{
  "capture_method": "Manual transcription of visible browser table; not an original API response",
  "source": "investing_manual_review",
  "url": "https://www.investing.com/etfs/united-states-copper-index-fund-historical-data",
  "observed_at": "2026-11-05T14:51:00+00:00",
  "observed_at_precision": "Approximate minute of browser review; not a market-data timestamp",
  "instrument": "United States Copper Index Fund, LP (CPER)",
  "exchange_displayed": "NYSE",
  "currency": "USD",
  "selected_from": "2014-12-01",
  "selected_to": "2015-02-06",
  "rows": [
    {"session_date":"2014-12-04","outcome":"date_not_listed"},
    {"session_date":"2014-12-05","outcome":"quoted_close_obtained","close":19.56},
    {"session_date":"2015-02-02","outcome":"date_not_listed"},
    {"session_date":"2015-02-03","outcome":"quoted_close_obtained","close":17.34}
  ],
  "limitations": ["Missing displayed row does not prove no trading", "Upstream independence and historical adjustment basis are unverified", "Manual corroboration only; no automated feed or redistribution permission asserted"]
}