On Tuesday, hashtags about mainland China's stock market — including the apt #A-shares rollercoaster — rushed to the top of Weibo's trending list. A-shares are stocks of Chine

In September, Beijing unveiled a raft of monetary stimulus packages, including forced interest rate cuts and lower down payments of homebuyers to boost the economy. Later, the southern city of Guangzhou lifted all home purchase restrictions, while both Shanghai and Shenzhen revealed plans to ease key buying curbs.

Shares in mainland China plunged as traders expressed their disappointment with the lack of new stimulus. The U.S. government's possible attempt to break up Google weighed on tech.