Woofun AI reports that Micron delivered a historic earnings report for FY2026 Q3, generating revenue of $41.46 billion, which stands nearly $6 billion above market expectations. This financial performance prompted the company to provide gross margin guidance comparable to leading software firms, triggering a post-market stock surge of 13-14% and pushing its market capitalization above $1.16 trillion. The stock has more than tripled year-to-date and surged over 850% in the past 12 months, securing its position as the third-best performer in the S&P 500 in 2026, trailing only SanDisk and Western Digital. The broader storage sector is witnessing parallel expansion, with Hynix rising over 800% and Samsung increasing by more than 400% over the past 52 weeks.

Despite this extraordinary equity appreciation, storage stocks maintain remarkably low valuations relative to their growth trajectories. Market observers indicate Micron's forward 12-month PE is around 9x, while Hynix and Samsung trade at approximately 6.5x. In stark contrast, NVIDIA's forward P/E sits around 23x, Broadcom around 30x, AMD around 25x, and TSMC around 20x, with the semiconductor industry median hovering near 36x. This disparity indicates that the valuation level of the storage trio is roughly one-third of NVIDIA's and one-fourth of the semiconductor industry median, suggesting a significant disconnect between price and perceived value.

Woofun AI data shows this valuation gap persists even as the sector transitions from cyclical commodity to critical infrastructure.

Storage has evolved into a physical bottleneck within the AI industry chain, creating a rigid demand structure. AI servers require HBM for accelerator cards, large-capacity DRAM for inference workloads, and SSDs for high-speed data throughput. Micron reported data center revenue of $25 billion in a single quarter, with enterprise SSD revenue reaching $5 billion. This supply constraint is now rippling into consumer electronics, forcing companies like Apple to face mounting cost pressures as component availability tightens. The structural shift means that storage is no longer a passive component but an active limiter of AI deployment speed.

Profitability metrics across the sector reflect this demand explosion. Micron announced an EPS of $25.11 for Q3, representing a tenfold increase from the same period last year. SK Hynix reported an operating profit of 37.61 trillion Korean won in Q1 2026, marking a 405% year-on-year growth. Samsung's semiconductor division saw a more than 8-fold increase in Q1 operating profit year-on-year. Looking ahead, Micron's Q4 guidance includes $50 billion in revenue and an 86% gross margin, suggesting that price hikes are accelerating faster than previously modeled. These figures confirm that the sector is moving from recovery to a high-margin expansion phase.

Upcoming earnings reports will further clarify the sector's trajectory, with TSMC scheduled for July 16, Samsung on July 23, and Kioxia and Western Digital on July 29. TSMC's Q1 revenue was $35.9 billion, a 40.6% year-on-year increase, with a gross margin of 66.2%, where advanced processes accounted for 74% of wafer revenue. Q2 revenue guidance is set between $39 billion and $40.2 billion. A multiplier relationship exists between TSMC and storage; increased advanced process wafer sales directly lead to more AI accelerators and HBM stacks, creating a feedback loop that amplifies demand for memory components.

Samsung is expected to report Q2 operating profit around KRW 8.83 trillion, with the strategic focus shifting to HBM4 to close the gap with competitors. HBM sales are projected to grow over 3 times year-on-year in 2026, with HBM4 accounting for over 50% of HBM sales starting in Q3. Micron has revealed that HBM4 36GB 12-Hi is already in mass production, signaling a rapid technological escalation. Samsung's Q1 results showed quarterly revenue of KRW 52.6 trillion, a 198% year-on-year growth, with an operating profit margin of 72% and net profit margin of 77%. Western Digital reported Q4 results focusing on NAND and SSD, noting cloud revenue grew by 48% year-on-year with a record gross margin of 50.5%. Western Digital and SanDisk were the top two performing stocks in the S&P 500 in 2026.

Analysts argue that AI has fundamentally transformed storage from a commodity to a luxury good, shattering the historical trend of decreasing DRAM costs per Gb. Manufacturers have shifted capacity to HBM, creating a structural supply tightness that TrendForce data confirms with traditional DRAM contract prices rising by 90% to 95% in Q1 2026 compared to the previous quarter. JPMorgan predicts DRAM prices may rise for four consecutive years, marking a departure from decades of deflationary pressure in the memory market.

NAND chips may face even more severe scarcity than HBM due to prolonged underinvestment. NAND manufacturers have not expanded capacity for several years following price drops in 2022-2023, and new production lines are not expected until 2027. Demand for enterprise SSDs (eSSDs) is exploding as large-scale model inference requires massive KV cache, driving global eSSD revenue up by 86% in Q1 2026. HDD shortages are also forcing data centers to substitute high-capacity SSDs, further straining supply. Phison's CEO stated that every NAND manufacturer is sold out for 2026, a sentiment confirmed by Kioxia, which noted all NAND capacity for 2026 is sold out. The price of a 1Tb TLC NAND chip increased from around $4.8 in July 2025 to around $10.7 by the end of 2025. This marks the most significant pricing inversion in the storage industry in over a decade.