Freddie Mac has released the results of its Primary Mortgage Market Survey (PMMS), which shows mortgage rates changing little over the previous week following mixed economic and housing data. The 30-year fixed-rate mortgage (FRM) averaged 4.52 percent with an average 0.7 point for the week ending July 21, 2011, up from last week when it averaged 4.51 percent. Last year at this time, the 30-year FRM averaged 4.56 percent. The 15-year FRM this week averaged 3.66 percent with an average 0.7 point, up from last week when it averaged 3.65 percent. A year ago at this time, the 15-year FRM averaged 4.03 percent. "Mortgage rates were virtually unchanged this week amid mixed economic data reports," said Frank Nothaft, vice president and chief economist for Freddie Mac. "Although both the overall producer price index and consumer price index fell moderately in June on lower energy costs, the core price indexes inched up. In addition, consumer sentiment sank to the lowest reading since March 2009, based on figures from the University of Michigan." The five-year Treasury-indexed hybrid adjustable-rate mortgage (ARM) averaged 3.27 percent this week, with an average 0.5 point, down from last week when it averaged 3.29 percent. A year ago, the 5-year ARM averaged 3.79 percent. The one-year Treasury-indexed ARM averaged 2.97 percent this week with an average 0.5 point, up from last week when it averaged 2.95 percent. At this time last year, the one-year ARM averaged 3.70 percent. "The recent housing data also varied," said Nothaft. "For example, single-family housing starts jumped 9.4 percent in June to the strongest pace since November 2010 and homebuilder confidence rebounded in July. Yet, existing home sales fell 0.8 percent in June and represented the fewest since November 2010."