{
  "page": "compare",
  "query": {
    "a": "MFSM",
    "b": "FSMUX"
  },
  "retrieved_at": "2026-07-07T16:07:20+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 Active Intermediate Muni Bond ETF",
    "ticker": "MFSM",
    "slug": "MFSM",
    "series_id": "S000085668",
    "html_url": "https://fundwatcher.app/funds/MFSM/"
  },
  "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": "0.06070451978815784139892841442",
    "coverage_b_by_a": "0.06070451978815784139892841442",
    "shared_count": 76,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "State Street Navigator Securities Lending Portfolio II",
        "value": "3348853.41",
        "weight": "0.04555132",
        "shared": false
      },
      {
        "name": "ISHARES NATIONAL MUNI BOND ETF ISHARES NATIONAL MUNI BOND E",
        "value": "2946286.00",
        "weight": "0.04007557",
        "shared": true
      },
      {
        "name": "VANGUARD TAX-EXM",
        "value": "2946240.00",
        "weight": "0.04007494",
        "shared": true
      },
      {
        "name": "PASCO CNTY FL SOL WST DISP & RESOURCE RECOVERY SYS",
        "value": "751057.98",
        "weight": "0.01021594",
        "shared": false
      },
      {
        "name": "Kentucky Bond Development Corp., Series A",
        "value": "575936.10",
        "weight": "0.00783392",
        "shared": false
      },
      {
        "name": "CHERRY CREEK SD#5",
        "value": "575706.85",
        "weight": "0.00783080",
        "shared": false
      },
      {
        "name": "GTR ASHEVILLE REGL ARPT AUTH N REGD B/E AMT AG 5.25000000",
        "value": "549841.00",
        "weight": "0.00747897",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series F",
        "value": "548866.50",
        "weight": "0.00746572",
        "shared": true
      },
      {
        "name": "PENNSYLVANIA ST TURNPIKE COMMISSION TURNPIKE REVENUE",
        "value": "548835.85",
        "weight": "0.00746530",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT AG 5.50000000",
        "value": "545506.40",
        "weight": "0.00742001",
        "shared": false
      },
      {
        "name": "State of Minnesota 4.00% 08/01/2041",
        "value": "519783.60",
        "weight": "0.00707013",
        "shared": false
      },
      {
        "name": "NORTH ALLEGHENY PA SC",
        "value": "517393.05",
        "weight": "0.00703761",
        "shared": false
      },
      {
        "name": "NYC HSG DEV CORP-F-2",
        "value": "505958.35",
        "weight": "0.00688208",
        "shared": false
      },
      {
        "name": "SANTA NM 3.29% 12/10/2049 MT",
        "value": "504510.30",
        "weight": "0.00686238",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.00000000",
        "value": "502491.85",
        "weight": "0.00683493",
        "shared": false
      },
      {
        "name": "CALIFORNIA COMMUNITY VAR",
        "value": "488218.46",
        "weight": "0.00664078",
        "shared": true
      },
      {
        "name": "BLACK BELT ENERGY GAS DIST AL GAS PROJECT REVENUE",
        "value": "469192.35",
        "weight": "0.00638198",
        "shared": false
      },
      {
        "name": "Fulton (County of), GA Development Authority (Georgia Institute of Technology), Series 2019, RB",
        "value": "447686.46",
        "weight": "0.00608946",
        "shared": false
      },
      {
        "name": "HOUSTON TX ARPT SYS REVENUE REGD B/E AMT 5.25000000",
        "value": "444149.82",
        "weight": "0.00604135",
        "shared": false
      },
      {
        "name": "Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2025B",
        "value": "394264.45",
        "weight": "0.00536281",
        "shared": true
      },
      {
        "name": "PROVIDENCE RI PUBLIC BLDGS AUTH REVENUE",
        "value": "385263.04",
        "weight": "0.00524037",
        "shared": false
      },
      {
        "name": "ROCKLAND CNTY NY SOL WST MGMT AUTH",
        "value": "381496.80",
        "weight": "0.00518914",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "378781.37",
        "weight": "0.00515221",
        "shared": true
      },
      {
        "name": "Los Angeles (City of), CA Department of Airports (Los Angeles International Airport), Series 2018 A, RB",
        "value": "365360.94",
        "weight": "0.00496966",
        "shared": true
      },
      {
        "name": "N ORLEANS AVIAT 5% 1/1/2036@",
        "value": "360164.97",
        "weight": "0.00489899",
        "shared": false
      },
      {
        "name": "METROHEALTH SYSTEM 5.5% 02-15-52",
        "value": "346519.60",
        "weight": "0.00471338",
        "shared": true
      },
      {
        "name": "COOK CNTY IL CMNTY SCH DIST #152 1/2 HAZEL CREST",
        "value": "344323.26",
        "weight": "0.00468351",
        "shared": false
      },
      {
        "name": "Omaha Airport Authority",
        "value": "337127.43",
        "weight": "0.00458563",
        "shared": false
      },
      {
        "name": "PUBLIC FIN AUTH WI REVENUE",
        "value": "337075.52",
        "weight": "0.00458492",
        "shared": false
      },
      {
        "name": "STHRN ILLINOIS ST UNIV",
        "value": "333782.21",
        "weight": "0.00454013",
        "shared": false
      },
      {
        "name": "CENTRL TX REGL MOBILITY AUTH REVENUE",
