{
  "page": "compare",
  "query": {
    "a": "FDFIX",
    "b": "SPYM"
  },
  "retrieved_at": "2026-07-07T10:59:27+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 500 Index Fund",
    "ticker": "FDFIX",
    "slug": "FDFIX",
    "series_id": "S000056363",
    "html_url": "https://fundwatcher.app/funds/FDFIX/"
  },
  "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": "0.9563672942824700405308419828",
    "coverage_b_by_a": "0.9563672942824700405308419828",
    "shared_count": 448,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-03-31"
    },
    "a_top": [
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      },
      {
        "name": "MICROSOFT CORP",
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      },
      {
        "name": "AMAZON.COM INC",
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      },
      {
        "name": "ALPHABET INC CL A",
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      {
        "name": "BROADCOM INC",
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      },
      {
        "name": "ALPHABET INC CL C",
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      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "193218568.92",
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      },
      {
        "name": "TESLA INC",
        "value": "154792465.68",
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      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "126715182.70",
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      },
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        "name": "LILLY ELI and CO",
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      },
      {
        "name": "JPMORGAN CHASE and CO",
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      },
      {
        "name": "EXXON MOBIL CORP",
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      },
      {
        "name": "JOHNSON&JOHNSON",
        "value": "81909855.30",
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      {
        "name": "WALMART INC",
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      {
        "name": "VISA INC-CLASS A",
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      },
      {
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      },
      {
        "name": "COSTCO WHOLESALE CORP",
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      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "58030962.00",
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      {
        "name": "ABBVIE INC",
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      {
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      },
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        "value": "53469891.20",
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      },
      {
        "name": "HOME DEPOT INC",
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      },
      {
        "name": "GENERAL ELECTRIC CO",
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      {
        "name": "CHEVRON CORP",
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      {
        "name": "CATERPILLAR INC",
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      },
      {
        "name": "BANK OF AMERICA CORPORATION",
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      },
      {
        "name": "ADV MICRO DEVICE",
        "value": "44612393.88",
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      },
      {
        "name": "COCA-COLA CO/THE",
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      {
        "name": "PALANTIR TECHNOLOGIES INC",
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      {
        "name": "CISCO SYSTEMS INC",
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      {
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      {
        "name": "APPLIED MATERIALS INC",
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      {
        "name": "LAM RESEARCH CORP",
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      {
        "name": "PHILIP MORRIS INTL INC",
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      {
        "name": "RTX CORP",
        "value": "37180972.62",
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      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "36363427.11",
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      {
        "name": "GOLDMAN SACHS GROUP INC",
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        "name": "WELLS FARGO & CO",
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      {
        "name": "ORACLE CORP",
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      {
        "name": "MCDONALDS CORP",
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      },
      {
        "name": "LINDE PLC",
        "value": "32466312.00",
        "weight": "0.00398842",
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      },
      {
        "name": "GE VERNOVA LLC",
        "value": "32435894.40",
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      {
        "name": "PEPSICO INC",
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      {
        "name": "INTL BUS MACH CORP",
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      {
        "name": "VERIZON COMMUNICATIONS INC",
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      {
        "name": "AMGEN INC",
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      {
        "name": "INTEL CORP",
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      {
        "name": "ABBOTT LABS",
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      {
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        "name": "ALPHABET INC CL C",
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      {
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      {
        "name": "BERKSHIRE HATH-B",
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        "name": "EXXON MOBIL CORP",
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        "name": "WALMART INC",
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      {
        "name": "VISA INC-CLASS A",
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      {
        "name": "MASTERCARD INC CL A",
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      {
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      {
        "name": "CISCO SYSTEMS INC",
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      {
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      {
        "name": "COCA-COLA CO/THE",
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      {
        "name": "APPLIED MATERIALS INC",
        "value": "570158697.45",
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      },
      {
        "name": "LAM RESEARCH CORP",
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      {
        "name": "RTX CORP",
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      {
        "name": "PHILIP MORRIS INTL INC",
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        "name": "GOLDMAN SACHS GROUP INC",
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      {
        "name": "ORACLE CORP",
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      {
        "name": "GE VERNOVA LLC",
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      {
        "name": "INTL BUS MACH CORP",
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      {
        "name": "MCDONALDS CORP",
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        "name": "PEPSICO INC",
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      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
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      },
      {
        "name": "INTEL CORP",
        "value": "435558642.87",
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      },
      {
        "name": "AT&T INC",
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      },
      {
        "name": "CITIGROUP INC",
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      },
      {
        "name": "MORGAN STANLEY",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-002571",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/819118/000003540226002571/0000035402-26-002571-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"
    }
  ]
}