{
  "page": "compare",
  "query": {
    "a": "MBMSX",
    "b": "MFSCX"
  },
  "retrieved_at": "2026-07-07T18:45:20+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": "MBMSX",
    "slug": "MBMSX",
    "series_id": "S000002535",
    "html_url": "https://fundwatcher.app/funds/MBMSX/"
  },
  "fund_b": {
    "name": "MFS South Carolina Municipal Bond Fund",
    "ticker": "MFSCX",
    "slug": "MFSCX",
    "series_id": "S000002525",
    "html_url": "https://fundwatcher.app/funds/MFSCX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.08894570934627048304608903315",
    "coverage_b_by_a": "0.08894570934627048304608903315",
    "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",
        "shared": false
      },
      {
        "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",
        "shared": false
      },
      {
        "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",
        "value": "526050.32",
        "weight": "0.00861759",
        "shared": true
      },
      {
        "name": "Little Rock School District",
        "value": "524720.56",
        "weight": "0.00859580",
        "shared": true
      },
      {
        "name": "Mississippi Development Bank, Series 2025",
        "value": "523145.20",
        "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",
        "value": "511065.05",
        "weight": "0.00837210",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "9422751.47",
        "weight": "0.03926606",
        "shared": true
      },
      {
        "name": "Beaufort-Jasper Water & Sewer Authority, Series 2025A",
        "value": "3715839.20",
        "weight": "0.01548448",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "3421378.91",
        "weight": "0.01425741",
        "shared": true
      },
      {
        "name": "City of Charleston, Series 2022",
        "value": "3129291.00",
        "weight": "0.01304024",
        "shared": false
      },
      {
        "name": "Spartanburg County School District No. 4, Series 2022 A, GO Bonds",
        "value": "3107880.60",
        "weight": "0.01295102",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST PORTS AUTH PORTS REVENUE",
        "value": "3032784.60",
        "weight": "0.01263808",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DE REGD B/E 5.25000000",
        "value": "2900299.50",
        "weight": "0.01208600",
        "shared": false
      },
      {
        "name": "Grand Strand Water & Sewer Authority, Series 2026",
        "value": "2832701.02",
        "weight": "0.01180430",
        "shared": false
      },
      {
        "name": "SPARTANBURG SC REGL HLTH SVCS DIST INC HOSP REVENUE",
        "value": "2790276.30",
        "weight": "0.01162751",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "2728233.21",
        "weight": "0.01136897",
        "shared": false
      },
      {
        "name": "CHARLESTON SC HSG AUTH REVENUE REGD B/E HUD SEC 5.00000000",
        "value": "2578609.50",
        "weight": "0.01074546",
        "shared": false
      },
      {
        "name": "City of Columbia, Series 2023A",
        "value": "2426839.52",
        "weight": "0.01011301",
        "shared": false
      },
      {
        "name": "Woodruff Facilities Corp., Series 2025",
        "value": "2375773.30",
        "weight": "0.00990021",
        "shared": false
      },
      {
        "name": "Medical University Hospital Authority, An Agency of The State of south Carolina FHA Insured Hospital Mortgage, Indian Land Project",
        "value": "2244911.54",
        "weight": "0.00935489",
        "shared": false
      },
      {
        "name": "South Carolina State Housing Finance and Development Authority, Series 2026A",
        "value": "2224354.60",
        "weight": "0.00926923",
        "shared": false
      },
      {
        "name": "Clemson University",
        "value": "2222282.10",
        "weight": "0.00926059",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST PUBLIC SVC A SOUTH CAROLINA PUBLIC SERVICE AUTHORITY",
        "value": "2193887.60",
        "weight": "0.00914227",
        "shared": false
      },
      {
        "name": "PATRIOTS EN GRP 5.25% MT",
        "value": "2135007.40",
        "weight": "0.00889691",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "2086534.47",
        "weight": "0.00869491",
        "shared": false
      },
      {
        "name": "Clemson University, Series 2025A",
        "value": "2082896.00",
        "weight": "0.00867975",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST PUBLIC SVC AUTH REVENUE",
        "value": "2079001.17",
        "weight": "0.00866352",
        "shared": false
