Mortgage rates recently dropped in response to global uncertainty, helping to keep buyer activity strong toward the close of the homebuying season, according to Freddie Mac’s Primary Mortgage Market Survey® (PMMS®). The results of the survey found the 30-year fixed-rate mortgage (FRM) averaging 4.04 percent, and the 15-year FRM averaging 3.20 percent. The 5-year Treasury-indexed hybrid adjustable-rate mortgage (ARM) averaged …