The U.S. bond market is flashing serious warning signs, pushing the Trump administration into emergency intervention mode as long-term borrowing costs hit levels not seen in nearly two decades.

On Tuesday, the yield on the 30-year Treasury bond surged past 5.3 percent — the highest since April 2007, just months before the 2008 financial crisis. The yield settled at 5.285 percent at Tuesday's close and has since eased to around 5.2 percent, but it has not closed below 5 percent since July 6.

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Economists point to a volatile mix of factors driving the spike: the ongoing Iran conflict, President Trump's unpredictable trade policies, massive spending on artificial intelligence infrastructure, and the ballooning national debt, which topped $40 trillion on Monday — up roughly $16.5 trillion from March 2020.

“One explanation is uncertainty,” said Benjamin Chabot, a former Federal Reserve senior policy adviser and adjunct professor at Northwestern University. “We have a new Fed Chair. We have an FOMC that looks legitimately divided about what the proper policy path is, and that’s largely driven by uncertainty about the economy.”

In response, the Treasury Department announced Wednesday it will double the maximum amount of long-term debt it can buy back, from $2 billion to $4 billion per operation, effective Sept. 9 through at least Nov. 4. The move is designed to inject liquidity and ease pressure on long-term yields.

“The bond reaction to me signals that they are finally paying attention,” said John Deal, managing director at Post Oak Group's capital markets advisory practice. “Finally saying ‘OK, this is something that does indeed have stiff consequences if we get it wrong and it needs to be responded to.’”

Markets rallied on the news, with bond yields plunging and gold and silver prices rising. But critics argue the Treasury's action is a short-term fix that fails to address the root causes.

“We’re artificially manipulating those lower interest rates,” said Joel Griffith, a senior fellow at Advancing American Freedom, the think tank founded by former Vice President Mike Pence. “We can temporarily get a reprieve in the lower rates by doing what the Treasury is doing — borrowing short-term debt and using the proceeds to buy back the long-term debt. But all that does in reality is just pump up asset prices.”

Griffith added: “This does nothing to help typical families. It does nothing to help small businesses that are going to continue to bear the consequences of what is driving that long-term rate. They are addressing the symptom rather than the problem.”

David Kass, a finance professor at the University of Maryland, compared the move to quantitative easing — the Fed's practice of buying assets to stimulate the economy. He said the Treasury's action could modestly lower the 10-year yield, which “should lower the cost of a 30-year mortgage or other consumer loans.”

But Griffith argued that market rates should reflect “the reality that Democrats and Republicans are not addressing the problems.” He said, “The hope would be that at some point this would actually push political leaders into making the hard decisions. It’s far better for us to deal with some economic pain now in hopes that we can address these long-term problems rather than continue to kick the can down the road, which is basically what the Treasury is doing this morning.”

The Iran conflict has added further strain. Analysts at the Center for Strategic and International Studies estimated in June that the war has cost the federal government between $35.2 billion and $42.5 billion, with the administration seeking tens of billions more from Congress. Kass noted that a prolonged conflict could push oil prices higher, squeezing Americans' finances further.

President Trump, however, downplayed the bond market volatility during a White House meeting with cryptocurrency executives on Wednesday, saying, “No, I don’t think so” when asked if Americans should be concerned. He called interest rates “artificially high” and renewed his push for the Federal Reserve to cut rates.

As the administration scrambles to steady the markets, the debate intensifies over whether these measures are genuine relief or just a temporary Band-Aid on a deeper fiscal wound.