A-share Midday Review | Shanghai Composite Index falls 0.08%, Siasun Robot&Automation triggers a wave of limit-up moves, on-device AI surges

On October 20, the three major A-share indices opened collectively lower and diverged during intraday trading. The Shanghai Composite Index dipped in early trading, briefly turned positive, then fell back into negative territory. The Shenzhen market's growth style was relatively stronger, with the market showing a divergent pattern of "weak Shanghai, strong Shenzhen, active growth, and rapid rotation of hot spots." As of the midday close, the Shanghai Composite Index fell 0.08% to 3,727.75 points, the Shenzhen Component Index rose 0.18% to 11,838.88 points, and the ChiNext Index rose 0.27% to 2,753.81 points; BSE 50 rose 4.11%. More than 3,900 stocks in the entire market rose. Half-day turnover in the Shanghai and Shenzhen markets was 933.5 billion yuan, a decrease of 37.2 billion yuan from the previous trading day. On the capital front, Cailian Press monitoring data showed that in the morning session, main funds recorded net inflows into sectors such as electronics, machinery and equipment, and communications, and net outflows from the power equipment industry, nonferrous metals, and non-bank financials. Among them, the electronics sector saw net inflows exceeding 5.4 billion yuan; among individual stocks, Shenzhen Everwin Precision Technology topped the list with net buying exceeding 500 million yuan, while Contemporary Amperex Technology saw net selling exceeding 800 million yuan. Market Overview On the board, on the upside, sectors such as humanoid Siasun Robot&Automation, on-device AI, and AI comic dramas led gains, while PCB, consumer electronics, automation equipment, reducers, and semiconductors followed with strength; on the downside, coal mining and processing, China Shipbuilding-related stocks, insurance, banking, and complete vehicles ranked among the top decliners. Overall, small and mid-cap stocks were relatively strong, with a clear divergence between the yellow and white lines. Funds concentrated in technology growth directions such as humanoid Siasun Robot&Automation and on-device AI, with hot spots rotating rapidly; heavyweight sectors such as coal and banking pulled back. Agricultural Bank Of China reached an intraday high of 7.54 yuan, approaching its year-to-date high of 7.57 yuan on January 13. The market showed a pattern of structural divergence. Hot Sectors 1. Humanoid Siasun Robot&Automation concept erupts collectively The humanoid Siasun Robot&Automation concept erupted collectively, with more than ten constituent stocks in the sector hitting the limit up. Shenzhen Everwin Precision Technology rose 20CM to the limit up, Shandong Daye posted a third consecutive limit-up, Zhejiang Fulai New Material, Ningbo Donly, and Zhejiang Rongtai Electric Material posted second consecutive limit-ups, and Taier Heavy Industry hit the limit up. Comment: On the news front, on October 19, the State Council Information Office held a press conference. Wei Wei, director of the Department of Science and Technology of the Ministry of Industry and Information Technology, disclosed that in the first half of this year, China's humanoid Siasun Robot&Automation complete machine products exceeded 400 models, with output exceeding 40,000 units, and are expected to exceed 100,000 units for the full year. The "National Humanoid Siasun Robot&Automation Industry Standard System Construction Guide (2026 Edition)" was also released to promote accelerated verification and deployment of related products in more than 300 key scenarios such as warehousing and logistics, catering and retail, and home services. In addition, Nvidia's GTC conference will be held in Berlin from October 20 to 22, focusing on physical AI and Siasun Robot&Automation. 2. On-device AI concept rises rapidly The on-device AI concept rose rapidly, with Bestechnic (Shanghai) Co., Ltd. up 20CM to the limit, and Quectel Wireless Solutions, Sunsea AIoT Technology, MeiG Smart Technology, Beken Corporation, and LONGCHEER hitting the limit up. Comment: On the news front, according to Counterpoint estimates, the penetration rate of generative AI phones in the global market will reach 52% by 2027, with on-device AI shifting from a high-end selling point to a standard factory feature; Gartner data shows that the share of AIPC shipments will jump from 15.6% in 2024 to about 54.7% in 2026, and AIPC is expected to become the norm by 2029. 3. PCB concept rebounds in volatile trading The PCB concept rebounded in volatile trading, with Guangdong Champion, Jiangsu Xiehe Electronic, and Bomin Electronics hitting the limit up. Comment: On the news front, PCB, together with on-device AI and computing power hardware, belongs to the AI hardware industry chain. It followed the strength amid expectations of rising on-device AI penetration and the jump in AIPC shipment share; Cailian Press monitoring data showed that in the morning session, main funds recorded net inflows of more than 5.4 billion yuan into the electronics sector, with funds continuing to flow into the computing power hardware direction. 4. AI comic drama concept rises in volatile trading The AI comic drama concept rose in volatile trading, with Guangdong Guangzhou Daily Media and Qingdao Citymedia Co,. both hitting the limit up. Comment: On the news front, Tencent recently quietly launched the "Green Bubble Short Drama" mini-program embedded in the WeChat ecosystem, positioned around "free good dramas, watch with one tap," directly targeting ByteDance's Hongguo Short Drama, which has nearly 200 million daily active users, sparking widespread industry attention.