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by | Dec 22, 2013 | Publications. VIX is a measure of expected volatility calculated as 100 times the square root of the expected 30-day variance (var) of the S&P 500 rate of return. The variance is annualized and VIX expresses volatility in percentage points.
Definition of the VIX (Volatility Index): The VIX is an indicator of the stock market's expected movement (up or down) over the next 30 days. The VIX number itself is simply the annualized expected movement (up or down) of the SandP500 Index over the next 30 days. The general media sometimes refers to the VIX as the fear index because lately the markets have focused on the down side risk of another market crash rather than the up side hope of a strong bull market recovery.