Industrial production rose 0.7% in September, nearly twice the 0.4% economists expected. Utility output jumped 3.5% and grew at a 14.8% annual rate in the third quarter, while factories managed 0.3% and motor-vehicle production fell 3%.
The headline said American industry is accelerating. The detail said American electricity demand is.
Industrial production rose 0.7% in September, the Federal Reserve reported, after a 0.1% gain in August that was revised up from no change. Economists had expected 0.4%, and no forecast in the usual survey was higher than 0.6%. Output grew at a 2.8% annual rate in the third quarter and stood 2.2% above its level a year earlier.
Three sectors, three speeds
Utilities carried the month. Their output rose 3.5% in September and grew at an annualized 14.8% in the third quarter. Capacity use at utilities climbed 2.3 percentage points, to 73.8%.
Manufacturing rose a more modest 0.3%, and mining 0.2%. Within factories, production of motor vehicles and parts fell 3.0%.
Capacity utilization across industry rose to 76.9%, above the 76.5% expected but still 2.5 percentage points below its 1972-2025 average. Factory utilization was 75.9%. Those levels describe an industrial base with room to spare, not one straining against its limits.
Weather or data centers
A one-month jump in utility output is often a weather story, and September heat or cold can swing the number. The quarterly figure is harder to dismiss. A 14.8% annualized gain over three months is the kind of sustained increase in electricity generation that analysts have been tying to data-center construction.
"Power hungry data centers have boosted demand for US power generation," economists at First Trust wrote. Another market commentary put it more cautiously: the headline "could be weather, but the year-over-year trend is consistent with data center load."
The timing is striking. The same week that the stocks and bonds of AI infrastructure companies sold off on worries about how the buildout will be financed, the government's output data showed the buildout's power demand still rising. One measures what investors expect; the other measures what is being built.
Utility shares were among the few gainers in a weak market on Friday, with the Utilities Select Sector SPDR fund up about 1.3% in early afternoon.
Market implications
One reading is that AI capital spending is now visible in the real economy and is broadening into power, equipment and construction. On that view, the utility surge is the leading edge of a multiyear rise in electricity demand, and the factory side will follow as equipment orders are filled.
A second reading is that the headline flatters a soft industrial picture. Strip out utilities and the gain is modest, auto production is falling, and factory utilization sits well below its long-run average. A month of unusual weather could account for part of the September jump.
For the Fed, the report adds to the evidence that the economy is not slowing quickly, on the same day import prices posted their largest annual rise since 2022.
What to watch
October industrial production on Nov. 17 and the Fed's annual revision of the series on Nov. 24, which will rebase the index and may reshape the recent trend. A second strong month for utilities in milder weather would strengthen the data-center reading.