Quarterly Report

June 30, 2020

MFS^® Virginia
Municipal Bond Fund

Portfolio of Investments

6/30/20 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer		Shares/Par	Value ($)
Municipal Bonds – 100.3%
Airport Revenue – 3.3%
Chicago, IL, O'Hare International Airport Rev., Senior Lien, “B”, 5%, 1/01/2030	$	510,000	$584,593
Chicago, IL, O'Hare International Airport Rev., Third Lien, “A”, 5.625%, 1/01/2035 (Prerefunded 1/01/2021)		695,000	713,549
Chicago, IL, O'Hare International Airport Rev., Third Lien, Unrefunded Balance, “A”, 5.625%, 1/01/2035		160,000	163,258
Metropolitan Washington, DC, Airport Authority Refunding Rev., “A”, 5%, 10/01/2037		1,000,000	1,223,440
Metropolitan Washington, DC, Airport Authority Refunding Rev., “A”, 5%, 10/01/2038		1,000,000	1,220,150
Metropolitan Washington, DC, Airport Authority Rev., “B”, 5%, 10/01/2027		980,000	1,160,340
Metropolitan Washington, DC, Airport Authority Rev., “B”, 5%, 10/01/2028		1,000,000	1,179,580
Norfolk, VA, Airport Authority Rev., 5%, 7/01/2029		525,000	650,029
Norfolk, VA, Airport Authority Rev., AGM, 5%, 7/01/2023		2,000,000	2,080,620
Norfolk, VA, Airport Authority Rev., AGM, 5%, 7/01/2024		1,000,000	1,039,390
San Francisco, CA, City & County Airports Commission, International Airport Rev., “B”, 5%, 5/01/2046		1,160,000	1,320,439
			$11,335,388
General Obligations - General Purpose – 8.2%
Bridgeview, IL, Stadium and Redevelopment Projects, AAC, 5.14%, 12/01/2036	$	775,000	$742,318
Chesapeake, VA, “B”, 5%, 6/01/2023		1,930,000	2,013,627
Chesterfield County, VA, Public Improvement, “A”, 4%, 1/01/2036		1,570,000	1,838,768
Chicago, IL, General Obligation, “A”, 5.5%, 1/01/2033		400,000	429,732
Chicago, IL, General Obligation, “D”, 5.5%, 1/01/2040		65,000	69,003
Chicago, IL, General Obligation, “F”, 5.5%, 1/01/2042		475,000	502,821
Commonwealth of Puerto Rico, General Obligation, “A”, 8%, 7/01/2035 (a)(d)		3,605,000	2,163,000
Commonwealth of Puerto Rico, Public Improvement, “A-4”, AGM, 5%, 7/01/2031		240,000	241,018
Fairfax County, VA, Public Improvement, “A”, 5%, 10/01/2037		2,000,000	2,603,800
Loudoun County, VA, General Obligation Public Improvement, “A”, 5%, 12/01/2022		3,000,000	3,342,720
Lynchburg, VA, Public Improvement, 5%, 12/01/2023		1,000,000	1,019,470
Lynchburg, VA, Public Improvement, 5%, 6/01/2026		1,000,000	1,172,060
Newport News, VA, General Obligation Improvement, “A”, 4%, 2/01/2038		1,425,000	1,684,991
Norfolk, VA, General Obligation Capital Improvement, 5%, 8/01/2043		2,615,000	3,518,796
Portsmouth, VA, General Obligation Public Improvement, “A”, 5%, 2/01/2032 (Prerefunded 2/01/2023)		440,000	491,788
Portsmouth, VA, General Obligation Public Improvement, “A”, 5%, 2/01/2032		60,000	66,657
Puerto Rico Public Buildings Authority Rev., “M-2”, AAC, 10%, 7/01/2035		170,000	180,455
Puerto Rico Public Buildings Authority Rev., Guaranteed, “D”, AAC, 5.45%, 7/01/2030		380,000	380,297
Richmond, VA, Public Improvement, “A”, 5%, 3/01/2028 (Prerefunded 3/01/2023)		220,000	247,350
State of Illinois, 5.5%, 5/01/2039		270,000	303,807
State of Illinois, 5.75%, 5/01/2045		245,000	278,484
State of Illinois, “A”, 4%, 12/01/2033		130,000	128,466
Suffolk, VA, General Obligation, 5%, 12/01/2022		2,480,000	2,762,695
Virginia Beach, VA, Public Improvement, “B”, 5%, 4/01/2022		2,000,000	2,165,520
			$28,347,643
General Obligations - Schools – 0.0%
Berks County, PA, Reading School District, AGM, 5%, 3/01/2036	$	70,000	$84,201
Healthcare Revenue - Hospitals – 15.4%
Allegheny County, PA, Hospital Development Authority Rev. (Allegheny Health Network Obligated Group), “A”, 5%, 4/01/2047	$	1,260,000	$1,459,597
Arlington County, VA, Industrial Development Authority, Hospital Rev. (Virginia Hospital Center), 5%, 7/01/2037		2,800,000	3,548,412
Chattanooga, TN, Health, Educational & Housing Facility Board Rev. (CommonSpirit Health), “A-1”, 4%, 8/01/2044		20,000	21,552
Chattanooga, TN, Health, Educational & Housing Facility Board Rev. (CommonSpirit Health), “A-2”, 5%, 8/01/2044		30,000	35,216
Chattanooga, TN, Health, Educational & Housing Facility Board Rev. (CommonSpirit Health), “A-2”, 5%, 8/01/2049		15,000	17,490
Chesapeake, VA, Hospital Authority Facility Rev. (Chesapeake Regional Medical Center), 5%, 7/01/2033		2,000,000	2,464,660
Chesapeake, VA, Hospital Authority Facility Rev. (Chesapeake Regional Medical Center), 5%, 7/01/2034		1,475,000	1,812,657
Colorado Health Facilities Authority Rev. (CommonSpirit Health), “A-2”, 4%, 8/01/2044		175,000	188,582
Commonwealth of Virginia, University Health System General Rev., “A”, 4%, 7/01/2040		2,000,000	2,229,320
Doylestown, PA, Hospital Rev., “A”, 4%, 7/01/2045		45,000	47,153
Fairfax County, VA, Industrial Development Authority Health Care Rev. (Inova Health System Project), “A”, 5%, 5/15/2044		2,000,000	2,214,440
Fairfax County, VA, Industrial Development Authority Health Care Rev. (Inova Health System Project), “A”, 4%, 5/15/2048		4,000,000	4,482,160

