Micron Surges 38% in a Week, Market Cap Breaks 840 Billion, Can This AI Memory Leader Continue the Rally?

The fundamental logic driving Micron's stock price increase is that the global memory chip market has fully transitioned into a seller's market. Current DRAM and NAND inventories can only support four weeks of demand, which is at historical lows; SK Hynix has also publicly stated that it currently cannot fully cover the order demands of all customers.

As a core component of AI computing power, Micron's full-year 2026 High Bandwidth Memory (HBM) capacity has already been locked in by customers in advance, with shipment plans for HBM3E and HBM4 products confirmed through long-term supply agreements.

In March this year, Micron signed the industry's first five-year strategic supply agreement with core customers, clarifying shipment volumes and price commitments for several years to come. This long-term agreement model is gradually replacing traditional spot trading; currently, most of SK Hynix's long-term agreement cycles are 2-3 years, and Samsung is also pushing for its cooperation with major clients such as Google ( GOOGL) and Microsoft ( MSFT) and other major customers to transition toward long-term agreement models.

Compared with the 2016-2018 industry cycle, the price premium for HBM products in this round has reached several times the previous levels, and the long-term agreement model has significantly extended the duration of high price levels.

Leveraging capacity expansion and technological breakthroughs, Micron's HBM market share jumped from approximately 5% in 2024 to 21% in the second quarter of 2025, surpassing Samsung to become the world's second-largest HBM supplier.

However, in the layout of the next-generation AI memory supply chain, Micron may face periodic challenges. In the first quarter of 2026, Micron has already begun mass supply of HBM4 products customized for NVIDIA ( NVDA )'s Vera Rubin AI chips, but according to a report by semiconductor industry analysis firm SemiAnalysis, Micron did not secure any supply share during the initial launch phase of the Vera Rubin platform, while SK Hynix and Samsung accounted for approximately 70% and 30% of the supply volume, respectively.

Considering NVIDIA's over 80% share in the AI chip market, this means Micron faces a risk of a periodic supply gap in the next-generation AI memory supply chain. Currently, the company plans to resubmit its product qualification test application in the second quarter of 2026.

[Source: TradingKey]

According to TradingKey data, the average price target from 45 analysts is approximately $540, significantly below current share price levels. Valuation discrepancies among different institutions are evident: the most aggressive, Sarfatti Investment Research, issued a target price above $1,500; DA Davidson sees it at $1,000; while Citi ( C) lowered its price target to $425.

From a valuation perspective, Micron's forward P/E ratio for the next 12 months is approximately 9.2x. This is not only substantially lower than the semiconductor industry's median valuation of 32x but also significantly below the 22x P/E ratio of NVIDIA, another core component of the AI supply chain.

The current single-digit P/E ratio appears at the peak of the profit cycle. Micron's earnings per share (EPS) for the second quarter of fiscal 2026 was approximately $12.2, with expectations to climb further to $18.9 in the following quarter.

The head of quantitative research at Seeking Alpha noted that this combination of low valuation and high growth is extremely rare, and the quantitative model maintains a "Strong Buy" rating.

However, the bears argue that current signals hide underlying risks, pointing to a similar combination of peak profits and low valuations during the 2016-2018 industry cycle, which was followed by a sharp decline in share prices. The divergence between the two sides will be tested by Micron's upcoming earnings report on July 1.

In terms of the competitive landscape, SK hynix remains in the top position with a market share of 52%-62%. Samsung's market share is expected to rise once it completes HBM3E certification.

Micron is accelerating its capacity layout, advancing the construction of five wafer fabs globally. Its capital expenditure plan for fiscal year 2027 calls for an additional allocation of over $10 billion on top of the $25 billion plus planned for fiscal year 2026.

Notably, Micron insiders have cumulatively reduced their holdings in the company over the past three months, cashing out $52 million. This includes CEO Mehrotra's divestment of approximately $21.5 million in early May.

In addition to changes in the competitive landscape, heavy capital expenditures, and insider selling, technical signals have emerged that warrant caution: the RSI indicates Micron has entered overbought territory, with profit-taking pressure rising and the probability of a short-term correction increasing significantly.

Looking back at the historical performance of the AI hardware sector, companies such as Nvidia and Broadcom ( AVGO) have all experienced corrections of 20%-30% after similar rallies, followed by stock prices reaching new highs. Whether Micron can replicate this trend depends fundamentally on whether subsequent earnings reports can continue to validate the strength of AI demand.

Micron is scheduled to release its third-quarter fiscal results on July 1. The market will focus on the gap between its $33.5 billion revenue guidance and actual performance, while investors will watch whether the revenue guidance for the next quarter remains flat sequentially, which could serve as an early signal of a cyclical inflection point for the industry.

This content was translated using AI and reviewed for clarity. It is for informational purposes only.