A股收评：三大指数集体下跌，沪指跌0.55%，深证成指、创业板指跌逾1%科创50跌逾2%，乳业、保险股走高！超2900股下跌，成交1.79万亿缩量3246亿

Market Overview - The three major A-share indices collectively declined, with the Shanghai Composite Index falling by 0.55% to 3867.92 points, the Shenzhen Component Index down by 1.1%, and the ChiNext Index decreasing by 1.77% [1][2] - The total market turnover was 1.79 trillion yuan, a decrease of 324.6 billion yuan compared to the previous trading day, with over 2900 stocks declining [1] Sector Performance - The insurance sector showed strength, with China Ping An (601318) rising nearly 5% [3] - The dairy industry stocks surged, with companies like Huangshi Group (002329) and Sunshine Dairy reaching their daily limit [3] - The commercial retail sector also saw gains, with Dongbai Group (600693) hitting the daily limit [3] - The steel sector became active following the release of new export license policies, with Fushun Special Steel and Taiyuan Iron & Steel (000825) both reaching their daily limit [3] Declining Sectors - The CPO concept faced a significant drop, with Yue Ling Co. (002725) hitting the daily limit down [3] - The shipbuilding sector declined, with Jianglong Shipbuilding (300589) falling nearly 9% [3] - The laser radar sector weakened, with Shijia Photon dropping over 10% [3] - Other sectors such as AI mobile phones, recombinant proteins, automotive chips, and cultivated diamonds also experienced notable declines [3]