2014 was a rough year to be a Russian oil tycoon, but a pretty awesome year to be leading a Chinese ecommerce platform. Jack Ma saw his net worth increase by $18.5 billion in 2014 as the company he founded, Chinese ecommerce giant Alibaba, became the biggest IPO in U.S. history . Meanwhile, Leonid Mikhelson, a Russian energy tycoon, saw more than a third of his wealth evaporate this year at the hand of plummeting global energy prices, a tumbling rubel and geopolitical tensions. That’s according to a ranking compiled and released by Wealth-X, a Singapore-based firm that compiles research on the ultra-wealth Have a ... (full story)