{
  "page": "compare",
  "query": {
    "a": "FBTIX",
    "b": "BIB"
  },
  "retrieved_at": "2026-07-07T18:20:24+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": "Fidelity Advisor Biotechnology Fund",
    "ticker": "FBTIX",
    "slug": "FBTIX",
    "series_id": "S000005321",
    "html_url": "https://fundwatcher.app/funds/FBTIX/"
  },
  "fund_b": {
    "name": "ProShares Ultra Nasdaq Biotechnology",
    "ticker": "BIB",
    "slug": "BIB",
    "series_id": "S000018718",
    "html_url": "https://fundwatcher.app/funds/BIB/"
  },
  "overlap": {
    "coverage_a_by_b": "0.2593112045580742686613760381",
    "coverage_b_by_a": "0.2593112045580742686613760379",
    "shared_count": 50,
    "as_of": {
      "a": "2026-01-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "ABBVIE INC",
        "value": "309890235.80",
        "weight": "0.16044894",
        "shared": false
      },
      {
        "name": "GILEAD SCIENCES INC",
        "value": "122658995.00",
        "weight": "0.06350799",
        "shared": true
      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
        "value": "93705499.16",
        "weight": "0.04851701",
        "shared": true
      },
      {
        "name": "Ascendis Pharma A/S",
        "value": "83798312.50",
        "weight": "0.04338746",
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      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "71404090.38",
        "weight": "0.03697022",
        "shared": true
      },
      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "68080500.00",
        "weight": "0.03524940",
        "shared": true
      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "66944838.29",
        "weight": "0.03466140",
        "shared": false
      },
      {
        "name": "INSMED INC",
        "value": "64677501.00",
        "weight": "0.03348746",
        "shared": true
      },
      {
        "name": "VIRIDIAN THERAPEUTICS INC",
        "value": "58821312.00",
        "weight": "0.03045535",
        "shared": false
      },
      {
        "name": "BIOGEN INC",
        "value": "52905649.00",
        "weight": "0.02739246",
        "shared": true
      },
      {
        "name": "AMGEN INC",
        "value": "51522341.64",
        "weight": "0.02667624",
        "shared": true
      },
      {
        "name": "VAXCYTE INC",
        "value": "42659344.53",
        "weight": "0.02208733",
        "shared": true
      },
      {
        "name": "STRUCTURE THERAPEUTICS INC ADR",
        "value": "42562140.00",
        "weight": "0.02203700",
        "shared": true
      },
      {
        "name": "NUVALENT INC-A",
        "value": "42417842.96",
        "weight": "0.02196229",
        "shared": true
      },
      {
        "name": "DIANTHUS THERAPEUTICS INC",
        "value": "38978010.18",
        "weight": "0.02018128",
        "shared": false
      },
      {
        "name": "AMYLYX PHARMACEUTICALS INC",
        "value": "34770428.00",
        "weight": "0.01800276",
        "shared": true
      },
      {
        "name": "MODERNA INC",
        "value": "29716401.00",
        "weight": "0.01538598",
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      },
      {
        "name": "APOGEE THERAPEUTICS INC",
        "value": "29652380.89",
        "weight": "0.01535283",
        "shared": true
      },
      {
        "name": "XENON PHARMACEUTICALS INC",
        "value": "29148185.58",
        "weight": "0.01509178",
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      },
      {
        "name": "CRINETICS PHARMACEUTICALS INC",
        "value": "27190831.80",
        "weight": "0.01407834",
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      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "27129600.00",
        "weight": "0.01404664",
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      },
      {
        "name": "SCHOLAR ROCK HOLDING CORP",
        "value": "25822197.12",
        "weight": "0.01336971",
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      },
      {
        "name": "ORUKA THERAPEUTICS INC",
        "value": "24330204.78",
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      },
      {
        "name": "SPYRE THERAPEUTICS INC",
        "value": "23963957.16",
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      },
      {
        "name": "UCB SA",
        "value": "22947570.03",
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      },
      {
        "name": "UNIQURE N.V.",
        "value": "22529152.00",
        "weight": "0.01166471",
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      },
      {
        "name": "UPSTREAM BIO INC",
        "value": "21476373.24",
        "weight": "0.01111962",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "21105444.00",
        "weight": "0.01092757",
        "shared": true
      },
      {
        "name": "NATERA INC",
        "value": "20663916.00",
        "weight": "0.01069896",
        "shared": false
      },
      {
        "name": "OLEMA PHARMACEUTICALS INC",
        "value": "20133616.00",
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      },
      {
        "name": "VIKING THERAPEUTICS INC",
        "value": "18800118.48",
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      },
      {
        "name": "NEWAMSTERDAM PHARMA COMPANY NV",
        "value": "18248768.00",
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      },
      {
        "name": "CYTOKINETICS INC",
