MFS HIGH YIELD MUNICIPAL TRUST N-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF

REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-04992

MFS HIGH YIELD MUNICIPAL TRUST

(Exact name of registrant as specified in charter)

500 Boylston Street, Boston, Massachusetts 02116

(Address of principal executive offices) (Zip code)

Susan S. Newton

Massachusetts Financial Services Company

500 Boylston Street

Boston, Massachusetts 02116

(Name and address of agents for service)

Registrant’s telephone number, including area code: (617) 954-5000

Date of fiscal year end: November 30

Date of reporting period: February 28, 2011


ITEM 1. SCHEDULE OF INVESTMENTS.


LOGO


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – 157.4%

     

Airport & Port Revenue – 4.6%

     

Dallas Fort Worth, TX, International Airport Rev. Improvement, “B”, AGM, 5%, 2025

   $ 3,000,000       $ 2,990,550   

Maryland Economic Development Corp. Rev. (Port America Chesapeake Terminal Project), “B”, 5.75%, 2035

     285,000         262,964   

Port Authority NY & NJ, Cons Thirty Seventh, AGM, 5.125%, 2030

     1,450,000         1,479,537   

Port Authority NY & NJ, Special Obligation Rev. (JFK International Air Terminal LLC), 6%, 2036

     255,000         248,806   

Port Authority NY & NJ, Special Obligation Rev. (JFK International Air Terminal LLC), 6%, 2042

     290,000         280,787   
           
      $ 5,262,644   
           

General Obligations - General Purpose – 0.4%

     

Luzerne County, PA, AGM, 6.75%, 2023

   $ 455,000       $ 497,333   
           

General Obligations - Improvement – 0.3%

     

Guam Government, “A”, 6.75%, 2029

   $ 140,000       $ 147,504   

Guam Government, “A”, 7%, 2039

     160,000         167,502   
           
      $ 315,006   
           

General Obligations - Schools – 2.2%

     

Beverly Hills, CA, Unified School District (Election of 2008), Capital Appreciation, 0%, 2029

   $ 2,195,000       $ 718,316   

Beverly Hills, CA, Unified School District (Election of 2008), Capital Appreciation, 0%, 2031

     275,000         79,555   

Beverly Hills, CA, Unified School District (Election of 2008), Capital Appreciation, 0%, 2032

     280,000         74,659   

Beverly Hills, CA, Unified School District (Election of 2008), Capital Appreciation, 0%, 2033

     560,000         137,362   

Irving, TX, Independent School District, Capital Appreciation, “A”, PSF, 0%, 2016

     1,000,000         889,920   

Los Angeles, CA, Unified School District, “D”, 5%, 2034

     165,000         158,057   

San Jacinto, TX, Community College District, 5.125%, 2038

     430,000         433,363   
           
      $ 2,491,232   
           

Healthcare Revenue - Hospitals – 36.8%

     

Allegheny County, PA, Hospital Development Authority Rev. (University of Pittsburgh Medical Center), “A”, 5.375%, 2029

   $ 440,000       $ 435,670   

Allegheny County, PA, Hospital Development Authority Rev. (West Penn Allegheny Health), “A”, 5%, 2028

     435,000         293,016   

Allegheny County, PA, Hospital Development Authority Rev. (West Penn Allegheny Health), “A”, 5.375%, 2040

     625,000         404,856   

Atchison, KS, Hospital Rev. (Atchison Hospital Assn.), “A”, 6.75%, 2030

     320,000         283,702   

Brunswick, GA, Hospital Authority Rev. (Glynn-Brunswick Memorial Hospital), 5.625%, 2034

     170,000         164,516   

California Health Facilities Financing Authority Rev. (St. Joseph Health System), “A”, 5.75%, 2039

     185,000         177,021   

California Health Facilities Financing Authority Rev. (Sutter Health), “A”, 5%, 2042

     500,000         420,285   

California Health Facilities Financing Authority Rev. (Sutter Health), “B”, 5.875%, 2031

     660,000         665,445   

California Municipal Finance Authority Rev. (Eisenhower Medical Center), “A”, 5.75%, 2040

     40,000         36,329   

California Statewide Communities Development Authority Rev. (Catholic Healthcare West), “K”, ASSD GTY, 5.5%, 2041

     625,000         602,644   

California Statewide Communities Development Authority Rev. (Catholic Healthcare West), “L”, ASSD GTY, 5.25%, 2041

     870,000         807,830   

California Statewide Communities Development Authority Rev. (Children’s Hospital), 5%, 2047

     290,000         220,243   

Cullman County, AL, Health Care Authority (Cullman Regional Medical Center), “A”, 6.75%, 2029

     60,000         56,159   

Delaware County, PA, Authority Rev. (Mercy Health Corp.), ETM, 6%, 2016 (c)

     965,000         1,038,099   

Delaware County, PA, Authority Rev. (Mercy Health Corp.), ETM, 6%, 2026 (c)

     500,000         562,285   

 

1


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Healthcare Revenue - Hospitals – continued

     

Erie County, PA, Hospital Authority Rev. (St. Vincent’s Health), “A”, 7%, 2027

   $ 410,000       $ 399,459   

Gage County, NE, Hospital Authority No. 1, Health Care Facilities Rev. (Beatrice Community Hospital & Health Care Center), “B”, 6%, 2025

     70,000         67,781   

Gage County, NE, Hospital Authority No. 1, Health Care Facilities Rev. (Beatrice Community Hospital & Health Care Center), “B”, 6.5%, 2030

     230,000         220,013   

Gage County, NE, Hospital Authority No. 1, Health Care Facilities Rev. (Beatrice Community Hospital & Health Care Center), “B”, 6.75%, 2035

     195,000         188,001   

Garden City, MI, Hospital Finance Authority Rev. (Garden City Hospital), 5%, 2038

     500,000         318,370   

Harris County, TX, Health Facilities Development Corp., Hospital Rev. (Memorial Hermann Healthcare Systems), “B”, 7.25%, 2035

     205,000         222,378   

Idaho Health Facilities Authority Rev. (IHC Hospitals, Inc.), ETM, 6.65%, 2021 (c)

     2,750,000         3,495,635   

Illinois Finance Authority Rev. (Children’s Memorial Hospital), “A”, ASSD GTY, 5.25%, 2047

     870,000         795,293   

Illinois Finance Authority Rev. (Kewanee Hospital), 5.1%, 2031

     400,000         312,564   

Illinois Finance Authority Rev. (Provena Health), “A”, 7.75%, 2034

     485,000         529,848   

Illinois Finance Authority Rev. (Silver Cross Hospital & Medical Centers), 6.875%, 2038

     485,000         485,437   

Indiana Health & Educational Facilities Finance Authority Rev. (Sisters of St. Francis Health Services, Inc.), “E”, AGM, 5.25%, 2041

     660,000         610,249   

Indiana Health & Educational Facilities Finance Authority, Hospital Rev. (Clarian Health), “A”, 5%, 2039

     1,745,000         1,487,368   

Indiana Health & Educational Facilities Finance Authority, Hospital Rev. (Community Foundation of Northwest Indiana), 5.5%, 2037

     945,000         830,390   

Indiana Health & Educational Financing Authority Rev. (Community Foundation of Northwest Indiana ), “A”, 6%, 2034

     425,000         421,855   

Johnson City, TN, Health & Educational Facilities Board Hospital Rev. (Mountain States Health Alliance), “A”, 5.5%, 2031

     1,120,000         1,023,960   

Johnson City, TN, Health & Educational Facilities Board Hospital Rev. (Mountain States Health Alliance), “A”, 5.5%, 2036

     410,000         365,404   

Kentucky Economic Development Finance Authority, Hospital Facilities Rev. (Baptist Healthcare System), “A”, 5.375%, 2024

     300,000         309,963   

Kentucky Economic Development Finance Authority, Hospital Facilities Rev. (Baptist Healthcare System), “A”, 5.625%, 2027

