{
  "page": "compare",
  "query": {
    "a": "IBRN",
    "b": "FBT"
  },
  "retrieved_at": "2026-07-07T17:30:17+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 Neuroscience and Healthcare ETF",
    "ticker": "IBRN",
    "slug": "IBRN",
    "series_id": "S000076483",
    "html_url": "https://fundwatcher.app/funds/IBRN/"
  },
  "fund_b": {
    "name": "First Trust NYSE Arca Biotechnology Index Fund",
    "ticker": "FBT",
    "slug": "FBT",
    "series_id": "S000012478",
    "html_url": "https://fundwatcher.app/funds/FBT/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1895175708325957751778377122",
    "coverage_b_by_a": "0.1895175708325957751778377122",
    "shared_count": 6,
    "as_of": {
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      "b": "2026-03-31"
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    "a_top": [
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      {
        "name": "BIOGEN INC",
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      {
        "name": "PTC THERAPEUTICS INC",
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      {
        "name": "DENALI THERAPEUTICS INC",
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      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "180707.50",
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        "name": "SUPERNUS PHARMACEUTICALS INC",
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        "name": "CENTESSA PHARMACEUTICALS LTD ADR",
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      {
        "name": "SK BIOPHARMS. CO LTD",
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      {
        "name": "EDGEWISE THERAPEUTICS INC",
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      {
        "name": "AVADEL PHARMACEU",
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      {
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        "name": "DYNE THERAPEUTICS INC",
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      },
      {
        "name": "H LUNDBECK A/S",
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      {
        "name": "AXOGEN INC",
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      {
        "name": "BIOARCTIC AB",
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      {
        "name": "BIOHAVEN LTD",
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      {
        "name": "NEUREN PHARMACEU",
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      {
        "name": "TAYSHA GENE THERAPIES INC",
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      {
        "name": "TOBII DYNAVOX AB",
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        "name": "IDORSIA LTD",
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      {
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        "name": "Bright Minds Biosciences Inc COM NEW",
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        "name": "MEDINCELL SA",
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        "name": "FULCRUM THERAPEUTICS INC",
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        "name": "REGENXBIO INC",
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      {
        "name": "MICROPORT NEUROTECH LTD",
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        "name": "CERIBELL INC",
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        "name": "ANAVEX LIFE SCIENCES CORP",
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      {
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        "name": "BENITEC BIOPHARMA INC",
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        "name": "NEUROPACE INC",
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        "name": "PEIJIA MEDICAL LTD",
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      {
        "name": "PROTHENA CORP PLC COMMON STOCK USD.01",
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        "name": "SOLID BIOSCIENCES INC",
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        "name": "CORCEPT THERAPEUTICS INC",
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        "name": "VERTEX PHARMACEUTICALS INC",
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        "name": "BIOMARIN PHARMACEUTICAL INC",
        "value": "77280579.60",
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      {
        "name": "ARGENX SE SPONSORED ADR",
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      {
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        "name": "DAIWA CAPITAL MARKETS AMERICA INC",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001004726-26-001911",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000100472626001911/0001004726-26-001911-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000940400-26-021488",
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      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1329377/000094040026021488/0000940400-26-021488-index.htm"
    }
  ]
}