Underwriting standards for the mortgages included in prime non-agency mortgage-backed securities in the third quarter were largely unchanged from the types of loans seen in the market the past year, according to a new analysis by Inside Nonconforming Markets. The average credit score on prime non-agency MBS issued in the third quarter was 770.3, down from 772.3 the previous quarter but up from 766.4 in the third quarter of 2016. Average debt-to-income ... [Includes one data chart]