A European call option gives the option holder the right, but not the obligation, to buy a stock at the strike price at maturity of the option. Suppose company A gives its CEO 1000 European call options at the beginning of the year and the strike price is set at the stock price at the beginning of the year, K = $50. The maturity of the option is one year. What are these options worth at the end of the year if stock price goes down to $20? goes up to $100?