Citigroup Inc. (NYSE: C) announced today significant declines since September 30, 2007 in the fair value of the approximately $55 billion in U.S. sub-prime related direct exposures in its Securities and Banking (S&B;) business. Citi estimates that, at the present time, the reduction in revenues attributable to these declines ranges from approximately $8 billion to $11 billion (representing a decline of approximately $5 billion to $7 billion in net income on an after-tax basis). These declines in the fair value of Citi's sub-prime related direct exposures followed a series of rating agency downgrades of sub-prime U.S. mortgage related assets and other market developments, which occurred after the end of the third quarter. The impact on Citi's financial results for the fourth quarter from changes in the fair value of these exposures will depend on future market developments and could differ materially from the range above.