Underwriting standards on the four prime non-agency mortgage-backed securities issued in the first quarter of 2016 loosened marginally compared with the typical prime jumbo MBS issued in recent years, according to a new analysis by Inside Nonconforming Markets. The combined loan-to-value ratio on prime non-agency MBS issued in the first quarter of 2016 averaged 69.8 percent. That was somewhat higher than the average combined ... [Includes one data chart]