Answer :
Purchasing 500.00 shares of the non dividend paying stock is necessary to hedge the traders position at the time of the trade
What is Stock hedging?
Stock hedging means the act of buying investment which are designed to reduce the loss risk from another investment.
T = 4 months = 4/12 = 1/3 year
n = 2
t = T/n = 2/2 = 2 months = 2/12 = 1/6 years
u = 1.1303
d = 1/u = 1/1.1303 = 0.8847
p = (ert - d) / (u - d)
p = (e^3% x 1/6 - 0.8847) / (1.1303 - 0.8847)
p = 48.98%
Su = S0 x u
Su = 78 x 1.1303
Su = 88.16
Sd = S0 x d
Sd = 78 x 0.8847
Sd = 69.01
Suu = u x Su
Suu = 1.1303 x 88.16
Suu = 99.65
Sud = Su x d
Sud = u x Sd
Sud = 78
Sdd = d x Sd
Sdd = 61.05
Cuu = max (Suu - K, 0)
Cuu = max (99.65 - 80, 0)
Cuu = 19.65
Cud = max (Sud - K, 0)
Cud = max (78 - 80, 0)
Cud = 0
Cdd = max (Sdd - K, 0)
Cdd = max (671.05 - 80, 0)
Cdd = 0
Cu = [p x Cuu + (1 - p) x Cud]e-rt
Cu = [48.98% x 19.65 + (1 - 48.98%) x 0]e-3% x 1/6
Cu = 9.58
Cd = [p x Cud + (1 - p) x Cdd]e-rt
Cd = 0
Value of a four-month European call option = [p x Cu + (1 - p) x Cd]e-rt = [48.98% x 9.58 + (1 - 48.98%) x 0]e^-3% x 1/6
Value of a four-month European call option = 4.67
Since the trader has sold call options, he need to buy:
= (Cu - Cd) / (Su - Sd) * N
= (9.58 - 0) / (88.16 - 69.01) * 1,000
= 500.00 shares.
In conclusion, purchasing 500.00 shares of the non dividend paying stock is necessary to hedge the traders position at the time of the trade.
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