{
  "page": "compare",
  "query": {
    "a": "IYY",
    "b": "FZROX"
  },
  "retrieved_at": "2026-07-07T11:14:27+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": "iShares Dow Jones U.S. ETF",
    "ticker": "IYY",
    "slug": "IYY",
    "series_id": "S000004330",
    "html_url": "https://fundwatcher.app/funds/IYY/"
  },
  "fund_b": {
    "name": "Fidelity ZERO Total Market Index Fund",
    "ticker": "FZROX",
    "slug": "FZROX",
    "series_id": "S000063106",
    "html_url": "https://fundwatcher.app/funds/FZROX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.9183341897468553504033537511",
    "coverage_b_by_a": "0.9183341897468553504033537512",
    "shared_count": 896,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "NVIDIA CORP",
        "value": "201178850.88",
        "weight": "0.07212106",
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      },
      {
        "name": "APPLE INC",
        "value": "166080433.48",
        "weight": "0.05953855",
        "shared": true
      },
      {
        "name": "MICROSOFT CORP",
        "value": "138527562.60",
        "weight": "0.04966106",
        "shared": true
      },
      {
        "name": "AMAZON.COM INC",
        "value": "100836473.30",
        "weight": "0.03614910",
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      },
      {
        "name": "ALPHABET INC CL A",
        "value": "85180056.00",
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      },
      {
        "name": "ALPHABET INC CL C",
        "value": "68186712.60",
        "weight": "0.02444441",
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      },
      {
        "name": "BROADCOM INC",
        "value": "67768408.90",
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      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "67592460.50",
        "weight": "0.02423138",
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      },
      {
        "name": "TESLA INC",
        "value": "52387353.15",
        "weight": "0.01878046",
        "shared": true
      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "38168497.90",
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      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "36069631.13",
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      },
      {
        "name": "LILLY ELI and CO",
        "value": "35675885.70",
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      },
      {
        "name": "EXXON MOBIL CORP",
        "value": "25838163.40",
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      },
      {
        "name": "JOHNSON&JOHNSON",
        "value": "23696948.25",
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      },
      {
        "name": "VISA INC-CLASS A",
        "value": "23534462.41",
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      },
      {
        "name": "WALMART INC",
        "value": "22639221.08",
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      },
      {
        "name": "MICRON TECHNOLOGY INC",
        "value": "20184741.76",
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      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "19149674.18",
        "weight": "0.00686501",
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      },
      {
        "name": "COSTCO WHOLESALE CORP",
        "value": "18034935.25",
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      },
      {
        "name": "BlackRock Cash Funds: Institutional, SL Agency Shares",
        "value": "17249902.36",
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      },
      {
        "name": "ABBVIE INC",
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      },
      {
        "name": "ADV MICRO DEVICE",
        "value": "16707219.75",
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      },
      {
        "name": "HOME DEPOT INC",
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      },
      {
        "name": "BANK OF AMERICA CORPORATION",
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      },
      {
        "name": "PROCTER & GAMBLE",
        "value": "15350017.80",
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      },
      {
        "name": "NETFLIX INC",
        "value": "15318494.73",
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      },
      {
        "name": "PALANTIR TECHNOLOGIES INC",
        "value": "14517687.24",
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      },
      {
        "name": "CHEVRON CORP",
        "value": "14491294.20",
        "weight": "0.00519502",
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      },
      {
        "name": "GENERAL ELECTRIC CO",
        "value": "14005883.87",
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      },
      {
        "name": "CISCO SYSTEMS INC",
        "value": "13358180.88",
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      },
      {
        "name": "CATERPILLAR INC",
        "value": "13325344.56",
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      },
      {
        "name": "LAM RESEARCH CORP",
        "value": "12691585.98",
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      },
      {
        "name": "COCA-COLA CO/THE",
        "value": "12545262.95",
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      },
      {
        "name": "INTL BUS MACH CORP",
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      },
      {
        "name": "WELLS FARGO & CO",
        "value": "12294333.36",
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      },
      {
        "name": "GOLDMAN SACHS GROUP INC",
        "value": "12142557.21",
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      },
      {
        "name": "PHILIP MORRIS INTL INC",
        "value": "12090846.64",
        "weight": "0.00433448",
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      },
      {
        "name": "ORACLE CORP",
        "value": "11981094.84",
        "weight": "0.00429513",
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      },
      {
        "name": "MERCK & CO",
        "value": "11845754.75",
        "weight": "0.00424661",
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      },
      {
        "name": "RTX CORP",
        "value": "11659967.90",
        "weight": "0.00418001",
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      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "11258272.41",
        "weight": "0.00403600",
        "shared": true
      },
      {
        "name": "APPLIED MATERIALS INC",
        "value": "11113271.28",
        "weight": "0.00398402",
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      },
