吉大正元今日跌7.67%，成交额22.91亿元，换手率38.73%，盘后龙虎榜数据显示，3家机构专用席位净买入9341.64万元。

Group 1 - The company Jida Zhengyuan experienced a decline of 7.67% in its stock price today [1] - The trading volume reached 2.291 billion yuan, indicating significant market activity [1] - The turnover rate was 38.73%, suggesting a high level of trading relative to the total shares outstanding [1] Group 2 - Three institutional special seats net bought 93.4164 million yuan worth of shares in the after-hours trading [1]