Early Exercise
Early exercise allows American-style option holders to exercise their contracts before expiration, a critical feature that affects pricing and strategy.
American-style options (standard equity options) can be exercised at any time before expiration. European-style options (most index options) can only be exercised at expiration. Early exercise is rarely optimal for call options because doing so forfeits remaining time value. However, there are specific circumstances where early exercise makes financial sense. Understanding these scenarios helps both option buyers and sellers manage their positions effectively.
Early exercise of a call option is most common just before a stock's ex-dividend date. If AAPL is trading at $195, you hold a $190 call with $5 of intrinsic value and $1 of time value ($6 total). If AAPL pays a $2.50 dividend tomorrow, exercising the call today costs you $190 to buy shares, capturing the $2.50 dividend. The benefit ($2.50) exceeds the time value forfeited ($1.00), making early exercise worthwhile. For put options, early exercise may occur when the put is deep in-the-money and the holder needs cash or wants to avoid further downside risk.
Put-Call Parity and Early Exercise
Put-call parity establishes the theoretical relationship between call and put prices. For American options, the possibility of early exercise creates a divergence from European option pricing. An American call on a non-dividend stock should never be exercised early because you can always sell the call for more than its intrinsic value. For dividend-paying stocks, the optimal exercise threshold depends on the dividend amount, time to expiration, and interest rates. The general rule: exercise a call early only when the present value of dividends to be received exceeds the remaining time value of the option.
Managing Early Assignment Risk
As an option seller, you must be prepared for early assignment at any time. This is especially important around ex-dividend dates, where short calls are most vulnerable. Monitoring dividend calendars and closing short calls before ex-dates is a prudent practice. Additionally, deep in-the-money options with low time value are at risk of early assignment because the holder gains no benefit from waiting. Setting up alerts when short options approach these conditions and maintaining sufficient capital to handle assignments are essential risk management practices for options writers.
FAQs
Can I exercise an option after hours?
No. Option exercise instructions must be submitted during regular market hours. Your broker will have a specific cut-off time, typically 5:00 PM ET on the exercise date, but some require earlier notification.
Does early exercise affect the option price?
Yes, the possibility of early exercise is priced into American options, giving them slightly higher premiums than equivalent European options. This premium is called the early exercise premium.
How do I exercise an option?
Contact your broker or use their trading platform to submit an exercise request. Most brokers have an "Exercise" button in their options trading interface. Specify the option contract and number of contracts to exercise.