     100,000         103,634   

Kentucky Economic Development Finance Authority, Hospital Facilities Rev. (Owensboro Medical Health System), “A”, 6.375%, 2040

     570,000         532,517   

Lake County, OH, Hospital Facilities Rev. (Lake Hospital Systems, Inc.), 5.625%, 2029

     435,000         410,453   

Lebanon County, PA, Health Facilities Authority Rev. (Good Samaritan Hospital), 5.9%, 2028

     210,000         187,520   

Louisiana Public Facilities Authority Hospital Rev. (Lake Charles Memorial Hospital), 6.375%, 2034

     880,000         801,548   

Louisville & Jefferson County, KY, Metro Government Health Facilities Rev. (Jewish Hospital & St. Mary’s Healthcare), 6.125%, 2037

     1,315,000         1,285,702   

Louisville & Jefferson County, KY, Metropolitan Government Healthcare Systems Rev. (Norton Healthcare, Inc.), 5.25%, 2036

     1,265,000         1,105,952   

Lufkin, TX, Health Facilities Development Corp. Rev. (Memorial Health System), 5.5%, 2032

     60,000         50,240   

Lufkin, TX, Health Facilities Development Corp. Rev. (Memorial Health System), 5.5%, 2037

     60,000         48,991   

Maryland Health & Higher Educational Facilities Authority Rev. (Anne Arundel Health System), “A”, 6.75%, 2039

     735,000         798,210   

Maryland Health & Higher Educational Facilities Authority Rev. (Washington County Hospital), 6%, 2043

     120,000         110,608   

Massachusetts Health & Educational Facilities Authority Rev. (Boston Medical Center), 5.25%, 2038

     1,000,000         823,530   

Massachusetts Health & Educational Facilities Authority Rev. (Jordan Hospital), “E”, 6.75%, 2033

     250,000         231,508   

 

2


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Healthcare Revenue - Hospitals – continued

     

Massachusetts Health & Educational Facilities Authority Rev. (Milford-Whitinsville Hospital), “C”, 5.25%, 2018

   $ 500,000       $ 468,525   

Massachusetts Health & Educational Facilities Authority Rev. (Quincy Medical Center), “A”, 6.5%, 2038

     485,000         401,391   

Montgomery, AL, Medical Clinic Board Health Care Facility Rev. (Jackson Hospital & Clinic), 5.25%, 2031

     125,000         105,799   

Montgomery, AL, Medical Clinic Board Health Care Facility Rev. (Jackson Hospital & Clinic), 5.25%, 2036

     825,000         679,973   

New Hampshire Business Finance Authority Rev. (Elliot Hospital Obligated Group), “A”, 6%, 2027

     585,000         573,546   

New Hampshire Health & Education Facilities Authority Rev. (Catholic Medical Center), “A”, 6.125%, 2012 (c)

     175,000         189,355   

New Hampshire Health & Education Facilities Authority Rev. (Catholic Medical Center), “A”, 6.125%, 2032

     25,000         24,119   

New Hampshire Health & Educational Facilities Authority Rev. (Memorial Hospital at Conway), 5.25%, 2021

     530,000         495,232   

New Hanover County, NC, Hospital Rev., AGM, 5.125%, 2031

     895,000         902,688   

New Jersey Health Care Facilities, Financing Authority Rev. (St. Peter’s University Hospital), 5.75%, 2037

     545,000         452,230   

New Mexico Hospital Equipment Loan Council, Hospital Rev. (Rehoboth McKinley Christian Hospital), “A”, 5%, 2017

     285,000         263,887   

New York Dormitory Authority Rev., Non-State Supported Debt (Bronx-Lebanon Hospital Center), LOC, 6.5%, 2030

     190,000         202,852   

New York Dormitory Authority Rev., Non-State Supported Debt (Bronx-Lebanon Hospital Center), LOC, 6.25%, 2035

     115,000         120,490   

Norman, OK, Regional Hospital Authority Rev., 5%, 2027

     155,000         129,887   

Norman, OK, Regional Hospital Authority Rev., 5.375%, 2029

     90,000         76,953   

Norman, OK, Regional Hospital Authority Rev., 5.375%, 2036

     235,000         188,945   

Norman, OK, Regional Hospital Authority Rev., 5.125%, 2037

     415,000         318,139   

Olympia, WA, Healthcare Facilities Authority Rev. (Catholic Health Initiatives), “D”, 6.375%, 2036

     1,095,000         1,161,313   

Orange County, FL, Health Facilities Authority Hospital Rev. (Orlando Regional Healthcare), 5.75%, 2012 (c)

     150,000         163,220   

Palomar Pomerado Health Care District, CA, COP, 6.75%, 2039

     1,010,000         1,010,535   

Philadelphia, PA, Hospitals & Higher Education Facilities Authority Rev. (Temple University Health System), “A”, 6.625%, 2023

     375,000         375,004   

Philadelphia, PA, Hospitals & Higher Education Facilities Authority Rev. (Temple University Health System), “A”, 5.5%, 2030

     480,000         422,280   

Rhode Island Health & Educational Building Corp. Rev., Hospital Financing (Lifespan Obligated Group), “A”, ASSD GTY, 7%, 2039

     660,000         711,922   

Royal Oak, MI, Hospital Finance Authority Rev. (William Beaumont Hospital), 8.25%, 2039

     485,000         549,781   

Salida, CO, Hospital District Rev., 5.25%, 2036

     734,000         598,416   

Scottsdale, AZ, Industrial Development Authority, Hospital Rev. (Scottsdale Healthcare), “C”, ASSD GTY, 5%, 2035

     60,000         55,256   

Skagit County, WA, Public Hospital District No. 001 Rev. (Skagit Valley Hospital), 5.75%, 2032

     90,000         81,319   

South Lake County, FL, Hospital District Rev. (South Lake Hospital), 6.375%, 2034

     250,000         247,428   

South Lake County, FL, Hospital District Rev. (South Lake Hospital), “A”, 6%, 2029

     85,000         82,623   

South Lake County, FL, Hospital District Rev. (South Lake Hospital), “A”, 6.25%, 2039

     125,000         120,826   

Southwestern, IL, Development Authority Rev. (Anderson Hospital), 5.375%, 2015

     427,000         428,038   

Southwestern, IL, Development Authority Rev. (Anderson Hospital), 5.5%, 2020

     550,000         537,323   

Southwestern, IL, Development Authority Rev. (Anderson Hospital), 5.125%, 2026

     500,000         436,675   

Sullivan County, TN, Health, Educational & Housing Facilities Board Hospital Rev. (Wellmont Health Systems Project), “C”, 5.25%, 2036

     1,085,000         891,664   

 

3


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Healthcare Revenue - Hospitals – continued

     

Sumner County, TN, Health, Educational & Housing Facilities Board Rev. (Sumner Regional Health Systems, Inc.), “A”, 5.5%, 2046 (a)

   $ 375,000       $ 20,625   

Tyler, TX, Health Facilities Development Corp. (East Texas Medical Center), “A”, 5.25%, 2032

     230,000         183,269   

Tyler, TX, Health Facilities Development Corp. (East Texas Medical Center), “A”, 5.375%, 2037

     190,000         148,571   

Virginia Small Business Financing Authority, Hospital Rev. (Wellmont Health Project), “A”, 5.25%, 2037

     470,000         387,026   

Washington Health Care Facilities Authority Rev. (Multicare Health Systems), “B”, ASSD GTY, 6%, 2039

     440,000         453,495   

West Contra Costa, CA, Healthcare District, AMBAC, 5.5%, 2029

     105,000         105,752   

Wisconsin Health & Educational Facilities Authority Rev. (Aurora Health Care, Inc.), 6.4%, 2033

     350,000         354,515   

Wisconsin Health & Educational Facilities Authority Rev. (Fort Healthcare, Inc.), 6.1%, 2034

     750,000         693,218   

Wisconsin Health & Educational Facilities Authority Rev. (Wheaton Franciscan Services), 5.75%, 2012 (c)

