US bond yields hit three-year high as Iran war fuels inflation

September 3, 2026 at 02:07 AM2 min

This digest was compiled by AI from multiple sources — links to the originals are below.

The yield on the benchmark 10-year US Treasury climbed to its highest level in nearly three years on Wednesday. The rise reflects war-driven energy costs and inflation worries amid America's $40 trillion debt. Global bond yields are also surging, with Japan's 10-year crossing 3% for the first time since 1996.

Key Facts

The 10-year US Treasury yield hit its highest level in nearly three years on Wednesday.
Japan's 10-year government bond yield crossed 3% on Sept. 1, 2026, for the first time since October 1996.
US diesel prices have spiked 51% since the war with Iran started in late February.
Last month was the most expensive August for US gasoline prices in history, according to AAA.
The UK's 30-year bond yield hit its highest level since 1998, and Germany's 10-year yield reached levels unseen since 2011.

Bond Market Stress

The US bond market is flashing warning signs as the war with Iran drives up defense spending and energy costs. The 10-year Treasury yield, a benchmark for borrowing costs, climbed to its highest level in nearly three years on Wednesday. Higher yields will make mortgages, business loans, and government debt payments more expensive. Hardika Singh, economic strategist at Fundstrat, said the inflation problem, the war, and the deficit show no end in the near term.

Global Yield Surge

Bond investors worldwide are pushing yields higher, with Germany's 10-year yield recently hitting levels unseen since 2011. The UK's 30-year yield reached its highest since 1998, and Japan's 10-year government bond crossed 3% for the first time since 1996. Higher bond yields are drawing investors away from stocks by offering a risk-free alternative. The closer the US 10-year yield gets to 5%, the harder it is to justify buying tech stocks with historically high valuations.

Energy Price Impact

The war with Iran has disrupted energy flows from the Persian Gulf, forcing investors to reprice energy, inflation, and bonds. Workarounds, including sneaking oil tankers out of the Persian Gulf and China slashing oil imports, have limited the damage. US diesel prices have spiked 51% since the war started, and last month was the most expensive August for gasoline in US history.