{
  "page": "compare",
  "query": {
    "a": "FSMNX",
    "b": "FDMMX"
  },
  "retrieved_at": "2026-07-07T16:17:02+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": "Fidelity SAI Municipal Income Fund",
    "ticker": "FSMNX",
    "slug": "FSMNX",
    "series_id": "S000062002",
    "html_url": "https://fundwatcher.app/funds/FSMNX/"
  },
  "fund_b": {
    "name": "Fidelity Massachusetts Municipal Income Fund",
    "ticker": "FDMMX",
    "slug": "FDMMX",
    "series_id": "S000007114",
    "html_url": "https://fundwatcher.app/funds/FDMMX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.08790559558563222802847039986",
    "coverage_b_by_a": "0.08790559558563222802847039986",
    "shared_count": 17,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "Fidelity Municipal Cash Central Fund",
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        "weight": "0.07778582",
        "shared": true
      },
      {
        "name": "SOUTHEAST ENERGY-E",
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      },
      {
        "name": "TN MNVAPT 5.25 07/01/2051",
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        "shared": false
      },
      {
        "name": "Black Belt Energy Gas District",
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      },
      {
        "name": "NJ TRANSPRTN TRUST-BB",
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      {
        "name": "NY MTA TRANSP 5% 11/15/2033",
        "value": "25919191.28",
        "weight": "0.00743273",
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      },
      {
        "name": "BLACK BELT ENERGY GAS VAR",
        "value": "22743878.79",
        "weight": "0.00652216",
        "shared": false
      },
      {
        "name": "NYS TWY PIT 5% 3/15/2042",
        "value": "21848290.00",
        "weight": "0.00626533",
        "shared": false
      },
      {
        "name": "MUNIBOND",
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      },
      {
        "name": "TN TNSUTL 5 12/01/2035",
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      },
      {
        "name": "MUNIBOND",
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        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority",
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      },
      {
        "name": "LOWER AL GAS DT-A-REF",
        "value": "17818624.82",
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      },
      {
        "name": "NY CITY TRANS FIN-F-1",
        "value": "17467162.53",
        "weight": "0.00500898",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 4% 07/01/2052 MT",
        "value": "16919819.49",
        "weight": "0.00485202",
        "shared": false
      },
      {
        "name": "NYC WTR 5.50% 6/15/2056",
        "value": "16222416.99",
        "weight": "0.00465203",
        "shared": false
      },
      {
        "name": "North Carolina Turnpike Authority, Series A",
        "value": "16096096.83",
        "weight": "0.00461580",
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      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds Cooperative District Energy Supply Series 2024C",
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      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "15701338.33",
        "weight": "0.00450260",
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      },
      {
        "name": "Black Belt Energy Gas District (The) (Gas), Series 2022 F, RB",
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      {
        "name": "Miami-Dade (County of), FL, Series 2025 A, RB",
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      {
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        "value": "15173698.43",
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      },
      {
        "name": "W VIRGINIA ST H-SER B",
        "value": "14947136.07",
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      },
      {
        "name": "WA ST 5% 2/1/2030",
        "value": "13840622.61",
        "weight": "0.00396901",
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      },
      {
        "name": "NY STATE UR D 5% 3/15/2040",
        "value": "12863248.80",
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        "shared": false
      },
      {
        "name": "CHICAGO IL BRD OF EDU REGD OID B/E 6.00000000",
        "value": "12774007.50",
        "weight": "0.00366314",
        "shared": false
      },
      {
        "name": "SAN ANTONIO TX ELEC   GAS REVE SANUTL 02/49 FIXED 5.25",
        "value": "12226734.20",
        "weight": "0.00350620",
        "shared": false
      },
      {
        "name": "SAN ANTONIO TX ELEC & GAS REVENUE",
        "value": "12170568.30",
        "weight": "0.00349010",
        "shared": false
      },
      {
        "name": "FAYETTE COUNTY 5.25% 6/1/2044",
        "value": "11955302.13",
        "weight": "0.00342837",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
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        "weight": "0.00335450",
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      },
      {
        "name": "Pima County Industrial Development Authority, Arizona, Revenue Bonds, Tucson Medical Center, Series 2021A",
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      },
      {
        "name": "NYC WTR 5.25% 6/15/2047",
        "value": "11119267.61",
        "weight": "0.00318862",
        "shared": false
      },
      {
        "name": "HOUSTON TX REGD B/E 5.25000000",
        "value": "11099646.85",
        "weight": "0.00318299",
        "shared": false
      },
      {
        "name": "New York City Transitional Finance Authority Future Tax Secured Revenue, Series 2025, RB",
        "value": "10837320.68",
        "weight": "0.00310777",
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      {
        "name": "NE CENPWR 08/01/2055",
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      },
      {
        "name": "FEDERAL HOME LOAN MTGE CORP MF REGD N/C V/R B/E 4.77310000",
        "value": "10798990.80",
        "weight": "0.00309678",
        "shared": false
      },
      {
        "name": "SALES TAX SECURITIZTN",
        "value": "10676544.86",
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      },
      {
        "name": "NYS DORM PIT 5% 3/15/2047",
        "value": "10615738.99",
        "weight": "0.00304423",
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      },
      {
        "name": "OHIO ST UNIV GR 5.25% 12/1/2046",
        "value": "10607026.00",
        "weight": "0.00304173",
        "shared": false
      },
      {
        "name": "PORT NY NJ 5% 1/15/2047 @",
        "value": "10594964.55",
        "weight": "0.00303827",
        "shared": false
      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds, Cooperative District Energy Supply Series 2025B",
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        "weight": "0.00301399",
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      },
      {
        "name": "SOUTHEAST ENERGY-D",
