{
  "page": "compare",
  "query": {
    "a": "MTLBX",
    "b": "MFSMX"
  },
  "retrieved_at": "2026-07-07T19:12:55+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 Municipal Limited Maturity Fund",
    "ticker": "MTLBX",
    "slug": "MTLBX",
    "series_id": "S000002496",
    "html_url": "https://fundwatcher.app/funds/MTLBX/"
  },
  "fund_b": {
    "name": "MFS Maryland Municipal Bond Fund",
    "ticker": "MFSMX",
    "slug": "MFSMX",
    "series_id": "S000002533",
    "html_url": "https://fundwatcher.app/funds/MFSMX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.06176207204970063903527943261",
    "shared_count": 13,
    "as_of": {
      "a": "2026-04-30",
      "b": "2026-03-31"
    },
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      },
      {
        "name": "COLLIER COUNTY INDUSTRIAL DEVE COLDEV 04/35 FIXED 5",
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      },
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        "name": "CALIFORNIA COMMUNITY VAR",
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      },
      {
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      },
      {
        "name": "WISCONSIN HEALTH & ED VAR",
        "value": "18599815.60",
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      },
      {
        "name": "San Francisco City & County Airport Comm-San Francisco International Airport, Series 2025 A",
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        "name": "CO ST HLTH FACS-UNREF",
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      },
      {
        "name": "TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR",
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      },
      {
        "name": "TX TAREDU 11/15/2055",
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        "name": "Black Belt Energy Gas District",
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      },
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        "name": "New Hampshire Business Finance Authority, Series 2023A",
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      {
        "name": "MAIN STR NAT GA 4% MT",
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      },
      {
        "name": "REPUBLIC SERVICES INC (MPT) 3.45% 12-01-35",
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      },
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        "name": "Deerfield Community School District",
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      {
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      },
      {
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      },
      {
        "name": "MICHIGAN ST HOSP FIN AUTH MICHIGAN STATE HOSPITAL FINANCE AUTHORITY",
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      {
        "name": "DeKalb (County of), GA Housing Authority (Park at 500), Series 2024, RB",
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      },
      {
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      {
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      {
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      {
        "name": "Pennsylvania Economic Development Financing Authority",
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      {
        "name": "WVU HEALTH PUT B 5% 6/1/33 MT",
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      {
        "name": "COLBURN SCHOOL (MPT) 1.75% 08-01-55",
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      {
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      {
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        "name": "City of Hibbing, Series 2025A",
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      {
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      {
        "name": "Maricopa County Industrial Development Authority, Series 2026 D",
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      {
        "name": "California Community Choice Financing Authority, Series F",
        "value": "10814631.00",
        "weight": "0.00345328",
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      {
        "name": "Chicago Midway International Airport, Series 2023A",
        "value": "10810245.00",
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      },
      {
        "name": "WA ST HLTH CAR 5% 10/1/2030",
        "value": "10759831.00",
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      }
    ],
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        "name": "MFS Institutional Money Market Portfolio, Class A",
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      {
        "name": "MARYLAND ST ECON DEV CORP LEASE REVENUE",
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      {
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      {
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      },
      {
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      {
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      {
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      {
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      {
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      {
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      {
        "name": "WASHINGTON SUBURBAN SANITARY COMMISSION",
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      {
        "name": "COUNTY OF BALTIMORE MD",
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      {
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      {
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      {
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        "name": "Maryland Health & Higher Educational Facilities Authority",
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      {
        "name": "Maryland Community Development Administration Local Government Infrastructure",
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      {
        "name": "MD CMNTY DEV-D-1",
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      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2018, RB",
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      {
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      {
        "name": "County of Montgomery",
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      {
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        "name": "Maryland Health & Higher Educational Facilities Authority",
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      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "1081998.20",
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      },
      {
        "name": "MD TRANSPRTN-A-REF",
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        "name": "Maryland Department of Housing & Community Development, Series 2024 E",
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        "name": "MD ECON DEV CORP-A",
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      {
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      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2025, RB",
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        "name": "Maryland Stadium Authority Sports Entertainment Facilities Revenue, Series 2023 A",
        "value": "1034419.30",
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      {
        "name": "State of Maryland Department of Transportation, Series 2024 A",
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      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL MARYLAND HEALTH & HIGHER EDUCATIONAL FACILITIES AU",
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      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
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      {
        "name": "Maryland Department of Housing & Community Development, Series 2025 D",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-015580",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/63075/000207169126015580/0002071691-26-015580-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-011429",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011429/0002071691-26-011429-index.htm"
    }
  ]
}