⚠ Taiwan Concentration & Geopolitical RiskHigh threat

The single largest risk in the entire TSMC story is not competitive or cyclical but geographic and geopolitical: the overwhelming majority of the world's most advanced chips are manufactured on the island of Taiwan, which China claims as its own and has vowed to bring under control, by force if necessary. TSMC's crown-jewel fabs — the leading-edge plants that make the chips the global economy and the AI revolution depend on — are concentrated in Taiwan, within range of the most dangerous unresolved conflict in the world. No moat, however wide, can wall out this risk, and it is the reason TSMC's stock trades at a visible discount to peers of comparable quality.

The concentration cuts in paradoxical directions. On one hand, it is Taiwan's 'silicon shield': the world's dependence on TSMC gives the United States and others a powerful incentive to defend the island and deters China from an attack that would devastate the global economy and destroy the very prize it sought. On the other hand, that same indispensability makes TSMC and Taiwan a chokepoint the great powers obsess over — the object of export controls, diplomatic pressure, and a scramble to reduce dependence — and it means that any serious escalation in the Taiwan Strait, from blockade to conflict, would strike at the heart of the world's technology supply chain and at TSMC directly. The range of outcomes runs from continued uneasy stability to catastrophe, and the tail risk, however low its probability in any given year, is uniquely severe: a genuine conflict over Taiwan would be a calamity for TSMC and for the world.

TSMC and its customers and their governments are responding the only way they can — by diversifying manufacturing away from Taiwan, at enormous cost. TSMC is building fabs in Arizona (where it has now committed a staggering $265 billion of planned US investment¹), Japan, and Germany, driven by a mix of customer demand, government subsidy, and the strategic imperative to spread the risk. But this diversification is expensive and dilutive: overseas fabs cost far more to build and run than those in Taiwan, at lower yields and without the dense local ecosystem, and TSMC has warned they will weigh on its margins for years. And even the vast Arizona build-out will, for the foreseeable future, leave the most advanced production and the bulk of capacity in Taiwan. The asset register shows it: Taiwan's share of TSMC's noncurrent assets fell from 95.9% in 2021 to 77.2% in 2024 and then rose again, to 80.0% in 2025², and in July 2026 the company said it is building 13 more leading-edge and advanced-packaging fabs on the island³. So the geopolitical risk cannot be engineered away in any reasonable timeframe; it can only be gradually, expensively reduced. An investor in TSMC owns the finest manufacturing franchise in the world's most important industry — and, inescapably, a concentrated bet on the peace and stability of the Taiwan Strait. That is the permanent asterisk on the whole thesis, the one risk that dwarfs all the others, and the reason a wide-moat monopoly-like business trades where it does rather than far higher.