Global bond sell-off deepens, pushing benchmark yields to multi-year highs

The global bond sell-off that swept markets this week showed fresh intensity Tuesday, driving benchmark government borrowing costs in the United States, United Kingdom, Germany, Australia and India to multi-year highs. Analysts warned the move was approaching a "concern zone" for equities and the broader economy if yields climb further.

The US 10-year Treasury yield reached 4.80 percent on Tuesday, the highest since early 2025, according to The Globe and Mail. The SCMP put the yield at 4.78 percent, a 20-month high. The 5-year Treasury, a benchmark for auto loans, touched 4.55 percent, its highest since October 2025.

In the UK, the yield on 10-year government bonds hit an 18-year high of 5.29 percent before easing slightly to around 5.23 percent, The Guardian reported. The 30-year yield traded as high as 5.91 percent before falling back to 5.86 percent. UK yields remain near levels not seen since the 2008-2009 global financial crisis, according to The Globe and Mail.

German 10-year bonds rose to 3.35 percent, the highest in more than 15 years, while Australia's government borrowing costs hit a 15-year high overnight, The Guardian reported. India's 10-year bond yield topped 7 percent amid the global jitters, the same outlet noted, adding that Bloomberg reported the rising yields are giving Indian businesses, borrowers and investors a new worry.

**Drivers: Inflation, deficits, AI spending and geopolitics**

The sell-off has multiple triggers, according to the sources. Persistent inflation worries are central: investors demand higher yields when they expect prices to keep rising. The Globe and Mail noted that fighting in the Middle East caused oil prices to jump, renewing inflation fears. Brent crude hit $97 a barrel on Tuesday before falling back to $93.83, a 1 percent decline on the day, The Guardian reported.

Annual US government budget deficits remain higher than before the pandemic, forcing more Treasury issuance. Large technology firms are also borrowing heavily to build data centers for artificial intelligence, adding to demand for capital, according to The Globe and Mail.

Last Friday, Federal Reserve Chair Kevin Warsh signaled the central bank may need to lift its short-term rate in coming months if inflation stays elevated, the outlet reported. In the euro zone, inflation jumped to 3.3 percent in August, the highest in three years, leading investors to expect the European Central Bank to raise rates next week.

"The main driver behind the Treasury yield increase was not higher inflation expectations but higher real yields," said Padhraic Garvey, regional head of research for the Americas at ING, as quoted by the SCMP. He said this was worrying for American companies because they cannot increase prices to offset the impact. "We're heading into the concern zone, which is the other side of 5 percent for the 10-year Treasury … where alarm bells would begin to ring," Garvey added.

**Policy response and market reaction**

Treasury Secretary Scott Bessent addressed the G20 finance ministers in Asheville, North Carolina, this week, according to the SCMP. The Globe and Mail reported that Bessent last month announced an unusual intervention in the bond market to restrain rising yields. However, Bessent downplayed the overall rise in US yields in a conversation Tuesday with Fox Business host Larry Kudlow, saying, "I don't think we are in any kind of a dire situation," and arguing that other countries' bonds have seen bigger yield increases.

In the UK, Prime Minister Andy Burnham pledged to stick to fiscal rules during his first prime minister's questions, which The Guardian noted may have reassured investors that there would be no borrowing splurge in the autumn budget.

The Bank of Canada left its overnight rate unchanged at 2.25 percent, as expected, but warned that upside risks to inflation have increased due to the Middle East conflict and US-Canada trade tariffs, The Guardian reported.

Wall Street opened slightly higher on Tuesday, with the Dow Jones Industrial Average up 0.12 percent at 52,829.58, as the bond sell-off showed signs of cooling, according to The Guardian.

**Risk for stocks, mortgages and the economy**

Rising bond yields have direct consequences for consumers and businesses. The Globe and Mail noted that the 10-year Treasury yield strongly influences mortgage rates, and the average 30-year fixed-rate mortgage is near its highest level in a year. The 5-year Treasury is a benchmark for auto loans. Higher yields also drag on stock prices because investors discount future earnings at a structurally higher real yield, as Garvey explained to the SCMP.

Robin Brooks, a senior fellow at the Brookings Institute, told The Globe and Mail that policymakers are starting to get "pretty agitated" about the direction of yields. "You should care because this stuff under the surface is really bubbling," Brooks said. He attributed the global sell-off to the massive stimulus deployed during the pandemic. "The chickens for that are now coming home to roost."

Lale Akoner, eToro global market strategist, warned that the sell-off may have further to run, as quoted by The Guardian: "High oil and gas prices are keeping inflation worries alive, while governments and technology companies borrow heavily for AI. In our view, bond yields could remain high even if economies slow, because central banks may delay rate cuts and more bonds compete for investors' money."

The sell-off has also renewed focus on sovereign debt sustainability. The SCMP noted that while Bessent highlighted US leadership on sovereign debt issues in emerging markets, analysts said he was grappling with serious debt issues closer to home as yields climb.