U.S. inflation linked to the Iran conflict is now spreading beyond energy, with core prices rising and supply chain disruptions affecting everything from food to tech, raising new risks for consumers and investors
Inflation in the United States is entering a more complex phase as the economic fallout from the Iran conflict extends well beyond the energy sector. While the initial shock was felt most acutely at the gas pump, recent data show that price pressures are now spreading into a wider range of goods and services, challenging both household budgets and the Federal Reserve's inflation-fighting strategy.
Stock markets have delivered strong returns during President Donald Trump's tenure, with the Dow Jones Industrial Average, S&P 500, and Nasdaq Composite all posting significant gains. Yet the persistence of inflation, especially as it moves beyond energy, is raising concerns about the durability of these rallies and the broader economic outlook.
Energy Shock and Its Ripple Effects
The Iran war triggered the largest energy supply disruption in recent history. After President Trump authorized military action, Iran closed the Strait of Hormuz to most commercial shipping, cutting off roughly 20 million barrels of petroleum liquids per day-about 20% of global demand. Oil prices surged more than 70% within weeks, and U.S. gas prices climbed at the fastest rate in over thirty years. Between February and May, annual inflation jumped from 2.4% to 4.2%, more than double the Federal Reserve's long-term target.
Although oil prices have eased somewhat on hopes for peace talks, the decline has been slow. Fuel prices typically rise quickly when supply chains are disrupted but fall much more gradually, leaving consumers with higher costs for longer. Even if a peace agreement reopens the Strait, the impact on household budgets is likely to persist.
Inflation Moves Beyond Energy
Recent inflation data suggest that the effects of the Iran conflict are no longer limited to energy. Core Personal Consumption Expenditures (Core PCE)-which excludes volatile food and energy prices and is closely watched by the Federal Reserve-rose to 3.4% in May, its highest level since October 2023. While headline inflation is projected to decline, the Cleveland Fed's Inflation Nowcasting tool forecasts that Core PCE will remain stubbornly high, with only a slight decrease expected by August.
Several factors are driving this broader inflation. Businesses are rerouting shipments, changing suppliers, and shifting to more expensive transportation methods to avoid the Strait of Hormuz, increasing costs that are passed on to consumers. The strait is also a chokepoint for fertilizer shipments, and shortages are pushing up food prices. Costs for petroleum-based products like plastics and synthetic materials have surged, and disruptions in helium production-a critical input for semiconductor manufacturing-are affecting technology supply chains.
These pressures are more persistent than energy price shocks alone. Unlike fuel, which can fall quickly if supply resumes, the costs embedded in supply chains and manufacturing tend to linger, making inflation harder to reverse.
Policy Risks and Market Implications
While President Trump has argued that inflation will subside once the Iran conflict ends, the stickiness of core prices suggests a more entrenched problem. If inflation remains elevated, the Federal Reserve may be forced to raise interest rates further to stabilize prices, which could slow economic growth and threaten the stock market's recent gains. Higher borrowing costs would also make it more expensive for companies-especially those investing heavily in artificial intelligence infrastructure-to finance expansion, potentially leading to a reassessment of high-growth tech valuations.
Not all of the administration's policies are contributing equally to inflation. While tariffs on select imports have added to consumer costs, their impact is minor compared to the broad-based price increases linked to the Iran conflict. For context, a recent Supreme Court decision could result in up to $175 billion in tariff refunds for U.S. companies, potentially improving cash flow for major retailers and influencing their investment and debt strategies, as discussed in this analysis of tariff refund impacts.
According to the Bureau of Labor Statistics, the Consumer Price Index (CPI) for June showed a year-over-year increase of 3.5%, down from 4.2% in May, but core inflation remained elevated. The Federal Reserve's preferred measure, Core PCE, has consistently exceeded its 2% target since early 2023, underscoring the challenge of bringing inflation under control amid ongoing supply disruptions and geopolitical uncertainty.
Understanding Core Inflation's Persistence
Core inflation measures, such as Core PCE, are designed to filter out short-term volatility in food and energy prices, providing a clearer view of underlying price trends. When core inflation remains high, it signals that price pressures are becoming embedded in the broader economy, often due to supply chain adjustments, labor costs, or persistent demand. This makes it more difficult for policymakers to rely on temporary relief from falling energy prices alone. For consumers, persistent core inflation can erode purchasing power and complicate household budgeting, while investors may face increased volatility as markets adjust to the prospect of higher interest rates and slower growth.
