Warren Buffett is the only top-10 billionaire to become poorer this year after Berkshire Hathaway missed out on the stock market's rally

• Warren Buffett is the sole member of the world's top 10 billionaires to see his wealth drop this year.
• Berkshire Hathaway stock is trailing the S&P 500's 5% gain and the Nasdaq's 10% jump this month.
• Buffett's company beat the market last year as investors braced for the worst.

Warren Buffett is the only one of the world's 10 wealthiest people to see his fortune shrink this year, as his Berkshire Hathaway conglomerate is left out in the cold by the stock market's latest rally.