New York City Transitional Finance Authority Future Tax Secured

Quarterly Report

June 30, 2023

MFS^® New York
Municipal Bond Fund

MNY-Q1

Portfolio of Investments

6/30/23 (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 – 95.9%
Airport Revenue – 4.4%
Albany County, NY, Airport Authority Rev., “A”, 5%, 12/15/2043	$	1,500,000	$1,571,186
New York Transportation Development Corp., Special Facilities Rev. (LaGuardia Airport, Terminal B Redevelopment), “A”, AGM, 4%, 7/01/2031		2,000,000	2,002,838
New York Transportation Development Corp., Special Facilities Rev. (Terminal 4 John F. Kennedy International Airport Project), “A”, 4%, 12/01/2040		1,500,000	1,424,488
Niagara, NY, Frontier Transportation Authority Rev. (Buffalo-Niagara International Airport), “A”, 5%, 4/01/2028		650,000	653,179
Niagara, NY, Frontier Transportation Authority Rev. (Buffalo-Niagara International Airport), “A”, 5%, 4/01/2029		500,000	502,679
Niagara, NY, Frontier Transportation Authority Rev. (Buffalo-Niagara International Airport), “A”, 5%, 4/01/2038		1,000,000	1,041,072
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, 5%, 12/01/2044		90,000	90,716
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, BAM, 5%, 12/01/2039		15,000	15,185
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2039		80,000	80,226
Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2044		130,000	129,877
			$7,511,446
General Obligations - General Purpose – 5.4%
Bridgeview, IL, Stadium and Redevelopment Projects, Taxable, AAC, 5.14%, 12/01/2036	$	615,000	$556,963
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, Series 2022A, 0%, 7/01/2024		17,681	16,936
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, Series 2022A, 0%, 7/01/2033		139,873	85,515
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 5.625%, 7/01/2027		119,953	126,305
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 5.625%, 7/01/2029		118,007	126,378
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 5.75%, 7/01/2031		114,620	125,189
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2033		108,689	103,261
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2035		184,514	171,494
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2037		83,850	75,249
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2041		114,004	98,988
Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2046		354,563	299,563
