If the market price of the underlying stock lands between $ 35 and $ 45, all options expire worthless. (creditdonkey.com)
If an option expires in a few weeks, the current price of the underlying stock and its recent volatility have a good deal of influence on the outcome of the option investment. (futureblind.com)
A call option is defined by the underlying stock, price of the underlying stock at which the option can be exercised — strike price — and the expiration date. (pocketsense.com)