Vega Quant Interview Guide
Vega quant interview guide for volatility sensitivity, implied volatility, expiry, moneyness, examples, hedging caveats, and smile risk.
Candidates preparing for implied volatility and options risk prompts.
Vega measures volatility sensitivity
Vega describes how option value changes when implied volatility changes. Options with more uncertainty about future payoff usually have meaningful vega exposure.
Expiry and moneyness matter
Vega is often larger for options with more time to expiry and can be strongest near the money. The exact exposure depends on model and surface assumptions.
Concrete example
If implied volatility rises, a long option position with positive vega can gain value even if the underlying price does not move much.
Volatility surface risk remains
A single vega number does not capture every strike and expiry movement. Smile, skew, term structure, and liquidity can change in different ways.
Common mistakes
Candidates often treat vega as exposure to realized volatility. Vega is sensitivity to implied volatility in the pricing model, while realized volatility affects hedging outcomes.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.