SK Hynix Shares Tumble After Record IPO Amid AI Stock Concerns

Shares of memory chip companies experienced a notable decline across U.S. markets on Monday, signaling investor apprehension regarding the future trajectory of the AI stock market boom. SK Hynix's American depository shares fell by 8.9% by midday, just days after its substantial stock market debut, which was the largest U.S. IPO ever by a foreign entity. The company also led declines in South Korea, plummeting a record 15%, with tech giant Samsung seeing a 10.5% drop. These significant drops for SK Hynix and Samsung, which are dominant players in South Korea's Kospi index, were severe enough to trigger temporary trading halts. The selloff has now extended to the Nasdaq, where SK Hynix has established its new secondary listing.

Other memory storage companies also saw their stock prices decrease. Micron Technology was down 4.8%, SanDisk fell 10.7%, and Western Digital declined by 5.9% by midday Monday. Investors had initially shown strong interest in SK Hynix's U.S. debut on Friday, eager to invest in a company that has significantly benefited from the expansion of AI infrastructure. SK Hynix holds the global leadership position in high-bandwidth memory, a critical component for advanced AI servers. The IPO successfully raised $26.5 billion and was oversubscribed by more than seven times.

SK Hynix has reported substantial increases in revenue and profit, driven by an ongoing shortage of memory chips and the high demand from AI companies for data center construction. In the first quarter of 2026, the company's operating profit surged by 405% year-over-year, with revenue increasing by 198%, according to SK Hynix's April report. Despite these strong financial results, analysts are expressing concern over the rapid reversal in share prices. Semiconductor stocks have exhibited considerable volatility in recent weeks, following a period of significant rallies earlier in the year.

Susannah Streeter, chief market strategist at Wealth Club, commented on the situation, stating in a note that "It was always going to be a volatile ride after the company’s American depositary receipts began trading at such a heady valuation." She further indicated that while current demand for SK Hynix's products is exceptionally high, there are underlying concerns that a substantial portion of this demand might be front-loaded, suggesting potential future moderation.