As the Federal Housing Finance Agency prepares a new guaranty fee framework to unveil in early 2015, a report issued by the FHFA last week noted that big g-fee increases in 2013 were not spread evenly across the market. According to the FHFA’s sixth annual study, average mortgage-backed security g-fees charged by Fannie Mae and Freddie Mac jumped from 36 basis points in 2012 to 51 bps last year.