Caterpillar subsidiaries under federal investigation  

Reuters: The movement of cash among Caterpillar Inc.’s U.S. and foreign subsidiaries is being investigated by U.S. authorities, the company said in a regulatory filing on Tuesday. The heavy machinery maker said it had received a grand jury subpoena from a U.S. District Court on Jan. 8 and is cooperating with the investigation. The company believes that the investigation would not have a material effect on its financial position.

Buffett picks up Deere, drops Exxon Mobil  

Reuters: Warren Buffett’s Berkshire Hathaway Inc. on Tuesday disclosed a new stake in agricultural and construction equipment maker Deere & Co., one of a handful of changes in its stock holdings during the fourth quarter. Berkshire reported a 17.1 million-share stake, according to a U.S. Securities and Exchange Commission filing that detailed its domestic equity investments as of Dec. 31. The Omaha-based company also dissolved its $3.7 billion stake in energy giant Exxon Mobil Corp. amid the slump in oil prices.

Citigroup doubles commitment to green projects 

Reuters: Citigroup Inc. said it would set aside $100 billion to fund environmental projects over the next decade, doubling the amount it had earmarked for such projects in 2007. Citigroup said it would fund projects related to renewable energy, greenhouse gas reductions and sustainable transportation. The third-largest U.S. bank said it had met its previous investment target three years ahead of schedule in 2013.