Global investors are confronting a “perfect storm” as the ongoing war in Iran threatens a prolonged inflationary shock. Sovereign bond yields across the Group of Seven (G7) richest nations have surged to decade-highs, threatening a severe global spending crunch.
The Global Yield Explosion (Key Numbers):
- G7 Average: The average 10-year G7 government borrowing rate is approaching 4% (up from 3.2% pre-war), while 30-year costs have climbed to 4.6% (up from 4%).
- United States: Benchmark 10-year Treasury yields hit 4.631% (highest since Feb 2025). The 30-year yield—which dictates consumer mortgages—hit a one-year high of 5.159%.
- Germany: The Eurozone benchmark 10-year Bund yield hit a 15-year peak of 3.193%, gaining 10 basis points (bps) in a week.
- Italy & France: Italian 10-year yields reached 3.90% (+12 bps in a week), while French yields spiked 26 bps.
- Japan: 30-year JGB yields surged to a record 4.20%, while 10-year yields hit 2.80% (highest since Oct 1996).
- United Kingdom: 10-year UK Gilts recovered slightly to 5.14% but remain the worst-performing 10-year bonds in the developed world since the war began.
Monetary Policy Reversal & Funding:
- Fed Rate Hike Priced In: Markets are now pricing in a 50% probability that the U.S. Federal Reserve will raise interest rates by December, completely reversing pre-war expectations of rate cuts.
- Stock Market Impact: Wall Street indexes trended lower as analysts warn record-high equity markets have not yet priced in the corporate margin squeeze of a higher-for-longer regime.
- Short-End Stability: U.S. overnight funding markets remained stable, with the tri-party general collateral rate flat at 3.55% due to reduced Treasury bill supply and Fed asset management.
The Bottom Line: As G7 finance leaders warn that public debt is back under intense scrutiny, stopping this bond market crash will require either a drop in crude oil prices, hardening global recession data, or bond prices falling low enough to attract capitulated buyers. Until then, expensive market-driven borrowing costs will weigh heavily on consumer spending and corporate projects like AI data center builds.