CHICAGO - MARCH 28: Traders in the Ten-Year Treasury Note options pit at the Chicago Board of Trade signal offers in a flurry of activity following the announcement by the Federal Open Market Committee that it was raising short term interest rates another .25 percent March 28, 2006 in Chicago, Illinois.

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Treasury yields are continuing to climb, and at a particularly bad time as higher rates worsen the impact of the nearly $40 trillion government debt load.

Longer-dated debt has been hit particularly hard by the recent leg up, pushing the 30-year bond yield close to its highest level since the early part of the 21st century. Other maturities also have risen, owing to a number of factors conspiring to raise financing costs.

Fixed income strategists ascribe the run that began in June to a number of variables: Intensified concerns over a budget deficit that appears set to eclipse its 2025 level; inflation in an ominous holding pattern above the Federal Reserve's 2% target despite moderating data over the past two months; and a rash of corporate debt issuance competing with Treasurys for investors' favor.

Broadly, the move can also be attributed to a rising term premium, or the extra yield investors demand to hold U.S. debt.

Together, the various factors have combined to create a difficult environment for fixed income, though one that has yet to materially hit the stock market. Yields turned lower Tuesday, easing a trend that has seen the 30-year yield jump more than 40 basis points, or 0.4 percentage point, since the late-June low.

"These are not new forces, and the rise in long-term yields has been gradual rather than sudden," Anshul Pradhan, head of U.S. rates research at Barclays Capital, said in a Monday client note. "What is notable today is not the existence of these pressures, but that they appear strong enough to overwhelm individual soft-data releases. Three independent releases argued for lower yields this month; long end yields moved higher anyway."

Multiple causes

Indeed, recent inflation data has been at least moving in the right direction: Both consumer and producer prices were little changed in July, and the core measure that excludes food and energy stood at 2.5% —essentially where it was before the war against Iran began in late February.

But the recent moves appear to be about more than inflation.

For one, there's the debt and deficit situation.

The U.S. saw a budget shortfall of $432.3 billion in July, the widest single-month gain since March 2021 and likely locking in a $2 trillion deficit for the full year ending Sept. 30. Total government debt is a hair below $40 trillion, with the public portion of that soon to hit 100% of gross domestic product.

Debt financing costs have totaled $1.12 trillion through July and are expected to hit $1.37 trillion for the full fiscal year, or about $84 billion more than in 2025. On net, the government has spent more on debt financing this year than anything else outside of Social Security and Medicare.

Market veteran Ed Yardeni coined the term "bond vigilantes" in the early 1980s to describe fixed income investors who go on strike to protest poor fiscal conditions. In a CNBC interview, the head of Yardeni Associates, though generally constructive on both the debt and equity markets, said, "We're kind of testing the outer limits of where the bond vigilantes are really going to start protesting."

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"They're concerned that maybe the Fed isn't being vigilant enough about inflation; they're concerned about the price of oil," he said. "But at the end of the day, the bond yield wouldn't be here if the economy wasn't doing well. So I view it as a vote of confidence in the strength of the economy."

AI issuance factor

Bonds are facing other tests as well.

The surge of investment in artificial intelligence has coincided with a rush of companies coming to market in search of capital.

So far this year, U.S. companies have issued nearly $1.7 trillion in bonds, up 27% from the same period a year ago and more than all of 2025 combined, according to Securities Industry and Financial Markets Association data. The trend is mirrored overseas, with government debt yields surging around the world.

Normally, U.S. Treasury debt is considered the deepest and most liquid market in the world. But that doesn't mean there's no competition.

"On top of concerns about the growth of government debt, a record pace of corporate bond issuance has added substantial duration supply to U.S. fixed income markets, with consequences for the outright level of yields as well as the shape of the yield curve and term premium," Ian Lyngen, head of U.S. rates strategy at BMO Capital Markets, said in a note.

"The path of least resistance will likely favor higher long-end rates in the near-term unless there is a slowdown in the market supply of duration, sharp tightening of financial conditions or dimming of the economic outlook," he added.

The Fed factor

Then there's the Fed itself.

New Chairman Kevin Warsh has been coy about where he sees rates headed, keeping with his disdain for forward guidance. A suddenly opaque central bank has added another layer of tension to a market already balancing multiple other risks, with yields rising even though the Fed has kept its benchmark steady in a range between 3.50%-3.75% all year.

Markets now are pricing in little chance the Fed will raise at its September meeting and, in fact, now doesn't foresee a high probability of an interest rate increase until December, according to the CME Group's FedWatch tool. In turn, that has caused markets to question whether the Fed is committed to its 2% inflation target as staunchly as official rhetoric suggests.

Still, Yardeni is encouraged to see a market less influenced by the Fed, and expects that higher yields will soon attract buyers.

"The bond market is actually finally working the way it should work. It's allocating capital efficiently," he said. "It wasn't doing that when the Fed was basically rigging the bond market by keeping the bond yield close to zero by dropping the federal funds rate down to zero. So this this is kind of back to market-driven interest rates."

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