DOW JONES NEWSWIRES 
 

MBIA Inc. (MBI) swung to a first-quarter profit on $1.64 billion of derivative gains as the bond insurer also saw sharply higher earned premiums.

Shares jumped 14% in after-hours trading to $7.95. The stock through regular trading Monday was up 71% this year.

The industry has been reeling from a foray into insuring mortgage-backed securities, which plummeted along with the housing market and increasing defaults and delinquencies on home loans. Weak consumer sentiment and the contracting U.S. economy have hurt the companies further.

The nation's largest bond insurer posted a profit of $700.6 million, or $3.34 a share, compared with a year-earlier loss of $2.41 billion, or $12.92 a share, as that period included $3.54 billion of derivative losses.

Revenue was $1.92 billion on the derivative gains, compared with negative $2.94 billion a year earlier. Net premiums earned jumped 47% to $228.7 million.

Rival bond insurer Ambac Financial Group Inc. (ABK) on Monday posted a narrowed first-quarter loss on a gain related to derivatives and a year-earlier write-down. Chief Executive David Wallis said the credit environment remains adverse although "perhaps the rate of degradation is slowing."

MBIA has been sued by several banks over its restructuring plan, announced in February, under which it will split its business of guaranteeing U.S. municipal debt into a separate company, isolating it from the riskier activities related to insuring the complex securities at the heart of the financial crisis. Several banks that hold MBIA shares or notes have sued, saying the split amounts to asset stripping and defrauds investors.

MBIA is also suing Merrill Lynch to cancel about half of its $5.7 billion of credit-default swap contracts and said it will seek compensation for payments it made to other counterparties. It said Merrill had a strategy to offload billions of dollars in deteriorating U.S. subprime mortgages by packaging them into collateralized debt obligations or hedging their exposure through swaps guaranteed by insurers like MBIA.

-By Kerry E. Grace, Dow Jones Newswires; 201-938-5089; kerry.grace@dowjones.com