午间涨跌停股分析：57只涨停股、2只跌停股，铁矿石概念活跃，*ST正平5天3板，海南矿业涨停

Group 1 - A-shares saw a total of 57 stocks hitting the daily limit up and 2 stocks hitting the limit down during the first half of the trading day on December 26 [1] - The iron ore sector was notably active, with *ST Zhengping achieving a third consecutive limit up in five days, and Hainan Mining also hitting the limit up [1] - The lithium mining sector showed strength, with Guocheng Mining and Yongxing Materials both reaching the limit up [1] Group 2 - Victory Energy achieved an 11-day consecutive limit up, while Jiamei Packaging had 9 limit ups in 11 days [1] - Other notable stocks include Shenjian Co. with 7 consecutive limit ups, Hainan Development with 5 limit ups in 6 days, and *ST Jianyi with 5 consecutive limit ups [1] - Several stocks experienced multiple consecutive limit ups, including Huazhong Holdings (6 days, 4 limit ups), Jiuding New Materials (4 consecutive limit ups), and Tongyu Communications (5 days, 3 limit ups) [1] Group 3 - ST Bailing faced a continuous decline with 4 consecutive limit downs, and Tianyuan Co. also hit the limit down [2]