Global bond markets revolt against fantasy budgets, German and Japanese 30-yr yields erupt to multi-year highs

No cuts no taxes just debt and now rates bite back.

Bond markets are sending a message. The UK’s 30-year gilt yield closed at 5.44% on July 11, 2025, the highest level since 1998. That’s above Greece, France, and Italy. Japan’s 30-year yield printed 3.18%, and Germany’s Bunds hit 3.20%. These are not isolated spikes. They’re coordinated reactions to fiscal excess.

The UK’s budget is bloated. Labour’s spending review added billions to defense, infrastructure, and welfare. Tax hikes followed. Public sector borrowing is near 5% of GDP. Debt-to-GDP is climbing. Inflation is stuck at 3.4%. GDP contracted 0.3% in April and 0.1% in May. Manufacturing is shrinking. Construction is flat. The pound is sliding. Bond traders are pricing collapse risk.

Japan’s 40-year bond yield hit 3.61% in May. The 30-year yield is holding near 3.18%. The Bank of Japan ended yield curve control and negative rates last year. Life insurers stopped buying long-term debt. Inflation is holding above 3.3%. The BoJ is tightening. Japanese investors are dumping US Treasuries and repatriating capital. The yen carry trade is unwinding.

Germany lifted its debt brake. Defense spending is up. The 30-year Bund yield jumped 36 basis points in two months. The 10-year yield is at 2.79%, up 43 basis points. The ECB cut rates five times. Investors aren’t buying the growth story. The spread between Italian and German bonds narrowed to 100 basis points. That’s compression. Not confidence.

Sources:

https://tradingeconomics.com/united-kingdom/30-year-bond-yield

https://www.cnbc.com/2025/05/22/global-bonds-selloff-investors-turn-away-from-long-dated-debt.html

https://www.oanda.com/us-en/trade-tap-blog/analysis/fundamental/record-spike-japan-jgb-yield-causes-market-impact/

https://www.morningstar.com/bonds/how-fund-managers-are-reacting-german-bond-markets-once-in-a-generation-selloff

https://www.ssga.com/ca/en/institutional/insights/mind-on-the-market-30-may-2025

https://www.forbes.com/sites/mikeosullivan/2025/05/23/the-bond-market-is-revoltingwill-there-be-a-debt-crisis/



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