The 10-year bond yield spread between France and Germany surged above 80 basis points, reaching approximately 135 basis points and approaching 150 basis points — levels last seen during the 2012 euro area sovereign debt crisis. The widening reflects market concerns over France's fiscal trajectory, with the government's proposed €43 billion in budget cuts facing parliamentary resistance ahead of the 2027 elections. French 10-year borrowing costs moved toward 5% as the OAT-Bund spread breached 150 basis points.

The euro fell to its weakest level since May 2025 against the dollar as the spread widening intensified. French government bonds (OATs) and German Bunds are the benchmark sovereign instruments at the centre of this divergence — the spread between them serves as a direct measure of the risk premium markets attach to French sovereign debt relative to Germany's. Rising OAT yields increase France's sovereign borrowing costs, directly enlarging the government's interest bill.

French bank credit default swap spreads widened above those of other major European lenders, reflecting heightened perceived credit risk in the French banking sector tied to the country's fiscal position. BNP Paribas and Société Générale, as France's largest banks with significant exposure to domestic sovereign debt, saw their default insurance costs rise alongside the broader sovereign stress.

Emmanuel Moulin, head of the French central bank, acknowledged the seriousness of recent market movements and stated that France retains tools to reassure bond investors, while warning of the potential adverse effects of a sustained high interest rate burden on public finances.

Sources: investinglive.com, Bloomberg Markets, FT Home