Sou Hu Cai Jing·2025-09-20 04:20Group 1 - The Shanghai Stock Exchange (SSE) took self-regulatory measures against 274 cases of abnormal trading behaviors from September 15 to September 19, 2025, focusing on stocks like Tianpu Co. and Shoukai Co. for significant price fluctuations [1] - The Shenzhen Stock Exchange (SZSE) reported 287 cases of abnormal trading behaviors during the same period, with a focus on "*ST Yushun" and six major company events under investigation [1] - Tianpu Co. experienced a continuous "limit-up" for 13 trading days, with a total increase of 245.20% from August 22 to September 19, despite multiple trading suspensions and risk warnings [1] Group 2 - Shoukai Co. saw a significant drop at the end of trading on September 19, closing at a limit down with a trading volume of 34.97 billion yuan, marking a ten-year high, while its cumulative increase reached 175% [2] - From September 3 to September 19, Shoukai Co. achieved 11 limit-up days out of 12 trading days, with a maximum cumulative increase of 205.68% [2] - "*ST Yushun" recorded four consecutive limit-up days from September 15 to September 19, following a previous suspension due to 22 limit-up days in 25 days [2]