Expiration Date
When an options contract expires and what happens at expiration.
The expiration date is the last day an options contract is valid. After this date, the contract ceases to exist. If the option is in the money at expiration, it is automatically exercised. If it is out of the money, it expires worthless.
Why It Matters
Expiration is the clock on every options trade. It creates the time pressure that drives theta decay, influences strategy selection, and determines how much time you are giving the market to move. Shorter expirations mean faster time decay and cheaper premiums. Longer expirations cost more but give the trade more time to work.
Misunderstanding expiration mechanics is one of the most common mistakes new traders make. Forgetting that an in-the-money option will be automatically exercised can result in unexpected stock positions or margin calls on Monday morning.
How It Works
Options expiration follows specific cycles. The most common are:
- Weekly options (weeklys): Expire every Friday. Available on liquid stocks and ETFs. Popular for short-term trades and income strategies.
- Monthly options: Expire on the third Friday of each month. The original expiration cycle and typically the most liquid.
- Quarterly options: Expire on the last business day of each quarter.
- LEAPS: Long-term options with expirations one to three years out. Used for long-term directional bets or as stock replacement strategies.
Standard equity options stop trading at 4:00 PM ET on expiration day. However, the exercise decision window extends to 5:30 PM ET, meaning after-hours price movement can still affect whether options are exercised.
Automatic exercise applies to any option that is $0.01 or more in the money at expiration. Your broker will exercise it automatically unless you instruct them not to. This means if you hold an expiring ITM option, you will end up with a stock position — long shares from a call, or short shares from a put (if you don't already own them).
Time decay accelerates as expiration approaches. An option loses roughly one-third of its time value in the last week before expiration. This acceleration is why many sellers target short-dated options and many buyers prefer at least 30-45 days to expiration.
Quick Example
You buy a call option with 45 days to expiration. Over the first 30 days, the option loses about half its extrinsic value to time decay. In the final 15 days, the remaining extrinsic value erodes rapidly. If the stock hasn't moved past your breakeven by expiration Friday, the contract expires and your entire premium is lost.