The U.S. economy powers up as summer winds down, but it’s not free of trip wires

A fresh reading on the largest segment of the U.S. economy shows it expanded in August at its quickest clip in six months. The acceleration arrived even as inflation ran warmer and a new tranche of White House tariffs took effect. That combination points to a domestic economy with considerable underlying momentum, rather than one buckling under cost pressures or trade frictions.

The report reinforces the view that this six-year-old expansion still has room to run. Because the services sector accounts for the bulk of U.S. output and employment, its steady growth supports the broader corporate earnings environment and helps explain why equity markets have remained resilient. It also offers the Federal Reserve cover to stay patient with its interest-rate decisions.

Still, trip wires remain. Persistent higher prices can erode real household purchasing power, and the latest tariffs may raise costs for businesses that rely on imported inputs. If those together begin to bite, the current burst of activity could prove temporary. Market watchers will want to see follow-through in employment, consumer spending, and sentiment data over the coming months to judge whether August was a launchpad or a high-water mark.