Alibaba Group Executive Chairman Jack Ma delivers a keynote speech during the Cross-Straits CEO Summit in Taipei Dec 15, 2014. [Photo/Agencies]

The richest people on Earth got richer in 2014, adding $92 billion to their collective fortune in the face of falling energy prices and geopolitical turmoil.

The net worth of the world's 400 wealthiest billionaires on Dec 29 stood at $4.1 trillion, according to the Bloomberg Billionaires Index, a daily ranking of the world's richest.

The biggest gainer was Jack Ma, the co-founder of Alibaba Group Holding Ltd, China's biggest e-commerce company. Ma, a former English teacher who started the Hangzhou-based company in his apartment in 1999, added $25.1 billion to his fortune, riding a 56 percent surge in the company's shares since its September initial public offering. Ma, 50, briefly passed Li Ka-shing as Asia's richest person.

"I am nothing but happy when young people from China do well," Li, 86, said through his spokeswoman in Hong Kong.

China's 10 richest people have added almost $48 billion combined year-to-date. Following Ma's $25.1 billion gain, technology entrepreneurs Richard Liu of online retailer JD.com Inc and Robin Li of Baidu Inc added a combined $8 billion.

The title of Asia's richest person could be challenged by Wang Jianlin, whose Dalian Wanda Group Co staged an initial public offering of its commercial properties division this month. An IPO for Wanda Cinema Line Co is planned for early 2015. Wang has a net worth of $25.3 billion, gaining $12.8 billion during the year.