A fresh bout of volatility is sweeping global bond markets as stronger economic data, rising oil prices and persistent inflation concerns revive expectations of higher interest rates.
The benchmark 10-year Treasury yield jumped 13.89 basis points on Wednesday to 5.106%, its highest level since 2007 and its biggest one-day increase since April 2025.
The move extended a recent selloff in government debt and pushed the closely watched yield further above the 5% threshold.
The interest-rate-sensitive two-year Treasury yield rose 11.4 basis points to 4.891% after reaching 4.947%, its highest level since May 2024.
Ten-year Treasury yields continued to rise in volatile trading on Thursday, climbing to 5.139%, its highest level since July 2007.
The 2-year Treasury yield rose to 4.897%, reaching its highest level since 2023, while the 30-year yield gained more than 3 basis points to hit 5.438%, its highest level since 2004.
Japanese government bonds were also hit.
The benchmark 10-year Japanese government bond yield jumped eight basis points to 3.062%, its highest level since August 1996, while the 30-year yield rose almost eight basis points to 4.147%.
European government debt has also come under pressure.
UK 10-year gilt yields jumped about 10 basis points, moving toward their highest level since the 2007 financial crisis.
What triggered the fresh selloff?
The catalyst was a stronger-than-expected set of economic readings.
S&P Global’s flash US Composite PMI Output Index, which covers manufacturing and services, climbed to 58.4 in September from 56.0 in August, its highest level since July 2021.
New orders accelerated sharply, reinforcing the impression that economic activity remains robust despite elevated borrowing costs.
The data complicated the outlook for monetary policy.
Stronger growth and persistent inflation pressures encouraged traders to price the possibility of another increase.
US crude also rose 2.3% to $92.60 a barrel on Wednesday, while Brent climbed 4.28% to $103.50.
Brent has remained above the psychologically important $100 threshold after briefly falling below it earlier in the week.
The result was Fed funds futures pricing in roughly a 70% probability of an October rate hike, according to the CME Group’s FedWatch tool.
“The main driver was a strong batch of PMIs, along with a rebound in oil prices, which both led to mounting speculation about faster rate hikes,” Deutsche Bank analysts said in a note on the Treasuries selloff.
Federal Reserve Governor Michael Barr added to those expectations on Wednesday, saying the central bank’s latest move was necessary to recalibrate policy and that further adjustments were likely.
Barr said inflation remained above the Fed’s 2% target and was not clearly moving lower quickly enough.
“In my base case, further policy adjustments are likely to be needed to ensure inflation comes down to target in a timely fashion,” Barr said.
Weak Treasury auction highlights investor caution
The sharp rise in yields was accompanied by less-than-usual demand for $70 billion of five-year Treasury notes at a government auction on Wednesday.
A weaker auction does not necessarily signal a fundamental change in investor demand, but it illustrates the tension created by the recent increase in yields.
Higher yields make government bonds more attractive from an income perspective.
At the same time, investors are demanding greater compensation for inflation, fiscal risks and the possibility that interest rates will remain elevated for longer.
What persistently high yields could mean for stocks?
The rise in bond yields is also beginning to feed through to equity markets.
US Nasdaq futures led losses, falling more than 1% after the index had reached new records earlier in the week.
Dow Jones Industrial Average futures were down about 0.4%, while S&P 500 futures fell roughly 0.6%. Asian equities also weakened, while the Stoxx 600 traded about 0.35% lower in early European trading.
The reason is straightforward: when risk-free Treasury yields rise, investors can demand higher returns from equities.
That increases the discount rate applied to future corporate earnings and can be particularly damaging for growth and technology companies whose valuations depend on profits expected years into the future.
“The stock market wants a resolution to the (Middle East) conflict, and if we don’t get that, we will have higher rates for longer, and that’s going to continue to weigh on the equity market,” said Lauren Cassidy, chief investment officer at Founders 100 ETF in Dallas.
Roger Aliaga-Díaz, Vanguard Global Head of Portfolio Construction and Chief Economist, Americas, similarly warned about the valuation effect of higher long-term yields.
“If the 10-year Treasury yield settles meaningfully above 5%, it would translate into a higher discount rate, meaning anticipated future cash flows would be worth less today, which typically lowers equity valuations,” he said in a recent commentary.
US debt costs meet a bigger global debt problem
The latest bond-market turbulence is occurring as governments around the world carry historically large debt loads.
