Will headline CPI YoY exceed 4.0% by June 2026?
The Condition
Strait of Hormuz sustained disruption (>50% traffic reduction for 14+ days) before June 30, 2026
Our Ensemble Estimates
Given Hormuz sustained disruption: Will headline CPI YoY exceed 4.0% by June 2026?
Given Hormuz reopens: Will headline CPI YoY exceed 4.0% by June 2026?
Causal Effect
Sustained Hormuz disruption increases the probability of headline CPI exceeding 4.0% by +32pp (52% vs 20%). The causal mechanism operates primarily through energy CPI flipping from disinflationary to strongly inflationary (+0.8-1.5pp under sustained $100+ Brent vs +0.2-0.3pp without). The non-oil channels (tariffs, natural gas, dollar depreciation) persist regardless, but alone are insufficient to breach 4.0%. The sustained oil shock is the decisive variable.
Why This Matters
Tests whether sustained Hormuz disruption pushes headline inflation past the 4.0% threshold through compounding energy price pass-through. Pre-shock headline CPI was approximately 2.8-3.0% with energy as the sole disinflationary force. The oil shock removes this offset and adds an estimated +0.3-0.5pp to headline CPI over 6 months at sustained $80+ Brent. With sustained disruption pushing Brent to $100-130 (severe scenario), the energy contribution could add +0.8-1.5pp, easily breaching 4.0% when compounded with tariff pass-through and the natural gas surge (+160% in 6 months). The key question is speed of pass-through from wholesale to retail energy prices.
Resolution Criteria
BLS CPI report for May 2026 data (released mid-June 2026) shows all-items CPI-U YoY change exceeding 4.00%
Source Analysis
Inflation is driven by compounding supply-side pressures across three simultaneous channels: energy supply shock, tariff cost-push, and natural gas surge; pre-shock core PCE already sticky at 2.8-3.0% and re-accelerating