South Korean financial markets reopened after a three-day holiday to a sharp divergence on Monday as the South Korean won surged to a two-year high of 1,333.30 per dollar, while the benchmark KOSPI index plunged over 3%, wiping out 162.7 trillion won ($108 billion) in market capitalization.
Tech Giants Lead Market Sell-Off
The stock market downturn was heavily driven by major semiconductor manufacturers following foreign net outflows of 458 billion won from KOSPI shares by 9:55 a.m. Shares of SK Hynix fell 3.81% to 1.617 million won, extending its drop since October 7 to 7.23%, though the stock remains up 138.85% year-to-date. Samsung Electronics dropped 3.63% to 252,500 won, bringing its post-October 7 decline to 7.68% despite projecting a record preliminary third-quarter operating profit of 107.4 trillion won on October 8. Samsung remains up 96.5% since January 1.
The tech-heavy KOSDAQ fell even more steeply, dropping 4.29% to 853.98. The KOSPI has now crashed 31% from its peak in June. Analysts attributed the equity weakness to escalating Middle East tensions, overvaluation concerns surrounding artificial intelligence stocks, and the winding down of combined share buybacks worth 55 trillion won by Samsung and SK Hynix.
Dollar Weakness and Foreign Capital Dynamics
Despite the sell-off in technology equities, the won strengthened by as much as 0.8% from its previous close before settling at a 0.5% gain. Min Gyeong-won, an economist at Woori Bank in Seoul, explained that the currency's advance was driven by broad weakness in the U.S. dollar, alongside falling crude oil prices and gains in the euro, British pound, and Japanese yen. The won has gained 7.7% since January, shifting from Asia's worst-performing currency in the first half of the year to its best performer in the second half.
While steady dollar conversions from chipmakers continue to support currency demand, high foreign equity outflows demonstrate how automated trading and rapid capital shifts impact regional markets, similar to dynamics seen in South Korea's Kimchi Premium.
Key Takeaways
- The KOSPI fell over 3% (erasing 162.7 trillion won), while the KOSDAQ slid 4.29% to 853.98.
- SK Hynix dropped 3.81% to 1.617 million won, and Samsung Electronics declined 3.63% to 252,500 won.
- Foreign investors net sold 458 billion won in KOSPI equities in early Monday trading.
- The South Korean won rallied up to 0.8% to hit a two-year high of 1,333.30 per dollar.
Why It Matters
This stark decoupling between South Korea's currency and its premier export stock giants highlights how global macroeconomic forces can overshadow strong corporate fundamentals. While export dollar conversions provide underlying demand for the won, equity markets are losing key structural support as corporate buyback programs draw to a close. Investors should monitor whether heavy foreign capital outflows from Korean chipmakers signal a broader retreat from tech and risk-on assets across Asian markets.
