Dallas Fed models Iran war’s stagflation trap: oil at $167 pushes inflation past 4% as rate-cut path closes

The Federal Reserve Bank of Dallas has published scenario modeling showing an extended closure of the Strait of Hormuz could push U.S. headline inflation above 4% by year-end, with a three-quarter disruption driving oil to $167 per barrel and adding 1.8 percentage points to fourth-quarter inflation.

A Dallas Fed working paper released April 7 uses dynamic stochastic general equilibrium and vector autoregressive models to trace transmission channels from the Iran War through Energy Markets, semiconductor Supply Chains, and wage-price dynamics. The Strait of Hormuz—which handles 20% of global oil trade—has been effectively closed for five weeks as of early April.

Brent crude surged above $100 per barrel in late February and climbed past $120 in early March as the conflict escalated, per Energy News Beat. U.S. gasoline prices rose above $4 per gallon in many regions, feeding directly into March consumer price index readings.

The Fed’s policy dilemma

The Dallas Fed research identifies a structural constraint: energy supply shocks create inflation without demand-side heat, leaving the Federal Reserve with no clean policy response. According to Investing.com, Federal Reserve Bank of Chicago President Austan Goolsbee warned that elevated inflation “gets ingrained into cost-plus contracts where people come down and they say, ‘well, if inflation is going to be 5%, I need a wage increase of 6%’; and then the business says, ‘if we’ve got to pay wage increases of 6%, we’ve got to raise prices 7%’.”

CME FedWatch now predicts the Fed will not cut rates at all in 2026, per CBS News—a reversal from pre-conflict expectations of multiple cuts. The FOMC raised its 2026 PCE inflation forecast by 0.25 percentage points to 2.7% at its March 17–18 meeting, with hawkish members warning sustained oil at $132–$167 per barrel could add up to 1.47 percentage points to headline inflation.

Supply chain transmission beyond energy

The Dallas Fed model captures second-order effects through industrial commodities and rare earth processing. Iran war disruptions have tightened sulfur flows through the Strait of Hormuz, which typically handles nearly half of global sulfur trade, according to InvestorNews. Sulfur is essential feedstock for sulfuric acid used in copper, nickel, uranium, and rare earth processing—creating bottlenecks that compound semiconductor supply constraints.

Tungsten prices stand at $2,250 per metric ton unit, a 557% increase in just over a year, outpacing gains in gold, copper, and oil. Semiconductor supply-chain vulnerability extends through energy-intensive chip fabrication in South Korea, where equity markets plunged 18% in the conflict’s early weeks.

Global growth downgrade, inflation upgrade

The IMF cut its global growth forecast by 0.2 percentage points to 3.1% for 2026 while raising the global inflation outlook to 4.4%, up 0.6 percentage points from its January estimate. The fund projects U.S. inflation will average 3.2% in 2026—up 0.6 percentage points from prior projections—before falling to 2.1% in 2027, assuming the conflict de-escalates.

The OECD forecasts U.S. inflation at 4.2% for 2026, 1.2 percentage points higher than previous predictions. These revisions reflect consensus that even a partial Strait reopening leaves residual price pressures from depleted inventories and restructured supply chains.

Anchored expectations versus realized inflation

Dallas Fed researchers noted in their analysis that “there is little evidence of higher gasoline prices being passed through to core inflation or long-run inflation expectations becoming unanchored.” This finding suggests the Fed retains credibility despite headline CPI acceleration, but Goolsbee’s warning about wage-price spirals highlights the risk that temporary shocks embed into medium-term contracts if the conflict persists beyond current ceasefire timelines.

Deutsche Bank’s Jim Reid observed that “with each passing day it gets harder to argue that the disruption to shipping and energy infrastructure will only prove temporary,” noting stagflationary pressure builds as both inflation and recession risks rise simultaneously.

What to watch

April 22 marks the expiration of the current ceasefire framework between Washington and Tehran. Vessel transit data from Windward, which tracks 69 Iran tension indicators in real time, will signal whether diplomatic progress translates to material Strait reopening. The next FOMC meeting will reveal whether policymakers adjust their inflation projections upward again or hold to the March baseline.

May employment and CPI releases will clarify whether labor market softening—which Goolsbee has cited as a concern—proceeds fast enough to offset energy-driven inflation acceleration. If unemployment rises while headline CPI stays above 3.5%, the Fed enters textbook stagflation territory with no conventional policy lever. Markets are pricing this constraint: equity volatility has spiked and Treasury curves have flattened as investors abandon expectations of both rate cuts and sustained growth.

Industrial commodity markets, particularly tungsten and rare earth processors, merit close monitoring for signs that supply-chain disruptions are easing or intensifying. Carnegie Endowment analysis of the semiconductor-energy nexus suggests South Korean equity performance may serve as a leading indicator for whether chip supply chains can absorb prolonged energy price elevation or face permanent restructuring costs.