{
  "page": "compare",
  "query": {
    "a": "MMDIX",
    "b": "BIAMX"
  },
  "retrieved_at": "2026-07-07T17:36:17+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 Maryland Municipal Bond Fund",
    "ticker": "MMDIX",
    "slug": "MMDIX",
    "series_id": "S000002533",
    "html_url": "https://fundwatcher.app/funds/MMDIX/"
  },
  "fund_b": {
    "name": "Brown Advisory Maryland Bond Fund",
    "ticker": "BIAMX",
    "slug": "BIAMX",
    "series_id": "S000038486",
    "html_url": "https://fundwatcher.app/funds/BIAMX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.05612690869440094013394529679",
    "coverage_b_by_a": "0.05612690869440094013394529679",
    "shared_count": 12,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "5117103.28",
        "weight": "0.03287827",
        "shared": false
      },
      {
        "name": "MARYLAND ST ECON DEV CORP LEASE REVENUE",
        "value": "2066416.60",
        "weight": "0.01327708",
        "shared": false
      },
      {
        "name": "Maryland Economic Development Corp., Series 2024",
        "value": "1956308.20",
        "weight": "0.01256962",
        "shared": false
      },
      {
        "name": "Montgomery (County of), MD, Series 2017, GO Bonds",
        "value": "1900000.00",
        "weight": "0.01220783",
        "shared": true
      },
      {
        "name": "MARYLAND ST STD 5% 5/1/2035",
        "value": "1785164.72",
        "weight": "0.01146999",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "1727325.78",
        "weight": "0.01109837",
        "shared": false
      },
      {
        "name": "County of Prince George's, Series 2025 A",
        "value": "1607726.55",
        "weight": "0.01032992",
        "shared": false
      },
      {
        "name": "Washington Metropolitan Area Transit Authority Dedicated",
        "value": "1607187.60",
        "weight": "0.01032646",
        "shared": false
      },
      {
        "name": "Maryland Stadium Authority, Series 2024",
        "value": "1571792.40",
        "weight": "0.01009904",
        "shared": false
      },
      {
        "name": "County of Anne Arundel, Series 2025",
        "value": "1562597.40",
        "weight": "0.01003996",
        "shared": false
      },
      {
        "name": "MD HLTH & HGR EDL-A",
        "value": "1561890.15",
        "weight": "0.01003541",
        "shared": true
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority",
        "value": "1554150.45",
        "weight": "0.00998568",
        "shared": false
      },
      {
        "name": "PRINCE GEO COP 5% 10/1/48",
        "value": "1524666.75",
        "weight": "0.00979625",
        "shared": false
      },
      {
        "name": "Maryland Community Development Administration, Series 2025 F-1",
        "value": "1506350.25",
        "weight": "0.00967856",
        "shared": false
      },
      {
        "name": "MARYLAND STADIUM AUTHORITY",
        "value": "1492435.35",
        "weight": "0.00958915",
        "shared": false
      },
      {
        "name": "WASHINGTON SUBURBAN SANITARY COMMISSION",
        "value": "1461898.35",
        "weight": "0.00939295",
        "shared": false
      },
      {
        "name": "COUNTY OF BALTIMORE MD",
        "value": "1457850.60",
        "weight": "0.00936694",
        "shared": false
      },
      {
        "name": "County of Howard",
        "value": "1424096.70",
        "weight": "0.00915007",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "1406792.17",
        "weight": "0.00903888",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority, Series 2004",
        "value": "1396223.21",
        "weight": "0.00897098",
        "shared": false
      },
      {
        "name": "County of Anne Arundel, Series 2023",
        "value": "1393211.60",
        "weight": "0.00895163",
        "shared": false
      },
      {
        "name": "City of Baltimore, Series 2019 A",
        "value": "1392087.02",
        "weight": "0.00894440",
        "shared": false
      },
      {
        "name": "Maryland Community Development Administration Department of Housing and Community Development, Residential Revenue Bonds, Taxable Series 2019D",
