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Here are the key findings and warnings from the World Bank regarding the economic impact of the escalating U.S.-Iran conflict, based on its June 2026 Global Economic Prospects report, April 2026 Commodity Markets Outlook, and public statements by its leadership.

Global GDP Growth

• Baseline forecast cut: The World Bank projects global growth will slow to 2.5% in 2026, down from 2.9% in 2025 — the weakest rate since the COVID-19 pandemic, driven directly by the Middle East conflict .
• Worst-case scenario: World Bank Chief Economist Indermit Gill warned on July 22 that escalating hostilities between the U.S. and Iran could slash global growth to as low as 1.3% .
• Earlier scenario estimates: World Bank President Ajay Banga said in April that a prompt end to hostilities might shave 0.3–0.5 percentage points off global growth, while a prolonged conflict could reduce growth by as much as 1 percentage point .
• Two-thirds of economies affected: The Bank found that two-thirds of economies have seen their growth prospects deteriorate as the war disrupts commodity flows and raises import costs .

Inflation and Commodity Prices

• Inflation surge: The conflict could add 200–300 basis points to global inflation, potentially reversing the disinflation trend that central banks had been relying on .
• Biggest energy price shock in decades: The World Bank's April 2026 Commodity Markets Outlook warned of the largest energy price surge in modern history, with oil prices breaching $100 per barrel and European gas prices doubling .
• Broader commodity disruption: The Bank cautioned that renewed escalation or prolonged disruptions to commodity flows would further raise commodity prices, intensify inflationary pressures, and worsen food insecurity .

Vulnerable Nations and Developing Economies

• $25 billion liquidity facility: The World Bank mobilized up to $25 billion through existing instruments to provide immediate liquidity for developing economies coping with the Middle East shock .
• Cascading impact on poor nations: Banga warned the war would deliver a "cascading impact" on developing countries, which face higher import bills, reduced fiscal space, and worsening food insecurity .
• Arab economies hit hard: A UNDP study (cited by the World Bank) estimated the war could reduce economic growth in Arab nations by $120–194 billion .
• Emerging market stress: The Bank's clients in emerging markets have already reached out for help as the conflict impacts commodity prices and logistics .

Financial Markets and Borrowing Costs

• Increased financial stress: The World Bank's June report warns that a prolonged conflict could "trigger financial stress" across global markets .
• Higher borrowing costs: The conflict has driven up global interest rates and borrowing costs, compounding the pain for debt-heavy developing nations .
• Market volatility: The energy shock has reverberated across financial markets, with the Strait of Hormuz disruption causing acute supply shortages, currency volatility, and heightened risks of stagflation .

Central Bank Policy Challenges (Including the Federal Reserve)

• Stagflation dilemma: Central banks face a classic stagflation trap — the conflict simultaneously pushes inflation higher (via energy costs) and growth lower, making any single policy response difficult .
• Fed's top worry: The Federal Reserve's May 2026 Financial Stability Report identified the Iran conflict and oil price shocks as the foremost financial stability concerns, noting that "geopolitical risks" and supply chain disruptions have surged to the top of the risk list for the U.S. central bank .
• Rate policy paralysis: With inflation potentially rising by 2–3 percentage points while growth slumps, the Fed and other central banks (Bank of England, European Central Bank) face the risk of having to keep rates high for longer or even raise them again, despite weakening economic activity .

Bottom line: The World Bank's central message is that the U.S.-Iran conflict has created the most severe energy-driven economic shock in decades, pushing global growth to post-COVID lows, reigniting inflation, straining developing nations disproportionately, and confronting the Federal Reserve and other central banks with a difficult stagflationary trade-off.