国有大型银行板块12月25日跌0.63%，农业银行领跌，主力资金净流出7.75亿元

Group 1 - The core viewpoint of the news is that the state-owned large bank sector experienced a decline of 0.63% on December 25, with Agricultural Bank leading the drop [1] - The Shanghai Composite Index closed at 3959.62, up 0.47%, while the Shenzhen Component Index closed at 13531.41, up 0.33% [1] - The trading performance of individual stocks in the state-owned large bank sector showed mixed results, with Agricultural Bank down 0.79% and Industrial and Commercial Bank down 0.63% [1] Group 2 - The net outflow of main funds from the state-owned large bank sector was 775 million yuan, while retail investors saw a net inflow of 515 million yuan [1] - The detailed fund flow data indicates that Construction Bank had a net inflow of 49.54 million yuan from main funds, while Agricultural Bank had a net outflow of 289.7 million yuan [2] - The overall trend shows that retail investors are more active in the state-owned large bank sector, with significant net inflows compared to the outflows from main and speculative funds [2]