Global Bond Sell-Off Deepens as UK Long-Term Borrowing Costs Top 6%

A sell-off in global bond markets intensified on Thursday, driving UK long-term government borrowing costs above 6% and to a 28-year high, amid growing concern that US government debt levels are becoming unsustainable.

Britain's 30-year bond yield climbed to a level not seen since 1998, reflecting broader turmoil across global fixed-income markets as investors reassessed the trajectory of government borrowing in major economies.

Fears of renewed inflationary pressure, combined with persistently elevated government deficits, have contributed to the pressure on long-term bond yields in recent sessions. Rising yields increase the cost of government borrowing and can also affect mortgage rates and broader financial conditions.

The United States' widening budget deficit has been cited as a key factor unsettling bond investors, with concerns that continued high levels of government borrowing could further strain markets already sensitive to inflation expectations.

Market participants are continuing to monitor developments in both the US and UK bond markets for signs of further volatility, as the sell-off adds to broader uncertainty around global borrowing costs.