2026存储“超级牛市”仍未结束？

Core Viewpoint - The short-selling report by Citron Research on SanDisk highlights concerns over the storage chip market's supply-demand dynamics, suggesting that the current supply tightness is temporary and that SanDisk's valuation is significantly overstated [1] Group 1: Market Dynamics - Citron Research argues that the storage industry is characterized by strong cyclicality, with NAND flash memory prices and profitability heavily influenced by supply-demand cycles [1] - Historical trends show that the storage industry has experienced cycles of "boom—oversupply—collapse," with significant price drops following periods of high demand and subsequent capacity expansions [1] - The report indicates that the current high gross margins of approximately 50% are often indicative of a market peak rather than a sustainable state [1] Group 2: Company-Specific Insights - Citron compares SanDisk to high-growth stocks like Nvidia, asserting that its products are essentially commoditized and lack long-term technological barriers [1] - The report notes that Western Digital, SanDisk's former parent company and a significant shareholder, has recently sold shares at below-market prices, which Citron interprets as an insider prediction of a market peak [1] Group 3: Stock Performance and Market Reaction - Prior to the report, SanDisk's stock was at a high of $666.49, with a cumulative increase of approximately 175% since the beginning of 2026 and over 1200% in the past 12 months [2] - Following the report, SanDisk's stock fell to a low of $612.92, closing at $638.52, reflecting a decline of 4.20% and a significant increase in trading volume to over 30.4 million shares [2] - Despite the initial impact of the short-selling report, SanDisk's stock rebounded close to pre-report levels within two trading days, while competitors like Samsung and SK Hynix reached historical highs [2] Group 4: Industry Outlook - The CEO of SanDisk previously stated that AI-driven demand for high-bandwidth memory and NAND represents a structural change in the storage market, challenging the cyclical view presented by Citron [2] - Citigroup has raised its 2026 forecasts for DRAM and NAND average selling prices, predicting increases of 88% and 74% respectively, indicating a "runaway" market and a severe seller's market due to AI infrastructure investments [2] - For investors in mainland China, the China-Korea semiconductor ETFs have become important tools for exposure to Korean and American semiconductor giants, with a notable single-day increase of nearly 10% and a closing premium rate of 21.1% [2]