Long Beach, NY, General Obligation, “B”, BAM, 4.625%, 7/15/2052		2,000,000	2,012,968
New York, NY, “B-1”, 3%, 10/01/2044		1,825,000	1,486,482
New York, NY, “D-1”, 5%, 12/01/2038		2,000,000	2,157,126
New York, NY, “J”, FGIC, 5.5%, 2/15/2026		5,000	5,009
Poughkeepsie, NY, Dutchess County Public Improvement, 5%, 6/01/2031		635,000	649,393
State of Illinois, General Obligation, 5.5%, 5/01/2039		215,000	234,905
State of Illinois, General Obligation, 5.75%, 5/01/2045		200,000	217,781
Yonkers, NY, General Obligation, “F”, BAM, 5%, 11/15/2042		750,000	822,946
			$9,372,451
Healthcare Revenue - Hospitals – 11.0%
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2026	$	450,000	$427,835
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2027		300,000	280,909
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Catholic Health System, Inc. Project), 5%, 7/01/2029		590,000	537,103
California Health Facilities Financing Authority Rev. (Cedars-Sinai Health System), “A”, 5%, 8/15/2051		2,000,000	2,173,210
Dutchess County, NY, Local Development Corp. Rev. (Health Quest Systems, Inc. Project), 4%, 7/01/2041		1,500,000	1,357,482
Dutchess County, NY, Local Development Corp. Rev. (Health Quest Systems, Inc. Project), “A”, 5%, 7/01/2044 (Prerefunded 7/01/2024)		1,000,000	1,018,219
Jefferson County, NY, Civic Development Corp. Rev. (Samaritan Medical Center), “A”, 5%, 11/01/2037		2,000,000	1,903,785
Monroe County, NY, Industrial Development Corp. Rev. (Rochester General Hospital Project), 5%, 12/01/2046		2,000,000	2,001,825
Nassau County, NY, Local Economic Assistance Corp. Rev. (Catholic Health Services of Long Island Obligated Group Project), 5%, 7/01/2032		1,000,000	1,014,652
New York Dormitory Authority Rev. (HYU Langone Hospitals Obligated Group), “A”, 4%, 7/01/2050		2,000,000	1,864,151
New York Dormitory Authority Rev. (Montefiore Obligated Group), “A”, 4%, 9/01/2050		1,500,000	1,271,671
New York Dormitory Authority Rev. (Norwell Health Obligated Group), “A”, 4.25%, 5/01/2052		3,000,000	2,942,988
New York Dormitory Authority Rev. (Orange Regional Medical Center Obligated Group Rev.), 5%, 12/01/2035 (n)		800,000	800,449
Royal Oak, MI, Hospital Finance Authority Rev. (William Beaumont Hospital), 5%, 9/01/2039 (Prerefunded 3/01/2024)		1,290,000	1,305,221
Westchester County, NY, Health Care Corp. Rev., “B”, “C-2”, 6%, 11/01/2030		120,000	120,195
			$19,019,695

