Complex sentence: VIX is the ticker symbol for the CBOE Volatility Index, a popular measure of the implied volatility of S&P 500 index options, calculated and published by the Chicago Board Options Exchange (CBOE).
Split into simpler sentences: VIX is the ticker symbol for the CBOE Volatility Index, a popular measure of the implied volatility of S&P 500 index options. The VIX is calculated by the Chicago Board Options Exchange (CBOE).