A股早评：三大指数小幅低开，英伟达概念股盘初活跃

Core Viewpoint - The A-share market opened with slight declines across the three major indices, indicating a cautious market sentiment amid specific sector movements [1] Market Performance - The Shanghai Composite Index fell by 0.19%, closing at 3916.51 points [1] - The Shenzhen Component Index decreased by 0.26% [1] - The ChiNext Index dropped by 0.21% [1] Sector Movements - Nvidia-related stocks showed early activity following Trump's announcement allowing Nvidia to export H200 AI chips to "approved customers" in China [1] - The non-ferrous metals sector opened collectively lower, reflecting broader market trends [1]