US PCE Price Index (Jul YY) 3.7% vs. Exp. 3.6% (Prev. 3.7%)

A one-tenth upside surprise on headline PCE, with the prior unrevised, is the kind of small miss that typically moves the front end modestly unless it confirms a directional trend in the underlying series. The distinction that matters is between the headline and the core print, and within that between the annual rate and the monthly annualised run: the Fed's reaction function has historically keyed off the core measure and its recent momentum rather than the year-on-year headline, so a hot YY on base effects alone has tended to fade while a hot monthly core has repriced the path. The composition is the next read: services ex housing has been the stickier component in past disinflation episodes, and a surprise concentrated there has carried more weight than one driven by energy or goods. Worth watching are the revision pattern to prior months, the core and supercore detail, and whether officials' subsequent commentary treats this as noise or trend, since single-print surprises have rarely shifted policy without corroboration from the surrounding data flow.