French Bond Spread Hits Widest Level in Data Going Back to 1990

The yield gap between France's 10-year government bond and its German equivalent widened last week to the largest level in Bloomberg data going back to 1990. Germany's bund has long served as the benchmark for euro-zone borrowing, so a widening spread means investors are demanding a bigger premium to hold French paper than they have at any point in more than three decades.

The strain is not confined to one week. Reporting on the move frames the past decade as the worst for French government bonds since 1803, a span that stretches back to the Napoleonic era. That long view is what has unsettled traders, who see the spread as a running gauge of how much risk they assign to Paris's borrowing.

For the French government, a wider spread translates directly into higher financing costs relative to Germany, which feeds into budget planning at a time when debt levels are already a political flashpoint. Investors are now bracing for more of the same, and the mood in the market suggests the pressure is unlikely to ease quickly.