{
  "page": "compare",
  "query": {
    "a": "MBB",
    "b": "EUSB"
  },
  "retrieved_at": "2026-07-07T15:43:24+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": "iShares MBS ETF",
    "ticker": "MBB",
    "slug": "MBB",
    "series_id": "S000013702",
    "html_url": "https://fundwatcher.app/funds/MBB/"
  },
  "fund_b": {
    "name": "iShares ESG Advanced Universal USD Bond ETF",
    "ticker": "EUSB",
    "slug": "EUSB",
    "series_id": "S000068817",
    "html_url": "https://fundwatcher.app/funds/EUSB/"
  },
  "overlap": {
    "coverage_a_by_b": "0.1405877285472332490940302063",
    "coverage_b_by_a": "0.1405877285472332490940302060",
    "shared_count": 376,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "BlackRock Cash Funds: Treasury, SL Agency Shares",
        "value": "2349848882.32",
        "weight": "0.05655290",
        "shared": true
      },
      {
        "name": "FR SD8146",
        "value": "427589929.06",
        "weight": "0.01029064",
        "shared": true
      },
      {
        "name": "GNII II 5.5% 03/01/2056 #TBA",
        "value": "399517163.25",
        "weight": "0.00961502",
        "shared": true
      },
      {
        "name": "FNCL 5 3/24",
        "value": "227789172.20",
        "weight": "0.00548211",
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      },
      {
        "name": "G2 MA7648",
        "value": "221285634.59",
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      },
      {
        "name": "G2 MA7766",
        "value": "217494998.47",
        "weight": "0.00523437",
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      },
      {
        "name": "FN MA4492",
        "value": "212474536.60",
        "weight": "0.00511354",
        "shared": false
      },
      {
        "name": "G2SF 5 3/25",
        "value": "209896727.56",
        "weight": "0.00505150",
        "shared": true
      },
      {
        "name": "FR SD8140",
        "value": "204523050.63",
        "weight": "0.00492218",
        "shared": true
      },
      {
        "name": "FNCL 5.5 3/25",
        "value": "197749445.88",
        "weight": "0.00475916",
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      },
      {
        "name": "G2 MA7472",
        "value": "185938026.36",
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      },
      {
        "name": "Government National Mortgage Association, TBA",
        "value": "181046291.07",
        "weight": "0.00435717",
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      },
      {
        "name": "FN MA4465",
        "value": "180370505.38",
        "weight": "0.00434091",
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      },
      {
        "name": "Uniform Mortgage-Backed Securities",
        "value": "178332612.01",
        "weight": "0.00429186",
        "shared": false
      },
      {
        "name": "G2 MB0025",
        "value": "168453696.80",
        "weight": "0.00405411",
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      },
      {
        "name": "G2 MA7935",
        "value": "148438446.26",
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      },
      {
        "name": "G2 MA7367",
        "value": "144659079.64",
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      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "140022705.46",
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      },
      {
        "name": "FR SD8199",
        "value": "139528303.51",
        "weight": "0.00335797",
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      },
      {
        "name": "FN MA4281",
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        "weight": "0.00320581",
        "shared": true
      },
      {
        "name": "Fannie Mae Pool",
        "value": "133096404.12",
        "weight": "0.00320318",
        "shared": false
      },
      {
        "name": "G2 MA9171",
        "value": "130718959.53",
        "weight": "0.00314596",
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      },
      {
        "name": "FN MA4437",
        "value": "127597398.48",
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      },
      {
        "name": "G2 MA7826",
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      },
      {
        "name": "G2 MA7534",
        "value": "123557203.52",
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      },
      {
        "name": "FN MA4305",
        "value": "120559723.67",
        "weight": "0.00290146",
        "shared": true
      },
      {
        "name": "Fannie Mae Pool",
        "value": "115619322.46",
        "weight": "0.00278257",
        "shared": false
      },
      {
        "name": "G2 MA7936",
        "value": "115515880.49",
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      },
      {
        "name": "G2 MA7051",
        "value": "114056581.14",
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      },
      {
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      },
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        "value": "109076526.13",
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      },
      {
        "name": "FR SD8324",
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      },
      {
        "name": "FNCL 6 3/24",
        "value": "101312358.87",
        "weight": "0.00243825",
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      },
      {
        "name": "G2 MB0624",
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      },
      {
        "name": "FR SD8182",
        "value": "96947222.98",
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      },
      {
        "name": "FANNIE MAE POOL FN 05/52 FIXED VAR",
        "value": "93078582.60",
