Guoxin Securities·2025-06-28 11:50Group 1 - The communication sector outperformed the market in June 2025, with the communication index rising by 11.97% compared to a 2.12% increase in the CSI 300 index, ranking first among 31 primary industries [1][14]. - The light module and optical device sector showed remarkable performance, increasing by 25.98% [1][23]. - The overall valuation of the communication sector has slightly recovered, with a PE ratio of 21.3x as of June 2025, which is still at a historically low level [18][22]. Group 2 - AI revenue for Broadcom in Q2 2025 grew by 46%, driven by strong demand for AI networks, with total revenue reaching 150 billion yuan, a 20% year-on-year increase [2][28]. - NVIDIA announced plans to establish 20 new AI factories in Europe, aiming for a tenfold increase in AI computing power within two years [2][30]. - Major cloud service providers (CSPs) are accelerating their investment in ASIC chip development to reduce reliance on NVIDIA and AMD, with companies like Google, AWS, Meta, and Microsoft leading the charge [2][43]. Group 3 - Taiwanese server ODM manufacturers reported strong monthly revenue growth, with companies like Hon Hai, Quanta, Wistron, and Inventec showing year-on-year increases of 11.92%, 58.19%, 162.14%, and 17.29% respectively [2][55][66]. - The global Ethernet switch market saw a revenue increase of 32.3% year-on-year in Q1 2025, reaching 11.7 billion USD, driven by demand from data centers [2][67]. - LightCounting predicts a 10% quarter-on-quarter growth in optical module sales, primarily driven by the demand for 800G Ethernet optical modules [2][72]. Group 4 - The investment recommendation focuses on sectors benefiting from global AI development, particularly light modules and copper connection industries, as well as domestic computing power companies [3][4]. - The three major telecom operators in China showed stable operations, with a cumulative revenue of 748.8 billion yuan in the first five months of 2025, reflecting a 1.4% year-on-year growth [3][20]. - The recommended stock portfolio includes China Mobile, Zhongji Xuchuang, Huagong Technology, and Guanghetong [4].