The cost of borrowing for the US government has reached 5% for the first time since 2023, driven by a significant sell-off in global bond markets as oil prices escalate and inflation worries mount. On Monday, the yield on the key 10-year US Treasury bond hit the notable 5% mark. Earlier in the year, it had decreased to about 4% but has been on an upward trajectory following the US-Israeli conflict with Iran that began in late February. The last occurrence of yields exceeding 5% was in October 2023.
This surge in bond yields coincides with Brent crude oil prices, the global benchmark, climbing above $108 per barrel. The increase in oil prices is largely due to attacks on Saudi Arabia’s energy infrastructure and rising tensions throughout the Middle East. A series of drone strikes compelled Saudi Arabia to close a crucial east-west oil pipeline, sparking fears of disruptions to the global oil supply. Additional attacks linked to Iran-backed Houthi forces and escalating tensions near the Bab al-Mandab Strait have further complicated the situation.
Further concerns were raised as Gulf states delayed talks with Tehran regarding a temporary shipping route through the Strait of Hormuz, a critical passageway that carries a significant portion of the world’s oil and gas. The hike in energy prices is contributing to inflationary pressures and increasing uncertainty about global interest rate trends. Investors are keenly observing the forthcoming interest-rate decision by the US Federal Reserve, with the Bank of England also set to announce its decision later this week.
The rise in US Treasury yields is pivotal for global financial markets, as the 10-year Treasury is a widely used benchmark for borrowing costs. Consequently, higher yields can lead to increased financing costs for governments, businesses, and households worldwide. In Europe, bond yields have also climbed, with long-term UK government borrowing costs reaching their highest in decades. The combination of rising energy prices and renewed geopolitical tensions has heightened concerns that central banks may need to sustain tighter monetary policies for an extended period.
Throughout the year, oil prices have remained notably volatile. Brent crude increased from roughly $72 per barrel before the conflict to a peak of about $126 in April, then eased during the summer amid hopes for a lasting ceasefire. Prices have since surged again as hostilities intensified and efforts to restart negotiations faltered. With oil prices once again above $100 per barrel, markets face renewed anxiety over inflation, interest rates, and the broader impacts of sustained disruptions to global energy and trade routes.