At What Point in an Option’s Life Is Theta Decay Typically the Fastest?
Theta decay is typically the fastest in the final 30 to 45 days leading up to expiration, and it accelerates significantly in the last few weeks. This acceleration is most pronounced for At-the-Money (ATM) and near-the-money options.
The rapid decay reflects the quickly diminishing time for the underlying asset's price to move favorably, making the time value component drop sharply.