中泰证券今日大宗交易折价成交407.25万股，成交额2398.7万元

Group 1 - The core transaction on January 20 involved Zhongtai Securities executing a block trade of 4.0725 million shares, with a total transaction value of 23.987 million yuan, accounting for 11.61% of the total trading volume for that day [1] - The transaction price was 5.89 yuan, which represents a discount of 10.21% compared to the market closing price of 6.56 yuan [1] Group 2 - The specific details of the trade include a transaction date of January 20, 2016, with Zhongtai Securities as the broker, and the stock code being 600918 [2] - The transaction amount was 23.987 million yuan, with a trading volume of 4.0725 million shares, indicating significant trading activity [2]