     450,000         477,333   

Wisconsin Health & Educational Facilities Authority Rev. (Wheaton Franciscan Services), 5.25%, 2034

     935,000         783,483   

Wisconsin Health & Educational Facilities Authority Rev. (Wheaton Franciscan Services), “A”, 5.25%, 2025

     390,000         357,396   
           
      $ 42,174,798   
           

Healthcare Revenue - Long Term Care – 24.1%

     

ABAG Finance Authority for Non-Profit Corps., CA, Rev. (Casa de las Campanas), CHCLI, 6%, 2037

   $ 90,000       $ 85,325   

Abilene, TX, Health Facilities Development Corp., Retirement Facilities Rev. (Sears Methodist Retirement Systems, Inc.), “A”, 5.9%, 2025

     750,000         600,263   

Abilene, TX, Health Facilities Development Corp., Retirement Facilities Rev. (Sears Methodist Retirement Systems, Inc.), “A”, 7%, 2033

     200,000         166,880   

Boston, MA, Industrial Development Financing Authority Rev. (Springhouse, Inc.), 5.875%, 2020

     235,000         218,148   

Bucks County, PA, Industrial Development Authority Retirement Community Rev. (Ann’s Choice, Inc.), “A”, 6.125%, 2025

     500,000         467,450   

Bucks County, PA, Industrial Development Authority Rev. (Lutheran Community Telford Center), 5.75%, 2027

     90,000         74,305   

Bucks County, PA, Industrial Development Authority Rev. (Lutheran Community Telford Center), 5.75%, 2037

     120,000         91,211   

California Statewide Communities Development Authority Rev. (American Baptist Homes of the West), 6.25%, 2039

     215,000         201,707   

Capital Projects Finance Authority, FL (Glenridge on Palmer Ranch), “A”, 8%, 2012 (c)

     500,000         550,900   

Chartiers Valley, PA, Industrial & Commercial Development Authority (Friendship Village), “A”, 5.75%, 2020

     1,000,000         999,890   

Chartiers Valley, PA, Industrial & Commercial Development Authority Rev. (Asbury Health Center), 6.375%, 2024

     1,000,000         937,720   

Colorado Health Facilities Authority Rev. (American Housing Foundation, Inc.), 8.5%, 2011 (c)

     515,000         543,083   

Colorado Health Facilities Authority Rev. (Christian Living Communities Project), “A”, 5.75%, 2037

     475,000         394,678   

Colorado Health Facilities Authority Rev. (Covenant Retirement Communities, Inc.), 5%, 2035

     1,100,000         860,981   

Colorado Health Facilities Authority Rev. (Evangelical Lutheran), “A”, 6.125%, 2038

     120,000         120,143   

Columbus, GA, Housing Authority Rev. (Calvary Community, Inc.), 7%, 2019

     370,000         328,382   

Cumberland County, PA, Municipal Authority Rev. (Diakon Lutheran Social Ministries), 6.125%, 2029

     695,000         698,141   

Fulton County, GA, Residential Care Facilities (Canterbury Court), “A”, 6.125%, 2026

     500,000         444,965   

 

4


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Healthcare Revenue - Long Term Care – continued

     

Hamden, CT, Facility Rev. (Whitney Center Project), “A”, 7.625%, 2030

   $ 65,000       $ 66,700   

Hamden, CT, Facility Rev. (Whitney Center Project), “A”, 7.75%, 2043

     325,000         331,039   

Hawaii Department of Budget & Finance, Special Purpose Rev. (15 Craigside Project), “A”, 9%, 2044

     140,000         155,389   

Houston, TX, Health Facilities Development Corp. (Buckingham Senior Living Community), “A”, 7%, 2014 (c)

     500,000         586,870   

Howard County, MD, Retirement Facilities Rev. (Vantage House Corp.), “A”, 5.25%, 2033

     200,000         144,048   

Illinois Finance Authority Rev. (Evangelical Retirement Homes of Greater Chicago, Inc.), 7.25%, 2045

     850,000         818,899   

Illinois Finance Authority Rev. (Smith Village), “A”, 6.25%, 2035

     1,000,000         819,960   

Illinois Health Facilities Authority Rev. (Smith Crossing), “A”, 7%, 2032

     525,000         454,881   

Indiana Health Facilities Financing Authority Rev. (Hoosier Care, Inc.), “A”, 7.125%, 2034

     985,000         852,035   

Iowa Finance Authority, Health Care Facilities Rev. (Care Initiatives), 9.25%, 2011 (c)

     860,000         909,579   

Iowa Finance Authority, Health Care Facilities Rev. (Care Initiatives), “B”, 5.75%, 2018

     460,000         432,184   

Iowa Finance Authority, Health Care Facilities Rev. (Care Initiatives), “B”, 5.75%, 2028

     1,475,000         1,208,232   

James City County, VA, Economic Development (WindsorMeade Project), “A”, 5.5%, 2037

     440,000         251,456   

Kentucky Economic Development Finance Authority Health Facilities Rev. (AHF/Kentucky-Iowa, Inc.), 8%, 2029

     353,000         341,580   

La Verne, CA, COP (Brethren Hillcrest Homes), “B”, 6.625%, 2025

     525,000         500,005   

Massachusetts Development Finance Agency Rev. (Adventcare), “A”, 6.75%, 2037

     695,000         598,437   

Massachusetts Development Finance Agency Rev. (Alliance Health of Brockton, Inc.), “A”, 7.1%, 2032

     1,040,000         879,663   

Massachusetts Development Finance Agency Rev. (Linden Ponds, Inc.), “A”, 5.5%, 2027

     185,000         133,083   

Massachusetts Development Finance Agency Rev. (Linden Ponds, Inc.), “A”, 5.75%, 2035

     45,000         30,953   

Massachusetts Development Finance Agency Rev. (Loomis Communities, Inc.), “A”, 5.625%, 2015

     190,000         189,573   

Massachusetts Development Finance Agency Rev. (Loomis Communities, Inc.), “A”, 6.9%, 2032

     125,000         125,166   

Massachusetts Development Finance Agency Rev. (The Groves in Lincoln), “A”, 7.75%, 2039

     80,000         79,261   

Massachusetts Development Finance Agency Rev. (The Groves in Lincoln), “A”, 7.875%, 2044

     115,000         113,577   

Massachusetts Industrial Finance Agency Rev. (GF/Massachusetts, Inc.), 8.3%, 2023

     725,000         289,377   

Metropolitan Government of Nashville & Davidson County, TN, Health & Educational Facilities Board Rev. (Blakeford at Green Hills), 5.65%, 2024

     575,000         490,584   

Montgomery County, PA, Industrial Development Authority Rev. (Whitemarsh Continuing Care), 6.125%, 2028

     150,000         126,483   

Montgomery County, PA, Industrial Development Authority Rev. (Whitemarsh Continuing Care), 6.25%, 2035

     600,000         490,992   

New Jersey Economic Development Authority Rev. (Lions Gate), “A”, 5.75%, 2025

     400,000         360,372   

New Jersey Economic Development Authority Rev. (Lions Gate), “A”, 5.875%, 2037

     300,000         243,222   

New Jersey Economic Development Authority Rev. (Seabrook Village, Inc.), 5.25%, 2026

     500,000         423,300   

New Jersey Economic Development Authority Rev. (Seabrook Village, Inc.), 5.25%, 2036

     500,000         396,275   

Norfolk, VA, Redevelopment & Housing Authority Rev. (Fort Norfolk Retirement Community), “A”, 6.125%, 2035

     195,000         167,712   

Roseville, MN, Elder Care Facilities (Care Institute, Inc.), 7.75%, 2023

     1,630,000         1,254,774   

Savannah, GA, Economic Development Authority, First Mortgage (Marshes of Skidway), “A”, 7.4%, 2034

     350,000         318,248   

 

5


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Healthcare Revenue - Long Term Care – continued

     

Shelby County, TN, Health, Educational & Housing Facilities Board Rev. (Germantown Village), “A”, 7.25%, 2034

