{
  "page": "compare",
  "query": {
    "a": "MTSCX",
    "b": "MFSSX"
  },
  "retrieved_at": "2026-07-07T18:43:10+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 South Carolina Municipal Bond Fund",
    "ticker": "MTSCX",
    "slug": "MTSCX",
    "series_id": "S000002525",
    "html_url": "https://fundwatcher.app/funds/MTSCX/"
  },
  "fund_b": {
    "name": "MFS Massachusetts Municipal Bond Fund",
    "ticker": "MFSSX",
    "slug": "MFSSX",
    "series_id": "S000002534",
    "html_url": "https://fundwatcher.app/funds/MFSSX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1122596060035186758773600061",
    "coverage_b_by_a": "0.1122596060035186758773600061",
    "shared_count": 65,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-03-31"
    },
    "a_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",
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      },
      {
        "name": "Woodruff Facilities Corp., Series 2025",
        "value": "2375773.30",
        "weight": "0.00990021",
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      },
      {
        "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",
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      },
      {
        "name": "South Carolina State Housing Finance and Development Authority, Series 2026A",
        "value": "2224354.60",
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      {
        "name": "Clemson University",
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        "weight": "0.00926059",
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      {
        "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",
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      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "2086534.47",
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      {
        "name": "Clemson University, Series 2025A",
        "value": "2082896.00",
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      {
        "name": "SOUTH CAROLINA ST PUBLIC SVC AUTH REVENUE",
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      },
      {
        "name": "City of Charleston Waterworks & Sewer System Revenue",
        "value": "2076405.20",
        "weight": "0.00865270",
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      },
      {
        "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
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      {
        "name": "South Carolina (State of) Jobs-Economic Development Authority (Prisma Health Obligated Group), Series 2018, RB",
        "value": "2056628.00",
        "weight": "0.00857029",
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      },
      {
        "name": "SOUTH CAROLINA ST PUBLIC SVC AUTH REVENUE",
        "value": "2053265.00",
        "weight": "0.00855627",
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      },
      {
        "name": "Columbia Facilities Corp., Series 2025 A",
        "value": "2051626.00",
        "weight": "0.00854944",
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      },
      {
        "name": "SC MDUMED 5.25 11/15/2050",
        "value": "2048013.60",
        "weight": "0.00853439",
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      {
        "name": "Corp. ForGreer, Series 2025",
        "value": "2040564.80",
        "weight": "0.00850335",
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      {
        "name": "CHARLSTN SC ARP 5.25% 7/1/2054",
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      {
        "name": "Spartanburg County School District No. 7",
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      {
        "name": "County of Horry",
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        "weight": "0.00845797",
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      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "2022353.50",
        "weight": "0.00842746",
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      {
        "name": "South Carolina Jobs-Economic Development Authority, Series 2025",
        "value": "2020207.80",
        "weight": "0.00841852",
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      {
        "name": "NORTH CHRLTN SC 5% 10/1/2040",
        "value": "2011061.20",
        "weight": "0.00838040",
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      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH ECON DEV REVENUE",
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      },
      {
        "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",
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      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH ECON DEV REVENUE",
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      {
        "name": "South Carolina Jobs-Economic Development Authority, Series 2023A",
        "value": "1985930.40",
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      {
        "name": "UNIV SC HGH ED 5% 5/1/2046",
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      {
        "name": "GREENWOOD HOSP-REF",
        "value": "1976551.17",
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      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH RSDL DEV REVENUE",
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        "weight": "0.00819585",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "1937259.53",
        "weight": "0.00807286",
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      {
        "name": "HORRY CNTY S C 4.50% 9/1/2052",
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      {
        "name": "College of Charleston, Series 2025A",
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      {
        "name": "BEAUFORT CNTY 4% 3/1/2048",
        "value": "1896257.00",
        "weight": "0.00790200",
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      },
      {
        "name": "South Island Public Service District",
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      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH HOSP REVENUE",
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    ],
    "b_top": [
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      {
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      {
        "name": "Commonwealth of Massachusetts Transportation Fund, Series 2025A",
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      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
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      {
        "name": "MA CLEAN WTR TRUST-27",
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      {
        "name": "MBTA SLS TAX 5.25% 7/1/55",
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      {
        "name": "MASSACHUSETTS ST",
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        "weight": "0.01032870",
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      },
      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
        "value": "4156830.40",
        "weight": "0.01028392",
        "shared": false
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      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
        "value": "4139378.40",
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      {
        "name": "MA ST TRANS REV 5% 6/1/2053",
        "value": "4128929.20",
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      {
        "name": "Tri-County Regional Vocational Technical School District, Series CHAPTER 70B",
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      {
        "name": "MASS DEVEL FIN 4% 10/1/2045",
        "value": "3683306.52",
        "weight": "0.00911243",
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      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "3618162.86",
        "weight": "0.00895126",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
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      {
        "name": "MASSACHUSETTS ST PORT AUTH",
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      {
        "name": "Massachusetts Development Finance Agency, Series 2025W",
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      {
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      {
        "name": "Massachusetts Housing Finance Agency",
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      {
        "name": "Massachusetts Bay Transportation Authority, Series 2025 B",
        "value": "3220527.00",
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      },
      {
        "name": "Massachusetts Educational Financing Authority",
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      {
        "name": "WAKEFIELD MA REGD B/E 5.00000000",
        "value": "3159303.90",
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      },
      {
        "name": "Massachusetts Development Finance Agency",
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        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
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      {
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      {
        "name": "MASSACHUSETTS ST",
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      {
        "name": "MASSACHUSETTS ST PORT AUTH",
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      {
        "name": "MASSACHUSETTS ST TRANSPRTN FUND REVENUE",
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      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.50000000",
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      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000",
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      {
        "name": "Massachusetts Housing Finance Agency",
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      {
        "name": "Massachusetts Port Authority, Revenue Bonds, Refunding Series 2017A",
        "value": "3019395.90",
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      },
      {
        "name": "Massachusetts (Commonwealth of), Series 2024 E, GO Bonds",
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      {
        "name": "Massachusetts Housing Finance Agency, Series 2013B",
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      {
        "name": "Massachusetts Housing Finance Agency, Series 249",
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      },
      {
        "name": "S E ENERGY COOP DT",
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      },
      {
        "name": "MA ST DEV FIN -J2",
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      },
      {
        "name": "Nashoba Regional School District",
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      {
        "name": "Commonwealth of Massachusetts Transportation Fund Revenue",
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      {
        "name": "Massachusetts Development Finance Agency 4.00% 07/01/2039",
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      {
        "name": "MASSACHUSETTS ST PORT AUTH",
        "value": "2832906.44",
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      },
      {
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      },
      {
        "name": "NEW BEDFORD MA",
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      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2770168.63",
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      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "2721192.71",
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      },
      {
        "name": "MA ST DEV FIN AGY-N",
        "value": "2709922.68",
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      },
      {
        "name": "Massachusetts Housing Finance Agency, Single Family Housing Revenue Bonds, Social Series 2024-234",
        "value": "2705206.90",
        "weight": "0.00669263",
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      },
      {
        "name": "Massachusetts Development Finance Agency",
        "value": "2624785.64",
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      },
      {
        "name": "CALIFORNIA ST HLTH FACS FING AUTH REVENUE",
        "value": "2485529.50",
        "weight": "0.00614915",
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      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "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"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-011422",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011422/0002071691-26-011422-index.htm"
    }
  ]
}