{
  "page": "compare",
  "query": {
    "a": "FIPDX",
    "b": "TIPX"
  },
  "retrieved_at": "2026-07-07T15:23:25+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": "Fidelity Inflation-Protected Bond Index Fund",
    "ticker": "FIPDX",
    "slug": "FIPDX",
    "series_id": "S000037003",
    "html_url": "https://fundwatcher.app/funds/FIPDX/"
  },
  "fund_b": {
    "name": "State Street(R) SPDR(R) Bloomberg 1-10 Year TIPS ETF",
    "ticker": "TIPX",
    "slug": "TIPX",
    "series_id": "S000040742",
    "html_url": "https://fundwatcher.app/funds/TIPX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.8317578950850262135671116247",
    "coverage_b_by_a": "0.8317578950850262135671116247",
    "shared_count": 31,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-03-31"
    },
    "a_top": [
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "461554001.81",
        "weight": "0.04048995",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "456821049.64",
        "weight": "0.04007475",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "453279507.52",
        "weight": "0.03976407",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.375 07/15/33",
        "value": "416931858.57",
        "weight": "0.03657546",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 07/15/2032",
        "value": "401589206.97",
        "weight": "0.03522952",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 04/15/2027",
        "value": "390744824.08",
        "weight": "0.03427820",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "375953379.03",
        "weight": "0.03298061",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Notes 1.75%, Due 01/15/2034",
        "value": "372052977.54",
        "weight": "0.03263845",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 01/15/2031",
        "value": "369294282.44",
        "weight": "0.03239644",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "354557038.98",
        "weight": "0.03110361",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2.375% 10/15/2028",
        "value": "354423997.32",
        "weight": "0.03109194",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.125% 01/15/2033",
        "value": "352960991.65",
        "weight": "0.03096360",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .125 07/15/2030",
        "value": "351589797.67",
        "weight": "0.03084331",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 07/15/2031",
        "value": "341802161.52",
        "weight": "0.02998469",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "337233680.40",
        "weight": "0.02958392",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes 0.125%, Due 1/15/2030",
        "value": "325615098.62",
        "weight": "0.02856467",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.250 04/15/2028",
        "value": "323731099.34",
        "weight": "0.02839940",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Linked Notes",
        "value": "320839539.72",
        "weight": "0.02814574",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .25%  07/15/29",
        "value": "317971022.15",
        "weight": "0.02789410",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/2% 01/15/2028",
        "value": "316444638.82",
        "weight": "0.02776019",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-5/8% 10/15/27",
        "value": "315170838.19",
        "weight": "0.02764845",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8%  01/15/32",
        "value": "307300174.64",
        "weight": "0.02695799",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 07/15/2028",
        "value": "274136731.60",
        "weight": "0.02404872",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2027",
        "value": "237738022.92",
        "weight": "0.02085563",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-5/8% 04/15/28",
        "value": "201963633.70",
        "weight": "0.01771732",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .875% 01/15/2029",
        "value": "190578190.66",
        "weight": "0.01671852",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Indexed Notes",
        "value": "168448424.83",
        "weight": "0.01477718",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2-1/2% 01/15/29",
        "value": "158814981.43",
        "weight": "0.01393209",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-3/8% 02/15/2044",
        "value": "157047120.15",
        "weight": "0.01377700",
        "shared": false
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
        "value": "150384294.82",
        "weight": "0.01319250",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-7/8% 04/15/29",
        "value": "146361493.62",
        "weight": "0.01283960",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 02/15/2045",
        "value": "140682386.68",
        "weight": "0.01234140",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.50% 2/15/2053",
        "value": "128827105.48",
        "weight": "0.01130139",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 02/15/2042",
        "value": "128818748.59",
        "weight": "0.01130066",
        "shared": false
      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "125312500.00",
        "weight": "0.01099307",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-7/8% 02/15/2047",
        "value": "109321510.99",
        "weight": "0.00959026",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 02/15/2043",
        "value": "105215318.08",
        "weight": "0.00923004",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-3/8% 04/15/32",
        "value": "103838677.66",
        "weight": "0.00910928",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0.25% 02/15/2050",
        "value": "90829348.29",
        "weight": "0.00796803",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-3/4% 01/15/28",
        "value": "90100664.05",
        "weight": "0.00790411",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
        "value": "88804469.22",
