20th August 2026
There is something slightly counter-intuitive happening in financial markets at the moment. Governments are being forced to pay more to borrow money, yet to someone looking at a headline saying that “bond yields are rising”, it can sound like good news. Surely a higher return on bonds must be positive?
For the individual who already owns bonds, or is looking for somewhere to put savings, higher yields can indeed eventually be attractive. But from the perspective of governments, businesses and borrowers, the story is very different. Rising long-term bond yields are effectively the market sending governments a bill for borrowing money.
And right now that bill is getting larger across much of the developed world.
The United States has been at the centre of the latest sell-off. On Tuesday the yield on the 30-year US Treasury reached 5.327%, its highest level since 2007, while the 10-year Treasury reached 4.747%. Yields have eased slightly today, with the 30-year around 5.28% and the 10-year around 4.69%, but that does not mean the underlying problem has disappeared.
More importantly, this is not simply an American problem.
Germany and France have seen long-term borrowing costs rise to levels not experienced for many years, while Japanese government bond yields have approached their highest levels in roughly three decades. In Britain, the 10-year gilt yield is around 5%.
This is therefore beginning to look much more like a global repricing of government debt than an isolated wobble in the US Treasury market.
Why are bond yields rising?
To understand what is happening, it helps to forget for a moment the complicated language of the financial markets.
Imagine the government is a household that needs to borrow £100,000. If the lender is happy with the government's financial position, expects inflation to remain low and believes the borrower is a safe bet, it might be prepared to lend that money at a relatively low interest rate.
But suppose the lender starts worrying that inflation could remain high, that the borrower is already heavily indebted and that the borrower will need to keep coming back for more loans.
The lender is likely to say: I'll still lend you the money, but I want a higher interest rate.
That is broadly what is happening in government bond markets.
Investors are looking at enormous government borrowing requirements, persistent inflation, higher defence spending, geopolitical uncertainty and the possibility that interest rates will remain higher for longer.
They therefore want to be compensated more generously for holding government debt for 10, 20 or 30 years.
The US has the additional problem of enormous federal borrowing requirements. The government's debt burden is already extremely large, while the Treasury needs to continue issuing bonds to finance deficits and refinance existing debt.
There is also competition for investors' money. Huge amounts of corporate borrowing, including borrowing associated with the enormous investment in artificial intelligence infrastructure, are competing with government bonds for capital.
But isn't a higher yield good for savers?
Yes — and this is where the terminology can be misleading.
A yield is essentially the return an investor receives for holding a bond at its current market price.
If you already own a bond and its market price falls, its yield rises. So the fact that yields are rising doesn't mean everybody holding bonds is suddenly becoming richer. Quite the opposite: existing bonds generally fall in market value when yields rise.
But someone buying a new bond at the higher yield can obtain a better future return.
So there are winners from higher yields.
Savers and pension funds can eventually benefit because they can earn more on newly invested money. People buying government bonds today are getting considerably more interest than investors received during the era of ultra-low interest rates.
The problem is that governments are on the other side of that transaction.
For the government, somebody else's higher return is its higher borrowing cost.
Why should ordinary people care?
This is the really important part of the story.
Most people don't own US Treasuries or German Bunds. They may never have heard of a 30-year gilt. So it is perfectly reasonable to ask why any of this matters.
The answer is that government bond yields provide an important benchmark for borrowing throughout the economy.
If investors demand 5% to lend to the British government for ten years, a private company is unlikely to be able to borrow for ten years at 3%.
A mortgage lender won't simply ignore what is happening in the wider financial markets either.
Higher government bond yields can therefore feed into mortgages, business loans, investment decisions, commercial property finance and other forms of borrowing.
The effect isn't instantaneous and it doesn't mean mortgage rates suddenly jump by the same amount as gilt yields. But the direction matters.
That is why a bond-market story can eventually become a household story.
A family renewing a mortgage may find that borrowing costs are higher than expected. A small business looking for a loan to buy equipment may face a higher interest rate. A company considering a new factory may decide the project no longer produces a sufficient return to justify the investment.
And eventually those decisions affect employment, investment and economic growth.
The government faces an even bigger problem
There is another reason rising yields are particularly uncomfortable for governments.
Governments don't normally borrow money once and pay it all back immediately. They continually refinance their debt.
Imagine a government has £100 billion of debt that was issued when interest rates were very low. As that debt matures, the government replaces it with new borrowing.
If the old borrowing cost 2% but the new borrowing costs 5%, the government doesn't suddenly pay 5% on the entire £100 billion.
But gradually, as old debt is replaced, the average cost of servicing the national debt rises.
