China's index curb adds to investor worries

Foreign fund managers, already alarmed by restrictions imposed on China’s stock market by the government, can add a new reason not to put their money into the country: regulators are introducing an index circuit breaker. Stocks in China are already subject to automatic trading freezes if they move by 10% in a single trading session. Those limits didn’t prevent the CSI 300 Index from suffering a 37% fall in value this year since reaching its 8 June peak of 5,353 points. Now autho…