Chinese stock trading was halted for 15 minutes after the CSI 300 Index fell more than 5 percent. The CSI 300 Index of companies listed in Shanghai and Shenzhen tumbled 5.4 percent before the circuit breaker came into effect. It’s the second time this week the halt has been triggered. Stocks fell after China’s central bank weakened the currency’s daily reference rate by the most since August. Under the mechanism which became effective Monday, a move of 5 percent in the CSI 300 triggers a 15-minute halt for stocks, options and index futures, while a move of 7 percent close the market for the rest of the day. Chinese ... (full story)