CBOE Indexes



The CBOE (Chicago Board Options Exchange) Volatility Index (VIX) is a key measure of market expectations of near-term volatility conveyed by S&P 500 stock index option prices. The VIX measures the market's expectation of 30-day volatility. The VIX is based on S&P 500 index option prices and incorporates information from the volatility skew by using a wider range of strike prices rather than just at-the-money series.