{
  "page": "compare",
  "query": {
    "a": "MMSTX",
    "b": "MFALX"
  },
  "retrieved_at": "2026-07-07T17:24:15+00:00",
  "disclaimer": "Informational only — not investment advice. FundWatcher presents publicly available data and makes no recommendation to buy or sell any security. Verify all figures against the source filing before relying on them.",
  "attribution": "Data sourced from U.S. SEC EDGAR filings (Forms N-PORT, N-CEN, and prospectus Risk/Return summaries). FundWatcher is not affiliated with the SEC.",
  "terms": {
    "notice": "Use of this data is subject to the FundWatcher Terms of Service. Information may be used only for personal, non-commercial research and may not be redistributed.",
    "url": "https://fundwatcher.app/terms/"
  },
  "fund_a": {
    "name": "MFS Mississippi Municipal Bond Fund",
    "ticker": "MMSTX",
    "slug": "MMSTX",
    "series_id": "S000002535",
    "html_url": "https://fundwatcher.app/funds/MMSTX/"
  },
  "fund_b": {
    "name": "MFS Alabama Municipal Bond Fund",
    "ticker": "MFALX",
    "slug": "MFALX",
    "series_id": "S000002521",
    "html_url": "https://fundwatcher.app/funds/MFALX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1081080835903995962421121780",
    "coverage_b_by_a": "0.1081080835903995962421121780",
    "shared_count": 50,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "Jackson County Utility Authority",
        "value": "2000631.40",
        "weight": "0.03277370",
        "shared": false
      },
      {
        "name": "Mississippi Home Corp., Series 2024A",
        "value": "1688631.00",
        "weight": "0.02766261",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "1325279.25",
        "weight": "0.02171030",
        "shared": false
      },
      {
        "name": "MS MDCEDU 5 06/01/2042",
        "value": "1261411.13",
        "weight": "0.02066403",
        "shared": false
      },
      {
        "name": "Medical Center Educational Building Corp.",
        "value": "1254090.13",
        "weight": "0.02054410",
        "shared": false
      },
      {
        "name": "MS DEV BK 5.25% 1/1/2034",
        "value": "1110241.00",
        "weight": "0.01818761",
        "shared": false
      },
      {
        "name": "W RANKIN UTIL AUTH",
        "value": "1042610.40",
        "weight": "0.01707971",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank, Series 2025",
        "value": "1037956.10",
        "weight": "0.01700346",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "1034851.30",
        "weight": "0.01695260",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "1034582.33",
        "weight": "0.01694819",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "1032402.75",
        "weight": "0.01691249",
        "shared": true
      },
      {
        "name": "Mississippi Development Bank, Series 2024",
        "value": "1021683.20",
        "weight": "0.01673688",
        "shared": false
      },
      {
        "name": "State of Mississippi, Series 2024",
        "value": "1020528.20",
        "weight": "0.01671796",
        "shared": false
      },
      {
        "name": "State of Mississippi, Series 2018A",
        "value": "1014675.70",
        "weight": "0.01662209",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "1006948.90",
        "weight": "0.01649551",
        "shared": false
      },
      {
        "name": "MS MSSDEV 5 07/01/2048",
        "value": "1003922.30",
        "weight": "0.01644593",
        "shared": false
      },
      {
        "name": "MISSISSIPPI ST HOME CORP SF MTGE REVENUE",
        "value": "989126.70",
        "weight": "0.01620355",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "972746.80",
        "weight": "0.01593522",
        "shared": false
      },
      {
        "name": "Mississippi Home Corp.",
        "value": "955213.90",
        "weight": "0.01564801",
        "shared": false
      },
      {
        "name": "MS HOSP 4% 1/1/2040",
        "value": "954595.70",
        "weight": "0.01563788",
        "shared": false
      },
      {
        "name": "Medical Center Educational Building Corp., Series 2017, Ref. RB",
        "value": "913079.10",
        "weight": "0.01495777",
        "shared": false
      },
      {
        "name": "MS MSSSFH 4.05 12/01/2047",
        "value": "909184.20",
        "weight": "0.01489396",
        "shared": false
      },
      {
        "name": "Medical Center Educational Building Corp., Series 2023, RB",
        "value": "889611.30",
        "weight": "0.01457333",
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      },
      {
        "name": "Mississippi Home Corp.",
        "value": "822064.50",
        "weight": "0.01346680",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST BAY TRANSPRTN AUTH SALES TAX REVENUE",
        "value": "815068.05",
        "weight": "0.01335218",
        "shared": false
      },
      {
        "name": "Warren County, Mississippi, Certificates of Participation, Lease Purchase Jail Project Series 2023",
        "value": "806926.35",
        "weight": "0.01321881",
        "shared": false
      },
      {
        "name": "Warren County, Mississippi, Certificates of Participation, Lease Purchase Jail Project Series 2023",
        "value": "797703.15",
        "weight": "0.01306772",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank, Series 2024",
        "value": "765382.50",
        "weight": "0.01253825",
        "shared": false
      },
      {
        "name": "MS DEV BK SPL/AGM 6.88% 12/1/40",
        "value": "763027.50",
        "weight": "0.01249967",
        "shared": false
      },
      {
        "name": "MS UNIV EDU CORP-A",
        "value": "761849.03",
        "weight": "0.01248037",
        "shared": false
      },
      {
        "name": "MS ST HOME SF 4.8% 12/1/45",
