{
  "page": "compare",
  "query": {
    "a": "VSDB",
    "b": "LUTAX"
  },
  "retrieved_at": "2026-07-07T19:16:54+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": "VANGUARD SHORT DURATION BOND ETF",
    "ticker": "VSDB",
    "slug": "VSDB",
    "series_id": "S000091408",
    "html_url": "https://fundwatcher.app/funds/VSDB/"
  },
  "fund_b": {
    "name": "Columbia U.S. Treasury Index Fund",
    "ticker": "LUTAX",
    "slug": "LUTAX",
    "series_id": "S000012098",
    "html_url": "https://fundwatcher.app/funds/LUTAX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1890345710264022848426819103",
    "coverage_b_by_a": "0.1890345710264022848426819101",
    "shared_count": 54,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-01-31"
    },
    "a_top": [
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      },
      {
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      },
      {
        "name": "Fannie Mae Pool",
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      },
      {
        "name": "US TREASURY N/B",
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      },
      {
        "name": "Government National Mortgage Association, TBA",
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      {
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      {
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      },
      {
        "name": "FNCL 6.5 4/26",
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      {
        "name": "US TREASURY N/B",
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      },
      {
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      {
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      {
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      {
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      {
        "name": "Suci Second Investment Co.",
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      {
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      {
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      {
        "name": "TURKIYE REP OF",
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      {
        "name": "FNCL UMBS 6.0 CB5525 01-01-53",
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      {
        "name": "South Africa Government Bond",
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      {
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      {
        "name": "UNITED MEXICAN",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000836906-26-000272",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/836906/000083690626000272/0000836906-26-000272-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-033335",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/773757/000141036826033335/0001410368-26-033335-index.htm"
    }
  ]
}