Stocks in the news: Citigroup, Exxon Mobil, Google, Visa

Citigroup Inc. (C) said Monday it is repaying $20 billion in bailout money of the $45 billion it received from the Treasury Department. Citi doesn't need to pay the remaining $25 billion, as the government has converted it into a 34% stake in the bank. Paying back the TARP money would help Citi at least reduce the government's influence over its actions, and give it more control over executive compensation. Citigroup shares dropped about 3.5% ahead of the bell.

Exxon Mobil Corporation (XOM) will acquire XTO Energy Inc. (XTO) in a $31 billion all-stock agreement. The deal will boost Exxon's presence in the natural gas industry at a time of low prices for the commodity. Exxon Mobil shares declined 1.3% in pre-market trading; XTO's soared about 20%.