Will the United States and Iran reach a formal nuclear agreement by the end of Q4 2026?
What moved
INTERTANKO warns that attacks on merchant vessels now span the broader Gulf region beyond Hormuz; tanker routing costs and insurance premia are rising as transits contract.
The market transmission
The expansion of maritime risk across the Gulf raises shipping costs through elevated war risk premiums and insurance rates, feeding into refined product and crude transport margins. Tanker demand for longer routes increases with each reroute away from direct Hormuz transit, supporting charter rates. The insurance and freight cost pass-through will eventually widen refining margins and lift product prices at the pump, though the lag is weeks. Crude oil itself prices the supply flow constraint, not the routing cost, so the transmission is primarily through shipping and logistics rather than a direct crude repricing.
What would change this
The threat here is to shipping cost and vessel availability, not to crude supply itself. Hormuz transits can and do continue despite elevated risk; attacks do not equal blockade. The economic harm lives in the friction cost, higher insurance, longer routes, vessel idleness for rerouting, not in barrels lost. Severity depends on whether attacks force a material reroute away from the world's most direct Gulf transit; warnings of expanded threat are not evidence of a forced reroute yet.