{
  "page": "compare",
  "query": {
    "a": "RFAYX",
    "b": "LUTAX"
  },
  "retrieved_at": "2026-07-07T19:10:44+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": "Investment Grade Bond Fund",
    "ticker": "RFAYX",
    "slug": "RFAYX",
    "series_id": "S000001587",
    "html_url": "https://fundwatcher.app/funds/RFAYX/"
  },
  "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": "0.1658414211036055518740607737",
    "coverage_b_by_a": "0.1658414211036055518740607736",
    "shared_count": 65,
    "as_of": {
      "a": "2026-04-30",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "U.S. Cash Management Fund",
        "value": "86414129.86",
        "weight": "0.08475343",
        "shared": false
      },
      {
        "name": "G2SF 5 5/26",
        "value": "15268530.20",
        "weight": "0.01497510",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9656625.02",
        "weight": "0.00947105",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "8839974.16",
        "weight": "0.00867009",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7708289.10",
        "weight": "0.00756015",
        "shared": true
      },
      {
        "name": "BX Trust, Series 2024-BIO, Class C",
        "value": "7386134.82",
        "weight": "0.00724419",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7042030.64",
        "weight": "0.00690670",
        "shared": false
      },
      {
        "name": "Apna Park CLO DAC",
        "value": "6927981.57",
        "weight": "0.00679484",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6881995.00",
        "weight": "0.00674974",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6806389.33",
        "weight": "0.00667558",
        "shared": true
      },
      {
        "name": "BX Trust 2026-CART",
        "value": "6677258.17",
        "weight": "0.00654894",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6576814.98",
        "weight": "0.00645042",
        "shared": true
      },
      {
        "name": "Ginnie Mae II Pool",
        "value": "6554680.28",
        "weight": "0.00642871",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6532535.50",
        "weight": "0.00640699",
        "shared": true
      },
      {
        "name": "Fannie Mae Pool",
        "value": "6494407.64",
        "weight": "0.00636960",
        "shared": false
      },
      {
        "name": "Rre 28 Loan Management DAC",
        "value": "6329443.94",
        "weight": "0.00620781",
        "shared": false
      },
      {
        "name": "FREDDIE MAC POOL UMBS P#SD3482 5.50000000",
        "value": "6293302.04",
        "weight": "0.00617236",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6265676.52",
        "weight": "0.00614526",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6197056.88",
        "weight": "0.00607796",
        "shared": true
      },
      {
        "name": "Freddie Mac Pool",
        "value": "6191730.67",
        "weight": "0.00607274",
        "shared": false
      },
      {
        "name": "Freddie Mac Pool",
        "value": "6129773.56",
        "weight": "0.00601197",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6121568.00",
        "weight": "0.00600392",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6115894.06",
        "weight": "0.00599836",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5574500.03",
        "weight": "0.00546737",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5536987.50",
        "weight": "0.00543058",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5422450.73",
        "weight": "0.00531824",
        "shared": true
      },
      {
        "name": "FN FS3708",
        "value": "5386360.83",
        "weight": "0.00528285",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5322738.08",
        "weight": "0.00522045",
        "shared": false
      },
      {
        "name": "ARCREN 2026-FL1 A",
        "value": "5238019.37",
        "weight": "0.00513736",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5142829.84",
        "weight": "0.00504400",
        "shared": true
      },
      {
        "name": "BRCK Trust 2025-830B",
        "value": "5072803.64",
        "weight": "0.00497532",
        "shared": false
      },
      {
        "name": "TORY Commercial Mortgage Trust 2026-HGTS",
        "value": "5063035.34",
        "weight": "0.00496573",
        "shared": false
      },
      {
        "name": "FR RA7483",
        "value": "4732272.36",
        "weight": "0.00464133",
        "shared": false
      },
      {
        "name": "BDS LLC, Series 2025-FL16, Class A",
        "value": "4692882.49",
        "weight": "0.00460270",
        "shared": false
      },
      {
        "name": "Bravo Residential Funding Trust 2025-Ces1",
        "value": "4649233.83",
        "weight": "0.00455989",
        "shared": false
      },
      {
        "name": "Fannie Mae Pool",
        "value": "4440199.78",
        "weight": "0.00435487",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4418964.08",
        "weight": "0.00433404",
        "shared": true
      },
      {
        "name": "VDCUK 2024-1A A2",
        "value": "4389824.91",
        "weight": "0.00430546",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4379000.63",
        "weight": "0.00429485",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4271715.00",
        "weight": "0.00418962",
        "shared": false
      },
      {
        "name": "FANNIE MAE POOL FN 01/53 FIXED VAR",
        "value": "4255930.06",
        "weight": "0.00417414",
        "shared": false
      },
      {
        "name": "Federal National Mortgage Association, Inc.",
        "value": "4233935.04",
        "weight": "0.00415257",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4224932.81",
        "weight": "0.00414374",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4194558.15",
        "weight": "0.00411395",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4120256.88",
        "weight": "0.00404107",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4043172.66",
        "weight": "0.00396547",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "3980921.25",
        "weight": "0.00390442",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "3977204.69",
        "weight": "0.00390077",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "3667364.31",
        "weight": "0.00359689",
        "shared": true
      },
      {
        "name": "AM AIRAN 25-1A",
        "value": "3660266.12",
        "weight": "0.00358992",
        "shared": false
      }
    ],
    "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": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7020575.63",
        "weight": "0.00859902",
        "shared": false
      },
      {
        "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": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6258761.25",
        "weight": "0.00766592",
        "shared": false
      },
      {
        "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": true
      },
      {
        "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": true
      },
      {
        "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": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5395896.56",
        "weight": "0.00660906",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5323278.09",
        "weight": "0.00652011",
        "shared": false
      },
      {
        "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": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4434222.34",
        "weight": "0.00543117",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4429633.59",
        "weight": "0.00542555",
        "shared": false
      },
      {
        "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": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4311615.55",
        "weight": "0.00528100",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4212273.01",
        "weight": "0.00515932",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4190752.11",
        "weight": "0.00513296",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4188811.64",
        "weight": "0.00513058",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4179526.25",
        "weight": "0.00511921",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4179175.00",
        "weight": "0.00511878",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4170688.36",
        "weight": "0.00510839",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4150829.77",
        "weight": "0.00508406",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4147649.30",
        "weight": "0.00508017",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4129586.72",
        "weight": "0.00505804",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4129081.33",
        "weight": "0.00505742",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4125022.27",
        "weight": "0.00505245",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4110700.00",
        "weight": "0.00503491",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4110471.88",
        "weight": "0.00503463",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4105332.42",
        "weight": "0.00502834",
        "shared": false
      },
      {
        "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": false
      },
      {
        "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": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4040269.84",
        "weight": "0.00494865",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4038609.38",
        "weight": "0.00494661",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-063575",
      "as_of": "2026-04-30",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/351601/000141036826063575/0001410368-26-063575-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"
    }
  ]
}