(Note 4):

Net Assets:         Total increase (decrease) in net assets                                  (2,959,053)       1,696,165
                    Beginning of period                                                     132,766,833      131,070,668
                                                                                           ------------     ------------
                    End of period*                                                         $129,807,780     $132,766,833
                                                                                           ============     ============
                   <FN>
                   *Undistributed investment income--net                                   $  1,172,691     $  1,160,698
                                                                                           ============     ============


                    See Notes to Financial Statements.
</TABLE>



MuniYield Pennsylvania Fund
April 30, 1999


FINANCIAL INFORMATION (concluded)

<TABLE>
Financial Highlights
<CAPTION>
The following per share data and ratios have been derived            For the Six
from information provided in the financial statements.               Months Ended                For the
                                                                      April 30,           Year Ended October 31,
Increase (Decrease) in Net Asset Value:                                  1999     1998       1997      1996        1995
<S>                 <S>                                               <C>        <C>       <C>       <C>        <C>
Per Share           Net asset value, beginning of period              $  16.01   $  15.86  $  15.32  $  15.36   $  13.86
Operating                                                             --------   --------  --------  --------   --------
Performance:        Investment income--net                                 .53       1.12      1.13      1.15       1.17
                    Realized and unrealized gain (loss) on
                    investments--net                                      (.24)       .46       .66      (.03)      1.53
                                                                      --------   --------  --------  --------   --------
                    Total from investment operations                       .29       1.58      1.79      1.12       2.70
                                                                      --------   --------  --------  --------   --------
                    Less dividends and distributions to Common
                    Shareholders:
                      Investment income--net                              (.46)      (.88)     (.89)     (.91)      (.89)
                      Realized gain on investments--net                   (.45)      (.27)     (.09)       --         --
                      In excess of realized gain on investments--net        --         --        --        --       (.05)
                                                                      --------   --------  --------  --------   --------
                    Total dividends and distributions to Common
                    Shareholders                                          (.91)     (1.15)     (.98)     (.91)      (.94)
                                                                      --------   --------  --------  --------   --------
                    Effect of Preferred Share activity:
                      Dividends and distributions to Preferred
                      Shareholders:
                        Investment income--net                            (.07)      (.18)     (.24)     (.25)      (.25)
                        Realized gain on investments--net                 (.06)      (.10)     (.03)       --         --
                        In excess of realized gain on investments--
                        net                                                 --         --        --        --       (.01)
                                                                      --------   --------  --------  --------   --------
                    Total effect of Preferred Share activity              (.13)      (.28)     (.27)     (.25)      (.26)
                                                                      --------   --------  --------  --------   --------
                    Net asset value, end of period                    $  15.26   $  16.01  $  15.86  $  15.32   $  15.36
                                                                      ========   ========  ========  ========   ========
                    Market price per share, end of period             $ 15.125   $  16.50  $14.8125  $ 14.125   $  13.75
                                                                      ========   ========  ========  ========   ========

Total Investment    Based on market price per share                     (2.97%)++  19.82%    12.15%     9.48%     34.17%
Return:**                                                             ========   ========  ========  ========   ========
                    Based on net asset value per share                   .89%++     8.58%    10.71%     6.30%     18.95%
                                                                      ========   ========  ========  ========   ========

Ratios to Average   Expenses                                              .78%*      .77%      .79%      .78%       .82%
Net Assets:***                                                        ========   ========  ========  ========   ========
                    Investment income--net                               4.77%*     4.90%     5.07%     5.14%      5.44%
                                                                      ========   ========  ========  ========   ========

Supplemental        Net assets, net of Preferred Shares, end of
Data:               period (in thousands)                             $ 89,808   $ 92,767  $ 91,071  $ 88,001   $ 88,226
                                                                      ========   ========  ========  ========   ========
                    Preferred Shares outstanding, end of
                    period (in thousands)                             $ 40,000   $ 40,000  $ 40,000  $ 40,000   $ 40,000
                                                                      ========   ========  ========  ========   ========
                    Portfolio turnover                                  16.87%     60.52%    70.14%    75.83%     43.59%
                                                                      ========   ========  ========  ========   ========

