A call and put expire in 0.41 year and have an exercise price of
$100. The underlying stock is worth $90 and has a standard
deviation of 0.25. The annual risk-free rate is 11 percent. The
annual dividend yield (q) on the stock is 2%. The put option price
from the three-period binomial model is:
As per Black Scholes Model | ||||||
Value of put option = N(-d2)*K*e^(-r*t)-(S*e^(q*t))*N(-d1) | ||||||
Where | ||||||
S = Current price = | 90 | |||||
t = time to expiry = | 0.41 | |||||
K = Strike price = | 100 | |||||
r = Risk free rate = | 11.0% | |||||
q = Dividend Yield = | 2% | |||||
σ = Std dev = | 25% | |||||
d1 = (ln(S/K)+(r-q+σ^2/2)*t)/(σ*t^(1/2) | ||||||
d1 = (ln(90/100)+(0.11-0.02+0.25^2/2)*0.41)/(0.25*0.41^(1/2)) | ||||||
d1 = -0.34763 | ||||||
d2 = d1-σ*t^(1/2) | ||||||
d2 =-0.34763-0.25*0.41^(1/2) | ||||||
d2 = -0.507708 | ||||||
N(-d1) = Cumulative standard normal dist. of -d1 | ||||||
N(-d1) =0.635941 | ||||||
N(-d2) = Cumulative standard normal dist. of -d2 | ||||||
N(-d2) =0.694171 | ||||||
Value of put= 0.694171*100*e^(-0.11*0.41)-90*e^(-0.02*0.41)*0.635941 | ||||||
Value of put= 9.59 |
A call and put expire in 0.41 year and have an exercise price of $100. The...
A call and put expire in 0.41 year and have an exercise price of $100. The underlying stock is worth $90 and has a standard deviation of 0.25. The annual risk-free rate is 11 percent. The annual dividend yield (q) on the stock is 2%. The put option price from the three-period binomial model is: 8.67 9.467 9.207 7.593
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