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What Is the Relationship between Vega and Time to Expiration?

Vega is generally higher for options with a longer time to expiration. More time means that changes in implied volatility have a greater impact on the option's total value because the volatility has more time to play out.

Vega decreases as expiration approaches.

How Does a Longer Time to Expiration Affect the Initial Time Value?
Does a Long-Term Option or a Short-Term Option Typically Have a Higher Vega?
How Does a Longer Time to Expiration Affect the Option Premium?
How Does a Longer Time to Expiration Mitigate the Immediate Impact of Theta?