Why did options buyers' exercise request fail?

In actual trading, some traders may wonder why their exercise requests are unsuccessful.

It's important to pay attention to the following situations:

I. Not meeting automatic exercise conditions  

According to the OCC's rules, automatic exercise of U.S. stock options will only occur if the following conditions are satisfied:

• For Long Call Options: On the expiration date, if the option is in the money (ITM), the underlying asset's price must be ≥ $0.01 above the strike price for the option to be automatically exercised.

• For Long Put Options: On the expiration date, if the option is in the money (ITM), the underlying asset's price must be ≤ $0.01 below the strike price for the option to be automatically exercised.

For example, if you hold an NVDA 240816 120.00C option and on the exercise effective date the closing price of NVIDIA's stock is exactly $120.00, the system will not execute the exercise operation because the option does not meet the automatic exercise conditions.

Why does this rule exist?  

This regulation is in place to protect investors. Exercise requests are submitted during trading hours, but the exercise itself is processed after the market closes. If an investor submits an exercise request while the option is still in the money, but then the stock price drops during the day to out of the money, exercising could lead to an immediate loss.

What happens when the option does not meet automatic exercise conditions?  

• At Expiration: If the option has expired, it becomes worthless, and you lose the opportunity to close the position. It is advisable to anticipate this and choose to close the position before expiration to potentially recoup some of your invetment.

• Early Exercise: The exercise request will be rejected, and you can choose to close the position or take other actions on subsequent trading days. If you wish to exercise under any circumstances (even if it leads to a loss), you can contact customer service to request an out-of-the-money exercise.

II. Insufficient buying power in the account  

Exercising an option requires sufficient buying power in your account. The broker will simulate the exercise to ensure that you have enough funds to complete the exercise before the market closes on the effective date. If your account lacks sufficient buying power or if exercising would put your account in a "danger" risk management state, the exercise will not be executed. (You can check the risk level in your account.)

What happens when there is insufficient buying power?  

• At Expiration: If you fail to provide sufficient margin in time, there is a risk of forced liquidation. Ensure you have enough margin to avoid this risk.

• Early Exercise: The exercise request will be rejected, and you can choose to close the position or take other actions on subsequent trading days.

III. Exercise lapse option without actively closing the position  

If you previously waived your right to exercise and did not actively close the position, the system will not automatically exercise for you at expiration, whether the option is in the money or out of the money. It is recommended to close the position in advance; otherwise, the option will expire worthless.

(Note: Pay special attention to this!!!)

In other words, if you choose to waive your right to exercise, the system assumes you don't want to take action on that option. Therefore, to prevent your option from becoming invalid after expiration—regardless of whether it's in the money—you must actively close the position before expiration. The system will not automatically exercise the option for you.