Trading volume in S&P 500 Index (SPX) options and CBOE Volatility Index (VIX) futures set new single-day records, while C2 Options Exchange (C2) experienced the busiest trading day in its history on 15 October.

Total exchange-wide options volume at Chicago Board Options Exchange (CBOE) was 10.6 million contracts (estimated) traded, just shy of the all-time record of 10.9 million contracts on 8 August 2011.
 
Trading of options on the S&P 500 Index (SPX) at CBOE set a new single-day volume record on 15 October, as 2,671,462 contracts (estimated) traded, surpassing the previous high of 2,282,029 contracts on 20 June 2013.
 
At CBOE Futures Exchange (CFE), trading of futures on the VIX set consecutive single-day volume records on 14 October and 15 October, with 616,906 contracts and 791,638 contracts (estimated) traded, respectively. These records surpassed the previous high of 528,628 VIX futures contracts on 1 August.
 
C2 set a new single-day exchange-wide volume record on 15 October, as 714,529 options contracts (estimated) traded, eclipsing the previous high of 665,789 contracts on 3 February 2014.