Question 17.
You have the following information for a three-month Call option. S(0): 150 kr
X: Call: rf: T:
140 kr 12 kr
1%
3 months
(S(0) = Stock price at time 0, X = Strike price, Call = price or a Call option, rf = the risk free rate, T = time to maturity)
a) How much is a three month Put option worth with the same strike and underlying asset?
b) What would rf have to be for the Put to be worth 2 kr?
Part (a)
Recall the call put parity equation:
Hence, 12 + 140 / (1 + 1%)3/12 = 150 + P
Hence, P = 12 + 139.65 - 150 = 1.65 kr
Part (b)
If P = 2 kr
then, 12 + 140 / (1 + r)3/12 = 150 + 2
Hence, 140 / (1 + r)3/12 = 152 - 12 = 140
Hence, (1 + r)3/12 = 1 = 13/12
Hence, 1 + r = 1
Hence, r = 1 - 1 = 0
Hence, rf has to be 0% to enable the Put to have a price of 2 kr
Question 17. You have the following information for a three-month Call option. S(0): 150 kr X:...
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