{
  "page": "compare",
  "query": {
    "a": "BGSIX",
    "b": "MTCAX"
  },
  "retrieved_at": "2026-07-07T17:02:42+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": "BlackRock Technology Opportunities Fund",
    "ticker": "BGSIX",
    "slug": "BGSIX",
    "series_id": "S000001510",
    "html_url": "https://fundwatcher.app/funds/BGSIX/"
  },
  "fund_b": {
    "name": "MFS Technology Fund",
    "ticker": "MTCAX",
    "slug": "MTCAX",
    "series_id": "S000000768",
    "html_url": "https://fundwatcher.app/funds/MTCAX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.4925681536403251239408055768",
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    "as_of": {
      "a": "2026-02-27",
      "b": "2026-02-28"
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      {
        "name": "TAIWAN SEMIC MFG CO LTD SP ADR",
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        "name": "SK HYNIX INC",
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      {
        "name": "LAM RESEARCH CORP",
        "value": "281662032.50",
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        "name": "MONGODB INC CL A",
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        "name": "ASE TECHNOLOGY H",
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      {
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      {
        "name": "LAM RESEARCH CORP",
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      {
        "name": "TSMC",
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      {
        "name": "KLA CORP",
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        "name": "INTL BUS MACH CORP",
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      {
        "name": "MONGODB INC CL A",
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      {
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      {
        "name": "DATADOG INC CL A",
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      {
        "name": "INTEL CORP",
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      {
        "name": "MFS Institutional Money Market Portfolio, Class A",
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      {
        "name": "FIGMA INC-CL A",
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      {
        "name": "NEW TAIWAN DOLLAR",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0000940400-26-014713",
      "as_of": "2026-02-27",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/844779/000094040026014713/0000940400-26-014713-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0001410368-26-040067",
      "as_of": "2026-02-28",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/798244/000141036826040067/0001410368-26-040067-index.htm"
    }
  ]
}