{
  "page": "compare",
  "query": {
    "a": "LMUB",
    "b": "MUB"
  },
  "retrieved_at": "2026-07-07T16:47:43+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": "iShares Long-Term National Muni Bond ETF",
    "ticker": "LMUB",
    "slug": "LMUB",
    "series_id": "S000091081",
    "html_url": "https://fundwatcher.app/funds/LMUB/"
  },
  "fund_b": {
    "name": "iShares National Muni Bond ETF",
    "ticker": "MUB",
    "slug": "MUB",
    "series_id": "S000018861",
    "html_url": "https://fundwatcher.app/funds/MUB/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.02536316000904538144007519038",
    "shared_count": 91,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-02-28"
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        "name": "NYC TRANS FIN AUTH",
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        "name": "Tarrant Regional Water District, Series 2025",
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        "name": "OMAHA PUB PWR DT-C",
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        "name": "BLKR-LI MUNI-INS",
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  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-008194",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000207169126008194/0002071691-26-008194-index.htm"
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}