Interest-only mortgage lending increased significantly in 2012, led by originators willing to portfolio the loans. Lenders expect the originations to remain strong even though the products were singled out in the Dodd-Frank Act and subsequent ability-to-repay rule from the Consumer Financial Protection Bureau. Some $22.94 billion in IOs were originated in 2012 by 15 lenders tracked by Inside Nonconforming Markets. The lenders’ IO production increased by 19.9 percent compared with 2011 ... [Includes one data chart]