Global Markets
Tradable Products
Cboe Data Vantage
Analytics & Execution
Access Solutions
Indices
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8:30 a.m. to 3:15 p.m. (CT)
3:15 p.m. to 4:00 p.m. (CT)
7:15 p.m. to 8:25 a.m. (CT)
Expiring VIX/VIXW options do not trade during global trading hours on their Expiration Date.
The Cboe Volatility Index - more commonly referred to as the "VIX Index" - is an up-to-the-minute market estimate of expected volatility that is calculated by using real-time S&P 500®Index (SPX) option bid/ask quotes. Only SPX options with Friday expirations are used to calculate the VIX Index. The VIX Index is calculated between 2:15 a.m. CT and 8:25 a.m. CT and between 8:30 a.m. CT and 3:15 p.m. CT. Only SPX options with more than 23 days and less than 37 days to the Friday SPX expiration are used to calculate the VIX Index. These SPX options are then weighted to yield a constant, 30-day measure of the expected volatility of the S&P 500 Index.
