午间涨跌停股分析：50只涨停股、7只跌停股，钛白粉概念活跃，金浦钛业涨停

Group 1 - A-shares experienced significant market activity with 50 stocks hitting the daily limit up and 7 stocks hitting the limit down on November 7 [1] - The titanium dioxide sector was notably active, with Jinpu Titanium Industries reaching the daily limit up [1] - The fluorochemical sector showed strength, highlighted by Shenzhen Xinxing achieving two consecutive limit ups, along with multiple stocks like Duofluoride and Zhongxin Fluorine Materials also hitting the limit up [1] - The organic silicon sector saw gains, with companies such as Hesheng Silicon Industry and Ruitai New Materials reaching the daily limit up [1] Group 2 - ST Zhongdi (rights protection) achieved a remarkable 16 consecutive limit ups, while ST Xuefa recorded 6 consecutive limit ups [1] - Haima Automobile and Hailu Heavy Industry (rights protection) both had strong performances with 5 and 6 limit ups respectively [1] - ST Yuancheng (rights protection) faced a continuous decline with 20 consecutive limit downs, and ST Wanfang (rights protection) had 3 consecutive limit downs [1]