(CNBC) — Billionaires are holding mountains of cash, offering the latest sign that the ultra-wealthy are nervous about putting more money into today's markets.
According to the new Billionaire Census from Wealth-X and UBS, the world's billionaires are holding an average of $600 million in cash each—greater than the gross domestic product of Dominica. That marks a jump of $60 million from a year ago and translates into billionaires' holding an average of 19 percent of their net worth in cash.
"This increased liquidity signals that many billionaires are keeping their money on the sidelines and waiting for the optimal moment to make further investments," the study said.
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