US rate on 30-year mortgage hits record 3.84 pct.

A sale sign stands sentry outside an unsold new, single-family home. (David Zalubowski)

May 3, 2012 9:10:44 AM PDT
Average U.S. rates for 30-year and 15-year fixed mortgages fell to fresh record lows this week, offering more incentive for Americans to buy or refinance homes.