Exercise 23.2.2 Consider a short rate model such that the two equally probable short rates from the

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Exercise 23.2.2 Consider a short rate model such that the two equally probable short rates from the current rate r are reμ+σ

t and reμ−σ

t , where μ may depend on time. Verify that this model can result from the binomial interest rate tree when the volatilities σj are all equal to some constant σ. (The μ is varied to fit the term structure.)

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