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Japan, South Korea Stocks Open Higher and Extend Gains; KOSPI Reclaims 6,600, SoftBank Surges Over 7%, Samsung and SK Hynix Jump Over 2%

TradingKey

AuthorBlock Tao

Sep 4, 2026 12:31 AM

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On September 4, Japanese and South Korean stock markets opened strongly higher, driven by stabilizing overnight US equities and easing Federal Reserve rate hike expectations. South Korea's KOSPI index gained 1.53% to reclaim 6,600 points, led by rallies in Samsung Electronics and SK Hynix. Japan's Nikkei 225 also advanced, bolstered by a 7.06% surge in SoftBank and gains in Kioxia. The strong performance of US semiconductor and AI tech giants injected capital confidence into these tech-dependent regional supply chains, though the Nikkei's early gains later narrowed.

AI-generated summary

TradingKey - Japanese and South Korean stock markets open strongly higher; KOSPI reclaims 6,600 points; SoftBank surges 7%; chip stocks like Samsung and SK Hynix rally across the board.

In Asian trading on September 4, stock markets in Japan and South Korea both rebounded in early trading, opening higher and pushing further up. South Korea's KOSPI Index opened up 1.53%, reclaiming the 6,600 level and trading temporarily at 6,680.44 points. Core tech chip stocks also opened higher and gained further momentum, with Samsung Electronics rising 2% to trade temporarily at 255,000 KRW, and SK Hynix advancing 2.82% to trade temporarily at 1,641,000 KRW.

kospi-38365a01bfd044b380e642d820669c6a KOSPI index chart, source: TradingView

The Nikkei 225 Index opened 0.44% higher, with gains currently narrowing to 0.24%, trading temporarily at 64,369.88 points. Both major heavyweight stocks advanced: SoftBank's stock price surged 7.06%, strongly breaking through the 5,000 mark to trade temporarily at 5,354 JPY; Kioxia rose 1.26% to trade temporarily at 52,320 JPY.

Market expectations for subsequent Federal Reserve rate hikes dropped significantly, while US Treasury yields and the US Dollar Index pulled back slightly, allowing overnight US stocks to stabilize. In particular, strong performance by US semiconductor and AI tech giants injected capital confidence into the Japanese and South Korean markets, both of which are highly dependent on the electronics and semiconductor supply chains.

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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