Fixed mortgage rates remained practically unchanged this week, Freddie Mac reported Jan. 16 in its weekly Primary Mortgage Market Survey.

The 30-year fixed-rate fell 0.02 percentage points this week to 3.38 percent (down from 3.88 percent a year ago). The 15-year fixed-rate remained steady at 2.66 percent (down from 3.17 percent a year ago).

The one-year adjustable-rate mortgage dropped 0.03 percent to 2.57 percent (down from 2.74 percent a year ago). The five-year Treasury-indexed adjustable-rate also stayed flat at 2.67 percent (down from 2.82 percent a year ago).

“Mortgage rates were flat-to-down this week amid reports that inflation remains contained,” Frank Nothaft, Freddie Mac vice president and chief economist, said in a news release. “The overall producer price index rose 0.1 percent between November and December, below the market consensus forecast, and the consumer price index was unchanged. For the year as a whole, consumer prices rose just 1.7 percent in 2012, almost half that of 2011's increase of 3.0 percent."

View Freddie Mac’s weekly Primary Mortgage Market Survey.