Mortgage activity increased 6.9 percent in the week. The trade group's Refinancing Index also rose, jumping 13.5 percent from the previous week.
Interest rates for 30-year, fixed-rate conforming mortgages fell from 4.43 percent to to 4.36 percent with average points unchanged at 0.36.
Rates for 15-year, fixed-rate contracts fell from 3.37 percent to 3.33 percent. Points for 15-year loans rose from 0.37 to 0.41.