Leverage:           Asset coverage per $1,000                         $  3,245   $  3,319  $  3,277  $  3,200   $  3,206
                                                                      ========   ========  ========  ========   ========

Dividends           Investment income--net                            $    268   $    655  $    853  $    901   $    902
Per Share on                                                          ========   ========  ========  ========   ========
Preferred Shares
Outstanding:

                <FN>
                   *Annualized.
                  **Total investment returns based on market value, which can be
                    significantly greater or lesser than the net asset value, may result
                    in substantially different returns. Total investment returns exclude
                    the effects of sales loads.
                 ***Do not reflect the effect of dividends to Preferred Shareholders.
                  ++Aggregate total investment return.
                    See Notes to Financial Statements.
</TABLE>



MuniYield Pennsylvania
April 30, 1999


NOTES TO FINANCIAL STATEMENTS


1. Significant Accounting Policies:
MuniYield Pennsylvania Fund (the "Fund") is registered under the
Investment Company Act of 1940 as a non-diversified, closed-end
management investment company. The Fund's financial statements are
prepared in accordance with generally accepted accounting principles
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 Fund determines and makes
available for publication the net asset value of its Common Shares
on a weekly basis. The Fund's Common Shares are listed on the New
York Stock Exchange under the symbol MPA. The following is a summary
of significant accounting policies followed by the Fund.

(a) Valuation of investments--Municipal bonds are traded primarily
in the over-the-counter markets and are valued at the most recent
bid price or yield equivalent as obtained by the Fund's pricing
service from dealers that make markets in such securities. Financial
futures contracts and options thereon, which are traded on
exchanges, are valued at their closing prices as of the close of
such exchanges. Options written or purchased are valued at the last
sale price in the case of exchange-traded options. In the case of
options traded in the over-the-counter market, valuation is the last
asked price (options written) or the last bid price (options
purchased). 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 their fair value as determined in good faith
by or under the direction of the Board of Trustees of the Fund,
including valuations furnished by a pricing service retained by the
Fund, which may utilize a matrix system for valuations. The
procedures of the pricing service and its valuations are reviewed by
the officers of the Fund under the general supervision of the Board
of Trustees.

(b) Derivative financial instruments--The Fund may engage in various
portfolio strategies to seek to increase its return by hedging its
portfolio against adverse movements in the debt markets. Losses may
arise due to changes in the value of the contract or if the
counterparty does not perform under the contract.

* Financial futures contracts--The Fund may purchase or sell
financial futures contracts and options on such futures contracts
for the purpose of hedging the market risk on existing securities or
the intended purchase of securities. Futures contracts are contracts
for delayed delivery of securities at a specific future date and at
a specific price or yield. Upon entering into a contract, the Fund
deposits and maintains as collateral such initial margin as required
by the exchange on which the transaction is effected. Pursuant to
the contract, the Fund agrees to receive from or pay to the broker
an amount of cash equal to the daily fluctuation in value of the
contract. Such receipts or payments are known as variation margin
and are recorded by the Fund as unrealized gains or losses. When the
contract is closed, the Fund records a realized gain or loss equal
to the difference between the value of the contract at the time it
was opened and the value at the time it was closed.

* Options--The Fund is authorized to write covered call options and
purchase put options. When the Fund writes an option, an amount
equal to the premium received by the Fund is reflected as an asset
and an equivalent liability. The amount of the liability is
subsequently marked to market to reflect the current market value of
the option written.

When a security is purchased or sold through an exercise of an
option, the related premium paid (or received) is added to (or
deducted from) the basis of the security acquired or deducted from
(or added to) the proceeds of the security sold. When an option
expires (or the Fund enters into a closing transaction), the Fund
realizes a gain or loss on the option to the extent of the premiums
received or paid (or gain or loss to the extent the cost of the
closing transaction exceeds the premium paid or received).

Written and purchased options are non-income producing investments.

(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 its shareholders. Therefore, no Federal income tax
provision is required.

(d) Security transactions and investment income--Security
transactions are recorded on the dates the transactions are entered
into (the trade dates). Interest income is recognized on the accrual
basis. Discounts and market premiums are amortized into interest
income. Realized gains and losses on security transactions are
determined on the identified cost basis.


