Reference no: EM131237832
Show that, if C is the price of an American call option on a futures contract when the strike price is K and the maturity is T, and P is the price of an American put on the same futures contract with the same strike price and exercise date, then
where F0 is the futures price and r is the risk-free rate. Assume that r > 0 and that there is no difference between forward and futures contracts. (Hint: Use an analogous approach to that indicated for Problem)
Problem :
Show that, if C is the price of an American call with exercise price K and maturity T on a stock paying a dividend yield of q, and P is the price of an American put on the same stock with the same strike price and exercise date, then
where S0 is the stock price, r is the risk-free rate, and r > 0. (Hint: To obtain the first half of the inequality, consider possible values of:
Portfolio A : a European call option plus an amount K invested at the risk-free rate
Portfolio B: an American put option plus e-qT of stock with dividends being reinvested in the stock.
To obtain the second half of the inequality, consider possible values of:
Portfolio C : an American call option plus an amount Ke-rT invested at the riskfree rate
Portfolio D : a European put option plus one stock with dividends being reinvested in the stock.)
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Calculate bounds for the price of a three month american put
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