Treasury yields hold near two-decade highs as the curve steepens

US Treasury yields rose again at the start of the week, with mid-dated and long-dated maturities outpacing shorter ones and steepening the yield curve³. One account put the 10-year yield at 5.28% as the selloff deepened⁶. Another described the 10-year as softening from a 24-year high, which suggests the move has been choppy rather than one-directional¹. US equity indexes were mixed while yields traded at their highest in two decades³.

The Wall Street Journal dated the turn in the market to Sept. 29, when New York Fed President John Williams suggested that an October rate increase was likely². The newspaper described the episode as a bond selloff marked by a steepening yield curve rather than a parallel shift². The 30-year rate led the rise on the day³.

The distinction matters for what is being priced. A steepening led by the long end points to term premium and supply rather than the policy rate alone³, while the catalyst identified by the Journal was a comment about the near-term policy path². Both forces are in the market at once.

Why it matters to investors

The move is no longer confined to government paper. The Financial Times reported that the surge in borrowing costs is hitting corporate America, following a sell-off that last week pushed the 10-year yield higher⁴. Semafor said yields across much of the G7 have surged in recent months as investors fret over stubbornly high inflation and unrelenting borrowing⁵, which makes this a funding-cost story for sovereigns and companies at the same time.

Equity markets have not followed the bond market down. US stocks rose as optimism about the artificial-intelligence boom offset the rise in bond yields around the world⁷. That divergence is the central tension: index levels are being set by one narrative while the discount rate is being set by another^3,7.

What to watch

The fiscal arithmetic depends on where yields settle. Congressional Budget Office figures cited in coverage of the selloff show net public debt rising from 101% of GDP this year to over 175% by 2056 – and that projection assumes a 10-year yield below 4.5%¹. Current levels sit above that assumption⁶, so the published debt path is already running on a stale input.

Watch whether the curve keeps steepening, since that is what distinguishes a repricing of term premium from a repricing of policy^2,3. Watch also whether the equity bid survives if borrowing costs keep climbing for corporate issuers^4,7.

The breadth of the move is the other thing to follow. Semafor’s point was that this is not a US-only repricing, with yields across much of the G7 surging in recent months⁵, so a reversal would need the inflation and borrowing concerns behind it to ease in more than one country.