Investors hit the panic button as Shanghai and Wall Street tumble. In one of the worst trading days in Vietnam’s recent stock market history, the VNI lost 29.37 pts, the second biggest loss since HOSE’s trading band expansion from 5% to 7% in 2013. The market was affected by the widespread negative sentiment from China and a sell-off on Wall Street last Friday. There was a broad-based sell-off among blue chips.