A股午评：沪指半日涨0.43% 电网设备板块走高

Core Viewpoint - A-shares showed mixed performance in early trading, with the Shanghai Composite Index rising by 0.43% while the Shenzhen Component and ChiNext indices fell by 0.23% and 0.74% respectively [1] Market Performance - The Shanghai Composite Index increased by 0.43% at midday, while the Shenzhen Component decreased by 0.23% and the ChiNext index fell by 0.74% [1] - The total trading volume in the Shanghai and Shenzhen markets reached 972.3 billion yuan, a decrease of 43.9 billion yuan compared to the previous trading day [1] Sector Performance - The market displayed a scattered and chaotic trend, with more stocks declining than rising [1] - The electric grid equipment sector performed well, with stocks such as Guodian Nanzi and Kelu Electronics hitting the daily limit [1] - The humanoid robot sector experienced a surge, with companies like Aowei New Materials, Zhongdali De, and Dafeng Industrial reaching the daily limit [1] - The diversified financial sector saw a significant pullback, with Nanhua Futures and Dazhihui hitting the daily limit down [1]