        "value": "17887256.49",
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      },
      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "16842273.00",
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        "shared": true
      },
      {
        "name": "JADE BIOSCIENCES INC",
        "value": "13960694.23",
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        "shared": false
      },
      {
        "name": "CG ONCOLOGY INC",
        "value": "12955245.00",
        "weight": "0.00670771",
        "shared": true
      },
      {
        "name": "RHYTHM PHARMACEUTICALS INC",
        "value": "12938024.00",
        "weight": "0.00669880",
        "shared": true
      },
      {
        "name": "ENLIVEN THERAPEUTICS INC",
        "value": "12544229.90",
        "weight": "0.00649491",
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      },
      {
        "name": "ZENAS BIOPHARMA INC",
        "value": "11560534.92",
        "weight": "0.00598559",
        "shared": true
      },
      {
        "name": "DISC MEDICINE INC",
        "value": "11004337.04",
        "weight": "0.00569761",
        "shared": true
      },
      {
        "name": "ARCELLX INC",
        "value": "9761499.00",
        "weight": "0.00505412",
        "shared": true
      },
      {
        "name": "STOKE THERAPEUTICS INC",
        "value": "9639018.00",
        "weight": "0.00499070",
        "shared": true
      },
      {
        "name": "SONOMA BIOTHERAPEUTICS INC SER B PFD PP",
        "value": "9439952.72",
        "weight": "0.00488764",
        "shared": false
      },
      {
        "name": "TRAVERE THERAPEUTICS INC",
        "value": "9364308.00",
        "weight": "0.00484847",
        "shared": true
      },
      {
        "name": "MINERALYS THERAPEUTICS INC",
        "value": "8241452.00",
        "weight": "0.00426710",
        "shared": true
      },
      {
        "name": "CYTOMX THERAPEUTICS INC",
        "value": "7682928.19",
        "weight": "0.00397792",
        "shared": true
      },
      {
        "name": "ANAPTYSBIO INC",
        "value": "7035644.00",
        "weight": "0.00364278",
        "shared": true
      },
      {
        "name": "SOLENO THERAPEUTICS INC",
        "value": "6979360.00",
        "weight": "0.00361364",
        "shared": false
      },
      {
        "name": "CELLDEX THERAPEUTICS INC",
        "value": "6781039.20",
        "weight": "0.00351095",
        "shared": false
      },
      {
        "name": "REZOLUTE INC",
        "value": "6630234.00",
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      }
    ],
    "b_top": [
      {
        "name": "US ULTRA BOND CBT Sep25",
        "value": "16805976.23",
        "weight": "0.19641231",
        "shared": false
      },
      {
        "name": "GILEAD SCIENCES INC",
        "value": "5943700.80",
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      },
      {
        "name": "VERTEX PHARMACEUTICALS INC",
        "value": "5753788.23",
        "weight": "0.06724482",
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      },
      {
        "name": "AMGEN INC",
        "value": "5642293.76",
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      },
      {
        "name": "Repurchase Agreement",
        "value": "5219635.99",
        "weight": "0.06100215",
        "shared": false
      },
      {
        "name": "REGENERON PHARMACEUTICALS INC",
        "value": "3727784.23",
        "weight": "0.04356681",
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      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
        "value": "2031144.92",
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      },
      {
        "name": "Invesco Government & Agency Portfolio, Institutional Class",
        "value": "1662868.50",
        "weight": "0.01943403",
        "shared": false
      },
      {
        "name": "INSMED INC",
        "value": "1470601.84",
        "weight": "0.01718700",
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      },
      {
        "name": "BIOGEN INC",
        "value": "1299388.68",
        "weight": "0.01518602",
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      },
      {
        "name": "ARGENX SE SPONSORED ADR",
        "value": "1030740.48",
        "weight": "0.01204632",
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      },
      {
        "name": "UNITED THERAPEUTICS CORP DEL",
        "value": "1001753.20",
        "weight": "0.01170754",
        "shared": false
      },
      {
        "name": "MODERNA INC",
        "value": "966349.23",
        "weight": "0.01129377",
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      },
      {
        "name": "ILLUMINA INC",
        "value": "948615.30",
        "weight": "0.01108652",
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      },
      {
        "name": "ROIVANT SCIENCES LTD",
        "value": "929379.16",
        "weight": "0.01086170",
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      },
      {
        "name": "INCYTE CORP",
        "value": "918012.55",
        "weight": "0.01072886",
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      },
      {
        "name": "ROYALTY PHARMA PLC",
        "value": "911677.09",
        "weight": "0.01065482",
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      },
      {
        "name": "REVOLUTION MEDICINES INC",
        "value": "910732.54",
        "weight": "0.01064378",
