Global bond yields hit multi-decade highs as oil tops $100

Long-term government bond yields across the world's major economies have climbed to levels not seen since before the global financial crisis, driven by a combination of energy price shocks from the Middle East conflict, persistent inflation, and ballooning fiscal deficits that show no signs of easing.

The US 10-year Treasury yield has reached 4.8% and appears headed toward 5%, while the 30-year US Treasury yield closed above 5.3% in August, its highest since 2007. In the UK, the 10-year gilt yield touched 5.28% last week, the highest since 2008. Germany's 10-year bunds have neared 3.4%, and Japan's 10-year yields crossed 3% for the first time in decades, with the 30-year Japanese yield reaching 4.2%.straitstimes+3

Energy Crisis and Fiscal Pressures Drive the Selloff

Oil prices hit $100 a barrel for Brent crude on September 9 due to the continued blockade around the Strait of Hormuz stemming from the US-Iran conflict, raising costs across the global economy. European gas prices have surged 150% since the start of the year, adding to inflation concerns ahead of winter.londonlovesbusiness+1

The fiscal picture compounds the pressure. US gross national debt has surpassed $40 trillion, with the federal government recording a deficit of $1.78 trillion in the financial year ended September 2025. Governments worldwide are competing with corporations for investor capital to finance defense spending, infrastructure, and AI-related investment, pushing borrowing costs higher.straitstimes+1

An ING analysis noted there is "no material countervailing force" to resist these moves, which are driven predominantly by higher real rates. Treasury Secretary Scott Bessent's buyback program, which began on September 9, may face challenges in easing the pressure.indexbox

US Equities Face Growing Vulnerability

UBS ↘ 0.42% has warned that US equities are the most vulnerable among developed markets if rising yields begin to weigh on stocks. HOLT analyst Michel Lerner wrote that many US companies, especially in the AI value chain, trade at valuations implying record future cash flows, making them "highly sensitive to a rising cost of capital".investing

"In effect, this makes the US the longest-duration equity market among developed economies," Lerner wrote, adding that higher yields lift the hurdle rate for growth projects where returns are already being questioned.investing

US forward earnings multiples have already contracted from 23 times in October 2025 to 19.4 times on a blended 12-month basis, according to Bloomberg data cited by AJ Bell. The S&P 500 remains near record highs, but the gap between long-term Treasury yields and stock dividend yields has widened to levels not seen since the dot-com era.ajbell+1

Rate Hike Expectations Build

Markets are now pricing in a 60% chance that the Federal Reserve will hike rates at its September 17 meeting, following stronger-than-expected August payrolls data showing 162,000 jobs added. The European Central Bank is also expected to raise rates this week, and the Bank of England faces similar pressure.londonlovesbusiness+1

For investors, the message from analysts is one of caution without panic. As Eastspring Investments' Goh Rong Ren noted, if economic growth continues to outpace borrowing costs, markets may absorb higher yields — but the margin for error is narrowing.economictimes.indiatimes