Average rates for 30-year contracts dropped from 3.79 percent to 3.78 percent with 0.8 points, a record low. Thirty-year mortgage rates averaged 4.6 percent the same week of 2011.
Average rates on 15-year contracts held at a record low of 3.04 percent with 0.7 points, Freddie Mac said.
A year earlier, rates on 15-year contracts stood at 3.78 percent.
Five-year adjustable rate mortgages averaged 2.83 percent in the week with an average 0.6 points, unchanged in the week and down from an average of 3.41 percent a year earlier.
Average rates on one-year treasury-indexed adjustable mortgages fell from 2.78 percent to 2.75 percent with 0.4 points. A year ago, rates for these loans averaged 3.11 percent.
"Mortgage rates were virtually unchanged this week with fixed-rate loans remaining at record lows and helping to drive homebuyer affordability," commented Freddie Mac Vice President and Chief Economist Frank Nothaft.