Freddie Mac (NYSE:FRE) released the results of its Primary Mortgage Market Survey® (PMMS®) in which the 30-year fixed-rate mortgage (FRM) averaged 4.71 percent with an average 0.7 point for the week ending 5/5/2011, down from last week when it averaged 4.78 percent. The 15-year FRM this week averaged 3.89 percent with an average 0.7 point, down from last week when it averaged 3.97 percent. The 5-year Treasury-indexed hybrid adjustable-rate mortgage (ARM) averaged 3.47 percent this week, with an average 0.6 point, down from last week when it averaged 3.51 percent.