   $ 300,000       $ 275,301   

South Carolina Jobs & Economic Development Authority Rev. (Woodlands at Furman), “A”, 6%, 2027

     280,000         138,292   

South Carolina Jobs & Economic Development Authority Rev. (Woodlands at Furman), “A”, 6%, 2042

     260,000         127,083   

South Carolina Jobs & Economic Development Authority, Health Facilities Rev. (Wesley Commons), 5.3%, 2036

     200,000         146,674   

St. John’s County, FL, Industrial Development Authority Rev. (Glenmoor Project), “A”, 5.25%, 2026

     500,000         386,480   

St. John’s County, FL, Industrial Development Authority Rev. (Presbyterian Retirement), “A”, 6%, 2045

     610,000         573,784   

Tarrant County, TX, Cultural Education Facilities Finance Corp. Retirement Facility (Air Force Village), 6.125%, 2029

     550,000         519,849   

Tarrant County, TX, Cultural Education Facilities Finance Corp. Retirement Facility (Air Force Village), 6.375%, 2044

     415,000         383,041   

Tarrant County, TX, Cultural Education Facilities Finance Corp. Retirement Facility (Stayton at Museum Way), 8.25%, 2044

     770,000         738,715   

Travis County, TX, Health Facilities Development Corp. Rev. (Westminster Manor Health), 7%, 2030

     130,000         127,538   

Travis County, TX, Health Facilities Development Corp. Rev. (Westminster Manor Health), 7.125%, 2040

     195,000         191,318   

Westmoreland County, PA, Industrial Development Authority Rev. (Redstone Retirement Community), “A”, 5.875%, 2032

     600,000         487,728   

Westmoreland County, PA, Industrial Development Retirement Authority Rev. (Redstone Retirement Community), “A”, 5.75%, 2026

     1,250,000         1,065,025   

Wisconsin Health & Educational Facilities Authority Rev. (All Saints Assisted Living Project), 6%, 2037

     180,000         150,689   
           
      $ 27,679,598   
           

Healthcare Revenue - Other – 0.5%

     

Massachusetts Health & Educational Facilities Authority Rev. (Civic Investments, Inc.), “A”, 9%, 2012 (c)

   $ 550,000       $ 619,537   
           

Industrial Revenue - Airlines – 5.8%

     

Alliance Airport Authority, Inc., TX (American Airlines, Inc.), 5.25%, 2029

   $ 1,560,000       $ 1,076,384   

Chicago, IL, O’Hare International Airport Special Facilities Rev. (American Airlines, Inc.), 5.5%, 2030

     1,025,000         782,588   

Clayton County, GA, Development Authority Special Facilities Rev. (Delta Airlines, Inc.), “A”, 8.75%, 2029

     200,000         224,218   

Clayton County, GA, Development Authority Special Facilities Rev. (Delta Airlines, Inc.), “B”, 9%, 2035

     150,000         159,639   

Denver, CO, City & County Airport Rev. (United Airlines), 5.75%, 2032

     355,000         310,937   

Houston, TX, Airport Systems Rev., Special Facilities (Continental Airlines, Inc.), “E”, 7%, 2029

     200,000         199,564   

New Jersey Economic Development Authority, Special Facilities Rev. (Continental Airlines, Inc.), 6.25%, 2029

     935,000         873,795   

New Jersey Economic Development Authority, Special Facilities Rev. (Continental Airlines, Inc.), 9%, 2033

     1,250,000         1,295,813   

New York, NY, City Industrial Development Agencies Rev. (American Airlines, Inc.), 7.5%, 2016

     600,000         613,536   

New York, NY, City Industrial Development Agencies Rev. (American Airlines, Inc.), 7.625%, 2025

     155,000         156,595   

New York, NY, City Industrial Development Agencies Rev. (American Airlines, Inc.), 7.75%, 2031

     385,000         399,384   

 

6


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Industrial Revenue - Airlines – continued

     

New York, NY, City Industrial Development Agency Special Facility Rev. (American Airlines, Inc.), “B”, 8.5%, 2028

   $ 500,000       $ 514,870   
           
      $ 6,607,323   
           

Industrial Revenue - Chemicals – 1.5%

     

Brazos River, TX, Harbor Navigation District (Dow Chemical Co.), “B-2”, 4.95%, 2033

   $ 400,000       $ 368,116   

Michigan Strategic Fund Ltd. Obligation Rev. (Dow Chemical Co.), 6.25%, 2014

     655,000         707,452   

Port of Bay, TX, City Authority (Hoechst Celanese Corp.), 6.5%, 2026

     660,000         659,960   
           
      $ 1,735,528   
           

Industrial Revenue - Environmental Services – 1.1%

     

California Pollution Control Financing Authority, Solid Waste Disposal Rev. (Republic Services, Inc.), “B”, 5.25%, 2023 (b)

   $ 135,000       $ 135,826   

California Pollution Control Financing Authority, Solid Waste Disposal Rev. (Waste Management, Inc.), “C”, 5.125%, 2023

     655,000         657,338   

Carbon County, UT, Solid Waste Disposal Rev. (Laidlaw Environmental), “A”, 7.45%, 2017

     500,000         500,390   
           
      $ 1,293,554   
           

Industrial Revenue - Metals – 0.3%

     

State of Indiana Finance Authority, Environmental Rev. (U.S. Steel Corp.), 6%, 2026

   $ 390,000       $ 381,420   
           

Industrial Revenue - Other – 3.1%

     

Annawan, IL, Tax Increment Rev. (Patriot Renewable Fuels LLC), 5.625%, 2018

   $ 315,000       $ 259,721   

California Statewide Communities, Development Authority Facilities (Microgy Holdings Project), 9%, 2038 (d)

     53,546         3,079   

Gulf Coast, TX, Industrial Development Authority Rev. (CITGO Petroleum Corp.), 8%, 2028

     375,000         364,121   

Houston, TX, Industrial Development Corp. (United Parcel Service, Inc.), 6%, 2023

     435,000         406,094   

Indianapolis, IN, Airport Authority Rev., Special Facilities (FedEx Corp.), 5.1%, 2017

     500,000         529,020   

New Jersey Economic Development Authority Rev. (GMT Realty LLC), “B”, 6.875%, 2037

     1,000,000         844,550   

Virgin Islands Government Refinery Facilities Rev. (Hovensa Coker Project), 6.5%, 2021

     250,000         243,568   

Virgin Islands Public Finance Authority, Refinery Facilities Rev. (Hovensa Coker Project), 5.875%, 2022

     400,000         365,156   

Will-Kankakee, IL, Regional Development Authority Rev. (Flanders Corp.), 6.5%, 2017

     500,000         481,920   
           
      $ 3,497,229   
           

Industrial Revenue - Paper – 3.7%

     

Beauregard Parish, LA (Boise Cascade Corp.), 6.8%, 2027

   $ 1,000,000       $ 963,300   

Bedford County, VA, Industrial Development Authority Rev. (Nekooska Packaging Corp.), 5.6%, 2025

     400,000         370,784   

Brunswick & Glynn County, GA, Development Authority Rev. (Georgia-Pacific LLC), 5.55%, 2026

     465,000         426,414   

Courtland, AL, Industrial Development Board Solid Waste Disposal Rev. (Champion International Corp.), 6%, 2029

     1,000,000         959,110   

Escambia County, FL, Environmental Improvement Rev. (International Paper Co.), “A”, 5%, 2026

     980,000         861,626   

Escambia County, FL, Environmental Improvement Rev. (International Paper Co.), “A”, 4.75%, 2030

     290,000         246,573   

Phenix City, AL, Industrial Development Board Environmental Improvement Rev., “A” (Mead Westvaco Coated Board Project), 6.35%, 2035

     400,000         382,836   
           
      $ 4,210,643   
           

Miscellaneous Revenue - Entertainment & Tourism – 1.7%

     

Agua Caliente Band of Cahuilla Indians, CA, Rev., 5.6%, 2013 (n)

