Quick Answer
Ordinary cash dividends don't change an option's contract terms, but the ex-date price drop moves premiums: calls decrease, puts increase. The same dividend also creates the most common reason for early exercise, a deep-ITM call exercised the day before the ex-date to capture the dividend, when the remaining time value is less than the payout.
We covered earlier that ordinary cash dividends don't adjust option contract terms. But dividends still have a significant impact on options: they affect premiums and create the most common scenario for early exercise.
How Does the Ex-Dividend Date Affect Premiums?
On the ex-dividend date, the stock price typically drops by approximately the dividend amount. This price change ripples through to option premiums:
| Effect | Call Premiums | Put Premiums |
|---|---|---|
| Stock price drops on ex-date | Decrease (calls less valuable when stock falls) | Increase (puts more valuable when stock falls) |
- These changes are anticipated by the market and reflected in premium pricing before the ex-date
- For an ordinary cash dividend, contract terms (strike price, contract size) do not change; only the premium adjusts based on supply and demand. OCC retains discretion to treat an unusually large or non-recurring cash distribution as non-ordinary and adjust the contract
Exam Tip: Gotchas
- Ordinary cash dividends don't change contract terms but DO affect premiums. The strike price and contract size stay the same; only the premium moves. A large special cash distribution can be treated as non-ordinary and trigger an adjustment.
- Calls decrease in value around ex-dates; puts increase. The stock price drop on the ex-date hurts call holders and helps put holders.
When Does a Dividend Trigger Early Exercise?
The most common reason for early exercise of an American-style call option is to capture an upcoming dividend.
Here's the logic:
- A call holder has the right to buy stock but does not own the stock
- Only stockholders of record receive dividends
- To capture the dividend, the call holder must exercise the option and take delivery of the stock before the ex-dividend date
When Early Exercise Is Most Likely
A call holder is most likely to exercise early when all three conditions are met:
- The call is deep in the money (high intrinsic value)
- The remaining time value is less than the dividend amount (exercising forfeits time value, so the dividend must be worth more)
- Expiration is relatively near (less time value remaining to forfeit)
Timeline
- The holder exercises the call on the day before the ex-dividend date
- By exercising, they take ownership of the stock and qualify for the dividend
- The writer of that call faces elevated assignment risk the day before the ex-date
Exam Tip: Gotchas
- Early exercise happens the day BEFORE the ex-date, not on the ex-date. The holder must own stock before the ex-date to qualify for the dividend.
- Time value must be less than the dividend for early exercise to make economic sense. Exercising forfeits remaining time value, so the dividend needs to exceed that amount.
- Short call writers face the highest assignment risk right before the ex-dividend date. If your short call is deep ITM near a dividend, expect assignment.
- Early exercise of American-style calls almost always relates to dividend capture. If a question asks "When is a call most likely to be exercised early?", the answer is: the day before the ex-dividend date on a deep in-the-money (ITM) call where time value is less than the dividend.
What Should You Check on Exam Day?
- Contract terms don't change for an ordinary cash dividend; only the premium reacts to the price drop
- Calls lose value and puts gain value around the ex-date
- Early exercise needs all three conditions: deep ITM, time value less than the dividend, and expiration relatively near
- It happens the day before the ex-date, not on it, and it is the writer's highest assignment-risk moment