South Korea’s stock market climbed to a record high on Wednesday, propelled by a surge in semiconductor shares as investors doubled down on one of the global artificial-intelligence boom’s most important supply-chain bets: Korean memory chips.
The benchmark KOSPI index closed at 8,864.24, its highest level on record, as shares of SK Hynix soared to a fresh all-time high. The rally underscored how closely South Korea’s equity market has become tied to the fortunes of the AI industry, where demand for advanced memory chips continues to outpace supply.
SK Hynix, South Korea’s second-largest chipmaker and a critical supplier of high-bandwidth memory chips used in Nvidia-powered AI servers, jumped 5.84% to close at $1,652. The stock briefly climbed even higher during the session, extending a remarkable run that has transformed the company into one of the biggest winners of the global AI spending wave.
The gains came as investors increasingly bet that demand for AI infrastructure will remain strong despite concerns over interest rates, geopolitical uncertainty and signs of profit-taking in U.S. technology stocks.
Samsung Electronics, South Korea’s largest company and the world’s leading memory-chip producer, also advanced 1.02%, adding support to the broader market. Together, Samsung and SK Hynix occupy a central position in the global memory-chip industry, supplying components that have become essential to the expansion of data centers and AI computing systems.
The market’s rise was particularly notable because it occurred despite heavy foreign selling. Overseas investors sold roughly $1 billion worth of Korean stocks during the session, while domestic retail and institutional investors stepped in as buyers.
Analysts said investors remained cautious ahead of the U.S. Federal Reserve’s policy meeting and major derivatives expirations in U.S. markets. However, optimism surrounding potential diplomatic progress between the United States and Iran helped support demand for risk assets globally.
An analyst at Daishin Securities said the Korean market maintained its upward trajectory even as investors awaited signals from the Federal Reserve. Semiconductor stocks recovered from early losses and moved higher despite profit-taking pressure in U.S. chip shares, while shipbuilding companies also gained on expectations of stronger investment cooperation between Washington and Seoul.
The technology-heavy KOSDAQ market joined the rally, rising 1.30%. Biotechnology and robotics shares were among the notable gainers, reflecting broader investor appetite for growth sectors tied to technological innovation.
Yet the day belonged to semiconductor stocks. The KOSPI’s record close reinforced a trend that has become increasingly evident over the past year: South Korea’s market is no longer being driven primarily by domestic economic conditions but by its strategic role in the global AI ecosystem.
As companies around the world spend billions of dollars building AI infrastructure, investors are increasingly viewing South Korea not simply as an export-oriented economy but as a critical supplier of the hardware powering the next generation of computing. For now, that perception is helping push Korean equities to levels never seen before.
