TRUMP SAYS INFLATION WILL "COME DOWN LIKE A ROCK" WHEN THE IRAN WAR ENDS — BUT THE EVIDENCE SAYS OTHERWISE

A Presidential Promise That Runs Against the Data

On Wednesday, June 10, 2026, President Donald Trump stood before reporters in the Oval Office and made one of the most specific economic predictions of his second term. Asked about U.S. government data showing consumer inflation had surged to 4.2 percent in May — its highest level since April 2023, a three-year high — and whether that might hurt Republicans heading into the November midterms, Trump offered a response that stunned even veteran White House correspondents.

"I love the inflation," the president said.

He then went on to justify his position, revealing for the first time that the United States had been secretly moving oil tankers through the Strait of Hormuz during the Iran war, claiming the operation had successfully extracted "millions of barrels of oil. Millions. Every night." And when asked whether inflation would fall once the war ended, Trump was emphatic: "It's coming down. It's going to come down like a rock."

That declaration — casual, confident, built on the straightforward logic that a war-driven energy price shock will reverse itself the moment the war ends — is now being tested against a very different set of facts assembled by economists, energy analysts, logistics experts, and the president's own government agencies. The emerging picture is one in which Trump and much of Wall Street may have significantly underestimated how long inflation will remain elevated even after the guns fall silent. The Motley Fool's analysis, published today in a piece authored by Sean Williams and carried by Yahoo Finance, puts this tension at the centre of a broader argument: historical trends suggest inflation will be far stickier than either the administration or the markets appear to anticipate.

The Inflation Trajectory: How We Got Here

To understand where we are, it helps to trace the arc of the past four months. In January 2026, the U.S. Consumer Price Index was running at 2.4 percent annually — still above the Federal Reserve's 2 percent target, but well below the 40-year high of 9.1 percent recorded in June 2022 and trending in the right direction. Energy prices were relatively subdued. Gas was averaging $3.13 a gallon nationally. The U.S. Energy Information Administration was forecasting retail gasoline for 2026 at around $2.91 per gallon on average — a comfortable, low-inflation environment that Trump could credibly point to as evidence his economic policies were working.

February's CPI reading, released in March, came in at 2.4 percent — matching January, meeting economist expectations, and capturing the economy exactly as it stood before Operation Roaring Lion and Operation Epic Fury launched coordinated U.S. and Israeli strikes on Iran on February 28. Goldman Sachs Asset Management's Alexandra Wilson-Elizondo captured the moment precisely: "This is a welcomed number on the surface, but one that may already be outdated. February's data was collected before the conflict in Iran sent crude oil surging roughly 30 percent. The Strait of Hormuz remains the wildcard, and if disruption is sustained, the inflation improvement embedded in today's print could reverse quickly."

It reversed very quickly. The March CPI report, released in April, showed annual inflation at 3.3 percent — a jump of nearly an entire percentage point in a single month, the highest reading since May 2024, and a monthly increase of 0.9 percent, the largest single-month gain since June 2022. March also recorded one of the largest monthly oil price jumps in history: Brent crude gained 51 percent in a single month as Gulf output fell and exports stalled. Gas prices crossed $4 a gallon nationally for the first time in more than three years. The Oxford Economics forecast, at this point, was unambiguous: headline CPI would exceed 4 percent by April.

Oxford Economics was right. April's CPI came in at 3.8 percent. Then May's reading — the one Trump was responding to when he said "I love the inflation" — arrived at 4.2 percent, exactly in line with economist forecasts from FactSet, and representing a trajectory of acceleration that had moved the annual inflation rate from 2.4 percent to 4.2 percent in the space of three months.

The energy shock driving this acceleration is historically significant. According to a timeline published by CNBC, Brent crude prices surged more than 55 percent from the start of the war, jumping from roughly $72 a barrel on February 27 to nearly $120 at its peak. The IEA confirmed that Brent futures had peaked at more than 60 percent above pre-conflict levels in late April before pulling back in late May and early June as strategic reserve releases and some demand weakness eased market tightness. At its peak, roughly 20 percent of global crude production was disrupted — the largest oil supply disruption in history, according to the IEA's own language.

The "Come Down Like a Rock" Thesis — and Why Trump Believes It

Trump's argument is internally coherent and has a logical foundation. The Iran war generated an energy shock by disrupting the Strait of Hormuz, through which roughly 20 percent of the world's seaborne oil passes. Higher energy prices embedded themselves in the CPI through gasoline, airline tickets, transportation costs, and indirectly through food production and logistics. If the war ends, the Strait reopens, oil supply normalises, and energy prices fall back toward pre-war levels — then the inflation driven by that energy shock should, mathematically, unwind.

