Factory price gauges accelerated and Swiss inflation hit a two-year high, as markets price three ECB rate increases by the middle of 2027.
European policymakers spent the summer hoping energy-driven inflation would fade. September's early data say it is spreading instead.
Swiss consumer prices rose 1.0% from a year earlier in September, the fastest pace in two years, driven by energy. For an economy that spent much of the past decade flirting with deflation, a 1% print is a meaningful shift.
In the euro area, the final manufacturing survey showed both input costs and output prices accelerating, even as the headline index hit its highest level since May 2022. Manufacturers are not only paying more; they are passing more of it on.
Markets have already moved
Money markets now price three European Central Bank rate increases by the middle of 2027. That is an aggressive path, and it reflects how much the energy shock from the Iran war has reshaped the outlook.
The bond market is carrying the strain. French 10-year yields rose 60 basis points in September, their largest quarterly jump since 1987, and the spread over German Bunds widened to 117.1 basis points on Wednesday.
The diesel wildcard
A fresh energy risk emerged overnight. The U.S. administration is pressing France and Germany to release emergency diesel stocks or face a possible American export ban. Diesel feeds directly into transport and food costs, so any disruption would show up quickly in euro-area energy inflation, the component that has driven the rise all year.
What Friday will show
Economists expect Friday's flash estimate of euro-area inflation to come in at 3.6% for September. The detail will matter more than the headline. A rise driven purely by energy would support the view that the ECB is responding to a supply shock that will eventually fade. A pickup in core goods and services prices would suggest second-round effects are taking hold, the scenario that justifies the market's three-hike path.
The arithmetic of patience
At 3.6%, euro-area inflation would sit 1.6 percentage points above the ECB's 2% target. That gap is wide enough that even policymakers inclined to look through energy prices will find it hard to argue for patience, especially with factory surveys showing companies passing costs through to customers.
What to watch
Beyond Friday's flash reading, the next marker is whether Paris and Berlin respond to Washington's diesel request. A coordinated stock release would ease near-term fuel prices. A breakdown that leads to a U.S. export ban would hand the ECB another inflation problem it cannot control.