Options: VIX & SPX
@OptionsTutor：
$Cboe Volatility Index(VIX)$ 1) What is VIX? The Cboe Volatility Index is an up-to-date market estimate of expected volatility, calculated using real-time S&P 500 (SPX) options bid/ask quotes. Only SPX options that expire on Friday are used to calculate the VIX index. (The VIX index is calculated from 2:15 AM to 8:15 AM ET and from 8:30 AM to 3:15 PM ET. It calculates the VIX by weighting SPX options with expirations greater than 23 days and less than 37 days as of Friday, and then produces a 30-day constant measure of expected volatility in the S&P 500) VIXW (Weekly Expirations) is called volatility index cycle option 2) CBOE Chicago Board Options Exchange established the options trading market, l