{
  "page": "compare",
  "query": {
    "a": "FXAIX",
    "b": "CIK0000884394"
  },
  "retrieved_at": "2026-07-07T08:46:11+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 500 Index Fund",
    "ticker": "FXAIX",
    "slug": "FXAIX",
    "series_id": "S000006027",
    "html_url": "https://fundwatcher.app/funds/FXAIX/"
  },
  "fund_b": {
    "name": "SPDR S&P 500 ETF TRUST",
    "ticker": "",
    "slug": "CIK0000884394",
    "series_id": "CIK0000884394",
    "html_url": "https://fundwatcher.app/funds/CIK0000884394/"
  },
  "overlap": {
    "coverage_a_by_b": "0.9736373626163593870667472922",
    "coverage_b_by_a": "0.9736373626163593870667472922",
    "shared_count": 499,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "NVIDIA CORP",
        "value": "54795653828.76",
        "weight": "0.07302956",
        "shared": true
      },
      {
        "name": "APPLE INC",
        "value": "49678425535.20",
        "weight": "0.06620951",
        "shared": true
      },
      {
        "name": "MICROSOFT CORP",
        "value": "37147839564.34",
        "weight": "0.04950923",
        "shared": true
      },
      {
        "name": "AMAZON.COM INC",
        "value": "25998469770.00",
        "weight": "0.03464977",
        "shared": true
      },
      {
        "name": "ALPHABET INC CL A",
        "value": "23083375072.32",
        "weight": "0.03076464",
        "shared": true
      },
      {
        "name": "BROADCOM INC",
        "value": "19204322930.10",
        "weight": "0.02559479",
        "shared": true
      },
      {
        "name": "ALPHABET INC CL C",
        "value": "18429356703.66",
        "weight": "0.02456194",
        "shared": true
      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "17965197354.78",
        "weight": "0.02394333",
        "shared": true
      },
      {
        "name": "TESLA INC",
        "value": "14393775310.44",
        "weight": "0.01918348",
        "shared": true
      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "11783800516.55",
        "weight": "0.01570500",
        "shared": true
      },
      {
        "name": "LILLY ELI and CO",
        "value": "10631627649.94",
        "weight": "0.01416943",
        "shared": true
      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "10403650857.60",
        "weight": "0.01386559",
        "shared": true
      },
      {
        "name": "EXXON MOBIL CORP",
        "value": "8184480257.50",
        "weight": "0.01090796",
        "shared": true
      },
      {
        "name": "JOHNSON&JOHNSON",
        "value": "7617187504.29",
        "weight": "0.01015190",
        "shared": true
      },
      {
        "name": "WALMART INC",
        "value": "7140312957.30",
        "weight": "0.00951634",
        "shared": true
      },
      {
        "name": "VISA INC-CLASS A",
        "value": "6875712408.70",
        "weight": "0.00916369",
        "shared": true
      },
      {
        "name": "MICRON TECHNOLOGY INC",
        "value": "5890618439.93",
        "weight": "0.00785079",
        "shared": true
      },
      {
        "name": "COSTCO WHOLESALE CORP",
        "value": "5700863686.32",
        "weight": "0.00759789",
        "shared": true
      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "5397078074.64",
        "weight": "0.00719302",
        "shared": true
      },
      {
        "name": "ABBVIE INC",
        "value": "5219987687.28",
        "weight": "0.00695700",
        "shared": true
      },
      {
        "name": "NETFLIX INC",
        "value": "5189765290.08",
        "weight": "0.00691672",
        "shared": true
      },
      {
        "name": "PROCTER & GAMBLE",
        "value": "4972171362.40",
        "weight": "0.00662672",
        "shared": true
      },
      {
        "name": "HOME DEPOT INC",
        "value": "4822787351.68",
        "weight": "0.00642763",
        "shared": true
      },
      {
        "name": "GENERAL ELECTRIC CO",
        "value": "4594440055.80",
        "weight": "0.00612329",
        "shared": true
      },
      {
        "name": "CHEVRON CORP",
        "value": "4498508663.60",
        "weight": "0.00599544",
        "shared": true
      },
      {
        "name": "CATERPILLAR INC",
        "value": "4424021375.73",
        "weight": "0.00589617",
        "shared": true
      },
      {
        "name": "BANK OF AMERICA CORPORATION",
        "value": "4260401516.58",
        "weight": "0.00567810",
        "shared": true
      },
      {
        "name": "ADV MICRO DEVICE",
        "value": "4148126364.17",
        "weight": "0.00552846",
        "shared": true
      },
      {
        "name": "COCA-COLA CO/THE",
        "value": "4018381842.12",
        "weight": "0.00535555",
        "shared": true
      },
      {
        "name": "PALANTIR TECHNOLOGIES INC",
        "value": "3988252547.85",
        "weight": "0.00531539",
        "shared": true
      },
      {
        "name": "CISCO SYSTEMS INC",
        "value": "3984972238.20",
        "weight": "0.00531102",
