# Question: The default rates in the last 15 years for a

The default rates in the last 15 years for a certain category of loans is 2%, 4%, 7%, 12%, 6%, 5%, 8%, 14%, 10%, 2%, 3%, 2%, 6%, 7%, 9%. Use the maximum likelihood method to calculate the best fit values of the parameters in Vasicek’s model. What is the probability distribution of the default rate? What is the 99.9% worst case default rate?

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