{
  "page": "compare",
  "query": {
    "a": "SMXAX",
    "b": "DFAS"
  },
  "retrieved_at": "2026-07-07T18:14:46+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": "SIIT EXTENDED MARKET INDEX FUND",
    "ticker": "SMXAX",
    "slug": "SMXAX",
    "series_id": "S000035814",
    "html_url": "https://fundwatcher.app/funds/SMXAX/"
  },
  "fund_b": {
    "name": "Dimensional U.S. Small Cap ETF",
    "ticker": "DFAS",
    "slug": "DFAS",
    "series_id": "S000070906",
    "html_url": "https://fundwatcher.app/funds/DFAS/"
  },
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    "coverage_b_by_a": "0.4580765023460824381202028392",
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      "b": "2026-04-30"
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  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002048251-26-003453",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/939934/000204825126003453/0002048251-26-003453-index.htm"
    },
    {
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      "accession_no": "0001004726-26-005678",
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      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1816125/000100472626005678/0001004726-26-005678-index.htm"
    }
  ]
}