Corporate Strategy × Tariff Volatility — March 2026
US-EU-China Tariff Escalation & Yuan Oil Settlement Shift, March 2026
Executive Summary
The US-EU-China tariff escalation entered a critical phase in mid-March 2026. EU Phase 1 retaliatory tariffs ($28B) take effect April 1, with a broader EUR 93B package under preparation. Trump's 25% baseline "reciprocal tariffs" and auto-specific tariffs effective April 2 have pushed the US effective tariff rate to its highest level since 1909. Iran's announcement of oil sales in yuan (March 12) adds a dollar-hegemony dimension that corporate treasury functions are not yet pricing. Yale Budget Lab estimates $2,100–$3,800 in annual cost increases per US household.
sUI Score: 0.74 (HIGH) — Elevated uncertainty driven by conflicting signals: high-probability near-term pain (A1 at 85%, A3 at 90%) against low-probability de-escalation (A5 at 40%). Corporate strategy teams face asymmetric downside.
7 validated for robustness against alternative scenarios actions inside. Each action references the probability assumptions that govern its urgency.
7 Actions Inside
A1 at 85% means EU Phase 1 tariffs take effect April 1, and A3 at 90% means suppliers are already repricing today — not waiting for April 1. Every day without a categorized exposure map is a day of blind renegotiation.
Full details — What, Why Now, and adversarial warnings — inside the report.
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