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KOSPI Surges to Touch 7,000 Mark, Samsung Electronics Jumps Over 3% as Japanese Markets Close for Three Days

TradingKey

AuthorBlock Tao

Sep 21, 2026 12:37 AM

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During Asian trading on September 21, South Korean stocks opened higher as easing selling pressure in semiconductor and AI supply chains drove bargain-hunting after last week’s corrections. The KOSPI index briefly touched the 7,000 mark before retreating to trade at 6,943.29 points, up 0.71%. Major tech heavyweights rebounded strongly, with Samsung Electronics jumping 3.26% and SK Hynix gaining 1.08%. Meanwhile, Japanese markets remained closed for a three-day holiday weekend ending September 23, accumulating potential volatility that may trigger catch-up price movements when trading resumes on Thursday, September 24.

AI-generated summary

TradingKey - South Korean stocks surge at the open to hit the 7,000 mark, Samsung Electronics spikes 3.26% in a major rebound, while Japanese markets are closed for a three-day holiday.

During Asian trading hours on September 21, Japanese stock markets were closed for Respect for the Aged Day, while South Korean stocks opened higher before pulling back. The KOSPI index surged rapidly after the open, briefly touching the 7,000 mark before retreating, up 0.71% to temporarily trade at 6,943.29 points.

The two core tech chip stocks opened higher and moved upward, with Samsung Electronics delivering an even brighter performance, jumping 3.26% to approach the 270,000 mark, temporarily trading at 269,500 won; SK Hynix rose 1.08%, temporarily trading at 1,877,000 won.

kospi-d9838a6b3b0946b08de52758129575b6 KOSPI Index Chart, Source: TradingView

Last Friday, selling pressure in the semiconductor and AI supply chains eased, boosting opening buying momentum for South Korea's two major heavyweights (Samsung Electronics and SK Hynix). In addition, after the KOSPI experienced a significant correction last week, the market has gradually digested the short-term impact of the Federal Reserve's (Fed) hawkish rate outlook and international oil price volatility, attracting bargain-hunting capital into the market.

Japan is closed for a three-day long weekend starting September 21 for holidays including Respect for the Aged Day and Autumnal Equinox Day. If international markets or the exchange rate (USD/JPY) experience sharp fluctuations, energy could accumulate and be reflected in catch-up gains or losses after the open on Thursday, September 24.

This content was translated using AI and reviewed for clarity. It is for informational purposes only.

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Disclaimer: The content of this article solely represents the author's personal opinions and does not reflect the official stance of Tradingkey. It should not be considered as investment advice. The article is intended for reference purposes only, and readers should not base any investment decisions solely on its content. Tradingkey bears no responsibility for any trading outcomes resulting from reliance on this article. Furthermore, Tradingkey cannot guarantee the accuracy of the article's content. Before making any investment decisions, it is advisable to consult an independent financial advisor to fully understand the associated risks.

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