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Healthcare Revenue - Long Term Care – 2.6%
Brookhaven, NY, Local Development Corp. Rev. (Active Retirement Community, Inc. d/b/a/ Jefferson's Ferry Project), 5.25%, 11/01/2036	$	1,000,000	$1,012,372
Brookhaven, NY, Local Development Corp. Rev. (Active Retirement Community, Inc. d/b/a/ Jefferson's Ferry Project), “A”, 4%, 11/01/2045		2,000,000	1,678,089
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Orchard Park CCRC, Inc. Project), 5%, 11/15/2037		750,000	750,946
Tompkins County, NY, Development Corp. Continuing Care Retirement Community Rev. (Kendal at Ithaca, Inc. Project), “A”, 5%, 7/01/2044		915,000	867,167
Ulster County, NY, Capital Resource Corp. Rev. (Woodland Pond at New Paltz Project), 4%, 9/15/2025		165,000	156,258
			$4,464,832
Industrial Revenue - Airlines – 4.6%
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 3%, 8/01/2031	$	1,500,000	$1,334,034
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 5%, 8/01/2031		1,000,000	1,000,924
New York Transportation Development Corp., Special Facilities Rev. (American Airlines, Inc. John F. Kennedy International Airport Project), 5.375%, 8/01/2036		1,035,000	1,050,452
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 5%, 1/01/2034		1,000,000	1,035,975
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 5%, 1/01/2036		2,000,000	2,062,347
New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D Redevelopment Project), 4.375%, 10/01/2045		1,500,000	1,461,379
			$7,945,111
Industrial Revenue - Other – 0.2%
Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 3.625%, 1/01/2035 (n)	$	200,000	$159,539
Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 2.875%, 1/01/2041 (n)		255,000	166,076
			$325,615
Industrial Revenue - Paper – 0.3%
Build NYC Resource Corp. Solid Waste Disposal Rev. (Pratt Paper, Inc. Project), 4.5%, 1/01/2025 (n)	$	445,000	$446,675
Miscellaneous Revenue - Other – 5.7%
Battery Park, NY, Authority Senior Rev., “A”, 5%, 11/01/2053 (w)	$	2,000,000	$2,201,980
Matching Fund Special Purpose Securitization Corp., “A”, 5%, 10/01/2026		90,000	90,723
New York City Convention Center Development Corp., Capital Appreciation, “B”, AGM, 0%, 11/15/2043		680,000	263,526
New York Liberty Development Corp., Liberty Rev. (3 World Trade Center Project), “1”, 5%, 11/15/2044 (n)		1,940,000	1,907,377
New York Liberty Development Corp., Liberty Rev. (3 World Trade Center Project), “2”, 5.375%, 11/15/2040 (n)		1,500,000	1,502,718
New York, NY, Industrial Development Agency, Airport Facilities Rev. (Transportation Infrastructure Properties LLC), 5%, 7/01/2028		2,585,000	2,585,579
Syracuse, NY, Industrial Development Agency PILOT Rev. (Carousel Center Project), “A”, 5%, 1/01/2034		750,000	567,131
Syracuse, NY, Industrial Development Agency PILOT Rev. (Carousel Center Project), “A”, 5%, 1/01/2036		1,000,000	744,941
			$9,863,975
Multi-Family Housing Revenue – 14.3%
National Finance Authority, New Hampshire Municipal Certificates, “1-A”, 4.375%, 9/20/2036	$	655,438	$641,954
New York Housing Finance Agency Affordable Housing Rev. (Climate Bond), “B”, 3.7%, 11/01/2038		1,450,000	1,356,723
New York Housing Finance Agency Affordable Housing Rev. (Climate Bond), “I”, 4%, 11/01/2043		1,015,000	960,745
New York Housing Finance Agency Affordable Housing Rev., “E-1”, 4.125%, 11/01/2047		4,080,000	3,773,098
New York Housing Finance Agency Affordable Housing Rev., “F-1”, 5.1%, 11/01/2052		1,000,000	1,018,514
New York Housing Finance Agency Affordable Housing Rev., “F-1”, 5.15%, 11/01/2057		1,200,000	1,222,685
New York Housing Finance Agency Affordable Housing Rev., “G-1”, 4.625%, 11/01/2042		350,000	353,052
New York Housing Finance Agency Affordable Housing Rev., “G-1”, 4.8%, 11/01/2047		1,000,000	1,014,053
New York State Housing Finance Agency Affordable Rev., “A-2”, 2.5%, 11/01/2060 (Put Date 5/01/2027)		2,000,000	1,906,641
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (8 Spruce Street), “E”, 3.5%, 2/15/2048		276,686	271,456
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (8 Spruce Street), “F”, 4.5%, 2/15/2048		750,000	735,750

