Quarterly Report
December 31, 2023
MFS® Arkansas
Municipal Bond Fund
Municipal Bond Fund
MAR-Q3
Portfolio of Investments
12/31/23 (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 – 97.0% | ||||
| Airport Revenue – 0.9% | ||||
| New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project), AGM, 5.125%, 6/30/2060 | $ | 840,000 | $881,000 | |
| Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, 5%, 12/01/2044 | 95,000 | 95,625 | ||
| Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, BAM, 5%, 12/01/2039 | 105,000 | 106,060 | ||
| Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2039 | 80,000 | 80,217 | ||
| Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “C”, 5%, 12/01/2044 | 125,000 | 125,335 | ||
| $1,288,237 | ||||
| General Obligations - General Purpose – 4.0% | ||||
| Arkansas Higher Education, General Obligation, 4%, 6/01/2029 | $ | 2,000,000 | $2,005,985 | |
| Bridgeview, IL, Stadium and Redevelopment Projects, Taxable, AAC, 5.14%, 12/01/2036 | 375,000 | 335,895 | ||
| Chicago, IL, General Obligation, “A”, 5.5%, 1/01/2035 | 80,000 | 87,165 | ||
| Chicago, IL, General Obligation, “A”, 5.5%, 1/01/2040 | 550,000 | 600,906 | ||
| Chicago, IL, General Obligation, “F”, 5.5%, 1/01/2042 | 225,000 | 226,349 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, Series 2022A, 0%, 7/01/2024 | 9,759 | 9,567 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Capital Appreciation, Series 2022A, 0%, 7/01/2033 | 77,204 | 48,130 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 5.625%, 7/01/2029 | 65,135 | 70,644 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 5.75%, 7/01/2031 | 63,265 | 70,373 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2033 | 59,992 | 58,738 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2035 | 111,025 | 107,344 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2037 | 46,282 | 44,186 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2041 | 62,925 | 57,711 | ||
| Commonwealth of Puerto Rico, General Obligation Restructured Bonds, Series 2022A, 4%, 7/01/2046 | 216,442 | 192,779 | ||
| Little Rock, AR, Library Construction Refunding, 4%, 3/01/2036 | 1,500,000 | 1,558,804 | ||
| State of Illinois, General Obligation, 5.5%, 5/01/2039 | 120,000 | 132,859 | ||
| State of Illinois, General Obligation, 5.75%, 5/01/2045 | 115,000 | 126,562 | ||
| State of Illinois, General Obligation, “B”, 5.5%, 5/01/2047 | 115,000 | 126,336 | ||
| $5,860,333 | ||||
| General Obligations - Schools – 9.3% | ||||
| Benton County, AR, Bentonville School District No. 6 Construction Refunding, “B”, 4%, 6/01/2047 | $ | 1,000,000 | $979,342 | |
| Benton County, AR, Bentonville School District No. 6 Construction, “G”, 2.25%, 6/01/2046 | 1,000,000 | 688,898 | ||
| Crittenden County, AR, Community College District, 4.6%, 2/01/2035 | 285,000 | 285,097 | ||
| Crittenden County, AR, Community College District, 4.7%, 2/01/2040 | 625,000 | 625,174 | ||
| Crittenden County, AR, Earle Special School District Refunding and Construction, 4%, 2/01/2048 | 2,060,000 | 2,059,936 | ||
| Fort Smith, AR, School District No. 100 Construction, “B”, 2.75%, 2/01/2045 | 1,370,000 | 1,086,686 | ||
| Greene County, AR, Tech School District No. T-1, Construction Refunding, 3.75%, 4/01/2041 | 1,100,000 | 1,088,500 | ||
| Greene County, AR, Tech School District No. T-1, Construction Refunding, 3.75%, 4/01/2042 | 1,000,000 | 971,020 | ||
| Johnson County, AR, Clarksville School District No. 17 Refunding, 0.5%, 12/01/2024 | 350,000 | 337,906 | ||