        "value": "333300.19",
        "weight": "0.00453357",
        "shared": false
      },
      {
        "name": "PUERTO RICO ELEC PWR AUTH PWRREVENUE",
        "value": "332263.43",
        "weight": "0.00451947",
        "shared": false
      },
      {
        "name": "Miami County Unified School District No 367 Osawatomie     5.250%  09/01/2042",
        "value": "328437.87",
        "weight": "0.00446743",
        "shared": false
      },
      {
        "name": "CHESAPEAKE VA HOSP AUTH HOSP FAC REVENUE",
        "value": "325167.81",
        "weight": "0.00442295",
        "shared": false
      },
      {
        "name": "PK CREEK MET DIST-REF",
        "value": "321069.87",
        "weight": "0.00436721",
        "shared": false
      },
      {
        "name": "LAWTON OK INDL DEV AUTH SALES TAX REVENUE",
        "value": "320865.30",
        "weight": "0.00436443",
        "shared": false
      },
      {
        "name": "RAMPART RANGE CO MET DIST #1 LIMITED TAX SUPPORTED & SPL REV",
        "value": "317772.51",
        "weight": "0.00432236",
        "shared": false
      },
      {
        "name": "MASSACHUSETTS ST EDUCTNL FING AUTH",
        "value": "317098.02",
        "weight": "0.00431319",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING PASMED 03/60 ADJUSTABLE VAR",
        "value": "310811.90",
        "weight": "0.00422768",
        "shared": false
      },
      {
        "name": "GRAND PKWY TRANSPRTN",
        "value": "310065.69",
        "weight": "0.00421753",
        "shared": true
      },
      {
        "name": "RESTRUCTURED-SER A1",
        "value": "306984.12",
        "weight": "0.00417562",
        "shared": true
      },
      {
        "name": "MAINE HLTH & HGR EDUCTNL FACS AUTH REVENUE",
        "value": "302355.96",
        "weight": "0.00411266",
        "shared": false
      },
      {
        "name": "COMMERCE SCHOOL DISTRICT",
        "value": "300067.83",
        "weight": "0.00408154",
        "shared": false
      },
      {
        "name": "UT SALAPT 5 07/01/2042",
        "value": "299715.49",
        "weight": "0.00407675",
        "shared": true
      },
      {
        "name": "METROCARE SERVICES TX REVENUE",
        "value": "296998.54",
        "weight": "0.00403979",
        "shared": false
      },
      {
        "name": "GRAND RIVER CO HOSP DIST",
        "value": "294956.28",
        "weight": "0.00401201",
        "shared": false
      },
      {
        "name": "New York Transportation Development Corp., Series 2025",
        "value": "289840.85",
        "weight": "0.00394243",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST JOBS-ECON DEV AUTH HLTH FACS REVENUE",
        "value": "286176.85",
        "weight": "0.00389260",
        "shared": false
      },
      {
        "name": "WYOMING MI PUBLIC SCHS",
        "value": "283499.98",
        "weight": "0.00385618",
        "shared": false
      },
      {
        "name": "MASSACHUSET REV 5% 7/1/2041",
        "value": "282728.95",
        "weight": "0.00384570",
        "shared": false
      }
    ],
    "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",
        "weight": "0.04977583",
        "shared": false
      },
      {
        "name": "Franklin Federal Tax Free Income R6",
        "value": "656439810.79",
        "weight": "0.04704618",
        "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",
        "value": "322880269.60",
        "weight": "0.02314040",
        "shared": true
      },
      {
        "name": "VANGUARD TAX-EXM",
        "value": "310440040.35",
        "weight": "0.02224883",
        "shared": true
      },
      {
        "name": "DWS Managed Municipal Bond S",
        "value": "306113111.12",
        "weight": "0.02193872",
        "shared": false
      },
      {
        "name": "FIDELITY SAI ENHANCED MUNICIPAL INCOME FUND",
        "value": "259260993.15",
        "weight": "0.01858089",
        "shared": false
      },
      {
        "name": "BlackRock National Municipal Inv A",
        "value": "259004967.65",
        "weight": "0.01856254",
        "shared": false
      },
      {
        "name": "Eaton Vance National Municipal Income I",
        "value": "243829535.70",
        "weight": "0.01747494",
        "shared": false
      },
      {
        "name": "American High-Income Municipal Bond F-2",
        "value": "155640780.16",
        "weight": "0.01115457",
        "shared": false
      },
      {
        "name": "Fidelity Municipal Cash Central Fund",
        "value": "80023976.23",
        "weight": "0.00573521",
        "shared": false
      },
      {
        "name": "Invesco Government & Agency Portfolio, Institutional Class",
        "value": "40242334.91",
        "weight": "0.00288412",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 4% 07/01/2052 MT",
        "value": "37437239.06",
        "weight": "0.00268308",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 4.75000000",
        "value": "33883883.53",
        "weight": "0.00242841",
        "shared": false
      },
      {
        "name": "OH BUCGEN 5 06/01/2055",
        "value": "32929474.32",
        "weight": "0.00236001",
        "shared": false
      },
      {
        "name": "SOUTHEAST ENERGY-E",
        "value": "31490389.35",
        "weight": "0.00225687",
