Core Viewpoint - The South Korean stock market, driven by a surge in semiconductor demand due to artificial intelligence and domestic corporate governance reforms, has seen the KOSPI index rise nearly 50% this year, making it the strongest major market globally [1][4]. Group 1: Market Performance - As of February 25, the total market capitalization of the South Korean stock market reached $3.76 trillion, an increase of approximately $2.23 trillion since the beginning of the year, surpassing France's market capitalization of $3.69 trillion [1]. - On February 26, the KOSPI index rose by 3.67% to close at 6307.32 points, hitting an intraday high of 6313.27 points, reflecting a year-to-date increase of about 46%, compared to a mere 4.5% rise in France's CAC 40 index during the same period [1]. Group 2: Investment Outlook - Goldman Sachs reported on February 14 that the MSCI Korea index, priced in USD, is leading the Asia-Pacific market. They raised the KOSPI's target price for the next 12 months to 6400 points, indicating that the strong performance of Korean stocks is not yet at its peak [4][6]. - The upward revision is based on the robust recovery of corporate earnings, primarily driven by the expansion of capital expenditures by global tech giants, leading to a tightening supply of memory chips [4][5]. Group 3: Semiconductor Industry Dynamics - The core driver of the recent surge in the South Korean stock market is the structural supply-demand imbalance in the semiconductor industry. SK Hynix's stock has increased approximately sixfold since early 2025, while Samsung Electronics' stock has nearly quadrupled [5]. - The capital expenditure for U.S. cloud computing and hyperscale data centers is expected to reach $666 billion by 2026, significantly up from the initial estimate of $548 billion, while the supply of memory chips is not keeping pace with demand, creating record supply shortages for DRAM and NAND [5]. Group 4: Earnings Growth and Valuation - Goldman Sachs forecasts a 120% growth in earnings per share for the Korean stock market in 2026, significantly higher than the market consensus of 115%, following a 36% growth in 2025 [6]. - The technology hardware sector is expected to contribute the majority of this earnings growth, while other sectors like finance and automotive will also play a role [6]. - Despite the significant rise in the KOSPI, its forward P/E ratio for 2026 remains around 9 times, indicating a substantial discount compared to the MSCI global index and MSCI Asia-Pacific (excluding Japan) index [8].

SK海力士与闪迪联手推进高带宽闪存（HBF）全球标准化，旨在填补HBM与SSD间的层级空白。HBF通过堆叠NAND实 现高带宽与大容量平衡，专为AI推理优化。双方在OCP框架下成立工作组，计划2027年商业化，其市场规模有望在长期 内超越HBM，成为AI存储架构的关键支撑。 硬·AI 作者 |张雅绮 编辑 | 硬 AI SK海力士与闪迪正式联手推进高带宽闪存（HBF）全球标准化，这一新型存储技术被定位为AI推理时代填 补HBM与SSD之间层级空白的关键解决方案，两家公司的合作标志着下一代存储架构竞争进入实质性布局 阶段。 01 HBF定位 填补HBM与SSD之间的存储层级缺口 HBF的核心价值在于构建一个介于超高速HBM与大容量SSD之间的全新存储层级。在AI推理场景下，随着 AI服务用户规模快速扩张，现有存储架构面临高容量数据处理与功耗效率难以兼顾的结构性矛盾——HBM 带宽卓越但容量有限，SSD容量充裕但读写速度不足。 HBF通过垂直堆叠NAND闪存，在维持高带宽的同时提供约10倍于HBM的存储容量，专为弥合这一差距 而设计。 在系统架构中，HBM负责处理高级别带宽需求，HBF作为支撑层承接容量扩展任务， ...

Group 1 - The South Korean stock market continues to rise, with the KOSPI index increasing by 3.67% to 6307.32 points, reaching an intraday high of 6313.27 points [1] - The KOSPI index has surged by 49.69% this year and over 160% since 2025 [1] - Major semiconductor companies, Samsung Electronics and SK Hynix, saw significant stock price increases, with Samsung up over 7% and SK Hynix nearly 8% [1] Group 2 - SK Hynix's stock price has increased sixfold since the beginning of 2025, while Samsung Electronics' stock price has nearly quadrupled [1] - The South Korean stock market's total market capitalization has risen to $3.76 trillion, an increase of approximately $2.23 trillion since early 2025, surpassing France's $3.69 trillion [4] - The KOSPI index's performance has positioned South Korea as the ninth-largest stock market globally [4] Group 3 - The A-share Korean semiconductor ETF (513310) has risen over 9% for three consecutive days, with a premium rate of 20.36% and a trading volume of 7.123 billion yuan, reflecting a 103.45% increase compared to the previous day [3] - SK Hynix and SanDisk are collaborating to advance global standardization of high-bandwidth flash memory (HBF), aiming for commercialization by 2027 [3] - The HBF technology is designed to optimize AI inference by balancing high bandwidth and large capacity through NAND stacking, potentially surpassing HBM in market size in the long term [3]

