June CPI cools to 3.5% as energy retreats, but risks remain

US consumer inflation slowed more than expected in June, with headline CPI falling to 3.5% year-over-year from 4.2% in May as energy prices posted their steepest monthly decline since the onset of the pandemic. But the reprieve may prove temporary: the collapse of the US-Iran ceasefire has already reversed the gasoline price drop that powered the beat.

The Consumer Price Index declined 0.4% month-over-month, the first monthly drop since April 2020 and well below the 0.1% decline economists had forecast, the Bureau of Labor Statistics said Tuesday. Core CPI, which strips out food and energy, was flat on the month — versus expectations for a 0.2% gain — pushing the annual core rate to 2.6% from 2.9% in May.

"The June CPI report is the best inflation surprise of the year, but it's backward-looking," said Jeffrey Roach, chief economist at LPL Financial. "The energy shock from the Strait of Hormuz has already spilled over into July gasoline prices, and the risk of broader contagion into other consumer categories is real."

Energy prices fell 5.7% in June, the largest monthly decline since April 2020, with gasoline tumbling 9.7%. The drop reflected a fragile US-Iran truce that took hold in late May and held through June. That ceasefire collapsed last week after commercial tankers came under fire in the Strait of Hormuz, triggering military strikes between the US and Iran. The national average gasoline price has already rebounded to $3.86 a gallon as of Tuesday from $3.79 a week ago, according to AAA data, and oil prices climbed to a four-week high after President Donald Trump reimposed a naval blockade of the strait.

The June data showed broad-based disinflation beyond energy. Shelter costs rose just 0.1%, the smallest monthly gain since January 2021, while owner's equivalent rent increased 0.2%. Motor vehicle insurance fell 2%, communication services dropped 1.5%, and apparel prices declined 0.6%. Used cars and trucks slipped 0.2%. Food prices edged up 0.2%, with eggs jumping 4.3% and dairy rising 1.2%.

The Energy Risk That Isn't in the CPI

The June report captures none of the geopolitical escalation that began in early July. Gasoline prices had already risen 26.7% year-over-year in June despite the monthly decline, and the renewed conflict in the Middle East threatens to push energy costs higher in the months ahead. The Producer Price Index, released Wednesday, reinforced the disinflation narrative — headline PPI fell 0.3% month-over-month against expectations for flat readings, with the annual rate cooling to 5.5% from 6% in May. But producer prices remain elevated by historical standards, and energy inputs are the primary wild card.

Fed Chair Kevin Warsh, in prepared remarks to lawmakers Tuesday, said the central bank had "no tolerance for persistently elevated inflation" and that getting policy right was "the star we steer by." The Fed's benchmark overnight rate stands at 3.5% to 3.75%, unchanged since the June 16-17 meeting, where minutes showed policymakers' concerns about inflation mounted. Markets see a 60% probability of a quarter-point rate hike at the September meeting, according to OIS pricing, with the July 28-29 meeting expected to deliver a hold.

The last time headline CPI posted a monthly decline was April 2020, when the pandemic crushed demand. That episode was followed by years of above-target inflation. The current disinflation is similarly driven by a transient factor — a ceasefire that no longer exists — raising the risk that June's benign reading becomes an outlier rather than the start of a trend. If energy prices continue their July rebound, the Fed's path to its 2% target lengthens, and the case for rate hikes strengthens regardless of what the June CPI print shows.

This article is for informational purposes only and does not constitute investment advice.