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      },
      {
        "name": "NYC TRANSITIONAL-J-1",
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      },
      {
        "name": "CASTAIC LK WTR AMBAC 0% 8/1/2026",
        "value": "10356296.88",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/52",
        "value": "10266268.00",
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      },
      {
        "name": "CHICAGO IL BRD OF EDU",
        "value": "9816297.58",
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      },
      {
        "name": "COLUMBUS REGL ARPT-A",
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      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY S REGD OID B/E 6.50000000",
        "value": "9444602.27",
        "weight": "0.00270839",
        "shared": true
      },
      {
        "name": "NJ TPK 5% 1/1/2030",
        "value": "9438431.91",
        "weight": "0.00270662",
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    ],
    "b_top": [
      {
        "name": "Fidelity Municipal Cash Central Fund",
        "value": "143226612.28",
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        "shared": true
      },
      {
        "name": "MA ST 5% 9/1/2049",
        "value": "51634740.00",
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      },
      {
        "name": "COMMONWLTH OF 5% 12/1/2037",
        "value": "39375733.20",
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      },
      {
        "name": "MA ST 5% 11/1/52",
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      {
        "name": "MA TPK CAB-SR-SER A",
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      },
      {
        "name": "MA ST 3% 2/1/2048",
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      {
        "name": "MA ST 5% 11/1/2050",
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      },
      {
        "name": "MA ST 5.25% 1/1/2033",
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      },
      {
        "name": "COMMONWLTH OF 5% 12/1/2036",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/2053",
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      },
      {
        "name": "MA ST SPL OB DE 5.50% NATL/FGIC 1/1/2030",
        "value": "18998640.70",
        "weight": "0.01059077",
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      },
      {
        "name": "MASSACHUSETTS ST SPL OBLIG DEDICATED TAX REV FGIC",
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        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
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      },
      {
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      },
      {
        "name": "MA ST HSG FIN AGY-C2",
        "value": "16319780.80",
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      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH REGD B/E AMT 5.00000000",
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        "weight": "0.00908253",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/2044",
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      {
        "name": "MA ST TRANS REV 5% 6/1/2042",
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      },
      {
        "name": "MA ST TRANS REV 5.25% 6/1/2043",
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      },
      {
        "name": "MASS DFA SOUTHCST HLTH 4% 7/43",
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      },
      {
        "name": "BOSTON MA 5% 2/1/2039",
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      },
      {
        "name": "MA CL WTR TR 5% 2/1/2039",
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      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
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      },
      {
        "name": "MA TPK CAB-SR-SER A",
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      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
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      {
        "name": "MA PORT 5% 7/1/2038@",
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      {
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      },
      {
        "name": "MBTA SLS TAX 5.25% 7/1/2052",
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      },
      {
        "name": "MASS DEV FIN AGY-K",
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      {
        "name": "MA ED LN AUTH 5% 7/1/2030 @",
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      {
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      {
        "name": "MA DFA 5% 4/1/2033",
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      {
        "name": "MA ED LN AUTH 5% 7/1/2027 @",
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      },
      {
        "name": "MASSACHUSETTS ST SCH BLDG AUTH SALES TAX REVENUE",
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      {
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      {
        "name": "MA ST 5% 1/1/2049",
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        "value": "10077888.00",
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      },
      {
        "name": "Massachusetts (Commonwealth of), Series 2024, GO Bonds",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/2041",
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      },
      {
        "name": "MASSACHUSETTS ST PORT AUTH SPL FACS REVENUE",
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      },
      {
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      },
      {
        "name": "Massachusetts Development Finance Agency, Series 2024 U-1",
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      {
        "name": "MBTA SLS TAX 5.25% 7/1/2053",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/2047",
        "value": "8374790.40",
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      },
      {
        "name": "MA WTR 5% 8/1/42",
        "value": "7886186.92",
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      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY REVENUE",
        "value": "7871510.25",
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      },
      {
        "name": "MA ST TRANS REV 5% 6/1/2048",
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      },
      {
        "name": "MBTA SLS TAX 0% 7/1/2032",
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      },
      {
        "name": "MA CL WTR TR 5% 2/1/2037",
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      },
      {
        "name": "MASS DEVEL FIN 4% 7/1/2040",
        "value": "7458423.98",
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      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-003416",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/35315/000003540226003416/0000035402-26-003416-index.htm"
    },
    {
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      "accession_no": "0000035402-26-002005",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/357057/000003540226002005/0000035402-26-002005-index.htm"
    }
  ]
}