Suppose that you have a stock in the one-period binomial model with fixed u, d,and r suchthat 0< d <1 + r < u. Suppose that there are positive numbers p1and q1such that p1,q1<1, p1+q1= 1, and (1 +r)S0=p1S1(H) +q1S1(T). Show that p1= ̃p and q1= ̃q
.Hint: You know that the risk-neutral probabilities satisfy these equations as well.
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