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Warren Buffett plowed $3 billion into General Electric at the height of the financial crisis. The investor received $3 billion in preferred stock paying a 10% dividend, plus stock warrants. Berkshire Hathaway made about a $1.5 billion profit. Buffett later said he could have made more.Warren Buffett piled $3 billion into General Electric in October 2008, handing vital cash to the industrial titan just as credit markets seized up and global demand slumped. Here's a...