Lin
Engineer & Venture Investor, The Fullstack Investor
Memory remains the main AI bottleneck, and the supply-demand gap will keep widening through 2027. New capacity takes years of fabs, advanced stacking, packaging and testing, so supply only starts improving slowly around 2028. That is why Elon Musk is spending hundreds of billions on TeraFab, with memory capacity a main goal. China's CXMT says in its IPO prospectus that its capacity ranks first in China and fourth globally yet falls far short of even domestic demand. x.com
The AI memory supercycle is unstoppable because memory demand is enormous and suppliers have so much pricing power that margins are exploding. Year to date, SanDisk is up 386%, Seagate 158%, Silicon Motion 148%, Western Digital 144%, Marvell 90% and Micron 84%. The cycle spans HBM, NAND, hard drives, equipment from Applied Materials and Lam Research, and controllers from Rambus, Marvell and Silicon Motion. x.com
Prepaid contracts and demand-paced fabs weaken a broad 2028 memory-glut case. SK hynix says over half its 2027-28 capacity is signed with deposits; 'sold out through 2029' includes negotiations. Samsung targets 60-70% contracted capacity. Micron's three projects begin output in 2H28; tooling follows demand. Reuters says CXMT's 20-30%-yield HBM3E may ship this year to export-restricted Chinese buyers, but performs like older HBM3. Commodity DRAM risks 2028-29 oversupply; NAND could ease in 2H27. … Show more
Micron and SK hynix pricing in a memory shortage past 2030 extends the memory-cycle case beyond the Street's 2028 expectation. SK hynix's record quarter adds evidence: per Wall St Engine, revenue rose 328% to $78.9B, operating profit rose 632% to $62.8B, and operating margin hit 80%. Agentic and physical AI could add demand as they roll out. x.com x.com
China's domestic market lets YMTC and CXMT threaten Micron, Samsung Electronics and SK hynix without entering US products. China receives 15-25% of smartphones and PCs and is on a path to at least 20-30% memory share over the next several years; current leaders are much too optimistic. History suggests at least a near-term semiconductor rally even if the AI trade has topped. It likely has not: agentic AI should give the trade room to run into 2027. x.com x.com x.com
Tight memory supply keeps the AI memory supplier trade in bill-of-materials names if it persists. The investor aleabitoreddit reports an SK hynix shortage outlook through 2030 and an operating-margin result near 80%. HBM allocation and average-selling-price guidance are the next tests; Korea has already priced the earnings print, so the next move depends on who locks capacity. x.com
High-bandwidth memory supply may not keep pace with AI demand, supporting the memory makers. Anthropic's S-1 says SK hynix, Samsung and Micron are expanding capacity, but warns that large buyers or competitors could reserve much of the available output. x.com
The memory sector is finished because China's CXMT has advanced a 4F² DRAM architecture that could greatly increase density. Micron, SanDisk and other memory-stock holders will bleed for months; China will lead AI moving forward, and those stocks are already paying the price. x.com
Slow capacity ramps and long-term deals should tighten memory supply next year and support earnings. Fundamentals look stronger than Q1: Micron expects 2027-28 tighter than 2026, with over 75% of FY27 output committed. Samsung, SK hynix and SanDisk also have multi-year deals. AI-trade positioning and sentiment remain risks; CXMT faces US restrictions and qualification barriers in HBM and hyperscaler RDIMM. A midterm/Christmas rally into 2027 remains the prediction. x.com x.com
AI's physical buildout looks set to last to 2030 and beyond because financing, memory supply and hyperscaler spending still point to sustained demand. Nebius has $3.5B in financing, IREN $2.4B at 9% and SPCX $40B for GPU equipment. SK hynix expects shortages through at least 2030 and Samsung says HBM4 is sold out; memory companies are making money with no sign of slowing. Google expects 2027 capex to rise significantly. Pullbacks can happen; be cautious and buy quality. x.com
Buying the DRAM dip looks too risky now because CXMT's ambitious next-generation 4F plan and SK hynix's aggressive production expansion raise supply concerns for memory stocks such as Micron, SK hynix and Samsung. CXMT is unlikely to become a serious competitive threat, but it could still weigh on storage-stock sentiment. x.com x.com
Memory remains structurally scarce because SK hynix says conventional DRAM and HBM are practically sold out through 2029, while customers request roughly twice the HBM volume it can produce. Long-term agreements cover more than half of 2027 and 2028 capacity, and the company expects the supply-demand imbalance to persist through 2030. x.com x.com
