Loss severities on subprime debt, tied to risky mortgages that inflated the housing bubble, increased to 75.9 percent from 74.1 in the last three months of the year. The severities -- a measure of losses suffered on a liquidated loan -- peaked at 77.1 percent in early 2012 from 12.8 percent at the end of 2006, during the property boom.

Keeping Pace

Improvements in loss severities have failed to keep pace with the 24 percent gain in house prices since the 2012 trough. Real-estate values have been recovering for about two years, with prices climbing in October at the fastest pace since 2006, according to a Case-Shiller index of 20 cities.

“You see Case-Shiller price data showing strong markets, and you expect in a certain logical way that these loss severities should be coming down as home values are increasing,” said Gundlach, who started Los Angeles-based DoubleLine Capital in December 2009 and built it into the fastest growing mutual-fund firm ever in its first year. “Unfortunately, that’s being trumped or neutralized by this rotting away problem.”

Investors including Blackstone Group LP and Colony Capital LLC have been central to the rebound, buying more than 366,200 single-family homes in cities such as Phoenix, Las Vegas and Atlanta, since January 2011 to turn into rentals, according to Port Street Realty and RealtyTrac data. Federal Reserve policies that reduced borrowing costs and increased homeowner refinancing also lifted the market.

Improving Economy

While rising prices, and an improving economy have resulted in a steep drop in foreclosures, there are more than 1.2 million properties in the repossession process or owned by banks that the market is absorbing, according to RealtyTrac.

“With the average timeline for foreclosure increasing, these properties are sitting in limbo for a longer period,” said RealtyTrac Vice President Daren Blomquist.

Florida had the highest foreclosure rate last year, with more than 3 percent of households receiving a filing. It’s one of about 20 judicial states including New Jersey, New York and Connecticut, requiring a court review of home repossessions, and lengthening the time it takes to seize a property.

There are about 8 million borrowers still underwater, who owe more on their mortgages than their homes are worth, which increases the probability of default, Deutsche Bank AG wrote in a report this month. Florida and California have the highest concentration, each with more than one million single-family houses in negative equity.