   $ 495,000       $ 505,885   

Brooklyn, NY, Arena Local Development Corp. (Barclays Center Project), 6%, 2030

     135,000         131,228   

Brooklyn, NY, Arena Local Development Corp. (Barclays Center Project), 6.25%, 2040

     85,000         82,983   

 

7


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Miscellaneous Revenue - Entertainment & Tourism – continued

     

Brooklyn, NY, Arena Local Development Corp. (Barclays Center Project), 6.375%, 2043

   $ 65,000       $ 64,074   

Cow Creek Band of Umpqua Tribe of Indians, OR, “C”, 5.625%, 2026 (n)

     650,000         502,782   

Mashantucket Western Pequot Tribe, CT, “B”, 0%, 2018 (a)(n)

     1,100,000         285,197   

New York Liberty Development Corp. Rev. (National Sports Museum), “A”, 6.125%, 2019 (d)

     351,999         4   

New York, NY, City Industrial Development Agency Rev. (Queens Baseball Stadium), ASSD GTY, 6.125%, 2029

     30,000         32,343   

New York, NY, City Industrial Development Agency Rev. (Queens Baseball Stadium), ASSD GTY, 6.375%, 2039

     25,000         26,390   

New York, NY, City Industrial Development Agency Rev. (Queens Baseball Stadium), ASSD GTY, 6.5%, 2046

     100,000         106,347   

Seminole Tribe, FL, Special Obligation Rev., “A”, 5.25%, 2027 (n)

     280,000         233,562   
           
      $ 1,970,795   
           

Miscellaneous Revenue - Other – 2.8%

     

Austin, TX, Convention Center (Convention Enterprises, Inc.), “A”, SYNCORA, 5.25%, 2024

   $ 305,000       $ 274,348   

Capital Trust Agency, FL (Aero Syracuse LLC), 6.75%, 2032

     350,000         316,054   

Dallas, TX, Civic Center Convention Complex Rev., ASSD GTY, 5.25%, 2034

     845,000         849,555   

New York Liberty Development Corp., Liberty Rev. (One Bryant Park LLC), 6.375%, 2049

     955,000         950,158   

Summit County, OH, Port Authority Building Rev. (Twinsburg Township), “D”, 5.125%, 2025

     630,000         519,265   

V Lakes Utility District, MS, Water Systems Rev., 7%, 2037

     300,000         254,010   
           
      $ 3,163,390   
           

Multi-Family Housing Revenue – 5.3%

     

Broward County, FL, Housing Finance Authority Rev. (Chaves Lakes Apartments Ltd.), “A”, 7.5%, 2040

   $ 500,000       $ 460,380   

Capital Trust Agency, FL, Housing Rev. (Atlantic Housing Foundation), “B”, 7%, 2032 (q)

     625,000         305,425   

Charter Mac Equity Issuer Trust, FHLMC, 6%, 2019 (n)

     1,000,000         1,029,790   

District of Columbia Housing Finance Agency (Henson Ridge), “E”, FHA, 5.1%, 2037

     655,000         615,320   

Durham, NC, Durham Housing Authority Rev. (Magnolia Pointe Apartments), 5.65%, 2038 (b)

     922,265         681,600   

El Paso County, TX, Housing Finance Corp. (American Housing Foundation), “C”, 8%, 2032

     275,000         256,666   

El Paso County, TX, Housing Finance Corp. (American Housing Foundation), “D”, 10%, 2032

     280,000         263,469   

Minneapolis, MN, Student Housing Rev. (Riverton Community Housing Project), “A”, 5.7%, 2040

     500,000         366,580   

Mississippi Home Corp., Rev. (Kirkwood Apartments), 6.8%, 2037 (q)

     605,000         357,077   

MuniMae TE Bond Subsidiary LLC, 5.8%, 2049 (z)

     1,000,000         650,220   

Resolution Trust Corp., Pass-Through Certificates, “1993”, 8.5%, 2016 (z)

     455,481         431,035   

Wilmington, DE, Multi-Family Housing Rev. (Electra Arms Senior Associates), 6.25%, 2028

     805,000         659,408   
           
      $ 6,076,970   
           

Sales & Excise Tax Revenue – 5.2%

     

Bolingbrook, IL, Sales Tax Rev., 6.25%, 2024

   $ 500,000       $ 305,280   

Massachusetts School Building Authority, Dedicated Sales Tax Rev., AMBAC, 4.75%, 2032

     840,000         841,369   

Metropolitan Pier & Exposition Authority, State Tax Rev., Capital Appreciation, NATL, 0%, 2015

     3,000,000         2,579,160   

Metropolitan Pier & Exposition Authority, State Tax Rev., Capital Appreciation, ETM, FGIC, 0%, 2014

     1,010,000         958,197   

 

8


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Sales & Excise Tax Revenue – continued

     

Puerto Rico Sales Tax Financing Corp., Sales Tax Rev., Capital Appreciation, “A”, 0%, 2032

   $ 460,000       $ 371,836   

Regional Transportation District, CO, Private Activity Rev. (Denver Transportation Partners), 6%, 2034

     630,000         585,642   

Regional Transportation District, CO, Private Activity Rev. (Denver Transportation Partners), 6%, 2041

     300,000         273,723   
           
      $ 5,915,207   
           

Single Family Housing - Local – 1.2%

     

Minneapolis & St. Paul Housing Authority Rev. (City Living), “A-2”, GNMA, 5%, 2038

   $ 499,694       $ 458,994   

Pittsburgh, PA, Urban Redevelopment Authority Rev., “C”, GNMA, 4.8%, 2028

     1,000,000         956,140   
           
      $ 1,415,134   
           

Single Family Housing - State – 2.4%

     

California Housing Finance Agency Rev., “G”, 5.5%, 2042

   $ 370,000       $ 369,782   

Colorado Housing & Finance Authority, “A”, 5.5%, 2029

     1,115,000         1,144,570   

Iowa Finance Authority, Single Family Mortgage Rev., “E”, 5.4%, 2032

     480,000         490,579   

Kentucky Counties Single Family Mortgage Rev., “A”, NATL, 9%, 2016

     5,000         4,999   

North Dakota Housing Finance Agency Rev., “A”, 4.85%, 2021

     215,000         214,123   

Virginia Housing Development Authority, Commonwealth Mortgage, “A-5”, 4.4%, 2015

     210,000         216,632   

Virginia Housing Development Authority, Commonwealth Mortgage, “A-5”, 4.4%, 2015

     340,000         352,036   
           
      $ 2,792,721   
           

Solid Waste Revenue – 0.1%

     

Pennsylvania Economic Development Financing Authority, Sewer Sludge Disposal Rev. (Philadelphia Biosolids Facility), 6.25%, 2032

   $ 75,000       $ 76,727   
           

State & Agency - Other – 0.5%

     

Commonwealth of Puerto Rico (Mepsi Campus), “A”, 6.25%, 2024

   $ 100,000       $ 95,337   

Commonwealth of Puerto Rico (Mepsi Campus), “A”, 6.5%, 2037

     500,000         453,855   
           
      $ 549,192   
           

State & Local Agencies – 4.9%

     

Dorchester County, SC, School District No. 2, Growth Remedy Opportunity Tax Hike, 5.25%, 2029

   $ 500,000       $ 513,100   

Guam Government Department of Education (John F. Kennedy High School), “A”, COP, 6.875%, 2040

     295,000         282,221   

Laurens County, SC, School District No. 55, Installment Purchase Rev., 5.25%, 2030

     700,000         680,659   

Michigan Building Authority Rev., Facilities Program, “I”, 5%, 2024 (c)

     45,000         46,268   

Michigan Building Authority Rev., Facilities Program, “I”, 5%, 2024

     955,000         956,729   

New York Metropolitan Transportation Authority, “A”, 5.125%, 2029

     800,000         803,152   

Newberry, SC, Investing in Children’s Education (Newberry County School District Program), 5%, 2030

