The 20 richest people on Earth lost a combined $11.3 billion yesterday as global markets fell after European economic growth slowed and investors weighed Greece’s chances of getting bondholders to accept a debt swap. Warren Buffett’s fortune fell $407.3 million, dropping his net worth to $43.9 billion. The chairman of Omaha, Nebraska- based Berkshire Hathaway Inc. (BRK/B), his investment holding company, ranks third on the Bloomberg Billionaires Index, a daily ranking of the world’s richest people. “Warren Buffett has no reason to worry and neither does Carlos Slim,” Jeffrey Saut, chief investment strategist at ... (full story)