Iran War Closes Strait of Hormuz; Oil Heads for Weekly Gain as 20% of Global Supply Disrupted

The war in Iran has achieved what sanctions rarely do: a near-complete closure of one of the world's most critical chokepoints for energy. The Strait of Hormuz, through which 20% of global seaborne oil flows, has become effectively impassable as shipping companies refuse to route tankers through Iranian waters amid military operations. The result is a cascading supply shock that is only partially being offset by US Strategic Petroleum Reserve releases and alternative shipping routes through the Suez Canal and around the Horn of Africa.

Oil prices reflected the tightness: WTI futures headed for a weekly advance despite Fed hawkishness and strong dollar headwinds. China's state media demanded the strait be reopened ASAP, signaling that Beijing is concerned about long-term energy security. Notably, nearly half of the US emergency oil being released from the SPR is being exported, a sign that global supplies have tightened so severely that even US reserves are being arbitraged into international markets where premiums are highest. Dow Chemical CEO Jim Fitterling said the company is "hardly moving anything" through the Strait of Hormuz and that it could take 275 days to normalize, a staggering supply-chain impact that extends far beyond energy into petrochemicals, fertilizers, and plastics.

InflationThe rate at which prices rise across an economy. fears are rippling through global bond markets. Japan's producer prices surged in April by the most in 12 years, according to BOJ data, driven by war-related oil price spikes. Japan's government bond yields are rising across the curve to multi-year highs, a rare development for a structural deflationary economy. The ECB's Yannis Stournaras warned that the central bank could be forced to hike rates if oil maintains its current level, a bleak prospect for Eurozone growth. India, meanwhile, raised petrol and diesel prices for the first time in four years, a move designed to tame demand and reduce government fuel subsidy losses.

The durationBond price sensitivity to interest rate changes. risk is material. If the Iran war drags on for 6+ months (as current geopolitical signals suggest), oil could sustain above $75-80 per barrel, locking in higher inflationThe rate at which prices rise across an economy. expectations and forcing central banks into a policy dilemma: support growth or fight price pressures. Energy importers face margin pressure; defense names benefit from elevated risk premium. Watch for any commodity-linked hedge funds to blow up if they were short volatility or long growth-correlated assets.