In the week ending Thursday, average rates for 30-year contracts dropped from 3.84 percent to 3.83 percent with 0.7 points. Thirty-year mortgage rates averaged 4.63 percent the same week of 2011.
Average rates on 15-year contracts fell from 3.07 percent to 3.05 percent with 0.7 points, also setting a record low.
A year earlier, rates on 15-year contracts stood at 3.82 percent.
Five-year adjustable rate mortgages averaged 2.81 percent in the week with an average 0.5 points, down from 2.85 percent in the previous week.
A year earlier, five-year adjustable rate contracts averaged 3.41 percent.
Average rates on one-year treasury-indexed adjustable mortgages rose from 2.7 percent to 2.73 percent with 0.5 points. A year ago, rates for these loans averaged 3.11 percent.