Inflation Just Cooled the Most in Six Years, Right as Oil Turned

The June inflation report was a genuine relief. Consumer prices fell 0.4 percent on the month, the biggest monthly decline in more than six years, pulling the annual rate down to 3.5 percent from 4.2 percent in May, and landing well below the 3.8 percent economists had expected. Core inflation, which strips out food and energy, was flat on the month. The catch is that it measures a month that is already over.

Energy did the work. Prices at the pump fell sharply through June, with the energy component down 5.7 percent, and because fuel feeds into almost everything that gets shipped or driven, a drop that large drags the whole index lower. The relief was real. It was also concentrated in exactly the thing that just reversed.

The core number is the reassuring part. Stripping out volatile food and energy, prices were flat and the annual core rate eased to 2.6 percent, which tells you the underlying trend is cooling rather than just the headline bouncing on cheaper petrol. That is the figure the Federal Reserve watches most closely. On its own, it argues for patience.

Markets took the hint immediately. Treasury yields fell sharply and stock futures turned positive, because a cool print pushes the odds of a July rate hike back down and buys risk assets some room to breathe after a brutal few sessions. For a morning, the tightening fear eased. The bond market exhaled.

The problem is the calendar. This report covers June, when oil was falling, and July has opened with crude surging above 85 dollars on the Gulf war and a US move to tax the Strait of Hormuz, so next month's energy line is likely to swing the other way. Good data can have a short shelf life. This batch may be past its best before it is even digested.

So the economy delivered its friendliest inflation number in years at the precise moment the thing that produced it went into reverse. Headline down to 3.5 percent, core easing, yields falling, and a war quietly rewriting the next report. June's inflation went down. July's oil is already trying to undo it.