Fannie Mae and Freddie Mac produced $73.23 billion of single-family mortgage-backed securities in May, a solid 6.3 percent increase from April, according to a new ranking and analysis by Inside The GSEs. The key ingredient was a 13.0 percent jump in the volume of purchase mortgages delivered by lenders last month. The GSEs securitized $33.25 billion of purchase-money mortgages in May, the strongest monthly total since October 2015 ... [Includes two data charts]