South Korea's KOSPI plunged 10.84% on Tuesday, marking its steepest one-day decline in months as a global selloff in AI semiconductor stocks hammered the country's largest technology companies. The sharp drop came after investors dumped chipmakers amid concerns over artificial intelligence valuations and intensifying competition from China's semiconductor industry, according to Reuters.
The benchmark South Korean stock market index closed at 6,023.66, extending losses across Asia as investors reassessed the outlook for AI infrastructure spending following weeks of volatility in global technology stocks.
Why Samsung And SK hynix Dragged South Korea's KOSPI Lower
The biggest drag on the KOSPI came from South Korea's two largest semiconductor manufacturers. Samsung Electronics (KRX: 005930) and SK hynix (KRX: 000660), which together account for more than half of the benchmark index's market capitalisation, both suffered double-digit losses as investors reduced exposure to AI-related chip stocks.
According to Reuters, SK hynix plunged 14.7%, while Samsung Electronics fell 14.4%. Foreign investors sold approximately 5 trillion won worth of shares during the session, while domestic retail investors purchased roughly 4 trillion won, partially offsetting the selling pressure.
Investor sentiment was also shaken by the recent market debut of Chinese memory-chip manufacturer ChangXin Memory Technologies (CXMT), whose blockbuster initial public offering has fuelled concerns that China's semiconductor industry is becoming a stronger competitor in the global memory-chip market.
China's Chip Industry Adds Pressure To AI Semiconductor Stocks
Concerns over China's rapidly advancing semiconductor capabilities have added fresh uncertainty to the outlook for global memory-chip makers. Reuters said that investors fear Chinese manufacturers could narrow the technology gap with established industry leaders faster than previously expected, increasing competitive pressure on South Korean chipmakers.
The latest concerns come as governments worldwide continue investing heavily in domestic semiconductor production, reshaping the competitive landscape for advanced memory and AI chips.
Global AI Chip Selloff Hits Asian Stock Markets
The AI chip selloff extended well beyond South Korea as Japan's Nikkei 225 and Taiwan's stock market also posted sharp declines as semiconductor stocks tracked weakness across global technology shares. Investors have become increasingly cautious after months of exceptional gains driven by enthusiasm surrounding AI data centres, advanced processors and high-bandwidth memory (HBM) chips.
Although demand for AI hardware remains strong, markets are increasingly questioning whether the enormous capital spending by cloud providers and chipmakers can continue at its current pace. Tuesday's decline highlights how quickly market sentiment can shift in sectors that have benefited from strong AI-driven rallies.
While semiconductor companies continue to enjoy long-term demand from artificial intelligence, cloud computing and advanced data centres, investors are becoming more selective as valuations climb and competition intensifies.
Upcoming earnings reports from major semiconductor companies are expected to provide fresh insight into:
- AI infrastructure spending by hyperscale cloud providers.
- Demand for high-bandwidth memory (HBM) chips.
- Pricing trends in DRAM and NAND memory.
- Capital expenditure plans from leading chip manufacturers.
- The outlook for AI-related revenue growth.
Frequently Asked Questions
Why did South Korea's KOSPI fall?
South Korea's KOSPI fell after investors sold semiconductor stocks amid concerns about AI valuations, rising competition from Chinese chipmakers and weakening sentiment across global technology markets.
Why did Samsung Electronics and SK hynix shares decline?
Samsung Electronics and SK hynix were hit by heavy selling as investors reduced exposure to AI semiconductor stocks and reassessed the long-term outlook for memory-chip demand.
What is the KOSPI?
The Korea Composite Stock Price Index (KOSPI) is South Korea's benchmark stock market index. It tracks the performance of many of the country's largest publicly traded companies, including Samsung Electronics and SK hynix.
What are investors watching next?
Markets are closely watching upcoming earnings from major semiconductor companies, AI infrastructure spending trends, demand for high-bandwidth memory chips and developments in China's semiconductor industry, all of which could influence the next move in global technology stocks.