凌钢股份涨停，机构净卖出1277.21万元，沪股通净卖出149.50万元

Group 1 - Linggang Co., Ltd. (600231) experienced a trading halt today with a daily turnover rate of 4.54% and a transaction amount of 261 million yuan, showing a fluctuation of 10.75% [2] - The stock was listed on the Shanghai Stock Exchange due to a daily price deviation of 9.84%, with institutional net selling amounting to 12.77 million yuan and a net selling of 1.495 million yuan from the Shanghai-Hong Kong Stock Connect [2] - The top five trading departments accounted for a total transaction amount of 87.04 million yuan, with a buying amount of 46.22 million yuan and a selling amount of 40.82 million yuan, resulting in a net buying of 5.40 million yuan [2] Group 2 - In the first quarter, the company reported an operating income of 3.881 billion yuan, a year-on-year decrease of 25.15%, and a net profit of -252 million yuan [3] - The trading data on July 4 shows that the top buying departments included Kaiyuan Securities and Guotai Junan Securities, with buying amounts of 16.07 million yuan and 8.65 million yuan respectively [3] - The top selling department was an institutional specialized seat with a net selling of 12.77 million yuan, while the Shanghai-Hong Kong Stock Connect was the fifth largest buying and second largest selling department, with buying and selling amounts of 6.68 million yuan and 8.17 million yuan respectively [3]