今日涨跌停股分析：44只涨停股、28只跌停股，贵金属板块活跃，白银有色7天5板

Group 1 - A-shares experienced significant market activity on October 17, with 44 stocks hitting the daily limit up and 28 stocks hitting the limit down [1] - The precious metals sector was notably active, with silver-related stocks achieving five limit ups in seven days [1] - Iron ore concept stocks showed strength, highlighted by Guangdong Mingzhu reaching the limit up [1] Group 2 - ST Ercai faced a continuous decline, recording six limit downs over seven days [2] - Songyang Resources and Tianpu Shares also experienced consecutive limit downs for two days [2] - Other companies such as ST Guohua and ST Yatai also hit the limit down [2]