1

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Healthcare Revenue - Hospitals – continued
Fredericksburg, VA, Economic Development Authority, Hospital Facilities Rev. (Mary Washington Healthcare Obligated Group), 5%, 6/15/2031	$	750,000	$835,012
Fredericksburg, VA, Economic Development Authority, Hospital Facilities Rev. (Mary Washington Healthcare Obligated Group), 5%, 6/15/2033		1,000,000	1,106,110
Hamilton County, OH, Hospital Facilities Improvement Refunding Rev. (Trihealth, Inc. Obligated Group Project), “A”, 5%, 8/15/2033		155,000	196,735
Hamilton County, OH, Hospital Facilities Improvement Refunding Rev. (Trihealth, Inc. Obligated Group Project), “A”, 5%, 8/15/2034		265,000	335,530
Hamilton County, OH, Hospital Facilities Improvement Refunding Rev. (Trihealth, Inc. Obligated Group Project), “A”, 5%, 8/15/2035		195,000	245,714
Henrico County, VA, Economic Development Authority Rev. (Bon Secours Health Systems, Inc.), “B-2”, AGM, 5.25%, 11/01/2042		1,705,000	1,733,150
Henrico County, VA, Industrial Development Authority Rev. (Bon Secours Health Systems, Inc.), NATL, 6.25%, 8/15/2020		410,000	412,874
Jefferson Parish, LA, Hospital Service District No. 2 Hospital Rev. (East Jefferson General Hospital), 6.25%, 7/01/2031		375,000	380,659
Jefferson Parish, LA, Hospital Service District No. 2 Hospital Rev. (East Jefferson General Hospital), 6.375%, 7/01/2041		395,000	400,621
Knox County, IN, Health Educational & Housing Facility Rev. (University Health System, Inc.), “A”, 5%, 9/01/2030		1,585,000	1,907,944
Lynchburg, VA, Economic Development Authority Rev. (Centra Health), “A”, 5%, 1/01/2047		3,000,000	3,405,570
Norfolk, VA, Economic Development Authority Health Care Facilities Rev. (Sentara Healthcare), “B”, 5%, 11/01/2036		2,875,000	3,085,134
Norfolk, VA, Economic Development Authority Hospital Facilities Refunding Rev. (Sentara Healthcare), “B”, 4%, 11/01/2048		3,000,000	3,378,870
Roanoke, VA, Economic Development Authority, Hospital Rev. (Carilion Medical Center), “A”, 5%, 7/01/2047		1,625,000	2,495,122
Virginia Small Business Financing Authority Health Facilities Rev. (Bon Secours Mercy Health, Inc.), “A”, 4%, 12/01/2049		3,445,000	3,840,968
Virginia Small Business Financing Authority Rev. (Sentara Healthcare), 4%, 11/01/2039		3,750,000	4,219,012
Virginia Small Business Financing Authority Rev. (Sentara Healthcare), 3%, 11/01/2040		3,370,000	3,482,322
Winchester, VA, Economic Development Authority Hospital Rev. (Valley Health System Obligated Group), 5%, 1/01/2028		600,000	711,678
Winchester, VA, Economic Development Authority Hospital Rev. (Valley Health System Obligated Group), 5%, 1/01/2030		400,000	471,664
Winchester, VA, Economic Development Authority Hospital Rev. (Valley Health System Obligated Group), “A”, 5%, 1/01/2044		2,000,000	2,187,060
			$53,352,988
Healthcare Revenue - Long Term Care – 2.9%
Albemarle County, VA, Economic Development Authority, Residential Care Facilities Rev. (Westminster-Canterbury Blue Ridge), “A”, 5%, 1/01/2042	$	1,000,000	$1,002,790
Alexandria, VA, Industrial Development Authority, Residential Care Facilities Mortgage Rev. (Goodwin House, Inc.), 5%, 10/01/2030		1,000,000	1,067,330
Fairfax County, VA, Economic Development Authority Residential Care Facilities Rev. (Goodwin House, Inc.), 5%, 10/01/2036		1,000,000	1,055,870
Henrico County, VA, Economic Development Authority Rev., Residential Care Facility (Lifespire of Virginia.), “C”, 5%, 12/01/2037		765,000	758,819
Henrico County, VA, Economic Development Authority Rev., Residential Care Facility (Virginia United Methodist Homes, Inc.), 5%, 6/01/2024		395,000	398,207
Henrico County, VA, Economic Development Authority Rev., Residential Care Facility (Virginia United Methodist Homes, Inc.), 5%, 6/01/2025		385,000	387,914
James City County, VA, Economic Development Authority, Residential Care Facilities Rev. (Virginia United Methodist Homes of Williamsburg), “A”, 2%, 10/01/2048		200,800	17,570
Lexington, VA, Industrial Development Authority Residential Care Facilities Rev. (Kendal at Lexington), 4%, 1/01/2037		1,000,000	890,620
Lexington, VA, Industrial Development Authority Residential Care Facilities Rev. (Kendal at Lexington), “A”, 5%, 1/01/2042		1,000,000	1,008,120
Prince William County, VA, Industrial Development Authority, Residential Care Facilities Rev. (Westminster at Lake Ridge), 5%, 1/01/2037		1,000,000	1,035,300
Suffolk, VA, Economic Development Facilities First Mortgage Rev. (Lake Prince Center, Inc.), 5%, 9/01/2031		1,000,000	1,014,760
Travis County, TX, Health Facilities Development Corp. Rev. (Westminster Manor Health), 7%, 11/01/2030 (Prerefunded 11/01/2020)		140,000	143,024
Travis County, TX, Health Facilities Development Corp. Rev. (Westminster Manor Health), 7.125%, 11/01/2040 (Prerefunded 11/01/2020)		265,000	270,833
Travis County, TX, Health Facilities Development Corp. Rev. (Westminster Manor Health), Unrefunded Balance, 7%, 11/01/2030		5,000	5,065
Virginia Small Business Financing Authority, Residential Care Facility Rev. (Pinnacle Living), “C”, 5%, 6/01/2042		1,000,000	993,370
			$10,049,592
Industrial Revenue - Environmental Services – 0.3%
Virginia Small Business Financing Authority Rev., Solid Waste Disposal (Covanta Project), 5%, 1/01/2048 (Put Date 7/01/2038)	$	1,000,000	$1,021,180

