AI Investors Bet on Taiwan's Diversified Supply Chain vs Korea's 7.4% EPS Miss

The AI investment narrative is maturing: no longer is all semiconductor exposure created equal. The abrupt $7.9 billion flow divergence between Taiwan and Korea signals that sophisticated AI investors are now scrutinizing which parts of the hardware stack can sustain earnings growth without the boom-bust cycles of memory chips. Taiwan's TSMC-led supply chain — spanning logic, advanced packaging, and testing — is being reclassified as a core, long-duration AI asset, while Korea's DRAM and NAND leaders are getting repriced for cyclical risk.

Global investors are turning decisively toward Taiwanese equities and away from South Korean stocks in the wake of July's AI-driven selloff, with fresh capital flows highlighting a strategic pivot toward stability and earnings reliability. According to Bloomberg data, foreign investors ended a six-week selling streak in Taiwan last week, becoming net buyers, and have poured a net $1.7 billion into Taiwanese shares so far in August. Over the same period, South Korea has suffered net outflows of $6.2 billion. This stark divergence — a swing of nearly $8 billion between the two markets in just over a week — marks a significant reassessment of the Asia AI investment landscape.

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In July, Taiex company earnings estimates rose 9.5%, compared with a 7.4% increase for the Kospi.

The shift comes as both markets, which had been neck-and-neck as the region's best performers with gains exceeding 50% year-to-date, navigate uncertainty over the payoff from massive AI capital spending. South Korea, home to memory chip giants Samsung Electronics and SK Hynix, has historically benefited from cyclical booms in NAND and DRAM demand fueled by AI server buildouts. However, that very cyclicality is now seen as a liability after the July rout, which was triggered by doubts about whether AI infrastructure spending will generate commensurate returns. In contrast, Taiwan's broader and more diversified tech hardware ecosystem — anchored by TSMC's foundry dominance and encompassing everything from packaging to testing to component manufacturing — is being rewarded for its perceived earnings steadiness and lower correlation to leveraged trades.

Earnings revision trends underscore this changing sentiment. For the first time in nearly a year, forward 12-month EPS estimates for the Taiex index were revised upward more aggressively than those for Seoul's Kospi. In July, Taiex company earnings estimates rose 9.5%, compared with a 7.4% increase for the Kospi. While both are robust, analysts are now betting that Taiwan's tech complex can sustain momentum better than Korea's memory-focused sector, which is prone to sharp inventory corrections. Warren Chiang, a portfolio manager at Grantham Mayo Van Otterloo & Co., articulated this view, noting that Taiwanese companies are "very, very high quality" and that the market, while moving with the global economy, is "not excessively risky from a fundamental sense." He highlighted Taiwan's ubiquity in consumer electronics: "Everything in your iPhone, every part comes from Taiwan."