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In the case of VIX, the option prices used are the S&P 500 index option prices. [13] [14] The VIX takes as inputs the market prices of the call and put options on the S&P 500 index for near-term options with more than 23 days until expiration, next-term options with less than 37 days until expiration, and risk-free U.S. treasury bill interest ...
In finance, the expiration date of an option contract (represented by Greek letter tau, τ) is the last date on which the holder of the option may exercise it according to its terms. [1] In the case of options with "automatic exercise", the net value of the option is credited to the long and debited to the short position holders.
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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.
The term "triple witching" refers to the extra volatility resulting from the expiration dates of the three financing instruments, and is based on the witching hour denoting the active time for witches. It is used often and is considered industry jargon, along with the synonym, Freaky Friday. [2]
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