{
  "page": "compare",
  "query": {
    "a": "IYZ",
    "b": "FSTCX"
  },
  "retrieved_at": "2026-07-07T16:49:32+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": "iShares U.S. Telecommunications ETF",
    "ticker": "IYZ",
    "slug": "IYZ",
    "series_id": "S000004333",
    "html_url": "https://fundwatcher.app/funds/IYZ/"
  },
  "fund_b": {
    "name": "Select Telecommunications Portfolio",
    "ticker": "FSTCX",
    "slug": "FSTCX",
    "series_id": "S000007485",
    "html_url": "https://fundwatcher.app/funds/FSTCX/"
  },
  "overlap": {
    "coverage_a_by_b": "0.4032599057976210618113212242",
    "coverage_b_by_a": "0.4032599057976210618113212242",
    "shared_count": 8,
    "as_of": {
      "a": "2026-03-31",
      "b": "2026-02-28"
    },
    "a_top": [
      {
        "name": "CISCO SYSTEMS INC",
        "value": "152662437.27",
        "weight": "0.18333045",
        "shared": false
      },
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "107297881.60",
        "weight": "0.12885271",
        "shared": true
      },
      {
        "name": "AT&T INC",
        "value": "102456110.12",
        "weight": "0.12303829",
        "shared": true
      },
      {
        "name": "BlackRock Cash Funds: Institutional, SL Agency Shares",
        "value": "34419148.03",
        "weight": "0.04133353",
        "shared": false
      },
      {
        "name": "CIENA CORP",
        "value": "33884714.40",
        "weight": "0.04069174",
        "shared": false
      },
      {
        "name": "T-MOBILE US INC",
        "value": "32691589.56",
        "weight": "0.03925893",
        "shared": true
      },
      {
        "name": "ARISTA NETWORKS INC",
        "value": "31797073.28",
        "weight": "0.03818472",
        "shared": false
      },
      {
        "name": "COMCAST CORP CL A",
        "value": "31667790.33",
        "weight": "0.03802946",
        "shared": true
      },
      {
        "name": "LUMENTUM HOLDINGS INC",
        "value": "30993121.52",
        "weight": "0.03721926",
        "shared": false
      },
      {
        "name": "IRIDIUM COMMUNICATIONS INC",
        "value": "29880557.10",
        "weight": "0.03588320",
        "shared": true
      },
      {
        "name": "MOTOROLA SOLUTIONS INC",
        "value": "29604999.43",
        "weight": "0.03555228",
        "shared": false
      },
      {
        "name": "MILLICOM INTL CELLULAR S.A. COMMON STOCK USD1.5",
        "value": "28477125.06",
        "weight": "0.03419783",
        "shared": false
      },
      {
        "name": "UBIQUITI INC",
        "value": "27626957.82",
        "weight": "0.03317688",
        "shared": false
      },
      {
        "name": "CHARTER COMMUNICATIONS INC A",
        "value": "26707162.44",
        "weight": "0.03207230",
        "shared": false
      },
      {
        "name": "AST SPACEMOBILE INC",
        "value": "26116149.02",
        "weight": "0.03136256",
        "shared": true
      },
      {
        "name": "ROKU INC CLASS A",
        "value": "25741560.24",
        "weight": "0.03091272",
        "shared": false
      },
      {
        "name": "GCI LIBERTY INC. - CL C",
        "value": "24210537.66",
        "weight": "0.02907414",
        "shared": true
      },
      {
        "name": "LIBERTY BROADBAND CORP C",
        "value": "22717492.00",
        "weight": "0.02728116",
        "shared": false
      },
      {
        "name": "LIBERTY GLOBAL LTD COMMON STOCK USD.01",
        "value": "15111955.95",
        "weight": "0.01814776",
        "shared": false
      },
      {
        "name": "Liberty Global Ltd - C Shares",
        "value": "11429477.40",
        "weight": "0.01372552",
        "shared": false
      },
      {
        "name": "LIBERTY BROADBAND CORP A",
        "value": "3302969.40",
        "weight": "0.00396650",
        "shared": false
      },
      {
        "name": "GCI LIBERTY INC. A",
        "value": "2459332.15",
        "weight": "0.00295338",
        "shared": true
      },
      {
        "name": "BlackRock Cash Funds: Treasury, SL Agency Shares",
        "value": "1457932.47",
        "weight": "0.00175081",
        "shared": false
      },
      {
        "name": "E MINI RUSS 1000 VJUN26",
