收评：两市午后跳水沪指转跌 保险、银行等板块走低

Market Performance - The Shanghai Composite Index closed at 4126.09 points, down 0.31% with a trading volume of 16,070.41 billion yuan [1] - The Shenzhen Component Index closed at 14,248.60 points, up 0.56% with a trading volume of 23,343.48 billion yuan [1] - The ChiNext Index closed at 3,349.14 points, up 0.82% with a trading volume of 11,515.33 billion yuan [1] Sector Performance - Sectors such as insurance, banking, real estate, liquor, and brokerage experienced declines [1] - Sectors including media, semiconductors, and oil saw gains [1] - Concepts related to AI applications, cloud computing, and computing power were active [1]