Oil, equity prices shape Iran War adverse scenario macroeconomic impact: Fitch Ratings, highlighting the potential global economic fallout if geopolitical tensions persist through the first half of 2026, with growth slowing and inflationary pressures rising.
Oil, equity prices shape Iran War adverse scenario macroeconomic impact: Fitch Ratings analysis
According to Fitch Ratings, higher oil prices and declining equity markets would be the primary transmission channels of economic disruption in an adverse scenario where the Iran conflict continues until mid-2026. The agency’s cross-sector analysis indicates that global real GDP could be approximately 0.8 percent lower after four quarters compared to its baseline projections outlined in its March Global Economic Outlook.
The modelling, conducted using the Oxford Economics Global Economic Model, suggests that the impact would vary across regions depending on economic structure and exposure to energy markets and financial conditions. Economies such as the United States, Japan, and South Korea would face the most pronounced effects from rising oil prices, while countries like Canada and the United States would experience significant downside pressure from falling equity markets.
In the United States, wealth effects stemming from declining share prices are estimated to account for roughly half of the reduction in GDP growth under the adverse scenario. This reflects the strong linkage between financial markets and consumer spending in advanced economies, where equity holdings form a substantial component of household wealth.
The Oil, equity prices shape Iran War adverse scenario macroeconomic impact: Fitch Ratings assessment builds on its March projections, which forecast global growth of 2.6 percent in 2026, with the United States expected to expand by 2.2 percent, China by 4.3 percent, and the eurozone by 1.3 percent. Under the adverse scenario, however, growth trajectories would weaken notably, with US growth slowing to 1.5 percent, China falling below 4 percent, and the eurozone dipping under 1 percent.
The report indicates that the full impact of the shock would become most visible after four quarters, when economic conditions would deteriorate more sharply than annual averages suggest. By the fourth quarter of 2026, US real GDP growth would decline to 0.6 percent year-on-year, compared to 1.8 percent in the baseline scenario. Similarly, eurozone growth would fall to 0.6 percent, while global growth would ease to 1.7 percent from a projected 2.5 percent.
Emerging markets are also expected to face headwinds, particularly through tighter financial conditions and higher borrowing costs. Rising spreads in emerging-market bond indices would weigh on investment and growth prospects, compounding the effects of higher energy prices. The global economic impact Iran conflict scenario underscores the vulnerability of developing economies to external shocks, especially those reliant on energy imports.
Inflationary pressures would also intensify under the adverse scenario. Fitch estimates that inflation across the ‘Fitch 20’ economies would be 1.3 percentage points higher after four quarters than in the baseline outlook. Countries such as India, Poland, and Turkiye could see inflation rise by more than 2 percentage points, driven largely by elevated energy costs.
However, the report notes that these projections do not account for potential fiscal interventions by governments, such as subsidies or price controls, which could mitigate the impact of higher energy prices on consumers and businesses. Such measures, while potentially effective in the short term, could have longer-term fiscal implications.
Despite the expected rise in inflation, Fitch does not anticipate a significant tightening of monetary policy in major advanced economies, including the United States, the European Union, and the United Kingdom. This outlook reflects a different macroeconomic context compared to the energy price shock of 2022, which occurred alongside labour shortages, supply chain disruptions, and expansive fiscal stimulus.
The Oil, equity prices shape Iran War adverse scenario macroeconomic impact: Fitch Ratings analysis highlights the interconnected nature of global financial and commodity markets. Fluctuations in oil prices can quickly translate into broader economic effects, influencing inflation, consumer spending, and investment decisions, while equity market declines can erode wealth and dampen economic activity.
For policymakers, the findings underscore the importance of maintaining economic resilience in the face of external shocks. Strengthening fiscal buffers, ensuring stable financial systems, and diversifying energy sources are among the strategies that could help mitigate the impact of prolonged geopolitical tensions.
As global markets remain sensitive to developments in the Middle East, the trajectory of the Iran conflict will continue to be a key determinant of economic outcomes in 2026. The interplay between energy prices and financial market performance will likely shape the pace and stability of global growth in the months ahead.