Answer:
a) 0
b) -1
c) -4
Step-by-step explanation:
Bear spread:
Short P1 = 2.5, X1 = 25
Long P2 = 4.5, X2 = 29
Payoff at expiration = 25-29 + Max (0, 29-ST) - Max (0, 25-ST)
= Max (0,29-ST) - Max (0,25-ST) - 4
a) ST = 23
Spread profit = 6 - 2 -4 = 0
b) ST = 26
Spread profit = 3 - 4 = -1
c) ST = 33
Spread profit = -4