电子：格局落定，价值归真：从周期波动走向技术溢价

Investment Rating - The report suggests a focus on companies such as SanDisk (SNDK.O), SK Hynix (000660.KS), Samsung Electronics (005930.KS), and Micron Technology (MU.O) due to their potential in the AI-driven storage market [4]. Core Insights - The industry is transitioning from traditional cycles to AI-driven technological premiums and high growth, with storage becoming a critical bottleneck for AI computing efficiency [5]. - AI is driving exponential growth in storage demand, with significant increases in requirements for high-bandwidth memory (HBM) and solid-state drives (SSD) due to the scaling laws of model parameters [5]. - The valuation framework is being reshaped, with revenue growth and net profit margin expansion occurring simultaneously, indicating a period of high operational leverage in the storage sector [5]. Summary by Sections AI Value Chain - The AI value chain includes components such as computing chips (GPUs, CPUs, ASICs), storage (DRAM, SSD, HDD), networking, and energy solutions, highlighting the interconnectedness of these sectors [10][12]. - The storage segment is characterized by oligopolistic features, with high barriers to entry supporting high profitability [12]. Storage Demand and Hardware Architecture - Storage demand is categorized into cold, warm, and hot data, with different storage solutions (HDD, SSD, DRAM) tailored to each category's speed and capacity requirements [20]. - The architecture is structured in layers, with HBM for high-speed access, SSD for intermediate storage, and HDD for large capacity [29]. Large Language Model Storage Requirements - The report details the storage needs of large language models, emphasizing the importance of storage capacity and bandwidth in both training and inference phases [42][47]. - The growth in model parameters necessitates increased storage capacity, with significant implications for the demand for NAND and DRAM technologies [59]. Company-Specific Insights - Micron Technology (MU.O) is focusing on data centers and has made significant advancements in HBM3E technology, with a strong market demand for its products [64][70]. - SanDisk (SNDK.O) has undergone a restructuring, achieving notable revenue growth and improving profit margins through a focus on high-value enterprise SSDs [72][78]. - SK Hynix is benefiting from its early entry into the AI storage market, while Samsung is striving to catch up [79][81].