{
  "page": "compare",
  "query": {
    "a": "VB",
    "b": "SMXAX"
  },
  "retrieved_at": "2026-07-07T15:01:40+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": "VANGUARD SMALL-CAP INDEX FUND",
    "ticker": "VB",
    "slug": "VB",
    "series_id": "S000002845",
    "html_url": "https://fundwatcher.app/funds/VB/"
  },
  "fund_b": {
    "name": "SIIT EXTENDED MARKET INDEX FUND",
    "ticker": "SMXAX",
    "slug": "SMXAX",
    "series_id": "S000035814",
    "html_url": "https://fundwatcher.app/funds/SMXAX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.6447634322351882975211436408",
    "coverage_b_by_a": "0.6447634322351882975211436410",
    "shared_count": 1064,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "Vanguard Market Liquidity Fund",
        "value": "2351655312.95",
        "weight": "0.01412621",
        "shared": false
      },
      {
        "name": "EMCOR GROUP INC",
        "value": "758128455.33",
        "weight": "0.00455402",
        "shared": false
      },
      {
        "name": "NRG ENERGY INC",
        "value": "715635158.10",
        "weight": "0.00429876",
        "shared": false
      },
      {
        "name": "ATMOS ENERGY CORP",
        "value": "704658957.52",
        "weight": "0.00423283",
        "shared": false
      },
      {
        "name": "TAPESTRY INC",
        "value": "658763991.73",
        "weight": "0.00395714",
        "shared": false
      },
      {
        "name": "TECHNIPFMC PLC",
        "value": "637707451.41",
        "weight": "0.00383066",
        "shared": true
      },
      {
        "name": "CIENA CORP",
        "value": "633182165.58",
        "weight": "0.00380348",
        "shared": false
      },
      {
        "name": "CASEY'S GENERAL",
        "value": "622090296.24",
        "weight": "0.00373685",
        "shared": true
      },
      {
        "name": "JABIL INC",
        "value": "614424502.92",
        "weight": "0.00369080",
        "shared": false
      },
      {
        "name": "NATERA INC",
        "value": "610894253.76",
        "weight": "0.00366959",
        "shared": true
      },
      {
        "name": "EXPAND ENERGY CORP",
        "value": "608516468.12",
        "weight": "0.00365531",
        "shared": false
      },
      {
        "name": "UNITED THERAPEUTICS CORP DEL",
        "value": "599248391.58",
        "weight": "0.00359964",
        "shared": true
      },
      {
        "name": "FTAI AVIATION LT",
        "value": "579458810.00",
        "weight": "0.00348076",
        "shared": true
      },
      {
        "name": "CURTISS WRIGHT CORPORATION",
        "value": "579031009.92",
        "weight": "0.00347819",
        "shared": true
      },
      {
        "name": "LUMENTUM HOLDINGS INC",
        "value": "578495868.52",
        "weight": "0.00347498",
        "shared": true
      },
      {
        "name": "COMFORT SYSTEMS USA INC",
        "value": "559221814.70",
        "weight": "0.00335920",
        "shared": false
      },
      {
        "name": "FLEX LTD",
        "value": "554959210.02",
        "weight": "0.00333360",
        "shared": true
      },
      {
        "name": "OMNICOM GROUP INC",
        "value": "538891850.88",
        "weight": "0.00323708",
        "shared": false
      },
      {
        "name": "COHERENT CORP",
        "value": "514884483.33",
        "weight": "0.00309287",
        "shared": true
      },
      {
        "name": "WILLIAMS-SONOMA INC",
        "value": "501897238.38",
        "weight": "0.00301486",
        "shared": false
      },
      {
        "name": "XPO LOGISTICS INC",
        "value": "499247984.40",
        "weight": "0.00299894",
        "shared": true
      },
      {
        "name": "ROYAL GOLD INC",
        "value": "497650868.67",
        "weight": "0.00298935",
        "shared": true
      },
      {
