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Japan and South Korea Stocks Rebound After Slump: Kioxia Leads Gains, Samsung, SK Hynix and SoftBank Rise

TradingKey

AuthorBlock Tao

Jul 21, 2026 12:35 AM

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Japanese and South Korean equity markets staged a technical rebound on July 21, with the Nikkei 225 and KOSPI rising 1.07% and 0.23% respectively. Gains were driven by major tech stocks, including Kioxia and Samsung Electronics, recovering from oversold conditions. Current market volatility reflects geopolitical tensions in the Middle East and global AI sector deleveraging. Investor sentiment remains cautious, with short-term market direction contingent on upcoming US corporate earnings and AI capital expenditure guidance from key industry leaders, including Google, Intel, IBM, and Tesla.

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TradingKey - Japanese and South Korean stock markets rebounded after a sharp decline, with the KOSPI and Nikkei 225 rising slightly. Kioxia led the gains, while Samsung Electronics, SK Hynix, and SoftBank followed suit.

During the Asian session on July 21, Japanese and South Korean stock markets showed a stark divergence at the open, with Japan opening higher and South Korea opening lower, though both posted modest gains. The Kospi Composite Index (KOSPI) extended Monday's panic at the open, weakening briefly before recovering to rise 0.23%, temporarily trading at 6,531.07; Samsung Electronics rose 1.33% to 247,000 Korean won, while SK Hynix gained 0.85% to 1,779,000 Korean won.

kospi-cfe6256d573e49c8a0a0963e866d8c4f KOSPI Index Chart, Source: TradingView

The Nikkei 225 Index saw a technical rebound from oversold conditions after a one-day holiday, opening lower but moving higher to rise 1.07%, temporarily trading at 64,826.16. Heavyweight stocks diverged, with Kioxia rising 3.38% to 53,870 yen, while SoftBank rose 0.74% to 5,464 yen.

The current extreme volatility in the Japanese and South Korean stock markets is, in essence, the result of soaring geopolitical tensions between the US and Iran in the Middle East intertwined with deleveraging in the global AI tech sector, keeping market capital extremely cautious. In the short term, whether Asia-Pacific tech stocks can truly halt their decline still depends heavily on the upcoming US corporate earnings reports and AI capital expenditure guidance this week, including Google ( GOOG ), Intel ( INTC ), IBM ( IBM ), Tesla ( TSLA ), among others.

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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