午间涨跌停股分析：50只涨停股、8只跌停股，存储器概念活跃，时空科技3连板，大为股份4天2板

Group 1 - A-shares experienced significant market activity with 50 stocks hitting the daily limit up and 8 stocks hitting the limit down on October 24 [1] - The memory storage sector showed strong performance, with companies like Shikong Technology achieving a three-day limit up and Dawi Co. achieving two limit ups in four days [1] - Aerospace-related stocks also performed well, with China Satellite and Aerospace Science and Technology both hitting the limit up [1] - AMD-related stocks saw gains, with Shengyi Electronics hitting the limit up [1] Group 2 - ST Yuancheng faced a continuous decline, hitting the limit down for 10 consecutive days [2] - Huajian Group experienced a three-day limit down [2] - Other companies such as Antai Group and ST Nanzhi also faced limit down situations [2]