NO.PZ2020033003000094
问题如下：
Which of the following measure is least likely to be used by a securitized product backed by student loans and mortgages?
选项：
A.Single monthly mortality (SMM)
B.Constant prepayment rate (CPR)
C.Public Securities Association (PSA)
D.Debt service coverage ratio (DSCR)
解释：
D is correct.
考点：Performance Measures for Securitized Structures
解析：
The single monthly mortality (SMM), constant prepayment rate (CPR) and the Public Securities Association (PSA) method are common methodologies used to estimate prepayments for student loans and mortgages.
可以解读一下这一题吗？
