From Bespoke Investment Group:
China's Shanghai Composite fell 3.65% today on new efforts by the Chinese government to curb the housing market. Not only was today's decline the index's biggest one-day move lower since late 2011, but it also left the index below key technical support at its 50-day moving average. Now the Shanghai finds itself up just 0.19% year to date, and it looks like a nasty head and shoulders pattern has formed as well.