Trading on the Shanghai and Shenzhen stock exchanges was ended early on Monday after shares fell seven percent, the first time China's new "circuit breaker" intervened to curb market volatility.<br />The drop in the CSI300 index, which covers both bourses, for the first time triggered an automatic early closure under the new system, after an initial 15-minute trading halt failed to stem the declines.<br />The falls followed poor data from official and private surveys of manufacturing in the world's second-largest economy.<br />In addition, measures introduced to curb China's mid-2015 share slump are about to expire.
