France’s bond market strain is already widening borrowing cost gaps across the eurozone periphery, Substack author Robin J Brooks argued Oct. 19, putting other heavily indebted countries at risk of contagion.
Brooks said spreads between 10-year government bond yields and German yields have risen across the periphery as France’s spread has climbed. A wider spread means a country pays more to borrow relative to Germany. He said France’s 10-year yield reached its highest level of 2026 on Oct. 19.
The pressure could draw a response from the ECB, in Brooks’s view. He expects the central bank to try to cap yields first in peripheral countries, notably Italy, before extending such intervention more broadly. That is his forecast, not an announced ECB policy.
Brooks also compared France’s 10-year yield with an equal-weighted average of 10-year yields in the rest of the G10. He said the average rose when French yields jumped, a pattern he interpreted as evidence that the strain reaches beyond the eurozone.
He attributed part of France’s difficulty to a cost-of-living crisis driven by high oil prices and to political polarization, which he said affect other countries as well. Brooks said he believes markets expect the French government to offer concessions to protesters and argued that doing so would worsen its budget position.
In an outlook published the previous week, Brooks assigned a 30% probability to a French debt crisis by year-end. The 10-year yield spreads over Germany that he cited remain an indicator of whether pressure continues to spread across the periphery.
