Global oil markets absorbed their sharpest geopolitical shock in years this week as US-Israeli military strikes against Iran pushed Brent crude to its highest settlement price since January 2025. Brent closed at $81.40 per barrel on March 3 — a single-session gain of 4.7% — after surging approximately 10% to around $80/bbl on Sunday March 1, the day after coordinated strikes commenced, according to Reuters. Year-to-date, Brent is now up roughly 19% while WTI has gained approximately 17%, representing one of the commodity's strongest quarterly starts in over a decade.

The speed and scale of the move reflects not merely current supply disruption but the market's forward pricing of extreme tail risk: the potential closure of the Strait of Hormuz, the narrow waterway through which approximately 20% of globally traded oil passes daily. Three commercial vessels were attacked near the Strait during the week of March 2, according to BBC reporting, and Iranian naval forces had already enforced a de facto traffic reduction in the corridor within hours of the February 28 strikes commencing.

The Supply Shock Anatomy

The US-Israeli bombing campaign, launched on February 28, initially targeted Iran's missile production infrastructure, IRGC command nodes, and nuclear-adjacent facilities. On March 2, strikes destroyed the IRGC Malek-Ashtar industrial complex, one of Iran's primary ballistic missile component manufacturing sites. The operational tempo and declared objectives — which the Trump administration has framed as degradation of Iran's offensive military capacity — make a rapid ceasefire appear unlikely in the near term, sustaining a structural risk premium in crude markets.

Iran's retaliatory posture has extended beyond its borders in ways that directly threaten shipping confidence. The UAE absorbed drone strikes in the conflict's opening days, a US Embassy in Riyadh was targeted by an Iranian drone (intercepted before impact), Hezbollah has resumed operations in Lebanon, and a ballistic missile was launched at the NATO air base at Incirlik in Turkey — shot down by NATO air defence systems, per reporting by The New York Times. Collectively, these escalatory actions are sustaining a geopolitical risk premium that markets have not priced this prominently since 2022.

The diplomatic paralysis compounding the market's uncertainty is significant. As discussed in coverage of the UN Security Council's emergency session, the council has been unable to produce any binding resolution, leaving the conflict without a formal multilateral de-escalation mechanism. The structural nature of that impasse — the US holds a permanent veto — means markets cannot price in an imminent diplomatic resolution through the conventional international framework.

The $100/Barrel Threshold

With Brent at $81.40, analysts at several major commodity research desks have flagged the $100/barrel level as plausible under a Hormuz disruption scenario. The calculus is straightforward: a sustained closure of the strait would effectively remove approximately 17–20 million barrels per day from global seaborne trade, a volume that no combination of strategic petroleum reserve releases or alternative routing could fully offset in the near term. The last time Brent traded above $100/bbl was in the immediate aftermath of Russia's invasion of Ukraine in 2022.

The strategic petroleum reserve calculus is complicated by the fact that the Trump administration has already drawn on reserves during prior energy price spikes, reducing the buffer available for a sustained Hormuz disruption. OPEC+ spare capacity, theoretically available to offset a supply shock, is concentrated in Gulf states — several of which have themselves sustained Iranian retaliatory strikes, creating uncertainty about their operational continuity. Saudi Arabia and the UAE both hold significant output headroom, but the security environment materially complicates any rapid production ramp.

The collapse of nuclear diplomacy — the immediate trigger for the military campaign, as analysed in the collapse of nuclear diplomacy context — removes what had been a latent constraint on Iranian escalation calculus. Tehran's incentive structure has shifted: absent a diplomatic track to protect, Iran's retaliatory posture in and around the Strait of Hormuz carries lower opportunity cost than at any point in the past decade.

Equity Market and Macro Spillovers

The energy shock is feeding into broader equity market stress. The Dow Jones Industrial Average fell 1.28% over the week of March 2, while the S&P 500 declined 0.44%, according to SIB Global Markets data. The losses were concentrated in consumer and transportation sectors most exposed to fuel cost pass-through, while energy producers and defence contractors outperformed.

The macro policy dimension is particularly difficult. ISM manufacturing data for February showed US factory gate prices running at near a 3.5-year high — a reading that preceded the Iranian conflict and already reflected the inflationary pressure of the 15% global tariff regime, per Reuters. The oil shock now layers a second supply-side price impulse onto an economy already grappling with tariff-driven inflation, materially complicating the Federal Reserve's rate path. General Motors separately warned that its 2026 operating costs could swell by approximately $4 billion as a result of tariff-related steel and aluminium cost increases — a figure that will only increase if elevated energy prices persist.

What to Watch

The near-term oil price trajectory will be determined by three variables: the operational status of Strait of Hormuz shipping, the pace of Iranian retaliatory escalation, and whether any informal diplomatic back channel — potentially through Oman, Qatar, or Turkey — can establish even a partial de-escalation framework. A sustained close above $85/bbl in Brent would likely trigger a reassessment of central bank rate path expectations globally, as stagflationary dynamics from simultaneous tariff and energy shocks become harder to dismiss. Nonfarm payrolls data, due imminently, will provide the Fed's next significant data point on whether the labour market can absorb this dual supply shock without a visible deterioration.