Banks of all sizes reported sharp declines in their mortgage banking earnings during the third quarter of 2013, according to a new analysis by Inside Mortgage Trends. The refrain from bank management was virtually unanimous: mortgage production dropped significantly and gain-on-sale margins narrowed. Although mortgage servicing right values continued to climb, that doesn’t always translate into improved earnings on that side of the business. A diverse group of 19 lenders – including all ... [Includes one data chart]