2

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Industrial Revenue - Other – 1.2%
New York Liberty Development Corp. Rev. (Goldman Sachs Headquarters), 5.25%, 10/01/2035	$	1,520,000	$2,050,297
Port Beaumont, TX, Navigation District Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 3.625%, 1/01/2035 (n)		300,000	292,227
Port Beaumont, TX, Navigation District Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 4%, 1/01/2050 (n)		590,000	562,471
Tuscaloosa County, AL, Industrial Development Authority, Gulf Opportunity Zone (Hunt Refining Project), “A”, 4.5%, 5/01/2032		465,000	499,675
Tuscaloosa County, AL, Industrial Development Authority, Gulf Opportunity Zone (Hunt Refining Project), “A”, 5.25%, 5/01/2044		635,000	693,033
			$4,097,703
Industrial Revenue - Paper – 0.1%
Valparaiso, IN, Exempt Facilities Rev. (Pratt Paper LLC Project), 6.75%, 1/01/2034	$	100,000	$107,527
Valparaiso, IN, Exempt Facilities Rev. (Pratt Paper LLC Project), 7%, 1/01/2044		130,000	138,977
West Point, VA, Industrial Development Authority, Solid Waste Disposal Rev. (Chesapeake Corp.), “A”, 6.375%, 3/01/2019 (a)(d)		1,683,272	168
			$246,672
Miscellaneous Revenue - Other – 1.7%
Loudon County, VA, Economic Development Authority Rev. (Howard Hughes Medical Institute), Capital Appreciation, “A”, 0%, 7/01/2049	$	7,500,000	$3,072,000
Rappahannock, VA, Regional Jail Authority Rev., 5%, 10/01/2033		2,220,000	2,619,889
Summit County, OH, Port Authority Building Rev. (Flats East Development Recovery Zone Facility Bonds), 6.875%, 5/15/2040		75,000	76,066
			$5,767,955
Multi-Family Housing Revenue – 2.7%
Virginia Housing Development Authority Rev., Rental Housing, “A”, 3.8%, 9/01/2044	$	2,000,000	$2,198,080
Virginia Housing Development Authority Rev., Rental Housing, “D”, 3.7%, 10/01/2038		3,000,000	3,303,900
Virginia Housing Development Authority Rev., Rental Housing, “F”, 5.1%, 1/01/2041		3,770,000	3,778,068
			$9,280,048
Parking – 1.0%
Fairfax County, VA, Economic Development Authority Metrorail Parking System Project Rev., 5%, 4/01/2035	$	1,250,000	$1,514,750
Fairfax County, VA, Economic Development Authority Metrorail Parking System Project Rev., 5%, 4/01/2036		1,000,000	1,207,750
Fairfax County, VA, Economic Development Authority Metrorail Parking System Project Rev., 5%, 4/01/2037		750,000	905,992
			$3,628,492
Port Revenue – 1.6%
Virginia Port Authority Facilities Refunding Rev., “B”, 5%, 7/01/2027	$	1,500,000	$1,827,045
Virginia Port Authority Facilities Rev, “A”, 5%, 7/01/2031 (Prerefunded 7/01/2025)		3,000,000	3,639,000
			$5,466,045
Sales & Excise Tax Revenue – 2.5%
Colorado Regional Transportation District, Private Activity Rev. (Denver Transportation Partners), 6%, 1/15/2041	$	1,320,000	$1,322,218
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.55%, 7/01/2040		77,000	78,501
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 5%, 7/01/2058		2,435,000	2,545,914
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		717,000	720,320
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		251,000	252,162
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.536%, 7/01/2053		6,000	6,080
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.784%, 7/01/2058		122,000	125,788
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2024		13,000	11,713
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2027		135,000	111,112
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2029		26,000	19,848
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2031		1,212,000	853,309
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2033		1,160,000	749,859
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2046		7,149,000	2,016,375
			$8,813,199
Secondary Schools – 0.1%
District of Columbia Rev. (Rocketship D.C.), “A”, 5%, 6/01/2056	$	325,000	$329,917

