The war with Iran has fueled high inflation in the United States, and the Federal Reserve faces a stress test from the OECD.
2026-03-27 15:28:59
A recent interim economic outlook report released by the Organization for Economic Cooperation and Development (OECD) indicates that the ongoing impact of the Iran war on global energy markets will significantly push up overall inflation in the United States this year. This forecast is far higher than the Federal Reserve's previous internal estimates and may force policymakers to take corresponding adjustments to address potential economic pressures. The report emphasizes that the uncertainty brought about by geopolitical conflicts is testing the resilience of the global economy.
According to the latest periodic update from the Organization for Economic Cooperation and Development (OECD), the overall inflation rate (all items) in the United States is projected to reach 4.2% in 2026. This figure is a significant upward revision of 1.4 percentage points from the organization's previous forecast of 2.8%, and also considerably higher than the 2.7% estimated by Federal Reserve officials in their forecast update last week. Compared to the inflation level in 2025, this projection shows a clear acceleration trend.
The Organization for Economic Cooperation and Development (OECD) stated that the revised forecast stemmed primarily from two key factors. First, the impact of the war in Iran in the Middle East led to a significant increase in global energy prices. Second, the continued effect of US tariff policies, despite a reduction in tariff levels, still exerted upward pressure on global prices. These factors combined to pass on energy costs to businesses and consumers, thereby pushing up overall price levels.
The organization explicitly stated in its report: "The breadth and duration of the conflict remain highly uncertain, but if energy prices remain high for an extended period, it will significantly increase business operating costs and directly push up consumer price inflation, having adverse consequences for economic growth." This assessment reflects market concerns about the protracted nature of the war.
Despite a significant increase in inflationary pressures in 2026, the Organization for Economic Cooperation and Development (OECD) also projects that the US inflation rate will decline significantly in 2027, falling to 1.6%. This level is not only lower than the Federal Reserve's forecast of 2.2%, but also lower than the Fed's long-term target inflation rate of 2%.
Specifically, core inflation, excluding energy and food prices, is projected to be 2.8% in 2026, further declining to 2.4% in 2027. This path suggests that energy price shocks are relatively short-term and temporary, and inflationary pressures are expected to gradually subside once conflict-related uncertainties ease. However, the organization also cautions that this optimistic downside scenario could face adjustment risks if the war drags on or energy supply disruptions worsen.
Under the baseline forecast scenario, the Organization for Economic Cooperation and Development (OECD) believes that the Federal Reserve will keep policy rates largely stable until 2027.
This assessment is based on multiple considerations, including the rise in overall inflation in the short term, the expectation that core inflation will remain above target levels in 2027, and the expectation that U.S. GDP growth will remain relatively robust.
Nevertheless, the Organization for Economic Cooperation and Development (OECD) also warned the Federal Reserve and its global counterparts, emphasizing the need for "high vigilance" to address potential inflation threats. The report stated: "The current supply-side driven rise in global energy prices can be temporarily ignored as inflation expectations remain well anchored, but policy adjustments may be necessary if there are signs of broader price pressures or a weakening labor market."
This view implies that the Federal Reserve needs to balance the relationship between short-term energy shocks and long-term economic growth when formulating monetary policy, in order to avoid overreaction or policy lag.
Regarding economic growth, the Organization for Economic Cooperation and Development (OECD) forecasts that the United States' GDP growth will reach 2% in 2026, an upward revision from some previous estimates, mainly due to strong momentum in investment related to artificial intelligence. Subsequently, GDP growth is projected to slow to 1.7% in 2027. This slowdown is primarily attributed to slower real income growth and more cautious consumer spending.
It is worth noting that US GDP growth slowed significantly to 0.7% in the fourth quarter of 2025, indicating a weakening of economic momentum. The report argues that rising energy prices resulting from the Iran war will further suppress demand and drag down global economic growth, but the US's advantages in high-tech fields such as artificial intelligence may partially offset this negative impact.
The Organization for Economic Cooperation and Development (OECD), a renowned international policy research institution, publishes a comprehensive economic outlook twice a year and regularly conducts medium-term updates.
This report further highlights the profound impact of geopolitical conflicts on global supply chains and energy markets. Not only is the United States facing inflationary pressures, but the overall inflation rate of the G20 is also expected to rise to around 4%.
The organization recommends that central banks closely monitor inflation expectation anchoring and adjust policies flexibly as necessary. The report also implicitly suggests that an early easing of the war or a return to stability in energy markets would be key factors in alleviating global economic pressures.
Overall , this OECD forecast provides important guidance for markets and policymakers. Against the backdrop of the ongoing war with Iran, US inflation is showing a pattern of "rising first and then falling," but uncertainty remains high. Investors, businesses, and consumers all need to pay close attention to energy price trends and subsequent policy signals from the Federal Reserve to better cope with potential economic fluctuations.
