Korean Shares Plunge Despite Wall Street's AI Rebound as Investors Lock in Gains

South Korea's Kospi index plunged as much as 8% on Thursday before closing 4.9% lower, even as Wall Street rallied on the back of strong AI stocks, according to Post Register. The sharp drop came despite blockbuster earnings from Samsung Electronics, whose shares still fell 7.7% on the day.
Meanwhile, Wall Street told a very different story. The Nasdaq rose 1.1% to 26,121.16, powered by AI-related stocks. The Dow Jones hit a record 53,055.91, up 0.3%. The S&P 500 climbed to 7,537.54, putting it within 1% of its all-time high, Idaho State Journal reported.
Samsung Electronics posted stunning Q4 results. Its operating income surged 19-fold to 89.4 trillion won, or about $58.7 billion. Revenue more than doubled over the same period. By any measure, the numbers were impressive, Idaho Press reported.
Yet the market shrugged. Samsung shares still dropped 7.7%. Analysts say foreign investors used the strong earnings as a chance to lock in recent gains. Portfolio rebalancing — shifting money out of winners to reduce risk — also played a role, according to Lancaster Online.
The Kospi's wild ride was one of the day's biggest market stories. The index dropped as much as 8% during trading. It then clawed back some losses to close at 7,656.31, down 4.9%, Express News reported. That is still a steep single-day loss for a major market index.
The selloff hit the broader Asian market too. Shares across the region fell as investors pulled back. The Korean drop was the steepest, but it was not an isolated event, Record Eagle noted.
While Asia struggled, AI-linked stocks powered a strong day on Wall Street. The Nasdaq composite gained 1.1%, closing at 26,121.16. The S&P 500 reached 7,537.54. That puts it just under 1% away from its all-time peak, according to SM Daily Journal.
The Dow Jones Industrial Average rose 0.3% to 53,055.91. That was a new record close for the index. The AI sector has been a key engine of market growth, lifting tech-heavy indexes even as other parts of the market struggled, Yakima Herald reported.
The gap between strong earnings and falling stock prices points to a clear trend. Foreign investors are cashing out. When stocks have run up sharply, good news can still trigger selling. Investors take profits while prices are high, regardless of the underlying results, Daily Advance reported.
This pattern is common in fast-moving markets. A company can beat every target and still see its stock fall. Samsung's case is a textbook example. The earnings were record-breaking. The stock still dropped nearly 8% at its worst point of the day, according to Idaho Press.
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