3

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Single Family Housing - State – 1.9%
Maryland Community Development Administration, Department of Housing & Community Development Housing Rev., “A”, 4.25%, 9/01/2049	$	1,620,000	$1,796,726
Pennsylvania Housing Finance Agency, Single Family Mortgage Rev., “125A”, 3.7%, 10/01/2037		1,780,000	1,959,192
Tennessee Housing Development Agency Residential Finance Program, “1”, 4.25%, 1/01/2050		1,590,000	1,761,974
Texas Department of Housing & Community Affairs Residential Mortgage Rev., “A”, FNMA, 4.75%, 1/01/2049		980,000	1,102,951
			$6,620,843
State & Local Agencies – 11.8%
Campbell County, VA, Industrial Development Authority, 4%, 6/01/2039 (w)	$	1,000,000	$1,176,690
Campbell County, VA, Industrial Development Authority, 4%, 6/01/2040 (w)		1,000,000	1,173,400
Colorado State University Board of Governors, System Enterprise Refunding Rev., “E”, 4%, 3/01/2043		1,555,000	1,766,698
Delaware Valley, PA, Regional Finance Authority, “C”, FLR, 0.984% (LIBOR - 3mo. + 0.75%), 6/01/2037		1,955,000	1,724,115
Fairfax County, VA, Economic Development Authority Facilities Rev. (County Facilities Projects), “A”, 5%, 10/01/2033		500,000	588,405
Fairfax County, VA, Economic Development Authority Facilities Rev. (County Facilities Projects), “A”, 5%, 10/01/2034		1,000,000	1,174,980
Fairfax County, VA, Redevelopment and Housing Authority Refunding Rev. (Wedgewood Affordable Housing Acquisition), 5%, 10/01/2039		3,265,000	4,067,341
Henry County, VA, Industrial Development Authority, Public Facility Leave Rev., 4%, 11/01/2045		3,000,000	3,374,070
Loudoun County, VA, Economic Development Authority Rev. (Louduon County Public Facilities Project), “A”, 3%, 12/01/2037		2,000,000	2,183,640
Manassas Park, VA, Economic Development Authority Lease Rev., “A”, 6%, 7/15/2035 (Prerefunded 7/15/2020)		1,000,000	1,002,030
Maryland Stadium Authority Rev., Baltimore City Public Schools Construction and Revitalization Program, “A”, 5%, 5/01/2047		1,165,000	1,378,323
New Jersey Economic Development Authority Rev., School Facilities Construction, “AAA”, 5%, 6/15/2026		340,000	383,931
New River Valley, VA, Regional Jail Authority Rev., 5%, 10/01/2036		3,205,000	3,907,985
Virginia College Building Authority, Educational Facilities Rev. (21st Century College and Equipment Programs), “E-1”, 5%, 2/01/2023		2,140,000	2,397,378
Virginia College Building Authority, Educational Facilities Rev. (Public Higher Education Financing), “A”, 5%, 9/01/2027		3,000,000	3,161,070
Virginia Public Building Authority, Facilities Rev., “A”, 4%, 8/01/2039		4,500,000	5,367,060
Virginia Public Building Authority, Public Facilities Rev., “B-3”, 4%, 8/01/2021		1,000,000	1,040,770
Virginia Public School Authority (1997 Resolution), “A”, 5%, 8/01/2030 (Prerefunded 8/01/2020)		1,000,000	1,003,860
Virginia Resources Authority, Infrastructure Rev. (Virginia Pooled Financing Program), “C”, 4%, 11/01/2036		3,450,000	4,110,157
			$40,981,903
Student Loan Revenue – 0.1%
Iowa Student Loan Liquidity Corp. Rev., “B”, 3%, 12/01/2039	$	150,000	$146,279
Iowa Student Loan Liquidity Corp. Rev., “B”, 3.5%, 12/01/2044		385,000	364,695
			$510,974
Tax - Other – 1.3%
Puerto Rico Convention Center District Authority, Hotel Occupancy Tax Rev., “A”, AAC, 5%, 7/01/2031	$	375,000	$375,105
Puerto Rico Infrastructure Financing Authority Special Tax Rev., “C”, AAC, 5.5%, 7/01/2024		700,000	757,456
Puerto Rico Infrastructure Financing Authority Special Tax Rev., “C”, AAC, 5.5%, 7/01/2025		85,000	92,529
Puerto Rico Infrastructure Financing Authority Special Tax Rev., “C”, AAC, 5.5%, 7/01/2026		2,030,000	2,214,872
Puerto Rico Infrastructure Financing Authority Special Tax Rev., “C”, AAC, 5.5%, 7/01/2027		990,000	1,080,872
			$4,520,834
Tax Assessment – 0.7%
Embrey Mill Community Development Authority, VA, Special Assessment Rev., 7.25%, 3/01/2043	$	745,000	$773,459
Peninsula Town Center Community Development Authority, VA, Special Obligation Refunding, 5%, 9/01/2045		1,000,000	1,021,610
Prince William County, VA, Cherry Hill Community Development Authority Rev. (Potomac Shores Project), 5.15%, 3/01/2035		500,000	502,845
			$2,297,914
Tobacco – 1.4%
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020A-2, “1”, 5%, 6/01/2036	$	225,000	$286,416
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020A-2, “1”, 4%, 6/01/2048		395,000	426,888
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020B-2, “2”, 5%, 6/01/2055		1,850,000	1,948,032
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020B-3, Capital Appreciation, “2”, 0%, 6/01/2057		4,495,000	623,996
Illinois Railsplitter Tobacco Settlement Authority Rev., 6%, 6/01/2028 (Prerefunded 6/01/2021)		1,575,000	1,656,569
			$4,941,901

