The AI infrastructure boom has fuelled an extraordinary rally across the memory semiconductor sector in 2026, catapulting Micron Technology (NASDAQ: MU) and Sandisk (NASDAQ: SNDK) to staggering year-to-date gains. Yet both heavyweights have suffered sharp pullbacks of more than 20% from their late-June highs, sparking a critical debate among investors: is this slump driven by temporary market sentiment, or does it signal an end to the memory upcycle? Can AI-fuelled storage demand reignite their share prices over the long run?
Micron’s stock has surged more than 220% in 2026, though it has retreated roughly 22% after hitting its 52-week peak on June 25. Sandisk has delivered an even more dramatic yearly advance exceeding 480%, while tumbling nearly 30% since setting an all-time high on June 22. Two major concerns have triggered the recent sell-off. First, investors fear climbing memory chip prices will dampen demand for consumer electronics including smartphones and game consoles, creating a downstream drag on memory suppliers. Second, Samsung Electronics’ plans to ramp up domestic DRAM production in South Korea stoked fears of a supply glut. Sandisk once plunged 7.3% in a single session on the news, with Micron dragged lower amid broad sector risk aversion.
A closer look reveals the market’s two core worries rest on flawed assumptions, leaving the fundamental growth story of memory chips intact.
For one thing, consumer hardware no longer dictates overall memory demand trends. IDC forecasts global smartphone sales will drop nearly 14% and PC shipments will shrink 11.3% in 2026. Still, Counterpoint Research data indicates data centres now absorb over half of all DRAM output worldwide. Volatility in consumer device shipments carries far less weight for the memory industry than it did in 2022, when weak electronics sales triggered a prolonged industry downturn—a scenario unlikely to repeat under today’s AI-driven landscape.
Second, Samsung’s DRAM capacity expansion poses minimal direct threat to Sandisk’s business. Sandisk specialises exclusively in NAND flash and enterprise solid-state drives, with no exposure to DRAM manufacturing. DRAM and NAND serve distinct technical and commercial purposes for AI high-bandwidth memory applications and cannot substitute one another. Sandisk’s recent price drop largely reflects indiscriminate sector-wide selling rather than fundamental deterioration of its NAND business.
Artificial intelligence has reshaped the entire memory supply-demand balance, and the structural shortage is set to persist well beyond 2027.
High-bandwidth memory (HBM) has become an indispensable component for AI accelerators, delivering bandwidth more than 10 times higher than conventional DRAM. Each HBM stack consumes three times the wafer capacity of standard DRAM, making capacity expansion capital-intensive and time-consuming. Bloomberg Intelligence projects the global HBM market will log a 42% compound annual growth rate through 2033. Micron has also confirmed tight supply-demand dynamics will stretch past 2027.
On the NAND side, generative AI has unleashed explosive demand for enterprise storage. Workloads such as large model training and mass data retention require high-capacity enterprise SSDs. McKinsey estimates enterprise NAND SSD shipments will expand at a 35% annual clip through 2030 under baseline projections, forming Sandisk’s primary growth driver. New industry capacity is overwhelmingly allocated to high-end AI memory products, with production ramp-up cycles exceeding two years—too slow to resolve the current supply deficit in the near term.
Blowout earnings have significantly softened valuation pressure amid the stock pullback. Consensus analyst estimates predict Micron’s fiscal-year EPS will jump 785% to $73.32, with earnings poised to climb further to $152.62 in fiscal 2027. Sandisk is projected to post an astronomical 2,120% annual earnings rise to $66.41 per share for fiscal 2026. Compared with the Nasdaq Composite’s average P/E multiple of 39, both stocks trade at reasonable valuations relative to their outsized profit growth.
Nevertheless, investors must weigh material risks. Memory remains a cyclical sector, and slower-than-expected AI capital expenditure could cool storage demand growth. Sandisk’s operating margin above 70% sits at an unprecedented high and will prove unsustainable over time. Meanwhile, Micron’s market capitalisation has topped $1.1 trillion, limiting the scope for multi-fold long-term returns, so investors should temper overly bullish return expectations.
Overall, the deep correction in Micron and Sandisk stems from transient market fears and misinterpretation of industry trends, not a breakdown of the AI memory growth narrative. The pullback offers long-term investors an attractive entry point, though short-term speculative trading is not advised. Market participants should closely track supply-demand shifts and quarterly earnings delivery to navigate the sector effectively.