MuniYield Pennsylvania Fund
April 30, 1999


NOTES TO FINANCIAL STATEMENTS (concluded)


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

2. Investment Advisory Agreement and
Transactions with Affiliates:
The Fund 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 Fund's portfolio and
provides the necessary personnel, facilities, equipment and certain
other services necessary to the operations of the Fund. For such
services, the Fund pays a monthly fee at an annual rate of 0.50% of
the Fund's average weekly net assets, including proceeds from the
issuance of Preferred Shares.

Accounting services are provided to the Fund by FAM at cost.

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

3. Investments:
Purchases and sales of investments, excluding short-term securities,
for the six months ended April 30, 1999 were $21,163,543 and
$27,228,205, respectively.

Net realized gains for the six months ended April 30, 1999 and net
unrealized gains as of April 30, 1999 were as follows:


                                     Realized     Unrealized
                                      Gains         Gains

Long-term investments              $  531,883    $ 6,359,671
                                   ----------    -----------
Total                              $  531,883    $ 6,359,671
                                   ==========    ===========

As of April 30, 1999, net unrealized appreciation for Federal income
tax purposes aggregated $6,359,671, of which $6,505,665 related to
appreciated securities and $145,994 related to depreciated
securities. The aggregate cost of investments at April 30, 1999 for
Federal income tax purposes was $123,609,119.


4. Beneficial Interest Transactions:
The Fund is authorized to issue an unlimited number of shares of
beneficial interest, including Preferred Shares, par value $.10 per
share, all of which were initially classified as Common Shares. The
Board of Trustees is authorized, however, to reclassify any unissued
shares of beneficial interest without approval of the holders of
Common Shares.

Common Shares
Shares issued and outstanding during the six months ended April 30,
1999 and the year ended October 31, 1998 increased by 91,016 and
49,322, respectively, as a result of dividend reinvestment.

Preferred Shares
Auction Market Preferred Shares ("AMPS") are Preferred Shares of the
Fund, with a par value of $.05 per share and a liquidation
preference of $25,000 per share, that entitle their holders to
receive cash dividends at an annual rate that may vary for the
successive dividend periods. The yield in effect at April 30, 1999
was 3.25%.

Shares issued and outstanding during the six months ended April 30,
1999 and the year ended October 31, 1998 remained constant.

The Fund pays commissions to certain broker-dealers at the end of
each auction at an annual rate ranging from 0.25% to 0.375%,
calculated on the proceeds of each auction. For the six months ended
April 30, 1999, Merrill Lynch, Pierce, Fenner & Smith Incorporated,
an affiliate of FAM, earned $30,216 as commissions.


5. Subsequent Event:
On May 6, 1999, the Fund's Board of Trustees declared an ordinary
income dividend to holders of Common Shares in the amount of
$.066757 per share, payable on May 27, 1999 to shareholders of
record as of May 21, 1999.



MuniYield Pennsylvania Fund
April 30, 1999


OFFICERS AND TRUSTEES


Terry K. Glenn, President and Trustee
Donald Cecil, Trustee
M. Colyer Crum, Trustee
Edward H. Meyer, Trustee
Jack B. Sunderland, Trustee
J. Thomas Touchton, Trustee
Fred G. Weiss, Trustee
Arthur Zeikel, Trustee
Vincent R. Giordano, Senior Vice President
William R. Bock, Vice President
Kenneth A. Jacob, Vice President
Donald C. Burke, Vice President and Treasurer
Alice A. Pellegrino, Secretary


Gerald M. Richard, Treasurer of MuniYield Pennsylvania Fund has
recently retired. His colleagues at Merrill Lynch Asset Management,
L.P. join the Fund's Board of Trustees in wishing Mr. Richard well
in his retirement.


Custodian
State Street Bank and Trust Company
225 Franklin Street
Boston, MA 02110

Transfer Agents

Common Shares:
State Street Bank and Trust Company
225 Franklin Street
Boston, MA 02110

Preferred Shares:
IBJ Whitehall Bank & Trust Company
One State Street
New York, NY 10004

NYSE Symbol
MPA



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