        "value": "1391971.66",
        "weight": "0.00894366",
        "shared": false
      },
      {
        "name": "MARYLAND ST STA 4% 6/1/2046",
        "value": "1314577.29",
        "weight": "0.00844639",
        "shared": false
      },
      {
        "name": "MARYLAND HEALTH & HIGHER EDUCATIONAL FACILITIES AUTHORITY",
        "value": "1288038.33",
        "weight": "0.00827587",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority",
        "value": "1260651.72",
        "weight": "0.00809990",
        "shared": false
      },
      {
        "name": "MONTGOMERY CNTY MD REVENUE REGD B/E 5.00000000",
        "value": "1240317.19",
        "weight": "0.00796925",
        "shared": false
      },
      {
        "name": "Maryland Community Development Administration Local Government Infrastructure",
        "value": "1230218.13",
        "weight": "0.00790436",
        "shared": false
      },
      {
        "name": "MD CMNTY DEV-D-1",
        "value": "1190841.13",
        "weight": "0.00765136",
        "shared": false
      },
      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2018, RB",
        "value": "1155596.68",
        "weight": "0.00742491",
        "shared": false
      },
      {
        "name": "MD HEFA 4% 7/1/2048",
        "value": "1108365.50",
        "weight": "0.00712144",
        "shared": false
      },
      {
        "name": "County of Montgomery",
        "value": "1107250.70",
        "weight": "0.00711428",
        "shared": false
      },
      {
        "name": "MD CMNTY DEPT ADMIN-B",
        "value": "1097910.15",
        "weight": "0.00705426",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority",
        "value": "1094371.76",
        "weight": "0.00703153",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "1081998.20",
        "weight": "0.00695203",
        "shared": false
      },
      {
        "name": "MD TRANSPRTN-A-REF",
        "value": "1080306.40",
        "weight": "0.00694116",
        "shared": false
      },
      {
        "name": "Montgomery County Housing Opportunities Commission, Series 2023 C",
        "value": "1076666.80",
        "weight": "0.00691777",
        "shared": false
      },
      {
        "name": "Maryland Department of Housing & Community Development, Series 2024 E",
        "value": "1076506.43",
        "weight": "0.00691674",
        "shared": false
      },
      {
        "name": "MD ECON DEV CORP-A",
        "value": "1072393.30",
        "weight": "0.00689031",
        "shared": false
      },
      {
        "name": "County of Prince George's",
        "value": "1040425.00",
        "weight": "0.00668491",
        "shared": false
      },
      {
        "name": "MARYLAND ST ECON DEV CORP AIR CARGO REVENUE",
        "value": "1040054.84",
        "weight": "0.00668253",
        "shared": false
      },
      {
        "name": "Washington Metropolitan Area Transit Authority, Series 2025, RB",
        "value": "1038645.70",
        "weight": "0.00667348",
        "shared": false
      },
      {
        "name": "Maryland Stadium Authority Sports Entertainment Facilities Revenue, Series 2023 A",
        "value": "1034419.30",
        "weight": "0.00664632",
        "shared": false
      },
      {
        "name": "State of Maryland Department of Transportation, Series 2024 A",
        "value": "1032954.50",
        "weight": "0.00663691",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL MARYLAND HEALTH & HIGHER EDUCATIONAL FACILITIES AU",
        "value": "1031303.10",
        "weight": "0.00662630",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "1025953.80",
        "weight": "0.00659193",
        "shared": false
      },
      {
        "name": "Maryland Department of Housing & Community Development, Series 2025 D",
        "value": "1024100.00",
        "weight": "0.00658002",
        "shared": false
      },
      {
        "name": "State of Maryland Department of Transportation, Series 2024 A",
        "value": "1023701.30",
        "weight": "0.00657746",
        "shared": false
      },
      {
        "name": "MARYLAND ST STA 4% 6/1/2036",
        "value": "1022381.10",