| Little Rock, AR, School District & Construction of Pulaski County, 3%, 2/01/2030 | 1,030,000 | 1,020,112 | ||
| Little Rock, AR, School District & Construction, “A”, BAM, 3%, 2/01/2048 | 755,000 | 608,189 | ||
| North Little Rock, AR, School District No. 1, 2%, 2/01/2027 | 2,000,000 | 1,925,249 | ||
| North Little Rock, AR, School District No. 1, 2%, 2/01/2038 | 865,000 | 646,160 | ||
| Union County, AR, El Dorado School District No. 15 Refunding & Construction, “A”, 5%, 2/01/2044 | 1,250,000 | 1,326,241 | ||
| $13,648,510 | ||||
| Healthcare Revenue - Hospitals – 12.7% | ||||
| Arkansas Development Finance Authority, Health Care Rev. (Baptist Health), 5%, 12/01/2047 | $ | 2,000,000 | $2,097,204 | |
| Arkansas Development Finance Authority, Health Care Rev. (Baptist Health), “A”, 5%, 12/01/2029 | 1,000,000 | 1,033,269 | ||
| Arkansas Development Finance Authority, Health Care Rev. (Baptist Memorial Health Care Corp.), “B-1”, 5%, 9/01/2034 | 740,000 | 786,143 | ||
| Arkansas Development Finance Authority, Health Care Rev. (Baptist Memorial Health Care Corp.), “B-1”, 5%, 9/01/2044 | 2,000,000 | 2,016,574 | ||
| Arkansas Development Finance Authority, Healthcare Facilities Rev. (Carti Surgery Center Project), “B”, 4.25%, 7/01/2041 | 750,000 | 690,893 | ||
| Arkansas Development Finance Authority, Healthcare Facilities Rev. (Carti Surgery Center Project), “B”, 4%, 7/01/2052 | 1,250,000 | 988,452 | ||
| Arkansas Development Finance Authority, Hospital Rev. (Washington Regional Medical Center), 5%, 2/01/2038 | 1,900,000 | 1,942,740 | ||
| Arkansas Development Finance Authority, Hospital Rev. (Washington Regional Medical Center), 4%, 2/01/2042 | 990,000 | 925,719 | ||
| Arkansas Development Finance Authority, Hospital Rev. (Washington Regional Medical Center), “A”, 5%, 2/01/2033 | 1,645,000 | 1,662,636 | ||
1
Portfolio of Investments (unaudited) –
continued
| Issuer | Shares/Par | Value ($) | ||
| Municipal Bonds – continued | ||||
| Healthcare Revenue - Hospitals – continued | ||||
| Batesville, AK, Public Facilities Board, Hospital Rev. (White River Health System, Inc.), 5%, 6/01/2027 | $ | 500,000 | $523,980 | |
| Colorado Health Facilities Authority Rev. (CommonSpirit Health), “A-2”, 4%, 8/01/2049 | 30,000 | 28,774 | ||
| Conway, AR, Hospital Rev. (Conway Regional Medical Center), “A”, 4%, 8/01/2038 | 1,000,000 | 968,727 | ||
| Doylestown, PA, Hospital Authority Rev., “A”, 4%, 7/01/2045 | 20,000 | 14,881 | ||
| Harris County, TX, Cultural Education Facilities Finance Corp., Hospital Rev. (Memorial Hermann Health System), “A”, 4.125%, 7/01/2052 | 810,000 | 777,118 | ||
| Montgomery County, MD, Rev. (Trinity Health Credit Group), 5%, 12/01/2045 | 300,000 | 306,853 | ||
| Pulaski County, AR, Hospital Rev. (Arkansas Children's Hospital), 4.25%, 3/01/2048 | 1,000,000 | 1,000,269 | ||
| Springdale, AR, Public Facilities Board Hospital Rev. (Children's Northwest Project), 5%, 3/01/2040 | 2,820,000 | 2,901,876 | ||
| $18,666,108 | ||||
| Industrial Revenue - Other – 1.6% | ||||
| Lowell, AR, Industrial Development Rev. (Arkansas Democrat-Gazette), VRDN, 2.75%, 10/01/2036 | $ | 2,000,000 | $2,000,000 | |
| Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 2.875%, 1/01/2041 (n) | 170,000 | 112,083 | ||
| Port Beaumont, TX, Navigation District, Dock & Wharf Facility Rev. (Jefferson Gulf Coast Energy Project), “A”, 4%, 1/01/2050 (n) | 390,000 | 279,125 | ||
| $2,391,208 | ||||
| Industrial Revenue - Paper – 0.1% | ||||
| Valparaiso, IN, Exempt Facilities Rev. (Pratt Paper LLC Project), 7%, 1/01/2044 | $ | 100,000 | $100,195 | |