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Multi-Family Housing Revenue – continued
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.6%, 11/01/2042	$	1,000,000	$1,012,511
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.75%, 11/01/2047		500,000	505,704
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “F-1”, 4.85%, 11/01/2052		500,000	504,069
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Development Bonds), “G”, 2.45%, 11/01/2045		2,500,000	1,705,384
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Neighborhood Bonds), “A-3-A”, 3.8%, 11/01/2039		1,870,000	1,763,945
New York, NY, Housing Development Corp., Multi-Family Housing Rev. (Sustainable Neighborhood Bonds), “C-1-A”, 3.95%, 11/01/2048		2,610,000	2,444,054
New York, NY, Housing Development Corp., Multi-Family Housing Rev., “C-1”, 4.25%, 11/01/2052		2,500,000	2,289,753
New York, NY, Housing Development Corp., Multi-Family Housing Rev., “F-1”, 2.25%, 11/01/2041		1,535,000	1,071,258
			$24,551,349
Port Revenue – 2.2%
New York Liberty Development Corp., Liberty Refunding Rev. (1 World Trade Center Project), 2.75%, 2/15/2044	$	2,000,000	$1,487,985
Port Authority of NY & NJ (221st Series), 4%, 7/15/2055		2,485,000	2,319,171
			$3,807,156
Sales & Excise Tax Revenue – 4.5%
Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2029	$	20,000	$20,826
Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2030		15,000	15,663
Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2031		20,000	20,987
Guam Government Business Privilege Tax Refunding, “F”, 4%, 1/01/2042		185,000	163,514
Guam Government Business Privilege Tax Rev., “D”, 5%, 11/15/2031		750,000	762,160
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.55%, 7/01/2040		63,000	61,550
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.75%, 7/01/2053		200,000	190,577
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 5%, 7/01/2058		2,186,000	2,131,063
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		451,000	428,915
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040		210,000	199,717
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.536%, 7/01/2053		4,000	3,680
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.784%, 7/01/2058		635,000	601,810
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2024		3,000	2,881
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2027		103,000	87,466
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2029		17,000	13,207
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2031		942,000	672,017
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2033		904,000	587,589
Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2046		3,848,000	1,081,018
Wisconsin Public Finance Authority Limited Obligation Grant Rev. (American Dream at Meadowlands Project), “A”, 6.25%, 8/01/2027 (a)(d)(n)		545,000	416,244
Wisconsin Public Finance Authority Limited Obligation Grant Rev., Taxable (American Dream at Meadowlands Project), ”A“, 5.625%, 8/01/2024 (a)(d)(n)		255,000	194,756
			$7,655,640
Secondary Schools – 6.3%
Buffalo & Erie County, NY, Industrial Land Development Corp. Rev. (Charter School for Applied Technologies Project), “A”, 5%, 6/01/2035	$	1,000,000	$1,022,033
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2025		220,000	217,954
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2029		320,000	315,593
Build NYC Resource Corp. Rev. (Academic Leadership Charter School Project), 4%, 6/15/2036		400,000	373,736
Build NYC Resource Corp. Rev. (Grand Concourse Academy Charter School Project), “A”, 5%, 7/01/2042		550,000	557,200
Build NYC Resource Corp. Rev. (Grand Concourse Academy Charter School Project), “A”, 5%, 7/01/2056		550,000	538,684
Build NYC Resource Corp. Rev. (International Leadership Charter School Project), 6%, 7/01/2043		750,000	749,961
Build NYC Resource Corp. Rev. (KIPP NYC Public Schools Facilities - Canal West Project), 5.25%, 7/01/2052		2,000,000	2,042,193
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2031 (n)		350,000	326,620
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2041 (n)		610,000	492,639
Build NYC Resource Corp. Rev. (New World Preparatory Charter School Project), “A”, 4%, 6/15/2051 (n)		1,265,000	922,761

