{
  "page": "compare",
  "query": {
    "a": "VB",
    "b": "FSMAX"
  },
  "retrieved_at": "2026-07-07T16:32:30+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": "VANGUARD SMALL-CAP INDEX FUND",
    "ticker": "VB",
    "slug": "VB",
    "series_id": "S000002845",
    "html_url": "https://fundwatcher.app/funds/VB/"
  },
  "fund_b": {
    "name": "Fidelity Extended Market Index Fund",
    "ticker": "FSMAX",
    "slug": "FSMAX",
    "series_id": "S000006021",
    "html_url": "https://fundwatcher.app/funds/FSMAX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.6661686520804521168927206544",
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      },
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        "name": "JABIL INC",
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        "name": "NATERA INC",
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        "name": "EXPAND ENERGY CORP",
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        "name": "TWILIO INC CLASS A",
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        "name": "LIBERTY MEDIA CORP LIBERTY FORMULA ONE CL C",
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        "name": "ROCKET LAB CORP",
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        "name": "BLOOM ENERGY CORP CL A",
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        "name": "ILLUMINA INC",
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      {
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        "name": "LIBERTY MEDIA CORP LIBERTY FORMULA ONE CL C",
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        "name": "HEICO CORP CL A",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000036405-26-000319",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/36405/000003640526000319/0000036405-26-000319-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002587",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/819118/000003540226002587/0000035402-26-002587-index.htm"
    }
  ]
}