| Miscellaneous Revenue - Other – 2.7% | ||||
| Bryant, AR, Capital Improvement Rev., 4.2%, 2/01/2050 | $ | 1,000,000 | $1,000,442 | |
| Fayetteville, AR, Hotel, Motel and Restaurant Rev., BAM, 5%, 11/01/2034 | 2,000,000 | 2,031,918 | ||
| Matching Fund Special Purpose Securitization Corp., “A”, 5%, 10/01/2026 | 60,000 | 60,692 | ||
| New York Liberty Development Corp., Liberty Rev. (3 World Trade Center Project), “1”, 5%, 11/15/2044 (n) | 375,000 | 371,621 | ||
| Pennsylvania Economic Development Financing Authority, Private Activity Rev. (PennDOT Major Bridges Package One Project), AGM, 5%, 12/31/2057 | 560,000 | 578,013 | ||
| $4,042,686 | ||||
| Multi-Family Housing Revenue – 0.3% | ||||
| National Finance Authority, NH, Municipal Certificates, “1-A”, 4.375%, 9/20/2036 | $ | 432,505 | $436,829 | |
| Sales & Excise Tax Revenue – 18.3% | ||||
| Alma, AR, Sales & Use Tax, AGM, 4.125%, 3/01/2039 | $ | 1,000,000 | $1,035,244 | |
| Bentonville, AR, Sales & Use Tax, 4.125%, 11/01/2038 | 1,000,000 | 1,043,755 | ||
| Bentonville, AR, Sales & Use Tax Refunding Improvement, “B”, 3%, 11/01/2034 | 1,000,000 | 963,673 | ||
| Bentonville, AR, Sales & Use Tax Refunding Improvement, “B”, 3%, 11/01/2035 | 1,000,000 | 954,035 | ||
| Bentonville, AR, Sales & Use Tax Refunding Improvement, “B”, 3%, 11/01/2036 | 785,000 | 742,571 | ||
| Cabot, AR, Sales & Use Tax Refunding and Improvements, “B”, 4%, 12/01/2029 | 250,000 | 264,521 | ||
| Chicago, IL, Metropolitan Pier & Exposition Authority Refunding Bonds (McCormick Place Expansion Project), Capital Appreciation, “B-1”, AGM, 0%, 6/15/2044 | 1,585,000 | 670,463 | ||
| Conway, AR, Sales & Use Tax Rev., Capital Improvement, 4.5%, 5/01/2030 | 850,000 | 850,860 | ||
| Conway, AR, Sales & Use Tax Rev., Capital Improvement, 4.5%, 5/01/2035 | 1,150,000 | 1,151,021 | ||
| Forrest City, AR, Sales & Use Tax , 3%, 11/01/2032 | 350,000 | 346,768 | ||
| Forrest City, AR, Sales & Use Tax , 3%, 11/01/2033 | 370,000 | 366,214 | ||
| Forrest City, AR, Sales & Use Tax , 3%, 11/01/2034 | 380,000 | 375,409 | ||
| Forrest City, AR, Sales & Use Tax , 3%, 11/01/2036 | 400,000 | 385,706 | ||
| Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2030 | 10,000 | 10,769 | ||
| Guam Government Business Privilege Tax Refunding, “F”, 5%, 1/01/2031 | 10,000 | 10,843 | ||
| Guam Government Business Privilege Tax Refunding, “F”, 4%, 1/01/2042 | 110,000 | 105,305 | ||
| Guam Government Business Privilege Tax Rev., “D”, 5%, 11/15/2031 | 415,000 | 422,834 | ||
| Madison County, AR, Sales & Use Tax, 4.375%, 12/01/2043 | 1,000,000 | 1,031,202 | ||
| Madison County, AR, Sales & Use Tax, 4.625%, 12/01/2048 | 500,000 | 536,238 | ||
| Massachusetts Bay Transportation Authority, Sales Tax Rev., “A-1”, 5.25%, 7/01/2029 | 1,000,000 | 1,155,287 | ||
| Mississippi County, AR, 4%, 6/01/2036 | 650,000 | 651,595 | ||
| Mountain View, AK, Sales and Use Tax Rev., BAM, 3%, 11/01/2031 | 335,000 | 330,006 | ||
| Mountain View, AK, Sales and Use Tax Rev., BAM, 3%, 11/01/2034 | 415,000 | 405,754 | ||
| Mountain View, AK, Sales and Use Tax Rev., BAM, 3%, 11/01/2035 | 425,000 | 408,610 | ||
2
Portfolio of Investments (unaudited) –
continued
| Issuer | Shares/Par | Value ($) | ||
| Municipal Bonds – continued | ||||
| Sales & Excise Tax Revenue – continued | ||||
| Phillips County, AR, Sales & Use Tax, BAM, 3.75%, 9/01/2038 | $ | 1,170,000 | $1,170,274 | |
