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Japan and South Korea Stocks Open Lower, SK Hynix Opens Down Over 2%, Nikkei 225 Drops 0.3%

TradingKey
AuthorJay Qian
May 28, 2026 1:47 AM

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Asian stock markets opened lower on May 28, with South Korea's KOSPI down 0.95% and Japan's Nikkei 225 down 0.3%. The decline was attributed to a pause in AI chip stock rallies, falling oil prices, and geopolitical uncertainty stemming from U.S.-Iran relations. SK Hynix initially fell but later traded higher, while Samsung Electronics opened lower. Major Japanese exporters also saw slight pullbacks. Overnight U.S. markets closed with modest gains, but President Trump's comments on Iran introduced conflicting signals impacting Asian sentiment. The USD/JPY traded around 159.5.

AI-generated summary

TradingKey - During the Asian trading session on May 28, both Japanese and South Korean stock markets opened lower. The South Korean KOSPI index opened down 78.27 points, or 0.95%. Yesterday, the index closed at a record high of 8288.7 points, marking four consecutive sessions of gains.

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[Source: TradingView]

SK Hynix opened at 2.189 million won, down 2.41%, before rebounding to trade higher. As of press time, SK Hynix was trading at 2.271 million won, up 1.27%. Samsung Electronics opened at 305,000 won, down approximately 2,000 won or 0.65% from yesterday's close.

On the news front, media reports indicate that SK Hynix rejected funding proposals from U.S. tech giants in order to maintain its supply strategy independence.

Analysis from Yonhap News Agency suggests that the KOSPI's lower opening was primarily driven by two factors: first, a temporary pause in the rally of AI-driven chip stocks; and second, falling oil prices coupled with conflicting signals from peace negotiations between the U.S. and Iran, which weighed on market sentiment.

Japanese stocks also traded lower in the morning session, failing to sustain their previous momentum. The Nikkei 225 index opened down 197.19 points, or 0.3%. At the sector level, heavyweights were the primary drag, with export-oriented blue chips like Toyota and Sony generally seeing slight pullbacks.

On the macro front, U.S. stocks saw modest gains on Wednesday, with the S&P 500 rising 0.02% to 7520.36, the Nasdaq up 0.07% to 26674.73, and the Dow up 0.36% to 50644.28. However, President Trump subsequently expressed dissatisfaction with negotiations with Iran, sending conflicting signals that added uncertainty to Asian markets.

In currency markets, the USD/JPY fluctuated around the 159.5 level. The slight weakening of the yen provided some support to Japanese exporters, but it was not enough to reverse the overall downward trend.

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

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Reviewed byJay Qian
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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