REUTERS

The billionaires lost 3.2% of their total net worth, bringing the combined sum to $3.9 trillion, according to the Bloomberg Billionaires Index.

The biggest decline belonged to Europe's richest person, Amancio Ortega, who lost more than $6 billion, while nine others dropped more than $1 billion, including Bill Gates, Jeff Bezos and Gerald Cavendish Grosvenor, the wealthiest person in the U.K.