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.55%, 7/01/2040 | 36,000 | 36,175 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 4.75%, 7/01/2053 | 122,000 | 120,737 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-1”, 5%, 7/01/2058 | 2,898,000 | 2,908,112 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040 | 235,000 | 233,288 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.329%, 7/01/2040 | 120,000 | 119,126 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.536%, 7/01/2053 | 2,000 | 1,912 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “2019A-2”, 4.784%, 7/01/2058 | 62,000 | 61,113 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2024 | 3,000 | 2,941 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2027 | 66,000 | 57,446 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2029 | 12,000 | 9,596 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2031 | 593,000 | 434,002 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2033 | 568,000 | 378,324 | ||
| Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “2019A-1”, 0%, 7/01/2046 | 270,000 | 84,651 | ||
| Rogers, AR, Sales & Use Tax Rev., 4%, 11/01/2032 | 1,060,000 | 1,081,847 | ||
| Rogers, AR, Sales & Use Tax Rev., 4%, 11/01/2033 | 1,495,000 | 1,521,512 | ||
| Rogers, AR, Sales & Use Tax Rev., “B”, 5%, 11/01/2036 | 2,000,000 | 2,095,194 | ||
| Springdale, AR, Sales & Use Tax Refunding & Improvement, Taxable, “B”, BAM, 4.125%, 8/01/2050 | 2,000,000 | 1,992,476 | ||
| Wisconsin Public Finance Authority Limited Obligation Grant Rev. (American Dream at Meadowlands Project), “A”, 6.25%, 8/01/2027 (a)(d)(n) | 280,000 | 218,400 | ||
| Wisconsin Public Finance Authority Limited Obligation Grant Rev., Taxable (American Dream at Meadowlands Project), ”A“, 5.625%, 8/01/2024 (a)(d)(n) | 200,000 | 156,000 | ||
| $26,901,809 | ||||
| Secondary Schools – 0.6% | ||||
| Arkansas Development Finance Authority, Charter School Capital Improvement Rev. (LISA Academy Project), 4.5%, 7/01/2039 | $ | 750,000 | $698,391 | |
| District of Columbia Rev. (Rocketship D.C.), “A”, 5%, 6/01/2039 (n) | 250,000 | 236,364 | ||
| $934,755 | ||||
| Single Family Housing - State – 0.8% | ||||
| Maryland Community Development Administration, Department of Housing & Community Development Residential Rev., “A”, GNMA, 4.45%, 9/01/2043 | $ | 825,000 | $839,125 | |
| Maryland Community Development Administration, Department of Housing & Community Development Residential Rev., “A”, GNMA, 4.5%, 9/01/2046 | 275,000 | 278,824 | ||
| $1,117,949 | ||||
| State & Local Agencies – 2.5% | ||||
| Arkansas Development Finance Authority Rev. (Donaghey Plaza Project), 5%, 6/01/2034 | $ | 2,605,000 | $2,608,715 | |
| North Carolina Turnpike Authority, Triangle Expressway System Appropriation Rev., Capital Appreciation, 0%, 1/01/2044 | 2,360,000 | 1,027,621 | ||
| $3,636,336 | ||||
| Student Loan Revenue – 0.1% | ||||
| Iowa Student Loan Liquidity Corp. Rev., “B”, 3%, 12/01/2039 | $ | 10,000 | $9,649 | |
| Iowa Student Loan Liquidity Corp. Rev., “C”, 3.5%, 12/01/2044 | 185,000 | 154,730 | ||
| $164,379 | ||||
| Tax - Other – 4.3% | ||||
| Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5%, 4/01/2045 | $ | 90,000 | $93,920 | |
| Chicago, IL, Board of Education, Dedicated Capital Improvement Tax Bond, 5.75%, 4/01/2048 | 260,000 | 284,338 | ||
| Fayetteville, AR, Liberty Improvement Bonds, 4%, 1/01/2037 | 2,000,000 | 2,028,118 | ||
| Little Rock, AR, Hotel & Restaurant Gross Receipts Tax Rev., 5%, 7/01/2034 | 3,000,000 | 3,029,177 | ||
