French 5-year CDS hits highest level since April 2025 as sovereign debt fears mount

France’s 5-year credit default swap spreads have climbed above 45 basis points, reaching levels not seen since the panic-soaked days of March 2020.

CDS spreads are essentially the price of insuring against a government defaulting on its debt. When they rise, it means the market thinks the risk of not getting paid back just went up.

The numbers painting the picture

The surge didn’t happen overnight. On September 18, French 5-year CDS hit 41.5 basis points, already the highest reading since April 2025. In the days that followed, spreads continued climbing, with trading between September 19 and 21 showing the instrument fluctuating between 39.96 and 43.40 basis points before ultimately pushing past the 45 bps threshold.

To put the velocity in context: weekly gains exceeded 14%, while monthly gains topped 20%.

Meanwhile, the spread between French 10-year government bonds (OATs) and German Bunds widened to 104 basis points. That’s the first time the gap has breached the 100 bps level since the eurozone debt crisis of 2012.

The implied default probability baked into current CDS levels sits around 0.67%, assuming a 40% recovery rate.

Why the fiscal math is spooking markets

France’s projected budget deficit for 2026 sits at approximately 5.4% of GDP, well above the European Union’s 3% ceiling. The country’s debt-to-GDP ratio has ballooned to roughly 118%.

French banking stocks have already felt the heat. BNP Paribas dropped 3.6% amid the CDS spike, while Credit Agricole and Societe Generale each fell 2.5%.

What this means for European markets

The OAT-Bund spread crossing 100 basis points is particularly significant because it challenges the long-held market assumption that core eurozone sovereigns trade as a relatively tight cluster.

For the European Central Bank, the situation creates an awkward dynamic. The ECB has tools to contain sovereign spread blowouts, most notably its Transmission Protection Instrument, but deploying them for a country whose fiscal problems are largely self-inflicted would be politically toxic. The tool was designed for situations where spreads widen due to market dysfunction, not where they widen because investors are rationally responding to deteriorating fundamentals.