The bond market rarely attracts the attention of ordinary consumers, yet it is one of the most powerful forces in the global economy. The US Treasury market alone is worth around $31.5 trillion, and movements within it help determine the price of money far beyond Wall Street. In recent weeks investors have demanded higher yields to hold US government debt. The yield on the benchmark 10-year Treasury has climbed to around 4.7%, while 30-year yields have moved above 5%. Several forces are driving the change, including America’s enormous federal debt, persistent budget deficits, inflation concerns and the increasing volume of bonds the government must sell to investors. Higher energy prices and geopolitical uncertainty are adding pressure, while technology companies are also competing for huge amounts of capital to finance data centres and artificial-intelligence infrastructure. At the same time, US Treasurys face stronger international competition. After decades of extremely low interest rates, long-term government bonds in Japan, Britain and other major economies are offering much higher yields. Large pension funds, insurers and global investors therefore have more alternatives, meaning the United States may need to offer increasingly attractive returns to keep drawing capital into its debt market.
For ordinary households, the consequences are very real. The 10-year Treasury yield acts as a benchmark for a large part of the credit system, so when it rises, mortgage rates and the cost of car loans and business financing tend to rise as well. More expensive borrowing can discourage home purchases, reduce corporate investment and weaken consumer spending, eventually slowing economic growth. The impact on government finances is equally important. US federal debt has already exceeded $40 trillion, and as older securities mature and are replaced with bonds carrying higher yields, the government’s interest bill increases. The Treasury Department has even taken the unusual step of expanding purchases of longer-term government bonds in an attempt to calm the market and reduce yields, although the relief has so far proved limited. Higher yields are not bad for everyone – savers and investors buying bonds can receive better returns. The bigger danger appears when investors consistently demand higher compensation to finance government deficits. Governments can then face increasingly difficult choices between higher taxes, spending reductions or issuing still more debt. That is why the bond market is sometimes described as a force capable of disciplining even the world’s most powerful governments: when investors lose confidence, the cost of borrowing can change far faster than politics.