| Triborough Bridge & Tunnel Authority Rev., NY, Payroll Mobility Tax (MTA Bridges and Tunnels), ”C-3“, 3%, 5/15/2051 | 890,000 | 719,781 | ||
| Wisconsin Public Finance Authority Limited Obligation PILOT Rev. (American Dream at Meadowlands Project), 7%, 12/01/2050 | 100,000 | 93,156 | ||
| $6,248,490 | ||||
| Tax Assessment – 0.0% | ||||
| Brunswick, MD, Special Obligation Refunding (Brunswick Crossing Special Taxing District), 4%, 7/01/2029 | $ | 15,000 | $14,803 | |
| Brunswick, MD, Special Obligation Refunding (Brunswick Crossing Special Taxing District), 5%, 7/01/2036 | 13,000 | 13,230 | ||
| $28,033 | ||||
3
Portfolio of Investments (unaudited) –
continued
| Issuer | Shares/Par | Value ($) | ||
| Municipal Bonds – continued | ||||
| Tobacco – 2.7% | ||||
| Arkansas Development Finance Authority, Tobacco Settlement Rev. (Cancer Research Center Project), Capital Appreciation, AAC, 0%, 7/01/2027 | $ | 2,470,000 | $2,209,976 | |
| Arkansas Development Finance Authority, Tobacco Settlement Rev. (Cancer Research Center Project), Capital Appreciation, AAC, 0%, 7/01/2028 | 500,000 | 433,056 | ||
| Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020A-2, “1”, 4%, 6/01/2048 | 185,000 | 170,859 | ||
| Buckeye, OH, Tobacco Settlement Financing Authority Senior Asset-Backed Refunding, 2020B-2, “2”, 5%, 6/01/2055 | 750,000 | 704,817 | ||
| Golden State, CA, Tobacco Securitization Corp., Tobacco Settlement Rev., Taxable, “B-1”, 3.85%, 6/01/2050 | 490,000 | 453,243 | ||
| $3,971,951 | ||||
| Toll Roads – 0.9% | ||||
| Metropolitan Washington, D.C., Airport Authority, Dulles Toll Road Rev. (Dulles Metrorail and Capital Improvement Projects), “A”, AGM, 4%, 10/01/2052 | $ | 1,000,000 | $968,271 | |
| Virginia Small Business Financing Authority Senior Lien Rev. (Elizabeth River Crossings Opco LLC Project), 3%, 1/01/2041 | 500,000 | 410,139 | ||
| $1,378,410 | ||||
| Transportation - Special Tax – 2.0% | ||||
| New Jersey Economic Development Authority Rev. (NJ Transit Transportation Project), 4%, 11/01/2044 | $ | 1,015,000 | $1,015,111 | |
| New Jersey Transportation Trust Fund Authority, “A”, 5%, 12/15/2039 | 125,000 | 135,988 | ||
| New Jersey Transportation Trust Fund Authority, Transportation Program, “BB”, 4%, 6/15/2044 | 1,775,000 | 1,777,716 | ||
| $2,928,815 | ||||
| Universities - Colleges – 13.6% | ||||
| Arkansas State University, Housing System Rev. (Jonesboro Campus), 4.5%, 3/01/2031 | $ | 2,500,000 | $2,502,879 | |
| Arkansas State University, Student Fee Rev. (Jonesboro Campus), “C”, AGM, 4.5%, 3/01/2027 | 545,000 | 545,608 | ||
| Arkansas Technology University Student Fee Rev., “A”, BAM, 5%, 12/01/2042 | 500,000 | 534,661 | ||
| Arkansas Technology University Student Fee Rev., “A”, BAM, 4.5%, 12/01/2047 | 500,000 | 507,197 | ||
| Arkansas Technology University Student Fee Rev., “A”, BAM, 4.5%, 12/01/2052 | 1,000,000 | 1,006,228 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (Fayetteville Campus), “A”, 5%, 11/01/2047 | 2,000,000 | 2,195,177 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAMS Campus), “A”, 5%, 12/01/2045 | 1,705,000 | 1,865,461 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAMS Northwest Arkansas), “A”, 5%, 4/01/2040 | 500,000 | 567,140 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAMS Northwest Arkansas), “A”, 5%, 4/01/2047 | 2,000,000 | 2,206,759 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAMS Northwest Arkansas), “A”, 5%, 4/01/2052 | 500,000 | 546,888 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAPB Campus), 5%, 12/01/2047 | 1,000,000 | 1,091,930 | ||
