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.

What Is the Difference between Historical and Implied Volatility?
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