【AI算力竞争格局重塑，芯片ETF（159995.SZ）下跌0.91%】

Group 1 - The A-share market experienced a collective decline on December 4, with the Shanghai Composite Index dropping by 0.35% during the session. The sectors showing gains included non-ferrous metals, defense and military industry, and home appliances, while social services and beauty care sectors faced the largest declines [1] - The chip sector remained sluggish, with the chip ETF (159995.SZ) down by 0.91% as of 9:58 AM. Notable declines among component stocks included Zhaoyi Innovation down 2.40%, Cambrian down 2.39%, and Beijing Junzheng down 2.34%. However, some individual stocks like Tuojing Technology and Shengbang Co. saw slight increases of 0.63% and 0.40%, respectively [1] Group 2 - Alphabet, the parent company of Google, has seen its stock price rise strongly for several consecutive days, with a market capitalization nearing $4 trillion, marking a historical high. As of the close on the 24th, Alphabet's market cap was approximately $3.84 trillion, making it the third-largest globally, following Nvidia and Apple [3] - The AI computing market is rapidly diversifying away from reliance on Nvidia GPUs, moving towards infrastructure diversification and embracing AI-specific chips like TPUs. This shift is expected to drive technological upgrades and demand growth across the entire supply chain, including specialized chip design, advanced packaging, high-speed interconnects, and high-bandwidth memory (HBM) [3] - The chip ETF (159995) tracks the National Chip Index, comprising 30 leading companies in the A-share chip industry, covering materials, equipment, design, manufacturing, packaging, and testing. Key companies include SMIC, Cambrian, Changdian Technology, and Northern Huachuang [3]