The sell orders piled up fast on Monday at Shenwan Hongyuan Group, China’s fifth-biggest brokerage by market value. China’s CSI 300 Index had just tumbled 5 percent, triggering a 15-minute trading halt, and investors were scrambling to exit before getting locked in by a full-day suspension set to take effect at 7 percent. When the first halt was lifted, the market reaction was swift: it took just seven minutes for losses to reach the threshold for a second suspension as volumes surged to their highs of the day. “Investors rushed to the door during the level-one stage of the circuit breaker as they fretted the market ... (full story)