Optsum data is an end of day index option summary for CBOE traded options in ^SPX, ^OEX, and ^VIX with volume traded, open interest, open, high, low and last sales prices for every series in chain. The Optsum data is available from 1990 through 9/30/2019, or based on the index option availability in ^SPX, ^OEX, and ^VIX.
* If you are interested in ^SPX, ^VIX, or ^OEX option quotes data for dates after 9/30/2019, please go to the End of Day Option Quotes (https://datashop.cboe.com/option-quotes
) or End of Day Option Quotes with Calcs (https://datashop.cboe.com/option-quotes-end-of-day-with-calcs
) pages for similar datasets. Both EOD Option Quotes datasets provide data beginning in 2004 for all equity and index options.