        "name": "AST SPACEMOBILE INC",
        "value": "496052278.83",
        "weight": "0.00297975",
        "shared": true
      },
      {
        "name": "WOODWARD INC",
        "value": "492002916.64",
        "weight": "0.00295542",
        "shared": true
      },
      {
        "name": "ALBEMARLE CORP",
        "value": "487842075.37",
        "weight": "0.00293043",
        "shared": false
      },
      {
        "name": "SMURFIT WESTROCK",
        "value": "479936065.25",
        "weight": "0.00288294",
        "shared": false
      },
      {
        "name": "US FOODS HOLDING CORP",
        "value": "468911271.34",
        "weight": "0.00281671",
        "shared": true
      },
      {
        "name": "MASTEC INC",
        "value": "468248813.36",
        "weight": "0.00281273",
        "shared": true
      },
      {
        "name": "SOFI TECHNOLOGIES INC A",
        "value": "466942284.88",
        "weight": "0.00280489",
        "shared": true
      },
      {
        "name": "CF INDUSTRIES HOLDINGS INC",
        "value": "460070122.08",
        "weight": "0.00276360",
        "shared": false
      },
      {
        "name": "ATI INC",
        "value": "459282386.08",
        "weight": "0.00275887",
        "shared": true
      },
      {
        "name": "EQT CORPORATION",
        "value": "458018607.36",
        "weight": "0.00275128",
        "shared": false
      },
      {
        "name": "CH ROBINSON WORLDWIDE INC",
        "value": "454239646.10",
        "weight": "0.00272858",
        "shared": false
      },
      {
        "name": "BUNGE GLOBAL SA",
        "value": "454055155.20",
        "weight": "0.00272747",
        "shared": false
      },
      {
        "name": "NVENT ELECTRIC",
        "value": "441079840.48",
        "weight": "0.00264953",
        "shared": true
      },
      {
        "name": "TWILIO INC CLASS A",
        "value": "439571168.82",
        "weight": "0.00264047",
        "shared": true
      },
      {
        "name": "LIBERTY MEDIA CORP LIBERTY FORMULA ONE CL C",
        "value": "438515560.86",
        "weight": "0.00263413",
        "shared": true
      },
      {
        "name": "DUPONT DE NEMOURS INC",
        "value": "431866474.20",
        "weight": "0.00259419",
        "shared": false
      },
      {
        "name": "BWX TECHNOLOGIES INC",
        "value": "431167573.98",
        "weight": "0.00258999",
        "shared": true
      },
      {
        "name": "FABRINET",
        "value": "430815155.52",
        "weight": "0.00258787",
        "shared": true
      },
      {
        "name": "CARPENTER TECHNOLOGY CORP",
        "value": "430046028.80",
        "weight": "0.00258325",
        "shared": true
      },
      {
        "name": "PURE STORAGE INC CL A",
        "value": "426997117.44",
        "weight": "0.00256494",
        "shared": true
      },
      {
        "name": "REVOLUTION MEDICINES INC",
        "value": "422166042.75",
        "weight": "0.00253592",
        "shared": true
      },
      {
        "name": "ROCKET LAB CORP",
        "value": "420128845.50",
        "weight": "0.00252368",
        "shared": true
      },
      {
        "name": "MODERNA INC",
        "value": "416347808.40",
        "weight": "0.00250097",
        "shared": false
      },
      {
        "name": "BLOOM ENERGY CORP CL A",
        "value": "416319852.02",
        "weight": "0.00250080",
        "shared": false
      },
      {
        "name": "ILLUMINA INC",
        "value": "412834964.52",
        "weight": "0.00247987",
        "shared": true
      },
      {
        "name": "ENTEGRIS INC",
        "value": "410895014.16",
        "weight": "0.00246821",
        "shared": true
      },
      {
        "name": "RB GLOBAL INC",
        "value": "410868597.15",
        "weight": "0.00246806",
        "shared": true
