{
  "page": "compare",
  "query": {
    "a": "MMIIX",
    "b": "PRFHX"
  },
  "retrieved_at": "2026-07-07T19:11:51+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 High Income Fund",
    "ticker": "MMIIX",
    "slug": "MMIIX",
    "series_id": "S000002429",
    "html_url": "https://fundwatcher.app/funds/MMIIX/"
  },
  "fund_b": {
    "name": "T. Rowe Price Tax-Free High Yield Fund",
    "ticker": "PRFHX",
    "slug": "PRFHX",
    "series_id": "S000002162",
    "html_url": "https://fundwatcher.app/funds/PRFHX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1182099217702169937009179244",
    "coverage_b_by_a": "0.1182099217702169937009179242",
    "shared_count": 219,
    "as_of": {
      "a": "2026-04-30",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
        "value": "128182109.40",
        "weight": "0.02402789",
        "shared": false
      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "99980308.87",
        "weight": "0.01874142",
        "shared": true
      },
      {
        "name": "TOWER HEALTH OBLIGATED GROUP 5.0% 06-30-39",
        "value": "31778309.80",
        "weight": "0.00595688",
        "shared": true
      },
      {
        "name": "OH BUCGEN 5 06/01/2055",
        "value": "31118098.51",
        "weight": "0.00583312",
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      },
      {
        "name": "California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB",
        "value": "26991046.83",
        "weight": "0.00505950",
        "shared": false
      },
      {
        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.13% 6/30/60@",
        "value": "24716563.99",
        "weight": "0.00463315",
        "shared": false
      },
      {
        "name": "New Hampshire Business Finance Authority, Series 2023A",
        "value": "24287021.38",
        "weight": "0.00455263",
        "shared": false
      },
      {
        "name": "City of Chicago, Series 2021A",
        "value": "24079941.62",
        "weight": "0.00451381",
        "shared": false
      },
      {
        "name": "NY TRANS CORP(JFK INT NEW ONE)/AGM 5.25% 6/30/60@",
        "value": "23614952.14",
        "weight": "0.00442665",
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      },
      {
        "name": "TOBACCO SETTLEMENT-B2",
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        "weight": "0.00427292",
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      },
      {
        "name": "NOVANT HEALTH OBLIGATED GROUP 5.5% 06-01-50",
        "value": "20399860.43",
        "weight": "0.00382398",
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      },
      {
        "name": "CHICAGO ILLIN 6% 4/1/2046",
        "value": "20086288.15",
        "weight": "0.00376520",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT AG 5.00000000",
        "value": "18789100.08",
        "weight": "0.00352204",
        "shared": false
      },
      {
        "name": "AL BBEUTL 5 06/01/2036",
        "value": "18702658.43",
        "weight": "0.00350584",
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      },
      {
        "name": "NY TRANSPRTN DEV CORP",
        "value": "18115723.44",
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      },
      {
        "name": "NY NYCDEV 5 11/15/2044",
        "value": "17974211.75",
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      },
      {
        "name": "Wisconsin (State of) Public Finance Authority, Series 2012 B, Ref. RB",
        "value": "17859485.18",
        "weight": "0.00334778",
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      },
      {
        "name": "MOHEG CT 608327 7.00% 2/1/2045",
        "value": "17850952.94",
        "weight": "0.00334618",
        "shared": false
      },
      {
        "name": "FL ST DFC 5% 7/1/2044 @",
        "value": "17651324.73",
        "weight": "0.00330876",
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      },
      {
        "name": "Palm Beach County, Florida, Revenue Bonds, Provident Group - LU Properties LLC Lynn University Housing Project, Series 2021A",
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        "weight": "0.00311269",
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      {
        "name": "Port of Beaumont Navigation District, Series 2024B",
        "value": "16221685.44",
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      },
      {
        "name": "JEA WTR & SWR REV-A",
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      },
      {
        "name": "Wisconsin (State of) Public Finance Authority (American Dream at Meadowlands), Series 2017, RB",
        "value": "16136650.00",
