Certain pools that are secured by "qualifying residential mortgages" ("QRMs") are exempt from the Risk Retention Rules. The definition of a QRM is a loan that is a "qualified mortgage" as defined in TILA Section 1639C and the CFPB's regulations thereunder; i.e., Regulation Z, Rule 1026.43(e).
The relevant qualified mortgage definitions are provided below. Otherwise, this topic page focus on QRMs. See also the separate topic pages on Credit Risk Retention and on Qualified Mortgages and Ability to Repay.