The administration's framing reflects this view consistently. Energy Secretary Chris Wright told NBC that Americans would "feel it for a few more weeks" and expressed a "very good chance" that gas would dip below $3 a gallon by summer. Trump himself argued in a Truth Social post that "short-term oil prices, which will drop rapidly when the destruction of the Iran nuclear threat is over, is a very small price to pay for U.S.A., and World, Safety and Peace." And on June 10, he reiterated: "When it's over, you will see oil drop to where it was before."

Wall Street has at least partially shared this view. Every time Trump has hinted at peace talks or a potential deal, markets have responded immediately and dramatically. When the president announced in early weeks that the U.S. and Iran had held "productive talks," Brent crude fell 10.9 percent in a single day, settling at $99.94 from nearly $120 the previous week, and the S&P 500 posted its best day since the war began. These reactions reflect an embedded belief in financial markets that the war's end will be inflationary relief and that the damage is largely temporary and reversible.

Why the Rock Won't Fall as Fast as Promised

The problem with the "come down like a rock" thesis is that it treats inflation as a two-way switch — on when the war is on, off when the war ends — and ignores a substantial body of historical evidence and real-world economic mechanics that suggest the unwinding process is far more gradual, far stickier, and in some cases irreversible within a meaningful policy timeframe.

The most immediately visible example comes from Trump's own government. The U.S. Energy Information Administration — the semi-independent statistical agency within Trump's own Energy Department — issued projections that directly contradict the president's prediction. Before the war, the EIA had forecast average retail gasoline prices of $2.91 in 2026 and $2.93 in 2027. After the war began, those projections were revised substantially upward. The EIA now forecasts retail gasoline averaging $3.64 in 2027 — meaning that even in the government's own modelling, gas prices are expected to remain significantly above pre-war levels a full year into the future, even under the assumption that hostilities end in the near term. Gas was under $3 a gallon in January. Trump has promised it will return there. His own Energy Department is not projecting that happening in 2027, let alone immediately.

The supply chain lag is the first and most fundamental reason inflation will outlast the war. Jim Fitterling, CEO of Dow Inc., speaking at the CERAWeek conference in Houston, made the point with a specific and sobering comparison: "The die is being cast for the rest of the year for what's going to happen in the markets. It's like the unwind we saw on supply chains during COVID. You could be in the 250- to 275-day range. This is not going to be an instantaneous rewind." That 250-to-275 day figure is not a random estimate — it reflects the documented experience of how long supply chain disruptions persist after their triggering events end. Oil tankers don't immediately resume normal routing the moment a peace deal is signed. Insurance rates for vessels transiting formerly dangerous waters remain elevated for months after the risk technically diminishes. Shipping companies hedge, plan around residual uncertainty, and price risk into freight rates long after headlines have moved on. These costs flow through into consumer prices with a lag that spans quarters, not weeks.

Mark Barteau, a professor of chemical engineering and chemistry at Texas A&M University, speaking to PBS NewsHour, was direct about the geographic dimension of this: "In places without enough refining capacity to meet their needs, such as the West Coast of the U.S., gas prices will take longer to drop. The bottom line is that getting back to 'normal' will be a lengthy process involving many parties and countries."

Judah Levine, head of research at the freight booking platform Freightos, noted that the Strait of Hormuz closure had affected approximately 2 to 3 percent of total global container shipping volume — but that higher oil prices and broader disruption had cascaded through the shipping industry far beyond those specific routes. Josh Steinitz, chief strategy officer at ShipStation Global, told PBS that consumers should expect higher shipping costs and more out-of-stock items online until at least the end of the year. And footwear industry analyst Matt Polk pointed out that most footwear sold in the U.S. is imported, and that shipping costs are expected to remain elevated through 2026 and into 2027 — with U.S. tariffs already imposed last year making it harder for retailers to absorb those costs. May's footwear CPI was already running 5.2 percent above the same month a year earlier.

The Structural Inflation Problem: Tariffs, Shelter, and Core Stickiness

Perhaps the most important distinction in this entire debate is the one between headline inflation and core inflation. Headline CPI includes energy and food prices, which move sharply in response to commodity shocks and are genuinely war-sensitive. Core CPI strips those categories out and reflects the more durable, embedded inflation in the economy — shelter costs, services, wages, and the gradual pass-through of higher input costs into consumer prices.

The current data tells a revealing story about core inflation. Even as headline CPI was rocketing from 2.4 to 4.2 percent between February and May, core inflation was rising much more slowly: 2.5 percent in February, 2.6 percent in March, and 2.9 percent in May. This means that even if oil prices fell completely back to pre-war levels tomorrow — which no serious energy analyst is projecting — headline CPI would not immediately return to 2 percent. It would settle somewhere around core inflation, which is running at 2.9 percent and is being sustained not by the war but by factors that exist entirely independently of what happens in the Strait of Hormuz: shelter costs that remain elevated, services inflation tied to labour costs, and the ongoing pass-through of tariffs that predate the Iran war entirely.

The tariff dimension is particularly significant. The inflation environment before the war began was not clean — it was already complicated by Trump's own trade policies. As EY-Parthenon chief economist Gregory Daco noted in his analysis of the May CPI, some categories like new vehicles, household furniture, and prescription drugs were actually posting price declines in May. He described this as potentially "a sign that the bulk of tariff-related passthrough appears to be behind us" — which is good news, in isolation, but it underscores that the pre-war economy was already navigating tariff-driven inflationary pressures that the peace deal will do nothing to address.

Mark Zandi, chief economist at Moody's Analytics — one of the most credible mainstream American economists — rejected the administration's claims about rapid price normalisation out of hand, according to MEXC's reporting. Yale Budget Lab's chief economist Michael Pearce offered the most specific timeline, telling Newsweek that his forecast assumed a U.S.-Iran deal reached by end of next month and pre-war Strait of Hormuz traffic resuming by end of year — and that even under those optimistic assumptions, GDP growth had already been downgraded from 2.8 to 2.1 percent. In a prolonged conflict scenario where shipping doesn't fully normalise until well into 2027, Pearce estimated oil prices could reach $150 a barrel — a level that would make the current 4.2 percent CPI look modest in retrospect.

The Federal Reserve: The Wildcard Nobody Is Talking About Enough

Running quietly underneath all of this is the Federal Reserve — and its response to this inflationary episode will have as much impact on the trajectory of prices as the war's end itself.

Ryan Nunn, a macroeconomist whose analysis was cited in Newsweek's coverage, framed the Fed's role precisely: "A larger or more-prolonged shock would have larger economic effects. One important unknown is the response of the Federal Reserve: if monetary policy is tightened to reign in prices, this would mitigate inflation but slow economic activity." In plain terms: the Fed could keep inflation from spiralling further, but only at the cost of slower growth — and in an environment where GDP has already been revised downward and where the administration is counting on economic momentum ahead of the midterms, a Fed rate hike cycle would be politically inconvenient and economically painful.

The CEPR's academic analysis of the war's inflationary impact, conducted by Kilian, Plante, Richter, and Zhou using a structural VAR model, estimated that even under a cautiously optimistic scenario where the Strait closure lasts just one quarter, the oil price surge would raise U.S. headline inflation by 0.6 percentage points and core inflation by 0.2 percentage points in 2026. Under a scenario where the closure persists for three quarters, WTI prices could gradually rise to $167 and core inflation could be pushed 0.49 percentage points higher — an effect that, crucially, would not disappear the moment oil prices fell, because core inflation has its own momentum and embedded dynamics. The paper's own summary noted that in most scenarios, "these effects are largely gone by the first months of 2027" — meaning the timeline for genuine price normalisation is not weeks, as the administration has suggested, but more than a year.

The Political Stakes and the "I Love the Inflation" Problem

There is a moment in the June 10 press exchange that is worth pausing on, beyond the "come down like a rock" prediction. When Trump said "I love the inflation," he was trying to reframe the data as a sign that the U.S. was successfully extracting strategic value from a war that had been expected to be costly. He tied inflation directly to the covert operation to move oil through the Strait, describing it as an acceptable price for strategic gain.

The political reality, however, is considerably more complicated. The NBC News poll released the same weekend as these comments found Trump receiving his lowest ratings ever in that poll on his handling of inflation and cost of living — 36 percent approval, 62 percent disapproval. On his handling of the Iran war itself, a majority of registered voters (54 percent) also disapproved. Trump won the 2024 presidential election in substantial part on the promise that he would bring inflation down and gas to below $2 a gallon. During the first year of his second term, he routinely highlighted declining pump prices in his public communications, including in his State of the Union address. Now, with gas averaging $3.84 nationally at the peak of the war shock — up 31 percent from a month earlier in early June — and the EIA projecting gas at $3.64 on average in 2027, the contrast with that original campaign promise is stark.

Congressional Republicans facing the November midterms are, by multiple accounts, acutely aware of this gap. The cost of living remains the most consistently powerful electoral issue in American politics, and a 4.2 percent headline CPI — even if energy-driven and technically temporary in character — is the kind of number that voters feel directly at the gas pump, the grocery checkout, and in their airline ticket prices.

