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The VIX is an index run by the Chicago Board Options Exchange, now known as Cboe, that measures the stock market’s expectation for volatility over the next 30 days based on option prices for the ...
The price of this option is influenced by multiple factors, including the stock’s current price, the option’s strike price, time to expiration and implied volatility. If the market expects a ...
The resulting VIX index formulation provides a measure of market volatility on which expectations of further stock market volatility in the near future might be based. The current VIX index value quotes the expected annualized change in the S&P 500 index over the following 30 days, as computed from options-based theory and current options ...
Volatility index (VIX): Often referred to as the “fear index,” the VIX measures market expectations for future volatility. It is calculated based on the prices of options on the S&P 500 index.
CBOE Volatility Index (VIX) from December 1985 to May 2012 (daily closings) In finance, volatility (usually denoted by "σ") is the degree of variation of a trading price series over time, usually measured by the standard deviation of logarithmic returns. Historic volatility measures a time series of past market prices.
Although it is an excellent measure of averaged implied volatility of the stock, the IVX sometimes cannot be calculated for stocks with illiquid options that have no volume traded and a huge spread in prices. This is because none of the option models will produce good volatility measure using the options with unreliable prices.