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actual historical volatility which refers to the volatility of a financial instrument over a specified period but with the last observation on a date in the past near synonymous is realized volatility, the square root of the realized variance, in turn calculated using the sum of squared returns divided by the number of observations.
Historical volatility (HV) is a statistical measure of a stock’s price fluctuations over a specific period in the past. It’s calculated using historical price data.
CBOE also calculates the Nasdaq-100 Volatility Index (VXNSM), CBOE DJIA Volatility Index (VXDSM) and the CBOE Russell 2000 Volatility Index (RVXSM). [6] There is even a VIX on VIX (VVIX) which is a volatility of volatility measure in that it represents the expected volatility of the 30-day forward price of the CBOE Volatility Index (the VIX). [10]
IVX is the abbreviation of Implied Volatility Index and is a popular measure of the implied volatility [1] of each individual stock. [2] IVX represents the cost level of the options for a particular security and comparing to its historical levels one can see whether IVX is high or low and thus whether options are more expensive or cheaper.
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 ...
Bottom line: The VIX Index is not a useful or reliable indicator of long-term stock market value. From long to short On the other hand, there is quite a bit of evidence to support the validity of ...
Historical volatility is a direct measure of the movement of the underlying’s price (realized volatility) over recent history (e.g. a trailing 21-day period). Implied volatility, in contrast, is determined by the market price of the derivative contract itself, and not the underlying.
Implied volatility, a forward-looking and subjective measure, differs from historical volatility because the latter is calculated from known past returns of a security. To understand where implied volatility stands in terms of the underlying, implied volatility rank is used to understand its implied volatility from a one-year high and low IV.