The mid-week selloff at the long-end of the US Treasury curve was exactly what Scott Bessent didn’t need.

30-year US yields approached 5.10% on Wednesday in the wake of a 20-year sale which, contrary to the mainstream media narrative, didn’t stick out as particularly weak.

Remember: The 20-year’s an eccentric security. There’s nothing alarming about a 1bps tail at a 20-year auction, although I suppose you could argue the juicy yield on offer should’ve been irresistibly enticing such that the sale counted as a barnburner. But look, the indirects award was 69%, higher than average. That doesn’t exactly scream “buyers’ strike.”

In a way — and BMO’s Ian Lyngen alluded to this late Wednesday — the fact that the 20-year sale wasn’t actually all that bad made the subsequent price action at the long-end even more disturbing.

The yield on the long bond’s up nearly 20bps in three sessions, which is to say since the Moody’s downgrade. Wednesday was among the worst days of the year for the US long-end.

The late-day escalation came during a session when market participants continued to fret about simultaneous weakness in the dollar and US Treasurys, a conjuncture dubbed the “sell America” trade.

On Capitol Hill, Mike Johnson was still working to herd cats in an increasingly fraught bid to push through Donald Trump’s “big beautiful” tax bill, which’ll balloon the deficit by a “big beautiful” $3 trillion.

The higher bond yields go, the worse the math looks due to the read-across for America’s debt servicing payments. The figure below gives you some context for where America stands in that regard as a share of GDP compared to other nations.

That chart comes with the (important) caveat that not every country listed is a monetary sovereign, and a lot of the countries which are don’t issue reserve currencies, or in some cases even hard currencies.

It’s pretty obvious that US equities have run as far as they’re going to run with Treasury yields rising. From here, stocks aren’t going meaningfully higher unless the bond selloff abates.

“It is hard for US equities to stay resilient in this environment,” Deutsche Bank said, noting that investors are “building fiscal risk premium into US assets” and it’s difficult “to make the case that such a (negative) driver of the rising cost of capital is positive for risk.”

Bessent and Trump really need to put the brakes on this, but as BMO’s Lyngen pointed out, Bessent doesn’t have the same setup Janet Yellen did in November of 2023 when she faced a similar situation. Recall that Yellen had been raising coupon auction sizes at the QRAs, and markets anticipated additional increases. All she had to do was tip a smaller-than-expected increase to allay over-supply concerns. A few months later, in early 2024, she indicated Treasury didn’t expect to increase coupon auction sizes any further for the foreseeable future. Bessent retained that forward guidance in his first two QRAs, and that’s really all he can do.

With a nod to my suspicion that dip-buyers will step in if 30-year yields rise much further, I’d be remiss not to acknowledge that this looks a bit like a falling knife. The repricing may have further to go. The late-October 2023 highs may not be the ceiling. If that’s the case, Trump has a problem.

“It goes without saying that if Trump is, in fact, looking to the Treasury market as a barometer of investors’ approval of the action in Washington, then the recent selloff that brought 30-year yields from as low as 4.65% earlier this month to 5.095% is without question a troubling development,” Lyngen went on. The title of his Wednesday afternoon note was “Bessent, Meet Truss.”