午间涨跌停股分析：57只涨停股、3只跌停股，光刻机概念活跃，福晶科技、奥普光电等涨停

Group 1 - A-shares saw significant activity with 57 stocks hitting the daily limit up and 3 stocks hitting the limit down on September 17 [1] - The photolithography machine concept stocks were particularly active, with companies like Fuzhijing Technology and Aopu Optoelectronics reaching the limit up [1] - The diversified financial sector strengthened, highlighted by Jianyuan Trust achieving two consecutive limit up days and COFCO Capital also hitting the limit up [1] Group 2 - ST Gaohong and ST Zhongji experienced four consecutive limit down days, while ST Dongtong faced three consecutive limit down days [2]