     400,000         367,268   

Philadelphia, PA, Municipal Authority Rev., 6.5%, 2034

     135,000         137,449   

Puerto Rico Public Finance Corp., “E”, ETM, 6%, 2026

     820,000         995,603   

Puerto Rico Public Finance Corp., “E”, ETM, 6%, 2026 (c)

     80,000         96,112   

Wisconsin General Fund Annual Appropriation Rev., “A”, 5.75%, 2033

     660,000         697,316   
           
      $ 5,575,877   
           

Student Loan Revenue – 0.4%

     

Massachusetts Educational Financing Authority, Education Loan Rev., “H”, ASSD GTY, 6.35%, 2030

   $ 445,000       $ 449,432   

Massachusetts Educational Financing Authority, Education Loan Rev., “I-A”, 5.5%, 2022

     25,000         26,154   
           
      $ 475,586   
           

Tax - Other – 1.2%

     

Dallas County, TX, Flood Control District, 7.25%, 2032

   $ 750,000       $ 768,593   

 

9


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Tax - Other – continued

     

New York, NY, City Transitional Finance Authority Building Aid Rev., “S-3”, 5.25%, 2039

   $ 440,000       $ 440,251   

Virgin Islands Public Finance Authority Rev. (Diageo Project), “A”, 6.75%, 2037

     205,000         209,260   
           
      $ 1,418,104   
           

Tax Assessment – 9.0%

     

Anne Arundel County, MD, Special Obligation (National Business Park-North Project), 6.1%, 2040

   $ 140,000       $ 127,435   

Atlanta, GA, Tax Allocation (Eastside Project), “B”, 5.4%, 2020

     500,000         497,880   

Ave Maria Stewardship Community District, FL, “A”, 5.125%, 2038

     150,000         101,145   

Capital Region Community Development District, FL, Capital Improvement Rev., “A”, 7%, 2039

     235,000         214,922   

Celebration Community Development District, FL, “A”, 6.4%, 2034

     690,000         680,906   

Channing Park Community Development District, FL, 5.3%, 2038

     340,000         246,704   

Chicago, IL, Tax Increment Allocation (Pilsen Redevelopment), “B”, 6.75%, 2022

     310,000         306,311   

Du Page County, IL, Special Service Area No. 31 Special Tax (Monarch Landing Project), 5.625%, 2036

     250,000         194,643   

Heritage Harbour North Community Development District, FL, Capital Improvement Rev., 6.375%, 2038

     315,000         247,971   

Homestead, FL, Community Development District, Special Assessment, “A”, 6%, 2037

     365,000         222,416   

Homestead, FL, Community Development District, Special Assessment, “B”, 5.9%, 2013

     170,000         103,756   

Huntington Beach, CA, Community Facilities District, Special Tax (Grand Coast Resort), “2000-1”, 6.45%, 2031

     500,000         485,630   

Lincolnshire, IL, Special Service Area No. 1 (Sedgebrook Project), 6.25%, 2034

     250,000         214,303   

Magnolia Park Community Development District, FL, Special Assessment, “A”, 6.15%, 2039

     615,000         488,888   

Main Street Community Development District, FL, “A”, 6.8%, 2038

     285,000         224,264   

Main Street Community Development District, FL, “B”, 6.9%, 2017

     225,000         206,460   

Northwest Metropolitan District No. 3, CO, 6.25%, 2035

     500,000         370,650   

Oakmont Grove Community Development District, FL, “A”, 5.4%, 2038 (d)

     300,000         111,000   

Ohio County, WV, Commission Tax Increment Rev. (Fort Henry Centre), “A”, 5.85%, 2034

     125,000         112,825   

Orlando, FL, Special Assessment Rev. (Conroy Road Interchange Project), “A”, 5.8%, 2026

     300,000         279,639   

Plano, IL, Special Service Area No. 4 (Lakewood Springs Project Unit 5-B), 6%, 2035

     1,460,000         1,230,649   

San Diego, CA, Redevelopment Agency, Tax Allocation, AGM, 0%, 2018

     1,015,000         701,020   

Sarasota National Community Development District, FL, Special Assessment Rev., 5.3%, 2039 (d)

     800,000         156,000   

Sweetwater Creek Community Development District, FL, Capital Improvement Rev., 5.5%, 2038

     190,000         81,700   

Tolomato Community Development District, FL, Special Assessment, 6.65%, 2040

     585,000         404,323   

Tuscany Reserve Community Development District, FL, Special Assessment, “B”, 5.25%, 2016

     185,000         150,917   

Volo Village, IL, Special Service Area No. 3, Special Tax (Symphony Meadows Project), “1”, 6%, 2036

     483,000         338,390   

West Villages Improvement District, FL, Special Assessment Rev. (Unit of Development No. 3), 5.5%, 2037

     480,000         223,181   

Westchester, FL, Community Development District No. 1 (Community Infrastructure), 6.125%, 2035

     275,000         233,599   

Westridge, FL, Community Development District, Capital Improvement Rev., 5.8%, 2037 (d)

     960,000         364,800   

Wyandotte County-Kansas City, KS, Unified Government Transportation Development District (Legends Village West Project), 4.875%, 2028

     580,000         419,572   

Yorba Linda, CA, Redevelopment Agency, Tax Allocation Rev., “A”, NATL, 0%, 2024

     1,325,000         553,810   
           
      $ 10,295,709   
           

 

10


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Tobacco – 8.6%

     

Buckeye, OH, Tobacco Settlement Financing Authority, “A-2”, 5.125%, 2024

   $ 3,270,000       $ 2,442,592   

Buckeye, OH, Tobacco Settlement Financing Authority, “A-2”, 5.875%, 2030

     245,000         174,141   

Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., “A-1”, 6.25%, 2013 (c)(f)

     1,155,000         1,250,345   

Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., “A-1”, 5.75%, 2047

     525,000         351,787   

Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Asset Backed, “A-1”, 5%, 2033

     440,000         283,122   

Inland Empire, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Asset Backed, Capital Appreciation, “C-1”, 0%, 2036

     1,815,000         120,716   

New Jersey Tobacco Settlement Financing Corp., “1-A”, 4.75%, 2034

     260,000         158,582   

New Jersey Tobacco Settlement Financing Corp., “1-A”, 5%, 2041

     2,940,000         1,761,883   

Railsplitter Tobacco Settlement Authority, IL, 6%, 2028

     1,320,000         1,283,964   

Rhode Island Tobacco Settlement Authority, 6%, 2023

     1,530,000         1,553,639   

Washington Tobacco Settlement Authority Rev., 6.625%, 2032

     500,000         488,525   
           
      $ 9,869,296   
           

Toll Roads – 4.9%

     

E-470 Public Highway Authority, CO, Capital Appreciation, “B”, NATL, 0%, 2018

   $ 1,500,000       $ 953,355   

North Texas Tollway Authority Rev., 6%, 2038

     765,000         770,003   

Pennsylvania Turnpike Commission, Capital Appreciation, “C”, AGM, 0% to 2016, 6.25% to 2033

     1,440,000         1,107,130   

San Joaquin Hills, CA, Transportation Corridor Agency, Toll Road Rev., Capital Appreciation, “A”, NATL, 0%, 2015

     3,000,000         2,359,380   

Texas Private Activity Bond, Surface Transportation Corp., 7%, 2040

     400,000         405,132   
           
      $ 5,595,000   
           

Transportation - Special Tax – 0.2%

     

Mid-Bay Bridge Authority, FL, Springing Lien Rev., “A”, 7.25%, 2040

   $ 215,000       $ 214,981   
           

Universities - Colleges – 9.6%

     

Brevard County, FL, Industrial Development Rev. (TUFF Florida Tech LLC Project), 6.75%, 2039

   $ 540,000       $ 526,586   

California Educational Facilities Authority Rev. (University of Southern California), “A”, 5.25%, 2038

     1,270,000         1,281,798   

California Municipal Finance Authority Rev. (Biola University), 5.8%, 2028

     100,000         99,017   

Florida State University Board of Governors, System Improvement Rev., 6.25%, 2030