        "shared": true
      },
      {
        "name": "MERCK & CO",
        "value": "3911083890.82",
        "weight": "0.00521254",
        "shared": true
      },
      {
        "name": "APPLIED MATERIALS INC",
        "value": "3774477548.70",
        "weight": "0.00503048",
        "shared": true
      },
      {
        "name": "LAM RESEARCH CORP",
        "value": "3738628270.62",
        "weight": "0.00498270",
        "shared": true
      },
      {
        "name": "PHILIP MORRIS INTL INC",
        "value": "3701135368.91",
        "weight": "0.00493273",
        "shared": true
      },
      {
        "name": "RTX CORP",
        "value": "3457305667.86",
        "weight": "0.00460777",
        "shared": true
      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "3380797497.45",
        "weight": "0.00450580",
        "shared": true
      },
      {
        "name": "GOLDMAN SACHS GROUP INC",
        "value": "3280953762.47",
        "weight": "0.00437273",
        "shared": true
      },
      {
        "name": "WELLS FARGO & CO",
        "value": "3253828212.45",
        "weight": "0.00433658",
        "shared": true
      },
      {
        "name": "ORACLE CORP",
        "value": "3112308810.00",
        "weight": "0.00414797",
        "shared": true
      },
      {
        "name": "MCDONALDS CORP",
        "value": "3091044174.06",
        "weight": "0.00411963",
        "shared": true
      },
      {
        "name": "LINDE PLC",
        "value": "3019267940.40",
        "weight": "0.00402397",
        "shared": true
      },
      {
        "name": "GE VERNOVA LLC",
        "value": "3016442083.20",
        "weight": "0.00402020",
        "shared": true
      },
      {
        "name": "PEPSICO INC",
        "value": "2953665429.84",
        "weight": "0.00393653",
        "shared": true
      },
      {
        "name": "INTL BUS MACH CORP",
        "value": "2857459851.54",
        "weight": "0.00380831",
        "shared": true
      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "2690476800.60",
        "weight": "0.00358576",
        "shared": true
      },
      {
        "name": "AMGEN INC",
        "value": "2660000703.36",
        "weight": "0.00354515",
        "shared": true
      },
      {
        "name": "INTEL CORP",
        "value": "2602596862.19",
        "weight": "0.00346864",
        "shared": true
      },
      {
        "name": "ABBOTT LABS",
        "value": "2574746149.30",
        "weight": "0.00343152",
        "shared": true
      },
      {
        "name": "MORGAN STANLEY",
        "value": "2559544764.18",
        "weight": "0.00341126",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "NVIDIA CORP",
        "value": "49374840753.60",
        "weight": "0.07581143",
        "shared": true
      },
      {
        "name": "APPLE INC",
        "value": "43409536690.37",
        "weight": "0.06665214",
        "shared": true
      },
      {
        "name": "MICROSOFT CORP",
        "value": "32024467977.39",
        "weight": "0.04917121",
        "shared": true
      },
      {
        "name": "AMAZON.COM INC",
        "value": "23704505597.29",
        "weight": "0.03639652",
        "shared": true
      },
      {
        "name": "ALPHABET INC CL A",
        "value": "19504620830.24",
        "weight": "0.02994791",
        "shared": true
      },
      {
        "name": "BROADCOM INC",
        "value": "17097554628.18",
        "weight": "0.02625203",
        "shared": true
      },
      {
        "name": "ALPHABET INC CL C",
        "value": "15630450055.08",
        "weight": "0.02399940",
        "shared": true
      },
      {
        "name": "META PLATFORMS INC CL A",
        "value": "14579501254.11",
        "weight": "0.02238575",
        "shared": true
      },
      {
        "name": "TESLA INC",
        "value": "12180150830.00",
        "weight": "0.01870172",
        "shared": true
      },
      {
        "name": "BERKSHIRE HATH-B",
        "value": "10236784928.80",
        "weight": "0.01571783",
        "shared": true
      },
      {
        "name": "JPMORGAN CHASE and CO",
        "value": "9239254967.04",
        "weight": "0.01418619",
        "shared": true
      },
      {
        "name": "LILLY ELI and CO",
        "value": "8490512761.02",
        "weight": "0.01303656",
        "shared": true
      },
      {
        "name": "EXXON MOBIL CORP",
        "value": "8259293958.70",
        "weight": "0.01268154",
        "shared": true
      },
      {
        "name": "JOHNSON&JOHNSON",
        "value": "6861992767.56",
        "weight": "0.01053608",
        "shared": true
      },
      {
        "name": "WALMART INC",
        "value": "6346060052.28",
        "weight": "0.00974391",
        "shared": true
      },
      {
        "name": "VISA INC-CLASS A",
        "value": "5918523523.52",
        "weight": "0.00908746",
        "shared": true
      },
      {
        "name": "COSTCO WHOLESALE CORP",
        "value": "5156016074.27",
