Average rate on 30-year mortgage down to 3.90 pct.
March 1, 2012 8:39:50 AM PST
WASHINGTON (AP) - March 1, 2012 --
The average rate on the 30-year mortgage edged down this week to hover again above record lows. Cheaper rates have spurred modest improvements in the battered housing market, but not enough to signal a recovery.