4

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Toll Roads – 5.4%
Chesapeake Bay Bridge & Tunnel District First Tier General Resolution Rev., 5%, 7/01/2051	$	3,000,000	$3,241,170
Metropolitan Washington D.C. Airports Authority, Toll Road Subordinate Lien Refunding Rev. (Dulles Metrorail and Capital Improvement Project), “B”, 4%, 10/01/2044		3,000,000	3,248,070
Metropolitan Washington D.C. Airports Authority, Toll Road Subordinate Lien Refunding Rev. (Dulles Metrorail and Capital Improvement Project), “B”, AGM, 4%, 10/01/2053		2,830,000	3,044,005
Metropolitan Washington, DC, Airports Authority Rev. Senior Lien (Dulles Toll Road), 5%, 10/01/2053		2,000,000	2,076,000
Texas Private Activity Surface Transportation Corp., Senior Lien Rev. (LBJ Infrastructure Group IH-635 Managed Lanes Project), 7%, 6/30/2040		435,000	437,392
Virginia Small Business Financing Authority Rev. (95 Express Lanes LLC Project), 5%, 7/01/2034		2,500,000	2,572,675
Virginia Small Business Financing Authority Rev. (Elizabeth River Crossings Opco LLC Project), 6%, 1/01/2037		465,000	493,458
Virginia Small Business Financing Authority Rev. (Elizabeth River Crossings Opco LLC Project), 5.5%, 1/01/2042		905,000	947,426
Virginia Small Business Financing Authority Senior Lien Rev. (95 Express Lanes LLC Project), 5%, 1/01/2044		1,500,000	1,541,385
Virginia Small Business Financing Authority, Senior Lien Private Activity Rev. (Transform 66 P3 Project), 5%, 12/31/2049		1,000,000	1,106,720
			$18,708,301
Transportation - Special Tax – 8.4%
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “J”, NATL, 5%, 7/01/2029	$	50,000	$50,202
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “L”, AAC, 5.25%, 7/01/2038		1,840,000	1,908,871
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “L”, ASSD GTY, 5.25%, 7/01/2041		1,120,000	1,213,464
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “L”, NATL, 5.25%, 7/01/2035		1,995,000	2,034,222
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “N”, AAC, 5.5%, 7/01/2029		1,715,000	1,869,830
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “N”, NATL, 5.25%, 7/01/2032		685,000	698,844
Commonwealth of Puerto Rico Highway & Transportation Authority Rev., “N”, NATL, 5.25%, 7/01/2033		570,000	581,725
Commonwealth of Virginia, Transportation Board Rev., Capital Projects, 4%, 5/15/2042		3,000,000	3,412,620
Commonwealth of Virginia, Transportation Board Rev., Capital Projects, “A”, 4%, 5/15/2035		2,750,000	3,212,275
Metropolitan Transportation Authority Refunding Rev., NY (Climate Bond Certified), “C-1”, 4.75%, 11/15/2045		445,000	493,420
Metropolitan Transportation Authority Refunding Rev., NY (Climate Bond Certified), “C-1”, 5%, 11/15/2050		530,000	601,046
Metropolitan Transportation Authority Rev., NY, Anticipation Note, “B-2”, 5%, 5/15/2021		1,220,000	1,245,498
Metropolitan Transportation Authority Rev., NY, Anticipation Note, “D-1”, 5%, 9/01/2022		850,000	893,180
New Jersey Transportation Trust Fund Authority, Transportation System, “A”, 5.25%, 12/15/2021		185,000	192,859
New Jersey Transportation Trust Fund Authority, Transportation System, “A”, 5%, 12/15/2039		190,000	211,462
New Jersey Transportation Trust Fund Authority, Transportation System, “BB”, 5%, 6/15/2044		190,000	207,775
Virginia Port Authority Rev., 5%, 7/01/2030		1,000,000	1,198,120
Virginia Port Authority Rev., 5%, 7/01/2031		500,000	598,520
Washington, DC, Metropolitan Area Transit Authority Gross Rev., 5%, 7/01/2037		1,560,000	1,887,725
Washington, DC, Metropolitan Area Transit Authority Gross Rev., 5%, 7/01/2038		1,560,000	1,883,201
Washington, DC, Metropolitan Area Transit Authority Gross Rev., “B”, 5%, 7/01/2042		3,860,000	4,623,392
			$29,018,251
Universities - Colleges – 12.0%
Amherst, VA, Industrial Development Authority Rev. (Educational Facilities Sweet Briar), 5%, 9/01/2026	$	1,585,000	$1,560,971
Commonwealth of Virginia, University General Pledge Refunding Rev., “A”, 4%, 11/01/2037		745,000	869,668
Commonwealth of Virginia, University General Pledge Refunding Rev., “A”, 4%, 5/01/2048		2,475,000	2,829,643
Lexington, VA, Industrial Development Authority Educational Facilities Rev. (Washington and Lee Universities), “A”, 5%, 1/01/2043		1,000,000	1,238,120
Montgomery County, VA, Economic Development Authority Rev., Tax-Exempt (Virginia Tech Foundation), “A”, 4%, 6/01/2037		1,000,000	1,186,900
Montgomery County, VA, Economic Development Authority Rev., Tax-Exempt (Virginia Tech Foundation), “A”, 4%, 6/01/2038		1,750,000	2,070,722
Prince William County, VA, Industrial Development Authority Rev. (George Mason University Foundation Prince William Life Sciences Lab), 5.5%, 9/01/2034 (Prerefunded 9/01/2021)		1,000,000	1,059,640
Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Control Facilities Financing Authority, Educational Facilities Rev. (University Plaza Project), NATL, 5%, 7/01/2033		445,000	446,179
Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Control Facilities Financing Authority, Higher Education Rev. (Ana G. Mendez University System Project), 5.375%, 4/01/2042		230,000	225,777
Red River, TX, Education Finance Corp., Higher Education Rev. (Houston Baptist University Project), 5.5%, 10/01/2046		595,000	647,146
Roanoke, VA, Economic Development Authority, Educational Facilities Rev. (Lynchburg College), “A”, 5%, 9/01/2034		1,000,000	1,116,700
Salem, VA, Economic Development Authority, Educational Facilities (Roanoke College), 4%, 4/01/2038		250,000	256,043
Salem, VA, Economic Development Authority, Educational Facilities (Roanoke College), 4%, 4/01/2039		225,000	229,381
Salem, VA, Economic Development Authority, Educational Facilities (Roanoke College), 4%, 4/01/2040		250,000	254,373
Salem, VA, Economic Development Authority, Educational Facilities (Roanoke College), 5%, 4/01/2049		900,000	989,478