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Secondary Schools – continued
Build NYC Resource Corp. Rev. (Packer Collegiate Institute Project), 5%, 6/01/2040	$	675,000	$683,450
Nassau County, NY, Local Economic Assistance Corp. Education Rev. (Friends of Roosevelt Children's Academy Charter School, Inc. Project), “A”, 5%, 7/01/2055		1,000,000	992,109
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2034		450,000	460,808
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2035		500,000	511,716
Rensselaer County, NY, Industrial Development Agency, Civic Facility Rev. (Emma Willard School Refunding Project), 5%, 1/01/2036		645,000	659,737
			$10,867,194
Single Family Housing - State – 1.2%
New York Mortgage Agency Homeowner Mortgage Rev., “211”, 3.8%, 10/01/2048	$	410,000	$387,973
New York Mortgage Agency Homeowner Mortgage Rev., “212”, AMT, 3.7%, 10/01/2033		335,000	332,635
New York Mortgage Agency Homeowner Mortgage Rev., “217”, 3.625%, 4/01/2039		355,000	346,974
New York Mortgage Agency Homeowner Mortgage Rev., “239”, 3.25%, 10/01/2051		975,000	941,286
			$2,008,868
State & Local Agencies – 2.4%
New York Dormitory Authority Rev., State Personal Income Tax Rev., 3%, 3/15/2050	$	1,225,000	$951,931
New York Dormitory Authority Rev., State Personal Income Tax, “A” (Group C), 5%, 2/15/2037		1,000,000	1,047,878
Yonkers, NY, Industrial Development Agency, School Facility Rev. (New Community School Project), 5%, 5/01/2042		2,000,000	2,185,049
			$4,184,858
Tax - Other – 6.2%
Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5%, 4/01/2045	$	135,000	$139,509
Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5.75%, 4/01/2048		325,000	354,848
Glen Cove, NY, Local Economic Assistance Corp. (Garvies Point Public Improvement Project), Capital Appreciation, “B”, 0%, 1/01/2045		1,970,000	509,856
Guam Government Limited Obligation Rev., “A”, 5%, 12/01/2035		190,000	193,726
Guam Government Limited Obligation Rev., “A”, 5%, 12/01/2036		100,000	101,274
Guam Government Limited Obligation Rev., “A”, 5%, 12/01/2046		300,000	290,378
New York, NY, Transitional Finance Authority Rev., “B-1”, 5%, 8/01/2038		1,175,000	1,263,231
New York, NY, Transitional Finance Authority Rev., “C-1”, 4%, 5/01/2045		1,800,000	1,776,237
New York, NY, Transitional Finance Authority Rev., “E-1”, 5%, 2/01/2043		2,500,000	2,611,987
Triborough Bridge & Tunnel Authority Rev., NY, Payroll Mobility Tax (MTA Bridges and Tunnels), “A-1”, 4%, 5/15/2046		3,350,000	3,281,444
Wisconsin Public Finance Authority Limited Obligation PILOT Rev. (American Dream at Meadowlands Project), 7%, 12/01/2050		165,000	149,805
			$10,672,295
Tobacco – 2.0%
Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020A-2, “1”, 4%, 6/01/2048	$	695,000	$643,246
Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Taxable, “B-1”, 3.85%, 6/01/2050		750,000	679,477
New York Counties Tobacco Trust II, 5.625%, 6/01/2035		5,000	5,089
Tobacco Settlement Asset Securitization Corp., NY, “A”, 5%, 6/01/2035		1,000,000	1,032,967
Tobacco Settlement Asset Securitization Corp., NY, “A”, 5%, 6/01/2036		1,000,000	1,028,848
			$3,389,627
Toll Roads – 1.4%
New York Thruway Authority General Rev., Junior Indebtedness Obligations, “A”, 5.25%, 1/01/2056	$	2,000,000	$2,064,359
Texas Private Activity Surface Transportation Corp., Senior Lien Rev. (NTE Mobility Partners Segments 3 LLC Segments 3A & 3B Facility), 7%, 12/31/2038		205,000	205,923
Texas Private Activity Surface Transportation Corp., Senior Lien Rev. (NTE Mobility Partners Segments 3 LLC Segments 3A & 3B Facility), 6.75%, 6/30/2043		170,000	170,661
			$2,440,943
Transportation - Special Tax – 7.3%
Metropolitan Transportation Authority, NY, Refunding Rev. (Climate Bond Certified), “E”, 4%, 11/15/2045	$	1,340,000	$1,264,920
Metropolitan Transportation Authority, NY, Refunding Rev.(Climate Bond Certified), “E”, 5%, 11/15/2033		2,000,000	2,195,542
Metropolitan Transportation Authority, NY, Transportation Rev., “A”, 4%, 11/15/2052		3,170,000	2,927,662

