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、西藏旅游、南方路机等严重异常波动股票进行重点监控

Group 1 - The Shanghai Stock Exchange has taken regulatory measures against 270 cases of abnormal trading behaviors, including price manipulation and false declarations [1] - Specific stocks such as *ST Yazhen, Xiwai New Materials, Tibet Tourism, and Southern Road Machinery are under close monitoring due to significant abnormal price fluctuations [1] - The exchange has conducted special investigations into 18 major corporate events and reported 2 suspected illegal cases to the China Securities Regulatory Commission [1]