Glossary Detail: Implied Volatility (IV)
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Backtesting Implied Volatility (IV) on High-Beta Names
The market's forecast of future price movement, derived from option prices. Higher IV = more expensive options and larger expected moves.
Further Details:
Implied Volatility is the market's consensus estimate of how much a stock will move over a given period, expressed as an annualized percentage. Unlike historical volatility (what actually happened), IV is forward-looking — it's 'implied' by current option prices using the Black-Scholes model.