China’s stock market sinks into bear territory as CSI 300 extends 10-week rout

China’s benchmark CSI 300 index has entered bear-market territory, falling 20% from its June peak, as a prolonged selloff in mainland equities deepens.China’s benchmark CSI 300 index has entered bear-market territory, falling 20% from its June peak, as a prolonged selloff in mainland equities deepens.