You happen to be checking the newspaper and notice an arbitrage opportunity. The current stock price of Intrawest is $20 per sha
re and the one-year risk-free interest rate is 8%. A one- year put on Intrawest with a strike price of $18 sells for $3.33, while the identical call sells for $7. Explain what you must do to exploit this arbitrage opportunity.
The call price ($7) is over price, so we should sell call and buy underlying ($6.67). After one year, the underlying option will get a gain of $0.33 ($7-$6.67). So, we should exploit this arbitrage opportunity.