The bank said profit fell 11 percent in the last three months of last year.

Besides making less money on investment banking, the bank lost money because of a quirky accounting rule related to the value of its corporate bonds.

Citi made $1.16 billion, or 38 cents per share, on revenue of $17.2 billion.

The results fell short of the 54 cents per share estimated by analysts surveyed by FactSet, a provider of financial data.

A year earlier, in the fourth quarter of 2010, Citigroup made $1.3 billion on revenue of $18.4 billion.