With intense competition for originations of jumbo mortgages, the correspondent channel is experiencing volatility, according to an analysis by Inside Nonconforming Markets. A survey of major players in the market shows correspondent production of jumbo loans rose sharply from the first to the second quarter, though volumes and market share are down on an annual basis. Among a group of lenders that generated $55.77 billion in jumbo originations in the second quarter ... [Includes one data chart]