Global chip stocks tumbled on July 13, 2026, as a sharp decline in South Korea’s SK Hynix triggered a wider sell-off across U.S. and Asian markets.
The volatility began with a bruising session for South Korean technology firms. Samsung Electronics and SK Hynix both fell by about 12%, contributing to a chaotic morning on the benchmark Kospi index. Trading was paused temporarily on Tuesday morning after an initial 8% slide; once the 20-minute halt ended, the index dropped further to trade around 10% lower.
This is not an isolated tremor. The tech-heavy Kospi has been halted eight times so far this year under circuit breaker mechanisms designed to curb panic selling. While the index more than doubled from January to mid-June, it has since surrendered approximately one-third of those gains.
SK Hynix and the Global Domino Effect
The contagion spread rapidly from Seoul to New York and Europe. SK Hynix’s Seoul-listed shares tumbled over 15% following a historic U.S. trading debut on Friday. On Monday, its US-listed shares fell 7.5% to drop well below the $149 offer price set when it made a record-breaking debut on the Nasdaq on 9 July.
In the U.S., the decline hit several major players: Sandisk slid more than 8%, Micron Technology lost 5%, and Intel dropped 4.1%. The Nasdaq index finished nearly 1% lower. European markets mirrored this pessimism, with ASML—the most valuable company in Europe—falling 2.5%, while Infineon Technologies and STMicroelectronics dropped 4% and 1.8% respectively.
The shift in sentiment had a direct impact on the global leaderboard. Nvidia shares fell 5% in New York on Monday, a move that allowed Apple to overtake Nvidia as the world’s most valuable company. Apple’s rise was supported by a roughly 25% increase in value this year.
The ‘Crowded Trade’ and AI Capex Anxiety
Analysts are debating whether this crash is a fundamental shift or a tactical retreat. Some point to a specific catalyst: a Wall Street Journal report that Nvidia is in talks to provide around $250bn for OpenAI as part of a massive data-centre project. This has led some to question if the technology can eventually become profitable enough to recoup such staggering investments.
However, other experts argue the crash is less about AI demand and more about the mechanics of the trade. Helen Jewell of BlackRock suggests the volatility is a product of investors pulling back from crowded bets
on a small number of chipmakers.
This “crowding” effect has created a fragile environment where sentiment can shift violently without any material change in business fundamentals. Amish Patel, head of equity research at Raymond James, noted that the SK Hynix fall was primarily a positioning and sentiment-driven move
.
Regional Rebalancing in Emerging Markets
The AI sell-off has triggered a broader reassessment of regional portfolios. In South Korea, the benchmark KOSPI closed down 4.5% on Monday, bringing its monthly losses to more than 22% and pushing it into bear-market territory.
The volatility has prompted institutional shifts. Citi analysts cut Korea to “neutral” from an “overweight” rating it had held since July 2025, citing volatile trading conditions.
According to Jason Lui, head of APAC equity derivative strategy at BNP Paribas, investors may be unwinding a long North Asia, short South Asia
strategy. This shift has redirected attention toward defensive repositioning in markets like Indonesia, China, and India, though Lui cautioned this may not be a durable rotation.
The Sustainability of the Boom Phase
The central tension for investors is whether the AI-driven surge is a permanent shift or another cycle in a historically volatile sector. The PHLX Semiconductor Index had risen around 83% for the year up to the Friday before the crash, leading many to cash out.
Ozkardeskaya warned that volatility in memory chip prices remains far too high
to consider the current price action sustainable. This sentiment is echoed by Andrew Ye of Global X ETFs, who noted the difficulty in reconciling the long-term outlook with the short-term vagaries of a sentiment-driven market.
The market now looks toward upcoming earnings reports to find a floor. ASML is scheduled to report on Wednesday, and Taiwan Semiconductor Manufacturing Co. reports second-quarter earnings on Thursday, following a 6.2% on-month revenue rise in June.
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