How Does ‘Historical Volatility’ Differ from Implied Volatility?
Historical Volatility (HV) is a backward-looking measure, calculated from the standard deviation of past price movements of the underlying asset over a specific period. Implied Volatility (IV) is a forward-looking measure, derived from the current market price of the option, representing the market's expectation of future volatility.
HV is factual; IV is speculative.