A股早评：三大指数大幅低开，创业板指低开4.44%，AI硬件板块大跌

Core Viewpoint - Recent escalation of China-US trade tensions has led to significant declines in A-share indices, with the Shanghai Composite Index opening down 2.49%, the Shenzhen Component down 3.88%, and the ChiNext Index down 4.44% [1] Market Performance - The CPO and liquid cooling server concepts experienced the largest declines, with companies such as Tongfu Microelectronics and Digital China hitting the daily limit down, while others like Shokubai and Luxshare Precision fell over 9% [1] - The humanoid robot sector also opened significantly lower, with Haichang New Materials and Sanhua Intelligent Control dropping over 8% [1] - In contrast, the rare earth permanent magnet sector saw initial gains, with companies like Antai Technology, Baogang Group, and Xinlai Fu reaching the daily limit up, following the Ministry of Commerce's announcement of export controls on rare earth-related items [1]