Stocks Blog: China, Hong Kong tumble as STAR technology board debutante soars 400 per cent

Li Qiang, left, Shanghai Communist Party boss, and Yi Huiman, chairman of the China Securities Regulatory Commission, bang the gong to open trading on the Star Market at the Shanghai Stock Exchange. Photo: Shanghai Stock Exchange

A Chinese investor uses a mobile phone to check a rare earths company's stock price at a securities brokerage house in Beijing in June. EPA-EFE

Today is a big day in Chinese markets. The new Star technology board begins trading. Photo: Daniel Ren