Market Performance - The South Korean stock market continued to rise, with the KOSPI index increasing by 3.67% to close at 6307.32 points, reaching an intraday high of 6313.27 points, marking a 49.69% increase this year and over 160% since 2025 [1][2] - The market capitalization of the South Korean stock market reached $3.76 trillion, increasing by approximately $2.23 trillion since the beginning of 2025, surpassing France's $3.69 trillion and making South Korea the ninth largest stock market globally [5] Company Highlights - Major semiconductor companies saw significant gains, with Samsung Electronics rising over 7% and SK Hynix increasing nearly 8%. Since the beginning of 2025, SK Hynix's stock price has surged sixfold, while Samsung Electronics' stock price has nearly quadrupled [2][3] - Hanmi Semicon, Hyundai Mobis, LG Electronics, and other companies also reported notable stock price increases, with Hanmi Semicon up 28.44%, Hyundai Mobis up 12.67%, and LG Electronics up 10.05% [4] Industry Developments - SK Hynix and SanDisk are collaborating to advance global standardization of High Bandwidth Flash (HBF) memory, aiming to fill the gap between HBM and SSD technologies. This initiative is expected to optimize AI inference and is planned for commercialization by 2027, with a market potential that may surpass HBM in the long term [5] - The South Korean semiconductor ETF (513310) rose over 9%, marking a three-day consecutive increase with a premium rate of 20.36% and a trading volume of 7.123 billion yuan, reflecting a significant increase in trading activity [4]

Market Performance - The South Korean stock market continued to rise, with the KOSPI index increasing by 3.67% to close at 6307.32 points, reaching an intraday high of 6313.27 points, marking a 49.69% increase this year and over 160% since 2025 [2] - The market capitalization of the South Korean stock market reached $3.76 trillion, increasing by approximately $2.23 trillion since the beginning of 2025, surpassing France's $3.69 trillion and making South Korea the ninth largest stock market globally [6] Company Highlights - Major semiconductor companies saw significant gains, with Samsung Electronics rising over 7% and SK Hynix increasing nearly 8%. Since the beginning of 2025, SK Hynix's stock price has surged sixfold, while Samsung Electronics' stock price has nearly quadrupled [4] - The A-share Korean semiconductor ETF (513310) rose over 9% for three consecutive days, with a premium rate of 20.36% and a trading volume of 7.123 billion yuan, reflecting a 103.45% increase compared to the previous day [6] Industry Developments - SK Hynix and SanDisk are collaborating to advance global standardization of High Bandwidth Flash (HBF) memory, aiming to bridge the gap between HBM and SSD technologies. This initiative is expected to optimize AI inference and is planned for commercialization by 2027, with a market potential that may surpass HBM in the long term [6]

Core Insights - SK Hynix and SanDisk are collaborating to advance the global standardization of High Bandwidth Flash (HBF), positioned as a key solution to bridge the gap between HBM and SSD in the AI inference era [1] - The establishment of a dedicated working group under the Open Compute Project (OCP) framework marks a significant step in the competitive landscape of next-generation storage architecture [1][3] Group 1: HBF Technology Overview - HBF is designed to fill the storage hierarchy gap between ultra-fast HBM and high-capacity SSD, addressing the structural contradictions in existing storage architectures for AI services [2] - HBF offers approximately 10 times the storage capacity of HBM while maintaining high bandwidth, making it suitable for AI inference workloads [2] - The technology is expected to enhance the scalability of AI systems and potentially lower total cost of ownership (TCO) [2] Group 2: Industry Collaboration and Standardization - The collaboration between SK Hynix and SanDisk is based on their expertise in HBM and NAND design, packaging, and mass production [3] - The OCP serves as a widely recognized platform for advancing HBF standardization, transitioning from bilateral agreements to broader industry collaboration [3] - The goal is to launch HBF products by 2027, with the potential for HBF to become an industry standard that supports the growth of the AI ecosystem [3] Group 3: Market Outlook - Demand for HBF solutions is expected to accelerate around 2030, with long-term market potential projected to surpass that of HBM by approximately 2038 [4][5] - The commercialization cycle for HBF is anticipated to be shorter than that of HBM, driven by the growing AI workload and the shift from training to inference phases [4] - Companies that can provide both HBM and HBF solutions are likely to gain strategic advantages in the emerging market expected to see significant demand growth [5]

