France's private sector shrank faster in August. The HCOB flash composite index of output fell to 48.8 from 49.4 in July, Trading Economics data shows, against a consensus of 49.5. Economists had expected the index to edge up. It went the other way.

Reading the index

A purchasing managers' index is a survey, not a measurement. Each month S&P Global asks purchasing managers whether output, new orders, employment and prices are higher, the same, or lower than the month before, and converts the answers into an index where 50 means no change. Above 50 is expansion, below 50 is contraction, and the distance from 50 indicates how broadly the change is spread across firms, not how large it is in euros.

That distinction matters for reading August's number correctly. France was already below 50 in July. The move from 49.4 to 48.8 does not mark a shift into contraction: it means a contraction already underway spread to more firms. The August print is the eighth consecutive month below the line.

Services are the problem

The split between sectors is stark. Services, which account for the bulk of French output and employment, came in at 48.4 against a forecast of 49.8. Manufacturing rose to 51.5, above the 50.0 expected, and is now the part of the economy pulling in the right direction.

That is an unusual configuration for France, and an unwelcome one. Manufacturing is the smaller and more cyclical sector; services are the ballast. An economy whose factories are expanding while its service firms contract is not one that a rebound in global goods demand will fix.

The policy squeeze

Here is what makes this print more than a data point. The European Central Bank raised its deposit rate to 2.25% on 11 June, its first increase since 2023, citing inflation pressure from higher energy prices tied to the conflict with Iran. It held at that level on 23 July, with President Christine Lagarde declining to commit to a path and pointing to geopolitical risk to energy markets. Markets have since moved close to fully pricing a further increase to 2.50% in September.

So France is weakening into a tightening cycle rather than an easing one. The euro area's monetary policy is set for the bloc, not for its second-largest economy, and the bloc as a whole has been doing better: the euro area composite PMI reached 52.0 in July, its strongest reading in eight months, on Trading Economics data. A currency union sets one rate for members whose cycles have diverged, and that divergence is what August's French numbers describe.

None of this determines what the ECB does. A single national flash PMI, released three weeks before a meeting and subject to revision when the final reading lands, is not the sort of evidence that moves a central bank that has just told markets it is watching energy prices. If French weakness spreads to the euro-area aggregate in the coming months, the calculation changes. If it does not, France gets the rate the bloc needs.

What to watch

Three things, in order. The final August PMI, which will confirm or revise the flash estimate and carry the detail on new orders, employment and price pressures that the flash summary does not. The euro-area aggregate, which is what the ECB actually responds to. And the September meeting, where the question is not whether the ECB notices France but whether energy-driven inflation has cooled enough to make another increase unnecessary.