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A measure of the variation in price over time. Also a measure of the risk of a financial instrument.

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days to expiration they input 45% as expected future Volatility (IV) then they expect a big move (up or down) in the underline. So to answer your question , one can not only rely on the IV value and … DTE but rather learn for the relationship between known HV and expected volatility (IV) to even begin starting to model a prediction. IMHO. …
answered Jul 8 '18 by Itai