{
  "page": "compare",
  "query": {
    "a": "MMICX",
    "b": "FSMUX"
  },
  "retrieved_at": "2026-07-07T19:07:18+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 Income Fund",
    "ticker": "MMICX",
    "slug": "MMICX",
    "series_id": "S000002536",
    "html_url": "https://fundwatcher.app/funds/MMICX/"
  },
  "fund_b": {
    "name": "Strategic Advisers Municipal Bond Fund",
    "ticker": "FSMUX",
    "slug": "FSMUX",
    "series_id": "S000072234",
    "html_url": "https://fundwatcher.app/funds/FSMUX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1515530096854340125067147459",
    "coverage_b_by_a": "0.1515530096854340125067147459",
    "shared_count": 1657,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "168421496.15",
        "weight": "0.02436056",
        "shared": false
      },
      {
        "name": "Black Belt Energy Gas District",
        "value": "36524672.64",
        "weight": "0.00528294",
        "shared": false
      },
      {
        "name": "TEXAS ST MUNI GAS ACQUISITION& TEXAS MUNICIPAL GAS ACQUISITION & SUPPLY CORP IV",
        "value": "32484690.97",
        "weight": "0.00469860",
        "shared": true
      },
      {
        "name": "PRINCETON TX INDEP SCH DIST",
        "value": "29636666.36",
        "weight": "0.00428666",
        "shared": false
      },
      {
        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.25% 6/30/60@",
        "value": "29151826.25",
        "weight": "0.00421653",
        "shared": true
      },
      {
        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.13% 6/30/60@",
        "value": "29039960.93",
        "weight": "0.00420035",
        "shared": true
      },
      {
        "name": "New Hampshire Business Finance Authority, Series 2023A",
        "value": "28620989.28",
        "weight": "0.00413975",
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      },
      {
        "name": "California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB",
        "value": "27756824.19",
        "weight": "0.00401476",
        "shared": true
      },
      {
        "name": "BLACK BELT ENGY GAS-C",
        "value": "25083362.48",
        "weight": "0.00362807",
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      },
      {
        "name": "NOVANT HEALTH OBLIGATED GROUP 5.5% 06-01-50",
        "value": "24283162.58",
        "weight": "0.00351233",
        "shared": true
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "23202443.77",
        "weight": "0.00335601",
        "shared": true
      },
      {
        "name": "VIRGINIA ST HSG DEV AUTH",
        "value": "21825945.31",
        "weight": "0.00315691",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT AG 5.00000000",
        "value": "21811357.13",
        "weight": "0.00315480",
        "shared": true
      },
      {
        "name": "QUEEN CREEK AZ COPS",
        "value": "21660973.28",
        "weight": "0.00313305",
        "shared": true
      },
      {
        "name": "Connecticut State Health & Educational Facilities Authority, Series A",
        "value": "21380008.00",
        "weight": "0.00309241",
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      },
      {
        "name": "METROCARE SVC REV",
        "value": "21222926.80",
        "weight": "0.00306969",
        "shared": true
      },
      {
        "name": "NY TRANSPRTN DEV CORP",
        "value": "20732607.80",
        "weight": "0.00299877",
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      },
      {
        "name": "MD HLTH HGR AUTH-A",
        "value": "20554628.00",
        "weight": "0.00297303",
        "shared": false
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      {
        "name": "WV HOSP 5.375% 9/1/2053",
        "value": "20473933.37",
        "weight": "0.00296136",
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      },
      {
        "name": "TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR",
        "value": "20436540.28",
        "weight": "0.00295595",
        "shared": true
      },
      {
        "name": "JEA WTR & SWR REV-A",
        "value": "20427563.65",
        "weight": "0.00295465",
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      },
      {
        "name": "Black Belt Energy Gas District, Series 2025 A",
        "value": "20107281.45",
        "weight": "0.00290833",
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      },
      {
        "name": "Delaware State Housing Authority, Series BDS 2023",
        "value": "19927531.01",
        "weight": "0.00288233",
        "shared": true
      },
      {
        "name": "TX PRIVATE ACTIVITY",
        "value": "19277807.52",
        "weight": "0.00278835",
        "shared": true
      },
      {
        "name": "Energy Southeast Cooperative District, Alabama, Energy Supply Revenue Bonds, Series 2025B",
        "value": "19241087.03",
        "weight": "0.00278304",
        "shared": true
      },
      {
        "name": "Alachua County Health Facilities Authority, Series 2025 A",
        "value": "19131332.09",
        "weight": "0.00276716",
        "shared": false
      },
      {
        "name": "Southeast Energy Authority, Alabama, Commodity Supply Revenue Bonds, Project 5, Series 2023A",
        "value": "19051853.45",
        "weight": "0.00275567",
        "shared": true
      },
      {
        "name": "TOWER HEALTH OBLIGATED GROUP 5.0% 06-30-39",
        "value": "18315498.74",
        "weight": "0.00264916",
        "shared": true
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "18310997.25",
        "weight": "0.00264851",
        "shared": true
      },
      {
        "name": "SPOKANE CNTY WA ARPT REVENUE",
        "value": "18295917.76",
        "weight": "0.00264633",
        "shared": false
      },
      {
        "name": "BLACK BELT ENERGY GAS VAR",
        "value": "18134798.50",
        "weight": "0.00262303",
