突发！全线下跌！

Market Overview - The A-share market experienced a significant decline, with the Shanghai Composite Index dropping over 1% and closing below 3600 points, while the total trading volume approached 2 trillion yuan [1][2] - The Shenzhen Component Index and the ChiNext Index fell nearly 2%, indicating a broad market weakness with approximately 4300 stocks declining [2] Sector Performance - Resource sectors such as coal, steel, oil, and non-ferrous metals collectively retreated, while brokerage, insurance, liquor, and banking sectors also saw declines [2] - Conversely, the information security sector surged, with stocks like Digital Certification and Nanjing Xinxing hitting the daily limit, and several others rising over 8% [2][4] Information Security Sector - The information security concept saw strong performance, with stocks like *ST Guandao and Digital Certification reaching their daily limit of 30% and 20% respectively [4][6] - The recent announcement from the National Internet Information Office regarding security issues with NVIDIA's computing chips has heightened interest in this sector [6] AI Industry Chain - Stocks related to the AI industry chain, including liquid cooling servers and CPO concepts, experienced significant gains, with Fangsheng Co. rising over 15% and several others hitting the daily limit [8][9] - The domestic AI model performance is now comparable to leading overseas models, with advancements in AI chip manufacturing by companies like Huawei and Haiguang Information [10] Assisted Reproductive Technology Sector - The assisted reproductive technology sector saw explosive growth, with companies like Anke Bio and Gongtong Pharmaceutical reaching their daily limit of 20% [12][14] - The recent implementation of a childcare subsidy policy is expected to stimulate consumption in maternal and infant-related industries, benefiting sectors such as assisted reproduction and genetic testing [15]