        "weight": "0.00656898",
        "shared": false
      },
      {
        "name": "Montgomery County Housing Opportunities Commission, Series 2025A",
        "value": "1021211.30",
        "weight": "0.00656146",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "State of Maryland",
        "value": "7452768.00",
        "weight": "0.04300261",
        "shared": false
      },
      {
        "name": "MD EDC STUD HSG 5% 6/1/2035",
        "value": "6732054.76",
        "weight": "0.03884408",
        "shared": true
      },
      {
        "name": "County of Frederick MD",
        "value": "6587472.27",
        "weight": "0.03800984",
        "shared": false
      },
      {
        "name": "County of Frederick MD",
        "value": "5821964.42",
        "weight": "0.03359284",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 0% MT",
        "value": "5646199.35",
        "weight": "0.03257868",
        "shared": false
      },
      {
        "name": "MD HLTH & HGR EDL-A",
        "value": "5211154.50",
        "weight": "0.03006846",
        "shared": true
      },
      {
        "name": "Maryland Stadium Authority",
        "value": "5146427.50",
        "weight": "0.02969498",
        "shared": true
      },
      {
        "name": "County of Baltimore MD",
        "value": "5091446.50",
        "weight": "0.02937774",
        "shared": false
      },
      {
        "name": "Miami-Dade County Expressway Authority",
        "value": "5042363.00",
        "weight": "0.02909453",
        "shared": false
      },
      {
        "name": "MARYLAND HEALTH & HIGHER EDUCATIONAL FACILITIES AUTHORITY",
        "value": "5004056.50",
        "weight": "0.02887350",
        "shared": false
      },
      {
        "name": "Maryland Economic Development Corp., Series 2025",
        "value": "4994792.00",
        "weight": "0.02882004",
        "shared": true
      },
      {
        "name": "WASHINGTON SUBURBAN SANITARY COMMISSION",
        "value": "4843786.35",
        "weight": "0.02794874",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL REGD B/E 5.00000000",
        "value": "4373471.39",
        "weight": "0.02523501",
        "shared": true
      },
      {
        "name": "MARYLAND ST ECON DEV CORP SPL REGD B/E 4.50000000",
        "value": "4253572.80",
        "weight": "0.02454320",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL REGD V/R B/E 5.00000000",
        "value": "4062321.60",
        "weight": "0.02343967",
        "shared": false
      },
      {
        "name": "STATE OF MARYLAND DEPARTMENT OF TRANSPORTATION",
        "value": "4060297.20",
        "weight": "0.02342799",
        "shared": false
      },
      {
        "name": "MD HLTH HGR AUTH-B",
        "value": "4011152.25",
        "weight": "0.02314442",
        "shared": false
      },
      {
        "name": "Maryland Community Development Administration",
        "value": "3993695.08",
        "weight": "0.02304370",
        "shared": false
      },
      {
        "name": "Maryland Stadium Authority",
        "value": "3769327.08",
        "weight": "0.02174909",
        "shared": false
      },
      {
        "name": "FRST AM-GV OB-Z",
        "value": "3673662.12",
        "weight": "0.02119710",
        "shared": false
      },
      {
        "name": "NY TRANSPRTN DEV -AMT",
        "value": "3291357.30",
        "weight": "0.01899119",
        "shared": false
      },
      {
        "name": "County of Montgomery MD",
        "value": "3188533.59",
        "weight": "0.01839790",
        "shared": false
      },
      {
        "name": "County of Baltimore MD",
        "value": "3025723.40",
        "weight": "0.01745848",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "2975000.00",
        "weight": "0.01716581",
        "shared": false
      },
      {
        "name": "MD EDC 0% 10/1/2036 MT",
        "value": "2654773.68",
        "weight": "0.01531809",
        "shared": false
      },
      {
        "name": "ST LUKE'S HOSPITAL OBLIGATED GROUP FRN 08-15-38",
        "value": "2473544.72",
        "weight": "0.01427240",
        "shared": false
      },
      {
        "name": "TX TRANSPRTN COMM",