5

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Universities - Colleges – continued
University of Virginia, General Rev. Pledge Refunding, 5%, 9/01/2025	$	3,760,000	$3,966,988
University of Virginia, General Rev. Pledge Refunding, “A”, 5%, 6/01/2043		685,000	777,907
University of Virginia, General Rev. Pledge Refunding, “B”, 5%, 4/01/2046		2,500,000	3,048,875
University of Virginia, Rector and Visitors General Pledge Rev. (Multi-Year Capital Project), “A”, 4%, 8/01/2048		2,000,000	2,302,040
Virginia College Building Authority, Educational Facilities Rev. (Marymount University Project), “A”, 5%, 7/01/2035		1,000,000	1,011,000
Virginia College Building Authority, Educational Facilities Rev. (Marymount University Project), “B”, 5.25%, 7/01/2035		1,000,000	1,022,010
Virginia College Building Authority, Educational Facilities Rev. (Randolph-Macon College), 4%, 1/15/2041		1,600,000	1,750,816
Virginia College Building Authority, Educational Facilities Rev. (Richmond University), “A”, 5%, 3/01/2021		2,115,000	2,182,024
Virginia College Building Authority, Educational Facilities Rev. (Washington & Lee University), NATL, 5.25%, 1/01/2031		1,000,000	1,330,420
Virginia College Building Authority, Educational Facilities Rev. (Washington & Lee University), “A”, 5%, 1/01/2040		1,000,000	1,134,640
Virginia Commonwealth University, General Rev., “A”, 5%, 11/01/2033		4,000,000	5,317,560
Virginia Small Business Financing Authority Rev. (Hampton University), 5.25%, 10/01/2029		2,500,000	2,952,000
			$41,777,021
Utilities - Cogeneration – 0.2%
Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Control Facilities Financing Authority Rev. (Cogeneration Facilities - AES Puerto Rico Project), 9.12%, 6/01/2022	$	795,000	$814,875
Utilities - Municipal Owned – 3.8%
Guam Power Authority Rev., “A”, 5.5%, 10/01/2030 (Prerefunded 10/01/2020)	$	785,000	$795,079
Guam Power Authority Rev., “A”, 5.5%, 10/01/2040 (Prerefunded 10/01/2020)		1,250,000	1,266,050
Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2029 (a)(d)		835,000	580,325
Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2042 (a)(d)		130,000	90,350
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2021 (a)(d)		60,000	41,850
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2030 (a)(d)		30,000	20,925
Puerto Rico Electric Power Authority Rev., “CCC”, 5.25%, 7/01/2027 (a)(d)		305,000	212,738
Puerto Rico Electric Power Authority Rev., “DDD”, 5%, 7/01/2021 (a)(d)		320,000	222,400
Puerto Rico Electric Power Authority Rev., “DDD”, 5%, 7/01/2021 (a)(d)		30,000	20,850
Puerto Rico Electric Power Authority Rev., “DDD”, 5%, 7/01/2022 (a)(d)		535,000	371,825
Puerto Rico Electric Power Authority Rev., “DDD”, AGM, 3.625%, 7/01/2023		60,000	60,026
Puerto Rico Electric Power Authority Rev., “DDD”, AGM, 3.65%, 7/01/2024		315,000	315,079
Puerto Rico Electric Power Authority Rev., “EEE”, 6.05%, 7/01/2032 (a)(d)		175,000	121,406
Puerto Rico Electric Power Authority Rev., “MM”, NATL, 5%, 7/01/2021		5,000	5,000
Puerto Rico Electric Power Authority Rev., “PP”, NATL, 5%, 7/01/2024		25,000	25,202
Puerto Rico Electric Power Authority Rev., “SS”, ASSD GTY, 4.375%, 7/01/2030		30,000	30,005
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2021 (a)(d)		145,000	100,775
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2023 (a)(d)		140,000	97,300
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2027 (a)(d)		25,000	17,375
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2037 (a)(d)		430,000	298,850
Puerto Rico Electric Power Authority Rev., “UU”, ASSD GTY, 4.25%, 7/01/2027		185,000	185,063
Puerto Rico Electric Power Authority Rev., “VV”, NATL, 5.25%, 7/01/2030		340,000	347,432
Puerto Rico Electric Power Authority Rev., “VV”, NATL, 5.25%, 7/01/2032		30,000	30,606
Puerto Rico Electric Power Authority Rev., “VV”, NATL, 5.25%, 7/01/2034		35,000	35,729
Puerto Rico Electric Power Authority Rev., “WW”, 5.375%, 7/01/2022 (a)(d)		25,000	17,469
Puerto Rico Electric Power Authority Rev., “WW”, 5.25%, 7/01/2025 (a)(d)		60,000	41,850
Puerto Rico Electric Power Authority Rev., “ZZ”, 5%, 7/01/2022 (a)(d)		205,000	141,963
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2023 (a)(d)		225,000	156,656
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2024 (a)(d)		70,000	48,825
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2026 (a)(d)		215,000	149,963
Richmond, VA, Public Utility Rev., “A”, 5%, 1/15/2027		2,555,000	2,857,461
Richmond, VA, Public Utility Rev., “A”, 5%, 1/15/2035		2,000,000	2,451,420
Richmond, VA, Public Utility Rev., “A”, 5%, 1/15/2038		2,000,000	2,236,760
			$13,394,607
Utilities - Other – 0.6%
Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 9/01/2021	$	555,000	$578,044
Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 9/01/2022		290,000	312,098
Tennessee Energy Acquisition Corp., Gas Rev., “A”, 5.25%, 9/01/2026		1,140,000	1,346,397
			$2,236,539