        "shared": false
      },
      {
        "name": "CHICAGO ILLIN 6% 4/1/2046",
        "value": "17999717.26",
        "weight": "0.00260349",
        "shared": true
      },
      {
        "name": "California (State of) Housing Finance Agency (Social Certificates), Series 2023-1, RB",
        "value": "17903581.23",
        "weight": "0.00258958",
        "shared": true
      },
      {
        "name": "Fishers Town Hall Building Corp., Series 2023 A, RB",
        "value": "17353109.79",
        "weight": "0.00250996",
        "shared": true
      },
      {
        "name": "MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000",
        "value": "17214293.50",
        "weight": "0.00248988",
        "shared": false
      },
      {
        "name": "Maryland Department of Housing & Community Development, Series 2024 E",
        "value": "17179480.78",
        "weight": "0.00248485",
        "shared": false
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      {
        "name": "WISCONSIN ST HT 4% 4/1/2040",
        "value": "16827152.94",
        "weight": "0.00243389",
        "shared": true
      },
      {
        "name": "New Hampshire Business Finance Authority, Series 2024A",
        "value": "16753590.49",
        "weight": "0.00242325",
        "shared": true
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.00000000",
        "value": "16680576.77",
        "weight": "0.00241269",
        "shared": true
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2025B",
        "value": "16505537.96",
        "weight": "0.00238737",
        "shared": true
      },
      {
        "name": "COLORADO ST HLTH FACS AUTH REV REGD B/E 4.00000000",
        "value": "16297175.41",
        "weight": "0.00235723",
        "shared": true
      },
      {
        "name": "ORANGE HLTH FACS-A",
        "value": "15910063.75",
        "weight": "0.00230124",
        "shared": true
      },
      {
        "name": "Jefferson (County of), AL, Series 2024, Ref. Revenue Wts.",
        "value": "15783655.47",
        "weight": "0.00228295",
        "shared": true
      },
      {
        "name": "SAN ANTONIO WTR 5.25% 5/15/2052",
        "value": "15584064.00",
        "weight": "0.00225409",
        "shared": true
      },
      {
        "name": "Travis County Healthcare District",
        "value": "15503484.00",
        "weight": "0.00224243",
        "shared": false
      },
      {
        "name": "Energy Southeast A Cooperative District, Series B-1",
        "value": "15438008.00",
        "weight": "0.00223296",
        "shared": true
      },
      {
        "name": "MICHIGAN ST HSG DEV AUTH RENTAL HSG REVENUE",
        "value": "15431357.06",
        "weight": "0.00223200",
        "shared": true
      },
      {
        "name": "FRETE ML-15 TRUST",
        "value": "15402544.35",
        "weight": "0.00222783",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series C",
        "value": "15398843.24",
        "weight": "0.00222730",
        "shared": true
      },
      {
        "name": "NY NYCDEV 5 11/15/2044",
        "value": "15300419.22",
        "weight": "0.00221306",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "Allspring Municipal Bond Admin",
        "value": "865145655.00",
        "weight": "0.06200385",
        "shared": false
      },
      {
        "name": "Vanguard Long-Term Tax-Exempt Adm",
        "value": "694526934.51",
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      {
        "name": "Franklin Federal Tax Free Income R6",
        "value": "656439810.79",
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        "shared": false
      },
      {
        "name": "MONEY MARKET FUND",
        "value": "482309091.20",
        "weight": "0.03456646",
        "shared": false
      },
      {
        "name": "ISHARES NATIONAL MUNI BOND ETF ISHARES NATIONAL MUNI BOND E",
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        "shared": false
      },
      {
        "name": "VANGUARD TAX-EXM",
        "value": "310440040.35",
        "weight": "0.02224883",
        "shared": false
      },
      {
        "name": "DWS Managed Municipal Bond S",
        "value": "306113111.12",
        "weight": "0.02193872",
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      },
      {
        "name": "FIDELITY SAI ENHANCED MUNICIPAL INCOME FUND",
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        "weight": "0.01858089",
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      },
      {
        "name": "BlackRock National Municipal Inv A",
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        "weight": "0.01856254",
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      {
        "name": "Eaton Vance National Municipal Income I",
        "value": "243829535.70",
        "weight": "0.01747494",
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      {
        "name": "American High-Income Municipal Bond F-2",
        "value": "155640780.16",
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      },
      {
        "name": "Fidelity Municipal Cash Central Fund",
        "value": "80023976.23",
        "weight": "0.00573521",
        "shared": false
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      {
        "name": "Invesco Government & Agency Portfolio, Institutional Class",
        "value": "40242334.91",
        "weight": "0.00288412",
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      {
        "name": "MAIN STR NAT GA 4% 07/01/2052 MT",
        "value": "37437239.06",
        "weight": "0.00268308",
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      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 4.75000000",
        "value": "33883883.53",
        "weight": "0.00242841",
        "shared": true
      },
      {
        "name": "OH BUCGEN 5 06/01/2055",
        "value": "32929474.32",
        "weight": "0.00236001",
