Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., carries a can of Coca-Cola soda as he arrives for a special shareholders meeting in Omaha, Nebraska, U.S., on Wednesday, Jan. 20, 2010. Buffett, who usually shuns giving investors an opinion on the value of his Berkshire Hathaway Inc., said today the stock is undervalued and that he would have preferred to pay in cash for the $26 billion takeover of Burlington Northern Santa Fe Corp. Photographer: Chris Machian/Bloomberg via Getty Images