Answer: exercise price

## Explanation **Volatility Smile Definition:** The volatility smile refers to the pattern where **implied volatility** varies with the **exercise price** (strike price) of options with the same expiration date. **Key Characteristics:** - **X-axis**: Exercise price (strike price) - **Y-axis**: Implied volatility - **Pattern**: Typically shows higher implied volatility for deep in-the-money and deep out-of-the-money options compared to at-the-money options **Why It's Called a "Smile":** - When plotted, the curve often resembles a smile shape - Higher implied volatility at both low and high strike prices - Lower implied volatility at near-the-money strike prices **Causes of Volatility Smile:** 1. **Market expectations of extreme price movements** (fat tails in return distribution) 2. **Supply and demand imbalances** for different strike options 3. **Market crash fears** leading to higher demand for out-of-the-money puts **Correct Answer: B (exercise price)** The volatility smile specifically describes how implied volatility changes with respect to different exercise prices for options with the same expiration date.

Author: LeetQuiz Editorial Team