South Korea’s equity market suffered a dramatic setback on Monday as investors rushed to reduce exposure to crowded artificial intelligence and semiconductor trades, triggering trading halts and raising questions about the sustainability of one of the world’s strongest stock market rallies, according to a report by Bloomberg.
The benchmark Kospi Index fell more than 8% shortly after the opening bell, prompting the Korea Exchange to impose a temporary 20-minute trading suspension designed to calm market volatility. Although the market later recovered some losses, the sell-off underscored growing investor unease over stretched valuations in technology-related stocks.
The decline follows months of exceptional gains driven largely by enthusiasm surrounding AI infrastructure spending and the dominant role played by Korean memory-chip manufacturers in the global semiconductor supply chain.
Market participants pointed to a combination of profit-taking, elevated positioning and broader risk-off sentiment across global technology markets as catalysts for the sharp move. Concerns over potential interest-rate increases in the US added further pressure after a weak session for US technology stocks at the end of last week.
South Korea’s market has become increasingly exposed to AI-related concentration risk, with semiconductor giants Samsung Electronics and SK Hynix accounting for a significant share of investor enthusiasm. Both stocks recovered from their session lows during trading, contributing to sharp intraday swings that have become increasingly common in the Korean market.
The Korea Exchange convened an emergency meeting to assess market conditions and discuss measures aimed at maintaining orderly trading as volatility intensified.
Despite the sell-off, investors continued to weigh positive developments for the sector. Recent announcements regarding collaboration between US AI leader Nvidia and SK Hynix on next-generation memory technologies have reinforced expectations of continued long-term demand growth for advanced semiconductor products.
Domestic policy support has also remained a factor. President Lee Jae Myung reiterated his view that Korean equities remain undervalued and continued to advocate for reforms aimed at improving shareholder returns and corporate governance.
The scale of recent volatility has been exacerbated by the growing popularity of leveraged exchange-traded funds tied to Korean semiconductor stocks.
Single-stock leveraged products linked to SK Hynix have attracted substantial retail investor flows both domestically and internationally. As market moves become larger, the daily rebalancing activity required by these vehicles can further amplify price swings in underlying shares.
At the same time, speculative activity has continued to build. Margin debt reached a record high at the end of May, highlighting the extent of leveraged participation in the rally.
Investors have increasingly sought protection against market turbulence. Korea’s options-based volatility gauge has traded at historically elevated levels relative to comparable US measures for much of the year, reflecting persistent concerns about downside risks despite the market’s strong performance.
While the abrupt correction rattled investors, several market strategists argued that the move should be viewed within the context of an extended bull market rather than as the start of a deeper downturn.
Strong capital expenditure commitments from hyperscale technology companies, continued AI infrastructure investment and robust earnings expectations for Korean chipmakers continue to support the fundamental case for the sector, they said.
Timothy Moe, chief Asia-Pacific equity strategist at Goldman Sachs, described the sell-off as a technical correction within a longer-term uptrend, noting that industry fundamentals remain supportive. The bank recently raised its target for the Kospi Index, reflecting its positive outlook for Korean equities.
Jung In Yun, chief executive of Fibonacci Asset Management Global, similarly argued that a period of consolidation following the market’s rapid ascent was both healthy and expected, particularly in AI and semiconductor-related stocks.
One source of concern remains the behaviour of overseas investors, who have continued to reduce exposure to Korean equities. Foreign investors extended their selling streak on Monday after withdrawing more than $10bn from the market on a net basis during the previous week.
Meanwhile, South Korea’s currency recovered from recent weakness after authorities announced measures aimed at supporting the won. Policymakers across Asia have increasingly focused on currency stability amid rising energy costs, a stronger US dollar and geopolitical tensions linked to the conflict involving Iran.
