US factory activity hits four-year high in May even as input prices stay elevated

US manufacturing activity expanded at its fastest pace in four years in May, the Institute for Supply Management reported on June 1, in a release that pointed to firming industrial demand even as input-cost pressures tied to the energy shock remained stubbornly high. The ISM Manufacturing PMI rose to 54.0, up 1.3 percentage points from April's 52.7 and the strongest reading since May 2022, marking a fifth consecutive month of expansion in the sector.

The improvement was led by a notable pickup in demand. The New Orders Index jumped to 56.8, up 2.7 points from the prior month and extending a run of growth after a stretch of contraction earlier in the cycle, while production also advanced. The breadth of the gains, spanning orders, output and trade flows, suggested the sector was moving from a fragile recovery toward a more durable expansion, with the overall economy registering its nineteenth straight month of growth by the survey's measure.

Beneath the encouraging headline, however, the report underscored the inflationary strain running through the industrial economy. The prices index remained elevated above 80, a level that signals widespread cost increases for manufacturers even after a modest moderation from recent peaks. Analysts tied the persistence of those pressures to the surge in energy and materials costs stemming from the conflict in the Middle East, alongside the lingering effects of tariffs, factors that have squeezed margins particularly hard in energy- and materials-intensive industries.

Supply-side frictions added to the picture. Supplier deliveries continued to slow, a dynamic that in normal times can reflect strong demand but in the current environment also captured the disruption to global supply chains caused by the war and the constraints on shipping through key Middle East routes. Together with the elevated prices index, the deliveries data reinforced the sense that cost and logistics challenges remained a meaningful drag on the sector even as activity picked up.

The report landed at a delicate moment for the broader economy and for monetary policy. With consumer inflation accelerating on the back of energy costs and the labor market holding firm, signs of strengthening industrial demand complicated the calculus for the Federal Reserve, which has been weighing how much of the recent price pressure is transitory. A manufacturing sector gaining momentum, even against a backdrop of high input costs, offered little encouragement to those looking for a near-term easing of policy.

For markets, the upside surprise in factory activity reinforced a narrative of resilient US demand that has supported the dollar and Treasury yields through a turbulent stretch. Stronger manufacturing data tends to bolster the case for tighter policy, and the May print added to a run of indicators suggesting the economy was absorbing the energy shock without buckling, at least at the headline level.

At the same time, the combination of firm activity and persistent price pressures captured the central tension defining the 2026 outlook. The energy-driven cost surge has propped up inflation even as it weighs on growth prospects elsewhere, leaving manufacturers and policymakers alike navigating an environment in which demand and costs are rising in tandem.

The next manufacturing survey, covering June, is scheduled for release at the start of July. Until then, the May report stands as evidence that US factories entered the summer on firmer footing than many had expected, while serving as a reminder that the inflationary legacy of the conflict continues to shape conditions across the industrial economy.