午间涨跌停股分析：53只涨停股、7只跌停股，有机硅概念活跃，晨光新材、宏柏新材涨停

Group 1 - A-shares saw 53 stocks hitting the daily limit up and 7 stocks hitting the limit down during the first half of the trading day on November 27 [1] - The organic silicon concept was active, with Chenguang New Materials and Hongbai New Materials hitting the limit up [1] - The 5.5G concept strengthened, with Tongyu Communication hitting the limit up [1] - HBM concept stocks rose, with Yishitong hitting the limit up [1] Group 2 - Guosheng Technology achieved 9 consecutive limit ups over 14 days, while *ST Wanfang had 6 limit ups over 9 days [1] - Meng Tian Home had 6 limit ups over 7 days, and Xinhua Du achieved 5 consecutive limit ups [1] - Other notable stocks included Jinfu Technology and Guangji Pharmaceutical with 4 consecutive limit ups, and Maoye Commercial and Xinjin Road with 3 consecutive limit ups [1] Group 3 - *ST Dongyi and *ST Yazhen experienced consecutive limit downs for 2 days, while *ST Zhongzhuang and Guofeng New Materials also hit the limit down [2] - The MACD golden cross signal has formed, indicating a positive trend for certain stocks [3]