All option guides
Options decision guide5 minute read
Option volatility skew explained
Understand option volatility skew, the decision it supports, and the pricing and execution risks to check before acting
Prepared by Mark · Primary sources below
Direct answer
Volatility skew means options on the same underlying and expiration can trade with different implied volatilities across strikes. The pattern shows how market prices differ from a flat-volatility assumption; it does not by itself reveal which contract is mispriced or where the stock will move. Equity downside puts often carry different IV from at-the-money or upside options because demand, tail-risk concerns, supply, and contract mechanics differ.
Option volatility skew: the core structure
Volatility skew means options on the same underlying and expiration can trade with different implied volatilities across strikes. The pattern shows how market prices differ from a flat-volatility assumption; it does not by itself reveal which contract is mispriced or where the stock will move.
Option volatility skew: the variables to compare
Equity downside puts often carry different IV from at-the-money or upside options because demand, tail-risk concerns, supply, and contract mechanics differ. Compare strikes within one timestamp and expiration, then inspect how the pattern changes across maturities to form a volatility surface.
Option volatility skew: the risk that remains
A high-IV wing may remain high, become steeper, or collapse, so buying the lowest or selling the highest point is not a complete strategy. Include delta, premium, liquidity, event timing, carry, assignment risk, and a full repricing scenario before acting on skew.
Common questions
What does option volatility skew help explain?
Volatility skew means options on the same underlying and expiration can trade with different implied volatilities across strikes. The pattern shows how market prices differ from a flat-volatility assumption; it does not by itself reveal which contract is mispriced or where the stock will move.
What should I check before using option volatility skew?
Equity downside puts often carry different IV from at-the-money or upside options because demand, tail-risk concerns, supply, and contract mechanics differ. Compare strikes within one timestamp and expiration, then inspect how the pattern changes across maturities to form a volatility surface. A high-IV wing may remain high, become steeper, or collapse, so buying the lowest or selling the highest point is not a complete strategy. Include delta, premium, liquidity, event timing, carry, assignment risk, and a full repricing scenario before acting on skew.
Sources and further reading
Apply this idea to an option
Choose a contract and target to keep price, time, and volatility assumptions visible in one analysis
Analyze my option