The IEA's Assessment: Brent Has Pulled Back, But the Road to Normal Is Long

One important note of genuine good news in an otherwise complex picture is that the IEA's most recent assessment confirms Brent crude has pulled back substantially from its $120 peak. The IEA's own summary, published this week, noted that "prices pulled back in late May and early June as strategic stock releases and demand weakness eased market tightness, and after the United States and Iran announced an interim agreement to end hostilities." The stock releases — drawn from IEA member countries' strategic petroleum reserves, including the U.S. Strategic Petroleum Reserve — have provided genuine relief. Markets have responded positively to each credible peace signal.

But the IEA's framing of even this positive development contains its own implicit warning: the stock releases are finite, the interim agreement is not yet a permanent settlement, and the Strait of Hormuz — as the timeline of the conflict through April and May repeatedly demonstrated — can be effectively closed within hours of appearing open, as Iran or allied forces fire on tankers, reimpose restrictions, or signal that the strategic situation has changed. The very fact that oil markets have lurched violently both up and down since February in response to individual news cycles illustrates just how much uncertainty remains baked into the current price environment, even with talks apparently progressing.

What Economists Are Actually Expecting

The consensus view among serious economists — as opposed to either the administration's optimism or worst-case doomsaying — lands somewhere in the uncomfortable middle. Nancy Vanden Houten, a lead U.S. economist, suggested that May's 4.2 percent reading could represent a 2026 peak for the annual rate, which could then ease later this year as the war ends and energy prices begin to moderate. CBS News reported that Gregory Daco of EY-Parthenon noted that core inflation's relative stability in May — 2.9 percent — suggested higher energy prices weren't yet broadly spreading into other categories, which is the crucial dynamic that turned the 2022 inflation episode from a transient shock into a sustained two-year problem.

The distinction between 2022 and 2026 that most economists are drawing is this: in 2022, the energy shock happened alongside a labour market running extraordinarily hot, consumer demand running well above trend, and supply chains still deeply disrupted by the COVID era. In 2026, the underlying economy is in better shape but also more fragile — and crucially, the tariff environment means there is already one ongoing inflationary pressure that is independent of the war. If energy prices moderate and core inflation remains around 2.9 percent, the Fed can potentially thread the needle without a rate hike cycle. But if shipping costs, footwear prices, food transport costs, and the other secondary effects of the oil shock continue to filter through into core categories — as historical precedent suggests they will, over a lag of several months — then the path back to the Fed's 2 percent target remains a 2027 story at the very earliest, and possibly later.

Commerzbank's Dr. Vincent Stamer, whose team updated Euro area inflation projections to incorporate the Iran war energy shock, offered a formulation that applies with equal force to the American context: even in the baseline scenario — where the war ends within two months of his analysis — headline inflation rises above 3 percent before easing back to the ECB's 2 percent target by 2027. Core inflation, he noted, would re-accelerate "as energy costs filter through" — meaning the second-round effects of an energy shock arrive after the first-round effects, not simultaneously with them.

This is precisely what historical evidence from past oil shocks — the 1973 Arab oil embargo, the 1979 Iranian Revolution price shock, the 1990 Gulf War spike, and the 2022 Russia-Ukraine-driven energy crisis — consistently shows: oil prices can fall relatively quickly when a conflict ends or supply disruption reverses, but the embedded inflation those high oil prices generated in wages, shipping contracts, food production costs, and industrial inputs takes far longer to unwind, and sometimes never fully does. The "rock" falls at different speeds in different parts of the economy, and the parts that respond most slowly are often the ones consumers feel most acutely in their daily lives.

The Bottom Line for Markets, Consumers, and the Fed

For equity markets, which have priced in a relatively smooth path from war to peace to disinflation, the risk is that they are underestimating the duration and breadth of inflationary stickiness. The S&P 500's ability to rally on good-news headlines about the Iran deal has been remarkable throughout this crisis — but a market that has priced in rapid inflation normalisation following a peace agreement may find itself surprised by CPI readings that stay elevated well into 2027, particularly if the secondary pass-through effects that economists describe begin showing up in core categories.

For American consumers, the practical implication is simpler: expect the pain at the pump and in grocery aisles to ease considerably from its peak, but do not expect it to disappear quickly. The EIA itself — again, Trump's own agency — is projecting that gas will average $3.64 in 2027, not the below-$2 level Trump promised in 2024 or the "where it was before" level he has been predicting as the war's aftermath.

And for Trump himself, the fundamental political challenge is this: the credibility of "I love the inflation" as a sound bite depends entirely on how quickly inflation actually falls. If prices begin visibly moderating through the summer and into the fall, the gamble pays off and the midterm environment improves. If CPI is still running at 3-plus percent in October 2026 because shipping costs, food logistics, footwear prices, and other secondary effects haven't yet unwound, then "come down like a rock" becomes a promise that didn't land — and in American politics, promised relief that fails to materialise on schedule has a way of costing its promisers very dearly at the ballot box.

Sources

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