France 10-year OAT posts worst quarter since 1987, jumps 10 basis points

France's 10-year OAT recorded its worst quarterly performance since 1987, then jumped another 10 basis points — 0.10 percentage point — on Oct. 1, 2026, the Miami Herald reported. Higher yields lift government borrowing costs and can feed into loans. I see this as wider European duration stress, not just Paris.