Quote from KAWill70:
Is this correct? Did you mean 90?
If you sell a covered call at a strike price of 100, and the stock rises to 110, isn't the option buyer ten dollars in the money?
He would exercise if still in the money at expiration.
CORRECT!
Once the option closes at expiration at least $.25 ITM (I think that level is correct, but it may be different) The option will be exercised. That being said you will be on the hook for the difference between the strike you SOLD and the expiration price.
The Stocks you have will probably be assigned to cover the shortage.
Infact they are gonna expire worthless for the buyer.