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OECD Warns Iran War Impacts All Major Economies, UK Most Vulnerable

The OECD's interim economic outlook warns that the Iran war will impact all major global economies, with the U.K. facing the worst effects among developed nations. The U.K. is forecast to have inflation at 4% and growth of just 0.5% in 2026, due to its heavy reliance on energy imports and limited storage. This vulnerability stems from disrupted energy supplies via the Strait of Hormuz, driving up prices and inflationary pressures. Among G7 countries, only the U.S. has a higher inflation forecast at 4.2%. The OECD emphasizes high uncertainty in the global outlook, as energy shocks outweigh supports from tech investment.

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OECD Warns Iran War Impacts All Major Economies, UK Most Vulnerable

The Organisation for Economic Co-operation and Development (OECD) has warned that the conflict between the U.S., Israel, and Iran will adversely affect all major global economies, with the United Kingdom facing the most severe economic consequences among developed nations due to its energy dependence.

OECD's Revised Economic Forecasts

  • The OECD's interim outlook, published Thursday, made the steepest forecast revisions for the U.K. among major economies.
  • U.K. inflation is now projected at 4% for 2025, up 1.5 percentage points from the December forecast.
  • U.K. growth for 2026 is forecast at 0.5%, down 0.5 percentage points from the previous review.

UK's Energy Vulnerability

  • The U.K. imports most of its oil and natural gas and has limited gas storage facilities, amplifying its exposure to global energy price shocks.
  • This dependence makes the U.K. more susceptible to disruptions from the conflict, such as blockages in the Strait of Hormuz.
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Global Energy and Commodity Disruptions

  • Iran's obstruction of energy shipments through the Strait of Hormuz and damage to regional infrastructure have surged energy prices and disrupted global supplies.
  • The OECD notes this has increased costs, weighed on demand, and added inflationary pressures, affecting commodities like fertilizers.

G7 Inflation Comparison

  • Among G7 industrialized economies, only the U.S. is forecast to have higher inflation this year at 4.2%.
  • The U.S. and U.K. are outliers in the G7 with inflation above 4%, while other members face lower rates.

Broader Economic Uncertainty

  • The OECD states the Middle East conflict tests global economic resilience, with the outlook "surrounded by high uncertainty."
  • Growth has been supported by technology-related investment and lower tariff assumptions, but energy shocks dominate risks.
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