Summary of Conference Call Notes Company and Industry Involved - **Company**: SNDK (SanDisk) - **Industry**: High Bandwidth Flash (HBF) and Memory Sector Core Points and Arguments - **High Bandwidth Flash (HBF) Research**: The ongoing research into HBF is a key reason for the positive outlook on SNDK, supported by long-term and cyclical tailwinds from data center spending, as well as structural tailwinds from Engram and NVDA's Bluefield and HBF [1][1] - **Comparison with Competitors**: Acknowledgment that Kioxia has a higher exposure in the data center and enterprise market compared to SNDK, and awareness of potential supply from China coming online [1][1] - **Investment Potential**: The less crowded nature of SNDK compared to competitors like Micron or SK Hynix presents a significant upside potential, especially with the shift from enterprise to data center revenue [2][2] - **HBF Architecture**: HBF is described as a new memory tier that positions NAND flash physically closer to GPUs, akin to how HBM positions DRAM near GPUs. The architecture involves stacking 16 NAND chips, each with 128-256 layers, on a custom base chip, providing a capacity of 512GB per HBF stack [2][2] - **SNDK's Leadership in HBF**: SNDK is positioned as a pioneer in HBF technology, with expectations that HBF1 will be realized by 2027, and the first AI inference devices with HBF samples will be available in early 2027 [3][3] - **Collaboration for HBF Development**: The need for strong collaboration in the supply chain is emphasized, particularly with SNDK's long-term agreement with Phison to advance KV caching, which aligns with the development of HBF [3][3] - **Profitability Outlook**: HBF is expected to bring lower commoditization and higher profit margins, similar to HBM, adding new dimensions to demand [3][3] - **Risk-Reward Assessment**: The pessimistic scenario sets a price target of $500 per share (5x earnings of $100), while the optimistic scenario targets $1000 per share (10x earnings), indicating a significant range of potential valuations [4][4] Other Important Content - **Market Dynamics**: The transition narrative from purely cyclical to structural/long-term tailwinds in the memory sector is highlighted as a reason for favoring Samsung as well [2][2] - **Risk Management**: Emphasis on the high difficulty of trading SNDK and the necessity for appropriate risk management strategies [4][4]

Core Viewpoint - The emergence of High Bandwidth Flash (HBF) aims to address the memory bottleneck in artificial intelligence by stacking NAND flash to provide HBM-level bandwidth while achieving a 16-fold capacity increase. However, the practical application of HBF faces significant challenges that may hinder its initial promise [2][30]. Group 1: Background and Challenges - The AI workload bottleneck is no longer computational performance but rather the need for memory to provide data at speeds comparable to NVIDIA's H100, which has a computational capability of 989 TFLOPS. HBM3 meets this requirement with a bandwidth of 819GB/s but has a critical weakness in capacity, with a maximum of 192GB per GPU [5][6]. - The key-value cache (KV cache) for large models like Llama 3.1 405B requires substantial memory, with pre-computed caches needing approximately 540GB for 1 million tokens and 5.4TB for 10 million tokens, making HBM insufficient for such demands [6][11]. - HBF's advantages include a capacity of about 3TB at the same bandwidth of 8TB/s, with NAND costs being approximately one-fifth of HBM, suggesting significant economic benefits [6][8]. Group 2: H³ Architecture and Assumptions - The H³ architecture combines HBM and HBF, acknowledging the limitations of HBF when used alone. It connects HBM directly to the GPU for maximum bandwidth while linking HBF through a daisy chain [8][9]. - The core assumptions of H³ include that most LLM inference data is read-only, the access pattern is deterministic, and a 40MB SRAM buffer can effectively hide the latency of HBF [9][10]. - Simulation results indicate that under ideal conditions, H³ can achieve a throughput increase of 1.25 times for 1 million tokens and 6.14 times for 10 million tokens compared to HBM alone, with a maximum power efficiency improvement of 2.69 times [10][11]. Group 3: Limitations of Assumptions - The assumption that model weights and shared KV caches are read-only is limited in practical LLM services, where frequent updates and model version control are common [11][12]. - The physical limitations of NAND flash, with access delays significantly higher than DRAM, present a fundamental challenge that cannot be overcome by architectural design alone [13][30]. - The cost structure of HBF is complicated by the need for additional components like SRAM and DRAM, which increases the overall system cost despite the lower price of NAND chips [15][16]. Group 4: Alternative Solutions and Market Dynamics - HBF is set to undergo sample testing in 2026-2027, while alternative technologies like HBM4 and CXL memory are rapidly maturing, offering different approaches to memory capacity expansion [20][23][24]. - HBM4 is expected to provide a bandwidth of 1.5TB/s and capacities of 32-48GB, potentially diminishing HBF's capacity advantage [23]. - CXL memory allows for scalable memory pooling across multiple servers, offering significant flexibility and resource utilization improvements, with major industry players already beginning production [24][26]. Group 5: Strategic Importance of HBF - Despite the challenges, HBF represents a strategic shift in the memory industry from commodity supply to platform-based solutions, allowing for greater collaboration with customers and the potential for higher profit margins [28][29]. - The collaboration between SK Hynix and SanDisk in developing HBF technology is a strategic move to explore the integration of storage technologies and platform solutions beyond single product success [29].

