Mortgage lenders delivered a hefty $303.9 billion in single-family home loans to Fannie Mae and Freddie Mac securitization programs during the first quarter of 2012, the biggest flow of new business to the government-sponsored enterprises in over a year, according to a new analysis and ranking by Inside Mortgage Finance. During the first three months of 2012, GSE single-family securitization jumped 16.2 percent from the fourth quarter. It marked the fourth straight quarterly increase in production of Fannie and Freddie mortgage-backed securities after the market troughed...(Includes three data charts)