{
  "page": "compare",
  "query": {
    "a": "CISIX",
    "b": "VSTIX"
  },
  "retrieved_at": "2026-07-07T16:33:44+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": "Calvert U.S. Large Cap Core Responsible Index Fund",
    "ticker": "CISIX",
    "slug": "CISIX",
    "series_id": "S000005145",
    "html_url": "https://fundwatcher.app/funds/CISIX/"
  },
  "fund_b": {
    "name": "Stock Index Fund",
    "ticker": "VSTIX",
    "slug": "VSTIX",
    "series_id": "S000008009",
    "html_url": "https://fundwatcher.app/funds/VSTIX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.7781023811359915018547631693",
    "coverage_b_by_a": "0.7781023811359915018547631693",
    "shared_count": 396,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-02-28"
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      },
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        "name": "ALPHABET INC CL A",
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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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      },
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        "name": "MASTERCARD INC CL A",
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      {
        "name": "NETFLIX INC",
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        "name": "BANK OF AMERICA CORPORATION",
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      },
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        "name": "CATERPILLAR INC",
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        "name": "ADV MICRO DEVICE",
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      {
        "name": "COCA-COLA CO/THE",
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        "name": "MERCK & CO",
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      },
      {
        "name": "CISCO SYSTEMS INC",
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      {
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        "name": "WELLS FARGO & CO",
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      {
        "name": "LINDE PLC",
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      },
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        "name": "APPLIED MATERIALS INC",
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      {
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        "name": "INTL BUS MACH CORP",
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        "name": "NEXTERA ENERGY INC",
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        "name": "AMGEN INC",
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        "name": "THERMO FISHER SCIENTIFIC INC",
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        "name": "KLA CORP",
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        "name": "UNION PACIFIC CORP",
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        "name": "AMPHENOL CORPORATION CL A",
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        "name": "ABBOTT LABS",
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        "name": "WALT DISNEY CO/T",
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        "name": "AMERICAN EXPRESS CO",
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      {
        "name": "INTEL CORP",
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        "name": "GILEAD SCIENCES INC",
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        "name": "SCHWAB CHARLES CORP",
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        "name": "TEXAS INSTRUMENTS INC",
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        "name": "TESLA INC",
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      {
        "name": "BERKSHIRE HATH-B",
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        "name": "EXXON MOBIL CORP",
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        "name": "JOHNSON&JOHNSON",
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        "name": "RTX CORP",
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        "name": "GOLDMAN SACHS GROUP INC",
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        "name": "INTL BUS MACH CORP",
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        "name": "VERIZON COMMUNICATIONS INC",
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        "name": "INTEL CORP",
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      {
        "name": "ABBOTT LABS",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-050769",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1105446/000141036826050769/0001410368-26-050769-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-041585",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/719423/000141036826041585/0001410368-26-041585-index.htm"
    }
  ]
}