        "value": "3206.13",
        "weight": "0.00000385",
        "shared": false
      }
    ],
    "b_top": [
      {
        "name": "VERIZON COMMUNICATIONS INC",
        "value": "56131579.58",
        "weight": "0.22402089",
        "shared": true
      },
      {
        "name": "AT&T INC",
        "value": "53639710.20",
        "weight": "0.21407585",
        "shared": true
      },
      {
        "name": "Fidelity Securities Lending Cash Central Fund",
        "value": "18695076.91",
        "weight": "0.07461197",
        "shared": false
      },
      {
        "name": "T-MOBILE US INC",
        "value": "15027838.16",
        "weight": "0.05997604",
        "shared": true
      },
      {
        "name": "AST SPACEMOBILE INC",
        "value": "11783472.00",
        "weight": "0.04702779",
        "shared": true
      },
      {
        "name": "GLOBALSTAR INC",
        "value": "10230836.46",
        "weight": "0.04083122",
        "shared": false
      },
      {
        "name": "Fidelity Cash Central Fund",
        "value": "10085766.86",
        "weight": "0.04025225",
        "shared": false
      },
      {
        "name": "IRIDIUM COMMUNICATIONS INC",
        "value": "9522783.45",
        "weight": "0.03800539",
        "shared": true
      },
      {
        "name": "LUMEN TECHNOLOGIES INC",
        "value": "9017613.00",
        "weight": "0.03598925",
        "shared": false
      },
      {
        "name": "LIBERTY LATIN AMERICA LTD CL C",
        "value": "7272508.02",
        "weight": "0.02902455",
        "shared": false
      },
      {
        "name": "UNITI GROUP INC",
        "value": "6295200.00",
        "weight": "0.02512412",
        "shared": false
      },
      {
        "name": "IDT CORP CL B NEW",
        "value": "6007005.00",
        "weight": "0.02397393",
        "shared": false
      },
      {
        "name": "COMCAST CORP CL A",
        "value": "5659488.00",
        "weight": "0.02258699",
        "shared": true
      },
      {
        "name": "GCI LIBERTY INC. - CL C",
        "value": "5069224.40",
        "weight": "0.02023125",
        "shared": true
      },
      {
        "name": "TELEPHONE & DATA",
        "value": "4934314.00",
        "weight": "0.01969283",
        "shared": false
      },
      {
        "name": "US CELLULAR CORP",
        "value": "4780413.00",
        "weight": "0.01907861",
        "shared": false
      },
      {
        "name": "LIBERTY GLOBAL LTD CL A",
        "value": "3107286.00",
        "weight": "0.01240116",
        "shared": false
      },
      {
        "name": "LIBERTY GLOBAL LTD C",
        "value": "3072982.80",
        "weight": "0.01226426",
        "shared": false
      },
      {
        "name": "COGENT COMMUNICATIONS HOLDINGS INC",
        "value": "2871011.64",
        "weight": "0.01145819",
        "shared": false
      },
      {
        "name": "LIBERTY LATIN AMERICA LTD CL A",
        "value": "2232832.00",
        "weight": "0.00891122",
        "shared": false
      },
      {
        "name": "ECHOSTAR CORP CL A",
        "value": "2229729.00",
        "weight": "0.00889884",
        "shared": false
      },
      {
        "name": "ANTERIX INC",
        "value": "1295541.00",
        "weight": "0.00517050",
        "shared": false
      },
      {
        "name": "BANDWIDTH INC-A",
        "value": "615030.00",
        "weight": "0.00245458",
        "shared": false
      },
      {
        "name": "GCI LIBERTY INC. A",
        "value": "512646.00",
        "weight": "0.00204597",
        "shared": true
      },
      {
        "name": "SHENANDOAH TELECOM CO",
        "value": "336974.49",
        "weight": "0.00134486",
        "shared": false
      },
      {
        "name": "SPOK HOLDINGS INC",
        "value": "137182.00",
        "weight": "0.00054749",
        "shared": false
      }
    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001004726-26-003758",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1100663/000100472626003758/0001004726-26-003758-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000035402-26-002675",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/320351/000003540226002675/0000035402-26-002675-index.htm"
    }
  ]
}