| Board of Trustees of the University of Arkansas, Various Facilities Rev. (UAPB Campus), 4%, 12/01/2052 | 1,000,000 | 962,787 | ||
| Connecticut Health & Educational Facilities Authority Rev. (Connecticut College Issue), “M”, 3%, 7/01/2047 | 1,120,000 | 846,231 | ||
| Massachusetts Development Finance Agency Rev. (Suffolk University), 4%, 7/01/2051 | 620,000 | 521,312 | ||
| Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Control Facilities Financing Authority, Higher Education Rev. (University of Sacred Heart), 4.375%, 10/01/2031 | 60,000 | 60,048 | ||
| Puerto Rico Industrial, Tourist, Educational, Medical & Environmental Control Facilities Financing Authority, Higher Education Rev. (University of Sacred Heart), 5%, 10/01/2042 | 65,000 | 65,126 | ||
| Pulaski, AR, Student Tuition & Fee Rev. (Technical College), BAM, 5%, 9/01/2030 | 1,000,000 | 1,028,563 | ||
| Red River, TX, Education Finance Corp., Higher Education Rev. (Houston Baptist University Project), 5.5%, 10/01/2046 | 340,000 | 341,230 | ||
| University of Arkansas Facilities Rev. (Fayetteville Campus), “A”, 5%, 11/01/2043 | 1,500,000 | 1,599,617 | ||
| University of Central Arkansas Student Fee Rev., “A”, AGM, 5%, 11/01/2038 | 500,000 | 521,663 | ||
| University of Central Arkansas Student Fee Rev., “A”, AGM, 4%, 11/01/2048 | 550,000 | 521,770 | ||
| $20,038,275 | ||||
| Utilities - Electric Power – 0.4% | ||||
| Texas Municipal Power Agency, Transmission System Rev., AGM, 2%, 9/01/2033 | $ | 625,000 | $524,198 | |
| Utilities - Municipal Owned – 1.7% | ||||
| Benton, AR, Public Utility Rev., AGM, 5%, 9/01/2030 | $ | 1,000,000 | $1,036,128 | |
| Benton, AR, Public Utility Rev., AGM, 5%, 9/01/2035 | 1,000,000 | 1,032,007 | ||
| Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2020 (a)(d) | 15,000 | 3,900 | ||
| Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2021 (a)(d) | 155,000 | 40,300 | ||
| Puerto Rico Electric Power Authority Refunding Rev., “DDD”, 5%, 7/01/2022 (a)(d) | 260,000 | 67,600 | ||
| Puerto Rico Electric Power Authority Refunding Rev., “VV”, NPFG, 5.25%, 7/01/2034 | 15,000 | 14,786 | ||
| Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2029 (a)(d) | 410,000 | 106,600 | ||
| Puerto Rico Electric Power Authority Rev., “A”, 5%, 7/01/2042 (a)(d) | 65,000 | 16,900 | ||
4
Portfolio of Investments (unaudited) –
continued
| Issuer | Shares/Par | Value ($) | ||
| Municipal Bonds – continued | ||||
| Utilities - Municipal Owned – continued | ||||
| Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2021 (a)(d) | $ | 30,000 | $7,800 | |
| Puerto Rico Electric Power Authority Rev., “AAA”, 5.25%, 7/01/2030 (a)(d) | 15,000 | 3,900 | ||
| Puerto Rico Electric Power Authority Rev., “CCC”, 5.25%, 7/01/2027 (a)(d) | 145,000 | 37,700 | ||
| Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2021 (a)(d) | 60,000 | 15,600 | ||
| Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2023 (a)(d) | 70,000 | 18,200 | ||
| Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2027 (a)(d) | 10,000 | 2,600 | ||
| Puerto Rico Electric Power Authority Rev., “TT”, 5%, 7/01/2037 (a)(d) | 210,000 | 54,600 | ||
| Puerto Rico Electric Power Authority Rev., “WW”, 5.375%, 7/01/2022 (a)(d) | 10,000 | 2,600 | ||
| Puerto Rico Electric Power Authority Rev., “WW”, 5.25%, 7/01/2025 (a)(d) | 25,000 | 6,500 | ||
| Puerto Rico Electric Power Authority Rev., “ZZ”, 5%, 7/01/2018 (a)(d) | 95,000 | 24,700 | ||
| Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2023 (a)(d) | 110,000 | 28,600 | ||
| Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2024 (a)(d) | 35,000 | 9,100 | ||
| Puerto Rico Electric Power Authority Rev., “ZZ”, 5.25%, 7/01/2026 (a)(d) | 95,000 | 24,700 | ||
| Puerto Rico Electric Power Authority Rev., Taxable, “EEE”, 6.05%, 7/01/2032 (a)(d) | 80,000 | 19,400 | ||
| $2,574,221 | ||||
| Utilities - Other – 3.4% | ||||
| California Community Choice Financing Authority, Clean Energy Project Rev., “C”, 5.25%, 1/01/2054 (Put Date 10/01/2031) | $ | 815,000 | $862,124 | |
| Osceola, AR, Utility & Improvement Refunding Rev., “A”, BAM, 4.25%, 8/01/2053 | 1,500,000 | 1,485,831 | ||
| Southeast Alabama Energy Authority Commodity Supply Rev. (Project No. 5), “A”, 5.25%, 1/01/2054 (Put Date 7/01/2029) | 755,000 | 803,467 | ||
| Southeast Alabama Energy, Cooperative District Energy Supply Rev., “A-1”, 5.5%, 11/01/2053 (Put Date 1/01/2031) | 1,005,000 | 1,100,382 | ||
| Tennessee Energy Acquisition Corp., Gas Project Rev., “A-1”, 5%, 5/01/2053 (Put Date 5/01/2028) | 725,000 | 756,864 | ||
| $5,008,668 | ||||
| Water & Sewer Utility Revenue – 14.1% | ||||
| Benton County, AR, Washington Regional Public Water Authority Rev., BAM, 4%, 10/01/2052 | $ | 500,000 | $489,046 | |
| Conway, AR, Wastewater Improvement Rev., “A”, 4%, 10/01/2039 | 525,000 | 528,355 | ||
| Fort Smith, AR, Water and Sewer and Construction Rev., 5%, 10/01/2035 | 3,850,000 | 4,169,410 | ||
| Fort Smith, AR, Water and Sewer Refunding Rev., BAM, 5%, 10/01/2028 | 1,370,000 | 1,451,389 | ||
| Fort Smith, AR, Water and Sewer Rev., BAM, 5%, 10/01/2029 | 1,000,000 | 1,058,591 | ||
| Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 7/01/2036 | 85,000 | 87,666 | ||
| Guam Waterworks Authority Rev. (Water and Wastewater System), 5%, 1/01/2046 | 500,000 | 507,569 | ||
| Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 7/01/2029 | 245,000 | 246,964 | ||
| Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 7/01/2035 | 245,000 | 246,772 | ||
| Guam Waterworks Authority Rev. (Water and Wastewater System), “A”, 5%, 1/01/2050 | 200,000 | 205,846 | ||
| Hot Springs, AR, Construction Wastewater Rev., “B”, BAM, 2.75%, 12/01/2047 | 1,000,000 | 768,682 | ||
| Hot Springs, AR, Construction Wastewater Rev., “B”, BAM, 2.75%, 12/01/2050 | 1,000,000 | 744,120 | ||
| Hot Springs, AR, Wastewater Rev., “C”, BAM, 4.5%, 12/01/2052 | 2,000,000 | 2,022,522 | ||
| Hot Springs, AR, Waterworks & Construction Refunding Rev., BAM, 4.25%, 10/01/2047 | 1,500,000 | 1,516,528 | ||
| Hot Springs, AR, Waterworks Rev., BAM, 4%, 10/01/2035 | 1,125,000 | 1,189,156 | ||
| Hot Springs, AR, Waterworks Rev., BAM, 4%, 10/01/2039 | 1,000,000 | 1,024,528 | ||
| Hot Springs, AR, Waterworks Rev., BAM, 4%, 10/01/2041 | 500,000 | 506,830 | ||
| Hot Springs, AR, Waterworks Rev., BAM, 3.75%, 10/01/2043 | 1,750,000 | 1,738,240 | ||
| Malvern, AR, Water and Sewer Refunding and Construction Rev., BAM, 3.7%, 8/01/2043 | 750,000 | 723,653 | ||
| Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Sewage Disposal System Rev. Refunding Second Lien Local Project), “C-7”, NPFG, 5%, 7/01/2032 | 50,000 | 50,273 | ||
| Michigan Finance Authority Local Government Loan Program Rev. (Detroit Water and Sewerage Department Water Supply System Rev. Refunding Second Lien Local Project), “D-6”, NPFG, 5%, 7/01/2036 | 65,000 | 65,279 | ||
| 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 | 75,000 | 75,289 | ||
| Texarkana, AR, Public Facilities Board, Waterworks & Sewer Facilities Rev., AGM, 4%, 9/01/2040 | 550,000 | 564,552 | ||
