The biggest loser, according to Wealth-X, was Russian energy tycoon Leonid Mikhelson, whose fortune shrank to $10 billion from $17 billion.  Read MoreThe most expensive ... of 2014  Rank #1 - Jack Ma Net Worth in Dec 2013: $10.7 billion Net Worth in Dec 2014: $29.2 billion Gain: $18.5 billion, +173 percent  Rank #2 - Warren Buffett Net Worth in Dec 2013: $59.1 billion Net Worth in Dec 2014: $72.6 billion Gain: $13.5 billion, +23 percent  Read More8 predictions from America's wealthiest for 2015  Rank #3 - Bill Gates Net Worth in Dec 2013: $72.6 billion Net Worth in Dec 2014: $83.1 billion Gain: $10.5 billion, +14 percent  Rank #4 - Mark Zuckerberg Net Worth in Dec 2013: $24.7 billion Net Worth in Dec 2014: $33.1 billion Gain: $8.4 billion, +34 percent  Rank #4 - Patrick Drahi Net Worth in Dec 2013: $7.8 billion Net Worth in Dec 2014: $12.9 billion Gain: $5.1 billion, +65 percent  Rank #1 - Leonid Mikhelson Net Worth in Dec 2013: $17 billion Net Worth in Dec 2014: $10 billion Loss: $7 billion, -41 percent  Read MoreWhat millionaires are buying for the holidays  Rank #2 - Masayoshi Son Net Worth in Dec 2013: $19.1 billion Net Worth in Dec 2014: $13.2 billion Loss: $5.9 billion, -31 percent  Rank #3 - Lui Chee Woo Net Worth in Dec 2013: $19.6 billion Net Worth in Dec 2014: $14.1 billion Loss: $5.5 billion, -28 percent  Read MoreThis $30M yacht is the Batmobile of the ocean  Rank #4 - Jeff Bezos Net Worth in Dec 2013: $34.4 billion Net Worth in Dec 2014: $28.9 billion Loss: $5.5 billion, -16 percent  Rank #5 - Sheldon Adelson Net Worth in Dec 2013: $35.3 billion Net Worth in Dec 2014: $30.1 billion Loss: $5.2 billion, -15 percent
Here's some news that should cheer up Jack Ma from his funk. Of all the billionaires in the world, he had the biggest jump in his fortune this year.