SIASUN(SZ:300024) Zhi Tong Cai Jing·2025-12-29 08:43Market Overview - The Hong Kong stock market opened high but closed lower, with the Hang Seng Index down 0.71% to 25,635.23 points and a total turnover of HKD 224.51 billion [1] - The Hang Seng Tech Index fell 0.3% to 5,483.01 points, while the Hang Seng China Enterprises Index decreased by 0.26% to 8,891.71 points [1] - Huatai Securities noted significant volatility in asset performance this year, leading to a decline in the clarity of investment themes [1] Blue Chip Performance - BYD (01211) led blue-chip stocks, rising 3.74% to HKD 97.1, contributing 20.66 points to the Hang Seng Index [2] - Other notable blue-chip performances included Geely Automobile (00175) up 3.43% and Industrial and Commercial Bank of China (01398) up 1.63% [2] - Sands China (01928) and CK Hutchison Holdings (00001) faced declines of 4.46% and 3.35%, respectively, negatively impacting the index [2] Sector Highlights - The automotive sector saw most stocks rise, with NIO-SW (09866) up 4.89% and Xpeng Motors-W (09868) up 3.88% [3] - The commercial aerospace sector experienced significant gains, with JunDa Co. (002865) surging 21% due to strategic partnerships in space energy applications [4][7] - Robotics stocks showed strong performance, with MicroPort Robotics-B (02252) rising 25.85% following the establishment of a new standards committee for humanoid robots [4] Individual Company News - Youjiao Innovation (02431) saw a 15.45% increase as the first batch of L3 autonomous vehicles began large-scale operation [8] - MGM China (02282) faced a significant drop of 17.14% due to increased brand usage fees expected to reach HKD 1.2 billion in 2026, impacting EBITDA forecasts [11] - JunDa Co. announced a strategic investment in Shangyi Optoelectronics, focusing on perovskite battery technology for space applications [7]