Which Option Greek Measures Sensitivity to Implied Volatility?

The option Greek that measures sensitivity to implied volatility (IV) is Vega. Vega quantifies the change in the option's price for a one-percent change in the underlying asset's IV.

Options with a higher Vega are more sensitive to changes in market expectations of future volatility.

How Does Vega Differ from Gamma?
What Are ‘Vega’ and ‘Gamma’ and How Do They Relate to Options Positions during a high-IV Event?
What Is the Options Greek Letter That Measures Sensitivity to Volatility?
Which Options Greek Is Directly Affected by Volatility?
What Is the Relationship between Vega and Time to Expiration?
Which Option ‘Greek’ Measures the Sensitivity to Volatility Changes?
What Is ‘Vega’ in Options Trading and How Does It Relate to Implied Volatility?
How Does Vega Measure an Option’s Exposure to Volatility?

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