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      },
      {
        "name": "PROJECTNEW YORK TRANS",
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        "weight": "0.00301307",
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      },
      {
        "name": "Alachua County Health Facilities Authority, Series 2025 A",
        "value": "16043257.48",
        "weight": "0.00300733",
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      },
      {
        "name": "Michigan State Housing Development Authority, Series 2024A",
        "value": "15891403.87",
        "weight": "0.00297886",
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      },
      {
        "name": "New Hampshire Health and Education Facilities Authority Act, Series 2024",
        "value": "15349826.88",
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      {
        "name": "GOLDEN ST TOBACCO SEC",
        "value": "15147112.01",
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      },
      {
        "name": "Jefferson (County of), AL, Series 2024, Ref. Revenue Wts.",
        "value": "15042013.95",
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      {
        "name": "Energy Southeast A Cooperative District, Series B-1",
        "value": "14730178.05",
        "weight": "0.00276119",
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      {
        "name": "TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR",
        "value": "14595593.90",
        "weight": "0.00273596",
        "shared": false
      },
      {
        "name": "MONT PA IDA 5.375% 1/1/2050",
        "value": "14463406.15",
        "weight": "0.00271118",
        "shared": true
      },
      {
        "name": "TARRANT RETIRE 5.75% 12/1/2054",
        "value": "14317449.62",
        "weight": "0.00268382",
        "shared": true
      },
      {
        "name": "OU MEDICINE OBLIGATED GROUP 5.5% 08-15-57",
        "value": "14103918.40",
        "weight": "0.00264380",
        "shared": true
      },
      {
        "name": "New Hampshire Business Finance Authority, Series 2024A",
        "value": "13899326.60",
        "weight": "0.00260544",
        "shared": false
      },
      {
        "name": "Louisiana (State of) Public Facilities Authority (I-10 Calcasieu River Bridge), Series 2024, RB",
        "value": "13863625.37",
        "weight": "0.00259875",
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      },
      {
        "name": "IL CHIEDU 5 12/01/2042",
        "value": "13783991.12",
        "weight": "0.00258383",
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      {
        "name": "NH NFADEV 11/20/2039",
        "value": "13622288.42",
        "weight": "0.00255351",
        "shared": false
      },
      {
        "name": "SHELL POINT OBLIGATED GROUP 5.0% 11-15-54",
        "value": "13541452.71",
        "weight": "0.00253836",
        "shared": false
      },
      {
        "name": "METROHEALTH SYSTEM 5.5% 02-15-52",
        "value": "13525971.78",
        "weight": "0.00253546",
        "shared": true
      },
      {
        "name": "SYRACUSE PILOT 5% 1/1/2034 @",
        "value": "13493249.13",
        "weight": "0.00252933",
        "shared": false
      },
      {
        "name": "PUBLIC FIN AUTH WI REVENUE PUBGEN 06/56 FIXED 4.5",
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        "weight": "0.00249451",
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      },
      {
        "name": "MWAA DULLES TOL 4% 10/1/2049",
        "value": "12987102.05",
        "weight": "0.00243445",
        "shared": false
      },
      {
        "name": "FL ST DEV FIN CORP",
        "value": "12708332.83",
        "weight": "0.00238219",
        "shared": false
      },
      {
        "name": "BERKS PA MUN AU 3% 6/30/2044",
        "value": "12661578.55",
        "weight": "0.00237343",
        "shared": true
      },
      {
        "name": "OREGON ST FCS 4.90% 9/15/2035",
        "value": "12625405.76",
        "weight": "0.00236665",
        "shared": false
      },
      {
        "name": "PUBLIC FIN WIS 5.50% 6/1/2055",
        "value": "12623062.43",
        "weight": "0.00236621",
        "shared": false
      },
      {
        "name": "Black Belt Energy Gas District, Series 2025 A",
        "value": "12418023.88",
        "weight": "0.00232777",
        "shared": false
      },
      {
        "name": "SOUTH CAROLINA ST HSG FIN & DEV AUTH MTGE REVENUE",
        "value": "12324825.15",
        "weight": "0.00231030",
        "shared": false
      },
      {
        "name": "VIRGIN ISLANDS HOTEL DEV FING REGD OID B/E 6.00000000",
        "value": "12111560.59",
