Exercise 25.2.11 Suppose we want to calculate the price of some interest-ratesensitive security by using the binomial tree for the CIR or the Vasicek model.

Assume further that we opt for the Monte Carlo method with antitheticvariates .

One difficulty with the standard paradigm covered in Subsection 18.2.3 is that, here, the probability at each node varies, and all paths are hence not equally probable.

How do we handle this difficulty?