Jan. 31 (Bloomberg) -- MBIA Inc., the world's largest bond insurer, posted its biggest-ever quarterly loss and is considering new ways to raise capital after a slump in the value of subprime-mortgage securities.
The fourth-quarter net loss was $2.3 billion, or $18.61 a share, raising concern the Armonk, New York-based company will lose its top credit ratings. The loss came a day after FGIC Corp.'s insurance unit became the third company to be stripped of its AAA grade.
