UK government bonds, or gilts, are flashing warning signs as the 10-year yield climbs to its highest since 1998. This surge is directly tied to political instability following local elections, which have thrown Prime Minister Starmer's government into chaos and raised fears of increased borrowing under a potential leftward shift.

While nominal spreads over US Treasuries approach 60 basis points, a more accurate comparison using swap rates—which strip out interest rate expectations—shows gilt performance has been middling this year. The methodology reveals the UK is not the outlier it appears when currency effects are ignored.

This weakness is not isolated. A global sell-off in longer-dated government debt, driven by inflation and rate hike expectations after the Iran conflict, is pressuring all developed market bonds. Though politically sensitive, the UK's fiscal position looks less dire when adjusted for divergent monetary policy paths across economies.