More than a fifth of US homeowners owed more than their properties were worth in the fourth quarter as the number of houses and condominiums lost to foreclosure climbed to a record, according to

In the fourth quarter, 21.4% of owners of mortgaged homes were underwater, up from 21% in the previous three months and down from 23% in the second quarter, the Seattle-based real estate data provider said today in a report. More than one in 1,000 homes were repossessed by lenders in December, the highest rate in Zillow data dating back to 2000.