Nearly $320 billion of newly originated home loans were funneled into the MBS market during the second quarter, but that represented just 56.4% of new production in the primary mortgage market.

Issuers and investors in the securities market are divided on what exactly should be done with the qualified mortgage “patch.”

Fannie, Freddie and Ginnie issued a combined $170.7 billion in new single-family MBS in August, their highest monthly volume since November 2012. A big surge of refinance business was a major factor.