How Does Implied Volatility (IV) Affect an Option’s Premium?

Implied volatility (IV) represents the market's expectation of future price swings in the underlying asset. It is the only input to an options pricing model that is not directly observable.

When IV increases, the probability of the option expiring in-the-money rises, thus increasing the option's premium. Conversely, a decrease in IV lowers the premium.

IV is directly proportional to the option price.