A number of lenders are trying to grow the expanded-credit mortgage market, but top producers in the sector saw an overall decline in originations last year, according to a new ranking by Inside Nonconforming Markets. The 15 top lenders originated $40.96 billion of expanded-credit mortgages last year, down 16.3 percent from 2016. The ECM category consists mostly of non-qualified mortgages and nonprime/Alt A loans that aren’t eligible for sale to the agencies ... [Includes one data chart]