Warren Buffett's Berkshire Hathaway earned $3.24 billion in the third quarter, up from $1.06 billion for the same period last year. Buffett last week announced that his company would buy a controlling interest in railway firm Burlington Northern Santa Fe for $26 billion, and would take on $8 billion in debt to do so. "If he were still worried about credit markets, he wouldn't be doing this. It does say something for this guy to put that much money on a bet on the U.S. economy," said Jeff Matthews, author of "Pilgrimage to Warren Buffett's Omaha."
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