Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Options profit calculation and cash settlement
The other two answers seem basically correct, but I wanted to add on thing:  While you can exercise an "American style" option at any time, it's almost never smart to do so before expiration.  In your example, when the underlying stock reaches $110, you can theoretically make $2/share by exercising your option (buying 100 shares @ $108/share) and immediately selling those 100 shares back to the market at $110/share.  This is all before commission. In more detail, you'll have these practical issues: You are going to have to pay commissions, which means you'll need a bigger spread to make this worthwhile.  You and those who have already answered have you finger on this part, but I include it for completeness. (Even at expiration, if the difference between the last close price and the strike price is pretty close, some "in-the-money" options will be allowed to expire unexercised when the holders can't cover the closing commission costs.) The market value of the option contract itself should also go up as the price of the underlying stock goes up.  Unless it's very close to expiration, the option contract should have some "time value" in its market price, so, if you want to close your position at this point, earlier then expiration, it will probably be better for you to sell the contract back to the market (for more money and only one commission) than to exercise and then close the stock position (for less money and two commissions). If you want to exercise and then flip the stock back as your exit strategy, you need to be aware of the settlement times.  You probably are not going to instantly have those 100 shares of stock credited to your account, so you may not be able to sell them right away, which could leave you subject to some risk of the price changing.  Alternatively, you could sell the stock short to lock in the price, but you'll have to be sure that your brokerage account is set up to allow that and understand how to do this.