The ECB sets the rate, France sets the spread.
A monetary reaction function written in OATs.

France has two interest-rate stories that must be read separately. The first is the ECB's policy rate, which France imports wholesale: the June hike to a 2.25 percent deposit rate - the ECB's first increase since 2023, driven by the Middle East energy shock - applies to France exactly as to Germany, and France has no say over it beyond its seat on the Governing Council. The second, and the one that actually matters for France, is the OAT-Bund spread: the premium France pays over Germany to borrow, set not by the ECB but by France's own politics and fiscal trajectory. The ECB sets the base rate; France's dysfunction sets the spread.

Because France cannot set its own monetary policy, the OAT spread is the closest thing it has to a market-determined reaction function - the mechanism through which its political and fiscal choices are priced in real time. Every failed budget, no-confidence vote and rating action moves the spread; every credible consolidation step would compress it. At around 69 basis points the spread embeds a substantial and persistent political premium, elevated versus history but well short of crisis levels. The market is charging France for its ungovernability without yet pricing a rupture. The spread is the single best real-time gauge of French sovereign risk, and it is the variable to watch.

The crucial subtlety is the ECB's role as the backstop against a French spread crisis. The Transmission Protection Instrument allows the ECB to buy a member's bonds to counter unwarranted, disorderly spread widening - a powerful tool that has helped keep peripheral and semi-core spreads contained. But the TPI carries a condition that is pointed in France's case: eligibility requires sound fiscal policy and compliance with EU fiscal rules. A France in a persistent deficit red zone, unable to consolidate, sits uncomfortably against that condition. The market believes the ECB would ultimately act to prevent a core-country crisis, but the conditionality means the backstop is not unconditional, and that ambiguity is precisely what keeps a political premium in the spread.

Our base case is an elevated, range-bound OAT spread that stays near current levels with episodic volatility around political events, contained by the implicit ECB backstop but kept wide by chronic fiscal dysfunction. The bull case is credible consolidation that compresses the spread materially toward semi-core levels. The bear case is a fiscal-political escalation that tests the TPI's conditionality - a scenario in which the spread widens sharply and the market is forced to ask whether the ECB would support a country failing its fiscal rules. That test would be the most consequential event in European rates, and France is the only large economy capable of triggering it.