South Korea's stock market has been on a remarkable run. Earlier this year, it edged out the UK to become the world's eighth-largest stock market, with the combined value of its listed companies surpassing $4 trillion. That's a stunning turnaround: just a year and a half earlier, the UK market was roughly double the size of South Korea's.
What's behind this sprint? Two forces are at work: a powerful position in the global artificial intelligence supply chain, and a concerted push to improve corporate governance and shareholder returns. Together, they're chipping away at the so-called 'Korea discount'—the longstanding tendency for Korean stocks to trade at lower valuations than their global peers—and making the market increasingly difficult for international investors to ignore.
At the heart of the AI boom
South Korea has become a linchpin in the AI supply chain. The country is home to some of the world's leading semiconductor manufacturers, producing the high-end memory chips (like HBM, or high-bandwidth memory) that are essential for AI data centers and advanced computing. As demand for AI infrastructure has exploded, so has the value of these companies—and the broader market.
This isn't just about one sector. The AI boom has lifted the entire Korean market, drawing global investors who want exposure to the technology's growth. The country's tech giants have become household names in the investing world, and their fortunes are now closely tied to the AI cycle.
But there's more to the story than chips alone. South Korea has also been working to address the structural issues that have long held back its market.
Reforms target the 'Korea discount'
For years, Korean stocks traded at a discount compared to similar companies in other developed markets. The reasons were well-known: opaque corporate governance, low dividend payouts, and a tendency for conglomerates (known as chaebols) to prioritize growth over shareholder returns. This 'Korea discount' made many investors wary.
Now, that's changing. South Korean authorities and companies have been pushing reforms aimed at improving corporate governance and boosting shareholder returns. These efforts include encouraging higher dividends, more transparent management, and better treatment of minority shareholders. The goal is to make Korean stocks more attractive to global investors—and it appears to be working.
As these reforms take hold, the discount is narrowing. That means even if earnings stay flat, the market could see further gains simply from re-rating—investors being willing to pay more for the same earnings because they trust the companies more.
What it means for investors
For everyday investors, the rise of South Korea's market is a reminder that global opportunities go beyond the usual suspects. The country's combination of AI exposure and improving corporate behavior makes it a unique play on two powerful trends.
However, it's important to keep perspective. The market's rapid rise also means valuations have climbed, and AI-related stocks can be volatile. As with any investment, there are risks: the AI cycle could cool, global trade tensions could disrupt supply chains, and reforms may not deliver as quickly as hoped.
Investors should also consider the broader context. Global markets are currently sensitive to interest rates and economic data—for instance, the dollar has held steady as investors await key US jobs data, and stocks have been steady as oil slips and bond stress eases. These factors can influence how much risk investors are willing to take in markets like South Korea.
For those looking to diversify internationally, South Korea offers a way to tap into the AI boom without concentrating solely in US tech giants. But it's not a one-way bet. The market's fate is tied to global tech demand, and its reforms are still a work in progress.
Still, the shift is significant. A market that was once seen as a laggard is now a global heavyweight. As the reforms continue and AI demand persists, South Korea could become an even more important part of the global investing landscape.
For now, the message is clear: the 'Korea discount' is fading, and the world is taking notice.
