Large banks continue to dominate the business of servicing Fannie Mae and Freddie Mac home loans, but a group of hard-charging non-depository institutions are gaining ground. A new Inside The GSEs analysis of Fannie and Freddie mortgage-backed securities disclosures shows that total single-family MBS outstanding actually declined slightly, by 0.1 percent, during the second quarter. This was due to a 0.3 percent drop in Fannie MBS servicing – the figures do not include servicing of whole loans held by the enterprises – while the Freddie market grew 0.3 percent. Some 46.2 percent of Fannie/Freddie MBS servicing was held by banking organizations with more than $100 billion in assets. That included four of the top five GSE servicers and seven of the top 10.