     1,000,000         1,115,350   

Grand Valley, MI, State University Rev., 5.5%, 2027

     135,000         139,685   

Grand Valley, MI, State University Rev., 5.625%, 2029

     65,000         66,871   

Harris County, TX, Cultural Education Facilities Rev. (Baylor College of Medicine), “D”, 5.625%, 2032

     540,000         491,152   

Illinois Finance Authority Rev. (Illinois Institute of Technology), “A”, 5%, 2036

     110,000         78,921   

Illinois Finance Authority Rev. (Roosevelt University Project), 6.25%, 2029

     670,000         651,602   

Illinois Finance Authority Rev. (Roosevelt University Project), 6.5%, 2039

     155,000         150,899   

Illinois Finance Authority Student Housing Rev. (Illinois State University), 6.75%, 2031

     240,000         239,460   

Massachusetts Health & Educational Facilities Authority Rev. (Simmons College), “I”, 8%, 2029

     255,000         281,885   

Massachusetts Health & Educational Facilities Authority Rev. (Suffolk University), “A”, 6.25%, 2030

     725,000         736,194   

Massachusetts Health & Educational Facilities Authority Rev. (Suffolk University), “A”, 5.75%, 2039

     455,000         436,563   

Ohio Higher Education Facilities Rev. (Ashland University Project), 6.25%, 2024

     660,000         646,767   

Savannah, GA, Economic Development Authority Rev. (AASU Student Union LLC), ASSD GTY, 5.125%, 2039

     1,320,000         1,282,472   

University of Illinois Rev. (Auxiliary Facilities Systems), “A”, 5.125%, 2029

     1,880,000         1,876,616   

University of Southern Indiana Rev. (Student Fee), “J”, ASSD GTY, 5.75%, 2028

     300,000         319,617   

 

11


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Universities - Colleges – continued

     

University of Southern Mississippi Educational Building Corp. Rev. (Campus Facilities Project), 5.25%, 2032

   $ 220,000       $ 225,914   

University of Southern Mississippi Educational Building Corp. Rev. (Campus Facilities Project), 5.375%, 2036

     80,000         81,390   

Washington Higher Education Facilities Authority Rev. (Whitworth University), 5.875%, 2034

     280,000         267,784   
           
      $ 10,996,543   
           

Universities - Dormitories – 0.7%

     

California Statewide Communities Development Authority Rev. (Lancer Educational Student Housing Project), 5.625%, 2033

   $ 735,000       $ 586,875   

Pennsylvania Higher Education Facilities Authority Rev. (Edinboro University Foundation), 5.8%, 2030

     80,000         76,677   

Pennsylvania Higher Education Facilities Authority Rev. (Edinboro University Foundation), 6%, 2043

     110,000         105,164   
           
      $ 768,716   
           

Universities - Secondary Schools – 0.8%

     

Clifton, TX, Higher Education Finance Corp. Rev. (Uplift Education), “A”, 6.125%, 2040

   $ 215,000       $ 188,675   

Clifton, TX, Higher Education Finance Corp. Rev. (Uplift Education), “A”, 6.25%, 2045

     135,000         119,158   

La Vernia, TX, Higher Education Finance Corp. Rev. (KIPP, Inc.), “A”, 6.25%, 2039

     195,000         192,186   

Lee County, FL, Industrial Development Authority Rev. (Lee Charter Foundation), “A”, 5.375%, 2037

     535,000         404,257   

Philadelphia, PA, Authority for Industrial Development Rev. (MaST Charter School), 6%, 2035

     50,000         47,484   
           
      $ 951,760   
           

Utilities - Cogeneration – 0.7%

     

Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Central Facilities (Cogeneration Facilities - AES Puerto Rico Project), 6.625%, 2026

   $ 320,000       $ 320,954   

Suffolk County, NY, Industrial Development Agency Rev. (Nissequoque Cogeneration Partners Facilities), 5.5%, 2023

     550,000         485,122   
           
      $ 806,076   
           

Utilities - Investor Owned – 5.8%

     

Brazos River Authority, TX, Pollution Control Rev. (TXU Electric Co. LLC), “C”, 5.75%, 2036 (b)

   $ 150,000       $ 139,850   

Brazos River Authority, TX, Pollution Control Rev. (TXU Electric Co. LLC), “C”, 6.75%, 2038

     555,000         188,750   

Bryant, IL, Pollution Control Rev. (Central Illinois Light Co.), 5.9%, 2023

     975,000         977,574   

Chula Vista, CA, Industrial Development Rev. (San Diego Gas), 5.875%, 2034

     245,000         253,462   

Farmington, NM, Pollution Control Rev. (Public Service New Mexico), “D”, 5.9%, 2040

     500,000         479,805   

Maricopa County, AZ, Pollution Control Corp., Pollution Control Rev. (Arizona Public Service Co.), “D”, 6%, 2029 (b)

     475,000         511,547   

Massachusetts Development Finance Agency, Solid Waste Disposal Rev. (Dominion Energy Brayton), 5.75%, 2042 (b)

     85,000         87,956   

Matagorda County, TX, Pollution Control Rev. (Central Power & Light Co.), “A”, 6.3%, 2029

     275,000         276,837   

Mississippi Business Finance Corp., Pollution Control Rev. (Systems Energy Resources Project), 5.875%, 2022

     1,500,000         1,463,610   

New Hampshire Business Finance Authority, Pollution Control Rev. (Public Service of New Hampshire), “B”, NATL, 4.75%, 2021

     250,000         245,638   

Owen County, KY, Waterworks System Rev. (American Water Co. Project), “A”, 6.25%, 2039

     205,000         207,210   

Pennsylvania Economic Development Financing Authority (Allegheny Energy Supply Co. LLC), 7%, 2039

     600,000         630,108   

Pima County, AZ, Industrial Development Authority Rev. (Tucson Electric Power Co.), 5.75%, 2029

     1,015,000         1,005,875   

 

12


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

Issuer

   Shares/Par      Value ($)  

Municipal Bonds – continued

     

Utilities - Investor Owned – continued

     

Sabine River Authority, TX, Pollution Control Rev. (TXU Electric Co. LLC), 5.75%, 2030 (b)

   $ 155,000       $ 146,449   
           
      $ 6,614,671   
           

Utilities - Municipal Owned – 0.1%

     

Harris County, TX, Cultural Education Facilities Financial Corp., Thermal Utilities Rev. (Teco Project), “A”, 5.25%, 2035

   $ 140,000       $ 140,473   
           

Utilities - Other – 3.8%

     

California M-S-R Energy Authority Gas Rev., “A”, 7%, 2034

   $ 155,000       $ 170,266   

California M-S-R Energy Authority Gas Rev., “A”, 6.5%, 2039

     335,000         346,068   

Georgia Main Street Natural Gas, Inc., Gas Project Rev., “A”, 5.5%, 2028

     335,000         310,686   

Georgia Main Street Natural Gas, Inc., Gas Project Rev., “B”, 5%, 2019

     325,000         321,399   

Indiana Bond Bank Special Program, Gas Rev., “A”, 5.25%, 2018

     230,000         242,829   

Public Authority for Colorado Energy Natural Gas Purchase Rev., 6.5%, 2038

     25,000         25,883   

Salt Verde Financial Corp., AZ, Senior Gas Rev., 5%, 2037

     705,000         591,389   

Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 2021

     1,710,000         1,674,911   

Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 2022

     270,000         263,855   

Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 2026

     165,000         156,397   

Tennessee Energy Acquisition Corp., Gas Rev., “C”, 5%, 2025

     240,000         227,340   
           
      $ 4,331,023   
           

Water & Sewer Utility Revenue – 3.1%

     