Global debt increased by more than $10 trillion in the first half of 2026 to surpass $365 trillion, according to the Institute of International Finance.
Emerging-market debt accounted for much of the increase, rising by $6.5 trillion to more than $110 trillion.
The IIF said advanced economies paid more than $3.3 trillion in interest on internationally traded government bonds last year.
That was more than estimated global spending on artificial intelligence, defense or clean energy.
The scale of the debt burden means higher benchmark yields can have consequences well beyond bond investors.
Governments face larger interest bills, while companies and households generally encounter higher borrowing costs.
The IIF has warned that persistently large fiscal deficits and rising interest expenses are creating vulnerabilities in major economies.
As benchmark rates rise, governments need to allocate more revenue toward debt servicing, potentially leaving less room for public investment or fiscal support.
The OECD has similarly warned that rising government debt-servicing costs represent a growing risk to the global economy.
Expert view
Fiscal and financial risks have grown. Thirty-year government bond yields are at their highest in 15 years or more in six of the G7 economies. That means higher debt-servicing costs for governments whose budgets are already under strain, and it means higher borrowing costs for businesses and households.
Fed policy has shifted sharply this year
The latest market move represents a significant change from the outlook investors had at the beginning of the year.
At the start of 2026, the 10-year Treasury yield was around 4.15%.
It has since climbed to about 5.14%, reflecting a combination of inflation concerns, fiscal pressures, higher energy prices and expectations for tighter monetary policy.
Wall Street banks had initially expected the Federal Reserve to cut rates this year.
But the energy shock associated with the conflict involving Iran, combined with stronger-than-expected economic activity, has substantially altered that outlook.
The Fed raised interest rates this month for the first time since 2023.
Barr’s latest comments suggest that policymakers are not yet comfortable declaring the inflation fight over.
“This is the market telling us we’ve entered a genuine re-tightening cycle,” said Tony Miano, global investment strategy analyst at Wells Fargo Investment Institute, according to CNN.
The bond market is therefore facing two competing forces.
Stronger economic growth can justify higher yields because investors expect better returns and a stronger economy.
But persistently high inflation, rising oil prices and expanding government debt can push yields higher for more concerning reasons.
Economist explains why higher yields should not be surprising
Mohamed A El Erian, economist and chief economic adviser at Allianz, however, pointed our why the rising yields in themselves should not come as a big suprise.
“It is striking how many market participants have been surprised by the recent surge in US yields,” he said.
Expert view
The fundamental drivers have been evident for some time: Borrowing plans for major issuers, such as the government and large corporates (particularly tech), have been well telegraphed. The Federal Reserve has been signaling strong economic activity. The reasons behind the declining willingness and capacity of some traditional holders/buyers of US bonds have been well covered. The challenging quest to define the endpoint for the US/Israel-Iran conflict has been widely debated.
“What is playing a far larger role than it should is psychological anchoring: The collective mindset shaped by more than a decade of artificially low, repressed yields following the 2008 Global Financial Crisis,” he said on X.
Oil and fiscal risks remain key variables
The next phase of the bond selloff could depend heavily on whether energy prices remain above $100 a barrel and whether economic data continue to point to resilient demand.
The US Treasury said it would purchase up to $6 billion of longer-dated government debt on Thursday, the first such operation under Treasury Secretary Scott Bessent’s expanded programme aimed at addressing the recent increase in borrowing costs.
At the same time, reports of a possible US administration export ban on diesel have added another potential source of energy-market volatility.
Such a move could lift international diesel prices and potentially affect US gasoline prices if refiners respond by adjusting production.
For investors, the central question is increasingly whether the recent rise in Treasury yields represents a temporary reaction to oil and geopolitical shocks or the beginning of a more durable period of higher interest rates.
If inflation remains stubborn while growth stays strong, the Federal Reserve could face pressure to tighten policy further.
“If the next inflation readings continue to print hot, policymakers may conclude that aggregate demand needs to be brought lower through the blunt tool of higher interest rates,” said Chris Weston, head of research at brokerage Pepperstone.
If oil prices retreat and economic activity slows, some of the pressure on bonds could ease.
For now, however, the combination of a 10-year Treasury yield above 5%, oil above $100 and global debt above $365 trillion has put the bond market firmly back at the centre of the financial outlook.
This post Global bond sell-off: what happens to stocks if 10-year yields stay above 5%? may be modified as updates unfold
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