Implied Volatility Quant Interview Guide
Implied volatility quant interview guide for model-implied inputs, option prices, realized volatility contrast, examples, and caveats.
Candidates discussing market prices, volatility, and options valuation.
Implied volatility backs out a model input
Implied volatility is the volatility input that makes a pricing model match the observed option price. It is inferred from market price, not directly observed from future returns.
It differs from realized volatility
Realized volatility is what actually occurs over a period. Implied volatility is the market-priced model input before the period, so the two can differ for risk premium and expectation reasons.
Concrete example
If an option price rises while other inputs stay fixed, the implied volatility backed out by the model usually rises. The market is pricing more option value.
Use model language carefully
Implied volatility depends on the pricing model and contract details. It is a quote convention and risk summary, not a guaranteed forecast.
Common mistakes
Candidates often say implied volatility is what volatility will be. A better answer says it is the volatility implied by the option price under a model.
Practice the pattern
Use the LeetQuidity curriculum and calibration to turn this topic into a focused practice plan.