Polish CPI Prel (Sep YY) 4.0% vs. Exp. 4.1% (Prev. 3.4%)

The jump in the annual rate dwarfs the small miss against consensus: a move of that size in a single month typically reflects base effects and administered or energy components rolling through the index rather than a sudden deterioration in underlying momentum, and the preliminary Polish print carries no breakdown, so the composition question is unresolved until the final release. For the NBP, episodes of this kind have historically been framed as transitory when driven by regulated prices or statistical carryover, and the council's easing bias has tended to survive single upside surprises provided core measures stay contained. The distinction that matters for the front end of the PLN curve is between a headline spike the central bank looks through and one that bleeds into core and services, which is what would delay further cuts. Worth watching are the final print with its component detail, any NBP commentary characterising the move, and whether rate-setters on the dovish wing soften their language. In past instances of this pattern, initial PLN and front-end reaction has faded once the base-effect narrative took hold.