Implied Volatility - IV

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Dictionary Says

Definition of 'Implied Volatility - IV'

The estimated volatility of a security's price. In general, implied volatility increases when the market is bearish and decreases when the market is bullish. This is due to the common belief that bearish markets are more risky than bullish markets.

Implied volatility is sometimes referred to as "vols."
Investopedia Says

Investopedia explains 'Implied Volatility - IV'

In addition to known factors such as market price, interest rate, expiration date, and strike price, implied volatility is used in calculating an option's premium. IV can be derived from a model such as the Black-Scholes Model.

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