{
  "page": "compare",
  "query": {
    "a": "FDFIX",
    "b": "MIEAX"
  },
  "retrieved_at": "2026-07-07T11:08:18+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 500 Index Fund",
    "ticker": "FDFIX",
    "slug": "FDFIX",
    "series_id": "S000056363",
    "html_url": "https://fundwatcher.app/funds/FDFIX/"
  },
  "fund_b": {
    "name": "MM S&P 500 Index Fund",
    "ticker": "MIEAX",
    "slug": "MIEAX",
    "series_id": "S000003661",
    "html_url": "https://fundwatcher.app/funds/MIEAX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.9564686057367806351788209757",
    "coverage_b_by_a": "0.9564686057367806351788209757",
    "shared_count": 448,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-03-31"
    },
    "a_top": [
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      },
      {
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      },
      {
        "name": "MICROSOFT CORP",
        "value": "399506517.46",
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      },
      {
        "name": "AMAZON.COM INC",
        "value": "279607440.00",
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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",
        "value": "198970758.42",
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      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "193218568.92",
        "weight": "0.02373653",
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      },
      {
        "name": "TESLA INC",
        "value": "154792465.68",
        "weight": "0.01901595",
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      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "126715182.70",
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      },
      {
        "name": "LILLY ELI and CO",
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      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "111868356.60",
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      },
      {
        "name": "EXXON MOBIL CORP",
        "value": "88043130.00",
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      },
      {
        "name": "JOHNSON&JOHNSON",
        "value": "81909855.30",
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      },
      {
        "name": "WALMART INC",
        "value": "76807233.45",
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      },
      {
        "name": "VISA INC-CLASS A",
        "value": "73930570.48",
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      },
      {
        "name": "MICRON TECHNOLOGY INC",
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      },
      {
        "name": "COSTCO WHOLESALE CORP",
        "value": "61329683.25",
        "weight": "0.00753423",
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      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "58030962.00",
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      },
      {
        "name": "ABBVIE INC",
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      {
        "name": "NETFLIX INC",
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      },
      {
        "name": "PROCTER & GAMBLE",
        "value": "53469891.20",
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      },
      {
        "name": "HOME DEPOT INC",
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      },
      {
        "name": "GENERAL ELECTRIC CO",
        "value": "49410022.64",
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      },
      {
        "name": "CHEVRON CORP",
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      },
      {
        "name": "CATERPILLAR INC",
        "value": "47570090.37",
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      },
      {
        "name": "BANK OF AMERICA CORPORATION",
        "value": "45797407.59",
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      },
      {
        "name": "ADV MICRO DEVICE",
        "value": "44612393.88",
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      },
      {
        "name": "COCA-COLA CO/THE",
        "value": "43225168.80",
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      },
      {
        "name": "PALANTIR TECHNOLOGIES INC",
        "value": "42892041.93",
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      },
      {
        "name": "CISCO SYSTEMS INC",
        "value": "42849996.90",
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      },
      {
        "name": "MERCK & CO",
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      },
      {
        "name": "APPLIED MATERIALS INC",
        "value": "40595592.00",
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      },
      {
        "name": "LAM RESEARCH CORP",
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      {
        "name": "PHILIP MORRIS INTL INC",
        "value": "39815154.47",
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      },
      {
        "name": "RTX CORP",
        "value": "37180972.62",
        "weight": "0.00456761",
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      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "36363427.11",
        "weight": "0.00446718",
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      },
      {
        "name": "GOLDMAN SACHS GROUP INC",
        "value": "35284488.93",
        "weight": "0.00433463",
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      },
      {
        "name": "WELLS FARGO & CO",
        "value": "34978783.95",
        "weight": "0.00429708",
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      },
      {
        "name": "ORACLE CORP",
        "value": "33472824.80",
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      },
      {
        "name": "MCDONALDS CORP",
        "value": "33257442.72",
        "weight": "0.00408561",
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      },
      {
        "name": "LINDE PLC",
        "value": "32466312.00",
        "weight": "0.00398842",
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      },
      {
        "name": "GE VERNOVA LLC",
        "value": "32435894.40",
        "weight": "0.00398469",
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      },
      {
        "name": "PEPSICO INC",
        "value": "31774988.52",
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      },
      {
        "name": "INTL BUS MACH CORP",
        "value": "30719015.64",