        "weight": "0.00224009",
        "shared": false
      },
      {
        "name": "G2 MA9781",
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      },
      {
        "name": "G2 MA7987",
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      },
      {
        "name": "G2 MA7589",
        "value": "91465086.29",
        "weight": "0.00220125",
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      },
      {
        "name": "FR SD8134",
        "value": "90692946.45",
        "weight": "0.00218267",
        "shared": false
      },
      {
        "name": "FR SD8362",
        "value": "90321930.34",
        "weight": "0.00217374",
        "shared": false
      },
      {
        "name": "Uniform Mortgage-Backed Securities",
        "value": "87655418.50",
        "weight": "0.00210957",
        "shared": false
      },
      {
        "name": "Uniform Mortgage-Backed Securities",
        "value": "87111954.59",
        "weight": "0.00209649",
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      },
      {
        "name": "FR RA5205",
        "value": "87091149.17",
        "weight": "0.00209599",
        "shared": false
      },
      {
        "name": "FNCL UMBS 3.0 CA9308 02-01-51",
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        "weight": "0.00206123",
        "shared": false
      },
      {
        "name": "G2 MA9852",
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        "weight": "0.00204082",
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      },
      {
        "name": "Uniform Mortgage-Backed Securities",
        "value": "82184209.52",
        "weight": "0.00197790",
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      },
      {
        "name": "G2 MB0091",
        "value": "80607537.41",
        "weight": "0.00193995",
        "shared": false
      },
      {
        "name": "Freddie Mac Pool",
        "value": "79799967.76",
        "weight": "0.00192051",
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      },
      {
        "name": "FR SD8234",
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        "weight": "0.00187213",
        "shared": false
      }
    ],
    "b_top": [
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        "name": "BlackRock Cash Funds: Treasury, SL Agency Shares",
        "value": "29802697.25",
        "weight": "0.04023555",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
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      },
      {
        "name": "US TREASURY N/B",
        "value": "2954000.00",
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      },
      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
        "value": "2919127.50",
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      },
      {
        "name": "G2 MA7135",
        "value": "2905971.32",
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      {
        "name": "US TREASURY N/B",
        "value": "2875248.75",
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      {
        "name": "US TREASURY N/B",
        "value": "2812950.16",
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      {
        "name": "US TREASURY N/B",
        "value": "2807194.33",
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      {
        "name": "US TREASURY N/B",
        "value": "2786215.09",
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      {
        "name": "US TREASURY N/B",
        "value": "2769187.50",
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      {
        "name": "US TREASURY N/B",
        "value": "2671747.03",
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      {
        "name": "US TREASURY N/B",
        "value": "2592562.50",
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        "name": "G2 MA7705",
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      {
        "name": "US TREASURY N/B",
        "value": "2448506.25",
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      {
        "name": "US TREASURY N/B",
        "value": "2380050.00",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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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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        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      },
      {
        "name": "Uniform Mortgage-Backed Securities",
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      {
        "name": "US TREASURY N/B",
        "value": "1809285.17",
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
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      {
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      {
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      {
        "name": "US TREASURY N/B",
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      {
        "name": "US TREASURY N/B",
        "value": "1726450.00",
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      {
        "name": "US TREASURY N/B",
        "value": "1726054.69",
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      },
      {
        "name": "US TREASURY N/B",
        "value": "1715935.09",
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      },
      {
        "name": "GNII II 5.5% 03/01/2056 #TBA",
        "value": "1696375.38",
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      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-039527",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000141036826039527/0001410368-26-039527-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-039522",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000141036826039522/0001410368-26-039522-index.htm"
    }
  ]
}