        "weight": "0.00227033",
        "shared": true
      }
    ],
    "b_top": [
      {
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        "weight": "0.01723211",
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      },
      {
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      },
      {
        "name": "PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000",
        "value": "36539893.47",
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      },
      {
        "name": "STATE OF ILLINOIS MCCORMICK PLACE EXPANSION PROJECT FUND NATL 0.0% 12-15-33",
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        "weight": "0.01048972",
        "shared": false
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      {
        "name": "GOLDEN ST TOBACCO SECURITIZATI REGD ZCP OID B/E 0.00000000",
        "value": "28650250.24",
        "weight": "0.00829688",
        "shared": false
      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022",
        "value": "20006067.93",
        "weight": "0.00579360",
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      },
      {
        "name": "California (State of) Community Housing Agency (Stonridge Apartments), Series 2021 A, RB",
        "value": "18409300.71",
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      {
        "name": "WI PUBTRN 5.75 06/30/2060",
        "value": "18134569.16",
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      },
      {
        "name": "TUSCLSA AL GOZ 5.25% 5/1/2044",
        "value": "17677363.03",
        "weight": "0.00511922",
        "shared": false
      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Clawback Highway Transportation Authority Claims Taxable Series 2022",
        "value": "17272818.05",
        "weight": "0.00500207",
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      },
      {
        "name": "CITY OF BALTIMORE MD",
        "value": "16951312.16",
        "weight": "0.00490896",
        "shared": true
      },
      {
        "name": "Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022",
        "value": "16834842.81",
        "weight": "0.00487524",
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      },
      {
        "name": "MD HEFA 5.50% 1/1/2046",
        "value": "16509725.51",
        "weight": "0.00478108",
        "shared": false
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      {
        "name": "WI PUBFIN 4 08/01/2035",
        "value": "16173052.90",
        "weight": "0.00468359",
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      },
      {
        "name": "SIGNIA HOTEL MANAGEMENT LLC 5.0% 01-01-54",
        "value": "15609784.85",
        "weight": "0.00452047",
        "shared": true
      },
      {
        "name": "RESTRUCTURED-SER A1",
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      },
      {
        "name": "OH ST AIR QUALI 5% 7/1/2049",
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        "weight": "0.00431551",
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      },
      {
        "name": "California Community Housing Agency, Series 2021 A",
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      {
        "name": "SALT VERDE FINL. CO 5.00%",
        "value": "14445569.66",
        "weight": "0.00418332",
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      },
      {
        "name": "District of Columbia Tobacco Settlement Financing Corp., Series 2006 A, RB",
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      {
        "name": "MD MDSDEV 5.25 06/30/2055",
        "value": "13785551.15",
        "weight": "0.00399218",
        "shared": false
      },
      {
        "name": "TX PRIVATE ACTIVITY",
        "value": "13645762.89",
        "weight": "0.00395170",
        "shared": false
      },
      {
        "name": "BERKS PA MUN AU 3% 6/30/2044",
        "value": "13557067.85",
        "weight": "0.00392602",
        "shared": true
      },
      {
        "name": "San Francisco (City & County of), CA Airport Commission (San Francisco International Airport), Series 2025 A, RB",
        "value": "12910380.00",
        "weight": "0.00373874",
        "shared": false
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      {
        "name": "WI PUBTRN 6.5 12/31/2065",
        "value": "12814070.10",
        "weight": "0.00371085",
        "shared": false
      },
      {
        "name": "CUYAHOGA HOSP 5.5% 2/15/2057",
        "value": "12703812.93",
        "weight": "0.00367892",
        "shared": true
      },
      {
        "name": "CALIFORNIA COMMUNITY HOUSING AGENCY VERDANT AT GREEN VALLEY APARTMENTS 5.0% 08-01-49",
