AI周观察：光通信赛道维持高景气度，Gemini保持高活跃度

Investment Rating - The report indicates a strong investment outlook for the AI infrastructure sector, particularly highlighting companies like Marvell and Broadcom as having significant growth potential in the upcoming fiscal years [12][19]. Core Insights - The AI application market is experiencing varied activity levels, with Gemini showing an increase despite overall declines due to seasonal factors [10][7]. - Marvell's third-quarter revenue grew by 37%, with data center revenue up 38%, and the company expects over 25% growth in data center revenue for FY27 [12][18]. - Broadcom is anticipated to exceed expectations in its upcoming FY25Q4 earnings report, driven by strong demand for ASICs and AI chips [19][20]. - AWS's introduction of Trainium4 aims to enhance system-level performance and interconnectivity, positioning it as a competitive player in the AI chip market [24][25]. - The Chinese smartphone market saw a 12% year-over-year increase in sales, with Apple leading the market share [26][34]. Summary by Sections AI Application Market - Gemini's activity increased while most other applications saw declines due to overseas holidays [10][7]. - New models and technologies from companies like AWS and Tencent are enhancing capabilities in AI applications [11]. Marvell's Performance - Marvell reported a 37% increase in revenue and a 38% increase in data center revenue, with a positive outlook for the fourth quarter [12][18]. - The company is focusing on AI data center interconnects and custom ASICs, with a clear growth path for FY27-28 [17][18]. Broadcom's Expectations - Broadcom is expected to report "better than expected" results for FY25Q4, with strong demand for AI chips and data center interconnects [19][20]. - The market is adjusting its expectations positively ahead of the earnings report [20]. AWS's Trainium4 - AWS's Trainium4 is set to significantly improve performance and interconnectivity, leveraging NVLink Fusion technology [24][25]. - This shift indicates a strategic move towards a more interconnected and efficient computing environment [25]. Smartphone Market Dynamics - In October 2025, China's smartphone sales reached approximately 29 million units, marking a 12% increase year-over-year [26][34]. - Apple maintained a strong market presence, with its latest models leading in sales [26][33]. PC Market Trends - The domestic PC market saw a decline in sales, with desktop and laptop sales down by approximately 8% and 16% respectively [34].