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South Korean Stocks Face Another Bloodbath: Kospi Tumbles 4%, Samsung and SK Hynix Slump Over 3%

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AuthorBlock Tao
Jul 20, 2026 7:08 AM

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The KOSPI Index plunged 4.46% on July 20, closing at 6,516.28 amid intense panic selling and programmatic liquidations. Tech heavyweights led the decline; Samsung Electronics fell 3.73% to 245,500 won, while SK Hynix dropped 3.64% to 1,775,000 won despite brief intraday support. The widespread deleveraging highlights significant vulnerability in the Asia-Pacific semiconductor sector. With Japanese markets reopening tomorrow following the Marine Day holiday, analysts anticipate a difficult catch-up session as futures indicate ongoing downward pressure. Investors remain cautious as key psychological levels are tested across regional indices.

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TradingKey - KOSPI Index tumbles over 4% as Samsung Electronics and SK Hynix both fall over 3%, once again giving up key levels.

In Asian trading on July 20, South Korean stocks ultimately failed to sustain the brief, volatile rebound seen in the morning session, instead capitulating all the way to the close under relentless afternoon pressure from panic selling and programmatic sell orders. The KOSPI Index ultimately plunged 4.46% to close at 6,516.28 points, testing the 6,500 mark once again.

kospi-12c8d5495e91448cbc7dcc10dbb3bddcKOSPI Index chart, Source: TradingView

South Korean heavyweight stocks retreated across the board, with tech giants continuing to serve as cash sources. Samsung Electronics faced indiscriminate capital sell-offs, closing down 3.73% to once again drop below the 250,000 won mark and settle at 245,500 won, a new low since May 6. Meanwhile, although SK Hynix put up a brief resistance during intraday trading as a massive premium on its US ADRs triggered some overseas ETF substitution buying, it was ultimately dragged lower in late trading by the market-wide deleveraging tsunami, closing 3.64% lower to once again fall below the 1.8 million won mark and finish at 1,775,000 won.

Japanese markets were closed today for the 'Marine Day' holiday, escaping today's second wave of heavy losses in the Asia-Pacific semiconductor sector. However, given that semiconductor-heavy markets such as South Korea and Taiwan remained extremely weak on Monday, and with Nikkei futures on the Osaka Exchange (OSE) continuing to face pressure in after-hours trading today, the Japanese stock market is expected to face a grueling catch-up selling test when it resumes trading tomorrow.

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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