Oil Surges 3% as Iran Expands Gulf Strikes

Oil prices surged more than 3% on Sunday after Iran expanded military strikes into the Gulf, sending Brent crude above $78 a barrel and West Texas Intermediate above $73. Shipping traffic through the strategic waterway slowed sharply, reigniting fears about a disruption to one of the world's most critical energy corridors.

The move marks a significant escalation. Iran's decision to extend strikes into the Gulf raises the prospect of sustained interference with tanker routes that carry a large share of global crude exports. Even a partial slowdown in throughput can tighten physical supply quickly, because the spot market for oil responds to available barrels now, not to production capacity weeks away.

Why the Gulf route matters so much

The Gulf waterway is one of the highest-volume oil transit points on the planet. A meaningful disruption there does not just affect the countries directly involved. It reprices crude globally, because buyers scramble to secure alternative supplies and freight costs jump simultaneously. Slower shipping traffic is an early warning sign that traders and insurers are already treating the corridor as higher risk, which pushes up the cost of moving every barrel through it.

The 3% single-session price jump reflects that fear premium being priced in immediately. Oil markets tend to move fast on geopolitical risk because the physical consequences, delayed shipments, rerouted tankers, higher insurance premiums, can materialise within days rather than months.

Brent crude is the global benchmark used to price most of the world's traded oil, while WTI is the key US benchmark. When both rise sharply together, the signal is broad: the market is not reacting to a local supply issue but to a perceived threat to the wider system.

What changes next

The immediate question is whether the slowdown in shipping traffic is temporary or whether it deepens. If tanker operators begin formally rerouting vessels around the Gulf, voyage times lengthen, effective supply tightens further, and prices could push higher still. A sustained disruption would also force importers in Asia, who depend heavily on Gulf crude, to pay more or seek alternative sources, which ripples through refining margins and eventually fuel prices.

On the policy side, a prolonged price spike would put pressure on major consuming nations to consider releasing strategic petroleum reserves, a tool used in past supply shocks to cool prices quickly. Whether that threshold has been reached will depend on how the conflict develops over the coming days.

For energy markets broadly, the episode is a reminder that geopolitical risk in the Gulf has not faded. Even periods of relative calm can be broken quickly, and the speed of Sunday's price response shows that traders had not fully priced in this kind of escalation before it happened.

Equity markets tied to energy, from oil producers to tanker companies and refiners, are likely to open with sharp moves when trading resumes. Higher crude prices typically benefit upstream producers in the short run but squeeze margins for refiners and raise input costs for airlines, shipping firms, and heavy industry.

For consumers, the direct effect on petrol prices depends on how long elevated crude prices persist. A one or two-day spike rarely passes through to the pump. A week or more of prices held above current levels is when retail fuel costs begin to move. That timeline now depends almost entirely on how quickly the situation in the Gulf stabilises.