{
  "page": "compare",
  "query": {
    "a": "MIMIX",
    "b": "RTHAX"
  },
  "retrieved_at": "2026-07-07T16:23:02+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": "MFS Municipal Income Fund",
    "ticker": "MIMIX",
    "slug": "MIMIX",
    "series_id": "S000002536",
    "html_url": "https://fundwatcher.app/funds/MIMIX/"
  },
  "fund_b": {
    "name": "Tax-Exempt High Yield Bond Fund",
    "ticker": "RTHAX",
    "slug": "RTHAX",
    "series_id": "S000049244",
    "html_url": "https://fundwatcher.app/funds/RTHAX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.09093761925274742092916933053",
    "shared_count": 311,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-04-30"
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        "name": "TEXAS ST MUNI GAS ACQUISITION& TEXAS MUNICIPAL GAS ACQUISITION & SUPPLY CORP IV",
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      },
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      {
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      {
        "name": "FRETE ML-15 TRUST",
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      {
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      {
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      {
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      {
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      {
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      {
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      {
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      {
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      {
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        "name": "LONGWOOD HOUSING FOUNDATION LLC 5.0% 01-01-40",
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      {
        "name": "Black Belt Energy Gas District",
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  "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"
    },
    {
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      "accession_no": "0001410368-26-063588",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/351601/000141036826063588/0001410368-26-063588-index.htm"
    }
  ]
}