When origination volume begins growing rapidly, as it appears to have in the second quarter, lenders often ramp up their third-party origination platforms rather than beef up their retail production capacity. According to a new Inside Mortgage Trends analysis of agency mortgage-backed securities data, Fannie Mae, Freddie Mac and Ginnie Mae securitized $156.23 billion of TPO loans during the second quarter, a 32.2 percent increase over the previous ... [Includes one data chart]