After six months as the reigning "World's Richest Billionaire," Warren Buffett has lost his title, and a few billion dollars.
The Forbes 400 list of the richest Americans has just been released, and Buffett's friend Bill Gates, the former Microsoft Chairman, is at the top of the rankings, with an estimated net worth of $57 billion.
That tops Buffett's $50 billion, although he's still number two out of 400 on the Forbes list of the nation's super-rich.
The magazine notes that Berkshire Hathaway shares are down 15 percent since Buffett was named the world's richest billionaire six months ago with an estimated $62 billion. They had soared to an all-time high late last year, lifting him into first place.