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      },
      {
        "name": "SOUTHEAST ENERGY-E",
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        "weight": "0.00225687",
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      {
        "name": "TN TNSUTL 5 12/01/2035",
        "value": "28499240.13",
        "weight": "0.00204250",
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      },
      {
        "name": "Public Energy Auth. of Kentucky Gas Supply Rev. Refg. C",
        "value": "20993906.34",
        "weight": "0.00150461",
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      {
        "name": "California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB",
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        "weight": "0.00145377",
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      },
      {
        "name": "Puerto Rico Commonwealth Aqueduct & Sewer Authority, Series A",
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      {
        "name": "CHICAGO ILLIN 6% 4/1/2046",
        "value": "18890444.64",
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      },
      {
        "name": "MUNIBOND",
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      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "18207752.42",
        "weight": "0.00130493",
        "shared": true
      },
      {
        "name": "MAIN STR NAT GA(RCC) 5% 9/1/30MT 53",
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        "weight": "0.00118420",
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      {
        "name": "TX TTFTRN 5.5 10/01/2055",
        "value": "16370516.04",
        "weight": "0.00117325",
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      {
        "name": "TN TNSUTL 5 11/01/2034",
        "value": "16071892.68",
        "weight": "0.00115185",
        "shared": false
      },
      {
        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.13% 6/30/60@",
        "value": "15961418.43",
        "weight": "0.00114393",
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      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds Cooperative District Energy Supply Series 2024C",
        "value": "15885729.16",
        "weight": "0.00113851",
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      {
        "name": "NEW YORK ST URBAN DEV CORP SALES TAX REVENUE",
        "value": "15696810.00",
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      {
        "name": "NY NYEFAC 07/01/2056",
        "value": "15553968.75",
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      {
        "name": "San Francisco City & County Airport Comm-San Francisco International Airport",
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      {
        "name": "LOWER AL GAS DT-A-REF",
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      {
        "name": "State of Illinois, Series D",
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      {
        "name": "TOBACCO SETTLEMENT FING CORP N TOBGEN 06/46 FIXED 5",
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      },
      {
        "name": "WI PUBTRN 5.75 12/31/2065",
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      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT 5.25000000",
        "value": "14489270.33",
        "weight": "0.00103843",
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      },
      {
        "name": "STATE OF ILLINOIS MCCORMICK PLACE EXPANSION PROJECT FUND 4.0% 06-15-52",
        "value": "14479978.80",
        "weight": "0.00103776",
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      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.75000000",
        "value": "14373169.96",
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      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022",
        "value": "14359374.05",
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      },
      {
        "name": "MAIN STR NAT GA 4% 9/1/2052",
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      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds, Cooperative District Energy Supply Series 2025B",
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      },
      {
        "name": "MAIN STR NAT GA 5% MT",
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        "weight": "0.00101934",
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      },
      {
        "name": "Black Belt Energy Gas District, Series D-1",
        "value": "14178203.36",
        "weight": "0.00101613",
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      },
      {
        "name": "TX TXSUTL 01/01/2055",
        "value": "13568832.68",
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      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000",
        "value": "13388709.79",
        "weight": "0.00095955",
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      },
      {
        "name": "NEW YORK ST DO 5% 3/15/2041",
        "value": "13335564.04",
        "weight": "0.00095574",
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      },
      {
        "name": "California (State of) Community Choice Financing Authority (Clean Energy) (Green Bonds), Series 2024, RB",
        "value": "13108509.88",
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      },
      {
        "name": "California Community Choice Financing Authority, Series 2025G",
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      {
        "name": "NY TRNSPRTN DEV CRP-A",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-011438",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/751656/000207169126011438/0002071691-26-011438-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002694",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1364924/000003540226002694/0000035402-26-002694-index.htm"
    }
  ]
}