Trading term

What is Expiration (options)?

Expiration is the date an option contract ends. After it, the option ceases to exist — it's either exercised (if it has value) or expires worthless. Because options are wasting assets, their time value erodes as expiration approaches, a decay that accelerates in the final weeks.

Every option has a finite life, ending on its expiration date. Up to that point the holder can exercise the right (buy or sell at the strike) or, far more commonly, sell the option to someone else. At expiration, an option that's 'in the money' is typically exercised or settled automatically, while one that's 'out of the money' expires worthless — the buyer's premium is gone. This finite lifespan is the crucial difference between an option and owning the stock outright, which never expires.

Because the clock is always running, an option is a 'wasting asset.' Part of its premium is 'time value' — the extra worth of having more time for the stock to move — and that time value decays toward zero as expiration nears, a process called theta decay. The decay isn't linear: it accelerates sharply in the last few weeks. So a call buyer can be right about direction yet still lose if the move comes too late. Choosing an expiration is choosing how much time — and how much premium — to buy.