The retail channel is the main source of expanded-credit mortgages, followed by brokers, according to a new analysis by Inside Nonconforming Markets based on loans in non-agency mortgage-backed securities issued since 2016. Some 57.0 percent of loans in expanded-credit MBS issued in recent years were sourced through the retail channel. And 36.6 percent came through brokers. The shares are based on deals that disclose channel sourcing ... [Includes one data chart]