This is Post 9 of 16 in the Taiwan Risk Series. Full series at polarismng.com

KPI #9 — The Chip Factory Moving to Arizona Is Weakening Taiwan’s Best Shield

Advanced Chip Production Outside Taiwan

What it measures: The percentage of sub-3nm advanced chips manufactured outside TSMC’s Taiwan facilities — specifically at TSMC Arizona, Samsung Texas, Intel Ohio, and equivalent European Union investments.

This KPI has a logic that runs counter to intuition, and it is worth pausing on.

Taiwan’s most powerful protection against Chinese military action has never been its armed forces. It has been its irreplaceability. TSMC produces approximately 90% of the world’s most advanced chips. Apple, Nvidia, AMD, Qualcomm — the companies that power the global technology economy — all depend on Taiwan’s fabs. An invasion that damages or captures TSMC is an invasion that cripples the global economy. That economic reality is Taiwan’s “silicon shield.”

The CHIPS and Science Act, the European Chips Act, and TSMC Arizona are designed to reduce Western dependency on Taiwan — which is rational risk management from a supply chain perspective. But there is a second-order effect: as Western chip independence increases, the economic deterrent against invasion weakens. The day the US can produce 30% of its own advanced chips domestically is also the day Taiwan’s silicon shield loses some of its protective value.

TSMC Arizona fabs are years from full production. The shield is intact for now. But this KPI has a direction — and the direction matters.

Current status: 🟢 Green. TSMC still produces ~90%+ of the world’s advanced chips. CHIPS Act facilities are years from full production. The silicon shield remains largely intact — for now.

📍 Next in the series

KPI #10 — Xi Is 72, the Congress Is in 2027, and There Is No Successor. The political clock KPI — and why it connects directly to the first quantified consequence: a -10% global GDP shock.

⚡ The consequence to watch

Track TSMC Arizona production ramp milestones. Each time a new fab reaches volume production, note the date. That date also marks a small but real reduction in Taiwan’s deterrence value — which is not a reason to oppose chip relocalisation, but it is a reason to track it on your risk dashboard.

🔧 The drill

If your business is semiconductor-dependent, model two scenarios: (a) Taiwan supply intact but restricted, (b) TSMC Arizona at 20% of your current Taiwan sourcing. The gap between those two scenarios is your exposure to this KPI transition.

Sources: Efficio Consulting analysis (2024); CHIPS Act legislative text; AEI (2024). Full series: polarismng.com