理工导航龙虎榜：营业部净买入3885.82万元

Group 1 - The stock of Rigol Navigation (688282) closed at 55.13 yuan on November 28, with an increase of 15.82%, a turnover rate of 3.21%, and an amplitude of 19.91%, resulting in a transaction volume of 147 million yuan [2] - The stock was listed on the daily trading list due to its closing price increase of 15% [2] - The top five trading departments accounted for a total transaction of 74.89 million yuan, with a net buying amount of 38.86 million yuan [2] Group 2 - The main buying departments included two institutional special seats, with buying amounts of 35.75 million yuan and 4.85 million yuan respectively, totaling 16.27 million yuan [3] - The leading selling department was CITIC Securities Co., Ltd. Hangzhou Fuchun Road Securities Business Department, with a selling amount of 7.24 million yuan [3] - Overall, institutional special seats had a net buying of 40.61 million yuan for the stock [2][3]