Memory chip stocks suffered steep losses on Tuesday, extending a broad technology selloff as investors grew increasingly uneasy about the massive sums being poured into artificial intelligence infrastructure and the growing reliance on debt to finance that expansion.
Shares of Micron Technology fell more than 8% in morning trading, while Sandisk tumbled over 10%. Seagate Technology dropped more than 7%, and Western Digital slid over 8%. The weakness followed a sharp selloff across Asian technology markets earlier in the day, with South Korean memory giants Samsung Electronics and SK Hynix each falling more than 12%.
The declines marked a sharp reversal for a sector that has been among the biggest beneficiaries of the AI boom. Investors had poured money into memory stocks over the past year, betting that demand for high-performance memory chips used in AI data centers would remain robust for years. However, analysts say market participants are beginning to question whether the industry's massive capital spending plans are sustainable.
AI Spending Concerns Move to Center Stage
The latest catalyst for those concerns came from SpaceX, whose shares plunged 16.4% on Monday after unveiling plans for a major bond sale. Although SpaceX shares were slightly up on Tuesday, analysts said the bond sale had amplified worries surrounding the broader AI ecosystem. Ipek Ozkardeskaya, senior analyst at Swissquote, said the company had reignited concerns that technology firms may be spending too aggressively. She noted that Morgan Stanley expects global AI-related borrowing to exceed half a trillion dollars this year, making corporate debt markets increasingly tied to the AI theme.
Concerns are spreading beyond individual companies because some of the world's largest technology firms have collectively committed hundreds of billions of dollars toward building AI infrastructure. Companies including Alphabet, Amazon, Microsoft, Meta Platforms, and Tesla continue to ramp up investments in data centers and computing capacity, even as investors seek clearer evidence that those spending plans can deliver returns that justify the costs.
Valuations Leave Little Room for Disappointment
Memory stocks have become particularly vulnerable because of their extraordinary gains this year. Micron shares have surged more than 250% so far in 2026. Sandisk has risen over 639%, while Seagate and Western Digital have gained more than 257% and 260%, respectively. Such gains have left valuations stretched and increased investor sensitivity to any signs that enthusiasm around AI may be overheating.
Joachim Klement, investment strategist at Panmure Liberum, said the sector had become excessively extended. He warned that the correction could become more severe if investors increasingly question the sustainability of massive AI spending plans. Nigel Green, chief executive of investment adviser deVere Group, told Reuters, "The AI trade became one of the most crowded trades in global markets. When everybody owns the same stocks, the exit door becomes very small very quickly."
Higher Rate Expectations Add to Pressure
Technology stocks are also contending with a less favorable interest-rate environment. According to CME's FedWatch Tool, traders now see an 88% probability of a Federal Reserve rate increase in December, sharply higher than the 61% probability seen before the central bank's meeting last week. The prospect of higher borrowing costs poses an additional challenge for highly valued technology companies, particularly those dependent on large amounts of capital to fund ambitious AI infrastructure projects.
For more on the broader selloff, see AI and Chip Rout Sinks Nasdaq 2.2%; Dow Loses 320 Points as Micron Plunges 12% and AI Stock Rout Deepens as Iran Talks Ease Oil, Gold; Debt-Fueled Spending Worries Mount.
This article is for informational purposes only and does not constitute financial advice.
