Problem 1. A stock sells for $50 today. The riskless rate over the period is 10%....
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Problem 1. A stock sells for $50 today. The riskless rate over the period is 10%. Assume that next period (one year) the stock will either go up by 30% (to $65), or go down by 20% (to $40). (If you want, you can assume that these happen equally likely, although you do not need to know this.) Suppose you own an out of-the money European call option on the stock, which expires in one year from now. The stock will pay no dividends until then. The strike price equals $55. (a) What is replicating portfolio for the call? (b) What is the call's current price (that is, what is the value of the replicating portfolio)? (c) What are the "risk-neutral probabilities" of the up and down moves? (q and 1-q, respectively) (d) Find again the price of the call option, this time using the risk-neutral probabilities. Problem 2. Suppose now that you consider holding the stock from the previous problem for two years, and each year it either goes up by 30% or down by 20%. The company has already announced its dividend policy: it will pay a $15 dividend immediately before the stock price goes above $70. You hold an American call option with strike price K = $55, which expires in two years. You can exercise your option today, in one year from now, or in two years. Should you exercise the option early? (Hint: There is no shortcut for this problem. You have to do the work. Draw the stock payoff diagram, and make sure you factor in the $15 dividend payment when the value of the stock is larger than $70.) Problem 1. A stock sells for $50 today. The riskless rate over the period is 10%. Assume that next period (one year) the stock will either go up by 30% (to $65), or go down by 20% (to $40). (If you want, you can assume that these happen equally likely, although you do not need to know this.) Suppose you own an out of-the money European call option on the stock, which expires in one year from now. The stock will pay no dividends until then. The strike price equals $55. (a) What is replicating portfolio for the call? (b) What is the call's current price (that is, what is the value of the replicating portfolio)? (c) What are the "risk-neutral probabilities" of the up and down moves? (q and 1-q, respectively) (d) Find again the price of the call option, this time using the risk-neutral probabilities. Problem 2. Suppose now that you consider holding the stock from the previous problem for two years, and each year it either goes up by 30% or down by 20%. The company has already announced its dividend policy: it will pay a $15 dividend immediately before the stock price goes above $70. You hold an American call option with strike price K = $55, which expires in two years. You can exercise your option today, in one year from now, or in two years. Should you exercise the option early? (Hint: There is no shortcut for this problem. You have to do the work. Draw the stock payoff diagram, and make sure you factor in the $15 dividend payment when the value of the stock is larger than $70.)
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