{
  "page": "compare",
  "query": {
    "a": "RB",
    "b": "FSSNX"
  },
  "retrieved_at": "2026-07-07T18:52:22+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": "ProShares Russell 2000 Dynamic Buffer ETF",
    "ticker": "RB",
    "slug": "RB",
    "series_id": "S000093204",
    "html_url": "https://fundwatcher.app/funds/RB/"
  },
  "fund_b": {
    "name": "Fidelity Small Cap Index Fund",
    "ticker": "FSSNX",
    "slug": "FSSNX",
    "series_id": "S000033638",
    "html_url": "https://fundwatcher.app/funds/FSSNX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.8351634682752532446519647982",
    "coverage_b_by_a": "0.8351634682752532446519647982",
    "shared_count": 1887,
    "as_of": {
      "a": "2026-02-28",
      "b": "2026-01-31"
    },
    "a_top": [
      {
        "name": "Repurchase Agreement",
        "value": "125704.02",
        "weight": "0.11319033",
        "shared": false
      },
      {
        "name": "BLOOM ENERGY CORP CL A",
        "value": "10741.23",
        "weight": "0.00967195",
        "shared": true
      },
      {
        "name": "Invesco Government & Agency Portfolio, Institutional Class",
        "value": "6883.35",
        "weight": "0.00619812",
        "shared": false
      },
      {
        "name": "FABRINET",
        "value": "6547.56",
        "weight": "0.00589576",
        "shared": true
      },
      {
        "name": "COEUR MINING INC",
        "value": "5538.60",
        "weight": "0.00498724",
        "shared": true
      },
      {
        "name": "CREDO TECHNOLOGY GROUP HOLDING LTD",
        "value": "5501.23",
        "weight": "0.00495359",
        "shared": true
      },
      {
        "name": "NEXTRACKER INC CL A",
        "value": "5149.90",
        "weight": "0.00463723",
        "shared": true
      },
      {
        "name": "ECHOSTAR CORP CL A",
        "value": "5083.32",
        "weight": "0.00457728",
        "shared": true
      },
      {
        "name": "HECLA MINING CO",
        "value": "5056.73",
        "weight": "0.00455334",
        "shared": true
      },
      {
        "name": "KRATOS DEFENSE and SEC SOLTN INC",
        "value": "4481.36",
        "weight": "0.00403525",
        "shared": true
      },
      {
        "name": "STERLING INFRASTRUCTURE INC",
        "value": "4281.30",
        "weight": "0.00385510",
        "shared": true
      },
      {
        "name": "IONQ INC",
        "value": "4143.96",
        "weight": "0.00373143",
        "shared": true
      },
      {
        "name": "ADV ENERGY INDS",
        "value": "4026.84",
        "weight": "0.00362597",
        "shared": true
      },
      {
        "name": "MODINE MFG CO",
        "value": "3863.25",
        "weight": "0.00347867",
        "shared": true
      },
      {
        "name": "ENSIGN GROUP INC",
        "value": "3855.06",
        "weight": "0.00347129",
        "shared": true
      },
      {
        "name": "GUARDANT HEALTH INC",
        "value": "3849.90",
        "weight": "0.00346665",
        "shared": true
      },
      {
        "name": "SPX TECHNOLOGIES INC",
        "value": "3631.04",
        "weight": "0.00326957",
        "shared": true
      },
      {
        "name": "RAMBUS INC",
        "value": "3587.76",
        "weight": "0.00323060",
        "shared": true
      },
      {
        "name": "TTM TECHNOLOGIES INC",
        "value": "3439.92",
        "weight": "0.00309748",
        "shared": true
      },
      {
        "name": "DYCOM INDUSTRIES INC",
        "value": "3360.16",
        "weight": "0.00302566",
        "shared": true
      },
      {
        "name": "BRIDGEBIO PHARMA INC",
        "value": "3324.00",
        "weight": "0.00299310",
        "shared": true
      },
      {
        "name": "CHART INDUSTRIES INC",
        "value": "3109.50",
        "weight": "0.00279995",
        "shared": true
      },
      {
        "name": "US ULTRA BOND CBT Sep25",
        "value": "3054.82",
        "weight": "0.00275072",
        "shared": false
      },
      {
        "name": "AEROVIRONMENT INC",
        "value": "3027.00",
        "weight": "0.00272567",
        "shared": true
      },
      {
        "name": "INTERDIGITAL INC",
        "value": "2932.24",
        "weight": "0.00264034",
        "shared": true
      },
      {
        "name": "CARETRUST REIT INC",
        "value": "2884.02",
        "weight": "0.00259692",
        "shared": true
      },
      {
        "name": "AVIDITY BIOSCIENCES",
        "value": "2808.00",
        "weight": "0.00252847",
        "shared": true
      },
      {
        "name": "SITIME CORP",
        "value": "2785.16",
        "weight": "0.00250790",
        "shared": true
      },
      {
        "name": "UMB FINANCIAL CORP",
        "value": "2781.12",
        "weight": "0.00250426",
        "shared": true
      },
      {
        "name": "AMERICAN HEALTHCARE REIT INC",
        "value": "2768.72",
        "weight": "0.00249310",
        "shared": true
      },
      {
        "name": "ARROWHEAD PHARMACEUTICALS INC",
        "value": "2720.61",
        "weight": "0.00244978",
