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What is the value of a European call option if the underlying stock price is $ 100 , the strike price is $ 90 , the underlying stock volatility is 40 % and the risk - free rate is 4 % ? Assume t option has 60 days to expiration

Finance Jan 24, 2021

What is the value of a European call option if the underlying stock price is $ 100 , the strike price is $ 90 , the underlying stock volatility is 40 % and the risk - free rate is 4 % ? Assume t option has 60 days to expiration

Expert Solution

As per Black Scholes Model
Value of call option = (S)*N(d1)-N(d2)*K*e^(-r*t)
Where
S = Current price = 100
t = time to expiry = 0.16667
K = Strike price = 90
r = Risk free rate = 4.0%    
q = Dividend Yield = 0%
σ = Std dev = 40%
d1 = (ln(S/K)+(r-q+σ^2/2)*t)/(σ*t^(1/2)
d1 = (ln(100/90)+(0.04-0+0.4^2/2)*0.16667)/(0.4*0.16667^(1/2))
d1 = 0.767668
d2 = d1-σ*t^(1/2)
d2 =0.767668-0.4*0.16667^(1/2)
d2 = 0.604367
N(d1) = Cumulative standard normal dist. of d1
N(d1) =0.778658
N(d2) = Cumulative standard normal dist. of d2
N(d2) =0.7272
Value of call= 100*0.778658-0.7272*90*e^(-0.04*0.16667)
Value of call= 12.85
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