{
  "page": "compare",
  "query": {
    "a": "SWP1Z",
    "b": "SPYM"
  },
  "retrieved_at": "2026-07-07T09:29:47+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": "Schwab S&P 500 Index Portfolio",
    "ticker": "SWP1Z",
    "slug": "SWP1Z",
    "series_id": "S000006547",
    "html_url": "https://fundwatcher.app/funds/SWP1Z/"
  },
  "fund_b": {
    "name": "State Street(R) SPDR(R) Portfolio S&P 500(R) ETF",
    "ticker": "SPYM",
    "slug": "SPYM",
    "series_id": "S000006983",
    "html_url": "https://fundwatcher.app/funds/SPYM/"
  },
  "overlap": {
    "coverage_a_by_b": "0.9973102801019001729750008504",
    "coverage_b_by_a": "0.9973102801019001729750008505",
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    "as_of": {
      "a": "2026-03-31",
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      },
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      {
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      {
        "name": "MASTERCARD INC CL A",
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      {
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        "name": "LINDE PLC",
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      {
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-050043",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/918266/000141036826050043/0001410368-26-050043-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-055523",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1064642/000141036826055523/0001410368-26-055523-index.htm"
    }
  ]
}