Stock Learning

The richest people in the world have gotten poorer, just like the rest of us. This year the world's billionaires have an average net worth of $3 billion, down 23% in 12 months. The world has 793, down from 1,125 a year ago.

After slipping in recent years, the U.S. is regaining its dominance as a repository of wealth. Americans account for 44% of the money and 45% of the list's slots, up seven and three percentage points from last year, respectively. Bill Gates lost $18 billion but regained his title as the world's richest man. Warren Buffett, last year's No. 1, saw his fortune decline $25 billion as shares of Berkshire Hathaway fell nearly 50% in 12 months. Mexican telecom titan Carlos Slim Helu maintains his spot in the top three but lost $25 billion.

While 656 moguls lost money in the past year, 44 added to their fortunes. Those who made money did so by catering to budget-conscious consumers (discount retailer Uniqlo's Tadashi Yanai), predicting the crash (investor John Paulson) or cashing out in the nick of time (Cirque du Soleil's Guy Laliberte). Another 38 joined our rankings for the first time, and three former billionaires returned to the list.

Top 25 Billionaires: