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Japanese and South Korean Stocks Rebound in Early Trade, KOSPI Rises Over 3%, SK Hynix Surges Over 8%, Samsung Gains Over 5%

TradingKeyAug 20, 2026 12:42 AM
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Japanese and South Korean stock markets rebounded notably on August 20, driven by an overnight U.S. stock rally and strong gains in regional tech shares. The KOSPI surged 3.71% and the Nikkei 225 gained 1.25%. South Korean chipmakers led the advance, fueled by SK Hynix’s announcement of a massive 40 trillion won share buyback and cancellation plan, reflecting management's confidence in the company's undervaluation. Major U.S. indices also stabilized, ending a three-day losing streak to provide broader support for Asian market sentiment.

AI-generated summary

TradingKey - On August 20, Japanese and South Korean stock markets rebounded noticeably in early morning trading, as an overnight rally in US stocks provided support for Asian markets. South Korea's benchmark KOSPI Index opened up 3.2% at 6,680.34 points, with gains later expanding to 3.71% to reach 6,711.14 points; Japan's Nikkei 225 Index (JPN225) opened 0.6% higher at 65,732.79 points, before extending gains to 1.25% at 66,145.98 points.

kospi-d60c65c6eca44491863ce3e39aad989a

Source: TradingView

South Korean chip stocks became the primary driver of the market, with SK Hynix surging 8.60% to 1,629,000 won (about $1,174), and Samsung Electronics rising 5.25% to 260,500 won.

In the Japanese market, Kioxia rose 3.84% to 51,870 yen (about $328); SoftBank Group advanced 3.00% to 5,384 yen, as Japanese and South Korean tech stocks extended their overall rebound.

The focal point of the rally in South Korean equities came from SK Hynix's shareholder return plan. On August 19, the company announced that its board of directors had approved the buyback and cancellation of company stock worth 40 trillion won (about $28.3 billion), indicating management believes the current share price is below the fair value corresponding to the company's business competitiveness and cash-generation capability.

Meanwhile, the three major US stock indexes ended a three-consecutive-session losing streak overnight. The S&P 500 Index rose 0.21% to close at 7,707.98 points; the Dow Jones Industrial Average gained 0.22% to 53,463.05 points; and the Nasdaq Composite Index added 0.16% to 26,331.09 points.

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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