South Korea’s stock market suffered a broad selloff as semiconductor shares plunged despite Samsung Electronics reporting the strongest quarterly operating profit in its history.
The benchmark KOSPI index fell approximately 8%, while the decline spread across major AI chip manufacturers throughout Asia. Investors sold semiconductor stocks even after Samsung announced preliminary second-quarter operating profit of 89.4 trillion won, or roughly $58.4 billion, representing a 19-fold increase from a year earlier.
The sharp market reaction surprised investors, as the earnings report reflected continued strength in global demand for AI-related memory chips.
Chip Stocks Lead Market Decline
Samsung shares dropped around 9% following the earnings release, while rival SK Hynix fell roughly 11%.
The weakness extended beyond South Korea. Japan’s Nikkei declined about 2%, Murata Manufacturing lost roughly 8%, and Taiwan’s MediaTek fell around 3%.
U.S.-listed Micron Technology also declined approximately 6%, highlighting broader concerns across the global AI semiconductor sector.
The coordinated decline suggests investors were focused less on recent earnings and more on valuation concerns after an extended rally in AI-related stocks.
Record Earnings Fail to Lift Sentiment
Samsung’s preliminary results highlighted the continued strength of the AI infrastructure market.
Demand for high-bandwidth memory (HBM) chips and other advanced semiconductors has remained exceptionally strong as cloud providers and technology companies continue investing heavily in artificial intelligence infrastructure.
The record operating profit underscores Samsung’s recovery following the semiconductor downturn of previous years.
However, analysts noted that much of the positive news may have already been reflected in share prices after the sector’s powerful rally over the past year.
With semiconductor valuations remaining elevated, investors appeared to use the earnings release as an opportunity to lock in profits rather than increase exposure.
AI Supply Chain Under Pressure
The selloff affected companies throughout Asia’s semiconductor ecosystem, from memory manufacturers to component suppliers and chip designers.
The move illustrates how closely linked AI-related stocks have become, with weakness in one segment quickly spreading across the broader supply chain.
Recent warnings from several market strategists, including concerns that AI semiconductor valuations resemble previous technology bubbles, have also contributed to growing caution among investors.
The broader takeaway is that strong earnings are no longer sufficient to guarantee higher share prices in the AI sector. As valuations climb, investors are increasingly demanding not only record financial results but also evidence that future growth can continue to justify premium market multiples.
