AI Reshuffles Global Stock Market Rankings as Taiwan and South Korea Surge Past Western Rivals

CNBC reported Tuesday that the global stock market rankings are being rapidly redrawn by the AI boom, with Taiwan and South Korea displacing long-established Western markets from positions they held for decades.

AI Hardware Demand Powers an Asian Market Surge

According to HSBC data cited by CNBC, Taiwan has climbed to become the world’s sixth-largest equity market, overtaking Canada. South Korea has moved into eighth place, pushing the United Kingdom down the table. Just two decades ago, both countries ranked outside the top ten. Taiwan’s market was valued near $500 billion in 2004 and has since grown to roughly $4.7 trillion. South Korea has expanded from around $400 billion to approximately $4.4 trillion over the same period.

The driver is stark. Both markets have become heavily concentrated proxies for AI and semiconductor exposure. TSMC now accounts for more than 40% of Taiwan’s entire market capitalisation. Samsung Electronics and SK Hynix together represent a record 42% of South Korea’s benchmark Kospi index.

Tim Moe, Goldman Sachs’ chief regional equity strategist for Asia-Pacific, told CNBC the shift toward agentic AI has sparked surging demand for processing capacity, creating a supply squeeze that hands extraordinary pricing power to chipmakers. That dynamic is the central force lifting both markets.

A Reshuffling With Historical Precedent, but Unusual Speed

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Global market hierarchies do shift over time. China broke into the top tier in the late 2000s, and India briefly surpassed Hong Kong in late 2023 before slipping back. But analysts note the current moves stand out for their pace and narrow foundation.

Billy Leung, global investment strategist at Global X ETFs, told CNBC that such reshufflings typically unfold over many years, driven by broad domestic growth or large IPO waves. The speed here, and the fact that it rests on a handful of stocks, makes it unusual.

Concentration Risk Could Cap Further Gains

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The narrow base of the rally carries visible risks. South Korean equities experienced sharp swings last week after foreign investors sold roughly $13 billion worth of local shares in a compressed timeframe. Samsung’s stock has also whipsawed amid labour negotiations and strike concerns.

Herald van der Linde, HSBC’s Asia-Pacific head of equity strategy, warned that many Asian portfolios now face concentration risk from overexposure to a small number of names. He noted parallels with Saudi Arabia’s Aramco-driven market and Denmark’s dependence on Novo Nordisk, both of which suffered sharp selloffs when their anchor stocks came under pressure.

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