      },
      {
        "name": "INSMED INC",
        "value": "406357338.24",
        "weight": "0.00244096",
        "shared": true
      }
    ],
    "b_top": [
      {
        "name": "SEI DAILY INCOME TRUST GOVERNMENT FUND (#36)",
        "value": "21845263.70",
        "weight": "0.01733567",
        "shared": false
      },
      {
        "name": "US ULTRA BOND CBT Sep25",
        "value": "17794744.40",
        "weight": "0.01412131",
        "shared": true
      },
      {
        "name": "VERTIV HOLDINGS CO",
        "value": "14987532.00",
        "weight": "0.01189360",
        "shared": false
      },
      {
        "name": "Spotify Technology SA",
        "value": "12236519.22",
        "weight": "0.00971049",
        "shared": false
      },
      {
        "name": "MARVELL TECHNOLOGY INC",
        "value": "10914764.28",
        "weight": "0.00866159",
        "shared": false
      },
      {
        "name": "Anglogold Ashanti Plc",
        "value": "9927729.00",
        "weight": "0.00787831",
        "shared": false
      },
      {
        "name": "SNOWFLAKE INC CL A",
        "value": "8538387.00",
        "weight": "0.00677578",
        "shared": false
      },
      {
        "name": "CLOUDFLARE INC-A",
        "value": "8333996.00",
        "weight": "0.00661358",
        "shared": false
      },
      {
        "name": "CHENIERE ENERGY INC",
        "value": "7770839.45",
        "weight": "0.00616668",
        "shared": false
      },
      {
        "name": "NU Holdings Ltd/Cayman Islands",
        "value": "7734174.00",
        "weight": "0.00613758",
        "shared": false
      },
      {
        "name": "FERGUSON ENTERPRISES INC",
        "value": "7692420.00",
        "weight": "0.00610445",
        "shared": false
      },
      {
        "name": "LUMENTUM HOLDINGS INC",
        "value": "7618891.70",
        "weight": "0.00604610",
        "shared": true
      },
      {
        "name": "ROBLOX CORP - A",
        "value": "6570762.00",
        "weight": "0.00521434",
        "shared": false
      },
      {
        "name": "ALNYLAM PHARMACEUTICALS INC",
        "value": "6508253.08",
        "weight": "0.00516473",
        "shared": false
      },
      {
        "name": "COHERENT CORP",
        "value": "6188685.93",
        "weight": "0.00491113",
        "shared": true
      },
      {
        "name": "STRATEGY INC CL A",
        "value": "5357415.00",
        "weight": "0.00425147",
        "shared": false
      },
      {
        "name": "BLOOM ENERGY CORP- A COMMON STOCK",
        "value": "5199378.00",
        "weight": "0.00412605",
        "shared": false
      },
      {
        "name": "INSMED INC",
        "value": "4808426.00",
        "weight": "0.00381581",
        "shared": true
      },
      {
        "name": "FTAI AVIATION LT",
        "value": "4801060.00",
        "weight": "0.00380996",
        "shared": true
      },
      {
        "name": "ROCKET LAB CORP",
        "value": "4401670.00",
        "weight": "0.00349302",
        "shared": true
      },
      {
        "name": "NATERA INC",
        "value": "4139996.00",
        "weight": "0.00328536",
        "shared": true
      },
      {
        "name": "TECHNIPFMC PLC",
        "value": "4137744.00",
        "weight": "0.00328358",
        "shared": true
      },
      {
        "name": "VEEVA SYSTEMS-A",
        "value": "4137633.33",
        "weight": "0.00328349",
        "shared": false
      },
      {
        "name": "MONGODB INC CL A",
        "value": "3994195.20",
        "weight": "0.00316966",
        "shared": false
      },
      {
        "name": "CURTISS WRIGHT CORPORATION",
        "value": "3990480.34",
        "weight": "0.00316671",
        "shared": true
      },
      {
        "name": "MARKEL GROUP INC",
        "value": "3964635.11",
