South Korea’s Kospi, which had long stood out as one of the world’s hottest-performing markets over the past year, with a whopping 36% gain, hit a roadblock. The Kospi Index, which recently inched up 3% to its record high, tumbled as much as 13% on Wednesday. This dramatic sell-off follows a 7.2% decline in the previous session amid the escalating Middle East crisis.The sell-off was led by market heavyweights that had powered gains until last month, including Samsung Electronics, SK Hynix, and Hyundai Motor. Trading in both Kospi and Kosdaq shares was halted for 20 minutes after losses exceeded 8% and triggered the circuit breaker.The benchmark fell sharply as heavy selling in index heavyweights dragged the market lower after a prolonged AI-driven rally left valuations stretched. Rising oil prices amid Middle East tensions also dampened sentiment as the outlook for US Federal Reserve easing is uncertain and concerns for import-dependent South Korea continue to rise. At the same time, global investors moved to cut risk exposure, with foreign funds turning net sellers and retail participation weakening, while a spike in volatility intensified the sell-off.“Moves are too extreme so forecasting feels almost impossible – analysis doesn’t really help,” said An Hyungjin, chief executive officer at Seoul-based Billionfold Asset Management. “Retail investors seem to hesitate as well, bids are fading since yesterday. While we are picking quality names and hedging, this isn’t a clear opportunity,” Bloomberg cited the expert.

Kospi’s strong rally – Is it a pause or a turning point?

South Korea’s stock surge had been fuelled by the artificial intelligence boom, with the Kospi climbing nearly 50% this year at its peak. South Korea is the world’s eighth-largest crude consumer, making energy costs a key factor in market sentiment.Over the past year, South Korean equities often bucked regional trends, rising even on days when other markets fell. Strong demand for memory chips drove multi-fold gains in Samsung and SK Hynix, while government-led corporate reforms spurred a re-rating of the market.A further decline could test that resilience. Investors are now debating whether the recent turbulence signals a turning point or merely a pause before the market resumes its upward trajectory.“This reads like a positioning unwind more than a South Korea-specific fundamental break,” Dave Mazza, chief executive officer at Roundhill Investments told Bloomberg. “When global risk appetite turns and energy and foreign exchange volatility jump, you get fast de-risking in the biggest, most liquid index names.”Foreign investors were net sellers of Kospi stocks in morning trading, while retail and local institutional investors increased positions. The Kospi 200 Volatility Index, which tracks option prices, surged to its highest level since March 2020.

Safer segments

Not all sectors were hit. Defence stocks continued to rise amid expectations that instability in the Middle East will persist. LIG Nex1 and Hanwha Systems each climbed more than 25% at their intraday highs.“This may create select opportunities to build positions in companies and industries that are now trading at attractive prices,” said Park Sojung, a portfolio manager at Matthews Asia. “South Korean industrials such as defence and shipbuilding may again be highlighted as beneficiaries of global instability, constrained supply, and South Korea’s growing strategic importance.”In February, the South Korean benchmark had hit a fresh record high, rising 3% to close at 5,677.25. Before the Middle East crisis broke out, Goldman Sachs had predicted a bright rally ahead. “After nearly doubling in 2025, Korea is again the leading market in Asia Pacific…While many investors are asking if they should reduce positions after such strong performance, we think it is still too early.” The investment bank, as cited by CNBC, further forecasted 120% earnings growth for Korean equities in 2026.