MCLEAN, VA--(Marketwired - Dec 4, 2014) - Freddie Mac (OTCQB: FMCC) today released the results of its Primary Mortgage Market Survey® (PMMS®), showing average fixed mortgage rates down from the previous week. At 3.89 percent, the average 30-year fixed-rate mortgage is at its lowest level since the week of May 30, 2013.