{
  "page": "compare",
  "query": {
    "a": "PRTIX",
    "b": "FSIWX"
  },
  "retrieved_at": "2026-07-07T18:17:52+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": "T. Rowe Price U.S. Treasury Intermediate Index Fund",
    "ticker": "PRTIX",
    "slug": "PRTIX",
    "series_id": "S000002167",
    "html_url": "https://fundwatcher.app/funds/PRTIX/"
  },
  "fund_b": {
    "name": "Fidelity SAI Intermediate Treasury Bond Index Fund",
    "ticker": "FSIWX",
    "slug": "FSIWX",
    "series_id": "S000086561",
    "html_url": "https://fundwatcher.app/funds/FSIWX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.5101321332768654490475376569",
    "coverage_b_by_a": "0.5101321332768654490475376570",
    "shared_count": 24,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "US TREASURY N/B",
        "value": "30358500.00",
        "weight": "0.06544958",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "27464500.00",
        "weight": "0.05921044",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25878037.50",
        "weight": "0.05579020",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "20423125.00",
        "weight": "0.04403001",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "20045000.00",
        "weight": "0.04321481",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19417825.00",
        "weight": "0.04186269",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "19075117.19",
        "weight": "0.04112385",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19054350.00",
        "weight": "0.04107908",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18392367.19",
        "weight": "0.03965192",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18298563.28",
        "weight": "0.03944969",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18289058.59",
        "weight": "0.03942920",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16694431.25",
        "weight": "0.03599135",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "12657775.00",
        "weight": "0.02728877",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "12135699.22",
        "weight": "0.02616323",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "10865765.63",
        "weight": "0.02342539",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "10014391.41",
        "weight": "0.02158992",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "9464123.05",
        "weight": "0.02040361",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8574406.25",
        "weight": "0.01848548",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "8240927.34",
        "weight": "0.01776653",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "8225512.50",
        "weight": "0.01773330",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7218825.00",
        "weight": "0.01556299",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7099925.00",
        "weight": "0.01530666",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6950988.28",
        "weight": "0.01498557",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6914953.13",
        "weight": "0.01490788",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6816210.94",
        "weight": "0.01469500",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6763412.89",
        "weight": "0.01458117",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6721940.63",
        "weight": "0.01449176",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6526594.92",
        "weight": "0.01407062",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6442820.31",
        "weight": "0.01389001",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6405414.06",
        "weight": "0.01380937",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6119546.88",
        "weight": "0.01319307",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5720484.38",
        "weight": "0.01233273",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5039326.95",
        "weight": "0.01086423",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4936882.03",
        "weight": "0.01064337",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4802550.00",
        "weight": "0.01035377",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4714281.25",
        "weight": "0.01016347",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4471324.22",
        "weight": "0.00963968",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4427500.00",
        "weight": "0.00954520",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "3973429.69",
        "weight": "0.00856628",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "3853125.00",
        "weight": "0.00830691",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "3793248.05",
        "weight": "0.00817782",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "3116226.56",
        "weight": "0.00671824",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "3037750.00",
        "weight": "0.00654905",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "2509619.14",
        "weight": "0.00541046",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "1062239.06",
        "weight": "0.00229007",
        "shared": false
      },
      {
        "name": "T Rowe Price Government Reserve Investment Fund",
        "value": "626960.38",
        "weight": "0.00135166",
        "shared": false
      },
      {
        "name": "5-Year T-Note Futures, Jun-2026,ETH",
        "value": "84038.00",
        "weight": "0.00018118",
        "shared": false
      },
      {
        "name": "GINNIE MAE II POOL",
        "value": "39433.64",
        "weight": "0.00008501",
        "shared": false
      },
      {
        "name": "GINNIE MAE I POOL",
        "value": "27510.97",
        "weight": "0.00005931",
        "shared": false
      },
      {
        "name": "GNMA II POOL 004145 G2 05/38 FIXED 6",
        "value": "21008.49",
        "weight": "0.00004529",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "US TREASURY N/B",
        "value": "182978468.30",
        "weight": "0.04329593",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "176247183.02",
        "weight": "0.04170319",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "173255125.87",
        "weight": "0.04099522",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "169364056.23",
        "weight": "0.04007452",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "166793320.31",
        "weight": "0.03946624",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "162796418.33",
        "weight": "0.03852050",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "161649929.84",
        "weight": "0.03824922",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "155431122.12",
        "weight": "0.03677774",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "149378113.70",
        "weight": "0.03534550",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "140001328.13",
        "weight": "0.03312678",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "135342444.12",
        "weight": "0.03202441",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "129790884.94",
        "weight": "0.03071081",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "127479033.85",
        "weight": "0.03016379",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "126733440.79",
        "weight": "0.02998737",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "123766642.59",
        "weight": "0.02928537",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "122603632.26",
        "weight": "0.02901018",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "119381882.40",
        "weight": "0.02824786",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "118104205.41",
        "weight": "0.02794554",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "114977822.56",
        "weight": "0.02720578",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "110473372.50",
        "weight": "0.02613995",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "109087207.30",
        "weight": "0.02581196",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "106256775.09",
        "weight": "0.02514223",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "102659719.75",
        "weight": "0.02429110",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "93116620.64",
        "weight": "0.02203303",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "82028585.54",
        "weight": "0.01940941",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "71327151.99",
        "weight": "0.01687726",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "66858187.66",
        "weight": "0.01581983",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "65015411.95",
        "weight": "0.01538379",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "59645550.64",
        "weight": "0.01411319",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "58124144.25",
        "weight": "0.01375320",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "57466697.39",
        "weight": "0.01359763",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "53142851.43",
        "weight": "0.01257454",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "52246531.25",
        "weight": "0.01236245",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "51259236.45",
        "weight": "0.01212884",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "47404406.14",
        "weight": "0.01121672",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "47361671.88",
        "weight": "0.01120661",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "41789343.75",
        "weight": "0.00988810",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "37262484.47",
        "weight": "0.00881696",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "33162058.67",
        "weight": "0.00784673",
        "shared": false
      },
      {
        "name": "Fidelity Cash Central Fund",
        "value": "25475533.77",
        "weight": "0.00602796",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "24741040.96",
        "weight": "0.00585417",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "24155864.94",
        "weight": "0.00571570",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "23541542.85",
        "weight": "0.00557034",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "13591045.22",
        "weight": "0.00321588",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "12959606.66",
        "weight": "0.00306647",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001099263-26-004397",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/853437/000109926326004397/0001099263-26-004397-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002594",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/35315/000003540226002594/0000035402-26-002594-index.htm"
    }
  ]
}