收评：沪指跌0.33%守住4100点 AI应用、商业航天等板块跌幅居前

Market Overview - The three major indices showed mixed results, with the Shanghai Composite Index briefly falling below 4100 points, while the ChiNext Index rebounded in the afternoon [1][11] - As of the market close, the Shanghai Composite Index was at 4112.60 points, down 0.33%; the Shenzhen Component Index was at 14306.73 points, up 0.41%; and the ChiNext Index was at 3367.92 points, up 0.56% [1][11] Sector Performance - The storage chip sector saw significant gains, with Blue Arrow Electronics hitting the daily limit up of 20%, and Jiangbolong rising nearly 10% [1][11] - The electric grid equipment sector experienced a surge, with Sanbian Technology hitting the daily limit up and Suyuan Electric rising over 4%, reaching a historical high [2][12] - Semiconductor equipment stocks were active, with Xidian Co. also hitting the daily limit up and achieving a historical high [1][11] - The non-ferrous metals sector rose, with Sichuan Gold hitting the daily limit up [1][11] - Conversely, the AI application sector faced a collective decline, with BlueFocus falling over 10% and several other stocks hitting the daily limit down [1][11] Investment Insights - The State Grid Corporation of China is expected to invest 4 trillion yuan during the 14th Five-Year Plan period, a 40% increase compared to the previous plan, aimed at enhancing the new power system's industrial chain [2][16] - TSMC reported a 35% year-on-year increase in net profit for Q4 2025, reaching 505.7 billion TWD, exceeding market expectations [16] - The South-to-North Water Diversion Project has officially launched its water diversion work for 2025-2026, planning to increase water supply by 1.638 billion cubic meters, a historical high [16] Institutional Perspectives - CITIC Securities highlighted the increasing market liquidity, with A-share trading volume surpassing 3 trillion yuan, and noted the accelerated rotation of thematic sectors [8][17] - Zhongtai Securities indicated that the market may exhibit characteristics of a bottom lift and active main lines in the first quarter and beyond, with a focus on technology sectors benefiting from policy support [9][18]