上交所：本周对*ST亚振等异常波动风险警示股票 及上纬新材等严重异常波动股票进行重点监控

Group 1 - The Shanghai Stock Exchange has implemented regulatory measures such as written warnings and trading suspensions for 181 cases of abnormal trading behaviors, including price manipulation and false declarations [1] - Stocks under risk warning for abnormal fluctuations include *ST Yazhen and stocks with severe abnormal fluctuations like Shuangwei New Materials are under key monitoring [1] - Special investigations are being conducted on 23 major events related to listed companies [1]