The majority of S&P options, especially those on the S&P 500 Index, are mostly traded on the Chicago Board Options Exchange (CBOE).
When were the Zero DTE Options on S&P Introduced for Trading ?
In the year 2005, CBOE introduced Friday SPX Weekly Expiry. After 11 years, in 2016 added Monday and Wednesday expiration in addition to Friday. Finally, in 2022, filled in Tuesday and Thursday expiration, making SPX options available every trading day of the week.
S&P 500 Index is the largest traded in daily volume ~2.9 million
VIX has a daily volume of ~500,000–700,000
All are mostly traded on CBOE.
