The AI boom is reshuffling the global stock market pecking order, with South Korea and Taiwan emerging as surprise contenders. These markets have surged past long-established Western bourses, challenging the dominance of traditional powerhouses like Canada and the U.K. This rapid ascent is particularly intriguing due to its narrow focus on AI-linked firms, with TSMC and Samsung Electronics dominating Taiwan and South Korea's markets respectively. While this concentration of market power is unprecedented, it raises questions about the stability of these gains and the potential risks associated with such heavy exposure to a few key stocks. The AI hardware theme is clearly driving this phenomenon, creating a supply shortage that is boosting pricing power for chipmakers. However, this concentration risk is prompting comparisons with markets like Saudi Arabia and Denmark, where benchmark indexes are heavily dominated by a single company. As the AI boom continues to shape the global economy, it will be fascinating to see how these markets evolve and whether their recent surge can be sustained in the long term.