PCE Inflation Surprises Higher, Dragging September Rate Hike Back Into Play

The Federal Reserve's comfortable summer narrative just acquired an unwanted houseguest. Annual headline PCE inflation arrived at 3.7% in July, exceeding the 3.6% expectation that markets had priced in with the confidence of people who should have known better. Core PCE held at 3.3% year-over-year as forecast, but the headline miss was enough to resurrect what seemed like a dormant possibility: a September rate hike is back on the table with 44% probability, up from 36% before the data, according to Fed funds futures.

This is the uncomfortable part of the inflation narrative that central banks prefer not to discuss in their carefully calibrated speeches. The United States still has an inflation problem, as Heather Long, chief economist at Navy Federal Credit Union, felt obliged to state with the tone of someone pointing out something obvious that apparently needed pointing out. Annual inflation remains stubbornly well above the Fed's 2% target, and while monthly readings have been gentler than the chaos of 2022 and early 2023, the year-over-year numbers refuse to cooperate with the soft-landing script.

The monthly data offered what central bankers might describe as a "mixed picture," which is finance-speak for "we were hoping for better." Both headline and core PCE rose 0.2% month-over-month. Goods prices actually declined 0.1%, buoyed by a 2.7% drop in gasoline and energy-related goods, which provided temporary relief from the kind of energy shocks that have derailed inflation forecasts before. The problem is that the overall picture doesn't resolve into the tidy narrative of inflation conquered and policy optionality maintained.

Ellen Zentner, chief economic strategist for Morgan Stanley Wealth Management, offered a diagnosis that reads like a disappointed diagnosis: "Today's mild upside inflation surprise and relative economic strength weren't necessarily what investors—or the Fed—wanted to see. It wasn't enough to shift the balance for September's FOMC meeting." The careful phrasing masks the reality: this data point moved probability in an unwelcome direction.

The timing creates a particular awkwardness. The Federal Open Market Committee does not meet formally in August, giving officials what amounts to a respite before their Sept. 15-16 gathering. But that respite comes with a Jackson Hole problem. Fed Chairman Kevin Warsh is scheduled to deliver a policy speech on Friday at the Fed's annual Wyoming symposium, an event where every word gets parsed by investors and economists operating under the assumption that the speech contains hidden guidance. The question is whether Warsh's remarks will acknowledge this inflation persistence or attempt to frame it as transitory enough to warrant patience.

Here's what the data actually shows: The Fed hiked rates to between 5.25% and 5.5%, declared victory too early, and is now discovering that inflation doesn't move on the Fed's timeline or respond reliably to its communication strategies. Year-end rate hike odds sit at 73%, suggesting markets haven't fully priced in a September move, but the probability floor has clearly risen. The soft-landing narrative that dominated market conversation through July has acquired some dents.

The central bank faces a classic policy dilemma. Raise rates in September and appear reactive to data points that might prove temporary. Don't raise rates and watch as the market reprices rate expectations in real time, creating the very volatility the Fed claimed to be managing. The odds now suggest a meaningful probability of a September hike, yet not overwhelming certainty, which means the next three weeks of economic data, Fed communications, and market pricing become genuinely consequential.

This is what happens when inflation stays above target for longer than projected, when monthly data offers relief but annual numbers refuse to comply, and when central banks spend months constructing a narrative around disinflation only to discover that inflation contains surprises. The Fed's inflation surprise machine keeps grinding because inflation itself isn't cooperative with the timetable.