Iran War Forces U.S. Gas Prices to 2024 Highs—Strait of Hormuz Closure Drives Supply Shock Trade

The macroeconomic cycle has been abruptly jolted by a major geopolitical event. The U.S.-Israeli war with Iran, which began on February 28, 2026, has effectively closed the Strait of Hormuz, a critical chokepoint for global energy flows. This disruption has triggered an immediate and powerful price shock in the commodity markets.

The impact on crude oil has been dramatic. Brent crude futures have surged, hitting an intraday high of $110.98 per barrel on March 18. The benchmark is now trading above $108, a level it has not seen since mid-2022. This move reflects a severe supply risk premium, with Goldman Sachs estimating that even a two-month closure of the strait could push its fourth-quarter Brent price forecast up to $93 a barrel from an earlier $71.

The shock is rapidly translating to the consumer. The national average U.S. gasoline price has surged to $3.58 per gallon, its highest level since mid-2024. This jump of nearly 60 cents since the conflict began underscores how quickly geopolitical instability hits household budgets. As one analyst noted, "Geopolitical shockwaves don't take months to hit your wallet. They take days."

This price spike introduces a fresh layer of economic risk. Higher oil prices are a direct fuel for inflation fears, which are already a key driver behind the Federal Reserve's hawkish stance. The resulting pressure on energy costs threatens to push mortgage rates higher, complicating the economic outlook just as the U.S. enters a critical political period.

The Macro Policy Response and Its Limits

The official response to the price shock has been swift and substantial. The U.S. government announced it will release 172 million barrels of oil from its strategic reserves over four months. This is part of a broader, coordinated effort by the International Energy Agency, which is mobilizing a total emergency release of 400 million barrels of oil-the largest such action in its history. The goal is clear: to inject liquidity into the market and counter the supply risk premium driving prices higher.

Yet these measures are fundamentally limited. They represent a finite, one-time supply response. As Goldman Sachs noted, a prolonged closure of the Strait of Hormuz could push its fourth-quarter Brent price forecast up to $93 a barrel. The scale of the IEA's coordinated release, while historic, is not designed to offset a structural disruption to a major global trade route for an extended period. It may provide a temporary buffer, but it cannot address the core constraint: the physical blockage of oil flows.

The policy response also highlights a lagging indicator in the system. Domestic refinery runs have increased by 63,000 barrels per day. This uptick in processing is a natural reaction to higher crude prices and aims to boost gasoline supply. However, it does not solve the fundamental problem. Refineries depend on imported crude, and the closure of the strait directly threatens that input. Increasing domestic refining capacity does not change the fact that the crude oil needed to feed those refineries is now blocked from reaching the U.S. market.

The bottom line is that these policy tools are blunt instruments against a specific, physical chokepoint. They may help moderate the price spike in the near term, but they do not alter the macroeconomic reality of constrained supply. The market's focus remains fixed on the geopolitical risk premium, which is proving far more durable than any finite reserve release can counter.

The Stagflationary Trade-Off and Fed Dilemma

The immediate price shock is now crystallizing into a deeper, more dangerous economic trade-off. The conflict is stoking classic stagflation risks, where inflation and weak growth collide. Inflation remains stubbornly sticky, with yearly total CPI inflation at 2.4% y/y. At the same time, job growth has already slowed to a crawl, averaging just 13k monthly payrolls over the past year and a mere 6k over the past three months. Higher oil prices threaten to push inflation higher while simultaneously eroding consumer purchasing power and business confidence, creating a perfect storm for economic stagnation.

This sets up a clear tension for the Federal Reserve. Chair Powell has previously noted that the risks to inflation and employment had both diminished. Now, with oil prices surging, both risks have risen with a skew to the upside for inflation. The Fed's dual mandate is now in sharper conflict. Its primary goal of price stability faces a direct assault from the supply shock, while its commitment to maximum employment is undermined by the very inflation it must fight. This is the core of the "tension" the central bank must navigate.

The market's expectation for rate cuts has already been sharply revised. Before the conflict, the market anticipated about 2.4 rate cuts for the year. That forecast has now been chopped to less than one action currently. Goldman Sachs has similarly adjusted its outlook, now expecting just two quarter-point cuts this year, starting in September. The central bank's own projections, as seen in the December Summary of Economic Projections, are likely to be revised to reflect this new reality. The median forecast for 2026 is expected to show a slight downward adjustment for growth and a slight upward adjustment for core inflation and the unemployment rate.

The bottom line is that the Fed is likely to hold its ground. With policy rates already in a range considered "plausible for neutral," the central bank is moving more cautiously anyway. The added layer of stagflation risk and economic policy uncertainty means the caution flag is waving more vigorously. A prolonged pause, or even a longer one than initially expected, is the most probable path forward. The market's focus will be on the March 18 press conference, where Chair Powell is expected to highlight these higher, skewed risks. For now, the Fed's hands are tied by a macroeconomic setup that makes cutting rates a dangerous gamble.

Catalysts and Scenarios: The Path of the Shock

The immediate trajectory of this shock hinges on a few critical variables. The primary catalyst is, of course, the resolution of the conflict. President Trump's expectation of a "very soon" end offers a near-term hope for relief. Yet the market's key watchpoint is the Fed's reaction. Any shift toward hawkishness to combat oil-driven inflation would exacerbate the growth slowdown, locking in a more painful stagflationary trade-off.

The severity of the price shock will be determined by the duration of the Strait of Hormuz closure. Goldman Sachs has modeled a stark scenario: a two-month disruption could push its fourth-quarter Brent price estimate from $71 a barrel to $93 a barrel. This highlights the finite nature of the policy response. The historic IEA reserve release is a buffer, not a cure. If the closure persists, the market will be forced to price in a prolonged supply constraint, likely pushing prices toward that elevated target.

Adding to the pressure is seasonal demand. As AAA notes, gas prices tend to rise around this time of year as the spring break season kicks off. This seasonal factor could compound the shock, providing an extra tailwind to already elevated prices. It means the market is facing a dual pressure: a geopolitical supply shock meeting a predictable seasonal demand bump.

The bottom line is a high-stakes wait-and-see. The conflict's end date is the single biggest variable. A swift resolution could trigger a sharp unwind of the risk premium, bringing prices back down. A prolonged standoff, however, would validate the higher price forecasts and deepen the economic strain. For now, the market is caught between geopolitical uncertainty and a Fed that is likely to hold its ground, leaving the path of the shock uncertain but potentially prolonged.