News Summary: Investment bank helps Citi results

News Summary: Citi's earnings rise as investment bank jumps, fewer reserves for bad loans

BY THE NUMBERS: Citigroup, the third-biggest U.S. bank by assets, reported gains in earnings and revenue on Monday, beating analysts' expectations.

WHERE IT CAME FROM: Citi was able to free up some of the money it had set aside for bad loans. Its own borrowing costs were lowered as it retired debt. Its loss was smaller at Citi Holdings, the unit where it has quarantined problem assets.

AN ASSIST FROM THE INVESTMENT BANK: Investment banking revenue jumped 31 percent, even as revenue from consumer banking held steady. The bank advised more companies on mergers and acquisitions and underwrote more stock and bond offerings.