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Part of: Iran Oil Shock

US inflation accelerates on energy and food costs

US consumer prices climbed 3.8% year-over-year in April, the fastest pace in three years, driven by surging gasoline and grocery costs. The hotter-than-expected reading has reignited inflation concerns and pressured Treasury yields amid a fragile macroeconomic backdrop.

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Key facts

  • US CPI rose to 3.8% year-over-year in April, fastest pace in three years
  • Core CPI at 2.7%, exceeding economist estimates; headline driven by gas and food
  • Iran Kharg Island oil shipments halted; Russia crude output expected flat in 2026
  • JPMorgan CEO Dimon warns Iran war effects intensifying; warns of market exuberance
  • Morgan Stanley expects US inflation to peak May or June 2026

What's happening

Inflation topped expectations in April after months of disinflation hopes, with the consumer price index hitting 3.8% year-over-year. The acceleration was broad-based but concentrated in energy and food, where geopolitical shocks have disrupted supplies. Gasoline prices climbed sharply, and beef reached new all-time highs, amplifying pressure on already-strained household budgets and forcing policymakers to reassess the timeline for interest-rate relief.

The Middle East conflict has compounded the supply story. Iran's Kharg Island oil shipments appear to have halted, disrupting a critical crude flow. Russia's own oil infrastructure faces drone strikes, flattening expected 2026 production. Meanwhile, India has had to source diammonium phosphate at 40% above pre-war prices, and the Strait of Hormuz remains largely shuttered with Iran-linked vessels dominating limited traffic. Oil prices have held above 86 dollars per barrel as a result.

Fed expectations have shifted sharply. Morgan Stanley's Chief US Economist now expects inflation to peak in May or June, keeping the central bank on hold through the second half of 2026. JPMorgan's Jamie Dimon warned that the effects of the Iran war are intensifying daily and that market exuberance remains overdone. Tech stocks, which had surged on AI optimism, sold off on Tuesday as investors repriced terminal-rate expectations higher.

Sceptics argue that the spike is transitory and energy-driven, with core inflation at 2.7% still near Fed targets. The debate hinges on whether the geopolitical premium in crude is structural or cyclical and whether wage growth can absorb the real income hit. Trump administration officials are already pushing supply-side solutions to tackle inflation, but Congress and regulators face gridlock.

What to watch next

  • 01Fed policy decision: likelihood of rate hikes vs. holds through year-end
  • 02Trump-Xi Beijing summit: trade and tariff signals this week
  • 03Middle East ceasefire negotiations: oil price trajectory if tensions ease
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