20cm速递｜创业板人工智能ETF国泰（159388）涨超4.8%，通信业增长与AI算力需求受关注

Group 1 - The core viewpoint is that the global AI investment race among CSPs is accelerating, benefiting the computing power infrastructure and maintaining high prosperity in optical communication, paving the way for AI computing interconnectivity [1] Group 2 - North American optical communication companies reported strong quarterly performance, with Marvell's FY2026Q3 revenue increasing by 37% year-on-year, driven by increased data center demand and operational efficiency improvements, along with the acquisition of Celestial AI to enhance full optical interconnect technology for data centers [1] - Credo's FY2026Q2 revenue grew by 20.2% quarter-on-quarter, reflecting the ongoing expansion of global AI training and inference infrastructure, with ALC potentially becoming a new growth driver [1] - AWS launched the next-generation AI Trainium 4, which supports NVLink Fusion high-speed interconnect technology, enabling interoperability and performance expansion with NVIDIA GPUs [1] Group 3 - The Guotai Junan AI ETF (159388) tracks the ChiNext AI Index (970070), achieving a daily fluctuation of 20%. This index selects listed companies involved in key AI technologies such as machine learning, big data analysis, and cloud computing from the ChiNext market, reflecting the overall performance of AI-related listed companies in the ChiNext market [1] - The index focuses on companies in the AI sector that exhibit high growth and innovation characteristics, effectively representing the development trend of China's ChiNext AI industry [1]