The forecast has been significantly revised upwards: US inflation is expected to rise to 4.2% in 2026.
According to the latest periodic update from the Organization for Economic Cooperation and Development (OECD), the overall inflation rate (all items) in the United States is projected to reach 4.2% in 2026. This figure is a significant upward revision of 1.4 percentage points from the organization's previous forecast of 2.8%, and also considerably higher than the 2.7% estimated by Federal Reserve officials in their forecast update last week. Compared to the inflation level in 2025, this projection shows a clear acceleration trend.
The Organization for Economic Cooperation and Development (OECD) stated that the revised forecast stemmed primarily from two key factors. First, the impact of the war in Iran in the Middle East led to a significant increase in global energy prices. Second, the continued effect of US tariff policies, despite a reduction in tariff levels, still exerted upward pressure on global prices. These factors combined to pass on energy costs to businesses and consumers, thereby pushing up overall price levels.
The organization explicitly stated in its report: "The breadth and duration of the conflict remain highly uncertain, but if energy prices remain high for an extended period, it will significantly increase business operating costs and directly push up consumer price inflation, having adverse consequences for economic growth." This assessment reflects market concerns about the protracted nature of the war.
Inflation paths diverge: projected to fall sharply to 1.6% in 2027.
Despite a significant increase in inflationary pressures in 2026, the Organization for Economic Cooperation and Development (OECD) also projects that the US inflation rate will decline significantly in 2027, falling to 1.6%. This level is not only lower than the Federal Reserve's forecast of 2.2%, but also lower than the Fed's long-term target inflation rate of 2%.
Specifically, core inflation, excluding energy and food prices, is projected to be 2.8% in 2026, further declining to 2.4% in 2027. This path suggests that energy price shocks are relatively short-term and temporary, and inflationary pressures are expected to gradually subside once conflict-related uncertainties ease. However, the organization also cautions that this optimistic downside scenario could face adjustment risks if the war drags on or energy supply disruptions worsen.
Federal Reserve Policy Outlook: Interest Rates Likely to Remain Unchanged Until 2027
Under the baseline forecast scenario, the Organization for Economic Cooperation and Development (OECD) believes that the Federal Reserve will keep policy rates largely stable until 2027.
This assessment is based on multiple considerations, including the rise in overall inflation in the short term, the expectation that core inflation will remain above target levels in 2027, and the expectation that U.S. GDP growth will remain relatively robust.
Nevertheless, the Organization for Economic Cooperation and Development (OECD) also warned the Federal Reserve and its global counterparts, emphasizing the need for "high vigilance" to address potential inflation threats. The report stated: "The current supply-side driven rise in global energy prices can be temporarily ignored as inflation expectations remain well anchored, but policy adjustments may be necessary if there are signs of broader price pressures or a weakening labor market."
This view implies that the Federal Reserve needs to balance the relationship between short-term energy shocks and long-term economic growth when formulating monetary policy, in order to avoid overreaction or policy lag.
Economic growth forecast: 2% in 2026, slowing to 1.7% in 2027.
Regarding economic growth, the Organization for Economic Cooperation and Development (OECD) forecasts that the United States' GDP growth will reach 2% in 2026, an upward revision from some previous estimates, mainly due to strong momentum in investment related to artificial intelligence. Subsequently, GDP growth is projected to slow to 1.7% in 2027. This slowdown is primarily attributed to slower real income growth and more cautious consumer spending.
It is worth noting that US GDP growth slowed significantly to 0.7% in the fourth quarter of 2025, indicating a weakening of economic momentum. The report argues that rising energy prices resulting from the Iran war will further suppress demand and drag down global economic growth, but the US's advantages in high-tech fields such as artificial intelligence may partially offset this negative impact.
Global Perspective and Policy Recommendations
The Organization for Economic Cooperation and Development (OECD), a renowned international policy research institution, publishes a comprehensive economic outlook twice a year and regularly conducts medium-term updates.
This report further highlights the profound impact of geopolitical conflicts on global supply chains and energy markets. Not only is the United States facing inflationary pressures, but the overall inflation rate of the G20 is also expected to rise to around 4%.
The organization recommends that central banks closely monitor inflation expectation anchoring and adjust policies flexibly as necessary. The report also implicitly suggests that an early easing of the war or a return to stability in energy markets would be key factors in alleviating global economic pressures.
Overall , this OECD forecast provides important guidance for markets and policymakers. Against the backdrop of the ongoing war with Iran, US inflation is showing a pattern of "rising first and then falling," but uncertainty remains high. Investors, businesses, and consumers all need to pay close attention to energy price trends and subsequent policy signals from the Federal Reserve to better cope with potential economic fluctuations.
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