{
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    {
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      "url": "https://datashop.cboe.com/option-eod-summary",
      "accessed": "2026-10-22",
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    },
    {
      "id": "S4",
      "title": "Cboe Option Quotes product documentation",
      "url": "https://datashop.cboe.com/option-quote-intervals",
      "accessed": "2026-10-22",
      "role": "Interval NBBO and interval OHLC/volume; not daily totals"
    },
    {
      "id": "S5",
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      "url": "https://datashop.cboe.com/documents/Option_EOD_Summary_Layout.pdf",
      "role": "Reference field definitions"
    },
    {
      "id": "S6",
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      "location": "S1 ZIP / OptionEOD_Sample_ReadMe.txt",
      "role": "Demonstration subset and variant limitations"
    },
    {
      "id": "S7",
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      "url": "https://datashop.cboe.com/documents/Option_Quotes_Layout.pdf",
      "accessed": "2026-10-22",
      "role": "Eastern interval timestamps; interval trades; start-of-day OCC open interest"
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  ],
  "hdn_files": [
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      "access": "Licensed HistoricalData.net daily CSV; not included in this package"
    },
    {
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      "access": "Licensed HistoricalData.net daily CSV; not included in this package"
    }
  ],
  "verification": "Full published daily files read to EOF; byte count, row count and SHA-256 checked before extracts were accepted. Only selected rows were compared."
}