午间涨跌停股分析：38只涨停股、7只跌停股，煤炭概念活跃，安泰集团2连板

Group 1 - A-shares saw a total of 38 stocks hitting the daily limit up and 7 stocks hitting the limit down during the first half of the trading day on December 3 [1] - The coal sector was particularly active, with Antai Group achieving two consecutive limit up days, and both Dayou Energy and New Dazhou A hitting the limit up [1] - Notable stocks with consecutive limit up days include Haiwang Biological and Haixin Food with six consecutive days, and Daoming Optical with five consecutive days [1] Group 2 - Stocks such as *ST Lifang and *ST Wanfang experienced two consecutive limit down days, while ST Zhongdi and Ruima Precision also hit the limit down [2]