        "shared": false
      },
      {
        "name": "TN TNSUTL 5 12/01/2035",
        "value": "28499240.13",
        "weight": "0.00204250",
        "shared": false
      },
      {
        "name": "Public Energy Auth. of Kentucky Gas Supply Rev. Refg. C",
        "value": "20993906.34",
        "weight": "0.00150461",
        "shared": false
      },
      {
        "name": "California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB",
        "value": "20284645.40",
        "weight": "0.00145377",
        "shared": false
      },
      {
        "name": "Puerto Rico Commonwealth Aqueduct & Sewer Authority, Series A",
        "value": "20125969.14",
        "weight": "0.00144240",
        "shared": false
      },
      {
        "name": "CHICAGO ILLIN 6% 4/1/2046",
        "value": "18890444.64",
        "weight": "0.00135385",
        "shared": false
      },
      {
        "name": "MUNIBOND",
        "value": "18270368.41",
        "weight": "0.00130941",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "18207752.42",
        "weight": "0.00130493",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA(RCC) 5% 9/1/30MT 53",
        "value": "16523209.13",
        "weight": "0.00118420",
        "shared": false
      },
      {
        "name": "TX TTFTRN 5.5 10/01/2055",
        "value": "16370516.04",
        "weight": "0.00117325",
        "shared": false
      },
      {
        "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",
        "shared": false
      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds Cooperative District Energy Supply Series 2024C",
        "value": "15885729.16",
        "weight": "0.00113851",
        "shared": false
      },
      {
        "name": "NEW YORK ST URBAN DEV CORP SALES TAX REVENUE",
        "value": "15696810.00",
        "weight": "0.00112497",
        "shared": false
      },
      {
        "name": "NY NYEFAC 07/01/2056",
        "value": "15553968.75",
        "weight": "0.00111473",
        "shared": false
      },
      {
        "name": "San Francisco City & County Airport Comm-San Francisco International Airport",
        "value": "15330517.33",
        "weight": "0.00109872",
        "shared": false
      },
      {
        "name": "LOWER AL GAS DT-A-REF",
        "value": "15111818.57",
        "weight": "0.00108304",
        "shared": false
      },
      {
        "name": "State of Illinois, Series D",
        "value": "15006124.16",
        "weight": "0.00107547",
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      },
      {
        "name": "TOBACCO SETTLEMENT FING CORP N TOBGEN 06/46 FIXED 5",
        "value": "14988320.72",
        "weight": "0.00107419",
        "shared": false
      },
      {
        "name": "WI PUBTRN 5.75 12/31/2065",
        "value": "14578761.47",
        "weight": "0.00104484",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT 5.25000000",
        "value": "14489270.33",
        "weight": "0.00103843",
        "shared": false
      },
      {
        "name": "STATE OF ILLINOIS MCCORMICK PLACE EXPANSION PROJECT FUND 4.0% 06-15-52",
        "value": "14479978.80",
        "weight": "0.00103776",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.75000000",
        "value": "14373169.96",
        "weight": "0.00103011",
        "shared": false
      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022",
        "value": "14359374.05",
        "weight": "0.00102912",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 4% 9/1/2052",
        "value": "14357702.49",
        "weight": "0.00102900",
        "shared": false
      },
      {
        "name": "Southeast Energy Authority, Alabama, Revenue Bonds, Cooperative District Energy Supply Series 2025B",
        "value": "14355131.65",
        "weight": "0.00102881",
        "shared": false
      },
      {
        "name": "MAIN STR NAT GA 5% MT",
        "value": "14222939.55",
        "weight": "0.00101934",
        "shared": false
      },
      {
        "name": "Black Belt Energy Gas District, Series D-1",
        "value": "14178203.36",
        "weight": "0.00101613",
        "shared": false
      },
      {
        "name": "TX TXSUTL 01/01/2055",
        "value": "13568832.68",
        "weight": "0.00097246",
        "shared": true
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000",
        "value": "13388709.79",
        "weight": "0.00095955",
        "shared": false
      },
      {
        "name": "NEW YORK ST DO 5% 3/15/2041",
        "value": "13335564.04",
        "weight": "0.00095574",
        "shared": false
      },
      {
        "name": "California (State of) Community Choice Financing Authority (Clean Energy) (Green Bonds), Series 2024, RB",
        "value": "13108509.88",
        "weight": "0.00093947",
        "shared": false
      },
      {
        "name": "California Community Choice Financing Authority, Series 2025G",
        "value": "13063507.04",
        "weight": "0.00093624",
        "shared": false
      },
      {
        "name": "NY TRNSPRTN DEV CRP-A",
        "value": "13029440.89",
        "weight": "0.00093380",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-040051",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/2018846/000141036826040051/0001410368-26-040051-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"
    }
  ]
}