        "value": "2303092.28",
        "weight": "0.01328889",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "2270000.00",
        "weight": "0.01309794",
        "shared": false
      },
      {
        "name": "CITY OF HYATTSVILLE MD",
        "value": "2067106.92",
        "weight": "0.01192725",
        "shared": false
      },
      {
        "name": "COUNTY OF FREDERICK MD",
        "value": "2063398.62",
        "weight": "0.01190585",
        "shared": false
      },
      {
        "name": "GAITHERSBURG MD ECON DEV REVEN REGD B/E 5.00000000",
        "value": "2029770.60",
        "weight": "0.01171181",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority, Series 2017 A",
        "value": "1962407.00",
        "weight": "0.01132313",
        "shared": true
      },
      {
        "name": "MARYLAND HEALTH & HIGHER EDUCATIONAL FACILITIES AUTHORITY",
        "value": "1956646.70",
        "weight": "0.01128989",
        "shared": false
      },
      {
        "name": "County of Anne Arundel, Series 2025",
        "value": "1945491.20",
        "weight": "0.01122552",
        "shared": true
      },
      {
        "name": "Maryland Community Development Administration",
        "value": "1842833.23",
        "weight": "0.01063318",
        "shared": false
      },
      {
        "name": "HEALTHRIGHT 360 5.0% 11-01-39",
        "value": "1761603.38",
        "weight": "0.01016448",
        "shared": false
      },
      {
        "name": "Montgomery (County of), MD, Series 2017, GO Bonds",
        "value": "1600000.00",
        "weight": "0.00923203",
        "shared": true
      },
      {
        "name": "FRANKLIN CNTY OH HLTH CARE FACS REVENUE",
        "value": "1550502.98",
        "weight": "0.00894643",
        "shared": false
      },
      {
        "name": "Metropolitan Washington D.C. Airports Authority, Airport System Revenue Bonds, Refunding Series 2019A",
        "value": "1543086.90",
        "weight": "0.00890364",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "1530410.10",
        "weight": "0.00883050",
        "shared": false
      },
      {
        "name": "CITY OF BALTIMORE MD HARBOR POINT SPECIAL TAXING DISTRICT 4.5% 06-01-33",
        "value": "1479258.49",
        "weight": "0.00853535",
        "shared": false
      },
      {
        "name": "County of Frederick MD",
        "value": "1456063.67",
        "weight": "0.00840151",
        "shared": false
      },
      {
        "name": "MARYLAND ST ECON DEV CORP STUD REGD B/E 4.00000000",
        "value": "1399242.75",
        "weight": "0.00807366",
        "shared": false
      },
      {
        "name": "MARYLAND ST HLTH & HGR EDUCTNL REGD B/E 5.00000000",
        "value": "1325416.60",
        "weight": "0.00764768",
        "shared": false
      },
      {
        "name": "Frederick County, Maryland, Tax Increment and Special Tax B Limited Obligation Bonds, Oakdale-Lake Linganore Project, Series 2019",
        "value": "1311762.90",
        "weight": "0.00756890",
        "shared": true
      },
      {
        "name": "Maryland Community Development Administration",
        "value": "1305238.08",
        "weight": "0.00753125",
        "shared": false
      },
      {
        "name": "STATE OF MARYLAND DEPARTMENT OF TRANSPORTATION",
        "value": "1283196.75",
        "weight": "0.00740407",
        "shared": false
      },
      {
        "name": "CITY OF BALTIMORE MD",
        "value": "1251844.88",
        "weight": "0.00722317",
        "shared": false
      },
      {
        "name": "Maryland Community Development Administration",
        "value": "1226913.73",
        "weight": "0.00707932",
        "shared": false
      },
      {
        "name": "Maryland Health & Higher Educational Facilities Authority, Series 2017 A",
        "value": "1207992.96",
        "weight": "0.00697014",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "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"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000894189-26-016022",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1548609/000089418926016022/0000894189-26-016022-index.htm"
    }
  ]
}