Long-term OAT yields recently reached their highest level since 2008, with 30-year OATs close to 4.9% and 10-year OATs marginally above 4.1% on 28 August. Much of this increase is due to a general trend in fixed income markets, with US, Japanese and German yields all rising this summer.
However, investors are also demanding a higher risk premium to compensate for the uncertain trajectory of French deficits and debt. The 10-year OAT yield spread over Bunds is around 85 bp (as of 28 August 2026), up from roughly 55 bp at the beginning of 2026. Funding conditions remain orderly, but the increase in yields will on the margin add to the French deficit as it becomes more expensive to refinance maturing debt.
French debt remains an attractive medium to long-term investment for bond investors, with yields that have returned to high levels for a sovereign rating that is still considered safe. However, the debate on the 2027 budget and the fiscal path for the 2027–2030 period will require greater vigilance.
The key issue for investors is how the fiscal trajectory will evolve over the next 5 years.
That said, France enters this phase from a position of relative strength, having benefited from a decade of exceptionally low rates:
France still has a high-quality sovereign credit rating. France remains in the 'investment grade' category, with A+ (stable outlook) ratings from Fitch and Aa3 (negative outlook) ratings from Moody's. The rating agencies have consistently highlighted the size and diversification of the economy, as well as the strength of its institutions.Key strengths include moderate growth, a sound financial system and the capacity to implement reforms that could support a credible consolidation path. However, if no significant fiscal consolidation measures are announced in the 2027 budget, France’s sovereign credit rating is likely to be downgraded.
The OATs market is one of the world’s most liquid sovereign euro-denominated markets. It is a deep market with high liquidity and securities that remain in high demand amongst investors. Given its size, French government bonds represent more than 30% of the euro area’s highest-quality sovereign debt, with ratings in the AAA to A range. OAT auctions continue to be oversubscribed: in spring 2026, for example, the amounts bid were well above those allotted (coverage ratio ~2x). The outstanding volume of medium- and long-term tradable debt exceeds €2.6 trillion, and there is sustained activity on the secondary market. French debt is a major benchmark for the Eurozone and is frequently used as high-quality collateral, which underpins structural demand.
Maturities are long and interest rate risk is actively managed. The average maturity of medium- and long-term debt is around 8.5–9 years, which limits the risk of a 'refinancing wall' and immediate exposure to rising interest rates. The comprehensive OAT yield curve ranges from short-term to very long-term bonds (up to 50 years), enabling the Treasury to smooth the repayment profile and tailor issues to different investors' preferences. Combined with the diversification of instruments (conventional OATs, inflation-linked OATs and green OATs), this active management can help stabilise the debt burden over time and broaden the investor base.
A strong institutional framework encourages the government to make hard choices. The institutional framework (European oversight, the Court of Auditors, the High Council, and increased transparency through the 'no-policy-change' trajectory assessment) provides an environment of governance that reassures investors of France's ability to take corrective action.
High foreign investor ownership is both a sign of confidence and a source of vulnerability. France’s debt ownership structure shows a significant share held by foreign investors, at around 56%, reflecting continued confidence in France’s creditworthiness. This share has risen in recent years as the ECB has begun to shrink its balance sheet, making French debt more vulnerable to foreign investor appetite. While OATs are often used by local investors as a hedge against other assets and liabilities, foreign investor demand depends more directly on the wider opportunity set. With higher bond yields globally, foreign investors may look for better opportunities elsewhere or demand higher yields to stay invested in case of higher political uncertainty.
Overall, French debt remains an attractive medium- to long-term investment for bond investors, with yields having returned to high levels for a sovereign with a high-quality rating. However, uncertainty linked to the electoral cycle, the budget approval process and the possibility of foreign investors moving into other markets will likely lead to increased volatility.