6

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Water & Sewer Utility Revenue – 11.7%
Commonwealth of Puerto Rico Aqueduct & Sewer Authority Rev., “A”, ASSD GTY, 5%, 7/01/2028	$	105,000	$105,697
Commonwealth of Puerto Rico Aqueduct & Sewer Authority Rev., “A”, ASSD GTY, 5.125%, 7/01/2047		265,000	265,048
Fairfax County, VA, Water Authority Rev., 5%, 4/01/2028		1,000,000	1,082,390
Fairfax County, VA, Water Authority Rev., 5%, 4/01/2041		3,000,000	3,703,320
Guam Waterworks Authority Rev. (Water and Wastewater System), 5.25%, 7/01/2020		60,000	60,000
Guam Waterworks Authority Rev. (Water and Wastewater System), 5.25%, 7/01/2021		175,000	181,809
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2036		295,000	341,280
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2037		375,000	432,705
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2040		1,045,000	1,197,915
Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 1/01/2050		430,000	513,080
Hampton Roads, VA, Sanitation District Wastewater Rev., “A”, 5%, 10/01/2035		660,000	866,191
Hampton Roads, VA, Sanitation District Wastewater Rev., “A”, 4%, 10/01/2037		1,350,000	1,560,654
Hampton Roads, VA, Sanitation District Wastewater Rev., “A”, 4%, 10/01/2038		1,265,000	1,458,760
Henrico County, VA, Water and Sewer System Rev. , 4%, 5/01/2046		1,435,000	1,652,130
Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Sewage Disposal System Rev. Refunding Second Lien Local Project), “C-7”, NATL, 5%, 7/01/2032		80,000	91,974
Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Water Supply System Rev. Refunding Second Lien Local Project), “D-6”, NATL, 5%, 7/01/2036		100,000	113,541
Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Water Supply System Rev. Refunding Senior Lien Local Project), “D-1”, AGM, 5%, 7/01/2035		50,000	56,274
Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Water Supply System Rev. Refunding Senior Lien Local Project), “D-1”, AGM, 5%, 7/01/2037		110,000	123,303
Norfolk, VA, Water Rev., 5%, 11/01/2028 (Prerefunded 5/01/2022)		985,000	1,069,828
Norfolk, VA, Water Rev., 5%, 11/01/2028		15,000	16,228
Upper Occoquan, VA, Sewage Authority Regional Sewage Rev., 3%, 7/01/2044		2,065,000	2,212,400
Virginia Beach, VA, Water & Sewer System Rev., 5%, 10/01/2022		1,310,000	1,449,253
Virginia Resources Authority, Infrastructure Rev. (St. Moral, VA), 5%, 11/01/2040 (Prerefunded 11/01/2020)		1,240,000	1,259,654
Virginia Resources Authority, Infrastructure Rev. (St. Moral, VA), 5%, 11/01/2040		160,000	162,315
Virginia Resources Authority, Infrastructure Rev. (Virginia Pooled Financing Program), “C”, 4%, 11/01/2044		3,235,000	3,788,411
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, 5%, 11/01/2025 (Prerefunded 11/01/2021)		1,540,000	1,635,819
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2025 (Prerefunded 11/01/2021) (u)		1,090,000	1,156,316
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2025 (u)		155,000	164,314
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2027 (Prerefunded 11/01/2021) (u)		5,590,000	5,930,096
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2027 (u)		165,000	174,710
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2028 (Prerefunded 11/01/2021) (u)		2,900,000	3,076,436
Virginia Resources Authority, Infrastructure Rev., Pooled Financing Program, “B”, 5%, 11/01/2028 (u)		100,000	105,802
Virginia Resources Authority, Infrastructure Rev., Unrefunded Balance, 5%, 11/01/2025		55,000	58,457
Virginia Resources Authority, Water & Sewer Systems Rev. (Tukahoe Creek Project), Capital Appreciation, 0%, 11/01/2033		2,245,000	1,431,502
Virginia Resources Authority, Water & Sewer Systems Rev. (Tukahoe Creek Project), Capital Appreciation, 0%, 11/01/2034		2,250,000	1,367,190
Virginia Resources Authority, Water & Sewer Systems Rev. (Tukahoe Creek Project), Capital Appreciation, 0%, 11/01/2035		1,950,000	1,127,587
Virginia Resources Authority, Water & Sewer Systems Rev. (Tukahoe Creek Project), Capital Appreciation, 0%, 11/01/2036		1,250,000	686,913
			$40,679,302
Total Municipal Bonds			$348,324,288
Bonds – 0.1%
Consumer Services – 0.1%
Toll Road Investors Partnership II LP, Capital Appreciation, NATL, 0%, 2/15/2043 (n)	$	1,200,000	$357,741
Investment Companies (h) – 0.3%
Money Market Funds – 0.3%
MFS Institutional Money Market Portfolio, 0.17% (v)		942,252	$942,347
Other Assets, Less Liabilities – (0.7)%			(2,521,838)
Net Assets – 100.0%			$347,102,538

