Group 1 - The stock of Lude Medical (920278) experienced a decline of 10.97% with a turnover rate of 34.51% and a trading volume of 278 million yuan, indicating significant market activity [2][3] - The net selling amount from brokerage seats totaled 26.1969 million yuan, reflecting a bearish sentiment among investors [2][3] - The top five brokerage seats accounted for a total transaction volume of 62.9289 million yuan, with buying transactions amounting to 18.3660 million yuan and selling transactions reaching 44.5629 million yuan [3] Group 2 - The largest buying brokerage was Guotai Junan Securities Co., Ltd. with a purchase amount of 3.5120 million yuan, while the largest selling brokerage was Guojin Securities Co., Ltd. with a selling amount of 13.9406 million yuan [3] - Detailed trading data shows that multiple brokerage seats participated in both buying and selling, with significant selling pressure observed from various firms [3]