Sharp declines in retail originations of jumbo mortgages at a number of major lenders contributed to a decline in the channel’s share of jumbo originations in the first quarter of 2017, according to a new analysis by Inside Nonconforming Markets. The retail channel accounted for 79.3 percent of the $49.49 billion of jumbo originations reported by a diverse group of top lenders in the first quarter, down from an 82.6 percent share in the fourth quarter of 2016. Actual jumbo retail production reported by the group was...[Includes one data table]