Zheng Xing Xing Ye Ri Bao·2025-08-13 08:37Group 1 - The oil and gas extraction sector increased by 0.63% on August 13, with *ST Xinchao leading the gains [1] - The Shanghai Composite Index closed at 3683.46, up 0.48%, while the Shenzhen Component Index closed at 11551.36, up 1.76% [1] - The trading volume and turnover for key stocks in the oil and gas extraction sector were reported, with *ST Xinchao closing at 3.96, up 5.04% [1] Group 2 - The net outflow of main funds in the oil and gas extraction sector was 107 million yuan, while retail investors saw a net inflow of approximately 94.28 million yuan [1] - Detailed fund flow data showed that *ST Xinchao had a main fund net inflow of 29.74 million yuan, but a net outflow from retail investors of 20.80 million yuan [2] - Other stocks like China National Offshore Oil Corporation experienced significant net outflows from main funds, totaling 12.66 million yuan [2]