Yesterday, the trend of pharmaceutical stock Zhongheng Group was abnormal. It collapsed at the opening and finally fell to the limit. By the closing, Zhongheng Group was quoted at 18.27 yuan per share and its trading volume soared 1.75 times over that on last Friday. Data shows that this stock experienced a net capital outflow of 284 million yuan yesterday, ranking first in the two markets in Shanghai, which accounted for 34.28% of the turnover.