        "value": "12694158.12",
        "weight": "0.00367613",
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      },
      {
        "name": "Massachusetts Development Finance Agency",
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        "weight": "0.00361990",
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      {
        "name": "NY TRANS CORP 5% 8/1/2031 AMT",
        "value": "12464324.60",
        "weight": "0.00360957",
        "shared": false
      },
      {
        "name": "SHEFA SCHOOL 5.0% 06-15-51",
        "value": "12368969.05",
        "weight": "0.00358195",
        "shared": false
      },
      {
        "name": "CITY OF ATLANTA GA WESTSIDE TAX ALLOCATION DISTRICT GULCH AREA 0.0% 12-15-48",
        "value": "12333067.74",
        "weight": "0.00357156",
        "shared": true
      },
      {
        "name": "ST LOUIS MO SP 5.125% 9/1/2048",
        "value": "12305137.60",
        "weight": "0.00356347",
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      {
        "name": "New Hampshire (State of) Business Finance Authority (Thomas Ranch), Series 2024, RB",
        "value": "12146520.31",
        "weight": "0.00351753",
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      },
      {
        "name": "Aurora Crossroads Metropolitan District 2, Colorado, Limited Tax General Obligation Bonds, Series 2025A-3",
        "value": "12014822.40",
        "weight": "0.00347940",
        "shared": false
      },
      {
        "name": "County of Calhoun Hospital Finance Authority, Michigan, Hospital Revenue Bonds, Oaklawn Hospital, Refunding Series 2016",
        "value": "11939113.16",
        "weight": "0.00345747",
        "shared": false
      },
      {
        "name": "MET WASHINGTON DC ARPTS AUTH DULLES TOLL ROAD REVENUE",
        "value": "11827508.88",
        "weight": "0.00342515",
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      },
      {
        "name": "RESTRUCTURED-SER A1",
        "value": "11806475.84",
        "weight": "0.00341906",
        "shared": true
      },
      {
        "name": "COLORADO EDUCTNL & CULTURAL AUTH REVENUE",
        "value": "11796182.94",
        "weight": "0.00341608",
        "shared": false
      },
      {
        "name": "ST LOUIS MO LD 5.375% 6/1/2043",
        "value": "11644647.47",
        "weight": "0.00337220",
        "shared": false
      },
      {
        "name": "CHICAGO ILL BRD ED CAP APPREC-SCH REFORM-B-1 FGIC",
        "value": "11613209.36",
        "weight": "0.00336309",
        "shared": false
      },
      {
        "name": "PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.75000000",
        "value": "11491132.57",
        "weight": "0.00332774",
        "shared": true
      },
      {
        "name": "California (State of) Community Choice Financing Authority (Green Bonds), Series 2023, RB",
        "value": "11400527.48",
        "weight": "0.00330150",
        "shared": false
      },
      {
        "name": "Public Authority for Colorado Energy, Series 2008, RB",
        "value": "11397303.16",
        "weight": "0.00330057",
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      },
      {
        "name": "BLACK BELT ENERGY GAS VAR",
        "value": "11353496.81",
        "weight": "0.00328788",
        "shared": true
      },
      {
        "name": "Cleveland-Cuyahoga County Port Authority, Series 2018",
        "value": "11244931.26",
        "weight": "0.00325644",
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      },
      {
        "name": "RESTRUCTURED-SER A1",
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        "shared": false
      },
      {
        "name": "KY KYSDEV 5.25 06/01/2050",
        "value": "11164704.13",
        "weight": "0.00323321",
        "shared": false
      },
      {
        "name": "SKY HARBOUR CAPITAL LLC OBLIGATED GROUP 4.25% 07-01-54",
        "value": "11053731.58",
        "weight": "0.00320107",
        "shared": false
      },
      {
        "name": "UNITED STATES STEEL CORP 4.125% 12-01-26",
        "value": "10978510.37",
        "weight": "0.00317929",
        "shared": false
      },
      {
        "name": "VIRGIN ISLANDS HOTEL DEV FING REGD OID B/E 6.00000000",
        "value": "10786386.60",
        "weight": "0.00312365",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-015576",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/225604/000207169126015576/0002071691-26-015576-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001099263-26-004388",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/758003/000109926326004388/0001099263-26-004388-index.htm"
    }
  ]
}