Why do some MSA series values show “na” instead of a number value?
As part of Freddie Mac’s review of the MSA series of the CMHPI, we put in place two sample size requirements to assure a minimum level of statistical robustness to the estimated values. These requirements are that there be at least 1000 matched transaction pairs for an MSA cumulatively and that there be at least 10 matched transaction pairs in each quarter. When an MSA fails either test a value of “na” is used for that quarter’s value.