        "value": "754596.08",
        "weight": "0.01236155",
        "shared": false
      },
      {
        "name": "MISSISSIPPI ST HOME CORP SF MT REGD B/E GNMA/FN 4.80000000",
        "value": "749706.98",
        "weight": "0.01228146",
        "shared": false
      },
      {
        "name": "San Diego Unified School District, Series 2010C",
        "value": "747424.99",
        "weight": "0.01224408",
        "shared": false
      },
      {
        "name": "Mississippi Home Corp., Series 2024 C",
        "value": "747109.80",
        "weight": "0.01223891",
        "shared": false
      },
      {
        "name": "Mississippi Home Corp., Series 2024 E",
        "value": "742496.25",
        "weight": "0.01216333",
        "shared": false
      },
      {
        "name": "MS MHSG 4.55% 4/1/2042",
        "value": "736179.50",
        "weight": "0.01205986",
        "shared": false
      },
      {
        "name": "MS MSSDEV 4 06/01/2044",
        "value": "719826.08",
        "weight": "0.01179196",
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      },
      {
        "name": "State of Mississippi",
        "value": "714285.34",
        "weight": "0.01170119",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank",
        "value": "700880.10",
        "weight": "0.01148159",
        "shared": false
      },
      {
        "name": "State of Mississippi, Series 2024",
        "value": "698163.60",
        "weight": "0.01143709",
        "shared": false
      },
      {
        "name": "Mississippi State University Educational Building Corp., Series 2024A",
        "value": "662858.63",
        "weight": "0.01085874",
        "shared": false
      },
      {
        "name": "S E ENERGY COOP DT",
        "value": "602226.63",
        "weight": "0.00986548",
        "shared": false
      },
      {
        "name": "University of Mississippi Educational Building Corp., Series 2017 , Ref. RB",
        "value": "583536.60",
        "weight": "0.00955931",
        "shared": false
      },
      {
        "name": "Mississippi Home Corp., Series 2026A",
        "value": "527590.00",
        "weight": "0.00864281",
        "shared": false
      },
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
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        "weight": "0.00861759",
        "shared": true
      },
      {
        "name": "Little Rock School District",
        "value": "524720.56",
        "weight": "0.00859580",
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      },
      {
        "name": "Mississippi Development Bank, Series 2025",
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        "weight": "0.00857000",
        "shared": false
      },
      {
        "name": "WARREN CO-A-REF-REMK",
        "value": "515369.10",
        "weight": "0.00844261",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank, Special Obligation Bonds, Lamar County School District Series 2025",
        "value": "511065.05",
        "weight": "0.00837210",
        "shared": false
      },
      {
        "name": "Mississippi Development Bank, Series 2025",
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        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
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        "weight": "0.02318169",
        "shared": true
      },
      {
        "name": "Auburn University, Series 2018 A, RB",
        "value": "1519385.10",
        "weight": "0.02173981",
        "shared": false
      },
      {
        "name": "Baldwin County Public Building Authority",
        "value": "1194979.88",
        "weight": "0.01709813",
        "shared": false
      },
      {
        "name": "Irondale Public Building Authority, Series 2024",
        "value": "1053081.80",
        "weight": "0.01506781",
        "shared": false
      },
      {
        "name": "Jefferson (County of), AL, Series 2024, Ref. Revenue Wts.",
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        "weight": "0.01487729",
        "shared": false
      },
      {
        "name": "City of Oxford",
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        "weight": "0.01453700",
        "shared": false
      },
      {
        "name": "State of Alabama Docks Department",
        "value": "1013995.50",
        "weight": "0.01450855",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2022A-1",
        "value": "1011087.10",
        "weight": "0.01446693",
        "shared": false
      },
      {
        "name": "Cherokee County Board of Education",
        "value": "1010067.90",
        "weight": "0.01445235",
        "shared": false
      },
      {
        "name": "Special Care Facilities Financing Authority of the City of Pell City Alabama",
        "value": "992056.90",
        "weight": "0.01419464",
        "shared": false
      },
      {
        "name": "Mobile County Board of School Commissioners",
        "value": "990666.00",
        "weight": "0.01417474",
        "shared": false
      },
      {
        "name": "ALABAMA ST HSG FIN AUTH MF TAX REGD N/C B/E 4.45000000",
        "value": "978883.90",
        "weight": "0.01400616",
        "shared": false
      },
      {
        "name": "Lawrence County Board of Education",
        "value": "960446.20",
        "weight": "0.01374235",
        "shared": false
      },
      {
        "name": "Mobile County Board of School Commissioners",
        "value": "945667.60",
        "weight": "0.01353089",
        "shared": false
      },
      {
        "name": "INFIRMARY HLTH SYS AL SPL CARE FACS FING AUTH REVENUE",
        "value": "940091.70",
        "weight": "0.01345111",
        "shared": false
      },
      {
        "name": "DCH HLTH CARE -A-REV",
        "value": "919803.40",
        "weight": "0.01316082",
        "shared": false
      },