        "shared": true
      },
      {
        "name": "PRIMORIS SVCS CORP",
        "value": "2712.96",
        "weight": "0.00244289",
        "shared": true
      },
      {
        "name": "COMMERCIAL METALS CO",
        "value": "2712.10",
        "weight": "0.00244211",
        "shared": true
      },
      {
        "name": "MOOG INC-CLASS A",
        "value": "2699.44",
        "weight": "0.00243071",
        "shared": true
      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "2694.00",
        "weight": "0.00242582",
        "shared": true
      },
      {
        "name": "FLUOR CORP",
        "value": "2667.81",
        "weight": "0.00240223",
        "shared": true
      },
      {
        "name": "SANMINA CORP",
        "value": "2639.42",
        "weight": "0.00237667",
        "shared": true
      },
      {
        "name": "WATTS WATER TECH INC CL A",
        "value": "2629.92",
        "weight": "0.00236811",
        "shared": true
      },
      {
        "name": "INSTALLED BUILDING PRODUCTS INC",
        "value": "2622.08",
        "weight": "0.00236105",
        "shared": true
      },
      {
        "name": "JOHN BEAN TECHNOLOGIES CORP",
        "value": "2618.00",
        "weight": "0.00235738",
        "shared": true
      },
      {
        "name": "TEREX CORP",
        "value": "2614.02",
        "weight": "0.00235380",
        "shared": true
      },
      {
        "name": "MADRIGAL PHARMACEUTICALS INC",
        "value": "2592.00",
        "weight": "0.00233397",
        "shared": true
      },
      {
        "name": "OLD NATL BANCORP",
        "value": "2587.20",
        "weight": "0.00232965",
        "shared": true
      },
      {
        "name": "VAXCYTE INC",
        "value": "2531.34",
        "weight": "0.00227935",
        "shared": true
      },
      {
        "name": "JACKSON FINANCIAL INC",
        "value": "2518.04",
        "weight": "0.00226737",
        "shared": true
      },
      {
        "name": "FIRSTCASH HOLDINGS INC",
        "value": "2506.27",
        "weight": "0.00225677",
        "shared": true
      },
      {
        "name": "ZURN ELKAY WATER SOLUTIONS CORP",
        "value": "2498.02",
        "weight": "0.00224934",
        "shared": true
      },
      {
        "name": "SEMTECH CORP",
        "value": "2435.94",
        "weight": "0.00219344",
        "shared": true
      },
      {
        "name": "CYTOKINETICS INC",
        "value": "2426.58",
        "weight": "0.00218502",
        "shared": true
      },
      {
        "name": "FORMFACTOR INC",
        "value": "2373.12",
        "weight": "0.00213688",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "2683036022.20",
        "weight": "0.08282391",
        "shared": false
      },
      {
        "name": "BLOOM ENERGY CORP CL A",
        "value": "320563212.02",
        "weight": "0.00989562",
        "shared": true
      },
      {
        "name": "CREDO TECHNOLOGY GROUP HOLDING LTD",
        "value": "186174724.32",
        "weight": "0.00574712",
        "shared": true
      },
      {
        "name": "FABRINET",
        "value": "171303510.56",
        "weight": "0.00528805",
        "shared": true
      },
      {
        "name": "KRATOS DEFENSE and SEC SOLTN INC",
        "value": "166374232.27",
        "weight": "0.00513589",
        "shared": true
      },
      {
        "name": "NEXTRACKER INC CL A",
        "value": "165501445.95",
        "weight": "0.00510894",
        "shared": true
      },
      {
        "name": "ECHOSTAR CORP CL A",
        "value": "148702015.80",
        "weight": "0.00459035",
        "shared": true
      },
      {
        "name": "HECLA MINING CO",
        "value": "138676223.28",
        "weight": "0.00428086",
        "shared": true
      },
      {
        "name": "GUARDANT HEALTH INC",
        "value": "134151980.36",
        "weight": "0.00414120",
        "shared": true
      },
      {
        "name": "IONQ INC",
        "value": "131059557.44",
        "weight": "0.00404574",
        "shared": true
      },
      {
        "name": "COEUR MINING INC",
        "value": "126782452.16",
        "weight": "0.00391371",
        "shared": true
      },
      {
        "name": "RAMBUS INC",
        "value": "118985702.19",
        "weight": "0.00367303",
        "shared": true
      },
      {
        "name": "BRIDGEBIO PHARMA INC",
        "value": "118646925.95",
        "weight": "0.00366257",
        "shared": true
      },
      {
        "name": "Fidelity Cash Central Fund",
        "value": "103833024.52",
        "weight": "0.00320527",
        "shared": false
      },
      {
        "name": "STERLING INFRASTRUCTURE INC",
        "value": "103443148.20",
        "weight": "0.00319324",
        "shared": true
      },
      {
        "name": "AEROVIRONMENT INC",
        "value": "102003487.95",
        "weight": "0.00314879",
        "shared": true
      },
      {
        "name": "DYCOM INDUSTRIES INC",
        "value": "98919131.35",
        "weight": "0.00305358",
        "shared": true
      },
      {
        "name": "TTM TECHNOLOGIES INC",
