{
  "page": "compare",
  "query": {
    "a": "FFBOX",
    "b": "SSAFX"
  },
  "retrieved_at": "2026-07-07T18:59:43+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": "Bond Fund of America",
    "ticker": "FFBOX",
    "slug": "FFBOX",
    "series_id": "S000009231",
    "html_url": "https://fundwatcher.app/funds/FFBOX/"
  },
  "fund_b": {
    "name": "State Street Aggregate Bond Index Portfolio",
    "ticker": "SSAFX",
    "slug": "SSAFX",
    "series_id": "S000046031",
    "html_url": "https://fundwatcher.app/funds/SSAFX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.2387578347489950373912725444",
    "coverage_b_by_a": "0.2387578347489950373912725446",
    "shared_count": 1259,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "CAPITAL GROUP CENTRAL CASH FUND",
        "value": "3888982192.89",
        "weight": "0.03835168",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "1418627317.13",
        "weight": "0.01398997",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1367914448.15",
        "weight": "0.01348986",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1256433908.00",
        "weight": "0.01239048",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "1223790229.20",
        "weight": "0.01206856",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "1034735104.00",
        "weight": "0.01020417",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "887594625.25",
        "weight": "0.00875312",
        "shared": true
      },
      {
        "name": "Uniform Mortgage-Backed Security, TBA",
        "value": "885422600.02",
        "weight": "0.00873170",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "820168833.91",
        "weight": "0.00808820",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "761797418.94",
        "weight": "0.00751256",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "739674743.40",
        "weight": "0.00729439",
        "shared": true
      },
      {
        "name": "FNCL 2 5/26",
        "value": "622519513.74",
        "weight": "0.00613905",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "620944111.56",
        "weight": "0.00612352",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "603117961.03",
        "weight": "0.00594772",
        "shared": true
      },
      {
        "name": "Eagle Funding LuxCo S.a.r.l.",
        "value": "572823306.00",
        "weight": "0.00564897",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "560921487.19",
        "weight": "0.00553160",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "529763441.82",
        "weight": "0.00522433",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "497843098.80",
        "weight": "0.00490954",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "492087124.09",
        "weight": "0.00485278",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
        "value": "470993439.28",
        "weight": "0.00464476",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "470245591.43",
        "weight": "0.00463739",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "467900888.43",
        "weight": "0.00461426",
        "shared": true
      },
      {
        "name": "FNCL 6 4/26",
        "value": "463358536.45",
        "weight": "0.00456947",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "429066642.96",
        "weight": "0.00423129",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "424543465.00",
        "weight": "0.00418669",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "420755509.11",
        "weight": "0.00414933",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "419491422.00",
        "weight": "0.00413687",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "407345800.65",
        "weight": "0.00401709",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "405193788.77",
        "weight": "0.00399587",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "375065801.72",
        "weight": "0.00369876",
        "shared": false
      },
      {
        "name": "FNCL 2.5 4/26",
        "value": "363528713.80",
        "weight": "0.00358498",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "348248269.21",
        "weight": "0.00343429",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "345542960.00",
        "weight": "0.00340761",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "345479069.03",
        "weight": "0.00340698",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "309424253.19",
        "weight": "0.00305143",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "307558879.53",
        "weight": "0.00303303",
        "shared": true
      },
      {
        "name": "USRE 2021-1 A1",
        "value": "301010147.27",
        "weight": "0.00296845",
        "shared": false
      },
      {
        "name": "FR SD8213",
        "value": "299434295.51",
        "weight": "0.00295291",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "298049940.27",
        "weight": "0.00293926",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "293584829.35",
        "weight": "0.00289522",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "288686439.38",
        "weight": "0.00284692",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "284009169.00",
        "weight": "0.00280079",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "278927737.33",
        "weight": "0.00275068",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "276849683.02",
        "weight": "0.00273019",
        "shared": true
      },
      {
        "name": "FNCL 5.5 4/26",
        "value": "270111173.22",
        "weight": "0.00266373",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "267936893.50",
        "weight": "0.00264229",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "265402231.97",
        "weight": "0.00261730",
        "shared": true
      },
      {
        "name": "IL ST TXB-PENSION",
        "value": "262877238.19",
        "weight": "0.00259240",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "257308893.60",
        "weight": "0.00253748",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "249172741.08",
        "weight": "0.00245725",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "State Street Navigator Securities Lending Portfolio II",
        "value": "364760549.86",
        "weight": "0.05686519",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "27712695.45",
        "weight": "0.00432034",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26294003.84",
        "weight": "0.00409916",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "26045015.63",
        "weight": "0.00406035",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "25834687.50",
        "weight": "0.00402756",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "24980468.75",
        "weight": "0.00389439",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "24411953.13",
        "weight": "0.00380576",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "23875312.56",
        "weight": "0.00372210",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "23853046.88",
        "weight": "0.00371863",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "22414218.75",
        "weight": "0.00349432",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "22314140.63",
        "weight": "0.00347871",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "22197656.25",
        "weight": "0.00346056",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "21941562.50",
        "weight": "0.00342063",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "21810937.50",
        "weight": "0.00340027",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "21592382.92",
        "weight": "0.00336619",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "20621679.69",
        "weight": "0.00321486",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "20246953.13",
        "weight": "0.00315645",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "20144453.13",
        "weight": "0.00314047",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "20029687.60",
        "weight": "0.00312257",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "19970312.60",
        "weight": "0.00311332",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19942187.60",
        "weight": "0.00310893",
        "shared": true
      },
      {
        "name": "FR RQ0041",
        "value": "19907331.62",
        "weight": "0.00310350",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19612500.00",
        "weight": "0.00305754",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19493906.25",
        "weight": "0.00303905",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19373554.79",
        "weight": "0.00302029",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "19286093.86",
        "weight": "0.00300665",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "18834375.00",
        "weight": "0.00293623",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18815918.06",
        "weight": "0.00293335",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18767187.60",
        "weight": "0.00292575",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "18188437.50",
        "weight": "0.00283553",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "18023046.88",
        "weight": "0.00280974",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17992968.84",
        "weight": "0.00280506",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17943750.00",
        "weight": "0.00279738",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17868632.92",
        "weight": "0.00278567",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17756718.84",
        "weight": "0.00276822",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17647500.00",
        "weight": "0.00275120",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "17178711.03",
        "weight": "0.00267812",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16982734.46",
        "weight": "0.00264756",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16972109.46",
        "weight": "0.00264591",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16792812.50",
        "weight": "0.00261795",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16622412.07",
        "weight": "0.00259139",
        "shared": true
      },
      {
        "name": "FN MA4465",
        "value": "16511533.36",
        "weight": "0.00257410",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16507734.38",
        "weight": "0.00257351",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16237656.25",
        "weight": "0.00253141",
        "shared": true
      },
      {
        "name": "FR SD8475",
        "value": "16202078.27",
        "weight": "0.00252586",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16201250.08",
        "weight": "0.00252573",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16115273.44",
        "weight": "0.00251233",
        "shared": false
      },
      {
        "name": "US TREASURY N/B",
        "value": "16054531.25",
        "weight": "0.00250286",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "16010000.00",
        "weight": "0.00249592",
        "shared": true
      },
      {
        "name": "US TREASURY N/B",
        "value": "15734296.88",
        "weight": "0.00245293",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001193125-26-245289",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/13075/000119312526245289/0001193125-26-245289-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-055492",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1107414/000141036826055492/0001410368-26-055492-index.htm"
    }
  ]
}