        "weight": "0.00314620",
        "shared": false
      },
      {
        "name": "CASEY'S GENERAL",
        "value": "3879753.81",
        "weight": "0.00307884",
        "shared": true
      },
      {
        "name": "COUPANG INC A",
        "value": "3838896.00",
        "weight": "0.00304642",
        "shared": false
      },
      {
        "name": "XPO LOGISTICS INC",
        "value": "3765308.30",
        "weight": "0.00298802",
        "shared": true
      },
      {
        "name": "ROYAL GOLD INC",
        "value": "3747974.58",
        "weight": "0.00297427",
        "shared": true
      },
      {
        "name": "LPL FINL HLDGS INC",
        "value": "3677552.34",
        "weight": "0.00291838",
        "shared": false
      },
      {
        "name": "WOODWARD INC",
        "value": "3574435.92",
        "weight": "0.00283655",
        "shared": true
      },
      {
        "name": "FLEX LTD",
        "value": "3560630.00",
        "weight": "0.00282560",
        "shared": true
      },
      {
        "name": "RESTAURANT BRANDS INTERNATIONAL INC",
        "value": "3556816.00",
        "weight": "0.00282257",
        "shared": false
      },
      {
        "name": "ATI INC",
        "value": "3353595.00",
        "weight": "0.00266130",
        "shared": true
      },
      {
        "name": "US FOODS HOLDING CORP",
        "value": "3342706.00",
        "weight": "0.00265266",
        "shared": true
      },
      {
        "name": "SOFI TECHNOLOGIES INC A",
        "value": "3314957.28",
        "weight": "0.00263064",
        "shared": true
      },
      {
        "name": "UNITED THERAPEUTICS CORP DEL",
        "value": "3277365.60",
        "weight": "0.00260081",
        "shared": true
      },
      {
        "name": "TENET HEALTHCARE CORP",
        "value": "3255704.00",
        "weight": "0.00258362",
        "shared": true
      },
      {
        "name": "ILLUMINA INC",
        "value": "3173256.00",
        "weight": "0.00251819",
        "shared": true
      },
      {
        "name": "ENTEGRIS INC",
        "value": "3103303.50",
        "weight": "0.00246268",
        "shared": true
      },
      {
        "name": "PURE STORAGE INC CL A",
        "value": "3056872.00",
        "weight": "0.00242583",
        "shared": true
      },
      {
        "name": "FABRINET",
        "value": "3041887.25",
        "weight": "0.00241394",
        "shared": true
      },
      {
        "name": "ZOOM VIDEO COMMUNICATIONS INC CL A",
        "value": "3025698.74",
        "weight": "0.00240109",
        "shared": false
      },
      {
        "name": "EXACT SCIENCES CORP",
        "value": "3000707.88",
        "weight": "0.00238126",
        "shared": false
      },
      {
        "name": "CARPENTER TECHNOLOGY CORP",
        "value": "2985923.07",
        "weight": "0.00236953",
        "shared": true
      },
      {
        "name": "BURLINGTON STORES INC",
        "value": "2945952.00",
        "weight": "0.00233781",
        "shared": true
      },
      {
        "name": "LIBERTY MEDIA CORP LIBERTY FORMULA ONE CL C",
        "value": "2943885.78",
        "weight": "0.00233617",
        "shared": true
      },
      {
        "name": "BWX TECHNOLOGIES INC",
        "value": "2929859.52",
        "weight": "0.00232504",
        "shared": true
      },
      {
        "name": "NVENT ELECTRIC",
        "value": "2876148.00",
        "weight": "0.00228241",
        "shared": true
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000036405-26-000319",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/36405/000003640526000319/0000036405-26-000319-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0002048251-26-003453",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/939934/000204825126003453/0002048251-26-003453-index.htm"
    }
  ]
}