Citigroup has announced a net loss for the 2007 fourth quarter of $9.83 billion with the results including a "$18.1 billion in pre-tax write-downs and credit costs on sub-prime related direct exposures in fixed income markets, and a $4.1 billion increase in credit costs in U.S. consumer primarily related to higher current and estimated losses on consumer loans."
Citi said that its "U.S. consumer credit costs increased $4.1 billion, comprised of $689 million in higher net credit losses and a net charge of $3.31 billion to increase loan loss reserves. ... The increase in credit costs primarily reflected a weakening of leading credit indicators, including increased delinquencies on 1st and 2nd mortgages, unsecured personal loans, credit cards, and auto loans."