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What Is a ‘Volatility Skew’ in Options Pricing?

Volatility skew is a phenomenon where options with the same expiration date but different strike prices have different implied volatilities. Historically, a 'smirk' (higher IV for OTM puts than OTM calls) is common, reflecting higher demand for downside protection (puts) due to fear of market crashes.

Explain the Concept of the “Volatility Smile” or “Volatility Skew”
Why Do Different Options on the Same Underlying Asset Often Have Different Implied Volatilities?
Is the Overhead Different for ZK-SNARKs versus ZK-STARKs?
What Is the Volatility Skew in Options Pricing?