Atlanta, GA, Water & Wastewater Rev., “A”, 6%, 2022

   $ 370,000       $ 414,774   

Birmingham, AL, Waterworks Board Water Rev., “A”, ASSD GTY, 5.125%, 2034

     595,000         593,762   

Commonwealth of Puerto Rico Aqueduct & Sewer Authority Rev., “A”, 6%, 2038

     655,000         614,108   

Commonwealth of Puerto Rico Aqueduct & Sewer Authority Rev., “A”, 6%, 2044

     135,000         125,315   

Detroit, MI, Sewer Disposal System Rev., “B”, AGM, 7.5%, 2033

     515,000         603,307   

New York, NY, Municipal Water Finance Authority, Water & Sewer Systems Rev. “DD”, 4.75%, 2035

     790,000         754,861   

Surprise, AZ, Municipal Property Corp., 4.9%, 2032

     700,000         595,833   
           
      $ 3,701,960   
           

Total Municipal Bonds

      $ 180,481,756   
           

Money Market Funds (v) – 5.2%

     

MFS Institutional Money Market Portfolio, 0.2%, at Net Asset Value

     5,992,304       $ 5,992,304   
           

Total Investments

      $ 186,474,060   
           

Other Assets, Less Liabilities – 2.8%

        3,155,816   
           

Preferred Shares (Issued by the Fund) – (65.4)%

        (75,000,000
           

Net assets applicable to common shares – 100.0%

      $ 114,629,876   
           

 

(a) Non-income producing security.
(b) Mandatory tender date is earlier than stated maturity date.
(c) Refunded bond.
(d) Non-income producing security - in default.
(f) All or a portion of the security has been segregated as collateral for open futures contracts.
(n) Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was $2,557,216, representing 2.2% of net assets applicable to common shares.
(q) Interest received was less than stated coupon rate.
(v) Underlying affiliated fund that is available only to investment companies managed by MFS. The rate quoted is the annualized seven-day yield of the fund at period end.

 

13


MFS High Yield Municipal Trust

PORTFOLIO OF INVESTMENTS (unaudited) 2/28/11 - continued

 

(z) Restricted securities are not registered under the Securities Act of 1933 and are subject to legal restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are subsequently registered. Disposal of these securities may involve time-consuming negotiations and prompt sale at an acceptable price may be difficult. The fund holds the following restricted securities:

 

Restricted Securities

   Acquisition
Date
     Cost      Value  

MuniMae TE Bond Subsidiary LLC, 5.8%, 2049

     10/14/04       $ 1,000,000       $ 650,220   

Resolution Trust Corp., Pass-Through Certificates, “1993”, 8.5%, 2016

     10/17/01-1/14/02         455,481         431,035   
              

Total Restricted Securities

         $ 1,081,255   

% of Net Assets Applicable to Common Shares

           0.9

The following abbreviations are used in this report and are defined:

 

COP   Certificate of Participation
ETM   Escrowed to Maturity
LOC   Letter of Credit

 

Insurers

   
AGM   Assured Guaranty Municipal
AMBAC   AMBAC Indemnity Corp.
ASSD GTY   Assured Guaranty Insurance Co.
CHCLI   California Health Construction Loan Insurance
FGIC   Financial Guaranty Insurance Co.
FHA   Federal Housing Administration
FHLMC   Federal Home Loan Mortgage Corp.
GNMA   Government National Mortgage Assn.
NATL   National Public Finance Guarantee Corp.
PSF   Permanent School Fund
SYNCORA   Syncora Guarantee Inc.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

 

14


MFS High Yield Municipal Trust

Supplemental Information (Unaudited) 2/28/11

(1) Investment Valuations

Debt instruments and floating rate loans (other than short-term instruments), including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less generally are valued at amortized cost, which approximates market value. Futures contracts are generally valued at last posted settlement price as provided by a third-party pricing service on the market on which they are primarily traded. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation as provided by a third-party pricing service on the market on which such futures contracts are primarily traded. Open-end investment companies are generally valued at net asset value per share. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. Values obtained from third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, and other market data.

The Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments (including any fair valuation) to the adviser pursuant to valuation policies and procedures approved by the Board. If the adviser determines that reliable market quotations are not readily available, investments are valued at fair value as determined in good faith by the adviser in accordance with such procedures under the oversight of the Board of Trustees. Under the fund’s valuation policies and procedures, market quotations are not considered to be readily available for most types of debt instruments and floating rate loans and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services. In addition, investments may be valued at fair value if the adviser determines that an investment’s value has been materially effected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halting of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund’s assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes unobservable inputs, which may include the adviser’s own assumptions in determining the fair value of investments. Other financial instruments are derivative instruments not reflected in total investments, such as futures. The following is a summary of the levels used as of February 28, 2011 in valuing the fund’s assets or liabilities:

 

Investments at Value

   Level 1     Level 2      Level 3      Total  

Municipal Bonds

   $ —        $ 180,481,756       $ —         $ 180,481,756   

Mutual Funds

     5,992,304        —           —           5,992,304   
                                  

Total Investments

   $ 5,992,304      $ 180,481,756       $ —         $ 186,474,060   
                                  

Other Financial Instruments

                          

Futures

   $ (61,489   $ —         $ —         $ (61,489

For further information regarding security characteristics, see the Portfolio of Investments.

(2) Portfolio Securities

The cost and unrealized appreciation and depreciation in the value of the investments owned by the fund, as computed on a federal income tax basis, are as follows:

 

Aggregate cost

   $ 195,978,308   
        

Gross unrealized appreciation

   $ 6,106,712   

Gross unrealized depreciation

     (15,610,960
        

Net unrealized appreciation (depreciation)

   $ (9,504,248
        

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

 

15


MFS High Yield Municipal Trust

Supplemental Information (Unaudited) 2/28/11 - continued

(3) Derivative Contracts at 2/28/11

Futures Contracts Outstanding at 2/28/11

 

Description

   Currency      Contracts      Value      Expiration
Date
     Unrealized
Appreciation
(Depreciation)
 

Liability Derivatives

              

Interest Rate Futures

              

U.S. Treasury Note 10 yr (Short)

     USD         188       $ 22,380,813         June-2011       $ (49,127

U.S. Treasury Bond 30 yr (Short)

     USD         32         3,851,000         June-2011         (12,362
                    
               $ (61,489
                    

At February 28, 2011, the fund had sufficient cash and/or other liquid securities to cover any commitments under these derivative contracts.

(4) Transactions in Underlying Affiliated Funds-Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. For the purposes of this report, the fund assumes the following to be affiliated issuers:

 

Underlying Affiliated Funds

   Beginning
Shares/Par
Amount
     Acquisitions
Shares/Par
Amount
     Dispositions
Shares/Par
Amount
    Ending
Shares/Par
Amount
 

MFS Institutional Money Market Portfolio

     —           10,283,023         (4,290,719     5,992,304   

Underlying Affiliated Funds

   Realized
Gain
(Loss)
     Capital Gain
Distributions
     Dividend
Income
    Ending
Value
 

MFS Institutional Money Market Portfolio

   $ —         $ —         $ 2,110      $ 5,992,304   

 

16


ITEM 2. CONTROLS AND PROCEDURES.

 

(a) Based upon their evaluation of the effectiveness of the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the “Act”)) as conducted within 90 days of the filing date of this Form N-Q, the registrant’s principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

 

(b) There were no changes in the registrant’s internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

 

ITEM 3. EXHIBITS.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2): Attached hereto.


Notice

A copy of the Agreement and Declaration of Trust, as amended, of the Registrant is on file with the Secretary of State of The Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant: MFS HIGH YIELD MUNICIPAL TRUST

 

By (Signature and Title)*    MARIA F. DIORIODWYER
  Maria F. DiOrioDwyer, President

Date: April 15, 2011

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

 

By (Signature and Title)*    MARIA F. DIORIODWYER
 

Maria F. DiOrioDwyer, President

(Principal Executive Officer)

Date: April 15, 2011

 

By (Signature and Title)*    JOHN M. CORCORAN
 

John M. Corcoran, Treasurer

(Principal Financial Officer

and Accounting Officer)

Date: April 15, 2011

 

* Print name and title of each signing officer under his or her signature.