午间涨跌停股分析：53只涨停股、6只跌停股，金融科技概念活跃，御银股份3连板，京北方、翠微股份等涨停

Group 1 - A-shares experienced significant market activity with 53 stocks hitting the daily limit up and 6 stocks hitting the limit down on August 21 [1] - The financial technology sector showed strong performance, with companies like Yuyin Co. achieving three consecutive limit ups, and others like Jingbeifang and Cuiwei Co. also hitting the limit up [1] - The digital currency concept gained momentum, highlighted by Zhongyou Capital achieving two limit ups in three days, along with Tianrongxin and Jinshi Technology also reaching the limit up [1] Group 2 - Several stocks demonstrated notable consecutive limit up performances, including *ST Yazhen with 6 limit ups in 7 days, ST Erya with 5 limit ups in 6 days, and Kosen Technology with 5 consecutive limit ups [1] - Conversely, *ST Gaohong faced a continuous decline with 9 consecutive limit downs, while *ST Nanzhi experienced 3 consecutive limit downs [1] - Other stocks like Tenglong Co. and Chongda Technology also faced limit downs, indicating a mixed market sentiment [1]