China's March credit-growth figures should be viewed as a warning sign, Soros said at an Asia Society event in New York on Wednesday. The broadest measure of new credit in the world's second-biggest economy was 2.34 trillion yuan ($362 billion) last month, far exceeding the median forecast of 1.4 trillion yuan in a Bloomberg survey and signaling the government is prioritizing growth over reining in debt.

What's happening in China "eerily resembles what happened during the financial crisis in the U.S. in 2007-08, which was similarly fueled by credit growth," Soros said. "Most of the money that banks are supplying is needed to keep bad debts and loss-making enterprises alive."