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Transportation - Special Tax – continued
Metropolitan Transportation Authority, NY, Transportation Rev., “A-2”, FLR, 4.19% (67% of SOFR + 0.8%), 11/01/2032 (Put Date 4/01/2026)	$	1,500,000	$1,469,779
Metropolitan Transportation Authority, NY, Transportation Rev., “B”, BAM, 5%, 11/15/2052		3,100,000	3,203,320
New Jersey Transportation Trust Fund Authority, “A”, 5%, 12/15/2039		185,000	196,210
New Jersey Transportation Trust Fund Authority, “CC”, 5.5%, 6/15/2050		125,000	138,133
New York Transportation Development Corp., Exempt Facility Rev. (State Thruway Service Areas Project), 4%, 10/31/2046		1,000,000	879,584
New York Transportation Development Corp., Exempt Facility Rev. (State Thruway Service Areas Project), 4%, 4/30/2053		435,000	369,719
			$12,644,869
Universities - Colleges – 6.7%
Albany, NY, Capital Resource Corp. Rev. (Albany College of Pharmacy Project), “A”, 5%, 12/01/2033	$	125,000	$126,116
Build NYC Resource Corp. Rev. (Albert Einstein School of Medicine, Inc.), 5.5%, 9/01/2045 (n)		1,080,000	1,076,346
Build NYC Resource Corp. Rev. (Manhattan College Project), 5%, 8/01/2047		2,000,000	2,026,813
Dobbs Ferry, NY, Local Development Corp. (Mercy College Project), 5%, 7/01/2039		1,000,000	1,012,250
Dutchess County, NY, Local Development Corp. Rev. (Vassar College Project), 5%, 7/01/2042		1,500,000	1,566,749
Hempstead, NY, Local Development Corp. Rev. (Hofstra University Project), “A”, 3%, 7/01/2051		3,000,000	2,158,711
Hempstead, NY, Local Development Corp. Rev. (Molloy College Project), 5%, 7/01/2036		675,000	689,735
Hempstead, NY, Local Development Corp. Rev. (Molloy College Project), 5%, 7/01/2038		480,000	486,988
Monroe County, NY, Industrial Development Corp. Rev. (University of Rochester Project), “A”, 5%, 7/01/2037		1,000,000	1,065,193
Oneida County, NY, Local Development Corp. Rev. (Hamilton College Project), 5%, 7/01/2051		750,000	862,980
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev., (Clarkson University), “B”, 5%, 9/01/2039		200,000	205,703
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev., (Clarkson University), “B”, 5%, 9/01/2040		150,000	153,651
St. Lawrence County, NY, Industrial Development Agency, Civic Development Corp Rev., (Clarkson University), “B”, 5%, 9/01/2041		100,000	102,115
			$11,533,350
Universities - Dormitories – 1.3%
Onondaga County, NY, Trust for Cultural Resources Rev. (Abby Lane Housing Corp. Project), 5%, 5/01/2040	$	1,000,000	$1,013,460
Westchester County, NY, Local Development Corp. Rev. (Purchase Housing Corp. II Project), 5%, 6/01/2042		1,250,000	1,264,517
			$2,277,977
Utilities - Municipal Owned – 0.9%
Guam Power Authority Rev., “A”, AGM, 5%, 10/01/2039	$	155,000	$158,134
Guam Power Authority Rev., “A”, AGM, 5%, 10/01/2044		180,000	183,463
Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2020 (a)(d)		25,000	9,375
Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2021 (a)(d)		265,000	99,375
Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2022 (a)(d)		430,000	161,250
Puerto Rico Electric Power Authority Refunding Rev., “VV”, NPFG, 5.25%, 7/01/2034		30,000	29,577
Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2029 (a)(d)		675,000	253,125
Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2042 (a)(d)		100,000	37,500
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2021 (a)(d)		50,000	18,750
Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2030 (a)(d)		25,000	9,375
Puerto Rico Electric Power Authority Rev., “CCC”, 5.25%, 7/01/2027 (a)(d)		250,000	93,750
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2021 (a)(d)		115,000	43,125
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2024 (a)(d)		110,000	41,250
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2027 (a)(d)		20,000	7,500
Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2037 (a)(d)		345,000	129,375
Puerto Rico Electric Power Authority Rev., “WW”, 5.375%, 7/01/2022 (a)(d)		20,000	7,500
Puerto Rico Electric Power Authority Rev., “WW”, 5.25%, 7/01/2025 (a)(d)		50,000	18,750
Puerto Rico Electric Power Authority Rev., “ZZ”, 5%, 7/01/2018 (a)(d)		170,000	63,750
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2024 (a)(d)		180,000	67,500
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2024 (a)(d)		55,000	20,625
Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2026 (a)(d)		170,000	63,750
Puerto Rico Electric Power Authority Rev., Taxable, “EEE”, 6.05%, 7/01/2032 (a)(d)		140,000	52,500
			$1,569,299

