David McNamara: Middle East conflict risks global macro shock

While the human toll in the Middle East may be severe, regional wars do not always translate into broad global economic upheaval. Yet markets have already reacted: safe-haven assets such as gold and the US dollar have strengthened, energy prices have jumped, and equities have retreated. The key question now is whether this conflict remains contained or evolves into a wider macro shock.

Why this time could be different

In the wake of earlier strikes on Iran in 2025, markets regained lost ground within days. The current escalation, however—marked by the killing of Iran’s supreme leader and attacks on major Gulf economies—raises the risk of a more durable disruption.

Two main transmission channels

1) Energy prices and inflation

An energy supply shock could revive the inflation surge last experienced in 2022, quickly feeding through to consumer prices and reshaping central bank policy paths. Thus far, commodity moves remain well below the extremes seen after the invasion of Ukraine. Brent crude spiked in early Monday trading to nearly $80 per barrel, up from about $73 on Friday. Expectations of a sharper surge may have been tempered by an Opec+ pledge over the weekend to raise supply. European natural gas prices, typically more volatile in geopolitical crises, have climbed by nearly 25%.

Iran’s direct role in oil supply is relatively small—less than 4% of global output—but its geographic leverage is significant. The Strait of Hormuz, a critical chokepoint, handles roughly 20% to 25% of the world’s oil shipments and about 20% of seaborne LNG. Any sustained disruption there would ripple through global energy markets. The strait is also vital for exports from Saudi Arabia, the UAE, Qatar, and other Gulf producers.

2) Confidence and spending

Beyond commodity prices, a prolonged conflict could undermine business and consumer sentiment, much as occurred in the early phase of the Ukraine war. A confidence shock can delay corporate investment and hiring, which in turn weighs on household spending and growth—even if headline market moves appear contained.

Who is most exposed?

Most Gulf oil and gas flows head to Asia, leaving China, India, and Japan directly vulnerable to any shipping or production disruption. Qatar is also a key LNG supplier to Europe, making European energy markets sensitive to any sustained tightening. Ireland’s direct trade links with the region are limited, but as a net fossil-fuel importer it would still feel the pinch through higher global prices.

How the energy landscape has changed

Compared with the last major US-involved Gulf conflict in 2003, the structure of global energy supply has shifted. The United States is now the world’s largest oil producer, accounting for nearly 22% of global output versus about 6% in 2003. In addition, the world economy has become less carbon-intensive as renewable capacity has steadily expanded. These shifts may cushion—but not eliminate—the impact of disruptions, particularly if shipping lanes are threatened.

Market signals to watch

• Oil prices and Opec+ follow-through: Do supply commitments materialize, and are price spikes sustained?
• European gas and global LNG: How persistent is the jump in prices, and are cargoes rerouted?
• Strait of Hormuz traffic: Any signs of shipping delays, insurance surcharges, or naval incidents.
• Central bank guidance: Revisions to inflation forecasts, and any pushback on rate cuts.
• Business and consumer confidence: Early readings from PMIs and household sentiment surveys.
• Equity and credit spreads: Stress in energy-intensive sectors and emerging markets reliant on fuel imports.

Bottom line

For now, market moves are meaningful but not yet on par with the 2022 shock. The greatest near-term risks stem from potential supply interruptions and a deterioration in confidence. Structural changes—most notably America’s larger energy role and a gradual global pivot toward renewables—offer some buffer, but cannot insulate the world economy from a major disruption in the Gulf’s shipping arteries. Policymakers and investors should brace for elevated volatility, maintain flexibility, and closely monitor the energy and confidence channels that will determine whether this crisis remains a regional event or becomes a global macro shock.