        "weight": "0.00377377",
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      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "28931732.66",
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      {
        "name": "AMGEN INC",
        "value": "28601181.44",
        "weight": "0.00351360",
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      },
      {
        "name": "INTEL CORP",
        "value": "27991039.44",
        "weight": "0.00343864",
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      },
      {
        "name": "ABBOTT LABS",
        "value": "27695954.00",
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      },
      {
        "name": "MORGAN STANLEY",
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    ],
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      {
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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",
        "value": "48634244.40",
        "weight": "0.02396901",
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      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "45364187.70",
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      },
      {
        "name": "TESLA INC",
        "value": "37934113.50",
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      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "31850028.00",
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      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "28752080.88",
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      },
      {
        "name": "LILLY ELI and CO",
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      },
      {
        "name": "EXXON MOBIL CORP",
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      {
        "name": "JOHNSON&JOHNSON",
        "value": "21386788.92",
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      },
      {
        "name": "WALMART INC",
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      },
      {
        "name": "VISA INC-CLASS A",
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      },
      {
        "name": "COSTCO WHOLESALE CORP",
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      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "14751961.84",
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      },
      {
        "name": "NETFLIX INC",
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      },
      {
        "name": "CHEVRON CORP",
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      },
      {
        "name": "ABBVIE INC",
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      {
        "name": "MICRON TECHNOLOGY INC",
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      {
        "name": "PROCTER & GAMBLE",
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      },
      {
        "name": "PALANTIR TECHNOLOGIES INC",
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      },
      {
        "name": "ADV MICRO DEVICE",
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      },
      {
        "name": "CATERPILLAR INC",
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      },
      {
        "name": "HOME DEPOT INC",
        "value": "11888386.83",
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      },
      {
        "name": "BANK OF AMERICA CORPORATION",
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      },
      {
        "name": "CISCO SYSTEMS INC",
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      },
      {
        "name": "MERCK & CO",
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      },
      {
        "name": "GENERAL ELECTRIC CO",
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      },
      {
        "name": "COCA-COLA CO/THE",
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      },
      {
        "name": "APPLIED MATERIALS INC",
        "value": "9826120.71",
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      },
      {
        "name": "LAM RESEARCH CORP",
        "value": "9672601.86",
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      },
      {
        "name": "RTX CORP",
        "value": "9392301.00",
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      },
      {
        "name": "PHILIP MORRIS INTL INC",
        "value": "9346504.86",
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      {
        "name": "GOLDMAN SACHS GROUP INC",
        "value": "9214523.08",
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      },
      {
        "name": "ORACLE CORP",
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      },
      {
        "name": "WELLS FARGO & CO",
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      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "8901058.05",
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      },
      {
        "name": "GE VERNOVA LLC",
        "value": "8529105.90",
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      },
      {
        "name": "LINDE PLC",
        "value": "8406602.32",
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      },
      {
        "name": "INTL BUS MACH CORP",
        "value": "8227928.55",
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      },
      {
        "name": "MCDONALDS CORP",
        "value": "8037650.98",
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      },
      {
        "name": "PEPSICO INC",
        "value": "7707974.44",
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      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "7675329.00",
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      },
      {
        "name": "INTEL CORP",
        "value": "7511587.95",
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      },
      {
        "name": "AT&T INC",
        "value": "7357256.14",
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        "shared": true
      },
      {
        "name": "MORGAN STANLEY",
        "value": "7196152.39",
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      },
      {
        "name": "CITIGROUP INC",
        "value": "7184636.91",
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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": "0001410368-26-053571",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/916053/000141036826053571/0001410368-26-053571-index.htm"
    }
  ]
}