A股收评：沪指微跌0.07%、创业板跌0.82%，全市场超百股涨停，两市成交额连续四日超2.5万亿

Core Viewpoint - The A-share market experienced a narrow fluctuation with all three major indices closing down, while the commercial aerospace and AI application sectors showed significant strength [1][2][4] Market Performance - The Shanghai Composite Index fell by 0.07% to 4082.98 points, the Shenzhen Component Index decreased by 0.51% to 13959.48 points, and the ChiNext Index dropped by 0.82% to 3302.31 points [1] - The total trading volume in the Shanghai and Shenzhen markets reached 2.8 trillion yuan, marking the fourth consecutive trading day with volumes exceeding 2.5 trillion yuan [1] - Over 3700 stocks rose, with 111 stocks hitting the daily limit up [1] Sector Highlights Commercial Aerospace - The commercial aerospace sector saw a collective surge, with over 20 stocks hitting the daily limit up, including Galaxy Electronics and Shaoyang Hydraulic [2] - The upcoming launch of the "Vesta-1 Sea Launch" commercial rocket by Xinghe Power Aerospace is expected to catalyze further growth in this sector [2] Controlled Nuclear Fusion - The controlled nuclear fusion sector continued its strong performance, with multiple stocks, including China Nuclear Engineering and Xue Ren Group, achieving consecutive limit ups [3] - The sector is benefiting from breakthroughs in high-temperature superconductors and AI technology, with significant investment opportunities emerging in the upstream segment [3] AI Computing Chips - The AI computing chip sector showed robust growth, with stocks like Haiguang Information rising over 10% [4] - The Ministry of Industry and Information Technology and other departments issued guidelines to enhance AI computing power supply, supporting the development of key technologies in this area [4] Institutional Insights Citic Securities - Citic Securities suggests a higher probability of upward market movement in 2026, emphasizing the balance between external and internal demand [5] - The firm recommends focusing on sectors with lower heat and higher long-term return on equity potential, such as chemicals, engineering machinery, and new energy [5] Zhongtai Securities - Zhongtai Securities maintains a cautiously optimistic view on the technology sector, advising investment in well-logic-driven sub-sectors [6] - The firm notes potential market volatility due to seasonal tightening of funds, suggesting a window for low-price acquisitions [6] Everbright Securities - Everbright Securities highlights increasing divergence among market participants, indicating a need to be cautious of market volatility risks [7][8] - The firm points to the upcoming AI hardware exhibition in Shenzhen as a potential catalyst for related concepts [8]