A sign for a Bank of America office is pictured in Burbank, California August 19, 2011. Warren Buffett will invest $5 billion in Bank of America, stepping in to shore up the company in the same way he helped prop up Goldman Sachs and General Electric during the financial crisis. Bank of America shares rose 12.3 percent on August 25 to $7.85 in early trading, erasing some part of the stock's August losses. The jump also makes the warrants for Bank of America shares that Buffett gets in the deal instantly profitable. Picture taken August 19, 2011. REUTERS/Fred Prouser (UNITED STATES - Tags: BUSINESS)