German inflation is 3.3%, French 3.0% and the euro area 3.8%. Which national number do you check first?

Destatis published Germany's provisional September inflation on 30 September: 3.3% on the year, with energy up 14.9% and core inflation at 2.4% (report). INSEE followed the same day with France: consumer prices 3.0%, the highest since January 2024, and 3.4% on the harmonised measure, with energy up 21.2% (report). Eurostat's euro area flash estimate came the next day at 3.8% (report).

German inflation is 3.3%, French 3.0% and the euro area 3.8%. Which national number do you check first? — central bank rate path diagram
A central bank's policy rate path across recent meetings

So the national figures land first and the aggregate arrives last. Both Germany and France say their numbers are provisional: Destatis publishes final results on 13 October, INSEE on 15 October, and Eurostat's full September data come on 16 October. The national and harmonised measures can differ, so a headline of "3.0%" in France is not directly comparable with "3.8%" for the euro area.

How do you use them?

German inflation is 3.3%, French 3.0% and the euro area 3.8%. Which national number do you check first? — risk-reward diagram
A risk-reward ratio of 1 to 2
  • Do you try to estimate the euro area flash from the national prints, or do you wait for Eurostat?
  • Which country do you check first, and do you weight by size?
  • Do you use the national CPI or the harmonised index? Which one matches what the ECB targets?
  • Have you been caught out by a national figure that did not translate into the aggregate?

The ECB decides on 29 October. How inflation moves currencies covers why these prints matter for the euro.

Please share your own approach and reasoning, not calls for others to copy. Posts that promise a direction or sell signals will be removed.

Background: How inflation moves currency pairs: the CPI transmission

Inflation is the input central banks watch most closely, which makes CPI the release that moves currencies most. Here is the transmission chain — from print to policy to price — and why the details beat the headline.

How does inflation affect currency prices?

Through central bank policy: higher inflation raises the odds of tighter policy, which attracts money and strengthens the currency. The chain runs from the print to the policy read to yields to the pair.

Why does the market react to the core CPI number?

Core CPI strips out food and energy, giving the cleanest read on underlying inflation. Central banks treat energy shocks as transitory, so the market's policy read focuses on the core measure.

Read the full guide

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