The CPR for an unseasoned 100 PSA mortgage is 4.0%. What is the single monthly mortality?

Name: The CPR for an unseasoned 100 PSA mortgage is 4.0%. What is the single monthly mortality?
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The single monthly mortality rate is 0.3396%. This is because the CPR is 4.0%, which means that 4.0% of the loans will default in a year. The single monthly mortality rate is the probability that a loan will default in a given month, which is 4.0% / 12 = 0.3396%.

The CPR for an Unseasoned 100 PSA Mortgage Is 4