        "weight": "0.00791668",
        "shared": true
      },
      {
        "name": "MASTERCARD INC CL A",
        "value": "4739777258.30",
        "weight": "0.00727758",
        "shared": true
      },
      {
        "name": "NETFLIX INC",
        "value": "4728498833.25",
        "weight": "0.00726026",
        "shared": true
      },
      {
        "name": "CHEVRON CORP",
        "value": "4517364598.50",
        "weight": "0.00693608",
        "shared": true
      },
      {
        "name": "ABBVIE INC",
        "value": "4477156706.75",
        "weight": "0.00687434",
        "shared": true
      },
      {
        "name": "MICRON TECHNOLOGY INC",
        "value": "4430204704.48",
        "weight": "0.00680225",
        "shared": true
      },
      {
        "name": "PROCTER & GAMBLE",
        "value": "3909712030.80",
        "weight": "0.00600307",
        "shared": true
      },
      {
        "name": "PALANTIR TECHNOLOGIES INC",
        "value": "3891995601.84",
        "weight": "0.00597587",
        "shared": true
      },
      {
        "name": "ADV MICRO DEVICE",
        "value": "3866385087.39",
        "weight": "0.00593655",
        "shared": true
      },
      {
        "name": "CATERPILLAR INC",
        "value": "3839327522.68",
        "weight": "0.00589500",
        "shared": true
      },
      {
        "name": "HOME DEPOT INC",
        "value": "3813394696.38",
        "weight": "0.00585519",
        "shared": true
      },
      {
        "name": "BANK OF AMERICA CORPORATION",
        "value": "3767509053.75",
        "weight": "0.00578473",
        "shared": true
      },
      {
        "name": "CISCO SYSTEMS INC",
        "value": "3573084598.01",
        "weight": "0.00548621",
        "shared": true
      },
      {
        "name": "MERCK & CO",
        "value": "3477189108.22",
        "weight": "0.00533897",
        "shared": true
      },
      {
        "name": "GENERAL ELECTRIC CO",
        "value": "3466330005.60",
        "weight": "0.00532229",
        "shared": true
      },
      {
        "name": "COCA-COLA CO/THE",
        "value": "3429025294.50",
        "weight": "0.00526502",
        "shared": true
      },
      {
        "name": "APPLIED MATERIALS INC",
        "value": "3159555977.76",
        "weight": "0.00485127",
        "shared": true
      },
      {
        "name": "LAM RESEARCH CORP",
        "value": "3107441768.58",
        "weight": "0.00477125",
        "shared": true
      },
      {
        "name": "RTX CORP",
        "value": "3015532012.20",
        "weight": "0.00463013",
        "shared": true
      },
      {
        "name": "PHILIP MORRIS INTL INC",
        "value": "2997424059.00",
        "weight": "0.00460232",
        "shared": true
      },
      {
        "name": "GOLDMAN SACHS GROUP INC",
        "value": "2954848492.30",
        "weight": "0.00453695",
        "shared": true
      },
      {
        "name": "ORACLE CORP",
        "value": "2906413727.18",
        "weight": "0.00446258",
        "shared": true
      },
      {
        "name": "WELLS FARGO & CO",
        "value": "2867145711.34",
        "weight": "0.00440229",
        "shared": true
      },
      {
        "name": "UNITEDHEALTH GRP",
        "value": "2854551051.81",
        "weight": "0.00438295",
        "shared": true
      },
      {
        "name": "GE VERNOVA LLC",
        "value": "2739912639.80",
        "weight": "0.00420693",
        "shared": true
      },
      {
        "name": "LINDE PLC",
        "value": "2695872977.84",
        "weight": "0.00413931",
        "shared": true
      },
      {
        "name": "INTL BUS MACH CORP",
        "value": "2638541677.58",
        "weight": "0.00405129",
        "shared": true
      },
      {
        "name": "MCDONALDS CORP",
        "value": "2577406954.78",
        "weight": "0.00395742",
        "shared": true
      },
      {
        "name": "PEPSICO INC",
        "value": "2471342362.01",
        "weight": "0.00379456",
        "shared": true
      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "2465124914.80",
        "weight": "0.00378502",
        "shared": true
      },
      {
        "name": "INTEL CORP",
        "value": "2414131694.13",
        "weight": "0.00370672",
        "shared": true
      },
      {
        "name": "AT&T INC",
        "value": "2363179221.52",
        "weight": "0.00362849",
        "shared": true
      },
      {
        "name": "CITIGROUP INC",
        "value": "2307688568.13",
        "weight": "0.00354329",
        "shared": true
      },
      {
        "name": "MORGAN STANLEY",
        "value": "2305458167.74",
        "weight": "0.00353986",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-002559",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/819118/000003540226002559/0000035402-26-002559-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-055357",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/884394/000141036826055357/0001410368-26-055357-index.htm"
    }
  ]
}