{
  "page": "compare",
  "query": {
    "a": "FXMCX",
    "b": "MPSIX"
  },
  "retrieved_at": "2026-07-07T18:51:18+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": "Fidelity Flex Mid Cap Focused Index Fund",
    "ticker": "FXMCX",
    "slug": "FXMCX",
    "series_id": "S000093537",
    "html_url": "https://fundwatcher.app/funds/FXMCX/"
  },
  "fund_b": {
    "name": "MidCap S&P 400 Index Fund",
    "ticker": "MPSIX",
    "slug": "MPSIX",
    "series_id": "S000007079",
    "html_url": "https://fundwatcher.app/funds/MPSIX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.4712844421060338605273933599",
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    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
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      },
      {
        "name": "FLEX LTD",
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        "name": "FIVE BELOW INC",
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        "name": "PURE STORAGE INC CL A",
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        "name": "NEXTRACKER INC CL A",
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      {
        "name": "EXACT SCIENCES CORP",
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      {
        "name": "ANGLOGOLD ASHANTI PLC",
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      },
      {
        "name": "BWX TECHNOLOGIES INC",
        "value": "65532.17",
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      },
      {
        "name": "ATI INC",
        "value": "62796.60",
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        "name": "IONIS PHARMACEUTICALS INC",
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      {
        "name": "HUNTINGTON INGALLS INDUSTRIES INC",
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      },
      {
        "name": "TALEN ENERGY CORP",
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      {
        "name": "AFFIRM HOLDINGS INC",
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        "name": "MASTEC INC",
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      {
        "name": "JONES LANG LASALLE INC",
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      {
        "name": "INCYTE CORP",
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      {
        "name": "ROLLINS INC",
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        "name": "COMFORT SYSTEMS USA INC",
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        "name": "PENTAIR PLC",
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        "name": "EMCOR GROUP INC",
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      {
        "name": "RBC BEARINGS INC",
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      },
      {
        "name": "EAST WEST BNCRP",
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      {
        "name": "ITT INC",
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      {
        "name": "CARLYLE GROUP INC (THE)",
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      {
        "name": "PERFORMANCE FOOD GROUP CO",
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      {
        "name": "MEDPACE HOLDINGS INC",
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      {
        "name": "LINCOLN ELECTRIC HLDGS INC",
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      {
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        "name": "ONTO INNOVATION INC",
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        "name": "TOPBUILD CORP",
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        "name": "TKO GROUP HOLDINGS INC",
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        "name": "ALLEGION PLC",
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        "name": "SOFI TECHNOLOGIES INC A",
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        "name": "EPAM SYSTEMS INC",
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        "name": "LYFT INC-A",
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        "name": "RPM INTL INC",
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        "name": "NEW YORK TIMES CO CL A",
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        "name": "HASBRO INC",
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        "name": "CLEAN HARBORS INC",
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        "name": "CROWN HOLDINGS INC",
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        "name": "JANUS HENDERSON GROUP PLC",
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        "name": "OKTA INC CL A",
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  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-001947",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/35315/000003540226001947/0000035402-26-001947-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000898745-26-000440",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/898745/000089874526000440/0000898745-26-000440-index.htm"
    }
  ]
}