South Korea’s stock market faced a brutal session on Thursday as shares of semiconductor giants Samsung Electronics and SK Hynix tumbled. The sharp decline rippled across the KOSPI index, which suffered a significant drop of nearly 6% as investor anxiety regarding the artificial intelligence boom reached a boiling point. The selloff highlights a growing fear that the multi-billion-dollar infrastructure spending spree that has fueled the chip industry for months may be losing its momentum.
Market sentiment soured following a weak performance in U.S. technology stocks overnight. Semiconductor companies, which had been the primary drivers of global market gains this year, saw their valuations suddenly questioned. Investors are now worried that the massive capital expenditures by hyperscalers—the massive cloud providers building the backbone of AI—might not yield the quick returns that were once expected.
A primary catalyst for Thursday’s decline was a shift in how the industry views AI computing power. Reports surfaced that Meta Platforms is exploring a cloud infrastructure business to sell off excess AI computing capacity to external customers. While the news triggered a nearly 9% surge in Meta’s own stock price, it sent shockwaves through the hardware sector. For investors in Samsung and SK Hynix, the news suggested that the “infinite” demand for chips might be cooling, as one of the world’s biggest buyers signaled that it might actually have more capacity than it currently needs.
Adding to the pressure, rumors regarding Apple’s supply chain strategy further rattled shareholders. Reports indicate that Apple is evaluating memory chips from Chinese suppliers. This potential move raised concerns that the long-standing competitive advantage held by the two South Korean memory leaders could be eroding. With Samsung and SK Hynix accounting for a massive portion of the KOSPI’s total market value, any hesitation regarding their future earnings disproportionately drags down the entire South Korean exchange.
The selloff also reflects a broader “risk-off” environment among investors. After a year of record-breaking growth, many are rushing to lock in profits. The transition from a state of euphoria, where investors bought any stock tied to the AI banner, to a more cautious approach, has left the semiconductor sector particularly vulnerable. When major U.S. players like Micron Technology and SanDisk suffer double-digit percentage drops, it is almost inevitable that their international peers will face similar scrutiny and selling pressure.
Despite the current market turbulence, analysts remain divided on the long-term outlook for the semiconductor industry. While the immediate focus is on cooling capital expenditure and fears of a supply glut, memory chips remain essential components for everything from smartphones to the massive data centers powering modern AI. However, for now, the market is choosing to prioritize caution, with both Samsung and SK Hynix likely to face continued volatility as the industry attempts to reset its growth expectations.
