{
  "page": "compare",
  "query": {
    "a": "HAOSX",
    "b": "OAIEX"
  },
  "retrieved_at": "2026-07-07T18:26:53+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": "Harbor International Core Fund",
    "ticker": "HAOSX",
    "slug": "HAOSX",
    "series_id": "S000064886",
    "html_url": "https://fundwatcher.app/funds/HAOSX/"
  },
  "fund_b": {
    "name": "Optimum International Fund",
    "ticker": "OAIEX",
    "slug": "OAIEX",
    "series_id": "S000002421",
    "html_url": "https://fundwatcher.app/funds/OAIEX/"
  },
  "overlap": {
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    "coverage_b_by_a": "0.3046971695581491754525623859",
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      "b": "2026-03-31"
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        "name": "CRH PLC",
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      {
        "name": "PETROLEO BRASILEIRO SPONS ADR",
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      },
      {
        "name": "NOVOZYMES A S",
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    ]
  },
  "error": null,
  "sources": [
    {
      "label": "N-PORT (fund A)",
      "accession_no": "0001410368-26-033725",
      "as_of": "2026-01-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/793769/000141036826033725/0001410368-26-033725-index.htm"
    },
    {
      "label": "N-PORT (fund B)",
      "accession_no": "0000940400-26-022037",
      "as_of": "2026-03-31",
      "edgar_url": "https://www.sec.gov/Archives/edgar/data/1227523/000094040026022037/0000940400-26-022037-index.htm"
    }
  ]
}