        "weight": "0.00779040",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8%  02/15/2052",
        "value": "79131589.93",
        "weight": "0.00694184",
        "shared": false
      },
      {
        "name": "U.S. Treasury Inflation-Protected Notes 2.125%, Due 02/15/2054",
        "value": "78449765.15",
        "weight": "0.00688203",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2 1/8% 02/15/40",
        "value": "74462889.53",
        "weight": "0.00653228",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1% 02/15/48",
        "value": "73146822.86",
        "weight": "0.00641683",
        "shared": false
      },
      {
        "name": "UNITED STATES TREASURY INFLATION INDEXED BONDS I/L 2.375% 02-15-56",
        "value": "65587185.08",
        "weight": "0.00575365",
        "shared": false
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Bonds",
        "value": "63028523.43",
        "weight": "0.00552919",
        "shared": false
      },
      {
        "name": "Fidelity Cash Central Fund",
        "value": "61658471.96",
        "weight": "0.00540901",
        "shared": false
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1% 02/15/46",
        "value": "60947178.16",
        "weight": "0.00534661",
        "shared": false
      },
      {
        "name": "U.S. Treasury Inflation Linked Bonds",
        "value": "27725985.55",
        "weight": "0.00243227",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "U.S. Treasury Notes",
        "value": "82858222.79",
        "weight": "0.04412051",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "78025724.86",
        "weight": "0.04154730",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "76035285.67",
        "weight": "0.04048742",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "73635293.10",
        "weight": "0.03920947",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Linked Notes",
        "value": "73474919.27",
        "weight": "0.03912407",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8%  01/15/32",
        "value": "73370954.69",
        "weight": "0.03906871",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 07/15/2031",
        "value": "70009120.70",
        "weight": "0.03727860",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes 0.125%, Due 1/15/2030",
        "value": "67128924.47",
        "weight": "0.03574495",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Notes 1.75%, Due 01/15/2034",
        "value": "66518830.38",
        "weight": "0.03542008",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Protected Indexed Notes",
        "value": "66425544.35",
        "weight": "0.03537041",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.125% 01/15/2033",
        "value": "66239653.44",
        "weight": "0.03527142",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .125 07/15/2030",
        "value": "66215779.17",
        "weight": "0.03525871",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .25%  07/15/29",
        "value": "64537072.35",
        "weight": "0.03436483",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2.375% 10/15/2028",
        "value": "63800047.59",
        "weight": "0.03397238",
        "shared": true
      },
      {
        "name": "U.S. Treasury Notes",
        "value": "63770475.74",
        "weight": "0.03395663",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 01/15/2031",
        "value": "63424406.62",
        "weight": "0.03377236",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-5/8% 07/15/2032",
        "value": "63384643.38",
        "weight": "0.03375118",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/4% 07/15/2028",
        "value": "63078487.00",
        "weight": "0.03358816",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/2% 01/15/2028",
        "value": "61886956.39",
        "weight": "0.03295369",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-3/8% 07/15/2027",
        "value": "61169442.73",
        "weight": "0.03257163",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.375 07/15/33",
        "value": "60945105.45",
        "weight": "0.03245217",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1.250 04/15/2028",
        "value": "59363054.71",
        "weight": "0.03160976",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 0-1/8% 04/15/2027",
        "value": "57032383.76",
        "weight": "0.03036872",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-5/8% 10/15/27",
        "value": "56993554.70",
        "weight": "0.03034804",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-7/8% 04/15/29",
        "value": "55732972.35",
        "weight": "0.02967681",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES .875% 01/15/2029",
        "value": "54877771.98",
        "weight": "0.02922143",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-5/8% 04/15/28",
        "value": "48163132.34",
        "weight": "0.02564600",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 1-3/4% 01/15/28",
        "value": "31735522.65",
        "weight": "0.01689860",
        "shared": true
      },
      {
        "name": "U.S. Treasury Inflation-Indexed Notes",
        "value": "30327721.03",
        "weight": "0.01614897",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 2-1/2% 01/15/29",
        "value": "30071659.70",
        "weight": "0.01601262",
        "shared": true
      },
      {
        "name": "U.S. TREASURY INFLATION-PROTECTED SECURITIES 3-3/8% 04/15/32",
        "value": "18873770.38",
        "weight": "0.01004994",
        "shared": true
      },
      {
        "name": "State Street Navigator Securities Lending Portfolio II",
        "value": "8891250.80",
        "weight": "0.00473443",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-003383",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/35315/000003540226003383/0000035402-26-003383-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-055574",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1064642/000141036826055574/0001410368-26-055574-index.htm"
    }
  ]
}