AI Memory Stocks Pull Back as Competition Concerns and Macro Pressures Weigh on Micron and SK Hynix

Shares of major artificial intelligence memory chipmakers Micron Technology, Inc. (MU) and SK hynix Inc. (000660) faced downward pressure as investors evaluated the sustainability of AI capital expenditures and potential market competition. A recent progress update from Chinese firm ChangXin Memory Technologies regarding a new DRAM architecture that could expand memory density by 30% to 50% added to market anxiety, alongside rising inflation figures that raised concerns about funding costs for AI data centers.

Despite market volatility, both chipmakers reported strong underlying operational momentum fueled by high-bandwidth memory demand. SK Hynix reported second-quarter 2026 revenue of 79.32 trillion won, up 257% year-over-year, supported by a 40-trillion-won share buyback program. Meanwhile, Micron projected fiscal first-quarter 2027 revenue of $61.5 billion, representing 351% year-over-year growth, with the majority of its 2027 high-bandwidth memory capacity already contracted under long-term customer agreements.

Investors will be watching how memory chipmakers execute their planned global manufacturing expansions and manage rising capital expenditure demands. Key milestones include the deployment of next-generation HBM4 memory technologies, the scale of Chinese manufacturing competition, and whether customer financial commitments remain steady through upcoming funding cycles.