      },
      {
        "name": "City of Charleston Waterworks & Sewer System Revenue",
        "value": "2076405.20",
        "weight": "0.00865270",
        "shared": false
      },
      {
        "name": "City of Columbia, Series 2025",
        "value": "2069569.20",
        "weight": "0.00862421",
        "shared": false
      },
      {
        "name": "GREENVILLE-SPARTANBURG SC ARPT DIST ARPT SYS REVENUE",
        "value": "2064811.40",
        "weight": "0.00860439",
        "shared": false
      },
      {
        "name": "Spartanburg County School District No. 4",
        "value": "2064214.00",
        "weight": "0.00860190",
        "shared": false
      },
      {
        "name": "South Carolina (State of) Jobs-Economic Development Authority (Prisma Health Obligated Group), Series 2018, RB",
        "value": "2056628.00",
        "weight": "0.00857029",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST PUBLIC SVC AUTH REVENUE",
        "value": "2053265.00",
        "weight": "0.00855627",
        "shared": false
      },
      {
        "name": "Columbia Facilities Corp., Series 2025 A",
        "value": "2051626.00",
        "weight": "0.00854944",
        "shared": false
      },
      {
        "name": "SC MDUMED 5.25 11/15/2050",
        "value": "2048013.60",
        "weight": "0.00853439",
        "shared": false
      },
      {
        "name": "Corp. ForGreer, Series 2025",
        "value": "2040564.80",
        "weight": "0.00850335",
        "shared": false
      },
      {
        "name": "CHARLSTN SC ARP 5.25% 7/1/2054",
        "value": "2034773.20",
        "weight": "0.00847921",
        "shared": false
      },
      {
        "name": "Spartanburg County School District No. 7",
        "value": "2030795.80",
        "weight": "0.00846264",
        "shared": false
      },
      {
        "name": "County of Horry",
        "value": "2029676.40",
        "weight": "0.00845797",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "2022353.50",
        "weight": "0.00842746",
        "shared": false
      },
      {
        "name": "South Carolina Jobs-Economic Development Authority, Series 2025",
        "value": "2020207.80",
        "weight": "0.00841852",
        "shared": false
      },
      {
        "name": "NORTH CHRLTN SC 5% 10/1/2040",
        "value": "2011061.20",
        "weight": "0.00838040",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH ECON DEV REVENUE",
        "value": "2007575.60",
        "weight": "0.00836588",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH HLTHCARE REVENUE",
        "value": "2004324.20",
        "weight": "0.00835233",
        "shared": false
      },
      {
        "name": "South Carolina State Housing Finance & Development Authority, Series M TEMS BDS 2023 A FN",
        "value": "2003500.40",
        "weight": "0.00834890",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH ECON DEV REVENUE",
        "value": "2002353.80",
        "weight": "0.00834412",
        "shared": false
      },
      {
        "name": "South Carolina Jobs-Economic Development Authority, Series 2023A",
        "value": "1985930.40",
        "weight": "0.00827568",
        "shared": false
      },
      {
        "name": "UNIV SC HGH ED 5% 5/1/2046",
        "value": "1978957.54",
        "weight": "0.00824662",
        "shared": false
      },
      {
        "name": "GREENWOOD HOSP-REF",
        "value": "1976551.17",
        "weight": "0.00823659",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH RSDL DEV REVENUE",
        "value": "1966774.00",
        "weight": "0.00819585",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "1937259.53",
        "weight": "0.00807286",
        "shared": false
      },
      {
        "name": "HORRY CNTY S C 4.50% 9/1/2052",
        "value": "1901860.60",
        "weight": "0.00792535",
        "shared": false
      },
      {
        "name": "College of Charleston, Series 2025A",
        "value": "1896887.40",
        "weight": "0.00790462",
        "shared": false
      },
      {
        "name": "BEAUFORT CNTY 4% 3/1/2048",
        "value": "1896257.00",
        "weight": "0.00790200",
        "shared": false
      },
      {
        "name": "South Island Public Service District",
        "value": "1888969.80",
        "weight": "0.00787163",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH HOSP REVENUE",
        "value": "1885043.80",
        "weight": "0.00785527",
        "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": "0002071691-26-011434",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011434/0002071691-26-011434-index.htm"
    }
  ]
}