France's budget crisis is heating up once more, pushing sovereign debt risk firmly into the market's spotlight. As the yield spread on French government bonds continues to widen, investor unease over the nation's fiscal sustainability is intensifying.

Bloomberg macro strategist Simon White points out that while France's debt issues certainly warrant caution, the underlying fiscal fundamentals of the United States are actually more fragile. For US Treasury investors, the shifts occurring in the French bond market may serve as an early-warning stress test.

Data reveals that the US government debt-to-GDP ratio has climbed to 122%, with a fiscal deficit-to-GDP ratio of 5.6%—both surpassing France's 113% and 5.1%, respectively. Meanwhile, annual US interest payments have exceeded $1 trillion, with fiscal pressure steadily accumulating.

More notably, when stripping out interest expenses, the US primary deficit remains the largest among major economies. Simon White argues that if the US continues to delay fiscal consolidation, the dollar's reserve currency status and the "safe haven" attribute of Treasuries could face more significant challenges.

French Debt Pressure Escalates While US Fiscal Fundamentals Prove More Vulnerable

The strain on the French government bond market is being released intensively. With the vote on Macron's final budget bill approaching, the yield gap between French and German bonds is widening, while a sharp downturn in the asset swap spread offers a more direct market signal, showing investors have grown cautious toward French sovereign debt.

France's fiscal position was already under pressure: its debt-to-GDP ratio stands at 113%, and its fiscal deficit-to-GDP ratio at 5.1%. Should the budget bill fail to secure parliamentary approval, the government would face mounting pressure to expand its financing scale, potentially exposing French debt risks further.

However, Simon White contends that compared to France, America's fiscal picture deserves even greater scrutiny.

The US debt-to-GDP ratio has reached 122%, its fiscal deficit-to-GDP ratio is 5.6%, and total annual interest payments exceed $1 trillion. Crucially, after excluding interest expenses, the US primary deficit ranks as the largest among major economies, indicating that its fiscal imbalance is not merely a product of high interest rates but carries a more pronounced structural character.

The persistence of a primary deficit implies that as long as primary revenues fail to swing into surplus, or nominal GDP growth remains below government financing costs for an extended period, the US debt burden will keep piling up. Inflation and low interest rates can only offer temporary relief, falling short of fundamentally resolving the fiscal imbalance.

America's Fiscal Advantages Are Being Eroded

Compared to France, the US still holds two key advantages: an independent monetary policy and the dollar's status as the global reserve currency. These factors grant the US stronger financing capacity and fiscal buffer room.

Yet in Simon White's view, these strengths are gradually weakening. On one hand, the Federal Reserve's monetary policy is becoming increasingly susceptible to fiscal demands; on the other, the current policy direction of the US government is also somewhat undermining external confidence in the dollar's reserve currency position.

If hard fiscal consolidation remains elusive, the US may slowly drift toward a predicament similar to France's: when debt expansion and political constraints reinforce each other, the market's ultimate concern is no longer just the fiscal deficit itself, but whether the government still possesses both the capability and the will to stabilize its debt.