Portfolio of Investments (unaudited) – continued

Issuer		Shares/Par	Value ($)
Municipal Bonds – continued
Utilities - Other – 3.4%
Black Belt Energy Gas District, AL, Gas Project Rev. (Project No. 8), “A”, 4%, 12/01/2052 (Put Date 12/01/2029)	$	525,000	$510,052
Black Belt Energy Gas District, AL, Gas Project Rev., “A”, 4%, 6/01/2051 (Put Date 12/01/2031)		630,000	622,402
Black Belt Energy Gas District, AL, Gas Project Rev., “C-1”, 5.25%, 2/01/2053 (Put Date 6/01/2029)		1,265,000	1,324,226
California Community Choice Financing Authority, Clean Energy Project Rev., “C”, 5.25%, 1/01/2054 (Put Date 10/01/2031)		1,210,000	1,265,780
Public Authority for Colorado Energy Natural Gas Purchase Rev., 6.5%, 11/15/2038		1,085,000	1,309,383
Tennergy Corp., TN, Gas Supply Rev., “A”, 5.5%, 10/01/2053 (Put Date 12/01/2030)		705,000	746,381
			$5,778,224
Water & Sewer Utility Revenue – 1.6%
Great Neck North, NY, Water Authority System Rev., 3%, 11/01/2044	$	1,340,000	$1,108,193
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2036		215,000	220,801
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2037		270,000	275,923
Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2040		750,000	761,709
Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 1/01/2050		345,000	350,198
Mississippi Development Bank Special Obligation (Jackson Water and Sewer System Rev. Bond Project), AGM, 6.875%, 12/01/2040		100,000	101,118
			$2,817,942
Total Municipal Bonds			$165,149,391
Bonds – 0.4%
Consumer Services – 0.4%
Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2025 (n)	$	415,000	$368,848
Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2043 (n)		945,494	298,481
Total Bonds			$667,329
Contingent Value Instruments – 0.2%
General Obligations - General Purpose – 0.2%
Commonwealth of Puerto Rico, General Obligation Contingent Value Instrument, 11/01/2043	$	514,619	$259,239
Investment Companies (h) – 3.6%
Money Market Funds – 3.6%
MFS Institutional Money Market Portfolio, 5.04% (v)		6,275,068	$6,276,323

Other Assets, Less Liabilities – (0.1)%			(145,348)
Net Assets – 100.0%			$172,206,934

(a)	Non-income producing security.
(d)	In default.
(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 $6,276,323 and $166,075,959, 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 $9,079,529, representing 5.3% of net assets.
(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.

Portfolio of Investments (unaudited) – continued

The following abbreviations are used in this report and are defined:
AAC	Ambac Assurance Corp.
AGM	Assured Guaranty Municipal
BAM	Build America Mutual
FGIC	Financial 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.
NPFG	National Public Finance Guarantee Corp.
SOFR	Secured Overnight Financing Rate

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

Supplemental Information

6/30/23 (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

Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, 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. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. 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, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the 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 significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of June 30, 2023 in valuing the fund's assets and liabilities:

Financial Instruments	Level 1	Level 2	Level 3	Total
Municipal Bonds	$—	$165,408,630	$—	$165,408,630
U.S. Corporate Bonds	—	667,329	—	667,329
Mutual Funds	6,276,323	—	—	6,276,323
Total	$6,276,323	$166,075,959	$—	$172,352,282

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	$4,625,535	$14,686,085	$13,034,690	$(979)	$372	$6,276,323

Supplemental Information (unaudited) – continued

Affiliated Issuers	Dividend Income	Capital Gain Distributions
MFS Institutional Money Market Portfolio	$46,448	$—

(3) Jurisdiction Weightings

Jurisdiction weighting percentages based on net assets, as of June 30, 2023, are as follows:

New York	81.2%
Puerto Rico	5.2%
California	2.4%
Guam	2.1%
Alabama	1.4%
Michigan	1.0%
Illinois	0.9%
Colorado	0.8%
New Hampshire	0.4%
Ohio	0.4%
Tennessee	0.4%
Texas	0.4%
Virginia	0.4%
Wisconsin	0.4%
New Jersey	0.2%
Mississippi	0.1%
U.S. Virgin Islands	0.1%

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