How Does Implied Volatility Affect an Option’s Delta?

Higher implied volatility (IV) generally pushes the Delta of both OTM and ITM options closer to 0.5 (or -0.5 for puts). Increased IV suggests a higher probability of the underlying price moving significantly, making OTM options more likely to become ITM and ITM options less certain to stay deep ITM.

This 'pull' towards 0.5 makes the option price more responsive to underlying price changes when IV is high.

How Can Adding or Removing Collateral Affect the Liquidation Price?
What Is the Role of Vega in Measuring IV’s Impact on Option Price?
How Does a Change in the Strike Price Affect the Delta of an Option?
How Does the Delta of a Covered Call Position Change as the Underlying Price Rises?
If Volatility Is the Main Driver, How Does the Delta of an Option Change as Σ Increases?
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Define the Term ‘Delta of a Portfolio’
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Glossar