The same oil shock reads differently on each side of the Atlantic

The noise is the rating, the signal is pricing power

On Friday evening the market was talking about Moody's. On 23 October the agency kept France at Aa3 with a negative outlook, although most economists had expected a cut to A1. The relief is real but conditional. Moody's tied the rating to the passage of a 2027 budget that narrows the deficit, and on the same day the National Assembly rejected the revenue section of the social security budget. The decision postponed a deadline; it did not ease a constraint.

The flash PMIs published the same day said something more important. The PMI, or purchasing managers' index, signals expansion above 50. In the US the composite index slipped to 57.6, yet the output price index climbed to 59.8, the highest reading since August 2022. In the euro area the composite fell from 53.1 to 51.9, and in France from 51.1 to 48.4. According to investingLive, euro-area input costs rose at the fastest pace since May because of energy, while output price inflation eased slightly. The same oil shock is hitting prices in the US and margins and demand in Europe.

The constraint: demand decides the pass-through

Demand explains the divergence. In the US new orders are rising, and the suppliers' delivery times index has dropped to 38.1, its lowest in more than four years. That shows supply cannot keep up with demand. In such conditions firms can add costs to prices. Households see it too: in the Michigan survey 5–10-year inflation expectations stand at 3.5%, the highest since May, and roughly 70% of respondents expect a rate rise next year. This is the most dangerous picture for the Fed, because once long-run expectations drift they are costly to pull back.

In Europe the picture is reversed. In France new orders fell at the fastest pace since May, and the future expectations index dropped to its lowest since April 2020. In Germany manufacturing rose to 54.2, but services fell from 52.9 to 51.7. In the UK, GfK consumer confidence plunged 11 points to −24. With demand weak, firms cannot pass their energy bills on to prices, so the cost stays in margins. That means second-round effects, where energy price rises spread to wages and service prices, may remain weak in Europe.

Central banks: same week, different questions

The Fed's policy range is 3.75–4.00%. It is expected to hold at its 27–28 October meeting, with a possible hike in December. September PCE inflation is forecast at 3.7% year on year. With the price index at 59.8, there is no obvious reason for the Fed to abandon its December option. The US 10-year yield, after a safe-haven drop on 22 October, moved back from 4.96% to 4.99% on 23 October.

The ECB's deposit rate is 2.50%. Nomura expects a unanimous hold on 29 October, followed by hikes in December 2026 and March 2027 to a peak of 3.00%. The same bank considers excessive the roughly 75 basis points of hikes the market prices in by September 2027. After the PMIs, the probability of a December hike is about 68%. With output prices slowing and France contracting, that probability is more likely to fall. If the Fed hikes in December while the ECB hesitates, the rate gap widens in the dollar's favour. EUR/USD fell to 1.1195 on 23 October.

For Türkiye the channel runs both ways. Slower euro-area demand means lost orders in its largest export market. A weaker euro against the dollar shrinks euro revenue relative to dollar debt. With Brent at 116.72 dollars, both effects operate alongside the energy import bill.

Thresholds to watch and what would falsify the thesis

The first test of this reading comes within four days. If the Fed writes price pressure and drifting expectations into its 28 October statement, the divergence will have entered policy language. If the ECB gives no binding signal for December the next day, the 68% probability should fall. The thesis weakens if both decisions point the same way. Should the ECB confirm a December hike while the Fed stays cautious, the rate gap will not widen and the euro will hold around 1.1195.

The second test is the flash data in early November. If euro-area flash inflation for October confirms the slowdown in output prices, it will prove that second-round effects in Europe remain weak. In the US, September PCE at or above 3.7% year on year would show the pass-through reaching consumer prices. The falsifier is clear: the US output price index falling below 57 in the November PMIs, or France's composite returning above 50. Brent falling below 100 dollars would remove the source of the divergence, namely energy costs.

The UK sits between these two poles. The flash composite PMI rose to 53.1, while GfK confidence collapsed to −24 and retail volumes fell 0.4% in September. The Bank of England's November decision will show whether it gives more weight to business or household data. Chancellor Healey's 28 October budget lands the same week and will test sterling's 17-month high against the euro.