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Japanese and South Korean Stocks Close Higher as Kospi Surges Over 3%; SK Hynix and SoftBank Soar 5%

TradingKey

AuthorBlock Tao

Oct 27, 2026 6:58 AM

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During the Asian trading session on October 27, Japanese and South Korean equities closed strongly higher, driven by major technology and semiconductor heavyweights. South Korea's KOSPI surged 3.09% to finish at 5,638.35 points, temporarily triggering a buy-side circuit breaker, while the Nikkei 225 Index gained 1.73% to close at 63,268.32 points. Market sustainability remains contingent on upcoming US earnings from Seagate and critical disclosures from SK Hynix regarding special dividends and HBM4 yields, which will clarify whether the rally reflects short covering or a medium-term bull market resumption.

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TradingKey - Japanese and South Korean Stocks Close Strongly Higher; KOSPI Surges 3.09%, SK Hynix Soars Over 5% Joining SoftBank in a Major Rally.

During the Asian trading session on October 27, major Japanese and South Korean stock indices closed strongly higher throughout the day. Among them, South Korea's KOSPI triggered a buy-side circuit breaker mechanism during morning trade due to an excessive surge, briefly breaking above 5,700 points. As of the close, the KOSPI rose 3.09%, holding above the 5,600 mark to finish at 5,638.35 points. Industry leader Samsung Electronics ended up 4.23% at 222,000 KRW, while SK Hynix surged 5.18% to close at 1,341,000 KRW.

kospi-01ecbc8ad2b044ec86ecce2e31722e82 KOSPI Index Chart, Source: TradingView

The Nikkei 225 Index ended up 1.73% to close at 63,268.32 points. Gains between two major heavyweights showed significant divergence: Kioxia edged up just 0.44% to close at 12,605 JPY, while SoftBank surged 4.95% to finish at 4,474 JPY.

Tonight's earnings report from U.S. stock Seagate (STX) will influence cross-border capital staying power in Japanese and South Korean semiconductor heavyweights. Meanwhile, tomorrow's (October 28) SK Hynix earnings report and conference call—along with official statements on the timeline for the 16 trillion KRW special dividend payout and HBM4 yields—will determine whether today's surge is short-term short covering or the resumption of a medium-term bull market.

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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