Question: c) Consider a trinomial model with r = 0, T = 1, So = 1 and 1.1 with probability ? ST = 1 with probability

 c) Consider a trinomial model with r = 0, T =

1, So = 1 and 1.1 with probability ? ST = 1

c) Consider a trinomial model with r = 0, T = 1, So = 1 and 1.1 with probability ? ST = 1 with probability 0.9 with probability ?. Is the portfolio h = (-1, 1) a super-replication portfolio, a sub-replication portfolio or neither of these for an at-the money call option? d) Let a, b > 0 and let W = (We)to be a Wiener process. What is the covariation [a . W, b . W] (T)

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