What's New Since Our Last Report

South Korea's Kospi briefly breached the 8,000 level — a psychologically significant milestone — before pulling back, according to Business Insider. The index is now up more than 80% year-to-date.

Taiwan's Taiex has climbed roughly 12% in the past month alone and is up over 40% this year, per Business Insider.

Goldman Sachs Makes Its Biggest Call

Goldman Sachs has formally named South Korea its "highest conviction view" in Asia, according to Business Insider.

Tim Moe, Goldman's chief Asia-Pacific regional equity strategist, told CNBC that South Korean semiconductor stocks like Samsung Electronics and SK Hynix are trading at roughly five to six times this year's earnings and about four times next year's. His read: the market doesn't believe the profitability lasts long.

So Goldman is bullish while flagging the same valuation discount that suggests skepticism about lasting returns.

The Concentration Problem Just Got Worse

Samsung Electronics and SK Hynix together now represent a record 42.2% of the Kospi, according to Manulife Investment Management data cited by CNBC. That number reached a new high in May.

On the Taiwan side, TSMC — with a market cap of roughly 58 trillion Taiwan dollars ($1.85 trillion) — now accounts for more than 40% of the Taiex benchmark, per UOB data reported by CNBC.

June Chua, head of Asia equities at Manulife Investment Management, told CNBC: "Both indices have effectively become AI and semiconductor proxies."

North vs. South Asia: A New Divide

The AI rally is creating a hard split inside Asia itself.

Moe told CNBC's Exchanges podcast that markets like Indonesia and South Asia — which lack tech exposure and face energy vulnerability — are down 25% year-to-date. Meanwhile, North Asian markets with stronger fiscal buffers and tech exposure are seeing what Moe called "massive outperformance."

Tech makes up roughly 80% of Taiwan's index, 60% of South Korea's, and 30% of Japan's, according to Moe's figures. Countries without that exposure are getting left behind — and some face a "rude awakening" when energy supply shocks hit, Moe warned.

Why Asian Chipmakers Win Regardless of Who Wins AI

Stephen Li Jen, CEO of Eurizon SLJ Capital, made a sharp observation to Business Insider: Asian technology companies "are less at risk of having to select the ultimate 'winners'" in AI. They supply the chips, memory, and foundry capacity — no matter which AI company ends up on top.

American tech giants like Microsoft, Google, and Meta are burning massive capital expenditures building AI infrastructure. The companies selling them the hardware are collecting those dollars without taking the same execution risk.

What Could Break This

Moe named the specific vulnerabilities at CNBC: supply disruptions, political backlash against AI infrastructure, capital-market stress, and technological disruption from new chip designs.

That last one matters. If next-generation AI architectures require less memory bandwidth or shift away from current chip designs, Samsung and SK Hynix don't just slow down — they crater. And they take the Kospi with them.

Billy Leung of Global X ETFs told CNBC the unusual thing isn't that a reshuffle happened — it's the speed and the narrowness of the drivers. Normal top-10 market-cap reshuffles come from broad domestic booms or years of outperformance. This one came from a handful of companies in a single supply chain.

Concentration that builds fast can unwind fast.

The Geopolitical Layer

TSMC sits on an island that China claims as its own territory. Samsung and SK Hynix have major manufacturing operations inside China. The entire AI hardware supply chain for the Western world runs through a geography that is one military miscalculation away from catastrophe.

When analysts list geopolitical tensions as a risk factor, that often understates what is actually an existential scenario. The concentration risk isn't just financial. It's strategic.

Where This Stands

South Korea is up 80% in a year. Goldman loves it. The numbers are real. The rally has legitimate fundamentals behind it.

But a market where two companies equal 42% of the index — and both those companies sit inside a geopolitical flashpoint — represents a highly concentrated bet on AI spending holding up, chip demand not softening, and nothing going wrong in East Asia. All three of those conditions have to stay true simultaneously.