        "value": "97375218.20",
        "weight": "0.00300592",
        "shared": true
      },
      {
        "name": "SPX TECHNOLOGIES INC",
        "value": "97337056.86",
        "weight": "0.00300474",
        "shared": true
      },
      {
        "name": "MODINE MFG CO",
        "value": "93742649.00",
        "weight": "0.00289379",
        "shared": true
      },
      {
        "name": "ENSIGN GROUP INC",
        "value": "93335146.86",
        "weight": "0.00288121",
        "shared": true
      },
      {
        "name": "ADV ENERGY INDS",
        "value": "93233978.88",
        "weight": "0.00287808",
        "shared": true
      },
      {
        "name": "CHART INDUSTRIES INC",
        "value": "90683881.12",
        "weight": "0.00279936",
        "shared": true
      },
      {
        "name": "UMB FINANCIAL CORP",
        "value": "89446549.92",
        "weight": "0.00276117",
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      },
      {
        "name": "ARROWHEAD PHARMACEUTICALS INC",
        "value": "89053899.69",
        "weight": "0.00274905",
        "shared": true
      },
      {
        "name": "MADRIGAL PHARMACEUTICALS INC",
        "value": "88101733.43",
        "weight": "0.00271965",
        "shared": true
      },
      {
        "name": "OKLO INC",
        "value": "83836038.24",
        "weight": "0.00258797",
        "shared": true
      },
      {
        "name": "MOOG INC-CLASS A",
        "value": "83157492.25",
        "weight": "0.00256703",
        "shared": true
      },
      {
        "name": "OLD NATL BANCORP",
        "value": "82950330.47",
        "weight": "0.00256063",
        "shared": true
      },
      {
        "name": "COMMERCIAL METALS CO",
        "value": "82868550.45",
        "weight": "0.00255811",
        "shared": true
      },
      {
        "name": "INTERDIGITAL INC",
        "value": "81930564.08",
        "weight": "0.00252915",
        "shared": true
      },
      {
        "name": "LUMEN TECHNOLOGIES INC",
        "value": "81496094.40",
        "weight": "0.00251574",
        "shared": true
      },
      {
        "name": "CARETRUST REIT INC",
        "value": "81488351.56",
        "weight": "0.00251550",
        "shared": true
      },
      {
        "name": "AVIDITY BIOSCIENCES",
        "value": "81293204.28",
        "weight": "0.00250948",
        "shared": true
      },
      {
        "name": "JACKSON FINANCIAL INC",
        "value": "79830877.08",
        "weight": "0.00246434",
        "shared": true
      },
      {
        "name": "URANIUM ENERGY CORP",
        "value": "79696037.60",
        "weight": "0.00246017",
        "shared": true
      },
      {
        "name": "WATTS WATER TECH INC CL A",
        "value": "79587426.93",
        "weight": "0.00245682",
        "shared": true
      },
      {
        "name": "JOHN BEAN TECHNOLOGIES CORP",
        "value": "79574162.33",
        "weight": "0.00245641",
        "shared": true
      },
      {
        "name": "APPLIED DIGITAL CORP",
        "value": "78009309.84",
        "weight": "0.00240811",
        "shared": true
      },
      {
        "name": "COMPASS INC - A",
        "value": "77869717.52",
        "weight": "0.00240380",
        "shared": true
      },
      {
        "name": "PRIMORIS SVCS CORP",
        "value": "77690412.50",
        "weight": "0.00239826",
        "shared": true
      },
      {
        "name": "AMERICAN HEALTHCARE REIT INC",
        "value": "76892151.22",
        "weight": "0.00237362",
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      },
      {
        "name": "CADENCE BANK",
        "value": "76216573.40",
        "weight": "0.00235277",
        "shared": false
      },
      {
        "name": "SITIME CORP",
        "value": "75777789.01",
        "weight": "0.00233922",
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      },
      {
        "name": "PRAXIS PRECISION MEDICINES INC",
        "value": "74727290.00",
        "weight": "0.00230679",
        "shared": true
      },
      {
        "name": "ORMAT TECHNOLOGIES INC",
        "value": "73823922.50",
        "weight": "0.00227891",
        "shared": true
      },
      {
        "name": "AXSOME THERAPEUTICS INC",
        "value": "73169728.50",
        "weight": "0.00225871",
        "shared": true
      },
      {
        "name": "FLUOR CORP",
        "value": "72127948.31",
        "weight": "0.00222655",
        "shared": true
      },
      {
        "name": "SANMINA CORP",
        "value": "71731308.88",
        "weight": "0.00221431",
        "shared": true
      },
      {
        "name": "CYTOKINETICS INC",
        "value": "71409692.01",
        "weight": "0.00220438",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0002071691-26-009203",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1174610/000207169126009203/0002071691-26-009203-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002107",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/35315/000003540226002107/0000035402-26-002107-index.htm"
    }
  ]
}