South Korean Markets Face AI Bubble Fears as Kospi Enters Technical Bear Market

South Korea's primary stock market index, the Kospi, has entered a technical bear market, signaling growing investor apprehension about a potential artificial intelligence (AI) bubble. This downturn follows a period of significant gains fueled by the booming demand for AI-related technologies.

The Kospi's performance is heavily influenced by two major companies, SK Hynix and Samsung, which together constitute approximately half of the index. Both firms have experienced substantial share price increases driven by the high demand for their high-bandwidth memory (HBM) chips, essential components for AI data centers. Along with U.S. company Micron, these South Korean firms are leading suppliers of these advanced memory chips, commanding significantly higher prices from customers.

Despite expectations of substantial profit increases, such as Samsung's forecast of a 19-fold rise in second-quarter profits, the market has reacted with a $100 billion reduction in market value. SK Hynix shares also declined in tandem.

Several risks are associated with companies in the memory chip sector. These include potential backlash against new data centers, shortages of critical materials like helium—supplies of which have been affected by geopolitical conflicts—emerging competition from China, and the rapid pace of technological innovation that could lead to obsolescence. These factors contribute to the nervousness observed in the market.

The situation in South Korea serves as a cautionary tale for private investors globally, including those in the UK. The Bank of England has also flagged increasing risks in the market, noting a significant rise in borrowing by hedge funds using shares as collateral, which is often viewed as an indicator of market exuberance.

Private investors in the UK may be exposed to AI-related market fluctuations through their pensions, investment trusts, and other funds, sometimes without direct awareness. The integration of companies like Elon Musk's SpaceX into major indices, such as the Nasdaq 100, means they are automatically included in tracker funds, further broadening investor exposure.

While the Kospi index remains up for the year and the shares of its largest constituents have also seen gains, with experts predicting strong demand for HBM chips for at least the next couple of years, a watchful approach is advised for investors. The recent market movements underscore the volatility and potential risks associated with rapid technological booms.