Core Viewpoint - The next-generation NAND flash product, High Bandwidth Flash (HBF), is expected to surpass the High Bandwidth Memory (HBM) market within approximately 10 years, driven by the increasing data demands of artificial intelligence applications [1][3]. Group 1: HBF and HBM Overview - HBF significantly enhances memory capacity through vertical stacking of NAND flash, serving as long-term storage, while HBM is crucial for speed [1][2]. - HBF is predicted to play a vital role in AI applications, taking over the "key-value" cache function previously held by HBM as the demand for data storage grows [1][2]. Group 2: Market Predictions and Trends - Professor Kim predicts that from 2038 onwards, the demand for HBF will exceed that of HBM, particularly as memory-centric computing architectures become prevalent [3][8]. - The HBF market is projected to grow from $1 billion in 2027 to $12 billion by 2030, indicating a significant opportunity for companies involved in this technology [7]. Group 3: Competitive Landscape - Samsung and SK Hynix are both developing HBF, but with differing strategies; SK Hynix focuses on HBM while positioning HBF as a complementary solution, whereas Samsung is redefining HBF's role in broader AI memory architectures [5][6]. - Collaboration with major tech companies like NVIDIA, Google, and AMD is deemed essential for market capture and technological advancement in HBF [4][9]. Group 4: Technical Specifications and Advantages - HBF is expected to achieve processing capabilities up to 10 times greater than current solutions at a lower cost, with a speed of 80% to 90% that of HBM and a capacity 8 to 16 times greater [5][6]. - The first generation of HBF is anticipated to stack 16 layers of 32GB NAND flash, totaling around 512GB [6].

Core Viewpoint - SanDisk's stock price has surged over 1500% year-on-year, driven by record profits and strong demand from AI and data center markets [2][4] Financial Performance - SanDisk reported a record profit of $803 million, a 7.7-fold increase year-on-year [2] - Revenue for Q2 FY2026 reached $3.03 billion, exceeding the high-end forecast of $2.65 billion [3] - GAAP profit increased by 672% to $804 million, with profit margins at 26.6% [3][4] - Gross margin improved to 51.1%, up from 29.8% in the previous quarter [7] Market Segments - Revenue from data centers grew by 76%, driven by AI infrastructure demand [12] - Edge computing revenue increased by 63.2%, while consumer market revenue rose by 51.7% [12] - SanDisk's data center business is expected to become the largest market for NAND flash by 2026 [13] Strategic Developments - SanDisk extended its joint venture agreement with Kioxia until December 31, 2034, with a payment of $1.165 billion for manufacturing services [13] - The company is focusing on long-term supply agreements with major clients to enhance planning and returns [10] - SanDisk is developing high-bandwidth flash (HBF) technology and has made progress with its BiCS8 QLC storage products [13] Future Outlook - The company anticipates significant growth in its data center business in both the short and long term [11] - SanDisk expects Q3 revenue to be around $4.6 billion, a 171% increase year-on-year [14]