Group 1 - A-shares experienced significant activity with 50 stocks hitting the daily limit up and 5 stocks hitting the limit down on October 15 [1] - The innovative drug sector showed strong performance, with companies like Yatai Pharmaceutical and Guangsheng Tang reaching the limit up [1] - The raw material drug sector also gained momentum, highlighted by Sunflower's limit up [1] Group 2 - *ST Dongyi achieved a remarkable 7 consecutive limit up days, while Chengxing Co. and ST Erya recorded 5 consecutive limit up days [1] - Other notable stocks include *ST Hekai with 4 limit up days in 5 days, Bohai Automobile with 3 limit up days in 6 days, and several others with multiple consecutive limit ups [1] - On the downside, *ST Yuancheng faced 3 consecutive limit down days, along with Ru Yi Group and Zhichun Technology also hitting the limit down [2]