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      },
      {
        "name": "VIATRIS INC",
        "value": "794022.19",
        "weight": "0.00927978",
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      },
      {
        "name": "Ascendis Pharma A/S",
        "value": "661972.50",
        "weight": "0.00773651",
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      },
      {
        "name": "NEUROCRINE BIOSCIENCES INC",
        "value": "608879.00",
        "weight": "0.00711600",
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      },
      {
        "name": "IONIS PHARMACEUTICALS INC",
        "value": "606920.85",
        "weight": "0.00709312",
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      },
      {
        "name": "SANOFI SPON ADR",
        "value": "594576.54",
        "weight": "0.00694885",
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      },
      {
        "name": "BRIDGEBIO PHARMA INC",
        "value": "591472.56",
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      },
      {
        "name": "MEDPACE HOLDINGS INC",
        "value": "587739.76",
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      },
      {
        "name": "SUMMIT THERAPEUTICS INC",
        "value": "570281.25",
        "weight": "0.00666491",
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      },
      {
        "name": "GUARDANT HEALTH INC",
        "value": "560958.60",
        "weight": "0.00655595",
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      },
      {
        "name": "BIOMARIN PHARMACEUTICAL INC",
        "value": "547606.83",
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      },
      {
        "name": "EXELIXIS INC",
        "value": "545506.86",
        "weight": "0.00637537",
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      },
      {
        "name": "JAZZ PHARMA PLC",
        "value": "533196.12",
        "weight": "0.00623149",
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      },
      {
        "name": "BIONTECH SE ADR",
        "value": "514663.87",
        "weight": "0.00601490",
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      },
      {
        "name": "BEONE MEDICINES LTD ADR",
        "value": "460903.46",
        "weight": "0.00538660",
        "shared": false
      },
      {
        "name": "MADRIGAL PHARMACEUTICALS INC",
        "value": "452736.00",
        "weight": "0.00529115",
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      },
      {
        "name": "IMMUNITYBIO INC",
        "value": "444804.18",
        "weight": "0.00519845",
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      },
      {
        "name": "TEMPUS AI INC-A",
        "value": "425041.50",
        "weight": "0.00496748",
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      },
      {
        "name": "ARROWHEAD PHARMACEUTICALS INC",
        "value": "396766.17",
        "weight": "0.00463703",
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      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "388946.25",
        "weight": "0.00454563",
        "shared": true
      },
      {
        "name": "AXSOME THERAPEUTICS INC",
        "value": "381372.03",
        "weight": "0.00445711",
        "shared": false
      },
      {
        "name": "HALOZYME THERAPEUTICS INC",
        "value": "377547.90",
        "weight": "0.00441242",
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      },
      {
        "name": "VAXCYTE INC",
        "value": "373156.56",
        "weight": "0.00436110",
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      },
      {
        "name": "KRYSTAL BIOTECH INC",
        "value": "369081.96",
        "weight": "0.00431348",
        "shared": false
      },
      {
        "name": "CYTOKINETICS INC",
        "value": "351294.12",
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      },
      {
        "name": "NUVALENT INC-A",
        "value": "340003.25",
        "weight": "0.00397364",
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      },
      {
        "name": "Abivax SA SPONSORED ADS",
        "value": "330609.28",
        "weight": "0.00386385",
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      },
      {
        "name": "ARCELLX INC",
        "value": "303819.30",
        "weight": "0.00355075",
        "shared": true
      },
      {
        "name": "KYMERA THERAPEUTICS INC",
        "value": "303464.70",
        "weight": "0.00354661",
        "shared": true
      },
      {
        "name": "RHYTHM PHARMACEUTICALS INC",
        "value": "285793.86",
        "weight": "0.00334009",
        "shared": true
      },
      {
        "name": "COGENT BIOSCIENCES INC",
        "value": "275368.80",
        "weight": "0.00321825",
        "shared": true
      },
      {
        "name": "PROTAGONIST THERAPEUTICS INC",
        "value": "265834.96",
        "weight": "0.00310683",
        "shared": false
      },
      {
        "name": "CRISPR THERAPEUTICS AG",
        "value": "264616.00",
        "weight": "0.00309258",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000035402-26-001936",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/315700/000003540226001936/0000035402-26-001936-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002071691-26-009265",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1174610/000207169126009265/0002071691-26-009265-index.htm"
    }
  ]
}