Consider two portfolios A and B. At the expiration date, t, both portfolios have identical payoffs. Portfolio A consists of a put option and one share of stock. Portfolio B has a call option (with the same strike price and expiration date as the put option) and cash in the amount equal to the present value (PV) of the strike price discounted at the continuously compounded risk-free rate, which is Xe−rRFtXe−rRFt. At expiration, the stock price is Ptt, and the value of this cash will equal the strike price, X. As defined in the Black–Scholes model, let N(didi) stand for probability that a deviation less than didi will occur in a standard normal distribution and N(d₁) and N(d₂) represent areas under a standard normal distribution function. Complete the equation for the value of a put option.
Consider two portfolios A and B. At the expiration date, t, both portfolios have identical payoffs. Portfolio A consists of a put option and one share of stock. Portfolio B has a call option (with the same strike price and expiration date as the put option) and cash in the amount equal to the present value (PV) of the strike price discounted at the continuously compounded risk-free rate, which is Xe−rRFtXe−rRFt. At expiration, the stock price is Ptt, and the value of this cash will equal the strike price, X. As defined in the Black–Scholes model, let N(didi) stand for probability that a deviation less than didi will occur in a standard normal distribution and N(d₁) and N(d₂) represent areas under a standard normal distribution function. Complete the equation for the value of a put option.
Chapter8: Analysis Of Risk And Return
Section: Chapter Questions
Problem 6P
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Consider two portfolios A and B. At the expiration date, t, both portfolios have identical payoffs. Portfolio A consists of a put option and one share of stock. Portfolio B has a call option (with the same strike price and expiration date as the put option) and cash in the amount equal to the present value (PV) of the strike price discounted at the continuously compounded risk-free rate, which is Xe−rRFtXe−rRFt. At expiration, the stock price is Ptt, and the value of this cash will equal the strike price, X.
As defined in the Black–Scholes model, let N(didi) stand for probability that a deviation less than didi will occur in a standard normal distribution and N(d₁) and N(d₂) represent areas under a standard normal distribution function.
Complete the equation for the value of a put option.
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