That means more of the government's annual tax revenue has to be devoted to paying interest rather than providing services or cutting taxes.
This is where rising yields can become a political problem.
Money spent servicing debt cannot simultaneously be spent on the NHS, schools, pensions, infrastructure or tax reductions.
The government can borrow even more to cover the interest, but that creates another problem because investors may then demand still higher yields.
This is why bond markets sometimes become described as the government's “creditor”.
The bond market is not a democratic institution. It doesn't vote in elections. But it can exert enormous pressure on governments simply by demanding higher returns.
Britain is particularly interesting
For Britain, the current situation deserves close attention.
The UK 10-year gilt yield was around 5.03% today, according to current market data. That is substantially higher than the ultra-low yields Britain became accustomed to during much of the 2010s.
This matters because Britain already has a large public debt burden and substantial annual financing requirements.
There is also the inflation problem.
UK inflation rose to 2.9% in July, while higher energy costs are creating renewed concerns about where inflation goes next. At the same time, the international oil market remains heavily influenced by the continuing Middle East crisis.
That creates an awkward situation for the Bank of England.
If inflation remains stubbornly high, it has less room to cut interest rates aggressively.
But if interest rates remain high, borrowing becomes more expensive for households and businesses.
And if investors simultaneously demand higher yields on long-term government debt, the government faces higher financing costs as well.
The three parts of the economy therefore become connected: inflation, interest rates and government borrowing costs.
The oil connection makes the situation even more uncomfortable
This is particularly relevant to the oil-price situation we have been discussing.
Higher oil prices can feed inflation through petrol, diesel, transport, heating, manufacturing and food distribution.
If oil remains expensive for a prolonged period, central banks have to consider whether inflation is becoming embedded again.
That can make them reluctant to reduce interest rates.
Meanwhile, investors in long-term bonds may demand higher yields because they are worried that inflation will erode the value of the interest payments they receive over the next decade or two.
So an increase in oil prices can indirectly contribute to higher bond yields.
And higher bond yields can then contribute to higher borrowing costs for consumers and businesses.
It is one reason why the combination of higher oil prices and rising long-term bond yields deserves more attention than either development on its own.
This is no longer just an American story
Perhaps the most significant aspect of the current situation is its global character.
The Reuters assessment of the markets this week points to a broad rise in government borrowing costs across the US, Europe and Japan, with investors increasingly concerned about government spending, debt sustainability and persistent inflation.
Japan is especially significant.
For years, Japanese interest rates were extraordinarily low and Japanese investors became major participants in overseas bond markets. But Japanese government bond yields have now risen dramatically compared with the world Japan inhabited for much of the past two decades.
Germany is experiencing a similar structural change. Its 10-year Bund yield has climbed to levels not seen since 2011.
Britain is sitting alongside them, with 10-year gilt yields around 5%.
And America, despite the enormous global demand for Treasury securities, is seeing its 30-year borrowing cost approach levels last seen nearly two decades ago.
This synchronised movement is what makes the current episode so interesting.
The bond market may be telling governments something
I don't think it is accurate yet to describe this as a global bond-market crisis.
Markets are functioning, investors are still buying government debt and today's US yields have eased somewhat from their recent highs.
But the bond market does appear to be sending governments a warning.
For years, governments in Britain, America, Europe and Japan were able to borrow at extraordinarily low rates. That encouraged governments to become accustomed to cheap money.
That era may have ended.
The financial markets are now asking a much harder question:
What happens when governments have to pay a normal — or perhaps unusually high — price for all the borrowing they have accumulated?
For the ordinary person, that may sound like a problem for the Treasury, the Federal Reserve or the Bank of England.
It isn't.
If governments have to spend more money servicing debt, they eventually face difficult choices over taxes and public spending. If companies have to pay more to borrow, investment can suffer. If mortgage rates remain higher, households have less disposable income.
And if inflation remains elevated at the same time, people can be squeezed from both directions.
That is why the phrase “bond yields are rising” should not automatically be interpreted as good news.
For the investor looking for income, higher yields can be attractive.
For the government trying to balance the books, they are an increasing cost.
And for the household somewhere in Scotland trying to pay its mortgage, heat its home, fill the car and buy its weekly groceries, the consequences may eventually arrive without the household ever owning a single government bond.
The real significance of today's bond-market turmoil, therefore, is not simply that American Treasury yields have reached a 19-year high.
It is that the world may be moving into a period where governments, businesses and households can no longer assume that cheap money is the normal state of affairs.
And that could prove to be one of the most important economic changes of the decade.