The relatively strong mortgage origination volume late in 2016 propped up production levels in all three major channels, according to a new Inside Mortgage Finance ranking and analysis. Mortgage brokers saw the biggest decline in volume during the fourth quarter, as production slipped 6.7 percent from the previous three-month cycle to an estimated $56.0 billion. But even with the late-year decline, the wholesale-broker market had...[Includes four data tables]