### Question
How is the "seasoning" defined?


### Answer
The term **seasoning** is defined in *12 U.S.C. § 4611* as follows -

> the change over time in the ratio of the unpaid principal balance of a mortgage to the value of the property by which such mortgage loan is secured, determined on an annual basis by region, in accordance with the Constant Quality Home Price Index published by the Secretary of Commerce (or any index of similar quality, authority, and public availability that is regularly used by the Federal Government)

#### Citation:
  - *12 U.S.C. § 4611*
  - Heading: **CHAPTER 46-GOVERNMENT SPONSORED ENTERPRISES > SUBCHAPTER II-REQUIRED CAPITAL LEVELS FOR ENTERPRISES AND SPECIAL ENFORCEMENT POWERS**

