{
  "page": "compare",
  "query": {
    "a": "DBMIX",
    "b": "LUTAX"
  },
  "retrieved_at": "2026-07-07T18:20:56+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": "BNY Mellon Bond Market Index Fund",
    "ticker": "DBMIX",
    "slug": "DBMIX",
    "series_id": "S000000307",
    "html_url": "https://fundwatcher.app/funds/DBMIX/"
  },
  "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": "0.3884051796947230537397275816",
    "coverage_b_by_a": "0.3884051796947230537397275817",
    "shared_count": 214,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "DREYFUS INSTITUTIONAL PREFERRED GOVERNMENT PLUS MONEY MARKET FUND",
        "value": "20936978.73",
        "weight": "0.04326252",
        "shared": false
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "7199874.00",
        "weight": "0.01487725",
        "shared": false
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "6605675.14",
        "weight": "0.01364944",
        "shared": false
      },
      {
        "name": "DREYFUS INSTITUTIONAL PREFERRED GOVERNMENT PLUS MONEY MARKET FUND",
        "value": "5714092.32",
        "weight": "0.01180715",
        "shared": false
      },
      {
        "name": "TBA GNMA 30 YR 5.50000000",
        "value": "3260730.32",
        "weight": "0.00673772",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "3120307.23",
        "weight": "0.00644756",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2918098.43",
        "weight": "0.00602973",
        "shared": true
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "2822291.06",
        "weight": "0.00583176",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2762188.68",
        "weight": "0.00570757",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2692683.99",
        "weight": "0.00556395",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2617363.56",
        "weight": "0.00540831",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2598764.06",
        "weight": "0.00536988",
        "shared": true
      },
      {
        "name": "Government National Mortgage Association, TBA",
        "value": "2549991.15",
        "weight": "0.00526910",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2544319.54",
        "weight": "0.00525738",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2367280.28",
        "weight": "0.00489156",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2242813.47",
        "weight": "0.00463437",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2181915.81",
        "weight": "0.00450854",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2111580.07",
        "weight": "0.00436320",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2034144.52",
        "weight": "0.00420320",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2029785.94",
        "weight": "0.00419419",
        "shared": true
      },
      {
        "name": "Government National Mortgage Association, TBA",
        "value": "2020480.71",
        "weight": "0.00417496",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2007375.00",
        "weight": "0.00414788",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2006435.16",
        "weight": "0.00414594",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1891952.63",
        "weight": "0.00390938",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1877605.48",
        "weight": "0.00387974",
        "shared": true
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "1849923.93",
        "weight": "0.00382254",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "1808507.81",
        "weight": "0.00373696",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1798765.63",
        "weight": "0.00371683",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1738515.63",
        "weight": "0.00359233",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1710200.77",
        "weight": "0.00353382",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1709873.04",
        "weight": "0.00353315",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1707496.49",
        "weight": "0.00352824",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1706083.20",
        "weight": "0.00352532",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1685125.00",
        "weight": "0.00348201",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "1680972.08",
        "weight": "0.00347343",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1672906.25",
        "weight": "0.00345676",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1666242.19",
        "weight": "0.00344299",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1658480.59",
        "weight": "0.00342695",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1617718.75",
        "weight": "0.00334273",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1579884.36",
        "weight": "0.00326455",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1540591.02",
        "weight": "0.00318336",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1540458.99",
        "weight": "0.00318308",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1526150.68",
        "weight": "0.00315352",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1512195.70",
        "weight": "0.00312468",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1500658.59",
        "weight": "0.00310084",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1471084.57",
        "weight": "0.00303973",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1467411.32",
        "weight": "0.00303214",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1461256.25",
        "weight": "0.00301942",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1451208.40",
        "weight": "0.00299866",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1445803.90",
        "weight": "0.00298749",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "US TREASURY N/B",
        "value": "7364324.69",
        "weight": "0.00902005",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7226458.75",
        "weight": "0.00885119",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7147239.84",
        "weight": "0.00875416",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7137579.38",
        "weight": "0.00874232",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7020575.63",
        "weight": "0.00859902",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6964203.75",
        "weight": "0.00852997",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6960873.91",
        "weight": "0.00852589",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6878995.31",
        "weight": "0.00842560",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6455397.66",
        "weight": "0.00790677",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6258761.25",
        "weight": "0.00766592",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5915567.81",
        "weight": "0.00724557",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5747253.75",
        "weight": "0.00703941",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5740836.56",
        "weight": "0.00703155",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5740098.91",
        "weight": "0.00703065",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5736990.00",
        "weight": "0.00702684",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5695685.94",
        "weight": "0.00697625",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5677390.63",
        "weight": "0.00695384",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5673829.22",
        "weight": "0.00694948",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5620644.53",
        "weight": "0.00688434",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5409021.09",
        "weight": "0.00662513",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5395896.56",
        "weight": "0.00660906",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5323278.09",
        "weight": "0.00652011",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5262232.50",
        "weight": "0.00644534",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4656691.56",
        "weight": "0.00570366",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4434222.34",
        "weight": "0.00543117",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4429633.59",
        "weight": "0.00542555",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4358233.71",
        "weight": "0.00533810",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4329087.97",
        "weight": "0.00530240",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4311615.55",
        "weight": "0.00528100",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4212273.01",
        "weight": "0.00515932",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4190752.11",
        "weight": "0.00513296",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4188811.64",
        "weight": "0.00513058",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4179526.25",
        "weight": "0.00511921",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4179175.00",
        "weight": "0.00511878",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4170688.36",
        "weight": "0.00510839",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4150829.77",
        "weight": "0.00508406",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4147649.30",
        "weight": "0.00508017",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4129586.72",
        "weight": "0.00505804",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4129081.33",
        "weight": "0.00505742",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4125022.27",
        "weight": "0.00505245",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4110700.00",
        "weight": "0.00503491",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4110471.88",
        "weight": "0.00503463",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4105332.42",
        "weight": "0.00502834",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4082361.72",
        "weight": "0.00500020",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4079134.30",
        "weight": "0.00499625",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4067402.34",
        "weight": "0.00498188",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4064365.00",
        "weight": "0.00497816",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4042121.48",
        "weight": "0.00495091",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4040269.84",
        "weight": "0.00494865",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4038609.38",
        "weight": "0.00494661",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000940400-26-011320",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/819940/000094040026011320/0000940400-26-011320-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"
    }
  ]
}