Sep 7, 2026 · 18 min · 8 segments
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Jiang ShichengHost
This past week, the United States Treasury sold $25 billion in 30-year bonds at a yield of 5.216%.
The last time the American government had to pay this much to borrow money for 30 years, the Twin Towers were still standing.
The day before that auction, a 10-year Treasury auction drew the highest financing cost at that maturity since 2007, and these are not isolated events.
Bond yields are hitting multi-decade highs in Japan, where the 10-year government bond just touched 2.9%, its highest level since 1996, in the United Kingdom, in Germany, in France, in Australia.
The Federal Reserve held rates steady, but three officials voted for a rate hike.
And all of that is true, but that explanation is too simple, because here is the part the headlines skip.
The July CPI report actually showed inflation cooling, down from 3.5% in June and well below the 4.2% peak in May.
If this were purely about inflation, bond yields should have eased on that data.
It is pricing the possibility that sovereign debt as an asset class is fundamentally less trustworthy than it was a year ago.
And to understand why, you first have to understand a concept I call the compounding ratchet.
This past week, the United States Treasury sold $25 billion in 30-year bonds at a yield of 5.216%.
The last time the American government had to pay this much to borrow money for 30 years, the Twin Towers were still standing.
The day before that auction, a 10-year Treasury auction drew the highest financing cost at that maturity since 2007, and these are not isolated events.
Bond yields are hitting multi-decade highs in Japan, where the 10-year government bond just touched 2.9%, its highest level since 1996, in the United Kingdom, in Germany, in France, in Australia.
The Federal Reserve held rates steady, but three officials voted for a rate hike.
And all of that is true, but that explanation is too simple, because here is the part the headlines skip.
The July CPI report actually showed inflation cooling, down from 3.5% in June and well below the 4.2% peak in May.
If this were purely about inflation, bond yields should have eased on that data.
It is pricing the possibility that sovereign debt as an asset class is fundamentally less trustworthy than it was a year ago.
And to understand why, you first have to understand a concept I call the compounding ratchet.
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