# Question: Suppose that S 100 30 r

Suppose that S = $100, σ = 30%, r = 8%, and δ = 0. Today you buy a contract which, 6 months from today, will give you one 3-month to expiration at-the-money call option. (This is called a forward start option.) Assume that r, σ, and δ are certain not to change in the next 6 months.

a. Six months from today, what will be the value of the option if the stock price is $100? $50? $200? (Use the Black-Scholes formula to compute the answer.) In each case, what fraction of the stock price does the option cost?

b. What investment today would guarantee that you had the money in 6 months to buy an at-the-money option?

c. What would you pay today for the forward start option in this example?

d. How would your answer change if the option were to have a strike price that was 105% of the stock price?

a. Six months from today, what will be the value of the option if the stock price is $100? $50? $200? (Use the Black-Scholes formula to compute the answer.) In each case, what fraction of the stock price does the option cost?

b. What investment today would guarantee that you had the money in 6 months to buy an at-the-money option?

c. What would you pay today for the forward start option in this example?

d. How would your answer change if the option were to have a strike price that was 105% of the stock price?

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