Does the Early Exercise Rule Apply Equally to American-Style Put Options?
Yes, the early exercise rule applies to American-style put options, but the optimal exercise condition is different. It can be optimal to exercise an American put early, especially if it is deep in-the-money and interest rates are high, because exercising yields immediate cash that can be invested to earn interest.
Glossar
Optimal Exercise
Calibration ⎊ Optimal exercise, within cryptocurrency options and financial derivatives, represents the process of determining the most advantageous moment to execute an option contract, maximizing expected payoff relative to inherent risk.
Early Exercise
Trigger ⎊ Early exercise, within cryptocurrency options and financial derivatives, denotes the right ⎊ but not the obligation ⎊ of the option holder to realize the intrinsic value of the contract prior to its scheduled expiration date.