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.