Fannie Mae and Freddie Mac issued $61.1 billion in single-family mortgage-backed securities during the month of August, a 5.5 percent increase from the previous month, according to a new Inside The GSEs analysis. However, MBS issuance through the first eight months of 2014 was down 56.7 percent from the same period a year ago Top-ranked Wells Fargo’s Fannie and Freddie securitization, at $8.2 billion, rose by 3.1 percent on a monthly basis but dropped 70.0 percent year-to-date.