(a)	Non-income producing security.
(d)	In default.

7

Portfolio of Investments (unaudited) – continued

(h)	An affiliated issuer, which 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. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $942,347 and $348,682,029, respectively.
(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 $1,212,439, representing 0.3% of net assets.
(u)	Underlying security deposited into special purpose trust upon creation of self-deposited inverse floaters.
(v)	Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.
(w)	When-issued security.

The following abbreviations are used in this report and are defined:
AAC	Ambac Assurance Corp.
AGM	Assured Guaranty Municipal
ASSD GTY	Assured Guaranty Insurance Co.
FLR	Floating Rate. Interest rate resets periodically based on the parenthetically disclosed reference rate plus a spread (if any). The period-end rate reported may not be the current rate. All reference rates are USD unless otherwise noted.
FNMA	Federal National Mortgage Assn.
LIBOR	London Interbank Offered Rate
NATL	National Public Finance Guarantee Corp.

Derivative Contracts at 6/30/20
Futures Contracts
Description	Long/ Short	Currency	Contracts	Notional Amount	Expiration Date	Value/Unrealized Appreciation (Depreciation)
Liability Derivatives
Interest Rate Futures
U.S. Treasury Bond	Short	USD	30	$5,356,875	September – 2020	$(29,174)

At June 30, 2020, the fund had cash collateral of $150,000 to cover any collateral or margin obligations for certain derivative contracts.

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

8

Supplemental Information

6/30/20 (unaudited)

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(1) Investment Valuations

Debt instruments and floating rate loans, 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 may be valued at amortized cost, which approximates market value. Futures contracts are generally valued at last posted settlement price on their primary exchange as provided by a third-party pricing service. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation on their primary exchange as provided by a third-party pricing service. 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. In determining values, 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 affected 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 halt 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, such as futures contracts. The following is a summary of the levels used as of June 30, 2020 in valuing the fund's assets or liabilities:

Financial Instruments	Level 1	Level 2	Level 3	Total
Municipal Bonds	$—	$348,324,288	$—	$348,324,288
U.S. Corporate Bonds	—	357,741	—	357,741
Mutual Funds	942,347	—	—	942,347
Total	$942,347	$348,682,029	$—	$349,624,376
Other Financial Instruments
Futures Contracts – Liabilities	$(29,174)	$—	$—	$(29,174)

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

(2) Investments in 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 following were affiliated issuers:

Affiliated Issuers	Beginning Value	Purchases	Sales Proceeds	Realized Gain (Loss)	Change in Unrealized Appreciation or Depreciation	Ending Value
MFS Institutional Money Market Portfolio	$1,936,190	$43,530,694	$44,524,391	$148	$(294)	$942,347

9

Supplemental Information (unaudited) – continued

Affiliated Issuers	Dividend Income	Capital Gain Distributions
MFS Institutional Money Market Portfolio	$3,850	$—

(3) Jurisdiction Weightings

Jurisdiction weighting percentages based on net assets, as of June 30, 2020, are as follows:

Virginia	71.7%
Puerto Rico	8.5%
Washington DC	6.4%
Tennessee	1.7%
Illinois	1.6%
New York	1.5%
Pennsylvania	1.5%
Guam	1.4%
Ohio	1.2%
Colorado	1.0%
Texas	1.0%
Maryland	0.9%
California	0.4%
New Jersey	0.3%
Alabama	0.3%
Louisiana	0.2%
Indiana	0.1%
Iowa	0.1%
Michigan	0.1%

The jurisdiction weighting percentages include both accrued interest amounts and equivalent exposure from any derivatives holdings, if applicable.

(4) Impacts of COVID-19

The pandemic related to the global spread of novel coronavirus disease (COVID-19), which was first detected in December 2019, has resulted in significant disruptions to global business activity and the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the securities and commodities markets in general. This pandemic, the full effects of which are still unknown, has resulted in substantial market volatility and may have adversely impacted the prices and liquidity of the fund's investments and the fund's performance.

10