# South Korean KOSPI market volatility > Live situation record from CLSTR: https://clstr.news/situations/south-korean-kospi-market-volatility > Updated: 2026-09-05T22:16:37.000Z. Sources: 34. Developments: 4. The South Korean KOSPI index underwent extreme volatility following a massive selloff in July, where the index lost approximately 40% of its value from its June peak. This decline was primarily driven by the unwinding of leveraged retail positions in AI-related semiconductor stocks, including Samsung Electronics and SK Hynix. The market volatility peaked on July 28 with a single-day decline of 10.84%, erasing over $2 trillion in market value and triggering circuit-breaker halts. In response, South Korean regulators implemented measures to curb speculation, such as raising barriers to trading single-stock leveraged ETFs and tightening margin trading requirements. While the market showed signs of a rebound in early August, subsequent reports indicated that a decline in the KOSPI has been linked to the stabilization of the exchange rate. By early September, the KOSPI showed signs of recovery, rising 16.76 points to close at 6,579.48. This rebound followed a significant plunge caused by Middle East tensions and concerns regarding U.S. Federal Reserve interest rate hikes. By September 5, 2026, the KOSPI approached the 7,000-point mark, driven by optimism surrounding artificial intelligence. The release of OpenAI’s new AI model, ‘Astra,’ fueled expectations for increased demand for high-capacity memory products, benefiting major chipmakers like SK Hynix and Samsung Electronics. SK Hynix shares rose over 8% during this period. This rally was supported by massive net purchases from foreign investors and record-breaking economic data; South Korea’s cumulative exports from January to August reached $709.4 billion, surpassing the previous year’s full-year total. Specifically, semiconductor exports saw explosive growth, with August figures showing a 209% year-on-year increase. ## Claims - South Korean semiconductor exports in August rose 209% year-on-year to a record $46.65 billion. (corroborated by 3 sources) - The KOSPI index closed up 4.61% at 6,995.39. (corroborated by 3 sources) - SK Hynix shares rose 8.26% to 1,783,000 won. (corroborated by 3 sources) - South Korea's cumulative exports from January to August reached $709.4 billion, surpassing the total recorded for the entire previous year. (corroborated by 3 sources) - Samsung Electronics shares rose 5.68% to 270,000 won. (corroborated by 2 sources) - South Korea is projected to reach $1 trillion in annual exports by early December. (corroborated by 2 sources) - South Korean exports to India increased by 30.8% year-on-year to $16.8 billion between January and August. (single source) - Goldman Sachs raised its KOSPI target for South Korea from 9,000 to 12,000. (single source) - Brent crude oil prices rose 0.7% to $96.97 per barrel. (single source) - Goldman Sachs raised its 12-month target for the MSCI Asia Pacific ex-Japan Index to 1,080. (single source) ## Timeline ### 2026-09-05: South Korean semiconductor stocks surge on AI demand optimism South Korean semiconductor stocks and the KOSPI surged following OpenAI's 'Astra' release, driven by AI memory demand. Cumulative exports have already surpassed last year's total, reaching $709.4 billion. 29 sources. https://clstr.news/cluster/south-koreas-kospi-rises-amid-interest-rate-concerns ### 2026-09-03: KOSPI rises as auto and aerospace stocks lead recovery South Korea's KOSPI rose 0.26 percent to close at 6,579.48, supported by gains in auto and aerospace stocks and easing global concerns over interest rates and Middle East tensions. 5 sources. https://clstr.news/cluster/kospi-rises-as-auto-and-aerospace-stocks-lead-recovery ### 2026-08-18: KOSPI decline linked to exchange rate stabilization The KOSPI decline is reportedly contributing to exchange rate stabilization, with rates observed at the 1,399 level. 2 sources. https://clstr.news/cluster/kospi-decline-linked-to-exchange-rate-stabilization ### 2026-08-04: KOSPI index recovers after massive 40% selloff in AI chip stocks South Korea's KOSPI index suffered a 40% drop from its June peak during a July selloff of AI chip stocks, driven by leveraged retail unwinding, before attempting a recovery in early August. 40 sources. https://clstr.news/cluster/asml-shares-slide-as-analysts-weigh-split-prospects-and-raise-targets --- Cite as: South Korean KOSPI market volatility. CLSTR, https://clstr.news/situations/south-korean-kospi-market-volatility