VIX - CBOE Volatility Index

VIX (CBOE Volatility Index) computes volatility of four OEX contracts in two nearby months and is published daily by the CBOE. Options selected for this index are one call and one put just out of the money, and one call and one put just in the money, for each of the two front months of the OEX (S&P 100). Extremely high readings of VIX indicate bottoms and low readings tops.