Global Bond Yields Hit Multi‑Year Highs as AI Build‑Out and Fiscal Deficits Collide

Long‑term government bond yields are grinding higher across global markets, led by the United States. By late July, the 10‑year U.S. Treasury yield had climbed to around 4.7%, its highest level in roughly 18 months, while the 30‑year yield hovered near 5.2%, a peak not seen in almost two decades. Behind this move is more than just lingering inflation: analysts increasingly point to ballooning fiscal deficits and a massive wave of capital spending on AI‑related infrastructure as key drivers pushing borrowing costs upward.

Market commentators stress that this cycle differs from past sell‑offs in government debt. Rather than reacting solely to central‑bank tightening, investors are demanding a richer term premium to lock up capital for years in an environment of heavy government issuance and intense corporate funding needs. In effect, the global economy is competing for scarce long‑term savings, and bond investors are using higher yields to ration that capital.

The repercussions extend well beyond fixed income. Higher discount rates pressure valuations for growth stocks and other long‑duration assets, including real estate and infrastructure plays. Highly leveraged companies and countries also face rising refinancing risks. At the same time, relatively safe government and investment‑grade bonds now offer yields that many investors find compelling after a decade of near‑zero rates. The shift suggests portfolios worldwide may need a structural rethink, with greater emphasis on interest‑rate risk and on the possibility that “higher for longer” is not just a slogan but the new baseline for global markets.