{
  "page": "compare",
  "query": {
    "a": "XFIV",
    "b": "IBTL"
  },
  "retrieved_at": "2026-07-07T18:01:14+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": "BondBloxx Bloomberg Five Year Target Duration US Treasury ETF",
    "ticker": "XFIV",
    "slug": "XFIV",
    "series_id": "S000077342",
    "html_url": "https://fundwatcher.app/funds/XFIV/"
  },
  "fund_b": {
    "name": "iShares iBonds Dec 2031 Term Treasury ETF",
    "ticker": "IBTL",
    "slug": "IBTL",
    "series_id": "S000072402",
    "html_url": "https://fundwatcher.app/funds/IBTL/"
  },
  "overlap": {
    "coverage_a_by_b": "0.3359161306764064843515258762",
    "coverage_b_by_a": "0.3359161306764064843515258763",
    "shared_count": 16,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "US TREASURY N/B",
        "value": "17719296.07",
        "weight": "0.04303437",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "16674167.25",
        "weight": "0.04049610",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "16129887.00",
        "weight": "0.03917422",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "15067274.96",
        "weight": "0.03659348",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "14872410.32",
        "weight": "0.03612022",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "14276681.28",
        "weight": "0.03467339",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "13966913.71",
        "weight": "0.03392107",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "12771725.41",
        "weight": "0.03101834",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "12222205.62",
        "weight": "0.02968374",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "9511206.16",
        "weight": "0.02309961",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9385780.13",
        "weight": "0.02279499",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9260291.05",
        "weight": "0.02249022",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9246773.25",
        "weight": "0.02245739",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9095671.87",
        "weight": "0.02209041",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "9012376.36",
        "weight": "0.02188811",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8775435.67",
        "weight": "0.02131266",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8689294.52",
        "weight": "0.02110345",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "8313821.88",
        "weight": "0.02019155",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8293695.31",
        "weight": "0.02014267",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8263285.53",
        "weight": "0.02006882",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "8180451.44",
        "weight": "0.01986764",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7984278.96",
        "weight": "0.01939120",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7957964.59",
        "weight": "0.01932729",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7866473.87",
        "weight": "0.01910509",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7779104.50",
        "weight": "0.01889290",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7690570.48",
        "weight": "0.01867788",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7458285.87",
        "weight": "0.01811374",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7350978.50",
        "weight": "0.01785312",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7331697.21",
        "weight": "0.01780629",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7105025.81",
        "weight": "0.01725578",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "7093331.88",
        "weight": "0.01722738",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "7060388.01",
        "weight": "0.01714737",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6554446.13",
        "weight": "0.01591861",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6418714.15",
        "weight": "0.01558896",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "6293461.18",
        "weight": "0.01528476",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6043399.34",
        "weight": "0.01467744",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "6013103.92",
        "weight": "0.01460386",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5967956.22",
        "weight": "0.01449421",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5879693.37",
        "weight": "0.01427985",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5626955.85",
        "weight": "0.01366604",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5563016.28",
        "weight": "0.01351075",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "5468924.50",
        "weight": "0.01328223",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5371929.46",
        "weight": "0.01304666",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5319040.87",
        "weight": "0.01291821",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "5295079.40",
        "weight": "0.01286002",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "4972334.09",
        "weight": "0.01207617",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "3439102.44",
        "weight": "0.00835245",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2590038.69",
        "weight": "0.00629036",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "2523558.73",
        "weight": "0.00612890",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "US TREASURY N/B",
        "value": "58072948.70",
        "weight": "0.11365302",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "56764043.98",
        "weight": "0.11109140",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "54472606.49",
        "weight": "0.10660689",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "54201512.25",
        "weight": "0.10607634",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26764889.19",
        "weight": "0.05238085",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26682263.47",
        "weight": "0.05221915",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26239816.35",
        "weight": "0.05135325",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26051762.61",
        "weight": "0.05098521",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26023810.88",
        "weight": "0.05093051",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25856572.38",
        "weight": "0.05060321",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25590388.40",
        "weight": "0.05008227",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25476209.89",
        "weight": "0.04985881",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25409410.63",
        "weight": "0.04972808",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "24363056.33",
        "weight": "0.04768029",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "23772576.56",
        "weight": "0.04652468",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "4566310.66",
        "weight": "0.00893661",
        "shared": true
      },
      {
        "name": "BlackRock Cash Funds: Treasury, SL Agency Shares",
        "value": "658857.43",
        "weight": "0.00128943",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001003715-26-001154",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1879238/000100371526001154/0001003715-26-001154-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-007319",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000207169126007319/0002071691-26-007319-index.htm"
    }
  ]
}