Hormuz Strait Oil Flows Down 30% in Q1; Iran War Inflation Pressure Threatens ECB, BoE Rate Holds

The Iran war, now entering its 11th week, has triggered a seismic energy shock. According to the US Energy Information Administration, crude oil and refined product flows through the Strait of Hormuz fell by nearly 6 million barrels per day in the first quarter of 2026, representing a near 30% collapse in this critical chokepoint. The economic consequences are rippling across multiple asset classes and policy regimes.

Oil prices have held firm above $75 per barrel, with Brent crude tracking near the upper end of the recent range. Airlines like Air New Zealand are forecasting full-year losses as jet-fuel costs surge, forcing fleet reductions and service cuts on key routes. Refiners and energy importers face acute margin compression. Turkey's central bank revised its year-end inflationThe rate at which prices rise across an economy. target upward to 24%, explicitly citing the Iran war and higher oil prices. India has requested a US waiver extension on Russian oil sanctions as the Hormuz crisis erodes its energy security. Japan's Eneos has agreed to acquire Chevron's Asian refining assets for $2.17 billion, a defensive move to lock in supply amid supply-chain chaos.

The macro implication is severe. Headline inflationThe rate at which prices rise across an economy. is re-accelerating across developed markets precisely when central banks were hoping to normalize policy. The ECB's June rate hike, which Christine Lagarde had positioned as increasingly likely just two weeks prior, is now in doubt as Philip Lane signals uncertainty. The Bank of England faces similar pressures. Fed speakers like Minneapolis Fed President Kashkari have reiterated that inflation is "too high," which caps the rally in rate-cut expectations that crypto and equities had partially priced in. Treasury yields have pushed higher; 30-year Treasuries have yielded 5% for the first time since 2007, a signal that long-real-rates are grinding higher on inflation fears.

The debate centres on how sustained this energy shock will prove. Some traders believe OPEC+ will respond with production cuts or that US-Iran negotiations could normalize flows. Others argue that structural damage to Middle Eastern infrastructure may require months to repair, keeping supplies tight. If inflationThe rate at which prices rise across an economy. expectations become unanchored, central banks will have no choice but to hold policy tight, which would crimp growth and asset valuations across the board.