      {
        "name": "HLTH CARE AUTH FOR BAPTIST HLT HLTMED 11/37 FIXED 5",
        "value": "914767.79",
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      },
      {
        "name": "Orange Beach Water Sewer & Fire Protection Authority",
        "value": "903186.40",
        "weight": "0.01292306",
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      },
      {
        "name": "Alabama Community College System, Series 2019",
        "value": "866597.10",
        "weight": "0.01239953",
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      },
      {
        "name": "City of Arab",
        "value": "826335.33",
        "weight": "0.01182345",
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      {
        "name": "Cooper Green Mercy Health Services Authority, Series 2022, RB",
        "value": "822502.03",
        "weight": "0.01176860",
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      {
        "name": "MOBILE AL 0% 2/15/2042",
        "value": "811471.65",
        "weight": "0.01161078",
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      },
      {
        "name": "City of Huntsville",
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      {
        "name": "Alabama Federal Aid Highway Finance Authority, Series 2025, RB",
        "value": "800202.98",
        "weight": "0.01144954",
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      },
      {
        "name": "ALABAMA ST HIGHWAY AUTH SPL OBLIG REVENUE",
        "value": "799980.53",
        "weight": "0.01144636",
        "shared": false
      },
      {
        "name": "City of Huntsville",
        "value": "793902.30",
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      {
        "name": "ALABAMA ST HSG FIN AUTH SF MTG REGD B/E GNMA/FN 5.75000000",
        "value": "793879.38",
        "weight": "0.01135906",
        "shared": false
      },
      {
        "name": "ALABAMA ST HSG FIN AUTH SF MTG REGD B/E GNMA/FN 5.75000000",
        "value": "782520.34",
        "weight": "0.01119653",
        "shared": false
      },
      {
        "name": "AL HSG 6% 4/1/2055",
        "value": "779853.86",
        "weight": "0.01115838",
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      },
      {
        "name": "Birmingham-Jefferson Civic Center Authority, Series 2023A",
        "value": "769175.93",
        "weight": "0.01100560",
        "shared": false
      },
      {
        "name": "Alabama Community College System, Series 2025",
        "value": "768349.35",
        "weight": "0.01099377",
        "shared": false
      },
      {
        "name": "JACKSONVILLE PUBLIC EDUCTNL BLDG AUTH",
        "value": "767893.43",
        "weight": "0.01098725",
        "shared": false
      },
      {
        "name": "Prattville Waterworks Board, Series 2023",
        "value": "763309.95",
        "weight": "0.01092167",
        "shared": false
      },
      {
        "name": "Harvest-Monrovia Water Sewer & Fire Protection Authority, Inc., Series 2025",
        "value": "760658.33",
        "weight": "0.01088372",
        "shared": false
      },
      {
        "name": "Lauderdale County Agriculture Center Authority, Series 2024",
        "value": "758815.35",
        "weight": "0.01085736",
        "shared": false
      },
      {
        "name": "UNIV SOUTH AL 5% 4/1/2049",
        "value": "757641.83",
        "weight": "0.01084056",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "756715.09",
        "weight": "0.01082730",
        "shared": true
      },
      {
        "name": "City of Fort Payne",
        "value": "754689.90",
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      {
        "name": "AL ALSSFM 4.55 10/01/2044",
        "value": "716170.39",
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      },
      {
        "name": "County of Mobile",
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        "weight": "0.01023507",
        "shared": false
      },
      {
        "name": "Madison Water & Wastewater Board",
        "value": "697904.50",
        "weight": "0.00998582",
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      },
      {
        "name": "Cherokee County Public Building Authority",
        "value": "690957.83",
        "weight": "0.00988643",
        "shared": false
      },
      {
        "name": "Alabama Community College System, Series 2024",
        "value": "689100.53",
        "weight": "0.00985985",
        "shared": false
      },
      {
        "name": "Cullman City Board of Education",
        "value": "675377.48",
        "weight": "0.00966350",
        "shared": false
      },
      {
        "name": "Limestone County Water & Sewer Authority, Series 2024",
        "value": "674477.78",
        "weight": "0.00965063",
        "shared": false
      },
      {
        "name": "City of Clanton",
        "value": "590068.55",
        "weight": "0.00844288",
        "shared": false
      },
      {
        "name": "Jacksonville Public Educational Building Authority",
        "value": "582338.62",
        "weight": "0.00833227",
        "shared": false
      },
      {
        "name": "Enterprise Board of Education",
        "value": "541256.15",
        "weight": "0.00774445",
        "shared": false
      },
      {
        "name": "City of Gadsden AL",
        "value": "533025.25",
        "weight": "0.00762668",
        "shared": false
      },
      {
        "name": "MONTGOMERY WTRWORKS",
        "value": "532597.45",
        "weight": "0.00762056",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-011431",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011431/0002071691-26-011431-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-011427",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011427/0002071691-26-011427-index.htm"
    }
  ]
}