Problem:
A trader buys 100 European call options with a strike of $20 and a time to maturity of one year. The cost of each option is $2. The price of the underlying asset proves to be $25 in one year. What is the trader's gain or loss?
A trader sells 100 European put options with a strike of $50 and a time to maturity of six month. The price received for each option is $4. The price of the underlying asset is $41 in six month. What is the trader's gain or loss?