午间涨跌停股分析：50只涨停股、6只跌停股，化纤概念活跃，蓝丰生化5连板，神马股份涨停

Group 1 - A-shares experienced significant activity with 50 stocks hitting the daily limit up and 6 stocks hitting the limit down on September 26 [1] - The chemical fiber sector was notably active, with companies like Bluefeng Biochemical achieving a five-day consecutive limit up and Shunma Co. also hitting the limit up [1] - The PTA concept saw strength, exemplified by Sanfangxiang hitting the limit up [1] Group 2 - The plant-based meat sector showed an upward trend, with Jinzi Ham achieving two limit ups in four days [1] - Among the stocks with consecutive limit ups, *ST Zhengping achieved 13 limit ups in 18 days, while Wanxiang Qianchao had 6 limit ups in 10 days [1] - Other notable stocks included Zhejiang Xiantong with 3 limit ups in 5 days, and Yangyuan Beverage and Jingyi Co. both achieving three consecutive limit ups [1] Group 3 - On the downside, *ST Gaohong faced 11 consecutive limit downs, while ST Fuhua experienced 4 consecutive limit downs [1] - Other companies like Huasoft Technology and Hongdou Co. also hit the limit down [1]