Originations of jumbo mortgages declined across the three production channels in 2017, with retail posting the biggest decline, according to an Inside Nonconforming Markets analysis of survey responses to affiliated publication Inside Mortgage Finance. The survey respondents reported $234.21 billion in jumbo originations, down 18.0 percent from 2016, which represented about 79.4 percent of the total jumbo market. Among respondents, retail production ... [Includes one data chart]