The supply of single-family mortgage-backed securities issued by Fannie Mae, Freddie Mac and Ginnie Mae grew by 0.5 percent during the second quarter, according to an exclusive analysis and ranking by Inside Mortgage Finance. Total agency MBS outstanding rose to $6.258 trillion at the end of June, which does not include whole loans held in Fannie and Freddie portfolios or government-insured loans repurchased from Ginnie pools. The market was 4.2 percent bigger than it was at the midway point in 2016. Ginnie continues...[Includes two data tables]