Smile! The bond market is watching

So perhaps the red flag we have been watching in global bond markets for the past few weeks has finally stopped fluttering politely and started waving hard enough to demand attention. US 10-year Treasury yields have pushed towards 4.8 percent, Japan’s equivalent has crossed 3 percent for the first time in three decades, and borrowing costs across Britain, France and Germany have climbed to levels not seen in years.

Yet as this warning spread across the world’s most important debt markets, what occupied much of the recent G20 finance gathering in North Carolina?: arguments over trade, insults between allies and, remarkably, disagreement over who should appear in the family photograph. Perhaps the bond market should have asked for a seat in the picture.

The problem is becoming increasingly difficult to dismiss as another temporary tantrum. Government borrowing is enormous, inflation remains stubborn, energy prices are rising again, and the world’s biggest technology companies are competing aggressively with governments for the same pools of capital to finance the AI buildout. Investors, meanwhile, appear less willing to lend cheaply simply because they became accustomed to doing so during the long era of suppressed interest rates.

Could this be the moment when the price of money begins rediscovering its purpose?

There is an argument that higher yields should be welcomed. For years, artificially low interest rates distorted investment decisions, subsidised governments and encouraged borrowers to behave as though capital would remain almost free indefinitely. Perhaps bond investors are simply restoring discipline by demanding proper compensation for inflation, fiscal risk and uncertainty. But how comfortable should governments be when that repricing begins accelerating simultaneously across the US, Europe and Japan?

The numbers are becoming difficult to ignore. America’s debt has reached roughly $40 trillion. Japan’s 10-year yield has broken through a level that once seemed almost unimaginable. European governments are confronting large deficits and rising financing costs. And Japanese investors, historically among the most dependable buyers of foreign sovereign bonds, are beginning to find domestic debt attractive again as yields at home rise. Could one of the great structural flows underpinning global bond markets therefore be starting to reverse?

Japanese investors have already sold a net three trillion yen of overseas debt this year, while pension funds are showing greater interest in domestic bonds. Nobody is suggesting Tokyo is about to dump its vast foreign holdings overnight. Yet perhaps the more important question is what happens if Japan gradually stops being the marginal buyer that global borrowers quietly relied upon for decades.

Then there is the Iran war. Once again, a conflict that was supposed to deliver strategic clarity is producing economic consequences far removed from the battlefield. Renewed US-Iran strikes have pushed crude back above USD90, revived inflation fears and strengthened expectations of further central-bank tightening. The Strait of Hormuz remains heavily disrupted, with Washington and Tehran still contradicting each other even over whether it is open.

Was this really part of the plan?

The irony is particularly uncomfortable for Washington. The United States wants strong growth to help outrun its debt burden. Treasury Secretary Scott Bessent has argued that growth is the only realistic way out. Yet the same AI investment boom expected to lift productivity is also generating enormous borrowing demand, pushing up the cost of capital. Meanwhile, the Iran conflict keeps energy prices elevated, reinforcing inflation risks and making lower interest rates harder to deliver. So, can growth really rescue the debt problem if stronger growth itself keeps interest rates higher?

That question becomes even more important when central banks enter the picture. Federal Reserve Chair Kevin Warsh has already pushed markets towards expecting another rate increase after acknowledging insufficient progress on inflation. Futures now imply a considerably higher probability of tightening this month, while similar expectations surround the European Central Bank and Bank of Japan. Perhaps the world is discovering that the supposedly temporary era of high rates may be rather less temporary than expected.

The bond market appears to be entertaining that possibility already. Real yields have risen sharply across several developed economies, suggesting investors may be reassessing where the so-called neutral interest rate actually sits. If AI investment, government deficits, geopolitical disruption and higher energy prices are structurally increasing demand for capital, could the equilibrium cost of money simply be moving higher? That would carry consequences well beyond bond portfolios.

A 10-year Treasury yield approaching 5 percent competes directly with equities for capital. Why accept considerable valuation risk in stocks when supposedly risk-free government debt begins offering close to 5pc? And how much more difficult does the argument become for highly valued technology companies whose expected profits lie years into the future? The warning, therefore, travels quickly from sovereign debt into equities, currencies, mortgages and corporate financing, and eventually it reaches countries such as Pakistan.

For an oil-importing frontier economy, the combination is particularly awkward. Higher crude prices pressure the import bill and inflation. Higher US yields make global capital more expensive. A stronger dollar can tighten external financing conditions further. And when investors become more selective about risk, smaller economies rarely get the luxury of pretending the global repricing is somebody else’s problem. How much room does domestic policy really have when oil, interest rates and global risk premiums all move against it at once?

Perhaps the latest bond selloff will eventually stabilise. Perhaps buyers will return as yields become attractive. Perhaps the G20’s confidence that growth can eventually solve the debt problem will prove justified. But could the more worrying possibility be that global leaders are still treating these signals as isolated problems while bond markets increasingly price them as one connected story?

The family photograph may have caused trouble in Asheville, but the picture developing in global bond markets looks considerably harder to crop.

Copyright Business Recorder, 2026