The common stock of the P.U.T.T. Corporation has been trading in a narrow price range for the past month, and you are convinced it is going to break far out of that range in the next 3 months. You do not know whether it will go up or down, however. The current price of the stock is $120 per share, and the price of a 3-month call option at an exercise price of $120 is $8.89.

a. If the risk-free interest rate is 8% per year, what must be the price of a 3-month put option on P.U.T.T. stock at an exercise price of $120? (The stock pays no dividends.)

Put-call parity

b. What would be a simple options strategy to exploit your conviction about the stock price's future movements. How far would it have to move in either direction for you to make a profit on your initial investment?

Total cost of the straddle