      {
        "name": "MCDONALDS CORP",
        "value": "9705780.00",
        "weight": "0.00347945",
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      },
      {
        "name": "MORGAN STANLEY",
        "value": "9582010.40",
        "weight": "0.00343508",
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      },
      {
        "name": "THERMO FISHER SCIENTIFIC INC",
        "value": "9426135.51",
        "weight": "0.00337920",
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      },
      {
        "name": "LINDE PLC",
        "value": "9257755.23",
        "weight": "0.00331883",
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      },
      {
        "name": "PEPSICO INC",
        "value": "9087521.76",
        "weight": "0.00325781",
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      },
      {
        "name": "INTEL CORP",
        "value": "9018154.08",
        "weight": "0.00323294",
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      },
      {
        "name": "CITIGROUP INC",
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      },
      {
        "name": "SALESFORCE INC",
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    ],
    "b_top": [
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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",
        "value": "983382608.00",
        "weight": "0.02924428",
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      },
      {
        "name": "ALPHABET INC CL C",
        "value": "786103221.24",
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        "shared": true
      },
      {
        "name": "BROADCOM INC",
        "value": "781890859.70",
        "weight": "0.02325223",
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      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "779855079.50",
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      },
      {
        "name": "TESLA INC",
        "value": "604422180.54",
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      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "440319249.60",
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      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "416138567.91",
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      },
      {
        "name": "LILLY ELI and CO",
        "value": "411618906.25",
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      {
        "name": "EXXON MOBIL CORP",
        "value": "298001348.40",
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      {
        "name": "JOHNSON&JOHNSON",
        "value": "273611045.25",
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      },
      {
        "name": "VISA INC-CLASS A",
        "value": "271416295.99",
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      },
      {
        "name": "WALMART INC",
        "value": "261076605.02",
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      },
      {
        "name": "MICRON TECHNOLOGY INC",
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      {
        "name": "MASTERCARD INC CL A",
        "value": "220777284.35",
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      },
      {
        "name": "COSTCO WHOLESALE CORP",
        "value": "208238107.75",
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      {
        "name": "ABBVIE INC",
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      },
      {
        "name": "ADV MICRO DEVICE",
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      {
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      {
        "name": "BANK OF AMERICA CORPORATION",
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      {
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      {
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      {
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        "name": "GENERAL ELECTRIC CO",
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      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "158598473.06",
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      },
      {
        "name": "CISCO SYSTEMS INC",
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      {
        "name": "CATERPILLAR INC",
        "value": "153733496.40",
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      },
      {
        "name": "LAM RESEARCH CORP",
        "value": "146541207.78",
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      },
      {
        "name": "COCA-COLA CO/THE",
        "value": "144697427.19",
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      {
        "name": "INTL BUS MACH CORP",
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      {
        "name": "WELLS FARGO & CO",
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      {
        "name": "GOLDMAN SACHS GROUP INC",
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      {
        "name": "PHILIP MORRIS INTL INC",
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      },
      {
        "name": "ORACLE CORP",
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      {
        "name": "MERCK & CO",
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      },
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      },
      {
        "name": "UNITEDHEALTH GRP",
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      },
      {
        "name": "MCDONALDS CORP",
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      },
      {
        "name": "MORGAN STANLEY",
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      },
      {
        "name": "THERMO FISHER SCIENTIFIC INC",
        "value": "108622455.30",
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      },
      {
        "name": "LINDE PLC",
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      },
      {
        "name": "PEPSICO INC",
        "value": "104963395.86",
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      },
      {
        "name": "INTEL CORP",
        "value": "104131555.98",
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      },
      {
        "name": "CITIGROUP INC",
        "value": "103454806.77",
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      },
      {
        "name": "SALESFORCE INC",
        "value": "101002487.04",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001004726-26-001922",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000100472626001922/0001004726-26-001922-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002126",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/819118/000003540226002126/0000035402-26-002126-index.htm"
    }
  ]
}