Asia’s trillion-dollar titans are powering — and distorting — its quickest rising stock markets

Taiwan Semiconductor Manufacturing Co. (TSMC) signage on the bottom of the Unique York Stock Substitute (NYSE) in Unique York, US, on Friday, Jan. 2, 2026.

Michael Nagle | Bloomberg | Getty Photos

As South Korea’s and Taiwan’s benchmark indexes surged to story highs this yr — powered by Asia’s trillion-dollar titans — it has raised considerations that their rallies are turning into dangerously dependent on a handful of synthetic intelligence winners.

South Korea’s Kospi index has surged extra than 80% this yr, hitting one new high after one other, whereas Taiwan’s Taiex has additionally many cases posted new records as merchants piled into the semiconductor change at the center of the AI bid.

“In a observe, it’s miles the AI hardware theme that is clearly what is propelling things,” Goldman Sachs strategist Tim Moe advised CNBC.

Taiwan is “well over 80%” exposed to AI-linked earnings streams whereas South Korea stands around 60%, he acknowledged, as hovering are looking ahead to for memory chips and superior semiconductors fuels an unheard of earnings bid.

The focus is staggering. Taiwan Semiconductor Manufacturing Company, which has a market cap of around 58 trillion Taiwan greenbacks ($1.85 trillion), now accounts for added than 40% of Taiwan’s benchmark Taiex index, fixed with UOB. 

In South Korea, Samsung Electronics and SK Hynix together made up a story 42.2% of the Kospi in Might maybe well also honest, fixed with Manulife Funding Management. Samsung Electronics’ market capitalization pushed past $1 trillion final week as merchants persisted to race AI-linked stocks. 

Shares of TSMC within the past yr

The focus has made both markets extremely exposed to the enviornment AI spending cycle. But it with out a doubt additionally methodology index-stage good points would possibly per chance maybe per chance per chance affirm less about huge home energy than about the earnings energy of a narrow team of exporters.

Analysts warned that reliance on a narrow team of exporters would possibly per chance maybe per chance per chance increase volatility and leave markets susceptible to shocks ranging from geopolitical tensions to a slowdown in records-middle spending.

“There absolutely is chance with market focus,” Goldman’s Moe acknowledged, pointing to vulnerabilities ranging from present disruptions and political backlash in opposition to AI infrastructure to capital-market stress and technological disruption from new chip designs.

One immediate chance stems from the AI present chain itself. Taiwan and South Korea take a seat at the coronary heart of a producing ecosystem reliant on specialized chemical compounds, mild-lovely movies is called photoresists and gases that can per chance per chance per chance be affected at some stage in geopolitical tensions or disruptions to world shipping routes.

“Whilst you correct can’t accumulate them, and therefore you would possibly per chance cease your production, it would possibly per chance per chance per chance not rob a genius to reflect that the stocks would appropriate,” Moe acknowledged.

Moreover, Taiwan and Korea are tremendous energy importers, that methodology better oil costs from Heart East tensions would possibly per chance maybe per chance per chance wretchedness their procuring energy and international competitiveness, at the same time as AI are looking ahead to boosts exports.

Jamie Mills O’Brien, funding director at Aberdeen Investments, acknowledged both markets “take a seat on the disagreeable facet of the phrases of change as tremendous energy heed importers,” in particular at a time when oil costs are rising sharply resulting from the Iran battle.

One more chance is the sheer scale of expectations now embedded in valuations. The AI frenzy has already pushed Asian tech earnings sharply better, with Goldman estimating that South Korean earnings bid would possibly per chance maybe per chance per chance surge 300% this yr.

“Korea and Taiwan equity markets have continuously been extra a mirrored image of world are looking ahead to, given the overwhelming majority of listed equities are exporters, pretty than home are looking ahead to,” acknowledged Mixo Das, JPMorgan’s head of Korea and Taiwan equity approach. “This remains the case; it’s simply that world are looking ahead to has turn into very concentrated in AI within the within the meantime.”

While Taiwan and South Korea’s hovering equity benchmarks would possibly per chance maybe per chance per chance seek for same on the bottom, Goldman’s Moe acknowledged that the extent to which they reflect their broader economies is an increasing number of diverging.

South Korea’s market aloof captures a pretty huge swathe of the home financial system despite the dominance of chipmakers equivalent to Samsung Electronics and SK Hynix. Previous semiconductors, merchants are additionally piling into sectors tied to shipbuilding, defense, energy instruments and even the “K-culture” change, serving to scheme the rally extra reflective of Korea’s wider industrial disagreeable.

“The market is mainly deeper and broader and has extra opportunities than correct the significant particular person memory stocks,” Moe acknowledged. Korea’s equity good points are better aligned with broader financial energy, alongside with stable exports and swelling contemporary-story surpluses, he added.

Taiwan’s market, in distinction, has turn into an increasing number of tied to TSMC and to world semiconductor are looking ahead to, making it an increasing number of aloof from the home financial system, Moe acknowledged.

Some merchants additionally fear that markets are turning into overly reliant on a single theme continuing indefinitely.

“There is totally well-known crowding within the AI thematic all the device in which thru world equities,” acknowledged JPMorgan’s Das. Reckoning on how broadly AI exposure is measured, “40% to 45% of the S&P 500 is AI-linked,” with even better phases in Taiwan and Korea, he acknowledged.

UOB’s chief funding officer Qi Wang warned that Taiwan’s rising reliance on TSMC would possibly per chance maybe per chance per chance create prolonged-term distortions to both the financial system and the market.

“Some of us affirm Taiwan is correct a one-trick pony. That’s correct TSMC,” Wang acknowledged. “Longer term, it does lengthen the focus chance for both the financial system and the stock market.”

Taiwan’s regulators not too prolonged within the past relaxed limits on how mighty home funds can allocate to a single stock, a switch widely viewed as benefiting TSMC. Wang estimated the trade would possibly per chance maybe per chance per chance pronounce $30 billion to $40 billion into the chipmaker on my own, potentially reinforcing the very focus risks policymakers are making an are trying to own an eye fixed on.

Thoroughly different strategists argue the comparison with totally different extremely concentrated markets is overstated because semiconductors rely on sprawling industrial ecosystems pretty than a single commodity or product.

Mute, history provides cautionary tales. Denmark and Saudi Arabia, two markets carefully dependent on a single corporate champion, had been amongst the enviornment’s weakest-performing stock markets at the discontinuance of final yr. 

Denmark’s market slumped as considerations mounted over the slowing are looking ahead to for obesity medication made by Novo Nordisk, whereas Saudi Arabia’s equity market, dominated by Saudi Aramco, struggled when oil costs fell. Saudi stocks have since clawed abet some ground amid the most in model rebound in vulgar costs.

The lesson for merchants is that focus will possible be self-reinforcing at some stage in bull markets, till sentiment changes. Florian Weidinger, chief executive officer of Santa Lucia Asset Management, warned that many world merchants seeking diversification would possibly per chance maybe per chance per chance unknowingly be doubling down on the same AI change by procuring both U.S. megacap technology stocks and Asian benchmarks dominated by semiconductor giants.

“If that had been to interrupt,” he acknowledged, “pretty a few allocators will wake up with double chance.”