午评：沪指半日跌0.16%，化工板块集体爆发

Market Overview - The market opened lower but rebounded, with the three major indices briefly turning positive during the session [1] - The total trading volume in the Shanghai and Shenzhen markets reached 1.25 trillion, a decrease of 71.1 billion compared to the previous trading day [1] - By the close, the Shanghai Composite Index fell by 0.16%, the Shenzhen Component Index also decreased by 0.16%, and the ChiNext Index dropped by 0.37% [1] Sector Performance - The chemical sector showed sustained strength, with companies like Chengxing Co. and Qingshuiyuan among 10 stocks hitting the daily limit [1] - The Hainan sector remained active, with Haima Automobile achieving five consecutive daily limits in six days [1] - The organic silicon sector experienced a collective surge, with Dongyue Silicon Material and Hesheng Silicon Industry hitting the daily limit [1] - Lithium battery concept stocks saw a rapid increase, with Tianji Co. and Shida Shenghua also reaching the daily limit [1] Declining Sectors - The robotics sector faced significant declines, with stocks like Lixing Co. and Zhejiang Rongtai experiencing substantial drops [1] - Among the sectors, chemicals, Hainan, and batteries showed the highest gains, while software development and gaming sectors recorded the largest declines [1]