South Korea’s stock market index, KOSPI, posted its second record high in a week amid AI chip sales, rocking global markets.
Friday’s 8.19% intraday drop halted another 20 minutes and dragged Wall Street, Tokyo, and Tokyo-listed SoftBank lower.
The decline is now a clear sign that the emergence of the AI chip has become a central threat to the global economy.
Factors That Caused the Recent Suspension of KOSPI
A circuit breaker is an emergency market strategy that stops trading when the index has fallen too low in a short period of time. Korea Exchange launched one on Friday at 12:10 pm local time KOSPI remained more than 8% below the previous close for one minute.
The benchmark fell by 731.97 points, down to 8,198.33 during the suspension. As a result, traders watched in real time as the index entered its fifth quarter of 2026.
Additionally, this marked only the second time that a sell-side car and circuit breaker were opened in the same session.
The KOSPI closed at 8,411.21, down 5.81% on the day. Samsung Electronics fell 5.30% to 339,500 won (~ $248), where SK Hynix down 8.36% up to 2.673 million won (~$1,950).
All chip manufacturers take about half of the market share, increasing the momentum.
Follow us on Xto hear the latest news as it happens.
Capital outflows hit hard. Foreign investors lost a total of 4.62 trillion (~$3.4 billion) during this period. Institutional investors followed with 3.78 trillion won (~$2.8 billion) in sales.
However, investors took the other side, buying a total of 8.19 trillion (~$6.0 billion) as they also increased their long-term views on AI.
The episode is coming just over three trading days after Tuesday’s 9.99% crash.. That former quarter launched the disruptor of the first quarter of the week, sending Samsung and SK Hynix down more than 12% each.
As a result, KOSPI volatility has now reached levels not seen since the index’s inception.
How AI Chip Trade Is Driving Global Risk
Friday Selloff Resources it was layer upon layer of chip memory concerns. Concerns about slowing demand and a price dispute between Apple and Micron fueled the early sell-off.
In addition, new concerns about the cost of AI infrastructure and the delay of OpenAI’s IPO added fuel to the flood.
Profitability increased the migration significantly. KOSPI rose 5% on Wednesday and another 3% on Thursday after Tuesday’s first crash. As a result, stocks tracking semiconductor-heavy indexes rallied strongly, leading to forced selling across every chip-related name in Seoul.
The negative effects reached the Korean area. Nikkei 225 down 4.15% Friday to 69,360.83, canceling Thursday’s gains and giving a level of 70,000.
In addition, SoftBank fell more than 12% in Tokyo, pressured by reports of the timing of the OpenAI IPO around the world wireframe.
Wall Street felt the move clearly. The Nasdaq Composite closed Friday with its fifth consecutive session of losses. The index fell 4.6% for the week. In addition, the S&P 500 lost almost 2% during the same period, while the Philadelphia Semiconductor Index extended a global trend that had previously swept Asia and Europe.
A critical review classifies this issue as a standard issue. With Samsung and SK Hynix representing more than half of the KOSPI, any move to memory is a benchmark event.
As a result, KOSPI-linked products are now acting less like a Korean gauge and more like a pure proxy for AI chip sentiment.
The result is a larger and more stable one. The use of AI infrastructure, memory prices, and the timing of large IPOs are now driving global risk.
Until AI chip sales start to take off, the local drivers in Seoul will still come as the first warning in any downstream market.
A note South Korean Stock Market KOSPI Just Highlighted Global AI Alert appeared for the first time BeInCrypto.
