油價低迷，市場環境糟糕，上證指數也在夏天暴跌。

對投資者來說，去年實在不是個好年頭。然而，那些資產凈值10億美元以上的富翁們依舊設法讓2015年這種不穩定的市場行情成為了對他們的有利因素。

關注超級富人的公司Wealth-X針對億萬富翁進行了一項調查，結果顯示，全球凈資產超過10億者的財富總量增長了5.4%，達到7.7萬億美元，這一部分人群的數量也增長了6.4%，達到2,473人。

億萬富翁人數的增加，很大程度上是因為嬰兒潮出生的一代人把他們的財富傳給了繼承人。通過繼承或部分繼承，從而使得凈資產超過10億美元的人數同比增長了29.9%，這是億萬富翁中增長最快的一批人。

不過大部分億萬富翁還是需要企業家之類的職位來維持他們的地位。約有56%的億萬富翁是白手起家，87%的億萬富翁至少有一部分財富來自他們自己。

不過，億萬富翁們現在對于市場更加謹慎，如今，現金占到了他們凈資產的22.2%，這一比例較之去年的19.1%有所提升，也是2010年Wealth-X開始跟蹤這項數據以來的最高值。由于行情不穩，如上證指數在2015年夏天暴跌，億萬富翁似乎正著手把資金撤離股市。

也就是說，比起兩年前，億萬富翁控制的全球財富如今要略少一些。2014年，凈資產10億以上的富翁持有了全球4%的財富，在2015年這一比例為3.9%，這意味著其他經濟階層的財富增長速度要稍微快于這些富豪們。

盡管女性正在初創公司和高管層努力占有一席之地，但男性億萬富翁的比例仍在增加。如今億萬富翁的男女比例為8.4:1，而去年是8.1:1。（財富中文網）

譯者：嚴匡正

Low oil prices, rough market conditions, and the Shanghai Composite’s summer crash.

The past year was hardly kind to investors, yet billionaires as a group—that is, those with a net worth of $1 billion or more—managed to make the volatile market conditions in 2015 work in their favor.

In total, the wealth of the world’s billionaires grew by 5.4% to $7.7 trillion, while the number of billionaires also grew by 6.4% to 2,473, according to a billionaire census by?Wealth-X, a firm that tracks the ultra-wealthy.

That growing number of billionaires was largely boosted by baby boomers passing their wealth on to their heirs. Billionaires who inherited or partially inherited their net worth grew 29.9% year-on-year—the fastest growing segment of all billionaires.

But the large majority of billionaires still require some form of entrepreneurialism to maintain their status. Some 56% of billionaires in 2015 were self-made and 87% made at least some of their fortunes themselves.

Billionaires have grown more cautious about the markets however, with cash accounting for 22.2% of their net worth, up from 19.1% last year and the highest percentage since Wealth-X began tracking the data in 2010. In response to uncertain market conditions such as the crash of the Shanghai Composite in the summer of 2015, it seems likely that billionaires began taking their money off the table.

That said, billionaires control slightly less of the world’s wealth than they did two years ago. While billionaires held about 4% of global wealth in 2014, they held 3.9% in 2015, suggesting that?other economic classes?grew their wealth at a slightly faster pace than billionaires.

Despite efforts to include more women in the startup space and at the executive table, male billionaire over-representation still increased, according to the report. About 8.4 male billionaires exist for every female billionaire today, up from a 8.1:1 ratio a year ago.