Who's out: Chairman and CEO Charles Prince stepped down Nov. 4 after losses piled up at the firm.
What's shaking: On Dec. 11, Citi named Vikram Pandit CEO and appointed Win Bischoff as chairman. Wall Street is waiting to see what moves Pandit makes to address Citi's pressing problems.
Cause of concern: Citigroup said it expects a reduction of between $8 billion and $11 billion in the fair value of its exposure to the subprime mortgage market.