| Texarkana, AR, Public Facilities Board, Waterworks & Sewer Facilities Rev., AGM, 4%, 9/01/2043 | 685,000 | 693,675 | ||
| $20,674,935 | ||||
| Total Municipal Bonds | $142,565,330 | |||
5
Portfolio of Investments (unaudited) –
continued
| Issuer | Shares/Par | Value ($) | ||
| Bonds – 0.3% | ||||
| Consumer Services – 0.3% | ||||
| Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2025 (n) | $ | 245,000 | $226,703 | |
| Toll Road Investors Partnership II LP, Capital Appreciation, NPFG, 0%, 2/15/2043 (n) | 472,747 | 150,377 | ||
| Total Bonds | $377,080 | |||
| Contingent Value Instruments – 0.1% | ||||
| General Obligations - General Purpose – 0.1% | ||||
| Commonwealth of Puerto Rico, General Obligation Contingent Value Instrument, 11/01/2043 | $ | 265,920 | $144,927 | |
| Investment Companies (h) – 1.7% | ||||
| Money Market Funds – 1.7% | ||||
| MFS Institutional Money Market Portfolio, 5.42% (v) | 2,540,818 | $2,541,326 | ||
| Other Assets, Less Liabilities – 0.9% | 1,311,230 | |||
| Net Assets – 100.0% | $146,939,893 | |||
| (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 $2,541,326 and $143,087,337, 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 $1,750,673, representing 1.2% 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. |
| The following abbreviations are used in this report and are defined: | |
| AAC | Ambac Assurance Corp. |
| AGM | Assured Guaranty Municipal |
| BAM | Build America Mutual |
| GNMA | Government National Mortgage Assn. |
| NPFG | National Public Finance Guarantee Corp. |
| VRDN | Variable rate demand note that may be puttable to the issuer at the option of the holder. The stated interest rate, which generally resets either daily or weekly, represents the rate in effect at period end and may not be the current rate. |
See attached supplemental
information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.
6
Supplemental Information
12/31/23 (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.
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 December 31, 2023 in valuing the fund's assets and
liabilities:
| Financial Instruments | Level 1 | Level 2 | Level 3 | Total |
| Municipal Bonds | $— | $142,710,257 | $— | $142,710,257 |
| U.S. Corporate Bonds | — | 377,080 | — | 377,080 |
| Mutual Funds | 2,541,326 | — | — | 2,541,326 |
| Total | $2,541,326 | $143,087,337 | $— | $145,628,663 |
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 | $2,404,434 | $26,500,905 | $26,362,746 | $(1,185) | $(82) | $2,541,326 |
7
Supplemental Information (unaudited) –
continued
| Affiliated Issuers | Dividend Income | Capital Gain Distributions |
| MFS Institutional Money Market Portfolio | $80,018 | $— |
(3) Jurisdiction Weightings
Jurisdiction weighting percentages
based on net assets, as of December 31, 2023, are as follows:
| Arkansas | 76.6% |
| Puerto Rico | 4.1% |
| New Jersey | 2.0% |
| Illinois | 1.8% |
| Texas | 1.4% |
| Alabama | 1.3% |
| Guam | 1.3% |
| New York | 1.3% |
| Alabama | 1.3% |
| Massachusetts | 1.2% |
| Maryland | 1.0% |
| California | 0.9% |
| Washington DC | 0.8% |
| North Carolina | 0.7% |
| Connecticut | 0.6% |
| Ohio | 0.6% |
| Tennessee | 0.5% |
| Virginia | 0.5% |
| Michigan | 0.4% |
| Pennsylvania | 0.4% |
| New Hampshire | 0.3% |
| Wisconsin | 0.3% |
| Indiana | 0.1% |
| Iowa | 0.1% |
| Colorado (o) | 0.0% |
| U.S. Virgin Islands (o) | 0.0% |
(o) Less than 0.1%.
The jurisdiction weighting
percentages include both accrued interest amounts and equivalent exposure from any derivatives holdings, if applicable.
8