South Korea’s financial markets entered a state of paralysis on Monday as the Kospi index plummeted 8.8%, marking one of the most violent sessions in the country's recent history. The rout, which triggered automatic circuit breakers to halt trading, effectively wiped out months of speculative gains fueled by the global artificial intelligence boom. At its lowest point, the index had retreated nearly 15% from its recent peak, signaling a sharp transition into a technical correction phase.
The carnage was concentrated in the semiconductor heart of the Korean economy. Samsung Electronics, the world’s largest memory chipmaker, saw its shares dive as much as 11%, while its rival SK Hynix—a critical supplier to the global AI ecosystem—tumbled by 10%. This sudden reversal reflects a growing consensus among institutional investors that the premium placed on AI-related hardware may have significantly outpaced actual near-term earnings potential.
Foreign capital is fleeing the peninsula at a record pace, with data showing a net sell-off exceeding $10 billion in just one week. This exodus has exerted immense pressure on the Korean Won, which crashed to its weakest level against the U.S. dollar since the height of the global financial crisis in March 2009. The currency’s instability is complicating the policy response for the Bank of Korea as it balances inflationary pressures against the need to support a wobbling equity market.
While the Kospi remains up approximately 77% since the start of the year, the magnitude of the recent drop suggests that the ‘AI trade’ is undergoing a painful deleveraging process. Analysts point to a perfect storm of macroeconomic uncertainty, a fundamental repricing of interest rate expectations, and aggressive profit-taking. As the Korea Exchange holds emergency meetings to stabilize the market, the ripple effects are expected to be felt across global tech supply chains.