北纬科技换手率39.86%，龙虎榜上机构买入2290.25万元，卖出6923.02万元

Group 1 - The stock of Beiwai Technology increased by 6.39% with a turnover rate of 39.86%, and a trading volume of 2.147 billion yuan, showing a fluctuation of 8.26% [2] - Institutional investors net sold 46.32 million yuan, while brokerage seats collectively net bought 14.64 million yuan [2] - The stock has appeared on the Dragon and Tiger list 12 times in the past six months, with an average price increase of 2.52% the day after being listed and an average increase of 8.37% over the following five days [2] Group 2 - As of September 17, the margin trading balance for the stock was 280 million yuan, with a financing balance of 280 million yuan and a securities lending balance of 110 yuan [3] - In the past five days, the financing balance increased by 29.07 million yuan, representing an increase of 11.59%, while the securities lending balance increased by 126 yuan, with a growth rate of 12.40% [3] - The top five buying and selling brokerage seats accounted for a total transaction volume of 400 million yuan, with buying transactions amounting to 184 million yuan and selling transactions amounting to 216 million yuan, resulting in a net sell of 31.69 million yuan [2][4]