Spanish Core CPI Final (Aug YY) 2.9% (Prev. 3%)

A small downward step in core from the flash vintage sits within the normal range of rounding and component rebalancing, and episodes of this kind have historically passed without moving Spanish government spreads or the front of the Euribor strip in any durable way. The channel that matters is aggregation: Spanish harmonised prints feed into the euro-area HICP calculation, and Spain has in recent cycles been one of the earlier and larger national inputs, so an easing in its core rate marginally softens the area-wide underlying read that the ECB staff projections lean on. The distinction worth drawing is between headline energy base effects, which fade mechanically, and core services momentum, which is the component that has historically determined how domestic inflation news transmits into rate expectations. The follow-ons are the other large member states' final prints and the area-wide flash, where the national revisions aggregate into the number that actually moves policy pricing.