China stocks suffered another round of heavy losses on Tuesday, renewing concerns over government efforts to support markets. The Shanghai Composite shed 3.5% on Tuesday, bringing losses for the week to 6%. Declines have been even steeper on the smaller Shenzhen Composite, which has lost more than 11% over the past two trading sessions. Late in the day, China's government announced a shakeup at the country's stock market regulator. Zhuang Xinyi, a vice chairman at China Securities Regulatory Commission (CSRC), has been removed from his post. His successor, Li Chao, most recently worked for China's State ... (full story)